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Driver integrated circuit for reducing coupling voltage and liquid crystal display device applying the same

A liquid crystal display and integrated circuit technology, applied in the field of liquid crystal display, can solve the problems of high cost, different coupling voltages, etc.

Inactive Publication Date: 2009-08-12
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the capacitances Cgd, Clc, and Cs mentioned above are different for each panel due to process variations, resulting in different coupling voltages for each panel.
As a result, it is necessary to adjust its common voltage for each panel, which will make the process more difficult and more expensive

Method used

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  • Driver integrated circuit for reducing coupling voltage and liquid crystal display device applying the same
  • Driver integrated circuit for reducing coupling voltage and liquid crystal display device applying the same
  • Driver integrated circuit for reducing coupling voltage and liquid crystal display device applying the same

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Embodiment Construction

[0046] image 3 It shows a driving method of a liquid crystal display provided by the present invention, in which only the equivalent circuit of one pixel is shown for easy understanding.

[0047] refer to image 3, a pixel 30 includes a gate line 31 for applying a gate voltage Vg', a data line 32 intersecting with the gate line 31 for applying a data voltage Vd, and a thin film transistor (TFT) , which are arranged in an array at the intersection of the gate line 31 and the data line 32 . To drive the pixel 30, the gate voltage Vg' is applied to the gate line 32, and the data voltage Vd is applied to the data line 32. The gate voltage Vg' includes a high state Vgh', which is applied to the gate line 31 to activate the TFT 33, and a low state Vgl, which is not applied to the gate line 31 to not activate the TFT 33. When the gate voltage Vg of the high state Vg' activates the TFT 33, the data voltage Vd passes through the TFT 33 and is transformed into a pixel voltage Vp'. ...

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Abstract

A driver integrated circuit (IC) for driving a panel having pixels controlled by gate lines and data lines is disclosed, including a power circuit for generating a high level voltage and a low level voltage, a timing controller, a source driving circuit controlled by the timing controller to drive the data lines, a gate driving circuit controlled by the timing controller to selectively enable one of the gate lines for a line period. The gate driving circuit first asserts the selected gate line with the high level voltage in order to activate the corresponding pixels for receiving the driving signals from the corresponding data lines, and the gate driving circuit subsequently asserts the selected gate line with the low level voltage such that the corresponding pixels are still activated for receiving the driving signals. An LCD device utilizing the driver IC is also provided.

Description

technical field [0001] The present invention relates to a liquid crystal display (Liquid Crystal Display; LCD), in particular to a driver integrated circuit (Driver Integrated Circuit; DriverIC), used to drive a liquid crystal display and reduce its coupling voltage, and to a liquid crystal display using the driver integrated circuit display device. Background technique [0002] Liquid crystal displays are widely used in various electronic devices as thin, light and compact flat panel displays. Among them, an active matrix liquid crystal display device using a thin film transistor (Thin Film Transistor; TFT) as a switching element is being used today because it has excellent image characteristics. [0003] A liquid crystal display includes a plurality of pixels arranged in a matrix, a plurality of data lines, and a plurality of gate lines. Each pixel includes a switching element such as a TFT and a liquid crystal layer. Each switching element is connected to one of the da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G2320/0209G09G3/3677
Inventor 吴炳升陈建宾
Owner HIMAX TECH LTD
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