CN112581901B - Display panel, display driving method thereof and electronic equipment - Google Patents

Display panel, display driving method thereof and electronic equipment Download PDF

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Publication number
CN112581901B
CN112581901B CN202011638406.4A CN202011638406A CN112581901B CN 112581901 B CN112581901 B CN 112581901B CN 202011638406 A CN202011638406 A CN 202011638406A CN 112581901 B CN112581901 B CN 112581901B
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China
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sub
display area
display
pixels
data
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CN202011638406.4A
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CN112581901A (en
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索磊
高娅娜
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

Abstract

The technical scheme of the application can determine whether the sub-display area meets the compensation condition based on gray scale data of sub-pixels in the sub-display area, and can carry out compensation display driving on the sub-pixels in the sub-display area meeting the compensation condition in a holding period of a current data frame and a next data frame, so that the problem of picture jitter of the display panel under low refreshing frequency can be avoided.

Description

Display panel, display driving method thereof and electronic equipment
Technical Field
The present disclosure relates to the field of electronic devices, and more particularly, to a display panel, a display driving method thereof, and an electronic device.
Background
Along with the continuous development of science and technology, more and more electronic devices with display functions are widely applied to daily life and work of people, bring great convenience to daily life and work of people, and become an indispensable important tool for people at present.
An important component of an electronic device for realizing a display function is a display panel. In the prior art, when a display panel is driven to display images, the problem of picture jitter occurs under the condition of low refresh frequency.
Disclosure of Invention
In view of this, the present application provides a display panel, a display driving method thereof, and an electronic device, where the scheme is as follows:
a display panel, the display panel comprising:
the display device comprises an array substrate, a display module and a display module, wherein the array substrate comprises a display area and a frame area surrounding the display area;
the driving controller, the scanning driving circuit and the data driving circuit are arranged in the frame area; the scanning driving circuit and the data driving circuit are respectively connected with the driving controller;
a plurality of sub-pixels arranged in an array and arranged in the display area; the sub-pixels are connected with the data driving circuit through data lines;
the display area comprises a plurality of sub-display areas, and the sub-display areas comprise a plurality of rows of sub-pixels which are arranged continuously;
the scanning driving circuit comprises a plurality of sub-scanning driving circuits which are in one-to-one correspondence with the sub-display areas, and the sub-scanning driving circuits are connected with the sub-pixels in the corresponding sub-display areas through signal lines;
and the driving controller is used for judging whether the sub-display area meets the compensation condition based on the gray scale data of the sub-pixels in the sub-display area in the current data frame, if so, controlling the sub-scanning driving circuit and the data driving circuit to carry out compensation display driving on the sub-pixels in the sub-display area in the holding period of the current data frame and the next data frame, and if not, enabling the sub-pixels in the sub-display area to hold the gray scale data of the current data frame by controlling the scanning driving circuit and the data driving circuit.
In the display panel of the technical scheme, the driving controller can determine whether the sub-display area meets the compensation condition based on the gray level data of the sub-pixels in the sub-display area, and can carry out compensation display driving on the sub-pixels in the sub-display area meeting the compensation condition in the holding period of the current data frame and the next data frame, so that the problem of picture shaking of the display panel under low refreshing frequency can be avoided.
The application also provides a display driving method of a display panel, the display panel comprises a display area and a frame area surrounding the display area, the display area is provided with a plurality of sub-pixels arranged in an array, the frame area is provided with a data driving circuit and a scanning driving circuit, the display area is provided with a plurality of sub-display areas, the sub-display areas are provided with a plurality of rows of sub-pixels arranged in a continuous mode, and the display driving method comprises the following steps:
acquiring gray scale data of sub-pixels in the sub-display area in a current data frame;
judging whether the sub-display area meets a compensation condition or not based on the gray scale data of the sub-pixels in the sub-display area in the current data frame;
if so, controlling the scanning driving circuit and the data driving circuit to perform compensation display driving for the sub-pixels in a holding period of the current data frame and the next data frame;
If not, in the holding period of the current data frame and the next data frame, the sub-pixels in the sub-display area are controlled to hold the gray scale data of the current data frame through the scanning driving circuit and the data driving circuit.
According to the display driving method, whether the sub-display area meets the compensation condition can be determined based on the gray scale data of the sub-pixels in the sub-display area, and the sub-pixels in the sub-display area meeting the compensation condition can be compensated and driven in the holding period of the current data frame and the next data frame, so that the problem of picture shaking of the display panel under the low refreshing frequency can be avoided.
The application also provides an electronic device, which is characterized by comprising: the display panel.
The electronic equipment provided by the technical scheme comprises the display panel, wherein the controller in the display panel can determine whether the sub-display area meets the compensation condition based on the gray level data of the sub-pixels in the sub-display area, and can carry out compensation display driving on the sub-pixels in the sub-display area meeting the compensation condition in the holding period of the current data frame and the next data frame, so that the problem of picture jitter of the display panel under the low refreshing frequency can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the provided drawings without inventive effort to those skilled in the art.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and should not be construed as limiting the scope of the invention, since any modification, variation in proportions, or adjustment of the size, which would otherwise be used by those skilled in the art, would not have the essential significance of the present disclosure, would not affect the efficacy or otherwise be achieved, and would still fall within the scope of the present disclosure.
FIG. 1 is a schematic diagram of a pixel circuit;
FIG. 2 is a graph of luminance versus time for an OLED display at a low refresh frequency;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
Fig. 4 is a schematic structural diagram of a sub-scanning circuit according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a first scanning circuit and a second scanning circuit according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a connection method between a sub-pixel and a data driving circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic flow chart of a display driving method according to an embodiment of the present application;
fig. 8-12 are timing diagrams provided in embodiments of the present application.
Detailed Description
Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which it is shown, and in which it is evident that the embodiments described are exemplary only some, and not all embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Taking an OLED display panel as an example, the OLED display panel has a plurality of sub-pixels, where the sub-pixels include an OLED and a pixel circuit connected with the OLED, and the pixel circuit is shown in fig. 1, fig. 1 is a schematic structural diagram of a pixel circuit, and the pixel circuit has a 7T1C structure and has first to seventh transistors M1 to M7 and a storage capacitor Cst. The embodiment of the present application is only described by taking a 7T1C pixel circuit as an example, and it is obvious that the specific structure of the pixel circuit is not limited to the mode shown in fig. 1, but may be a 3T1C structure or other structures, and the pixel circuit may be any existing circuit structure, which is not specifically limited in the embodiment of the present application.
