Backlight control method, device and equipment, readable storage medium and program product

Abstract

The invention relates to a backlight control method, device and equipment, a readable storage medium and a program product. The method comprises the following steps: acquiring respective brightness requirements of a plurality of backlight partitions in a backlight module and the number of channels corresponding to a plurality of light emitting diodes in each backlight partition; each light emitting diode is connected with at least one channel of the backlight driver; the backlight driver is connected with the plurality of backlight partitions; determining channel data corresponding to a plurality of channels in the backlight driver according to the brightness requirements of the plurality of backlight partitions and the number of channels corresponding to the plurality of light emitting diodes in each backlight partition; and sending the channel data to a backlight driver to indicate the backlight driver to output a driving current according to the data of the current bit in the channel data and indicate the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the channel data. By adopting the method, the backlight control efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight control method, device, equipment, readable storage medium and program product. Background Art

[0002] The LCD (Liquid Crystal Display) backlight module mainly uses Local dimming technology to adjust the brightness. Local dimming technology calculates the LCD pixel data in partitions, and then turns the backlight of the partition on and off to achieve partitioned brightness control, thereby improving the brightness and darkness of the display.

[0003] In order to adjust the local brightness, the traditional backlight control method often uses current regulation or pulse width modulation (PWM). Since pulse width modulation cannot be continued when the PWM duty cycle reaches 100%, it is necessary to use current regulation to achieve backlight control. However, the driving current of the backlight driver is set uniformly. When adjusting the current, it is necessary to terminate the current driving current and reset the adjusted current. Resetting the current will bring about a specific transmission delay. Therefore, the traditional method has the problem of low backlight control efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a backlight control method, apparatus, computer device, computer-readable storage medium and computer program product that can improve backlight control efficiency in response to the above technical problems.

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

[0006] Obtaining the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; connecting each light-emitting diode to at least one channel of the backlight driver; and connecting the backlight driver to the multiple backlight partitions;

[0007] Determine channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition;

[0008] The channel data is sent to the backlight driver to instruct the backlight driver to output a driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the channel data.

[0009] In one embodiment, determining channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition includes:

[0010] For any LED, determine the brightness requirements of each channel connected to the current LED according to the brightness requirements of the backlight partition where the current LED is located and the number of channels corresponding to the current LED;

[0011] According to the brightness requirements of the multiple channels in the backlight driver, channel data corresponding to the multiple channels in the backlight driver are determined.

[0012] In one embodiment, determining channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple channels in the backlight driver includes:

[0013] Obtaining a preset mapping relationship, where the preset mapping relationship is used to characterize the corresponding relationship between the current gear, the pulse width modulation gear and the brightness requirement;

[0014] For any channel in the backlight driver, query the preset mapping relationship to determine the multiple current gears corresponding to the brightness requirement of the current channel, and the pulse width modulation gear corresponding to each current gear; determine the target current gear among the multiple current gears, and determine the current bit data in the channel data corresponding to the current channel according to the target current gear, and determine the pulse width modulation bit data in the channel data corresponding to the current channel according to the pulse width modulation gear corresponding to the target current gear.

[0015] In one embodiment, querying a preset mapping relationship to determine a plurality of current gears corresponding to the brightness requirement of the current channel and a pulse width modulation gear corresponding to each current gear includes:

[0016] Obtain the current limit value of the current channel from the preset data area, and determine the brightness peak value according to the current limit value;

[0017] When the brightness requirement of the current channel does not exceed the brightness peak, the preset mapping relationship is queried to determine multiple current gears corresponding to the brightness requirement of the current channel and the pulse width modulation gear corresponding to each current gear.

[0018] In one embodiment, the backlight control method further includes:

[0019] Obtain the brightness requirement change of each of the multiple backlight partitions;

[0020] Update channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirement change;

[0021] The updated channel data is sent to the backlight driver to instruct the backlight driver to output a driving current according to the data of the current bit in the updated channel data, and to instruct the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the updated channel data.

[0022] In one embodiment, updating the channel data corresponding to each of the plurality of channels in the backlight driver according to the brightness requirement change includes:

[0023] When the brightness requirement change is within a preset range and the data of the pulse width modulation bit in the channel data corresponding to any channel is less than a preset value, the data of the pulse width modulation bit in the channel data corresponding to each of the multiple channels in the backlight driver are updated according to the brightness requirement change;

[0024] When the brightness requirement change is within a preset range and the pulse width modulation bit data in the channel data corresponding to all channels are equal to preset values, the current bit data in the channel data corresponding to each of the multiple channels in the backlight driver are updated according to the brightness requirement change.

[0025] In a second aspect, the present application further provides a backlight control device, comprising:

[0026] An acquisition module is used to acquire the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; each light-emitting diode is connected to at least one channel of the backlight driver; and the backlight driver is connected to the multiple backlight partitions;

[0027] A determination module, used to determine channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition;

[0028] The output module is used to send the channel data to the backlight driver to instruct the backlight driver to output the driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output the pulse width modulation signal according to the data of the pulse width modulation bit in the channel data.

