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Plate for guiding light and backlight module

A backlight module and light guide plate technology, which is applied in optics, optical components, diffraction gratings, etc., can solve the problems of inapplicability to a wide spectral range and low light energy utilization rate of the light guide plate, so as to improve the light energy utilization rate and eliminate Dark band phenomenon, the effect of increasing the diffusion angle

Inactive Publication Date: 2006-07-05
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems in the prior art that the light energy utilization rate of the light guide plate is low and cannot be applied to a wider spectral range, the present invention provides a light guide plate that can improve the light energy utilization rate and is applicable to a wider spectral range

Method used

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  • Plate for guiding light and backlight module
  • Plate for guiding light and backlight module
  • Plate for guiding light and backlight module

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Embodiment Construction

[0017] Please refer to image 3 , Figure 4 and Figure 5 , are respectively a perspective view, a top view and a front view of the light guide plate of the present invention. The light guide plate 30 includes a light incident surface 305 , a light exit surface 301 intersecting the light incident surface 305 , a bottom surface 303 and three side surfaces 307 , 309 , 311 . The light emitted by the light source enters the light guide plate 30 through the light incident surface 305, part of the light directly exits the light exit surface 301, and part of the light is reflected multiple times by the reflector (not shown) arranged near the bottom surface 303, and also exits through the light exit surface 301. The light incident surface 305 is a cylindrical lens structure, and a plurality of sub-wavelength anti-reflection gratings 302 are arranged on the surface, and the sub-wavelength anti-reflection gratings 302 are designed in a V-shaped groove shape.

[0018] The light is dif...

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Abstract

The invention relates to a light guide plate and a backlight module. And the light guide plate comprises a light incoming surface, a light outgoing surface intersecting the light incoming surface and a bottom surface opposite to the light outgoing surface, where the light incoming surface is of a columnar prism structure and has a sub-wavelength reflective grating which is used to improve the light incoming efficiency and can eliminate the dark band phenomenon caused by using light sources. And the light guide plate can provide high efficiency and high uniformity irradiation for a LCD module.

Description

【Technical field】 [0001] The present invention relates to a light guide plate and a backlight module, in particular to a light guide plate and a backlight module capable of improving light energy utilization. 【Background technique】 [0002] The liquid crystal display module is a kind of non-self-luminous display device, and its display is mainly realized by controlling the passage or non-passage of the light beam emitted by the external light source. Therefore, a corresponding backlight or front light module is usually required. The backlight or front light module The group can guide the light beam emitted by the external light source to the display panel to realize the display function. [0003] The light guide plate is an important component in the backlight module, such as figure 1 As shown, the light guide plate 105 is combined with the light source 101, the reflection sheet 103, the diffusion sheet 107 and the prism sheet 109 to form a backlight module, which provides ...

Claims

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Application Information

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IPC IPC(8): G02F1/1335G02B5/02G02B3/08G02B5/18
Inventor 余泰成
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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