Multi-stage sleep and wake-up control system and method for projector

Abstract

The invention relates to the technical field of projector control, in particular to a multi-stage sleep and wake-up control system and method for a projector, and the system comprises a user input detection unit, a power supply assembly, a state management module, a wake-up lock management module, a timing monitoring module and a peripheral power supply control module. The state management module is respectively in signal connection with the other three core modules, the wake-up lock management module maintains a state bitmap and processes lock application and release, the timing monitoring module calculates non-operation duration, the peripheral power supply control module executes differential power supply control on the three groups of peripheral units, and the state management module realizes three-level state conversion. According to the scheme, the problems of single dormancy, task interruption and extensive peripheral management in the prior art are solved, power consumption and response speed balance is achieved, key tasks are protected, and energy efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of projector control technology, specifically to a multi-level sleep and wake-up control system and method for a projector. Background Technology

[0002] Projectors, as commonly used display devices, are widely used in scenarios such as meetings and education. Current technologies mostly employ a single mode for projector sleep control, triggering a uniform sleep command solely by monitoring user operation signals, failing to adjust sleep strategies according to different usage scenarios. In scenarios requiring rapid recovery, such as during meeting breaks, deep sleep results in long wake-up delays, impacting user experience; while in short-term absences, the lack of a shallow sleep option leads to energy waste. More importantly, current technologies lack task awareness mechanisms, making critical background tasks such as firmware updates and hardware calibration easily interrupted due to lack of user operation, compromising system stability and data integrity. Furthermore, all peripherals use a unified power supply control; high-power peripherals are not completely powered off during standby, and low-power peripherals require reinitialization upon wake-up, making it difficult to balance energy efficiency and recovery speed. These issues severely impact the user experience and reliability of projectors.

[0003] Based on the above problems, there is an urgent need for a technical solution that can take into account differentiated hibernation, critical mission protection, and refined peripheral management. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-level sleep and wake-up control system for a projector, including a user input detection unit for detecting user operation signals, a power supply component for providing power to projector peripherals, and a state management module, a wake-up lock management module, a timing monitoring module, and a peripheral power control module. The state management module establishes signal connections with the wake-up lock management module, the timing monitoring module, and the peripheral power control module respectively. The wake-up lock management module maintains a state bitmap, provides a wake-up lock application interface and a release interface, receives lock application requests from task units and updates the bitmap state, and sends a bitmap state signal to the state management module. The timing monitoring module monitors user operation timestamps, calculates the inactivity duration, and sends it to the state management module. The peripheral power control module connects to three groups of peripheral units: an immediate recovery peripheral group, a fast recovery peripheral group, and a completely shut-down peripheral group. The peripheral power control module receives control signals from the state management module and performs differentiated power supply control on the three groups of peripheral units. The state management module receives inactivity duration data and bitmap state signals, and controls the peripheral power control module according to preset conditions to achieve the switching between full-function operation state, low-power sleep state, and deep low-power sleep state.

[0005] Preferably, the wake-up lock management module maintains a 32-bit state bitmap. The wake-up lock management module performs legality verification on lock application requests. The verification includes task unit identity verification, task permission matching, and lock resource conflict detection. The bitmap state is updated only when the identity is legal, the permissions are matched, and there are no resource conflicts. The wake-up lock management module monitors the lock holding time and performs a timeout release operation when the lock holding time reaches 60 minutes.

[0006] Further preferably, the timing monitoring module integrates a clock counter with a timing accuracy of 1 millisecond, and presets two inactive duration thresholds, namely 300 seconds and 1800 seconds; the timing monitoring module calculates the difference between the current time and the last valid operation time, and sends a first threshold signal to the status management module when the difference reaches 300 seconds, and sends a second threshold signal when the difference reaches 1800 seconds; the timing monitoring module provides feedback signals through hardware interrupt, with an interrupt response time of 10 microseconds.

[0007] Further preferably, the differentiated power supply control of the peripheral power control module is achieved through three independent control channels: a direct connection channel, a fast switching circuit channel with a switch response time of 100 microseconds, and a relay switch channel. The immediate recovery peripheral group is connected through the direct connection channel, which includes a user input detection unit and a network interface unit, and the direct connection channel maintains continuous power supply. The fast recovery peripheral group is connected through the fast switching circuit channel, which includes a main processor unit and a display processing unit. The completely shut-down peripheral group is connected through the relay switch channel, which includes an optomechanical light source unit and an audio power amplifier unit. When the relay switch channel is disconnected, all power supplies are cut off, and the standby power consumption is 0.5 milliwatts.

