Display panel driving method, driving circuit and display panel

Abstract

The present application discloses a display panel driving method, a driving circuit and a display panel, wherein the display panel driving method comprises the steps of: monitoring whether the display panel meets a preset refresh condition; if the preset refresh condition is met, driving all pixel electrodes in the display panel to be short-circuited by a refresh driving signal, and disconnecting after a first preset time. Driving all pixel electrodes in the display panel to be short-circuited by a refresh driving signal, and disconnecting after a first preset time, so that all pixel electrodes are at the same potential, and when the pixel electrodes are subsequently charged, the voltage error can be reduced, thereby improving the display uniformity of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel driving method, a driving circuit and a display panel. Background Art

[0002] The display of a traditional liquid crystal display panel or an electronic paper display panel is mainly achieved by generating an electric field between a pixel electrode and a common electrode, thereby driving the deflection of liquid crystal or the movement of charged particles, thereby realizing the display of a picture.

[0003] Among them, the pixel electrodes in the display panel are frequently charged and discharged, which may cause the voltage in the pixel electrodes to shift, resulting in a gap between the voltage required by the pixel electrodes and the actual voltage, resulting in uneven display of the display panel. Summary of the invention

[0004] The purpose of the present application is to provide a display panel driving method, a driving circuit and a display panel to ensure that pixel electrodes are at the same potential and improve the display uniformity of the display panel.

[0005] The present application discloses a method for driving a display panel, and the method for driving a display panel comprises the following steps:

[0006] Monitor whether the display panel meets the preset refresh conditions;

[0007] If the preset refresh condition is met, all pixel electrodes in the display panel are driven to be short-circuited by a refresh drive signal, and then disconnected after a first preset time.

[0008] Optionally, if the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be short-circuited by a refresh drive signal and then disconnected after a first preset time includes:

[0009] If the preset refresh condition is met, all pixel electrodes in the display panel are driven to be connected through the metal wires by the refresh drive signal, and the connection between all pixel electrodes in the display panel is disconnected after a first preset time.

[0010] Optionally, if the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be connected by a refresh drive signal, and disconnecting all pixel electrodes in the display panel after a first preset time includes:

[0011] If the preset refresh condition is met, all pixel electrodes in the display panel are driven to connect with the common electrode line through a refresh drive signal, and the connection between all pixel electrodes in the display panel and the common electrode line is disconnected after a first preset time.

[0012] Optionally, if the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be connected by a refresh drive signal, and disconnecting all pixel electrodes in the display panel after a first preset time includes:

[0013] If the preset refresh condition is met, all pixel electrodes in the display panel are driven to connect with the corresponding data lines or scan lines through a refresh drive signal, and the connection between all pixel electrodes in the display panel and the data lines or scan lines is disconnected after a first preset time.

[0014] Optionally, the display panel is a liquid crystal display panel, and the preset refresh condition is that the current picture is a static picture, and the static picture duration is 5-10 minutes;

[0015] If the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be short-circuited by a refresh drive signal and disconnected after a first preset time further includes:

[0016] The pixel electrode is recharged to maintain the display of the current picture.

[0017] Optionally, the display panel is an electronic paper display panel, and the preset refresh condition is screen switching;

[0018] If the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be short-circuited by a refresh drive signal and disconnected after a first preset time further includes:

[0019] The pixel electrode is charged with a data driving signal of the next frame to maintain the picture switching.

[0020] Optionally, the step of monitoring whether the display panel meets the preset refresh condition includes:

[0021] After the current frame ends and before the next frame begins, monitor whether the display panel meets the preset refresh condition;

[0022] If the preset refresh condition is met, the steps of driving all pixel electrodes in the display panel to be connected to the common electrode line by a refresh drive signal, and disconnecting the connection between all pixel electrodes in the display panel and the common electrode line after a first preset time include:

[0023] If the refresh preset conditions are met, all pixel electrodes in the display panel are driven to connect with the common electrode line through a refresh drive signal after the current frame ends and before the next frame begins, and the connection between all pixel electrodes in the display panel and the common electrode line is disconnected after a first preset time.

