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Backlight module

A backlight module and light source technology, applied in optics, optical components, nonlinear optics, etc., can solve problems such as affecting light coupling efficiency

Inactive Publication Date: 2005-07-27
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, since there is an air gap S between the light source L and the light guide element G, this will cause part of the light to be reflected by the light guide element G and affect the light coupling efficiency between the light source L and the light guide element G

Method used

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Embodiment Construction

[0031] See first figure 2 , which is a schematic diagram showing an edge-lit backlight module of the present invention. As shown in the figure, a plurality of light sources L are embedded in the recesses D located on both sides of the light guide element G, wherein the surface of each recess D is respectively provided with an optical film layer T. In this embodiment, the aforementioned light source L is a light emitting diode (LED), and the optical film layer T is interposed between the light source L and the light guide element G. The above-mentioned optical thin film layer T can be formed on the surface of the recessed portion D by vacuum coating or sticking, thereby improving the light coupling efficiency between the light source L and the light guide element G.

[0032] The present invention is characterized in that: the refractive index N of the aforementioned optical film layer T is between the refractive index Ns of the light guide element G and the refractive index N...

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Abstract

A back light module consists of a light source, a light element and an optical film layer. It features that optical film layer is set on light element surface as film refractivity is between refractivities of the light element and the air, the said light source launches a light to enter internal of light element through optical film layer.

Description

technical field [0001] The invention relates to a backlight module, in particular to a backlight module capable of improving the light coupling efficiency between a light source and a light guide element. Background technique [0002] See first Figure 1A , which shows a schematic diagram of a light source and a light guide plate in an edge-lit backlight module in the prior art. As shown in the figure, in a prior art edge-lit backlight module, the light source L (such as a light emitting diode) is arranged on the side of the light guide element G, and the light source L can inject light into the light guide element G to form a One side light source. However, since there is an air gap S between the light source L and the light guide element G, part of the light will be reflected by the light guide element G, which seriously affects the light coupling efficiency between the light source L and the light guide element G. [0003] see again Figure 1B , which is a schematic di...

Claims

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Application Information

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IPC IPC(8): G02B1/10G02B1/11G02F1/1335
Inventor 高克嘉陈志光黄志濠廖经桓
Owner AU OPTRONICS CORP