The first electrode of the first transistor M1 is input with an anode voltage PVDD, the gate is connected to the node N5, and the second electrode is connected to the node N2. The first electrode of the second transistor M2 inputs the data signal VDATA, the gate electrode inputs the second SCAN signal SCAN2, and the gate electrode is connected to the gate electrode of the fourth transistor M4, and the second electrode is connected to the node N2. The third transistor M3 is a driving transistor, and has a gate connected to the node N1, a first electrode connected to the node N2, and a second electrode connected to the node N3. The first electrode of the fourth transistor M4 is connected to the node N1, and the second electrode is connected to the node N3. The fifth transistor M5 has a first electrode receiving the reference voltage VREF, a gate receiving the first SCAN signal SCAN1, and a second electrode connected to the node N1. The first electrode of the sixth transistor M6 is connected to the node N3, the gate inputs the emission signal EMIT, and the second electrode is connected to the node N4. The seventh transistor M7 has a first electrode input with the reference voltage VREF, a gate input with the second SCAN signal SCAN2, and a second electrode connected to the node N4. Node N4 is connected to the anode of the OLED, the cathode of which inputs the cathode voltage PVEE.
In some application areas, the power consumption of an OLED display screen can be reduced by reducing the refresh frequency. For example, with the development of OLED display panels in the field of wearable devices, the problem of power consumption becomes a bottleneck that plagues wearable devices, and a mainstream solution is to reduce the power consumption of OLED display panels by reducing the screen refresh rate. But when the refresh rate is reduced to 15Hz or even lower, a problem of picture judder is caused.
As shown in fig. 2, fig. 2 is a graph of luminance versus time of an OLED display screen at a low refresh frequency, where the horizontal axis represents time in ms (milliseconds), the vertical axis represents luminance in nits (nit), and there is a problem of picture jitter in a 255 gray scale frame hold mode at a low refresh frequency. The reason for the picture jitter is that the node N1 and node N3 potential hold time are on a side.
In order to solve the above problems, the embodiments of the present application provide a display panel, a display driving method thereof, and an electronic device, which determine, based on gray-scale data of sub-pixels in a sub-display area, whether the sub-display area meets a compensation condition, if so, control the sub-scan driving circuit and the data driving circuit in a holding period of a current data frame and a next data frame, and perform compensation display driving on the sub-pixels in the sub-display area, and if not, the driving controller controls the scan driving circuit and the data driving circuit, so that the sub-pixels in the sub-display area hold the gray-scale data of the current data frame, thereby avoiding a problem of frame shake of the display panel under a low refresh frequency.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 3, fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present application, where the display panel includes: an array substrate 11, the array substrate 11 including a display region 111 and a frame region 112 surrounding the display region 111; a driving controller 12, a scanning driving circuit 13, and a data driving circuit 14 provided in the frame area 112; the scan driving circuit 13 and the data driving circuit 14 are respectively connected with the driving controller 12; a plurality of array-arranged sub-pixels P disposed in the display area 111, the sub-pixels P being connected to the DATA driving circuit 14 through DATA lines DATA; the display area 111 includes a plurality of sub-display areas 100, and the sub-display areas 100 include a plurality of rows of the sub-pixels P arranged in succession; the scan driving circuit 13 includes a plurality of sub-scan driving circuits 131 corresponding to the sub-display areas 100 one by one, and the sub-scan driving circuits 131 are connected to the sub-pixels P in the corresponding sub-display areas 100 through signal lines 132.
The display panel according to the embodiment of the application may be an OLED display panel, and the sub-pixel P includes an OLED and a pixel circuit. In fig. 3, the display area 11 is described as being sequentially divided into four sub-display areas 100, and the number of sub-display areas 100 may be set to any number based on the requirement, and is not limited to the four shown in fig. 3.
The driving controller 12 is configured to determine, in a current data frame, whether the sub-display area 100 meets a compensation condition based on gray-scale data of a sub-pixel P in the sub-display area 100, and if so, control the sub-scan driving circuit 131 and the data driving circuit 14 to perform compensation display driving on the sub-pixel P in the sub-display area 100 in a holding period of the current data frame and a next data frame, and if not, the driving controller 12 controls the sub-scan driving circuit 131 and the data driving circuit 14 to enable the sub-pixel P in the sub-display area 100 to hold the gray-scale data of the current data frame. The gray-scale data of the current data frame is the data signal which does not refresh the sub-pixel P.
In the display panel according to the embodiment of the present application, the driving controller 12 can determine whether the sub-display area 100 meets the compensation condition based on the gray-scale data of the sub-pixels P in the sub-display area 100, and can perform compensation display driving on the sub-pixels P in the sub-display area 100 meeting the compensation condition in the holding period of the current data frame and the next data frame, so that the problem of frame shake of the display panel under the low refresh frequency can be avoided.
There is a hold period between two adjacent data frames, the hold period comprising at least one hold frame. In this embodiment of the present application, compensation display driving can be performed on the sub-display area 100 that satisfies the compensation condition in the hold frame, and the data signal is written, so that the problem of frame jitter caused by that more sub-pixel P gray scale data is compared in the sub-display area 100 that satisfies the compensation condition and the gray scale data of the current frame cannot be held is avoided.
In this embodiment, in order to reduce the width of the frame area 112, a part of the sub-scanning circuit 131 may be disposed on a first side of the display area 111, and another part of the sub-scanning circuit 131 is disposed on a second side of the display area 111, where the first side and the second side are the frame areas 112 on two opposite sides of the display area 111. As shown in fig. 3, n sub-display areas 100 are provided in the direction from the first row of sub-pixels P to the last row of sub-pixels P, the n sub-display areas being the 1 st sub-display area to the n sub-display area in order, and n being a positive integer greater than 1. The sub-scanning circuit 131 correspondingly connected with the 2j-1 sub-display area is arranged in the left side frame area, and the sub-scanning circuit 131 correspondingly connected with the 2j sub-display area is arranged in the right side frame area. j is a positive integer, and 2j is not greater than n.
