US 8,912,996 B2 · Scan driver and driving method thereof

Abstract

A scan driver including sequentially arranged scan driving blocks, each of the blocks including a first node receiving a signal input into a driving signal input terminal based on a clock signal input into a second-clock-signal input terminal, a second node receiving a clock signal input into a first-clock-signal input terminal, a first transistor including a gate electrode connected to the second node, one electrode receiving an output control signal, and another electrode connected to an output terminal, a second transistor including a gate electrode connected to the first node, one electrode connected to a third-clock-signal input terminal, and another electrode connected to the output terminal, and a third transistor including a gate electrode connected to the third-clock-signal input terminal and one electrode connected to the first node and configured to transfer a voltage of the output terminal to the first node.

Claims30

Dependent claims

A scan driver, comprising:

a plurality of scan driving blocks arranged sequentially, each of the plurality of scan driving blocks including:
a first node configured to receive a signal input into a driving signal input terminal in accordance with a clock signal input into a second clock signal input terminal;
a second node configured to receive a clock signal input into a first clock signal input terminal;
a first transistor including a gate electrode connected to the second node, a first electrode configured to receive an output control signal, and a second electrode connected to an output terminal;
a second transistor including a gate electrode connected to the first node, a first electrode connected to a third clock signal input terminal, and a second electrode connected to the output terminal;
and
a third transistor including a gate electrode connected to the third clock signal input terminal, a first electrode connected to the first node, and a second electrode connected the output terminal, wherein the output control signal varies between at least two voltage levels.

4 more elements

A driving method of a scan driver including a plurality of scan driving blocks including a first node, a second node, a first transistor including a gate electrode connected to the second node and configured to transfer an output control signal to an output terminal, a second transistor including a gate electrode connected to the first node and configured to transfer a first clock signal to the output terminal, a third transistor including a gate electrode to which the first clock signal is applied and a first electrode connected to the first node and configured to transfer a voltage of the output terminal to the first node, and a capacitor connected to the first node and the output terminal, the method comprising:

varying a voltage of the second node by an output control signal at a gate-on voltage;
and
turning on the first transistor by varying the voltage of the second node and outputting the output control signal of the gate-on voltage to the output terminal as a scan signal, wherein the output control signal varies between at least two voltage levels.

Dependencies are inferred from the claim text.

Scan driver and driving method thereof

Life of this patent

Scan driver and driving method thereof

Life of this patent

Abstract

Claims30