Preparation method of light guide plate used as liquid crystal display backlight

A technology of liquid crystal display and light guide plate, applied in the field of light guide plate and its preparation, can solve the problems of difficult to remove scars, unavoidable, bumping, friction and the like

Inactive Publication Date: 2018-02-02
GUANGDONG GMA OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low hardness of the light guide plate, with a Mohs hardness of 2, it is inevitable that there will be bumps and frictions during transportation, cutting or installation. In addition to various unpredictability in production and use, it is easy to scratch it. Even in serious cases, it will lead to the scrapping of the whole light guide plate
Although people think of some simple repair methods, as people have higher and higher requirements for the color displayed on the monitor today, the general repair obviously cannot escape people's critical eyes, and some scars are difficult to remove

Method used

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  • Preparation method of light guide plate used as liquid crystal display backlight

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Mix the weight fraction of PMMA28kg, PC15kg, light diffusing agent 2kg, light stabilizer 0.6kg, heat stabilizer 0.3kg, silicone masterbatch 1kg and add it to the melting device, heat the material to 460°C, and then use 190mm / s Speed ​​injection into the mold and allow it to cool. After the light guide plate was obtained, the hardness was measured with a Mohs hardness tester, and it was found that the hardness was less than 3.

Embodiment 2

[0017] Mix the weight fraction of PMMA28kg, PC15kg, light diffusing agent 2kg, light stabilizer 0.6kg, heat stabilizer 0.3kg, silicone masterbatch 2.5kg and add it to the melting device, heat the material to 460°C, and then heat it at 190mm / s Inject into the mold at a high speed and wait for it to cool. After the light guide plate was obtained, the hardness was measured with a Mohs hardness tester, and it was found that its hardness was slightly greater than 3, and there were slight scratches on the level 3 hardness tester.

Embodiment 3

[0019] Mix the weight fractions of PMMA28kg, PC15kg, light diffusing agent 2kg, light stabilizer 0.6kg, heat stabilizer 0.3kg, and fused silica sand 5kg, then add it to the melting device, heat the material to 460°C, and then heat it at a speed of 190mm / s Inject into molds and allow to cool. After the light guide plate was obtained, the hardness was measured with a Mohs hardness tester, and it was found that the hardness was less than 4, and the level 4 hardness tester caused scratches on the light guide plate.

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Abstract

The invention provides a light guide plate as a liquid crystal display backlight and a preparation method thereof, comprising PMMA, PC, light diffusing agent, light stabilizer, heat stabilizer, silicone masterbatch, fused silica sand, the weight of each component The number of parts is: PMMA35‑60, PC25‑40, light diffusing agent 1‑8, light stabilizer 0.3‑3, heat stabilizer 0.1‑1, silicone masterbatch 2‑5, fused silica sand 10‑15. The above materials are melted and then injected into a mold to make a light guide plate. The light guide plate can exhibit higher hardness at normal temperature, and can effectively prevent scratches on the surface of the light guide plate.

Description

technical field [0001] The invention relates to a light guide plate used as a liquid crystal display backlight source and a preparation method thereof Background technique [0002] The existing light guide plate uses optical grade acrylic / PC board, and then uses high reflectivity and non-light-absorbing high-tech materials to print light guide points on the bottom surface of the optical grade acrylic board with UV screen printing technology. The optical-grade acrylic plate is used to absorb the light emitted from the lamp to stay on the surface of the optical-grade acrylic plate. When the light hits each light guide point, the reflected light will spread to all angles, and then destroy the reflection condition and be emitted from the front of the light guide plate. Through light guide points of various densities and sizes, the light guide plate can be made to emit light evenly. The purpose of the reflector is to reflect the light exposed on the bottom surface back into the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L69/00C08L83/04C08K3/36
CPCC08L33/12C08L2205/03C08L69/00C08L83/04C08K3/36
Inventor 廖勇军陈明波张诺寒陈伟豪张坤
Owner GUANGDONG GMA OPTOELECTRONICS TECH
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