CN114743507A

CN114743507A - Display panel, driving method thereof and display device

Info

Publication number: CN114743507A
Application number: CN202210461421.9A
Authority: CN
Inventors: 上官修宁
Original assignee: Yungu Guan Technology Co Ltd
Current assignee: Yungu Guan Technology Co Ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-07-12
Anticipated expiration: 2042-04-28
Also published as: CN114743507B

Abstract

The embodiment of the application provides a display panel, a driving method thereof and a display device, wherein the display panel comprises a first reset signal line, a second reset signal line and a first color sub-pixel, the first color sub-pixel comprises a first driving transistor and a first color light-emitting element, and a first pole of the first driving transistor is electrically connected with an anode of the first color light-emitting element and used for driving the first color light-emitting element to emit light; the first reset signal line is electrically connected with the grid electrode of the first driving transistor and used for providing a first reset signal for the grid electrode of the first driving transistor; the second reset signal line is electrically connected to the anode of the first color light emitting element and is used for providing a second reset signal to the anode of the first color light emitting element, and the voltage value of the second reset signal is different from that of the first reset signal. The embodiment of the application can improve or even eliminate the color cast/color cast problem of the display panel when the picture is switched.

Description

Display panel, driving method thereof and display device

Technical Field

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

Background

With the development of display technology and the increase of user demand, the user demands for the display effect of the display panel more and more. However, the inventors of the present application have found that when the display panel is switched from the black state to the display screen, the display panel may suffer from color shift/color cast, and thus the display effect of the display panel is poor.

Disclosure of Invention

The embodiment of the application provides a display panel, a driving method thereof and a display device, which can solve or even eliminate the color cast/color cast problem of the display panel when the display panel switches the picture, and improve the display effect of the display panel.

In a first aspect, an embodiment of the present application provides a display panel, which includes a first reset signal line, a second reset signal line, and a first color sub-pixel, where the first color sub-pixel includes a first driving transistor and a first color light emitting element, a first electrode of the first driving transistor is electrically connected to an anode of the first color light emitting element, and the first driving transistor is configured to drive the first color light emitting element to emit light; the first reset signal line is electrically connected with the grid electrode of the first driving transistor and used for providing a first reset signal for the grid electrode of the first driving transistor; the second reset signal line is electrically connected to the anode of the first color light emitting element and is used for providing a second reset signal to the anode of the first color light emitting element, and the voltage value of the second reset signal is different from that of the first reset signal.

According to an embodiment of the first aspect of the present application, the display panel further includes a third reset signal line and a second color sub-pixel, the second color sub-pixel includes a second driving transistor and a second color light emitting element, a first pole of the second driving transistor is electrically connected to an anode of the second color light emitting element, and the second driving transistor is configured to drive the second color light emitting element to emit light; the first reset signal line is also electrically connected with the grid electrode of the second driving transistor and used for providing a first reset signal for the grid electrode of the second driving transistor, the third reset signal line is electrically connected with the anode of the second color light-emitting element and used for providing a third reset signal for the anode of the second color light-emitting element, and the voltage value of the third reset signal is different from that of the second reset signal.

The inventors of the present application further found that, when the second color light emitting element and the first color light emitting element are reset by a reset signal having the same voltage value, since the on-voltage of the second color light emitting element is smaller than the on-voltage of the first color light emitting element, the second color light emitting element is more easily turned on (emits light), which may cause a problem that the second color light emitting element cannot be turned off and still emits light weakly when the display panel displays a black screen, that is, a problem that the black screen is not black. Therefore, in the embodiment of the application, the third reset signal line is additionally arranged and is used for resetting the anode of the second color light emitting element, and the voltage value of the third reset signal is different from that of the second reset signal, so that on one hand, the anode of the first color light emitting element can be reset based on the second reset signal, the light emitting brightness of the first color light emitting element is improved, and the color cast/color cast problem of the display panel during picture switching is improved and even eliminated; on the other hand, the anode of the second color light emitting element can be reset based on the third reset signal, so that the voltage of the anode of the second color light emitting element is reduced, and the second color light emitting element is turned off in a black screen.

According to any one of the embodiments of the first aspect of the present application, the light emitting elements of the first color have a higher turn-on voltage than the light emitting elements of the second color, and the second reset signal has a higher voltage value than the third reset signal.

Therefore, in the embodiment of the application, the third reset signal line is additionally arranged and is used for resetting the anode of the second color light emitting element, and the voltage value of the third reset signal is different from that of the second reset signal, so that on one hand, the anode of the first color light emitting element can be reset based on the second reset signal, the light emitting brightness of the first color light emitting element is improved, and the color cast/color cast problem of the display panel during picture switching is improved and even eliminated; on the other hand, the anode of the second color light emitting element can be reset based on a third reset signal with a smaller voltage value than the second reset signal, so that the voltage of the anode of the second color light emitting element is reduced, and the second color light emitting element is turned off during a black picture, so that the problem that the black picture is not black is solved.

According to any one of the preceding embodiments of the first aspect of the present application, the first color light emitting elements comprise green light emitting elements and the second color light emitting elements comprise at least one of red light emitting elements and blue light emitting elements.

Therefore, on one hand, the anode of the green light-emitting element can be reset based on the second reset signal, so that the light-emitting brightness of the green light-emitting element is improved, and the color cast/color cast problem of the display panel during picture switching is improved or even eliminated; on the other hand, the anode of the red light emitting element and/or the anode of the blue light emitting element may be reset based on a third reset signal having a smaller voltage value than the second reset signal, so as to reduce the voltage of the anode of the red light emitting element and/or the blue light emitting element, and further turn off the red light emitting element and/or the blue light emitting element during a black screen, so as to solve the problem that the black screen is not black.

According to any one of the embodiments of the first aspect of the present application, the display panel further comprises a data signal line electrically connected to the first color sub-pixel; the display panel is divided into a first interval and a second interval, and in the first interval, the data signal line provides a first data signal for the first color sub-pixel; in a second interval, the data signal line provides a second data signal to the first color sub-pixel; the duration of the first interval is less than the duration of the second interval, and the voltage value of the first data signal is less than the voltage value of the second data signal.

Therefore, in the embodiment of the application, the data signal line transmits the first data signal in the first interval, and since the voltage value of the first data signal is smaller than that of the second data signal, the potential of the data signal line is stepped down in the first interval, and further, under the coupling effect of the coupling capacitor between the data signal line and the gate of the first driving transistor, the potential of the gate of the first driving transistor is also pulled down, so that the current flowing between the source and the drain of the first driving transistor is increased, the charging duration of the first color light emitting element is further shortened, the luminance of the first color light emitting element is increased, the color cast/cast problem of the display panel during switching the picture is improved and even eliminated, and the display effect of the display panel is improved.

According to any one of the preceding embodiments of the first aspect of the present application, the first interval comprises a first sub-interval and a second sub-interval, and the first sub-interval is separated from the second sub-interval by the second interval.

