Vehicle-mounted display screen dual-mode dimming control method, device and equipment and storage medium

Abstract

The invention provides a vehicle-mounted display screen dual-mode dimming control method, device and equipment and a storage medium, and relates to the technical field of mode switching, and the method comprises the steps: collecting ambient light intensity, time period information, user operation behavior data and a display screen working state in real time; determining a basic color temperature interval based on the ambient light intensity and the time period information, and determining a color temperature preference offset based on the user operation behavior data; selecting a dimming mode based on the working state of the display screen; fusing the basic color temperature interval and the color temperature preference offset to generate a target spectrum output instruction; and executing the target spectrum output instruction based on the dimming mode to complete dual-mode dimming control of the vehicle-mounted display screen. In the mode, through switching among different dimming modes, the fatigue degree of eyes of a user is reduced, and the driving safety of the user is improved.

Description

Technical Field

[0001] The present invention relates to the field of mode switching technology, and in particular to a method, device, equipment and storage medium for dual-mode dimming control of a vehicle-mounted display screen. Background Art

[0002] With the continuous development of society, there are more and more cars in cities. During vehicle use, the on-board display screen can assist the driver in driving the vehicle safely. At this time, the driver's comfort in viewing the display screen is particularly important.

[0003] In current vehicle displays, the driver's gaze frequently switches between the display and the road ahead. In this situation, traditional PWM dimming in low-brightness mode, due to the low carrier frequency, can produce a noticeable flicker phenomenon. According to the IEEE 1789-2015 standard, when the flicker frequency is less than 90Hz, retinal ganglion cells are continuously stimulated, leading to visual fatigue and headaches, posing a safety hazard to driving. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a dual-mode dimming control method, device, equipment and storage medium for a vehicle-mounted display screen, which can reduce the user's eye fatigue and improve the user's driving safety by switching between different dimming modes.

[0005] In a first aspect, an embodiment of the present invention provides a dual-mode dimming control method for an in-vehicle display screen, the method comprising: real-time collection of ambient light intensity, time period information, user operation behavior data, and display screen operating status; determining a basic color temperature range based on the ambient light intensity and time period information, and determining a color temperature preference offset based on the user operation behavior data; selecting a dimming mode based on the display screen operating status; fusing the basic color temperature range and the color temperature preference offset to generate a target spectrum output instruction; and executing the target spectrum output instruction based on the dimming mode to complete the dual-mode dimming control of the in-vehicle display screen.

[0006] In a preferred embodiment of the present invention, the above-mentioned determination of the basic color temperature interval based on the ambient light intensity and the time period information includes: when the ambient light intensity is greater than a preset first intensity and the time period information indicates that it is in the daytime period, setting the basic color temperature interval to the first interval; when the ambient light intensity is less than a preset second intensity and the time period information indicates that it is in the nighttime period, setting the basic color temperature interval to the second interval.

[0007] In a preferred embodiment of the present invention, the above-mentioned determination of the color temperature preference offset based on user operation behavior data includes: collecting statistics on the user's historical adjustment records in the same time period based on the user operation behavior data; determining the difference between the historical adjustment average value in the historical adjustment record and the system recommended value; when the difference is greater than a preset difference threshold, using the difference as the color temperature preference offset.

[0008] In a preferred embodiment of the present invention, the above-mentioned selection of the dimming mode based on the working state of the display screen includes: determining the brightness of the display screen based on the working state of the display screen; when the brightness of the display screen is greater than or equal to a preset brightness threshold and the refresh rate is greater than 120Hz, selecting the PWM dimming mode; when the brightness of the display screen is less than the brightness threshold or static content is displayed, selecting the DC dimming mode.

[0009] In a preferred embodiment of the present invention, the above-mentioned execution of the PWM dimming mode includes: selecting a carrier frequency of 20kHz or 40kHz based on the target brightness value of the display screen; achieving brightness control by adjusting the duty cycle; and executing the DC dimming mode includes: setting the output current value of the constant current source; and monitoring the current ripple in real time and compensating it.

