Display panel control method and device and display equipment

Abstract

The invention discloses a control method and device of a display panel and display equipment, and the method comprises the steps: carrying out the scanning of a next frame of image according to an image refreshing frequency corresponding to a first frequency switching instruction when the first frequency switching instruction is received; the first frequency switching instruction is used for switching the image refreshing frequency from high frequency to low frequency; wherein the voltage of a compensation voltage signal provided for a driving tube in the pixel circuit is kept at a first compensation voltage value during the first holding frame duration after frequency switching; the first compensation voltage value is greater than the second compensation voltage value, and the second compensation voltage value is the compensation voltage value of other holding frames except the first holding frame after frequency switching of the compensation voltage signal. By adopting the scheme, the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit is increased, so that the display brightness of the driving tube in the pixel circuit during the first frame keeping duration after frequency switching can be improved, the brightness change caused by the state change of the driving tube when the high frequency is switched to the low frequency is avoided, and the display quality of the pixel circuit is improved. And straight cutting and no flicker are realized.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a control method and device for a display panel, and a display device. Background Art

[0002] With the continuous development of display technology, more and more high refresh rate displays have emerged. In order to meet the needs of different users, most high refresh rate displays begin to support dynamic frequency conversion.

[0003] In the display device, the application processor sends a frequency switching instruction to the display chip and provides image data, so that the display chip adjusts the refresh frequency according to the frequency switching instruction to perform image scanning.

[0004] However, currently, display panels may have a problem of poor display effects when switching frequencies. Summary of the invention

[0005] The technical problem solved by the present invention is how to improve the display effect of the display panel.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a control method for a display panel, including: when a first frequency cutting instruction is received, the next frame of image scanning is performed according to the image refresh frequency corresponding to the first frequency cutting instruction; the first frequency cutting instruction is used to switch the image refresh frequency from high frequency to low frequency; wherein, during the first holding frame after the frequency cutting, the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit is maintained at the first compensation voltage value; the first compensation voltage value is greater than the second compensation voltage value, and the second compensation voltage value is the compensation voltage value of the compensation voltage signal in other holding frames except the first holding frame after the frequency cutting.

[0007] Optionally, the first compensation voltage value ranges from 7V to 8V.

[0008] Optionally, after the frequency cutting, the second compensation voltage values ​​of the compensation voltage signal in the remaining frames except the first holding frame are the same.

[0009] Optionally, the second compensation voltage value ranges from 6.95V to 7.95V.

[0010] Optionally, the control method of the display panel also includes: when a second frequency cutting instruction is received, maintaining the current image refresh frequency and continuing to scan the current frame image until the scanning time of the current frame image reaches a preset time, and the preset time is an integer multiple of the anode reset signal period; the second frequency cutting instruction is used to switch the image refresh frequency from low frequency to high frequency.

[0011] Optionally, maintaining the current image refresh frequency and continuing to scan the current frame image includes: maintaining the current voltage of the tearing signal unchanged.

[0012] Optionally, the preset duration is equal to the anode reset signal period.

[0013] Optionally, the preset duration is equal to twice the period of the anode reset signal.

[0014] Correspondingly, an embodiment of the present invention also provides a control device for a display panel, comprising: a frequency cutting scanning unit, adapted to, when receiving a first frequency cutting instruction, perform a next frame image scan according to the image refresh frequency corresponding to the first frequency cutting instruction; the first frequency cutting instruction is used to switch the image refresh frequency from high frequency to low frequency; a compensation voltage setting unit, adapted to maintain the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit at a first compensation voltage value during the first holding frame after the frequency cutting; the first compensation voltage value is greater than the second compensation voltage value, and the second compensation voltage value is the compensation voltage value of the compensation voltage signal in other holding frames except the first holding frame after the frequency cutting.

[0015] Correspondingly, an embodiment of the present invention further provides a display device, comprising: a pixel circuit, an application processor, and the control device of the display panel as described above.

[0016] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0017] By adopting the control method in the embodiment of the present invention, during the first holding frame after frequency cutting, the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit is maintained at a first compensation voltage value, and the first compensation voltage value is greater than the second compensation voltage value of other holding frames except the first holding frame after frequency cutting, thereby achieving the increase of the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit, thereby improving the display brightness of the driving tube in the pixel circuit during the first holding frame after frequency cutting, avoiding the brightness change caused by the state change of the driving tube when switching from high frequency to low frequency, and achieving direct switching without flicker.

