Display panel, driving method thereof, and display device

Abstract

The present application discloses a display panel, a driving method thereof, and a display device, wherein the display panel includes a pixel circuit and a light-emitting element, a driving module for providing a driving current, and a gating module including N switches, wherein the first ends of the N switches are all connected to the output end of the driving module, and the second ends of the N switches are respectively connected to N light-emitting elements of different luminous colors. In addition, within a frame, only one switch is turned on, and the light-emitting elements of one luminous color in the same row are illuminated, and the light-emitting elements in different rows in an illuminated state have different luminous colors. By connecting a driving circuit to N switches, light-emitting elements of different colors can be driven in a time-sharing manner. Light-emitting elements of different colors can be illuminated within the same frame, avoiding the color halo phenomenon caused by driving only a single color pixel in each subframe time period. This can improve the resolution while solving the color halo problem, thereby improving the user's viewing comfort and experience.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, power saving, thin body, and wide range of applications, becoming the mainstream display device.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] The embodiments of the present application provide a display panel and its driving method, as well as a display device, which solve the color halo phenomenon caused by driving only a single color pixel in each sub-frame time period. It can solve the color halo problem while improving the resolution, thereby improving the user's viewing comfort and experience.

[0005] In a first aspect, an embodiment of the present application provides a display panel including a pixel circuit and a light-emitting element, wherein the pixel circuit includes:

[0006] A driving module, used for providing driving current;

[0007] A gating module includes N switches, wherein the first ends of the N switches are connected to the output end of the driving module, and the second ends of the N switches are respectively connected to N light-emitting elements with different luminous colors, where N is an integer greater than 1;

[0008] In one frame, one of the N switches is in an on state, and the other switches are in an off state, and at least some of the light-emitting elements in the emitting state have different colors.

[0009] In one possible implementation of the first aspect, light-emitting elements of one luminous color located in the same row are in a luminous state, and light-emitting elements in different rows that are in a luminous state emit different luminous colors;

[0010] Preferably, N is 3;

[0011] Preferably, the N switches include a first switch tube, a second switch tube, and a third switch tube; the light-emitting elements emitting different colors include a first color light-emitting element, a second color light-emitting element, and a third color light-emitting element; three light-emitting elements of different colors, a driving module, and a gating module constitute a pixel unit, and a gating module includes N switches;

[0012] The second electrode of the first switching tube is connected to the first color light emitting element, the second electrode of the second switching tube is connected to the second color light emitting element, and the second electrode of the third switching tube is connected to the third color light emitting element.

[0013] In a possible implementation of the first aspect, the gate of each switching tube is connected to different control signal lines, and the different control signal lines include a first control signal line, a second control signal line, and a third control signal line;

[0014] Preferably, the gate of each switch tube is connected to different control signal lines, including:

[0015] The gates of the first switching transistors connected to the first color light-emitting elements in the 1+3Qth row are connected to the first control signal line, the gates of the second switching transistors connected to the second color light-emitting elements in the 2+3Qth row are connected to the first control signal line, and the gates of the third switching transistors connected to the third color light-emitting elements in the 3+3Qth row are connected to the first control signal line, where Q is an integer greater than or equal to 0;

[0016] The gates of the second switching transistors connected to the second color light-emitting elements in the 1+3Q rows are connected to the second control signal line, the gates of the third switching transistors connected to the third color light-emitting elements in the 2+3Q rows are connected to the second control signal line, and the gates of the first switching transistors connected to the first color light-emitting elements in the 3+3Q rows are connected to the second control signal line;

[0017] The gate of the third switching tube connected to the third color light-emitting element in the 1+3Q row is connected to the third control signal line, the gate of the first switching tube connected to the first color light-emitting element in the 2+3Q row is connected to the third control signal line, and the gate of the second switching tube connected to the second color light-emitting element in the 3+3Q row is connected to the third control signal line.

[0018] In a possible implementation of the first aspect, within a frame, signals on the plurality of first control signal lines are the same;

[0019] and / or, within one frame, the signals on the plurality of second control signal lines are the same;

[0020] And / or, within one frame, the signals on the plurality of third control signal lines are the same.

[0021] In a possible implementation of the first aspect, within a frame, light-emitting elements in different rows that are in a light-emitting state are staggered.

[0022] In a possible implementation of the first aspect, the N switches are turned on frame by frame;

[0023] Preferably, when the duration of a frame is less than or equal to a preset threshold, the N switches are turned on frame by frame.

[0024] In a possible implementation of the first aspect, within a preset time period, one of the N switches is in an on state, and the other switches are in an off state, and the preset time period includes multiple frames.

[0025] Preferably, when the duration of a frame is greater than a preset threshold, within the preset duration, one of the N switches is in an on state, and the others are in an off state;

[0026] Preferably, within different preset time periods at the first refresh rate, the N switches are alternately turned on.

