CN-121986374-A - Pixel driving circuit, driving method thereof and display device

Abstract

A pixel driving circuit includes a coupling sub-circuit, a holding sub-circuit, and a coupling sub-circuit electrically connected to a second scan signal terminal (Gate 2), a third scan signal terminal (Gate 3), a fifth scan signal terminal (Gate 5), a Data signal terminal (Data), a second input signal terminal (IN 2), and a third node (N3), respectively, and configured to couple signals of the Data signal terminal (Data) or the second input signal terminal (IN 2) to the third node (N3) under control of signals of the second scan signal terminal (Gate 2), the third scan signal terminal (Gate 3), and the fifth scan signal terminal (Gate 5) at least partially overlaps with a period IN which at least one of the second scan signal terminal (Gate 2) and the third scan signal terminal (Gate 3) is an active level signal.

Inventors

• HUANG YAO
• HU MING

Assignees

• 京东方科技集团股份有限公司
• 成都京东方显示技术有限公司
• 北京京东方技术开发有限公司

Dates

Publication Date

20260505

Application Date

20241226

Priority Date

20240827

Claims (18)

1. A pixel driving circuit includes a driving sub-circuit, a coupling sub-circuit, a holding sub-circuit, a first initializing sub-circuit, and a light emission control sub-circuit; The driving sub-circuit is respectively and electrically connected with the first node, the second node and the third node and is configured to provide a driving signal for the third node under the control of signals of the first node and the second node; The first initial sub-circuit is electrically connected with the first input signal end, the first scanning signal end and the first node respectively and is configured to provide the signal of the first input signal end for the first node under the control of the signal of the first scanning signal end; The coupling sub-circuit is electrically connected with the second scanning signal end, the third scanning signal end, the fifth scanning signal end, the data signal end, the second input signal end and the third node respectively, and is configured to couple the data signal end or the signal of the second input signal end to the third node under the control of the signals of the second scanning signal end, the third scanning signal end and the fifth scanning signal end; The holding sub-circuit is respectively and electrically connected with the first node and the third node and is configured to store the voltage difference of signals of the first node and the third node; The light-emitting control sub-circuit is respectively and electrically connected with the first light-emitting signal end, the second light-emitting signal end, the first power supply end, the second node and the fifth node, and is configured to provide a signal of the first power supply end for the second node and a signal of the third node for the fifth node under the control of signals of the first light-emitting signal end and the second light-emitting signal end; The period of time when the signal of the fifth scanning signal terminal is an effective level signal at least partially overlaps with the period of time when at least one of the second scanning signal terminal and the third scanning signal terminal is an effective level signal.
2. The pixel driving circuit according to claim 1, wherein the signal received by the second scanning signal terminal connected to the i-th row pixel driving circuit and the signal received by the first scanning signal terminal connected to the i-M-th row pixel driving circuit are the same signal, and M is a positive integer greater than 1.
3. The pixel driving circuit according to claim 1, wherein the coupling sub-circuit comprises a data writing sub-circuit, an initial writing sub-circuit, a communicating sub-circuit, and a voltage stabilizing sub-circuit; the data writing sub-circuit is respectively and electrically connected with the third scanning signal end, the data signal end and the fourth node and is configured to provide signals of the data signal end for the fourth node under the control of signals of the third scanning signal end; The initial writing sub-circuit is respectively and electrically connected with the second scanning signal end, the second input signal end and the fourth node, and is configured to provide the signal of the second input signal end for the fourth node under the control of the signal of the second scanning signal end; the voltage stabilizing sub-circuit is respectively and electrically connected with the third node and the sixth node and is configured to store the voltage difference between signals of the third node and the sixth node; The communication sub-circuit is electrically connected with the fifth scanning signal end, the fourth node and the sixth node respectively and is configured to provide the signal of the fourth node for the sixth node under the control of the signal of the fifth scanning signal end.
4. The pixel driving circuit according to claim 1, wherein the coupling sub-circuit comprises a data writing sub-circuit, an initial writing sub-circuit, a communicating sub-circuit, and a voltage stabilizing sub-circuit; the data writing sub-circuit is respectively and electrically connected with the third scanning signal end, the data signal end and the fourth node and is configured to provide signals of the data signal end for the fourth node under the control of signals of the third scanning signal end; The initial writing sub-circuit is respectively and electrically connected with the second scanning signal end, the second input signal end and the fourth node, and is configured to provide the signal of the second input signal end for the fourth node under the control of the signal of the second scanning signal end; The voltage stabilizing sub-circuit is respectively and electrically connected with the fourth node and the sixth node and is configured to store the voltage difference between signals of the fourth node and the sixth node; The communication sub-circuit is electrically connected with the fifth scanning signal end, the third node and the sixth node respectively and is configured to provide the signal of the sixth node for the third node under the control of the signal of the fifth scanning signal end.
5. The pixel driving circuit according to claim 3 or 4, wherein the data writing sub-circuit includes a fourth transistor, and the initial writing sub-circuit includes a second transistor; The control electrode of the second transistor is electrically connected with the second scanning signal end, the first electrode of the second transistor is electrically connected with the second input signal end, and the second electrode of the second transistor is electrically connected with the fourth node; the control electrode of the fourth transistor is electrically connected with the third scanning signal end, the first electrode of the fourth transistor is electrically connected with the data signal end, and the second electrode of the fourth transistor is electrically connected with the fourth node.
