CN-119400104-B - Level conversion circuit, driving method, display panel, circuit board and display device

Abstract

The application discloses a level conversion circuit, a driving method, a display panel, a circuit board and a display device. The level conversion circuit is electrically connected between the driving chip and the gate driving circuit and is used for converting a first driving signal of the driving chip into a second driving signal, the second driving signal is used for driving the gate driving circuit, the difference value between the high level and the low level of the first driving signal is a first difference value, the difference value between the high level and the low level of the second driving signal is a second difference value, and the second difference value is larger than the first difference value. According to the embodiment of the application, the level conversion circuit is introduced, so that the difference value between the high level and the low level of the driving signal output by the display driving chip is increased, the effective utilization of the existing display driving chip is realized, and the waste of resources can be reduced while the larger voltage-crossing requirement is met.

Inventors

• XIE HONGJUN
• SHI SHIYONG

Assignees

• 合肥维信诺科技有限公司

Dates

Publication Date

20260508

Application Date

20241008

Claims (20)

1. 1. The level conversion circuit is characterized by being electrically connected between a driving chip and a grid driving circuit and used for converting a first driving signal of the driving chip into a second driving signal, wherein the second driving signal is used for driving the grid driving circuit, the difference value of the high level and the low level of the first driving signal is a first difference value, the difference value of the high level and the low level of the second driving signal is a second difference value, and the second difference value is larger than the first difference value; the level shift circuit includes: The first end of the first output module is electrically connected with the first power supply end, and the second end of the first output module is electrically connected with the grid driving circuit; The first end of the second output module is electrically connected with the second power supply end, the second end of the second output module is electrically connected with the grid driving circuit, and the control end of the second output module is connected with the first driving signal; The first end of the output control module is electrically connected with the reference power supply end, the second end of the output control module is electrically connected with the control end of the first output module, and the control end of the output control module is connected with the first driving signal; under the control of the output control module and the first driving signal, the first output module and the second output module are alternately conducted; One of the first power supply end and the second power supply end is in a high level, the other is in a low level, and the low level of the first power supply end is smaller than the low level of the first driving signal when the first power supply end is in the low level; the high level of the second power supply terminal is greater than or equal to the high level of the first driving signal when the first power supply terminal is at a low level, and the low level of the second power supply terminal is less than or equal to the low level of the first driving signal when the first power supply terminal is at a high level.
2. 2. The level shifter circuit of claim 1, wherein the high level of the second driving signal corresponds to the low level of the first driving signal at the same time or the low level of the second driving signal corresponds to the high level of the first driving signal at the same time.
3. 3. The level shift circuit of claim 2, the high level of the second drive signal being equal to the high level of the first drive signal, the low level of the second drive signal being less than the low level of the first drive signal; Or the high level of the second driving signal is larger than the high level of the first driving signal, and the low level of the second driving signal is equal to the low level of the first driving signal.
4. 4. The level shifter circuit of claim 1, wherein the first output module comprises a first transistor having a first pole as a first terminal of the first output module and a second pole as a second terminal of the first output module, and a gate as a control terminal of the first output module; The second output module comprises a second transistor, a first pole of the second transistor is used as a first end of the second output module, a second pole of the second transistor is used as a second end of the second output module, and a grid electrode of the second transistor is used as a control end of the second output module; the output control module comprises a third transistor, a first pole of the third transistor is used as a first end of the output control module, a second pole of the third transistor is used as a second end of the output control module, and a grid electrode of the third transistor is used as a control end of the output control module.
5. 5. The level shift circuit of claim 4, wherein the second transistor is a P-type transistor and the first and third transistors are N-type transistors when the first power supply terminal is low.
6. 6. The level shift circuit of claim 5, wherein the reference power supply terminal is configured with a reference voltage of 0V or less than 0V with the first power supply terminal being low.
7. 7. The level shift circuit of claim 4, wherein the first transistor and the third transistor are P-type transistors and the second transistor is an N-type transistor when the first power supply terminal is high.
8. 8. The level shift circuit of claim 7, wherein the reference power supply terminal is configured with a reference voltage of 0V or greater than 0V with the first power supply terminal being high.
9. 9. The level shifter circuit of any one of claims 1-8, further comprising a coupling module electrically connected between the driver chip and a control terminal of the first output module.
10. 10. The level shifter circuit of claim 9, the coupling module comprising a first capacitor having a first pole electrically connected to the driver chip and a second pole electrically connected to the first output module.
11. 11. A driving method of a level shift circuit, applied to the level shift circuit according to any one of claims 1 to 10, comprising: The method comprises the steps of performing reverse phase processing on an original driving signal by using a driving chip to obtain a first driving signal and outputting the first driving signal; The level conversion circuit is controlled to convert the first driving signal into a second driving signal so as to drive the gate driving circuit.
12. 12. A display panel, comprising: A gate driving circuit; and a level shift circuit according to any one of claims 1 to 10, for outputting a second drive signal for driving the gate drive circuit.
13. 13. The display panel according to claim 12, wherein the driving chip is configured to output N first driving signals, timings of the N first driving signals are different, the display panel includes N level shift circuits, the N level shift circuits are in one-to-one correspondence with the N first driving signals, and the N is an integer greater than or equal to 2.
14. 14. A circuit board for driving a display panel, the display panel comprising a gate driving circuit; the circuit board comprising a level shifter circuit as claimed in any one of claims 1 to 10.
15. 15. The circuit board of claim 14, comprising a printed circuit board or a flexible circuit board.
16. 16. The circuit board of claim 14, the transistors of the level shifter circuit comprising an N-type metal oxide semiconductor field effect transistor and a P-type metal oxide semiconductor field effect transistor.
17. 17. A display device, comprising: A display panel including a gate driving circuit; The driving chip is used for providing a first driving signal; And a level shift circuit according to any one of claims 1 to 10, the level shift circuit being configured to convert the first drive signal into a second drive signal, the second drive signal being configured to drive the gate drive circuit.
18. 18. The display device according to claim 17, wherein the level shift circuit is provided to the display panel.
19. 19. The display device according to claim 18, wherein the level conversion circuit is provided to a circuit board in a case where the display device further includes the circuit board.
20. 20. The display device of claim 19, the second power terminal being provided by the drive chip, the second power terminal further being electrically connected to the gate drive circuit.