Therefore, in the embodiment of the application, the data signal line transmits the first data signal at the beginning of each frame (the first subinterval) and at the end of each frame (the second subinterval), that is, the potentials of the data signal line and the gate of the first driving transistor are pulled down for multiple times, so that a larger current flows between the source and the drain of the first driving transistor for multiple times, the charging duration of the first color light emitting element is further shortened, the light emitting brightness of the first color light emitting element is improved, the color cast/color cast problem of the display panel during the frame switching is improved and even eliminated, and the display effect of the display panel is improved.

According to any one of the preceding embodiments of the first aspect of the present application, the voltage value of the first data signal is 0V.

Due to the limitation of the output channel and the output capability of the driving chip, the driving chip can only output 0V to the maximum extent at present. Therefore, the voltage value of the first data signal is 0V, which can make the potential of the data signal line jump to the lowest, i.e. the potential variation degree of the data signal line reaches the maximum, thereby greatly increasing the current flowing between the source and the drain of the first driving transistor, shortening the charging time of the first color light emitting element, improving the light emitting brightness of the first color light emitting element, and improving or even eliminating the color cast/color cast problem of the display panel when switching the picture.

According to any of the preceding embodiments of the first aspect of the present application, the voltage value of the second reset signal is greater than the voltage value of the first reset signal.

Therefore, the second reset signal line is additionally arranged on the basis of the first reset signal line and is used for independently resetting the anode of the first color light-emitting element, and the voltage value of the second reset signal is greater than that of the first reset signal, so that the voltage value of the reset signal of the anode of the first color light-emitting element is increased, the charging time of the first color light-emitting element is further shortened, the light-emitting brightness of the first color light-emitting element is increased, the color cast/color cast problem of the display panel during picture switching is improved and even eliminated, and the display effect of the display panel is improved.

According to any one of the foregoing embodiments of the first aspect of the present application, the display panel further includes a fourth reset signal line and a third color sub-pixel, the third color sub-pixel includes a third driving transistor and a third color light emitting element, and a first electrode of the third driving transistor is electrically connected to an anode of the third color light emitting element for driving the third color light emitting element to emit light; the first reset signal line is also electrically connected with the grid electrode of the third driving transistor and used for providing a first reset signal for the grid electrode of the third driving transistor; and the fourth reset signal line is electrically connected with the anode of the third color light-emitting element and is used for providing a fourth reset signal to the anode of the third color light-emitting element, and the voltage value of the fourth reset signal is different from the voltage values of the second reset signal and the third reset signal.

Therefore, considering that the lighting voltages of the second color light-emitting element and the third color light-emitting element may be different, different reset signal lines are adopted to reset the second color light-emitting element and the third color light-emitting element respectively, so that the light-emitting elements with different colors can be turned off in the case of a black picture, the problem that the black picture is not black can be solved, and the problem of color cast/color cast caused by inconsistent lighting durations of the light-emitting elements with different colors can be solved.

According to one embodiment of the first aspect of the present application, any one of a first frame to an nth frame is displayed on the display panel, the first reset signal lines each provide a first reset signal to the gate of the first driving transistor, the second reset signal lines each provide a second reset signal to the anode of the first color light emitting element, and n is an integer greater than or equal to 1.

Therefore, on one hand, when the first frame of picture is displayed, the second reset signal is provided for the anode of the first color light-emitting element through the second reset signal line, so that the luminance of the first color light-emitting element when the first frame of picture is displayed can be improved, the color cast/color cast problem of the display panel when the first frame of picture is switched can be improved and even eliminated, and the display effect of the display panel can be improved; on the other hand, in each frame subsequent to the first frame, the second reset signal is also provided to the anode of the first color light emitting element through the second reset signal line, so that the reset degrees of the anodes of the first color light emitting elements in different frames can be ensured to be the same or similar, and the display panel can be ensured to have better display effect.

According to any one of the preceding embodiments of the first aspect of the present application, the first color sub-pixel further comprises a threshold compensation transistor, the threshold compensation transistor is a dual-gate transistor, the first gate and the second gate of the threshold compensation transistor are both electrically connected to the first scanning signal line, the first gate of the threshold compensation transistor is electrically connected to the gate of the first driving transistor, and the second gate of the threshold compensation transistor is electrically connected to the first gate of the first driving transistor.

Therefore, the threshold compensation transistor electrically connected with the gate of the first driving transistor is a double-gate transistor, and the degree of leakage current of the double-gate transistor is relatively small, so that the leakage current of the gate of the first driving transistor can be reduced by adopting the double-gate transistor, relatively large current is ensured to continuously flow between the source and the drain of the first driving transistor, the charging duration of the first color light-emitting element is favorably shortened, the light-emitting brightness of the first color light-emitting element is improved, the color cast/color cast problem of the display panel during picture switching is improved and even eliminated, and the light-emitting stability of the first color light-emitting element is favorably ensured.

In a second aspect, an embodiment of the present application provides a driving method of a display panel, the display panel including a first reset signal line, a second reset signal line, and a first color sub-pixel, the first color sub-pixel including a first driving transistor and a first color light emitting element, a first electrode of the first driving transistor being electrically connected to an anode of the first color light emitting element, the first driving transistor being configured to drive the first color light emitting element to emit light; the first reset signal line is electrically connected with the grid electrode of the first driving transistor, and the second reset signal line is electrically connected with the anode of the first color light-emitting element; the driving method comprises the following steps: a first reset signal is supplied to the gate of the first driving transistor through a first reset signal line, and a second reset signal having a voltage value different from that of the first reset signal is supplied to the anode of the first color light emitting element through a second reset signal line.

In a third aspect, an embodiment of the present application provides a display device, which includes the display panel provided in the first aspect.

The display panel comprises a first reset signal line, a second reset signal line and a first color sub-pixel, wherein the first color sub-pixel comprises a first driving transistor and a first color light-emitting element, a first pole of the first driving transistor is electrically connected with an anode of the first color light-emitting element, and the first driving transistor is used for driving the first color light-emitting element to emit light; the first reset signal line is electrically connected with the grid electrode of the first driving transistor and used for providing a first reset signal for the grid electrode of the first driving transistor, the second reset signal line is electrically connected with the anode of the first color light-emitting element and used for providing a second reset signal for the anode of the first color light-emitting element, and the voltage value of the second reset signal is different from that of the first reset signal. Compared with the prior art in which the gate of the first driving transistor and the anode of the first color light emitting element are reset by the same reset signal, the embodiment of the present application adds a second reset signal line on the basis of the first reset signal line for individually resetting the anode of the first color light emitting element, thereby, when resetting the anode of the first color light emitting element, whether the voltage value of the reset signal of the gate of the first drive transistor satisfies the data wipe requirement or not is not necessary to be considered, this provides the possibility to boost the voltage value of the reset signal for the anode of the light emitting element of the first color, therefore, the charging time of the first color light-emitting element can be shortened, the light-emitting brightness of the first color light-emitting element is improved, the color cast/color cast problem of the display panel during picture switching is improved and even eliminated, and the display effect of the display panel is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating brightness of a target image when a display panel switches from a black state to the target image;

