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Light guiding plate

A light guide plate and reflective surface technology, applied in the field of light guide plates, can solve problems such as poor brightness uniformity, achieve the effects of eliminating shadows, easy control of exit angles, and improvement of light energy utilization

Active Publication Date: 2009-02-18
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although a V-shaped structure is processed on the reflective surface and the outgoing surface of the light guide plate 50, which can achieve the purpose of partially compressing the angle and improving the brightness, the entire light guide plate cannot control the outgoing light beam in a direction perpendicular to the outgoing surface, and additional optical film, and the brightness uniformity of the structure is relatively poor

Method used

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Embodiment Construction

[0041] The structure of the light guide plate of the present invention will be further described in detail with reference to the drawings and multiple embodiments.

[0042] Such as Figure 6As shown, the light guide plate 60 of the first embodiment has an incident surface 61 (a side surface), a reflective surface 62 (lower surface) and an outgoing surface 64 (upper surface); The V-shaped structure 644 forms a plurality of second V-shaped structures 622 on the surface of the reflecting surface 62 , and the directions of the second V-shaped structures 622 on the reflecting surface and the first V-shaped structures 644 on the emitting surface are perpendicular to each other.

[0043] The light guide plate 60 is a flat plate structure, which can be made of polycarbonate (PC), polymethyl methacrylate (PMMA), or acrylic and other common light guide plate materials and synthetic resin materials.

[0044] Such as Figure 7 As shown, the plurality of first V-shaped structures 644 for...

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Abstract

A light guide device ( 60 ) and a backlight module using the same. The light guide device includes: an incident surface ( 61 ); an emitting surface ( 64 ) adjacent to the incident surface; a reflecting surface ( 62 ) opposited to the emitting surface; a plurality of first V-shaped structures ( 644 ) formed on the emitting surface; and a plurality of second V-shaped structures ( 622 ) formed on the reflecting surface and perpendicular to the first V-shaped structures, wherein respective heigths of the second V-shaped structures increase with increasing distance from the incident surface and respective distances between adjacent second V-shaped structures decrease with increasing distance from the incident surface. The light guide device of the present invention does not need optical elements, and thus has a simple structure. A backlight module using the same light guide plate is also provided.

Description

【Technical field】 [0001] The invention relates to a light guide plate applied to a liquid crystal display backlight module, in particular to a light guide plate for side light illumination. 【Background technique】 [0002] Liquid crystal displays with side-lit backlight units are widely used in fields such as notebook computers, vehicle displays, and mobile phones due to their small size, light weight, and uniform brightness. The backlight module of the liquid crystal display is an optical mechanism that can convert scattered point light sources or line light sources into uniform planar light sources. With the expansion of the application field of liquid crystal displays, higher requirements are put forward for the backlight technology based on the light guide plate, which is mainly manifested in: high brightness, low cost, low energy consumption, light and thin, etc. [0003] Such as figure 1 As shown, the current traditional backlight module 1 includes a light source 10 ,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335G02B5/00
CPCG02B6/0016G02B6/0038Y10S385/901G02B6/0061
Inventor 冯迪严瑛白杨兴朋刘海涛金国藩范守善
Owner TSINGHUA UNIV
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