CN117475907A

CN117475907A - Display panel and driving method thereof

Info

Publication number: CN117475907A
Application number: CN202310129367.2A
Authority: CN
Inventors: 乔振洋; 张留旗; 韩佰祥
Original assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2024-01-30

Abstract

The invention provides a display panel and a driving method thereof, wherein the display panel comprises a pixel driving circuit and a grid driving circuit, the pixel driving circuit comprises a plurality of rows of pixel driving unit rows, the grid driving circuit comprises a plurality of stages of grid driving units and at least one static image feedback unit, wherein each stage of grid driving unit is coupled with the corresponding pixel driving unit row and is configured to output scanning signals to the corresponding pixel driving unit row for control, the static image feedback unit is configured to receive feedback signals, and when the display panel needs to display static images, each stage of grid driving unit stops outputting the corresponding scanning signals through the feedback signals.

Description

Display panel and driving method thereof

Technical Field

The present invention relates generally to the field of display panel technology, and in particular, to a display panel and a driving method thereof.

Background

With the continuous development of electronic technology, more and more application scenes in life need to use a display panel, and based on this, how to ensure the reliability of devices in the display panel is a problem to be solved at present.

Disclosure of Invention

In order to solve the above problems or other problems, the present invention provides the following technical solutions.

In a first aspect, the present invention provides a display panel, the display panel comprising at least:

a pixel driving circuit including at least a plurality of pixel driving unit rows; the method comprises the steps of,

the grid driving circuit at least comprises a multistage grid driving unit and at least one still picture feedback unit, wherein the multistage grid driving unit and the at least one still picture feedback unit are arranged in a cascading mode, and the multistage grid driving unit comprises:

each stage of the gate driving unit is coupled with the corresponding pixel driving unit row and configured to output a scanning signal to the corresponding pixel driving unit row for control;

the still picture feedback unit is configured to receive a feedback signal and to stop the gate driving units of the respective stages from outputting the corresponding scan signal by the feedback signal when the display panel needs to display a still picture.

According to the display panel of the embodiment of the invention, each stage of the gate driving unit comprises a pull-up control module and a pull-up node coupled with the pull-up control module, the pull-up control module is configured to control the potential of the pull-up node according to a preset signal, and the gate driving unit outputs the scanning signal at least under the control of the potential of the pull-up node, wherein:

the pull-up control module is provided with a signal input end;

the still picture feedback unit is coupled to the signal input terminal and configured to access the preset signal.

According to the display panel of the embodiment of the invention, the preset signals at least comprise n-m-th level scanning signals and start signals, the multi-stage gate driving unit comprises an n-th level gate driving unit and 1-th level gate driving units to m-th level gate driving units, wherein n and m are integers greater than 0, n is greater than m, and wherein:

the pull-up control module of the nth stage gate driving unit controls the potential of the corresponding pull-up node at least according to the nth-m stage scanning signal;

the pull-up control modules of the 1 st stage gate driving unit to the m th stage gate driving unit control the potential of the corresponding pull-up node at least according to the start signal;

the number of the still picture feedback units is equal to m, and each of the still picture feedback units is coupled with one of the 1 st stage gate driving unit to the m th stage gate driving unit.

According to the display panel of the embodiment of the invention, the still picture feedback unit includes a first transistor, wherein:

the grid electrode of the first transistor is connected with the feedback signal, the source electrode of the first transistor is connected with the preset signal, and the drain electrode of the first transistor is coupled with the corresponding signal input end.

According to the display panel of the embodiment of the invention, each stage of the gate driving unit has a pull-up node, and the gate driving unit outputs the scan signal at least under the control of the potential of the pull-up node, wherein:

the number of the still picture feedback units is equal to the number of the gate driving units;

each of the still picture feedback units is coupled to the pull-up node of the corresponding gate driving unit.

the grid electrode of the first transistor is connected with the feedback signal, the source electrode of the first transistor is connected with a reference low-level signal, and the drain electrode of the first transistor is coupled with the pull-up node of the corresponding grid driving unit.

