Voltage compensation system, method, display panel, display device and storage medium

Abstract

The present application relates to a voltage compensation system, method, display panel, display device and storage medium. The voltage compensation system includes: a voltage detection circuit for measuring the anode drive voltage of a pixel unit; a voltage compensation circuit connected to the voltage detection circuit, and the voltage compensation circuit is used to compensate the data voltage according to the jump amount when the absolute value of the jump amount of the anode drive voltage is greater than a first preset threshold, wherein the first preset threshold is greater than the fluctuation amplitude of the anode drive voltage caused by coupling when the data voltage changes. The use of this system can reduce the impact of the anode drive voltage fluctuation and improve the uniformity and stability of the display screen. In addition, it can avoid the compensation of the anode drive voltage caused by the coupling of the data voltage, so as to avoid frequent changes in the data voltage, thereby avoiding the aggravation of the crosstalk phenomenon caused by the compensation of the anode drive voltage.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a voltage compensation system, method, display panel, display device and storage medium. Background Art

[0002] With the development of display technology, organic light emitting diode (OLED) displays are increasingly being used in various portable electronic devices due to their advantages such as fast response speed, high luminous efficiency, high brightness and wide viewing angle.

[0003] The anode drive voltage ELVDD output by the power voltage signal line is transmitted to each row of pixel units to drive each row of pixel units to work. However, in application, ELVDD may fluctuate, causing the current flowing through the pixel unit to change, thereby causing the image of the display panel to fluctuate, affecting the uniformity and stability of the displayed image. Summary of the Invention

[0004] Based on this, it is necessary to provide a voltage compensation system, method, display panel, display device and storage medium that can improve the uniformity and stability of the display screen in order to address the above technical problems.

[0005] In a first aspect, the present application provides a voltage compensation system, the voltage compensation system comprising:

[0006] A voltage detection circuit, used to measure the anode drive voltage of the pixel unit;

[0007] A voltage compensation circuit is connected to the voltage detection circuit, and the voltage compensation circuit is used to compensate the data voltage according to the jump amount when the absolute value of the jump amount of the anode drive voltage is greater than a first preset threshold, wherein the first preset threshold is greater than the fluctuation amplitude of the anode drive voltage caused by coupling when the data voltage changes.

[0008] The voltage compensation system described above can measure the anode drive voltage of a pixel unit via a voltage detection circuit. Because the voltage detection circuit is connected to the voltage compensation circuit, when the anode drive voltage fluctuates significantly, potentially significantly affecting the displayed image (i.e., when the jump in the anode drive voltage is greater than a first preset threshold), the voltage compensation circuit can compensate for the data voltage of the pixel unit, thereby reducing the impact of the anode drive voltage fluctuation and improving the uniformity and stability of the displayed image. Furthermore, because the first preset threshold is greater than the amplitude of the anode drive voltage fluctuation caused by coupling when the data voltage changes, changes in the grayscale value of the displayed image will not trigger the voltage compensation circuit to compensate for the data voltage, thus avoiding compensation of the anode drive voltage due to coupling of the data voltage. This prevents frequent changes in the data voltage, thereby avoiding the aggravation of crosstalk caused by compensation for ELVDD.

[0009] In one embodiment, the first preset threshold is greater than the maximum fluctuation amplitude of the anode drive voltage caused by coupling, and the maximum fluctuation amplitude is the fluctuation amplitude of the anode drive voltage caused by coupling when the data voltage changes the most within the adjustable range.

[0010] In one embodiment, the voltage compensation circuit is also used to record the limit fluctuation amplitude. When the number of the recorded limit fluctuation amplitudes reaches a second preset threshold, the fluctuation limit is determined based on the latest recorded n limit fluctuation amplitudes, and the first preset threshold is updated based on the fluctuation limit, where n≥1.

