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Backlight module and liquid crystal display

A liquid crystal display and backlight module technology, applied in static indicators, instruments, optics, etc., can solve problems such as high temperature, reduced life of LED14, and reduced luminous efficiency of LED14, and achieve the effect of excessively high ground temperature

Active Publication Date: 2010-12-22
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the converter 16 must output a large current to drive all the LEDs 14 at the same time, the high current will also cause potential problems such as overheating
Excessive temperature will not only reduce the lifespan of LED 14, but also reduce the luminous efficiency of LED 14

Method used

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  • Backlight module and liquid crystal display
  • Backlight module and liquid crystal display
  • Backlight module and liquid crystal display

Examples

Experimental program
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Embodiment Construction

[0018] see figure 2 , figure 2 is a schematic diagram of the liquid crystal display 20 according to the first embodiment of the present invention. The liquid crystal display 20 includes a power terminal 21 , a liquid crystal display panel 30 and a backlight module 10 . The backlight module 10 utilizes the voltage provided by the power terminal 21 to generate the light required by the liquid crystal display panel 30 . The backlight module 10 includes a first light emitting device 22 , a second light emitting device 24 , a switch signal generator 25 , a first switch 26 and a second switch 28 . The power terminal 21 is used to provide a DC supply voltage V DC . The liquid crystal display panel 30 includes a liquid crystal layer for displaying images. The first light emitting device 22 and the second light emitting device 24 include a single light emitting diode 32 or a plurality of light emitting diodes 32 connected in series. One end of the first light emitting device 22...

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PUM

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Abstract

The invention discloses a backlight module and a liquid crystal display, driving a light-emitting diode by a staggering control method. In the invention, two converters are utilized to respectively drive two sets of light-emitting diodes in a staggering mode to enable the two sets of the light-emitting diodes to be switched on in turn under a same switch period, and therefore, each set of the light-emitting diodes can be in a switched-off state within half of a working period. Because each set of the light-emitting diodes can be in the switched-off state within half of the time under the same switch period, the problem of overhigh temperature generated by simultaneously lightening all the light-emitting diodes can be efficiently solved, and the heat energy generated in the lightening process of the light-emitting diodes can be effectively reduced.

Description

technical field [0001] The invention relates to a backlight module and a liquid crystal display using the backlight module, in particular to a backlight module and a liquid crystal display for interlacedly driving light-emitting devices. Background technique [0002] Displays with advanced functions have gradually become an important feature of today's consumer electronics products. Liquid crystal displays have gradually become widely used in various electronic devices such as mobile phones, personal digital assistants (PDAs), digital cameras, computer screens or notebook computer screens. monitor with high resolution color screen. [0003] Backlight module (Back light module) is one of the key components of LCD panel (Liquid crystal display panel, LCD panel). Since the liquid crystal itself does not emit light, the function of the backlight module is to supply sufficient brightness and evenly distributed light source. The simple and effective light mechanism converts it in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/34G02F1/133G02F1/13357H05B44/00
CPCG02F2001/133613G02F2001/133628G02F2001/133612G02F1/133603G09G2330/025H05B33/0854G09G3/3406H05B45/38Y02B20/30H05B45/3725G02F1/133612G02F1/133613G02F1/133628
Inventor 贺成明杨景元
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD