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Backlight source

A technology of backlight source and light source, applied in the field of backlight source, can solve the problems of reducing the utilization efficiency of light source, light loss, etc., and achieve the effects of avoiding absorption loss, improving utilization rate, and improving luminous brightness.

Inactive Publication Date: 2011-06-29
PHOEBUS VISION OPTO ELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many of the above situations will cause serious light loss and reduce the utilization efficiency of the light source.

Method used

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Experimental program
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Embodiment 1

[0034] Figure 2(a) is a top view of a backlight made of side-emitting optical fibers, and Figure 2(b) is a front cross-sectional view of the substrate, image 3 It is a picture of a side-emitting optical fiber after secondary preparation of the present invention. FIG. 2( a ) includes a substrate 1 , a groove 2 on the substrate 1 , a side-emitting optical fiber 3 and a light source 12 . image 3 It includes bare optical fiber 5 and total reflection film 6 . In this embodiment, the substrate 1 is rectangular, and in other embodiments, it can also be non-rectangular. The size of the substrate 1 is related to the size of the liquid crystal screen. The size of the liquid crystal screen is smaller than the substrate 1, that is, to avoid the uneven reflection of light at the edge of the substrate 1. parts. As shown in FIG. 2( a ), there is a groove 2 on one side of the substrate 1 , and the diameter of the groove 2 is preferably such that the side-emitting optical fiber 3 can be st...

Embodiment 2

[0041] Figure 9 It is a top view of another embodiment of a backlight made of a side-emitting optical fiber according to the present invention, which includes a side-emitting optical fiber 3 , a light guide plate 11 and a light source 12 . 10( a ) and FIG. 10( b ) are left side views of a backlight made of single and multiple side-emitting optical fibers corresponding to Embodiment 2, both of which include side-emitting optical fibers 3 and a light guide plate 11 . The light guide plate 11 is rectangular in this embodiment, but of course it can also be in other shapes. The side light-emitting optical fiber 3 is wound around the side of the light guide plate 11 for one or more turns, and ensures that the arc-shaped light-emitting surface fits the light guide plate 11, and the light source 12 emits light. The light is coupled into the side-emitting optical fiber 3, and the light is emitted from the side-emitting optical fiber 3 and is incident on the light guide plate 11, and i...

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Abstract

The invention provides a backlight source which illuminates uniformly by using a lateral luminescent fiber as an illuminant, comprising a substrate, a pressplate, a lateral luminescent fiber which is embedded in the groove between the substrate and the pressplate, and a light source connected with the incoming end of the lateral luminescent fiber; and both the outgoing end of the lateral luminescent fiber and the circumferential surface at one side of the substrate are plated with an all-trans film. The invention can improve the use ratio of the light source light, and has the characteristicsof uniform luminosity and chromaticity, no torsion of margin light and the like. In addition, the light source of the lateral luminescent fiber is placed at the margin end of a liquid crystal screen,being conducive to improving the uniformity of output light field.

Description

technical field [0001] The invention belongs to the technical field of light sources, and in particular, the invention relates to a uniformly luminous backlight using a side-emitting optical fiber as a luminous body. Background technique [0002] The traditional LCD backlight can be roughly divided into the direct type and the side light type according to its structure. The direct type is to install a light guide plate directly under the liquid crystal panel, and set a light source at the edge of the light guide plate, and the scattered light emitted by the light guide plate illuminates the liquid crystal. panel. Many light sources can be installed in the directly below type, so it is easy to achieve high brightness, but it is difficult to reduce the thickness; in the side light type, the light source is located on one side of the reflector, and the thinner backlight can be realized by making the light guide plate very thin , but the light source setting space is limited, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357G02B6/00G02B1/10
Inventor 王斌毕勇成华梅东滨王宇贾中达
Owner PHOEBUS VISION OPTO ELECTRONICS TECH
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