FIG. 2 is a schematic diagram illustrating the brightness of a green sub-pixel when the display panel switches from a black state to a target picture;

FIG. 3 is a schematic diagram illustrating the brightness of a red sub-pixel when the display panel switches from a black state to a target picture;

FIG. 4 is a schematic diagram illustrating the brightness of a blue sub-pixel when the display panel is switched from a black state to a target picture;

fig. 5 is a circuit schematic diagram of a display panel according to an embodiment of the present disclosure;

fig. 6 is another circuit schematic diagram of a display panel according to an embodiment of the present disclosure;

fig. 7 is a schematic circuit diagram of a display panel according to an embodiment of the present disclosure;

fig. 8 is a schematic circuit diagram of a display panel according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram illustrating a period of a frame displayed on the display panel according to an embodiment of the present disclosure;

FIG. 10 is a schematic circuit diagram of a first color sub-pixel in a display panel according to an embodiment of the present disclosure;

FIG. 11 is a driving diagram of the circuit of FIG. 10;

fig. 12 is a schematic flowchart of a driving method of a display panel according to an embodiment of the present disclosure;

fig. 13 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 present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent 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 present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.

Note that the transistors in the embodiments of the present application are described using P-type transistors as examples, but the transistors are not limited to P-type transistors, and may be replaced with N-type transistors. For a P-type transistor, the on level is low and the off level is high. That is, when the control terminal of the P-type transistor is at a low level, the first pole and the second pole of the P-type transistor are turned on, and when the control terminal of the P-type transistor is at a high level, the first pole and the second pole of the P-type transistor are turned off. For an N-type transistor, the on level is high and the off level is low. That is, when the gate of the N-type transistor is at a high level, the first pole and the second pole of the N-type transistor are turned on, and when the gate of the N-type transistor is at a low level, the first pole and the second pole of the N-type transistor are turned off. In a specific implementation, the gate of each transistor is used as its control electrode, and according to the signal of the gate of each transistor and its type, the first electrode of each transistor can be used as its source and the second electrode as its drain, or the first electrode of each transistor can be used as its drain and the second electrode as its source, which are not distinguished herein.

In the embodiments of the present application, the term "electrically connected" may mean that two components are directly electrically connected, or may mean that two components are electrically connected to each other via one or more other components.

Before explaining the technical solutions provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically explains the problems existing in the prior art:

as described above, the inventors of the present application have found that in the related art, when the display panel is switched from the black state to the display screen, the display panel may suffer from color shift/color shift, which may result in poor display effect of the display panel.

In order to solve the above technical problems, the inventors of the present application first conducted research and analysis on the root causes leading to the above technical problems, and the specific research and analysis processes are as follows:

the display panel typically includes a plurality of color sub-pixels, such as a red sub-pixel, a blue sub-pixel, and a green sub-pixel. The red sub-pixel may in turn comprise a red light emitting element, the blue sub-pixel may in turn comprise a blue light emitting element, and the green sub-pixel may in turn comprise a green light emitting element. When each color light emitting element emits light, each color light emitting element needs to reach the lighting voltage corresponding to each color light emitting element. However, the inventors of the present application have found that the lighting voltages of the light emitting elements of different colors are different, resulting in different charging periods of the light emitting elements of different colors, or different light emitting periods of the light emitting elements of different colors. For example, the turn-on voltage of the green light-emitting element is higher than the turn-on voltage of the red light-emitting element, while the turn-on voltage of the green light-emitting element is higher than the turn-on voltage of the blue light-emitting element. Thus, the charging period of the green light emitting element is longer than the charging period of the red light emitting element and/or the blue light emitting element. Accordingly, the light emission time period of the green light emitting element may be shorter than the light emission time period of the red light emitting element and/or the blue light emitting element, thereby causing a color shift/color shift problem.

For ease of understanding, the color shift/color shift problem of the display panel will be described below with reference to fig. 1 to 4.

Fig. 1 is a schematic diagram of the brightness of a target screen when a display panel switches from a black state to the target screen. FIG. 2 is a diagram illustrating the brightness of the green sub-pixel when the display panel switches from the black state to the target image. FIG. 3 is a diagram illustrating the brightness of the red sub-pixel when the display panel switches from the black state to the target image. FIG. 4 is a diagram illustrating the brightness of the blue sub-pixel when the display panel switches from the black state to the target image.

As shown in fig. 1, when the display panel switches from the black state to the target picture, the luminance of the first frame picture (i.e. the luminance of the first frame) is lower than the desired target luminance value. Illustratively, the target picture may be a white picture, i.e., a 255 gray scale picture. As shown in fig. 2 to 4, the luminance of the red sub-pixel in the first frame substantially reaches the target luminance corresponding to the red sub-pixel, the luminance of the blue sub-pixel in the first frame also substantially reaches the target luminance corresponding to the blue sub-pixel, and only the luminance of the green sub-pixel in the first frame has a large deviation from the target luminance corresponding to the green sub-pixel, that is, the luminance of the green sub-pixel in the first frame substantially coincides with the trend of the luminance of the first frame of the display panel. That is, the luminance of the first frame of the display panel is lower than the target luminance value mainly because: the starting voltage of the green sub-pixel (or the green light emitting element) is high, and it takes a long time for the first frame to be charged to start, so that the brightness of the green sub-pixel is lower than the target brightness corresponding to the green sub-pixel, and the brightness of the first frame of the display panel is lowered as a whole.

In view of the above research by the inventors, the embodiments of the present application provide a display panel, a driving method thereof, and a display device, which can solve the technical problem of color shift/color shift of the display panel existing in the related art.

The technical idea of the embodiment of the application is as follows: compared with the prior art in which the gate of the first driving transistor and the anode of the first color light emitting element are reset by the same reset signal, the embodiment of the present application adds a second reset signal line on the basis of the first reset signal line for individually resetting the anode of the first color light emitting element, thereby, when resetting the anode of the first color light emitting element, whether the voltage value of the reset signal of the gate of the first drive transistor satisfies the data wipe requirement or not is not necessary to be considered, this provides the possibility to raise the voltage value of the reset signal for the anode of the first color light emitting element, therefore, the charging time of the first color light-emitting element can be shortened, the light-emitting brightness of the first color light-emitting element is improved, the color cast/color cast problem of the display panel during picture switching is improved and even eliminated, and the display effect of the display panel is improved.

The following first describes a display panel provided in an embodiment of the present application.

Fig. 5 is a circuit diagram of a display panel according to an embodiment of the present disclosure. As shown in fig. 5, the display panel 50 provided in the embodiment of the present application includes a first reset signal line Vref1, a second reset signal line Vref2, and a first color sub-pixel PX. The first color sub-pixel PX includes a first driving transistor M1 and a first color light emitting element D1, a first electrode of the first driving transistor M1 is electrically connected to an anode of the first color light emitting element D1, and the first driving transistor M1 is used to drive the first color light emitting element D1 to emit light. Wherein the first pole of the first driving transistor M1 includes the drain or source of the first driving transistor M1.