6. The pixel driving circuit according to claim 3, wherein the communication sub-circuit includes an eighth transistor, and the voltage stabilizing sub-circuit includes a second capacitor; The control electrode of the eighth transistor is electrically connected with the fifth scanning signal end, the first electrode of the eighth transistor is electrically connected with the fourth node, and the second electrode of the eighth transistor is electrically connected with the sixth node; The first end of the second capacitor is electrically connected with the third node, and the second end of the second capacitor is electrically connected with the sixth node.
7. The pixel driving circuit according to claim 4, wherein the communication sub-circuit includes an eighth transistor, and the voltage stabilizing sub-circuit includes a second capacitor; the control electrode of the eighth transistor is electrically connected with the fifth scanning signal end, the first electrode of the eighth transistor is electrically connected with the third node, and the second electrode of the eighth transistor is electrically connected with the sixth node; The first end of the second capacitor is electrically connected with the fourth node, and the second end of the second capacitor is electrically connected with the sixth node.
8. The pixel driving circuit according to claim 1, further comprising a second initial sub-circuit; The second initial sub-circuit is electrically connected with the fourth scanning signal end, the third input signal end and the fifth node respectively and is configured to provide the signal of the third input signal end for the fifth node under the control of the signal of the fourth scanning signal end.
9. The pixel driving circuit according to claim 1, wherein the first initial sub-circuit includes a first transistor, the holding sub-circuit includes a first capacitor, the driving sub-circuit includes a third transistor including a first control electrode and a second control electrode, and the light emission control sub-circuit includes a fifth transistor and a sixth transistor; the control electrode of the first transistor is electrically connected with the first scanning signal end, the first electrode of the first transistor is electrically connected with the first input signal end, and the second electrode of the first transistor is electrically connected with the first node; A first control electrode of the third transistor is electrically connected with the first node, a second control electrode of the third transistor is electrically connected with the third node, the first electrode of the third transistor is electrically connected with the second node, and the second electrode of the third transistor is electrically connected with the third node; the control electrode of the fifth transistor is electrically connected with the first luminous signal end, the first electrode of the fifth transistor is electrically connected with the first power end, and the second electrode of the fifth transistor is electrically connected with the second node; the control electrode of the sixth transistor is electrically connected with the second light-emitting signal end, the first electrode of the sixth transistor is electrically connected with the third node, and the second electrode of the sixth transistor is electrically connected with the fifth node; The first end of the first capacitor is electrically connected with the first node, and the second end of the first capacitor is electrically connected with the third node.
10. The pixel driving circuit according to claim 8, wherein the second initial sub-circuit comprises a seventh transistor; The control electrode of the seventh transistor is electrically connected with the fourth scanning signal end, the first electrode of the seventh transistor is electrically connected with the third input signal end, and the second electrode of the seventh transistor is electrically connected with the fifth node.
11. The pixel driving circuit of claim 1, further comprising a second initial sub-circuit, wherein the coupling sub-circuit comprises a second transistor, a fourth transistor, an eighth transistor, and a second capacitor, the holding sub-circuit comprises a first capacitor, the driving sub-circuit comprises a third transistor, the first initial sub-circuit comprises a first transistor, the second initial sub-circuit comprises a seventh transistor, the light emission control sub-circuit comprises a fifth transistor and a sixth transistor, and the third transistor comprises a first control electrode and a second control electrode; the control electrode of the first transistor is electrically connected with the first scanning signal end, the first electrode of the first transistor is electrically connected with the first input signal end, and the second electrode of the first transistor is electrically connected with the first node; The control electrode of the second transistor is electrically connected with the second scanning signal end, the first electrode of the second transistor is electrically connected with the second input signal end, and the second electrode of the second transistor is electrically connected with the fourth node; A first control electrode of the third transistor is electrically connected with the first node, a second control electrode of the third transistor is electrically connected with the third node, the first electrode of the third transistor is electrically connected with the second node, and the second electrode of the third transistor is electrically connected with the third node; the control electrode of the fourth transistor is electrically connected with the third scanning signal end, the first electrode of the fourth transistor is electrically connected with the data signal end, and the second electrode of the fourth transistor is electrically connected with the fourth node; the control electrode of the fifth transistor is electrically connected with the first luminous signal end, the first electrode of the fifth transistor is electrically connected with the first power end, and the second electrode of the fifth transistor is electrically connected with the second node; the control electrode of the sixth transistor is electrically connected with the second light-emitting signal end, the first electrode of the sixth transistor is electrically connected with the third node, and the second electrode of the sixth transistor is electrically connected with the fifth node; The control electrode of the seventh transistor is electrically connected with the fourth scanning signal end, the first electrode of the seventh transistor is electrically connected with the third input signal end, and the second electrode of the seventh transistor is electrically connected with the fifth node; The control electrode of the eighth transistor is electrically connected with the fifth scanning signal end, the first electrode of the eighth transistor is electrically connected with the fourth node, and the second electrode of the eighth transistor is electrically connected with the sixth node; the first end of the first capacitor is electrically connected with the first node, and the second end of the first capacitor is electrically connected with the third node; The first end of the second capacitor is electrically connected with the third node, and the second end of the second capacitor is electrically connected with the sixth node.
