Shift register, gate driving circuit containing the same, and method for driving the same

Patent metadata

Field	Value
Publication number	US-10453546-B2
Application number	US-201615526213-A
Country	US
Kind code	B2
Filing date	Oct 25, 2016
Priority date	Dec 9, 2015
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

The present disclosure provides a shift register, including: an input circuit, electrically connected to a triggering signal line that provides a triggering signal, a first clock signal line that provides a first clock signal, and a first node; configured for controlling whether the triggering signal is outputted to the first node based on the first clock signal; a control circuit, electrically connected to the first node, a second node, the first clock signal line, a second clock signal line that provides a second clock signal, and a turn-on signal line that provides a turn-on signal, configured for controlling whether the turn-on signal is outputted to the second node; and an output circuit, electrically connected to the first node, the second node, a first signal line that provides a first signal, a second signal line that provides a second signal, and a driving signal output line that outputs a driving signal.

First claim

What is claimed is:

1. A shift register, comprising:
an input circuit, electrically connected to a triggering signal line that provides a triggering signal, a first clock signal line that provides a first clock signal, and a first node, configured for controlling whether the triggering signal is outputted to the first node based on the first clock signal;
a control circuit comprising a first control unit and a second control unit, wherein:
the first control unit including a third transistor, a fourth transistor, a fifth transistor, and a first capacitor, configured for controlling whether a turn-on signal is outputted to a second node,
the third transistor has a gate electrode electrically connected to the first clock signal line, a source electrode electrically connected to a turn-on signal line that provides the turn-on signal, and a drain electrode electrically connected to a third node,
the fourth transistor has a gate electrode electrically connected to a second clock signal line that provides a second clock signal, a source electrode electrically connected to the turn-on signal line, and a drain electrode electrically connected to a source electrode of the fifth transistor,
the fifth transistor includes a gate electrode electrically connected to the third node, a drain electrode electrically connected to the second node, and the source electrode electrically connected to the drain electrode of the fourth transistor,
the first capacitor includes a first terminal electrically connected to the turn-on signal line and a second terminal electrically connected to the third node, and
the second control unit is electrically connected to a first signal line that provides a first signal, the first node and the second node, configured for controlling whether the first signal is outputted to the second node; and

an output circuit, electrically connected to the first node, the second node, the first signal line, a second signal line that provides a second signal, and a driving signal output line that outputs a driving signal, configured for responding to signals at the first node and the second node, selecting one of the first signal and the second signal as the driving signal, and providing the driving signal to the driving signal output line.

2. The shift register according to claim 1 , the input circuit comprising a first transistor, wherein the first transistor includes a gate electrode electrically connected to the first clock signal line, a drain electrode electrically connected to the first node, and a source electrode electrically connected to the triggering signal line.

3. The shift register according to claim 1 , wherein the second control unit comprises a sixth transistor, wherein the sixth transistor includes a gate electrode electrically connected to the first node, a source electrode electrically connected to the first signal line, and a drain electrode electrically connected to the second node.

4. The shift register according to claim 1 , the output circuit comprising a first output unit and a second output unit, wherein:
the first output unit is electrically connected to the first signal line, the second node, and the driving signal output line, configured for controlling the first signal to the driving signal output line based on a voltage of the second node; and
the second output unit is electrically connected to the second signal line, the first node, and the driving signal output line, configured for controlling the second signal to the driving signal output line based on a voltage of the first node.

5. The shift register according to claim 4 , the first output unit comprising a seventh transistor and a second capacitor, wherein:
the seventh transistor includes a gate electrode electrically connected to the second node, a drain electrode electrically connected to the driving signal output line, and a source electrode electrically connected to the first signal line; and
the second capacitor includes a first terminal electrically connected to the first signal line and a second terminal electrically connected to the second node.

6. The shift register according to claim 4 , the second output unit comprising an eighth transistor and a third capacitor, wherein:
the eighth transistor includes a gate electrode electrically connected to the first node, a drain electrode electrically connected to the driving signal output line, and a source electrode electrically connected to the second signal line; and
the third capacitor includes a first terminal electrically connected to the driving signal output line and a second terminal electrically connected to the first node.

7. The shift register according to claim 1 , further comprising a voltage-rectifying circuit, wherein the voltage-rectifying circuit is electrically connected to the first node, the second node, a third clock signal line that provides a third clock signal, and the first signal line, and configured to respond to the signal at the second node and the third clock signal, and control the first signal to be transmitted to the first node.

8. The shift register according to claim 6 , the voltage-rectifying circuit comprising a ninth transistor and a tenth transistor, wherein:
the ninth transistor includes a gate electrode electrically connected to the second node, a source electrode electrically connected to the first signal line, and a drain electrode electrically connected to a source electrode of the tenth transistor; and
the tenth transistor includes a gate electrode electrically connected to the third clock signal line, a drain electrode electrically connected to the first node, and the source electrode electrically connected to the drain electrode of the ninth transistor.

9. A gate driving circuit, comprising one or more cascading shift registers according to claim 1 .

10. A method for driving the shift register according to claim 1 , the method comprising:
controlling the input circuit to output the triggering signal to the first node;
controlling the input circuit to output no signal to maintain the first node at a first voltage level, and controlling the control circuit to output the turn-on signal to the second node to maintain the second node at a second voltage level, so that the output circuit, in response to the turn-on signal, outputs the first signal to the driving signal output line, the first signal having a same pulse width as the triggering signal; and
controlling the input circuit to output the triggering signal to the first node, wherein the control circuit, in response to the triggering signal, provides the first signal to the second node, and the output circuit, in response to the triggering signal, provides the second signal to the driving signal output line.

11. The method according to claim 10 , wherein:
controlling the input circuit to output the triggering signal to the first node is implemented in a triggering phase;
controlling the input circuit to output no signal to maintain the first node at the first voltage level, and controlling the control circuit to output the turn-on signal to the second node to maintain the second node at the second voltage level are implemented in a shifting phase; and
controlling the input circuit to output the triggering signal to the first node is implemented in an ending phase.

12. A shift register, comprising:
an input circuit, electrically connected to a triggering signal line that provides a triggering signal, a first clock signal line that provides a first clock signal, and a first node, configured for controlling whether the triggering signal is outputted to the first node based on the first clock signal;
a control circuit, ele

Assignees

• Boe Technology Group Co Ltd

Inventors

• Sun tuo
• Ma Zhanjie

Classifications

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G09G2310/0286

  Details of a shift registers arranged for use in a driving circuit · CPC title

• G11C19/186 Primary

  using only one transistor per capacitor, e.g. bucket brigade shift register · CPC title

• G09G2310/0267

  Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays · CPC title

• G09G3/3677

  suitable for active matrices only · CPC title