IP Library Granted Patent US 12,620,362
Granted Patent B2
US 12,620,362 · App. 19/017,323 · Granted May 5, 2026

Driving circuit

Inventors: Junhyun Park (Yongin-si, KR); Youngwan Seo (Yongin-si, KR); Soil Yoon (Yongin-si, KR)
Assignee: Samsung Display Co., Ltd.
G09G3/3266G09G3/3225G09G2300/0842G09G2310/0286
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Quick Facts
Patent No.
US 12,620,362
App. No.
19/017,323
Granted
May 5, 2026
Kind
B2
Abstract

A stage of a driving circuit includes seventh and eighth transistors electrically connected between a first terminal for receiving a first voltage and a second terminal for receiving a second voltage that is lower than the first voltage, ninth and tenth transistors electrically connected between the first and second terminals, and a fourth transistor including a gate electrically connected to a first node configured to receive the start signal and a back gate electrically connected to a third node, and electrically connected between the second terminal and a second node to which a gate of the eighth transistor is electrically connected, a fifth transistor electrically connected between the first node and the third node, and including a gate electrically connected to the second terminal, and a second capacitor electrically connected to the third node and to a second output node between the ninth and tenth transistors.

Claims (39)

1 . A driving circuit comprising stages, the stages comprising:

a first output circuit configured to output an output signal, and comprising a seventh transistor and an eighth transistor electrically connected between a first voltage input terminal for receiving a first voltage and a second voltage input terminal for receiving a second voltage that is lower than the first voltage;

a second output circuit configured to output a carry signal, and comprising a ninth transistor and a tenth transistor electrically connected between the first voltage input terminal and the second voltage input terminal; and

a control circuit electrically connected to the first output circuit, to the second output circuit, and to an input terminal configured to receive a start signal, and comprising:

a fourth transistor comprising a gate electrically connected to a first node configured to receive the start signal and a back gate electrically connected to a third node, and electrically connected between the second voltage input terminal and a second node to which a gate of the eighth transistor is electrically connected;

a fifth transistor electrically connected between the first node and the third node, and comprising a gate electrically connected to the second voltage input terminal; and

a second capacitor electrically connected to the third node and to a second output node between the ninth transistor and the tenth transistor.

2 . The driving circuit of claim 1 , wherein, when a voltage of the first node is at a high level, a voltage of the third node is at a high level that is substantially equal to the high level of the voltage of the first node, and

wherein, when the voltage of the first node is at a low level, the voltage of the third node is at a low level that is lower than the low level of the voltage of the first node.

3 . The driving circuit of claim 1 , wherein the fourth transistor comprises an N-channel transistor, and the fifth transistor comprises a P-channel transistor.

4 . The driving circuit of claim 3 , wherein the fourth transistor comprises an oxide transistor, and the fifth transistor comprises a silicon transistor.

5 . The driving circuit of claim 3 , wherein the first output circuit further comprises a sixth transistor electrically connected between the second voltage input terminal and a first output node between the seventh transistor and the eighth transistor, and comprising a gate electrically connected to the third node.

6 . The driving circuit of claim 1 , wherein the control circuit further comprises:

a first transistor electrically connected between the input terminal and the first node, and comprising a gate electrically connected to a first clock terminal configured to receive a first clock signal; and

a second transistor electrically connected between the input terminal and the first node, and comprising a gate electrically connected to a second clock terminal configured to receive a second clock signal.

7 . The driving circuit of claim 6 , wherein the second transistor further comprises a back gate electrically connected to a third terminal configured to receive a third voltage that is lower than the second voltage.

8 . The driving circuit of claim 6 , wherein the second clock signal is an inverted signal of the first clock signal.

9 . The driving circuit of claim 6 , wherein the control circuit further comprises a third transistor electrically connected between the first voltage input terminal and the second node, and comprising a gate electrically connected to the first node.

10 . The driving circuit of claim 1 , wherein the eighth transistor comprises a back gate electrically connected to a third terminal configured to receive a third voltage that is lower than the second voltage.

