IP Library › Granted Patent US 9,865,220
Granted Patent B2
US 9,865,220 · App. 14/578,239 · Granted Jan 9, 2018

Gate driving circuit and display device

Inventor: Hu nan Ren (Shanghai, CN)
Assignees: SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD.; TIANMA MICRO-ELECTRONICS CO., LTD.
G09G3/3696G09G3/3677H03K3/012H03K17/161G09G2300/0417G09G2300/0426G09G2310/0286G09G2310/08G09G2330/021
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Quick Facts
Patent No.
US 9,865,220
App. No.
14/578,239
Granted
Jan 9, 2018
Kind
B2
Abstract

The present disclosure discloses a gate driving circuit and a display device, to avoid power consumption arising from overlapping of voltages output by the output ends of gate drivers in the case that the gate driving circuit is configured with a plurality of clock signals. The gate driving circuit includes: a plurality of gate scan lines, and N stages of gate drivers connected in cascade. Each stage of gate drivers includes a reset end and an output end, which provides a gate scan signal to a corresponding gate scan lines. The output end of a m-th stage gate driver is connected provides a reset signal to the reset end of a (m− 1 )-th stage of gate drivers, N and m are positive integers, and m<N.

Claims (57)

1. A gate driving circuit, comprising:

a plurality of gate scan lines; and

N stages of gate drivers connected in cascade, each stage of gate drivers comprising only one trigger signal input end configured to receive only one trigger signal, a first clock input end and a second clock input end, a reset signal input end, and an output end configured to provide a gate scan signal to a corresponding gate scan line;

wherein, the output end of a m-th-stage gate driver is configured to provide a reset signal to the reset signal input end of a (m−1)-th stage gate driver,

the output end of the m-th stage gate driver is connected with the trigger signal input end of a (m+2)-th stage gate driver to provide the only one trigger signal,

N and m being positive integers, and m<N, and

the first clock input end and the second clock input end receive two clock signals having a same cycle and opposite phases,

wherein the N stages of gate drivers comprise a first set of gate drivers, a second set of gate drivers, a plurality of clock signal lines,

wherein the plurality of clock signal lines comprise a first clock signal line, a second clock signal line, a third clock signal line, and a fourth clock signal line,

in the first set of gate drivers, the first clock signal input ends of odd-numbered stages of gate drivers are connected with the first clock signal line, the second clock signal input ends of the odd-numbered stages of gate driver are connected with the second clock signal line, the first clock signal input ends of even-numbered stages of gate driver are connected with the second clock signal line, and the second clock signal input ends of the even-numbered stages of gate driver are connected with the first clock signal line, and

in the second set of the gate drivers, the first clock signal input ends of odd-numbered stages of gate driver are connected with the third clock signal line, the second clock signal input ends of the odd-numbered stages of gate driver are connected with the fourth clock signal line, the first clock signal input ends of even-numbered stages of gate driver are connected with the fourth clock signal line, and the second clock signal input ends of the even-numbered stages of gate drivers are connected with the third clock signal line.

2. The gate driving circuit according to claim 1 , wherein the N stages of gate drivers further comprise a first trigger signal line, and a second trigger signal line; wherein the trigger signal input end of a first-stage gate driver in the first set is connected with the first trigger signal line to receive the only one trigger signal of the first-stage gate driver in the first set, and the trigger signal input end of a first-stage gate driver in the second set is connected with the second trigger signal line to receive the only one trigger signal of the first-stage gate driver in the second set; the output end of the m-th stage gate driver is connected with the trigger signal input end of a (m+2)-th stage gate driver to provide the only one trigger signal of the (m+2)-th stage gate driver, and the output end of the m-th-stage gate driver is further connected with the reset signal input end of the (m−1)-th stage gate driver;

the gate driving circuit further comprises a preset dummy gate driver, wherein the reset signal input end of a last-stage gate driver is connected with an output end of the preset dummy gate driver.

3. The gate driving circuit according to claim 1 , wherein

the first clock signal line and the second clock signal line are clock signal lines connected with a first clock signal controller, and having a same cycle and opposite phases; and

the third clock signal line and the fourth clock signal line are clock signal lines connected with a second clock signal controller and having a same cycle and opposite phases.

