Driving circuit and driving method, and display panel and display device

Abstract

The present invention relates to a driving circuit and a driving method, and a display panel and a display device. The driving circuit comprises a plurality of rows of pixel circuits and a timing controller. Each pixel circuit comprises a switching transistor, a driving transistor, a storage capacitor and a light-emitting element, wherein a gate electrode of the switching transistor is electrically connected to a scan signal line, a source electrode of the switching transistor is electrically connected to a data signal line, a drain electrode of the switching transistor is electrically connected to a gate electrode of the driving transistor, and the timing controller provides a timing signal to drive the pixel circuit. Within the same frame period in an operating state, one of the light-emitting elements of odd-row pixel circuits and the light-emitting elements of even-row pixel circuits emits light, and the other one thereof does not emit light. When not emitting light, driving transistors T1 in pixel circuits are subjected to the same relatively large Vgs voltage stress, such that the electrical characteristics of the driving transistors T1 in full-screen pixels are not affected by a displayed image and remain consistent, thereby ameliorating the problem of display non-uniformity caused by differences in threshold value voltages of the driving transistors T1.

Description

Driving circuit and driving method, display panel, and display device

[0001] TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a driving circuit and driving method, a display panel and a display device.

Claims

1. A driving circuit, characterized in that, Includes multi-row pixel circuitry and timing controller; The pixel circuit includes a switching transistor, a driving transistor, a storage capacitor, and a light-emitting element; The gate of the switching transistor is electrically connected to the scan signal line, the source of the switching transistor is electrically connected to the data signal line, and the drain of the switching transistor is electrically connected to the gate of the driving transistor. The source and drain of the driving transistor are electrically connected to the first power signal line and the first electrode of the light-emitting element, respectively. The second electrode of the light-emitting element is electrically connected to the second power signal line. One end of the storage capacitor is electrically connected to both the drain of the switching transistor and the gate of the driving transistor. The other end of the storage capacitor is electrically connected to the source of the driving transistor. The timing controller provides timing signals to all the pixel circuits through the scan signal line, the data signal line, and the first power signal line. The timing signals include a first timing signal and a second timing signal. The first timing signal drives the odd-numbered row pixel circuits, and the second timing signal drives the even-numbered row pixel circuits. During the same frame time in the working state, one of the light-emitting elements in the odd-numbered row pixel circuits and the even-numbered row pixel circuits emits light, while the other does not emit light. In the light-emitting state, the voltage difference between the gate and source of the driving transistor in the odd-numbered row pixel circuits and the even-numbered row pixel circuits is the same, and this voltage difference satisfies the threshold turn-on voltage of the driving transistor.

2. The driving circuit according to claim 1, characterized in that, The driving transistor is an N-channel thin-film transistor; The drain of the driving transistor is electrically connected to the first power signal line, and the source of the driving transistor is electrically connected to the first electrode of the light-emitting element.

3. The driving circuit according to claim 1, characterized in that, The driving transistor is a P-channel thin-film transistor; The source of the driving transistor is electrically connected to the first power signal line, and the drain of the driving transistor is electrically connected to the first electrode of the light-emitting element.

4. The driving circuit according to claim 1, characterized in that, The light-emitting element includes an organic light-emitting diode.

5. A driving method, characterized in that, The driving method is used to drive the driving circuit as described in claim 1, and the driving method includes: The timing controller generates a first timing signal for driving the odd-numbered row pixel circuits and a second timing signal for driving the even-numbered row pixel circuits, respectively. Driving steps: The odd-numbered row pixel circuit receives and responds to the first timing signal to drive the corresponding light-emitting element, and the even-numbered row pixel circuit receives and responds to the second timing signal to drive the corresponding light-emitting element; and within the same frame time of the working state, one of the light-emitting elements of the odd-numbered row pixel circuit and the light-emitting element of the even-numbered row pixel circuit emits light, while the other does not emit light.

