Constant current control method, device and equipment

Abstract

The invention relates to a constant current control method, device and equipment. The constant current control method comprises the following steps: acquiring picture brightness data; determining a picture display mode according to the picture brightness data; under the condition that the picture display mode is a target display mode, determining a first brightness data sum of the current frame according to the picture brightness data; under the condition that the sum of the first brightness data exceeds a preset protection data threshold value, performing power protection processing according to preset current lifting information corresponding to the target display mode in combination with first power supply rated power and the sum of the first brightness data to obtain a refresh current of the current frame; and outputting a constant current driving signal corresponding to the picture brightness data according to the refresh current, thereby preventing the power of the power supply from exceeding the rated power, ensuring the stable work of the power supply, and solving the problem of unstable work caused by sudden change of the power of the whole machine in the prior art.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a constant current control method, device and equipment. Background Art

[0002] With the continuous advancement of display technology, ordinary light-emitting diode (LED) TVs can no longer meet higher picture quality requirements, and the emergence of Mini-LED technology has directly entered an era of competition with organic light-emitting diode (OLED) effects. Mini-LED can be simply understood as a miniaturized LED. By using thousands of Mini-LEDs as backlight sources and combining them with local dimming (LD) technology, each LED can be controlled individually. If the LED is small enough and the number is large enough, one LED can be used as a backlight source for one pixel, achieving infinite contrast and making a qualitative leap in picture quality. Mini-LED combined with active matrix drive (AM) has become an industry trend.

[0003] At present, the AM Mini-LED TV field generally adopts the "light board + control board" architecture, such as Figure 1 As shown, the system-on-chip (SOC) extracts the screen LD data through the brightness information of the current screen, and then sends it to the microcontroller unit (MCU) on the constant current board through the serial peripheral interface (SPI); when the constant current board uses multiple MCUs, the SOC needs multiple SPI interfaces to establish a communication connection with the MCU. The MCU on the constant current board processes the received SPI data and sends it to the backlight driver IC for partition light control. For backlight drivers with more than a thousand partitions and controlled by multiple MCUs, as the number of partitions increases, the current changes slightly, which brings great changes to the power of the whole machine, and it is easy to have unstable operation caused by sudden changes in the power of the whole machine. Summary of the invention

[0004] The present application provides a constant current control method, device and equipment to solve the problem of unstable operation caused by sudden change of the whole machine power in the existing related technology.

[0005] In a first aspect, the present application provides a constant current control method, comprising:

[0006] Get the screen brightness data;

[0007] Determine a picture display mode according to the picture brightness data;

[0008] When the picture display mode is the target display mode, determining the sum of first brightness data of the current frame according to the picture brightness data;

[0009] When the sum of the first brightness data exceeds a preset protection data threshold, power protection processing is performed according to preset current boost information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, to obtain a refresh current of the current frame;

[0010] According to the refresh current, a constant current driving signal corresponding to the picture brightness data is output.

[0011] Optionally, when the picture display mode is the target display mode, determining the sum of first brightness data of the current frame according to the picture brightness data includes:

[0012] When the picture display mode is the target display mode, extracting brightness data of the current frame from the picture brightness data;

[0013] The brightness data of the current frame is accumulated to obtain the first brightness data sum of the current frame.

[0014] Optionally, after determining the sum of first brightness data of the current frame according to the picture brightness data, the method further includes:

[0015] determining a rated power of the first power supply;

[0016] Determining whether the first brightness data sum exceeds the protection data threshold;

[0017] Determining the protection data threshold based on the rated power of the first power supply;

[0018] Determining whether the first brightness data sum exceeds the protection data threshold;

[0019] If the sum of the first brightness data does not exceed the protection data threshold, the refresh is directly performed according to the current boost information to obtain the refresh current of the current frame.

[0020] Optionally, before determining whether the first brightness data sum exceeds the protection data threshold, the constant current control method provided in the present application further includes:

[0021] Determine the constant current control method;

[0022] In the case where the constant current control mode belongs to the preset control mode, the first brightness data sum is added to the received brightness data sum corresponding to the current frame to obtain the second brightness data sum of the current frame, where the second brightness data sum is the brightness data sum of the entire scene of the current frame;

[0023] In a case where the second brightness data sum exceeds a preset scene data threshold corresponding to the rated power of the second power supply, a step of determining whether the first brightness data sum exceeds the protection data threshold is performed.

[0024] Optionally, after determining the constant current control mode, the constant current control method provided in the present application further includes: judging whether the constant current control mode belongs to a preset control mode; if the constant current control mode does not belong to the preset control mode, executing the step of judging whether the sum of the first brightness data exceeds the protection data threshold.

[0025] Optionally, after accumulating the first brightness data sum and the received brightness data sum corresponding to the current frame to obtain the second brightness data sum of the current frame, the method further includes:

[0026] Obtaining a preset scene data threshold corresponding to the rated power of the second power supply;

[0027] Determining whether the second brightness data sum exceeds the scene data threshold;

[0028] If the sum of the second brightness data does not exceed the scene data threshold, the refresh is performed directly according to the current boost information to obtain the refresh current of the current frame.

[0029] Optionally, performing power protection processing according to preset current boost information corresponding to the target display mode and combining the rated power of the first power supply and the sum of the first brightness data to obtain a refresh current of the current frame includes:

[0030] Performing a ratio calculation based on the sum of the first brightness data and the rated power of the first power supply to obtain ratio information;

[0031] Adjusting the current boost information based on the ratio information to obtain current adjustment information;

[0032] Refresh is performed according to the current adjustment information to obtain the refresh current of the current frame.

[0033] Optionally, the ratio calculation based on the total of the first brightness data and the first power supply rated power to obtain the ratio information includes: dividing the first power supply rated power by the total of the first brightness data to obtain an adjustment ratio; and determining the adjustment ratio as the ratio information.

[0034] Optionally, adjusting the current boost information based on the ratio information to obtain the current adjustment information includes: using the current boost information to determine the current amplitude; multiplying the current amplitude by the adjustment ratio to obtain the current adjustment amplitude; and determining the current adjustment amplitude as the current adjustment information.