4. A gate driving circuit, comprising:

a plurality of gate scan lines; and

N stages of gate drivers connected in cascade, each stage of gate drivers comprises only one trigger signal input end configured to receive only one trigger signal, a first clock input end and a second clock input end, a reset signal input end, and an output end configured to provide a gate scan signal to a corresponding gate scan line, and the first clock input end and the second clock input end receive two clock signals having a same cycle and opposite phases,

wherein the N stages of gate drivers comprise a first set of gate drivers, a second set of gate drivers, a third set of gate drivers, a fourth set of gate drivers, a plurality of clock signal lines, a first trigger signal line, a second trigger signal line, a third trigger signal line, and a fourth trigger signal line;

wherein, the trigger signal input end of a first-stage gate driver in the first set is connected with the first trigger signal line to receive the only one trigger signal of the first-stage gate driver in the first set, the trigger signal input end of a first-stage gate driver in the second set is connected with the second trigger signal line to receive the only one trigger signal of the first-stage gate driver in the second set, the trigger signal input end of a first-stage gate driver in the third set is connected with the third trigger signal line to receive the only one trigger signal of the first-stage gate driver in the third set, the trigger signal input end of a first-stage gate driver in the fourth set is connected with the fourth trigger signal line to receive the only one trigger signal of the first-stage gate driver in the fourth set;

the output end of the m-th stage gate driver is connected with the trigger signal input end of a (m+4)-th stage gate driver to provide the only one trigger signal of the (m+4)-th stage gate driver, and the output end of the m-th stage gate driver is further connected with the reset signal input end of a (m−1)-th stage gate driver, N and m being positive integers, and m<N;

the gate driving circuit further comprising a preset dummy gate driver, wherein the reset signal input end of a last-stage gate driver in the gate drivers is connected with an output end of the preset dummy gate driver.

5. The gate driving circuit according to claim 4 , wherein the clock signal lines comprise a first clock signal line, a second clock signal line, a third clock signal line, a fourth clock signal line, a fifth clock signal line, a sixth clock signal line, a seventh clock signal line, and an eighth clock signal line;

in the first set of gate drivers, the first clock signal input ends of odd-numbered stages of gate drivers are connected with the first clock signal line, the second clock signal input ends of the odd-numbered stages of stages gate drivers are connected with the second clock signal line, the first clock signal input ends of even-numbered stages of gate drivers are connected with the second clock signal line, and the second clock signal input ends of the even-numbered stages of gate drivers are connected with the first clock signal line;

in the second set of gate drivers, the first clock signal input ends of odd-numbered stages of gate drivers are connected with the third clock signal line, the second clock signal input ends of the odd-numbered stages of gate drivers are connected with the fourth clock signal line, the first clock signal input ends of even-numbered stages of gate drivers are connected with the fourth clock signal line, and the second clock signal input ends of the even-numbered stages of gate drivers are connected with the third clock signal line;

in the third set of gate drivers, the first clock signal input ends of odd-numbered stages of gate drivers are connected with the fifth clock signal line, the second clock signal input ends of the odd-numbered stages of gate drivers are connected with the sixth clock signal line, the first clock signal input ends of even-numbered stages of gate drivers are connected with the sixth clock signal line, and the second clock signal input ends of the even-numbered stages of gate drivers are connected with the fifth clock signal line;

in the fourth set of gate drivers, the first clock signal input ends of odd-numbered stages of gate drivers are connected with the seventh clock signal line, the second clock signal input ends of the odd-numbered stages of gate drivers are connected with the eighth clock signal line, the first clock signal input ends of even-numbered stages of gate drivers are connected with the eighth clock signal line, and the second clock signal input ends of the even-numbered stages of gate drivers are connected with the seventh clock signal line.

6. The gate driving circuit according to claim 5 , wherein the first clock signal line and the second clock signal line are clock signal lines connected with a first clock signal controller and having a same cycle and opposite phases; the third clock signal line and the fourth clock signal line are clock signal lines connected with a second clock signal controller and having a same cycle and opposite phases; the fifth clock signal line and the sixth clock signal line are clock signal lines connected with a third clock signal controller and having a same cycle and opposite phases; and the seventh clock signal line and the eighth clock signal line are clock signal lines connected with a fourth clock signal controller and having a same clock cycle and opposite phases.