According to the display panel of the embodiment of the invention, each row of the pixel driving unit row comprises a plurality of pixel driving units, and each pixel driving unit comprises a storage circuit, wherein:

the storage circuit is configured to store a digital signal corresponding to the still picture when the display panel needs to display the still picture, and cause the corresponding pixel driving unit to cause the display panel to maintain displaying the still picture by maintaining the digital signal.

According to the display panel of the embodiment of the invention, the pixel driving circuit further comprises a digital-to-analog converter, wherein:

the digital-to-analog converter is configured to receive the digital signal and convert the digital signal into an analog signal to cause the display panel to display the still picture through the analog signal.

According to the display panel of the embodiment of the invention, the display panel further comprises a source driving chip, and the source driving chip is configured to provide the feedback signal.

In a second aspect, the present invention further provides a control method for a display panel, which is applied to any one of the display panels, wherein the display panel includes a source driving chip, each row of pixel driving units includes a plurality of pixel driving units, and each pixel driving unit includes a storage circuit, and the control method at least includes:

when the display panel needs to display the still picture, the storage circuit is caused to store a digital signal corresponding to the still picture; the method comprises the steps of,

the source driving chip is configured to output the feedback signal to the still picture feedback unit, so that the still picture feedback unit can stop the gate driving units at each stage from outputting the corresponding scanning signal through the feedback signal.

The beneficial effects of the invention are as follows: the invention provides a display panel and a driving method thereof, wherein the display panel at least comprises a pixel driving circuit and a grid driving circuit, the pixel driving circuit at least comprises a plurality of rows of pixel driving unit rows, the grid driving circuit at least comprises a plurality of stages of grid driving units and at least one static picture feedback unit which are arranged in a cascading way, wherein each stage of grid driving unit is coupled with the corresponding pixel driving unit row and is configured to output scanning signals to the corresponding pixel driving unit row for control, the static picture feedback unit is configured to receive the feedback signals, and when the display panel needs to display a static picture, each stage of grid driving unit stops outputting the corresponding scanning signals through the feedback signals.

Drawings

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

Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of one of the 1 st to m-th gate driving units according to the first embodiment of the present invention.

Fig. 3 is a schematic diagram of a pixel driving circuit according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an nth stage gate driving unit according to a second embodiment of the present invention.

Fig. 5 is a flowchart of a driving method of a display panel according to an embodiment of the invention.

Fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

An Organic Light-Emitting Diode (OLED) is also called an "Organic laser display" or "Organic Light-Emitting semiconductor", and has advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, high response speed, and the like, and thus is widely used in fields such as mobile phones, digital cameras, DVD players (Digital Video Disc, high-density digital video discs), notebook computers, televisions, and the like.

With the increase in display size and performance and higher consumer demand, higher performance thin film transistors (Thin Film Transistor, TFT) are required, such as high mobility oxide devices, however, with the increase in mobility of thin film transistors, the reliability thereof is reduced, and thus, higher demands are being made on the reliability of gate driving circuits requiring more thin film transistors.

Based on the above-mentioned problems, the present inventors have proposed a display panel and a driving method thereof as described below to solve at least the problem of reliability of the gate driving circuit thereof during operation of the display panel as described above.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel 100 according to a first embodiment of the present invention, and the components of the first embodiment of the present invention and the relative positional relationship of the components can be seen in a visual manner.

As shown in fig. 1, the display panel 100 includes at least a pixel driving circuit 110 and a gate driving circuit 120, the pixel driving circuit 110 includes at least a plurality of rows of pixel driving unit rows, fig. 1 specifically shows an n-m-th row of pixel driving unit rows 111 (n-m), an n-th row of pixel driving unit rows 111 (n), and an n+m-th row of pixel driving unit rows 111 (n+m), the gate driving circuit 120 includes at least a cascade-arranged multi-stage gate driving unit and a still picture feedback unit 122, and fig. 1 specifically shows an n-m-th stage gate driving unit 121 (n-m), an n-th stage gate driving unit 121 (n), and an n+m-th stage gate driving unit 121 (n+m) among the multi-stage gate driving units, wherein n and m are integers greater than 0 and n is greater than m. Next, each component in the display panel 100 will be described in detail with reference to fig. 1.

