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Method and device for determining driving voltages

A technique for determining a driving voltage and a method for determining it, applied in the field of a method and device for determining a driving voltage, capable of solving problems such as afterimages in liquid crystal displays

Active Publication Date: 2013-09-11
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for determining a driving voltage, which are used to solve the problem of afterimages during liquid crystal display

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  • Method and device for determining driving voltages
  • Method and device for determining driving voltages

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Embodiment Construction

[0025] Embodiments of the present invention provide a method and device for determining a driving voltage. When setting the driving high voltage and driving low voltage of a TFT-LCD, for each gray scale, first determine a The average value of the driving high voltage and driving low voltage of the gray scale, and then according to the determined average value of the driving high voltage and driving low voltage of the gray scale, the relationship curve between the driving voltage of the source driver integrated circuit and the light transmittance of the TFT-LCD, and the TFT -LCD gamma curve, to set the TFT-LCD drive high voltage and drive low voltage, because the average value of the drive high voltage and drive low voltage is determined according to the TFT-LCD pixel electrode jump voltage, not because the pixel electrode jump voltage is different from The difference between the average value of the gray-scale driving high voltage and driving low voltage and the reference volta...

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Abstract

An embodiment of the invention provides a method and a device for determining driving voltages. The method includes determining an average value of a driving high voltage and a driving low voltage of each gray level according to a TFT-LCD (thin film transistor-liquid crystal display) pixel electrode jumping voltage of the gray level when a driving high voltage and a driving low voltage of a TFT-LCD are set; setting the driving high voltage and the driving low voltage of the TFT-LCD according to a relation curve of the average value of each gray level, a driving voltage of a source driving integrated circuit and the light transmittance of the TFT-LCD and a gamma curve of the TFT-LCD. The method and the device have the advantages that as an average value of the driving high voltage and the driving low voltage is determined according to the TFT-LCD pixel electrode jumping voltages, a phenomenon that driving voltages are asymmetrical due to the fact that a corresponding pixel electrode jumping voltage is different from the difference between an average value of a driving high voltage and a driving low voltage of each gray level and a reference voltage Vcom of an existing TFT-LCD is prevented, and the problem of residual images due to deviation of the pixel electrode jumping voltages of the existing TFT-LCD is solved.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a method and device for determining a driving voltage. Background technique [0002] Afterimage is considered to be one of the biggest problems in the production process engineering of Thin Film Transistor-Liquid Crystal Display (TFT-LCD), and afterimage is divided into DC / AC (Alternating Current, AC) afterimage. It is the afterimage caused by the asymmetry of the driving voltage of TFT-LCD that causes the metal and non-metal particles dissociated in the liquid crystal layer to tend to the electric field side, and the particles cannot return to the dissociated state under the condition of no voltage, resulting in different brightness. [0003] The driving voltage of each gray scale of TFT-LCD includes driving high voltage and driving low voltage. Generally, the driving voltage of TFT-LCD is based on figure 1 The relationship curve between the driving voltage of the source dri...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3696G09G2320/0204G09G2320/0257G09G2320/0276G09G2320/0673
Inventor 苏丹
Owner BOE TECH GRP CO LTD
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