Display panel, driving method thereof and display device

Abstract

The invention discloses a display panel, a driving method thereof and a display device.The display panel comprises a pixel circuit and a light-emitting element, a driving module is used for providing driving current, a gating module comprises N switches, the first ends of the N switches are connected with the output end of the driving module, and the second ends of the N switches are connected with the output end of the gating module. The second ends of the N switches are respectively connected with N light-emitting elements with different light-emitting colors, and in one frame, only one switch is switched on, the light-emitting elements with the same light-emitting color in the same row emit light, and the light-emitting elements in the light-emitting state in different rows have different light-emitting colors. By connecting one driving circuit with N switches, light-emitting elements with different colors can be driven in a time-sharing manner, the light-emitting elements with different colors can be lightened in the same frame, the color halo phenomenon caused by only driving a single-color pixel in each sub-frame time period is avoided, the color halo problem can be solved while the resolution ratio is improved, and the light-emitting efficiency is improved. And the watching comfort and experience of the user are improved.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular, relates to a display panel and 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, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[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 a driving method thereof, and a display device, which solve the halo phenomenon caused by driving only a single color pixel in each sub-frame time period, can solve the halo problem while improving the resolution, and improve 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 a driving current;

[0007] A gating module, comprising 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 with different light-emitting colors, where N is an integer greater than 1;

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

[0009] In a 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 have 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 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;

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

[0013] In a possible implementation manner of the first aspect, the gate of each switch tube is respectively 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 gate of the first switch connected to the first color light emitting element in the 1+3Qth row is connected to the first control signal line, the gate of the second switch connected to the second color light emitting element in the 2+3Qth row is connected to the first control signal line, and the gate of the third switch connected to the third color light emitting element in the 3+3Qth row is connected to the first control signal line, where Q is an integer greater than or equal to 0;

[0016] The gate of the second switch connected to the second color light emitting element in the 1+3Qth row is connected to the second control signal line, the gate of the third switch connected to the third color light emitting element in the 2+3Qth row is connected to the second control signal line, and the gate of the first switch connected to the first color light emitting element in the 3+3Qth row is connected to the second control signal line;

[0017] The gate of the third switch 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 switch 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 switch 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 a 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 in distribution.

[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 length, one of the N switches is in an on state, and the other switches are in an off state, and the preset time length 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 used to provide a driving current;

[0028] 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 light-emitting 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 light-emitting state, and the light-emitting elements in different rows are controlled to have different light-emitting colors.

[0031] In a possible implementation manner 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 manner 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 manner of the second aspect, the method further includes: within a frame, controlling the light-emitting elements with staggered distribution located in different rows to be in a light-emitting state.

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

[0040] In a possible implementation of the second aspect, the method also 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, the display device comprising the display panel described in any one of the embodiments of the first aspect.

[0043] The display panel and driving method thereof and the display device of the embodiment of the present application, wherein the display panel includes a pixel circuit and a light-emitting element, the 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, N is an integer greater than 1, and, in one frame, one of the N switches is in an on state, the other switches are in an off state, the light-emitting elements of one luminous color located in the same row are in a luminous state, and the luminous colors of the light-emitting elements in different rows are different. By connecting a driving circuit to N switches, light-emitting elements of different colors can be driven in time-sharing, and light-emitting elements of different colors can be lit in the same frame, avoiding the halo phenomenon caused by driving only a single color pixel in each subframe time period, and solving the halo problem while improving the resolution, thereby improving the viewing comfort and experience of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solution 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 Pixel provided in an embodiment of the present application;

[0047] Figure 2 A schematic diagram of the structure of another pixel 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 light emission 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] Fig. 9 A schematic diagram of the structure 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 switch tube; 122-second switch tube; 123-third switch 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 only 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 article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0059] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0060] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present 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 the 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 the OLED display panel requires a corresponding driving circuit to drive the OLED pixel. The number of wirings and the number of driving circuits are large, resulting in a single light-emitting unit, that is, a light-emitting unit composed of an OLED pixel and a corresponding driving circuit, occupying a large area, causing the problem of low PPI resolution of the display panel.