As shown in fig. 3, the driving controller 12 is configured to provide an independent first SCAN start signal STV1 for each sub-SCAN driving circuit 131, to control the sub-SCAN driving circuits 131 to provide a first SCAN signal SCAN1 and a second SCAN signal SCAN2 for the sub-pixels P in the corresponding sub-display area 100, to provide an independent second SCAN start signal STV2 for each sub-SCAN driving circuit 131, and to control the sub-SCAN driving circuits 131 to provide a light emitting signal EMIT for the sub-pixels P in the corresponding sub-display area 100.
In this way, the driving controller 12 can independently control the respective sub-scanning circuits 131 to scan the respective rows of sub-pixels P in the corresponding sub-display area 100 row by row based on the first scan start signal STV1, and can also supply the emission signal EMIT by independently controlling the respective sub-scanning circuits 131 to scan the respective rows of sub-pixels P in the corresponding sub-display area 100 row by row based on the second scan start signal STV 2.
In the display panel, the subpixels P are arranged in an array. The same column of subpixels P are connected to the same DATA line DATA to input the DATA signal VDATA. The signal line 132 includes: a first scanning signal line, a second scanning signal line, and a light emitting signal line. The same sub-pixel P is connected to the same first SCAN signal line to input a first SCAN signal SCAN1. The same row of sub-pixels P are connected to the same second SCAN signal line to input a second SCAN signal SCAN2. The same row of sub-pixels P are connected to the same emission signal line to output an emission signal EMIT.
In the display panel according to the embodiment of the present application, the structure of the sub-scanning circuit 131 may be as shown in fig. 4.
As shown in fig. 4, fig. 4 is a schematic structural diagram of a sub-scanning circuit according to an embodiment of the present application, where the sub-scanning driving circuit 131 includes: a first scanning circuit 21, where the first scanning circuit 21 is configured to sequentially provide, for each row of sub-pixels P in the sub-display area 100 that is correspondingly connected, the first scanning signal SCAN1 and the second scanning signal SCAN2 based on the first scanning start signal STV1, the first scanning clock signal CK1, and the second scanning clock signal XCK1 that are input; the second scanning circuit 22 is configured to sequentially provide the emission signal EMIT for each row of the sub-pixels P in the sub-display area 100 correspondingly connected based on the second scanning start signal STV2, the third scanning clock signal CK2, and the fourth scanning clock signal XCK 2. Wherein, the phases of the first scanning clock signal CK1 and the second scanning clock signal XCK1 are opposite. The third scan clock signal CK2 and the fourth scan clock signal XCK2 have opposite phases.
The display panel of the present application is provided with n sub-display areas 100, and n sub-scan driving circuits 131. N first start signal lines may be provided for sequentially providing the respective sub-scan driving circuits 131 with the independent first scan start signals STV1, respectively. N second start signal lines may be provided for sequentially providing the respective sub-scan driving circuits 131 with the independent second scan start signals STV2, respectively. Four scan clock signal lines may be provided, which are commonly used for all the sub-scan driving circuits 131, and sequentially output the first to fourth scan clock signals.
The driving controller 12 controls each first scanning circuit 21 through the first scanning start signal STV1, the first scanning clock signal CK1 and the second scanning clock signal XCK1, and SCANs each row of sub-pixels P in the corresponding sub-display area 100 line by line through the first scanning signal SCAN1 and the second scanning signal SCAN 2. The driving controller 12 controls the second scanning circuit 22 through the second scanning start signal STV2, and the row-by-row sub-pixels P in the sub-display area 100 provide the emission signal EMIT. The driving controller 12 can display the area 100 based on the timing requirement by respective scan on signals and scan clock signals, and write data signals only for the sub-display area 100 satisfying the compensation condition. For example, the display device includes four sub-display areas 100 arranged in sequence, and the four sub-display areas 100 are set to be an area a, an area B, an area C and an area D in sequence. If it is determined that the C region satisfies the compensation condition. The compensation method can be adopted in the following two ways.
The first SCAN circuits 21 may be controlled by the first SCAN start signal STV1, the first SCAN clock signal CK1, and the second SCAN clock signal XCK1, and the sub-pixels P in the a, B, C, and D regions may be sequentially scanned line by the first SCAN signal SCAN1 and the second SCAN signal SCAN2, and in this process, the second SCAN circuits 22 may be controlled by the second SCAN start signal STV2 to sequentially supply the emission signals EMIT to the sub-pixels P in the a, B, C, and D regions. The data driving circuit 14 supplies the data signal VDATA to its corresponding sub-pixel P only when the light emitting signal EMIT is inputted when the region C is scanned, and is turned off when the regions a, B and D are scanned, and outputs no data signal VDATA.
Or, at the beginning of the hold period, the first SCAN circuits 21 are controlled by the first SCAN start signal STV1, the first SCAN clock signal CK1 and the second SCAN clock signal XCK1, the sub-pixels P in the C region are scanned row by the first SCAN signal SCAN1 and the second SCAN signal SCAN2, and in the process, the second SCAN circuits 22 are controlled by the second SCAN start signal STV2 to provide the emission signal EMIT for the sub-pixels P in the C region. The data driving circuit 14 provides the data signal VDATA for the corresponding sub-pixel P when the light emitting signal EMIT is inputted and scanned in the C area.
As shown in fig. 5, fig. 5 is a schematic structural diagram of a first scan circuit and a second scan circuit according to an embodiment of the present application, and, in combination with fig. 4 and fig. 5, in the same sub-scan circuit 131, the first scan circuit 21 includes a plurality of cascaded first shift registers. The first shift register of the first stage inputs a first scanning start signal STV1, two adjacent rows of sub-pixels P are connected to the same first shift register, and the scanning signal SCAN output by the first shift register includes: a first SCAN signal SCAN1 input for the previous row of subpixels P, and a second SCAN signal SCAN2 input for the next row of subpixels P. The second scanning circuit 22 includes a plurality of cascaded second shift registers, where the second shift registers correspond to the number of rows of the sub-pixels P in the corresponding sub-display area 100 one by one. The first shift register of the first stage inputs the second scan start signal STV2, and the light emission signal EMIT output from the second shift register of the previous stage is used as the input signal of the second shift register of the next stage.
In the manner shown in fig. 5, the case where each row of the sub-pixels P individually corresponds to one stage of the second shift register is taken as an example for explanation. In other embodiments, the second shift registers corresponding to each two rows may be provided, and in this case, in the same sub-display area 100, the number of the sub-pixels P is twice as large as the number of the second shift registers in the corresponding sub-driving circuits.