As shown in fig. 1, each stage of gate driving units is coupled to a corresponding pixel driving unit row and configured to output a scan signal to the corresponding pixel driving unit row for control. Specifically, the n-m-th stage gate driving unit 121 (n-m) is coupled to the n-m-th row pixel driving unit row 111 (n-m), and is configured to output the n-m-th stage scanning signal Gn-m to the n-m-th row pixel driving unit row 111 (n-m) for control; similarly, the nth stage gate driving unit 121 (n) is coupled to the nth row pixel driving unit row 111 (n) and configured to output an nth stage scanning signal Gn to the nth row pixel driving unit row 111 (n) for control; similarly, the n+m-th stage gate driving unit 121 (n+m) is coupled to the n+m-th row pixel driving unit row 111 (n+m), and is configured to output the n+m-th stage scanning signal gn+m to the n+m-th row pixel driving unit row 111 (n+m) for control.

The still picture feedback unit 122 is configured to receive the feedback signal SGL, and to stop outputting corresponding scan signals (e.g., gn-m, gn, gn+m, etc.) by the feedback signal SGL for each stage of gate driving units (e.g., the n-m-th stage gate driving unit 121 (n-m), the n-th stage gate driving unit 121 (n), the n+m-th stage gate driving unit 121 (n+m), etc.) when the display panel 100 needs to display a still picture.

It should be noted that, in the embodiment according to the present invention, by adding the still picture feedback unit 122 to the gate driving circuit 120, when the display panel 100 needs to display a still picture, a feedback signal SGL may be provided to the still picture feedback unit 122, so that, during the process of displaying the still picture on the display panel 100, each stage of gate driving units (such as the n-m-th stage gate driving unit 121 (n-m), the n-th stage gate driving unit 121 (n), and the n+m-th stage gate driving unit 121 (n+m)) in the gate driving circuit 120 may be controlled by the still picture feedback unit 122 (which is instructed by the feedback signal SGL) to stop the operation, that is, by reducing the operation time of the gate driving circuit 120, the embodiments of the present invention may reduce the stress applied to the gate driving circuit 120, thereby improving the reliability of the gate driving circuit 120.

Further, in the embodiment of the present invention, each stage of gate driving units located after the m-th stage of gate driving units outputs the stage of scanning signals under the control of the scanning signals outputted from the m-th stage of gate driving units before the stage, and the stage of scanning signals are supplied to the m-th stage of gate driving units after the stage in addition to the corresponding pixel driving unit row, so as to control the output of the corresponding scanning signals.

For example, in the example of fig. 1, the n-th stage gate driving unit 121 (n) located after the m-th stage gate driving unit outputs the scan signal Gn under the control of the scan signal Gn-m output from the n-th stage gate driving unit 121 (n-m), and the scan signal Gn is supplied to the n+m-th stage gate driving unit 121 (n+m) in addition to the n-th row pixel driving unit row 111 (n) to control the n+m-th stage gate driving unit 121 (n+m) to output the scan signal gn+m.

It should be noted that, the gate driving circuit 120 has N stages of gate driving units (specifically, from the 1 st stage), and the 1 st to m-th stage gate driving units are not present, so the start signal STV may be set in the m-stage gate driving units instead of the m-stage scanning signals (G1-m to G0) and will not be described herein.

Further, in the gate driving circuit 120, each stage of gate driving units (e.g., the n-m-th stage gate driving unit 121 (n-m), the n-th stage gate driving unit 121 (n), the n+m-th stage gate driving unit 121 (n+m), etc.) thereof includes a pull-up control module (e.g., the n-m-th stage pull-up control module 123 (n-m), the n-th stage pull-up control module 123 (n), the n+m-th stage pull-up control module 123 (n+m), etc.), and each stage of gate driving units has a pull-up node (e.g., the n-m-th stage pull-up node Q (n-m), the n-th stage pull-up node Q (n), the n+m-th stage pull-up node Q (n+m), etc.), which is configured to control the potential of the pull-up node according to a preset signal, and each stage of the gate driving unit is controlled by at least the potential of the corresponding pull-up node to output a scan signal.

Further, each of the pull-up control modules (e.g., the n-m-th stage pull-up control module 123 (n-m), the n-th stage pull-up control module 123 (n), the n+m-th stage pull-up control module 123 (n+m), etc.) has a corresponding signal input terminal (e.g., the n-m-th stage signal input terminal a (n-m), the n-th stage signal input terminal a (n), the n+m-th stage signal input terminal a (n+m), etc.).