[0027] In a second aspect, an embodiment of the present application further provides a method for driving a display panel, wherein the display panel includes a pixel circuit and a light-emitting element, wherein the pixel circuit includes a driving module and a gating module; the driving module is configured to provide a driving current;

[0028] The gating module includes N switches, wherein the first ends of the N switches are connected to the output end of the driving module, and the second ends of the N switches are respectively connected to N light-emitting elements with different luminous colors, where N is an integer greater than 1;

[0029] The driving method of the display panel includes:

[0030] In one frame, one of the N switches is controlled to be in the on state, and the other switches are controlled to be in the off state. The light-emitting elements of one color located in the same row are controlled to be in the emitting state, and the light-emitting elements in different rows are controlled to be in the emitting state with different emitting colors.

[0031] In a possible implementation of the second aspect, the method further includes:

[0032] Control N switches to turn on frame by frame;

[0033] Alternatively, within a preset time period, one of the N switches is controlled to be in an on state, and the other switches are controlled to be in an off state, and the preset time period includes a plurality of frames.

[0034] In a possible implementation of the second aspect, the method further includes:

[0035] In one frame, the signals on the plurality of first control signal lines are the same;

[0036] and / or, within one frame, the signals on the plurality of second control signal lines are the same;

[0037] And / or, within one frame, the signals on the plurality of third control signal lines are the same.

[0038] In a possible implementation of the second aspect, the method further includes: within a frame, controlling the light-emitting elements in different rows and having staggered distributions to be in a light-emitting state.

[0039] In a possible implementation of the second aspect, the method further includes: controlling the N switches to be turned on frame by frame when the duration of a frame is less than or equal to a preset threshold.

[0040] In a possible implementation of the second aspect, the method further includes: when the duration of a frame is greater than a preset threshold, within the preset duration, one of the N switches is in an on state and the others are in an off state, and the preset duration includes multiple frames.

[0041] Preferably, within different preset time periods at the first refresh rate, the N switches are alternately turned on.

[0042] In a third aspect, an embodiment of the present application further provides a display device, comprising the display panel described in any one of the embodiments of the first aspect.

[0043] The display panel and its driving method, as well as the display device, of the embodiments of the present application include a display panel including a pixel circuit and a light-emitting element, a driving module for providing a driving current, and a gating module including N switches, wherein the first ends of the N switches are connected to the output end of the driving module, and the second ends of the N switches are respectively connected to N light-emitting elements of different luminous colors, where N is an integer greater than 1, and within a frame, one of the N switches is in an on state, and the other switches are in an off state, and the light-emitting elements of one luminous color in the same row are in an luminous state, and the light-emitting elements in different rows that are in an luminous state have different luminous colors. By connecting a driving circuit to N switches, light-emitting elements of different colors can be driven in a time-sharing manner, and light-emitting elements of different colors can be illuminated within the same frame, avoiding the color halo phenomenon caused by driving only a single color pixel in each subframe time period, and solving the color halo problem while improving resolution, thereby improving the user's viewing comfort and experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0045] Figure 1-a A schematic diagram of a display panel structure provided in an embodiment of the present application;

[0046] Figure 1-b A schematic diagram of the structure of a pixel provided in an embodiment of the present application;

[0047] Figure 2 A schematic structural diagram of another pixel provided in an embodiment of the present application;

[0048] Figure 3 A schematic diagram of the structure of a pixel in the first column and the first three rows provided in an embodiment of the present application;

[0049] Figure 4 A schematic diagram of the light emission status of the pixels in the first column and the first three rows within a data refresh frame T1 provided in an embodiment of the present application;

[0050] Figure 5 A schematic diagram of the overall lighting condition of a display panel within a data refresh frame T1 provided in an embodiment of the present application;

[0051] Figure 6 A schematic diagram of a display panel driving method provided in an embodiment of the present application;

[0052] Figure 7 A schematic diagram of another display panel driving method provided in an embodiment of the present application;

[0053] Figure 8 A schematic diagram of another display panel driving method provided in an embodiment of the present application;

[0054] Figure 9 A schematic structural diagram of a display device provided in an embodiment of the present application.

[0055] in:

[0056] 100-display panel; 10-pixel circuit; 11-driving module; 12-selection module; 121-first switching tube; 122-second switching tube; 123-third switching tube; 20-light-emitting element; 21-first color light-emitting element; 22-second color light-emitting element; 23-third color light-emitting element; S1-first control signal line; S2-second control signal line; S3-third control signal line. DETAILED DESCRIPTION

[0057] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0058] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or device comprising the elements.

[0059] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0060] It will be apparent to those skilled in the art that various modifications and variations can be made in this application without departing from the spirit or scope of this application. Therefore, this application is intended to cover modifications and variations of this application that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the embodiments provided in the examples of this application can be combined with each other without contradiction.

[0061] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0062] In the prior art, each OLED pixel of an OLED display panel requires a corresponding driving circuit to drive the OLED pixel. The large number of wirings and driving circuits results in a single light-emitting unit, i.e., a light-emitting unit consisting of an OLED pixel and a corresponding driving circuit, occupying a large area, resulting in the problem of low PPI resolution of the display panel.

