A vehicle-mounted reading lamp system, a control method of a vehicle-mounted reading lamp, and a vehicle

Abstract

The application relates to the technical field of lighting, and discloses a vehicle-mounted reading lamp system, a control method of a vehicle-mounted reading lamp, and a vehicle. The method comprises the following steps: determining a target scene mode of a first trigger signal or a second trigger signal; determining target control parameters corresponding to the target scene mode according to control parameters corresponding to each preset scene mode; and generating a control signal according to the target control parameters and sending the control signal to corresponding target independent drive circuits to adjust reading lamp devices corresponding to the target independent drive circuits. Through the above method, intelligent matching between a lighting function and light demand of various scene modes can be realized, and convenience and comfort are greatly improved. Meanwhile, the method also supports automatic triggering of scene mode switching according to a preset time or a driver fatigue signal, improves the alertness of a driver, and enhances driving safety.

Description

Technical Field

[0001] This application relates to the field of lighting technology, and in particular to a vehicle-mounted reading light system, a control method for the vehicle-mounted reading light, and a vehicle. Background Technology

[0002] Most existing in-vehicle reading lights are single-function, offering only simple on / off switches and limited brightness adjustments, failing to meet the diverse lighting needs of users during various in-vehicle activities. Different in-vehicle activities have different requirements for light color temperature, illuminance, and color rendering index. Therefore, there is an urgent need for a technical solution that can intelligently and personalized adjust in-vehicle reading lights for different in-vehicle activities. Summary of the Invention

[0003] In view of this, the present application provides a vehicle reading light system, a vehicle reading light control method, and a vehicle, which can effectively solve the technical problem that existing vehicle reading lights cannot meet the lighting needs of users for diverse in-vehicle activities.

[0004] In a first aspect, embodiments of this application provide a vehicle-mounted reading light system, the system comprising: The light source module includes multiple independently controllable reading light devices; The driving power module includes multiple independent driving circuits, each of which controls one of the reading light devices; The interaction module is configured with multiple interaction units, each of which corresponds to a preset scene mode, and is used to respond to a trigger operation for any one of the interaction units and generate a first trigger signal. The detection module is used to generate a second trigger signal when a preset time is reached or when a driver fatigue signal is detected. The control module is used to determine the target scene mode of the first trigger signal or the second trigger signal; determine the target control parameters corresponding to the target scene mode according to the control parameters corresponding to each preset scene mode; generate a control signal according to the target control parameters and send it to the corresponding target independent driving circuit to adjust the reading light device corresponding to the target independent driving circuit.

[0005] Secondly, embodiments of this application provide a method for controlling a vehicle-mounted reading light, the method comprising: Determine the target scene mode of the first trigger signal or the second trigger signal; Based on the control parameters corresponding to each preset scene mode, determine the target control parameters corresponding to the target scene mode; Based on the target control parameters, a control signal is generated and sent to the corresponding target independent drive circuit to adjust the reading light device corresponding to the target independent drive circuit.

[0006] Thirdly, embodiments of this application provide a vehicle that includes the vehicle-mounted reading light system described in the above embodiments.

[0007] The embodiments of this application have the following beneficial effects: Through a three-level collaborative control system of scene mode, detection trigger, and parameterized response, intelligent matching between lighting functions and the light requirements of various scene modes is achieved, greatly improving convenience and comfort. Simultaneously, since the scene modes corresponding to each interactive unit are pre-built into the interactive module, the response speed to light requirements is significantly improved. Furthermore, in addition to the traditional scene mode switching via the interactive module, this application also supports automatic scene mode switching based on preset times or driver fatigue signals, enhancing driver alertness and improving driving safety. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This paper shows a schematic diagram of a first-order frame of an in-vehicle reading light system according to an embodiment of this application; Figure 2 This paper illustrates a schematic diagram of an interface of an interactive module according to an embodiment of this application. Figure 3 A second schematic diagram of the vehicle-mounted reading light system according to an embodiment of this application is shown; Figure 4 A flowchart illustrating the control method for a vehicle-mounted reading light according to an embodiment of this application is shown. Detailed Implementation

[0010] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0011] The components of the embodiments of this application described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0012] In the following text, the terms "comprising," "having," and their cognates, which may be used in various embodiments of this application, are intended only to indicate a particular feature, number, step, operation, element, component, or combination thereof, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, or adding the possibility of one or more combinations thereof. Furthermore, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0013] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this application pertain. Terms (such as those defined in commonly used dictionaries) shall be interpreted as having the same meaning as in their contextual meaning in the relevant technical field and shall not be construed as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this application.

[0014] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0015] Most existing in-vehicle reading lights are single-function, offering only simple on / off switches and limited brightness adjustments, failing to meet the diverse lighting needs of users during various in-vehicle activities. Different in-vehicle activities have different requirements for light color temperature, illuminance, and color rendering index. Therefore, there is an urgent need for a technical solution that can intelligently and personalized adjust in-vehicle reading lights for different in-vehicle activities.

[0016] To address the aforementioned technical issues, this application provides an in-vehicle reading light system, a control method for the in-vehicle reading light, and a vehicle. This application achieves intelligent matching between lighting functions and the light requirements of various scene modes through a three-level collaborative control system of scene mode, detection trigger, and parameterized response, greatly improving convenience and comfort.