12. The pixel driving circuit of claim 1, further comprising a second initial sub-circuit, wherein the coupling sub-circuit comprises a second transistor, a fourth transistor, an eighth transistor, and a second capacitor, the holding sub-circuit comprises a first capacitor, the driving sub-circuit comprises a third transistor, the first initial sub-circuit comprises a first transistor, the second initial sub-circuit comprises a seventh transistor, the light emission control sub-circuit comprises a fifth transistor and a sixth transistor, and the third transistor comprises a first control electrode and a second control electrode; the control electrode of the first transistor is electrically connected with the first scanning signal end, the first electrode of the first transistor is electrically connected with the first input signal end, and the second electrode of the first transistor is electrically connected with the first node; The control electrode of the second transistor is electrically connected with the second scanning signal end, the first electrode of the second transistor is electrically connected with the second input signal end, and the second electrode of the second transistor is electrically connected with the fourth node; A first control electrode of the third transistor is electrically connected with the first node, a second control electrode of the third transistor is electrically connected with the third node, the first electrode of the third transistor is electrically connected with the second node, and the second electrode of the third transistor is electrically connected with the third node; the control electrode of the fourth transistor is electrically connected with the third scanning signal end, the first electrode of the fourth transistor is electrically connected with the data signal end, and the second electrode of the fourth transistor is electrically connected with the fourth node; the control electrode of the fifth transistor is electrically connected with the first luminous signal end, the first electrode of the fifth transistor is electrically connected with the first power end, and the second electrode of the fifth transistor is electrically connected with the second node; the control electrode of the sixth transistor is electrically connected with the second light-emitting signal end, the first electrode of the sixth transistor is electrically connected with the third node, and the second electrode of the sixth transistor is electrically connected with the fifth node; The control electrode of the seventh transistor is electrically connected with the fourth scanning signal end, the first electrode of the seventh transistor is electrically connected with the third input signal end, and the second electrode of the seventh transistor is electrically connected with the fifth node; the control electrode of the eighth transistor is electrically connected with the fifth scanning signal end, the first electrode of the eighth transistor is electrically connected with the third node, and the second electrode of the eighth transistor is electrically connected with the sixth node; the first end of the first capacitor is electrically connected with the first node, and the second end of the first capacitor is electrically connected with the third node; The first end of the second capacitor is electrically connected with the fourth node, and the second end of the second capacitor is electrically connected with the sixth node.
13. A pixel driving circuit according to claim 11 or 12, wherein at least one of the first to eighth transistors is an N-type transistor, or at least one of the first to fourth, sixth to eighth transistors is an N-type transistor, and the fifth transistor is a P-type transistor.
14. The pixel driving circuit according to claim 1, wherein the signal received by the second input signal terminal connected to the same pixel driving circuit is the same as the signal received by the first input signal terminal.
15. The pixel driving circuit according to claim 1, wherein the display substrate is provided with a plurality of display frames, at least one of which includes a refresh frame and at least one hold frame; In the refresh frame of at least one display frame, the signal of the fifth scanning signal terminal is an active level signal in a part of time period, and in the hold frame of at least one display frame, the signal of the fifth scanning signal terminal is an inactive level signal.
16. A display device comprising a display region and a non-display region disposed on at least one side of the display region, the pixel driving circuit according to any one of claims 1 to 15 being disposed in an array arrangement in the display region; the non-display area is provided with a driving circuit group, wherein the driving circuit group comprises a first driving circuit, a second driving circuit and a first driving circuit, wherein the first driving circuit comprises a plurality of cascaded first shift registers; The second scanning signal end connected with the pixel driving circuit of at least one row is connected with the same first shift register with the first scanning signal end connected with the pixel driving circuit of the previous M rows.
17. The display device according to claim 16, wherein signal lines connected to fifth scanning signal terminals connected to at least two pixel driving circuits in the same row of pixel driving circuits are different.
18. A driving method of a pixel driving circuit configured to drive the pixel driving circuit according to any one of claims 1 to 15, the method comprising: the driving sub-circuit provides a driving signal to the third node under the control of signals of the first node and the second node; The first initial sub-circuit provides a signal of a first input signal end for a first node under the control of a signal of a first scanning signal end; The coupling sub-circuit couples the signals of the data signal end or the second input signal end to the third node under the control of the signals of the second scanning signal end, the third scanning signal end and the fifth scanning signal end; The holding sub-circuit stores a voltage difference of signals of the first node and the third node; The light-emitting control sub-circuit provides a signal of the first power supply end for the second node and provides a signal of the third node for the fifth node under the control of signals of the first light-emitting signal end and the second light-emitting signal end.

