CN1272922A - Touch screen device with front lighting - Google Patents
Touch screen device with front lighting Download PDFInfo
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- CN1272922A CN1272922A CN99800884A CN99800884A CN1272922A CN 1272922 A CN1272922 A CN 1272922A CN 99800884 A CN99800884 A CN 99800884A CN 99800884 A CN99800884 A CN 99800884A CN 1272922 A CN1272922 A CN 1272922A
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- guide plate
- light guide
- transparent
- touch
- light
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133616—Front illuminating devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2209/00—Layers
- H01H2209/024—Properties of the substrate
- H01H2209/038—Properties of the substrate transparent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2209/00—Layers
- H01H2209/068—Properties of the membrane
- H01H2209/082—Properties of the membrane transparent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/002—Legends replaceable; adaptable
- H01H2219/01—Liquid crystal
- H01H2219/012—Liquid crystal programmable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/036—Light emitting elements
- H01H2219/044—Edge lighting of layer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/054—Optical elements
- H01H2219/056—Diffuser; Uneven surface
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/054—Optical elements
- H01H2219/062—Light conductor
Abstract
A reflecting type liquid crystal display (5), a front light unit (15) including a transparent 0.3-2.0 mm thick light guide plate (3) and a light source (4) set at an end face of the light guide plate, and a transparent touch panel (14) are sequentially layered on a reflecting plate (6).
Description
The present invention relates to the touch panel device of irradiation before a kind of the configuration, this device has becoming the preceding irradiation of the liquid crystal display illumination of one with touch-screen (touch plate).Be particularly suitable for having the portable electric appts of reflection LCD according to the touch panel device of irradiation before the configuration of the present invention, as wireless phone, mobile phone, scientific calculator, notebook personal computer, PDAs (personal digital assistant), digital camera, video camera, business application communication apparatus etc.
The light small and exquisite portable electronic instrument that has liquid-crystal display section is developed now and enter commercial the application.The transmission type lcd device that is used in liquid-crystal display section needing under the situation of portable electric appts to be used for a kind of by dry cell, rechargeable battery or similar battery-driven backlight.Particularly, the cold cathode fluorescent tube that required color monitors such as notebook computer, PDAs, digital camera need utilize high illumination is backlight as light source, thereby finally will consume lot of energy, has shortened the driving time of battery.
Therefore, researchers develop and utilize a kind of reflection LCD, portable electric appts are not needed backlight, have reduced power consumption.Such LCD does not also enter the commercial application stage now.Do not use backlightly, reflection LCD only consumes power seldom.In addition, even when using in the external world, have under the situation of exterior light photograph, reflection LCD also shows very high visuality.Therefore, on this point, reflection LCD is suitable for being used in the portable electronic instrument.
Yet, when in the environment that can not guarantee sufficient ambient light as indoor or when using reflection LCD night, need throw light on to reflection LCD from the front side, this just causes proposing a kind of lighting device (preceding illuminating apparatus) that is positioned the light source on the reflection LCD that has.
According to an example that proposes, lighting device is installed on the header field or stowable support of reflection LCD.In the lighting device of another kind of type, be suitable for directly reflection LCD being thrown light on such as cold cathode fluorescent tube, bulb or LED.In the different lighting device of another kind, resin plate with light scattering characteristic or film, or have the resin plate of optically focused characteristic or the front portion that film is placed in light source, indirectly reflection LCD is thrown light on.
Luminophor at lighting device is placed in the situation of reflective liquid crystal LCD header field, and it is very thick that top cover is done, the portability that has hindered portable electric appts.The design originally of the top cover of reflection LCD is in order to protect reflection LCD not to be subjected to extraneous bump, and does not therefore advocate to be arranged on the top cover hitting frangible luminophor.
On the other hand, the lighting device that is installed to support may neglectful operation cause breaking of support or light source when using, or when not using because need one to accommodate the accommodation structure of support and cause the complexity of structure.
The present invention designs and solves above-mentioned constant part, and a kind of purpose that disposes the touch panel device of preceding irradiation is provided in addition, and this device can not damage the portability of portable electric appts to the reflection LCD illumination.
Finish these all aspect the time, according to a first aspect of the invention, provide the touch panel device of irradiation before a kind of the configuration, comprising: a reflection LCD; A front lighting unit that comprises the transparent light guide plate and be arranged on the light source on end face of light guide plate; With a transparent touch-sensitive panel, they stack gradually on reflecting plate.
According to a second aspect of the invention, a kind of touch panel device according to irradiation before the configuration of first aspect is provided, wherein transparent touch-sensitive panel is the resistance-type transparent touch-sensitive panel, has a top that is bonded to the front lighting unit of transparent touch-sensitive panel bottom by transparent resin layer.
According to a third aspect of the invention we, a kind of touch panel device according to irradiation before the configuration of first aspect is provided, wherein transparent touch-sensitive panel is a resistance-type film class transparent touch-sensitive panel, and the top of front lighting unit and the bottom of transparent touch-sensitive panel bond by transparent resin layer.
According to a forth aspect of the invention, a kind of touch panel device according to irradiation before the configuration of first to the 3rd either side is provided, wherein have the small polygon or the circular dot matrix gradual change pattern that are formed on the surface at least, use ink on the light guide plate, the size of point is not more than 200 μ m, the area ratio is not more than 60%, and the principal ingredient of ink is the transparent or semitransparent resin that refractive index is higher than light guide plate.
According to a fifth aspect of the invention, a kind of touch panel device according to irradiation before the configuration of first aspect is provided, wherein has the dot matrix gradual change pattern that utilizes ink to form on the light guide plate, the principal ingredient of ink is the transparent or semitransparent resin that refractive index is higher than light guide plate, but also comprises the pigment of scattered light.
According to a sixth aspect of the invention, provide a kind of touch panel device according to irradiation before the configuration of first to the 3rd either side, wherein a side of light guide plate is made of the transparent or semitransparent resin that refractive index is higher than light guide plate at least.
According to a seventh aspect of the invention, provide a kind of touch panel device according to irradiation before the configuration of first to the 6th either side, wherein a side of light guide plate is formed with the fine-grannular pattern at least.
According to an eighth aspect of the invention, a kind of touch panel device according to irradiation before the configuration of first to the 6th either side is provided, wherein be formed with a plurality of prisms in light guide plate in the face of a side of reflection LCD at least, prism is formed on the light guide plate with the spacing of 30-500 μ m and the fabric width of 30-100 μ m, is parallel to an incident end face of display.