[0017] Meanwhile, since the scene modes corresponding to each interactive unit are pre-built into the control module, the response speed to lighting requirements is greatly improved. In addition to the traditional scene mode switching via interactive modules, this application also supports automatic scene mode switching based on preset times or driver fatigue signals, enhancing driver alertness and improving driving safety.

[0018] The following describes the vehicle-mounted reading light system using some specific embodiments.

[0019] Figure 1A first schematic diagram of an in-vehicle reading light system according to an embodiment of this application is shown. Exemplarily, the in-vehicle reading light system includes: a light source module, a drive power supply module, an interaction module, a detection module, and a control module.

[0020] The LED light source module includes a reading light device composed of at least four independently adjustable LED devices (channel 1, channel 2, channel 3, and channel 4) for white, red, green, and blue light, facing the reading lighting area. Optionally, the reading light devices may be one or more combinations of white light devices, red light devices, yellow light devices, and blue light devices.

[0021] The driving power module includes an independent driving circuit that receives vehicle power input and has multi-channel constant current output and PWM dimming capability. Each independent driving circuit can adjust the current amplitude or duty cycle of the corresponding LED device (i.e., reading light device) to achieve millisecond-level coordinated control of color temperature, brightness, and spectral power distribution.

[0022] The interaction module supports user-triggered input interfaces, including but not limited to: virtual buttons on the vehicle's central control screen, touch panels on the reading lights, rear control screens, voice recognition units, and cockpit domain controller command channels. Each interaction unit of the module is mapped to a preset scene mode. When a user interacts with a particular interaction unit, the module generates a trigger signal (the first trigger signal) based on the preset scene mode triggered by that interaction unit.

[0023] Optionally, an interaction unit refers to a physical or logical input interface provided to the user in the system. Each interaction unit is pre-bound to a specific preset scene mode (such as a makeup mode button, a reading mode touch icon, etc.), supporting the user to initiate a lighting configuration request through a single, intuitive action; it can be a mechanical button, a capacitive touch area, a voice recognition keyword, an APP virtual control, etc.

[0024] The detection module refers to a fatigue and state perception unit that integrates multi-source heterogeneous signals, including a seat pressure distribution sensor array (sitting posture stability), an on-board camera (head nodding angular rate), and a vehicle controller (follow-distance anomaly rate and lane departure rate obtained via CAN bus), which together generate a structured driver fatigue signal; it also integrates a built-in real-time clock for time period discrimination.

[0025] Optionally, the detection module includes a seat pressure distribution sensor module, an onboard camera module, and a vehicle controller module. The seat pressure distribution sensor module detects the driver's seating posture in real time; the onboard camera module collects the driver's eyelid closure frequency and head nodding angle change rate in real time; the vehicle controller module acquires the driver's following distance abnormality rate and lane keeping deviation rate in real time. Finally, the vehicle controller integrates the detected data and generates a driver fatigue signal based on the seating posture type, eyelid closure frequency, head nodding angle change rate, following distance abnormality rate, and lane keeping deviation rate.

[0026] Prior to this, the vehicle reading light system also includes a coordination module, which is connected to the control module and the LED light source module respectively, and can support ambient light-related control.

[0027] In one example, the seating posture type output by the seat pressure distribution sensor module is first identified and scored. The system classifies the driver's seating posture into five types: normal upright, leaning forward, slouching backward, tilting to the side, and a seatless posture. Normal upright represents an alert state and scores zero; leaning forward reflects a slight decrease in attention and scores 0.3; slouching backward is a typical fatigue posture and scores 0.7; tilting to the side indicates weakened body control and scores 0.6; and a seatless posture is considered invalid data and is not included in subsequent calculations. This score is used as the seating posture fatigue score.

[0028] Subsequently, the vehicle-mounted camera module tracks the driver's eyelid closure every ten seconds. The system defines a valid closure as the eyelid covering more than 20% of the pupil area, and calculates the percentage of time within those 10 seconds that meets this condition. If this percentage is less than 15%, eyelid fatigue is scored as zero; if it is between 15% and 45%, it is linearly converted to a score between 0 and 1; if it reaches or exceeds 45%, eyelid fatigue is scored as 1.

[0029] Secondly, the vehicle-mounted camera module simultaneously analyzes the driver's head tilt angle changes. The system continuously records the number of complete head nodding movements (from upward to downward and back to upward) within 10 seconds. If no nodding occurs within 10 seconds, head fatigue is scored as 0; if it occurs 1 to 4 times, the score is calculated by dividing the actual number by 5; if it occurs 5 times or more, head fatigue is scored as 1.

[0030] Then, the vehicle controller module obtains following distance data from the driver assistance system in real time. The system sets a safe following distance threshold of 1.8 seconds, and checks whether the current following distance is lower than this safe following distance threshold every 100ms. The number of samples that are lower than the safe following distance threshold within 10 seconds is counted, and then divided by 100. The result is the following distance fatigue score, which also does not exceed 1.

[0031] Next, the vehicle controller module simultaneously acquires lane keeping data. The system considers a lateral deviation of the vehicle's centerline from the lane centerline by more than 0.3 as an anomaly. It also counts the number of anomaly samples within 10 seconds, divides the result by 100, and the result is the lane keeping fatigue score, which also does not exceed 1.