[0011] In one embodiment, the voltage compensation circuit is further used to clear the recorded limit fluctuation amplitude and perform a calibration operation after the first preset threshold is updated according to the fluctuation limit. The calibration operation includes recording the limit fluctuation amplitude, and when the number of recorded limit fluctuation amplitudes reaches a second preset threshold, determining the fluctuation limit according to the latest recorded n limit fluctuation amplitudes, and updating the first preset threshold according to the fluctuation limit.

[0012] In one embodiment, the voltage compensation circuit is further configured to determine the compensation amount according to the jump amount, and compensate the data voltage according to the compensation amount, wherein the sum of the compensation amount and the jump amount is zero.

[0013] In one embodiment, the voltage compensation circuit is further configured to maintain a dormant state when the absolute value of the jump amount of the anode driving voltage is less than a first preset threshold.

[0014] In a second aspect, the present application provides a display panel comprising the voltage compensation system as described above.

[0015] The advantages of the above display panel over the prior art are the same as the advantages of the above voltage compensation system over the prior art, and will not be repeated here.

[0016] In a third aspect, the present application provides a display device comprising the display panel as described above.

[0017] The advantages of the above-mentioned display device over the prior art are the same as those of the above-mentioned display panel over the prior art, and are not further elaborated here.

[0018] In a fourth aspect, the present application provides a voltage compensation method, the method comprising:

[0019] Obtaining the anode driving voltage of the pixel unit;

[0020] When the absolute value of the jump amount of the anode driving voltage is greater than a first preset threshold, the data voltage is compensated according to the jump amount, wherein the first preset threshold is greater than the maximum fluctuation amplitude of the anode driving voltage fluctuation caused by coupling when the data voltage is maximally adjusted.

[0021] In one embodiment, the method further comprises:

[0022] Recording the limit fluctuation amplitude;

[0023] When the number of the recorded limit fluctuation amplitudes reaches a second preset threshold, determining the fluctuation limit value according to the latest recorded n limit fluctuation amplitudes, where n≥1;

[0024] The first preset threshold is updated according to the fluctuation limit.

[0025] In one embodiment, after updating the first preset threshold according to the fluctuation limit, the method further includes:

[0026] The recorded extreme fluctuation amplitudes are cleared and a calibration operation is performed, wherein the calibration operation includes: recording the extreme fluctuation amplitudes, and when the number of the recorded extreme fluctuation amplitudes reaches a second preset threshold, determining a fluctuation limit based on the latest recorded n extreme fluctuation amplitudes, and updating the first preset threshold based on the fluctuation limit.

[0027] In a fifth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the following steps:

[0028] Obtaining the anode driving voltage of the pixel unit;

[0029] When the absolute value of the jump amount of the anode driving voltage is greater than a first preset threshold, the data voltage is compensated according to the jump amount, wherein the first preset threshold is greater than the maximum fluctuation amplitude of the anode driving voltage fluctuation caused by coupling when the data voltage is maximally adjusted.

[0030] The above-described voltage compensation method and storage medium, by obtaining the anode drive voltage, allows the voltage compensation circuit to compensate the data voltage of the pixel unit when the jump amount of the anode drive voltage is greater than a first preset threshold value, thereby reducing the impact of anode drive voltage fluctuations and improving the uniformity and stability of the displayed image. In addition, because the first preset threshold value is greater than the fluctuation amplitude of the anode drive voltage caused by coupling when the data voltage changes, changes in the grayscale value of the displayed image will not trigger the voltage compensation circuit to compensate for the data voltage, avoiding the need to compensate the anode drive voltage due to coupling of the data voltage, thus avoiding frequent changes in the data voltage and thus avoiding the aggravation of crosstalk caused by compensating for ELVDD. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A diagram showing an application environment of a voltage compensation system in one embodiment;

[0032] Figure 2 is a signal timing diagram when the first preset threshold is not set in one embodiment;

[0033] Figure 3 A comparison diagram of when compensation is triggered by a data voltage jump and when compensation is not triggered in one embodiment;

[0034] Figure 4 1 is a flow chart of a voltage compensation method according to an embodiment;

[0035] Figure 5 FIG. 4 is a flow chart of a voltage compensation method in another embodiment. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0038] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. It should also be understood that the terms "include / comprising" or "having" specify the presence of the stated features, integers, steps, operations, components, parts or their combinations, but do not exclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts or their combinations.

