CN106646980A - Infrared transmitting backlight module touch screen - Google Patents
Infrared transmitting backlight module touch screen Download PDFInfo
- Publication number
- CN106646980A CN106646980A CN201710115317.3A CN201710115317A CN106646980A CN 106646980 A CN106646980 A CN 106646980A CN 201710115317 A CN201710115317 A CN 201710115317A CN 106646980 A CN106646980 A CN 106646980A
- Authority
- CN
- China
- Prior art keywords
- light guide
- guide plate
- backlight
- touch
- infrared
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
-
- 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
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- 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
- G06F3/0412—Digitisers structurally integrated in a display
-
- 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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
Abstract
The invention discloses a backlight module touch screen. The backlight module touch screen comprises a backlight diffusion film arranged on the back of liquid crystal glass, wherein an elastic support is arranged between the backlight diffusion film and a light guide plate, a light source generating device is arranged on each of two sides of the light guide plate, a reflective plate is arranged on the other side of the light guide plate opposite to the elastic support, the elastic support is composed of a plurality of parallel springs, one end of the spring abuts against the backlight diffusion film, the other end of the spring abuts against the light guide plate, touch glass is arranged on the other side of the liquid crystal glass opposite to the backlight diffusion film, and at least one beeline infrared laser head is installed on the other side of the touch glass opposite to the liquid crystal glass. The backlight module touch screen does not use a prism, and can obtain a unique backlight effect when the light attenuation of infrared is relatively low.
Description
Technical field
The present invention relates to multimedia technical field of touch control, relates more specifically to a kind of infrared backlight module touch-screen.
Background technology
Traditional multi-point touch-control panel simple structure, it is easily achieved.And with being arranged in infrared word laser head on screen
Quantity increases, and its touch accuracy can also improve.
Because the desktop in multi-point touch-control panel can not install the radiator of enough power, cannot just penetrate liquid-crystalline glasses and enter
Row touch-control catches, can only the very poor projection of using effect carry out regarding aobvious.
Even if arranging after radiator with a wordline infrared laser head, liquid crystal can cannot be passed through efficiently against speck
The problem of glass.But, after through liquid-crystalline glasses, the prism being placed in after liquid-crystalline glasses can cause certain to speck to infrared ray
Decay, affects motion capture of the infrared camera to speck.
The content of the invention
The purpose of the present invention is to overcome or slow down the part at least the above shortcoming, and a kind of infrared backlight is provided hereby
Module touch-screen, including the backlight diffusion barrier being placed in after liquid-crystalline glasses, between the backlight diffusion barrier and light guide plate elasticity is provided with
Supporter, the another side that the both sides of the light guide plate have light source generator part, the light guide plate relative resilient supporter sets
There is reflecting plate, the elastic support is made up of several parallel springs, one end of the spring contradicts backlight diffusion barrier, separately
One end contradicts light guide plate, and the liquid-crystalline glasses are provided with touch-control glass with respect to the another side of backlight diffusion barrier, in the touch-control glass
Glass is provided with least one 1 wordline infrared laser heads with respect to the another side of liquid-crystalline glasses.
In above-mentioned technical proposal, infrared camera is installed between the light guide plate and reflecting plate, it is described infrared to take the photograph
As head connects microprocessor.
It is contemplated that in by increasing light guide plate to the distance of backlight scattering film, to expand the diffusion of backlight entry of backlight
The average angle of incidence of film, is only diffused by backlight diffuser plate to the luminous point of light guide plate, cancels the use of prism, be ensure that
Infrared ray obtains sufficiently uniform backlight effect when light decay is less.
Description of the drawings
These and other aspects of the invention is described more fully now with reference to appended accompanying drawing, it show the present invention
Currently preferred embodiment.Wherein：
Fig. 1 is the side sectional view of the backlight module on touch-screen；
Fig. 2 is the part drawing of touch-screen.
In figure：1st, liquid-crystalline glasses；2nd, backlight diffusion barrier；3rd, elastic support；4th, LED；5th, light guide plate；6th, reflecting plate；7th, it is red
Outer camera；8th, touch-control glass.
Specific embodiment
Below in conjunction with the accompanying drawings and instantiation, the present invention is further elucidated.
