Display panel, display device and brightness adjustment method of display panel

Abstract

The application discloses a display panel, a display device and a brightness adjusting method of the display panel, and belongs to the technical field of display panels. The display panel comprises a brightness adjusting circuit, and the circuit comprises: a gate-on unit configured to provide a gate driving signal of a gate driving end to an adjusting unit in a refresh area scanning stage; the adjusting unit is configured to provide the gate driving signal to a driving output end in the refresh area scanning stage, so as to drive the refresh area to refresh display; in a holding area scanning stage, a first potential signal of an enable signal end is provided to the driving output end, so as to adjust the display brightness of the holding area to be consistent with the display brightness of the refresh area; and the first potential signal is adjusted according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area. The application can avoid the problem of brightness difference between the refresh area and the holding area caused by different refresh rates, and improve the display effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display panels, and particularly relates to a display panel, a display device, and a brightness adjustment method of a display panel. BACKGROUND

[0002] In order to save display power consumption, a display area of a display panel is divided into multiple regions, different regions are provided with different refresh rates, so as to realize refresh region update and non-refresh region maintenance. However, different refresh rates of different regions result in brightness difference of different regions, which affects display effect. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a display panel, a display device, and a brightness adjustment method of a display panel, which can avoid the brightness difference problem of refresh regions and maintenance regions caused by different refresh rates, and improve display effect.

[0004] In a first aspect, the present application provides a display panel, the display panel comprising a refresh region and a maintenance region, the display panel comprising a brightness adjustment circuit, the brightness adjustment circuit comprising a gating unit, an adjustment unit, a gate driving end, an enable signal end, and a driving output end;

[0005] The gating unit is connected with the gate driving end and the adjustment unit respectively, for providing a gate driving signal of the gate driving end to the adjustment unit in a refresh region scanning stage; and stopping providing the gate driving signal of the gate driving end to the adjustment unit in a maintenance region scanning stage.

[0006] The adjustment unit is connected with the enable signal end and the driving output end respectively, for providing the gate driving signal to the driving output end in the refresh region scanning stage, so as to drive the refresh region to perform refresh display; and providing a first potential signal of the enable signal end to the driving output end in the maintenance region scanning stage, so as to adjust the display brightness of the maintenance region to be consistent with the display brightness of the refresh region; the first potential signal is adjusted according to a difference between the display brightness of the maintenance region before adjustment and the display brightness of the refresh region.

[0007] According to the display panel provided in the application, the gate drive signal is provided to the refresh area in the refresh area scanning stage, so as not to affect the display brightness of the refresh area, the gate drive signal is stopped from being provided to the holding area in the holding area scanning stage, and the first potential signal is provided to the holding area, and the first potential signal is adjusted according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area, so that the first potential signal adjusts the display brightness of the holding area to be consistent with the display brightness of the refresh area, thereby avoiding the problem of brightness difference between the refresh area and the holding area caused by different refresh rates, and improving the display effect.

[0008] According to an embodiment of the application, the gating unit is further connected with the enable signal end, and is further used for turning on based on the second potential signal of the enable signal end to provide the gate drive signal of the gate drive end to the adjusting unit in the refresh area scanning stage; and turning off based on the first potential signal of the enable signal end to stop providing the gate drive signal of the gate drive end to the adjusting unit in the holding area scanning stage.

[0009] According to an embodiment of the application, the adjusting unit comprises a first adjusting subunit and a second adjusting subunit.

[0010] The first adjusting subunit is connected with the enable signal end and the drive output end respectively, and is used for turning on based on the first potential signal of the enable signal end to provide the first potential signal of the enable signal end to the drive output end in the holding area scanning stage.

[0011] The second adjusting subunit is connected with the enable signal end, the drive output end and the gating unit respectively, and is used for turning on based on the second potential signal of the enable signal end to provide the gate drive signal to the drive output end in the refresh area scanning stage.

[0012] According to an embodiment of the application, the first adjusting subunit comprises a first transistor and a second transistor.

[0013] The control end and the input end of the first transistor are connected with the enable signal end respectively, the output end of the first transistor is connected with the input end of the second transistor, the control end of the second transistor is connected with the enable signal end, and the output end of the second transistor is connected with the drive output end.

[0014] According to an embodiment of the application, the second adjusting subunit comprises a third transistor.

[0015] The control end of the third transistor is connected with the enable signal end, the input end of the third transistor is connected with the gating unit, and the output end of the third transistor is connected with the drive output end.

[0016] According to one embodiment of the present application, the display panel further comprises a pixel circuit, the pixel circuit comprising a light emitting element;

[0017] The pixel circuit is connected with the driving output end, and is configured to drive the light emitting element to emit light according to the gate driving signal of the driving output end in a refresh stage, and adjust the light emitting brightness of the light emitting element according to the first potential signal of the driving output end in a holding stage.

[0018] According to one embodiment of the present application, the display panel further comprises a plurality of the brightness adjustment circuits and a plurality of rows of the pixel circuits;

[0019] The plurality of rows of the pixel circuits are connected with the driving output ends of the plurality of the brightness adjustment circuits in a one-to-one correspondence.

[0020] According to one embodiment of the present application, the display panel further comprises a gate driving circuit, the gate driving circuit comprising a plurality of shift registers;

[0021] The plurality of the shift registers are connected with the gate driving ends of the plurality of the brightness adjustment circuits in a one-to-one correspondence.

[0022] In a second aspect, the present application provides a display device, comprising the display panel.

[0023] According to the display device of the present application, in the refresh area scanning stage, the gate driving signal is provided to the refresh area, so as not to affect the display brightness of the refresh area, in the holding area scanning stage, the gate driving signal is stopped to be provided to the holding area, and the first potential signal is provided to the holding area, and the first potential signal is adjusted according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area, so as to make the first potential signal adjust the display brightness of the holding area to be consistent with the display brightness of the refresh area, thereby avoiding the brightness difference problem between the refresh area and the holding area caused by different refresh rates, and improving the display effect.

[0024] In a third aspect, the present application provides a brightness adjustment method of a display panel, the display panel comprising a refresh area and a holding area, the method comprising:

[0025] In the refresh area scanning stage, a gate driving signal is obtained, and the gate driving signal is provided to the refresh area, so as to drive the refresh area to perform refresh display;

[0026] In the holding area scanning stage, a first potential signal is acquired and provided to the holding area to adjust the brightness of the holding area to be consistent with the brightness of the refreshing area; the first potential signal is adjusted according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refreshing area.

[0027] According to the brightness adjustment method of the display panel provided by the application, in the refreshing area scanning stage, the gate driving signal is provided to the refreshing area without affecting the display brightness of the refreshing area, in the holding area scanning stage, the gate driving signal is stopped from being provided to the holding area, and the first potential signal is provided to the holding area, and the first potential signal is adjusted according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refreshing area, so that the first potential signal adjusts the display brightness of the holding area to be consistent with the display brightness of the refreshing area, thereby avoiding the brightness difference problem between the refreshing area and the holding area caused by different refreshing rates, and improving the display effect.

[0028] Additional aspects and advantages of the application will be made apparent by the following description and the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:

[0030] Figure 1 is one of the structural schematic diagrams of the brightness adjustment circuit in the display panel provided by the embodiments of the application;

[0031] Figure 2 is another structural schematic diagram of the brightness adjustment circuit in the display panel provided by the embodiments of the application;

[0032] Figure 3 is a schematic diagram of the display area of the display panel provided by the embodiments of the application;

[0033] Figure 4 is a signal timing diagram of the brightness adjustment circuit in the display panel provided by the embodiments of the application;

[0034] Figure 5 is a structural schematic diagram of the display panel provided by the embodiments of the application;

[0035] Figure 6 is a structural schematic diagram of the pixel circuit in the display panel provided by the embodiments of the application;

[0036] Figure 7 is a signal timing diagram of the pixel circuit in the display panel provided by the embodiments of the application;

[0037] Figure 8FIG. 1 is a flowchart of a brightness adjustment method of a display panel according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar components have the same or similar designations and functions throughout the various figures and embodiments. The embodiments described below are examples in which the present application can be practiced. Numerous other embodiments can be derived from these embodiments without departing from the scope of the present application.

[0039] Reference is made below to Figures 1-8 A display panel, a display device, and a brightness adjustment method of a display panel according to embodiments of the present application are described below.

[0040] Figure 1 FIG. 1 is a structural diagram of a brightness adjustment circuit of a display panel according to an embodiment of the present application. The display panel can be a low temperature polycrystalline oxide (LTPO) display panel. The display panel includes a display area, which includes a refresh area and a retention area. The refresh area is an area of the display area that needs to be refreshed, i.e., an area of the display area in which a picture needs to be changed for a short time. The retention area is an area of the display area that does not need to be refreshed, i.e., an area of the display area in which a picture does not need to be changed for a long time.

[0041] As shown in FIG. 2, the display panel according to an embodiment of the present application includes a brightness adjustment circuit. The brightness adjustment circuit includes a gating unit 1, an adjustment unit 2, a gate drive end GN, an enable signal end GE, and a drive output end OUT. The gating unit 1 is connected to the gate drive end GN and the adjustment unit 2. The adjustment unit 2 is connected to the enable signal end GE and the drive output end OUT. Figure 1 The gating unit 1 is configured to provide a gate drive signal of the gate drive end GN to the adjustment unit 2 in a refresh area scanning stage, and stop providing the gate drive signal of the gate drive end GN to the adjustment unit 2 in a retention area scanning stage.

[0042] The refresh area scanning stage refers to a stage of scanning the refresh area. Since the picture of the refresh area needs to be refreshed and displayed, the gating unit 2 is in a conducting state in the refresh scanning stage to provide the gate drive signal of the gate drive end GN to the adjustment unit 2. The retention area scanning stage refers to a stage of scanning the retention area. Since the picture of the retention area does not need to be refreshed and displayed, the gating unit is in an off state in the retention area scanning stage to stop providing the gate drive signal of the gate drive end GN to the adjustment unit 2.

[0043]

[0044] ​The adjusting unit 2 is configured to provide the gate driving signal to the driving output end OUT in the refresh area scanning stage to drive the refresh area to perform refresh display; and provide the first potential signal of the enable signal end GE to the driving output end OUT in the holding area scanning stage to adjust the display brightness of the holding area to be consistent with the display brightness of the refresh area; the first potential signal is set according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area.

[0045] In the refresh area scanning stage, the gating unit 1 provides the gate driving signal to the adjusting unit 2, and the adjusting unit 2 provides the gate driving signal to the driving output end OUT, so that the gate driving signal is output to the refresh area through the driving output end OUT to drive the refresh area to perform refresh display. Since the gate driving signal output to the refresh area through the driving output end OUT does not change, the display brightness of the refresh area is not affected, that is, the display brightness of the refresh area remains unchanged.

[0046] In the holding area scanning stage, the gating unit 1 does not provide the gate driving signal to the adjusting unit 2, and the enable signal end GE provides the first potential signal to the adjusting unit 2. The adjusting unit 2 provides the first potential signal of the enable signal end GE to the driving output end OUT, so that the first potential signal of the enable signal end GE is output to the holding area through the driving output end OUT to adjust the display brightness of the holding area, so that the display brightness of the adjusted display area is consistent with the display brightness of the refresh area.

[0047] The first potential signal of the enable signal end GE can be adjusted in advance. Specifically, the first potential signal is adjusted according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area. For example, before the display brightness of the holding area is adjusted, there is a brightness difference between the refresh area and the holding area, the difference between the display brightness of the refresh area and the display brightness of the holding area is detected, and the first potential signal is adjusted according to the difference, and the adjusted first potential signal is provided to the enable signal end GE, so that after the first potential signal of the enable signal end GE is provided to the holding area, the display brightness of the holding area can be adjusted to be consistent with the display brightness of the refresh area.

[0048] In the refresh area scanning stage, the adjusting unit 2 is configured to provide the gate driving signal to the driving output end OUT in the refresh area scanning stage to drive the refresh area to perform refresh display; and provide the first potential signal of the enable signal end GE to the driving output end OUT in the holding area scanning stage to adjust the display brightness of the holding area to be consistent with the display brightness of the refresh area; the first potential signal is set according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area.

[0049] In some embodiments, as Figure 1As shown, the gating unit 1 can be turned on or turned off based on the signal of the enable signal terminal GE. Specifically, the gating unit 1 is also connected with the enable signal terminal GE, and is further configured to, in the refresh area scanning stage, be turned on based on the second potential signal of the enable signal terminal GE to provide the gate driving signal of the gate driving terminal GN to the adjusting unit 2; and in the holding area scanning stage, be turned off based on the first potential signal of the enable signal terminal GE to stop providing the gate driving signal of the gate driving terminal GN to the adjusting unit 2.

[0050] The enable signal terminal GE can provide the first potential signal and the second potential signal. The first potential signal is a high potential signal, and the second potential signal is a low potential signal, or the first potential signal is a low potential signal, and the second potential signal is a high potential signal. In the refresh area scanning stage, the enable signal terminal GE provides the second potential signal, and the gating unit 1 is turned on under the control of the second potential signal of the enable signal terminal GE to provide the gate driving signal of the gate driving terminal GN to the adjusting unit 2. In the holding area scanning stage, the enable signal terminal GE provides the first potential signal, and the gating unit 1 is turned off under the control of the first potential signal of the enable signal terminal GE to stop providing the gate driving signal of the gate driving terminal GN to the adjusting unit 2.

[0051] In some embodiments, as shown, Figure 2 The adjusting unit 2 includes a first adjusting sub-unit 21 and a second adjusting sub-unit 22. The first adjusting sub-unit 21 is connected with the enable signal terminal GE and the driving output terminal OUT, respectively, and the second adjusting sub-unit 22 is connected with the enable signal terminal GE, the driving output terminal OUT and the gating unit 1, respectively.

[0052] The first adjusting sub-unit 21 is configured to, in the holding area scanning stage, be turned on based on the first potential signal of the enable signal terminal GE to provide the first potential signal of the enable signal terminal GE to the driving output terminal OUT.

[0053] The second adjusting sub-unit 22 is configured to, in the refresh area scanning stage, be turned on based on the second potential signal of the enable signal terminal GE to provide the gate driving signal to the driving output terminal OUT.

[0054] In the refresh area scanning stage, the enable signal terminal GE provides a second potential signal, under the control of the second potential signal of the enable signal terminal GE, the first adjusting subunit 21 is turned off and the second adjusting subunit 22 is turned on, so that the gate driving signal is output to the refresh area through the driving output terminal OUT to drive the refresh area to refresh the display, without affecting the display brightness of the refresh. In the holding area scanning stage, the enable signal terminal GE provides a first potential signal, under the control of the first potential signal of the enable signal terminal GE, the second adjusting subunit 22 is turned off and the first adjusting subunit 21 is turned on, so that the first potential signal of the enable signal terminal GE is output to the holding area through the driving output terminal OUT to adjust the display brightness of the holding area, so that the display brightness of the adjusted holding area is consistent with the display brightness of the refresh area.

[0055] In some embodiments, as shown in Figure 2 The first adjusting subunit 21 includes a first transistor T11 and a second transistor T22. The control terminal and the input terminal of the first transistor T11 are connected with the enable signal terminal GE respectively, and the output terminal of the first transistor T11 is connected with the input terminal of the second transistor T22. The control terminal of the second transistor T22 is connected with the enable signal terminal GE, and the output terminal of the second transistor T22 is connected with the driving output terminal OUT.

[0056] The second adjusting subunit 22 includes a third transistor T33. The control terminal of the third transistor T33 is connected with the enable signal terminal GE, the input terminal of the third transistor T33 is connected with the gating unit 1, and the output terminal of the third transistor T33 is connected with the driving output terminal OUT.

[0057] In the refresh area scanning stage, the enable signal terminal GE provides a second potential signal, the first transistor T11 and the second transistor T22 are turned off, the gating unit 1 and the third transistor T33 are turned on, and the gate driving signal of the gate driving terminal GN is output to the refresh area through the driving output terminal OUT. In the holding area scanning stage, the enable signal terminal GE provides a first potential signal, the gating unit 1 and the third transistor T33 are turned off, the first transistor T11 and the second transistor T22 are turned on, and the first potential signal of the enable signal terminal GE is output to the holding area through the driving output terminal OUT.

[0058] In the embodiment shown in FIG. 1, the first potential signal of the enable signal terminal GE is a low potential, the second potential signal is a high potential, the gating unit 1 is high potential effective, that is, the gating unit 1 is turned on under the control of the high potential signal, the first transistor T11 and the second transistor T22 are P-type transistors, and the third transistor T33 is an N-type transistor. Alternatively, the first potential signal of the enable signal terminal GE is a high potential, the second potential signal is a low potential, the gating unit 1 is low potential effective, that is, the gating unit 1 is turned on under the control of the low potential signal, the first transistor T11 and the second transistor T22 are N-type transistors, and the third transistor T33 is a P-type transistor.

[0059] For example Figure 3 As shown in FIG. 2, the display area AA of the display panel includes two refresh areas (i.e., a first refresh area A1 and a second refresh area A2) and a holding area A3, and the holding area A3 is located between the first refresh area A1 and the second refresh area A2. In the embodiment shown in FIG. 2, the gating unit 1 is high potential effective, the first transistor T11 and the second transistor T22 are P-type transistors, and the third transistor T33 is an N-type transistor.

[0060] In combination Figure 4 As shown in FIG. 3, after the signal is synchronized by the synchronization signal Vsync, the display panel scans in the order of the first refresh area A1, the holding area A3, and the second refresh area A2. In the first refresh area scanning stage t1, the enable signal terminal GE provides a high potential second potential signal, the first transistor T11 and the second transistor T22 are turned off, the gating unit 1 and the third transistor T33 are turned on, the gate drive signal of the gate drive terminal GN is output to the first refresh area A1 through the driving output terminal OUT, so as to drive the first refresh area A1 to refresh and display, without affecting the display brightness of the first refresh area A1, that is, the display brightness of the first refresh area A1 remains unchanged. In the holding area scanning stage t2, the enable signal terminal GE provides a low potential first potential signal, the gating unit 1 and the third transistor T33 are turned off, the first transistor T11 and the second transistor T22 are turned on, and the first potential signal of the enable signal terminal GE is output to the holding area A3 through the driving output terminal OUT, so as to adjust the display brightness of the holding area A3, so that the display brightness of the adjusted holding area A3 is consistent with the display brightness of the first refresh area A1. In the second refresh area scanning stage t3, the enable signal terminal GE provides a high potential second potential signal, the first transistor T11 and the second transistor T22 are turned off, the gating unit 1 and the third transistor T33 are turned on, and the gate drive signal of the gate drive terminal GN is output to the second refresh area A2 through the driving output terminal OUT, so as to drive the second refresh area A2 to refresh and display, without affecting the display brightness of the second refresh area A2, that is, the display brightness of the second refresh area A2 remains unchanged, and the display brightness of the second refresh area A2 is the same as the display brightness of the first refresh area A1.

[0061] For example Figure 5As shown, the display panel further comprises a pixel circuit 4 connected with the driving output terminal OUT. The pixel circuit 4 comprises a light emitting element D, and is configured to drive the light emitting element D to emit light according to the gate driving signal of the driving output terminal OUT in the refresh stage, and adjust the light emitting brightness of the light emitting element D according to the first potential signal of the driving output terminal OUT in the holding stage.

[0062] The pixel circuit 4 is located in the display area AA of the display panel, and the signal output by the brightness adjustment circuit 3 through the driving output terminal OUT is transmitted to the pixel circuit 4. If the area where the pixel circuit 4 is located is the refresh area, in the refresh area scanning stage, the pixel circuit 4 is in the refresh stage, the brightness adjustment circuit 3 provides the gate driving signal to the pixel circuit 4 through the driving output terminal OUT, and the pixel circuit 4 drives the light emitting element D to emit light according to the gate driving signal, that is, the light emitting element D in the pixel circuit 4 normally emits light and does not affect the display brightness of the refresh area. If the area where the pixel circuit 4 is located is the holding area, in the holding area scanning stage, the pixel circuit 4 is in the holding stage, the brightness adjustment circuit 3 provides the first potential signal to the pixel circuit 4 through the driving output terminal OUT, and the pixel circuit 4 adjusts the light emitting brightness of the light emitting element D according to the first potential signal, so that the light emitting brightness of the light emitting element D in the pixel circuit 4 in the holding stage is the same as that in the refresh stage, thereby ensuring that the display brightness of the refresh area and the holding area of the display panel is consistent.

[0063] As shown in the Figure 5 The display panel further comprises a plurality of brightness adjustment circuits 3 and a plurality of rows of pixel circuits, each row of pixel circuits comprising at least one pixel circuit 4. The plurality of rows of pixel circuits are connected one by one with the output terminals of the plurality of brightness adjustment circuits, that is, the number of rows of pixel circuits 4 is the same as the number of brightness adjustment circuits 3, and each row of pixel circuits corresponds to one brightness adjustment circuit, and each pixel circuit 4 in each row of pixel circuits is connected with the output terminal of the corresponding brightness adjustment circuit.

[0064] The display panel can further comprise a driving chip (not shown in the figure) connected with the enable signal terminal GE of the brightness adjustment circuit 3. The driving chip is configured to provide the first potential signal or the second potential signal to the enable signal terminal GE.

[0065] The display panel further comprises a gate driving circuit 5 comprising a plurality of shift registers 51. The plurality of shift registers 51 are connected one by one with the gate driving terminals GN of the plurality of brightness adjustment circuits 3, that is, the number of shift registers 51 is the same as the number of brightness adjustment circuits 3, and each shift register 51 is connected with the gate driving terminal GN of the corresponding brightness adjustment circuit 3.

[0066] The gate drive circuit 5 is connected to the frame start signal terminal NSTV. According to the frame start signal provided by the frame start signal terminal NSTV, the multiple shift registers 51 in the gate drive circuit 5 work sequentially to scan the multi-line pixel circuit line by line.

[0067] The refresh area of ​​the display panel includes at least one row of pixel circuits, and the holding area of ​​the display panel also includes at least one row of pixel circuits. During the refresh area scanning phase, the pixel circuits 4 in the refresh area are scanned. The shift register 51 corresponding to the pixel circuits 4 in the refresh area provides a gate drive signal to the gate drive terminal GN of the corresponding brightness adjustment circuit 3, and the enable signal terminal GE provides a second potential signal, so that the brightness adjustment circuit 3 provides the gate drive signal to the pixel circuits 4 in the refresh area through the drive output terminal OUT, thereby controlling the pixel circuits 4 in the refresh area to refresh. The light emission brightness of the light-emitting element D of the pixel circuits 4 in the refresh area remains unchanged, so that the display brightness of the refresh area remains unchanged. During the holding area scanning phase, the pixel circuit 4 of the holding area is scanned. The shift register 51 corresponding to the pixel circuit 4 of the holding area provides a gate drive signal to the gate drive terminal GN of the corresponding brightness adjustment circuit 3, and the enable signal terminal GE provides a first potential signal to control the brightness adjustment circuit 3 not to provide the gate drive signal to the pixel circuit 4 of the holding area. The brightness adjustment circuit 3 provides the first potential signal of the enable signal terminal GE to the pixel circuit 4 of the holding area through the drive output terminal OUT. The first potential signal is adjusted according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area. The pixel circuit 4 of the holding area can adjust the light emission brightness of the light-emitting element D based on the first potential signal, thereby realizing the adjustment of the display brightness of the holding area, so that the display brightness of the adjusted holding area is consistent with the display brightness of the refresh area.

[0068] The pixel circuit 4 can be a 7T1C circuit, an 8T1C circuit, or other types of circuits; no specific limitation is made here.

[0069] The working principle of pixel circuit 4 will be explained below using 8T1C circuit as an example.

[0070] like Figure 6 As shown, pixel circuit 4 includes fourth transistor T1, fifth transistor T2, sixth transistor T3, seventh transistor T4, eighth transistor T5, ninth transistor T6, tenth transistor T7, eleventh transistor T8, capacitor C1, and light-emitting element D.

[0071] The control terminal of the fifth transistor T2 is connected to the first scanning terminal Gate1, the input terminal of the fifth transistor T2 is connected to the first node N1, and the output terminal of the fifth transistor T2 is connected to the third node N3. Additionally, the drive output terminal OUT of the brightness adjustment circuit 3 is connected to the first scanning terminal Gate1.

[0072] The control terminal of the sixth transistor T3 is connected to the first node N1, the input terminal of the sixth transistor T3 is connected to the second node N2, and the output terminal of the sixth transistor T3 is connected to the third node N3. The control terminal of the eighth transistor T5 is connected to the light-emitting signal terminal EM, the input terminal of the eighth transistor T5 is connected to the first voltage signal terminal VDD, and the output terminal of the eighth transistor T5 is connected to the second node N2. The control terminal of the ninth transistor T6 is connected to the light-emitting signal terminal EM, the input terminal of the ninth transistor T6 is connected to the third node N3, and the output terminal of the ninth transistor T6 is connected to the anode of the light-emitting element D. The cathode of the light-emitting element D is connected to the second voltage signal terminal VSS. The control terminal of the seventh transistor T4 is connected to the second scan terminal Gate2, the input terminal of the seventh transistor T4 is connected to the data signal terminal Vdata, and the output terminal of the seventh transistor T4 is connected to the second node N2. One end of the capacitor C1 is connected to the first voltage signal terminal VDD, and the other end of the capacitor C1 is connected to the first node N1.

[0073] The control terminal of the fourth transistor T1 is connected to the first reset signal terminal Reset1, the input terminal of the fourth transistor T1 is connected to the first initialization signal terminal Vinit1, and the output terminal of the fourth transistor T1 is connected to the third node N3. The control terminal of the tenth transistor T7 is connected to the second reset signal terminal Reset2, the input terminal of the tenth transistor T7 is connected to the second initialization signal terminal Vinit2, and the output terminal of the tenth transistor T7 is connected to the anode of the light-emitting element D. The control terminal of the eleventh transistor T8 is connected to the second reset signal terminal Reset2, the input terminal of the eleventh transistor T8 is connected to the third initialization signal terminal Vinit3, and the output terminal of the eleventh transistor T8 is connected to the second node N2.

[0074] Among them, the fourth transistor T1 and the fifth transistor T2 are N-type transistors, and the sixth transistor T3, the seventh transistor T4, the eighth transistor T5, the ninth transistor T6, the tenth transistor T7, and the eleventh transistor T8 are P-type transistors.

[0075] When the pixel circuit 4 is in the refresh stage, the refresh stage can include a first reset stage t4, a data write stage t5, a second reset stage t6, and a light-emitting stage t7. In combination with Figure 7As shown, in the first reset stage t4, the first scan end Gate1 provides a high level signal, the second reset signal end Reset2 provides a low level signal, the fifth transistor T2, the sixth transistor T3, the tenth transistor T7 and the eleventh transistor T8 are turned on to reset the first node N1, the second node N2 and the third node N3. Then, the first scan end Gate1 provides a high level signal, the first reset signal end Reset1 provides a low level signal, the fourth transistor T1 and the fifth transistor T2 are turned on to reset the first node N1 and the second node N2. In the data writing stage t5, the first scan end Gate1 provides a high level signal, the second scan end Gate2 provides a low level signal, the fifth transistor T2, the sixth transistor T3 and the seventh transistor T4 are turned on to write the data signal provided by the data signal end Vdata to the first node N1. In the second reset stage t6, the second reset signal end Reset2 provides a low level signal, the tenth transistor T7 and the eleventh transistor T8 are turned on to reset the second node N2 and the third node N3. In the light emitting stage t7, the light emitting signal end EM provides a low level signal, the sixth transistor T3, the eighth transistor T5 and the ninth transistor T6 are turned on, and the light emitting element D emits light.