According to a ninth aspect of the invention, provide a kind of transparent touch-sensitive panel device according to irradiation before the configuration of first to the 8th either side,
Wherein, transparent touch-sensitive panel comprises: the pole piece that powers on has the top electrode on the lower surface that is formed on membranaceous dielectric base on the pole piece that powers on; With a bottom electrode sheet, be formed on the bottom electrode sheet on the bottom electrode upper surface of membranaceous or sheet dielectric base and have small projection and depression, wherein power on pole piece and bottom electrode sheet by the air layer between the electrode face with each other arrange and
Wherein, light guide plate is adhered to the rear surface of transparent touch-sensitive panel by transparent resin layer, and transparent touch-sensitive panel and front lighting unit are combined as a whole.
According to the tenth aspect of the invention, provide a kind of transparent touch-sensitive panel device according to irradiation before the configuration of the 9th aspect, wherein the recess of microspike and depression is made of the many small depression on the dielectric base entire upper surface.
According to an eleventh aspect of the invention, provide a kind of transparent touch-sensitive panel device according to irradiation before the configuration of the tenth aspect, wherein away from the area of the small depression of light source than area ratio greater than near the small depression light source.
According to a twelfth aspect of the invention, a kind of transparent touch-sensitive panel device according to irradiation before the configuration of the 9th to the 11 either side is provided, and the membranaceous dielectric base that wherein has microspike and a depression has and a plurality ofly was melted in the microspike that forms in the resin by transparent small bead before molded membranaceous insulation base.
According to a thirteenth aspect of the invention, a kind of transparent touch-sensitive panel device according to irradiation before the configuration of the 9th to the 11 either side is provided, and wherein the projection in microspike and the depression is formed in the coating by the ink that coating and printing comprise small transparent bead.
According to a fourteenth aspect of the invention, provide a kind of transparent touch-sensitive panel device according to irradiation before the configuration of the 13 aspect, its floating coat is formed in the dot matrix gradual change pattern, and this pattern compares greater than near the ratio of the area the light source at the area away from the light source place.
According to a fifteenth aspect of the invention, provide a kind of touch panel device according to irradiation before the configuration of the first to the 14 either side, wherein light guide plate comprises: a plane that is positioned at touch-screen one side; With a sloping portion (33b) that is positioned at the planar section with plane (33a) of LCD one side and has inclined surface in LCD one side, the light beam that enters from light guide plate one side reflexes to light guide plate inside on the plane of planar section, and light beam throws to the outside from the inclined surface of sloping portion.
According to a sixteenth aspect of the invention, a kind of transparent touch-sensitive panel device according to irradiation before the configuration of the 15 aspect is provided, wherein, by the light source place end face of light guide plate with to be in the angle that forms between the light guide plate surface of touch-screen one side be 88-92 °, angle between the plane of planar section and the dip plane of sloping portion is not less than above-mentioned angle and less than 180 °, wherein sloping portion with LCD one side surface on the reverse direction adjacent plane part of the light guide plate plane of incidence.
According to a seventeenth aspect of the invention, provide a kind of touch panel device, also be included on the surface of light guide plate of LCD one side and form the hyaline layer of a refractive index less than light guide plate according to irradiation before the configuration of the first to the 16 either side.
According to an eighteenth aspect of the invention, provide a kind of touch panel device according to irradiation before the configuration of the first to the 17 either side, wherein light guide plate has the thickness of 0.3-2.0mm.
Various aspects of the present invention and characteristics will become more clear to the description of embodiment with reference to the accompanying drawings by following, wherein:
Fig. 1 is the touch panel device sectional view of the preceding irradiation of configuration in the first embodiment of the invention;
Fig. 2 is the skeleton view of portable electric appts, is an instantiation with touch panel device of the preceding irradiation of configuration among first embodiment;
Fig. 3 is the skeleton view of portable electric appts, is another instantiation with touch panel device of the preceding irradiation of configuration among first embodiment;
Fig. 4 is the concrete structure sectional view of the touch panel device of the preceding irradiation of configuration among first embodiment;
Fig. 5 is the touch panel device sectional view of the preceding irradiation of configuration in the second embodiment of the invention;
Fig. 6 is the touch panel device sectional view of the preceding irradiation of configuration in the third embodiment of the invention;
Fig. 7 is the touch panel device sectional view of the preceding irradiation of configuration in the fourth embodiment of the invention;
Fig. 8 is the structure of the front lighting unit that uses in the touch panel device of irradiation before the configuration of fifth embodiment of the invention and the sectional view on surface;
Fig. 9 is the structure of the front lighting unit that uses in the touch panel device of irradiation before the configuration of sixth embodiment of the invention and the sectional view on surface;
Figure 10 is the structure of the front lighting unit that uses in the touch panel device of irradiation before the configuration of seventh embodiment of the invention and the sectional view on surface;
Figure 11 is the structure of the front lighting unit that uses in the touch panel device of irradiation before the configuration of eighth embodiment of the invention and the sectional view on surface;
Figure 12 is the structure of the front lighting unit that uses in the touch panel device of irradiation before the configuration of ninth embodiment of the invention and the sectional view on surface;
Figure 13 is the structural section figure of traditional preceding illuminating apparatus;
Figure 14 is traditional preceding illuminating apparatus and bonding synoptic diagram of touch-screen;
Figure 15 is the touch panel device sectional view according to irradiation before the configuration of tenth embodiment of the invention;
Figure 16 is the touch panel device concrete structure sectional view of the preceding irradiation of configuration of eleventh embodiment of the invention;
Figure 17 and 18 is light guide plate two example partial enlarged views of the touch panel device of irradiation before the configuration shown in Figure 16;
Figure 19 is the concrete structure sectional view that the touch panel device of the preceding irradiation of configuration of eleventh embodiment of the invention is retrofited.
Illustrated before present invention is described that identical part is with identical label in whole accompanying drawing.
Fig. 1 is the sectional view with portable electric appts 1 of the touch panel device of the preceding irradiation of configuration in the first embodiment of the invention.Fig. 2 is the instantiation skeleton view of the touch panel device combination portable electric appts 1A wherein of the preceding irradiation of configuration in the first embodiment of the invention.Fig. 3 is another instantiation skeleton view of the touch panel device combination portable electric appts 1A wherein of the preceding irradiation of configuration in the first embodiment of the invention.Fig. 4 is the touch panel device concrete structure sectional view of the preceding irradiation of configuration among first embodiment.
Fig. 5-7 is respectively the touch panel device sectional view of irradiation before the configuration of second to the 4th embodiment according to the present invention.
Before the configuration of Fig. 8-12 expression the 5th to the 9th embodiment near the touch panel device of irradiation and the sectional view of front lighting unit structure according to the present invention.