[0029] In a third aspect, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0030] Obtaining the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; connecting each light-emitting diode to at least one channel of the backlight driver; and connecting the backlight driver to the multiple backlight partitions;

[0031] Determine channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition;

[0032] The channel data is sent to the backlight driver to instruct the backlight driver to output a driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the channel data.

[0033] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0034] Obtaining the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; connecting each light-emitting diode to at least one channel of the backlight driver; and connecting the backlight driver to the multiple backlight partitions;

[0035] Determine channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition;

[0036] The channel data is sent to the backlight driver to instruct the backlight driver to output a driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the channel data.

[0037] In a fifth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0038] Obtaining the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; connecting each light-emitting diode to at least one channel of the backlight driver; and connecting the backlight driver to the multiple backlight partitions;

[0039] Determine channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition;

[0040] The channel data is sent to the backlight driver to instruct the backlight driver to output a driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the channel data.

[0041] The above-mentioned backlight control method, device, computer equipment, computer-readable storage medium and computer program product obtain the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition, and determine the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements and the number of channels. The channel data includes a current bit for adjusting the driving current and a pulse width modulation bit for adjusting the pulse width modulation signal. The backlight driver can synchronously set the driving current and the pulse width modulation signal according to the channel data, which is beneficial to the real-time adjustment of the driving current and the pulse width modulation signal, avoiding the transmission delay caused by resetting the current, thereby improving the backlight control efficiency; at the same time, the current bit is added to the channel data, which increases the controllable brightness range of the backlight, which is beneficial to improving the backlight control efficiency in scenarios with a large brightness adjustment range. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0043] FIG1 is a diagram showing an application environment of a backlight control method according to an embodiment;

[0044] FIG2 is a schematic flow chart of a backlight control method in one embodiment;

[0045] FIG3 is a schematic diagram of a transmission mode of channel data in one embodiment;

[0046] FIG4 is a schematic diagram of the driving current output by each channel in one embodiment;

[0047] FIG5 is a schematic diagram of a transmission mode of channel data in another embodiment;

[0048] FIG6 is a schematic diagram of the driving current output by each channel in another embodiment;

[0049] FIG7 is a schematic diagram of a transmission mode of channel data in yet another embodiment;

[0050] FIG8 is a structural block diagram of a backlight control device in one embodiment;

[0051] FIG. 9 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] LCD backlight modules mainly use Local dimming technology for brightness adjustment. Local dimming technology partitions the LCD pixel data and then turns the partitioned backlight on and off to achieve partitioned brightness control, thereby improving the brightness and dark contrast of the display screen. In the actual application needs of HUD (Head up Display) / AR-HUD (Augmented Reality Head Up Display), it is a screen "addition" concept, and relevant information needs to be displayed at specific locations or required locations. In order to meet the application field display needs of regional backlight brightness control, for example, AR-HUD applications, a method that can ensure real-time control of backlight brightness is urgently needed.

[0054] In the backlight control method based on Local dimming technology, the basic requirement is usually to light up the backlight at A brightness in the whole area and light up B brightness locally, where B brightness is greater than A brightness. To achieve the above backlight brightness control, current regulation or pulse width modulation is often used in traditional methods. Pulse width modulation technology controls the switching time of the LCD backlight so that the LCD screen can be received or shielded by the human eye, thereby producing different screen brightness. For example, under a fixed current, when displaying A brightness, if the PWM duty cycle does not reach 100%, the PWM duty cycle can be increased to achieve local lighting of B brightness; if the PWM duty cycle reaches 100%, pulse width modulation cannot be continued, and current regulation is required to achieve backlight control. However, the driving current of the backlight driver is set uniformly. When adjusting the current, the current driving current needs to be terminated and the adjusted current needs to be reset. Resetting the current will bring about a specific transmission delay. Therefore, the traditional method has the problem of low backlight control efficiency.

[0055] Based on this, an embodiment of the present application proposes a backlight control method, which obtains the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; each light-emitting diode is connected to at least one channel of the backlight driver; the backlight driver is connected to the multiple backlight partitions; according to the brightness requirements of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition, the channel data corresponding to each of the multiple channels in the backlight driver are determined; the channel data is sent to the backlight driver to instruct the backlight driver to output a driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the channel data. Since the channel data includes the current bit for adjusting the driving current and the pulse width modulation bit for adjusting the pulse width modulation signal, the backlight driver can synchronously set the driving current and the pulse width modulation signal according to the channel data, which is beneficial to the real-time adjustment of the driving current and the pulse width modulation signal and avoids the transmission delay caused by resetting the current, thereby improving the backlight control efficiency; at the same time, the current bit is added to the channel data, which increases the controllable brightness range of the backlight, which is beneficial to improving the backlight control efficiency in scenarios with a large brightness adjustment range.