[0039] The electronic or electrical devices and / or any other related devices or components according to the embodiments of the concepts of the present application described herein (for example, a display device including a display panel and a display panel driver, wherein the display panel driver also includes a drive controller, a gate driver, a gamma reference voltage generator, a data driver and an emission driver) can be implemented using any appropriate hardware, firmware (for example, an application specific integrated circuit), software, or a combination of software, firmware and hardware. For example, the various components of these devices can be formed on an integrated circuit (IC) chip or on separate IC chips. In addition, the various components of these devices can be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on a substrate. In addition, the various components of these devices can be processes or threads that run on one or more processors in one or more computing devices to execute computer program instructions and interact with other system components to perform the various functions described herein. The computer program instructions are stored in a memory that can be implemented in a computing device using standard storage devices such as random access memory (RAM). The computer program instructions can also be stored in other non-transitory computer-readable media such as CD-ROMs, flash drives, etc. Moreover, it should be appreciated by those skilled in the art that the functionality of various computing devices can be combined or integrated into a single computing device, or that the functionality of a particular computing device can be distributed across one or more other computing devices without departing from the spirit and scope of the exemplary embodiments of the concepts of the present application.

[0040] Although exemplary embodiments of a display module and a display device including a display module have been specifically described herein, many modifications and variations will be apparent to those skilled in the art. Therefore, it will be understood that a display module constructed according to the principles of the present application and a display device including a display module may be implemented otherwise than as specifically described herein. The present application is further defined in the claims and their equivalents.

[0041] As described in the background art, with the development of display technology, organic light emitting diode (OLED) displays are increasingly being used in various portable electronic devices due to their advantages such as fast response speed, high luminous efficiency, high brightness and wide viewing angle.

[0042] The display panel includes multiple pixel units arranged in a matrix, each equipped with a pixel driver circuit. The display panel also includes a power chip and multiple power voltage signal lines connected to the power chip. The power chip is used to provide an anode drive voltage (ELVDD), and the power voltage signal lines are used to transmit the anode drive voltage (ELVDD) to the pixel driver circuit within each pixel unit. However, in applications, ELVDD may fluctuate, causing changes in the current flowing through the pixel unit, which in turn causes fluctuations in the display panel's image quality, affecting the uniformity and stability of the displayed image.

[0043] In one embodiment, Figure 1 As shown, a voltage compensation system 1 is provided, which includes a voltage detection circuit 11 and a voltage compensation circuit 12. The voltage detection circuit 11 is used to measure the anode drive voltage of the pixel unit; the voltage compensation circuit 12 is connected to the voltage detection circuit 11, and the voltage compensation circuit 12 is used to compensate the data voltage according to the jump amount when the absolute value of the jump amount of the anode drive voltage is greater than a first preset threshold, wherein the first preset threshold is greater than the fluctuation amplitude of the anode drive voltage caused by coupling when the data voltage changes.

[0044] The method can be used to determine the compensation amount based on the jump amount, and compensate the data voltage based on the compensation amount. The sum of the compensation amount and the jump amount can be zero. For example, if the jump amount is -A, the compensation amount is +A, where the symbol + represents a voltage rise, and the symbol - represents a voltage drop.

[0045] It can be understood that the voltage detection circuit 11 can be connected to the power supply voltage signal line to measure the anode driving voltage of the output value pixel driving circuit 21. The voltage detection circuit 11 measures the anode driving voltage and feeds it back to the voltage compensation circuit 12 in real time. When the voltage compensation circuit 12 detects the fluctuation of the anode driving voltage, it obtains the jump value of the fluctuation process of the voltage compensation circuit 12. When the absolute value of the jump value is greater than the first preset threshold value, the voltage compensation circuit 12 enters the working state from the sleep state, and then determines the compensation amount for ELVDD according to the jump value, and compensates the data voltage according to the compensation amount to reduce the impact of the anode driving voltage fluctuation on the display panel.