Figure 15 represents according near the touch panel device of irradiation before the configuration of tenth embodiment of the invention and the sectional view of front lighting unit structure.
Figure 16-19 expression is according near the touch panel device of irradiation before the configuration of eleventh embodiment of the invention and the sectional view of front lighting unit structure.
In Fig. 1-12 and Figure 15-19, label 1 to 15 is represented respectively: 1, and 1A, 1B are portable electric appts; 3 is a rectangular light guide plate; 4 is light source; 5 is rectangular reflection type LCD; 6 is the rectangular reflection plate; 7 is the rectangle liquid-crystal display section; 8 (8A, 8B, 8C, 8D and 8E) are light scattering layer; 9 is the rectangle electric pole plate; 10 is adhesion layer; 11,11A, 11B are the rectangle lower electrode plate; 12 is transparent resin layer; 13 is the rectangle supporter; 14 are the rectangular touch screen; 15 is reflection LCD lighting device (front lighting unit).
As shown in Figure 1, the touch panel device of irradiation has reflection LCD 5 before the configuration of first embodiment, the front lighting unit 15 and the light source 4 that is arranged on light guide plate 3 end faces that have the thick light guide plate of 0.3-2.0mm 3, and the transparent touch-sensitive panel 14 of arranged in sequence on reflecting plate 6.
The touch panel device of irradiation is applied in the portable electric appts 1 that disposes reflection LCD 5 and transparent touch-sensitive panel 14 before the above-mentioned configuration, this electronic equipment is a wireless phone for example, mobile phone, scientific calculator, notebook personal computer, PDA (personal digital assistant), (referring to Fig. 2-3) such as digital camera, video camera, business application communication apparatus.
Shown in Fig. 2 is the instantiation skeleton view of a portable electric appts 1.Portable electric appts 1 is realized input function by transparent touch-sensitive panel 14, and transparent touch-sensitive panel 14 is pen-based input devices that are arranged on topmost position, display part.Another concrete portable electric appts 1 also has the keyboard as input media except having one at the transparent touch-sensitive panel 14 of display surface as input media among Fig. 3.
Transparent touch-sensitive panel 14 can be a kind of so-called resistor-type structure.Resistive type transparent touch-sensitive panel 14 as shown in Figure 4, is made up of sandwich construction, comprising: the lower electrode plate 11A of dielectric base, as glass plate or analog; The bottom electrode of nesa coating and the point battle array polygon in a plane and circular spacer are arranged on a surface; Around battery lead plate, pass through the electric pole plate 9 of the dielectric base of dot matrix spacer and adhesion layer 10, as have the flexible film of the top electrode of nesa coating.Surface from transparent touch-sensitive panel 14 is pushed in a side part of input face makes top electrode contact with bottom electrode, thereby realizes that interelectrode conduction is importing.Transparent touch-sensitive panel 14 also can use capacitor type, optical type etc.
Before the configuration touch panel device of irradiation be the reflection extraneous light and from reflecting plate 6, the reflection LCD 5 of the light of front lighting unit 15, comprise light guide plate 3 and be arranged on the front lighting unit 15 of light source 4 of 3 one ends of light guide plate and the composition (referring to Fig. 4) of transparent touch-sensitive panel 14 etc.
In a second embodiment, the lower electrode plate 11A of transparent touch-sensitive panel 14 can be the flexible film 11B that has electrode, is similar to electric pole plate 9 (referring to Fig. 5).This is called film-type, and its advantage is to have alleviated weight because of replacing glass to do bottom electrode with flexible film, and has avoided transparent touch-sensitive panel 14 to be easy to break.In common use, for the film-type transparent touch-sensitive panel 4 of rigidity is provided, under lower electrode plate 11B, link the transparent resin plate that forms by acrylate and polycarbonate or similar transparent resin as supporter 13.
In the 3rd embodiment, the transparent touch-sensitive panel with glass lower electrode plate 11A and front lighting unit 15 14 with structure shown in Figure 4 is by bonding (referring to Fig. 6) such as the transparent transparent resin layer 12 that adheres to certainly, clear gels.
In the 4th embodiment, on film-type transparent touch-sensitive panel 14, have in the situation by the electroded film formed lower electrode plate 11B that is similar to electric pole plate 9, can save supporter, transparent touch-sensitive panel 14 can directly be attached to front lighting unit 15 (referring to Fig. 7) by transparent resin layer 12.In this structure, the light guide plate 3 of front lighting unit 15 is also served as the supporter 13 of the lower electrode plate 11B of transparent touch-sensitive panel 14, makes that the air layer between the supporter 13 and light guide plate 3 is removed in Fig. 5 structure.The optical transmission rate improves thus.Because the soft structure of film-type transparent touch-sensitive panel 14 is easy to carry out the binding of transparent touch-sensitive panel 14 and light guide plate 3.
In each embodiment, the extraneous light that enters from the transparent touch-sensitive panel 14 of top side is by the light guide plate 3 and the reflective liquid crystal display board 5 of front lighting unit 15,6 places are reflected at reflecting plate, are projected onto the external world by reflective liquid crystal display board 5, light guide plate 3 and transparent touch-sensitive panel 14 again.Because extraneous light is by each part twice of display part, so compare with transmission type lcd device, the optical transmission rate reduces in the reflection LCD 5.Therefore, delete two-layerly, promptly air layer and supporter 13 are very important to improve light transmission.Air layer and light guide plate 3 and lower electrode plate 11A, 11B have very big difference on refractive index, this causes light in the reflection at air layer and place, other bed interface very big loss to be arranged.
For example, when transparent propene aldehyde plate when the transparent light guide plate, because the surface reflection that the difference of the refractive index between acryl aldehyde plate and the air layer causes will cause being similar to 7% loss.To good effect be arranged to improving light transmission so omit air layer.The loss of 7% in the above-mentioned example can reduce.
Below front lighting unit 15 will be described.
This structure that light guide plate 3 is stacked on the reflection LCD 5 needs light guide plate 3 to have sufficient light transmission, does not hinder the visibility of LCD.
The thin rectangular plate that is formed by transparent resin can be used as light guide plate 3.Transparent resin is meant the resin with higher transparency and photoconductivity, as the fine styrene copolymerized resin of propylene, cellulose acetate, propionic acid cellulose ester, polymethylpentene resin, polycarbonate resin, polystyrene resin or vibrin etc.