[0056] The backlight control method provided in the embodiment of the present application can be applied in the application environment as shown in FIG1. ​​The backlight control method can be applied to a backlight control system, which includes a backlight module 102 and a controller 104. The backlight module 102 includes a backlight driver 106 and a plurality of backlight partitions 108. The plurality of backlight partitions 108 include backlight partitions 1 to backlight partitions N. The backlight driver 106 can be connected to the plurality of backlight partitions 108 to output a driving current and a pulse width modulation signal to the connected backlight partitions. Each backlight partition includes a plurality of light-emitting diodes, and each light-emitting diode is connected to at least one channel of the backlight driver 106. The controller 104 is connected to the backlight module 102, and is used to obtain the brightness requirements of each of the multiple backlight partitions 108 in the backlight module 102 and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; determine the channel data corresponding to each of the multiple channels in the backlight driver 106 according to the brightness requirements of each of the multiple backlight partitions 108 and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; send the channel data to the backlight driver 106 to instruct the backlight driver 106 to output the driving current according to the data of the current bit in the channel data, and instruct the backlight driver 106 to output the pulse width modulation signal according to the data of the pulse width modulation bit in the channel data. Among them, the controller 104 can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, Internet of Things devices and portable wearable devices, and the Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart car devices, projection devices, etc. Portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The head mounted device may be a virtual reality (VR) device, an augmented reality (AR) device, smart glasses, etc.

[0057] In an exemplary embodiment, as shown in FIG2 , a backlight control method is provided, which is described by taking the method applied to the controller 104 in FIG1 as an example, and includes the following steps 202 to 206 . Among them:

[0058] Step 202, obtaining the brightness requirements of the multiple backlight partitions in the backlight module and the number of channels corresponding to the multiple light-emitting diodes in each backlight partition; each light-emitting diode is connected to at least one channel of the backlight driver; and the backlight driver is connected to the multiple backlight partitions.

[0059] Among them, the backlight module refers to the module used to provide background light in the LCD display device. Multiple backlight partitions refer to multiple different areas in the backlight module. Brightness requirement refers to the brightness required for each backlight partition, which can be set based on user needs. For example, in the HUD / AR-HUD scenario, relevant information needs to be displayed in a specific location. Therefore, different backlight partitions have different brightness requirements.

[0060] The backlight driver refers to the driving circuit connected to the backlight partition, which is used to drive the light-emitting diodes in the connected backlight partition to light up. A single backlight driver can be connected to one or more backlight partitions. There can be one or more backlight drivers used to drive the entire backlight module, which can be determined according to the size of the backlight module and user needs.

[0061] The backlight driver has multiple channels, for example, the backlight driver may have 4 channels, 8 channels, or 48 channels, etc. Each light-emitting diode may be connected to at least one channel of the backlight driver, and each channel may independently control the brightness of the connected light-emitting diode. The number of channels refers to the number of channels connected to each light-emitting diode, and the number of channels corresponding to each light-emitting diode may be the same or different.

[0062] Step 204 : determining channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition.

[0063] The channel data refers to the key information of the backlight driver controlling the light-emitting state of the light-emitting diodes under each channel. Exemplarily, the channel data can be 16-bit binary data. In a conventional backlight driver, the channel data is used for pulse width modulation. The channel data in the embodiment of the present application is composed of a current bit and a pulse width modulation bit, which can be used for synchronous setting and adjustment of the drive current and the pulse width modulation signal.

[0064] Since the brightness requirement of each backlight partition may be different and the number of channels connected to each light-emitting diode may be different, each channel may provide a different driving current and pulse width modulation signal. Accordingly, the channel data of each channel may be determined according to the brightness requirement and the number of channels.

[0065] FIG3 is a schematic diagram of a transmission mode of channel data in an embodiment. The backlight driver includes 48 channels, each channel corresponds to 16-bit channel data, and the channel data does not contain a current bit, that is, the 16-bit channel data is used for the backlight driver to output a pulse width modulation signal. FIG4 is a schematic diagram of the drive current output by each channel in an embodiment. It can be seen from the figure that the drive current output by channel 1 and channel m is the same.

[0066] As shown in Figure 5, it is a schematic diagram of the transmission mode of channel data in another embodiment. Among them, the backlight driver includes 48 channels, each channel corresponds to 16-bit channel data, the channel data contains 4-bit current bits, 12-bit pulse width modulation bits, the data in the 4-bit current bits are used for the backlight driver to output the driving current, and the 12-bit channel data are used for the backlight driver to output the pulse width modulation signal. The current bits and pulse width modulation bits can also be other numbers and combinations, which can be flexibly adjusted according to actual needs. As shown in Figure 6, it is a schematic diagram of the driving current output by each channel in another embodiment. As can be seen from the figure, the driving current output by channel 1 and channel m is different. Since the channel data corresponding to each channel contains the current bit, the driving current output by each channel can be set and adjusted in real time according to the brightness requirement.