[0063] In some prior art technologies, the ratio of the number of drive circuits to display pixels is changed from 1:1 to 1:3 from a hardware circuit structure perspective, i.e., one drive circuit corresponds to three display pixels. This reduces the number of wiring and drive circuits, reduces the area occupied by a single light-emitting unit, and improves the PPI resolution of the display panel. However, when driving pixels in this prior art, only sub-pixels of the same color are illuminated at the same time. For example, during the first sub-frame, only R_OLED emits light, during the second sub-frame, only G_OLED emits light, and during the third sub-frame, only B_OLED emits light. The inventors have discovered that this prior art is only suitable for scenarios with high refresh rates, such as those with a high refresh rate of >180 Hz. However, in scenarios with normal refresh rates, such as those with a refresh rate of 60 to 180 Hz, the switching speed of the three monochrome images slows down, resulting in a color halo phenomenon, which can cause dizziness in users, affect their viewing comfort, and reduce their viewing experience. Further research by the inventors revealed that at low refresh rates, such as those below 60Hz, users may experience noticeable alternations between red, green, and blue. This is a serious anomaly that significantly impacts viewing comfort and the user experience. Therefore, because each subframe in the existing technology can only drive a single-color pixel, it suffers from color haloing at normal refresh rates and display anomalies at low refresh rates, impacting user viewing comfort and experience.

[0064] Based on this, the embodiments of the present application provide a display panel and its driving method, and a display device, which can solve the color halo problem under normal refresh frequency and the display abnormality problem under low refresh frequency, thereby improving the user's viewing comfort and experience.

[0065] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0066] Figure 1-a is a schematic diagram of a display panel provided in an embodiment of the present application, such as Figure 1-a As shown, the display panel 100 includes n×m pixel units Pixel, as shown in FIG. Figure 1-b As shown, each pixel unit Pixel includes a pixel circuit 10 and a light emitting element 20. The pixel circuit 10 includes a driving module 11 for providing a driving current.

[0067] The gating module 12 includes N switches, wherein the first ends of the N switches are connected to the output end of the driving module 11, and the second ends of the N switches are respectively connected to N light-emitting elements 20 with different luminous colors, where N is an integer greater than 1;

[0068] In one frame, one of the N switches is in an on state, and the other switches are in an off state, and at least some of the light-emitting elements in the emitting state have different colors.

[0069] The pixel unit Pixel, hereinafter referred to as pixel Pixel, has n rows and m columns of pixels in the display area of ​​the display panel 100 . The pixel Pixel includes a pixel circuit and a light-emitting element.

[0070] It should be noted that in the embodiment of the present application, three frames can be combined into a complete picture. Among them, one frame is a data refresh frame. Within a data refresh frame, the driver modules connected to the multiple rows of light-emitting elements are refreshed row by row. In other words, the driver modules connected to the multiple rows of light-emitting elements write data signals row by row.

[0071] Specifically, if Figure 1-a As shown, the display panel 100 may include n×m pixels Pixel, for example, pixel Pixel_11 in the first row and first column, pixel Pixel_12 in the first row and second column, ..., pixel Pixel_1m in the first row and mth column. Figure 1-b As shown, each pixel Pixel_nm can include a pixel circuit 10 and a light-emitting element 20. Further, the pixel circuit 10 can include a driving module 11 and a gating module 12, wherein the driving module 11 can be used to provide a driving current to drive the light-emitting element to emit light, and the gating module 12 can include N switches, for example, N can be 2, N can also be 3, and the value of N can be set according to the resolution requirements.

[0072] Within one frame time, only one switch among the N switches is in the on state, and the other switches are in the off state. For example, within one frame time T1, only one switch of the selection module 12 in the pixel circuit 10 of the pixel Pixel_nm is on, and the others are in the off state. Since one switch controls one light-emitting element, only one light-emitting element can be in the light-emitting state.

[0073] In the display panel provided in the embodiment of the present application, the display panel includes a pixel circuit and a light-emitting element. A driving module is used to provide a driving current. The gating module includes N switches. The first ends of the N switches are connected to the output end of the driving module, and the second ends of the N switches are respectively connected to N light-emitting elements with different luminous colors, where N is an integer greater than 1. Moreover, within a frame, one of the N switches is in an on state, and the other switches are in an off state. At least some of the light-emitting elements in the luminous state have different colors. By connecting a driving circuit to N switches, light-emitting elements of different colors can be driven in a time-sharing manner. Light-emitting elements of different colors can be illuminated within the same frame, avoiding the color halo phenomenon caused by driving only a single color pixel in each subframe time period. It can solve the color halo problem while improving resolution, thereby improving the user's viewing comfort and experience.

[0074] In some embodiments, light-emitting elements of one color located in the same row are in a light-emitting state, and light-emitting elements in different rows that are in a light-emitting state emit different colors of light;

[0075] Preferably, if Figure 2 As shown, N is 3;

[0076] Preferably, you can continue to see Figure 2 , N switches include a first switch tube 121, a second switch tube 122, and a third switch tube 123; light-emitting elements with different luminous colors include a first color light-emitting element 21, a second color light-emitting element 22, and a third color light-emitting element 23; three light-emitting elements of different colors, a driving module, and a gating module constitute a pixel unit, and a gating module includes N switches;

[0077] The second electrode of the first switch tube 121 is connected to the first color light emitting element 21 , the second electrode of the second switch tube 122 is connected to the second color light emitting element 22 , and the second electrode of the third switch tube 123 is connected to the third color light emitting element 23 .