[0032] Understandably, the five fatigue levels mentioned above represent the fatigue levels in five dimensions: posture, eyelids, head, following distance, and lane keeping, all ranging from 0 to 1. The system dynamically adjusts the emphasis on each dimension based on the vehicle's current state: when the vehicle is moving, eyelid and head movements receive the most attention, followed by following distance and lane keeping, with posture receiving the lowest weight; when the vehicle is parked but the engine is still running, posture becomes the primary criterion, and the weights of the other four items decrease accordingly.

[0033] The system weights and sums the adjusted fatigue scores for each item, then divides the sum by the total weights to obtain a comprehensive fatigue score. This comprehensive fatigue score automatically decays over time, with the decay rate varying depending on the indicator: eyelid and head data are updated quickly and are highly timely, resulting in faster decay; sitting posture data is relatively stable, resulting in slower decay. The system continuously monitors this comprehensive fatigue score, and only when the comprehensive fatigue score reaches or exceeds 0.55 three times consecutively, with each instance spaced 10 seconds apart, i.e., accumulating for more than 30 seconds, is a fatigue tendency confirmed.

[0034] Finally, the system will perform a false alarm check: if the vehicle speed is above 80 kilometers per hour and the lane keeping error rate is below one-tenth, then regardless of the aforementioned score, the fatigue signal will not be triggered. Only after all the above steps are completed will the system finally generate a valid driver fatigue signal, which will be used to activate intervention measures such as blue light pulses in the rhythm mode.

[0035] The control module refers to a core electronic control unit integrated into the vehicle reading light system. Essentially, it is an embedded controller with data processing, logic judgment, and signal output functions.

[0036] Optionally, the main functions of the control module in this application include: receiving a first trigger signal from the interaction module and a second trigger signal from the detection module, identifying the specific preset scene mode pointed to by the signal; retrieving the preset color temperature value, brightness percentage, driving ratio of each light source, color rendering constraint conditions, and rhythm adjustment parameters of the preset scene mode from the built-in memory; and then converting these control parameters into executable electrical signal instructions.

[0037] Figure 4 A flowchart illustrating a method for controlling a vehicle-mounted reading light according to an embodiment of this application is shown. Exemplarily, the method for controlling the vehicle-mounted reading light includes: Step S402: Determine the target scene mode of the first trigger signal or the second trigger signal.

[0038] Among them, reference Figure 2 The first trigger signal refers to a digital control signal generated by the user's active operation of the interactive module (such as clicking the virtual button on the central control screen, touching the reading light panel, using voice commands, or selecting from the rear control screen) to request the activation of a preset scene mode (such as reading mode, makeup mode, etc.).

[0039] The second trigger signal refers to the control signal generated autonomously by the detection module and not initiated by the user. This second trigger signal can reflect the autonomous perception and intelligent response capabilities of the vehicle reading light system.

[0040] The target scene mode refers to the lighting operation mode that is ultimately selected and executed by the system at any given time.

[0041] Specifically, when a user actively operates the interaction module (such as clicking the virtual buttons on the central control screen, touching the reading light panel, using voice commands, or selecting from the rear control screen), a digital control signal is generated to request the activation of a preset scene mode, i.e., the target scene mode (such as reading mode, makeup mode, etc.); or when the detection module in the vehicle reading light system detects that a certain state has been reached (such as reaching a preset time or detecting a driver fatigue signal), a control signal is automatically generated to request the activation of a preset scene mode, i.e., the target scene mode.

[0042] Through the above embodiments, the vehicle reading light system achieves dual accurate recognition and unified semantic mapping of the user's explicit intent and the vehicle / human implicit state, and unifies the analysis of discrete human-computer interaction input and multi-source heterogeneous sensor signals into a structured target scene pattern, avoiding the pattern conflict or response lag caused by the separation of manual intervention and automatic response logic in traditional solutions.

[0043] Step S404: Determine the target control parameters corresponding to the target scene mode based on the control parameters corresponding to each preset scene mode.

[0044] Control parameters refer to a structured set of values ​​that are preset to achieve a specific lighting effect and biological effect target, and can be directly invoked by the control module and converted into hardware driving signals. Optional parameters include basic optical parameters such as target color temperature values ​​and extended functional parameters such as custom lighting parameters.

[0045] Preset scene modes refer to a set of standardized lighting strategies preset by the system and oriented towards specific vehicle use tasks or physiological needs. In this application, these include makeup mode, reading mode, leisure mode, standard mode, office mode, first biological rhythm regulation mode, and second biological rhythm regulation mode.

[0046] The target control parameters refer to the subset of all control parameters used for this lighting control that the control module uniquely retrieves and extracts from the locally stored preset scene mode control parameter library after determining the specific preset scene mode to be executed (i.e., the target scene mode).

[0047] Specifically, since the control module has pre-stored optimized parameter groups, i.e. control parameters, that correspond one-to-one with various preset scene modes, when the target scene mode that is currently triggered is determined through step S402, the control parameters corresponding to the target scene mode can be queried from the control parameters corresponding to various preset scene modes as the target control parameters.

[0048] Through the above embodiments, a deterministic mapping mechanism from trigger signals (first and second) to preset scene modes is established, ensuring that the system can uniquely and predictably activate the optimal lighting strategy under complex working conditions (such as nighttime parking or initial signs of fatigue), significantly improving human-factor adaptability and control reliability.

[0049] Step S406: Based on the target control parameters, generate a control signal and send it to the corresponding target independent drive circuit to adjust the reading lamp device corresponding to the target independent drive circuit.

