GOA CIRCUIT, AND LIQUID CRYSTAL DISPLAY

• Main Authors: CHEN, Shu-Jhih, SHI, Longqiang
• Format: Patent
• Language: English; French; German
• Published: 29.07.2020
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

A GOA circuit, and liquid crystal display. The GOA circuit comprises: a pull-up circuit (11) comprising a first switch transistor (T1) and a scan output end (G(N)) coupled to a second connection end of the first switch transistor (T1); and a pull-up control circuit (12) comprising a second switch transistor (T2), a third switch transistor (T3) comprising a first connection end coupled to a second connection end of the second switch transistor (T2) and a second connection end coupled to a control end of the first switch transistor (T1), and a fourth switch transistor (T4) comprising a control end coupled to the control end of the first switch transistor (T1), a first connection end coupled to the first connection end of the third transistor (T3), and a second connection end coupled to the scan output end (G(N)). The fourth switch transistor is used to control, when the scan output end (G(N)) outputs a first voltage level, the voltage level of a control end of the third switch transistor (T3) to be lower than the voltage level of the first connection end of the third switch transistor (T3). In this way, the present invention prevents a transistor from being incorrectly turned on or off because of a threshold drift, and accordingly prevents a circuit output error.