[0018] Furthermore, since the driving tube in the pixel circuit is in a stable state in the frames other than the first holding frame after frequency cutting, the second compensation voltage values ​​of the compensation voltage signal in the present invention are the same in the frames other than the first holding frame after frequency cutting, thereby achieving that the driving tube in the pixel circuit can maintain a stable brightness output without brightness attenuation or flickering.

[0019] Furthermore, when the present invention receives the second frequency cutting instruction, it maintains the image refresh frequency corresponding to the current image refresh frequency and continues to scan the current frame image until the scanning time of the current frame image reaches a preset time, and the preset time is an integer multiple of the anode reset signal period. Compared with the prior art that immediately executes the frequency cutting after executing the first frequency cutting instruction, resulting in a change in the anode reset signal period, the present invention can keep the period of the anode reset signal unchanged before and after receiving the second frequency cutting instruction, thereby achieving the stability of the brightness of the display panel when switching the refresh frequency, and no jump occurs, thereby improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of a pixel circuit in a display panel;

[0021] Figure 2 It is a timing diagram of some signals of the pixel circuit in a display panel;

[0022] Figure 3 It is a timing diagram of some signals of a pixel circuit in a display panel in an embodiment of the present invention;

[0023] Figure 4 is another timing diagram of some signals of a pixel circuit in a display panel in an embodiment of the present invention;

[0024] Figure 5 is a timing diagram of part of the signals of a pixel circuit in another display panel in an embodiment of the present invention;

[0025] Figure 6 is a schematic structural diagram of a control device for a display panel in one embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of a display device in one embodiment of the present invention. DETAILED DESCRIPTION

[0027] The current display panel may experience brightness jumps when switching frequencies, which in turn leads to poor display effects of the display panel.

[0028] Figure 1 It is a schematic diagram of the structure of a pixel circuit in a display panel. Figure 2 It is a timing diagram of some signals in the pixel circuit of a display panel. Figure 1 As shown, Figure 1The pixel circuit includes a driving tube T3, a reset tube T5, a compensation tube T8, a storage capacitor Cst and a light-emitting diode D1, one end of the driving tube T3 is connected to the compensation tube T8, the gate of the driving tube T3 is connected to the reset tube T5 and the storage capacitor Cst, and the other end of the driving tube T3 is connected to the anode of the light-emitting diode D1.

[0029] In some embodiments, the pixel circuit further includes: a reset signal terminal connected to the gate of the reset tube T5, a first reference voltage terminal connected to one end of the reset tube T5, a write signal terminal connected to the gate of the compensation tube T8, and a compensation signal terminal connected to the other end of the compensation tube T8.

[0030] Specifically, a reset signal SN1 is applied to the gate of the reset tube T5, so that the reset tube T5 is turned on. The turned-on reset tube T5 connects the storage capacitor Cst to the power supply voltage or ground, so that the storage capacitor Cst is charged or discharged to a predetermined initial voltage value. When the storage capacitor Cst reaches the target voltage value, the reset signal SN1 is converted to a low level, the reset tube T5 is turned off, and the storage capacitor Cst is maintained at the voltage value, that is, the gate of the driving tube T3 is reset to the initial voltage value.

[0031] exist Figure 1 Based on the combination Figure 2 It can be seen that at t 1 When receiving the frequency switching instruction, the display panel switches the refresh frequency from 120HZ to 30HZ. 1 Time to t 2 The time is the duration of the first refresh frame I after frequency switching, t 2 Time to t 3 The time is the duration of the first hold frame II after the frequency cut. 1 Time to t 2 At this moment, the reset signal SN1 is still in the reset period, but at t 2 Time to t 3 At this moment, the reset signal SN1 is at a low level. At this time, the reset tube T5 stops resetting the gate voltage of the driving tube T3, causing charge accumulation on the gate of the driving tube T3, thereby causing the gate-source voltage VGS of the driving tube T3 to fluctuate, affecting the display effect of the display panel.

[0032] At present, in order to solve the above problems, usually in t 2 Time to t 3At the moment (i.e., during the first holding frame II after the frequency cutting), the voltage of the compensation voltage signal DVH applied to one end of the compensation tube T8 is set to the second compensation voltage value DVHB to raise the VGS of the driving tube T3. However, setting the voltage of the compensation voltage signal DVH to the second compensation voltage value DVHB does not pull the VGS of the driving tube T3 back to the initial voltage value, which still causes the VGS of the driving tube T3 to fluctuate, thereby affecting the display effect of the display panel.