[0010] In a preferred embodiment of the present invention, the method further includes: when the ambient temperature exceeds a preset temperature threshold, forcibly switching to a DC dimming mode.

[0011] In a preferred embodiment of the present invention, the above-mentioned fusion of the basic color temperature range and the color temperature preference offset generates a target spectrum output instruction, including: adding the middle value of the basic color temperature range and the color temperature preference offset to obtain a target color temperature value; determining the driving current ratio of each color channel based on the target color temperature value; and using the driving current ratio as the target spectrum output instruction.

[0012] In a second aspect, an embodiment of the present invention also provides a dual-mode dimming control device for a vehicle-mounted display screen, including: a data acquisition module for real-time acquisition of ambient light intensity, time period information, user operation behavior data and display screen working status; a determination module for determining a basic color temperature range based on ambient light intensity and time period information, and determining a color temperature preference offset based on user operation behavior data; a dimming mode selection module for selecting a dimming mode based on the display screen working status; a target spectrum output instruction generation module for fusing the basic color temperature range and the color temperature preference offset to generate a target spectrum output instruction; a dimming mode execution module for executing the target spectrum output instruction based on the dimming mode to complete the dual-mode dimming control of the vehicle-mounted display screen.

[0013] In a third aspect, an embodiment of the present invention further provides an electronic device comprising a processor and a memory, wherein the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the dual-mode dimming control method for a vehicle display screen according to the first aspect above.

[0014] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the dual-mode dimming control method for the vehicle display screen of the first aspect mentioned above.

[0015] The embodiments of the present invention bring the following beneficial effects: Embodiments of the present invention provide a method, apparatus, device, and storage medium for dual-mode dimming control of an in-vehicle display screen. These methods collect ambient light intensity, time period information, user operation behavior data, and the display screen's operating status in real time. A base color temperature range is determined based on the ambient light intensity and time period information, a color temperature preference offset is determined based on the user operation behavior data, a dimming mode is selected based on the display screen's operating status, and a target spectrum output instruction is generated by combining the base color temperature range and the color temperature preference offset. This target spectrum output instruction is then executed based on the dimming mode to complete dual-mode dimming control of the in-vehicle display screen. This method reduces user eye fatigue and improves driving safety by switching between different dimming modes.

[0016] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by practicing the above-mentioned technology of the present disclosure.

[0017] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A flow chart of a dual-mode dimming control method for a vehicle display screen provided by an embodiment of the present invention; Figure 2 A flowchart of another vehicle display dual-mode dimming control method provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a dual-mode dimming control device for a vehicle display screen provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] With the continuous development of society, there are more and more cars in cities. During vehicle use, the on-board display screen can assist the driver in driving the vehicle safely. At this time, the driver's comfort in viewing the display screen is particularly important.

[0022] In current vehicle displays, the driver's gaze frequently switches between the display and the road ahead. In this situation, traditional PWM dimming in low-brightness mode, due to the low carrier frequency, can produce a noticeable flicker phenomenon. According to the IEEE 1789-2015 standard, when the flicker frequency is less than 90Hz, retinal ganglion cells are continuously stimulated, leading to visual fatigue and headaches, posing a safety hazard to driving.

[0023] Based on this, embodiments of the present invention provide a dual-mode dimming control method, device, equipment, and storage medium for an in-vehicle display screen. This method, through real-time collection of ambient light intensity, time period information, user operation behavior data, and the display screen's operating status, determines a base color temperature range based on the ambient light intensity and time period information, determines a color temperature preference offset based on the user operation behavior data, selects a dimming mode based on the display screen's operating status, fuses the base color temperature range and the color temperature preference offset to generate a target spectrum output instruction, and executes the target spectrum output instruction based on the dimming mode to complete dual-mode dimming control of the in-vehicle display screen. This method reduces user eye fatigue and improves driving safety by switching between different dimming modes.