[0035] In a second aspect, the present application provides a constant current control device, comprising:

[0036] A brightness data acquisition module is used to acquire picture brightness data;

[0037] A mode determination module, used for determining a picture display mode according to the picture brightness data;

[0038] A first brightness data sum determination module, configured to determine the first brightness data sum of the current frame according to the picture brightness data when the picture display mode is the target display mode;

[0039] A power protection processing module, configured to perform power protection processing according to preset current boost information corresponding to the target display mode, in combination with the rated power of the first power supply and the sum of the first brightness data, to obtain a refresh current of the current frame when the sum of the first brightness data exceeds a preset protection data threshold;

[0040] The driving signal output module is used to output a constant current driving signal corresponding to the picture brightness data according to the refresh current.

[0041] In a third aspect, the present application provides an electronic device comprising: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; the memory is used to store computer programs; the processor is used to implement the steps of the constant current control method as described in any one of the first aspects of the present application when executing the program stored in the memory.

[0042] In a fourth aspect, the present application provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the steps of the constant current control method as described in any one of the first aspect of the present application.

[0043] The above-mentioned technical solution provided in the embodiment of the present application obtains the picture brightness data, and determines the picture display mode according to the picture brightness data, so that when the picture display mode is the target display mode, the sum of the first brightness data of the current frame is determined according to the picture brightness data, so that when the sum of the first brightness data exceeds the preset protection data threshold, according to the preset current increase information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, power protection processing is performed to obtain the refresh current of the current frame, and then according to the refresh current, the constant current drive signal corresponding to the picture brightness data is output, thereby preventing the problem of unstable operation of the whole machine power supply caused by the power storage of the whole machine exceeding the limit rated power of the power supply, thereby ensuring the stable operation of the whole machine power supply and the stability of the whole machine system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0046] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0047] Figure 1 A schematic diagram of an AM Mini-LED backlight system architecture provided for existing related technologies;

[0048] Figure 2 A schematic diagram of a constant current control method according to an embodiment of the present invention;

[0049] Figure 3 A schematic diagram of the steps of a constant current control method in a single MCU control scenario provided as an example of this application;

[0050] Figure 4 A schematic diagram of the steps of the constant current control method in the two MCU control scenario provided for this application example;

[0051] Figure 5 A structural block diagram of a constant current control device provided in an embodiment of the present application is shown;

[0052] Figure 6 A structural block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0055] In the existing related technologies, as the number of partitions increases, the constant current controller also develops from one to multiple constant current controllers working simultaneously for precise backlight control. At this time, the power of the whole machine also increases rapidly, and the stability of the whole machine faces great challenges. Among them, the constant current controller can be an MCU or FBGA, and the embodiments of this application do not make specific restrictions on this.

[0056] For example, due to the limited computing power of the MCU, the more partitions there are, the more time the MCU takes to receive SPI data, process SPI data, and send SPI data to the backlight driver IC; if the number of partitions on a single LED light board is more, the number of signals between the LED and the driver IC and the number of LEDs will increase; when the partitions reach the upper limit controlled by a single MCU, multiple MCUs are required for partition control.

[0057] As the number of partitions increases, the data processing time requirements increase. Even a single MCU cannot process data alone and needs multiple MCUs to work together. At this time, the MCUs need to jointly adjust the backlight to prevent local unevenness in the backlight. Therefore, it is urgent to invent a constant current MCU power protection algorithm. If the algorithm time and space complexity are too high, it is very easy to cause the MCU to process data errors due to running the power protection algorithm, causing backlight anomalies and system crashes. For example, in the state of high dynamic range images (HDR), since a very high peak brightness is required to obtain a higher extreme contrast, the power of the whole machine will suddenly change. This power will suddenly increase to the maximum rated power of the power supply, which is easy to cause the whole machine power supply to work unstable, and then cause the power supply to trigger protection, resulting in a sudden black screen and the backlight cannot be turned on.

[0058] Specifically, the data transmitted by SOC through SPI is the brightness data of the current picture. In order to improve the contrast and obtain a better viewing effect, in HDR mode, the data sent by SOC is very likely to exceed the protection point of the power supply, resulting in a black screen. It can be seen that the data sent by SOC is unstable, causing the system to be very unstable.

[0059] In addition, in order to ensure the refresh speed, the MCU on the constant current board generally does not change the received SPI data again, and actually receives and sends it. Specifically, since the current screen brightness data sent by the SOC itself has been processed, and due to the computing power limitations of the MCU itself, the secondary processing time for the data in the separate area is relatively long, affecting the data transmission speed. Therefore, the MCU in the prior art can only receive data and send it to the constant current driver IC. If the MCU performs secondary processing on the SPI data sent by the received SOC, it will cause data delays, and in severe cases, screen flickering will occur.

[0060] In order to solve the above-mentioned problems such as unstable operation of the whole machine power supply, black screen, flashing screen, etc. caused by power mutation, the present application provides a constant current control method, device and equipment, by obtaining picture brightness data, and determining the picture display mode according to the picture brightness data, so that when the picture display mode is the target display mode, the sum of the first brightness data of the current frame is determined according to the picture brightness data; when the sum of the first brightness data of the current frame exceeds the preset protection data threshold, according to the preset current increase information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, power protection processing is performed to obtain the refresh current of the current frame, so as to output the constant current drive signal corresponding to the picture brightness data according to the refresh current, thereby preventing the whole machine power from exceeding the maximum power that the power supply can bear, ensuring the stability of the whole system and the stability of the power supply operation.

[0061] Figure 2A schematic diagram of the steps of a constant current control method provided in an embodiment of the present application. In a specific implementation, the constant current control method provided in an embodiment of the present application can be applied to a display scenario of multi-partition control, such as a constant current controller in a multi-partition drive constant current control architecture, such as Figure 2 As shown, the constant current control method provided in the embodiment of the present application may specifically include the following steps:

[0062] Step 210, obtaining picture brightness data;

[0063] Wherein, obtaining the picture brightness data may refer to the brightness data of the displayed picture. For example, when the SOC sends SPI data to the constant current controller via the SPI communication interface, the brightness data of the currently displayed picture may be extracted from the SPI data as the picture brightness data.

