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Backlight module set and its light guide plate

A backlight module and light guide plate technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as consumption of light utilization, underutilization of light, uneven light output from backlight module 1, etc., to avoid excessive light intensity High, light utilization rate increased, the effect of uniform output

Inactive Publication Date: 2009-06-10
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] The area of ​​the backlight module 1 corresponding to the lamp tube 13 will be brighter than other areas of the backlight module 1, which will easily lead to uneven light output from the backlight module 1
[0006] In addition, since the liquid crystal panel is only located on one side of the backlight module 1 opposite to the diffusion sheet 12, the light scattered by the lamp tube 13 towards the other side can only be reflected back by the reflector 14 to achieve the function of display light. In this way, the backlight module 1 not only consumes the light utilization rate when the light is reflected, but also can only provide a single-sided display function, and does not make full use of the light.

Method used

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  • Backlight module set and its light guide plate
  • Backlight module set and its light guide plate
  • Backlight module set and its light guide plate

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] see figure 2 , is an embodiment of the backlight module of the present invention. The backlight module 2 includes two light guide plates 20 , a plurality of lamp tubes 23 , two prism sheets 21 , two diffusion sheets 22 and an outer frame 25 .

[0032] The lamp tubes 23 are generally cold cathode fluorescent lamps, and several lamp tubes 23 are arranged in parallel in the backlight module 2 .

[0033] The two light guide plates 20 are arranged symmetrically with the plane formed by a plurality of lamp tubes 23 arranged in parallel as the symmetrical plane, and respectively include a light incident surface 201 and a light exit surface 202 opposite to the light incident surface 201, and only one of them will be described below. . The light incident surface 201 of the light guide plate 20 includes a plurality of first protrusion groups 2011 arranged at...

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Abstract

A back light module relates to two light guide plates to be in opposite way, forming each of two light guide plates by a light incoming surface and a light outgoing surface, arranging a numbers of lamp tubes between said light incoming surfaces, setting a numbers of the first ledge sets on said light incoming surfaces separately at region facing to lamp tube in interval way, arranging the second ledge between adjacent first ledge sets and setting region in facing to the first ledge set on light outgoing surface to be concave surface. The method for preparing said light guide plate is also disclosed.

Description

【Technical field】 [0001] The invention relates to a backlight structure, in particular to a backlight module capable of emitting light from both sides, a light guide plate applied to the backlight module, and a manufacturing method of the light guide plate. 【Background technique】 [0002] In a general liquid crystal display, a backlight module is used as a light source, and the backlight module can be generally divided into two types: side-light type and direct-light type according to different structures. [0003] Edge-lit backlight modules usually use only one or two lamps as the light source, and use the design of the light guide plate to strengthen the control of the direction of light travel. However, it is difficult to control the direction of light travel, so the display effect is usually poor. In contrast, the design of the direct-type backlight module is to place the lamp tube as the light source directly below the backlight module. Because the installation space be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335
Inventor 廖明毅
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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