Shift register and driving method therefor, and display device
AssigneesBoe Technology Group Co., Ltd., Beijing Boe Display Technology Co., Ltd.
InventorsGuangxing WANG, Bin ZHANG, Dianzheng DONG, Qiang ZHANG, Pengming CHEN, Kan ZHANG, Yu XIE, Zheng WANG
Life of this patent
Estimating the term…
Abstract
A shift register and driving method therefore, and a display device are provided. The shift register includes: an input circuit; an output circuit; a reset circuit; a pull-down circuit; a pull-down control circuit; and a first noise reduction circuit. The first noise reduction circuit is coupled to a second input terminal of the shift register, a first input terminal, an output terminal and a first supply voltage terminal. The shift register can effectively reduce noise at the output terminal.
Claims18
A shift register, comprising:
- an input circuit, a first terminal of the input circuit being coupled to a first input terminal of the shift register and configured to receive a first input signal from the first input terminal, a second terminal of the input circuit being coupled to a pull-up node, and a third terminal of the input circuit being coupled to a first clock signal terminal;
- an output circuit, a first terminal of the output circuit being coupled to a second clock signal terminal, a second terminal of the output circuit being coupled to the pull-up node, and a third terminal of the output circuit being coupled to an output terminal of the shift register;
- a pull-down circuit, a first terminal of the pull-down circuit being coupled to a pull-down node, a second terminal of the pull-down circuit being coupled to the output terminal of the shift register, a third terminal of the pull-down circuit being coupled to the pull-up node, and a fourth terminal of the pull-down circuit being coupled to a first supply voltage terminal;
- a pull-down control circuit, a first terminal of the pull-down control circuit being coupled to the first clock signal terminal, a second terminal of the pull-down control circuit being coupled to the second clock signal terminal, a third terminal of the pull-down control circuit being coupled to the pull-down node, a fourth terminal of the pull-down control circuit being coupled to the first supply voltage terminal, and a fifth terminal of the pull-down control circuit being coupled to the pull-up node;
- and
- a first noise reduction circuit, a first terminal of the first noise reduction circuit being coupled to a second input terminal of the shift register and configured to receive a second input signal from the second input terminal, a second terminal of the first noise reduction circuit being coupled to the first input terminal of the shift register and configured to receive the first input signal from the first input terminal, a third terminal of the first noise reduction circuit being coupled to the output terminal of the shift register, a fourth terminal of the first noise reduction circuit being coupled to the first supply voltage terminal, and the first noise reduction circuit being configured to continuously reduce noise at the output terminal of the shift register when there is no input signal from the first input terminal and the second input terminal.
(canceled)
A driving method for a shift register, the shift register comprising an input circuit, an output circuit, a reset circuit, a pull-down circuit, a pull-down control circuit, and a first noise reduction circuit, the method comprising:
- transmitting a received input signal to a pull-up node by the input circuit;
- outputting a second clock signal of a second clock signal terminal to an output terminal of the shift register by the output circuit;
- resetting a pull-up signal of the pull-up node to a supply voltage of a first supply voltage terminal and resetting an output signal of the output terminal of the shift register to the supply voltage of the first supply voltage terminal by the reset circuit;
- controlling the pull-down circuit to operate or not by the pull-down control circuit;
- pulling down both the output signal of the output terminal of the shift register and the pull-up signal of the pull-up node to the supply voltage of the first supply voltage terminal by the pull-down circuit;
- and
- during no input signal to the first noise reduction circuit continuously reducing noise at the output terminal of the shift register by the first noise reduction circuit.
Dependencies are inferred from the claim text.