CN114743507B

CN114743507B - Display panel, driving method thereof and display device

Info

Publication number: CN114743507B
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: 2024-02-09
Anticipated expiration: 2042-04-28
Also published as: CN114743507A

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 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 with 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 display panel switches the pictures.

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 demands, the user has a higher and higher requirement on the display effect of the display panel. However, the inventors of the present application found that when the display panel is switched from the black state to the display screen, the display panel may have color shift/color shift, which results in poor display effect of the display panel.

Disclosure of Invention

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

In a first aspect, an embodiment of the present application provides a display panel, including 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 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 with 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 electrode of the second driving transistor is electrically connected to an anode of the second color light emitting element, and the second driving transistor is used for driving the second color light emitting element to emit light; the first reset signal line is also electrically connected with the gate electrode of the second driving transistor and is used for providing a first reset signal to the gate electrode of the second driving transistor, and the third reset signal line is electrically connected with the anode electrode of the second color light emitting element and is used for providing a third reset signal to the anode electrode 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 inventor of the present application further found that, when the second color light emitting element and the first color light emitting element are reset by adopting the reset signal with the same voltage value, since the on-state voltage of the second color light emitting element is smaller than the on-state voltage of the first color light emitting element, the second color light emitting element is easier to be turned on (light emitting), 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 picture, that is, the black picture is not black. In this way, in the embodiment of the present application, by adding the third reset signal line, the anode of the second color light emitting element is reset, where the voltage value of the third reset signal is different from the voltage value of the second reset signal, on one hand, the anode of the first color light emitting element may be reset based on the second reset signal, so as to 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 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 when a black picture is displayed.

According to any of the foregoing embodiments of the first aspect of the present application, the on-voltage of the first color light emitting element is higher than the on-voltage of the second color light emitting element, and the voltage value of the second reset signal is greater than the voltage value of the third reset signal.

In this way, in the embodiment of the present application, by adding the third reset signal line, the anode of the second color light emitting element is reset, where the voltage value of the third reset signal is different from the voltage value of the second reset signal, on one hand, the anode of the first color light emitting element may be reset based on the second reset signal, so as to 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 compared with 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 when a black picture is displayed, 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 element comprises a green light emitting element, and the second color light emitting element comprises at least one of a red light emitting element and a blue light emitting element.

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 shift/color shift problem of the display panel when the picture is switched 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 can be reset based on a third reset signal with a smaller voltage value compared with the second reset signal, so that the voltage of the anode of the red light-emitting element and/or the voltage of the blue light-emitting element are reduced, and the red light-emitting element and/or the blue light-emitting element are turned off when a black picture is displayed, so that the problem that the black picture is not black is solved.

According to any one of the foregoing embodiments of the first aspect of the present application, the display panel further includes a data signal line electrically connected to the first color sub-pixel; the display panel displays a frame of picture in a period divided into a first interval and a second interval, wherein in the first interval, a data signal line provides a first data signal for a first color sub-pixel; in a second interval, the data signal line supplies a second data signal to the first color sub-pixel; the duration of the first interval is smaller than that of the second interval, and the voltage value of the first data signal is smaller than that of the second data signal.

In this way, 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 jumps down in the first interval, and then 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 pulled down, so that the current flowing between the source and the drain of the first driving transistor 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 improved, the color shift/color shift problem of the display panel when the display panel is switched is improved, 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 first section includes a first subsection and a second subsection, and the first subsection and the second subsection are separated by the second section.

In this way, in the embodiment of the present application, the first data signal is transmitted by the data signal line through the beginning of each frame (the first subinterval) and the ending 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 multiple times, so that a larger current flows between the source and the drain of the first driving transistor 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 shift/color shift problem of the display panel when the screen is switched is improved or even eliminated, and the display effect of the display panel is improved.

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

The current driving chip can only output 0V to the greatest extent due to the limitation of the output channel and the output capability of the driving chip. In this way, the voltage value of the first data signal is 0V, so that the potential of the data signal line jumps to the lowest, that is, 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 shift/color cast problem of the display panel when the display panel switches pictures.

According to any of the foregoing 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, the voltage value of the second reset signal is larger than that of the first reset signal, namely, the voltage value of the reset signal of the anode of the first color light-emitting element is improved, 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 improved, the color cast/color cast problem of the display panel when the picture is switched is improved or 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 and is used for driving the third color light emitting element to emit light; the first reset signal line is also electrically connected with the gate of the third driving transistor and is used for providing a first reset signal for the gate of the third driving transistor; 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 for 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.

In this way, the lighting voltages of the second color light emitting element and the third color light emitting element are considered to be different, so that different reset signal lines are adopted to reset the second color light emitting element and the third color light emitting element respectively, and the different color light emitting elements can be ensured to be turned off when a black picture is displayed, so that the problem that the black picture is not black is solved, and meanwhile, the problem of color shift/color bias with inconsistent lighting time lengths of the different color light emitting elements is solved.

According to any one of the foregoing embodiments of the first aspect of the present application, any one of the first to nth frame of images 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, and the second reset signal lines each provide a second reset signal to the anode of the first color light emitting element, where n is greater than or equal to 1 and is an integer.

In this way, on the one hand, when the first frame 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 light-emitting brightness of the first color light-emitting element in the first frame picture can be improved, the color shift/color shift problem of the display panel in the process of switching the first frame picture is improved or even eliminated, and the display effect of the display panel is improved; on the other hand, in each frame of pictures which follow the first frame of pictures, a second reset signal is provided for the anode of the first color luminous element through a second reset signal line, so that the same or similar reset degree of the anode of the first color luminous element in different frame of pictures can be ensured, and the display panel is ensured to have a better display effect.

According to any one of the foregoing embodiments of the first aspect of the present application, the first color sub-pixel further includes 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 scan signal line, the first pole of the threshold compensation transistor is electrically connected to the gate of the first driving transistor, and the second pole of the threshold compensation transistor is electrically connected to the first pole of the first driving transistor.

In this way, the threshold compensation transistor electrically connected with the gate of the first driving transistor is a double-gate transistor, and the leakage current of the double-gate transistor is smaller, so that the leakage current of the gate of the first driving transistor can be reduced by adopting the double-gate transistor, the larger current continuously flows between the source and the drain of the first driving transistor is ensured, the charging duration of the first color light emitting element is shortened, the light emitting brightness of the first color light emitting element is improved, the color shift/color shift problem of the display panel when the picture is switched is improved or even eliminated, and the stability of the light emission of the first color light emitting element is ensured.

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

In a third aspect, embodiments of the present application provide a display device including a display panel as 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 gate of the first driving transistor and is used for providing a first reset signal for the gate of the first driving transistor, and the second reset signal line is electrically connected with the anode of the first color light emitting element and is 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 mode that the grid electrode of the first driving transistor and the anode of the first color light-emitting element are reset by adopting the same reset signal in the related art, the embodiment of the application is additionally provided with the second reset signal line on the basis of the first reset signal line and is used for independently resetting the anode of the first color light-emitting element, 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 electrode of the first driving transistor meets the data wiping requirement does not need to be 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 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 shift/color shift problem of the display panel when the picture is switched is improved 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 that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

FIG. 1 is a schematic diagram showing the brightness of a target frame when the display panel is switched from black to target frame;

FIG. 2 is a schematic diagram showing the brightness of the green sub-pixel when the display panel is switched from the black state to the target frame;

FIG. 3 is a schematic diagram showing the brightness of the red sub-pixel when the display panel is switched from the black state to the target frame;

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

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

fig. 6 is another schematic circuit 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 period diagram of a display panel displaying a frame of image 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 disclosure;

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

fig. 12 is a schematic flow chart of a driving method of a display panel according to an embodiment of the present application;

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 are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application 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 showing examples of the present 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.

The transistors in the embodiments of the present application are described by taking P-type transistors as examples, but the transistors are not limited to P-type transistors, and may be replaced by N-type transistors. For a P-type transistor, the on level is low and the off level is high. That is, when the control of the P-type transistor is at a very low level, the first pole and the second pole are turned on, and when the control of the P-type transistor is at a high level, the first pole and the second pole are turned off. For an N-type transistor, the on level is high and the off level is low. That is, the gate of the N-type transistor is on between the first and second poles when the gate is high, and is off between the first and second poles when the gate is low. 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 the embodiments herein, the term "electrically connected" may refer to two components being directly electrically connected, or may refer to two components being electrically connected via one or more other components.

Before describing the technical solution 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 describes a problem 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 have color shift/color shift, which results in a poor display effect of the display panel.

In order to solve the above technical problems, the inventors of the present application first studied and analyzed the root cause of the above technical problems, and the specific research and analysis procedures are as follows:

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

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

Fig. 1 is a schematic view of brightness of a target screen when the display panel is switched from a black state to the target screen. Fig. 2 is a schematic diagram showing the brightness of the green sub-pixel when the display panel is switched from the black state to the target picture. Fig. 3 is a schematic diagram showing the brightness of the red sub-pixel when the display panel is switched from the black state to the target picture. Fig. 4 is a schematic diagram showing the brightness of the blue sub-pixel when the display panel is switched from the black state to the target picture.

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

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

The technical conception of the embodiment of the application is as follows: compared with the mode that the grid electrode of the first driving transistor and the anode of the first color light-emitting element are reset by adopting the same reset signal in the related art, the embodiment of the application is additionally provided with the second reset signal line on the basis of the first reset signal line and is used for independently resetting the anode of the first color light-emitting element, 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 electrode of the first driving transistor meets the data wiping requirement does not need to be 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 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 shift/color shift problem of the display panel when the picture is switched is improved 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 schematic circuit diagram of a display panel according to an embodiment of the present application. 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 subpixel PX. The first color subpixel PX includes a first driving transistor M1 and a first color light emitting element D1, the first electrode of the first driving transistor M1 is electrically connected to the anode of the first color light emitting element D1, and the first driving transistor M1 is configured to drive the first color light emitting element D1 to emit light. Wherein the first pole of the first driving transistor M1 comprises 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 generally reset using the same reset signal line. Since the data erasing voltage (i.e. the reset voltage of the gate of the first driving transistor M1) needs a smaller negative voltage, the reset voltage of the anode of the first color light emitting element D1 is caused to be smaller, so that the duration (i.e. the charging duration) that the first color light emitting element D1 reaches the on-state voltage during the first frame needs longer, and therefore the brightness of the first color light emitting element D1 during the first frame is lower, and the color shift/color shift degree 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 on the basis of the first reset signal line Vref 1. The first reset signal line Vref1 is electrically connected to the gate of the first driving transistor M1 for supplying a first reset signal to the gate of the first driving transistor M1. The second reset signal line Vref2 is electrically connected to the anode of the first color light emitting element D1, and is configured to supply a second reset signal to the anode of the first color light emitting element D1, where a voltage value of the second reset signal is different from a voltage value of the first reset signal.

In this way, 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 from each other. In resetting the anode of the first color light emitting element D1, it is not necessary to consider whether or not the voltage value of the reset signal of the gate of the first driving transistor M1 satisfies the data wipe requirement. In this way, 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, so that the charging time of the first color light emitting element D1 can be shortened, the light emitting brightness of the first color light emitting element D1 can be increased, the color shift/color shift problem of the display panel when the screen is switched can be improved or even eliminated, and the display effect of the display panel can be improved.

Taking the voltage value of the first reset signal line Vref1 as a reference, according to some embodiments of the present application, optionally, the voltage value of the second reset signal Vref2 may 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 period from-7V at the start of charging to the first color light emitting element D1 reaching 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 period from-3V at the start of charging to the first color light emitting element D1 reaching the turn-on voltage V1 is T2. Obviously, 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 period of the first color light emitting element D1 can be shortened, and the light emission luminance of the first color light emitting element D1 can be further improved. 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, the second reset signal line Vref2 is added on the basis of 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 the voltage value 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, and then the charging time of the first color light emitting element D1 can be shortened when the light is emitted, and as the charging time of the first color light emitting element D1 is shortened, the duty ratio of the light emitting time of the first color light emitting element D1 in one frame time can be increased, thereby improving the light emitting brightness of the first color light emitting element D1, improving or even eliminating the color shift/color shift problem of the display panel when the screen is switched, and enhancing the display effect of the display panel.

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

The inventor 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 adopting the reset signal with 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 easier to be 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 picture, that is, a problem that the black picture is not black.

Taking the second color light emitting element D2 as a red light emitting element as an example, if the voltage value of the second reset signal is simply raised, the red light emitting element and the first color light emitting element D1 both adopt reset signals with higher voltage values. Then, since the 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 of the second driving transistor M1' leaking current to the anode of the red light emitting element. In this way, when the display panel displays a black screen, the red light emitting element cannot be completely turned off and emits light only weakly, so that the black screen is not black.