[0046] Optionally, the first preset threshold is greater than a limit fluctuation amplitude of the anode driving voltage caused by coupling, and the limit fluctuation amplitude is a fluctuation amplitude of the anode driving voltage caused by coupling when the data voltage undergoes a maximum change within an adjustable range.

[0047] In applications, the display screen may switch between black and white, that is, the grayscale value of the display screen may switch from 0 to 255, or from 255 to 0. When the display screen needs to switch between black and white, the data voltage will change the most within the adjustable range. At this time, the coupling of the data voltage will cause the anode drive voltage ELVDD to fluctuate greatly. If the first preset threshold is not set, such as Figure 2 As shown, Sck1 and Sck2 are scan signals, and ELVDD fluctuation will cause the voltage compensation circuit 12 to compensate for ELVDD, thereby causing the data voltage (corresponding to Figure 2 The source signal in the display panel also changes, and the compensation of ELVDD will have a certain delay, which will delay the action time of the data voltage. The action time of ELVDD and data voltage will be inconsistent, resulting in unstable data voltage and aggravating the crosstalk phenomenon of the display panel. For example, in the cross talk screen, the data voltage will couple ELVDD and raise 30mV (such as Figure 3 If ELVDD compensation is triggered, the data voltage at the charging position will be pulled up (e.g. Figure 3 Source1 in ), which makes the Cross Talk phenomenon worse.

[0048] When the first preset threshold is set and is greater than the maximum fluctuation amplitude of the anode driving voltage caused by coupling, the change in the data voltage will not trigger the compensation function of the voltage compensation circuit 12. For example, Figure 3 As shown in FIG, if the limit voltage for triggering ELVDD compensation is set to 100 mV (greater than the limit fluctuation amplitude), that is, the first preset threshold is 100, then even if ELVDD is coupled, the fluctuation of ELVDD will not exceed the limit voltage and will not trigger ELVDD compensation. The fluctuation of the data voltage is only due to the coupling effect of ELVDD (such as Figure 3 In Source2), since the fluctuation amplitude is small and the fluctuation position is not at the location where the data voltage is charged, the Cross Talk phenomenon caused by ELVDD compensation is prevented.

[0049] The voltage compensation system described above can measure the anode drive voltage of the pixel unit through the voltage detection circuit 11. Since the voltage detection circuit 11 is connected to the voltage compensation circuit 12, when the anode drive voltage fluctuates so much that it may seriously affect the display image, that is, when the jump amount of the anode drive voltage is greater than a first preset threshold, the voltage compensation circuit 12 can compensate the data voltage of the pixel unit, thereby reducing the impact of the anode drive voltage fluctuation and improving the uniformity and stability of the display image. In addition, because the first preset threshold is greater than the maximum fluctuation amplitude of the anode drive voltage when the data voltage is adjusted to the maximum, changes in the grayscale value of the display image will not trigger the voltage compensation circuit 12 to compensate for the data voltage, thereby avoiding the coupling of the data voltage to compensate for the anode drive voltage, thus avoiding frequent changes in the data voltage, and thus avoiding the aggravation of crosstalk caused by compensating for ELVDD.

[0050] In one embodiment, the voltage compensation circuit 12 is also used to record the limit fluctuation amplitude. When the number of the recorded limit fluctuation amplitudes reaches a second preset threshold, the fluctuation limit is determined based on the latest recorded n limit fluctuation amplitudes, and the first preset threshold is updated based on the fluctuation limit, n≥1.