[0063] In some prior arts, from the perspective of hardware circuit structure, the ratio of the number of driving circuits and display pixels is changed from the original 1:1 to 1:3, that is, one driving circuit corresponds to three display pixels, which reduces the number of wiring and the number of driving circuits, reduces the occupied area of ​​a single light-emitting unit, and improves the resolution PPI of the display panel. However, when the prior art performs pixel driving, only sub-pixels of the same color are lit at the same time, for example, only R_OLED emits light during the first subframe, only G_OLED emits light during the second subframe, and only B_OLED emits light during the third subframe. The inventor has found that the prior art is only suitable for scenes with high refresh rates, such as scenes with high refresh rates of >180HZ, but in scenes with normal refresh rates, such as scenes with refresh rates of 60 to 180HZ, due to the slow switching speed of the three monochrome images, a halo phenomenon will occur, causing the user to feel dizzy, affecting the user's viewing comfort, and reducing the user's experience. The inventors further discovered that in low refresh rate scenarios, such as refresh rate <60HZ, when users are watching the screen, the display screen will show obvious alternation of red, green and blue images, which is a serious abnormality, greatly affecting the viewing comfort of users and seriously affecting the user experience. Therefore, the prior art has the problem of color halo at normal refresh rate and display abnormality at low refresh rate, because each subframe can only drive a single color pixel, which affects the viewing comfort and experience of users.

[0064] Based on this, the embodiments of the present application provide a display panel and a driving method thereof, 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 various 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, such as Figure 1-b As shown, each pixel unit Pixel includes a pixel circuit 10 and a light emitting element 20, and the pixel circuit 10 includes a driving module 11 for providing a driving current;

[0067] The gating module 12 includes N switches, 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 light-emitting colors, where N is an integer greater than 1;

[0068] Among them, within one frame, one of the N switches is in the on state, and the other switches are in the 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 for short, has n rows and m columns of pixels Pixel in the display area of ​​the display panel 100 , and 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, wherein one frame is a data refresh frame, and within a data refresh frame, the driving modules connected to the multiple rows of light-emitting elements are refreshed row by row, in other words, the driving modules connected to the multiple rows of light-emitting elements write data signals row by row.

[0071] Specifically, 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 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, and a 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, 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 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 time-sharing, and light-emitting elements of different colors can be lit in the same frame, avoiding the halo phenomenon caused by driving only a single color pixel in each subframe time period, and can solve the halo problem while improving the resolution, thereby improving the viewing comfort and experience of users.

[0074] In some embodiments, 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 have different luminous colors;

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

[0076] Preferably, you can continue to refer to Figure 2 , the N switches include a first switch tube 121, a second switch tube 122, and a third switch tube 123; the 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 switch tube refers to a switch tube connected to the first color light emitting element, and the switch tube can be called the first switch tube, and there can be multiple first switch tubes; the second switch tube refers to a switch tube connected to the second color light emitting element, and the switch tube can be called the second switch tube, and there can be multiple second switch tubes; the third switch tube refers to a switch tube connected to the third color light emitting element, and the switch tube can be called the third switch tube, and there can be multiple third switch tubes. For example, the switch tube connected to the R-OLED is the first switch tube, the switch tube connected to the G-OLED is the second switch tube, and the switch tube connected to the B-OLED is the third switch tube.

[0080] Specifically, in a data refresh frame, the driving modules corresponding to the connected light-emitting elements in multiple rows write data signals row by row, and the driving modules connected to the light-emitting elements in the same row write data signals corresponding to the light-emitting elements of the same light-emitting color, and the driving modules connected to the light-emitting elements in different rows write data signals corresponding to the light-emitting elements of different light-emitting colors. In other words, only one color of the light-emitting elements in the same row are in a light-emitting state, and the light-emitting colors of the light-emitting elements in different rows are different. For example, only the red light-emitting elements in the first row of pixels are in a light-emitting state, only the green light-emitting elements in the second row of pixels are in a light-emitting state, only the blue light-emitting elements in the third row of pixels are in a light-emitting state, and only the red light-emitting elements in the fourth row of pixels are in a light-emitting state, and so on. By connecting a driving circuit to N switches, light-emitting elements of different colors can be driven in time-sharing, and light-emitting elements of three colors of R, G, and B in different rows can be lit in the same frame, avoiding the halo phenomenon caused by driving only a single color pixel in each subframe time period, and solving the halo problem while improving the resolution, thereby improving the viewing comfort and experience of users.

