CN116825032A

CN116825032A - Display panel and display device

Info

Publication number: CN116825032A
Application number: CN202310796962.1A
Authority: CN
Inventors: 张宇恒
Original assignee: Xiamen Tianma Display Technology Co Ltd
Current assignee: Xiamen Tianma Display Technology Co Ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-09-29

Abstract

The application discloses a display panel and a display device. The display panel comprises a driving chip, a pixel circuit and a light-emitting element, wherein the pixel circuit comprises a driving module, and the driving module is used for providing driving current for the light-emitting element under the control of the driving chip; the frame refreshing frequency of the pixel circuit in the first mode is F1, and the frame refreshing frequency of the pixel circuit in the second mode is F2, wherein F1 is not equal to F2; the gamma coefficient used by the driving chip is G1 in the first mode, and the gamma coefficient used by the driving chip is G2 in the second mode, wherein G1 is not equal to G2; the driving module is connected with a first control signal output by the driving chip in a first mode and connected with a second control signal output by the driving chip in a second mode; the first control signal corresponds to the first display brightness L1 of the light-emitting element, and the second control signal corresponds to the second display brightness L2 of the light-emitting element; where l1≡l2 or l1=l2. According to the embodiment of the application, the picture flickering phenomenon caused by frequency switching can be improved.

Description

Display panel and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a display panel and a display device.

Background

With the development of technology, the demands of users for display panels are increasing. To increase the user's visual fluency, panels supporting high refresh rates of 90HZ, 120HZ, etc. are presented.

With the application of the high-frequency display technology, how to achieve seamless switching between different refresh frequencies becomes one of the technical problems to be solved in the current display panel.

Disclosure of Invention

The embodiment of the application provides a display panel and a display device, which can improve the picture flickering phenomenon caused by frequency switching.

In a first aspect, an embodiment of the present application provides a display panel, including a driving chip, a pixel circuit, and a light emitting element, where the pixel circuit includes a driving module, and the driving module is configured to provide a driving current to the light emitting element under control of the driving chip; the frame refreshing frequency of the pixel circuit in the first mode is F1, and the frame refreshing frequency of the pixel circuit in the second mode is F2, wherein F1 is not equal to F2; the gamma coefficient used by the driving chip is G1 in the first mode, and the gamma coefficient used by the driving chip is G2 in the second mode, wherein G1 is not equal to G2; the driving module is connected with a first control signal output by the driving chip in a first mode and connected with a second control signal output by the driving chip in a second mode; the first control signal corresponds to the first display brightness L1 of the light-emitting element, and the second control signal corresponds to the second display brightness L2 of the light-emitting element; where l1≡l2 or l1=l2.

Based on the same inventive concept, in a second aspect, an embodiment of the present application provides a display device including the display panel according to the embodiment of the first aspect.

Compared with the prior art, the display panel and the display device provided by the embodiment of the application are provided with the driving chip, the pixel circuit and the light-emitting element, wherein the pixel circuit comprises the driving module, and the driving module is used for providing driving current for the light-emitting element under the control of the driving chip. The data refresh frequency of the pixel circuit in the first mode is F1, and the frame refresh frequency of the pixel circuit in the second mode is F2, wherein F1 is equal to F2. And the gamma coefficient used by the driving chip is G1 in the first mode, and the gamma coefficient used by the driving chip is G2 in the second mode, wherein G1 is not equal to G2. The driving module is connected with a first control signal output by the driving chip in a first mode, and connected with a second control signal output by the driving chip in a second mode. Since the first control signal corresponds to the first display brightness L1 of the light emitting element and the second control signal corresponds to the second display brightness L2, l1≡l2 or l1=l2 of the light emitting element, when the display images with different frame refresh frequencies and different gamma coefficients are switched, the display brightness of the light emitting unit can be kept the same or similar, thereby improving the image flicker phenomenon caused by frequency switching and improving the display effect of the display panel.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

Fig. 1 shows a schematic structural diagram of a display panel according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a pixel circuit in a display panel according to an embodiment of the present application;

fig. 3 shows a schematic brightness diagram of a display panel according to an embodiment of the application;

FIG. 4 is a schematic view showing another brightness of a display panel according to an embodiment of the present application;

FIG. 5 is a schematic diagram illustrating a brightness simulation of a display panel according to an embodiment of the present application;

fig. 6 is a schematic diagram showing another structure of a pixel circuit in a display panel according to an embodiment of the present application;

fig. 7 shows still another brightness schematic diagram of a display panel according to an embodiment of the application;

fig. 8 is a schematic diagram showing a pixel circuit in a display panel according to an embodiment of the present application;

fig. 9 is a schematic diagram showing a pixel circuit in a display panel according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It will be understood that when an element is referred to as being "connected" or "electrically connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, it is intended that the present application covers the modifications and variations of this application provided they come within the scope of the appended claims (the claims) and their equivalents. The embodiments provided by the embodiments of the present application may be combined with each other without contradiction.