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 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 raised, and at the same time 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 picture is not black.

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

In this way, in the embodiment of the present application, by adding the third reset signal line Vref3, 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 shift/color shift problem of the display panel when 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 voltage of the anode of the second color light emitting element is reduced, and the second color light emitting element is turned off when a black picture is displayed, so that the second color light emitting element is difficult to turn on and light, and the second color light emitting element can not emit light due to leakage current, and the problem that the black picture is not black is avoided.

As described above, the on-luminance voltage of the first color light emitting element D1 may be higher than the on-luminance 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 higher, so that the reset voltage of the anode of the first color light emitting element D1 is higher, thereby increasing the brightness of the first color light emitting element D1. The voltage value of the third reset signal is lower, so that the reset voltage of the anode of the second color light emitting element D2 is lower, and the problem that the black picture is not black is avoided.

Therefore, since the voltage value of the second reset signal is larger than that 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 higher voltage value, the charging time 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 when the picture is switched is improved or 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 compared with 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 can not emit light due to leakage current, and the second color light-emitting element is turned off when a black picture is formed, so that the problem that the black picture is not black is solved.

In some specific embodiments, alternatively, 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 light emitting element.

Therefore, on one hand, the anode of the green light-emitting element can be reset based on the second reset signal, so that 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 shift/color shift problem of the display panel when the display panel is switched is improved or even eliminated; on the other hand, the anode of the red light-emitting element or the anode of the blue light-emitting element can be reset based on a third reset signal with a smaller voltage value compared with the second reset signal, so that the voltage of the anode of the red light-emitting element or the voltage of the blue light-emitting element are reduced, and the red light-emitting element or the blue light-emitting element is turned off when a black picture is displayed, so that the problem that the black picture is not black is solved.

In the case where the second color light emitting element includes two color light emitting elements, in consideration of that there may be a difference in the turn-on voltage of the different color light emitting elements in the second color light emitting element, in order to further enhance the display effect of the display panel, as shown in fig. 7, according to some embodiments of the present application, optionally, the display panel may further include a fourth reset signal line Vref4 and a third color subpixel PX3. The third color subpixel PX3 includes a third driving transistor M3 and a third color light emitting element D3, the first electrode of the third driving transistor M3 is electrically connected to the anode of the third color light emitting element D3, and the third driving transistor M3 is configured 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 driving transistor M3, and the first reset signal line Vref1 is used to supply a first reset signal to the gate of the third driving 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, the second color light-emitting element and the third color light-emitting element are reset by adopting different reset signal lines in consideration of the fact that the starting voltages of the second color light-emitting element and the third color light-emitting element are possibly different, so that the second color light-emitting element and the third color light-emitting element can be turned off when a black picture is ensured, the second color light-emitting element and the third color light-emitting element are difficult to start and light, the second color light-emitting element and the third color light-emitting element can not emit light due to leakage current, the problem that the black picture is not black is solved, and meanwhile, the problem of color shift/color bias with inconsistent light-emitting time lengths of the different color light-emitting elements 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 subpixel may be a blue subpixel and the third color subpixel may be a red subpixel. 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 may be electrically connected to the third reset signal line Vref3, i.e., 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.

The inventors of the present application further found that, as shown in fig. 8, since the distance between the data signal line data and the gate electrode of the first driving transistor M1 (i.e., the first node N1) is relatively close, a coupling capacitance is formed between the data signal line data and the gate electrode 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 capacitance, for example, when the data signal level transmitted by the data signal line data jumps down (switches from high level to low level), the potential of the gate of the first driving transistor M1 is pulled down by the coupling action of the coupling capacitance. When the potential of the gate of the first driving transistor M1 is pulled down, the turn-on degree of the first driving transistor M1 increases due to the influence of the transistor characteristics, and the current flowing between the source and the drain of the first driving transistor M1 increases.

In view of the above findings, the inventors of the present application consider that when the display panel displays a picture, the data signal level transmitted by the data signal line data is made to jump down, thereby pulling down the potential of the gate electrode of the first driving transistor M1, increasing the current flowing between the source and drain electrodes of the first driving transistor M1, further shortening the charging period of the first color light emitting element, and improving the light emission luminance of the first color light emitting element, so as to improve or even eliminate the color shift/color cast problem of the display panel when switching pictures.