[0033] In view of the above problems, the present invention provides a control method for a display panel, by increasing the voltage value of a compensation voltage signal provided to a driving tube in a pixel circuit to a first compensation voltage value during the first holding frame II after frequency cutting, wherein the first compensation voltage value is greater than the second compensation voltage value of other holding frames II except the first holding frame II after frequency cutting, thereby improving the display brightness of the driving tube in the pixel circuit during the first holding frame II after frequency cutting, avoiding brightness changes caused by the state change of the driving tube when switching from high frequency to low frequency, and achieving direct switching without flicker.

[0034] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] An embodiment of the present invention provides a control method for a display panel, comprising: when a first frequency cutting instruction is received, scanning the next frame of image according to the image refresh frequency corresponding to the first frequency cutting instruction; wherein, during the first hold frame II after the frequency cutting, the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit is maintained at the first compensation voltage value.

[0036] It should be noted that the first compensation voltage value is greater than the second compensation voltage value, and the second compensation voltage value is the compensation voltage value of the compensation voltage signal in other frames II except the first frame II after frequency cutting.

[0037] In a specific embodiment, the first compensation voltage value DVHC ranges from 7V to 8V, and the second compensation voltage value DVHB ranges from 6.95V to 7.95V.

[0038] In a preferred embodiment, the first compensation voltage value DVHC is 7.5V, and the second compensation voltage value DVHB is 7.45V.

[0039] In some embodiments of the present invention, the first frequency switching instruction is used to switch the image refresh frequency from a high frequency to a low frequency.

[0040] In a specific embodiment, in combination Figure 1 as well as Figure 3 ,by Figure 3Taking the timing diagram of some signals in as an example, some signals before and after receiving the first frequency cutting instruction are described.

[0041] In some embodiments of the present invention, the first frequency cutting instruction is used to switch the image refresh frequency from 120 Hz to 30 Hz.

[0042] Among them, the reset signal SN1 is used to reset the gate of the driving tube T3 to the initial voltage; the write signal SP is used to control the opening or closing of the write tube T2 to transmit the data signal Vdata to the driving tube T3; the compensation voltage signal DVH is used to provide a compensation voltage for the driving tube T3.

[0043] refer to Figure 3 , at t 0 Time to t 1 At this moment, the image refresh frequency is 120HZ, that is, at t 0 Time to t 1 All moments are refresh frames I. At this time, a reset signal SN1 (high level) is applied to the gate of the reset tube T5, so that the reset tube T5 is turned on. The turned-on reset tube T5 connects the storage capacitor Cst to the power supply voltage or ground, so that the storage capacitor Cst is charged or discharged to a predetermined initial voltage value. When the storage capacitor Cst reaches the target voltage value, the reset signal is cancelled (low level), the reset tube T5 is turned off, and the storage capacitor Cst is maintained at the voltage value, that is, the gate of the driving tube T3 is reset to the initial voltage value; and at t 0 Time to t 1 At this moment, the voltage of the compensation voltage signal DVH provided to the driving tube in the pixel circuit is maintained at the third compensation voltage value DVHA.

[0044] Therein, a reset period is formed between the rising edges of adjacent reset signals SN1.

[0045] The third compensation voltage value DVHA is in the range of 6.9V to 7.9V.

[0046] In a preferred embodiment, the third compensation voltage value DVHA is 7.4V.

[0047] Specifically, when the reset signal SN1 is at a high level, the write signal SP is at a low level, that is, during the process of resetting the gate of the driving tube T3, the write tube T2 stops writing the data signal Vdata; when the reset signal is at a low level, the write signal SP is at a high level, that is, after the gate of the driving tube T3 is reset, the write tube T2 starts writing the data signal Vdata.

[0048] refer to Figure 3 , in t 1At this moment, the control device of the display panel receives the first frequency switching instruction and switches the refresh frequency of the display panel from 120 Hz to 30 Hz. 1 Time to t 2 The time is the duration of the first refresh frame I after frequency switching, and at t 1 Time to t 2 During the time, the reset signal SN1 is still in the reset period; t 2 Time to t 3 The time is the duration of the first hold frame II after frequency switching. 2 Time to t 3 At this moment, the reset signal SN1 is at a low level, and the reset tube T5 stops driving the gate voltage of the tube T3 to reset.