[0024] To facilitate understanding of this embodiment, a dual-mode dimming control method for a vehicle display screen disclosed in an embodiment of the present invention is first introduced in detail.

[0025] Example 1 The embodiment of the present invention provides a dual-mode dimming control method for a vehicle-mounted display screen. Figure 1 This is a flow chart of a dual-mode dimming control method for a vehicle display screen provided by an embodiment of the present invention. Figure 1 As shown, the dual-mode dimming control method for a vehicle display screen may include the following steps: Step S101 , collecting ambient light intensity, time period information, user operation behavior data and display screen working status in real time.

[0026] Among them, user operation behavior data may include: user driving time, user historical adjustment records, user eye fatigue indicators, etc.

[0027] The ambient light intensity can be collected by an ambient light sensor.

[0028] The display screen working status may include the display screen brightness.

[0029] Step S102 : determining a basic color temperature range based on ambient light intensity and time period information, and determining a color temperature preference offset based on user operation behavior data.

[0030] Among them, when the ambient light intensity is greater than 1000 lux and the time period information corresponds to 6:00-18:00, the basic color temperature range is set to 5800-6500K; when the ambient light intensity is less than 50 lux or the time period information corresponds to 22:00-6:00, the basic color temperature range is set to 3200-4000K.

[0031] Step S103: Select a dimming mode based on the working state of the display screen.

[0032] Among them, the current display brightness can be determined according to the working status of the display. When the display brightness is ≥30% and the refresh rate is ≥120Hz, the PWM mode is enabled; when the display brightness is <30% or a static image is displayed, the DC mode is forcibly enabled.

[0033] Step S104 , fusing the basic color temperature range and the color temperature preference offset to generate a target spectrum output instruction.

[0034] Among them, the median of the basic color temperature range can be calculated; then the color temperature preference offset is superimposed to generate the final target color temperature, which is the adjustment target.

[0035] Step S105 , executing the target spectrum output instruction based on the dimming mode to complete the dual-mode dimming control of the vehicle display screen.

[0036] The dual-mode dimming control method for an in-vehicle display screen provided by an embodiment of the present invention collects ambient light intensity, time period information, user operation behavior data, and the display screen's operating status in real time. It determines a base color temperature range based on the ambient light intensity and time period information, determines a color temperature preference offset based on the user operation behavior data, selects a dimming mode based on the display screen's operating status, combines the base color temperature range and the color temperature preference offset to generate a target spectrum output instruction, and executes the target spectrum output instruction based on the dimming mode to complete dual-mode dimming control of the in-vehicle display screen. This method reduces user eye fatigue and improves driving safety by switching between different dimming modes.

[0037] Example 2 An embodiment of the present invention also provides another dual-mode dimming control method for a vehicle display screen; this method is implemented on the basis of the method in the above embodiment.

[0038] Figure 2 A flowchart of another vehicle display dual-mode dimming control method provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the dual-mode dimming control method for a vehicle display screen may include the following steps: Step S201 , collecting ambient light intensity, time period information, user operation behavior data and display screen working status in real time.

[0039] Step S202 : determining a basic color temperature range based on ambient light intensity and time period information, and determining a color temperature preference offset based on user operation behavior data.

[0040] Specifically, determining the basic color temperature interval based on the ambient light intensity and time period information may include: when the ambient light intensity is greater than a preset first intensity and the time period information indicates that it is in the daytime period, setting the basic color temperature interval to the first interval; when the ambient light intensity is less than a preset second intensity and the time period information indicates that it is in the nighttime period, setting the basic color temperature interval to the second interval.

[0041] Among them, the ambient light intensity can be used to determine whether it is day or night. When the ambient light intensity is ≥200 lux and the time period information corresponds to 6:00-18:00, it is determined to be the daytime period; when the ambient light intensity is <50 lux or the time period information is a time other than 6:00-18:00, it is determined to be the nighttime period.

