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Liquid crystal display device and its driving method

A technology of a liquid crystal display and a driving method, applied in the field of liquid crystal displays and their driving, can solve the problems of picture distortion, pixel unit charging completion, waveform distortion, etc., and achieve the effect of avoiding data confusion

Inactive Publication Date: 2007-11-14
INNOLUX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the capacitive effect between the scan line and the pixel, and the resistive effect of the data line, when the data signal Data passes through more scan lines, it is easier to deform, resulting in waveform distortion
Figure 2B shows the situation of the data signal Data on the nth scanning line. It can be clearly seen from Figure 2B that the data signal Data has been seriously distorted
When the distortion of the data signal Data is too serious, the corresponding pixel unit cannot be charged correctly, which leads to distortion of the picture and reduces the picture quality of the liquid crystal display.

Method used

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  • Liquid crystal display device and its driving method
  • Liquid crystal display device and its driving method
  • Liquid crystal display device and its driving method

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Embodiment 1

[0037] Please continue to refer to FIG. 3A . In order for those familiar with this technology to understand the spirit of the present invention, in the following embodiments, it is assumed that the specification of the liquid crystal display 300 is the 17 o'clock SXGA specification of the Video Electronics Standards Association (VESA) standard, but it does not The present invention is not limited thereto. According to the specification of SXGA at 17:00, the liquid crystal display 300 may have 1024 scan lines. The time spent by the gate driving circuit 323 in scanning the 1024 scan lines is referred to as the actual scan time hereinafter. After the gate drive circuit 323 scans the 1024 scan lines, the timing control circuit 325 controls the source drive circuit 321 and the gate drive circuit 323 to idle for a period of time, which is hereinafter referred to as blank scan time. The length of the blank scan time may be equivalent to the time it takes for the gate drive circuit ...

Embodiment 2

[0043] In Embodiment 2, the timing control circuit 325 controls the scan signal compensation circuit 327 to adjust the time length of the scan signal within the original actual scan time. Since the overall actual scan time remains unchanged, when the pixel units on the scan line closer to the source driving circuit 321 are enabled, the scan signal in this embodiment is shorter than the conventional scan signal. For example, when the pixel unit on the first scan line (SL0) is enabled, the scan signal can be adjusted to 14 microseconds, and when the pixel unit on the second scan line (SL1) is enabled, the scan signal can be increased is 14.2 microseconds, when the pixel unit on the third scanning line (SL2) is enabled, the scanning signal can be increased to 14.2 microseconds, and so on.

[0044] Similarly, the timing control circuit 325 controls the data signal compensation circuit 329 to adjust the time length of the data signal according to the adjusted time length of the sca...

Embodiment 3

[0047] In this embodiment, the methods of Embodiment 1 and 2 are combined. Specifically, the blank scan time is used to extend the actual scan time, and the timing control circuit 325 also controls the scan signal compensation circuit 327 to change the time length of the scan signal according to the position of the enabled pixel unit. In addition, the timing control circuit 325 also controls the data signal compensation circuit 329 to adjust the time length of the data signal according to the adjusted time length of the scan signal.

[0048] The advantage of this embodiment is that the time length of the data signal used to drive the pixel unit on the scan line (such as SL1024) far away from the source driver circuit can be increased considerably, so the data signal can have enough time to configure The pixel units on it are charged, so that the liquid crystal display 300 in this embodiment has better picture quality.

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Abstract

The invention discloses a LCD and its driving method, able to make the LCD output an image, where the image is composed of a pixel array and the time for enabling these pixels includes an actual scanning time and a blanking scanning time. And the driving method comprises: firstly, enabling each scan signal to enable the respective row of pixels; successively, generating a data signal to drive each enabled pixel separately, and according to the positions of the enabled pixels, regulating the time lengths of the scan and data signals.

Description

technical field [0001] The present invention relates to a liquid crystal display and its driving method, and in particular to a liquid crystal display and its driving method which improves the display picture quality of the liquid crystal display by adjusting the time length of a scanning signal or a data signal. Background technique [0002] In order to match the modern life style, the volume of video or image devices tends to be thinner and thinner day by day. Although the traditional cathode ray display (CRT) still has its advantages, due to the structure of the internal electronic cavity, the display is bulky and takes up space, and there are still problems such as radiation damage to the eyes when displaying. Therefore, flat panel displays (Flat Panel Displays), such as liquid crystal displays (LCDs), organic light-emitting displays (OLEDs), or plasma displays (Plasma Display Panels, PDPs), developed in conjunction with optoelectronic technology and semiconductor manufa...

Claims

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Application Information

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IPC IPC(8): G09G3/36G09G3/20G02F1/133
Inventor 原伸二蔡永裕辜宗尧
Owner INNOLUX CORP
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