Invention Grant
- Patent Title: Gate driving circuit
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Application No.: US15840927Application Date: 2017-12-13
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Publication No.: US10198987B2Publication Date: 2019-02-05
- Inventor: WooSung Shim , JunHo Bong
- Applicant: LG DISPLAY CO., LTD.
- Applicant Address: KR Seoul
- Assignee: LG Display Co., Ltd.
- Current Assignee: LG Display Co., Ltd.
- Current Assignee Address: KR Seoul
- Agency: Seed Intellectual Property Law Group LLP
- Priority: KR10-2016-0173660 20161219
- Main IPC: G09G3/20
- IPC: G09G3/20 ; G11C19/28 ; G11C19/18 ; H03K17/56

Abstract:
The gate driving circuit includes a shift register including a plurality of stages. An n-th stage among the plurality of stages includes: a pull-up switching element outputting a first clock to an output node in accordance with a voltage in a Q node, a pull-down switching element outputting a gate low voltage VGL to the output node in accordance with a voltage in a QB node, and a logic unit inverting and outputting a voltage in the Q node and a voltage in the QB node. The logic unit includes a first switching element including a gate to which a fourth clock is input and being between a start voltage line which supplies a start voltage and the Q node, a second switching element including a gate connected to the Q node and being connected to the QB node, a third switching element being between the second switching element and a gate low voltage line which supplies the gate low voltage, a fourth switching element including a gate to which a third clock is input and being between a gate high voltage line which supplies a gate high voltage and the QB node, a fifth switching element including a gate connected to the QB node and being between the Q node and the gate low voltage line, a first capacitor between the Q node and the output node, and a second capacitor between the gate low voltage line and the gate of the pull-down switching element.
Public/Granted literature
- US20180174503A1 GATE DRIVING CIRCUIT Public/Granted day:2018-06-21
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