[0050] Among them, the control signal refers to the low-level hardware electrical signal output by the control module, which is used to drive the light source.

[0051] A target-independent driving circuit refers to a specific driving unit in the driving power module that corresponds one-to-one with the LED light source channel that needs to be controlled.

[0052] Independent drive circuits refer to multiple constant current / PWM drive units configured within the drive power module that are physically isolated and whose electrical parameters can be programmed separately; each unit is independently connected to and controls one LED light source device (e.g., white light, red light, green light, blue light), supporting asynchronous dimming without crosstalk between channels.

[0053] Specifically, the control module parses the target control parameters (including color temperature value, brightness percentage and custom lighting parameters, such as blue light ratio, skin color rendering index, etc.) corresponding to the target scene mode, and maps them to the current / voltage reference or PWM duty cycle and frequency parameters required by each LED light source channel.

[0054] Subsequently, multiple parallel digital control signals are generated and sent to the independent driving circuits in the driver power module that correspond one-to-one with the white, red, green, and blue LED devices, thereby achieving precise control of each light source at the millisecond level, without crosstalk, and with programmable spectrum.

[0055] Through the above embodiments, by directly converting high-level scene semantic parameters into channel-level drive signals executable by the underlying hardware, end-to-end closed-loop control of scene-spectrum-electrical signals is realized; each independent drive circuit is physically isolated and electrically decoupled, ensuring the color temperature accuracy, brightness linearity and blue light pulse timing accuracy in the multi-color LED mixing process, avoiding color drift and rhythm intervention failure caused by traditional single-channel dimming.

[0056] In one embodiment, step S404 includes the following steps: In the preset scene mode control parameter library, query the color temperature value, brightness percentage, and custom lighting parameters corresponding to the target scene mode.

[0057] The retrieved color temperature value, brightness percentage, and custom lighting parameters will be used as the target control parameters for the target scene mode.

[0058] Among them, the preset scene mode control parameter library (built-in scene parameter library) refers to the structured parameter table stored in the local secure storage area of ​​the control module. The preset scene mode is used as the index key, and each record contains a set of multi-dimensional light parameters, i.e. control parameters, that have been verified by human factors engineering and circadian biology under that mode.

[0059] Color temperature refers to the correlated color temperature of the output spectrum of the LED hybrid light source in the target scene. Its physical implementation depends on the driving ratio coefficient of the four LED channels (white / red / green / blue) and is used to characterize the warmth or coolness of the light.

[0060] Brightness percentage refers to the relative illuminance level output by the reading light in the target scene. It is based on the maximum rated luminous flux of the lamp as 100% and can be adjusted to the range of 5%–85% as needed. Brightness percentage controls the total radiant flux of each channel by adjusting the PWM duty cycle or constant current amplitude.

[0061] Custom lighting parameters refer to differentiated light quality indicators introduced for specific preset scene modes. They are not general parameters, but rather characteristic variables that are strongly coupled with human needs.

[0062] Specifically, since the control module has pre-stored optimized parameter groups corresponding to various preset scene modes, including (color temperature value, brightness percentage and custom lighting parameters), after the target scene mode is determined through step S402, the color temperature value, brightness percentage and custom lighting parameters corresponding to the target scene mode can be queried from the color temperature value, brightness percentage and custom lighting parameters corresponding to various preset scene modes as target control parameters.

[0063] Through the above embodiments, a one-click mapping from preset scene modes to control parameters is achieved through a structured parameter library, solidifying the results of human factors engineering and circadian rhythm biology verification into executable control instructions, avoiding response delays caused by real-time calculations; and through collaborative lookup table output of color temperature, brightness, and custom parameters, the performance of visual tasks in each mode is guaranteed.

[0064] In one example, the preset scene modes built into the control module include, but are not limited to: makeup mode, reading mode, leisure mode, standard mode, office mode, etc.

[0065] Understandably, the makeup mode, reading mode, leisure mode, standard mode, and office mode mentioned above are selectable options, not options that can be selected simultaneously. When the first trigger signal / second trigger signal determines one of the target scene modes among the above five modes, the target control parameters of the lighting settings corresponding to that target scene mode are also determined accordingly (custom lighting parameters, color temperature value, brightness percentage; of course, the custom lighting parameters will also be different due to the different specific preset scene modes).

[0066] If the target scene mode is makeup mode, the color temperature value and brightness percentage corresponding to makeup mode are found in the preset scene mode control parameter library as the first color temperature value and the first brightness percentage, and the custom lighting parameter corresponding to makeup mode is the skin color rendering index value.

[0067] Specifically, the makeup mode refers to a lighting scenario designed for the precise facial manipulation needs of occupants (especially front passenger / rear passenger). Its key feature is prioritizing the accurate color rendering of the skin. The system uses a preset combination of a high color rendering index (CRI) as the skin CRI, a medium-high color temperature (e.g., 4500K–5500K) as the first color temperature, and a moderate brightness (e.g., 30%–50%) as the first brightness percentage. It also activates a combination of reading light devices containing red / amber spectral components to suppress blue light interference, thereby improving the accuracy of skin tone recognition and the reliability of makeup operations.

