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US 11,694,626 B2Granted
Scan driver and driving method thereof
AssigneeSamsung Display Co., Ltd.
InventorsHai Jung In, Soon Gi Kwon
Life of this patent
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Abstract
A scan driver and a driving method thereof, in which the scan driver includes a plurality of stages outputting an output signal in response to clock signals supplied at a first frequency during a driving time of one frame, wherein the plurality of stages are supplied with the clock signals at a second frequency lower than the first frequency during a hold time of the one frame that is separate from the driving time of the one frame.
Claims18
A scan driver comprising:
- a plurality of stages configured to output an output signal in response to clock signals supplied at a first frequency during a driving time of one frame,
- wherein the plurality of stages are supplied with the clock signals at a second frequency lower than the first frequency during a hold time of the one frame that is separate from the driving time of the one frame;
- and
- the clock signals include a first clock signal and a second clock signal,
- wherein each of the plurality of stages includes:
- an input portion controlling a voltage of a first node and a voltage of a second node based on signals supplied to a first input terminal and a second input terminal;
- a first signal processing portion that supplies a voltage of a second power source to a fourth node based on the voltage of the first node, or electrically connects the second node and the fourth node through a fifth node based on a voltage of a first power source;
- a second signal processing portion that includes a first transistor connected between a third node and a sixth node, and is connected to the first input terminal, the second input terminal, and the first power source to control a voltage of the third node based on an operation of the first transistor;
- and
- an output portion that controls a voltage applied to the third node to be less than or equal to the voltage of the first power source, and supplies the voltage of the first power source or the voltage of the second power source to an output terminal as a scan signal based on the voltage of the third node and a voltage of the fourth node.
7 more elements
A driving method of a scan driver that includes a plurality of stages, comprising:
- outputting, by the plurality of stages, a plurality of output signals in response to clock signals supplied at a first frequency during a driving time of one frame;
- and
- receiving, by the plurality of stages, the clock signals at a second frequency lower than the first frequency during a hold time of the one frame that is separate from the driving time of the one frame,
- wherein each of the plurality of stages includes:
- an input portion controlling a voltage of a first node and a voltage of a second node based on signals supplied to a first input terminal and a second input terminal;
- a first signal processing portion that supplies a voltage of a second power source to a fourth node based on the voltage of the first node, or electrically connects the second node and the fourth node through a fifth node based on a voltage of a first power source;
- a second signal processing portion that includes a first transistor connected between a third node and a sixth node, and is connected to the first input terminal, the second input terminal, and the first power source to control a voltage of the third node based on an operation of the first transistor;
- and
- an output portion that controls a voltage applied to the third node to be less than or equal to the voltage of the first power source, and supplies the voltage of the first power source or the voltage of the second power source to an output terminal as a scan signal based on the voltage of the third node and a voltage of the fourth node.
6 more elements
Dependencies are inferred from the claim text.