[0067] In some embodiments, the 12-bit pulse width modulation bit can adjust the PWM pulse width to 4096 levels, which can meet the backlight resolution requirements in most scenarios. In addition, the 4-bit current bit can increase the controllable brightness levels by 16 times to 65536 levels. At the same time, adding the current bit to the channel data can adjust the driving current based on the pulse width modulation, thereby increasing the controllable brightness range of the backlight.

[0068] Step 206 , sending the channel data to the backlight driver to instruct the backlight driver to output a driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the channel data.

[0069] The current bit data in the channel data indicates the gear of the driving current. For example, the current bit is composed of 4-bit channel data, which can indicate 16 gears of the driving current. The gear of the driving current indicated by the current bit can determine the current value of the driving current. For example, each current gear of the driving current differs by 1mA, and 16 gears can ensure that the driving current is adjusted within a current range of 16mA.

[0070] The data of the pulse width modulation bit in the channel data indicates the gear of the PWM duty cycle. For example, the PWM duty cycle can be 0-100%. The pulse width modulation bit is composed of 12-bit channel data, which can indicate 4096 gears of the PWM duty cycle. The gear of the PWM duty cycle indicated by the pulse width modulation bit can determine the PWM duty cycle. That is, the 0-100% PWM duty cycle has a pulse width adjustment accuracy of 4096 gears, plus the current adjustment accuracy of 16 gears, which greatly improves the adjustment accuracy and adjustment range of the backlight brightness.

[0071] The controller sends the channel data to the backlight driver to instruct the backlight driver to output the corresponding driving current according to the driving current gear indicated by the current bit. At the same time, it can instruct the backlight driver to output the corresponding pulse width modulation signal according to the PWM duty cycle gear indicated by the pulse width modulation bit.

[0072] In the above-mentioned backlight control method, by obtaining the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition, the channel data corresponding to each of the multiple channels in the backlight driver are determined according to the brightness requirements and the number of channels. The channel data includes a current bit for adjusting the driving current and a pulse width modulation bit for adjusting the pulse width modulation signal. The backlight driver can synchronously set the driving current and the pulse width modulation signal according to the channel data, which is beneficial to real-time adjustment of the driving current and the pulse width modulation signal, avoiding transmission delays caused by resetting the current, thereby improving the backlight control efficiency; at the same time, the current bit is added to the channel data, which increases the controllable brightness range of the backlight, which is beneficial to improving the backlight control efficiency in scenarios with a large brightness adjustment range.

[0073] In an exemplary embodiment, channel data corresponding to each of the multiple channels in the backlight driver is determined based on the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple LEDs in each backlight partition, including: for any LED, determining the brightness requirements of each of the channels connected to the current LED based on the brightness requirements of the backlight partition in which the current LED is located and the number of channels corresponding to the current LED; determining the channel data corresponding to each of the multiple channels in the backlight driver based on the brightness requirements of each of the multiple channels in the backlight driver.

[0074] Since each LED can be connected to at least one channel, the required brightness of the LED can be obtained by superimposing at least one channel. The LEDs in each backlight partition often have the same brightness requirement, and the brightness requirement of the backlight partition where the current LED is located is the brightness requirement of the current LED.

[0075] For any LED, the controller divides the brightness requirement of the backlight partition where the current LED is located by the number of channels corresponding to the current LED to obtain the brightness requirements of each channel connected to each current LED.

[0076] In some embodiments, the brightness of each light-emitting diode can also be controlled individually. The controller can directly obtain the brightness requirement of the light-emitting diode to be controlled, divide the brightness requirement of the light-emitting diode to be controlled by the number of channels corresponding to the light-emitting diode to be controlled, and obtain the brightness requirements of each channel connected to the light-emitting diode to be controlled. Then, the channel data corresponding to each channel is determined based on the brightness requirements of each channel, thereby achieving individual control of the light-emitting diode to be controlled.

[0077] After the brightness requirement of the channel is determined, the controller can determine the current value and pulse width modulation data corresponding to the brightness requirement, that is, the PWM duty cycle, and then determine the current bit data in the channel data based on the current value, and determine the pulse width modulation bit data in the channel data based on the pulse width modulation data.

[0078] In this embodiment, the brightness requirements of each channel connected to the current LED are determined by the brightness requirements of the backlight partition where the current LED is located and the number of channels corresponding to the current LED. In this way, the brightness requirements of multiple channels in the backlight driver can be determined, and then the corresponding channel data is determined according to the brightness requirements of each channel. The channel data of multiple channels are superimposed to jointly provide driving current and pulse width modulation signals to the connected LEDs to meet the brightness requirements of each backlight partition, which is beneficial to improving the accuracy and flexibility of backlight control.