[0064] Step 220, determining a picture display mode according to the picture brightness data;

[0065] Specifically, in order to ensure that the power supply power does not exceed the upper limit of the power supply, after the constant current controller obtains the screen brightness data, the embodiment of the present application can determine the screen display mode according to the screen brightness data, so as to determine whether to refresh the current frame current amplitude by counting the brightness data of the current frame when the screen display mode is the target display mode, thereby preventing the power supply protection phenomenon caused by the total current corresponding power exceeding the rated power of the power supply. Among them, the target display mode refers to a mode pre-set for power protection restrictions, such as the HDR display mode, the display mode adopted after the dynamic range expansion (boost) function is turned on, etc., and the embodiment of the present application does not limit this.

[0066] Step 230, when the picture display mode is the target display mode, determining the sum of first brightness data of the current frame according to the picture brightness data;

[0067] The sum of the first brightness data of the current frame refers to the sum of the brightness data received by the constant current controller that executes the constant current control method for the current frame. Specifically, after determining that the screen display mode is the target display mode, the embodiment of the present application can extract all the brightness data of the current frame from the acquired screen brightness data, and accumulate the brightness data of the current frame, so that the sum of the first brightness data of the current frame can be determined by accumulation, so that the size of the refresh current of the current frame can be determined based on the sum of the first brightness data, thereby effectively preventing the power of the whole machine from exceeding the maximum power that the power supply can carry.

[0068] Step 240, when the first brightness data sum exceeds the preset protection data threshold, power protection processing is performed according to the preset current boost information corresponding to the target display mode, combined with the rated power of the first power supply and the first brightness data sum, to obtain the refresh current of the current frame.

[0069] Among them, the first power supply rated power refers to the power supply rated power of the constant current controller; the preset protection data threshold refers to the protection point data pre-set for the first power supply rated power, such as brightness protection data set according to the first power supply rated power, so that when the sum of the first brightness data of the current frame exceeds the brightness protection data, power protection is performed through the constant current controller to prevent the power of the whole machine from exceeding the maximum power that the power supply can carry. .

[0070] Specifically, after determining the sum of the first brightness data of the current frame, the embodiment of the present application can determine whether the sum of the first brightness data exceeds the preset protection data threshold, so as to determine whether the current frame needs power protection by determining whether the sum of the first brightness data exceeds the preset protection data threshold.

[0071] Specifically, if the sum of the first brightness data does not exceed the preset protection data threshold, it can be considered that the current frame does not require the constant current controller to perform power protection, and the constant current controller can be refreshed directly so that a constant current drive signal can be output according to the refresh current subsequently, that is, step 250 is executed to achieve constant current drive display.

[0072] When it is determined that the sum of the first brightness data exceeds the preset protection data threshold, it can be considered that the current frame requires power protection by the constant current controller, and the constant current controller can be triggered to obtain the preset current increase information corresponding to the target display mode, so that the constant current controller can perform power protection processing based on the current increase information, combined with the rated power of the first power supply and the sum of the first brightness data. For example, the constant current controller can adjust the current amplitude value based on the current increase information, using the rated power of the first power supply and the sum of the first brightness data, so as to refresh according to the adjusted current amplitude value to obtain the refresh current of the current frame, thereby preventing the power of the entire machine from exceeding the maximum power that the power supply can bear, ensuring that the power of the entire machine in the current frame does not exceed the rated power, and achieving the purpose of power protection.

[0073] The preset current boost information corresponding to the target display mode refers to current information pre-set for the target display mode. For example, the current boost information may be a current amplitude pre-set for the target display mode.

[0074] Step 250: output a constant current driving signal corresponding to the picture brightness data according to the refresh current.

[0075] The constant current driving signal refers to a driving signal controlled by a constant current, such as a driving signal output by a constant current board to a backlight driving IC. Specifically, this step can be to drive the backplane driving IC with a constant current controller on the constant current board according to the refresh current to realize backlight display.

[0076] It can be seen that after obtaining the screen brightness data, the embodiment of the present application determines the screen display mode, and when the screen display mode is the target display mode, determines the sum of the first brightness data of the current frame according to the screen brightness data, and when the first brightness data sum exceeds the preset protection data threshold, according to the preset current increase information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, performs power protection processing to obtain the refresh current of the current frame, and outputs the constant current drive signal corresponding to the screen brightness data according to the refresh current of the current frame, thereby preventing the power storage of the whole machine from exceeding the maximum rated power of the power supply, ensuring the stable operation of the power supply of the whole machine, that is, solving the problem of unstable operation of the power supply of the whole machine caused by the power storage of the whole machine exceeding the maximum rated power of the power supply, thereby effectively improving the stability of the whole machine system.

[0077] In some optional embodiments of the present application, in order to ensure timely data processing and avoid data delays, screen flickering, etc. caused by secondary processing of SPI data sent by the received SOC by a constant current controller such as an MCU, the embodiment of the present application can determine the picture display mode according to the picture brightness data after obtaining the picture brightness data sent by the SOC to the constant current controller, so that when the picture display mode is the target display mode, the sum of the first brightness data of the current frame is determined according to the picture brightness data, and by judging whether the sum of the first brightness data of the current frame exceeds the protection point data pre-set for the rated power of the first power supply, it is determined whether the brightness data of the current frame exceeds the brightness data of the rated power of the first power supply, so that when it is judged that the sum of the first brightness data of the current frame exceeds the preset protection data threshold, power protection processing is performed according to the preset current boost information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, so as to ensure that the positive power of the current frame does not exceed the rated power of the first power supply, thereby achieving the purpose of power protection.

[0078] Optionally, in an embodiment of the present application, when the picture display mode is a target display mode, determining the sum of the first brightness data of the current frame based on the picture brightness data, which may specifically include: when the picture display mode is the target display mode, extracting the brightness data of the current frame from the picture brightness data; accumulating the brightness data of the current frame to obtain the sum of the first brightness data of the current frame.