In above-mentioned first embodiment, because transparent touch-sensitive panel is placed on top, if so distance between the upper and lower surface of light guide plate 3, being light guide plate 3 will produce parallax when the surface of reflection LCD 5 one sides and the distance of light guide plate between the surface of transparent touch-sensitive panel 14 1 sides are too big, cause the displacement between display position and the input position.Be arranged to for a short time when the 0.3-2.0mm when the thickness of light guide plate 3, light guide plate 3 will maintain in the surface of reflection LCD 5 one sides and the distance of light guide plate between the surface of transparent touch-sensitive panel 14 1 sides and be not more than 3.0mm.The thickness of light guide plate 3 is preferably in 0.3-1.5mm.When the thickness of light guide plate during less than 0.3mm, light guide plate 3 is difficult to make, and an end face part of the light guide plate 3 that can not be positioned at from light source 4 obtains sufficient light quantity.When the thickness of light guide plate surpassed 2.0mm, the weight of front lighting unit 15 and thickness increased, and have lost portability.Light guide plate 3 can be made except that the shapes such as wedge shape uniform thickness plate shaped.
Make in the situation of mirror status in the upper and lower surface of light guide plate 3, incident light incides on the incident end face opposing end faces with light guide plate 3, repeats total reflection simultaneously on both ends of the surface.Consequently almost arrive front portion, i.e. incident end face and opposing end faces without any ray cast.In order to address this problem, on the face of light guide plate 3, light scattering layer 8 is set at least facing to reflection LCD 5 or display surface one side, make that the light in the light guide plate 3 passes to reflection LCD 5.When the light guide plate with scattering layer 83 that constitutes thus was stacked on the reflection LCD 5, reflection LCD 5 was thrown light on fully.The light that sends from light source 4 continues to the incident end face opposing end faces with light guide plate 3, and entire emission type LCD 5 is illuminated in the total reflection that experience repeats in light guide plate 3 simultaneously.
The light scattering layer 8 of light guide plate 3 needs the visuality to the sufficient light transmission of extraneous light and don't obstruction LCD.Therefore, be suitable for supposing that light scattering layer 8 has a meticulous shape, gradual change pattern specifically, the form of particle, prism shape etc.
The gradual change dot matrix that forms by serigraphy is generally light scattering layer 8 employings of carrying on the back the irradiation type.Gradual change dot matrix in this case has the diameter that is not less than 300 μ m, and adds pigment with the enhanced light scattering performance.If the light scattering layer 8 of Xing Chenging is directly used in front lighting unit 15 thus, then when using with extraneous light and opening front lighting unit 15, liquid-crystal display section 7 is occupied by very a high proportion of dot matrix, and visual decline.
Then, according to a fifth embodiment of the invention, light scattering layer 8 specific designs that are used in the front lighting unit in the touch panel device that disposes preceding irradiation are as follows.For example, utilize ink to form dot matrix gradual change image, the principal ingredient of ink has a kind of transparent or semitransparent resin, and the refractive index of resin is higher than the refractive index of light guide plate 3 facing to the surface of reflection LCD 5 one sides, constitutes a light scattering layer 8A thus.Light guide plate 3 is positioned at another surface of display surface one side and makes a minute surface (referring to Fig. 8).The area ratio that the diameter of each point in the light scattering layer 8A gradual change dot matrix is arranged to be not more than 200 μ m and dot matrix is not more than 60%, and the visuality of reflection LCD 5 strengthens thus.The light that enters light guide plate 3 inside repeats total reflection in the inboard, passes to the end face facing to light guide plate 3 incident end faces.This light throws from the dot matrix of the light scattering layer 8A of reflection LCD 5 one sides that are formed on light guide plate 3, shines reflection LCD 5 then.Project gradual change that light quantity on the light scattering layer 8A can be by regulating light scattering layer 8A than regulating, and so can shine reflection LCD 5 equably.
Before being used in the front lighting unit of the touch panel device of irradiation according to the configuration of sixth embodiment of the invention, dot matrix gradual change pattern can be formed on the surface that light guide plate is positioned at display surface one side, use the point of ink to have and identical diameter and the area identical ratio of point in the foregoing description, be higher than the transparent or semitransparent resin of light guide plate 3 and comprise the pigment of scattered light but the principal ingredient of ink is a refractive index, constitute light scattering layer 8B (referring to Fig. 9) thus.In this case, the light that enters light guide plate 3 is formed on dot matrix reflection and the scattering and project a side surface of reflection LCD 5 brokenly among the light scattering layer 8B of display surface one side of light guide plate 3, and reflection LCD 5 thus throws light on.Owing to the scattering pigment in the ink that is blended in light scattering layer 8B, light is more effectively throwed.The amount of the light that is throwed at light scattering layer 8B can be by regulating course 8B gradual change than regulating, make that reflection LCD 5 is shone equably.
Printing process such as intaglio, serigraphy can be used for forming above-mentioned dot matrix gradual change pattern.The preferred use transmitted and molded method simultaneously, because can form dot matrix gradual change image simultaneously when light guide plate 3 is molded.Specifically, transmission and molded method are to remain in the mold having the conductive material that is formed on on-chip conducting stratum simultaneously, inject resin and fill mold and cooling again, obtain a resin cast thus and simultaneously conductive material is bonded to mould surface, separate substrates then, thus conducting stratum is delivered to the body surface that will be transmitted.
Can with fine grain form light scattering layer 8D be set on the face of display surface one side of light guide plate 3 according to the front lighting unit in the touch panel device of irradiation before the configuration of seventh embodiment of the invention, the thickness degree of particle is with not obvious decay display of visually be as the criterion (referring to Figure 10).The particle form of the light scattering layer 8D of light guide plate 3 is by forming particle form and generation particle when light guide plate 3 is molded at the inside surface of mold.Or, the meticulous grinding step that is approximately 30 μ m diameters is carried out to form light scattering layer 8D in the surface of light guide plate 3.The light that enters from the end face of light guide plate 3 is scattered in the inboard of light guide plate 3 because of particle form and the rough surface of light scattering layer 8D, and part light is projected onto reflection LCD 5.
Can be in light guide plate 3 facing to forming a plurality of prisms with the form of the incident end face that is parallel to light guide plate 3 on the face of reflection LCD 5 one sides as light scattering layer 8E, and according to the front lighting unit in the touch panel device of irradiation before the configuration of eighth embodiment of the invention the same (referring to Figure 11).The light that incides on the light guide plate 3 shines reflection LCD 5 through the prism facets of light scattering layer 8E.The prism of light scattering layer 8E for example is equilateral triangle, lens shape etc.The prism of light scattering layer 8E size and spacing with the proportional variation of the distance of incident end face, control the output balance of light scattering layer 8E thus.For influence is not visual negatively, the prism of light scattering layer 8E preferably forms with the spacing of 30-500 μ m and the fabric width of 30-100 μ m.