6. The driving method according to claim 5, characterized in that, The driving transistor is an N-channel thin-film transistor, and the driving step includes: Odd-row driven: First frame reset phase: A high level is input to the scan signal line, the switching transistor is turned on, and corresponding level signals are input to the data signal line and the first power supply signal line, and the storage capacitor is charged; First frame change phase: Input the corresponding display screen change level signal to the data signal line, and at the same time input the corresponding level signal to the scan signal line and the first power signal line; First frame maintenance phase: When a low level is input to the scan signal line, the switching transistor is turned off. At the same time, corresponding level signals are input to the data signal line and the first power signal line to drive the transistor to turn on. Current flows from the drain of the driving transistor to the source, and the light-emitting element emits light. Second frame reset phase: A high level is input to the scan signal line, the switching transistor is turned on, and corresponding level signals are input to the data signal line and the first power supply signal line at the same time; Second frame maintenance phase: When a low level is input to the scan signal line, the switching transistor is turned off. At the same time, a corresponding level signal is input to the data signal line. The level signal input to the first power signal line remains unchanged, and the light-emitting element does not emit light. Even-row driven: First frame reset phase: A high level is input to the scan signal line, the switching transistor is turned on, and corresponding level signals are input to the data signal line and the first power supply signal line at the same time; First frame maintenance phase: When a low level is input to the scan signal line, the switching transistor is turned off. At the same time, a corresponding level signal is input to the data signal line and a corresponding level signal is input to the first power signal line. The light-emitting element does not emit light. Second frame reset phase: A high level is input to the scan signal line, the switching transistor is turned on, and corresponding level signals are input to the data signal line and the first power signal line at the same time, the storage capacitor is charged; a corresponding changing level signal is input to the data signal line, and a corresponding level signal is input to the scan signal line at the same time, while the level signal input to the first power signal line remains unchanged; Second frame maintenance phase: A low level is input to the scan signal line, the switching transistor is turned off, and corresponding level signals are input to the data signal line and the first power signal line to drive the transistor to turn on. Current flows from the drain of the driving transistor to the source, and the light-emitting element emits light.

7. The driving method according to claim 5, characterized in that, The driving transistor is a P-channel thin-film transistor, and the driving step includes: Odd-row driven: First frame reset phase: A low level is input to the scan signal line, the switching transistor is turned on, and corresponding level signals are input to the data signal line and the first power signal line, and the storage capacitor is charged; the level signal corresponding to the display screen is input to the data signal line, while the level signals input to the scan signal line and the first power signal line remain unchanged; First frame maintenance phase: A high level is input to the scan signal line, the switching transistor is turned off, and corresponding level signals are input to the data signal line and the first power signal line to drive the transistor to turn on. Current flows from the source to the drain of the driving transistor, and the light-emitting element emits light. Second frame reset phase: A low level is input to the scan signal line, the switching transistor is turned on, and corresponding level signals are input to the data signal line and the first power supply signal line at the same time; Second frame maintenance phase: A high level is input to the scan signal line, the switching transistor is turned off, and a corresponding level signal is input to the data signal line at the same time. The level signal input to the first power signal line remains unchanged, and the light-emitting element does not emit light. Even-row driven: First frame reset phase: A low level is input to the scan signal line, the switching transistor is turned on, and corresponding level signals are input to the data signal line and the first power supply signal line at the same time; First frame maintenance phase: When a high level is input to the scan signal line, the switching transistor is turned off. At the same time, a corresponding level signal is input to the data signal line. The level signal input to the first power signal line remains unchanged, and the light-emitting element does not emit light. Second frame reset phase: A low level is input to the scan signal line, the switching transistor is turned on, and corresponding level signals are input to the data signal line and the first power signal line, charging the storage capacitor; a corresponding changing level signal is input to the data signal line, while the level signals input to the scan signal line and the first power signal line remain unchanged; Second frame maintenance phase: A high level is input to the scan signal line, the switching transistor is turned off, and corresponding level signals are input to the data signal line and the first power signal line to drive the transistor to turn on. Current flows from the source to the drain of the driving transistor, and the light-emitting element emits light.

8. The driving method according to claim 6 or 7, characterized in that, In both the odd-row drive and the even-row drive, the total duration of each frame is the same.

9. A display panel, characterized in that, Includes the driving circuit as described in any one of claims 1 to 4.

10. A display device, characterized in that, Includes the display panel as described in claim 9.

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