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A kind of nmos type goa circuit and display panel

A liquid crystal display panel and circuit technology, applied to static indicators, digital memory information, instruments, etc., can solve problems such as poor flicker uniformity, achieve consistent feed-through voltage, good flicker uniformity, and ensure delay conditions

Active Publication Date: 2019-10-11
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feedthrough voltage of the upper and lower parts of the NMOS display panel is inconsistent, which eventually leads to poor flicker uniformity of the upper and lower parts of the NMOS display panel

Method used

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  • A kind of nmos type goa circuit and display panel
  • A kind of nmos type goa circuit and display panel
  • A kind of nmos type goa circuit and display panel

Examples

Experimental program
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Effect test

Embodiment Construction

[0049] The present invention provides a kind of NMOS type GOA circuit, is used in liquid crystal display panel, such as Figure 4 As shown, in the first embodiment, the NMOS type GOA circuit includes M cascaded GOA units, and the Nth stage GOA unit includes: forward and reverse scanning control circuit 200, node signal control circuit 300, node signal output circuit 400 , pull-down circuit 500, and output circuit 100.

[0050] The forward and reverse scan control circuit 200 is used to control the GOA circuit to perform forward scan or reverse scan according to the forward scan control signal U2D or the reverse scan control signal D2U.

[0051] The output circuit 100 includes a first TFT NT1 and a second TFT NT2, the node signal output circuit 400 includes a third TFT NT3, and the pull-down circuit 500 includes a fourth TFT NT4.

[0052] The first end of the second thin film transistor NT2 is connected to the high potential signal VGH, the second end of the second thin film t...

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PUM

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Abstract

The present invention provides an NMOS type GOA circuit and a display panel, the circuit includes M cascaded GOA units, the output circuit of the Nth stage GOA unit includes a first thin film transistor and a second thin film transistor, and the node signal output circuit includes a third The thin film transistor, the pull-down circuit includes a fourth thin film transistor; the first end of the second thin film transistor is connected to a high potential signal or is connected to the third end of the first thin film transistor, and the second end of the second thin film transistor is connected to the first end of the first thin film transistor. The first end is connected, the third end of the second thin film transistor is connected to the Nth clock signal; the third end of the first thin film transistor is connected to the output end of the forward and reverse scanning control circuit and connected to the low voltage through the first stabilizing capacitor Potential signal, and the second terminal of the first thin film transistor is connected with the first terminal of the fourth thin film transistor and serves as the output terminal of the Nth stage gate driving signal. The invention can ensure that the feed-through voltage of the AA area of ​​the display panel is consistent, and ensure that the display panel has good flicker uniformity.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an NMOS type GOA circuit and a display panel. Background technique [0002] The GOA (Gate Driver on Array, array substrate row driving technology) circuit is a circuit that realizes the progressive scanning of the display panel. Now the commonly used driving circuits in the display panel include CMOS-type GOA circuits and NMOS-type GOA circuits. The CMOS-type GOA circuits include NTFT (N-channel thin film transistor) devices and PTFT (P-channel thin film transistor) devices; and only NTFT devices are included in the NMOS type GOA circuit. Now the GOA control signal line in the NMOS display panel is directly connected to the first-level GOA unit through the WOA wiring, and the GOA control signal line needs to pass through a large RC circuit (Resistance-Capacitance Circuits, that is, a phase shift circuit, or RC filter. , RC network) to access the last level of GOA unit. In this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3674G11C19/28G09G3/20G09G2300/0408G09G2310/0267G09G2310/0286G09G2320/0247G09G3/3677G09G2310/0202G09G2310/0283G09G2320/0219G11C19/184G11C19/00
Inventor 洪光辉
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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