[0024] The present application also discloses a driving circuit, which includes a detection and judgment module, a refresh drive signal generating module and an equipotential control module. The detection and judgment module is used to judge whether the display panel meets the preset refresh conditions; the detection and judgment module is connected to the refresh drive signal generating module to control the refresh drive signal generating module to generate a refresh drive signal; the equipotential control module is respectively connected to the pixel electrode and the refresh drive signal generating module, and is used to receive the signal sent by the refresh drive signal generating module to control all pixel electrodes to be short-circuited.

[0025] The present application also discloses a display panel, the display panel includes an array substrate, the array substrate includes a first substrate, and data lines, scan lines, pixel electrodes, first active switches and second active switches arranged on the first substrate, the data lines and the scan lines are arranged in a crisscross manner to divide a plurality of pixel units, the first active switches, the second active switches and the pixel electrodes all correspond to the pixel units one by one, the gate of the first active switch is connected to the scan line, the source of the first active switch is connected to the data line, and the drain of the first active switch is connected to the pixel electrode;

[0026] The gate of the second active switch is used to receive a refresh drive signal, the source of the second active switch is connected to the pixel electrode, and the drain of each second active switch is connected.

[0027] Optionally, the display panel includes an array substrate and an opposing substrate that are arranged opposite to each other, the array substrate is arranged opposite to the opposing substrate, the opposing substrate includes a second substrate and a common electrode arranged on the second substrate, the common electrode is arranged opposite to the pixel electrode, and the array substrate further includes a common electrode line, the common electrode line is arranged on the first substrate, and the common electrode line is connected to the common electrode;

[0028] The drain of each of the second active switches is connected through the common electrode line.

[0029] Compared with the existing display panel, the frequent charging and discharging of the pixel electrodes in the display panel will cause the voltage of the pixel electrodes to shift, thereby causing the actual voltage of the pixel electrodes to change, resulting in inaccurate voltage during charging. Therefore, the present application drives all the pixel electrodes in the display panel to short-circuit by refreshing the driving signal, and disconnects them after a first preset time, so that the pixel electrodes on the entire display panel can maintain the same potential, avoid voltage deviation of the pixel electrodes, and improve the display uniformity of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] Figure 1 is a schematic diagram of a driving circuit according to an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of a display panel according to the first embodiment of the present application;

[0033] Figure 3 is a schematic diagram of a plane of a display panel according to the first embodiment of the present application;

[0034] Figure 4 This is a schematic diagram of the connection between a pixel electrode of a display panel and a common electrode line according to the second embodiment of the present application;

[0035] Figure 5 is a schematic diagram of connection between a pixel electrode of a display panel and a scan line according to a fourth embodiment of the present application;

[0036] Figure 6 is a schematic diagram of a third active switch connected to a scan line in a fourth embodiment of the present application;

[0037] Figure 7 is a schematic diagram of connection between a pixel electrode of a display panel and a data line according to a third embodiment of the present application;

[0038] Figure 8 is a schematic diagram of a fourth active switch in the third embodiment of the present application connecting adjacent data lines;

[0039] Fig. 9 is a schematic diagram of a method for driving a display panel according to an embodiment of the present application;

[0040] Fig.10 It is a schematic diagram of a timing of a refresh driving signal according to an embodiment of the present application.

[0041] Among them, 10, driving circuit; 20, detection and judgment module; 30, refresh driving signal generating module; 40, equipotential control module; 50, display panel; 100, array substrate; 110, first substrate; 120, data line; 130, scanning line; 140, pixel electrode; 150, first active switch; 160, second active switch; 170, common electrode line; 180, metal line; 200, opposing substrate; 210, second substrate; 220, common electrode; H1, display time; H2, blanking time; 300, refresh driving signal; 400, gate driving signal, 500, third active switch. DETAILED DESCRIPTION

[0042] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0043] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "plurality" means two or more. The term "including" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may exist or be added.

[0044] In addition, terms indicating orientation or positional relationships, such as “center,” “lateral,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside,” are described based on the orientation or relative positional relationships shown in the accompanying drawings and are merely simplified descriptions for the convenience of describing the present application. They do not indicate that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present application.

