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Plane light source device with secondary light conduction

A planar light source and secondary light guide technology, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems of local light concentration, uneven color mixing of backlight, etc.

Active Publication Date: 2010-02-03
EPISTAR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this component is only suitable for monochromatic light sources. If point light sources of different colors, such as red, green and blue light-emitting diodes, are mixed to produce white light as a backlight source, the backlight source produced by the above-mentioned backlight component will produce Inhomogeneous color mixing or partial spotlight occurs; in addition, it is still a problem in terms of manufacturing cost and component complexity

Method used

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  • Plane light source device with secondary light conduction
  • Plane light source device with secondary light conduction
  • Plane light source device with secondary light conduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] refer to Figure 1a , is a cross-sectional view of a planar light source device 1 with secondary light guiding along the x-axis direction according to a preferred embodiment of the present invention, including: a light source generating device 10, wherein the light source generating device includes red, green and blue Light-emitting components 101, 102, and 103 of colored light; a light mixing device 11, which is used to initially mix the light generated in the light source generating device to generally generate a mixed line light source; a planar light source generating device 12. The lower part of the planar light source generating device 12 is an arc-shaped surface, and the lower part of the planar light source generating device 12 includes a reflective layer 121, and the reflective layer 121 is used for the Light can be reflected back to the planar light source generating device to enhance light mixing efficiency. The upper part of the planar light source generatin...

Embodiment 2

[0043] refer to Figure 2a , is a cross-sectional view of a planar light source device 2 with secondary light guiding according to another preferred embodiment of the present invention, including: a light source generating device 10, a light mixing device 21, and the light mixing device 21 is used to initially mix the The light generated in the light source generating device makes it generally generate a mixed line light source; the planar light source generating device 22, wherein the upper part of the planar light source generating device 22 is composed of two slopes inclined from outside to inside and an astigmatism part 23, Used to receive the mixed line light source and generate a planar light source, the lower part of the planar light source generating device 22 includes a reflective layer, and the reflective layer is used to reflect the light emitted to the bottom of the planar light source generating device back to the surface Shaped light source generating device to e...

Embodiment 3

[0046] Such as Figure 3aAs shown, it is a cross-sectional view along the x-axis direction of a planar light source device 3 with secondary light guiding according to another preferred embodiment of the present invention, including: a light source generating device 10, a light mixing device 31, and the light mixing device 31 The device 31 is used to initially mix the light generated in the light source generating device so that it generally generates a mixed line light source; the planar light source generating device 32, wherein the upper part of the planar light source generating device 32 is two slopes inclined from outside to inside and the astigmatism part 33, used to receive the mixed line light source and generate a plane light source, the lower part of the planar light source generating device 32 is an arc-shaped surface, and the lower part of the planar light source generating device 32 includes a reflective layer 321, The reflective layer 321 is used to reflect the l...

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PUM

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Abstract

The plane light source device with secondary light condition includes one light source generator comprising at least two light emitting modules, which may generate light rays of different colors; onelight mixer to mix the light beams the light source generator generates initially to form one mixed linear light source; one area light source generator comprising one light scattering part to receivethe mixed light and generate one planar light source.

Description

technical field [0001] The invention relates to a planar light source device, in particular to a planar light source device with secondary light guide. Background technique [0002] Flat display devices such as liquid crystal displays are non-self-illuminating displays. Therefore, another device needs to provide a planar light source. This type of planar light source device is usually called a backlight assembly (Backlight). Backlight components can generally be divided into two types: Back Light Type and Edge Light Type; the components of traditional backlight components include lamps such as cold-cathode tubes, diffusers, etc. However, in order to disperse the light uniformly to provide an appropriate light source for the liquid crystal display, it is necessary to precisely control the distance between each light source and the distance between the light source and the diffuser and prism to avoid uneven illumination distribution. The components of the side light source ty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357
Inventor 陈怡名殷寿志陈俊昌许嘉良蔡嘉芬谢明勋
Owner EPISTAR CORP