Description

Pixel driving circuit, driving method thereof and display device The present application claims priority from chinese patent application filed at 2024, 8, 27, with application number 202411187376.8, entitled "pixel driving circuit and driving method thereof, display device", the contents of which are to be understood as being incorporated herein by reference. Technical Field The present disclosure relates to the field of display technologies, and in particular, to a pixel driving circuit, a driving method thereof, and a display device. Background Organic LIGHT EMITTING Diodes (OLED) and Quantum-dot LIGHT EMITTING Diodes (QLED) are active light emitting display devices, and have advantages of self-luminescence, wide viewing angle, high contrast ratio, low power consumption, extremely high reaction speed, light weight, flexibility, low cost, and the like. With the continuous development of Display technology, a Flexible Display device (Flexible Display) using an OLED or a QLED as a light emitting device and a thin film transistor (Thin Film Transistor, abbreviated as TFT) for signal control has become a mainstream product in the current Display field. Disclosure of Invention The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. The disclosure provides a pixel driving circuit, a driving method thereof and a display device. In a first aspect, the present disclosure provides a pixel driving circuit including a driving sub-circuit, a coupling sub-circuit, a holding sub-circuit, a first initializing sub-circuit, and a light emission control sub-circuit; The driving sub-circuit is respectively and electrically connected with the first node, the second node and the third node and is configured to provide a driving signal for the third node under the control of signals of the first node and the second node; The first initial sub-circuit is electrically connected with the first input signal end, the first scanning signal end and the first node respectively and is configured to provide the signal of the first input signal end for the first node under the control of the signal of the first scanning signal end; The coupling sub-circuit is electrically connected with the second scanning signal end, the third scanning signal end, the fifth scanning signal end, the data signal end, the second input signal end and the third node respectively, and is configured to couple the data signal end or the signal of the second input signal end to the third node under the control of the signals of the second scanning signal end, the third scanning signal end and the fifth scanning signal end; The holding sub-circuit is respectively and electrically connected with the first node and the third node and is configured to store the voltage difference of signals of the first node and the third node; The light-emitting control sub-circuit is respectively and electrically connected with the first light-emitting signal end, the second light-emitting signal end, the first power supply end, the second node and the fifth node, and is configured to provide a signal of the first power supply end for the second node and a signal of the third node for the fifth node under the control of signals of the first light-emitting signal end and the second light-emitting signal end; The period of time when the signal of the fifth scanning signal terminal is an effective level signal at least partially overlaps with the period of time when at least one of the second scanning signal terminal and the third scanning signal terminal is an effective level signal. In an exemplary embodiment, the signal received by the second scanning signal terminal connected to the i-th row pixel driving circuit and the signal received by the first scanning signal terminal connected to the i-M-th row pixel driving circuit are the same signal, and M is a positive integer greater than 1. In an exemplary embodiment, the coupling sub-circuit includes a data write sub-circuit, an initial write sub-circuit, a communication sub-circuit, and a voltage stabilizing sub-circuit; the data writing sub-circuit is respectively and electrically connected with the third scanning signal end, the data signal end and the fourth node and is configured to provide signals of the data signal end for the fourth node under the control of signals of the third scanning signal end; The initial writing sub-circuit is respectively and electrically connected with the second scanning signal end, the second input signal end and the fourth node, and is configured to provide the signal of the second input signal end for the fourth node under the control of the signal of the second scanning signal end; the voltage stabilizing sub-circuit is respectively and electrically connected with the third node and the sixth node and is configured to store the voltage difference between signals of the third node and the sixth node; The communicat