Patent ID: 9633620
Date: 2017-04-25
CPC Classifications: G09G,G11C

Claim:
1. A GOA circuit comprising a plurality of cascade connected GOA units, wherein an nth-stage GOA unit of the plurality of cascade connected GOA units is configured for charging an nth horizontal scan line in a display area, the nth-stage GOA unit comprises a pull-up control circuit, a pull-up circuit, a transfer circuit, a first pull-down control circuit, a first pull-down circuit, a second pull-down control circuit, a second pull-down circuit and a main pull-down circuit, where n is a positive integer; the pull-up control circuit is configured for receiving an (n−2)th-stage stage-transfer signal outputted by an (n−2)th-stage GOA unit, and outputting a pull-up control signal according to the (n−2)th-stage stage-transfer signal; the pull-up circuit is configured for receiving a DC high voltage signal and the pull-up control signal, and outputting a scan drive signal according to the DC high voltage signal and the pull-up control signal; the transfer circuit is configured for receiving a clock signal and the pull-up control signal, and outputting an nth-stage stage-transfer signal according to the clock signal and the pull-up control signal; the first pull-down control circuit is configured for receiving a first low-frequency signal and an (n+2)th-stage stage-transfer signal generated from an (n+2)th-stage GOA unit, and outputting a first pull-down control signal according to the first low-frequency signal and the (n+2)th-stage stage-transfer signal; the first pull-down circuit is configured for receiving the first pull-down control signal and a DC low voltage signal, and pulling down the pull-up control signal according to the first pull-down control signal and the DC low voltage signal to thereby pull down the scan drive signal and the nth-stage stage-transfer signal; the second pull-down control circuit is configured for receiving a second low-frequency signal and the (n+2)th-stage stage-transfer signal, and outputting a second pull-down control signal according to the second low-frequency signal and the (n+2)th-stage stage-transfer signal; the second pull-down circuit is configured for receiving the second pull-down control signal and the DC low voltage signal, and pulling down the pull-up control signal according to the second pull-down control signal and the DC low voltage signal to thereby pull down the scan drive signal and the nth-stage stage-transfer signal; the main pull-down circuit is configured for receiving the DC low voltage signal and the (n+2)th-stage stage-transfer signal, and pulling down the pull-up control signal and the scan drive signal according to the DC low voltage signal and the (n+2)th-stage stage-transfer signal.