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Gamma voltage generation method and circuit, source drive circuit, drive chip and display device

A gamma voltage and circuit generation technology, applied in cathode ray tube indicators, static indicators, instruments, etc., can solve problems affecting the performance of display panels, and achieve better performance and flexible adjustment.

Active Publication Date: 2019-10-25
CHIPONE TECH BEIJINGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Some of the reference voltage resistors of existing display panel driver ICs require the same change in the overall resistance value, which affects the performance of the display panel.

Method used

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  • Gamma voltage generation method and circuit, source drive circuit, drive chip and display device
  • Gamma voltage generation method and circuit, source drive circuit, drive chip and display device
  • Gamma voltage generation method and circuit, source drive circuit, drive chip and display device

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Embodiment Construction

[0032] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

[0034] Hereinafter, the present invention will be described in detail with reference t...

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PUM

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Abstract

The invention discloses a gamma voltage generation method, which comprises the following steps of: providing a plurality of reference voltages, and receiving the corresponding reference voltage by a connecting node of every two adjacent resistor units; providing, by the resistance unit, at least one stage of gamma voltage according to the received reference voltage and the corresponding proportionality coefficient; and setting a proportionality coefficient of each resistor unit so as to adjust each stage of gamma voltage. The invention further discloses a gamma voltage generation circuit, a source driving circuit, a driving chip and a display device. The reference voltage resistance defined by a user can be adjusted more flexibly, and the performance of the display panel is better. And meanwhile, other key elements such as the chip area, the power consumption and the transition speed can be better designed and combined.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a gamma voltage generating method, a generating circuit, a source driving circuit, a driving chip and a display device. Background technique [0002] Existing display panels such as liquid crystal display panels include a plurality of pixel units arranged in an array, any pixel unit includes three sub-pixels of red, green, and blue, and the pixel electrodes in each sub-pixel are connected to a gamma (Gamma )Voltage. The gamma voltage is used to control the display grayscale (that is, the brightness) of the sub-pixels. The voltage difference between different gamma voltages and the common electrode voltage causes the liquid crystal molecules to rotate to different degrees, thereby resulting in differences in light transmittance, realizing the Gray scale display. [0003] The method for determining the gamma voltage is: fitting the required gamma curve (that is, the idea...

Claims

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Application Information

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IPC IPC(8): G09G5/10
CPCG09G5/10G09G2320/0673
Inventor 林立堂林家弘
Owner CHIPONE TECH BEIJINGCO LTD