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Lamp driving apparatus for liquid crystal display device

一种驱动装置、背光驱动的技术，应用在照明装置、静态指示器、仪器等方向，能够解决很难提高对比度等问题

Inactive Publication Date: 2008-10-08
LG PHILIPS LCD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, it is difficult to improve the contrast due to the characteristics of the lamp

Method used

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  • Lamp driving apparatus for liquid crystal display device
  • Lamp driving apparatus for liquid crystal display device
  • Lamp driving apparatus for liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Reference will now be made in detail to a preferred embodiment of the invention, which embodiment is illustrated in the accompanying drawings.

[0024] image 3 is a block diagram illustrating an embodiment of a lamp driving device of an LCD device according to the present invention. As shown in the figure, the lamp driving device includes: a timing controller 31, which outputs control signals and digital video data (RGB) for controlling the driving of the gate driving unit 32 and the data driving unit 33, and outputs a brightness control signal ( Vbr); gate drive unit 32, which provides scan signals to the grid lines (GL1-GLn) on the liquid crystal panel 34 by controlling the timing controller 31; data drive unit 33, which controls the timing controller 31 to the liquid crystal panel 34 The data lines (DL1~DLm) provide the data voltage; the liquid crystal panel 34 has m×n liquid crystal cells arranged in a matrix and connects the m data lines (DL1~DLm) and the n gate ...

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PUM

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Abstract

Disclosed is a technology for implementing a high contrast ratio that cannot be implemented by only an analog dimming or burst dimming method, by selectively turning off lamps on the LCD device, comprising: a control unit outputting control signals and video data for controlling a driving of a gate driving unit and a data driving unit, and brightness control signals; the gate driving unit for supplying scan signals to gate lines on a liquid crystal panel by controlling of the control unit and the data driving unit for supplying a data voltage to data lines; the liquid crystal panel having liquid crystal cells arranged in a matrix type and thin film transistors formed at each intersection between the data lines and the gate lines; a backlight driving unit for controlling an optical amount by controlling a tube current supplied to lamps on a backlight unit and for selectively turning off the lamps when the brightness control signals are inputted; and the backlight unit for implementing a high brightness with respect to a dark area by irradiating a backlight having a brightness corresponding to light from the lamps emitted by the backlight driving unit toward the liquid crystal panel, and turning off some of the lamps.

Description

field of invention [0001] The invention relates to a backlight driving technology of an LCD (liquid crystal display) device, in particular to a lamp driving device of an LCD device, which can realize a high contrast ratio that cannot be realized only by an analog dimming method or a pulse dimming method. Background technique [0002] With the development of IT (Information Technology) in recent years, display devices play an important role as a medium for displaying visual information. In order to gain attention in the future, display devices must satisfy the following conditions, such as low power consumption, thin thickness, light weight, high image quality, and the like. [0003] An LCD device is a typical display device of a flat panel display device, and displays images by using optical anisotropy of liquid crystals. LCD devices have the advantages of thinness, small size, low power consumption, and high image quality, and thus are being developed as main products of f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/36G09G3/36G02F1/133
CPCG09G3/342G09G3/2014G09G2310/024G09G2320/0646G09G2320/066G02F1/133G09G3/36
Inventor 金铉承林钟皓
Owner LG PHILIPS LCD CO LTD
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