[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, Figure 3 As shown, the gate of each switch tube in the pixel circuit 10 is respectively 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 gate of the first switch connected to the first color light emitting element in the 1+3Qth row is connected to the first control signal line, the gate of the second switch connected to the second color light emitting element in the 2+3Qth row is connected to the first control signal line, and the gate of the third switch connected to the third color light emitting element in the 3+3Qth row is connected to the first control signal line, where Q is an integer greater than or equal to 0;

[0085] The gate of the second switch connected to the second color light emitting element in the 1+3Qth row is connected to the second control signal line, the gate of the third switch connected to the third color light emitting element in the 2+3Qth row is connected to the second control signal line, and the gate of the first switch connected to the first color light emitting element in the 3+3Qth row is connected to the second control signal line;

[0086] The gate of the third switch 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 switch 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 switch tube connected to the second color light emitting element in the 3+3Q row is connected to the third control signal line.

[0087] Specifically, Figure 3 As shown, Figure 3 The figure shows the connection between the switch tubes of "different rows" and the control signal lines when N=3, and takes the pixels Pixel_11, Pixel_21, and Pixel_31 of the first three rows of the first column in the display panel as an example. The first control signal line S1 is respectively connected to the first switch tube 121 that controls the first row of R-OLED, the second switch tube 122 that controls the second row of G-OLED, and the third switch tube 123 that controls the third row of B-OLED. In other words, the first control signal line S1 can control the R-OLEDs of the 1st, 4th, 7th, ... rows, control the G-OLEDs of the 2nd, 5th, 8th, ... rows, and control the B-OLEDs of the 3rd, 6th, 9th, ... rows to emit light. Similarly, the second control signal line S2 can control the G-OLEDs in the 1st, 4th, 7th, ... rows, the B-OLEDs in the 2nd, 5th, 8th, ... rows, and the R-OLEDs in the 3rd, 6th, 9th, ... rows to emit light; the third control signal line S3 controls the B-OLEDs in the 1st, 4th, 7th, ... rows, the R-OLEDs in the 2nd, 5th, 8th, ... rows, and the G-OLEDs in the 3rd, 6th, 9th, ... rows to emit light. Thus, 1 / 3 of the RGB light-emitting elements in the full screen can be controlled by the same control signal line, that is, 1 / 3 of the RGB light-emitting elements in the full screen can be lit up by the same control signal line, so that the screen displays 1 / 3 of the picture; by time-sharing control of the S1, S2, S3 control signal lines, different 1 / 3 of the RGB light-emitting elements in the full screen can be lit up respectively, so as to realize the switching of three pictures, so that the human eye can superimpose them into 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 may 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 found that in order to further improve the resolution, the signals on multiple first control signal lines can be controlled to be the same within one frame, so only one control signal needs to be led out 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, and the pin can continuously output a constant high level or a constant low level within one 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 led out to control multiple second control signal lines, and only one control signal needs to be led out to control multiple third control signal lines, which further simplifies the circuit. Compared with the need for n signals to be applied to n first control signal lines, n signals to be applied to n second control signal lines, and n signals to be applied 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, the second control signal lines, and the 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, the number of control signal lines is greatly reduced, the number of control signals is reduced, the control logic is simple, resources are saved, and the resolution of the display panel is further improved.

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

[0093] Specifically, the pixels Pixel_11, Pixel_21, and Pixel_31 in the first column and the first three rows of the display panel are taken as an example for description. Figure 4 As shown, Figure 4 FIG. 1 is a schematic diagram of the luminescence of the pixels in the first three rows of the first column in a data refresh frame T1 provided by an embodiment of the present application. In the first frame T1, the first control signal line S1 is activated, 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 5The schematic diagram of the overall luminescence of the display panel within a data refresh frame T1 provided by the embodiment of the present application, within a data refresh frame T1, the S1 signal line is activated, the R-OLEDs of the 1st, 4th, 7th... rows are illuminated, the G-OLEDs of the 2nd, 5th, 8th... rows are illuminated, and the B-OLEDs of the 3rd, 6th, 9th... rows are illuminated. 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, the R, G, and B light-emitting elements of different rows can be lit, avoiding the halo phenomenon caused by driving only a single color pixel in each subframe time period, and solving the halo problem while improving the resolution, thereby improving the viewing comfort and experience of the user.