Specifically, in the embodiment of the present invention, the preset signals at least include the start signal STV and the scan signals (such as Gn-m, gn, gn+m, etc.) received by the gate driving units of each stage from the gate driving units of m stages located before the stage.

It should be noted that, in some embodiments of the present invention, a number of still picture feedback units equal to the number of gate driving units may be provided, each of the still picture feedback units is coupled to a corresponding signal input terminal (e.g., n-m-th signal input terminal a (n-m), n-th signal input terminal a (n), n+m-th signal input terminal a (n+m), etc.), and the preset signal is connected to each stage of gate driving units through each of the still picture feedback units.

In these embodiments, when the display panel 100 needs to display a still picture, the feedback signal SGL received by each still picture feedback unit will be in an off state, so that the preset signal cannot be connected to the corresponding gate driving unit of each stage through each still picture feedback unit, so that the potential of the pull-up node (such as the n-m-th pull-up node Q (n-m), the n-th pull-up node Q (n), the n+m-th pull-up node Q (n+m), etc.) of each stage gate driving unit is low, and thus, the corresponding scan signal (such as Gn-m, gn, gn+m, etc.) cannot be output by each stage gate driving unit.

In order to further simplify the circuit structure, the inventor proposes that, in the gate driving circuit 110, since the pull-up control module in the 1 st stage gate driving unit to the m stage gate driving unit controls the potential of the corresponding pull-up node at least according to the start signal STV, and each stage gate driving unit (such as the n stage gate driving unit 121 (n)) located after the m stage gate driving unit controls the potential of the corresponding pull-up node (such as Q (n)) at least according to the scan signal (such as the n-m stage scan signal Gn-m) outputted from the m stage gate driving unit before the m stage, when the 1 st stage gate driving unit to the m stage gate driving unit cannot output the corresponding scan signal, each stage gate driving unit located after the m stage gate driving unit cannot output the corresponding scan signal, the inventor proposes that the still picture feedback unit is only provided in the 1 st stage gate driving unit to the m stage gate driving unit to achieve simplification of the circuit.

That is, in this embodiment, the number of still picture feedback units is equal to m, and each still picture feedback unit is correspondingly coupled to one of the 1 st to m th stage gate driving units.

Next, the operation principle of the 1 st stage gate driving unit 121 (1) will be described in detail with reference to a schematic structure of one of the 1 st stage gate driving unit to the m-th stage gate driving unit according to the first embodiment of the present invention shown in fig. 2, specifically, a schematic structure of the 1 st stage gate driving unit 121 (1).

As shown in fig. 2, the level 1 gate driving unit 121 (1) includes a level 1 pull-up control module 123 (1) and has a level 1 pull-up node Q (1), further, the level 1 pull-up control module 123 (1) has a level 1 signal input terminal a (1), the level 1 still picture feedback unit 122 (1) is coupled to the level 1 signal input terminal a (1), and the start signal STV is provided to the level 1 pull-up control module 123 (1) through the level 1 still picture feedback unit 122 (1) to control the potential of the level 1 pull-up node Q (1).

In the embodiment of the invention, each still picture feedback unit 122 includes a first transistor T1, wherein a gate of the first transistor T1 is connected to the feedback signal SGL, a source of the first transistor T1 is connected to the preset signal, and a drain of the first transistor T1 is coupled to the corresponding signal input terminal.

Specifically, in the stage 1 gate driving unit 121 (1), the gate of the first transistor T1 is connected to the feedback signal SGL, the source of the first transistor T1 is connected to the start signal STV, and the drain of the first transistor T1 is coupled to the stage 1 signal input terminal a (1).

It should be noted that, in the first embodiment of the present invention, when the display panel 100 needs to display a still picture, the feedback signal SGL provided by the display panel will cause the first transistor T1 to be in an off state (i.e. not be turned on), so that the start signal STV cannot be provided to the 1 st stage pull-up control module 123 (1) via the first transistor T1, so that the potential of the 1 st stage pull-up node Q (1) is at a low level, and therefore, the 1 st stage gate driving unit 121 (1) cannot output the 1 st stage scan signal G1 because the 1 st stage pull-up output module 124 (1) thereof is not turned on.

