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Hybrid backlight driving apparatus for liquid crystal display

一种液晶显示器、背光驱动的技术，应用在照明装置、静态指示器、光学等方向，能够解决驱动效率减小、低效率、制造成本增加等问题

Active Publication Date: 2007-07-04
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since such a step-up converter has lower efficiency and requires many parts or elements compared with a step-down (buck) converter, the driving efficiency of a plurality of LEDs is reduced, and the manufacturing cost is due to many parts or elements required. component increases

Method used

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  • Hybrid backlight driving apparatus for liquid crystal display
  • Hybrid backlight driving apparatus for liquid crystal display
  • Hybrid backlight driving apparatus for liquid crystal display

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Embodiment Construction

[0040] FIG. 4 shows the structure of a backlight driving device in a liquid crystal display according to an embodiment of the present invention. The liquid crystal display may further include conventional elements such as a liquid crystal display panel, a timing controller, a gate driving voltage generator, a data driver, a gate driver, a gamma reference voltage generator, a common voltage generator, and the like.

[0041] Referring to FIG. 4 , a backlight driving apparatus 300 includes a rectifier 210 , a smoothing filter 220 and a power factor corrector 230 similar to those in the backlight driving apparatus 200 shown in FIG. 3 . In addition, the backlight driving apparatus 300 includes a backlight assembly 310 including a plurality of lamps 311 and a plurality of light emitting diodes (LEDs) 312, converts DC 400V applied from the power factor corrector 230 into a lamp driving voltage and supplies it to the lamps 311. and a light emitting diode driver 330 that converts DC 40...

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Abstract

A hybrid backlight driving apparatus for a liquid crystal display device for driving a backlight assembly is provided. The hybrid backlight assembly has a plurality of lamps and a plurality of light emitting diodes. The hybrid backlight driving apparatus, as embodied, includes: a lamp inverter for converting a first DC voltage into a lamp driving voltage and supplying the lamp driving voltage to the plurality of lamps; and a light emitting diode driver for converting the first DC voltage into a light emitting diode driving voltage and supplying the light emitting diode driving voltage to the plurality of light emitting diodes.

Description

[0001] This application claims priority to Patent Application No. 10-2005-130814 filed in Korea on December 27, 2005, the entire contents of which are incorporated herein by reference. technical field [0002] The present invention relates to a liquid crystal display, and more particularly, to a hybrid backlight driving device for a liquid crystal display, wherein a high voltage can be converted into a driving voltage of the hybrid backlight to supply lamps and light emitting diodes of the liquid crystal display. Background technique [0003] In general, a liquid crystal display (LCD) controls light transmittance of a liquid crystal cell according to a video signal, thereby displaying an image. An active matrix type liquid crystal display having a switching device for each liquid crystal cell is advantageous in displaying moving images by allowing active control of the switching device. A switching device for an active matrix type liquid crystal display mainly uses a thin fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/34G09G3/20G02F1/133
CPCH05B33/0818H05B35/00G02F1/133604G09G3/3406G02F2001/133612G02F1/133603H05B33/086H05B45/20H05B45/382G02F1/133612H05B45/39G02F1/1335H05B41/26H05B45/3725
Inventor 田镇焕张熏
Owner LG DISPLAY CO LTD
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