[0045] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0047] Figure 1 is a schematic diagram of a driving circuit according to an embodiment of the present application, such as Figure 1 As shown, the present application discloses a driving circuit 10 , which includes a detection and judgment module 20 , a refresh driving signal generation module 30 and an equipotential control module 40 .

[0048] The detection and judgment module 20 is used to determine whether the display panel 50 meets the preset refresh conditions; the detection and judgment module 20 is connected to the refresh drive signal generation module 30 to control the refresh drive signal generation module 30 to generate a refresh drive signal; the equipotential control module 40 is respectively connected to the pixel electrode 140 and the refresh drive signal generation module 30, and is used to receive the signal sent by the refresh drive signal generation module 30 to control all pixel electrodes 140 to be short-circuited.

[0049] The present application determines whether the display panel 50 meets the preset refresh conditions through the detection and judgment module 20, and the preset refresh conditions include screen switching, still images and still image duration, etc. For example, when it is detected that the display panel 50 meets the preset refresh conditions, the refresh drive signal generation module 30 is controlled to generate a refresh drive signal. After receiving the refresh drive signal, the equipotential control module 40 controls all pixel electrodes 140 to be at the same potential, thereby ensuring the potential uniformity of the pixel electrode 140, and then ensuring the uniformity of the subsequent display panel 50 displaying the picture.

[0050] Of course, the user may also manually trigger the refresh drive signal generation module 30 to generate a refresh drive signal to control all pixel electrodes 140 to short-circuit.

[0051] The present application also discloses a display panel, wherein the gate of the second active switch 160 in the display panel 50 is used to receive the refresh drive signal generated by the refresh drive signal generating module 30. For the display panel 50, the present application provides the following design:

[0052] Figure 2 is a schematic diagram of a display panel according to the first embodiment of the present application, Figure 3 is a schematic diagram of a plane of a display panel of the first embodiment of the present application, such as Figure 2-3As shown, the present application discloses a display panel 50, which includes an array substrate 100, and the array substrate 100 includes a first substrate 110, and a data line 120, a scan line 130, a pixel electrode 140, a first active switch 150 and a second active switch 160 arranged on the first substrate 110, the data line 120 and the scan line 130 are arranged in a criss-cross manner to divide a plurality of pixel units, the first active switch 150, the second active switch 160 and the pixel electrode 140 all correspond to the pixel units one by one, the gate of the first active switch 150 is connected to the scan line 130, the source of the first active switch 150 is connected to the data line 120, and the drain of the first active switch 150 is connected to the pixel electrode 140.

[0053] The gate of the second active switch 160 is used to receive a refresh drive signal, the source of the second active switch 160 is connected to the pixel electrode 140, and the drain of each second active switch 160 is connected. The refresh drive signal can be generated inside the display panel 50 or outside the display panel 50, which is not limited here.

[0054] Compared with the existing display panel 50, due to the frequent charging and discharging of the pixel electrode 140 in the display panel 50, the voltage of the pixel electrode 140 will be offset, thereby causing the actual voltage of the pixel electrode to change, resulting in inaccurate voltage problems during charging. Therefore, the present application drives all the pixel electrodes 140 in the display panel 50 to short-circuit by refreshing the driving signal, and disconnects after a first preset time, so that the pixel electrodes 140 on the entire display panel 50 maintain the same potential, avoid voltage deviation of the pixel electrode 140, and improve the display uniformity of the display panel 50.

[0055] Figure 4 is a schematic diagram of a display panel pixel electrode and a common electrode line connected in accordance with a second embodiment of the present application, combined with Figure 2 and 4As shown, exemplarily, the present application explains by taking the example that the pixel electrode 140 is connected to the common electrode line through the second active switch 160, specifically: the display panel 50 includes an array substrate 100 and an opposing substrate 200 arranged opposite to each other, the array substrate 100 and the opposing substrate 200 are arranged opposite to each other, the opposing substrate 200 includes a second substrate 210 and a common electrode 220 arranged on the second substrate 210, the common electrode 220 is arranged opposite to the pixel electrode 140, the array substrate 100 also includes a common electrode line 170, the common electrode line 170 is arranged on the first substrate 110, and the common electrode line 170 is connected to the common electrode 220; the drain of each second active switch 160 is connected through the common electrode line 170.

