CN115223501B - Drive compensation circuit, compensation method and display device - Google Patents

Drive compensation circuit, compensation method and display device Download PDF

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Publication number
CN115223501B
CN115223501B CN202211000964.7A CN202211000964A CN115223501B CN 115223501 B CN115223501 B CN 115223501B CN 202211000964 A CN202211000964 A CN 202211000964A CN 115223501 B CN115223501 B CN 115223501B
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display
compensation
brightness
module
control module
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CN202211000964.7A
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Chinese (zh)
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CN115223501A (en
Inventor
黄佩迪
郑浩旋
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HKC Co Ltd
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HKC Co Ltd
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Priority to CN202211000964.7A priority Critical patent/CN115223501B/en
Publication of CN115223501A publication Critical patent/CN115223501A/en
Priority to PCT/CN2022/142510 priority patent/WO2024036864A1/en
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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
    • G09G3/22—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]
    • G09G3/3225—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] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • 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
    • G09G2320/0257—Reduction of after-image effects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The application relates to a driving compensation circuit, a compensation method and a display device. The driving compensation circuit comprises a time sequence control module, a driving module, a control module and a data compensation module which are electrically connected with the display panel. The time sequence control module obtains the display time of a plurality of display blocks of the display panel and transmits the display time to the control module. The control module obtains a brightness attenuation difference value according to the display time and transmits the brightness attenuation difference value to the time sequence control module and the data compensation module. The data compensation module obtains compensation data according to the brightness attenuation difference value and transmits the compensation data to the driving module. The time sequence control module controls the driving module to display and compensate partial display blocks of the display panel when the display panel is in an unused state according to the compensation data according to the brightness attenuation difference value. In the driving compensation circuit, a control module and a data compensation module are arranged to obtain a brightness attenuation difference value so as to perform display compensation on a part of display blocks, so that the problem that residual images appear on display pictures due to different aging speeds of different luminescent materials is solved.

Description

Drive compensation circuit, compensation method and display device
Technical Field
The present disclosure relates to display technologies, and in particular, to a driving compensation circuit, a compensation method for the driving compensation circuit, and a display device including the driving compensation circuit.
Background
With the development of display technology and the updating of screens in the optoelectronic display industry, an Organic Light-Emitting Diode (OLED) display screen gradually enters the public field of view, and the OLED display screen is increasingly popular in applications with the advantages of no need of backlight, good flexibility, wide viewing angle, uniform image quality, fast reaction speed, rich colors and the like, and is most remarkable in products such as mobile phones, media players, small entrance televisions and the like. The OLED display screen utilizes current to trigger the self-luminous element to emit light, and mainly drives the organic semiconductor material and the luminous material to emit light after carrier injection and recombination through an electric field, so that a backlight plate is not needed.
However, since the self-attenuation rates of the materials of the different self-luminous elements are different, the aging of the different self-luminous elements is inconsistent under the same current after long-time use, so that the brightness of part of the luminous elements is insufficient, and the problem of afterimage of a display picture is easily caused.
Disclosure of Invention
In view of the shortcomings of the prior art, an object of the present application is to provide a driving compensation circuit, a compensation method and a display device. And setting a control module and a data compensation module in the driving compensation circuit to obtain the brightness attenuation difference value of each display block. And then the brightness attenuation difference value is utilized to carry out display compensation on part of the display blocks so as to balance the problem of afterimage of the display picture caused by different aging speeds of the luminescent materials of different display blocks, thereby effectively improving the display effect and the display taste of the display device.
In a first aspect, the present application provides a driving compensation circuit, including a timing control module and a driving module electrically connected to a display panel, where the timing control module drives the driving module to control the display panel to display a picture. The driving compensation circuit further comprises a control module and a data compensation module, wherein the control module is electrically connected with the time sequence control module and the data compensation module, and the data compensation module is also electrically connected with the driving module;
the time sequence control module acquires display time of a plurality of display blocks of the display panel and transmits the display time to the control module; the control module obtains a plurality of brightness attenuation difference values according to a plurality of display times, and transmits the brightness attenuation difference values to the time sequence control module and the data compensation module; the data compensation module obtains compensation data according to the brightness attenuation difference values and transmits the compensation data to the driving module;
and the time sequence control module controls the driving module to display and compensate partial display blocks of the display panel when the display panel is in an unused state according to the compensation data according to the brightness attenuation difference value.
In some embodiments, the control module pre-stores luminance attenuation rates of different luminescent materials corresponding to different initial luminescent luminances, and the control module is configured to obtain luminance attenuation values of display times corresponding to each block according to the luminance attenuation rates and the display times; the control module is further configured to compare each of the luminance attenuation values with the preset attenuation value according to a plurality of luminance attenuation values corresponding to a display block of the display panel display dynamic picture, and obtain a plurality of luminance attenuation difference values according to a comparison result, where the luminance attenuation difference values include information representing compensation time and compensation luminance.
In some embodiments, the preset attenuation value is an average value of a plurality of brightness attenuation values corresponding to a display block of the display dynamic picture.
In some embodiments, when the absolute value of the brightness attenuation value is greater than the absolute value of the preset attenuation value, the brightness attenuation difference value is a negative value, and the control module transmits the brightness attenuation difference value to the data compensation module and the timing control module;
when the absolute value of the brightness attenuation value is smaller than or equal to the absolute value of the preset attenuation value, the brightness attenuation difference value is a non-negative value, and the display compensation is not required to be carried out on the display block of the display panel corresponding to the brightness attenuation difference value.