[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 duration 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 duration 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, the number of light-emitting elements that emit light in one frame is 1 / 3 of the number of all light-emitting elements, and three frames are combined into 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 inventor has found that by synthesizing and displaying an image through three frames, for example, in the first frame: S1 works, lighting up 1 / 3 of RGB; in the second frame: S2 works, lighting up the remaining 1 / 3 of RGB; in the third frame: S3 works, lighting up the last 1 / 3 of RGB, the light-emitting elements of R, G, and B in different rows can be lit in the same frame, which solves the problem of color halo at normal refresh rate and display abnormality at low refresh rate caused by each subframe of the prior art that can only drive a single color pixel, thereby improving the viewing comfort and experience of users. The inventor has further found that in the case of a relatively fast refresh, the human eye will superimpose the three frames together, but in the case of a low refresh rate, if the three frames are still used for switching, flickering abnormality will occur, and the human eye cannot superimpose the three frames well together, so it can maintain a fixed state without switching the screen, that is, during one frame, only one control line of S1, S2, and S3 works, and only 1 / 3 of RGB is fixedly lit. Although some resolution is sacrificed, it can be displayed normally, 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 switch tubes in the pixel circuit is in a continuously on state, and the other switch 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 inventor has found that, under low refresh rates, only 1 / 3 of the light-emitting elements are fixedly lit, and the remaining light-emitting elements are not emitting light, which will cause differences in the light-emitting time of the light-emitting elements, resulting in poor life balance of the light-emitting elements. As time goes by, the differences in the light-emitting time of the light-emitting elements become more and more obvious. Therefore, the switching frequency of S1, S2, and S3 can be changed from one frame to a preset duration, wherein the preset duration may include multiple frames. That is to say, 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 works within one frame; under low refresh rates, only one of S1, S2, and S3 can be kept fixed to work, which can avoid abnormal flickering, or it can be switched every preset duration, and one of S1, S2, and S3 works within a preset duration, but the switching frequency of S1, S2, and S3 is slowed down, so that the life of the light-emitting elements can be balanced while avoiding abnormal flickering, thereby extending the service life of the entire display panel.

[0106] In one embodiment, N switches are alternately turned on within different preset time lengths under the first refresh rate, which means that when the refresh rate is less than 60HZ, S1 is effective for a period of time, S2 is effective for a period of time, and S3 is effective for a period of time. For example, when the refresh rate is less than 60HZ, S1 is effective, and then the cumulative time of S1 being effective can be detected. When the continuous cumulative time of S1 being effective exceeds the preset time length, it is switched to S2 being effective, and the time of S1 being effective is reset to zero. When the continuous cumulative time of S2 being effective exceeds the preset time length, it is switched to S3 being effective, and the time of S2 being effective is reset to zero. When the continuous cumulative time of S3 being effective exceeds the preset time length, it is switched back to S1 being effective, and the time of S3 being effective is reset to zero. 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 lit; within the second preset time period, the second switch tube is turned on and only another 1 / 3 of the OLED is lit; within the third preset time period, the third switch tube is turned on and only the remaining 1 / 3 of the OLED is lit. This cycle can avoid abnormal flickering caused by switching between different screens at low refresh rates, balance the light-emitting 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 driving method of the display panel provided in the embodiment of the present application may include:

[0109] S510, within one frame, one of the N switches is controlled to be in the on state, 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 are controlled to have different light-emitting colors.

[0110] Specifically, in a single frame time, only one switch among the N switches of a pixel circuit is turned on, and controls the light-emitting elements of one color in the same row to emit light. For example, the first switch tube can control the red light-emitting element in the first row to emit light, the green light-emitting element in the second row to emit light, and the blue light-emitting element in the third row to emit light. In the same frame, the light-emitting elements of R, G, and B in different rows can be lit up, avoiding the halo phenomenon caused by driving only a single color pixel in each subframe time period, and can solve the halo problem while improving the resolution, thereby improving the viewing comfort and experience of users.

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

[0112] S511, controlling N switches to be turned on frame by frame, within one frame, controlling one of the N switches to be in an on state, controlling the other switches to be in an off state, and controlling light emitting elements of one color located in the same row to be in an emitting state, and controlling light emitting elements in different rows to be in an emitting state to emit different colors;

[0113] Alternatively, S152, within a preset time length, 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 length includes multiple frames; 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, and 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 that are in a light-emitting state are controlled to have different 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 the 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 the light-emitting elements in three frames can be turned on, and the three frames can be combined into a complete picture. This solves the problem of color halo at normal refresh frequency and display abnormality at low refresh frequency caused by the prior art that only a single color pixel can be driven in each 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 length, that is, within multiple frame times, which can solve the abnormal flickering problem under low refresh rate.