In the display panel according to the embodiment of the present application, the sub-display area 100 satisfying the compensation condition is set as a sub-display area to be compensated, and the sub-display area 100 not satisfying the compensation condition is set as a non-compensation sub-display area.
Taking the example that the display area 111 includes three sub-display areas 100 which are sequentially arranged, the three sub-display areas 100 are set to be an area a, an area B and an area C, the area a and the area C are set to be sub-display areas to be compensated which meet the compensation condition, and the area B is a non-compensation sub-display area which does not meet the compensation condition. The compensation method is described below with reference to the timing chart.
The first compensation mode is as follows: if the sub-display area to be compensated and the non-compensated sub-display area exist at the same time, the driving controller 12 is configured to control the scanning driving circuit 13 to sequentially scan all the sub-display areas 100 through the first scanning start signal STV1, the second scanning start signal STV2, the first clock signal CK1 to the fourth clock signal XCK2, and control the data driving circuit 14 to input the data signal for the sub-pixel P in the sub-display area to be compensated only when the sub-display area to be compensated is scanned.
In the first compensation mode, if the sub-display area to be compensated and the non-compensated sub-display area exist at the same time, the driving controller 12 may control the sub-scanning circuit 131 to sequentially scan all the sub-display areas 100 according to a set scanning order. For the non-compensation sub-display area, the data driving circuit 14 does not output a data signal during the scanning process of the non-compensation sub-display area, so the data signal of the sub-pixel P in the non-compensation sub-display area is not updated, and the data of the current data frame is kept in the keeping period of the current data frame and the next data frame based on the self node potential, so that the gray scale data of the current data frame is kept. For the sub-display area to be compensated, the data driving circuit 14 outputs a data signal to supply the scanned sub-pixels P with the data signal during the scanning of the sub-display area to be compensated. In this process, a data signal is written into the sub-pixel P in the display area to be compensated in the holding period, so as to overcome the problem of frame shake caused by the fact that the sub-pixel P in the display area to be compensated cannot maintain the node potential in the holding period, and the timing chart at this time can be as shown in fig. 8.
As shown in fig. 8, fig. 8 is a timing chart provided in the embodiment of the present application, in this way, a scan start signal with a start pulse is sequentially input from region a to region C, and then a sequential scan signal is generated to sequentially perform sequential scan on regions a to C. When scanning each row of sub-pixels in the A area, before the falling edge of the scanning signal, the data clock signal CKH outputs a time sequence pulse signal, the data signal is written into the corresponding data line, and when the scanning signal is an effective level pulse, the data signal is written into each row of sub-pixels in the A area. When scanning each row of sub-pixels in the B region, the data clock signal CKH is kept high, and the data driving circuit 14 does not output the data signal at this time, and the sub-pixels in the B region hold the gray scale data of the current frame. When scanning each row of sub-pixels in the C area, before the falling edge of the scanning signal, the data clock signal CKH outputs a time sequence pulse signal, the data signal is written into the corresponding data line, and when the scanning signal is an effective level pulse, the data signal is written into each row of sub-pixels in the C area. Therefore, the data signals can be written into the sub-pixels in the A area and the C area which meet the compensation conditions, and the problem of picture jitter caused by the fact that the sub-pixels in the A area and the C area cannot keep the gray scale data of the current frame is avoided.
The second compensation mode: if the sub-display area to be compensated and the non-compensation sub-display area exist at the same time, the driving controller 12 is configured to sequentially scan only the sub-display area to be compensated through the first scan start signal STV1, the second scan start signal STV2, the first clock signal CK1 to the fourth clock signal XCK2, control the scan driving circuit 13, and control the data driving circuit 14 to input data signals to the sub-pixels P in the sub-display area to be compensated when the sub-display area to be compensated is scanned.
In the second compensation mode, if the sub-display area to be compensated and the non-compensation sub-display area exist at the same time, the driving controller 12 may control the sub-scanning circuit 131 to sequentially scan all the sub-display areas to be compensated according to a set scanning sequence, the scanning start signal corresponding to the non-compensation sub-display area is set to a high level, the scanning signal and the light-emitting signal continuously output a high level, and control the data driving circuit 14 to input a data signal for the sub-pixel P in the sub-display area to be compensated when the sub-display area to be compensated is scanned, and a timing diagram at this time may be shown in fig. 9.
As shown in fig. 9, fig. 9 is another timing chart provided in the embodiment of the present application, in this way, a scanning start signal with a start pulse is provided for the a area alone, a scanning signal with a timing sequence is provided by a sub-scanning driving circuit corresponding to the a area, each row of sub-pixels in the a area is scanned line by line, before a falling edge of the scanning signal, a timing pulse signal is output by a data clock signal CKH, a data signal is written into a corresponding data line, and when the scanning signal is an active level pulse, a data signal is written into each row of sub-pixels in the a area. After the scanning of the area a is completed, the scanning start signal in the sub-scanning circuit corresponding to the area B is continuously set to a high level, the scanning signal and the light-emitting signal continuously output a high level, the data clock signal CKH is set to a high level, the data driving circuit 14 does not output a data signal at this time, and the sub-pixels in the area B keep the gray scale data of the current frame. And providing a scanning start signal with start pulse for the C area, providing a time sequence scanning signal by a sub-scanning driving circuit corresponding to the A area, scanning each row of sub-pixels in the C area line by line, outputting a time sequence pulse signal by a data clock signal CKH before the falling edge of the scanning signal, writing the data signal into a corresponding data line, and writing the data signal into each row of sub-pixels in the C area when the scanning signal is an effective level pulse. Therefore, the data signals can be written into the sub-pixels in the A area and the C area which meet the compensation conditions, and the problem of picture jitter caused by the fact that the sub-pixels in the A area and the C area cannot keep the gray scale data of the current frame is avoided. In this embodiment, the sub-scan driving circuit corresponding to each sub-display area A, B, C needs to individually set the independent first scan start signal STV1. Before the data driving circuit correspondingly outputs the data signal corresponding to the A area, outputting an effective level pulse to a first scanning start signal STV1 corresponding to the A area, and refreshing the data signal of the A area; when the data signal corresponding to the area A is completely output, outputting a direct current cut-off level to a first scanning start signal STV1 corresponding to the area B, so that a sub-scanning driving circuit corresponding to the area B outputs the direct current cut-off signal, and the sub-pixels of the area B keep the gray scale data of the current frame; before the data driving circuit correspondingly outputs the data signal corresponding to the C area, outputting an effective level pulse to a first scanning start signal STV1 corresponding to the C area, and refreshing the data signal of the C area;
If the A region to the C region are all uncompensated sub-display regions, the A region to the C region do not refresh the data signals in the holding period. At this time, the timing of the holding period may be as shown in fig. 10.
