Public voltage regulation circuit, method, display panel and device
A common voltage and regulation circuit technology, applied in static indicators, instruments, etc., can solve the problem of horizontal stripes on the clock signal line, and achieve the effect of improving the common voltage fluctuation phenomenon, improving the horizontal stripes, and eliminating the coupling effect.
Active Publication Date: 2019-02-19
BOE TECH GRP CO LTD +1
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Problems solved by technology
[0003] The main purpose of the present invention is to provide a public voltage regulation circuit, method, display panel and device to solve the problem in the prior art that the coupling effect of the clock signal line to the public voltage line produces horizontal stripes
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[0053] 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 some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0054] Such as figure 1 The common voltage regulation circuit shown includes: a negative feedback operational amplifier OP-VCOM, a first resistor R1, a second resistor R2, a third resistor R3 and a first capacitor C1;
[0055] The positive phase input terminal VCOM-IN_P of the negative feedback operational amplifier OP-VCOM is connected to the reference common voltage output terminal VCOM-OUT through the third resistor R3; the reference common voltage output t...
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The present invention provides a public voltage adjustment circuit, method, display panel and device. The common voltage adjustment circuit includes: a filtering unit; and a control unit configured to control disconnection of the connection between the common voltage feedback line and the second input end of the common voltage negative feedback amplification unit during the compensation phase, and to control the reference common voltage The output terminal is connected to the second input terminal through the filter unit, and during the non-compensation stage, the connection between the common voltage feedback line and the second input terminal is controlled to be turned on, and the reference common voltage output terminal is controlled to be disconnected from the second input terminal. The connection between the two input terminals; the starting moment of the compensation phase is the moment when the clock signal output by the clock signal line whose distance from the common voltage feedback line is within a predetermined distance range is at the rising edge and / or falling edge, And the compensation phase maintains a preset duration. The present invention can solve the problem in the prior art that the coupling effect of the clock signal line on the common voltage line causes horizontal stripes.
Description
technical field [0001] The present invention relates to the technical field of public voltage regulation, in particular to a public voltage regulation circuit, method, display panel and device. Background technique [0002] At present, in order to achieve low cost and narrow borders, most display panels have adopted GOA (Gate driver OnArray, array substrate row drive technology. However, the common voltage wiring on the display panel using this technology (the common voltage wiring includes common The distance between the voltage feedback line and the common voltage compensation line) and the clock signal line is very close, the common voltage on the common voltage line will be greatly affected by the coupling of the clock signal, and the clock signal output by the clock signal line is used as the GOA The amplitude of the control input voltage of the unit is very high (up to 30V), which causes the Ripple (fluctuation) of the common voltage to be very large, thereby generatin...
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IPC IPC(8): G09G3/20
CPCG09G3/20G09G2230/00G09G3/3677G09G2330/12G09G3/3655G09G3/3696G09G2310/0291G09G2320/0204G09G2320/0233G09G2320/0247G09G2330/021
Inventor 陈帅张智肖利军张元波
Owner BOE TECH GRP CO LTD