[0049] At the same time, at t 1 Time to t 2 At time t, the voltage of the compensation voltage signal DVH provided to the driving tube in the pixel circuit is maintained at the third compensation voltage value DVHA; at time t 2 Time to t 3 At this moment, the voltage of the compensation voltage signal DVH provided to the driving tube in the pixel circuit is maintained at the first compensation voltage value DVHC.

[0050] Among them, at t 1 Time to t 3 In the moment, the refresh frame I duration is the time when the tear signal TE is continuously at a low level, and the hold frame II duration is the time when the tear signal TE is continuously at a high level.

[0051] Specifically, by 2 Time to t 3 At the first moment (i.e., the first holding frame II after frequency cutting), the first compensation voltage value DVHC is applied to the input end of the compensation tube T8 to raise the VGS of the driving tube T3, so as to pull the VGS of the driving tube T3 back to the initial voltage value, maintain the stability of the VGS of the driving tube T3, and improve the display effect of the display panel.

[0052] It can be seen from the above content that by adopting the control method in the embodiment of the present invention, during the first holding frame II after frequency cutting, the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit is maintained at the first compensation voltage value, and the first compensation voltage value is greater than the second compensation voltage value of other holding frames II except the first holding frame II after frequency cutting, thereby achieving the increase of the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit, thereby improving the display brightness of the driving tube in the pixel circuit during the first holding frame II after frequency cutting, avoiding the brightness change caused by the state change of the driving tube when switching from high frequency to low frequency, and achieving direct cutting without flicker.

[0053] refer to Figure 3 , t 3 Time to t 4 At this moment, the image refresh frequency is 30HZ, that is, at t 3 Time to t 4 The moment is refresh frame I. At this time, the reset signal is still in the reset cycle, the reset tube T5 starts to drive the gate voltage of the tube T3 to reset, and the voltage of the compensation voltage signal DVH provided to the driving tube T3 in the pixel circuit is maintained at the third compensation voltage value DVHA; 4 Time to t 5 At the time of holding frame II, the reset tube T5 stops the gate voltage of the driving tube T3 to reset, and the voltage of the compensation voltage signal DVH provided to the driving tube T3 in the pixel circuit is maintained at the second compensation voltage value DVHB.

[0054] Specifically, due to t 4 Time to t 5 The moment is the second holding frame II after the frequency cutting. At this time, the driving tube T3 is in a stable state and does not require a higher compensation voltage value. Therefore, the present invention is 4 Time to t 5 The compensation voltage value is reduced to the second compensation voltage value DVHB at a certain moment.

[0055] In some embodiments of the present invention, after the frequency cutting, the second compensation voltage values ​​DVHB of the compensation voltage signal in the remaining frames II except the first frame II are the same.

[0056] It should be noted that the embodiment of the present invention only describes the second compensation voltage value of the second holding frame II after the frequency cut. Since the second compensation voltage values ​​of the compensation voltage signal in other holding frames except the first holding frame after the frequency cut are the same, the second compensation voltage values ​​of other holding frames after other frequency cuts are no longer described here.

[0057] In the above scheme, since the driving tube in the pixel circuit is stable in the state of other frames II except the first frame II after frequency cutting, the second compensation voltage values ​​of the compensation voltage signal in the present invention are the same in other frames except the first frame II after frequency cutting, so that the driving tube in the pixel circuit can maintain a stable brightness output without brightness attenuation or flickering.

[0058] In another embodiment of the present invention, the control method of the display panel also includes: when receiving a second frequency cutting instruction, maintaining the current image refresh frequency to continue scanning the current frame image until the scanning time of the current frame image reaches a preset time, and the preset time is an integer multiple of the anode reset signal period.

[0059] The second frequency switching instruction is used to switch the image refresh frequency from a low frequency to a high frequency.

[0060] In some embodiments, the first screen switching and frequency switching instruction is executed first, and then the second screen switching and frequency switching instruction is executed. Specifically, the current frame image is first scanned by a high-frequency refresh frequency. After receiving the first screen switching and frequency switching instruction, the current frame image is switched to a low-frequency refresh frequency to scan. After the current frame image is continuously scanned at the low-frequency refresh frequency for a period of time, after receiving the second screen switching and frequency switching instruction, the current frame image is switched to a high-frequency refresh frequency to scan.

[0061] In some other embodiments, the second screen switching and frequency switching instruction is executed first, and then the first screen switching and frequency switching instruction is executed. Specifically, the current frame image is first scanned by a low refresh frequency, and after receiving the second screen switching and frequency switching instruction, the current frame image is switched to a high refresh frequency to scan. After continuously scanning the current frame image at the high refresh frequency for a period of time, after receiving the first screen switching and frequency switching instruction, the current frame image is switched to a low refresh frequency to scan.

