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Line light source and LCD (liquid crystal display) device

A technology of line light source and point light source, applied to the field of line light source and liquid crystal display device, can solve the problems of uneven brightness, limited lighting range of light-emitting diodes, and high cost, and achieve the effect of expanding the lighting range and improving lighting uniformity

Active Publication Date: 2012-05-23
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a point light source, light-emitting diodes have a limited illumination range. Existing edge-lit liquid crystal display devices need to use multiple light-emitting diodes arranged in a line as side light sources. In order to ensure good optical characteristics of the backlight module, such as uniformity of light emission, It is necessary to keep the distance between two adjacent light-emitting diodes from being too large, so it is necessary to use a large number of light-emitting diodes, and the cost is high
Correspondingly, if the number of light-emitting diodes used is reduced, it is easy to cause uneven brightness and darkness in the backlight module, which reduces the uniformity of light emission of the backlight module.

Method used

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  • Line light source and LCD (liquid crystal display) device
  • Line light source and LCD (liquid crystal display) device
  • Line light source and LCD (liquid crystal display) device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, one of the linear light sources 2 in this embodiment includes a white light point light source 21(0) emitting white light and a linear light-conducting element 22, and the linear light-conducting element 22 is used to turn the white light point light source 21(0) The emitted light is converted to a line light source. The light conducting element 22 includes an incident surface 221 , an outgoing surface 222 and a total reflection surface 226 . Wherein, the white light point light source 21 (0) is arranged adjacent to the incident surface 221, and the light emitted enters the linear light-conducting element 22 through the incident surface 221, and the total reflection surface 226 is a total reflection structure, which is used to make the light enter the linear light-conducting element 22. The light propagates in the linear light-conducting element 22 through total reflection, and the exit surface 222 extends along the length direction of the li...

Embodiment 2

[0054] Such as Figure 10 As shown, the line light source 2 in this embodiment includes a red point light source 21(1), a green point light source 21(2), a blue point light source 21(3) and a linear light-conducting element 22, the light The conductive element 22 includes an incident surface 221 , an outgoing surface 222 and a total reflection surface 226 . Wherein each point light source 21(1), 21(2), 21(3) is arranged adjacent to the incident surface 221, and the light emitted by each point light source enters the light-conducting element 22 through the incident surface 221; the total reflection surface 226 is a total reflection structure, It is used to make the light entering the inside of the light-conducting element 22 propagate inside the light-conducting element 22 through total reflection; the exit surface 222 extends along the length direction of the light-conducting element 22, and makes the inside of the light-conducting element 22 reach the exit by destroying the t...

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Abstract

The invention discloses a line light source and an LCD (liquid crystal display) device, relates to the technical field of liquid crystal display, and provides the line light source for displaying color sequences, which is invented for reducing the using number of point light sources. The line light source comprises at least one point light source and a linear light conduction component, wherein the light conduction component comprises an incident plane, an emergent plane and a fully reflecting plane; the point light sources are adjacent to the incident plane; light rays emitted from the point light sources enter the light conduction component through the incident plane; the fully reflecting plane is in a fully reflecting structure and is used for making the light rays which enter the light conduction component propagated in the light conduction component through full reflection; and the emergent plane is extended along the length direction of the light conduction component and makes partial light which reaches the emergent plane from the inner side of the light conduction component emerge by destroying full reflection conditions. The line light source and the LCD device can be used for the liquid crystal display.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a line light source and a liquid crystal display device. Background technique [0002] Liquid crystal display devices have the advantages of light weight, small size, and low power consumption, and are widely used in products such as computers, mobile communication terminals, and personal digital assistants. [0003] Because the liquid crystal itself does not emit light, it is necessary to provide it with a backlight module to assist it in realizing the display function. Currently, cold cathode fluorescent tubes are usually used as light sources in backlight modules. Although cold cathode fluorescent lamps have the advantages of high luminous brightness, they also have disadvantages such as poor uniformity of luminescence, short life, narrow color gamut, high operating voltage (high power consumption), and environmental pollution (mercury). For this reason, the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V8/00F21V19/00F21V13/00F21V17/00G02F1/13357
Inventor 马若玉
Owner BOE TECH GRP CO LTD