[0079] For example, in a multi-partition AM Mini-LED scenario, in order to improve the contrast in the HDR state, the HDR display mode can be determined as the target display mode, and the sum of the first brightness data of the current frame can be determined based on the picture brightness data, so as to determine whether the brightness data of the current frame exceeds the protection point data pre-set for the rated power of the first power supply, so as to determine whether the brightness data of the current frame exceeds the rated power of the first power supply. Then, for the brightness data exceeding the rated power of the first power supply, power protection can be performed according to the preset current increase information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data of the current frame; and the brightness data that does not exceed the rated power of the first power supply can be directly refreshed, such as being refreshed according to the preset current increase information corresponding to the target display mode, so as to improve the stability of the entire system while ensuring that the brightness data sent by the receiving SOC remains unchanged, and at the same time improve the service life of the power supply, thereby promoting the popularization of AM Mini-LED.

[0080] Of course, the constant current control method proposed in the embodiment of the present application can not only be used in the AM Mini-LED display field, but also can be used in other multi-partition drive constant current control architectures, such as being suitable for all display fields that adopt multi-partition control, so that the constant current controller in other multi-partition drive constant current control architectures can achieve constant current dimming control through the constant current control method provided by this implementation, and then the total power of the source can be protected from exceeding the upper limit of the power supply during normal use, thereby improving the stability of the entire system.

[0081] In some optional embodiments of the present application, brightness protection data can be set in advance for the rated power of the first power supply as a preset protection data threshold, so that when the sum of the first brightness data of the current frame exceeds the brightness protection data, it can be considered that the sum of the first brightness data exceeds the preset protection data threshold, and then power protection processing can be performed based on the preset current increase information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, to prevent device damage or other problems caused by the power of the entire machine exceeding the rated power of the first power supply.

[0082] Optionally, the constant current control method provided in the embodiment of the present application may further include, after determining the sum of the first brightness data of the current frame based on the picture brightness data: determining the rated power of the first power supply; determining the protection data threshold based on the rated power of the first power supply; judging whether the sum of the first brightness data exceeds the protection data threshold, so as to compare the sum of the first brightness data of the current frame with the brightness protection data corresponding to the rated power of the first power supply; if the sum of the first brightness data does not exceed the protection data threshold, directly refreshing according to the current boost information to obtain the refresh current of the current frame.

[0083] Specifically, after determining the sum of the first brightness data of the current frame, the embodiment of the present application can compare the sum of the first brightness data of the current frame with the brightness protection data corresponding to the rated power of the first power supply, so as to determine whether the sum of the first brightness data of the current frame exceeds the brightness protection data to determine whether the whole machine power corresponding to the brightness data of the refreshed current frame exceeds the rated power of the first power supply, so that when the sum of the first brightness data of the current frame exceeds the brightness protection data, that is, when the sum of the first brightness data of the current frame exceeds the preset protection data threshold, it is considered that the whole machine power corresponding to the brightness data of the refreshed current frame exceeds the rated power of the first power supply, and then according to the preset current boost information corresponding to the target display mode, power protection processing is performed in combination with the rated power of the first power supply and the sum of the first brightness data to prevent the whole machine power from exceeding the rated power of the first power supply; and when the sum of the first brightness data of the current frame does not exceed the brightness protection data, that is, when the sum of the first brightness data of the current frame does not exceed the preset protection data threshold, it is considered that the whole machine power corresponding to the brightness data of the refreshed current frame does not exceed the rated power of the first power supply, and then it is directly refreshed according to the current boost information, so that a constant current drive signal can be output according to the refresh current to achieve drive display.

[0084] In some optional embodiments of the present application, based on the preset current boost information corresponding to the target display mode, power protection processing is performed in combination with the rated power of the first power supply and the sum of the first brightness data to obtain the refresh current of the current frame, which may specifically include: performing a ratio calculation based on the sum of the first brightness data and the rated power of the first power supply to obtain ratio information; adjusting the current boost information based on the ratio information to obtain current adjustment information; refreshing according to the current adjustment information to obtain the refresh current of the current frame.

[0085] For example, since displaying in an HDR scene requires higher brightness and higher contrast, the current amplitude Iset required to be increased in the HDR scene can be set to the preset current increase information corresponding to the target display mode, so that data can be refreshed later according to the current increase information. Specifically, when in an HDR scene, the MCU on the constant current board receives and accumulates the data sent by the SOC of the current frame to obtain the sum S of the first brightness data of the current frame, and the accumulated sum S of the first brightness data of the current frame can be compared with the set power rated power point Si to determine whether the sum S of the first brightness data of the current frame is greater than the power rated power point Si. If the sum S of the first brightness data of the current frame is less than the power rated power point Si, that is, the sum S of the first brightness data of the current frame is less than the preset data protection value corresponding to the first power rated power, the MCU can refresh the data of the current frame according to the HDR current amplitude Iset, that is, directly refresh according to the current increase information. If the total first brightness data S of the current frame is greater than the set power rating point Si of the power supply, that is, the total first brightness data S of the current frame is greater than the preset data protection value corresponding to the maximum power that the power supply can bear, at this time, the MCU can automatically calculate the ratio based on the current frame data, the total first brightness data S of the current frame and the first power rating of the power supply, so as to adjust the current amplitude value based on the calculated ratio information, and can use the current size after the current amplitude value is adjusted as the current adjustment information, so as to refresh according to the current size after the current amplitude value is adjusted based on the current adjustment information.

[0086] Optionally, an embodiment of the present application performs a ratio calculation based on the sum of the first brightness data and the first power supply rated power to obtain ratio information, which may specifically include: dividing the first power supply rated power by the sum of the first brightness data to obtain an adjustment ratio; determining the adjustment ratio as the ratio information, so that the current boost information can be subsequently adjusted based on the ratio information, thereby preventing the power supply power from exceeding the rated power while ensuring maximum brightness and contrast, thereby ensuring stable operation of the system.

[0087] In an optional embodiment of the present application, the current boost information is adjusted based on the ratio information to obtain the current adjustment information, which may specifically include: using the current boost information to determine the current amplitude; multiplying the current amplitude by the adjustment ratio to obtain the current adjustment amplitude; determining the current adjustment amplitude as the current adjustment information so that it can be refreshed subsequently according to the current adjustment information.