[0068] Furthermore, firstly, based on the skin color rendering index value corresponding to the makeup mode, a first reading light device combination for skin color rendering is selected from multiple independently controllable reading light devices; then, based on the first color temperature value and the first brightness percentage, the PWM control signal of each first reading light device in the first reading light device combination is determined; finally, the PWM control signal of each first reading light device is sent to the first target independent drive circuit corresponding to each first reading light device.

[0069] If the target scene mode is reading mode, the color temperature value and brightness percentage corresponding to reading mode are found in the preset scene mode control parameter library as the second color temperature value and the second brightness percentage, respectively, and the custom lighting parameter corresponding to reading mode is the blue light ratio value.

[0070] Specifically, the reading mode refers to a focused lighting scenario with the dual goals of visual clarity and eye fatigue prevention. The system uses a higher color temperature (e.g., 5000K–6500K) as the second color temperature value and medium-high brightness (approximately 40%–70%) as the second brightness percentage based on preset parameters, and actively controls the proportion of blue light radiation (e.g., limiting the energy proportion of the 440–490nm band to ≤25%). This ensures text contrast while reducing circadian rhythm interference, making it suitable for long-term reading of paper / electronic documents.

[0071] Furthermore, firstly, based on the blue light ratio value corresponding to the reading mode, a second reading light device combination is selected from multiple independently controllable reading light devices to provide blue light at the blue light ratio value; then, based on the second color temperature value and the second brightness percentage, the PWM control signal of each second reading light device in the second reading light device combination is determined; and the PWM control signal of each second reading light device is sent to the second target independent drive circuit corresponding to each second reading light device.

[0072] Understandably, the first target independent driving circuit, the second target independent driving circuit, and the third target independent driving circuit are all members of a set of multiple independent driving circuits. They have the same hardware structure, and the only difference is the source of the control signal (from which preset scene mode corresponding to the control parameters) and the output object (which type of lamp device combination is driven).

[0073] If the target scene mode is leisure mode, the color temperature value and brightness percentage corresponding to leisure mode can be found in the preset scene mode control parameter library as the third color temperature value and the third brightness percentage, respectively.

[0074] Leisure mode refers to a low-stimulation lighting scenario that creates a relaxing atmosphere; it uses a warm color temperature (e.g., 2700K–3500K) as the third color temperature value, a soft brightness (e.g., 15%–35%) as the third brightness percentage, and flicker-free continuous light output. Optionally, cool white / blue light devices are turned off, focusing on the contribution of the red-orange spectrum, reducing pupil constriction intensity and cortical arousal level, suitable for non-task-oriented states such as taking a nap, chatting, or watching videos in the car.

[0075] If the target scene mode is the standard mode, the color temperature value and brightness percentage corresponding to the standard mode can be found in the preset scene mode control parameter library as the fourth color temperature value and the fourth brightness percentage, respectively.

[0076] The standard mode refers to a default lighting reference scenario that balances versatility, safety, and energy efficiency. It adopts a neutral color temperature (e.g., 4000K) as the fourth color temperature value, medium brightness (e.g., 35%–55%) as the fourth brightness percentage, and a balanced full-spectrum distribution. It does not emphasize specific physiological regulation functions, meets most daily short-term lighting needs (such as retrieving objects, conversing, and emergency viewing), and serves as a parameter reference baseline for other modes (e.g., biological rhythm regulation is dynamically offset from it).

[0077] If the target scene mode is office mode, the color temperature value and brightness percentage corresponding to office mode can be found in the preset scene mode control parameter library as the fifth color temperature value and the fifth brightness percentage.

[0078] Office mode refers to an enhanced task lighting scenario that supports light office work in the car (such as video conferencing, document processing, and handwritten annotations). It is characterized by high uniformity lighting, moderate color temperature (e.g., 4200K–5000K) as the fifth color temperature value, medium-high brightness (e.g., 50%–80%) as the fifth brightness percentage, and low blue light ratio constraint (slightly more lenient than reading mode, e.g., ≤30%). It can also be linked with the camera to achieve adaptive lighting for face orientation, ensuring natural skin tones and no overexposure of the background in the video.

[0079] Through the above embodiments, five mutually exclusive preset scene modes are strongly bound to spectral parameters to achieve precise human-factor adaptation: the makeup mode ensures high color rendering and improves skin tone recognition; the reading / office mode dynamically controls the blue light ratio to balance clarity and circadian rhythm protection; the leisure mode uses a low color temperature to promote relaxation; and the standard mode provides a robust benchmark.

[0080] In one embodiment, reference Figure 3 The preset scene modes in this application also include a first biological rhythm regulation mode (a type of rhythm mode), used to further fine-tune the control parameters corresponding to the above five basic preset scene modes (makeup mode, reading mode, leisure mode, standard mode, and office mode) at special times, specifically including: If the target scene mode is the first biological rhythm adjustment mode triggered by the built-in clock, according to the current preset scene mode, query the color temperature attenuation ratio, brightness attenuation percentage and custom lighting parameter attenuation value that the first biological rhythm adjustment mode needs to adjust compared to the current preset scene mode in the preset scene mode control parameter library. Based on the color temperature attenuation ratio, brightness attenuation percentage, and custom lighting parameter attenuation value, the color temperature value, brightness percentage, and custom lighting parameters corresponding to the current preset scene mode are adjusted to obtain the attenuated color temperature value, brightness percentage, and custom lighting parameters. Based on the attenuated color temperature value, brightness percentage, and custom lighting parameters, an attenuation control signal is generated and sent to the corresponding target independent drive circuit.