In some embodiments, the driving module includes a data driving module and a scanning driving module, the data driving module and the scanning driving module are electrically connected with the timing control module, the data compensation module and the display panel, and the timing control module drives the scanning driving module to scan the corresponding display block according to the brightness attenuation difference value; the time sequence control module controls the data driving module to transmit power supply signals to the corresponding display blocks according to the compensation data according to the brightness attenuation difference value, and further performs display compensation on the corresponding display blocks of the display panel.
In some embodiments, the driving compensation circuit further includes an external compensation module electrically connected to both the display panel and the data driving module, wherein the external compensation module stores a power supply voltage and a threshold voltage of a transistor for driving the light emitting element to emit light;
the external compensation module is used for acquiring anode voltage of a light-emitting element of the display panel and current flowing through the light-emitting element, calculating a correction value of image data according to the acquired current, the anode voltage, the power supply voltage and the threshold voltage, and transmitting the correction value to the data driving module, wherein the data driving module corrects part of sub-pixel units of the display panel according to the correction value.
In some embodiments, the display compensation means to control the display area of the display panel to perform low gray scale display so that the brightness attenuation value of the display area is equal to a preset attenuation value.
In a second aspect, the present application further provides a compensation method, the compensation method including:
obtaining brightness attenuation rates of different luminescent materials corresponding to different initial brightness;
acquiring the display time of each display block of the display panel through a time sequence control module;
obtaining a brightness attenuation difference value according to the brightness attenuation rate and the display time of each display block through a control module;
and obtaining compensation data according to the brightness attenuation difference value, and carrying out display compensation on part of display blocks of the display panel according to the brightness attenuation difference value and the compensation data.
In some embodiments, the obtaining the luminance decay rate of different luminescent materials corresponding to different initial luminances includes:
determining a plurality of different said luminescent materials;
controlling each luminescent material to emit light for preset time corresponding to different initial brightness;
and measuring the final brightness of each luminescent material after the preset time of luminescence, and obtaining the brightness attenuation rates of different luminescent materials corresponding to different initial brightness according to the initial brightness, the final brightness and the preset time.
In some embodiments, the obtaining, by the control module, a luminance decay difference value according to the luminance decay rate and the display time of each display block includes:
acquiring a plurality of brightness attenuation values corresponding to different display blocks according to the received display times by the control module;
acquiring a preset attenuation value according to a plurality of brightness attenuation values corresponding to a display block of a display dynamic picture through the control module;
and comparing each brightness attenuation value with the preset attenuation value through the control module, and obtaining a plurality of brightness attenuation difference values according to a comparison result.
In a third aspect, the present application further provides a display device, where the display device includes a display panel and the driving compensation circuit described above, and the driving compensation circuit is configured to perform display compensation on the display panel.
In summary, in the driving compensation circuit, the compensation method and the display device provided by the application, the control module and the data compensation module are arranged in the driving compensation circuit, and the display time of each display block is obtained through the time sequence control module, so that the brightness attenuation value of each display block is obtained, and the brightness attenuation difference value of each display block is obtained. And then the brightness attenuation difference value is utilized to carry out display compensation on part of the display blocks so as to balance the problem of afterimage of the display picture caused by different aging speeds of the luminescent materials of different display blocks, thereby prolonging the service life of the display panel. The display effect and the display taste of the display device are effectively improved. Further, the display effect and the service life of the display device are also effectively improved. In addition, the problem of manufacturing cost increase caused by the fact that the display picture residual image is overcome by increasing the area of the sub-pixels in the prior art is also solved, so that the attenuation rate and the aging rate of the R, G, B luminous element are kept consistent as much as possible by confirming the attenuation rates of different luminous elements, the problem of the picture residual image caused by different attenuation rates and aging rates is avoided, and the manufacturing cost is lower.
Drawings
Fig. 1 is a schematic diagram of a light emitting element according to an embodiment of the present disclosure;
FIG. 2 is a graph showing the decay of the luminance of the light emitting device of FIG. 1 with time and the cathode voltage;
fig. 3 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a sub-pixel unit in the display panel shown in FIG. 3;
FIG. 5 is a schematic diagram of a functional structure of a driving compensation circuit according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of another driving compensation circuit according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of a driving compensation circuit according to another embodiment of the present disclosure;
FIG. 8 is a schematic flow chart of a compensation method disclosed in an embodiment of the present application;
FIG. 9 is a flowchart of step S10 of the compensation method shown in FIG. 8;
fig. 10 is a flowchart of step S30 of the compensation method shown in fig. 8.
Reference numerals illustrate: 1000-a display device; 10-a display panel; 15-sub-pixel units; 151-a light emitting element; 20-a power module; 100. 200, 300-driving compensation circuits; 30-a support frame; 40-a timing control module; 50-a control module; 60-a data compensation module; 70-driving the module; 71-a data driving module; 72-a scan driving module; 201-a system interface circuit; 202-a command decoder; 203-an image data storage module; 204-gray generator; 205-gamma corrector; 310-an external compensation module; f1-a first direction; f2-a second direction; S1-Sn-scanning lines; D1-Dm-data lines; t1-a first transistor; t2-second transistor; cg—storage capacitance; S10-S40, a compensation method; S11-S13, S10 in the compensation method; S31-S33-step of S30 in the compensation method.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments that can be used to practice the present application. The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated. Directional terms referred to in this application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are merely directions referring to the attached drawings, and thus, directional terms are used for better, more clear description and understanding of the present application, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context. It should be noted that the terms "step 1", "step 2", and the like in the description and claims of the present application and the drawings are used for distinguishing between different objects and not for describing a particular sequential order. The terms first, second and the like in the description and in the claims of the present application and in the drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprises," "comprising," "includes," "including," "may be" or "including" as used in this application mean the presence of the corresponding function, operation, element, etc. disclosed, but not limited to other one or more additional functions, operations, elements, etc. Furthermore, the terms "comprises" or "comprising" mean that there is a corresponding feature, number, step, operation, element, component, or combination thereof disclosed in the specification, and that there is no intention to exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof. It will also be understood that the meaning of "at least one" as described herein is one and more, such as one, two or three, etc., and the meaning of "a plurality" is at least two, such as two or three, etc., unless specifically defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Referring to fig. 1, fig. 1 is a schematic diagram of a light emitting device according to an embodiment of the disclosure. As shown in fig. 1, the light-emitting element may mainly include an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and a cathode, which are stacked in this order. In an embodiment of the present application, the Light Emitting element may be an Organic Light Emitting Diode (OLED).