It should be understood that, when the display panel 100 needs to display a non-still picture (i.e., display a dynamic picture), the feedback signal SGL provided by it may cause the first transistor T1 to be in a conductive state, so that the start signal STV may be provided to the 1 st stage pull-up control module 123 (1) via the first transistor T1, such that the potential of the 1 st stage pull-up node Q (1) is at a high level, and thus, the 1 st stage gate driving unit 121 (1) may normally output the 1 st stage scan signal G1 due to the 1 st stage pull-up output module 124 (1) thereof being conductive.

In the embodiment of the present invention, the gate driving units of each stage may be an architecture shown in fig. 2, and the 1 st stage gate driving unit 121 (1) is taken as an example for illustration, specifically, the 1 st stage pull-up control module 123 (1) is formed by the second transistor T11, the 1 st stage pull-up output module 124 (1) is formed by the third transistor T21 and the first capacitor C1, the 1 st stage pull-down control module is formed by the fourth transistor T41, the fifth transistor T43 and the sixth transistor T44, the 1 st stage pull-down maintaining module is formed by the seventh transistor t51_1, the eighth transistor t51_2, the ninth transistor T52, the tenth transistor T53 and the eleventh transistor T54, and the 1 st stage pull-down output module is formed by the twelfth transistor T31.

It should be understood that in other embodiments according to the present invention, the gate driving units of each stage may have other structures, and the present invention is not limited thereto.

Further, in the embodiment of the present invention, when the display panel 100 displays a still picture, since each stage of gate driving units does not output a corresponding scanning signal to a corresponding pixel driving unit row to perform control, a memory circuit is required to be provided in the pixel driving circuit 110 to ensure that the pixel driving circuit 110 can operate normally in this case.

Referring to fig. 3, fig. 3 shows a schematic structural diagram of a pixel driving circuit 110 according to a first embodiment of the present invention, as shown in fig. 3, each row of pixel driving unit rows (fig. 3 specifically shows an n-1 row of pixel driving unit rows 111 (n-1), an n-1 row of pixel driving unit rows 111 (n), and an n+1 row of pixel driving unit rows 111 (n+1)) includes a plurality of pixel driving units (not labeled), each pixel driving unit includes a storage circuit 112, wherein the storage circuit 112 is configured to store a digital signal corresponding to a still picture when the display panel 100 needs to display the still picture, and to enable the corresponding pixel driving unit to enable the display panel 100 to maintain displaying the still picture by maintaining the digital signal.

Further, as shown in fig. 3, the pixel driving circuit 110 further includes a digital-to-analog converter 113 (D/a converter), wherein the digital-to-analog converter 113 is configured to receive a digital signal and convert the digital signal into an analog signal, so that the display panel 100 displays a still picture through the analog signal

Further, in an embodiment of the present invention, the display panel 100 further includes a Source driving chip (not shown, referred to as a "Source IC") configured to provide the feedback signal SGL described above.

Referring to fig. 4, fig. 4 is a schematic structural diagram of an nth stage gate driving unit 221 (n) according to a second embodiment of the present invention, and the components of the second embodiment of the present invention and the relative positional relationship of the components can be seen in a visual manner.

The second embodiment has substantially the same structure as the first embodiment, and is not described herein. The difference is that in the present embodiment, each stage of gate driving units has a pull-up node, and the gate driving units are controlled by at least the potential of the pull-up node to output the scan signal, wherein the number of the still picture feedback units is equal to the number of the gate driving units, and each still picture feedback unit is coupled to the pull-up node of the corresponding gate driving unit.

Further, in the second embodiment, each still picture feedback unit includes a first transistor T1, wherein a gate of the first transistor T1 is connected to the feedback signal SGL, a source of the first transistor T1 is connected to the reference low level signal VGL, and a drain of the first transistor T1 is coupled to a pull-up node of the corresponding gate driving unit.

