Pervasion piece

A diffusion sheet and diffusion layer technology, applied in lighting and heating equipment, instruments, layered products, etc., can solve the problems of poor refraction effect, achieve strong light diffusion effect, and avoid the effect of light source bright shadow

Inactive Publication Date: 2008-02-06
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] However, when the intensity of light incident on different parts of the diffusing sheet 20 varies greatly, since the materials of the diffusing particles 112 and the transparent matrix 111 are relatively similar, and the refractive indices of the two are close, the diffusing particles 112 refract the light. The effect is poor; it is difficult for the diffuser 20 to sufficiently diffuse the light at the place with strong light intensity to avoid the generation of bright shadows of the light source, and it is easy to affect the uniformity of light diffusion

Method used

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Embodiment Construction

[0015] The diffusion sheet will be further described in detail with reference to the accompanying drawings and embodiments.

[0016] Please refer to FIG. 2 , which is a schematic cross-sectional view of a diffusion sheet according to a first embodiment of the present invention. The diffusion sheet 21 includes a transparent resin substrate 211, and first scattering particles 212 and second scattering particles 213 doped in the transparent resin substrate 211, the refractive index of the first scattering particles 212 is higher than that of the second scattering particles The refractive index of 213 is small. Wherein, the weight percentage of the transparent resin substrate 211 may be 5% to 90%; the sum of the weight percentages of the first scattering particles 212 and the second scattering particles 213 may be 10% to 95%; The weight percent ratio of the second scattering particles 213 to the first scattering particles 212 may be 1 / 100 to 1 / 5.

[0017] The transparent resin s...

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Abstract

The present invention discloses a diffusion piece and comprises a diffusion layer. The diffusion layer consists of a transparent resin parent metal, as well as a first scattering particle and a second scattering particle doping in the transparent resin parent metal. The refractive index of the first scattering particle is smaller than the refractive index of the second scattering particle. The light diffusion effect of the diffusion piece is strong.

Description

technical field [0001] The invention relates to a diffusion sheet for a backlight module. Background technique [0002] Liquid crystal display devices are widely used in electronic products such as personal digital assistants, notebook computers, digital cameras, mobile phones, and LCD TVs. However, since the liquid crystal display device is not self-illuminating, it needs a backlight module to produce a display function. [0003] Since the light source is generally a point light source or a line light source, and the backlight module needs to use a surface light source to achieve a uniform brightness display effect, the backlight module needs to use a light diffusion element to convert the point light source or line light source into a surface light source. The light diffusing element is generally a diffusing sheet. [0004] Please refer to FIG. 1 , which is a schematic cross-sectional view of a conventional diffuser. The diffusion sheet 10 includes a transparent substra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02F1/1335B32B7/02B32B27/30B32B27/36B32B27/38F21V3/00F21V3/04G02F1/13357
CPCG02B5/0242G02B5/0215G02B5/0278
Inventor 章绍汉
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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