As described in the background, the display panel may support a variety of refresh frequencies. However, under the same target brightness or the same gray scale picture, the picture flickering problem easily occurs when different refresh frequencies are switched.

Embodiments of the present application provide a display panel and a display device, and embodiments of the display panel and the display device will be described below with reference to the accompanying drawings.

An aspect of the embodiments of the present application provides a display panel, which may be an organic light emitting diode (OLED, organic Light Emitting Diode) display panel, a micro light emitting diode (micro LED, micro Light Emitting Diode) display panel, or other types of display panels, which is not limited in particular.

As shown in fig. 1, the display panel 100 may include a driving chip 10, a pixel circuit 20, and a light emitting element 30. The pixel circuit 20 includes a driving module 21, and the driving module 21 is configured to supply a driving current to the light emitting element 30 under the control of the driving chip 10.

The frame refresh frequency of the pixel circuit 20 operating in the first mode is F1, and the frame refresh frequency of the pixel circuit 20 operating in the second mode is F2, f1+.f2.

The gamma coefficient used to drive the chip 10 in the first mode is G1, and the gamma coefficient used to drive the chip 10 in the second mode is G2, g1+.g2.

The driving module 21 is connected to the first control signal output by the driving chip 10 in the first mode, and connected to the second control signal output by the driving chip 10 in the second mode. Wherein the first control signal corresponds to the first display luminance L1 of the light emitting element 30, and the second control signal corresponds to the second display luminance L2 of the light emitting element 30; l1≡l2 or l1=l2.

The display panel provided by the embodiment of the application is provided with the driving chip, the pixel circuit and the light-emitting element, wherein the pixel circuit comprises the driving module, and the driving module is used for providing driving current for the light-emitting element under the control of the driving chip. The frame refresh frequency of the pixel circuit in the first mode is F1, and the frame refresh frequency of the pixel circuit in the second mode is F2, wherein F1 is equal to F2. And the gamma coefficient used by the driving chip is G1 in the first mode, and the gamma coefficient used by the driving chip is G2 in the second mode, wherein G1 is not equal to G2. The driving module is connected with a first control signal output by the driving chip in a first mode, and connected with a second control signal output by the driving chip in a second mode. Since the first control signal corresponds to the first display brightness L1 of the light emitting element and the second control signal corresponds to the second display brightness L2, l1≡l2 or l1=l2 of the light emitting element, when the display images with different frame refresh frequencies and different gamma coefficients are switched, the display brightness of the light emitting unit can be kept the same or similar, thereby improving the image flicker phenomenon caused by frequency switching and improving the display effect of the display panel.

Alternatively, the driving chip 10 may be electrically connected to the pixel circuit 20 through a data line, and the control signal output by the driving chip 10 may be a data signal Vdata, and the first control signal and the second control signal in the above example may be a first data signal and a second data signal, respectively.

The data signal Vdata may be written into the control terminal of the driving module 21, and the driving currents generated by the driving module 21 may be different. For example, the driving module 21 may include a driving transistor T3, and a gate of the driving transistor T3 is a control terminal of the driving module 21.

The driving chip 10 may generate a control signal based on the gamma coefficient. The gamma coefficients may be different and the magnitude of the generated control signals may be different. In the embodiment of the application, under different working modes, different gamma coefficients can be used by the driving chip.

In the display panel, the general frame refresh frequency is the change frequency of the minimum unit subframe of the picture refresh, and the data refresh frequency is the frequency of writing the data signal Vdata into the control end of the driving module 21, taking the panel with the frame refresh frequency of 120HZ as an example for illustration, when the data refresh frequency is 120HZ, it indicates that 1 data writing frame is included in one data refresh period; when the data refresh frequency is 60HZ, it means that one data refresh period includes 1 data writing frame and 1 holding frame, the data writing frame refers to a subframe in which the data signal Vdata is written into the gate of the driving transistor T0, and the holding frame refers to a subframe in which the data signal Vdata is written into the gate of the driving transistor T0; when the data refresh frequency is 30HZ, it means that 1 data write frame and 3 hold frames are included in one data refresh period, and so on.

