CN206096708U - LCD backlight unit - Google Patents
LCD backlight unit Download PDFInfo
- Publication number
- CN206096708U CN206096708U CN201621144608.2U CN201621144608U CN206096708U CN 206096708 U CN206096708 U CN 206096708U CN 201621144608 U CN201621144608 U CN 201621144608U CN 206096708 U CN206096708 U CN 206096708U
- Authority
- CN
- China
- Prior art keywords
- diffusion barrier
- backlight
- plate
- shaded
- reflecting plate
- 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.)
- Expired - Fee Related
Links
Landscapes
- Liquid Crystal (AREA)
Abstract
The utility model discloses a LCD backlight unit, including arranging the diffusion barrier in a poor light behind the liquid crystal glazing in, it is equipped with the elastic support body to be shaded between diffusion barrier and the prism board, and the opposite side that the prism board is shaded the diffusion barrier relatively is equipped with the reflecting plate, is equipped with infrared camera between prism board and the reflecting plate, has the backlight at the reflection fixed surface of reflecting plate. The utility model discloses aim at in, through increasing the distance of prism board to the scattering membrane that is shaded to it is shaded to enlarge gets into the average angle of incidence of diffusion barrier in a poor light, only spreads the luminous point of prism board output through back of the body light diffusion plate. So, the use of cancellation light guide plate can guarantee that the infrared ray when the light decay is less, obtains enough even effect in a poor light.
Description
Technical field
This utility model is related to multimedia technical field of touch control, relates more specifically to a kind of back of the body LCD backlight module.
Background technology
Traditional multi-point touch-control panel technology is as base using the infrared a wordline laser head of several 850nmX50mw
Quasi- end, it is separately fixed at four corners of screen.Infrared a wordline laser head positioned at four corners is infrared to swash after work
Light is paved with whole screen.Now, when there is object to press close to screen, iraser can be blocked by the body and reflect, and form bright then
Speckle.Infrared camera in screen catches to above-mentioned speck, and the picture of seizure is transferred to into microprocessor enters
Row data analysiss, are the particular locations pressed close on screen to obtain object, and follow-up interaction is completed then.
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.
The content of the invention
The purpose of this utility model is to overcome or slow down the part at least the above shortcoming, and a kind of LCD backlight is provided hereby
Module, including the backlight diffusion barrier being placed in after liquid-crystalline glasses, between the backlight diffusion barrier and prism plate elastic support is provided with,
The prism plate is provided with reflecting plate with respect to the opposite side of backlight diffusion barrier, and between the prism plate and reflecting plate infrared photography is provided with
Head, in the reflecting surface of the reflecting plate backlight is fixed with.
Preferably, the one side of the backlight diffusion barrier is smooth flat, and another side is matsurface, the backlight diffusion barrier
Smooth flat is glued with liquid-crystalline glasses, and its matsurface contradicts elastic support.
Preferably, the elastic support be elastic sponge, the elastic sponge one side laminating backlight diffusion barrier, separately
One side laminating light guide plate.
This utility model is intended to, by increasing prism plate to the distance of backlight scattering film, to expand backlight entry of backlight
The average angle of incidence of diffusion barrier, is only diffused by backlight diffuser plate to the luminous point that prism plate is exported.So, light guide plate is cancelled
Use, ensure that infrared ray when light decay is less, obtain sufficiently uniform backlight effect.
Description of the drawings
These and other aspect of the present utility model is described more fully now with reference to appended accompanying drawing, it show this
The currently preferred embodiment of utility model.Wherein：
Fig. 1 is the side sectional view of backlight module；
In figure：1st, liquid-crystalline glasses；2nd, backlight diffusion barrier；3rd, elastic support；4th, backlight；5th, prism plate；6th, reflecting plate.
Specific embodiment
Below in conjunction with the accompanying drawings and instantiation, this utility model is further elucidated, it should be understood that these embodiments are only used for
Bright this utility model rather than restriction scope of the present utility model, after this utility model has been read, people in the art
Modification of the member to the various equivalent form of values of the present utility model falls within the application claims limited range.
As shown in figure 1, a kind of LCD backlight module, including the backlight diffusion barrier 2 being placed in after liquid-crystalline glasses 1, backlight diffusion barrier
Elastic support 3 is provided between 2 and prism plate 5, the opposite side of the relative backlight diffusion barrier 2 of prism plate 5 is provided with reflecting plate 6, prism
Infrared camera 7 is provided between plate 5 and reflecting plate 6, in the reflecting surface of reflecting plate 6 backlight 4 is fixed with.
Gap is formed by the interval of elastic support 3 between the prism plate 5 and backlight diffusion barrier 2 of the present embodiment, then prism
The light maximum incident angle to be reached on backlight diffusion barrier 2 of any point output expands with the distance in the gap on plate 5
And expand.So, backlight entry of backlight diffusion barrier 2 average angle of incidence increase after, only rely on backlight diffusion barrier 2 can to carry on the back
Light realizes effectively diffusion；And eliminate the use to light guide plate, can reduce infrared light due to refraction caused light decay.
