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Coupling light element

A component and light source technology, which is applied in the field of light coupling components, can solve problems such as uneven bright bands/dark bands on the light coupling end surface of the light guide plate, and insufficient luminance of the light guide plate, so as to improve the phenomenon of uneven brightness and avoid damage to Bit error, the effect of improving the coupling efficiency

Inactive Publication Date: 2008-07-23
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the object of the present invention is to provide a light coupling element, which can solve the problem of insufficient luminance of the light guide plate caused by too low light coupling efficiency when the thickness of the light guide plate is smaller than the thickness of the light source, and reduce the light coupling end surface of the light guide plate. The problem of uneven light / dark bands

Method used

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  • Coupling light element
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Examples

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Effect test

no. 1 example

[0052] Please refer to image 3 , which is a three-dimensional schematic diagram of the light coupling element according to the first embodiment of the present invention. The light coupling element 300 in this embodiment includes a reflection cavity 302 , a light guide plate 304 and a light source 306 .

[0053] Wherein, the reflection cavity 302 has an opening 308 . The reflecting cavity 302 is composed of an upper surface 310 , a lower surface 312 , a first side surface 314 , a second side surface 316 and an end surface 318 corresponding to the opening 308 . The upper surface 310 and the lower surface 312 of the reflective cavity 302 are mirror reflection surfaces, and the reflection characteristics of the first side surface 314 , the second side surface 316 and the end surface 318 may be the same or different, which may be mirror reflection surfaces or diffuse reflections surface (diffusive reflector). In addition, the upper surface 310 of the reflection cavity 302 in th...

no. 2 example

[0060] Please refer to Image 6 , which is a schematic cross-sectional view of the light coupling element according to the second embodiment of the present invention. The light coupling element 400 of this embodiment is similar to the light coupling element 300 of the first embodiment, and the main difference is that the light source 306 is disposed inside the reflection cavity 302 and is located on the side of the end face 318 .

no. 3 example

[0062] Please refer to Figure 7 , which is a schematic cross-sectional view of the light coupling element according to the third embodiment of the present invention. The light coupling element 500 of this embodiment is similar to the light coupling element 300 of the first embodiment, but the main difference is that the light source 306 is disposed on the end face 318 , and part of the light source 306 is located outside the reflection cavity 302 .

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Abstract

The invention discloses an optical coupler, which comprises a reflection chamber, at least one light source and a light guide plate, wherein the reflection chamber is provided with one mouth, which comprises an upper surface, a low surface, a first side face, a second side face and an end face relative to the mouth, the light source is arranged on the end face, the side face of the light guide plate is conjugated with the mouth, and the light guide plate is thinner than the light source.

Description

technical field [0001] The invention relates to a light-coupling element, in particular to a light-coupling element which can solve the problem of insufficient light-emitting brightness of the light-guide plate due to the low light-coupling efficiency when the thickness of the light-guide plate is smaller than that of the light source, and can improve the uniformity of light-emitting . Background technique [0002] Liquid crystal displays (LCDs) have gradually replaced displays such as cathode ray tubes (CRTs) due to their unique advantages of small size and low power consumption. However, since the liquid crystal panel is a device that does not emit light by itself, the liquid crystal display needs a backlight module as its light source to display normally. Currently, a backlight module commonly used in liquid crystal displays is usually composed of light emitting elements such as a light emitting diode (LED) array and a light guide plate of appropriate size. Please refer...

Claims

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Application Information

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IPC IPC(8): G02B6/26G02B6/00
Inventor 张延瑜
Owner IND TECH RES INST
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