It is understood that the light emission of the organic light emitting diode is mainly driven by an electric field, and the organic semiconductor material and the light emitting material realize light emission after carrier injection and recombination. In the embodiment of the application, an Indium Tin Oxide (ITO) glass transparent electrode is used as an anode of the organic light emitting diode, and a metal electrode is used as a cathode of the organic light emitting diode. The cathode of the organic light emitting diode is electrically connected to the negative electrode of the power supply, and the anode of the organic light emitting diode is electrically connected to the positive electrode of the power supply. Electrons are transported from the cathode of the organic light emitting diode to the light emitting layer through the electron transport layer by the driving of the power supply, and holes are injected from the anode of the organic light emitting diode to the light emitting layer through the hole injection layer and the hole transport layer. Then, the electron and the hole generate exciton after meeting the light emitting layer, so that the light emitting molecule is excited, and a light source is generated after radiation.
Referring to fig. 2, fig. 2 is a decay chart of the light-emitting brightness of the light-emitting device shown in fig. 1 with time and cathode voltage. As shown in fig. 2, the abscissa axis represents time, the main ordinate axis represents the cathode voltage of the light emitting element, and the minor ordinate axis represents the luminance of the light emitting element. The two curves in the figure are obtained with a constant current supplied to the light emitting element by the power supply.
The light-emitting element is a self-luminous element, and has a thin film of an organic compound on the surface thereof. As can be seen from the graph, the cathode voltage of the light emitting element gradually increases and the luminance gradually decreases with time, which is caused by the decay. When a display panel is manufactured by using such a light emitting element, a part of the display screen is approximately fixed, and when a fixed area on the screen is always displayed for a long time, the attenuation speed of the light emitting material of the light emitting element corresponding to the part of the area exceeds that of other dynamic screen parts, and the aging speed of the light emitting material is also increased. When the material is attenuated, the luminous efficiency of the material is low, and the brightness of the material is reduced under the same driving current; after a period of time, afterimages appear.
In this way, the light-emitting efficiency of the light-emitting element in the corresponding region of the fixed screen is reduced, and the luminance of the light-emitting element in this region is gradually reduced under the same current driving as before, and after a certain period of time, an afterimage appears, thereby affecting the display effect and taste.
It will be appreciated that the luminance decay of the light emitting element is also caused by other factors such as temperature.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a display device 1000 according to an embodiment of the disclosure. As shown in fig. 3, the display device 1000 provided in this embodiment of the present application may at least include a display panel 10, a power module 20 and a support frame 30, wherein the display panel 10 is fixed to the support frame 30, and the power module 20 is disposed on a back surface of the display panel 10, that is, a non-display surface of the display panel 10, that is, a side of the display panel 10 facing away from a user. The display panel 10 is used for displaying images, the power module 20 is electrically connected with the display panel 10 and is used for providing power supply voltage for displaying images of the display panel 10 rows, and the support frame 30 provides support and protection for the display panel 10 and the power module 20.
It will be appreciated that the display panel 10 also has a display surface disposed opposite the non-display surface, i.e. the front surface of the display panel 10, i.e. the side of the display panel 10 facing the user. The display surface is for facing a user using the display device 1000 to display an image.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a sub-pixel unit 15 in the display panel 10 shown in fig. 3. As shown in fig. 4, in the embodiment of the present application, the display panel 10 includes a plurality of Scan lines S1-Sn (Scan lines) extending along the first direction F1 and a plurality of Data lines D1-Dm (Data lines) extending along the second direction F2, which are disposed in a grid shape with each other. The first direction F1 and the second direction F2 are perpendicular to each other, and the scan lines S1-Sn, the data lines D1-Dm, and the scan lines S1-Sn and the data lines D1-Dm are insulated from each other. That is, the plurality of scan lines S1-Sn are arranged at intervals along the second direction F2 and are insulated from each other, the plurality of data lines D1-Dm are arranged at intervals along the first direction F1 and are insulated from each other, and the plurality of scan lines S1-Sn are insulated from the plurality of data lines D1-Dm.
The intersections of the plurality of scan lines S1 to Sn and the data lines D1 to Dm are each provided with a sub-pixel unit 15. Specifically, the sub-pixel units 15 are disposed between any two adjacent scanning lines and any two adjacent data lines, the sub-pixel units 15 located in the same column are all electrically connected with the same data line, and the sub-pixel units 15 located in the same row are all electrically connected with the same scanning line. In this embodiment, a plurality of the sub-pixel units 15 are distributed in an array.
In the embodiment of the present application, the sub-pixel unit 15 includes a first transistor T1, a second transistor T2, a storage capacitor Cg, and a light emitting element 151, where the first transistor T1 is used as a switch for addressing, and the second transistor T2 is used for providing a driving current for the light emitting element 151. The storage capacitor Cg is used to store an input image data voltage.
When the display panel 10 displays, the scan signal at the second potential is sequentially applied to each row of scan lines to turn on the first transistor T1, and the Data signal Data on the Data line is written into the storage capacitor Cg to be stored. The voltage of the storage capacitor Cg controls the opening of the second transistor T2 to control the magnitude of the current flowing through the light emitting element 151.