[0042] Among them, when it is in the daytime period, the output is 6200±300K range, that is, the first range; when it is in the nighttime period, the output is 3800±200K range, that is, the second range.

[0043] Specifically, determining the color temperature preference offset based on user operation behavior data may include: counting the user's historical adjustment records in the same time period based on the user operation behavior data; determining the difference between the historical adjustment average value in the historical adjustment record and the system recommended value; when the difference is greater than a pre-set difference threshold, using the difference as the color temperature preference offset.

[0044] The calculation of the historical adjustment average can be expressed by the following formula: μ=(5×D0+3×D1+2×D2) / 10 Among them, μ represents the historical adjusted average, D0 represents the current day, D1 represents the previous day, and D2 represents the previous two days.

[0045] The color temperature preference offset calculation can be expressed by the following formula:

[0046] Among them, ΔT represents the color temperature preference offset, μ represents the historical adjustment average, and T std Indicates ISO 16703 standard value.

[0047] Furthermore, the user's eye fatigue can be taken into consideration at night. Specifically, -300K physiological rhythm compensation can be added during the night period from 22:00 to 6:00 to improve the user's eye comfort.

[0048] Step S203: determining the brightness of the display screen based on the working state of the display screen.

[0049] Step S204 : When the brightness of the display screen is greater than or equal to a preset brightness threshold and the refresh rate is greater than 120 Hz, a PWM dimming mode is selected.

[0050] Executing the PWM dimming mode includes: selecting a carrier frequency of 20kHz or 40kHz based on the target brightness value of the display; and achieving brightness control by adjusting the duty cycle.

[0051] Step S205 : When the display screen brightness is less than the brightness threshold or static content is displayed, a DC dimming mode is selected.

[0052] The implementation of the DC dimming mode includes: setting the output current value of the constant current source; and monitoring the current ripple in real time and performing compensation.

[0053] When the ambient temperature exceeds a preset temperature threshold, the system is forced to switch to the DC dimming mode.

[0054] Step S206 , fusing the basic color temperature range and the color temperature preference offset to generate a target spectrum output instruction.

[0055] Specifically, fusing the basic color temperature interval and the color temperature preference offset to generate a target spectrum output instruction may include: adding the middle value of the basic color temperature interval and the color temperature preference offset to obtain a target color temperature value; determining the driving current ratio of each color channel based on the target color temperature value; and using the driving current ratio as the target spectrum output instruction.

[0056] As an implementation method, the basic color temperature range [T min , T max ] to perform benchmark calculations to obtain T base : ; Then use the following formula to calculate T base The compensation synthesis process is performed with the color temperature preference offset to obtain T target : ; where ΔT circ: 22-24 hours = -300K, 5-7 hours = +200K; finally, T target Perform spectrum matrix conversion to obtain the target spectrum output instruction: .

[0057] Step S207 : executing the target spectrum output instruction based on the dimming mode to complete the dual-mode dimming control of the vehicle display screen.

[0058] Among them, the PWM dimming mode command is driven at high frequency. When Lcur ≥ 50%, a 20kHz square wave is generated. When Lcur < 50%, a 40kHz square wave is generated. The square wave signal is subjected to dead-zone control: the rising edge delay is set to 150ns, the falling edge is set to 100ns in advance, and the signals are output to the MOSFET gate driver for control.

[0059] Example 3 Corresponding to the above method embodiment, the embodiment of the present invention provides a dual-mode dimming control device for a vehicle-mounted display screen, Figure 3 A schematic diagram of the structure of a dual-mode dimming control device for a vehicle display screen provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the vehicle-mounted display dual-mode dimming control device may include: Data collection module 301, used to collect ambient light intensity, time period information, user operation behavior data and display screen working status in real time; Determination module 302, for determining a basic color temperature range based on ambient light intensity and time period information, and determining a color temperature preference offset based on user operation behavior data; A dimming mode selection module 303 is configured to select a dimming mode based on the operating state of the display screen; The target spectrum output instruction generating module 304 is configured to fuse the basic color temperature range and the color temperature preference offset to generate a target spectrum output instruction; The dimming mode execution module 305 is used to execute the target spectrum output instruction based on the dimming mode to complete the dual-mode dimming control of the vehicle display screen.