Next, an n-th stage gate driving unit 221 (n) will be described as an example. As shown in fig. 4, the n-th stage gate driving unit 221 (n) has an n-th stage pull-up node Q (n), and when the potential of the n-th stage pull-up node Q (n) is at a high level, the n-th stage pull-up output module 224 (n) is turned on so that the n-th stage gate driving unit 221 (n) outputs the n-th stage scan signal Gn.

Further, when the display panel 100 needs to display a still picture, the feedback signal SGL provided thereto causes the first transistor T1 to be in an on state, and thus, the reference low level signal VGL is provided to the n-th stage pull-up node Q (n) via the first transistor T1, such that the potential of the n-th stage pull-up node Q (n) is low, and thus, the n-th stage gate driving unit 221 (n) cannot output the n-th stage scan signal Gn.

Next, referring to fig. 5, fig. 5 is a schematic flow chart of a driving method of the display panel 100 or the display panel 200 according to an embodiment of the invention, and as shown in fig. 5, the driving method may at least include the following steps:

storing step S101: when the display panel needs to display the still picture, the storage circuit is caused to store a digital signal corresponding to the still picture; the method comprises the steps of,

feedback step S102: the source electrode driving chip is configured to output a feedback signal to the still picture feedback unit, so that the still picture feedback unit can stop the gate electrode driving units at all levels from outputting corresponding scanning signals through the feedback signal.

According to the foregoing, the embodiments of the present invention provide a display panel and a driving method thereof, the display panel at least includes a pixel driving circuit and a gate driving circuit, the pixel driving circuit at least includes a plurality of rows of pixel driving units, the gate driving circuit at least includes a plurality of stages of gate driving units and at least one still picture feedback unit, which are disposed in cascade, wherein each stage of gate driving unit is coupled to a corresponding row of pixel driving units and configured to output a scanning signal to the corresponding row of pixel driving units for control, and the still picture feedback unit is configured to receive the feedback signal and stop the gate driving units of each stage from outputting the corresponding scanning signal through the feedback signal when the display panel needs to display a still picture.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a display device 500 according to an embodiment of the present invention, and the components of the embodiment according to the present invention and the relative positional relationship of the components can be seen in a visual manner.

As shown in fig. 6, the display device 500 includes a display panel 510, wherein the display panel 510 may be the display panel 100 described in the first embodiment, or may be the display panel 200 described in the second embodiment.

In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes adopting equivalent replacement or equivalent replacement fall within the protection scope of the invention.

In summary, although the preferred embodiments of the present invention have been described above, the above preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various modifications and adaptations without departing from the spirit and scope of the present invention, so that the scope of the present invention is defined by the claims.

Claims

1. A display panel, the display panel comprising at least:

2. The display panel according to claim 1, wherein each of the gate driving units includes a pull-up control module having a pull-up node coupled to the pull-up control module, the pull-up control module being configured to control a potential of the pull-up node according to a preset signal, the gate driving unit outputting the scan signal at least under control of the potential of the pull-up node, wherein:

the pull-up control module is provided with a signal input end;

3. The display panel according to claim 2, wherein the preset signal includes at least an n-m-th stage scan signal and a start signal, the multi-stage gate driving unit includes an n-th stage gate driving unit and 1-th stage gate driving units to an m-th stage gate driving unit, wherein n and m are integers greater than 0, n is greater than m, and wherein:

4. The display panel of claim 2, wherein the still picture feedback unit comprises a first transistor, wherein:

5. The display panel according to claim 1, wherein each of the gate driving units has a pull-up node, the gate driving unit outputting the scan signal under control of at least a potential of the pull-up node, wherein:

6. The display panel of claim 5, wherein the still picture feedback unit comprises a first transistor, wherein:

7. The display panel of claim 1, wherein each row of the pixel drive unit rows comprises a plurality of pixel drive units, each pixel drive unit comprising a storage circuit, wherein:

8. The display panel of claim 7, wherein the pixel drive circuit further comprises a digital-to-analog converter, wherein:

9. The display panel of claim 1, further comprising a source driver chip configured to provide the feedback signal.

10. A control method of a display panel according to any one of claims 1 to 9, wherein the display panel includes a source driving chip, each row of the pixel driving unit rows includes a plurality of pixel driving units, each pixel driving unit includes a memory circuit, the control method at least comprising: