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Backlight module and diffusion plate thereof

A technology of diffusing plate and diffusing particles, applied in optics, nonlinear optics, diffusing elements, etc., can solve the problems of increasing light transmission interface loss, light loss, and reducing light utilization rate, etc.

Inactive Publication Date: 2012-05-23
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, when the light is transmitted in the prism sheet 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 diffusion plate thereof
  • Backlight module and diffusion plate thereof
  • Backlight module and diffusion plate thereof

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Embodiment Construction

[0017] The backlight module and its diffuser plate of the present invention will be further described in detail below with reference to the drawings and embodiments.

[0018] See Figure 2 to Figure 3 , shows the diffusion plate 20 of the preferred embodiment 1 of the present invention, which is made of a transparent body doped with diffusion particles 205 . The transparent body includes a first surface 201 and a second surface 202 opposite to the first surface 201 . The first surface 201 has a plurality of micro-grooves 203 , and the second surface 202 has a plurality of elongated arc-shaped grooves 204 .

[0019] A plurality of micro-grooves 203 on the first surface 201 are closely arranged in a regular array, and the plurality of micro-grooves 203 are triangular pyramids, and every six adjacent micro-grooves 203 with a common connection point form a hexagonal star shape. The plurality of microgrooves 203 may be formed by a plurality of V-shaped ridge structures extending...

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Abstract

A diffusion plate is made of a transparent body doped with diffusion particles. The transparent body comprises a first surface and a second surface opposite to the first surface. The first surface is provided with a plurality of micro grooves which are all of rectangular pyramid shapes. Every six adjacent micro grooves with a common connection point form a hexagram. The second surface is provided with a plurality of long strip arc grooves which are parallel to each other. The radius of arc in the long strip arc groove is defined as R, the center distance of adjacent long strip arc grooves 204 is defined as P, the maximum depth of each long strip arc groove 204 is defined as H, then R, P and H satisfy the following relation: 0.025mm<=P<=1.5mm, 0.01mm<=R<=2P, and 0.01mm<=H<=R. The diffusion plate can improve efficient utilization ratio of light and enjoy high uniformity of light emission. The invention also relates a backlight module adopting the diffusion plate.

Description

technical field [0001] The invention relates to a backlight module and a diffusion plate thereof, in particular to a backlight module for liquid crystal display and a diffusion plate thereof. 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 diffuser plate 13, the angles at which light emerges from the diffuser 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 sou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02G02F1/13357
Inventor 章绍汉
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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