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Light guide plate, preparation method thereof and light-emitting device

A technology of light guide plate and reflective layer, applied in the direction of optical elements, light guide, optics, etc., can solve the problems of the uniformity of light output of the light guide plate, complicated steps, scratches, etc.

Inactive Publication Date: 2020-04-17
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the fact that the light guide plate will have a certain deformation during the production and processing of the dots, it will affect the light uniformity of the light guide plate, which will lead to adverse effects on the light uniformity of the entire backlight module.
In addition, in the process of assembling the backlight module, it is necessary to place the reflection sheet first, then the light guide plate, and then the diffusion sheet. The steps in the actual operation process are relatively cumbersome, and there will be scratches and other defects during the placement process, which will affect the The effect of the backlight module

Method used

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  • Light guide plate, preparation method thereof and light-emitting device
  • Light guide plate, preparation method thereof and light-emitting device
  • Light guide plate, preparation method thereof and light-emitting device

Examples

Experimental program
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preparation example Construction

[0038] The present invention also provides a method for preparing a light guide plate, comprising the following steps:

[0039] S101: Extrusion casting method is used to prepare a composite layer, the composite layer includes a reflective layer and a transparent layer stacked.

[0040] Further, step S101 includes the following steps:

[0041] S1011: Provide the first slurry and the second slurry.

[0042] Wherein, the first slurry is one or more of polymethyl methacrylate, polycarbonate, polymethyl methacrylate and polystyrene; the second slurry includes the first component and the second component , the first component is powder, and the second component is selected from one or more of polymethyl methacrylate, polycarbonate, polymethyl methacrylate and polystyrene. Furthermore, the second component is the same as the first slurry.

[0043] Furthermore, in the second slurry, the mass percentage of the first component is 5%-60%; further, 30%-40%.

[0044] Furthermore, the p...

Embodiment 1

[0057] The preparation method of the light guide plate of embodiment 1 comprises the following steps:

[0058] (1) The composite layer is prepared by a double-layer extrusion casting process, which includes an extruder A and an extruder B, wherein the extruder A is used to form a reflective layer, and the extruder B is used to form a transparent layer. Add the first slurry to extruder A, the first slurry is BaSO 4 and PMMA, where BaSO 4 The mass percentage content of the extruder B is 30%; the second slurry (polymethyl methacrylate) is added to the extruder B, and the extrusion volume of the extruder B and the extrusion volume of the extruder A are 3:1 , then the proportion of the reflective bottom layer is 25%, and the total thickness of the extruded light guide plate is 1mm.

[0059] (2) Emboss the side of the transparent layer away from the reflective layer with a cooling sand roller to form a rough surface, the surface roughness Ra is 0.3 microns, the formula and test re...

Embodiment 2

[0061] Basically the same as Example 1, the difference is that the powder used is SiO 2 .

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PUM

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Abstract

The invention relates to a light guide plate, a preparation method thereof and a light-emitting device, the light guide plate comprises a reflecting layer and a transparent layer which are arranged ina laminated manner, one surface of the transparent layer far away from the reflecting layer is a rough surface, the reflecting layer contains powder, and the light guide plate can effectively increase the light emitting uniformity.

Description

technical field [0001] The invention relates to the technical field of optical display, in particular to a light guide plate, a preparation method thereof, and a light emitting device. Background technique [0002] The light guide plate is an optical component of backlight modules widely used in the field of liquid crystal displays. It is mainly used in side-entry backlights. The dots are made on the bottom of the light guide plate by printing, hot pressing, laser or injection molding, so that the light can flow through the dots. The total reflection is formed at the place to improve the uniformity of light output. In addition, in order to improve the forward light emission of the backlight, it is also necessary to place a reflective sheet under the light guide plate. In order to improve the uniformity of light emitted from the light guide plate in the forward direction, it is also necessary to place a diffusion sheet above the light guide plate. [0003] Since the light g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00G02F1/13357
CPCG02B6/0051G02B6/0055G02F1/133615
Inventor 金亚东杨承翰张强朱正平
Owner NINGBO CHANGYANG TECH