[0078] The first color light emitting element 21, the second color light emitting element 22, and the third color light emitting element 23 are light emitting elements of different colors. For example, the first color light emitting element 21 may be an R-OLED, the second color light emitting element 22 may be a G-OLED, and the third color light emitting element 23 may be a B-OLED.

[0079] The first switching transistor is connected to the first color light-emitting element and can be referred to as the first switching transistor. There can be multiple first switching transistors. The second switching transistor is connected to the second color light-emitting element and can be referred to as the second switching transistor. There can be multiple second switching transistors. The third switching transistor is connected to the third color light-emitting element and can be referred to as the third switching transistor. There can be multiple third switching transistors. For example, the switching transistor connected to the R-OLED is the first switching transistor, the switching transistor connected to the G-OLED is the second switching transistor, and the switching transistor connected to the B-OLED is the third switching transistor.

[0080] Specifically, within a data refresh frame, the driver modules connected to the corresponding rows of light-emitting elements write data signals row by row. Driver modules connected to the same row of light-emitting elements write data signals corresponding to light-emitting elements of the same color, while driver modules connected to different rows of light-emitting elements write data signals corresponding to light-emitting elements of different colors. In other words, only light-emitting elements of one color are illuminated in the same row of light-emitting elements, and the illuminated light-emitting elements in different rows emit different colors. For example, only red light-emitting elements are illuminated in the first row of pixels, only green light-emitting elements are illuminated in the second row of pixels, only blue light-emitting elements are illuminated in the third row of pixels, and only red light-emitting elements are illuminated in the fourth row of pixels, and so on. By connecting a single driver circuit to N switches, light-emitting elements of different colors can be driven in a time-sharing manner. Within the same frame, light-emitting elements of R, G, and B colors in different rows can be illuminated, avoiding the color haloing phenomenon caused by driving only a single color pixel in each subframe time period. This improves resolution while also solving the color haloing problem, enhancing user viewing comfort and experience.

[0081] Continue to see Figure 2 When N=3, the first switch tube in the pixel circuit 10 is connected to the R-OLED, the second switch tube is connected to the G-OLED, and the third switch tube is connected to the B-OLED. The ratio of the pixel circuit to the light-emitting element is 1:3, which simplifies the circuit, reduces the number of pixel circuits and wiring, and effectively improves the resolution of the display panel.

[0082] In some embodiments, as Figure 3 As shown, the gate of each switch tube in the pixel circuit 10 is connected to different control signal lines, and the different control signal lines include a first control signal line S1, a second control signal line S2, and a third control signal line S3;

[0083] Preferably, the gate of each switch tube is connected to different control signal lines, including:

[0084] The gates of the first switching transistors connected to the first color light-emitting elements in the 1+3Qth row are connected to the first control signal line, the gates of the second switching transistors connected to the second color light-emitting elements in the 2+3Qth row are connected to the first control signal line, and the gates of the third switching transistors connected to the third color light-emitting elements in the 3+3Qth row are connected to the first control signal line, where Q is an integer greater than or equal to 0;

[0085] The gates of the second switching transistors connected to the second color light-emitting elements in the 1+3Q rows are connected to the second control signal line, the gates of the third switching transistors connected to the third color light-emitting elements in the 2+3Q rows are connected to the second control signal line, and the gates of the first switching transistors connected to the first color light-emitting elements in the 3+3Q rows are connected to the second control signal line;

[0086] The gate of the third switching tube connected to the third color light-emitting element in the 1+3Q row is connected to the third control signal line, the gate of the first switching tube connected to the first color light-emitting element in the 2+3Q row is connected to the third control signal line, and the gate of the second switching tube connected to the second color light-emitting element in the 3+3Q row is connected to the third control signal line.

[0087] Specifically, if Figure 3 As shown, Figure 3 The figure shows the connection between the switches and control signal lines in "different rows" when N = 3, using the pixels Pixel_11, Pixel_21, and Pixel_31 in the first three rows of the first column of the display panel as an example. The first control signal line S1 is connected to the first switch 121 that controls the R-OLED in the first row, the second switch 122 that controls the G-OLED in the second row, and the third switch 123 that controls the B-OLED in the third row. In other words, the first control signal line S1 can control the R-OLEDs in rows 1, 4, 7, ..., the G-OLEDs in rows 2, 5, 8, ..., and the B-OLEDs in rows 3, 6, 9, ..., to emit light. Similarly, the second control signal line S2 can control the G-OLEDs in rows 1, 4, 7, ..., the B-OLEDs in rows 2, 5, 8, ..., and the R-OLEDs in rows 3, 6, 9, ...; the third control signal line S3 controls the B-OLEDs in rows 1, 4, 7, ..., the R-OLEDs in rows 2, 5, 8, ..., and the G-OLEDs in rows 3, 6, 9, .... Thus, the same control signal line can control 1 / 3 of the RGB light-emitting elements in the entire screen, that is, the same control signal line can illuminate 1 / 3 of the RGB light-emitting elements in the entire screen, so that the screen displays 1 / 3 of the image. By time-sharing control of the S1, S2, and S3 control signal lines, different 1 / 3 of the RGB light-emitting elements in the entire screen can be illuminated separately, switching between three images, allowing the human eye to superimpose them as a complete picture.