[0056] Compared with the solution of adding a new metal line 180 and connecting the pixel electrode 140 to the newly added metal line 180 through the second active switch 160, the solution of connecting the pixel electrode 140 to the common electrode line 170 through the second active switch 160 does not require the addition of the metal line 180, and uses the original common electrode line 170, which is simpler and has lower cost; compared with the solution of connecting the pixel electrode 140 to the data line 120 or the scan line 130 through the second active switch 160, the solution of connecting the pixel electrode 140 to the common electrode line 170 through the second active switch 160 can ensure that the voltage difference between the pixel electrode 140 and the common electrode 220 is zero, thereby achieving complete discharge.

[0057] Figure 5 is a schematic diagram of a display panel pixel electrode and a scan line connected in a fourth embodiment of the present application, such as Figure 5 As shown, different from the first embodiment, in this embodiment, the pixel electrode 140 is connected to the scan line 130 through the second active switch 160. Specifically, the source of the second active switch 160 is connected to the pixel electrode 140, and the drain of the second active switch 160 is connected to the scan line 130. That is, the drain of each second active switch 160 is connected through the scan line 130. And the second active switches 160 corresponding to the same row of scan lines 130 are connected to the same scan line 130, that is, the drains of the second active switches 160 corresponding to the same row of pixel electrodes 140 are connected to the same row of scan lines 130.

[0058] Compared with the solution of the first embodiment, the solution of connecting the pixel electrode 140 to the scan line 130 through the second active switch 160 does not need to add a new metal line 180 and uses the original scan line 130 , which is simpler and has a lower cost.

[0059] Figure 6is a schematic diagram of a third active switch connected to a scan line in a fourth embodiment of the present application, such as Figure 6 As shown, when all the second active switches 160 in the display panel 50 are driven to open by the refresh drive signal, since the drain of the second active switch 160 corresponding to the pixel electrode 140 in the same row is connected to the scan line 130 in the same row, the pixel electrodes 140 in the same row can maintain the same potential, but it is difficult to ensure that the pixel electrodes 140 in different rows are at the same potential. Therefore, the present application uses a plurality of third active switches 500, and the source and drain of the third active 500 are respectively connected to two adjacent scan lines 130. The refresh drive signal drives all the third active switches 500 to open at the same time, ensuring that all the scan lines 130 of the entire display panel 50 maintain the same potential, so that the pixel electrodes 140 on the entire display panel 50 maintain the same potential, avoiding voltage deviation of the pixel electrodes 140, and improving the display uniformity of the display panel 50.

[0060] Figure 7 is a schematic diagram of the connection between a pixel electrode of a display panel and a data line in the third embodiment of the present application, such as Figure 7 As shown, different from the first embodiment, in this embodiment, the pixel electrode 140 is connected to the data line 120 through the second active switch. Specifically, the source of the second active switch 160 is connected to the pixel electrode 140, and the drain of the second active switch 160 is connected to the data line 120. And the second active switches 160 corresponding to the same column of data lines 120 are connected to the same data line 120. That is, the drain of each second active switch 160 is connected through the data line 120.

[0061] Compared with the solution of the first embodiment, the solution of connecting the pixel electrode 140 to the data line 120 through the second active switch 160 does not need to add a new metal line 180 and uses the original data line 120, which is simpler and has a lower cost.

[0062] Figure 8 is a schematic diagram of a fourth active switch connecting adjacent data lines in the third embodiment of the present application, such as Figure 8 As shown, when all the second active switches 160 in the display panel 50 are driven to open by the refresh drive signal, since the drains of the second active switches 160 corresponding to the pixel electrodes 140 in the same column are connected to the data lines 120 in the same column, the pixel electrodes 140 in the same column can maintain the same potential, but it is difficult to ensure that the pixel electrodes 140 in different columns are at the same potential. Therefore, the present application adds a plurality of fourth active switches 600, and the fourth active switches 600 connect two adjacent data lines 120.