[0060] The dual-mode dimming control device for an in-vehicle display screen provided by an embodiment of the present invention collects ambient light intensity, time period information, user operation behavior data, and the display screen's operating status in real time. It determines a base color temperature range based on the ambient light intensity and time period information, determines a color temperature preference offset based on the user operation behavior data, selects a dimming mode based on the display screen's operating status, combines the base color temperature range and the color temperature preference offset to generate a target spectrum output instruction, and executes the target spectrum output instruction based on the dimming mode to complete dual-mode dimming control of the in-vehicle display screen. This method reduces user eye fatigue and improves driving safety by switching between different dimming modes.

[0061] In some embodiments, the determination module is further used to set the basic color temperature interval to the first interval when the ambient light intensity is greater than a preset first intensity and the time period information indicates that it is in the daytime period; and to set the basic color temperature interval to the second interval when the ambient light intensity is less than a preset second intensity and the time period information indicates that it is in the nighttime period.

[0062] In some embodiments, the determination module is also used to count the user's historical adjustment records in the same time period based on the user operation behavior data; determine the difference between the historical adjustment average value in the historical adjustment record and the system recommended value; when the difference is greater than a pre-set difference threshold, use the difference as the color temperature preference offset.

[0063] In some embodiments, the dimming mode selection module is further used to determine the brightness of the display screen based on the working status of the display screen; when the brightness of the display screen is greater than or equal to a preset brightness threshold and the refresh rate is greater than 120Hz, the PWM dimming mode is selected; when the brightness of the display screen is less than the brightness threshold or static content is displayed, the DC dimming mode is selected.

[0064] In some embodiments, executing the PWM dimming mode includes: selecting a carrier frequency of 20kHz or 40kHz based on the target brightness value of the display screen; achieving brightness control by adjusting the duty cycle; executing the DC dimming mode includes: setting the output current value of the constant current source; monitoring the current ripple in real time and compensating it.

[0065] In some embodiments, when the ambient temperature exceeds a preset temperature threshold, the mode is forcibly switched to the DC dimming mode.

[0066] In some embodiments, the target spectrum output instruction generation module is further used to add the middle value of the basic color temperature range and the color temperature preference offset to obtain the target color temperature value; determine the driving current ratio of each color channel based on the target color temperature value; and use the driving current ratio as the target spectrum output instruction.

[0067] The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those in the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference can be made to the corresponding content in the aforementioned method embodiment.

[0068] Example 4 The embodiment of the present invention also provides an electronic device for executing the above-mentioned vehicle-mounted display screen dual-mode dimming control method; see Figure 4 A structural schematic diagram of an electronic device is shown, which includes a memory 400 and a processor 401, wherein the memory 400 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor 401 to implement the above-mentioned dual-mode dimming control method for the vehicle display screen.

[0069] Furthermore, Figure 4 The electronic device shown further includes a bus 402 and a communication interface 403 , and the processor 401 , the communication interface 403 and the memory 400 are connected via the bus 402 .

[0070] The memory 400 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is achieved through at least one communication interface 403 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 402 may be an ISA bus, a PCI bus, or an EISA bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0071] The processor 401 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in the processor 401 or by software instructions. The above processor 401 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present invention can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in memory 400, and processor 401 reads the information in memory 400 and, in conjunction with its hardware, completes the steps of the method of the aforementioned embodiment.

[0072] An embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the above-mentioned dual-mode dimming control method for the vehicle display screen. The specific implementation can be found in the method embodiment and will not be repeated here.