In particular, with continued reference to fig. 8, in some particular embodiments, the display panel 50 may further include a data signal line data electrically connected to the first color subpixel PX. The first color subpixel PX may include a data writing transistor M2, the gate of the data writing transistor M2 is electrically connected to the scan signal line S, the first pole of the data writing transistor M2 is electrically connected to the data signal line data, and the 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 electrode of the data writing transistor M2 for writing the data signal.

As shown in fig. 9, the period in which the display panel 50 displays one frame of image may be divided into a first section Q1 and a second section Q2, and the duration of the first section Q1 may be smaller than the 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 section Q1 may be called a Blank section (or a Blank section), and the second section Q2 may be called an Active section (or an Active section). Generally, the actual data writing operation is completed in the second segment Q2, and the first segment Q1 is used as a preparation phase. Taking the period of 16.6ms for displaying one frame of image on the display panel 50 as an example, the duration of the first section Q1 is 0.6ms, and the duration of the second section Q2 is 16ms. It should be noted that the foregoing 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.

Normally, in the first section Q1, the data signal line data is in a high resistance 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 supplies the first data signal to the first color sub-pixel; in a second section Q2, the data signal line data supplies a second data signal to the first color sub-pixel; wherein the voltage value of the first data signal is smaller than the voltage value 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. And in the first section Q1, the data signal line data supplies a first data signal having a lower voltage value to the first color sub-pixel, so that the potential on the data signal line data jumps down.

In this way, in the embodiment of the present application, the data signal line data transmits the first data signal in the first interval 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 down in the first interval, and then 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 also be pulled down, so that the current flowing between the source and the drain of the first driving transistor M1 increases, 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 shift/color shift problem of the display panel when the display panel switches the screen is improved, 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 and the second sub-interval Q12 being separated by a second interval Q2. That is, the first subinterval Q11 is located at the beginning of each frame, and the second subinterval 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 the first data signal (for example, GND voltage signal) to the data signal line data, and the voltage value of the GND voltage signal is 0V.

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

Therefore, the voltage value of the first data signal is 0V, so that the potential of the data signal line can jump to the lowest, namely the potential variation degree of the data signal line is maximized, 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 shift/color cast problem of the display panel when the display panel switches pictures.

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

Note that n may be equal to 1. When n=1, that is, only when the first frame is displayed, a double Vref scheme is adopted to improve the light-emitting brightness of the first color light-emitting element in the first frame (first frame), improve or even eliminate the color shift/color shift problem of the display panel in the process of switching the first frame, and improve the display effect of the display panel.

Of course, in some specific examples, n may alternatively be greater than 1. That is, the double Vref scheme is adopted for displaying the first frame to the nth frame. In this way, on the one hand, when the first frame 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 light-emitting brightness of the first color light-emitting element in the first frame picture can be improved, the color shift/color shift problem of the display panel in the process of switching the first frame picture is improved or even eliminated, and the display effect of the display panel is improved; on the other hand, as shown in fig. 1, in each frame of the following frame of the first frame, the second reset signal is provided to the anode of the first color light emitting element through the second reset signal line, so that the same or similar reset degree of the anode of the first color light emitting element in different frames can be ensured, and the display panel is ensured to have 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, the circuit structure in the first color sub-pixel is described below with reference to the pixel circuit schematic diagram shown in fig. 10.

It should be noted that the pixel circuit shown in fig. 10 is only illustrative, and the pixel circuit in the first color sub-pixel of the embodiment of the present application may also have 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 simplicity of description, only the circuit structure in the first color sub-pixel is taken as an example for illustration.

