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Liquid crystal screen drive method and device therefor

A screen and liquid crystal technology, applied in the field of liquid crystal screen drive method and its device, can solve the problems of long data line rise time and energy consumption, etc.

Inactive Publication Date: 2008-05-14
SUNPLUS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depend on Figure 4 It is shown that when the common voltage node is reversed, the signal driving circuit 110 needs to drive the data line to the target voltage, which not only consumes a lot of energy, but also the rising time of the data line is very long, so the existing LCD screen driving method still room for improvement

Method used

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  • Liquid crystal screen drive method and device therefor
  • Liquid crystal screen drive method and device therefor
  • Liquid crystal screen drive method and device therefor

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Embodiment Construction

[0032] The present invention uses charge sharing to reduce the power consumption of the liquid crystal screen. That is, when the voltage of the common voltage node (Vcom) is reversed, the data line and the common voltage node are short-circuited, and the charge of the common voltage node (Vcom) and the charge of the data line are neutralized to reduce the impact on the data line and the common capacitance. charging.

[0033] For a description of the preferred embodiments of the present invention, please refer to Figure 5 The circuit diagram shown. For the convenience of description, the panel includes 4 scanning lines (SL1-SL4) 502, 3 data lines (DL1R, DL1G, DL1B) 504, 12 pixels 506, a gate driving circuit 508, and a signal driving circuit 510 , three switches (SW1R, SW1G, SW1B) 512 , a switch control circuit 514 , a common capacitor 516 and a common voltage drive circuit 526 .

[0034] For the convenience of explanation, Figure 5 Only 4 scan lines (SL1-SL4) 502 and 3 da...

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Abstract

The disclosed LCD screen comprises: multiple switches / data lines, a signal drive circuit to generate video signal, a co-voltage drive circuit, and a co-capacitor with one end coupled to the signal drive circuit through a co-voltage node. The opposite drive method comprises: conducting switches, shorting drive circuits to send the charges to data lines; driving the co-voltage node into reversed phase state, conducting and closing switches to sample line data voltage.

Description

technical field [0001] The invention relates to the technical field of flat panel displays, in particular to a method and device for driving a liquid crystal screen. Background technique [0002] With the development of the electronic industry, the current portable electronic products have gradually flooded our daily life, such as mobile phones, personal digital assistants (PDAs), MP3 players and so on. These portable electronic products usually have a small liquid crystal display (LCD), generally a thin-film transistor liquid crystal display (Thin-Film Transistor LCD, TFT-LCD). [0003] figure 1 It is a schematic diagram of an existing TFT-LCD panel. The panel includes 4 scanning lines (SL1-SL4) 102, 3 data lines 104, 12 pixels 106, a gate driving circuit 108, a signal driving circuit 110, and three switches (SW1R, SW1G, SW1B) 112 . A switch control circuit 114 and a common capacitor 116 . Each pixel 106 includes a transistor 118 and a capacitor 120 for storing charge. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G02F1/133
Inventor 林崑宗张贵凯王博文
Owner SUNPLUS TECH CO LTD