[0088] For example, when the sum S of the first brightness data of the current frame is greater than the set power rating point Si of the power supply, after the current amplitude Iset is determined by using the current boost information, the current amplitude Iset can be multiplied by the adjustment ratio Si / S according to the calculation formula I=Iset*Si / S. The current amplitude value can be adjusted by adjusting the ratio Si / S, thereby ensuring that the current frame power is controlled in all HDR scenarios, so as to achieve the purpose of ensuring that the power supply power does not exceed the rated power in all scenarios while ensuring maximum brightness and contrast.

[0089] As an example of the present application, in order to solve the stability problem of single or multiple constant current MCU AM Mini-LED products with multiple partitions, the display mode adopted after the boost function is turned on can be determined as the target display mode, so that power can be limited in the HDR scene under the target display mode. There is no need for SOC to perform power protection. The MCU on the constant current board can determine how to refresh the current amplitude of the current frame through the current frame data to prevent the total current from exceeding the rated power of the power supply and causing power protection.

[0090] Specifically, no matter it is a Mini-LED scene controlled by a single MCU or a Mini-LED scene controlled by multiple MCUs, power protection limitation is performed by the MCU in the HDR scene, and no SOC is required for power protection. That is, the MCU can determine how to refresh the current amplitude of the current frame based on the current frame data to prevent the total current from exceeding the rated power of the power supply and causing power protection.

[0091] Specifically, for the Mini-LED scene controlled by a single MCU, it can be determined whether the current frame command byte is in an HDR scene; if it is not an HDR scene, it can be determined that the current picture display mode is not the target display mode, and the data can be refreshed according to the initial current I0 set under the standard dynamic range image (Standard Dynamic Range, SDR); when in an HDR scene, it can be determined that the current picture display mode is the target display mode, and higher brightness is required to achieve a higher contrast, and the current amplitude needs to be increased to Iset.

[0092] For example, Figure 3As shown, after obtaining the picture brightness data DATA sent by the SOC to the MCU, it can be determined whether the current picture display mode is the HDR display mode; if the current picture display mode is not the HDR display mode, the initial current I0 set under the SDR can be determined as the refresh current I of the current frame, that is, I=I0, so as to output a constant current drive signal to the driver IC according to the refresh current I; and when the current picture display mode is the HDR scene, the brightness data sent by the SOC of the current frame received by the MCU can be accumulated, so as to obtain the first brightness data sum S of the current frame by accumulating the brightness data of the current frame. For example, when the brightness data of the current frame includes n brightness data such as DATA(1), DATA(2)...DATA(n), the data sum corresponding to the n brightness data from DATA(1) to DATA(n) can be determined as the first brightness data sum of the current frame by accumulation. and S, that is, S=DATA(1)+DATA(2)+...DATA(n), wherein DATA(1) is the first brightness data of the current frame received by the MCU, DATA(2) is the second brightness data of the current frame received by the MCU, DATA(n) is the nth brightness data of the current frame received by the MCU, and n is an integer greater than 1. The current total partition ZONESIZE can be multiplied by the maximum value OXFFF reached by the SOC data, and by the ratio of the initial current I0 set by the SDR to the HDR boost current to obtain the power rated power point Si, that is, Si=ZONESIZE*OXFFF*I0 / Iset. Subsequently, the power rated power point Si can be used as the brightness protection data corresponding to the first power rated power, so as to determine whether power protection is needed by judging whether the total sum S of the first brightness data of the current frame is greater than the power rated power point Si. If the sum of the first brightness data S of the current frame is not greater than the rated power point Si of the power supply, such as when the sum of the first brightness data S of the current frame is less than the rated power point Si of the power supply, the MCU can directly refresh according to the current boost information, such as setting the boost current amplitude Iset for HDR as the amplitude of the refresh current, so as to determine the HDR boost current as the refresh current I of the current frame, that is, I=Iset; if the sum of the first brightness data S of the current frame is greater than the rated power point Si of the power supply, that is, S>Si, the MCU can consider that the sum of the first brightness data S of the current frame is greater than the protection data threshold corresponding to the maximum power that the power supply can bear, and can use the calculation formula I=Iset*Si / S, and use the current amplitude Iset multiplied by the adjustment ratio Si / S to adjust the current amplitude value by adjusting the ratio Si / S to obtain the refresh current I of the current frame, so that the MCU can output a constant current drive signal to the driver IC according to the refresh current I to achieve display drive.

[0093] It can be seen that by applying the constant current control method provided in the embodiment of the present application, calculations can be performed for the data of each frame, and when it is calculated that the sum of the first brightness data of the current array exceeds the preset protection data threshold, power protection processing is performed based on the preset current increase information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, thereby realizing the control of the current frame power in all HDR scenarios, achieving the goal that the power supply power does not exceed the rated power in all scenarios while ensuring the maximum brightness and contrast, thereby ensuring the stable operation of the system.

[0094] For example, for ultra-high partitions or even 10,000-partition Mini-LED scenes controlled by two or more MCUs, before determining whether the sum of the first brightness data of the current frame exceeds the brightness protection data corresponding to the rated power of the first power supply, the MCU can also obtain the sum of the first brightness data received by other MCUs based on the communication interface between different MCUs, and then add it to the sum of the first brightness data of the current frame received by itself to obtain the sum of the second brightness data of the current frame, and then determine whether the sum of the second brightness data exceeds the preset scene data threshold corresponding to the rated power of the second power supply to determine whether it is necessary to perform power protection processing according to the preset current boost information corresponding to the target display mode, thereby preventing the phenomenon of different currents and brightness in different areas caused by the independent operation of the MCUs and different power protection methods triggered by different MCUs, thereby improving the picture display quality. Among them, the communication interface between MCUs refers to the interface used for communication between different MCUs, such as a USART serial port, and the embodiments of the present application do not impose specific restrictions on this.

[0095] Optionally, the constant current control method provided in the embodiment of the present application further includes, before determining whether the first brightness data sum exceeds the protection data threshold: determining a constant current control mode; when the constant current control mode belongs to a preset control mode, adding the first brightness data sum and the received brightness data sum corresponding to the current frame to obtain a second brightness data sum of the current frame, wherein the second brightness data sum is the brightness data sum of the entire scene of the current frame; when the second brightness data sum exceeds the preset scene data threshold corresponding to the rated power of the second power supply, executing the step of determining whether the first brightness data sum exceeds the protection data threshold.