[0081] The built-in clock refers to a high-precision real-time clock circuit, also known as a clock module, integrated inside the control module. It has functions for timing year, month, day, hour, minute, and second, as well as timed interrupt triggering. It does not rely on external networks or vehicle system time, operates independently, and supports continuous operation across day and night cycles. It is used to automatically trigger the first biological rhythm regulation mode at a preset time (e.g., 22:00).

[0082] The first biological rhythm regulation mode refers to a passive light environment regulation scenario based on the human circadian rhythm physiological model. It is automatically activated by a built-in clock at fixed time periods (e.g., 21:00–06:00 at night). Its purpose is to inhibit the delay of melatonin secretion and promote physiological relaxation. It achieves photobiological effect regulation by systematically attenuating lighting parameters.

[0083] The preset scene mode control parameter library refers to a structured data table stored in the non-volatile memory of the control module. Each record is associated with a preset scene mode (including basic modes such as makeup / reading / standard and first / second biological regulation modes). The core fields include: color temperature value, brightness percentage, custom lighting parameters (such as blue light ratio value, skin color rendering index), and the dynamic offset of each (first and second) biological regulation mode relative to the reference mode (standard mode) (i.e., color temperature attenuation ratio value, brightness attenuation percentage, and custom lighting parameter attenuation value).

[0084] The color temperature attenuation ratio is a dimensionless coefficient that represents the amount of color temperature reduction required by the first biological regulation mode compared to the current preset scene mode. It is used to calculate the color temperature value after attenuation = current color temperature value × (1 - color temperature attenuation ratio). For example, if the current color temperature is 4000K and the attenuation ratio is 0.25, then the color temperature value after attenuation will be 3000K.

[0085] The brightness attenuation percentage refers to the percentage reduction in brightness required by the first biological law adjustment mode compared to the current preset scene mode. It is used to calculate the brightness after attenuation = current brightness × (1 - brightness attenuation percentage / 100). For example, if the current brightness is 50% and the attenuation percentage is 40%, then the brightness after attenuation will be 30%.

[0086] The custom lighting parameter attenuation value refers to a dimensionless coefficient that characterizes the percentage reduction in custom lighting parameters required by the first biological regulation mode compared to the current preset scene mode. For example, it is a dimensionless coefficient representing the percentage of blue light radiation energy, used to calculate the attenuated blue light ratio = current blue light ratio × (1 - custom lighting parameter attenuation value). For example, if the current blue light ratio is 25% and the attenuation ratio is 0.6, then the attenuated value will be 10%.

[0087] Specifically, when the built-in clock reaches the preset nighttime (e.g., 22:00), the control module recognizes and triggers the first biological rhythm adjustment mode; it looks up the table to obtain the preset offset (color temperature attenuation ratio value 0.25, brightness attenuation percentage 40%, custom lighting parameter attenuation value 0.6) corresponding to the currently running preset scene mode (e.g., standard mode, color temperature 4000K, brightness 45%, blue light ratio 20%); it calculates that the attenuated parameters are color temperature 3000K, brightness 27%, and blue light ratio 8%; based on this, it generates a corresponding PWM signal to drive the combination of red light and amber light devices to output warm and soft low blue light lighting, while turning off the blue light and cool white light devices.

[0088] Through the above embodiments, without user intervention, the color temperature, brightness and blue light radiation are automatically reduced during physiologically sensitive periods, effectively reducing the inhibition of melatonin synthesis, alleviating the difficulty in falling asleep and rhythm disorders caused by nighttime in-vehicle lighting, improving the comfort of drivers and passengers at night and their alertness the next day, and the whole process is based on existing in-vehicle hardware, without increasing system complexity and cost.

[0089] In one embodiment, the preset scene mode in this application further includes a second biological rhythm regulation mode (another type of rhythm mode), used to further fine-tune the control parameters corresponding to the above five basic preset scene modes (makeup mode, reading mode, leisure mode, standard mode, and office mode) under special conditions, specifically including: If the target scene mode is the second biological rhythm adjustment mode triggered by the driver fatigue signal detected through the fatigue detection interface, according to the current preset scene mode, query the preset scene mode control parameter library to find the color temperature increase ratio, brightness increase percentage and custom lighting parameter increase value that the second biological rhythm adjustment mode needs to adjust compared to the current preset scene mode. Based on the color temperature increase ratio, brightness increase percentage, and custom lighting parameter increase value, the color temperature value, brightness percentage, and custom lighting parameter corresponding to the current preset scene mode are adjusted to obtain the increased color temperature value, brightness percentage, and custom lighting parameter. Based on the increased color temperature value, brightness percentage, and custom lighting parameters, an increase control signal is generated and sent to the corresponding target independent drive circuit.

[0090] Among them, the driver fatigue signal refers to the binary physiological state judgment result generated by the detection module by integrating multi-source vehicle sensor data; the generation basis is: the seat pressure distribution sensor identifies a continuously collapsed sitting posture, the vehicle camera detects an eyelid closure frequency ≥25 times / minute and a head nodding angle change rate ≥8° / s, and the vehicle controller calculates a following distance abnormality rate >15% or a lane keeping deviation rate >12%. When at least two of the three indicators exceed the limit, the vehicle controller outputs a high-level driver fatigue signal.