[0079] In an exemplary embodiment, channel data corresponding to each of the multiple channels in the backlight driver is determined according to the brightness requirements of each of the multiple channels in the backlight driver, including: obtaining a preset mapping relationship, the preset mapping relationship is used to characterize the correspondence between the current gear, the pulse width modulation gear and the brightness requirement; for any channel in the backlight driver, querying the preset mapping relationship to determine the multiple current gears corresponding to the brightness requirement of the current channel, and the pulse width modulation gear corresponding to each current gear; determining a target current gear among the multiple current gears, and determining the current bit data in the channel data corresponding to the current channel according to the target current gear, and determining the pulse width modulation bit data in the channel data corresponding to the current channel according to the pulse width modulation gear corresponding to the target current gear.

[0080] Among them, the preset mapping relationship is a corresponding relationship pre-stored in the controller, which is used to characterize the corresponding relationship between the current gear, the pulse width modulation gear and the brightness requirement. There are multiple current positions, and different current position data corresponds to different current positions. For example, the current position is 4 bits, and different current position data can correspond to a total of 16 current positions. Similarly, there are multiple pulse width modulation positions, and different pulse width modulation positions correspond to different pulse width modulation data. For example, the pulse width modulation position has 12 bits, and different pulse width modulation position data can correspond to a total of 4096 pulse width modulation positions. Under different current positions, the backlight driver can output different driving currents; under different pulse width modulation positions, the backlight driver can output different pulse width modulation signals.

[0081] Since each current gear has a brightness adjustment range of 4096 pulse width modulation gears, a single brightness requirement can correspond to a combination of multiple current gears and pulse width modulation gears. In some embodiments, the controller can query the preset mapping relationship to determine multiple current gears corresponding to the brightness requirements of the current channel, and the pulse width modulation gear corresponding to each current gear. Since the brightness is also affected by other external factors in the actual environment, the controller can determine the target current gear among multiple current gears through a preset experimental curve, and the preset experimental curve can be obtained through multiple experiments.

[0082] In some embodiments, the smallest current level among the multiple current levels may be used as the target current level, which is helpful to ensure that the driving current output by the backlight driver is minimized and to reduce the power consumption of the backlight driver.

[0083] The controller can determine the data of the current bit in the channel data according to the target current gear, and determine the data of the pulse width modulation bit in the channel data according to the pulse width modulation gear corresponding to the target current gear. For example, when the target current gear is 0, the data of the current bit is 0000, and when the target current gear is 7, the data of the current bit is 01111.

[0084] In this embodiment, by querying the preset mapping relationship, the combination of multiple current gears and pulse width modulation gears corresponding to the brightness requirements can be determined, and then the target current gear is determined among the multiple current gears, so as to determine the current position data according to the target current gear, and determine the pulse width modulation position data according to the pulse width modulation gear corresponding to the target current gear. This method of searching for the preset mapping relationship improves the efficiency and accuracy of determining the channel data, which is beneficial to improving the backlight control efficiency.

[0085] In an exemplary embodiment, a preset mapping relationship is queried to determine multiple current gears corresponding to the brightness requirement of the current channel and the pulse width modulation gear corresponding to each current gear, including: obtaining the current limit of the current channel from a preset data area, and determining the brightness peak value according to the current limit value; when the brightness requirement of the current channel does not exceed the brightness peak value, the preset mapping relationship is queried to determine multiple current gears corresponding to the brightness requirement of the current channel and the pulse width modulation gear corresponding to each current gear.

[0086] Among them, in some embodiments, in order to ensure the safety and stability of the circuit system, the current of each channel has a certain limit, that is, the current limit. For example, the maximum driving current that the backlight driver can output can be used as the current limit. The preset data area is a space for storing basic setting data in the controller. For example, the preset data area can store data such as the maximum gain and maximum current of each channel. The current limit determines the maximum brightness of the backlight, that is, the peak brightness. The peak brightness can be determined by the correspondence between the current limit and the brightness limit. Exemplarily, the peak brightness can be the brightness provided by the current channel when the driving current is the current limit and the pulse width modulation data is a preset ratio, for example, the preset ratio is 100%.

[0087] The controller compares the brightness requirement of the current channel with the brightness peak value. If the brightness peak value is not exceeded, the controller uses the method of querying the preset mapping relationship to determine the current gear and pulse width modulation gear corresponding to the brightness requirement of the current channel.

[0088] In this embodiment, the brightness peak is determined by obtaining the current limit value of the current channel in the preset data area. When the brightness requirement of the current channel does not exceed the brightness peak, the current level and pulse width modulation level that can meet the brightness requirement of the current channel are determined by querying the preset mapping relationship, thereby avoiding circuit system failure and backlight module damage caused by excessive drive current output by the backlight driver, which is beneficial to ensuring the safety and stability of the backlight module.