As shown in fig. 10, fig. 10 is a timing chart of another embodiment of the present application, in this manner, the scan on signal of each sub-scan driving circuit is continuously set to a high level, so that the output scan signal and the light-emitting signal are both continuously set to a high level, in this process, the data clock signal CKH is continuously set to a high level, at this time, the data driving circuit does not output the data signal, and the sub-pixels in the a region to the C region cannot refresh the data signal, so as to maintain the gray scale data of the current frame.
The first judgment mode is as follows: in the current data frame, if the average value of all the sub-pixel P gray-scale data in the sub-display area 100 is smaller than a reference threshold value, the compensation condition is satisfied, the sub-display area 100 is a sub-display area to be compensated, otherwise, the compensation condition is not satisfied, and the sub-display area 100 is a non-compensation sub-display area. The reference threshold is a positive integer less than 225.
In the first judgment manner, whether a large number of sub-pixels P with gray-scale data smaller than the reference threshold value exist can be determined by the average value of all the sub-pixels P in the sub-display area 100, if so, it is indicated that the sub-display area 100 has a problem of causing frame shake in the hold period, the sub-display area 100 is a sub-display area to be compensated, and the driving controller 12 can perform compensation display driving based on the compensation manner, so as to solve the frame shake problem.
In an embodiment of the present application, at least one holding frame may be included in the holding period. If the refresh frequency is 30Hz, there may be one hold frame between two adjacent data frames, i.e. the hold period comprises one hold frame. If the refresh frequency is 15Hz, there may be three hold frames between two adjacent data frames, i.e. the hold period comprises three hold frames.
If the hold period has one hold frame, the timing control of the hold frame at this time may be as described in the above embodiment.
If the sustain frame has a plurality of sustain frames, if the sub display area satisfies a compensation condition. And selecting one or more frames of the plurality of holding frames based on the gray-scale average value of all sub-pixels smaller than a preset gray-scale value in the sub-display area to be compensated, and refreshing the data of the sub-display area to be compensated.
Taking the example that the display area 111 includes three sub-display areas 100 which are sequentially arranged, the three sub-display areas 100 are set to be an area a, an area B and an area C, respectively, the area a is set to be a sub-display area to be compensated which satisfies the compensation condition, the area B and the area C are non-compensation sub-display areas which do not satisfy the compensation condition, and the set holding period includes three holding frames F1 to F3. At this time, the timing chart may be as shown in fig. 11 and 12.
As shown in fig. 11, fig. 11 is a further timing diagram provided in an embodiment of the present application. Data signals are written in the holding frame F1, the a region and the C region, data is not written in the B region, and data line signals are not written in the holding frame F2 and the holding frame F3, the a region, the B region and the C region. In the process, the B area is a non-compensation sub-display area, the sub-pixels in the B area always keep the gray scale data of the current data frame, and the A area and the C area need to write compensation data once in the holding frame F1, so that the gray scale data of the current data frame can be kept in the holding frames F2 and F3.
If the gray-scale average value of all the sub-pixels smaller than the first gray-scale value in the sub-display area to be compensated is smaller than the second gray-scale value, the gray-scale data of the current data frame can be maintained in the maintaining frame F2 and the maintaining frame F3 by data writing of the compensating sub-display area once in the maintaining frame F1.
As shown in fig. 12, fig. 12 is a further timing diagram provided in an embodiment of the present application. In the hold frame F1, the data signals are written in the a area and the C area, and the B area is not written with data. In the holding frame F2 and the holding frame F3, no data line signal is written in each of the a region, the B region, and the C region. In the hold frame F2, no data writing is performed in the a, B, and C areas. In the hold frame F3, the data signals are written in the a region and the C region, and the B region does not perform data writing. In this process, the B region is a non-compensation sub-display region, the sub-pixels in the B region always hold the gray-scale data of the current data frame, and the a region and the C region cannot continuously hold the gray-scale data of the current data frame in the holding frame F2 and the holding frame F3 by performing data writing once in the holding frame, so that the data needs to be written again in the holding frame F3.
If the gray-scale average value of all the sub-pixels smaller than the first gray-scale value in the sub-display area to be compensated is smaller than the second gray-scale value, the compensation sub-display area is characterized in that the data writing is performed once in the holding frame F1, the gray-scale data of the current data frame cannot be continuously held in the holding frames F2 and F3, and the data needs to be written again in the holding frame F3.
The second gray scale value is smaller than the first gray scale value, and the first gray scale value and the second gray scale value can be obtained through actual display test of the display screen.
The second judgment mode is as follows: in the current data frame, if the number of sub-pixels in the sub-display area 100 with gray-scale data smaller than the first threshold is larger than the second threshold, and the average value of all the sub-pixel gray-scale data in the sub-display area is smaller than the reference threshold, the compensation condition is satisfied, otherwise, the compensation condition is not satisfied. The first threshold is a positive integer less than 225. The second threshold is a set constant that is smaller than the total number of sub-pixels P in the sub-display area 100.
In the second determination manner, it is avoided that the sub-display area to be compensated can be accurately determined because the average value of the gray-scale data is pulled up by the plurality of sub-pixels P having higher gray-scale data in the sub-display area 100.
If the first threshold is 180, the second threshold is 50%, and the reference threshold is 150, if a sub-display area satisfies the compensation condition, it indicates that the number of sub-pixels with gray scale values smaller than 180 in the sub-display area is more than 50% of the number of all sub-pixels in the sub-display area, and the gray scale average value of all the sub-pixels is smaller than 150, it can be characterized that the sub-display area has more sub-pixels with low gray scale data, so that compensation driving display can be accurately performed on the sub-display area, and compared with the first judgment mode, it can be avoided that the gray scale data average value is pulled up due to the fact that a large number of sub-pixels P with higher gray scale data in the sub-display area 100 can be accurately determined, and the problem that compensation display cannot be accurately performed is avoided.