In addition, when a scan signal at a first potential is applied to a scan line, the first transistor T1 is turned off, and the voltage of the storage capacitor Cg is used to maintain the operation state of the second transistor T2, so as to maintain the light emitting element 151 to emit light continuously until the next scan period arrives.
In an exemplary embodiment, when a low level scan signal is applied to the 1 st row scan line, the first transistor T1 is turned on, and a data signal on a data line is written into the storage capacitor Cg to be stored; the voltage of the storage capacitor Cg controls the opening of the second transistor T2 to realize current control over the light emitting element 151. When the row 1 scan line applies a high-level scan signal, the first transistor T1 is turned on, and the voltage of the storage capacitor Cg is used to maintain the second transistor T2 to operate, so as to keep the light emitting element 151 continuously emitting light until the next scan period arrives.
Referring to fig. 5, fig. 5 is a schematic functional structure diagram of a driving compensation circuit 100 according to an embodiment of the disclosure. As shown in fig. 5, the present application provides a drive compensation circuit 100, the drive compensation circuit 100 including:
the timing control module 40 is electrically connected to the display panel 10, and is configured to obtain display time of a plurality of display blocks of the display panel 10.
The control module 50 is electrically connected to the timing control module 40, and the timing control module 40 transmits a plurality of display times to the control module 50. The control module 50 obtains a plurality of corresponding luminance attenuation differences according to the received display times. Wherein the luminance decay difference value comprises information characterizing the compensation time and the compensation luminance. The control module 50 transmits the luminance decay difference to the timing control module 40.
The data compensation module 60 is electrically connected to the control module 50, and the control module 50 further transmits a plurality of the luminance attenuation differences to the data compensation module 60. The data compensation module 60 is configured to obtain corresponding compensation data according to the received luminance attenuation difference values.
The driving module 70 is electrically connected to the timing control module 40, the data compensation module 60 and the display panel 10, and the data compensation module 60 obtains compensation data according to the received luminance attenuation differences and transmits the compensation data to the driving module 70. The timing control module 40 drives the driving module 70 to display and compensate the corresponding display block according to the compensation data when the display panel 10 is in an unused state (i.e. in a screen-off state or a power-off state) according to the luminance attenuation difference value.
In this embodiment, the driving compensation circuit 100 includes a timing control module 40 and a driving module 70, the driving module 70 is electrically connected to the timing control module 40 and the display panel 10, and the timing control module 40 drives the driving module 70 to control the display panel 10 to display images. The driving compensation circuit 100 further includes a control module 50 and a data compensation module 60, the control module 50 is electrically connected to the timing control module 40, the data compensation module 60 is electrically connected to the control module 50 and the driving module 70 at the same time, and the timing control module 40 is electrically connected to the display panel 10.
The timing control module 40 is configured to obtain display times of a plurality of display blocks of the display panel 10, and transmit the display times to the control module 50;
the control module 50 obtains a plurality of brightness attenuation differences according to the received display times, wherein the brightness attenuation differences comprise information representing compensation time and compensation brightness, and the control module 50 transmits the brightness attenuation differences to the timing control module 40 and the data compensation module 60;
The data compensation module 60 is configured to obtain compensation data according to the received luminance attenuation differences, and transmit the compensation data to the driving module 70.
When the display panel 10 is in an unused state (i.e., in a screen-off state or a power-off state), the timing control module 40 controls the driving module 70 to perform display compensation on a portion of the display blocks of the display panel 10 according to the compensation data according to the brightness attenuation difference value.
In the embodiment of the present application, the display panel 10 is divided into a plurality of display blocks, and each display block includes a plurality of sub-pixel units 15. Accordingly, each display block includes a number of light emitting elements 151 equal to or multiple of the number of sub-pixel units 15.
In the process of performing the screen display by using the display panel 10 normally, the timing control module 40 obtains the display time of each display block. Specifically, the counting module of the timing control module 40 counts the display time of each display block to obtain the display time corresponding to each block.
The specific embodiments will be described by taking 1920×1080 screen resolution of the display panel 10 as an example. In the embodiment of the present application, the display panel 10 may be divided into 10 display blocks, and the number of the sub-pixel units 15 in each display block is 192×108. Correspondingly, each display block may include 192×108 light emitting elements 151. In the process that the user normally uses the display panel 10 to display the picture, the timing control module 40 obtains the display time of each display area of the display panel 10. Specifically, the counting module of the timing control module 40 counts the display time of each display block to obtain the display time corresponding to each block.
In the embodiment of the present application, the timing control module 40 may be a timing controller (T-CON), which is not specifically limited in this application.
In this embodiment, the control module 50 stores the luminance attenuation rate Lx of different luminescent materials corresponding to different initial luminance in advance. Wherein the luminance decay rate is a luminance decay rate of the luminescent material per unit time.
In this embodiment, the control module 50 may obtain the luminance attenuation value of each block corresponding to the display time according to the luminance attenuation rate Lx and the display time of each block.
Since the display blocks corresponding to the fixed frame display have a faster luminance decay rate than the display blocks corresponding to the dynamic frame display, the control module 50 sets a decay value according to the luminance decay values of the display blocks corresponding to the dynamic frame display. The preset attenuation value may be an average value of a plurality of brightness attenuation values corresponding to a display block displaying the dynamic picture, which is not particularly limited in the present application.
