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Backlight module with a heat conductive block

a backlight module and heat conductive block technology, applied in the field of backlight modules, can solve the problem of shortening the life of leds

Inactive Publication Date: 2007-06-28
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] An advantage of the present invention is to provide a heat conductive block positioned between the LED and the bezel, which serves as a heat-transferring bridge between the LED and the bezel. For the LED at the corner of the bezel, since the heat conductive block contacts the edge and the bottom surfaces of the bezel, heat generated by the LED is able to be dissipated quickly through the heat conductive block.
[0010] These and other objectives of the claimed invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.

Problems solved by technology

Nevertheless, luminance of the LED is inverse proportion to its operating temperature and thus shortens the life span of the LED, and how to improve the heat dissipation in order to lower operating temperature of the LED is a main goal for backlight module manufacturers.

Method used

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  • Backlight module with a heat conductive block
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  • Backlight module with a heat conductive block

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Embodiment Construction

[0014] Please refer to FIGS. 2 and 3. FIG. 2 shows a diagram of a backlight module 20 according to the present invention, and FIG. 3 is a partially enlarged diagram of the backlight module 20 depicted in FIG. 2. The backlight module 20 comprises a bezel 26 and a plurality of light emitting diodes (LEDs) 22 disposed at the corners of the bezel 26. A bottom surface 32 of the bezel 26 is used for positioning such optical components as a light guide plate, a diffusion sheet, and a brightness enhancement film, for simplicity, not shown in FIG. 2. Also, the plurality of light emitting diodes (LEDs) 22 is disposed on a circuit board 24. A heat conductive block 30 is positioned between the circuit board 24 and the bezel 26. Both the heat conductive block 30 and the bezel 26 are made of metal (e.g. aluminum) or other materials having high thermal conductivity.

[0015] When the LED 22 emitting light triggered by a driver (not shown) via a pin 28, heat is generated. The emitted light is guided ...

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PUM

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Abstract

A backlight module includes a bezel having at least one edge, a circuit board, one or more light emitting diodes connected to the circuit board for emitting light. Each light emitting diode has a light axis which is neither parallel nor vertical to the edge of the bezel. The backlight module utilizes a heat conductive block disposed between the bezel and the light emitting diode for transferring heat generated by the light emitting diode to the bezel.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a backlight module, and more particularly, to a backlight module capable of arising heat dissipation. [0003] 2. Description of the Related Art [0004] A backlight module is a key component of a liquid crystal display (LCD). The purpose of the backlight module is to provide a sufficient-brightness and an even-distribution of light on surface to the LCD panel. Because the LCD is widely used in various electronic products such as monitors for notebook computers, digital cameras, and projectors, the demand for the backlight module has increased tremendously. [0005] In addition to cold cathode fluorescent lamps (CCFLs), light emitting diodes are increasingly used in medium and large size liquid crystal displays. Please refer to FIG. 1, which shows a prior art backlight module 10 having a plurality of light emitting diodes disposed on a bezel. Conventionally, the plurality of LEDs 12 are di...

Claims

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Application Information

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IPC IPC(8): F21V7/04
CPCF21V29/004F21Y2101/02F21V29/89F21V29/87G02F2001/133628F21Y2115/10G02F1/133628F21V29/70
Inventor WU, MENG-CHAILO, CHI-CHUNGHSIEH, CHIN-KUNLAI, CHENG-CHIHCHENG, CHI-CHEN
Owner AU OPTRONICS CORP