[0063] The present application also discloses a method for driving a display panel 50. The method for driving the display panel 50 can be used in the driving circuit 10 described above. With respect to the method for driving the display panel 50, the present application provides the following design:

[0064] Fig. 9 is a schematic diagram of a method for driving a display panel according to an embodiment of the present application, such as Fig. 9 As shown, the present application discloses a driving method of a display panel 50, and the driving method of the display panel 50 includes the steps of:

[0065] S1: monitor whether the display panel meets the preset refresh conditions;

[0066] The refresh preset conditions include screen switching, still images, and still image duration, etc. In short, it is necessary to detect whether the display panel 50 is in a state of continuously refreshing different images, i.e., screen switching, or in a state of keeping one image displayed motionless, i.e., a still image. In the case of a still image, it is also necessary to monitor the duration of the still image.

[0067] S2: If the preset refresh condition is met, all pixel electrodes in the display panel are driven to be short-circuited by a refresh drive signal, and then disconnected after a first preset time.

[0068] Simply put, short-circuiting is connecting all the pixel electrodes 140 of the entire display panel 50 together so that the voltages of all the pixel electrodes 140 are the same. The first preset time can be adjusted according to the refresh rate of the display panel 50, etc. The first preset time needs to be less than the length of the blanking period of a frame. For example: the first preset time is set to h, the refresh rate of the current picture is 60hz, the resolution is 1080*1920, and the length of the blanking period of a frame is 80h, then (1000000 / 60-80h) / 1080=h, h is approximately equal to 14.4 microseconds.

[0069] Compared with the existing display panel 50, due to the frequent charging and discharging of the pixel electrode 140 in the display panel 50, the voltage of the pixel electrode 140 will be offset, thereby causing the actual voltage of 140 to change, resulting in inaccurate voltage during charging. Therefore, the present application drives all the pixel electrodes 140 in the display panel 50 to short-circuit by refreshing the driving signal, and disconnects after a first preset time, so that the pixel electrodes 140 on the entire display panel 50 can maintain the same potential, avoid voltage deviation of the pixel electrode 140, and improve the display uniformity of the display panel 50.

[0070] Combination Figure 2As shown, the step S2: if the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be short-circuited by a refresh drive signal and disconnecting after a first preset time comprises:

[0071] S21: If the preset refresh condition is met, all pixel electrodes in the display panel are driven to be connected through metal wires by a refresh drive signal, and the connection between all pixel electrodes in the display panel is disconnected after a first preset time.

[0072] That is, the method of controlling the short circuit of all the pixel electrodes 140 includes adding a new metal line 180 on the display panel 50, and adding a second active switch 160 corresponding to each pixel electrode 140, the refresh drive signal is connected to the gate of the second active switch 160, driving the second active switch 160 to open, the source of the second active switch 160 is connected to the corresponding pixel electrode 140, and the drain of the second active switch 160 is connected to the metal line 180. After the second active switch 160 is turned on, all the pixel electrodes 140 will be short-circuited together, so that the voltage of each pixel electrode 140 is the same, and by inputting a same-level voltage to the metal line 180, each pixel electrode 140 has a same-level voltage on the basis of the same voltage.

[0073] Of course, the metal line 180 may also be a metal line 180 provided in the display panel 50, such as a data line 120 or a scan line 130. Specifically:

[0074] The step S2: if the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be connected by a refresh drive signal, and disconnecting all pixel electrodes in the display panel after a first preset time comprises:

[0075] S22: If the preset refresh condition is met, all pixel electrodes in the display panel are driven to connect with the corresponding data lines or scan lines through a refresh drive signal, and the connection between all pixel electrodes in the display panel and the data lines or scan lines is disconnected after a first preset time.

[0076] Compared with the solution of adding a new metal line 180, by connecting the pixel electrodes 140 in the same row or column to the scan line 130 of the corresponding row or the data line 120 of the corresponding row through the second active switch 160, when the preset refresh condition is met, the second active switch 160 is turned on to short-circuit all the pixel electrodes 140 in the same row or column. At this time, all the data lines 120 or all the scan lines 130 output the same voltage, thereby maintaining the same potential. There is no need to add a new metal line 180, and the design of the display panel 50 is simpler and will not affect the aperture ratio of the display panel 50.