[0062] In a specific embodiment, in combination Figure 1 , Figure 4 as well as Figure 5 ,by Figure 4 or Figure 5 Taking the timing diagram of some signals in as an example, some signals before and after receiving the second frequency cutting instruction are described.

[0063] The second frequency cutting instruction is used to switch the image refresh frequency from 60 Hz to 120 Hz.

[0064] Specifically, Figure 1 The pixel circuit further includes: an anode reset tube T7, and an output end of the anode reset tube T7 is connected to the anode of the light emitting diode D1.

[0065] In some embodiments, the pixel circuit further includes: an anode reset signal terminal connected to one end of the anode reset tube T7.

[0066] The anode reset signal SP* is used to reset the anode voltage of the light emitting diode to an initial state.

[0067] refer to Figure 4 In some embodiments of the present invention, the preset duration is equal to the anode reset signal period.

[0068] Specifically, at t 0 Time to t 1 At this moment, the image refresh frequency is 60HZ, and the frequency of the anode reset signal is 120HZ; at t 2At the moment, the second frequency cutting instruction is received, and the refresh frequency of 60HZ is switched to the refresh frequency of 120HZ. At this time, the tearing signal TE maintains the current voltage unchanged, and then maintains the current image refresh frequency to continue scanning the current frame image until the scanning time of the current frame image reaches the scanning time of the refresh frequency of 120HZ. At this time, the anode reset signal SP* is at t 2 Time to t 3 The anode reset signal is synchronized with the tearing signal TE at the time, so that the period of the anode reset signal before and after receiving the second frequency cutting instruction remains unchanged; at t 3 Time to t 4 At the moment, the refresh frequency of the tear signal TE is switched to 120 Hz, and the current frame image scanning is continued with the refresh frequency of 120 Hz. The anode reset signal SP* is switched to 120 Hz at the moment. 3 Time to t 4 The time is synchronized with the tearing signal TE.

[0069] In a specific embodiment, the anode reset signal SP* is 2 Time to t 3 Synchronizing with the tear signal TE within a certain time period includes: when the tear signal TE is kept at a low level, the anode reset signal SP* is kept at a high level.

[0070] refer to Figure 5 In some other embodiments of the present invention, the preset duration is equal to twice the period of the anode reset signal SP*.

[0071] Specifically, at t 0 Time to t 1 At this moment, the image refresh frequency is 60HZ, and the frequency of the anode reset signal is 120HZ; at t 2 At the moment, the second frequency cutting instruction is received, and the refresh frequency of 60HZ is switched to the refresh frequency of 120HZ. At this time, the tearing signal TE maintains the current voltage unchanged, and then maintains the current image refresh frequency to continue scanning the current frame image until the scanning time of the current frame image reaches the scanning time of the refresh frequency of 60HZ. At this time, the anode reset signal SP* is at t 2 Time to t 3 The anode reset signal is synchronized with the tearing signal TE at the time, so that the period of the anode reset signal before and after receiving the second frequency cutting instruction remains unchanged; at t 4 After t, the refresh frequency of the tear signal TE is switched to 120 Hz, and the current frame image scanning is continued with the refresh frequency of 120 Hz. The anode reset signal SP* is 4 After the time, it is synchronized with the tearing signal TE.

[0072] In a specific embodiment, the anode reset signal SP* is 2 Time to t 3 Synchronizing with the tear signal TE within a certain time period includes: when the tear signal TE is kept at a low level, the anode reset signal SP* is kept at a high level.

[0073] In other embodiments of the present invention, the preset duration is an integer multiple of the anode reset signal period, such as three times or four times.

[0074] From the above content, it can be seen that when the present invention receives the second frequency cutting instruction, it maintains the image refresh frequency corresponding to the current image refresh frequency and continues to scan the current frame image until the scanning time of the current frame image reaches the preset time, and the preset time is an integer multiple of the anode reset signal period. Compared with the prior art that immediately executes the frequency cutting after executing the first frequency cutting instruction, resulting in a change in the anode reset signal period, the present invention can make the period of the anode reset signal before and after receiving the second frequency cutting instruction remain unchanged, thereby achieving the stability of the brightness of the display panel when switching the refresh frequency, and no jump occurs, thereby improving the display effect of the display panel.