[0089] In an exemplary embodiment, the backlight control method also includes: obtaining the brightness requirement change of each of the multiple backlight partitions; updating the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirement change; sending the updated channel data to the backlight driver to instruct the backlight driver to output the driving current according to the current bit data in the updated channel data, and to instruct the backlight driver to output the pulse width modulation signal according to the pulse width modulation bit data in the updated channel data.

[0090] The brightness requirement change refers to the brightness that needs to be increased or decreased based on the current brightness. For example, in the actual application scenario of HUD / AR-HUD, the brightness of some backlight partitions may need to be enhanced, and the brightness of other backlight partitions may need to be reduced or remain unchanged. When the brightness of the backlight partitions needs to be adjusted, the backlight control method of the embodiment of the present application can update the channel data in real time according to the brightness requirement change of each backlight partition, thereby updating the drive current and pulse width modulation signal in real time without stopping the output of the drive current, which can avoid the transmission delay problem.

[0091] For example, if the required change in brightness is to increase the preset brightness, the current bit or pulse width modulation bit in the channel data can be increased to obtain updated channel data. The controller sends the updated channel data to the backlight driver, and the backlight driver can output the corresponding driving current and pulse width modulation signal according to the updated channel data.

[0092] In the present embodiment, for the scenario where the brightness requirement of the backlight partition needs to be adjusted, the channel data of each channel can be adjusted in real time, thereby instructing the backlight driver to dynamically update the output drive current and pulse width modulation signal. Compared with the traditional method that needs to stop the output to reset the drive current, it can avoid transmission delays, which is beneficial to improving the backlight adjustment efficiency. In addition, the drive current and pulse width modulation signal can be adjusted synchronously, which increases the controllable brightness range of the backlight, and is beneficial to the differentiated brightness adjustment of each backlight partition.

[0093] In an exemplary embodiment, channel data corresponding to each of the multiple channels in the backlight driver are updated according to the brightness requirement change, including: when the brightness requirement change is within a preset range and the data of the pulse width modulation bit in the channel data corresponding to any channel is less than a preset value, updating the data of the pulse width modulation bit in the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirement change; when the brightness requirement change is within a preset range and the data of the pulse width modulation bit in the channel data corresponding to all channels are equal to the preset value, updating the data of the current bit in the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirement change.

[0094] The preset interval refers to the maximum adjustment interval of the brightness demand change in a single current gear. For example, the first boundary value of the preset interval can be the brightness value corresponding to the minimum pulse width modulation gear in a single current gear, and the second boundary value of the preset interval can be the brightness value corresponding to the maximum pulse width modulation gear in a single current gear. If the brightness demand change is within the preset interval, it indicates that the brightness change can be achieved by adjusting only the pulse width modulation bit in the channel data; if the brightness demand change exceeds the preset interval, it indicates that the brightness change needs to be achieved by adjusting the current bit in the channel data.

[0095] The preset value refers to the data limit of the pulse width modulation bit, for example, it can be the data when the PWM duty cycle is 100%. When the brightness demand change is within the preset range, and the data of the pulse width modulation bit in the channel data corresponding to any channel is less than the preset value, the data of the pulse width modulation bit in the channel data corresponding to each of the multiple channels in the backlight driver is updated according to the brightness demand change, which is conducive to improving the precision and accuracy of brightness adjustment.

[0096] When the change in brightness demand is within a preset range and the data of the pulse width modulation bits in the channel data corresponding to all channels are equal to the preset values, the data of the pulse width modulation bits cannot continue to increase, and the data of the current bits in the channel data corresponding to multiple channels in the backlight driver can be updated according to the change in brightness demand, thereby ensuring real-time adjustment of brightness demand. Compared with the traditional method of stopping output to reset the current, this avoids transmission delays and is beneficial to improving backlight adjustment efficiency.

[0097] In this embodiment, by judging whether the change in brightness requirement is within a preset range and whether the data of the pulse width modulation bit is less than a preset value, different adjustment methods are adopted under different conditions, which is beneficial to improving the precision and accuracy of brightness adjustment. At the same time, real-time adjustment of brightness requirement is ensured, which is beneficial to improving backlight adjustment efficiency.

[0098] To explain the backlight control method and effect in this solution in detail, a most detailed embodiment is described below:

[0099] The backlight control method can be applied to the backlight control method of various LCD backlight modules, and the application scenario of HUD / AR-HUD is used as an example to illustrate. The channel data in the embodiment of the present application adopts a new transmission mixing mode, that is, the current bit and pulse width modulation bit in each channel data are mixed, and the current bit is used to indicate the driving current corresponding to the output of the backlight driver, and the pulse width modulation bit is used to indicate the pulse width modulation signal corresponding to the output of the backlight driver. As shown in Figure 7, a schematic diagram of the transmission mode of channel data in another embodiment. The controller sets the channel data according to the data in the initial setting area, and when the backlight adjustment is required, the channel data can be updated in real time in the change setting area. With this transmission mixing mode, it is possible to achieve independent control and real-time change of the driving current and pulse width modulation signal output by each channel, increase the controllable brightness range of each backlight partition, reduce the power consumption, and facilitate the differentiated brightness adjustment of each backlight partition.

