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CN-122024664-A - Driving method and driving device of display panel and display device

CN122024664ACN 122024664 ACN122024664 ACN 122024664ACN-122024664-A

Abstract

The application discloses a driving method, a driving device and a display device of a display panel, wherein the driving method of the display panel comprises the steps of responding to the change of a refresh rate and acquiring current refresh rate information; the method comprises the steps of obtaining target clock control information matched with current refresh rate information according to preset information, responding according to the target clock control information to adjust the position of an edge of an initial clock signal to obtain a target clock signal, wherein the initial clock signal is a clock signal corresponding to the refresh rate before change, the position of the edge corresponds to the opening time of a grid electrode of a TFT in a display panel, and driving the display panel according to the target clock signal. The application can move backward when the refresh rate is reduced, so as to prolong the opening time of the grid electrode of the TFT in the display panel, thereby prolonging the charging time of the pixel corresponding to the TFT to improve the initial value of the liquid crystal voltage and ensuring that the liquid crystal voltage of the display panel after the pixel is lightened when the refresh rate is reduced can be better maintained.

Inventors

  • LU YAN
  • SHI JING

Assignees

  • 昆山龙腾光电股份有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (10)

  1. 1. A driving method of a display panel, comprising: Responding to the refresh rate change, and acquiring current refresh rate information; Acquiring target clock control information matched with the current refresh rate information according to preset information; responding according to the target clock control information to adjust the position of an edge of an initial clock signal to obtain a target clock signal, wherein the initial clock signal is a clock signal corresponding to the initial clock signal before the change of the refresh rate, and the position of the edge corresponds to the opening time of a grid electrode of a TFT in the display panel; And driving the display panel according to the target clock signal.
  2. 2. The method for driving a display panel according to claim 1, wherein, The edges being either falling or rising edges, and/or, The edges of the target clock signal correspond to the flip phases of the output enable signal.
  3. 3. The driving method of a display panel according to claim 1, wherein responding according to the target clock control information to adjust an edge position of an initial clock signal to obtain a target clock signal, comprises: responding according to the target clock control information when the refresh rate is increased corresponding to the refresh rate change to obtain the target clock signal by shifting the position of the edge of the initial clock signal forward, or And when the refresh rate is reduced corresponding to the change of the refresh rate, responding according to the target clock control information, and shifting the position of the edge of the initial clock signal to obtain the target clock signal.
  4. 4. A driving method of a display panel according to claim 1 or 3, wherein the pre-configuration information includes a correspondence relationship between refresh rate information and a register value, and the target clock control information is a target register value; responding according to the target clock control signal, comprising: selecting a target register from the configured plurality of registers according to the target register value; and reading parameters in the target register to perform clock signal generation processing to generate the target clock signal.
  5. 5. The method of driving a display panel according to claim 1, comprising, before the step of acquiring the current refresh rate in response to the refresh rate change: And starting a refresh rate self-adaptive synchronization function.
  6. 6. The method for driving a display panel according to claim 1, wherein the obtaining manner of the current refresh rate information includes: directly acquiring the current refresh rate as the current refresh rate information, or, Detecting the current frequency of a frame start signal, and taking the current frequency as the current refresh rate information.
  7. 7. The method of driving a display panel according to claim 1, wherein the method of determining the change in the refresh rate comprises: Comparing the refresh rate of the nearest displayed frame picture with the refresh rate corresponding to the frame picture to be displayed; And when the refresh rate of the displayed frame picture is different from the refresh rate corresponding to the frame picture to be displayed, judging that the refresh rate is changed.
  8. 8. A driving device of a display panel, characterized by comprising a memory storing at least one program instruction and a processor implementing the driving method of the display panel according to any one of claims 1 to 7 by loading and executing the at least one program instruction.
  9. 9. The driving device of a display panel according to claim 8, wherein the driving device is a timing controller.
  10. 10. A display device comprising a display panel and a driving device according to any one of claims 8 to 9.

Description

Driving method and driving device of display panel and display device Technical Field The present application relates to the field of display technologies, and in particular, to a driving method of a display panel, a driving device of the display panel, and a display device. Background The Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) has the advantages of low radiation, small volume, low energy consumption and the like, and is widely used in electronic products such as notebook computers, intelligent flat televisions, intelligent mobile phones and the like. With the development of display technology, existing liquid crystal displays support a variety of refresh rates, which refer to the number of times a display screen is refreshed per second. Nowadays, due to the continuous development of the field of electronic competition, more and more game players have higher requirements on the display. In some implementations, the display panel of the liquid crystal display may be reduced from a high refresh rate to a low refresh rate by increasing the length of the vertical trailing edge (or V back porch) in the frame structure, thereby extending the time of the blanking region (or blank region) of the frame structure. Therefore, the charge time of the pixels is the same regardless of the refresh rate of the display panel. However, when the refresh rate of the display panel is low, the pixels need to be turned on for a long time, and the conventional internal circuit design of the display panel can cause the liquid crystal voltage of the pixels to be unable to be maintained for a long time (the liquid crystal voltage is partially lost), which eventually results in the overall brightness of the display panel to be reduced, thereby affecting the display effect. Therefore, how to solve the foregoing drawbacks is a technical problem that needs to be solved by those skilled in the art. Disclosure of Invention The application aims to provide a driving method of a display panel, a driving device of the display panel and a display device, which solve the problem that when the refresh rate of the display panel is reduced, the whole brightness of the display panel is reduced and the display effect is affected due to the loss of a liquid crystal voltage part after pixel lighting. To achieve the above object: In a first aspect, an embodiment of the present application provides a driving method of a display panel, including obtaining current refresh rate information in response to a refresh rate change, obtaining target clock control information matched with the current refresh rate information according to preset information, responding according to the target clock control information to adjust a position of an edge of an initial clock signal to obtain a target clock signal, where the initial clock signal is a clock signal corresponding to the refresh rate before the refresh rate change, the position of the edge corresponds to an on time of a gate of a TFT in the display panel, and driving the display panel according to the target clock signal. Optionally, the edge is a falling edge or a rising edge. Optionally, an edge of the target clock signal corresponds to a flip phase of the output enable signal. Optionally, responding according to the target clock control information to adjust the edge position of the initial clock signal to obtain the target clock signal, wherein responding according to the target clock control information to move forward the edge position of the initial clock signal to obtain the target clock signal when the refresh rate corresponding to the change of the refresh rate increases, or responding according to the target clock control information to move backward the edge position of the initial clock signal to obtain the target clock signal when the refresh rate corresponding to the change of the refresh rate decreases. Optionally, the pre-configuration information includes a correspondence between refresh rate information and a register value, and the target clock control information is a target register value. Optionally, responding according to the target clock control signal comprises selecting a target register from the configured plurality of registers according to the target register value, reading parameters in the target register to perform clock signal generation processing, and generating a target clock signal. Optionally, before the step of obtaining the current refresh rate in response to the refresh rate change, a refresh rate adaptive synchronization function is turned on. Optionally, the method for acquiring the current refresh rate information includes: the current refresh rate is directly obtained as current refresh rate information, or, Detecting the current frequency of the frame start signal, and taking the current frequency as the current refresh rate information. Optionally, the method for judging the change of the refresh rate comprises the steps of comparing the refresh ra