[0096] Among them, the preset control mode refers to a constant current control mode pre-set for multiple constant current controllers, such as a control mode of two or more MCUs; the sum of the received brightness data corresponding to the current frame refers to the sum of the brightness data received by other constant current controllers for the current frame obtained by a constant current controller on the constant current board through the communication interface during the constant current control process. The communication interface refers to the interface used for communication between different constant current controllers, such as a USART serial port. The embodiment of the present application does not impose specific restrictions on this.

[0097] Specifically, after determining the constant current control mode, the embodiment of the present application can determine whether it is necessary to obtain the sum of the first brightness data received by other constant current controllers for the current frame by judging whether the constant current control mode belongs to the preset control mode; if the currently determined constant current control mode belongs to the preset control mode, the sum of the first brightness data received by other constant current controllers for the current frame can be obtained, and the sum of the first brightness data received by other constant current controllers for the current frame can be counted to calculate the sum of the received brightness data corresponding to the current frame, and then the sum of the received brightness data can be accumulated with the sum of the first brightness data determined by the constant current controller itself for the current frame, so as to calculate the brightness data sum of the entire scene of the current frame by accumulating and counting, as the sum of the second brightness data of the current frame; and when the constant current control mode does not belong to the preset control mode, the step of judging whether the sum of the first brightness data exceeds the protection data threshold can be directly executed, so as to determine whether it is necessary to perform power protection processing according to the preset current boost information and the sum of the first brightness data corresponding to the target display mode according to whether the sum of the first brightness data of the current array exceeds the preset protection data threshold, thereby realizing the control of the power of the current frame in all HDR scenes.

[0098] Optionally, after determining the constant current control mode, the constant current control method provided in the embodiment of the present application may further include: determining whether the constant current control mode belongs to a preset control mode; and when the constant current control mode does not belong to the preset control mode, executing the step of determining whether the sum of the first brightness data exceeds the protection data threshold. If the constant current control mode belongs to the preset control mode, the sum of the received brightness data corresponding to the current frame can be obtained, and the sum of the received brightness data and the sum of the first brightness data can be added to obtain the sum of the scene data of the current frame, so that it can be determined whether the sum of the scene data of the current frame exceeds the preset scene data threshold corresponding to the rated power of the second power supply to determine whether power protection processing is required.

[0099] For example, when there are n MCUs on the constant current board package for partition control, it can be determined that the current constant current control mode belongs to the preset control mode, and the sum of the brightness data received by these n MCUs for the current frame can be accumulated to obtain the sum of the brightness data of the entire scene as the second brightness data sum S_UM of the current frame, that is, S_UM=S1+S2...Sn, wherein S1 is the sum of the first brightness data received by the first MCU for the current frame, S2 is the sum of the first brightness data received by the second MCU for the current frame...and so on, S2 is the sum of the first brightness data received by the nth MCU for the current frame, and n is an integer greater than 1.

[0100] After determining the sum of the second brightness data of the current frame, the sum of the second brightness data can be compared with the scene data threshold value pre-set for the rated power of the second power supply, so as to determine whether power protection limitation is required by judging whether the sum of the second brightness data of the current frame exceeds the scene data threshold value. If the sum of the second brightness data of the current frame does not exceed the scene data threshold value, it can be considered that the current constant current controller does not need to perform power limitation for the target display mode, such as refreshing according to the preset current boost information corresponding to the direct target display mode; and when the sum of the second brightness data of the current frame exceeds the scene data threshold value, it can be determined whether the sum of the first brightness data of the current frame exceeds the preset protection data threshold value to determine whether power protection processing is required based on the preset current boost information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, so as to prevent device damage or other problems caused by the whole machine power exceeding the rated power of the first power supply. The rated power of the second power supply refers to the rated power of the total power supply.

[0101] In an optional embodiment of the present application, the constant current control method provided by the present application may further include: obtaining a preset scene data threshold corresponding to the rated power of the second power supply; judging whether the sum of the second brightness data exceeds the scene data threshold; if the sum of the second brightness data does not exceed the scene data threshold, directly refreshing according to the current boost information to obtain the refresh current of the current frame. If the sum of the second brightness data exceeds the scene data threshold, judging whether the sum of the first brightness data exceeds the protection data threshold, so that when the sum of the first brightness data exceeds the preset protection data threshold, it is considered that power protection is currently required for the area controlled by the current MCU, so that the MCU adjusts the current amplitude value according to the calculation formula I=Iset*Si / S, so as to output the refresh current according to the adjusted current amplitude value, so as to ensure that the total power supply power of the current frame does not exceed the rated power of the total power supply, thereby achieving the purpose of power protection.

[0102] As an example of this application, when n MCUs are used for partition control, in order to prevent the problem of different currents and brightness in different areas caused by different power protection modes triggered by independent operation of the MCUs, different MCUs can communicate through the USART serial port, such as Figure 4 As shown, MCU1 and MCU2 can send and receive data through the USART serial port, so the sum of the brightness data received by a single MCU in the current frame can be transmitted through the USART serial port, and then accumulated with its own first brightness data sum to obtain the second brightness data sum S_UM of the entire scene, that is, S_UM = S1 + S2 ... Sn. Among them, MCU1 is the first MCU in the partition control, MCU2 is the second MCU in the partition control ... and so on, MCUn is the nth MCU in the partition control; S1 is the sum of the first brightness data received by the first MCU for the current frame, S2 is the sum of the first brightness data received by the second MCU for the current frame ... and so on, S2 is the sum of the first brightness data received by the nth MCU for the current frame, and n is an integer greater than 1.