In the embodiment of the present application, the preset attenuation value is obtained only according to the brightness attenuation value of the display block displaying the dynamic picture, and the absolute value of the preset attenuation value obtained according to the absolute value of the brightness attenuation value of the display block displaying the dynamic picture is smaller because the absolute value of the brightness attenuation value is smaller. Further, the obtained preset attenuation value is higher, the efficiency of obtaining the preset attenuation value is improved, meanwhile, more display blocks with unbalanced brightness attenuation values are compensated, the uniformity of the brightness attenuation values of the display blocks of the display panel is higher, and the display effect is improved.
For example, if one display panel 10 is divided into 5 blocks, the luminance degradation value of each block is 1%,1.2%,1.3%, 2.1%. Wherein, 1%,1.2% and 1.3% are brightness attenuation values of the display blocks corresponding to the display dynamic picture, and 2.1% are brightness attenuation values of the display blocks corresponding to the display fixed picture.
If the preset attenuation value obtained by directly averaging the brightness attenuation values (i.e., 1%,1.2%,1.3%, 2.1%) of all the display blocks of the display panel 10 is 1.54%, it is necessary to perform display compensation on the display blocks having the brightness attenuation values of 2.1% and 2.1%, so that the compensation value of the corresponding display block is equal to 1.54%. After compensation, the brightness decay values of the display panels were 1%,1.2%,1.3%,1.54% and 1.54%.
If the preset attenuation value obtained by averaging the brightness attenuation values (i.e., 1%,1.2%, 1.3%) of the corresponding display blocks of the display dynamic picture is 1.16%, then display compensation is required for the display blocks having the brightness attenuation values of 1.2%,1.3%,2.1% and 2.1%, so that the compensation value of the corresponding display block is equal to 1.16%. After compensation, the brightness attenuation value of the display panel is 1%,1.16%,1.16%,1.16%,1.16%.
The compensated brightness attenuation value can be used for averaging the brightness attenuation value of the corresponding display block of the display dynamic picture to obtain a preset attenuation value, so that the display compensation is performed on the display block of the display panel 10, and the brightness attenuation degree of the obtained display panel is more uniform. Further, the display effect of the display panel 10 is further improved.
The control module 50 is further configured to compare each brightness attenuation value with the preset attenuation value, and obtain a plurality of brightness attenuation differences, where the brightness attenuation differences are differences between the brightness attenuation value and the preset attenuation value.
When the absolute value of the brightness attenuation value is larger than the absolute value of the preset attenuation value, the brightness attenuation difference value is a negative value. When the absolute value of the brightness attenuation value is smaller than or equal to the absolute value of the preset attenuation value, the brightness attenuation difference value is a non-negative value.
In this embodiment, when the luminance attenuation difference is a negative value, the control module 50 transmits the luminance attenuation difference to the data compensation module 60 and the timing control module 40, where the luminance attenuation difference is used for performing display compensation on the display block corresponding to the luminance attenuation difference.
In this embodiment, when the luminance attenuation difference is a non-negative value, the display compensation is not required for the display block of the display panel 10 corresponding to the luminance attenuation difference.
In this embodiment, the data compensation module 60 is configured to output compensation data to the driving module 70 according to the received brightness attenuation difference. Further, the driving module 70 performs display compensation on the corresponding display block according to the compensation data.
In the embodiment of the present application, the driving module 70 includes a data driving module 71 and a scan driving module 72. The data driving module 71 and the scan driving module 72 are respectively and simultaneously electrically connected with the timing control module 40, the data compensation module 60 and the display panel 10.
Wherein, the timing control module 40 drives the scan driving module 72 to scan the corresponding display block according to the compensation data according to the compensation time contained in the brightness attenuation difference value; the timing control module 40 controls the data driving module 71 to transmit power signals to the corresponding display blocks according to the compensation data according to the compensation brightness included in the brightness attenuation difference, so as to perform display compensation on the corresponding display blocks of the display panel 10.
In this embodiment of the present application, display compensation may refer to performing low-gray display on a display block with a negative brightness attenuation difference value, so that the brightness attenuation value of the display block is equal to a preset attenuation value. The low gray scale display may also be referred to as a rest screen display. So that the brightness attenuation value of the display block is consistent with the brightness attenuation value of other areas. Further, the decaying brightness values of each display area of the display panel 10 are balanced, and the aging speeds of the different light emitting elements 151 are balanced, so as to improve the technical effect of the display panel 10 for displaying images. The display compensation is performed when the display device 1000 is in an unused state, that is, when the display device 1000 is in a screen-off state or a power-off state. It will be appreciated that the user may set the specific time for the display device 1000 to compensate, which is not particularly limited in this application.
It is understood that the low gray display or the off-screen display means that the display panel is made to emit light in a case where it cannot be easily found by the naked eye of the user, and the light emitting element 151 is further aged.
In the embodiment of the application, the time for performing display compensation on the display panel can be confirmed by setting the specific time of the non-use period by the user.
In the specific embodiment of the present application, for example, a certain display panel may be often used for drawing a picture or writing a file, and the status bar, toolbar, and the like of the use interface of the display panel display a fixed picture for a long time.
When the user is in use, each display block of the display panel 10 continuously transmits back the working data to the timing control module 40 to indicate the working state, and the timing control module 40 obtains the display time according to the received working data and transmits the display time to the control module 50 for data processing.
The control module 50 obtains the brightness attenuation value of each display block according to the received display time and the brightness attenuation rate Lx. And comparing the brightness attenuation value with the preset attenuation value to obtain a brightness attenuation difference value. The control module 50 transmits the luminance decay difference to the timing control module 40 and the data compensation module 60.
The data compensation module 60 can also output corresponding compensation data to the driving module 70 according to the received brightness attenuation difference value. Further, the driving module 70 performs display compensation on the corresponding display block according to the compensation data.