[0073] The computer program product for the dual-mode dimming control method for a vehicle display provided in an embodiment of the present invention includes a computer-readable storage medium storing a non-volatile program code executable by a processor. The instructions included in the program code can be used to execute the method described in the previous method embodiment. For specific implementation, please refer to the method embodiment and will not be repeated here.

[0074] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0075] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0076] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0077] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0078] If the functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include various media capable of storing program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0079] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A dual-mode dimming control method for a vehicle-mounted display screen, characterized in that: The method comprises: Real-time collection of ambient light intensity, time period information, user operation behavior data and display screen working status; Determine a basic color temperature range based on the ambient light intensity and the time period information, and determine a color temperature preference offset based on the user operation behavior data; Selecting a dimming mode based on the operating state of the display screen; Fusion of the basic color temperature range and the color temperature preference offset to generate a target spectrum output instruction; The target spectrum output instruction is executed based on the dimming mode to complete the dual-mode dimming control of the vehicle display screen.

2. The method according to claim 1, characterized in that The determining of the basic color temperature range based on the ambient light intensity and the time period information includes: When the ambient light intensity is greater than a preset first intensity and the time period information indicates that it is during the daytime, setting the basic color temperature interval to the first interval; When the ambient light intensity is less than a preset second intensity and the time period information indicates that it is at night, the basic color temperature interval is set to the second interval.

3. The method according to claim 1, characterized in that The determining of the color temperature preference offset based on the user operation behavior data includes: Counting historical adjustment records of users in the same time period based on the user operation behavior data; Determine the difference between the historical adjustment average value in the historical adjustment record and the system recommended value; When the difference is greater than a preset difference threshold, the difference is used as the color temperature preference offset.

4. The method according to claim 1, wherein The selecting a dimming mode based on the working state of the display screen includes: determining the brightness of the display screen based on the operating state of the display screen; When the brightness of the display screen is greater than or equal to a preset brightness threshold and the refresh rate is greater than 120 Hz, the PWM dimming mode is selected; When the display screen brightness is less than the brightness threshold or static content is displayed, the DC dimming mode is selected.

5. The method according to claim 4, characterized in that The implementation of the PWM dimming mode includes: selecting a carrier frequency of 20kHz or 40kHz based on the target brightness value of the display screen; and achieving brightness control by adjusting the duty cycle; The implementation of the DC dimming mode includes: setting the output current value of the constant current source; and monitoring the current ripple in real time and performing compensation.

6. The method according to claim 5, characterized in that The method further comprises: When the ambient temperature exceeds the preset temperature threshold, it is forced to switch to DC dimming mode.

7. The method according to claim 1, characterized in that The step of fusing the basic color temperature range with the color temperature preference offset to generate a target spectrum output instruction includes: Adding the middle value of the basic color temperature range to the color temperature preference offset to obtain a target color temperature value; Determining a driving current ratio for each color channel based on the target color temperature value; The driving current ratio is used as a target spectrum output instruction.

8. A dual-mode dimming control device for a vehicle-mounted display screen, characterized in that: The device comprises: Data acquisition module, used to collect ambient light intensity, time period information, user operation behavior data and display screen working status in real time; a determination module, configured to determine a basic color temperature interval based on the ambient light intensity and the time period information, and determine a color temperature preference offset based on the user operation behavior data; A dimming mode selection module, configured to select a dimming mode based on the operating state of the display screen; a target spectrum output instruction generating module, configured to fuse the basic color temperature range and the color temperature preference offset to generate a target spectrum output instruction; A dimming mode execution module is used to execute the target spectrum output instruction based on the dimming mode to complete the dual-mode dimming control of the vehicle display screen.

9. An electronic device, characterized in that: It includes a processor and a memory, the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the dual-mode dimming control method for a vehicle display screen according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are called and executed by the processor, the computer-executable instructions prompt the processor to implement the dual-mode dimming control method for a vehicle display screen according to any one of claims 1 to 7.

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