[0117] It should be noted that the preset duration is the continuous cumulative duration of a single control signal line being effective, and the preset duration can be greater than the duration of a frame. The preset duration can be set according to demand, such as 1 hour or 10 minutes, and is not limited in the embodiments of the present application. For example, the preset duration is 10 minutes, and the cumulative duration of the display panel being at a low refresh rate in a day is 5 hours. Within these 5 hours, the cumulative effective time of each control line S1, S2, and S3 is switched to each other once every 10 minutes. By calculating the cumulative time, the life of the light-emitting element 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 the same;

[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 one frame, the signals on multiple first control signal lines can be controlled to be the same, so only one control signal is needed to simultaneously control multiple first control signal lines, the control logic is simple and reliable, less resources are occupied, and the resolution of the display panel is further improved. 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, which reduces the number of control signals, makes the control logic simple and reliable, saves resources, and reduces the number of wirings, further improving the resolution of the display panel.

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

[0124] Specifically, within one frame time, a control signal line is activated to control the 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, there are light-emitting elements of three colors, R, G, and B, which are equivalent to the three columns of pixels recombining 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: 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.

[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, and 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 a 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, thereby avoiding abnormal flickering under low refresh rates.

[0130] Within different preset time lengths under the first refresh rate, N switches are turned on alternately, which means that within different preset time lengths, 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 length, the remaining 1 / 3 of the light-emitting elements emit light within the second preset time length, and the last 1 / 3 of the light-emitting elements emit light within the third preset time length, and so on. This can avoid abnormal flickering while balancing the lifespan of the light-emitting elements and extend the service life of the entire display panel.

[0131] Fig. 9 It 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 addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

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

[0135] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A display panel, characterized in that: The invention comprises a pixel circuit and a light-emitting element, wherein the pixel circuit comprises: A driving module, used for providing a driving current; A gating module, comprising 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 light-emitting colors, where N is an integer greater than 1; Among them, within 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 an emitting state have different colors.

2. The display panel according to claim 1, characterized in that: In one frame, the light emitting elements of one light emitting 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 have different light emitting colors; Preferably, N is 3; Preferably, 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 switch tube is connected to the first color light emitting element, the second electrode of the second switch tube is connected to the second color light emitting element, and the second electrode of the third switch tube is connected to the third color light emitting element.

3. The display panel according to claim 2, characterized in that: The gate of each of the switch tubes is respectively 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; Preferably, the gate of each of the switch tubes is connected to different control signal lines respectively, including: The gate of the first switch tube connected to the first color light emitting element in the 1+3Qth row is connected to the first control signal line, the gate of the second switch tube connected to the second color light emitting element in the 2+3Qth row is connected to the first control signal line, and the gate of the third switch tube connected to the third color light emitting element 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 gate of the second switch tube connected to the second color light emitting element in the 1+3Qth row is connected to the second control signal line, the gate of the third switch tube connected to the third color light emitting element in the 2+3Qth row is connected to the second control signal line, and the gate of the first switch tube connected to the first color light emitting element in the 3+3Qth row is connected to the second control signal line; The gate of the third switch 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 switch 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 switch 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 3, characterized in that: 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, characterized in that: In one frame, the light-emitting elements in different rows that are in a light-emitting state are staggered in distribution.

6. The display panel according to claim 1, characterized in that: The N switches are turned on frame by frame; 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.

7. The display panel according to any one of claims 1 to 5, characterized in that: 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 a plurality of frames; 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; Preferably, within different preset time periods at the first refresh rate, the N switches are turned on alternately.

8. A method for driving a display panel, characterized in that: The display panel comprises a pixel circuit and a light-emitting element, wherein the pixel circuit comprises a driving module and a gating module; the driving module is used to provide a driving current; The gating module comprises 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 light-emitting colors, where N is an integer greater than 1; The driving method comprises: 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 light-emitting state, and the light-emitting elements in different rows are controlled to have different light-emitting colors.

9. The method according to claim 8, 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.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 7.

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