In the embodiment of the present application, the control module 50 and the data compensation module 60 are disposed in the driving compensation circuit 100, and the timing control module 40 obtains the display time of each display block of the display panel 10, so as to obtain the brightness attenuation value of each display block. And the brightness attenuation difference value is utilized to carry out display compensation on part of the display blocks so as to balance the problem of afterimage of the display picture caused by different aging speeds of the luminescent materials of different display blocks.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating a structure of another driving compensation circuit 200 according to an embodiment of the disclosure. As shown in fig. 6, in the embodiment of the present application, the driving compensation circuit 200 is different from the driving compensation circuit 100 in the previous embodiment in that the driving compensation circuit 200 may further include a system interface circuit 201, a command decoder 202, an image data storage module 203, a gray scale generator 204, a gamma (gamma) corrector 205, and the like. Specifically, the system interface circuit 201 is configured to receive data and commands, and store the received data and commands. The system interface circuit 201 may include a microprocessor (Microprocessor Unit, MPU) interface module for transmitting image display data and commands between a system control and a display screen, and an instruction register module electrically connected to the microprocessor interface module for storing the image display data and naming, which is not particularly limited in this application.
The command decoder 202, the image data storage module 203 and the timing control module 40 are all electrically connected to the system interface circuit 201. The command decoder 202 is configured to decode a command received by the system interface circuit 201 and convert the command into a machine language that can be recognized by the display device 1000. The image data storage module 203 is used for storing image data for display.
The gray-scale generator 204 is electrically connected to the image data storage module 203, and is configured to generate a gray-scale signal. The gamma corrector 205 is electrically connected to the gray-scale generator 204 and the data driving module 71, and the gamma corrector 205 is configured to correct gray-scale signals and transmit the corrected gray-scale signals to the data driving module 71.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating a structure of a driving compensation circuit 300 according to an embodiment of the disclosure. As shown in fig. 7, in the embodiment of the present application, the driving compensation circuit 300 is different from the driving compensation circuit 200 in the previous embodiment in that the driving compensation circuit 300 may further include an external compensation module 310, and the external compensation module 310 is electrically connected to both the display panel 10 and the data driving module 71.
The external compensation module 310 is configured to obtain an anode voltage of the light emitting element 151 and a current flowing through the light emitting element 151 in the display panel 10, the anode voltage being data reflecting an aging degree of the light emitting element 151. Specifically, the external compensation module 310 may include an Analog-to-Digital Converter (ADC) and a memory, and the anode voltage is stored in the memory after being subjected to data processing by the ADC. Meanwhile, the memory also stores a power supply Voltage (VDD) and a threshold voltage (Vth) of a driving transistor for driving the light emitting element to emit light. The external compensation module 310 calculates a correction value of the image data according to the obtained current, anode voltage, power supply Voltage (VDD), and threshold voltage (Vth), the external compensation module 310 outputs the correction value of the image data to the data driving module 71, and the data driving module 71 corrects a portion of the sub-pixel units 15 of the display panel 10 according to the correction value.
In this embodiment of the present application, the external compensation module 310 is configured to perform compensation on a portion of the sub-pixel units 15 of the display panel 10, so as to compensate for the display time of different display blocks obtained by the control module 50 and the data compensation module 60 according to the timing control module 40, and the luminance attenuation difference value obtained by the luminance attenuation rate stored in advance, so that after performing display compensation on a portion of the display blocks of the display panel 10 according to the luminance attenuation difference value, the problem that each block of the display panel 10 still has uneven aging degree with a small amplitude still exists.
Referring to fig. 8, fig. 8 is a flow chart of a compensation method according to an embodiment of the disclosure. Based on the same concept, the embodiments of the present application further provide a compensation method, where the compensation method is used for the driving compensation circuit described in any of the embodiments, and the content of the driving compensation circuit related to the compensation method in the embodiments of the present application is referred to the related description of the driving compensation circuit in the embodiments described above, and is not repeated herein. The compensation method may comprise at least the following steps.
Step S10, obtaining brightness attenuation rates Lx of different luminescent materials corresponding to different initial brightness.
Referring to fig. 9 together, fig. 9 is a flowchart illustrating a step S10 of the compensation method shown in fig. 8. In the embodiment of the present application, step S10 may specifically further include the following steps.
Step S11, determining a plurality of different luminescent materials.
In the embodiment of the present application, the light emitting material in step S11 may be determined according to the light emitting material applied in the display panel 10, which is not particularly limited in the present application.
In the specific embodiment of the present application, the luminance decay rate Lx may be selectively measured for the luminescent materials corresponding to the R, G, B three sub-pixels.
And step S12, controlling each luminescent material to emit light for preset time corresponding to different initial brightness.
In the embodiment of the present application, it is understood that the larger the driving current employed for each light emitting element 151, the higher the light emission luminance, and the more serious the luminance decay. Each of the luminescent materials may be realized by driving the luminescence with a different driving current corresponding to a different initial luminance. Wherein the test conditions are the same except for the driving current parameter.
In the specific embodiment of the present application, the initial brightness of each luminescent material is controlled to be 300 nit (nit), 500nit, 800nit, 1200nit, etc. Wherein nit is a unit of brightness, representing the brightness of candelas per square meter, used to define the subjective sensation of brightness for the observer.
It will be appreciated that the more initial luminance values of the luminescent material are counted, the more luminance decay values are obtained by the test, and the higher the accuracy in compensation. In addition, the initial luminance may be determined according to the display panel 10 using a larger amount of light-emitting luminance, which is not particularly limited in the present application.
In the embodiment of the present application, the preset time may be 1000 hours, or other values may be selected according to actual needs, which is not specifically limited in the present application.
And S13, measuring the final brightness of each luminescent material after the preset time, and obtaining brightness attenuation rates Lx of different luminescent materials corresponding to different initial brightness according to the initial brightness, the final brightness and the preset time.
