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Light adjusting structure of display device, backlight module and display device

A technology of a display device and a backlight module, which is applied in the field of display and can solve problems such as the inability of a light guide plate to control the brightness of image display

Active Publication Date: 2017-01-04
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the existing light guide plate cannot control the image display brightness at the local display position, and provides a dimming structure of a display device, a backlight module and a display device

Method used

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  • Light adjusting structure of display device, backlight module and display device
  • Light adjusting structure of display device, backlight module and display device
  • Light adjusting structure of display device, backlight module and display device

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides a dimming structure of a display device, such as figure 2 As shown, it includes: a light guide plate 2, the light-emitting surface of the light guide plate 2 is the first surface, and the surface opposite to the first surface is the second surface; The mesh point 3, the material of the scattering mesh point 3 includes electrorefractive material; the electric field control unit 4 is used to change the electric field at the location of the scattering mesh point 3 so that the scattering mesh point 3 changes the refractive index.

[0035] In the light-adjusting structure of this embodiment, the electric field at the location of the scattering network point 3 is changed by the electric field control unit 4 to change the refractive index of the scattering network point 3, so that the optical properties of the electro-refractive index material are changed, and the total reflection of the light guide plate 2 is realized. , that is, there is no outgoing...

Embodiment 2

[0037] This embodiment provides a dimming structure of a display device, such as image 3 As shown, it includes: a light guide plate 2; a scattering grid point 3 that is arranged on the second surface of the light guide plate 2 and protrudes to the first surface, and the material of the scattering grid point 3 includes an electro-refractive material; and is used to change the position of the scattering grid point 3 The electric field control unit 4 of the electric field at the place, wherein the electric field control unit 4 includes: a transparent conductive layer 41 arranged on the first surface of the light guide plate 2; a dimming substrate 42 arranged on the second surface of the light guide plate 2; a controller 43, It is used to control the voltage between the dimming substrate 42 and the transparent conductive layer 41 .

[0038] Wherein, the transparent conductive layer 41 and the dimming substrate 42 are disposed on the upper and lower surfaces of the light guide pla...

Embodiment 3

[0046] This embodiment provides a backlight module, including the above-mentioned dimming structure and a light source 1 located at the side of the light guide plate 2 of the dimming structure.

[0047] Preferably, the controller 43 controls the voltage between the dimming substrate 42 and the transparent conductive layer 41 to be 0, the refractive index of the scattering dots 3 is 1.468, and the light emitted by the light source 1 is totally reflected in the light guide plate 2 .

[0048] Preferably, a reflective sheet 5 is provided between the light guide plate 2 and the dimming substrate 42; the refractive index of the scattering dots 3 is greater than 1.5, and the controller 43 controls the voltage V between the dimming substrate 42 and the transparent conductive layer 41 to be greater than or equal to 0.32h / a , the light emitted by the light source 1 is refracted at the scattering dots 3, diffusely reflected by the reflective sheet 5, and emitted from the first surface.

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Abstract

The invention provides a light adjusting structure of a display device, a backlight module and a display device, belongs to the technical field of display, and solves the problem that the existing light guide plate cannot control the image display luminance in a local display position. In the light adjusting structure of the display device disclosed by the invention, scattering netted dots in a light guide plate main body are mainly made of electrochromic refractive materials, and electric fields in the positions of the scattering netted dots are changed through an electric field control unit to change refractive indexes of the scattering netted dots so as to change optical properties of electrochromic refractive index materials, so that the light guide plate is in a total reflection state, that is, the light guide plate has no emergent light, and the backlight module is further in a dark state; or the light is refracted from the scattering netted dots and in diffuse reflection to make the backlight module in a bright state, so as to improve local dynamic dimming of different regions of the display device and improve the image display contrast. The backlight module disclosed by the invention is suitable for various display devices.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a light adjustment structure of a display device, a backlight module and a display device. Background technique [0002] Existing edge-type backlight modules, such as figure 1 As shown, it includes a light guide plate 2 and a light source 1 located on the side of the light guide plate 2, wherein the light source 1 can be a point light source or a line light source, and the light emitted by the light source 1 enters the inside of the light guide plate 2 and then shines on the bottom surface of the light guide plate 2. Scattering takes place after the scattering dots 3 are on, so that the point light source or line light source is converted into an upwardly emitting surface light source, thereby providing a uniform backlight for the display panel. [0003] The inventors have found that there are at least the following problems in the prior art: the light guide plate 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00G02F1/01
CPCG02B6/004G02F1/0105
Inventor 陈鹏名张斌董殿正张强解宇王光兴张衎
Owner BOE TECH GRP CO LTD
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