Description

Level conversion circuit, driving method, display panel, circuit board and display device Technical Field The application belongs to the technical field of display, and particularly relates to a level conversion circuit, a driving method, a display panel, a circuit board and a display device. Background Organic LIGHT EMITTING (OLED) and flat display devices based on light emitting Diode (LIGHT EMITTING) technology have been widely used in various consumer electronic products such as mobile phones, televisions, notebook computers, and desktop computers, because of their advantages such as high image quality, power saving, thin body, and wide application range. However, the display performance of the current OLED display product needs to be improved. Disclosure of Invention The embodiment of the application provides a level conversion circuit, a driving method, a display panel, a circuit board and a display device, wherein the level conversion circuit is introduced to increase the difference between the high level and the low level of a driving signal output by a display driving chip, so that the effective utilization of the existing display driving chip is realized, and the waste of resources can be reduced while the requirement of larger cross voltage is met. In a first aspect, an embodiment of the present application provides a level shift circuit, where the level shift circuit is electrically connected between a driving chip and a gate driving circuit, and is configured to convert a first driving signal of the driving chip into a second driving signal, where the second driving signal is used for driving the gate driving circuit, a difference between a high level and a low level of the first driving signal is a first difference, a difference between a high level and a low level of the second driving signal is a second difference, and the second difference is greater than the first difference. In a possible embodiment of the first aspect, the high potential of the second drive signal corresponds to the low potential of the first drive signal at the same time, or the low potential of the second drive signal corresponds to the high potential of the first drive signal at the same time. In a possible embodiment of the first aspect, the high level of the second drive signal is equal to the high level of the first drive signal, and the low level of the second drive signal is less than the low level of the first drive signal; or the high level of the second driving signal is larger than the high level of the first driving signal, and the low level of the second driving signal is equal to the low level of the first driving signal. In a possible embodiment of the first aspect, the level shifting circuit comprises: The first end of the first output module is electrically connected with the first power supply end, and the second end of the first output module is electrically connected with the grid driving circuit; the first end of the second output module is electrically connected with the second power supply end, the second end of the second output module is electrically connected with the grid driving circuit, and the control end of the second output module is connected with a first driving signal; The first end of the output control module is electrically connected with the reference power supply end, the second end of the output control module is electrically connected with the control end of the first output module, and the control end of the output control module is connected with a first driving signal; under the control of the output control module and the first driving signal, the first output module and the second output module are alternately conducted; One of the first power supply end and the second power supply end is in a high level, the other is in a low level, the low level of the first power supply end is smaller than the low level of the first driving signal under the condition that the first power supply end is in a low level, and the high level of the first power supply end is larger than the high level of the first driving signal under the condition that the first power supply end is in a high level. In a possible embodiment of the first aspect, the high level of the second power supply terminal is equal to the high level of the first driving signal in case the first power supply terminal is low, and the low level of the second power supply terminal is equal to the low level of the first driving signal in case the first power supply terminal is high. In a possible embodiment of the first aspect, the first output module comprises a first transistor, a first pole of the first transistor being a first terminal of the first output module, a second pole of the first transistor being a second terminal of the first output module, a gate of the first transistor being a control terminal of the first output module; the second output module comprises a second transistor, a first electrode of the second tra