In this embodiment of the present application, the initial brightness and the final brightness of each luminescent material are compared to obtain a brightness attenuation value L, and then according to the preset time, the brightness attenuation rates Lx of different luminescent materials corresponding to different initial luminescent brightness are obtained. Wherein the luminance decay rate Lx represents the luminance decay value L per unit time.
Step S20, the display time of each display block of the display panel 10 is obtained by the timing control module 40.
In the embodiment of the present application, in the process that the user normally uses the display panel 10 to perform the screen display, the timing control module 40 obtains the display time of each display area of the display panel 10. Specifically, the counting module of the timing control module 40 counts the display time of each display block of the display panel 10 to obtain the display time corresponding to each block.
Step S30, obtaining, by the control module 50, a luminance attenuation difference according to the luminance attenuation rate Lx and the display time of each display block.
Referring to fig. 10 together, fig. 10 is a flowchart illustrating a step S30 of the compensation method shown in fig. 8.
In step S31, a plurality of brightness attenuation values corresponding to different display blocks are obtained by the control module 50 according to the received display times.
In step S32, a preset attenuation value is obtained by the control module 50 according to a plurality of brightness attenuation values of the display block corresponding to the display dynamic picture.
In the embodiment of the present application, the preset attenuation value may be an average value of a plurality of brightness attenuation values of a display block corresponding to the display dynamic picture, which is not particularly limited in the present application.
In the embodiment of the present application, the preset attenuation value is obtained only according to the brightness attenuation value of the display block displaying the dynamic picture, and the absolute value of the preset attenuation value obtained according to the absolute value of the brightness attenuation value of the display block displaying the dynamic picture is smaller because the absolute value of the brightness attenuation value is smaller. Further, the obtained preset attenuation value is higher, the efficiency of obtaining the preset attenuation value is improved, meanwhile, more display blocks with unbalanced brightness attenuation values are compensated, the uniformity of the brightness attenuation values of the display blocks of the display panel is higher, and the display effect is improved.
Step S33, comparing each brightness attenuation value with the preset attenuation value by the control module 50, and obtaining a plurality of brightness attenuation differences according to the comparison result.
In this embodiment of the present application, the brightness attenuation difference is a difference between the brightness attenuation value and the preset attenuation value.
When the absolute value of the brightness attenuation value is larger than the absolute value of the preset attenuation value, the brightness attenuation difference value is a negative value. When the absolute value of the brightness attenuation value is smaller than or equal to the absolute value of the preset attenuation value, the brightness attenuation difference value is a non-negative value.
Step S40, obtaining the compensation data according to the brightness attenuation difference value, and performing display compensation on a part of the display area of the display panel 10 according to the brightness attenuation difference value and the compensation data.
In this embodiment, when the luminance attenuation difference is a negative value, the control module 50 transmits the luminance attenuation difference to the data compensation module 60 and the timing control module 40, where the luminance attenuation difference is used for performing display compensation on the display block corresponding to the luminance attenuation difference.
In this embodiment of the present application, when the luminance decay difference is a non-negative value, it indicates that the luminance decay rate of the display area corresponding to the luminance decay difference is low, and display compensation is not required.
In this embodiment of the present application, compensation may refer to performing low-gray display on the display area with the negative brightness attenuation difference value, which may also be referred to as off-screen display. So that the brightness attenuation value of the display block is consistent with the brightness attenuation values of other areas. Further, the decaying brightness values of each display area of the display panel 10 are balanced, and the aging speeds of different luminescent materials are balanced, so as to improve the technical effect of the display panel 10 for displaying images.
It is understood that low gray scale display or off screen display refers to causing the display panel to illuminate in the event that it is not easily visible to the naked eye of a user.
In the embodiment of the application, the time for performing display compensation on the display panel can be confirmed by setting the specific time of the non-use period by the user.
Based on the same concept, the embodiments of the present application also provide a display device 1000, where the display device 1000 includes the display panel 10 and the driving compensation circuit described in any of the foregoing embodiments. The drive compensation circuit is used for performing display compensation on the display panel 10.
As shown in fig. 3, the display device 1000 may further include a power module 20 and a support frame 30, wherein the display panel 10 is fixed to the support frame 30, and the power module 20 is disposed at a rear surface of the display panel 10. The display panel 10 is used for displaying images, the power module 20 is electrically connected with the display panel 10 and is used for providing power supply voltage for displaying images of the display panel 10 rows, and the support frame 30 provides support and protection for the display panel 10 and the power module 20.
It can be understood that the display device provided in the embodiment of the present application may be any product or component having a display function, such as a display screen of a notebook computer, a liquid crystal display, a liquid crystal television, a mobile phone, a tablet computer, and the like.
In one embodiment, the display device 1000 further includes other necessary components and components such as a power panel, a high-voltage board, a key control board, etc., and those skilled in the art can correspondingly supplement the components according to the specific type and actual function of the display device 1000, which will not be described herein.
It will be appreciated that the display apparatus 1000 may also be used in an electronic device such as a cell phone, tablet computer, wearable electronic device with wireless communication capability (e.g., smart watch) or the like that includes functionality such as a personal digital assistant (Personal Digital Assistant, PDA) and/or a music player. The electronic device may also be other electronic means, such as a Laptop computer (Laptop) or the like having a touch sensitive surface, e.g. a touch panel.