[0077] Further, combined with Figure 3 As shown, the pixel electrode 140 can also be connected to the common electrode line 170 through the second active switch 160. Since the common electrode line 170 is just below the pixel electrode 140, it is easier to connect. Specifically: S2: If the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to connect through the refresh drive signal, and disconnecting the connection between all pixel electrodes in the display panel after a first preset time includes:

[0078] S23: If the preset refresh condition is met, all pixel electrodes in the display panel are driven to connect with the common electrode line by a refresh drive signal, and the connection between all pixel electrodes in the display panel and the common electrode line is disconnected after a first preset time.

[0079] Since the common electrode 220 will be affected by other signals and cause the voltage to change during the display process, if the pixel electrode 140 is given a common electrode 220 voltage, that is, a Vcom voltage, the voltage difference between the pixel electrode 140 and the common electrode 220 is not necessarily zero, which will cause incomplete discharge. Compared with the solution of connecting all pixel electrodes 140 to the newly added metal line 180, by connecting all pixel electrodes 140 in the display panel 50 to the common electrode line 170, it can be ensured that the voltages of the pixel electrode 140 and the common electrode 220 are the same, and the voltage difference between the pixel electrode 140 and the common electrode 220 is zero, thereby ensuring complete discharge.

[0080] When the display panel 50 of the present application is a liquid crystal display panel 50 , the display panel 50 is a liquid crystal display panel 50 , and the preset refresh condition is that the current picture is a still picture and the still picture duration is 5-10 minutes.

[0081] For example: when the liquid crystal display panel 50 maintains a static picture A for a period of time, the picture A needs to be refreshed every frame, and when each frame of the picture A is refreshed, it is scanned line by line, and when the scan line of the current row is opened to charge the pixel electrode, the pixel electrode on the scan line of the next row will be discharged and then charged, resulting in a large load on the display panel.

[0082] The present application discharges all pixel electrodes of the display panel uniformly once when the static picture lasts for 5-10 minutes, flattens the potential, and then charges. It is not necessary to refresh the A picture in each frame. When the current line scans the line to charge the pixel electrode, the pixel electrode on the next line scans the line and then charges it again. Keeping the time at 5-10 minutes can avoid the problem of inaccurate display of the display screen caused by excessive accumulation of voltage offset generated by the pixel voltage when each frame is refreshed due to the static picture time being too long; it can also avoid the problem of inaccurate display of the display screen caused by the time being too short, which requires uniform discharge of all pixel electrodes of the display panel to flatten the potential, and the number of recharging increases, resulting in an insignificant effect of reducing the load.

[0083] The step S2: if the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be short-circuited by a refresh drive signal and disconnected after a first preset time further includes:

[0084] S31: recharging the pixel electrode to maintain the display of the current picture.

[0085] That is, when the display panel 50 is a liquid crystal display panel 50, the solution of the present application is applicable to the situation when the liquid crystal display panel 50 is in a static picture for a long time. For example, after the detection and judgment module 20 monitors that the display panel 50 maintains a static picture for 5-10 minutes, it will control the refresh drive signal generation module 30 to generate a refresh drive signal to control the equipotential control module 40, that is, the second active switch 160, so that all pixel electrodes 140 are short-circuited. At this time, the voltage difference between the pixel electrode 140 and the common electrode 220 is zero. Then, the pixel electrode 140 is recharged to maintain the display of the current picture, thereby avoiding the distortion of the picture caused by the display panel 50 being in a static picture for a long time, and having a disturbing effect on the liquid crystal. When the picture is refreshed, the speed of liquid crystal displacement can also be guaranteed.

[0086] The solution of the present application is for the case where the type of the display panel 50 is an electronic paper display panel 50, specifically: the display panel 50 is an electronic paper display panel 50, the preset refresh condition is screen switching, and the step S23: if the preset refresh condition is met, driving all pixel electrodes in the display panel to connect with the common electrode line through a refresh drive signal, and disconnecting the connection between all pixel electrodes in the display panel and the common electrode line after a first preset time, further includes:

[0087] S32: charging the pixel electrode with a data driving signal of the next frame to maintain screen switching.