In the related art, the gate of the first driving transistor M1 and the anode of the first-color light-emitting element D1 are normally reset using the same reset signal line. Since the negative voltage required for the data erase voltage (i.e., the reset voltage of the gate of the first driving transistor M1) is smaller, the reset voltage of the anode of the first color light emitting element D1 is smaller, and the duration (i.e., the charging duration) for the first color light emitting element D1 to reach the lighting voltage in the first frame takes longer, so that the brightness of the first color light emitting element D1 in the first frame is lower, and the color shift/color shift of the display panel is more serious.

Unlike the related art, in the embodiment of the present application, the second reset signal line Vref2 is added to the first reset signal line Vref 1. A first reset signal line Vref1 is electrically connected to the gate of the first drive transistor M1 for supplying a first reset signal to the gate of the first drive transistor M1. The second reset signal line Vref2 is electrically connected to the anode of the first color light emitting element D1 for supplying a second reset signal, which has a voltage value different from that of the first reset signal, to the anode of the first color light emitting element D1.

Thus, the reset of the gate of the first driving transistor M1 and the reset of the anode of the first color light emitting element D1 can be independent of each other. When the anode of the first color light emitting element D1 is reset, it is not necessary to consider whether or not the voltage value of the reset signal of the gate of the first drive transistor M1 satisfies the data wipe requirement. Therefore, the reset voltage of the anode of the first color light emitting element D1 can be set to be larger than the original voltage value (such as the voltage value of the first reset signal line Vref 1), which provides a possibility for increasing the voltage value of the reset signal of the anode of the first color light emitting element D1, thereby shortening the charging time of the first color light emitting element D1, increasing the light emitting brightness of the first color light emitting element D1, improving or even eliminating the color cast/color cast problem of the display panel when the picture is switched, and increasing the display effect of the display panel.

With reference to the voltage value of the first reset signal line Vref1, according to some embodiments of the present application, the voltage value of the second reset signal Vref2 may optionally be greater than the voltage value of the first reset signal Vref 1. That is, the reset voltage of the anode of the first color light emitting element D1 may be greater than the reset voltage (data erase voltage) of the gate of the first driving transistor M1.

Assuming that the original reset voltage of the anode of the first color light emitting element D1 is-7V, the time period from-7V at the start of charging to the time when the first color light emitting element D1 reaches the turn-on voltage V1 is T1. And assuming that the current reset voltage of the anode of the first color light-emitting element D1 is-3V, the time period from-3V at the start of charging to the time when the first color light-emitting element D1 reaches the on-light voltage V1 is T2. Clearly, T2 < T1. That is, by increasing the voltage value of the reset signal of the anode of the first color light-emitting element D1, the charging duration of the first color light-emitting element D1 can be shortened, and the luminance of the first color light-emitting element D1 can be increased. It should be noted that the above-mentioned-7V and-3V are only illustrative and do not limit the embodiments of the present application.

In this way, in the embodiment of the present application, the second reset signal line Vref2 is added to the first reset signal line Vref1, the second reset signal line Vref2 is used to reset the anode of the first color light emitting element D1 alone, and the voltage value of the second reset signal is greater than that of the first reset signal, that is, by raising the voltage value of the reset signal of the anode of the first color light emitting element D1, the starting voltage of the anode terminal is raised, further, the charging period of the first color light emitting element D1 can be shortened when emitting light, and as the charging period of the first color light emitting element D1 is shortened, the proportion of the emitting period of the first color light emitting element D1 in one frame time is increased, therefore, the light-emitting brightness of the first color light-emitting element D1 is improved, the color cast/color cast problem of the display panel during the picture switching is improved or even eliminated, and the display effect of the display panel is improved.

As shown in fig. 6, it is easily understood that the display panel 50 may further include a second color sub-pixel PX ', which may include a second driving transistor M1' and a second color light emitting element D2, a first electrode of the second driving transistor M1 'being electrically connected to an anode of the second color light emitting element D2, and a second driving transistor M1' for driving the second color light emitting element D2 to emit light. Wherein the first pole of the second driving transistor M1 'includes the source or the drain of the second driving transistor M1'.

The inventors of the present application further found that, when the second color light emitting element D2 and the first color light emitting element D1 are reset by a reset signal having the same voltage value, since the on-voltage of the second color light emitting element D2 is smaller than the on-voltage of the first color light emitting element D1, the second color light emitting element D2 is more easily turned on (emits light), which may cause a problem that the second color light emitting element D2 cannot be turned off and still emits light weakly when the display panel displays a black screen, that is, a problem that the black screen is not black.

Taking the second color light emitting device D2 as a red light emitting device as an example, if the voltage of the second reset signal is simply increased, the red light emitting device and the first color light emitting device D1 both adopt a reset signal with a higher voltage. Then, since the turn-on voltage of the red light emitting element is small and the voltage after the anode of the red light emitting element is reset is high, the red light emitting element is easily turned on (i.e., emits light) in the case where the second driving transistor M1' leaks current to the anode of the red light emitting element. Thus, when the display panel displays a black screen, the red light-emitting element cannot be completely turned off and still emits light very weakly, so that the black screen is not blackened.

In view of the above findings, the inventors of the present application considered that the reset voltage of the anode of the second color light emitting element D2 is made different from the reset voltage of the anode of the first color light emitting element D1, for example, the reset voltage of the anode of the first color light emitting element D1 is made higher, so that the charging time period of the first color light emitting element D1 is shortened at the time of light emission, the luminance of the first color light emitting element D1 is improved, and the reset voltage of the anode of the second color light emitting element D2 is made lower, so as to avoid the problem that the black screen is not black.

Specifically, as shown in fig. 6, the display panel may further include a third reset signal line Vref 3. The first reset signal line Vref1 is also electrically connected to the gate of the second drive transistor M1 ', and the first reset signal line Vref1 is also used to supply a first reset signal to the gate of the second drive transistor M1'. The third reset signal line Vref3 is electrically connected to the anode of the second color light emitting element D2, and the third reset signal line Vref3 is used to supply a third reset signal, which has a voltage value different from that of the second reset signal, to the anode of the second color light emitting element D2.

In this way, in the embodiment of the present application, the third reset signal line Vref3 is additionally provided for resetting the anode of the second color light emitting element, and the voltage value of the third reset signal is different from the voltage value of the second reset signal, so that on one hand, the anode of the first color light emitting element can be reset based on the second reset signal, the charging duration of the first color light emitting element D1 is shortened, the light emitting brightness of the first color light emitting element is improved, and the color cast/color cast problem of the display panel during switching the picture is improved or even eliminated; on the other hand, the anode of the second color light emitting element can be reset based on the third reset signal, so that the possibility is provided for reducing the voltage of the anode of the second color light emitting element and further closing the second color light emitting element during the black picture, the second color light emitting element is difficult to turn on, the second color light emitting element cannot emit light due to leakage current, and the problem that the black picture is not black is avoided.