[0100] Specifically, the backlight module includes a backlight driver and a plurality of backlight partitions, and the backlight driver can be connected to the plurality of backlight partitions to output a driving current and a pulse width modulation signal to the connected backlight partitions. Each backlight partition includes a plurality of light-emitting diodes, and each light-emitting diode is connected to at least one channel of the backlight driver. The controller is connected to the backlight module, and is used to obtain the brightness requirements of the plurality of backlight partitions in the backlight module, and obtain the number of channels corresponding to the plurality of light-emitting diodes in each backlight partition from the initial setting area, and determine the channel data corresponding to the plurality of channels in the backlight driver according to the brightness requirements of the plurality of backlight partitions and the number of channels corresponding to the plurality of light-emitting diodes in each backlight partition, and send the channel data to the backlight driver to instruct the backlight driver to output the driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output the pulse width modulation signal according to the data of the pulse width modulation bit in the channel data.

[0101] Among them, according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition, the channel data corresponding to each of the multiple channels in the backlight driver are determined, including: for any light-emitting diode, according to the brightness requirement of the backlight partition where the current light-emitting diode is located and the number of channels corresponding to the current light-emitting diode, the brightness requirements of each channel connected to the current light-emitting diode are determined; a preset mapping relationship is obtained, and the preset mapping relationship is used to characterize the correspondence between the current gear, the pulse width modulation gear and the brightness requirement; for any channel in the backlight driver, the current limit value of the current channel is obtained from the preset data area, and the brightness peak value is determined according to the current limit value; when the brightness requirement of the current channel does not exceed the brightness peak value, the preset mapping relationship is queried to determine the multiple current gears corresponding to the brightness requirement of the current channel, and the pulse width modulation gear corresponding to each current gear; a target current gear is determined among the multiple current gears, and according to the target current gear, the current bit data in the channel data corresponding to the current channel is determined, and according to the pulse width modulation gear corresponding to the target current gear, the pulse width modulation bit data in the channel data corresponding to the current channel is determined.

[0102] When the backlight partition needs to be brightly adjusted, the controller obtains the brightness requirement change of each of the multiple backlight partitions, updates the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirement change, and sends the updated channel data to the backlight driver to instruct the backlight driver to output the driving current according to the current bit data in the updated channel data, and to instruct the backlight driver to output the pulse width modulation signal according to the pulse width modulation bit data in the updated channel data.

[0103] Wherein, updating the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness demand change includes: when the brightness demand change is within a preset range and the data of the pulse width modulation bit in the channel data corresponding to any channel is less than a preset value, updating the data of the pulse width modulation bit in the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness demand change; when the brightness demand change is within a preset range and the data of the pulse width modulation bit in the channel data corresponding to all channels are equal to the preset value, updating the data of the current bit in the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness demand change.

[0104] The above-mentioned backlight control method obtains the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition, and determines the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements and the number of channels. The channel data includes a current bit for adjusting the driving current and a pulse width modulation bit for adjusting the pulse width modulation signal. The backlight driver can synchronously set the driving current and the pulse width modulation signal according to the channel data, which is beneficial to the real-time adjustment of the driving current and the pulse width modulation signal, avoiding the transmission delay caused by resetting the current, thereby improving the backlight control efficiency; at the same time, the current bit is added to the channel data, which increases the controllable brightness range of the backlight, which is beneficial to improving the backlight control efficiency in scenarios with a large brightness adjustment range.

[0105] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed 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 part of the steps or stages in other steps.

[0106] Based on the same inventive concept, the embodiment of the present application also provides a backlight control device for implementing the backlight control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more backlight control device embodiments provided below can refer to the limitations on the backlight control method above, and will not be repeated here.

[0107] In an exemplary embodiment, as shown in FIG8 , a backlight control device 800 is provided, comprising: an acquisition module 820, a determination module 840 and an output module 860, wherein:

[0108] The acquisition module 820 is used to acquire the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; each light-emitting diode is connected to at least one channel of the backlight driver; and the backlight driver is connected to the multiple backlight partitions;

[0109] A determination module 840, configured to determine channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition;

[0110] The output module 860 is used to send the channel data to the backlight driver to instruct the backlight driver to output the driving current according to the current bit data in the channel data, and to instruct the backlight driver to output the pulse width modulation signal according to the pulse width modulation bit data in the channel data.

[0111] The above-mentioned backlight control device obtains the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition, and determines the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements and the number of channels. The channel data includes a current bit for adjusting the driving current and a pulse width modulation bit for adjusting the pulse width modulation signal. The backlight driver can synchronously set the driving current and the pulse width modulation signal according to the channel data, which is beneficial to the real-time adjustment of the driving current and the pulse width modulation signal, avoiding the transmission delay caused by resetting the current, thereby improving the backlight control efficiency; at the same time, the current bit is added to the channel data, which increases the controllable brightness range of the backlight, which is beneficial to improving the backlight control efficiency in scenarios with a large brightness adjustment range.