Third judgment mode: in the current data frame, if the average value of the gray-scale data of all the first sub-pixels in the sub-display area is not larger than a third threshold value, the compensation condition is met, otherwise, the compensation condition is not met; the first sub-pixel is a sub-pixel with gray-scale data smaller than a fourth threshold value, and the fourth threshold value is larger than the third threshold value; in the sub-display area, the number of the first sub-pixels is not smaller than a fifth threshold. The third threshold and the fourth threshold are both positive integers less than 225.
In the third determination manner, it is avoided that the sub-display area to be compensated can be accurately determined because a large number of sub-pixels P with higher gray-scale data exist in the sub-display area 100 to pull up the average value of the gray-scale data.
Fourth judgment mode: a sub-display area 100 is set to have M rows of sub-pixels P, where M is a positive integer greater than 1. The M rows of subpixels P are sequentially 1 st row subpixels to M th row subpixels, and are set:
K i ＝X i+1 -X i
wherein X is i The average value of gray-scale data of all sub-pixels P in the ith row is i, which is a positive integer, and i+1 is not more than M.
K 1 To K M-1 The absolute value of any one is larger than the set constant K 0 The sub-display area 100 satisfies the compensation barAnd if not, the compensation condition is not satisfied. K (K) 0 A constant that is greater than 0.
In the fourth determination, the brightness difference between the rows of sub-pixels P may visually cause a display judder. K (K) i The luminance fluctuation difference between the sub-pixels P in the sub-display area 100 can be characterized as a determination method of whether compensation is required.
Fifth judgment mode: setting M rows of sub-pixels in the sub-display area 100, wherein M is a positive integer greater than 1; in the current data frame, for m continuous rows of sub-pixels in the sub-display area 100, if the number of sub-pixels with gray-scale data smaller than a sixth threshold value is more than s% in the number of sub-display areas, the sub-display area satisfies the compensation condition, otherwise, the compensation adjustment is not satisfied; wherein M is a set constant greater than 1 and less than M. The sixth threshold is a positive integer less than 225.
In the fifth determination manner, it is avoided that the sub-display area to be compensated can be accurately determined because the average value of the gray-scale data is pulled up by the plurality of sub-pixels P having higher gray-scale data in the sub-display area 100.
In the embodiment of the present application, the respective thresholds may be set based on the compensation accuracy, which is not specifically limited in the embodiment of the present application. The number of rows of sub-pixels P in different sub-display areas 100 may be the same or different.
As shown in fig. 3, in the display panel, the sub-pixels P of each column may be directly connected to the DATA driving circuit 14 through the DATA lines DATA. In this manner, the data driving circuit 14 needs to have a data interface corresponding to one sub-pixel column.
In order to reduce the number of data interfaces in the data driving circuit 14, in other ways, the sub-pixels P in each column may be connected through the gate circuit 31 and the data driving circuit 14 as shown in fig. 6.
As shown in fig. 6, fig. 6 is a schematic diagram of a connection manner of the sub-pixels P and the DATA driving circuit according to the embodiment of the present application, in this manner, each column of the sub-pixels P is connected to a separate DATA line DATA, and the DATA line DATA is connected to the DATA driving circuit 14 through a gate circuit 31.
Y adjacent DATA lines DATA are connected to the same DATA output pin of the DATA driving circuit 14 through the gate circuit 31, and two adjacent DATA output pins D1 and D2 are output in fig. 6. The driving controller 12 controls the switching state of the gate circuit 31 by Y data clock signals, Y being a positive integer greater than 1.
In the embodiment shown in fig. 6, y=6 is taken as an example, so that six DATA lines DATA arranged in succession are connected to the same DATA output pin through the strobe circuit 31. Six data clock signal lines are provided, and first clock signals CKH1 to CKH6 are sequentially outputted. The value of Y may be set based on demand, which is not particularly limited in the embodiments of the present application.
The gate circuit 31 includes a plurality of sub-gate circuits 32, and each sub-gate circuit 32 includes Y gate switches 321. In the same sub-gate circuit 32, the first electrode of the gate switch is connected to the same DATA output pin, the second electrode is connected to one DATA line DATA, and the gate is connected to a plurality of different DATA clock signals.
Aiming at the problem of low refresh frequency picture jitter, the technical scheme of the embodiment of the application is based on the principle that the gray-scale data holding time of the sub-pixel P is longer under the condition of higher brightness (larger writing data signal) and shorter under the condition of lower brightness (larger writing data signal), and the compensation display driving is performed on the sub-display area 100 meeting the compensation condition in the display panel, so that the problem of picture jitter can be reduced or even avoided. And power consumption reduction to achieve the compensation scheme.
Based on the above embodiment, another embodiment of the present application further provides a display driving method of a display panel, where the display panel includes a display area and a frame area surrounding the display area, the display area has a plurality of sub-pixels arranged in an array, the frame area has a data driving circuit and a scan driving circuit, the display area has a plurality of sub-display areas, the sub-display areas have a plurality of rows of sub-pixels arranged in succession, and the structure of the display panel may be described with reference to the above embodiment, which is not repeated.
Fig. 7 is a schematic flow chart of a display driving method according to an embodiment of the present application, where the method includes:
step S11: and acquiring gray scale data of sub-pixels in the sub-display area in the current data frame.
Step S12: and judging whether the sub-display area meets a compensation condition or not based on the gray scale data of the sub-pixels in the sub-display area in the current data frame.
Step S13: and if so, controlling the scanning driving circuit and the data driving circuit to carry out compensation display driving for the sub-pixels in the holding period of the current data frame and the next data frame.
Step S14: if not, in the holding period of the current data frame and the next data frame, the sub-pixels in the sub-display area are controlled to hold the gray scale data of the current data frame through the scanning driving circuit and the data driving circuit.
The first judgment mode, the method for judging whether the compensation condition is satisfied comprises the following steps: in the current data frame, if the average value of the gray-scale data of all the sub-pixels in the sub-display area is smaller than a reference threshold value, the compensation condition is satisfied, otherwise, the compensation condition is not satisfied.
In this compensation method, a display panel is provided with N rows of subpixels in total. The gray scale data of the 1 st row sub-pixel to the N th row sub-pixel in the current data frame are shown in the table below. Any adjacent three columns of subpixels emit different colors, including: a column of red subpixels R, a column of blue subpixels B, and a column of green subpixels G. If the display panel has four sub-display areas, the four sub-display areas are set to be an area A, an area B, an area C and an area D respectively in the directions from the 1 st column to the N-th column, and the corresponding average values are a, B, C and D respectively.
