High-directivity backlight module

A backlight module, high pointing technology, applied in the direction of nonlinear optics, optics, light guide, etc., can solve the problem of prolonging battery life, achieve the effect of reducing energy consumption, high collimation characteristics, and improving optical utilization

Inactive Publication Date: 2014-07-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The light utilization rate of traditional liquid crystal displays is only 6%-10%. For notebook computers, the power consumption of liquid crystal displays is 40%-50% of the total. If the optical utilization rate can be improved and the power consumption can be reduced, the battery life can be greatly extended time

Method used

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Embodiment Construction

[0022] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention. Detailed implementation modes and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following Examples.

[0023] In a preferred embodiment of the present invention, such as Figure 1-3 As shown, a highly directional backlight module includes a highly collimated light source 10 and a light guide plate. The high-collimation light source is a light-emitting diode. In other alternative embodiments, it can also be an organic light-emitting diode, laser, or a spontaneously formed or modulated light source with high directivity. The light guide plate is a hexahedron composed of a first side surface 31, a second side surface 32, a third side surface 33, a fourth side surface 34, a bottom surface 21 and...

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Abstract

The invention discloses a high-directivity backlight module. The high-directivity backlight module comprises a high-collimation light source and a light guide board, wherein the light guide board is a hexahedron composed of a first side surface, a second side surface, a third side surface, a fourth side surface, a bottom surface and a top surface, the second side surface, the third side surface and the bottom surface are respectively of a micro-structure, light which is emitted by the high-collimation light source and penetrates through the first side surface can be totally reflected through the microstructures and reflected out through the top surface finally, and a light source is provided for display equipment. According to the high-directivity backlight module, the half-height and full-width number of an emergent light field can be greatly reduced, emergent light has the high-collimation characteristic, the optical use ratio can be effectively increased, and therefore energy consumption of the display equipment is reduced.

Description

Technical field [0001] The invention relates to a backlight module, in particular to a high-directivity backlight module that can improve optical utilization and reduce power consumption. Background technique [0002] The application of liquid crystal displays has been very extensive, including mobile phones, tablet computers, car monitors, TVs and so on. However, the TFT-LCD display is an involuntary light-emitting display and requires an external backlight module to provide a flat light source. The traditional side-emitting backlight module uses a light guide plate to form a planar light source. In addition to the LED light source, the light guide plate, the reflective sheet, and the diffuser, the main components include at least two perpendicular light collecting prism sheets, whose function is to limit the light output angle. Most of the light is emitted from the front viewing angle + / -22-25°, and the rest of the light is retroreflected and reused to achieve the effect of li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V8/00G02F1/13357
Inventor 王祎君陆建钢谢汉萍
Owner SHANGHAI JIAO TONG UNIV
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