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 dual gate transistor, the first gate and the second gate of the threshold compensation transistor M3 are electrically connected to the first scanning signal line S1, the first pole of the threshold compensation transistor M3 is electrically connected to the gate of the first driving transistor M1, and the second pole of the threshold compensation transistor M3 is electrically connected to the 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 double-gate transistor, and the leakage current of the double-gate transistor is small, the leakage current of the gate of the first driving transistor M1 can be reduced by adopting the double-gate transistor, so that a larger 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 shift/color shift problem of the display panel when switching the screen, and is beneficial to ensuring the stability of the light emission 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 subpixel PX may further include a first reset transistor M4, the first reset transistor M4 may be a dual gate transistor, the first gate and the second gate of the first reset transistor M4 are electrically connected to the second scan signal line S2, the first pole of the first reset transistor M4 is electrically connected to the gate of the first driving transistor M1, and the second pole 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 double-gate transistor, and the leakage current of the double-gate transistor is small, the leakage current of the gate of the first driving transistor M1 can be reduced by adopting the double-gate transistor, so that a larger current can continuously flow 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 and even eliminating the color shift/color shift problem of the display panel when switching the picture, and is beneficial to ensuring the stability of the light emission 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 subpixel PX may further include:

a data writing transistor M2, a gate of the data writing transistor M2 is electrically connected to the first scanning signal line S1, 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 a second pole of the first driving transistor M1;

a first light emitting control transistor M5, a gate electrode of the first light emitting control transistor M5 being electrically connected to the light emitting control signal line EM, a first electrode of the first light emitting control transistor M5 being electrically connected to the first power supply voltage signal line ELVDD, and a second electrode of the first light emitting control transistor M5 being electrically connected to a second electrode of the first driving transistor M1;

A second light emission control transistor M6, a gate electrode of the second light emission control transistor M6 is electrically connected to the light emission control signal line EM, a first electrode of the second light emission control transistor M6 is electrically connected to a first electrode of the first driving transistor M1, and a second electrode of the second light emission control transistor M6 is electrically connected to an anode electrode of the first color light emitting element D1;

a second reset transistor M7, a gate of the second reset transistor M7 is 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 is electrically connected to an anode of the first color light emitting element D1, and a second pole of the second reset transistor M7 is electrically connected to the second reset signal line Vref 2;

and a storage capacitor Cst, a first electrode plate of which is electrically connected to the first power voltage signal line ELVDD, and a second electrode plate of which is electrically connected to an anode of the first color light emitting element D1. Further, 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 schematic driving diagram of the pixel circuit shown in fig. 10. As shown in connection with fig. 10 and 11, each frame may include a reset phase t1, a data writing phase t2, and a light emitting phase t3.

For example, in the reset period 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 on level of the second scan signal line S2, and the first reset signal transmitted by the first reset signal line Vref1 is transmitted to the gate of the first driving transistor M1 through the turned-on first reset transistor M4 to reset the gate of the first driving 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 the 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 stage 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 on level of the first scan signal line S1, and writes the data signal transmitted by 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, thereby completing the 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 each output an off level, and the light emission control signal line EM outputs an 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 control 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 supply voltage signal line ELVDD is transmitted to the anode of the first color light emitting element D1 through the turned-on first light emission control transistor M5, the first driving transistor M1, and the second light emission control 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 application also 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 application includes a first reset signal line, a second reset signal line and a first color sub-pixel, wherein 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 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 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 that of the display panel 50 provided in the above embodiment, and for brevity of description, the description is omitted herein.

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 a grid electrode of a first driving transistor through a first reset signal line, a second reset signal is provided to an anode of a first color light emitting element through a second reset signal line, and the voltage value of the second reset signal is different from that of the first reset signal.

Compared with the mode that the grid electrode of the first driving transistor and the anode of the first color light emitting element are reset by adopting the same reset signal in the related art, the driving method of the display panel is characterized in that the second reset signal line is additionally arranged on the basis of the first reset signal line and used for independently resetting the anode of the first color light emitting element, 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 electrode of the first driving transistor meets the data wiping requirement does not need to be 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 time of the first color light emitting element can be shortened, the light emitting brightness of the first color light emitting element can be improved, the color shift/color shift problem of the display panel when the picture is switched can be improved, and the display effect of the display panel can be improved.

In some embodiments, the display panel further includes a third reset signal line and a second color sub-pixel including a second driving transistor and a second color light emitting element, a first electrode 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 electrode of the second color light emitting element; the method further comprises the steps of: the first reset signal is provided to the gate of the second driving transistor through the first reset signal line, and the third reset signal is provided to the anode of the second color light emitting element through the third reset signal line, wherein the voltage value of the third reset signal is different from the voltage value of the second reset signal.