[0008] Further preferably, the system also includes an environmental sensing unit, which comprises a light sensor and a temperature sensor; the light sensor has a measurement range of 0 lux to 1000 lux and a measurement accuracy of 1 lux, and is used to collect ambient light intensity data and send it to the state management module; the temperature sensor has a measurement range of 0℃ to 80℃ and a measurement accuracy of ±0.5℃, and is used to collect ambient temperature data and send it to the state management module; when the state management module performs a state transition, the ambient temperature data must be below 45℃.

[0009] Further optimized, the wake-up lock management module divides task units into critical task units and ordinary task units. Critical task units include firmware update task units, hardware calibration task units, and data synchronization task units, while ordinary task units include interface refresh task units, log recording task units, and auxiliary function operation task units. The wake-up lock requested by critical task units has a higher priority than the wake-up lock requested by ordinary task units. The priority is divided into 3 levels, with critical task units corresponding to levels 1 and 2, and ordinary task units corresponding to level 3. The wake-up lock management module records task execution exception logs, which include task identifiers, timeout durations, current system status data, and resource usage data.

[0010] Further preferably, it also includes an adaptive learning module, which establishes a signal connection with the state management module. The adaptive learning module has a learning cycle of 7 days and updates the state transition optimization parameters once a week. When the light intensity data is greater than 650 lux, the state management module triggers the transition from full-function operation state to low-power sleep state after receiving a 300-second inactivity duration threshold signal. When the light intensity data is between 80 lux and 650 lux, the state management module maintains the full-function operation state and outputs a control signal to reduce the fan speed to 60% of the rated speed and close redundant interfaces. When the light intensity data is less than 10 lux, the state management module triggers the transition from the full-function operation state to a deep low-power sleep state.

[0011] In a further preferred configuration, under full-function operation, all peripheral units are in operation, the optomechanical light source unit operates at rated power, the audio power amplifier unit outputs power ranging from 0.5W to 20W, and the system power consumption is 185W; under low-power sleep mode, the optomechanical light source unit stops operating, the audio power amplifier unit stops outputting, and the main processor unit switches to low-power mode, with a system power consumption of 25W; under deep low-power sleep mode, the peripheral group is completely shut down and power supply is stopped, the main processor unit only retains the wake-up signal detection function, and the system power consumption is 8W.

[0012] A multi-level sleep and wake-up control method for a projector, applied to the multi-level sleep and wake-up control system of the projector described in any one of the above-mentioned methods, includes the following steps:

[0013] S1: Status monitoring step, triggered by timer hardware at 100 millisecond cycles, performs sensor data acquisition, user operation record reading and peripheral unit status detection, collects system status data, environmental parameter data and peripheral working status data, and transmits all collected data to the status decision unit;

[0014] S2: Condition judgment step, performs threshold comparison and logic operation in the comparator circuit, including comparison of no operation duration with preset threshold, wake-up lock state bitmap judgment, environmental parameter threshold judgment and peripheral working state judgment, and the comprehensive judgment result forms a state transition instruction. The state transition instruction includes maintaining the current state, transitioning to low power sleep state, transitioning to deep low power sleep state or waking up to full function operation state.

[0015] S3: State switching step, output power control signal according to state transition instruction, control the power supply of each peripheral unit according to preset timing, and write the current system status data, task execution progress data and configuration parameter data into non-volatile memory.

[0016] S4: State maintenance step, performs power consumption level adjustment and wake-up signal monitoring in the corresponding operating state, monitors wake-up trigger signal in real time, and jumps to the state monitoring step when a valid wake-up trigger signal is detected.

[0017] Further preferably, in step S1, the environmental parameter data includes light intensity data and temperature data, collected at a frequency of 1 time / second; in step S1, the peripheral operating status data includes the power supply status data, operating parameter data, and fault information data of each peripheral unit, transmitted to the status decision unit through a status feedback signal; in step S2, the wake-up lock status bitmap judgment includes querying the 32-bit status bitmap. When the critical task unit executes, the corresponding bit in the 32-bit status bitmap is set to a valid state, and the status decision unit outputs an instruction to maintain full-function operation until the critical task unit's execution progress reaches 100% and no fault information feedback is received, after which the wake-up lock is released; in step S3, state switching. The timing sequence is as follows: When switching to low-power sleep mode, power adjustment operations are performed in the order of optomechanical light source unit, audio power amplifier unit, and main processor unit, with an operation interval of 500 milliseconds; when waking up to full-function operation mode, recovery operations are performed in the order of main processor unit, display processing unit, optomechanical light source unit, and audio power amplifier unit, with a total recovery operation time of 5 seconds; when switching to deep low-power sleep mode, power is cut off in the order of audio power amplifier unit, optomechanical light source unit, and fast recovery peripheral auxiliary module, with an operation interval of 1 second; when waking up to full-function operation mode, after power is restored, hardware self-test, parameter loading, and status calibration are performed, and after the hardware self-test passes, full-function operation mode is entered.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The core inventive technology of this invention lies in setting up four core modules to work collaboratively, introducing a wake-up lock mechanism to achieve task awareness, implementing differentiated power supply control for different peripheral groups, and constructing a three-level sleep state transition system. This technical solution specifically addresses the contradiction of the single sleep mode in existing technologies, avoids interruption of critical tasks, achieves refined management of peripherals, balances rapid response and low power consumption, and ensures stable and efficient system operation. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] Figure 1 This is a connection block diagram of a multi-level sleep and wake-up control system for a projector according to the present invention;