[0075] Reference Figure 6 The embodiment of the present invention further provides a control device 10 for a display panel, the device may include: a frequency cutting scanning unit 11 and a compensation voltage setting unit 12, wherein:

[0076] The frequency cutting scanning unit 11 is adapted to perform the next frame image scanning according to the image refresh frequency corresponding to the first frequency cutting instruction when receiving the first frequency cutting instruction; the first frequency cutting instruction is used to switch the image refresh frequency from high frequency to low frequency;

[0077] The compensation voltage setting unit 12 is suitable for maintaining the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit at a first compensation voltage value during the first holding frame after frequency cutting; the first compensation voltage value is greater than the second compensation voltage value, and the second compensation voltage value is the compensation voltage value of the compensation voltage signal in other holding frames except the first holding frame after frequency cutting.

[0078] Reference Figure 7 The embodiment of the present invention further provides a display device 20, including: a pixel circuit 23, an application processor 21 and a control device 22 for a display panel.

[0079] In some embodiments of the present invention, the working principle of the display device 20 includes: the application processor 21 outputs the image to be scanned and the frequency cutting instruction to the control device 22 of the display panel, the control device 22 of the display panel acquires and scans the image to be scanned, generates a tearing signal and a plurality of pixel circuit signals corresponding to the refresh frequency in the image to be scanned; outputs the tearing signal to the application processor 21, and subsequently the application processor 21 transmits the image to be scanned to the control device of the display panel according to the rising edge of the tearing signal; outputs a plurality of pixel circuit signals to the pixel circuit 23, so as to display the image to be scanned through the pixel circuit 23.

[0080] The display device 20 may be any device with a display function, such as a mobile phone, a tablet computer, a laptop computer, an e-reader, a television, a smart watch, or the like.

[0081] In the embodiment of the present invention, the display device 20 is a mobile phone.

[0082] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A method for controlling a display panel, characterized in that: include: When receiving the first frequency cutting instruction, scanning the next frame of image according to the image refresh frequency corresponding to the first frequency cutting instruction; The first frequency switching instruction is used to switch the image refresh frequency from high frequency to low frequency; Among them, during the first holding frame after frequency cutting, the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit is maintained at a first compensation voltage value; the first compensation voltage value is greater than the second compensation voltage value, and the second compensation voltage value is the compensation voltage value of the compensation voltage signal in other holding frames except the first holding frame after frequency cutting.

2. The control method of the display panel according to claim 1, characterized in that: The first compensation voltage value ranges from 7V to 8V.

3. The control method of the display panel according to claim 1, characterized in that: After the frequency cutting, the second compensation voltage values ​​of the compensation voltage signal in the remaining frames except the first holding frame are the same.

4. The control method of the display panel according to claim 3, characterized in that: The second compensation voltage value ranges from 6.95V to 7.95V.

5. The control method of a display panel according to any one of claims 1 to 4, characterized in that: Also includes: When receiving the second frequency cutting instruction, the current image refresh frequency is maintained to continue scanning the current frame image until the scanning time of the current frame image reaches a preset time, and the preset time is an integer multiple of the anode reset signal period; The second frequency switching instruction is used to switch the image refresh frequency from a low frequency to a high frequency.

6. The control method of the display panel according to claim 5, characterized in that: The maintaining the current image refresh frequency and continuing the current frame image scanning includes: maintaining the current voltage of the tearing signal unchanged.

7. The control method of the display panel according to claim 6, characterized in that: The preset duration is equal to the anode reset signal period.

8. The control method of the display panel according to claim 6, characterized in that: The preset duration is equal to twice the cycle of the anode reset signal.

9. A control device for a display panel, characterized in that: include: a frequency cutting scanning unit adapted to scan a next frame of image according to an image refresh frequency corresponding to the first frequency cutting instruction when receiving the first frequency cutting instruction; The first frequency switching instruction is used to switch the image refresh frequency from high frequency to low frequency; The compensation voltage setting unit is suitable for maintaining the voltage of the compensation voltage signal provided to the driving tube in the pixel circuit at a first compensation voltage value during the first holding frame after frequency cutting; the first compensation voltage value is greater than the second compensation voltage value, and the second compensation voltage value is the compensation voltage value of the compensation voltage signal in other holding frames except the first holding frame after frequency cutting.

10. A display device, characterized in that: include: A pixel circuit, an application processor, and a control device for a display panel as claimed in any one of claims 1 to 9.

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