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Backlight angle control method based on refraction index matching

A technology of refractive index matching and angle control, applied in optics, nonlinear optics, instruments, etc., can solve the problems of reducing light energy utilization rate, redundant light output, affecting visual effects, etc., to improve light energy utilization rate and reduce brightness Distortion, the effect of a simple method

Inactive Publication Date: 2014-04-23
NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the brightness of the existing backlight module structure will increase suddenly, which will affect the visual effect, and finally cause the output of excess light on the display at a large angle, and reduce the utilization rate of light energy. Backlight Angle Control Method Based on Refractive Index Matching

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  • Backlight angle control method based on refraction index matching
  • Backlight angle control method based on refraction index matching
  • Backlight angle control method based on refraction index matching

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 2 , 3 shown.

[0023] The essence of the present invention is to change the conventional use method of the optical film in the backlight module, and add a medium with matching refractive index, so that the refractive index between the optical film group and the air medium can be more matched. Due to the matching of the refractive index of each layer, the conditions of total reflection are changed, and the angular distribution of light rays no longer has the problem of brightness distortion as before. At the same time, adjust the refractive index, thickness, transmittance and other parameters of the added medium to control the light output angle. In the present invention, a medium layer 7 that meets the required refractive index is filled in the prism gap of the prism brightness enhancement film 6 of the optical film group, ...

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Abstract

A backlight angle control method based on refraction index matching is characterized in that a medium layer which meets the requirement for the needed refractive index is arranged in a prism gap of a prism bright enhancement film of an optical module in a filling mode, light which is emergent out through the prism bright enhancement film passes through the medium layer and then enters air media so that the backlight light-out angle can be controlled, the brightness distortion of backlight is reduced, and meanwhile output of superfluous light at the large angle of an LCD is reduced. According to the backlight angle control method based on refraction index matching, the brightness distortion of the backlight can be reduced, the out-light angle is effectively controlled, and superfluous light output at the large angle of the LCD is reduced.

Description

technical field [0001] The invention relates to a display technology, in particular to a backlight angle control technology in liquid crystal display technology, in particular to a backlight angle control method based on refractive index matching. Background technique [0002] As we all know, the backlight module is an optical component that provides the back light source in LCD display products. Such as Figure 1 The shown backlight module is mainly composed of main light source, light guide plate, diffusion film, prism brightness enhancement film, reflector and other components. In the optical film group, it is generally a combination of diffusion film and prism brightness enhancement film. [0003] The directionality of the light emitted from the diffusion film is poor, so the prism brightness enhancement film must be used to correct the direction of the light. Prism brightness enhancement film is a precise acrylic resin prism structure formed on the surface of polyest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357
Inventor 王绪丰樊卫华高慧芳洪乙又吴金华曹允吴添德孙磊李忠良
Owner NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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