[0088] Compared with the existing electronic paper display panel 50 that needs to brush the entire screen black or white when refreshing the picture, the present application drives all pixel electrodes 140 in the display panel 50 to connect with the common electrode line 170 through a refresh drive signal when the electronic paper display panel 50 needs to display the next frame of the picture, and disconnects the connection between all pixel electrodes 140 in the display panel 50 and the common electrode line 170 after a first preset time, so that the voltage between the pixel electrode 140 and the common electrode 220 is zero, and then charges the pixel electrode 140 with the data drive signal of the next frame to keep the picture switching. Charging after discharging can ensure that the particles in the electronic paper display panel 50 move to the ideal position. By using the drive signal to drive all pixel electrodes in the display panel to connect with the common electrode line when switching the next frame of the picture, and disconnecting the connection between all pixel electrodes in the display panel and the common electrode line after a first preset time, it is possible to avoid brushing the entire screen black or white when refreshing the picture, thereby avoiding the electronic paper display panel 50 from having a full black or full white screen flashing phenomenon when refreshing the picture.

[0089] Fig.10 is a schematic diagram of a timing sequence of a refresh drive signal according to an embodiment of the present application, such as Fig.10 As shown, Fig.10 The timing diagram of the gate drive signal 400 and the refresh drive signal 300 in the display time H1 and the blanking time H2 is shown. The step S1: monitoring whether the display panel meets the preset refresh condition includes:

[0090] S11: monitoring whether the display panel meets a preset refresh condition after the current frame ends and before the next frame begins;

[0091] S23: If the preset refresh condition is met, the step of driving all pixel electrodes in the display surface to connect with the common electrode line through a refresh drive signal, and disconnecting the connection between all pixel electrodes in the display panel and the common electrode line after a first preset time includes:

[0092] S231: If the preset refresh condition is met, all pixel electrodes in the display panel are driven to connect with the common electrode line through a refresh drive signal after the current frame ends and before the next frame begins, and the connection between all pixel electrodes in the display panel and the common electrode line is disconnected after a first preset time.

[0093] To put it simply, it is to monitor whether the display panel 50 meets the preset refresh conditions within the blanking time H2 of the current frame, and complete the refresh drive signal within the blanking time H2 of the current frame to drive all pixel electrodes 140 in the display panel 50 to connect with the common electrode line 170, and disconnect the connection between all pixel electrodes 140 in the display panel 50 and the common electrode line 170 after the first preset time h, without affecting the normal display of the display panel 50 within the display time H1.

[0094] Of course, the technical solution of the present application can also be widely used in various display panels 50, such as TN (Twisted Nematic) display panel 50, IPS (In-Plane Switching) display panel 50, VA (Vertical Alignment) display panel 50, MVA (Multi-Domain Vertical Alignment) display panel 50, and of course, other types of display panels 50, such as OLED (Organic Light-Emitting Diode) display panel 50, can all be applicable to the above solution.

[0095] It should be noted that the limitations on the various steps involved in this solution, without affecting the implementation of the specific solution, are not deemed to limit the order of the steps. The steps written in front can be executed first, or later, or even simultaneously. As long as this solution can be implemented, it should be deemed to fall within the scope of protection of this application.

[0096] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0097] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A method for driving a display panel, characterized in that: The driving method of the display panel comprises the steps of: Monitor whether the display panel meets the preset refresh conditions; If the preset refresh condition is met, all pixel electrodes in the display panel are driven to be short-circuited by a refresh drive signal, and then disconnected after a first preset time; Wherein, the display panel is a liquid crystal display panel, and the preset refresh condition is that the current picture is a static picture, and the static picture duration is 5-10 minutes; If the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be short-circuited by a refresh drive signal and disconnected after a first preset time further includes: Recharging the pixel electrode to maintain the display of the current picture; The array substrate includes a first substrate, and data lines, scan lines, pixel electrodes, first active switches and second active switches arranged on the first substrate, the data lines and the scan lines are arranged in a crisscross manner to divide a plurality of pixel units, the first active switches, the second active switches and the pixel electrodes correspond to the pixel units one by one, the gate of the first active switch is connected to the scan line, the source of the first active switch is connected to the data line, and the drain of the first active switch is connected to the pixel electrode; The gate of the second active switch is used to receive a refresh drive signal, the source of the second active switch is connected to the pixel electrode, and the drain of each second active switch is connected; The display panel comprises an array substrate and an opposing substrate which are arranged opposite to each other, wherein the array substrate is arranged opposite to the opposing substrate, the opposing substrate comprises a second substrate and a common electrode arranged on the second substrate, the common electrode is arranged opposite to the pixel electrode, the array substrate further comprises a common electrode line which is arranged on the first substrate and connected to the common electrode; the drain of each second active switch is connected via the common electrode line; The first preset time needs to be shorter than the blanking period of one frame.