As described above, the lighting voltage of the first color light emitting element D1 may be higher than the lighting voltage of the second color light emitting element D2. Accordingly, in some specific embodiments, optionally, the voltage value of the second reset signal may be greater than the voltage value of the third reset signal. That is, the voltage value of the second reset signal is high, so that the reset voltage of the anode of the first color light emitting element D1 is high, thereby increasing the luminance of the first color light emitting element D1. The voltage value of the third reset signal is low, so that the reset voltage of the anode of the second color light emitting element D2 is low, thereby avoiding the problem that the black picture is not black.

In this way, since the voltage value of the second reset signal is greater than the voltage value of the third reset signal, on one hand, the anode of the first color light emitting element can be reset based on the second reset signal with a higher voltage value, so as to shorten the charging time of the first color light emitting element D1, improve the light emitting brightness of the first color light emitting element, and improve or even eliminate the color cast/color cast problem of the display panel when switching the picture; on the other hand, the anode of the second color light emitting element can be reset based on a third reset signal with a smaller voltage value than the second reset signal, so that the voltage of the anode of the second color light emitting element is reduced, the second color light emitting element is difficult to turn on, the second color light emitting element cannot emit light due to leakage current, the second color light emitting element is turned off during a black picture, and the problem that the black picture is not black is solved.

In some specific embodiments, optionally, the first color light emitting element D1 may include a green light emitting element, and the second color light emitting element D2 may include any one of a red light emitting element and a blue light emitting element. That is, in some examples, the second color light emitting element D2 may be only a red light emitting element. In other examples, the second color light emitting element D2 may be only a blue color light emitting element.

Therefore, on one hand, the anode of the green light-emitting element can be reset based on the second reset signal, the charging time of the green light-emitting element is shortened, the light-emitting brightness of the green light-emitting element is improved, and the color cast/color cast problem of the display panel during picture switching is improved and even eliminated; on the other hand, the anode of the red light emitting element or the anode of the blue light emitting element may be reset based on a third reset signal having a smaller voltage value than the second reset signal, so as to reduce the voltage of the anode of the red light emitting element or the blue light emitting element, and further turn off the red light emitting element or the blue light emitting element during a black screen, so as to solve the problem that the black screen is not black.

In the case where the second color light emitting element includes two color light emitting elements, considering that there may be a difference in the turn-on voltages of different ones of the second color light emitting elements, so as to further enhance the display effect of the display panel, as shown in fig. 7, according to some embodiments of the present application, the display panel may further include a fourth reset signal line Vref4 and a third color sub-pixel PX 3. The third color sub-pixel PX3 includes a third driving transistor M3 and a third color light emitting element D3, a first pole of the third driving transistor M3 is electrically connected to an anode of the third color light emitting element D3, and the third driving transistor M3 is used to drive the third color light emitting element to emit light. The first reset signal line Vref1 may also be electrically connected to the gate of the third drive transistor M3, and the first reset signal line Vref1 is used to supply a first reset signal to the gate of the third drive transistor M3. The fourth reset signal line Vref4 is electrically connected to the anode of the third color light emitting element D3, and the fourth reset signal line Vref4 is used to supply a fourth reset signal to the anode of the third color light emitting element D3. The voltage value of the fourth reset signal may be different from the voltage values of the second reset signal and the third reset signal. For example, the voltage value of the fourth reset signal may be smaller than the voltage value of the second reset signal.

Therefore, considering that the lighting voltages of the second color light-emitting element and the third color light-emitting element are possibly different, different reset signal lines are adopted to respectively reset the second color light-emitting element and the third color light-emitting element, so that the second color light-emitting element and the third color light-emitting element can be ensured to be turned off in the black picture, the second color light-emitting element and the third color light-emitting element are difficult to light, the second color light-emitting element and the third color light-emitting element cannot emit light due to leakage current, the problem that the black picture is not black is solved, and the color cast/color cast problem that the lighting durations of the different color light-emitting elements are not consistent is solved.

It should be noted that the second color sub-pixel may be a red sub-pixel, and the third color sub-pixel may be a blue sub-pixel. Alternatively, the second color sub-pixel may be a blue sub-pixel and the third color sub-pixel may be a red sub-pixel. The first color sub-pixel, the second color sub-pixel, and the third color sub-pixel may constitute one pixel unit. Further, in other embodiments, the anode of the third color light emitting element D3 may not be electrically connected to the fourth reset signal line Vref4, but electrically connected to the third reset signal line Vref3, that is, the anode of the third color light emitting element D3 may be reset based on the third reset signal supplied from the third reset signal line Vref 3.

It is further found by the inventor of the present application that, as shown in fig. 8, since the data signal line data is closer to the gate of the first driving transistor M1 (i.e., the first node N1), a coupling capacitance is formed between the data signal line data and the gate of the first driving transistor M1. The potential change on the data signal line data affects the potential of the gate of the first driving transistor M1 through the coupling capacitor, for example, when the level of the data signal transmitted through the data signal line data jumps low (switches from high level to low level), the potential of the gate of the first driving transistor M1 is pulled low by the coupling effect of the coupling capacitor. When the potential of the gate of the first driving transistor M1 is pulled low due to the influence of the characteristics of the transistors, the conduction degree of the first driving transistor M1 increases, and the current flowing between the source and the drain of the first driving transistor M1 increases.

In view of the above findings, the inventor of the present application considers that when the display panel displays a picture, the level of the data signal transmitted by the data signal line data is made to jump low, so as to pull down the potential of the gate of the first driving transistor M1, increase the current flowing between the source and the drain of the first driving transistor M1, further shorten the charging time of the first color light emitting element, and increase the light emitting brightness of the first color light emitting element, so as to improve or even eliminate the color cast/color cast problem of the display panel when the picture is switched.

Specifically, with continued reference to fig. 8, in some specific embodiments, the display panel 50 may further include a data signal line data electrically connected with the first color subpixel PX. The first color sub-pixel PX may include a data writing transistor M2, a gate of the data writing transistor M2 is electrically connected to the scan signal line S, a first pole of the data writing transistor M2 is electrically connected to the data signal line data, and a second pole of the data writing transistor M2 is electrically connected to the first node N1. That is, the data signal line data may be electrically connected to the first pole of the data writing transistor M2 for writing the data signal.