[0051] In applications, the ELVDD fluctuation amplitude when the display switches between black and white can be obtained, and a limit fluctuation amplitude can be determined based on multiple acquired ELVDD fluctuation amplitudes. For example, the limit fluctuation amplitude can be obtained by averaging the multiple acquired ELVDD fluctuation amplitudes after noise reduction. Another example is that the maximum remaining fluctuation amplitude after noise reduction can be determined as the limit fluctuation amplitude. It is understood that in order to ensure that the first preset threshold is always greater than the limit fluctuation amplitude, a large margin should exist between the first preset threshold and the limit fluctuation amplitude to accommodate all similar products.

[0052] Among them, the fluctuation limit can be the maximum value of the n said extreme fluctuation amplitudes in the latest record. The upper limit value of the extreme fluctuation amplitude can be determined based on the fluctuation limit, and then a new first preset threshold can be determined based on the fluctuation limit. The first preset threshold is updated according to the actual product usage to reduce the margin between the first preset threshold and the extreme fluctuation amplitude. For example, the first preset threshold can be determined as the fluctuation limit plus 5mv.

[0053] In this embodiment, by recording the extreme fluctuation amplitudes, when the number of the recorded extreme fluctuation amplitudes reaches a second preset threshold, the fluctuation limit can be determined based on the latest recorded n extreme fluctuation amplitudes, and the first preset threshold is updated based on the fluctuation limit, thereby updating the first preset threshold according to the actual usage of the product. The first preset thresholds of different products of the same type may be different, thereby achieving self-adjustment and avoiding the triggering conditions of the voltage compensation circuit 12 being too high, resulting in some scenarios that should be compensated not realizing the compensation function of the voltage compensation circuit 12.

[0054] In one embodiment, the voltage compensation circuit 12 is also used to clear the recorded limit fluctuation amplitude and perform a calibration operation after the first preset threshold is updated according to the fluctuation limit. The calibration operation includes recording the limit fluctuation amplitude, and when the number of recorded limit fluctuation amplitudes reaches a second preset threshold, determining the fluctuation limit according to the latest recorded n limit fluctuation amplitudes, and updating the first preset threshold according to the fluctuation limit.

[0055] It is understood that as the display product ages, the range of the maximum fluctuation amplitude may change, and the original first preset threshold may no longer be appropriate. Therefore, after updating the first preset threshold, the recorded maximum fluctuation amplitude is cleared to eliminate the impact of old data and free up storage space. Calibration can then update the first preset threshold based on newly recorded data, making it more appropriate for current conditions.

[0056] In one embodiment, the present application provides a display panel including the voltage compensation system 1 described above.

[0057] The display panel may further include pixel units and a pixel driving circuit, wherein the pixel driving circuit is used to drive the pixel units to emit light. It is understood that the pixel units and the pixel driving circuit are well known to those skilled in the art and are not the focus of this application, so their specific structures and principles are not described in detail here.

[0058] The advantages of the above display panel over the prior art are the same as the advantages of the above voltage compensation system over the prior art, and will not be repeated here.

[0059] In one embodiment, the present application provides a display device including the display panel described above.

[0060] It is understandable that the display device in the embodiments of the present application can be an OLED display device, a QLED display device, an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, a wearable device, an Internet of Things device, or any other product or component with a display function, and the embodiments disclosed in the present application are not limited to this.

[0061] The advantages of the above-mentioned display device over the prior art are the same as those of the above-mentioned display panel over the prior art, and are not described in detail here.

[0062] Based on the same inventive concept, in one embodiment, Figure 4 As shown, the present application provides a voltage compensation method, the method comprising:

[0063] S401: Obtaining an anode driving voltage of a pixel unit;

[0064] S402: When the absolute value of the jump amount of the anode drive voltage is greater than a first preset threshold, compensating the data voltage according to the jump amount, wherein the first preset threshold is greater than the fluctuation amplitude of the anode drive voltage caused by coupling when the data voltage changes.

[0065] The method can be used to determine the compensation amount based on the jump amount, and compensate the data voltage based on the compensation amount. The sum of the compensation amount and the jump amount can be zero. For example, if the jump amount is -A, the compensation amount is +A, where the symbol + represents a voltage rise, and the symbol - represents a voltage drop.

