Liquid crystal display apparatus and a driving method thereof

A liquid crystal display, driver technology, applied in liquid crystal display, LCD. It can solve the problems of deterioration of display quality, brightness difference, charge difference, etc.

Inactive Publication Date: 2005-06-15
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the charging voltages are not equal for the pixels in the first and third rows because the scheduled transition time for the voltage of the pixels in the first row to reach the target level is consumed because of the polarity reversal
Differences in charging voltage lead to differences in brightness, thereby deteriorating display quality
The charge difference is caused by a fundamental change in the voltage applied to the pixel due to polarity reversal, signal line impedance, and loading characteristics of the LC panel

Method used

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  • Liquid crystal display apparatus and a driving method thereof
  • Liquid crystal display apparatus and a driving method thereof
  • Liquid crystal display apparatus and a driving method thereof

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Embodiment Construction

[0028] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. However, the present invention can be embodied in many different forms and should not be limited to the embodiments set forth herein.

[0029] Now, an LCD and a driving method thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0030] Fig. 2 shows the waveforms of the charging voltage in 4 consecutive rows of pixels in an LC panel for the purpose of explaining the principle of the present invention.

[0031] As shown in Figure 2, the polarity is reversed at the pixels of the first and third rows. A voltage with an additional charge level is applied to the polarity-reversed pixels shown in hatched parts (a) and (b). The additional charge level refers to a predetermined compensation voltage level formed by adding a predetermined volta...

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Abstract

The invention relates to a liquid crystal display with phase inversion of two or more lines. The timing controller of this liquid crystal display controls the image data to be reversed in polarity every two or more lines, and the image data of the polarity-reversed pixel is combined with the compensation data for additionally charging the pixel to a predetermined level, and output The combined data. To this end, the timing controller includes vector tables for storing the number of frames and lines to be compensated at the clock signal frequency, frame frequency, and line frequency. In order to apply a voltage to additionally charge the polarity-reversed pixels, the compensation data stored in the vector table is combined with image data from an external graphics source, and the liquid crystal panel is driven using the combined data. The compensation data is predetermined in consideration of brightness differences at different positions on the display panel and frame charge level compensation for frames.

Description

technical field [0001] The present invention relates to a liquid crystal display, in particular, to a liquid crystal display having phase inversion of two or more lines, which reverses the polarity of the applied voltage every two or more lines to prevent LC deterioration. The present invention relates to an LCD for improving the image quality uniformity of pixels in a row whose polarity is reversed. Background technique [0002] In recent years, displays for personal computers or TVs have been required to be light and compact, and flat panel displays such as liquid crystal displays (LCDs) have been developed and put into practical use instead of cathode ray tubes to meet such requirements. [0003] The LCD includes a panel with a matrix pattern of pixels and another panel facing it. A liquid crystal (LC) having dielectric anisotropy is inserted between these two panels. An electric field is generated between these two panels. The transmittance of light passing through t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/20G09G3/36
CPCG09G3/3614G09G3/3648G09G2310/06G09G2320/0223G09G2320/0233G02F1/133
Inventor 罗广贤
Owner SAMSUNG DISPLAY CO LTD
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