[0091] The second biological law regulation mode refers to an active light-induced wake-up regulation scenario triggered by the driver's real-time fatigue state. It does not rely on preset time, but uses fatigue signals as the sole activation condition. Its purpose is to enhance alertness and resist cognitive dullness and operational sluggishness caused by fatigue. It is a dynamic enhancement and superposition regulation of the five basic preset scenario modes.

[0092] The color temperature increase ratio is a dimensionless coefficient that represents the amount of color temperature increase required by the second biological regulation mode compared to the current preset scene mode. It is used to calculate the color temperature value after the increase = current color temperature value × (1 + color temperature increase ratio). For example, if the current color temperature is 4000K and the increase ratio is 0.2, then the color temperature value after the increase will be 4800K.

[0093] The percentage increase in brightness refers to the percentage increase in brightness required by the second biological law adjustment mode compared to the current preset scene mode. It is used to calculate the increased brightness = current brightness × (1 + percentage increase in brightness / 100). For example, if the current brightness is 40% and the increase percentage is 30%, then the increased brightness will be 52%.

[0094] The custom lighting parameter increase value refers to a dimensionless coefficient that characterizes the percentage increase in custom lighting parameters required by the second biological regulation mode compared to the current preset scene mode. For example, it is a dimensionless coefficient representing the percentage of blue light radiation energy, used to calculate the increased blue light ratio = current blue light ratio × (1 + custom lighting parameter increase value). For example, if the current blue light ratio is 20% and the increase value is 0.4, then the increased ratio will be 28%.

[0095] Specifically, when the detection module outputs a driver fatigue signal, the control module identifies and triggers the second biological regulation mode; it then looks up the table to obtain the preset offset corresponding to the current operating preset scene mode (such as leisure mode, color temperature 3000K, brightness 25%, no blue light ratio constraint) (color temperature increase ratio value 0.25, brightness increase percentage 35%, custom lighting parameter increase value 0.3).

[0096] The parameters after the increase are calculated to be color temperature 3750K, brightness 33.75%, and blue light ratio 8.4% (if there was no blue light originally, then the baseline value is 10% × 1.3 = 13%). Based on this, a PWM signal is generated to activate the combination of cool white light and blue light devices, appropriately increase the color temperature and blue light component, and maintain the overall spectral continuity to avoid abrupt stimulation.

[0097] Through the above embodiments, when the driver shows signs of physiological fatigue, the lighting parameters with photobiological awakening effect are automatically adjusted. By controllably increasing the color temperature and blue light radiation intensity, the cortical arousal and alertness recovery are effectively promoted, the fatigue response delay is shortened, and the driving risk caused by inattention is reduced. Moreover, the adjustment range is anchored to the current basic mode to ensure a natural transition of the light environment without glare, taking into account both safety and comfort.

[0098] It is understood that the system in this embodiment corresponds to the vehicle reading light control method in the above embodiment, and the options in the above embodiment are also applicable to this embodiment, so they will not be described again here.

[0099] This application also provides a vehicle, exemplary of which includes the aforementioned vehicle-mounted reading light system.

[0100] This application also provides a vehicle device, exemplary of which includes a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program to enable the vehicle device to perform the above-described vehicle reading light control method or the functions of various modules in the above-described vehicle reading light system.

[0101] The processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, including at least one of a Central Processing Unit (CPU), Graphics Processing Unit (GPU), Network Processor (NP), Digital Signal Processor (DSP), Application-Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor, capable of implementing or executing the methods, steps, and logic block diagrams disclosed in the embodiments of this application.

[0102] Memory can be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), and Electrically Erasable Programmable Read-Only Memory (EEPROM). Memory is used to store computer programs, and the processor can execute these programs upon receiving execution instructions.

[0103] This application also provides a computer-readable storage medium for storing computer programs used in the aforementioned vehicle equipment. For example, the computer-readable storage medium may include, but is not limited to, various media capable of storing program code, such as a USB flash drive, a portable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0104] In the several embodiments provided in this application, it should be understood that the disclosed systems and methods can also be implemented in other ways. The system embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that, in alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0105] In addition, the functional modules or units in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0106] If a function is implemented as a software module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part 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 several instructions to cause a computer device (which may be a smartphone, personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application.

[0107] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A vehicle-mounted reading light system, characterized in that, include: The light source module includes multiple independently controllable reading light devices; The driving power module includes multiple independent driving circuits, each of which controls one of the reading light devices; The interaction module is configured with multiple interaction units, each of which corresponds to a preset scene mode, and is used to respond to a trigger operation for any one of the interaction units and generate a first trigger signal. The detection module is used to generate a second trigger signal when a preset time is reached or when a driver fatigue signal is detected. The control module is used to determine the target scene mode of the first trigger signal or the second trigger signal; determine the target control parameters corresponding to the target scene mode according to the control parameters corresponding to each preset scene mode; and generate a control signal according to the target control parameters and send it to the corresponding target independent driving circuit to adjust the reading light device corresponding to the target independent driving circuit.

2. The system according to claim 1, characterized in that, The detection module includes a seat pressure distribution sensor module, an in-vehicle camera module, and a vehicle controller module. The detection module is used to detect driver fatigue signals, including: The seat pressure distribution sensor module is used to detect the driver's sitting posture type; The vehicle-mounted camera module is used to collect the driver's eyelid closure frequency and head nodding angle change rate; The vehicle controller module is used to acquire the following distance abnormality rate and lane keeping deviation rate of the driver. The vehicle controller module is also used to generate driver fatigue signals based on the sitting posture type, the eyelid closure frequency, the head nodding angle change rate, the following distance abnormality rate, and the lane keeping deviation rate.