[0066] Optionally, the first preset threshold is greater than a limit fluctuation amplitude of the anode drive voltage caused by coupling, and the limit fluctuation amplitude is a fluctuation amplitude of the anode drive voltage caused by coupling when the data voltage undergoes a maximum change within an adjustable range.

[0067] In applications, the display screen may switch between black and white, that is, the grayscale value of the display screen may switch from 0 to 255, or from 255 to 0. When the display screen needs to switch between black and white, the data voltage will change the most within the adjustable range. At this time, the coupling of the data voltage will cause the anode drive voltage ELVDD to fluctuate greatly. If the first preset threshold is not set, such as Figure 2 As shown, Sck1 and Sck2 are scan signals, and ELVDD fluctuation will cause the voltage compensation circuit to compensate for ELVDD, which will lead to the data voltage (corresponding to Figure 2 The source signal in the display panel also changes, and the compensation of ELVDD will have a certain delay, which will delay the action time of the data voltage. The action time of ELVDD and data voltage will be inconsistent, resulting in unstable data voltage and aggravating the crosstalk phenomenon of the display panel. For example, in the cross talk screen, the data voltage will couple ELVDD and raise 30mV (such as Figure 3 If ELVDD compensation is triggered, the data voltage at the charging position will be pulled up (e.g. Figure 3 Source1 in ), which makes the Cross Talk phenomenon worse.

[0068] When the first preset threshold is set and is greater than the maximum fluctuation amplitude of the anode drive voltage caused by coupling, the change in the data voltage will not trigger the compensation function of the voltage compensation circuit. Figure 3 As shown in FIG, if the limit voltage for triggering ELVDD compensation is set to 100 mV (greater than the limit fluctuation amplitude), that is, the first preset threshold is 100, then even if ELVDD is coupled, the fluctuation of ELVDD will not exceed the limit voltage and will not trigger ELVDD compensation. The fluctuation of the data voltage is only due to the coupling effect of ELVDD (such as Figure 3 In Source2), since the fluctuation amplitude is small and the fluctuation position is not at the location where the data voltage is charged, the Cross Talk phenomenon caused by ELVDD compensation is prevented.

[0069] The above-described voltage compensation method obtains the anode drive voltage so that when the jump amount of the anode drive voltage is greater than a first preset threshold, the voltage compensation circuit can compensate the data voltage of the pixel unit, thereby reducing the impact of anode drive voltage fluctuations and improving the uniformity and stability of the displayed image. In addition, because the first preset threshold is greater than the fluctuation amplitude of the anode drive voltage caused by coupling when the data voltage changes, changes in the grayscale value of the displayed image will not trigger the voltage compensation circuit to compensate for the data voltage, thus avoiding the need to compensate the anode drive voltage due to coupling of the data voltage, thus avoiding frequent changes in the data voltage and thus avoiding the aggravation of crosstalk caused by compensation for ELVDD.

[0070] In one embodiment, the voltage compensation method further includes: recording the limit fluctuation amplitude; when the number of the recorded limit fluctuation amplitudes reaches a second preset threshold, determining the fluctuation limit based on the latest recorded n limit fluctuation amplitudes, n≥1; and updating the first preset threshold based on the fluctuation limit.

[0071] In applications, the ELVDD fluctuation amplitude when the display switches between black and white can be obtained, and a limit fluctuation amplitude can be determined based on multiple acquired ELVDD fluctuation amplitudes. For example, the limit fluctuation amplitude can be obtained by averaging the multiple acquired ELVDD fluctuation amplitudes after noise reduction. Another example is that the maximum remaining fluctuation amplitude after noise reduction can be determined as the limit fluctuation amplitude. It is understood that in order to ensure that the first preset threshold is always greater than the limit fluctuation amplitude, a large margin should exist between the first preset threshold and the limit fluctuation amplitude to accommodate all similar products.

