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Liquid crystal display (LCD) device and driving method

A driving method and technology of liquid crystal display, applied in static indicators, instruments, etc., can solve problems such as noise

Inactive Publication Date: 2011-11-09
HIMAX TECH LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, when using this known column inversion driving method, the glass on the panel will resonate due to the polarity conversion of the data line voltage and the common voltage, which will cause noise

Method used

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  • Liquid crystal display (LCD) device and driving method
  • Liquid crystal display (LCD) device and driving method
  • Liquid crystal display (LCD) device and driving method

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Embodiment Construction

[0026] In view of the problem of noise caused by the fixed driving frequency during traditional column inversion driving, the present invention controls the driving time length of the common voltage and the data line voltage through frequency modulation at the driving time control end.

[0027] image 3 It is a waveform diagram of common voltage and data line voltage when using column inversion driving according to an embodiment of the present invention. In the embodiment of the present invention, the common voltage, the data line voltage, and the scanning line voltage are frequency modulated so that the output frequency varies between f1~fn, and according to the driving time ta (frequency fa=1 / ta; a=1~n) Differently, it can be divided into a plurality of periods T1 to Tn. During T1, the data line voltage and the common voltage are modulated according to the first frequency f1 to drive the pixel array, wherein the data line voltage and the common voltage drive each column of ...

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Abstract

The invention provides a driving method of a liquid crystal display (LCD). The LCD is provided with a pixel array. The driving method comprises the following steps of: modulating a first data wire voltage and a first common voltage according to a first frequency in a first period to drive the pixel array; and modulating a second data wire voltage and a second common voltage according to a second frequency in a second period to drive the pixel array. Therefore, the problem of noise generated by frequency resonance of a glass substrate and a driving voltage is improved.

Description

technical field [0001] The present invention relates to a driving method of a liquid crystal display, and particularly relates to a driving method of column inversion. Background technique [0002] The equivalent circuit of a pixel in a conventional liquid crystal display is as figure 1 As shown, the pixel 100 includes a scan line 101 , a data line 102 , a transistor 103 , a liquid crystal layer equivalent capacitor 104 , and a holding capacitor 105 . The other end of the liquid crystal layer equivalent capacitor 104 and the holding capacitor 105 is connected to a common electrode on the opposite substrate, and the shared electrode has a common voltage Vcom. When the scan line 101 provides a gate signal to turn on the transistor 103 , the data line 102 will apply the data line voltage to the liquid crystal equivalent capacitor 104 and the holding capacitor 105 due to the conduction of the transistor 103 . The liquid crystal in the liquid crystal layer will be driven to a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 陈志豪张富科江政隆
Owner HIMAX TECH LTD
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