The backlight module being related in touch-screen as shown in Figure 1, including the backlight diffusion barrier 2 being placed in after liquid-crystalline glasses 1, the back of the body
Elastic support 3 is provided between optical diffusion film 2 and light guide plate 5, the both sides of light guide plate 5 have light source generator part, the phase of light guide plate 5
Reflecting plate 6 is provided with to the another side of elastic support 3.
Compared to traditional backlight module, elastic support is passed through between the light guide plate 5 and backlight diffusion barrier 2 of the present embodiment
3 intervals form gap, then the light of any point output maximum to be reached on backlight diffusion barrier 2 is incident on light guide plate 5
Angle expands with the distance in the gap and expands.So, backlight entry of backlight diffusion barrier 2 average angle of incidence increase after, only according to
Backrest optical diffusion film 2 can realize effectively diffusion to backlight.
Further such as the saturating infrared backlight module touch-screen of Fig. 2, including touch-control glass 8, touch-control glass 8 and housing (figure
In be not drawn into) it is fixed, in the multiple infrared cameras 7 of the surface layout of touch-control glass 8, form red with the surface in touch-control glass 8
Outerplanar；
Liquid-crystalline glasses 1 are fitted with the inner side of touch-control glass 8, to display image, in the inner side of liquid-crystalline glasses 1 back of the body are pasted with
Optical diffusion film 2, contradicts flexible sponge, between light guide plate 5 and liquid-crystalline glasses 1 between the light guide plate 5 of backlight diffusion barrier 2
Enough gaps are formed, the inner side of light guide plate 5 has reflecting plate 6, and both sides have LED 4, fixed between reflecting plate 6 and light guide plate 5
There is infrared camera 7.
Finger forms obvious speck by Infrared Plane when being placed in touch-control glass 8 by the part that finger is blocked, bright
The IR of spot catches through touch-control glass 8, liquid-crystalline glasses 1 and the back infrared camera 7 of light guide plate 5, and infrared camera 7 will
Catch the image information produced during speck and feed back to microprocessor, microprocessor calculates the place of speck according to image information
Position, and then the operational order of finger is fed back, and shown by liquid-crystalline glasses 1.
By above-mentioned design, the characteristics of the touch screen of the present embodiment has multi-point touch, low in energy consumption and accurate touch-control.
Claims (2)
1. a kind of infrared backlight module touch-screen, it is characterised in that including the backlight diffusion barrier being placed in after liquid-crystalline glasses, institute
State and elastic support is provided between backlight diffusion barrier and light guide plate, the both sides of the light guide plate have light source generator part, described
The another side of light guide plate relative resilient supporter is provided with reflecting plate, and the elastic support is by several parallel groups of springs
Into one end of the spring contradicts backlight diffusion barrier, and the other end contradicts light guide plate, and the liquid-crystalline glasses are with respect to backlight diffusion barrier
Another side is provided with touch-control glass, and in the another side of the relative liquid-crystalline glasses of the touch-control glass at least one 1 wordline are provided with
Infrared laser head.
2. infrared backlight module touch-screen according to claim 1, it is characterised in that in the light guide plate and reflection
Infrared camera is installed, the infrared camera connects microprocessor between plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710115317.3A CN106646980A (en) | 2017-03-01 | 2017-03-01 | Infrared transmitting backlight module touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710115317.3A CN106646980A (en) | 2017-03-01 | 2017-03-01 | Infrared transmitting backlight module touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106646980A true CN106646980A (en) | 2017-05-10 |
Family
ID=58846810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710115317.3A Withdrawn CN106646980A (en) | 2017-03-01 | 2017-03-01 | Infrared transmitting backlight module touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106646980A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308586A (en) * | 2019-06-28 | 2019-10-08 | 深圳市隆利科技股份有限公司 | Backlight module and electronic equipment |
| CN110769084A (en) * | 2018-07-26 | 2020-02-07 | 联想移动通信科技有限公司 | Electronic equipment and camera shooting control method |
-
2017
- 2017-03-01 CN CN201710115317.3A patent/CN106646980A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769084A (en) * | 2018-07-26 | 2020-02-07 | 联想移动通信科技有限公司 | Electronic equipment and camera shooting control method |
| CN110308586A (en) * | 2019-06-28 | 2019-10-08 | 深圳市隆利科技股份有限公司 | Backlight module and electronic equipment |
| WO2020258766A1 (en) * | 2019-06-28 | 2020-12-30 | 深圳市隆利科技股份有限公司 | Backlight module and electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170510 |