[0072] Among them, the fluctuation limit can be the maximum value of the n said extreme fluctuation amplitudes in the latest record. The upper limit value of the extreme fluctuation amplitude can be determined based on the fluctuation limit, and then a new first preset threshold can be determined based on the fluctuation limit. The first preset threshold is updated according to the actual product usage to reduce the margin between the first preset threshold and the extreme fluctuation amplitude. For example, the first preset threshold can be determined as the fluctuation limit plus 5mv.

[0073] In this embodiment, by recording the extreme fluctuation amplitude, when the number of the recorded extreme fluctuation amplitudes reaches a second preset threshold, the fluctuation limit can be determined based on the latest recorded n extreme fluctuation amplitudes, and the first preset threshold is updated based on the fluctuation limit, thereby updating the first preset threshold according to the actual usage of the product. The first preset thresholds of different products of the same type may be different, thereby achieving self-adjustment and avoiding the triggering conditions of the voltage compensation circuit being too high, resulting in the compensation function of the voltage compensation circuit not being able to be performed in some scenarios that should be compensated.

[0074] In one embodiment, after updating the first preset threshold according to the fluctuation limit, the method further includes: clearing the recorded extreme fluctuation amplitudes and performing a calibration operation, wherein the calibration operation includes: recording the extreme fluctuation amplitudes, and when the number of recorded extreme fluctuation amplitudes reaches a second preset threshold, determining the fluctuation limit according to the latest recorded n extreme fluctuation amplitudes, and updating the first preset threshold according to the fluctuation limit, n≥1.

[0075] It is understood that as the display product ages, the range of the maximum fluctuation amplitude may change, and the original first preset threshold may no longer be appropriate. Therefore, after updating the first preset threshold, the recorded maximum fluctuation amplitude is cleared to eliminate the impact of old data and free up storage space. Calibration can then update the first preset threshold based on newly recorded data, making it more appropriate for current conditions.

[0076] In one embodiment, based on the above embodiments, Figure 5 As shown, a voltage compensation method is provided, the voltage compensation method comprising:

[0077] S501: Obtaining an anode driving voltage of a pixel unit;

[0078] S502: When the absolute value of the jump amount of the anode driving voltage is greater than a first preset threshold, compensating the data voltage according to the jump amount, wherein the first preset threshold is greater than a maximum fluctuation amplitude of the anode driving voltage caused by coupling, and the maximum fluctuation amplitude is the fluctuation amplitude of the anode driving voltage caused by coupling when the data voltage undergoes a maximum change within an adjustable range;

[0079] S503: Executing a calibration operation, wherein the calibration operation includes: recording the limit fluctuation amplitudes, and when the number of the recorded limit fluctuation amplitudes reaches a second preset threshold, determining a fluctuation limit value based on the latest recorded n limit fluctuation amplitudes, and updating the first preset threshold value based on the fluctuation limit value;

[0080] S504: Clear the recorded limit fluctuation amplitude and return to perform the calibration operation.

[0081] The voltage compensation method described in this embodiment obtains the anode drive voltage so that when the jump amount of the anode drive voltage is greater than a first preset threshold, the data voltage of the pixel unit can be compensated by the voltage compensation circuit, reducing the impact of the anode drive voltage fluctuation and improving the uniformity and stability of the display. In addition, because the first preset threshold is greater than the fluctuation amplitude of the anode drive voltage caused by coupling when the data voltage changes, changes in the grayscale value of the displayed image will not trigger the voltage compensation circuit to compensate for the data voltage, avoiding the need to compensate the anode drive voltage due to coupling of the data voltage, thus avoiding frequent changes in the data voltage and thus avoiding the aggravation of crosstalk caused by compensation for ELVDD. At the same time, by continuously performing calibration operations, the first preset threshold can be continuously updated based on newly recorded data, so that the first preset threshold conforms to the current situation.

