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Light source, backlight module using same, and liquid crystal display device using same

A technology of backlight module and light source, which is applied in the direction of electric light source, lighting device, light source fixing, etc. It can solve the problems of reducing the light utilization rate of reflected light and light leakage, etc., and achieve the effect of reducing the light-emitting angle and improving the coupling efficiency

Inactive Publication Date: 2011-01-26
INNOLUX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material of the reflector lampshade 240 is usually aluminum, which is a material that easily absorbs light, thus reducing the light utilization efficiency of the reflected light.
In addition, due to the characteristic that the divergence angle of the light emitting diode 220 is about 120 degrees, part of the light still leaks through the gap between the light guide plate 230 and the reflector lampshade 240

Method used

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  • Light source, backlight module using same, and liquid crystal display device using same
  • Light source, backlight module using same, and liquid crystal display device using same
  • Light source, backlight module using same, and liquid crystal display device using same

Examples

Experimental program
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Effect test

no. 1 example

[0051] Please refer to image 3 and Figure 4 , image 3 A schematic diagram showing a liquid crystal display device according to a first embodiment of the present invention, Figure 4 draw image 3 A side view of a liquid crystal display device. The liquid crystal display device 300 includes a liquid crystal display panel 310 and a backlight module 320 . The backlight module 320 is disposed on one side of the liquid crystal display panel 310 and includes a circuit board 330 , at least one LED 340 , at least one lens 350 and a light guide plate 360 ​​. The LED 340 is electrically connected to the circuit board 330 and includes a base 342 , a chip 344 and a package 346 . The chip 344 is disposed on the base 342 and can be, for example, a blue light emitting diode chip (LED chip), but the chip 344 can also be a light emitting diode chip of other colors or other chips capable of emitting light. The lens 350 is disposed on the package body 346 corresponding to the LED 340 , ...

no. 2 example

[0059] The difference between the second embodiment and the first embodiment lies in the bonding method of the lens and the light emitting diode, and other similarities with the first embodiment will not be repeated here. In this embodiment, the lens is fixed on the base of the light emitting diode by the fixing post and the hole. Please refer to Figure 7 , which shows a schematic diagram of a light emitting diode and a lens according to a second embodiment of the present invention. In this embodiment, the lens 450 has fixing columns 451a and 451b, and the fixing columns 451a and 451b extend toward the base 442 and respectively have flanges 452a and 452b. The two ends of the base 442 of the light-emitting diode 440 have holes 441a and 441b respectively. The flanges 452a and 452b are respectively clamped to the base 442 through the holes 441a and 441b to connect the lens 450 to the base 442. The fixing columns 451a and 451b can be connected with the lens. 450 is integrally m...

no. 3 example

[0062] The difference between the third embodiment and the first embodiment lies in the arrangement of the lens. In this embodiment, the lens is fixed on the circuit board, and the rest of the similarities with the above-mentioned first embodiment will not be repeated. Please refer to Figure 8 , which shows a schematic diagram of a light emitting diode, a lens and a circuit board according to a third embodiment of the present invention. In this embodiment, the lens 550 has fixing columns 551a and 551b, and the fixing columns 551a and 551b extend toward the circuit board 530 and have flanges 552a and 552b respectively, and the circuit board 530 has holes 531a and 531b, and the flanges 552a and 552b The circuit board 530 is clamped through the holes 531a and 531b, so as to connect the lens 550 to the circuit board 530. The fixing columns 551a and 551b can be integrally formed with the lens 450 by, for example, transparent resin and injection molding.

[0063] In this embodimen...

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Abstract

The invention discloses a light source, a backlight module using the same and a liquid crystal display device using the same. The light source comprises a base, a chip and a lens. The chip is arranged on the base. The lens has a flat surface, a curved surface and a long-axis direction. The flat surface is arranged relative to the curved surface. The chip is used for emitting a light beam passing through the lens. The light beam has a first direction light-emitting angle on a plane vertical to the long-axis direction. The curved surface has a curvature on the plane vertical to the long-axis direction. The first direction light-emitting angle of the light beam before entering the lens is greater than the first direction light-emitting angle of the light beam exiting from the lens. In the invention, the light-emitting angle of a light-emitting diode on a plane vertical to a light guide plate can be reduced, and thus, the efficiency of the light coupling between the light-emitting diode and the light guide plate is improved.

Description

【Technical field】 [0001] The present invention relates to a light source, a backlight module and a liquid crystal display device using the same, and in particular to a light source capable of reducing the light emitting angle of a chip, a backlight module and a liquid crystal display device using the same. 【Background technique】 [0002] Due to the advantages of low driving voltage, low pollution, light weight, and small size, light emitting diodes (LEDs) have become one of the main light sources for backlight modules in future liquid crystal display devices. Taking notebook computers as an example, LEDs are mostly used as the light source of edge-lit backlight modules at present, and the light emitted by the LEDs is received by the light guide plate, so that the light is guided to the liquid crystal display panel through the light guide plate. [0003] Due to the unique structure of the light-emitting diode, the divergence angle of the light emitted by it in the horizontal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V5/04H01L33/00F21V8/00F21V19/00G02F1/13357G02F1/1333
Inventor 郭家彰
Owner INNOLUX CORP
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