It is understood that in the case of a frame refresh frequency of 120HZ, a data refresh frequency of 60/30/10 …/1HZ or the like can be achieved by frame skipping. In the case of a frame refresh frequency of 90HZ, a data refresh frequency of 45/30/10 …/1HZ or the like can be achieved by frame skipping. In the case of a frame refresh frequency of 80HZ, a data refresh frequency of 40/20/10 …/1HZ or the like can be achieved by frame skipping. No frame skip is possible between the frame refresh frequency 120HZ and the frame refresh frequency 90HZ or 80 HZ.

In some alternative embodiments, when F1< F2, F2/F1 is a non-integer. That is, switching between the two modes cannot be achieved by frame skipping. Taking f2=120 HZ as an example, F1 may be 80HZ or 90HZ. For example, in the process of switching the data refresh frequency from 120HZ to 60HZ, the frame refresh frequency F1 can be used to balance the power consumption and the user experience when the sliding picture is stopped, and the data refresh frequency is reduced to a smaller data refresh frequency.

As described above, the driver chip may use different gamma coefficients in different modes of operation. The inventors have found that flicker problems may occur when the display panel is switched between the first and second modes of operation.

In some alternative embodiments, as shown in fig. 2, the pixel circuit 20 may further include an initialization module 22 for controlling the anode of the light emitting element 30 to be connected to an initialization signal. The initialization module 22 controls the anode of the light emitting element 30 to be connected to the first initialization signal V1 in the first mode, and controls the anode of the light emitting element 30 to be connected to the second initialization signal V2 in the second mode; wherein v1+.v2.

In this embodiment, the initialization module 22 is configured to control the anode of the light emitting element 30 to be connected to an initialization signal to initialize the anode of the light emitting element 30, and when the light emitting element 30 emits light, the anode of the light emitting element needs to be raised from the voltage of the initialization signal to the starting voltage of the light emitting element, and the process of raising from the voltage of the initialization signal to the starting voltage can be understood as the charging process of the anode. The greater the voltage of the initialization signal, the easier the anode of the light emitting element is charged to a bright voltage, and the easier the light emitting element emits light. On the contrary, the smaller the voltage of the initialization signal, the less easily the anode of the light emitting element is charged to the on-voltage, and the less easily the light emitting element emits light. Therefore, when the brightness of the light emitting element can be adjusted by adjusting the initialization signal and V1 in the first mode is not equal to V2 in the second mode, the brightness in the two modes is consistent by adjusting the initialization signal, so that the flicker phenomenon of the picture caused by frequency switching is improved.

Illustratively, V1, V2 are both negative voltage signals.

Alternatively, the initializing frequency of the anode of the light emitting element may be the same as the frame refresh frequency. The initializing frequency of the anode refers to the frequency of writing the initializing signal into the anode. And the frame refresh frequencies of the first mode and the second mode are different, so that the initialization frequencies of anodes of the light emitting elements in the first mode and the second mode are different. As shown in fig. 3, the frequencies of the low brightness in the waveforms are different. In fig. 3, the horizontal axis represents time, and the vertical axis represents luminance of the light emitting element.

For example, in the first mode, the initializing frequency of the anode of the light emitting element is F1, in the second mode, the initializing frequency of the anode of the light emitting element is F2, F1< F2, and the low luminance frequency in the second mode is relatively high. When the display panel is one-time programmable (One Time Programmble, OTP), in order to make the overall brightness of the first mode and the second mode as uniform as possible with respect to the same target brightness or the same grayscale screen, as shown in fig. 3, the high brightness in the second mode is higher than the high brightness in the first mode, so that the high brightness in the two modes is different, and the problem of flickering visible to human eyes easily occurs when switching between the first mode and the second mode.

In some alternative embodiments, V1< V2 when F1< F2. The frame refresh frequency of the second mode is larger, and the initialization signal of the anode is also relatively larger in the second mode, so that the anode of the light emitting element is easier to be charged to a bright voltage in the second mode, and the light emitting element emits light more easily. As shown in fig. 4, when F1< F2, V1< V2 corresponds to the low luminance in the luminance waveform in the second mode being raised, the high luminance in the luminance waveform in the second mode is lowered, so that the high luminance in the second mode is substantially level with the high luminance in the first mode, and the flicker phenomenon of the screen caused when the first mode and the second mode are switched can be reduced.

