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Source driving circuit and display device

A source drive and circuit technology, applied to static indicators, instruments, etc., can solve the problems of slow gamma voltage response speed, etc., to achieve the effects of ensuring stability, reducing delay time, and improving output conversion rate

Active Publication Date: 2022-03-18
FITIPOWER INTEGRATED TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, it is necessary to provide a source driving circuit and a display device, aiming at solving the problem of slow response speed of gamma voltage in the prior art

Method used

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  • Source driving circuit and display device
  • Source driving circuit and display device

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Embodiment Construction

[0075] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0076] The terms "first", "second" and "third" in the description of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the term "comprise", as well as any variations thereof, is intended to cover a non-exclusive inclusion. For example, a pr...

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Abstract

The invention discloses a source electrode driving circuit and a display device. The source electrode driving circuit comprises a gamma resistor string, a digital-to-analog conversion circuit and an output cache circuit. The digital-to-analog conversion circuit obtains gamma voltage from the gamma resistor string according to the data signal. The output cache circuit outputs a driving voltage according to the gamma voltage and provides the driving voltage to the data line. The output cache circuit comprises an input stage module, a gain stage module and an output stage module. In the switching stage, the auxiliary input stage unit of the input stage module, the gain stage module and the output stage module form a first unity gain amplifier so as to output the driving voltage according to the received gamma voltage. In the stable stage, the main input stage unit of the input stage module, the gain stage module and the output stage module form a second unity gain amplifier so as to output the driving voltage according to the received gamma voltage.

Description

technical field [0001] The invention relates to a source driving circuit and a display device. Background technique [0002] With the continuous development of electronic technology, most consumer electronic products such as mobile phones, portable computers, personal digital assistants (PDAs), tablet computers, and media players use displays as input and output devices to make the products more friendly. Way. Generally, a display includes a display panel and a driving circuit for driving the display panel to display images. The display panel includes a plurality of pixel units. The drive circuit includes a timing control circuit, a gamma correction reference voltage circuit, a gate drive circuit and a source drive circuit. The source driving circuit includes a gamma resistor string, a digital-to-analog converter (Digital to Analog, DAC) and an output buffer circuit. The DAC converts the received image data into an analog signal based on the gamma voltage provided by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20
CPCG09G3/20G09G2320/0673G09G2300/0828G09G2310/027G09G2310/0291G09G2310/08G09G2320/0276G09G2320/0223G09G2310/0248Y02D10/00
Inventor 刘立伟黄柏文卓均勇
Owner FITIPOWER INTEGRATED TECH INC