7. A gate driving circuit, comprising:

a plurality of gate scan lines; and

N stages of gate drivers connected in cascade, each stage of gate drivers comprising a reset signal input end and an output end configured to provide a gate scan signal to a corresponding gate scan line;

wherein, the output end of a m-th-stage gate driver is configured to provide a reset signal to the reset signal input end of a (m−1)-th stage gate driver,

N and m being positive integers, and m<N,

wherein each stage of gate drivers comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, a first capacitor, and a second capacitor;

a gate of the first transistor is connected with a trigger signal input end, a drain of the first transistor is connected with a drain of the second transistor, and a source of the first transistor is connected with a high-level signal input end;

a gate of the second transistor is connected with a first reset signal input end, and a source of the second transistor is connected with a low-level signal input end;

a gate of the third transistor is connected with a gate of the sixth transistor, a drain of the third transistor is connected with the drain of the second transistor, and a source of the third transistor is connected with the low-level signal input end;

a gate of the fourth transistor is connected with the first reset signal input end, a source of the fourth transistor is connected with the low-level signal input end, and a drain of the fourth transistor is connected with the output end;

a gate of the fifth transistor is connected with a first electrode of the second capacitor and the drain of the first transistor, a drain of the fifth transistor is connected with a drain of the sixth transistor, and a source of the fifth transistor is connected with a first clock signal input end;

a gate of the sixth transistor is connected with the gate of the third transistor, a source of the sixth transistor is connected with the low-level signal input end, and a drain of the sixth transistor is connected with a drain of the seventh transistor;

a gate of the seventh transistor is connected with a second clock signal input end, and a source of the seventh transistor is connected with the low-level signal input end;

a gate of the eighth transistor is connected with a second reset signal input end, a source of the eighth transistor is connected with the low-level signal input end, and a drain of the eighth transistor is connected with a second electrode of the second capacitor;

a gate of the ninth transistor is connected with the second reset signal input end, a source of the ninth transistor is connected with the low-level signal input end, and a drain of the ninth transistor is connected with the gate of the fifth transistor, a gate of the tenth transistor and the drain of the first transistor;

the gate of the tenth transistor is connected with the drain of the first transistor, a source of the tenth transistor is connected with the low-level signal input end, and a drain of the tenth transistor is connected with a first electrode of the first capacitor, a second electrode of the first capacitor is connected with the first clock signal input end.

8. The gate driving circuit according to claim 7 , wherein the output end of the m-th stage gate driver is electrically connected with the reset signal input end of the (m−1)-th stage gate driver.

9. A display device, comprising a gate driving circuit, wherein the gate driving circuit comprises:

a plurality of gate scan lines; and

N stages of gate drivers connected in cascade, each stage of gate drivers comprising only one trigger signal input end configured to receive only one trigger signal, a first clock input end and a second clock input end, a reset signal input end, and an output end configured to provide a gate scan signal to a corresponding gate scan line;

wherein, the output end of a m-th-stage gate driver is configured to provide a reset signal to the reset signal input end of a (m−1)-th stage gate driver,

the output end of the m-th stage gate driver is connected with the trigger signal input end of a (m+2)-th stage gate driver to provide the only one trigger signal,

N and m being positive integers, and m<N,

the first clock input end and the second clock input end receive two clock signals having a same cycle and opposite phases,

wherein the N stages of gate drivers comprise a first set of gate drivers, a second set of gate drivers, a plurality of clock signal lines,

wherein the plurality of clock signal lines comprise a first clock signal line, a second clock signal line, a third clock signal line, and a fourth clock signal line,

in the first set of gate drivers, the first clock signal input ends of odd-numbered stages of gate drivers are connected with the first clock signal line, the second clock signal input ends of the odd-numbered stages of gate driver are connected with the second clock signal line, the first clock signal input ends of even-numbered stages of gate driver are connected with the second clock signal line, and the second clock signal input ends of the even-numbered stages of gate driver are connected with the first clock signal line, and

in the second set of the gate drivers, the first clock signal input ends of odd-numbered stages of gate driver are connected with the third clock signal line, the second clock signal input ends of the odd-numbered stages of gate driver are connected with the fourth clock signal line, the first clock signal input ends of even-numbered stages of gate driver are connected with the fourth clock signal line, and the second clock signal input ends of the even-numbered stages of gate drivers are connected with the third clock signal line.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 19, 2014
From: REN, HU NAN
To: SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD.; TIANMA MICRO-ELECTRONICS CO., LTD.
Reel/Frame 034688/0013 →
Priority Claims (1)
CN 2013 1 0754474 · Dec 31, 2013 · national
Continuity (1)
Related Publication 20150187320A1 · Jul 2, 2015