[0088] In some embodiments, within a frame, the signals on the plurality of first control signal lines are the same;

[0089] and / or, within one frame, the signals on the plurality of second control signal lines are the same;

[0090] and / or, within one frame, the signals on the plurality of third control signal lines are the same;

[0091] Specifically, there can be multiple first control signal lines, such as S1(1), S1(2), ..., S1(n), which can turn on the light-emitting elements row by row. However, the inventors have discovered that in order to further improve the resolution, the signals on multiple first control signal lines can be controlled to be the same within a frame. Therefore, only one control signal needs to be drawn to control multiple first control signal lines. In other words, only one pin needs to be added to the driver chip or driver circuit in the non-display area. This pin continuously outputs a constant high level or a constant low level within a frame to control "multiple" first control signal lines. The circuit is simple, more stable and reliable, and occupies fewer resources, which can further improve the resolution of the display panel. Similarly, only one control signal needs to be drawn to control multiple second control signal lines, and only one control signal needs to be drawn to control multiple third control signal lines, which further simplifies the circuit. Compared with the requirement of applying n signals to n first control signal lines, n signals to n second control signal lines, and n signals to n third control signal lines, in the embodiment of the present application, only 3 signals are needed to drive all the first control signal lines, second control signal lines, and third control signal lines respectively. The circuit is further simplified on the basis of the 1:3 ratio of pixel circuit to light-emitting element, which greatly reduces the number of control signal lines and the number of control signals. The control logic is simple, resources are saved, and the resolution of the display panel is further improved.

[0092] In some embodiments, as Figure 4 As shown, within one frame, the light-emitting elements in different rows that are in a light-emitting state are staggered.

[0093] Specifically, the following description is made by taking the pixels Pixel_11, Pixel_21, and Pixel_31 in the first column and first three rows of the display panel as an example. Figure 4 As shown, Figure 4 This is a schematic diagram of the luminescence of the pixels in the first three rows of the first column within a data refresh frame T1 provided by an embodiment of the present application. Within the first frame time T1, the first control signal line S1 is active, and the luminescent elements R, G, and B in different rows are staggered. The luminescence of the entire display panel is shown in FIG. Figure 5 As shown, Figure 5A schematic diagram of the overall luminescence of the display panel within a data refresh frame T1 provided by an embodiment of the present application shows that within a data refresh frame T1, the S1 signal line is activated, causing the R-OLEDs in rows 1, 4, 7... to illuminate, the G-OLEDs in rows 2, 5, 8... to illuminate, and the B-OLEDs in rows 3, 6, 9... to illuminate. Similarly, within a data refresh frame T2, the S2 signal line is activated, and within a data refresh frame T3, the S3 signal line is activated. Within the same data refresh frame, R, G, and B light-emitting elements in different rows can be illuminated, avoiding the halo phenomenon caused by driving only a single color pixel within each subframe time period. This can solve the halo problem while improving resolution, enhancing the user's viewing comfort and experience.

[0094] In some embodiments, the N switches are turned on frame by frame;

[0095] Preferably, when the duration of a frame is less than or equal to a preset threshold, the N switches are turned on frame by frame.

[0096] Among them, the situation where the length of a frame is less than or equal to the preset threshold refers to the situation where the refresh rate is high, for example, the refresh rate is greater than 60HZ. The higher the refresh rate, the shorter the length of a frame.

[0097] Specifically, N switches can be turned on frame by frame. For example, three switches in a pixel circuit are turned on frame by frame, and the number of light-emitting elements that emit light in one frame is 1 / 3 of the total number of light-emitting elements. Three frames are combined to form a complete picture.

[0098] In one embodiment, when the refresh rate is high, the N switches may be turned on “frame by frame”.

[0099] It should be noted that the inventors have discovered that by synthesizing and displaying an image through three frames, for example, in the first frame: S1 is active, lighting up 1 / 3 of the RGB; in the second frame: S2 is active, lighting up the remaining 1 / 3 of the RGB; in the third frame: S3 is active, lighting up the last 1 / 3 of the RGB, it is possible to light up R, G, and B light-emitting elements in different rows within the same frame. This solves the problem of color haloing at normal refresh rates and display abnormalities at low refresh rates caused by the existing technology that each sub-frame can only drive a single color pixel, thereby improving user viewing comfort and experience. The inventors further discovered that when the refresh rate is relatively fast, the human eye will superimpose the three frames. However, at a low refresh rate, if the three frames are still used for switching, flickering abnormalities will occur. The human eye cannot properly superimpose the three frames. Therefore, it is possible to maintain a fixed state without switching the frames. That is, during a frame, only one control line S1, S2, or S3 is active, and only 1 / 3 of the RGB is fixedly lit. Although some resolution is sacrificed, normal display is achieved, improving the display effect.