According to each embodiment of the present invention, light scattering layer 8 can be formed by the transparent or semitransparent resin that refractive index is higher than light guide plate 3.
Specifically, can light scattering layer 8C be set in display surface one side of light guide plate 3 according to the front lighting unit in the touch panel device of irradiation before the configuration of ninth embodiment of the invention, light scattering layer 8C makes (referring to Figure 12) by the transparent resin that refractive index is higher than the refractive index of light guide plate 3.The light that enters light guide plate 3 reflects because of the refringence between the two at the interface of light guide plate 3 and light scattering layer 8C, and further projects air layer, and finally shines reflection LCD 5.In this structure, because there is not dot matrix etc. on the leading flank of light guide plate 3, the visuality of reflection LCD 5 is influenced hardly.
The cathode-ray tube (CRT) that uses can be a linear, or the cross-over connection two sides is L shaped, or extends to the U-shaped pipe of three adjacent sides.
Shown in Fig. 4-7, reverberator 49 can be installed, the light that sends from light source 4 is focused on effectively the incident end face of light guide plate 3.Reverberator 49 is preferably obtained by a kind of sheet metal, and this sheet metal has the material surface of special reflection ray, for example be a kind of have by vapor deposition or sputter applied silver, aluminium, platinum, nickel or chromium, the element of coatings such as silver, aluminium especially.Light scattering reflecting plate 6 or the light-diffusing films with light scattering characteristic also can utilize, and light-diffusing films is by resin and light-scattering material such as TiO such as blending polyester
2, BaSO
4Or SiO
2, or polyester foamed and have light scattering characteristic.
As mentioned above, because front lighting unit 15 and transparent touch-sensitive panel 14 combine by transparent resin layer 12, so transmissivity increases.When using the transparent touch-sensitive panel 14 of film shape, can remove supporter 13, install thus and further simplified and the transmissivity increase.
Provide a kind of front lighting unit that disposes the touch panel device of preceding irradiation according to tenth embodiment of the invention below, this front lighting unit can shine reflection LCD fully and not reduce transmissivity, has eliminated following inconvenience.
That is, need be when using from the frontside illuminated reflection LCD at the environment that can not guarantee sufficient light quantity such as in indoor or night etc.For this reason, propose a kind of facility, flat illumination (preceding irradiation) is set at the front surface of reflection LCD, thus environment for use light and preceding irradiation (SID 95 Digest for example, the 375th page, C.Y.Tai, H.Zou, P.K.Tai).Front lighting unit has a light source that is arranged on 103 1 end faces of light guide plate of transparent resin, as cold cathode fluorescent tube etc., is formed on prism or kick and depression 108 (referring to Figure 13) on light guide plate 103 front surfaces in addition.The light that obtains from end face part of light guide plate 103 inwardly conducts simultaneously and repeats total reflection in the inboard of light guide plate 103.The part of light is reflected with an angle by projection and depression 108, and light beam is invested reflection LCD one side of light guide plate 103 at an easy rate thus, and penetrates from light guide plate 103, thus the irradiation reflection LCD.
In a lot of traditional portable electric appts, transparent touch-sensitive panel is arranged on the front surface of transmission type lcd device to provide from the function of the surface input of LCD.Transparent touch-sensitive panel comprises power on a pole piece 109 and a bottom electrode sheet 111, the pole piece that powers on has a top electrode that is positioned at the nesa coating on the membranaceous dielectric base lower surface, and the bottom electrode sheet has a bottom electrode that is positioned at the nesa coating on sheet or the membranaceous dielectric base upper surface.Power on pole piece 109 and bottom electrode sheet 111 is arranged through the air layer between the electrode and faces with each other.From the part that the plane of incidence is pushed display board, make two electrodes contact also electrical ties each other, thereby can import.In a kind of proposal (for example Japan treats publication application No.61-131314), touch-screen is bonded to transmission type lcd device by one from adhesion layer or recovery sheet, even because if between transparent touch-sensitive panel and transmission type lcd device, there is very thin air layer, then will cause at the interface surface reflection and the transmissivity of reducer.
On the other hand, the touch-screen of said structure can not utilize the preceding irradiation as lighting source to be bonded to reflection LCD.Because the microspike of the light guide plate of front lighting unit 103 and depression 108 are designed to utilize at the interface to the reflection of air layer, the part of the light beam that an end face from light guide plate 103 is obtained projects reflection LCD, so the binding of the light guide plate front surface by touch-screen and front lighting unit makes the removal of air layer make microspike and depression 108 to invest reflection LCD (referring to Figure 14) to light beam.
In order to solve above-mentioned inconvenience, as follows according to the front lighting unit structure of the touch panel device of irradiation before the configuration of tenth embodiment of the invention.
Light guide plate 3 can not have microspike and depression 58 at upper surface, as described in Figure 15.Even have microspike and depression 58, also can be removing the transparent touch-sensitive panel of air layer as light guide plate 3 by being attached to transparent touch-sensitive panel 14.Under any circumstance, that partly obtain from end surfaces and the light beam of front surface that arrives light guide plate 3 is by transparent resin layer 12 or restore sheet and enter transparent touch-sensitive panel 43.Enter the front surface of most of light beam of transparent touch-sensitive panel 14, i.e. interface total reflection between bottom electrode and air layer at bottom electrode sheet 11.Light beam repeat at the interface total reflection and the total reflection at light guide plate 3 rear surfaces places in incide incident end face opposing end faces with light guide plate 3.Simultaneously, a part that incides the light beam of transparent touch-sensitive panel 14 be not formed at bottom electrode on bottom electrode sheet 11 dielectric base and the total reflection at the interface between the air layer, because the dielectric base upper surface of bottom electrode sheet 11 is provided with microspike and depression 58, and the shape of kick and depression is made in the interface between bottom electrode and the air layer therefore.The part of this light beam reflects with an angle, thereby is easy to project very much reflection LCD (referring to Figure 15).The touch-screen of irradiation is stacked on the reflection LCD 5 before the configuration of Gou Chenging thus, and therefore reflection LCD is shone fully.
The recess of microspike and depression can form many dolly dimples and constitute by the entire upper surface in bottom electrode sheet 11 dielectric base.Dolly dimple forms with the optional shape that is easy to light beam and projects the angle reflection of reflection LCD can make light beam, as with the taper shape of depression or mortar shape etc.Dolly dimple by dielectric base molded in or afterwards the dielectric base surface is heated and is used the processing of concave, convex roll-in, or the similar approach such as shape that form corresponding to dolly dimple by the surface, chamber that mold inwall or matrix band are determined when dielectric base is a resin plate that is molded in the mold obtain.The diameter 5-40 μ m preferably of depression is with this weakening of visuality of showing sufficient light transmission and avoiding LCD part 7 when touch-screen is used for extraneous light.
