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Backlight module and optical plate thereof

A technology of backlight module and optical board, applied in optics, optical components, nonlinear optics, etc., can solve the problems of light loss, increase the number of light interfaces, and reduce light utilization rate, etc.

Inactive Publication Date: 2010-01-06
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the light is transmitted in the optical plate 10 and the upper diffusion sheet 14, part of the light will be absorbed and cause light loss; The number of interfaces increases the interface loss of light transmission and reduces light utilization

Method used

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  • Backlight module and optical plate thereof
  • Backlight module and optical plate thereof
  • Backlight module and optical plate thereof

Examples

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Embodiment Construction

[0020] The backlight module and its optical board of the present invention will be further described in detail below with reference to the drawings and embodiments.

[0021] See Figure 3 to Figure 5 , shows the optical plate 20 of the preferred embodiment 1 of the present invention, which is composed of a transparent body including a first surface 21 and a second surface 23 opposite to the first surface 21 . The first surface 21 has a plurality of elongated arc-shaped grooves 22 parallel to each other, and the second surface 23 has a plurality of elongated arc-shaped protrusions 24 parallel to each other and a plurality of elongated V-shaped protrusions parallel to each other. 25, the extending direction of multiple elongated arc-shaped protrusions 24 intersects the extending direction of multiple elongated V-shaped protrusions 25, and the extending direction of multiple elongated arc-shaped grooves 22 is parallel to the multiple elongated The extension direction of the shap...

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Abstract

A backlight module comprises a frame, a light source and an optical plate. The light source is positioned in the frame and the optical plate is arranged above the light source. The optical plate comprises a transparent body and the transparent body comprises a first surface and a second surface opposite to the first surface, wherein the first surface is provided with a plurality of mutually parallel long strip arc grooves; the second surface is provided with a plurality of mutually parallel long strip arc bulges and a plurality of mutually parallel long strip V-shaped bulges, the extension directions of the long strip arc bulges intersect with the extension directions of long strip V-shaped bulges, and the extension directions of the long strip arc grooves are parallel to the extension directions of the long strip arc bulges. The invention also provides the optical plate adopted by the backlight module. The backlight module has the advantages of improving efficient utilization ratio of light and enjoying uniformity of light emission.

Description

technical field [0001] The invention relates to a backlight module and its optical board, in particular to a backlight module for liquid crystal display and its optical board. Background technique [0002] See figure 1 , shows a conventional direct-lit backlight module 100, which includes a frame 11, a plurality of light sources 12 disposed inside the frame 11, and a diffusion plate 13 disposed above the light sources 12 and covering the frame 11. [0003] In use, the light generated by the plurality of light sources 12 can be diffused after entering the diffuser plate 13 . However, after being diffused by the diffusion plate 13, the exit angles of the light from the diffusion plate 13 become more chaotic, so that its brightness in a specific viewing angle range is not high; It is still often difficult for the plate 13 to directly diffuse the light from the light source 12 evenly, so that the light emitted from the diffuser plate 13 is prone to light source afterimages, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02B6/00F21V8/00
Inventor 章绍汉
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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