11 . The driving circuit of claim 1 , wherein the tenth transistor comprises a back gate electrically connected to a third terminal configured to receive a third voltage that is lower than the second voltage.

12 . The driving circuit of claim 1 , further comprising a third output circuit comprising a thirteenth transistor and a fourteenth transistor electrically connected between the first voltage input terminal and the second voltage input terminal, and configured to output a second carry signal,

wherein, when the carry signal is at a high level, the second carry signal is at a low level, and

wherein, when the carry signal is at a low level, the second carry signal is at a high level.

13 . The driving circuit of claim 12 , wherein the control circuit further comprises:

a twelfth transistor electrically connected between the second node and a fourth node, and comprising a gate electrically connected to the second voltage input terminal; and

a third capacitor electrically connected to the fourth node and to a third output node between the thirteenth transistor and the fourteenth transistor,

wherein the eighth transistor comprises a back gate electrically connected to the fourth node.

14 . The driving circuit of claim 13 , wherein, when a voltage of the second node is at a high level, a voltage of the fourth node is at a high level that is substantially equal to the high level of the voltage of the second node, and

wherein, when the voltage of the second node is at a low level, the voltage of the fourth node is at a low level that is lower than the low level of the voltage of the second node.

15 . A driving circuit comprising stages, the stages comprising: a seventh transistor and an eighth transistor electrically connected between a first voltage input terminal configured to receive a first voltage and a second voltage input terminal configured to receive a second voltage that is lower than the first voltage, and configured to transmit an output signal to a first output terminal; a ninth transistor and a tenth transistor electrically connected between the first voltage input terminal and the second voltage input terminal, and configured to transmit a carry signal to a second output terminal; a first transistor electrically connected between a first node and an input terminal configured to receive a start signal, and comprising a gate configured to receive a clock signal; a fourth transistor electrically connected between the second voltage input terminal and a second node to which a gate of the eighth transistor is electrically connected, and comprising a gate electrically connected to the first node and a back gate configured to receive an alternating current voltage; a fifth transistor electrically connected between the first node and a third node, and comprising a gate electrically connected to the second voltage input terminal; and a first capacitor electrically connected to the third node and to the second output terminal, wherein the back gate of the fourth transistor is electrically connected to the third node.

16 . The driving circuit of claim 15 , wherein, when a voltage of the first node is at a high level, a voltage of the third node is at a high level that is substantially equal to the high level of the voltage of the first node, and wherein, when the voltage of the first node is at a low level, the voltage of the third node is at a low level that is lower than the low level of the voltage of the first node.

17 . The driving circuit of claim 15 , further comprising a sixth transistor electrically connected between the first output terminal and the second voltage input terminal, and comprising a gate electrically connected to the third node.

18 . The driving circuit of claim 15 , further comprising:

a thirteenth transistor and a fourteenth transistor electrically connected between the first voltage input terminal and the second voltage input terminal, and configured to transmit a second carry signal to a third output terminal;

a twelfth transistor electrically connected between the second node and a fourth node, and comprising a gate electrically connected to the second voltage input terminal; and

a third capacitor electrically connected to the fourth node and to the third output terminal,

wherein the eighth transistor comprises a back gate electrically connected to the fourth node.

19 . The driving circuit of claim 18 , wherein, when a voltage of the second node is at a high level, a voltage of the fourth node is at a high level that is substantially equal to the high level of the voltage of the second node, and

wherein, when the voltage of the second node is at a low level, the voltage of the fourth node is at a low level that is lower than the low level of the voltage of the second node.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 22, 2025
From: PARK, JUNHYUN; SEO, YOUNGWAN; YOON, SOIL
To: SAMSUNG DISPLAY CO., LTD.
Reel/Frame 069963/0775 →
Priority Claims (1)
KR 10-2024-0027502 · Feb 26, 2024 · national
Continuity (1)
Related Publication 20250273162A1 · Aug 28, 2025
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