Preferably near the area of the small depressions light source 4 than being arranged to less than area ratio away from the small depression in light source 4 places.Area is than changing by size and the spacing that changes depression according to the distance from light source 4.Therefore, can be controlled at equilibrium state to light from microspike and depression 58 projection, realize even illumination reflection LCD 5.
Membranaceous dielectric base with small depression and projection 58 can possess numerous projections by added tiny transparent bead before molded membranaceous dielectric base.Bead is formed by the less resin of difference of the material that is similar to dielectric base or refractive index and dielectric base refractive index, to keep the level of transmittance of dielectric base itself.The bead that the film surface exists can apply or the part exposure fully with the resin that constitutes film.The diameter of bead is preferably in 5-40 μ m guaranteeing when using extraneous light sufficient light transmission being arranged, and does not make the visuality of LCD part 7 poorer.
The projection of microspike and depression 58 can or be printed the ink that comprises small transparent bead by coating and be formed coating.Bead is formed by the less resin or the glass of difference of the material that is similar to dielectric base or refractive index and dielectric base refractive index, to keep the level of transmittance of dielectric base itself.Bead on the coating surface can apply or local the exposure fully with coating.The diameter of bead is preferably in 5-40 μ m obtaining sufficient light transmission when using extraneous light, and avoids the visuality of LCD part 7 to weaken.
The ink coating that comprises transparent bead is preferably formed as one at the dot matrix gradual change pattern of locating to have away from the place of light source 4 greater than near the ratio of the area the light source 4.The size of point and spacing change according to the distance of distance light source 4, thereby change the area ratio of coating.Light projection at microspike and depression 58 places is controlled at equilibrium state thus, makes that reflection LCD 5 is thrown light on equably.Printing process such as intaglio, serigraphy can be used to form the gradual change pattern.The shape of dot matrix is not done special qualification, and Any shape all can adopt as circle, polygon etc.
In the 11 embodiment, as described in Figure 16, for example the light guide plate of being made by propylene 33 has a planar section 33a, with sloping portion 33b, planar section has the surface on another surface that is parallel to touch-screen one side, and sloping portion has the surface parallel to each other that favours on another plane that a side of LCD 5 is provided with.The plane of incidence of light guide plate 33 and described another side meet at right angles.The light beam that enters from the side is facing to other surface of the touch-screen of light guide plate 33 and in the planar section 33a total reflection on another plane of LCD 5 one sides that are parallel to light guide plate 33, and only from sloping portion 33b outgoing, thereby irradiating liquid crystal display 5.The light beam that shines on the LCD 5 reflects through liquid crystal reflecting surface in its lower section, and projects the external world by light guide plate 33 and touch-screen again.Therefore, use the liquid crystal indicator of reflective liquid crystal display board even in the environment that does not have the substantial light photograph, also can be identified.
The face place that Figure 17 and 18 is illustrated in the light guide plate 33 of LCD panel one side shown in Figure 16 is parallel to other surperficial planar section 33a and the sloping portion 33b that favours other face.
Angle α between Figure 17 midplane part 33a and the sloping portion 33b is 90 °.In this case, suppose that the angle of incident light arrival sloping portion 33b is identical with the angle that arrives the plane of incidence, and therefore all project the outside of light guide plate 33.
In Figure 18, the angle [alpha] of 33a and 33b part is arranged to greater than 90 ° less than 180 °.Suppose the height on sloping portion 33b plane, promptly equate that the area of Figure 18 medium dip part 33b is bigger among the thickness t of sloping portion 33b and Figure 17 and Figure 18, make the light quantity of each sloping portion 33b outgoing from Figure 18 greater than the situation among Figure 17.
The angle of determining between the surface of the light source 4 place end faces of light guide plate 33 and light guide plate 33 touch-screens one side is preferably between 88-92 °, angle between the inclined-plane of the plane of planar section 33a and sloping portion 33b is not less than above-mentioned angle and less than 180 °, wherein sloping portion 33b with LCD 5 one side surfaces on the opposite direction adjacent plane part 33a of the plane of incidence of light guide plate 33.
But in the molded of light guide plate 33 and cutting, because the degree of accuracy of technology, not always 90 ° of the angles between the other surface of the plane of incidence and touch-screen one side.The degree of accuracy scope of angle is within ± 2 ° in the at present molded and cutting technique.Consider angle, need light that the incident angle as the side of the plane of incidence is not more than 44 °, thereby the light total reflection that the plane of incidence from another surface is entered, wherein another surface is facing to the touch-screen of light guide plate 33 and the light guide plate 33 planar section 33a in a surface of LCD panel one side.This moment, the refractive index of light guide plate 33 was not less than 1.44.
For from sloping portion 33b outgoing incident light, need the angle α between planar section 33a and the sloping portion 33b to be in 90-180 °, wherein planar section 33a has other surperficial plane that is parallel to facing to touch-screen, and touch-screen is positioned on other surface facing to the light guide plate 33 of LCD panel 5, and sloping portion 33b is at the contiguous above-mentioned planar section 33a of the direction opposite with the plane of incidence.When this angle was 90 °, sloping portion 33b became the side that is parallel to as the plane of incidence.
Though the distance between planar section 33a and the sloping portion 33b continues to keep evenly on a surface of LCD 5 one sides in light guide plate 33, can launch with homogenize light according to the position change distance of light source.
As the remodeling of the 11 embodiment, the hyporeflexia that light guide plate 33 is carried out on the surface of LCD 5 one sides is handled the transmissivity that has improved the touch panel device of irradiation before the whole configuration.
In a kind of mode that hyporeflexia is handled, by for example directly process and form a refractive index be lower than light guide plate 33 resin surface the material film and on a surface of LCD 5 one sides, form the hyaline layer 34 that refractive index is lower than light guide plate 33 in light guide plate 33.When using dead matter, as MgF
2(refractive index is 1.38) or metal fluoride, SiO
2When (refractive index 1.46) or metal oxide, can use as the vacuum vapor deposition method and process.When using organic substance, stripped polymerization process fluorine monomer such as use, form the hyaline layer 34 of film thus at resin surface.Drip coating method etc. and also can be used to process organic substance.
Perhaps one have refractive index be lower than light guide plate 33 hyaline layer 34 film by utilize refractive index and equal or be not more than light guide plate and refractive index equals or the transparent autoadhesion agent that is not less than film is adhered to light guide plate 33 on a face of LCD 5 one sides, constitute the low-index layer 34 at air layer interface thus.