[0100] In some embodiments, within a preset time period, one of the N switches is in an on state, and the other switches are in an off state, and the preset time period includes multiple frames.

[0101] Preferably, when the duration of a frame is greater than a preset threshold, within the preset duration, one of the N switches is in an on state and the others are in an off state, and the preset duration includes multiple frames.

[0102] Preferably, within different preset time periods at the first refresh rate, the N switches are alternately turned on.

[0103] Among them, the situation where the duration of a frame is greater than a preset threshold refers to a low refresh rate situation.

[0104] Specifically, in the case of low refresh rate, for example, when the refresh rate is less than 60HZ, only one of the three switching tubes in the pixel circuit is in a continuously on state, and the other switching tubes are in a continuously off state. That is to say, only one of the three control signal lines continues to work, and only 1 / 3 of the R, G, and B light-emitting elements continue to emit light, avoiding the abnormal flickering phenomenon in the case of low refresh rate.

[0105] It should be noted that the inventors have discovered that, under low refresh rates, only 1 / 3 of the light-emitting elements are fixedly lit, while the remaining light-emitting elements are not emitting light. This will cause differences in the light-emitting time of the light-emitting elements, resulting in a poorer lifespan balance of the light-emitting elements. As time goes by, the differences in the light-emitting time of the light-emitting elements become more obvious. Therefore, the switching frequency of S1, S2, and S3 can be changed from one frame to a preset duration, where the preset duration can include multiple frames. That is, under normal or high refresh rates, the switching frequency of S1, S2, and S3 can be one frame, and one of S1, S2, and S3 is active within one frame; under low refresh rates, only one of S1, S2, and S3 can be kept fixed and active, which can avoid abnormal flickering. Alternatively, the switching can be performed every preset duration, and one of S1, S2, and S3 is active within the preset duration, except that the switching frequency of S1, S2, and S3 is slower. This can avoid abnormal flickering while balancing the lifespan of the light-emitting elements, thereby extending the service life of the entire display panel.

[0106] In one embodiment, N switches are alternately turned on within different preset time periods at a first refresh rate, which means that when the refresh rate is less than 60 Hz, S1 is active for a period of time, S2 is active for a period of time, and S3 is active for a period of time. For example, when the refresh rate is less than 60 Hz, S1 is active, and then the cumulative time that S1 is active can be detected. When the cumulative time that S1 is active exceeds the preset time period, the switch is switched to S2 and the time that S1 is active is reset. When the cumulative time that S2 is active exceeds the preset time period, the switch is switched to S3 and the time that S2 is active is reset. When the cumulative time that S3 is active exceeds the preset time period, the switch is switched back to S1 and the time that S3 is active is reset. That is to say, when the refresh rate is less than 60HZ, within the first preset time period, the first switch tube is turned on and only 1 / 3 of the OLED is illuminated; within the second preset time period, the second switch tube is turned on and only another 1 / 3 of the OLED is illuminated; within the third preset time period, the third switch tube is turned on and only the remaining 1 / 3 of the OLED is illuminated. This cycle can avoid the abnormal flickering phenomenon caused by switching between different screens at low refresh rates, and can also balance the luminous time of the OLED, balance the life of the OLED, and extend the service life of the display panel.

[0107] Based on the same inventive concept, an embodiment of the present application further provides a method for driving a display panel, which can be used to drive the display panel described in any of the above embodiments.

[0108] like Figure 6 As shown, the embodiment of the present application also provides a method for driving a display panel, which may include:

[0109] S510, within one frame, controls one of the N switches to be in the on state, controls the other switches to be in the off state, controls the light-emitting elements of one color located in the same row to be in the light-emitting state, and controls the light-emitting elements in different rows to be in the light-emitting state to have different light-emitting colors.

[0110] Specifically, within a single frame, only one of the N switches in a pixel circuit is turned on to control the light-emitting elements of a single color in the same row to emit light. For example, the first switch can control the red light-emitting elements in the first row, the green light-emitting elements in the second row, and the blue light-emitting elements in the third row. Within the same frame, R, G, and B light-emitting elements in different rows can be illuminated. This avoids the color haloing phenomenon caused by driving only a single color pixel in each subframe time period, improving resolution while solving the color haloing problem, and enhancing user viewing comfort and experience.

[0111] In some embodiments, as Figure 7 and Figure 8 As shown, the method further includes:

[0112] S511, controlling N switches to be turned on frame by frame. Within one frame, one of the N switches is controlled to be in an on state, and the other switches are controlled to be in an off state. Light-emitting elements of one color in the same row are controlled to be in an emitting state, and light-emitting elements in different rows are controlled to emit different colors.

[0113] Alternatively, S152, within a preset time length, one of the N switches is controlled to be in the on state, and the other switches are controlled to be in the off state, and the preset time length includes multiple frames; within one frame, one of the N switches is controlled to be in the on state, and the other switches are controlled to be in the off state, and the light-emitting elements of one color located in the same row are controlled to be in the light-emitting state, and the light-emitting elements in different rows that are in the light-emitting state are controlled to have different light-emitting colors.

