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Gamma chip, display panel driving circuit and display device

A gamma chip and gamma technology, applied in static indicators, instruments, etc., can solve the problem of high cost of gamma chips

Inactive Publication Date: 2019-04-23
HKC CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional gamma chips include memory, multiple digital-to-analog converters and operational amplifiers, and multiple operational amplifiers lead to high cost of gamma chips

Method used

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  • Gamma chip, display panel driving circuit and display device
  • Gamma chip, display panel driving circuit and display device
  • Gamma chip, display panel driving circuit and display device

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] It should be noted that the descriptions involving "first", "second" and so on in the present invention are only for the purpose of description, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the meaning of...

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Abstract

The invention discloses a gamma chip, a display panel driving circuit and a display device. The gamma chip comprises a memorizer, a signal generation circuit, N groups of digital-to-analog converters(DAC), N first switch circuits, N operational amplifiers, N second switch circuits, N first charging / discharging circuits and N second charging / discharging circuits; each group of DAC converts a received data gamma signal into an analog gamma signal, each first switch circuit receives two paths of analog gamma signals output by the memorizer, and correspondingly outputs one path of analog gamma signal according to a first control signal and a second control signal; the operational amplifiers are used for amplifying two paths of analog gamma signals, and outputting the amplified analog gamma signals to a source driving chip from the output ends corresponding to the second switch circuits; and meanwhile, N first charging / discharging circuits and N second charging / discharging circuits are arranged to perform charging / discharging according to the analog gamma signals.

Description

technical field [0001] The present invention relates to the technical field of display panels, in particular to a gamma chip, a display panel driving circuit and a display device. Background technique [0002] TFT-LCD (Thin Film Transistor Liquid Crystal Display, Thin Film Transistor Liquid Crystal Display) is one of the main varieties of flat panel display, and has become an important display platform in modern IT and video products. The main driving principle of TFT-LCD is that the main board of the system connects the R / G / B compression signal, control signal and power supply to the connector on the PCB board through wires, and the data is processed by the TCON (Timing Controller, timing controller) IC on the PCB board. Finally, it is connected to the display area through S-COF (Source-Chip on Film, source-level film drive chip) and G-COF (Gate-Chip on Film, gate film drive chip), so that the LCD can obtain the required power and Signal. [0003] Among them, in order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/36G09G2310/0264G09G2310/0291
Inventor 黄笑宇
Owner HKC CORP LTD
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