In summary, in the driving compensation circuit, the compensation method and the display device 1000 provided in the present application, the control module 50 and the data compensation module 60 are disposed in the driving compensation circuit 100, and the display time of each display block is obtained through the timing control module 40, so as to obtain the brightness attenuation value of each display block, and the brightness attenuation difference value of each display block. And further, the luminance attenuation difference value is utilized to perform display compensation on a part of display blocks so as to balance the problem of afterimage of the display picture caused by different aging speeds of the luminescent materials of different display blocks, thereby prolonging the service life of the display panel 10. The display effect and the display taste of the display device 1000 are effectively improved. Further, the display effect and the service life of the display device 1000 are also effectively improved. In addition, the problem of manufacturing cost increase caused by the fact that the display picture residual image is overcome by increasing the area of the sub-pixels in the prior art is also solved, so that the attenuation rate and the aging rate of the R, G, B luminous element are kept consistent as much as possible by confirming the attenuation rates of different luminous elements, the problem of the picture residual image caused by different attenuation rates and aging rates is avoided, and the manufacturing cost is lower.
The flow chart described in the present application is merely one embodiment, and many modifications may be made to this illustration or to the steps in the present application without departing from the spirit of the present application. For example, the steps may be performed in a differing order, or steps may be added, deleted or modified. Those skilled in the art will recognize that the embodiments described above can be practiced with all or a portion of the process described and with equivalents of the process described and claimed herein, and which are within the scope of the invention.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. All possible combinations of the technical features in the above embodiments are described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. The driving compensation circuit comprises a time sequence control module and a driving module which are electrically connected with a display panel, wherein the time sequence control module drives the driving module to control the display panel to display pictures;
the time sequence control module acquires display time of a plurality of display blocks of the display panel and transmits the display time to the control module; the control module is used for obtaining brightness attenuation values of each block corresponding to the display time according to the brightness attenuation rates and the display time; the control module is further configured to obtain a preset attenuation value according to a plurality of brightness attenuation values corresponding to a display block of the display panel displaying a dynamic picture, compare each brightness attenuation value with the preset attenuation value, and obtain a plurality of brightness attenuation difference values according to a comparison result, where the brightness attenuation difference values include information representing compensation time and compensation brightness, and transmit the brightness attenuation difference values to the timing control module and the data compensation module; the data compensation module obtains compensation data according to the brightness attenuation difference values and transmits the compensation data to the driving module;
When the display panel is in an unused state, the driving module performs display compensation on a part of display blocks of the display panel according to the compensation data.
2. The driving compensation circuit of claim 1, wherein the predetermined attenuation value is an average value of a plurality of the brightness attenuation values corresponding to a display block displaying a dynamic picture.
3. The drive compensation circuit of claim 1, wherein the brightness decay difference is a negative value when the absolute value of the brightness decay value is greater than the absolute value of the preset decay value, the control module transmitting the brightness decay difference to the data compensation module and the timing control module;
when the absolute value of the brightness attenuation value is smaller than or equal to the absolute value of the preset attenuation value, the brightness attenuation difference value is a non-negative value, and the display compensation is not required to be carried out on the display block of the display panel corresponding to the brightness attenuation difference value.
4. The driving compensation circuit of claim 1, wherein the driving module comprises a data driving module and a scanning driving module, the data driving module and the scanning driving module are electrically connected with the timing control module, the data compensation module and the display panel, and the timing control module drives the scanning driving module to scan the corresponding display block according to the brightness attenuation difference value; the time sequence control module controls the data driving module to transmit power supply signals to the corresponding display blocks according to the compensation data according to the brightness attenuation difference value, and further performs display compensation on the corresponding display blocks of the display panel.
5. The drive compensation circuit of claim 4, further comprising an external compensation module electrically connected to both the display panel and the data driving module, wherein the external compensation module stores a power supply voltage and a threshold voltage of a transistor for driving the light emitting element to emit light;
the external compensation module is used for acquiring anode voltage of a light-emitting element of the display panel and current flowing through the light-emitting element, calculating a correction value of image data according to the acquired current, the anode voltage, the power supply voltage and the threshold voltage, and transmitting the correction value to the data driving module, wherein the data driving module corrects part of sub-pixel units of the display panel according to the correction value.
6. The driving compensation circuit according to any one of claims 1 to 5, wherein the display compensation is to control a display area of the display panel to perform low gray scale display such that the brightness attenuation value of the display area is equal to the preset attenuation value.
7. A compensation method for a drive compensation circuit according to any one of claims 1-6, characterized in that the compensation method comprises:
Obtaining brightness attenuation rates of different luminescent materials corresponding to different initial brightness;
acquiring the display time of each display block of the display panel through a time sequence control module;
obtaining a brightness attenuation difference value according to the brightness attenuation rate and the display time of each display block through a control module;
and obtaining compensation data according to the brightness attenuation difference value, and carrying out display compensation on part of display blocks of the display panel according to the brightness attenuation difference value and the compensation data.
8. The compensation method of claim 7, wherein the obtaining luminance decay rates for different luminescent materials corresponding to different initial luminances comprises:
determining a plurality of different said luminescent materials;
controlling each luminescent material to emit light for preset time corresponding to different initial brightness;
and measuring the final brightness of each luminescent material after the preset time of luminescence, and obtaining the brightness attenuation rates of different luminescent materials corresponding to different initial brightness according to the initial brightness, the final brightness and the preset time.
9. The compensation method of claim 7, wherein the obtaining, by the control module, the luminance decay difference value according to the luminance decay rate and the display time of each display block comprises:
Acquiring a plurality of brightness attenuation values corresponding to different display blocks according to the received display times by the control module;
acquiring a preset attenuation value according to a plurality of brightness attenuation values corresponding to a display block of a display dynamic picture through the control module;
and comparing each brightness attenuation value with the preset attenuation value through the control module, and obtaining a plurality of brightness attenuation difference values according to a comparison result.
10. A display device comprising a display panel and a drive compensation circuit according to any one of claims 1 to 6 for display compensation of the display panel.
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