When compensation display driving is carried out, in the process of displaying and driving the current data frame, acquiring a data signal of the current data frame, storing the data signal of the current data frame, judging whether the average value of a sub-display area is smaller than a set reference threshold value, if so, carrying out compensation display driving on sub-pixels in the sub-display area, and if not, keeping gray scale data of the current data frame on the sub-pixels in the sub-display area.
The second method for judging whether the compensation condition is satisfied comprises the following steps: in the current data frame, if the number of the sub-pixels of which the gray-scale data is smaller than the first threshold value in the sub-display area is larger than the second threshold value and the average value of the gray-scale data of all the sub-pixels in the sub-display area is smaller than the reference threshold value, the compensation condition is met, otherwise, the compensation condition is not met.
The third judging mode, the method for judging whether the compensation condition is satisfied comprises the following steps: in the current data frame, if the average value of the gray-scale data of all the first sub-pixels in the sub-display area is not larger than a third threshold value, the compensation condition is met, otherwise, the compensation condition is not met; the first sub-pixel is a sub-pixel with gray-scale data smaller than a fourth threshold value, and the fourth threshold value is larger than the third threshold value; in the sub-display area, the number of the first sub-pixels is not smaller than a fifth threshold.
The fourth judgment mode, the method for judging whether the compensation condition is satisfied, comprises the following steps: a sub-display area 100 is set to have M rows of sub-pixels P, where M is a positive integer greater than 1. The M rows of subpixels P are sequentially 1 st row subpixels to M th row subpixels, and are set:
K i ＝X i+1 -X i
Wherein X is i The average value of gray-scale data of all sub-pixels P in the ith row is i, which is a positive integer, and i+1 is not more than M.
K 1 To K M-1 The absolute value of any one is larger than the set constant K 0 The sub-display area 100 satisfies the compensation condition, otherwise, the compensation condition is not satisfied. K (K) 0 A constant that is greater than 0.
The fifth judging mode, the method for judging whether the compensation condition is satisfied comprises: setting M rows of sub-pixels in the sub-display area 100, wherein M is a positive integer greater than 1; in the current data frame, for m continuous rows of sub-pixels in the sub-display area 100, if the number of sub-pixels with gray-scale data smaller than a sixth threshold value is more than s% in the number of sub-display areas, the sub-display area satisfies the compensation condition, otherwise, the compensation adjustment is not satisfied; wherein M is a set constant greater than 1 and less than M. The sixth threshold is a positive integer less than 225.
In the display driving method of the embodiment of the present application, a sub-display area satisfying the compensation condition is set as a sub-display area to be compensated, and a sub-display area not satisfying the compensation condition is set as a non-compensation sub-display area; and if the sub-display area to be compensated and the non-compensation sub-display area exist at the same time, scanning all the sub-display areas sequentially, and inputting data signals for sub-pixels in the sub-display area to be compensated only when the sub-display area to be compensated is scanned.
In the mode, if the sub-display area to be compensated and the non-compensation sub-display area exist at the same time, only the sub-display area to be compensated is scanned sequentially, and when the sub-display area to be compensated is scanned, data signals are input for sub-pixels in the sub-display area to be compensated.
The compensation scheme of the present application will be further described below based on a specific timing diagram.
The display panel is provided with four sub-display area areas which are respectively an A area, a B area, a C area and a D area and are sequentially arranged, wherein 6 adjacent data lines are connected with the same data output pin of the data driving circuit through the gating circuit, and the display panel is provided with six data clock signals which are sequentially CKH1 to CKH6. The refresh frequency is set to be F Hz.
In the display driving method, whether the sub-display area meets the compensation condition can be determined based on the gray scale data of the sub-pixels in the sub-display area, and the sub-pixels in the sub-display area meeting the compensation condition can be compensated and driven in the holding period of the current data frame and the next data frame, so that the problem of picture jitter of the display panel under the low refresh frequency can be avoided.
Based on the above embodiment, another embodiment of the present application further provides an electronic device, where the display panel is described in the above embodiment. The electronic device may be a wearable device such as a smart watch, smart glasses, or other low refresh rate (refresh rate not greater than 15 Hz) display device.
The controller in the display panel can determine whether the sub-display area meets the compensation condition based on the gray level data of the sub-pixels in the sub-display area, and can carry out compensation display driving on the sub-pixels in the sub-display area meeting the compensation condition in the holding period of the current data frame and the next data frame, so that the problem of picture jitter of the display panel under the low refresh frequency can be avoided.
In the present specification, each embodiment is described in a progressive manner, or a parallel manner, or a combination of progressive and parallel manners, and each embodiment is mainly described as a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. The display driving method and the electronic device disclosed in the embodiments correspond to the method disclosed in the embodiments, so that the description is simpler, and the relevant parts are only needed to be described with reference to the corresponding parts of the display panel.
It should be noted that, in the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present application. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in an article or apparatus that comprises such element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (16)

1. A display panel, the display panel comprising:
the display device comprises an array substrate, a display module and a display module, wherein the array substrate comprises a display area and a frame area surrounding the display area;
the driving controller, the scanning driving circuit and the data driving circuit are arranged in the frame area; the scanning driving circuit and the data driving circuit are respectively connected with the driving controller;
a plurality of sub-pixels arranged in an array and arranged in the display area; the sub-pixels are connected with the data driving circuit through data lines;
the display area comprises a plurality of sub-display areas, and the sub-display areas comprise a plurality of rows of sub-pixels which are arranged continuously;
the scanning driving circuit comprises a plurality of sub-scanning driving circuits which are in one-to-one correspondence with the sub-display areas, and the sub-scanning driving circuits are connected with the sub-pixels in the corresponding sub-display areas through signal lines;
and the driving controller is used for judging whether the sub-display area meets the compensation condition based on the gray scale data of the sub-pixels in the sub-display area in the current data frame, if so, controlling the sub-scanning driving circuit and the data driving circuit to carry out compensation display driving on the sub-pixels in the sub-display area in the holding period of the current data frame and the next data frame, and if not, enabling the sub-pixels in the sub-display area to hold the gray scale data of the current data frame by controlling the sub-scanning driving circuit and the data driving circuit.
