Light guide plate and back light unit
A technology of backlight module and light guide plate, applied in the directions of optics, light guide, light source, etc., can solve the problems of unhelpful display light source improvement, poor uniformity of the light-emitting surface, and brightness decline of the light-emitting surface.
Inactive Publication Date: 2015-07-01
AU OPTRONICS CORP
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Problems solved by technology
[0004] However, the design of the above-mentioned light guide plate with wedge-shaped protrusions allows most of the light energy of the light source to be output from the light-emitting surface, but the light is emitted from the wedge-shaped protrusions earlier, resulting in unexpected hot spots on the wedge-shaped protrusions. It helps to improve the display light source, but instead causes the light utilization efficiency of the light-emitting surface of the light guide plate to decrease and the uniformity of the light-emitting surface to be poor, which in turn leads to a decline in the brightness of the effective light-emitting surface of the light guide plate.
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[0081] The following will clearly illustrate the spirit of the present invention with illustrations and detailed descriptions. After those skilled in the art understand the embodiments of the present invention, they can be changed and modified by the technology taught in the present invention, which does not depart from the present invention. spirit and scope.
[0082] see Figure 1A , Figure 1B shown. Figure 1A A side view of the light guide plate 100 according to an embodiment of the present invention is shown. Figure 1B draw Figure 1A The front view of the light incident surface 330 of the light guide plate 100.
[0083] The present invention provides a light guide plate 100 that can reduce hot spot phenomenon and improve light utilization efficiency. The light guide plate 100 includes a plate body 200 and one or more wedge-shaped protrusions 300 . The plate body 200 has a light emitting surface 210 and a reflecting surface 220 disposed opposite to each other, and a ...
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The invention provides a light guide plate and a back light unit. The light guide plate comprises a plate body, a wedge-shaped protruding part and an optical microstructural pattern. The plate body has a light-emitting surface and a reflection surface which are opposite to each other. The wedge-shaped protruding part is arranged at one side edge of the light-emitting surface and forms a light-incoming surface with the plate body. The wedge-shaped protruding part has an inclined surface for connecting the light-incoming surface and the light-emitting surface. The optical microstructural pattern is arranged in a vertical projection region of the inclined surface corresponding to the reflection surface. The invention prevents a light source from emitting from the wedge-shaped protruding part earl.
Description
technical field [0001] The invention relates to a light guide plate and a backlight module, in particular to a light guide plate with an optical microstructure pattern and a backlight module. Background technique [0002] Backlight modules can be roughly divided into "side-light" and "direct-light" designs according to the position of the light source. The "side-light" design of the backlight module is to place the light source, such as a light-emitting element, on the side of the light guide plate, and then use the light guide plate to control the light beam. direction of travel to provide a uniform area light source. [0003] With the demands and restrictions of modern trends, many light-emitting products are developing towards a short, light and thin appearance, which makes the backlight module in the light-emitting products gradually become thinner and the thickness of the light guide plate is reduced. The light output range of the light source (such as a light emitting...
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IPC IPC(8): G02B6/00F21V8/00F21S8/00F21Y101/02F21Y103/10F21Y105/00F21Y115/10
Inventor 伍玉平
Owner AU OPTRONICS CORP