[0112] Each module in the above backlight control device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module.

[0113] In an exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be shown in FIG9. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, the memory, and the input / output interface are connected via a system bus, and the communication interface, the display unit, and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner may be implemented through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a backlight control method is implemented. The display unit of the computer device is used to form a visually visible picture, which may be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0114] Those skilled in the art will understand that the structure shown in FIG. 9 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0115] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0116] 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 steps in the above-mentioned method embodiments are implemented.

[0117] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0118] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0119] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed 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 the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can 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 can include random access memory (RAM) or external cache memory, etc. As an 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 each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0120] The technical features of the above embodiments may 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 application.

[0121] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A backlight control method, characterized in that: The method comprises: Acquire the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; each light-emitting diode is connected to at least one channel of a backlight driver; the backlight driver is connected to the multiple backlight partitions; Determining channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; The channel data is sent to the backlight driver to instruct the backlight driver to output a driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the channel data.

2. The method according to claim 1, characterized in that The determining, according to the brightness requirements of the plurality of backlight partitions and the number of channels corresponding to the plurality of light-emitting diodes in each backlight partition, the channel data corresponding to the plurality of channels in the backlight driver comprises: For any light-emitting diode, according to the brightness requirement of the backlight partition where the current light-emitting diode is located and the number of channels corresponding to the current light-emitting diode, determine the brightness requirements of each channel connected to the current light-emitting diode; According to the brightness requirements of the multiple channels in the backlight driver, channel data corresponding to the multiple channels in the backlight driver are determined.

3. The method according to claim 2, characterized in that The determining, according to the brightness requirements of the multiple channels in the backlight driver, the channel data corresponding to the multiple channels in the backlight driver respectively comprises: Acquire a preset mapping relationship, where the preset mapping relationship is used to characterize the corresponding relationship between the current gear, the pulse width modulation gear and the brightness requirement; For any channel in the backlight driver, query the preset mapping relationship to determine the multiple current gears corresponding to the brightness requirement of the current channel, and the pulse width modulation gear corresponding to each current gear; determine the target current gear among the multiple current gears, and determine the current bit data in the channel data corresponding to the current channel according to the target current gear, and determine the pulse width modulation bit data in the channel data corresponding to the current channel according to the pulse width modulation gear corresponding to the target current gear.

4. The method according to claim 3, characterized in that The querying of the preset mapping relationship to determine a plurality of current gears corresponding to the brightness requirement of the current channel and a pulse width modulation gear corresponding to each current gear includes: Obtaining a current limit value of a current channel from a preset data area, and determining a brightness peak value according to the current limit value; When the brightness requirement of the current channel does not exceed the brightness peak, the preset mapping relationship is queried to determine a plurality of current gears corresponding to the brightness requirement of the current channel and a pulse width modulation gear corresponding to each current gear.

5. The method according to claim 1, characterized in that: The method further comprises: Obtain the brightness requirement change of each of the multiple backlight partitions; Update channel data corresponding to each of the plurality of channels in the backlight driver according to the brightness requirement change; The updated channel data is sent to the backlight driver to instruct the backlight driver to output a driving current according to the data of the current bit in the updated channel data, and to instruct the backlight driver to output a pulse width modulation signal according to the data of the pulse width modulation bit in the updated channel data.

6. The method according to claim 5, characterized in that The updating of channel data corresponding to each of the plurality of channels in the backlight driver according to the brightness requirement change comprises: When the brightness requirement change is within a preset range and the data of the pulse width modulation bit in the channel data corresponding to any channel is less than a preset value, updating the data of the pulse width modulation bit in the channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirement change; When the brightness requirement change is within a preset range and the pulse width modulation bit data in the channel data corresponding to all channels are equal to preset values, the current bit data in the channel data corresponding to each of the multiple channels in the backlight driver are updated according to the brightness requirement change.

7. A backlight control device, characterized in that: The device comprises: An acquisition module is used to acquire the brightness requirements of each of the multiple backlight partitions in the backlight module and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; each light-emitting diode is connected to at least one channel of a backlight driver; and the backlight driver is connected to the multiple backlight partitions; A determination module, configured to determine channel data corresponding to each of the multiple channels in the backlight driver according to the brightness requirements of each of the multiple backlight partitions and the number of channels corresponding to each of the multiple light-emitting diodes in each backlight partition; The output module is used to send the channel data to the backlight driver to instruct the backlight driver to output the driving current according to the data of the current bit in the channel data, and to instruct the backlight driver to output the pulse width modulation signal according to the data of the pulse width modulation bit in the channel data.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. 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 any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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