As shown in fig. 9, a period in which the display panel 50 displays one frame of picture may be divided into a first section Q1 and a second section Q2, and a duration of the first section Q1 may be less than a duration of the second section Q2. Both the first interval Q1 and the second interval Q2 can be understood as time intervals (i.e., time periods). The first interval Q1 can be referred to as a Blank interval (or Blank interval), and the second interval Q2 can be referred to as an Active interval (or Active interval). Generally, the actual data write operation is completed in the second interval Q2, with the first interval Q1 as a preparation phase. Taking the display panel 50 displaying one frame of picture with a period of 16.6ms as an example, for example, the duration of the first section Q1 is 0.6ms, and the duration of the second section Q2 is 16 ms. It should be noted that the above 16.6ms, 0.6ms, and 16ms are only illustrative and do not limit the embodiments of the present application. The TE signal is a trigger signal.

In the first section Q1, the data signal line data is normally in a high impedance state, and the data signal line data does not transmit a data signal. However, unlike the related art, in some embodiments of the present application, optionally, in the first section Q1, the data signal line data provides the first data signal to the first color sub-pixel; in the second section Q2, the data signal line data supplies the second data signal to the first color sub-pixel; the voltage value of the first data signal is smaller than that of the second data signal. That is, in the second section Q2, the data signal line data supplies the second data signal to the first color sub-pixel, ensuring normal data writing. In the first interval Q1, the data signal line data provides the first color sub-pixel with the first data signal with a lower voltage value, so that the potential on the data signal line data goes low.

In this way, in the embodiment of the application, the data signal line data transmits the first data signal in the first section Q1, and since the voltage value of the first data signal is smaller than that of the second data signal, the potential of the data signal line data will jump low in the first section, and further, under the coupling effect of the coupling capacitor between the data signal line data and the gate of the first driving transistor M1, the potential of the gate of the first driving transistor M1 will be pulled low, so that the current flowing between the source and the drain of the first driving transistor M1 is increased, the charging duration of the first color light emitting element is further shortened, the light emitting luminance of the first color light emitting element is increased, the color cast/color cast problem of the display panel during switching the image is improved and even eliminated, and the display effect of the display panel is improved.

With continued reference to fig. 9, in some particular embodiments, the first interval Q1 may optionally include a first sub-interval Q11 and a second sub-interval Q12, the first sub-interval Q11 being separated from the second sub-interval Q12 by a second interval Q2. That is, the first sub-interval Q11 is located at the beginning of each frame, and the second sub-interval Q12 is located at the end of each frame.

In some specific embodiments, optionally, the voltage value of the first data signal is 0V. That is, in the first section Q1, the driver chip may transmit a first data signal (e.g., a GND voltage signal) to the data signal line data, where the voltage value of the GND voltage signal is 0V.

The reason why the first data signal of 0V is transmitted to the data signal line data in the embodiment of the present application is mainly because: due to the limitation of the output channel and the output capability of the driving chip, the driving chip can only output 0V to the maximum extent at present.

Therefore, the voltage value of the first data signal is 0V, which can make the potential of the data signal line jump to the lowest, i.e. the potential variation degree of the data signal line reaches the maximum, thereby increasing the current flowing between the source and the drain of the first driving transistor to a greater extent, shortening the charging duration of the first color light emitting element, improving the light emitting brightness of the first color light emitting element, and improving or even eliminating the color cast/color cast problem of the display panel when switching the picture.

According to some embodiments of the present application, optionally, when any one of the first to nth frames is displayed on the display panel, the first reset signal line Vref1 provides the first reset signal to the gate of the first driving transistor, the second reset signal line Vref2 provides the second reset signal to the anode of the first color light emitting element, and n is an integer greater than or equal to 1.

It should be noted that n may be equal to 1. When n is 1, that is, only when the first frame is displayed, a dual Vref scheme is adopted to enhance the luminance of the first color light emitting device in the first frame (first frame), improve or even eliminate the color cast/cast problem of the display panel when the first frame is switched, and enhance the display effect of the display panel.

Of course, in some specific examples, n may alternatively be greater than 1. That is, the dual Vref scheme is adopted for displaying the first frame to the nth frame. Therefore, on one hand, when the first frame of picture is displayed, the second reset signal is provided for the anode of the first color light-emitting element through the second reset signal line, so that the luminance of the first color light-emitting element when the first frame of picture is displayed can be improved, the color cast/color cast problem of the display panel when the first frame of picture is switched can be improved and even eliminated, and the display effect of the display panel can be improved; on the other hand, as shown in fig. 1, in each frame subsequent to the first frame, the second reset signal is also provided to the anode of the first color light emitting element through the second reset signal line, so that the reset degrees of the anodes of the first color light emitting elements in different frames are the same or similar, and the display panel has a better display effect.

In order to better understand the display panel and the first color sub-pixel in the display panel provided in the embodiments of the present application, a circuit structure in the first color sub-pixel is described below with reference to a pixel circuit diagram shown in fig. 10.

It should be noted that the pixel circuit shown in fig. 10 is only an exemplary circuit, and the pixel circuit in the first color sub-pixel in the embodiment of the present application may also adopt other circuit structures, which is not limited in the embodiment of the present application. In addition, the circuit structure in the second color sub-pixel in the embodiment of the present application may be the same as the circuit structure in the first color sub-pixel, and for brevity of description, only the circuit structure in the first color sub-pixel is taken as an example for description.

As shown in fig. 10, according to some embodiments of the present application, optionally, the first color sub-pixel PX may further include a threshold compensation transistor M3, the threshold compensation transistor M3 may be a double-gate transistor, a first gate and a second gate of the threshold compensation transistor M3 are both electrically connected to the first scan signal line S1, a first gate of the threshold compensation transistor M3 is electrically connected to a gate of the first driving transistor M1, and a second gate of the threshold compensation transistor M3 is electrically connected to a first pole of the first driving transistor M1.

In this way, since the threshold compensation transistor M3 electrically connected to the gate of the first driving transistor M1 is a dual-gate transistor, and the degree of leakage current of the dual-gate transistor is small, the leakage current of the gate of the first driving transistor M1 can be reduced by using the dual-gate transistor, so as to ensure that a large current continuously flows between the source and the drain of the first driving transistor M1, which is beneficial to shortening the charging time of the first color light emitting element, improving the light emitting brightness of the first color light emitting element, improving or even eliminating the color cast/color cast problem of the display panel when switching the image, and further beneficial to ensuring the light emitting stability of the first color light emitting element.

With continued reference to fig. 10, according to some embodiments of the present application, optionally, the first color sub-pixel PX may further include a first reset transistor M4, the first reset transistor M4 may be a double-gate transistor, a first gate and a second gate of the first reset transistor M4 are both electrically connected to the second scan signal line S2, a first gate of the first reset transistor M4 is electrically connected to a gate of the first driving transistor M1, and a second gate of the first reset transistor M4 is electrically connected to the first reset signal line Vref 1.

In this way, since the first reset transistor M4 electrically connected to the gate of the first driving transistor M1 is a dual-gate transistor, and the degree of leakage current of the dual-gate transistor is small, the leakage current of the gate of the first driving transistor M1 can be reduced by using the dual-gate transistor, so as to ensure that a large current continuously flows between the source and the drain of the first driving transistor M1, which is beneficial to shortening the charging time of the first color light emitting device, improving the luminance of the first color light emitting device, improving or even eliminating the color cast/color cast problem of the display panel when switching the picture, and further beneficial to ensuring the stability of the light emission of the first color light emitting device.