3. A vehicle, characterized in that, The vehicle includes the vehicle-mounted reading light system as described in claim 1 or 2.

4. A method for controlling a vehicle-mounted reading light, characterized in that, Applied to the system according to any one of claims 1-3, the method is executed by the control module, comprising: Determine the target scene mode of the first trigger signal or the second trigger signal; Based on the control parameters corresponding to each preset scene mode, determine the target control parameters corresponding to the target scene mode; Based on the target control parameters, a control signal is generated and sent to the corresponding target independent drive circuit to adjust the reading light device corresponding to the target independent drive circuit.

5. The method according to claim 4, characterized in that, The step of determining the target control parameters corresponding to the target scene mode based on the control parameters corresponding to each preset scene mode includes: In the control parameter library corresponding to the preset scene mode, query the color temperature value, brightness percentage and custom lighting parameters corresponding to the target scene mode; The color temperature value, the brightness percentage, and the custom lighting parameters obtained from the query will be used as the target control parameters corresponding to the target scene mode.

6. The method according to claim 5, characterized in that, The preset scene modes include two or more of the following: makeup mode, reading mode, leisure mode, standard mode, and office mode; In the control parameter library corresponding to the preset scene mode, the color temperature value, brightness percentage and custom lighting parameters are different for each preset scene mode. In the control parameter library corresponding to the preset scene mode, the color temperature value and brightness percentage corresponding to the makeup mode are the first color temperature value and the first brightness percentage, respectively, and the custom lighting parameter corresponding to the makeup mode is the skin color rendering index value. In the control parameter library corresponding to the preset scene mode, the color temperature value and brightness percentage corresponding to the reading mode are the second color temperature value and the second brightness percentage, respectively, and the custom lighting parameter corresponding to the reading mode is the blue light ratio value; In the control parameter library corresponding to the preset scene mode, the color temperature value and brightness percentage corresponding to the leisure mode are the third color temperature value and the third brightness percentage, respectively. In the control parameter library corresponding to the preset scene mode, the color temperature value and brightness percentage corresponding to the standard mode are the fourth color temperature value and the fourth brightness percentage, respectively. In the control parameter library corresponding to the preset scene mode, the color temperature value and brightness percentage corresponding to the office mode are the fifth color temperature value and the fifth brightness percentage, respectively.

7. The method according to claim 6, characterized in that, If the target scene mode is the makeup mode, the step of generating a control signal and sending it to the corresponding target independent drive circuit according to the target control parameters includes: Based on the skin color rendering index value corresponding to the makeup mode, a first reading light device combination for skin color rendering is selected from multiple independently controllable reading light devices. Based on the first color temperature value and the first brightness percentage, determine the PWM control signal of each first reading lamp device in the first reading lamp device combination; The PWM control signal of each of the first reading lamp devices is sent to the first target independent drive circuit corresponding to each of the first reading lamp devices.

8. The method according to claim 6, characterized in that, If the target scene mode is the reading mode, the step of generating a control signal and sending it to the corresponding target independent drive circuit according to the target control parameters includes: Based on the blue light ratio value corresponding to the reading mode, a second reading light device combination is selected from multiple independently controllable reading light devices to provide blue light at the blue light ratio value; Based on the second color temperature value and the second brightness percentage, determine the PWM control signal for each second reading lamp device in the second reading lamp device assembly; The PWM control signal of each of the second reading lamp devices is sent to the second target independent drive circuit corresponding to each of the second reading lamp devices.

9. The method according to claim 6, characterized in that, The scenario mode also includes a first biological law regulation mode, and the method further includes: If the target scene mode is triggered by the built-in clock, according to the current target scene mode, query the control parameter library corresponding to the preset scene mode to find the color temperature attenuation ratio, brightness attenuation percentage and custom lighting parameter attenuation value that the first biological rhythm adjustment mode needs to be adjusted compared to the current target scene mode. Based on the color temperature attenuation ratio, the brightness attenuation percentage, and the blue light attenuation ratio, the color temperature value, brightness percentage, and custom lighting parameters corresponding to the current target scene mode are adjusted to obtain the attenuated color temperature value, brightness percentage, and custom lighting parameters. Based on the attenuated color temperature value, brightness percentage, and custom lighting parameters, an attenuation control signal is generated and sent to the corresponding target independent drive circuit.

10. The method according to claim 6, characterized in that, The scenario mode also includes a second biological regulation mode, and the method further includes: If the target scene mode is triggered by the driver fatigue signal, according to the current target scene mode, the control parameter library corresponding to the preset scene mode is consulted to find the color temperature increase ratio, brightness increase percentage and custom lighting parameter increase value that the second biological regulation mode needs to adjust compared to the current target scene mode. Based on the color temperature increase ratio, the brightness increase percentage, and the blue light increase ratio, the color temperature value, brightness percentage, and custom lighting parameters corresponding to the current target scene mode are adjusted to obtain the increased color temperature value, brightness percentage, and custom lighting parameters. Based on the increased color temperature value, brightness percentage, and custom lighting parameters, an increase control signal is generated and sent to the corresponding target independent drive circuit.

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