Specifically, referring to Figure 19, has hyaline layer 34 facing on the surface of LCD 5 one sides in light guide plate 33.Hyaline layer 34 has less than light guide plate 33 and greater than the refractive index of air layer.Light guide plate 33 is formed by acryl resin, and hyaline layer 34 is coated with formation by dripping of fluoride monomer.The surface reflection in light guide plate 33 another surfaces that is caused by the air layer interface that exists causes transmissivity to reduce.Therefore, the processing of resin bed 34 to reduce to reflect is set, reduces reflection at the interface thus and improve transmissivity.
Can be applied to this hyaline layer 3 on each light guide plate 3 in the previous embodiment to obtain same effect.
According to this structure, because removed to be present in traditionally and had touch-screen and the touch-screen of front lighting unit combination device wherein and the air layer between the light conductor, so avoided the light loss that causes owing at the interface reflection between air layer and the touch-screen lower surface and between air layer and the light guide plate upper surface, therefore improved the transmissivity of whole device.In addition, because the bottom electrode sheet of touch-screen has the face of light scattering function in the interface configurations of air layer, so light can send from front lighting unit effectively.
As mentioned above, in the portable electric appts structure that is arranged in the display part by reflection LCD as display part, front lighting unit and touch-screen, wherein the upper surface of the lower surface of transparent touch-sensitive panel and front lighting unit light guide plate bonds from adhesion layer by transparent, be positioned at the light scattering function that realizes being arranged at traditionally the light guide plate surface on the face of liquid crystal display one side in the light guide plate of front lighting unit, make the transmissivity of whole device improve.Front lighting unit projection light and do not have visual loss effectively when being used for daytime.
[example 1]
Poly terephthalic acid diethyl alcohol ester film remains in the injection mo(u)lding mold regularly, has no photopolymer resin in the poly terephthalic acid diethyl alcohol ester, forms the fine pattern of projection and depression thus on its surface.Block after the mold, transparent acryl resin is injected wherein.After opening mold poly terephthalic acid diethyl alcohol ester and mold goods are separated.
In this mode, obtain the thick rectangle transparent propene plate of 1.5mm as light guide plate.Light guide plate has a light scattering layer, is irregularly formed fine protrusions and the depression of approximate 30 μ m on a face of scattering layer.The another side of light guide plate is a minute surface.
Diameter is that the cold cathode fluorescent tube of 2mm is arranged in a longer sides of light guide plate as line source.Be not provided with at cold cathode fluorescent tube and a kind ofly have the reflectance coating of silver-colored vapor deposition face as reverberation facing to the periphery of light guide plate.In addition, the poly terephthalic acid diethyl alcohol ester reflectance coating of white foaming is bonded to an end face facing to incident end face of light guide plate by pressure-sensitive adhesion double-coated band.
There is the substrate of glass of conducting film ITO (tin indium oxide) on the surface as lower electrode plate, and there is the electric pole plate of the poly terephthalic acid diethyl alcohol ester of conducting film ITO as transparent touch-sensitive panel on the surface.The upper surface of light guide plate is by with thickness being the clear gel of the acryl resin of 0.2mm is attached to touch-screen as the clear, viscous resin bed downside.
The touch panel device of irradiation is arranged to be parallel to above-mentioned liquid crystal board before the configuration of said structure.The light scattering layer of light guide plate is arranged in a side relative with liquid crystal board, and reflecting plate is placed under the liquid crystal board.
The light that incides light guide plate from light source is by tiny pitted skin scattering and project liquid crystal board and irradiating liquid crystal display board again.By the baffle reflection of illumination light under liquid crystal board of liquid crystal layer,, and project the external world by light guide plate more again by liquid crystal layer.
In said structure, liquid-crystal display section has sufficient visuality when the front lighting unit opening and closing.
[example 2]
Light guide plate constitutes by the mode identical with example 1.
The lower electrode plate of transparent touch-sensitive panel and electric pole plate are by forming as surperficial separately poly terephthalic acid diethyl alcohol ester with the ITO conducting film.The upper surface of light guide plate is by with thickness being the transparent adhesion layer of the acryl resin of 50 μ m is attached to touch-screen as transparent resin layer downside.The light guide plate of the front lighting unit of this structure also is used to support transparent touch-sensitive panel.
The liquid-crystal display section of the touch panel device of irradiation demonstrates sufficient visuality before the configuration that obtains when the front lighting unit opening and closing.Because the light guide plate of front lighting unit is as supporter, having removed needs the supporter of support film type transparent touch-sensitive panel usually, so simplify the structure.In addition, the minimizing of part count also helps the raising of transmissivity.
Structure of the present invention is as above operated as follows.
Before configuration according to the present invention, in the touch panel device of irradiation, on reflecting plate, stack gradually reflection LCD, comprising thick transparent light guide plate of 0.3-2mm and the front lighting unit that is arranged on the light source on the light guide plate end face, and transparent touch-sensitive panel.The thickness of front lighting unit is reduced, and therefore can not increase the size and the weight of portable electric appts, can not weaken the portability of portable electric appts.Because light source is received within the main body of portable electric appts, so do not lack protection to light source.
Front lighting unit is in a kind of state stacked with reflection LCD.Avoided front lighting unit to break in use thus.The stocking mechanism that stores front lighting unit in time spent not also is removed.
Though be to get in touch preferred embodiment with reference to the accompanying drawings present invention is described, should know that for a person skilled in the art various variations and remodeling are conspicuous.These variations and remodeling are included within the scope of the present invention that claim limits.
Claims (18)
1. the touch panel device of the preceding irradiation of configuration comprises: a reflection LCD (5); A front lighting unit that comprises transparent light guide plate (3) and be arranged on the light source (4) on end face of light guide plate; With a transparent touch-sensitive panel (14), they stack gradually on reflecting plate (6).
2. the touch panel device of irradiation is characterized in that transparent touch-sensitive panel (14) is the resistor-type transparent touch-sensitive panel before the configuration according to claim 1, has the top that is bonded to the front lighting unit of transparent touch-sensitive panel bottom by transparent resin layer (12).
3. the touch panel device of irradiation is characterized in that transparent touch-sensitive panel (14) is a resistance type thin film class transparent touch-sensitive panel before the configuration according to claim 1, and the top of front lighting unit and the bottom of transparent touch-sensitive panel are by transparent resin layer (12) bonding.
4. according to the touch panel device of irradiation before any one described configuration among the claim 1-3, it is characterized in that having on the light guide plate and use ink to be formed at least one surperficial upward, small polygon or circular dot matrix gradual change pattern, the size of point is not more than 200 μ m, the area ratio is not more than 60%, and the principal ingredient of ink is the transparent or semitransparent resin that refractive index is higher than light guide plate.