2. The method for driving a display panel according to claim 1, wherein: If the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be short-circuited by a refresh drive signal and then disconnected after a first preset time comprises: If the preset refresh condition is met, all pixel electrodes in the display panel are driven to be connected through the metal wires by the refresh drive signal, and the connection between all pixel electrodes in the display panel is disconnected after a first preset time.

3. The method for driving a display panel according to claim 2, wherein: If the preset refresh condition is met, the steps of driving all pixel electrodes in the display panel to be connected by a refresh drive signal, and disconnecting all pixel electrodes in the display panel after a first preset time include: If the preset refresh condition is met, all pixel electrodes in the display panel are driven to connect with the common electrode line through a refresh drive signal, and the connection between all pixel electrodes in the display panel and the common electrode line is disconnected after a first preset time.

4. The method for driving a display panel according to claim 2, wherein: If the preset refresh condition is met, the steps of driving all pixel electrodes in the display panel to be connected by a refresh drive signal, and disconnecting all pixel electrodes in the display panel after a first preset time include: If the preset refresh condition is met, all pixel electrodes in the display panel are driven to connect with the corresponding data lines or scan lines through a refresh drive signal, and the connection between all pixel electrodes in the display panel and the data lines or scan lines is disconnected after a first preset time.

5. The method for driving a display panel according to claim 1, wherein: The display panel is a liquid crystal display panel, and the preset refresh condition is that the current picture is a static picture, and the static picture duration is 5-10 minutes; If the preset refresh condition is met, the step of driving all pixel electrodes in the display panel to be short-circuited by a refresh drive signal and disconnected after a first preset time further includes: The pixel electrode is recharged to maintain the display of the current picture.

6. A driving circuit, characterized in that: The driving circuit is used to execute the display panel driving method according to any one of claims 1 to 5, the driving circuit comprises a detection and judgment module, a refresh drive signal generation module and an equipotential control module, the detection and judgment module is used to judge whether the display panel meets the preset refresh condition; The detection and judgment module is connected to the refresh drive signal generation module to control the refresh drive signal generation module to generate a refresh drive signal; the equipotential control module is respectively connected to the pixel electrode and the refresh drive signal generation module to receive the signal sent by the refresh drive signal generation module and control all pixel electrodes to short-circuit.

7. A display panel, characterized in that: The display panel is driven by the display panel driving method according to any one of claims 1 to 5, the display panel comprises an array substrate, the array substrate comprises a first substrate, and data lines, scan lines, pixel electrodes, a first active switch and a second active switch arranged on the first substrate, the data lines and the scan lines are arranged in a crisscross manner to divide a plurality of pixel units, the first active switch, the second active switch and the pixel electrode all correspond to the pixel units one by one, the gate of the first active switch is connected to the scan line, the source of the first active switch is connected to the data line, and the drain of the first active switch is connected to the pixel electrode; The gate of the second active switch is used to receive a refresh drive signal, the source of the second active switch is connected to the pixel electrode, and the drain of each second active switch is connected.

8. The display panel according to claim 7, characterized in that: The display panel includes an array substrate and an opposing substrate which are arranged opposite to each other. The array substrate is arranged opposite to the opposing substrate. The opposing substrate includes a second substrate and a common electrode arranged on the second substrate. The common electrode is arranged opposite to the pixel electrode. The array substrate also includes a common electrode line which is arranged on the first substrate and connected to the common electrode. The drain of each second active switch is connected through the common electrode line.

Images