[0076] When the pixel circuit 4 is in the holding stage, the brightness adjusting unit 3 provides a first potential signal to the first scan end Gate1 through the driving output end OUT. Since the first potential signal is adjusted according to the difference between the display brightness of the holding area before the adjustment and the display brightness of the refreshing area, the voltage provided by the first scan end Gate1 changes, which attracts the holes or electrons at the first node N1, and then changes the voltage at the first node N1, so as to change the light emitting brightness of the light emitting element D, that is, to change the display brightness of the holding area. Specifically, if the voltage provided by the first scan end Gate1 becomes larger, the electrons at the first node N1 are attracted, so that the voltage at the first node N1 rises, thereby increasing the light emitting brightness of the light emitting element D. If the voltage provided by the first scan end Gate1 becomes smaller, the holes at the first node N1 are attracted, so that the voltage at the first node N1 decreases, thereby decreasing the light emitting brightness of the light emitting element D.

[0077] According to the display panel provided by the embodiment of the present application, in the refreshing area scanning stage, the gate driving signal is provided to the refreshing area, so as not to affect the display brightness of the refreshing area, in the holding area scanning stage, the gate driving signal is stopped to be provided to the holding area, and the first potential signal is provided to the holding area, and the first potential signal is adjusted according to the difference between the display brightness of the holding area before the adjustment and the display brightness of the refreshing area, so that the first potential signal adjusts the display brightness of the holding area to be consistent with the display brightness of the refreshing area, thereby avoiding the problem of brightness difference between the refreshing area and the holding area caused by different refreshing rates, and improving the display effect.

[0078] Correspondingly, the application further provides a display device comprising the display panel.

[0079] According to the display device provided by the application, in the refresh area scanning stage, the gate drive signal is provided to the refresh area so as not to affect the display brightness of the refresh area; in the holding area scanning stage, the gate drive signal is stopped from being provided to the holding area, and the first potential signal is provided to the holding area, and the first potential signal is adjusted according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area, so that the first potential signal adjusts the display brightness of the holding area to be consistent with the display brightness of the refresh area, thereby avoiding the problem of brightness difference between the refresh area and the holding area caused by different refresh rates, and improving the display effect.

[0080] The display device provided by the application can be applied to any product or component with display function, such as mobile phones, tablet computers, televisions, monitors, notebook computers, digital photo frames, navigation devices, etc.

[0081] Correspondingly, the application further provides a display panel brightness adjustment method, which can be applied to the display panel. Figure 8 The flowchart of the display panel brightness adjustment method provided by the application is shown.

[0082] As shown in the figure, Figure 8 The display panel brightness adjustment method provided by the application comprises steps 810 to 820, as follows:

[0083] Step 810, in the refresh area scanning stage, the gate drive signal is obtained and provided to the refresh area to drive the refresh area to refresh and display.

[0084] When the refresh area is scanned, the gate drive signal of the gate drive end is obtained and provided to the refresh area to drive the refresh area to refresh and display. Since the gate drive signal output from the drive output end OUT to the refresh area does not change, the display brightness of the refresh area is not affected, i.e. the display brightness of the refresh area remains unchanged.

[0085] Step 820, in the holding area scanning stage, the first potential signal is obtained and provided to the holding area to adjust the brightness of the holding area to be consistent with the brightness of the refresh area; the first potential signal is adjusted according to the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area.

[0086] When the holding area is scanned, the first potential signal of the enable signal end GE is obtained and provided to the holding area to adjust the display brightness of the holding area, so that the display brightness of the adjusted display area is consistent with the display brightness of the refresh area.

[0087] The first potential signal of the enable signal terminal GE can be adjusted in advance. Specifically, the first potential signal is adjusted according to a difference between the display brightness of the refresh area before the adjustment and the display brightness of the refresh area. For example, before the display brightness of the refresh area is adjusted, there is a difference in brightness between the refresh area and the refresh area, the difference between the display brightness of the refresh area and the display brightness of the refresh area is detected, and the first potential signal is adjusted according to the difference. The adjusted first potential signal is provided to the enable signal terminal GE, so that after the first potential signal of the enable signal terminal GE is provided to the refresh area, the display brightness of the refresh area can be adjusted to be consistent with the display brightness of the refresh area.