In some embodiments, the display panel further includes a data signal line electrically connected to the first color subpixel; the period of the display panel for displaying a frame of picture is divided into a first interval and a second interval, and the method further comprises the following steps: providing a first data signal to the first color sub-pixel through the data signal line in a first section; providing a second data signal to the first color sub-pixel through the data signal line in a second interval; the duration of the first interval is smaller than that of the second interval, and the voltage value of the first data signal is smaller than that 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 includes a first sub-color sub-pixel including a first sub-color light emitting element and a second sub-color sub-pixel including 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 steps of: the first sub-reset signal is provided to the anode of the first color light emitting element through the first sub-reset signal line, and the second sub-reset signal is provided 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 the two have the same or corresponding technical features, so that the description is omitted herein for brevity.

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 a display panel 50 provided in any of the embodiments described above. The embodiment of fig. 13 is described with respect to the display device 1000 by taking a mobile phone as an example, 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 having a display function, which is not particularly limited in this application. 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 the specific description of the display panel 50 in the above embodiments may be referred to specifically, and the description of the embodiment is omitted herein.

In some specific embodiments, optionally, the display device 1000 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 circuits and the layout structures of the display panels provided in the drawings in the embodiments of the present application are only examples and are not intended to limit the present application. In addition, the above embodiments provided herein may be combined with each other without contradiction.

These embodiments are not all details described in detail in accordance with the embodiments described hereinabove, nor are they 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 invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. This application is to be limited only by the claims and the full scope and equivalents thereof.

Claims

1. A display panel, 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, 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 with the anode of the first color light-emitting element and is 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;

the display panel further comprises 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 a first electrode of the second driving transistor is electrically connected with an anode of the second color light emitting element and is used for driving the second color light emitting element to emit light;

the first reset signal line is also electrically connected with the gate of the second driving transistor and is used for providing the first reset signal for the gate of the second driving transistor; the third reset signal line is electrically connected with the anode of the second color light emitting element and is 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.

2. The display panel according to claim 1, wherein a turn-on voltage of the first color light emitting element is higher than a turn-on voltage of the second color light emitting element, and a voltage value of the second reset signal is greater than a voltage value of the third reset signal.

3. The display panel of claim 1, wherein the first color light emitting element comprises a green light emitting element and the second color light emitting element comprises at least one of a red light emitting element and a blue light emitting element.

4. The display panel of claim 1, further comprising a data signal line electrically connected to the first color subpixel;

the period of the display panel for 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 supplies a second data signal to the first color sub-pixel; the duration of the first interval is smaller than that of the second interval, and the voltage value of the first data signal is smaller than that of the second data signal.

5. The display panel of claim 4, wherein the first interval comprises a first sub-interval and a second sub-interval, the first sub-interval and the second sub-interval being separated by the second interval.

6. The display panel of claim 4, wherein the voltage value of the first data signal is 0V.

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

8. The display panel according to claim 1, further comprising a fourth reset signal line and a third color sub-pixel including a third driving transistor and a third color light emitting element, a first electrode of the third driving transistor being 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 gate of the third driving transistor and is used for providing the first reset signal for the gate of the third driving transistor; 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 for 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.

9. The display panel according to claim 1, wherein any one of a first frame to an n-th frame is displayed on the display panel, wherein the first reset signal lines each supply the first reset signal to the gate electrode of the first driving transistor, wherein the second reset signal lines each supply the second reset signal to the anode electrode of the first color light emitting element, and wherein n is equal to or larger than 1 and is an integer.

10. The display panel of claim 1, wherein the first color subpixel further comprises a threshold compensation transistor, the threshold compensation transistor being a dual gate transistor, the first gate and the second gate of the threshold compensation transistor each being electrically connected to a first scan signal line, the first pole of the threshold compensation transistor being electrically connected to the gate of the first drive transistor, the second pole of the threshold compensation transistor being electrically connected to the first pole of the first drive transistor.

11. A driving method of a display panel, 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, 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 gate electrode of the first driving transistor, the second reset signal line is electrically connected with the anode electrode of the first color light emitting element,

The driving method includes:

providing a first reset signal to the gate of the first driving transistor through the first reset signal line, and providing a second reset signal to the anode of the first color light emitting element through the second reset signal line, wherein the voltage value of the second reset signal is different from the voltage value of the first reset signal;

12. A display device comprising the display panel according to any one of claims 1 to 10.