It can be understood that, in the case that the initializing signal of the anode in the second mode is relatively large, the highlighting time in the second mode is far longer than the lighting time, so as to ensure the brightness stability of high brightness, and improve the flicker problem.

As shown in fig. 5, when F1< F2, the inventor has also verified the actual display effect corresponding to V1< V2, and as can be seen from the fact that when F1< F2, V1< V2, the low luminance in the luminance waveform in the second mode can be increased, and the high luminance in the luminance waveform in the second mode can be decreased, so that the high luminance in the second mode is substantially level with the high luminance in the first mode, and the flicker phenomenon of the picture caused when the first mode and the second mode are switched can be reduced.

In other alternative embodiments, the frame time of the display panel includes a non-light-emitting period and a light-emitting period, the time length of the light-emitting period is T1 in the first mode, and the time length of the light-emitting period is T2 in the second mode; wherein, T1+.T2.

The light emitting element may alternately perform an illegal light stage and a light emitting stage, and a process from the non-light emitting stage to the light emitting stage may be regarded as a luminance recovery process of the light emitting element, and the longer the time length of the light emitting stage, the faster the luminance recovery of the light emitting element may be regarded as. Therefore, the brightness of the light-emitting element can be adjusted by adjusting the time length of the light-emitting stage, and when the T1 in the first mode is not equal to the T2 in the second mode, the aim that the brightness in the two modes tends to be consistent can be achieved by adjusting the time length of the light-emitting stage, so that the picture flicker phenomenon caused by frequency switching is improved.

For example, as shown in fig. 6, the pixel circuit 20 may further include a light emission control module 23, and the light emission control module 23 may be used to control the light emitting element 30 to perform a non-light emission period and a light emission period. When the light-emitting control module 23 is turned on, the light-emitting element 30 performs a light-emitting phase; when the light emission control module 23 is turned off, the light emitting element 30 performs a non-light emitting period.

The light emission control module 23 may be turned on or off under the control of the light emission control signal Emit. When the emission control signal Emit is at the on level, the emission control module 23 is turned on; when the emission control signal Emit is at the off level, the emission control module 23 is turned off. For example, the light emitting control module 23 includes a P-type transistor, and the on level is a low level and the off level is a high level.

The time length of the light emitting period is related to the duty ratio (duty) of the light emitting control signal Emit, which may be a ratio of the time length of the on level to the total time length.

In this embodiment, t1+.t2 may refer to: the duty ratio of the light emission control signal Emit in the first mode is duty1, and the duty ratio of the light emission control signal Emit in the first mode is duty2; wherein duty1 is not equal to duty2.

As described above, the initialization frequency of the anode of the light emitting element may be the same as the frame refresh frequency. In the first mode, the initializing frequency of the anode of the light emitting element is F1, and in the second mode, the initializing frequency of the anode of the light emitting element is F2. In the case of F1< F2, the low luminance frequency in the second mode is relatively high, resulting in the presence of a higher luminance in the second mode than in the first mode as shown in fig. 3, such that the high luminance in the two modes is different, and flickering problem visible to the human eye easily occurs when switching between the first mode and the second mode.

In some alternative embodiments, T1< T2 when F1< F2. The frame refresh frequency of the second mode is larger and the time length of the light-emitting phase in the second mode is also relatively larger, so that the brightness in the second mode is recovered faster. As shown in fig. 7, when F1< F2, in the case of T1< T2, although the frequency of the low luminance in the second mode is relatively high, the highlighting time in the second mode is much longer than the low lighting time, and the luminance in the second mode is recovered faster, so that the high luminance in the second mode is substantially level with the high luminance in the first mode, and the luminance stability of the high luminance is ensured, thereby reducing the flicker phenomenon of the screen caused when the first mode and the second mode are switched.

In this embodiment, T1< T2 may refer to: the duty ratio of the light emission control signal Emit in the first mode is duty1, and the duty ratio of the light emission control signal Emit in the first mode is duty2; wherein duty 1< duty2.

In some alternative embodiments, as shown in fig. 8, the pixel circuit 20 further includes a data writing module 24 and an initializing module 22, where the data writing module 24 is configured to selectively control the driving module 21 to access the control signal outputted by the driving chip under the control of the third control signal S3, and the initializing module 22 is configured to access the initializing signal Vref2 to the anode of the light emitting element 30 under the control of the fourth control signal S4.

The third control signal S3 and the fourth control signal S4 are different control signals. That is, the data writing module 24 and the initializing module 22 may be controlled by different control signals, respectively.

The refresh frequency of the fourth control signal S4 in the first mode is F3, and the refresh frequency of the fourth control signal S4 in the second mode is F4, f3+.f4.

As described above, when the light emitting element 30 emits light, the anode of the light emitting element needs to be raised from the voltage of the initialization signal to the lighting-on voltage of the light emitting element, and the process of raising from the voltage of the initialization signal to the lighting-on voltage can be understood as the charging process of the anode. The more the initialization signal Vref2 is written to the anode of the light emitting element 30, the more the number of times the anode of the light emitting element 30 needs to be charged, and the less the light emitting element as a whole is likely to emit light. Therefore, the refresh frequency of the fourth control signal S4 can adjust the brightness of the light emitting device, and when the F3 in the first mode is not equal to the F4 in the second mode, the refresh frequency of the fourth control signal S4 is adjusted to achieve the goal that the brightness tends to be consistent in the two modes, thereby improving the flicker phenomenon of the picture caused by frequency switching.

The refresh frequency of the fourth control signal S4 may refer to the frequency at which the initialization signal is written to the anode, or may refer to the initialization frequency of the anode of the light emitting element.

In some alternative embodiments, when F1< F2, F3> F4. The frame refresh frequency of the second mode is larger, and the initialization frequency of the anode in the second mode is relatively lower, so that the number of times of charging the anode of the light-emitting element in the second mode can be reduced, and the light-emitting element is easier to emit light, and the high brightness in the second mode is basically equal to the high brightness in the first mode, so that the picture flickering phenomenon caused by switching between the first mode and the second mode can be reduced.

Of course, in other examples, as shown in fig. 9, the pixel circuit 20 further includes a data writing module 24 and an initializing module 22, the data writing module 24 is configured to selectively control the driving module 21 to access the control signal outputted by the driving chip under the control of the third control signal S3, and the initializing module 22 is configured to access the initializing signal Vref2 to the anode of the light emitting element 30 under the control of the third control signal S3. That is, the data writing module 24 and the initializing module 22 may be controlled with the same control signal.

Optionally, as shown in fig. 8 or 9, the pixel circuit 20 may further include a threshold compensation module 25, a reset module 26, and a storage capacitor Cst. The threshold compensation module 25 is configured to compensate the threshold voltage of the driving module 21, the reset module 26 is configured to control the driving module 21 to access the reset signal Vref1, and the storage capacitor Cst is configured to store the charge written into the control terminal of the driving module 21.

The driving module 21 may include a driving transistor T3, the data writing module 24 may include a second transistor T2, the light emitting control module 23 may include a first transistor T1 and a sixth transistor T6, the threshold compensation module 25 may include a fourth transistor T4, the reset module 26 may include a fifth transistor T5, and the initialization module 22 may include a seventh transistor T7.

The gate of the second transistor T2 is for receiving the third control signal S3, the gate of the seventh transistor T7 is for receiving the third control signal S3 or the fourth control signal S4, the gates of the first transistor T1 and the sixth transistor T6 are for receiving the emission control signal Emit, the gate of the fifth transistor T5 is for receiving the fifth control signal sc_n (N-1), and the gate of the fourth transistor T4 is for receiving the sixth control signal sc_n (N). In addition, VDD denotes a positive polarity power supply signal, VEE denotes a negative polarity power supply signal. N1, N2, N3, N4 denote connection nodes.

It should be noted that, the transistor in the embodiment of the present application may be an N-type transistor or a P-type transistor. For an N-type transistor, the on level is high and the off level is low. That is, the gate potential of the N-type transistor is on between the first and second poles when the gate potential is high, and is off between the first and second poles when the gate potential is low. For a P-type transistor, the on level is low and the off level is high. That is, when the gate potential of the P-type transistor is at a low level, the first and second poles are turned on, and when the gate potential of the P-type transistor is at a high level, the first and second poles are turned off. In a specific implementation, the gate of each transistor is used as a control electrode, and the first electrode of each transistor may be used as a source electrode, the second electrode may be used as a drain electrode, or the first electrode may be used as a drain electrode, and the second electrode may be used as a source electrode, which is not distinguished herein.

In some alternative embodiments, the first mode includes an S1 frame refresh frame in one data refresh period of the display panel, the second mode includes an S2 frame refresh frame in one data refresh period of the display panel, and neither the S1 frame refresh frame nor the S2 frame refresh frame includes a hold frame, which does not include a data writing stage; s1 is more than or equal to 1, and S2 is more than or equal to 1.