With continuing reference to fig. 10, according to some embodiments of the present application, optionally, the first color sub-pixel PX may further include:

a data write transistor M2, a gate of the data write transistor M2 being electrically connected to the first scan signal line S1, a first pole of the data write transistor M2 being electrically connected to the data signal line data, and a second pole of the data write transistor M2 being electrically connected to the second pole of the first drive transistor M1;

a first light emission controlling transistor M5, a gate of the first light emission controlling transistor M5 being electrically connected to the light emission control signal line EM, a first pole of the first light emission controlling transistor M5 being electrically connected to the first power voltage signal line ELVDD, a second pole of the first light emission controlling transistor M5 being electrically connected to the second pole of the first driving transistor M1;

a second emission control transistor M6, a gate of the second emission control transistor M6 being electrically connected to the emission control signal line EM, a first pole of the second emission control transistor M6 being electrically connected to the first pole of the first driving transistor M1, a second pole of the second emission control transistor M6 being electrically connected to the anode of the first color light emitting element D1;

a second reset transistor M7, a gate of the second reset transistor M7 being electrically connected to the first scan signal line S1 (or the second scan signal line S2), a first pole of the second reset transistor M7 being electrically connected to an anode of the first color light emitting element D1, a second pole of the second reset transistor M7 being electrically connected to the second reset signal line Vref 2;

and a storage capacitor Cst, a first plate of which is electrically connected to the first power voltage signal line ELVDD, and a second plate of which is electrically connected to the anode of the first color light emitting element D1. In addition, the cathode of the first color light emitting element D1 may be electrically connected to the second power supply voltage signal line ELVSS.

Fig. 11 is a driving diagram of the pixel circuit shown in fig. 10. As shown in conjunction with fig. 10 and 11, each frame may include a reset phase t1, a data writing phase t2, and a light emitting phase t 3.

For example, in the reset phase t1, the first scan signal line S1 and the emission control signal line EM each output an off level, and the second scan signal line S2 outputs an on level. The first reset transistor M4 is turned on in response to the turn-on level of the second scan signal line S2, and a first reset signal transmitted by the first reset signal line Vref1 is transmitted to the gate of the first drive transistor M1 via the turned-on first reset transistor M4 to reset the gate of the first drive transistor M1 (i.e., the first node N1). The second reset transistor M7 is turned on in response to the on level of the second scan signal line S2, and a second reset signal transmitted by the second reset signal line Vref2 is transmitted to the anode of the first color light emitting element D1 to reset the anode of the first color light emitting element D1.

In the data writing phase t2, the second scan signal line S2 and the emission control signal line EM each output an off level, and the first scan signal line S1 outputs an on level. The data writing transistor M2 is turned on in response to the turn-on level of the first scan signal line S1, and writes the data signal transmitted through the data signal line data to the second pole of the first driving transistor M1. The threshold compensation transistor M3 is turned on in response to the on level of the first scan signal line S1, and connects the first electrode of the first driving transistor M1 and the gate of the first driving transistor M1, completing compensation of the threshold voltage of the first driving transistor M1. The storage capacitor Cst charges.

In the light emission period t3, the first scan signal line S1 and the second scan signal line S2 both output the off level, and the light emission control signal line EM outputs the on level. The storage capacitor Cst maintains the potential of the first node N1, and the first driving transistor M1 is turned on. The first and second light emission controlling transistors M5 and M6 are turned on in response to the turn-on level of the light emission control signal line EM, and the current supplied from the first power voltage signal line ELVDD is transmitted to the anode of the first color light emitting element D1 through the turned-on first light emission controlling transistor M5, the first driving transistor M1, and the second light emission controlling transistor M6 to drive the first color light emitting element D1 to emit light.

Based on the display panel 50 provided in the above embodiment, correspondingly, the embodiment of the present application further provides a driving method of the display panel. The display panel applied to the driving method of the display panel in the embodiment of the present application includes a first reset signal line, a second reset signal line, and a first color sub-pixel, where the first color sub-pixel includes a first driving transistor and a first color light emitting element, a first electrode of the first driving transistor is electrically connected to an anode of the first color light emitting element, and the first driving transistor is used for driving the first color light emitting element to emit light. The first reset signal line is electrically connected to the gate of the first driving transistor, and the second reset signal line is electrically connected to the anode of the first color light emitting element. It should be noted that the structure of the display panel applied in the driving method of the display panel in the embodiment of the present application is the same as the structure of the display panel 50 provided in the above embodiment, and for brevity of description, no further description is provided here.

As shown in fig. 12, the driving method of the display panel provided in the embodiment of the present application includes the following steps:

s101, a first reset signal is provided to the gate of the first driving transistor through the first reset signal line, and a second reset signal is provided to the anode of the first color light emitting element through the second reset signal line, where a voltage value of the second reset signal is different from a voltage value of the first reset signal.

Compared with the mode that the grid of the first driving transistor and the anode of the first color light-emitting element are reset by the same reset signal in the related art, the driving method of the display panel of the embodiment of the application are additionally provided with the second reset signal line on the basis of the first reset signal line and are used for resetting the anode of the first color light-emitting element independently, so that when the anode of the first color light-emitting element is reset, whether the voltage value of the reset signal of the grid of the first driving transistor meets the data wiping requirement or not is not considered, the possibility is provided for improving the voltage value of the reset signal of the anode of the first color light-emitting element, the charging duration of the first color light-emitting element can be further shortened, the light-emitting brightness of the first color light-emitting element is improved, and even the color cast/color cast problem of the display panel during the picture switching is improved and even eliminated, the display effect of the display panel is improved.

In some embodiments, the display panel further comprises a third reset signal line and a second color sub-pixel, the second color sub-pixel comprising a second driving transistor and a second color light emitting element, a first pole of the second driving transistor being electrically connected to an anode of the second color light emitting element for driving the second color light emitting element to emit light; the first reset signal line is also electrically connected with the grid electrode of the second driving transistor, and the third reset signal line is electrically connected with the anode of the second color light-emitting element; the method further comprises the following steps: a first reset signal is supplied to the gate of the second drive transistor through the first reset signal line, and a third reset signal having a voltage value different from that of the second reset signal is supplied to the anode of the second color light emitting element through the third reset signal line.

In some embodiments, the display panel further includes a data signal line electrically connected to the first color sub-pixel; the display panel is divided into a first interval and a second interval in the period of displaying one frame of picture, and the method further comprises the following steps: in a first interval, providing a first data signal to the first color sub-pixel through a data signal line; in a second interval, providing a second data signal to the first color sub-pixel through the data signal line; the duration of the first interval is less than the duration of the second interval, and the voltage value of the first data signal is less than the voltage value of the second data signal.