Preferably, the one side of backlight diffusion barrier 2 is smooth flat, and another side is matsurface, and the smooth of backlight diffusion barrier 2 is put down
Face is glued with liquid-crystalline glasses 1, and its matsurface contradicts elastic support 3.
So, when backlight is by matsurface entry of backlight diffusion barrier 2, can further expand the refraction angle of backlight, make
Backlight is more uniform；And infrared ray is by shiny surface entry of backlight diffusion barrier 2, and when being projected by matsurface, refraction angle is little, keeps away
Exempt to reflect the impact to infrared light path.
Wherein, elastic support 3 is elastic sponge, the one side laminating backlight diffusion barrier 2 of elastic sponge, another side patch
Close light guide plate.
Claims (3)
1. a kind of LCD backlight module, it is characterised in that including the backlight diffusion barrier being placed in after liquid-crystalline glasses, the backlight diffusion
Elastic support is provided between film and prism plate, the prism plate is provided with reflecting plate with respect to the opposite side of backlight diffusion barrier, described
Infrared camera is provided between prism plate and reflecting plate, in the reflecting surface of the reflecting plate backlight is fixed with.
2. LCD backlight module according to claim 1, it is characterised in that the one side of the backlight diffusion barrier is smooth flat
Face, another side is matsurface, and the smooth flat of the backlight diffusion barrier is glued with liquid-crystalline glasses, and its matsurface contradicts resilient support
Body.
3. LCD backlight module according to claim 1, it is characterised in that the elastic support is elastic sponge, described
The one side laminating backlight diffusion barrier of elastic sponge, another side laminating light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621144608.2U CN206096708U (en) | 2016-10-21 | 2016-10-21 | LCD backlight unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621144608.2U CN206096708U (en) | 2016-10-21 | 2016-10-21 | LCD backlight unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206096708U true CN206096708U (en) | 2017-04-12 |
Family
ID=58484545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621144608.2U Expired - Fee Related CN206096708U (en) | 2016-10-21 | 2016-10-21 | LCD backlight unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206096708U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018594A (en) * | 2019-04-29 | 2019-07-16 | 惠州市华星光电技术有限公司 | Backlight module and display module |
| US11294116B2 (en) | 2018-02-01 | 2022-04-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Display device based on diffusion film and electronic device |
-
2016
- 2016-10-21 CN CN201621144608.2U patent/CN206096708U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11294116B2 (en) | 2018-02-01 | 2022-04-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Display device based on diffusion film and electronic device |
| CN110018594A (en) * | 2019-04-29 | 2019-07-16 | 惠州市华星光电技术有限公司 | Backlight module and display module |
| CN110018594B (en) * | 2019-04-29 | 2020-09-01 | 惠州市华星光电技术有限公司 | Backlight module and display module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW202004079A (en) | Optical device | |
| US20120127128A1 (en) | Hover detection in an interactive display device | |
| EP1288708A4 (en) | Back face transmission screen | |
| JP5872206B2 (en) | Projection system | |
| CN203849450U (en) | Light guide plate | |
| CN109725484A (en) | A kind of off-axis short focus orthographic projection optical screen and projection display system | |
| US10649132B2 (en) | Diffusion sheet, backlight module and display device | |
| CN208752353U (en) | Prevent the backlight module in corner and edge light leakage | |
| WO2019214633A1 (en) | Diffuser, backlight module, liquid crystal display panel, and display device | |
| CN206096708U (en) | LCD backlight unit | |
| TWM577512U (en) | Short-focus front projection ambient light resist screen | |
| TWM296382U (en) | Plastic frame structure improvement for back light module | |
| CN204009335U (en) | The optical projection system of a kind of short projection distance forward projection optical screen | |
| WO2015109742A1 (en) | Backlight module and display device | |
| TWI623798B (en) | Plastic frame, backlight module, and flat panel display device using the same | |
| JP4026135B2 (en) | Surface lighting device | |
| CN106764708A (en) | Light source assembly, backlight module and display device | |
| KR20090052081A (en) | A prism sheet and the fabrication method, a backlight unit and a liquid crystal display device having the same | |
| CN211478810U (en) | Large-size seamless splicing display system | |
| CN206523723U (en) | The display of built-in light source | |
| TWI526742B (en) | Curved back light module | |
| CN106647039A (en) | Infrared-transmitting backlight module | |
| CN106646980A (en) | Infrared transmitting backlight module touch screen | |
| WO2016086450A1 (en) | Light guide plate, backlight module, and liquid crystal display device | |
| CN208848016U (en) | Backlight module and liquid crystal display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20201021 |