In the case where the hold frame is not included in the data refresh period, the flicker phenomenon does not easily occur in the switching between the first mode and the second mode, and therefore, it is unnecessary to adjust the initialization signal, the light emission time length, and the like, and therefore, the display can be driven directly in accordance with the first control signal in the first mode, and the display can be driven directly in accordance with the second control signal in the second mode.

The application also provides a display device comprising the display panel provided by the application. Referring to fig. 10, fig. 10 is a schematic structural diagram of a display device according to an embodiment of the application. Fig. 10 provides a display device 1000 including a display panel 100, and the display panel 100 may be a display panel described in any of the foregoing embodiments. The embodiment of fig. 10 is only an example of a mobile phone, and the display device 1000 is described, and it is to be understood that the display device provided in the embodiment of the present application may be a wearable product, a computer, a television, a vehicle-mounted display device, or other display devices with display functions, which is not particularly limited in the present application. The display device provided by the embodiment of the present application has the beneficial effects of the display panel provided by the embodiment of the present application, and the specific description of the display panel in the above embodiments may be referred to specifically, and this embodiment is not repeated here.

Through the above description, the display device provided by the present application includes a display panel, wherein the display panel includes a driving chip 10, a pixel circuit 20, and a light emitting element 30. The pixel circuit 20 includes a driving module 21, and the driving module 21 is configured to supply a driving current to the light emitting element 30 under the control of the driving chip 10.

These embodiments are not exhaustive of all details, nor are they intended to limit the application to the precise embodiments disclosed, in accordance with the application. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and the practical application, to thereby enable others skilled in the art to best utilize the application and various modifications as are suited to the particular use contemplated. The application is limited only by the claims and the full scope and equivalents thereof.

Claims

1. A display panel, comprising:

the pixel circuit comprises a driving module, a driving chip, a pixel circuit and a light-emitting element, wherein the driving module is used for providing driving current for the light-emitting element under the control of the driving chip;

the frame refreshing frequency of the pixel circuit in the first mode is F1, and the frame refreshing frequency of the pixel circuit in the second mode is F2, wherein F1 is not equal to F2;

the gamma coefficient used by the driving chip is G1 in the first mode, and the gamma coefficient used by the driving chip is G2 in the second mode, wherein G1 is not equal to G2;

the driving module is connected with a first control signal output by the driving chip in the first mode, and connected with a second control signal output by the driving chip in the second mode;

wherein the first control signal corresponds to a first display brightness L1 of the light emitting element, and the second control signal corresponds to a second display brightness L2 of the light emitting element; wherein,,

l1≡l2 or l1=l2.

2. The display panel of claim 1, wherein the pixel circuit further comprises an initialization module for controlling an anode of the light emitting element to be connected to an initialization signal;

the initialization module controls the anode of the light-emitting element to be connected with a first initialization signal V1 in the first mode, and controls the anode of the light-emitting element to be connected with a second initialization signal V2 in the second mode; wherein,,

V1≠V2。

3. the display panel of claim 2, wherein V1< V2 when F1< F2.

4. The display panel according to claim 1, wherein a frame time of the display panel includes a non-light-emitting period and a light-emitting period, the light-emitting period being a time length T1 in the first mode, and the light-emitting period being a time length T2 in the second mode; wherein,,

T1≠T2。

5. the display panel of claim 4, wherein T1< T2 when F1< F2.

6. The display panel of claim 1, wherein F2/F1 is a non-integer when F1< F2.

7. The display panel of claim 1, wherein the first mode display panel includes an S1 frame refresh screen in one data refresh period, the second mode display panel includes an S2 frame refresh screen in one data refresh period, and neither the S1 frame refresh screen nor the S2 frame refresh screen includes a hold frame, the hold frame not including a data write phase; s1 is more than or equal to 1, and S2 is more than or equal to 1.

8. The display panel according to claim 1, wherein the pixel circuit further comprises a data writing module and an initializing module, the data writing module is used for selectively controlling the driving module to access the control signal output by the driving chip under the control of a third control signal, and the initializing module is used for accessing the initializing signal to the anode of the light emitting element under the control of a fourth control signal;

the third control signal and the fourth control signal are different control signals;

the refresh frequency of the fourth control signal in the first mode is F3, and the refresh frequency of the fourth control signal in the second mode is F4, wherein F3 is equal to F4.

9. The display panel of claim 8, wherein F3> F4 when F1< F2.

10. A display device, characterized in that the display device comprises a display panel according to claims 1-9.