[0082] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0083] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0084] Obtaining the anode driving voltage of the pixel unit;

[0085] When the absolute value of the jump amount of the anode driving voltage is greater than a first preset threshold, the data voltage is compensated according to the jump amount, wherein the first preset threshold is greater than the maximum fluctuation amplitude of the anode driving voltage fluctuation caused by coupling when the data voltage is maximally adjusted.

[0086] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0087] Record the extreme fluctuation amplitudes; when the number of the recorded extreme fluctuation amplitudes reaches a second preset threshold, determine a fluctuation limit based on the latest recorded n extreme fluctuation amplitudes, where n≥1; and update the first preset threshold based on the fluctuation limit.

[0088] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0089] The recorded extreme fluctuation amplitudes are cleared and a calibration operation is performed, wherein the calibration operation includes: recording the extreme fluctuation amplitudes, and when the number of the recorded extreme fluctuation amplitudes reaches a second preset threshold, determining the fluctuation limit based on the latest recorded n extreme fluctuation amplitudes, and updating the first preset threshold based on the fluctuation limit, where n≥1.

[0090] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0091] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A voltage compensation system, characterized in that: The voltage compensation system comprises: A voltage detection circuit, used to measure the anode drive voltage of the pixel unit; A voltage compensation circuit is connected to the voltage detection circuit, and the voltage compensation circuit is used to compensate the data voltage according to the jump amount when the absolute value of the jump amount of the anode drive voltage is greater than a first preset threshold value, wherein the first preset threshold value is greater than the maximum fluctuation amplitude of the anode drive voltage fluctuation caused by coupling when the data voltage changes; the maximum fluctuation amplitude is the fluctuation amplitude of the anode drive voltage fluctuation caused by coupling when the data voltage undergoes the maximum change within the adjustable range.

2. The voltage compensation system according to claim 1, characterized in that: The voltage compensation circuit is also used to record the limit fluctuation amplitude. When the number of the recorded limit fluctuation amplitudes reaches a second preset threshold, the fluctuation limit is determined based on the latest recorded n limit fluctuation amplitudes, and the first preset threshold is updated based on the fluctuation limit, where n≥1.

3. The voltage compensation system according to claim 2, characterized in that: The voltage compensation circuit is also used to clear the recorded limit fluctuation amplitude after the first preset threshold is updated according to the fluctuation limit, and perform a calibration operation. The calibration operation includes recording the limit fluctuation amplitude, and when the number of recorded limit fluctuation amplitudes reaches a second preset threshold, determining the fluctuation limit according to the latest recorded n limit fluctuation amplitudes, and updating the first preset threshold according to the fluctuation limit.

4. The voltage compensation system according to claim 1, characterized in that: The voltage compensation circuit is further configured to determine a compensation amount according to the jump amount, and compensate the data voltage according to the compensation amount, wherein the sum of the compensation amount and the jump amount is zero.

5. The voltage compensation system according to claim 1, characterized in that: The voltage compensation circuit is further configured to maintain a dormant state when the absolute value of the jump amount of the anode driving voltage is smaller than a first preset threshold.

6. The voltage compensation system according to claim 1, characterized in that: The voltage compensation circuit is further used to obtain the fluctuation amplitude of the anode drive voltage when the display screen switches between black and white, and determine the limit fluctuation amplitude based on the fluctuation amplitudes of the anode drive voltage obtained multiple times.

7. A display panel, characterized in that: The method comprises the voltage compensation system according to any one of claims 1 to 6.

8. A display device, characterized in that: Comprising the display panel as claimed in claim 7.

9. A voltage compensation method, characterized in that: The method comprises: Obtaining the anode driving voltage of the pixel unit; When the absolute value of the jump amount of the anode drive voltage is greater than a first preset threshold value, the data voltage is compensated according to the jump amount, wherein the first preset threshold value is greater than the maximum fluctuation amplitude of the anode drive voltage fluctuation caused by coupling when the data voltage changes; the maximum fluctuation amplitude is the fluctuation amplitude of the anode drive voltage fluctuation caused by coupling when the data voltage undergoes the maximum change within the adjustable range.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 9 are implemented.

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