[0103] After determining the total second luminance data of the current frame, the total second luminance data can be compared with the scene data threshold preset for the second power rated power, so as to determine whether power protection restriction is required by judging whether the total second luminance data of the current frame exceeds the scene data threshold. Among them, the scene data threshold, as a preset protection point, can specifically be the sum of the protection data thresholds set for n MCUs. For example, when the protection data threshold set for the first MCU is recorded as Si1, the protection data threshold set for the second MCU can be recorded as Si2... and so on. The protection data threshold set for the nth MCU can be recorded as Sin. Furthermore, the scene data threshold preset for the second power rated power can be recorded as (Si1 + Si2 +... + Sin) as the preset protection point, and compared with the sum S_UM of the second luminance data of the entire scene of the current frame, so as to judge whether the total second luminance data is less than the scene data threshold corresponding to the second power rated power, that is, to judge whether the sum S_UM of the second luminance data of the entire scene of the current frame is less than the set protection point; if the sum S_UM of the second luminance data of the entire scene of the current frame is less than the set protection point, that is, S_UM < (Si1 + Si2 +... + Sin), the area controlled by the current MCU can be directly refreshed according to the current increase information. For example, the increased current amplitude Iset set for HDR is used as the amplitude of the refreshed current, so as to determine the HDR increased current as the refreshed current I of the current frame, that is, I = Iset; if the sum S_UM of the second luminance data of the entire scene of the current frame is not less than the set protection point, for example, when the sum S_UM of the second luminance data of the entire scene of the current frame is greater than the set protection point, it is necessary to make a judgment again to judge whether the total first luminance data Sn controlled by the current MCU is greater than the power rated power point Sin preset for the MCU; if the total first luminance data Sn controlled by the current MCU is not greater than the power rated power point Sin preset for the MCU, for example, when the total first luminance data Sn controlled by the current MCU is less than the power rated power point Sin preset for the MCU, that is, Sn < Sin, the current MCU can still refresh the data according to I = Iset. If the total first luminance data Sn controlled by the current MCU is greater than the power rated power point Sin preset for the MCU, that is, Sn > Sin, power protection needs to be performed on the area controlled by the current MCU. The MCU can refresh the data of the current frame according to I = Iset * Sin / Sn to ensure that the total power of the current frame does not exceed the rated power, so as to achieve the purpose of power protection.

[0104] It should be noted that, for the purpose of simple description, the method embodiments are expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited to the described order of actions, because according to the embodiments of the present application, certain steps may be performed in other orders or simultaneously.

[0105] Reference Figure 5 , shows a structural block diagram of a constant current control device provided by an embodiment of the present application. Figure 5 As shown, the constant current control device may specifically include the following modules:

[0106] The brightness data acquisition module 510 is used to acquire the picture brightness data;

[0107] A mode determination module 520, configured to determine a picture display mode according to the picture brightness data;

[0108] A first brightness data sum determination module 530, configured to determine the first brightness data sum of the current frame according to the picture brightness data when the picture display mode is the target display mode;

[0109] A power protection processing module 540 is used to perform power protection processing according to the preset current boost information corresponding to the target display mode, in combination with the rated power of the first power supply and the sum of the first brightness data, to obtain a refresh current of the current frame when the sum of the first brightness data exceeds a preset protection data threshold;

[0110] The driving signal output module 550 is used to output a constant current driving signal corresponding to the picture brightness data according to the refresh current.

[0111] Optionally, the first brightness data sum determination module 530 includes the following submodules:

[0112] an extraction submodule, configured to extract brightness data of a current frame from the brightness data of the picture when the picture display mode is a target display mode;

[0113] The accumulation submodule is used to accumulate the brightness data of the current frame to obtain the sum of the first brightness data of the current frame.

[0114] Optionally, the constant current control device further includes:

[0115] A rated power determination module, used to determine the rated power of the first power supply;

[0116] A protection data threshold determination module, configured to determine the protection data threshold based on the rated power of the first power supply;

[0117] A first brightness data sum judgment module is used to judge whether the first brightness data sum exceeds the protection data threshold; if the first brightness data sum exceeds the protection data threshold, the power protection processing module 540 is triggered to perform power protection processing according to the preset current boost information corresponding to the target display mode, combined with the rated power of the first power supply and the first brightness data sum; if the first brightness data sum does not exceed the brightness protection data, the refresh module is triggered to directly refresh according to the current boost information to obtain the refresh current of the current frame;

[0118] A refresh module is used to directly refresh according to the current boost information to obtain a refresh current of the current frame.

[0119] Optionally, the constant current control device further includes:

[0120] A constant current control mode determination module, used to determine the constant current control mode;

[0121] A second brightness data summation module, configured to add the first brightness data summation and the received brightness data summation corresponding to the current frame to obtain a second brightness data summation of the current frame when the constant current control mode belongs to a preset control mode, wherein the second brightness data summation is the brightness data sum of the entire scene of the current frame;

[0122] The trigger module is used to trigger the first brightness data sum judgment module to execute the step of judging whether the first brightness data sum exceeds the protection data threshold when the second brightness data sum exceeds the preset scene data threshold corresponding to the rated power of the second power supply.

[0123] Optionally, the second brightness data summation module includes:

[0124] An acquisition submodule, used to acquire the sum of received brightness data corresponding to the current frame;

[0125] The accumulation submodule is used to accumulate the first brightness data sum and the received brightness data sum corresponding to the current frame to obtain the second brightness data sum of the current frame.

[0126] Optionally, the constant current control device further includes:

[0127] A constant current control mode judgment module, used to judge whether the constant current control mode belongs to a preset control mode;

[0128] The judgment trigger module is used to trigger the first brightness data sum judgment module to execute the step of judging whether the first brightness data sum exceeds the protection data threshold when the constant current control mode does not belong to the preset control mode.

[0129] Optionally, the constant current control device further includes:

[0130] A scene data threshold acquisition module, used to acquire a preset scene data threshold corresponding to the rated power of the second power supply;

[0131] The scene data judgment module is used to judge whether the sum of the second brightness data exceeds the scene data threshold; if the sum of the second brightness data does not exceed the scene data threshold, the refresh module is triggered to directly refresh according to the current boost information to obtain the refresh current of the current frame. The refresh module is used to directly refresh according to the current boost information to obtain the refresh current of the current frame.

[0132] Optionally, the power protection processing module 540 includes:

[0133] a calculation submodule, configured to perform ratio calculation based on the sum of the first brightness data and the rated power of the first power supply to obtain ratio information;

[0134] An adjustment submodule, configured to adjust the current boost information based on the ratio information to obtain current adjustment information;

[0135] The refresh submodule is used to refresh according to the current adjustment information to obtain the refresh current of the current frame.