[0088] According to the display panel brightness adjustment method provided in the embodiments of the present application, in the refresh area scanning stage, the gate drive signal is provided to the refresh area so as not to affect the display brightness of the refresh area, in the refresh area scanning stage, the gate drive signal is stopped from being provided to the refresh area, and the first potential signal is provided to the refresh area, and the first potential signal is adjusted according to a difference between the display brightness of the refresh area before the adjustment and the display brightness of the refresh area, so that the first potential signal adjusts the display brightness of the refresh area to be consistent with the display brightness of the refresh area, thereby avoiding the problem of brightness difference between the refresh area and the refresh area caused by different refresh rates, and improving the display effect.

[0089] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and are not limited in number, for example, the first object can be one or more.

[0090] In the description of the present application, the meaning of "a plurality of" is two or more.

[0091] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0092] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A display panel, characterized in that, The display panel includes a refresh area and a hold area, and the display panel includes a brightness adjustment circuit, which includes a gating unit, an adjustment unit, a gate driving terminal, an enable signal terminal, and a driving output terminal. The gating unit is connected to the gate driving terminal and the adjustment unit respectively, and is used to provide the gate driving signal of the gate driving terminal to the adjustment unit during the refresh area scanning stage; and to stop providing the gate driving signal of the gate driving terminal to the adjustment unit during the hold area scanning stage. The adjustment unit is connected to the enable signal terminal and the drive output terminal respectively, and is used to provide the gate drive signal to the drive output terminal during the refresh area scanning phase to drive the refresh area to refresh the display; and to provide the first potential signal of the enable signal terminal to the drive output terminal during the hold area scanning phase to adjust the display brightness of the hold area to be consistent with the display brightness of the refresh area. The first potential signal is adjusted based on the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area.

2. The display panel according to claim 1, characterized in that, The gating unit is also connected to the enable signal terminal and is also used to conduct the second potential signal of the enable signal terminal during the refresh area scanning phase, so as to provide the gate drive signal of the gate drive terminal to the adjustment unit. During the holding region scanning phase, the first potential signal of the enable signal terminal is turned off to stop providing the gate drive signal of the gate drive terminal to the adjustment unit.

3. The display panel according to claim 1, characterized in that, The adjustment unit includes a first adjustment subunit and a second adjustment subunit; The first adjustment subunit is connected to the enable signal terminal and the drive output terminal respectively, and is used to provide the first potential signal of the enable signal terminal to the drive output terminal based on the first potential signal of the enable signal terminal during the holding area scanning phase. The second adjustment subunit is connected to the enable signal terminal, the drive output terminal and the gating unit respectively, and is used to provide the gate drive signal to the drive output terminal based on the second potential signal of the enable signal terminal during the refresh area scanning phase.

4. The display panel according to claim 3, characterized in that, The first regulation subunit includes a first transistor and a second transistor; The control terminal and input terminal of the first transistor are respectively connected to the enable signal terminal, and the output terminal of the first transistor is connected to the input terminal of the second transistor; the control terminal of the second transistor is connected to the enable signal terminal, and the output terminal of the second transistor is connected to the drive output terminal.

5. The display panel according to claim 3, characterized in that, The second regulation subunit includes a third transistor; The control terminal of the third transistor is connected to the enable signal terminal, the input terminal of the third transistor is connected to the gating unit, and the output terminal of the third transistor is connected to the drive output terminal.

6. The display panel according to claim 1, characterized in that, The display panel further includes a pixel circuit, and the pixel circuit includes a light-emitting element; The pixel circuit is connected to the drive output terminal and is used to drive the light-emitting element to emit light according to the gate drive signal of the drive output terminal during the refresh phase. During the holding phase, the luminous brightness of the light-emitting element is adjusted according to the first potential signal at the drive output terminal.

7. The display panel according to claim 6, characterized in that, The display panel also includes multiple brightness adjustment circuits and multiple rows of pixel circuits; The pixel circuits described in multiple rows are connected one-to-one with the drive output terminals of the brightness adjustment circuits described in multiple rows.

8. The display panel according to claim 7, characterized in that, The display panel further includes a gate driving circuit, which includes a plurality of shift registers; Each of the shift registers is connected to a corresponding gate drive terminal of the brightness adjustment circuit.

9. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 8.

10. A method for adjusting the brightness of a display panel, characterized in that, The display panel is the display panel as described in any one of claims 1 to 8, the display panel includes a refresh area and a hold area, and the method includes: During the refresh area scanning phase, a gate drive signal is acquired and provided to the refresh area to drive the refresh area to refresh and display. During the holding area scanning phase, a first potential signal is acquired and provided to the holding area to adjust the brightness of the holding area to match the brightness of the refresh area; the first potential signal is adjusted based on the difference between the display brightness of the holding area before adjustment and the display brightness of the refresh area.

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