[0114] It should be noted that the driving method of the display panel within one frame time can refer to step S510, and in the case of multiple frames, the driving method can refer to step S511 or step S512.

[0115] Specifically, step S511 can be understood as controlling N switches to be turned on frame by frame, so that all light-emitting elements in N frames can be turned on. For example, if N is 3, the three switches S1, S2, and S3 can be controlled to be turned on frame by frame respectively. All light-emitting elements can be turned on in three frames, and the three frames can be combined into a complete picture, which solves the problem of color halo at normal refresh frequency and display abnormality at low refresh frequency caused by the existing technology that only a single color pixel can be driven per frame, thereby improving the user's viewing comfort and experience.

[0116] Specifically, step S512 can be understood as controlling one of the N switches to be continuously in the on state and controlling the other switches to be continuously in the off state within a preset time period, that is, within multiple frame times, which can solve the abnormal flickering problem at low refresh rates.

[0117] It should be noted that the preset duration is the cumulative continuous duration of a single control signal line in effect. The preset duration can be greater than the duration of a frame. The preset duration can be set as needed, such as 1 hour or 10 minutes, and is not limited to this in the embodiments of the present application. For example, if the preset duration is 10 minutes and the display panel is at a low refresh rate for a cumulative duration of 5 hours in a day, then within these 5 hours, the cumulative active time of each control line S1, S2, and S3 will switch to each other once every 10 minutes. By calculating the cumulative time, the life of the light-emitting elements can be better balanced, and the service life of the entire display panel can be better extended.

[0118] In some embodiments, the method further comprises:

[0119] In one frame, controlling the signals on the plurality of first control signal lines to be the same;

[0120] and / or, within one frame, controlling the signals on the plurality of second control signal lines to be identical;

[0121] And / or, within one frame, the signals on the plurality of third control signal lines are controlled to be the same.

[0122] Specifically, within a single frame, the signals on multiple first control signal lines can be controlled to be identical. Therefore, only one control signal is needed to simultaneously control multiple first control signal lines. This simplifies and improves the control logic, reduces resource usage, and further improves the resolution of the display panel. Similarly, only one control signal is needed to simultaneously control multiple second control signal lines, and only one control signal is needed to simultaneously control multiple third control signal lines. This reduces the number of control signals, simplifies and improves the control logic, conserves resources, and reduces the amount of wiring, further improving the resolution of the display panel.

[0123] In some embodiments, the method further includes: within a frame, controlling the light emitting elements in different rows and staggered distribution to be in a light emitting state.

[0124] Specifically, within one frame time, a control signal line is activated to control the staggered light-emitting elements R, G, and B located in different rows to be in a light-emitting state. Therefore, in the pixels of the first three rows of the first column, the light-emitting elements of three colors R, G, and B emit light, which is equivalent to the three columns of pixels being reorganized into a large pixel. Therefore, from a macro perspective, one frame can also display the entire image, but the resolution is 1 / 3. The resolution of the image after the three frames are superimposed is higher.

[0125] In some embodiments, the method further includes: controlling the N switches to be turned on frame by frame when the duration of a frame is less than or equal to a preset threshold.

[0126] Specifically, when the refresh rate is high, N switches can be turned on "frame by frame", and the human eye can synthesize N pictures into a complete picture, which improves the resolution and ensures normal picture display.

[0127] In some embodiments, the method further includes: when the duration of a frame is greater than a preset threshold, within the preset duration, one of the N switches is in an on state and the others are in an off state, where the preset duration includes multiple frames;

[0128] Preferably, within different preset time periods at the first refresh rate, the N switches are alternately turned on.

[0129] Specifically, within the preset time period, only one of the three control signal lines continues to function, and only 1 / 3 of the R, G, and B light-emitting elements continue to emit light, avoiding the abnormal flickering phenomenon under low refresh rate conditions.

[0130] Within different preset time periods under the first refresh rate, N switches are alternately turned on, which means that within different preset time periods, a different switch can be controlled to be in the on state, that is, when the refresh rate is less than 60HZ, 1 / 3 of the light-emitting elements emit light within the first preset time period, the remaining 1 / 3 of the light-emitting elements emit light within the second preset time period, and the last 1 / 3 of the light-emitting elements emit light within the third preset time period, and so on. This can avoid abnormal flickering while balancing the lifespan of the light-emitting elements and extending the service life of the entire display panel.

[0131] Figure 9 This is a schematic diagram of a display device provided in the present application. The display device may include a display panel. The display device may be at least one of a wearable device, a camera, a mobile phone, a tablet computer, a display screen, a television, and a vehicle-mounted display terminal.

[0132] The display panel includes the display panel provided by any one of the above embodiments, and the display device includes the display panel, so the display device has all the beneficial effects of the above display panel.