5. the touch panel device of irradiation before the configuration according to claim 4, it is characterized in that having on the light guide plate (3) the dot matrix gradual change pattern that utilizes ink to form, the principal ingredient of ink is the transparent or semitransparent resin that refractive index is higher than light guide plate, but also comprises the pigment of scattered light.
6. according to the touch panel device of irradiation before any one described configuration among the claim 1-3, it is characterized in that a side of light guide plate (3) is made of the transparent or semitransparent resin that refractive index is higher than light guide plate at least.
7. according to the touch panel device of irradiation before any one described configuration among the claim 1-6, it is characterized in that a side of light guide plate (3) is formed with the fine-grannular pattern at least.
8. according to the touch panel device of irradiation before any one described configuration among the claim 1-6, it is characterized in that at least being formed with a plurality of prisms in the face of a side of reflection LCD in light guide plate (3), prism is formed on the light guide plate with the spacing of 30-500 μ m and the fabric width of 30-100 μ m, is parallel to an incident end face of display.
9. according to the touch panel device of irradiation before any one described configuration among the claim 1-8,
It is characterized in that transparent touch-sensitive panel comprises: the pole piece that powers on has the top electrode on the lower surface that is formed on membranaceous dielectric base on the pole piece that powers on; With a bottom electrode sheet, be formed on the bottom electrode on the upper surface with small projection and the membranaceous or sheet dielectric base of depression on the bottom electrode sheet, wherein power on pole piece and bottom electrode sheet by the air layer between the electrode face with each other arrange and
Wherein, light guide plate is adhered to the rear surface of transparent touch-sensitive panel by transparent resin layer, and transparent touch-sensitive panel and front lighting unit are become one.
10. the touch panel device of irradiation is characterized in that the recess of microspike and depression is made of the many small depression on the dielectric base entire upper surface before the configuration according to claim 9.
11. the touch panel device of irradiation before the configuration according to claim 10 is characterized in that area away from the small depression of light source is than the area ratio greater than near the small depression light source.
12. according to the touch panel device of irradiation before any one described configuration among the claim 9-11, the membranaceous dielectric base that it is characterized in that having microspike and depression has and a plurality ofly is molded in the microspike that forms in the resin by transparent small bead.
13. according to the touch panel device of irradiation before any one described configuration among the claim 9-11, the projection in it is characterized in that microspike and caving in comprises small transparent bead by coating and printing and is formed in the coating.
14. the touch panel device of irradiation is characterized in that coating is formed in the dot matrix gradual change pattern before the configuration according to claim 13, this pattern compares greater than near the ratio of the area the light source at the area away from the light source place.
15. the touch panel device according to irradiation before any one described configuration among the claim 1-14 is characterized in that light guide plate comprises: a plane that is positioned at touch-screen one side; With the planar section with plane (33a) that is positioned at LCD one side with have the sloping portion (33b) of inclined surface, the light beam that enters from light guide plate one side reflects on the plane of planar section, enter light guide plate inside, light beam throws to the outside from the inclined surface of sloping portion.
16. the touch panel device of irradiation before the configuration according to claim 15, it is characterized in that by the light source place end face of light guide plate and to be in the angle that forms between the light guide plate surface of touch-screen one side be 88-92 °, angle between the plane of planar section and the dip plane of sloping portion is not less than above-mentioned angle and less than 180 °, wherein sloping portion with LCD one side surface on the reverse direction adjacent plane part of the light guide plate plane of incidence.
17., also be included on the surface of light guide plate of LCD one side and form the hyaline layer (34) of a refractive index less than light guide plate according to the touch panel device of irradiation before any one described configuration among the claim 1-16.
18., it is characterized in that light guide plate has the thickness of 0.3-2.0mm according to the touch panel device of irradiation before any one described configuration among the claim 1-17.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15182998A JPH11344695A (en) | 1998-06-02 | 1998-06-02 | Front light integrated touch panel |
| JP151829/1998 | 1998-06-02 | ||
| JP338566/1998 | 1998-11-30 | ||
| JP33856698A JP3003931B1 (en) | 1998-11-30 | 1998-11-30 | Front light integrated transparent touch panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1272922A true CN1272922A (en) | 2000-11-08 |
Family
ID=26480941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99800884A Pending CN1272922A (en) | 1998-06-02 | 1999-06-01 | Touch screen device with front lighting |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1000382A1 (en) |
| KR (1) | KR100398755B1 (en) |
| CN (1) | CN1272922A (en) |
| MY (1) | MY130221A (en) |
| TW (1) | TW412646B (en) |
| WO (1) | WO1999063394A1 (en) |
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| CN1303508C (en) * | 2001-11-09 | 2007-03-07 | 美蓓亚株式会社 | Touch panel assembly |
| US7388577B2 (en) | 2002-08-13 | 2008-06-17 | Fujitsu Siemens Computers Gmbh | Display apparatus with a touch-sensitive layer and an antireflection lattice |
| CN100395628C (en) * | 2003-05-10 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| US7777954B2 (en) | 2007-01-30 | 2010-08-17 | Qualcomm Mems Technologies, Inc. | Systems and methods of providing a light guiding layer |
| CN102016698A (en) * | 2008-05-08 | 2011-04-13 | 皇家飞利浦电子股份有限公司 | Lighting device |
| CN101310351B (en) * | 2006-01-20 | 2011-04-13 | 日本写真印刷株式会社 | Capacitive light emitting switch and light emitting switch element used therefor |
| WO2011057572A1 (en) * | 2009-11-12 | 2011-05-19 | 北京汇冠新技术股份有限公司 | Touch screen, touch system and light source |
| US7947915B2 (en) | 2007-03-29 | 2011-05-24 | Samsung Electronics Co., Ltd. | Keypad assembly |
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- 1999-06-01 WO PCT/JP1999/002916 patent/WO1999063394A1/en not_active Application Discontinuation
- 1999-06-01 CN CN99800884A patent/CN1272922A/en active Pending
- 1999-06-01 EP EP99922623A patent/EP1000382A1/en not_active Withdrawn
- 1999-06-01 MY MYPI99002161A patent/MY130221A/en unknown
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Also Published As
| Publication number | Publication date |
|---|---|
| TW412646B (en) | 2000-11-21 |
| WO1999063394A1 (en) | 1999-12-09 |
| KR100398755B1 (en) | 2003-09-19 |
| EP1000382A1 (en) | 2000-05-17 |
| KR20010022536A (en) | 2001-03-15 |
| MY130221A (en) | 2007-06-29 |
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