[0136] Optionally, the calculation submodule is specifically used to: obtain an adjustment ratio by dividing the rated power of the first power supply by the sum of the first brightness data; and determine the adjustment ratio as the ratio information.

[0137] Optionally, the adjustment submodule is specifically used to: determine the current amplitude using the current boost information; obtain the current adjustment amplitude by multiplying the current amplitude by the adjustment ratio; and determine the current adjustment amplitude as the current adjustment information.

[0138] In a specific implementation, the constant current control device provided in the present implementation can be applied to a constant current board, such as an MCU on a constant current board as a constant current controller, so that the constant current controller obtains picture brightness data and determines a picture display mode based on the picture brightness data, so that when the picture display mode is a target display mode, the sum of the first brightness data of the current frame is determined according to the picture brightness data. Therefore, when the sum of the first brightness data exceeds a preset protection data threshold, power protection processing can be performed based on the preset current boost information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, to obtain a refresh current of the current frame, and output a constant current drive signal corresponding to the picture brightness data according to the refresh current, thereby preventing the problem of unstable operation of the whole machine power supply caused by the power storage of the whole machine exceeding the limit rated power of the power supply, thereby ensuring the stable operation of the whole machine power supply and the stability of the whole machine system.

[0139] like Figure 6 As shown, an embodiment of the present application provides an electronic device, including a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114, and the memory 113 is used to store computer programs; the processor 111 is used to implement the steps of the constant current control method provided by any of the aforementioned method embodiments when executing the program stored in the memory 113.

[0140] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the constant current control method provided in any of the aforementioned method embodiments are implemented.

[0141] The above-described apparatus, device, medium and system embodiments are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0142] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0143] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0144] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A constant current control method, characterized in that: include: Get the screen brightness data; Determine a picture display mode according to the picture brightness data; When the picture display mode is the target display mode, determining the sum of first brightness data of the current frame according to the picture brightness data; When the sum of the first brightness data exceeds a preset protection data threshold, power protection processing is performed according to preset current boost information corresponding to the target display mode, combined with the rated power of the first power supply and the sum of the first brightness data, to obtain a refresh current of the current frame; According to the refresh current, a constant current driving signal corresponding to the picture brightness data is output.

2. The method according to claim 1, characterized in that When the picture display mode is the target display mode, determining the sum of first brightness data of the current frame according to the picture brightness data includes: When the picture display mode is the target display mode, extracting brightness data of the current frame from the picture brightness data; The brightness data of the current frame is accumulated to obtain the first brightness data sum of the current frame.

3. The method according to claim 2, characterized in that After determining the sum of the first brightness data of the current frame according to the picture brightness data, the method further includes: Determining the rated power of the first power supply; Determining the protection data threshold based on the rated power of the first power supply; Determining whether the first brightness data sum exceeds the protection data threshold; If the sum of the first brightness data does not exceed the protection data threshold, the refresh is directly performed according to the current boost information to obtain the refresh current of the current frame.

4. The method according to claim 3, characterized in that Before determining whether the first brightness data sum exceeds the protection data threshold, the method further includes: Determine the constant current control method; In the case where the constant current control mode belongs to the preset control mode, the first brightness data sum is added to the received brightness data sum corresponding to the current frame to obtain the second brightness data sum of the current frame, where the second brightness data sum is the brightness data sum of the entire scene of the current frame; In a case where the second brightness data sum exceeds a preset scene data threshold corresponding to the rated power of the second power supply, a step of determining whether the first brightness data sum exceeds the protection data threshold is performed.

5. The method according to claim 4, characterized in that After the constant current control mode is determined, the method further includes: Determining whether the constant current control mode belongs to a preset control mode; In the case that the constant current control mode does not belong to the preset control mode, a step of determining whether the first brightness data sum exceeds the protection data threshold is performed.

6. The method according to claim 4, characterized in that After the first brightness data sum is added to the received brightness data sum corresponding to the current frame to obtain the second brightness data sum of the current frame, the method further includes: Obtaining a preset scene data threshold corresponding to the rated power of the second power supply; Determining whether the second brightness data sum exceeds the scene data threshold; If the sum of the second brightness data does not exceed the scene data threshold, the refresh is performed directly according to the current boost information to obtain the refresh current of the current frame.

7. The method according to claim 2, characterized in that The step of performing power protection processing according to the preset current boost information corresponding to the target display mode and combining the rated power of the first power supply and the sum of the first brightness data to obtain the refresh current of the current frame includes: Performing a ratio calculation based on the sum of the first brightness data and the rated power of the first power supply to obtain ratio information; Adjusting the current boost information based on the ratio information to obtain current adjustment information; Refresh is performed according to the current adjustment information to obtain the refresh current of the current frame.

8. The method according to claim 7, characterized in that The step of performing a ratio calculation based on the sum of the first brightness data and the first power supply rated power to obtain the ratio information includes: dividing the first power supply rated power by the sum of the first brightness data to obtain an adjustment ratio; and determining the adjustment ratio as the ratio information; The adjusting the current boost information based on the ratio information to obtain the current adjustment information includes: using the current boost information to determine the current amplitude; multiplying the current amplitude by the adjustment ratio to obtain the current adjustment amplitude; and determining the current adjustment amplitude as the current adjustment information.

9. A constant current control device, characterized in that: include: A brightness data acquisition module is used to acquire picture brightness data; A mode determination module, used for determining a picture display mode according to the picture brightness data; A first brightness data sum determination module, configured to determine the first brightness data sum of the current frame according to the picture brightness data when the picture display mode is the target display mode; A power protection processing module, configured to perform power protection processing according to preset current boost information corresponding to the target display mode, in combination with the rated power of the first power supply and the sum of the first brightness data, to obtain a refresh current of the current frame when the sum of the first brightness data exceeds a preset protection data threshold; The driving signal output module is used to output a constant current driving signal corresponding to the picture brightness data according to the refresh current.

10. An electronic device, characterized in that: include: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; Memory, used to store computer programs; The processor is used to implement the steps of the constant current control method as described in any one of claims 1 to 8 when executing the program stored in the memory.

Images