[0133] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0134] It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0135] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A display panel, characterized in that: The device comprises a pixel circuit and a light-emitting element, wherein the pixel circuit comprises: A driving module, used for providing driving current; a gating module comprising N switches, wherein first ends of the N switches are connected to the output end of the driving module, and second ends of the N switches are respectively connected to N light-emitting elements of different luminous colors, where N is an integer greater than 1; Wherein, within one frame, one of the N switches is in an on state, the other switches are in an off state, and at least some of the light-emitting elements in an emitting state have different colors; In one frame, the light-emitting elements of one color located in the same row are in a light-emitting state, and the light-emitting elements in different rows that are in a light-emitting state emit different colors. N is 3; the N switches include a first switch tube, a second switch tube, and a third switch tube; the light-emitting elements with different luminous colors include a first color light-emitting element, a second color light-emitting element, and a third color light-emitting element; three light-emitting elements of different colors, a driving module, and a gating module constitute a pixel unit, and a gating module includes N switches; The second electrode of the first switching tube is connected to the first color light emitting element, the second electrode of the second switching tube is connected to the second color light emitting element, and the second electrode of the third switching tube is connected to the third color light emitting element; When the duration of a frame is less than or equal to a preset threshold, the N switches are turned on frame by frame; During a preset time period, one of the N switches is in an on state and the other switches are in an off state, wherein the preset time period includes a plurality of frames; When the duration of a frame is greater than a preset threshold, within the preset duration, one of the N switches is in an on state, and the others are in an off state; The N switches are alternately turned on within different preset time periods at the first refresh rate.

2. The display panel according to claim 1, wherein: The gate of each switching tube is connected to different control signal lines respectively, and the different control signal lines include a first control signal line, a second control signal line, and a third control signal line.

3. The display panel according to claim 2, wherein: The gate of each of the switching tubes is connected to different control signal lines, including: The gate of the first switching transistor connected to the first color light-emitting elements in the 1+3Qth row is connected to the first control signal line, the gate of the second switching transistor connected to the second color light-emitting elements in the 2+3Qth row is connected to the first control signal line, and the gate of the third switching transistor connected to the third color light-emitting elements in the 3+3Qth row is connected to the first control signal line, where Q is an integer greater than or equal to 0; The gates of the second switching transistors connected to the second color light-emitting elements in the 1+3Q rows are connected to the second control signal line, the gates of the third switching transistors connected to the third color light-emitting elements in the 2+3Q rows are connected to the second control signal line, and the gates of the first switching transistors connected to the first color light-emitting elements in the 3+3Q rows are connected to the second control signal line; The gate of the third switching tube connected to the third color light-emitting element in the 1+3Q row is connected to the third control signal line, the gate of the first switching tube connected to the first color light-emitting element in the 2+3Q row is connected to the third control signal line, and the gate of the second switching tube connected to the second color light-emitting element in the 3+3Q row is connected to the third control signal line.

4. The display panel according to claim 2, wherein: In one frame, the signals on the plurality of first control signal lines are the same; and / or, within one frame, the signals on the plurality of second control signal lines are the same; And / or, within one frame, the signals on the plurality of third control signal lines are the same.

5. The display panel according to claim 1, wherein: In one frame, the light-emitting elements in different rows that are in a light-emitting state are staggered in distribution.

6. A method for driving a display panel, characterized in that: The display panel includes a pixel circuit and a light-emitting element, and the pixel circuit includes a driving module and a gating module; the driving module is used to provide a driving current; The gating module includes N switches, wherein the first ends of the N switches are connected to the output end of the driving module, and the second ends of the N switches are respectively connected to N light-emitting elements with different luminous colors, where N is an integer greater than 1; N is 3; the N switches include a first switch tube, a second switch tube, and a third switch tube; the light-emitting elements with different luminous colors include a first color light-emitting element, a second color light-emitting element, and a third color light-emitting element; three light-emitting elements of different colors, a driving module, and a gating module constitute a pixel unit, and a gating module includes N switches; The second electrode of the first switching tube is connected to the first color light emitting element, the second electrode of the second switching tube is connected to the second color light emitting element, and the second electrode of the third switching tube is connected to the third color light emitting element; The driving method includes: In one frame, one of the N switches is controlled to be in an on state, the other switches are controlled to be in an off state, and the light-emitting elements of one color located in the same row are controlled to be in an emitting state, while the light-emitting elements located in different rows are controlled to emit different colors. In one frame, the light-emitting elements of one color located in the same row are controlled to be in a light-emitting state, and the light-emitting elements in different rows are controlled to be in a light-emitting state to emit different colors; When the duration of a frame is less than or equal to a preset threshold, controlling the N switches to be turned on frame by frame; Controlling one of the N switches to be in an on state and the other switches to be in an off state within a preset time period, wherein the preset time period includes a plurality of frames; When the duration of a frame is greater than a preset threshold, within the preset duration, one of the N switches is controlled to be in an on state, and the others are controlled to be in an off state; The N switches are controlled to be alternately turned on within different preset time periods at the first refresh rate.

7. The method according to claim 6, characterized in that The method further comprises: Controlling the N switches to be turned on frame by frame; Alternatively, within a preset time period, one of the N switches is controlled to be in an on state, and the other switches are controlled to be in an off state, and the preset time period includes a plurality of frames.

8. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 5.

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