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Blacklight module and LCD device thereof

A liquid crystal display device and backlight module technology, applied in lighting devices, optics, light guides, etc., can solve the problems of inability to ensure uniform light distribution, difficult implementation, and high cost of side-lit LED backlight sources, and improve the phenomenon of uneven light distribution , avoid the effect of Hot-spot

Inactive Publication Date: 2013-10-02
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned improved edge-lit LED backlight generally has technical defects such as high cost, difficult realization and inability to ensure uniform light distribution.

Method used

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  • Blacklight module and LCD device thereof
  • Blacklight module and LCD device thereof
  • Blacklight module and LCD device thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The backlight module provided by the embodiment of the present invention, such as image 3 As shown, the backlight module includes: LGP 8, and several LEDs 4 adjacently arranged on the side of LGP 8. The light exit 10 of LED 4 emits fan-shaped columnar light into LGP 8, and the plane where the bottom surface of LGP 8 is located is the horizontal plane. , then the uppermost outgoing light 9 of the fan-shaped columnar light emitted by the light exit 10 of the LED 4 enters the LGP 8 horizontally, and the side of the LGP 8 opposite to the LED 4 is a slope 13 at a certain angle to the bottom surface of the LGP 8 .

[0035] In order to avoid that part of the outgoing light 9 emitted by the light exit 10 of the LED 4 directly hits the liquid crystal panel 2, the LED 4 is set at a certain angle relative to the LGP 8, and the side of the LGP 8 is set at a certain angle relative to the LED4. Slope 13, so that the outgoing light 9 of the top (upper boundary) of the fan-shaped colu...

Embodiment 2

[0042] The present invention also provides a liquid crystal display device, such as Figure 4 As shown, it includes: a backlight module and a frame, wherein the backlight module includes: LGP 8, and several LEDs 4 adjacently arranged on the side of LGP 8, and the light emitting part 10 of LED4 emits fan-shaped columnar light and enters LGP 8, with the LGP 8 The plane where the bottom surface is located is a horizontal plane, then the uppermost outgoing light 9 of the fan-shaped columnar light emitted by the light exit 10 of the LED 4 enters the LGP 8 horizontally, and the side of the LGP 8 opposite to the LED 4 is in a certain shape with the bottom surface 15 of the LGP 8. Angled slope 13.

[0043] The backlight module is arranged in the frame.

[0044] The liquid crystal display device also includes: a reflective film 6 , an optical module 3 and a liquid crystal panel 2 . The reflective film 6 is arranged on the bottom side of the LGP 8; the optical module 3 is arranged on ...

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Abstract

The invention refers to the technical field of liquid crystal display and discloses a blacklight module and a liquid crystal display device thereof; the invention can solve the problem that hot-spots occur on incident light area of side-lighting light emitting diode (LED) backlight. The blacklight module comprises a light guide plate and a plurality of LEDs arranged near the side surface of the light guide plate. The light exit of the LEDs emits sector-cylindrical lights to the light guide plate, with the plane the light guide plate bottom lies on as a horizontal plane, the top emitting lights of the sector-cylindrical lights emitted by the LED exit horizontally enter the light guide plate; the side surface of the light guide plate facing the LEDs forms a certain angle slope with the light guide plate bottom. The invention is used for adjusting light distribution of side-lighting LED backlight to make the light distribution more even.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a backlight module and a liquid crystal display device thereof. Background technique [0002] A liquid crystal display device uses a liquid crystal panel for display, and since the liquid crystal panel itself does not emit light, it is necessary to provide a light source with sufficient brightness and uniform light distribution for the liquid crystal panel. Currently, edge-lit backlights or direct-lit backlights are generally used to provide light sources for liquid crystal display devices. [0003] Among side-lit backlights, Light Emitting Diode (LED) backlights are more commonly used, which adopts a plurality of non-continuous LEDs arranged in a line to replace the traditional linear CCFL backlight. LED is a point illuminant, and its luminous state is fan-shaped columnar emission, and the most commonly used angle is 120°. LED not only has the advantages of thin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357F21V8/00F21Y101/02
Inventor 康方尹大根崔来友布占场陈吉马青
Owner BOE TECH GRP CO LTD
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