2. The display panel according to claim 1, wherein the driving controller is configured to provide independent first scan on signals for each of the sub-scan driving circuits to control the sub-scan driving circuits to provide first scan signals and second scan signals for the sub-pixels in the corresponding sub-display area, and to provide independent second scan on signals for each of the sub-scan driving circuits to control the sub-scan driving circuits to provide light-emitting signals for the sub-pixels in the corresponding sub-display area.
3. The display panel according to claim 2, wherein the sub-scan driving circuit includes:
the first scanning circuit is used for sequentially providing the first scanning signal and the second scanning signal for each row of sub-pixels in the corresponding connected sub-display area based on the input first scanning start signal, the first scanning clock signal and the second scanning clock signal;
and the second scanning circuit is used for sequentially providing the luminous signals for each row of sub-pixels in the corresponding connected sub-display area based on the second scanning start signal, the third scanning clock signal and the fourth scanning clock signal.
4. A display panel according to claim 3, wherein the sub-display area satisfying the compensation condition is set as a sub-display area to be compensated, and the sub-display area not satisfying the compensation condition is set as a non-compensation sub-display area;
and if the sub-display area to be compensated and the non-compensation sub-display area exist at the same time, the driving controller is used for controlling the scanning driving circuit to scan all the sub-display areas sequentially through the first scanning starting signal, the second scanning starting signal, the first scanning clock signal to the fourth scanning clock signal, and controlling the data driving circuit to input data signals for sub-pixels in the sub-display area to be compensated only when the sub-display area to be compensated scans.
5. A display panel according to claim 3, wherein the sub-display area satisfying the compensation condition is set as a sub-display area to be compensated, and the sub-display area not satisfying the compensation condition is set as a non-compensation sub-display area;
and if the sub-display area to be compensated and the non-compensation sub-display area exist at the same time, the driving controller is used for controlling the scanning driving circuit to scan the sub-display area to be compensated in sequence only through the first scanning starting signal, the second scanning starting signal, the first scanning clock signal to the fourth scanning clock signal, and controlling the data driving circuit to input data signals for sub-pixels in the sub-display area to be compensated when the sub-display area to be compensated scans.
6. The display panel of claim 2, wherein in the current data frame, the compensation condition is satisfied if a mean value of all the sub-pixel gray scale data in the sub-display area is less than a reference threshold value, and the compensation condition is not satisfied otherwise.
7. The display panel of claim 2, wherein in the current data frame, the compensation condition is satisfied if the number of sub-pixels in the sub-display area for which the gray-scale data is less than a first threshold is greater than a second threshold and the average value of all the sub-pixel gray-scale data in the sub-display area is less than a reference threshold, and otherwise the compensation condition is not satisfied.
8. The display panel according to claim 2, wherein in the current data frame, the compensation condition is satisfied if a mean value of gray-scale data of all first sub-pixels in the sub-display area is not greater than a third threshold value, and the compensation condition is not satisfied otherwise;
the first sub-pixel is a sub-pixel with gray-scale data smaller than a fourth threshold value, and the fourth threshold value is larger than the third threshold value; in the sub-display area, the number of the first sub-pixels is not smaller than a fifth threshold.
9. The display panel of claim 7, wherein each column of the subpixels is connected to a separate data line, the data line being connected to the data driving circuit through a gate circuit;
y adjacent data lines are connected with the same data output pin of the data driving circuit through the gating circuit, the driving controller controls the switching state of the gating circuit through Y data clock signals, and Y is a positive integer larger than 1.
10. A display driving method of a display panel, wherein the display panel includes a display area having a plurality of sub-pixels arranged in an array and a frame area surrounding the display area, the frame area has a data driving circuit and a scan driving circuit, the display area has a plurality of sub-display areas having a plurality of rows of the sub-pixels arranged in succession, the display driving method comprising:
acquiring gray scale data of sub-pixels in the sub-display area in a current data frame;
judging whether the sub-display area meets a compensation condition or not based on the gray scale data of the sub-pixels in the sub-display area in the current data frame;
if so, controlling the scanning driving circuit and the data driving circuit to perform compensation display driving for the sub-pixels in a holding period of the current data frame and the next data frame;
If not, in the holding period of the current data frame and the next data frame, the sub-pixels in the sub-display area are controlled to hold the gray scale data of the current data frame through the scanning driving circuit and the data driving circuit.
11. The display driving method according to claim 10, wherein the method of judging whether the compensation condition is satisfied comprises:
in the current data frame, if the average value of the gray-scale data of all the sub-pixels in the sub-display area is smaller than a reference threshold value, the compensation condition is satisfied, otherwise, the compensation condition is not satisfied.
12. The display driving method according to claim 10, wherein the method of judging whether the compensation condition is satisfied comprises:
in the current data frame, if the number of the sub-pixels of which the gray-scale data is smaller than the first threshold value in the sub-display area is larger than the second threshold value and the average value of the gray-scale data of all the sub-pixels in the sub-display area is smaller than the reference threshold value, the compensation condition is met, otherwise, the compensation condition is not met.
13. The display driving method according to claim 10, wherein the method of judging whether the compensation condition is satisfied comprises: in the current data frame, if the average value of the gray-scale data of all the first sub-pixels in the sub-display area is not larger than a third threshold value, the compensation condition is met, otherwise, the compensation condition is not met;
The first sub-pixel is a sub-pixel with gray-scale data smaller than a fourth threshold value, and the fourth threshold value is larger than the third threshold value; in the sub-display area, the number of the first sub-pixels is not smaller than a fifth threshold.
14. The display driving method according to claim 10, wherein a sub-display region satisfying the compensation condition is set as a sub-display region to be compensated, and a sub-display region not satisfying the compensation condition is set as a non-compensation sub-display region;
and if the sub-display area to be compensated and the non-compensation sub-display area exist at the same time, scanning all the sub-display areas sequentially, and inputting data signals for sub-pixels in the sub-display area to be compensated only when the sub-display area to be compensated is scanned.
15. The display driving method according to claim 10, wherein a sub-display region satisfying the compensation condition is set as a sub-display region to be compensated, and a sub-display region not satisfying the compensation condition is set as a non-compensation sub-display region;
and if the sub-display area to be compensated and the non-compensation sub-display area exist at the same time, only scanning the sub-display area to be compensated in sequence, and inputting data signals for sub-pixels in the sub-display area to be compensated when the sub-display area to be compensated is scanned.
16. An electronic device, comprising: the display panel of any one of claims 1-9.
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