In some embodiments, the third reset signal line includes a first sub-reset signal line and a second sub-reset signal line; the second color sub-pixel comprises a first sub-color sub-pixel and a second sub-color sub-pixel, the first sub-color sub-pixel comprises a first sub-color light emitting element, and the second sub-color sub-pixel comprises a second sub-color light emitting element; the first sub-reset signal line is electrically connected with the anode of the first sub-color light emitting element, and the second sub-reset signal line is electrically connected with the anode of the second sub-color light emitting element; the method further comprises the following steps: and providing a first sub-reset signal to the anode of the first color light emitting element through the first sub-reset signal line, and providing a second sub-reset signal to the anode of the second color light emitting element through the second sub-reset signal line, wherein the voltage value of the first sub-reset signal is different from the voltage value of the second sub-reset signal.

It should be noted that, the structure of the display panel applied in the driving method of the display panel in the embodiment of the present application is the same as that of the display panel 50 provided in the above embodiment, and both have the same or corresponding technical features, and for brevity of description, no further description is provided here.

Based on the display panel 50 provided in the above embodiment, correspondingly, the present application further provides a display device, including the display panel 50 provided in the present application. Referring to fig. 13, fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present application. Fig. 13 provides a display device 1000 including the display panel 50 according to any of the above embodiments of the present application. In the embodiment of fig. 13, for example, a mobile phone is taken as an example to describe the display device 1000, it should be understood that the display device provided in the embodiment of the present application may be other display devices with a display function, such as wearable products, computers, televisions, and vehicle-mounted display devices, and the present application is not limited in this respect. The display device provided in the embodiment of the present application has the beneficial effects of the display panel 50 provided in the embodiment of the present application, and specific reference may be specifically made to the specific description of the display panel 50 in each of the above embodiments, which is not repeated herein.

In some specific embodiments, the display device 1000 optionally includes, but is not limited to, an Organic Light-Emitting Diode (OLED) display device. The display panel 50 includes, but is not limited to, an OLED display panel.

It should be understood that the specific structures of the pixel circuit and the layout structure of the display panel provided in the drawings of the embodiments of the present application are only some examples, and are not intended to limit the present application. In addition, the above embodiments provided by the present application may be combined with each other without contradiction.

In accordance with the embodiments of the present application as described above, these embodiments are not exhaustive of all of the details and are not intended to limit the application to the specific embodiments described. 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 its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel is characterized by comprising a first reset signal line, a second reset signal line and a first color sub-pixel, wherein the first color sub-pixel comprises a first driving transistor and a first color light-emitting element, a first pole of the first driving transistor is electrically connected with an anode of the first color light-emitting element, and the first driving transistor is used for driving the first color light-emitting element to emit light;

the first reset signal line is electrically connected with the grid electrode of the first driving transistor and is used for providing a first reset signal for the grid electrode of the first driving transistor; the second reset signal line is electrically connected to the anode of the first color light emitting element, and is configured to provide a second reset signal to the anode of the first color light emitting element, where a voltage value of the second reset signal is different from a voltage value of the first reset signal.

2. The display panel according to claim 1, further comprising a third reset signal line and a second color sub-pixel, wherein the second color sub-pixel comprises a second driving transistor and a second color light emitting element, and wherein a first electrode of the second driving transistor is electrically connected to an anode of the second color light emitting element for driving the second color light emitting element to emit light;

the first reset signal line is also electrically connected with the grid electrode of the second driving transistor and used for providing the first reset signal for the grid electrode of the second driving transistor; the third reset signal line is electrically connected to the anode of the second color light emitting element, and is configured to provide a third reset signal to the anode of the second color light emitting element, where a voltage value of the third reset signal is different from a voltage value of the second reset signal.

3. The display panel according to claim 2, wherein a lighting voltage of the first color light emitting element is higher than a lighting voltage of the second color light emitting element, and a voltage value of the second reset signal is larger than a voltage value of the third reset signal;

preferably, the first color light emitting elements comprise green light emitting elements and the second color light emitting elements comprise at least one of red light emitting elements and blue light emitting elements.

4. The display panel according to claim 1, further comprising a data signal line electrically connected to the first color sub-pixel;

the period of the display panel displaying a frame of picture is divided into a first interval and a second interval, and in the first interval, the data signal line provides a first data signal for the first color sub-pixel; in the second interval, the data signal line provides a second data signal to the first color sub-pixel; the duration of the first interval is less than that of the second interval, and the voltage value of the first data signal is less than that of the second data signal;

preferably, the first interval comprises a first sub-interval and a second sub-interval, the first sub-interval being separated from the second sub-interval by the second interval;

preferably, the voltage value of the first data signal is 0V.

5. The display panel according to claim 1, wherein a voltage value of the second reset signal is larger than a voltage value of the first reset signal.

6. The display panel according to claim 2, further comprising a fourth reset signal line and a third color sub-pixel, wherein the third color sub-pixel comprises a third driving transistor and a third color light emitting element, and wherein a first electrode of the third driving transistor is electrically connected to an anode of the third color light emitting element for driving the third color light emitting element to emit light;

the first reset signal line is also electrically connected with the grid electrode of the third driving transistor and is used for providing the first reset signal for the grid electrode of the third driving transistor; the fourth reset signal line is electrically connected to the anode of the third color light emitting element, and is configured to provide a fourth reset signal to the anode of the third color light emitting element, where a voltage value of the fourth reset signal is different from voltage values of the second reset signal and the third reset signal.

7. The display panel according to claim 1, wherein the display panel displays any one of a first frame to an nth frame, wherein the first reset signal lines each supply the first reset signal to a gate of the first driving transistor, wherein the second reset signal lines each supply the second reset signal to an anode of the first color light emitting element, and wherein n is not less than 1 and is an integer.

8. The display panel according to claim 1, wherein the first color sub-pixel further comprises a threshold compensation transistor, the threshold compensation transistor is a dual gate transistor, a first gate and a second gate of the threshold compensation transistor are both electrically connected to the first scan signal line, a first gate of the threshold compensation transistor is electrically connected to the gate of the first driving transistor, and a second gate of the threshold compensation transistor is electrically connected to the first gate of the first driving transistor.

9. The display panel is characterized by comprising a first reset signal line, a second reset signal line and a first color sub-pixel, wherein the first color sub-pixel comprises a first driving transistor and a first color light-emitting element, the first electrode of the first driving transistor is electrically connected with the anode of the first color light-emitting element, and the first driving transistor is used for driving the first color light-emitting element to emit light; the first reset signal line is electrically connected to a gate of the first driving transistor, and the second reset signal line is electrically connected to an anode of the first color light emitting element, the driving method including:

a first reset signal is supplied to the gate of the first driving transistor through the first reset signal line, and a second reset signal having a voltage value different from that of the first reset signal is supplied to the anode of the first color light emitting element through the second reset signal line.

10. A display device characterized by comprising the display panel according to any one of claims 1 to 8.