Method and device for determining driving voltages

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

Active Publication Date: 2015-03-11
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] The embodiment of the present invention provides 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 level, first determine one according to the TFT-LCD pixel electrode jump voltage of the gray level. 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 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 the drive low voltage is determined according to the TFT-LCD pixel electrode jump voltage, it will not be different because the pixel electrode jump voltage The difference between the average value of the ...

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Abstract

A method for determining a driving voltage comprises: (S301) when a driving high voltage and a driving low voltage of a TFT-LCD are set, for each gray level, determining an average value of a driving high voltage and a driving low voltage of the gray level according to a TFT-LCD pixel electrode feed-through voltage of the gray level; and (S302) setting the driving high voltage and the driving low voltage of the TFT-LCD according to a relationship curve of the average value, a driving voltage of a source driving integrated circuit and a light transmittance of the TFT-LCD and a gamma curve of the TFT-LCD. Because an average value of a driving high voltage and a driving low voltage is determined according to a TFT-LCD pixel electrode feed-through voltage, a phenomenon is prevented that driving voltages are asymmetrical due to the fact that a pixel electrode feed-through voltage is different from a difference between the average value of the driving high voltage and the driving low voltage of the gray level and a reference voltage (Vcom) of a TFT-LCD, and the problem of an residual image due to deviation of the pixel electrode feed-through voltage of the TFT-LCD is avoided. Also provided is an apparatus for determining a driving voltage.

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] Afterimages are considered to be one of the biggest problems in the production process engineering of Thin Film Transistor-Liquid Crystal Display (TFT-LCD). The afterimages are divided into DC / Alternating Current (Alternating Current, AC) afterimages. DC afterimages are generally considered It is the asymmetry of the driving voltage of the TFT-LCD that causes the metal and non-metal particles that are free in the liquid crystal layer to move to the electric field side, and the particles cannot be restored to the free state under the condition of no voltage, resulting in afterimages caused by 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 relations...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/36G09G3/3696G09G2320/0204G09G2320/0257G09G2320/0276G09G2320/0673
Inventor 苏丹
Owner BOE TECH GRP CO LTD
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