[0022] Figure 2 This is a flowchart of a multi-level sleep and wake-up control method for a projector according to the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Existing technologies suffer from several technical problems: a single sleep mode cannot balance rapid response and deep energy saving; a lack of task awareness leads to interruption of critical tasks; and peripheral management is inefficient.

[0026] Based on this, please refer to Figures 1-2This embodiment provides a multi-level sleep and wake-up control system for a projector, including a user input detection unit for detecting user operation signals, a power supply component for providing power to projector peripherals, a state management module, a wake-up lock management module, a timing monitoring module, and a peripheral power control module. The state management module establishes signal connections with the wake-up lock management module, the timing monitoring module, and the peripheral power control module. These signal connections enable bidirectional or unidirectional transmission of data and control commands through hardware circuitry, ensuring real-time and stable communication between modules. The wake-up lock management module specifically maintains a state bitmap, which marks whether there are currently any tasks requiring the system to maintain its working state. It also provides wake-up lock request and release interfaces. When a task unit needs to run continuously, it submits a request through the request interface. Upon receiving the request, the wake-up lock management module updates the bitmap state and then sends the updated bitmap state signal to the state management module in real time, enabling the state management module to accurately grasp the task's running status. The timed monitoring module continuously monitors user operation timestamps. Each valid user operation is recorded with corresponding time information. By reading the system clock, the difference between the current time and the last valid operation time is calculated, representing the inactivity duration. This time data is sent to the status management module in real time, providing a time basis for status transitions. The peripheral power control module connects to three groups of peripheral units: instant recovery peripherals, fast recovery peripherals, and complete shutdown peripherals. These three groups are categorized based on functional characteristics and power consumption levels. The instant recovery peripherals group prioritizes rapid response, the fast recovery peripherals group balances response speed and power consumption, and the complete shutdown peripherals group focuses on deep energy saving. After receiving control signals from the status management module, the peripheral power control module executes different power supply control strategies for the three groups of peripheral units, achieving differentiated power supply management. The status management module, as the system core, receives inactivity duration data from the timed monitoring module and bitmap status signals from the wake-up lock management module. It then makes a comprehensive decision based on preset status transition conditions and sends corresponding control signals to the peripheral power control module, thereby achieving precise transitions between full-function operation, low-power sleep, and deep low-power sleep states. In this technical solution, the state management module coordinates the work of each module, the wake-up lock management module gives the system task awareness to avoid interruption of critical tasks, the timed monitoring module provides accurate time judgment basis, the peripheral power control module optimizes energy efficiency through differentiated power supply strategy, the three peripheral groups are divided according to characteristics to ensure that the usage needs in different scenarios are met, and the three-level state switching on demand effectively balances fast response and deep energy saving, comprehensively solving the defects of existing technologies.

[0027] Existing technologies lack clear bitmap specifications and legality verification mechanisms for wake-up locks, leading to chaotic lock management.

[0028] Based on this, the wake-up lock management module maintains a 32-bit state bitmap. This 32-bit specification accurately corresponds to different types of task units in the projector system. Each bit specifically corresponds to a particular task unit, and setting the bit to 1 or 0 indicates whether the corresponding task unit holds a wake-up lock. The wake-up lock management module performs strict legality verification on lock request requests. The verification process includes the following three steps: Task unit identity verification: confirming whether the task unit requesting the lock is a legally authorized unit pre-authorized by the system; Task permission matching check: verifying whether the task unit has the corresponding permission level to request a wake-up lock; Lock resource conflict detection: determining whether the bit corresponding to the current task unit has been occupied by another task unit. Only when the above three conditions of legal identity, matching permissions, and no resource conflict are met simultaneously will the wake-up lock management module allow updating the bitmap state and setting the corresponding bit to 1. In addition, the wake-up lock management module monitors the lock holding time in real time and records the holding duration of each wake-up lock through a built-in timing unit. When the lock holding time reaches 60 minutes, the module automatically performs a timeout release operation, setting the corresponding bit to 0. The 32-bit status bitmap design enables precise management of multi-task units; the legality verification process standardizes lock request behavior, avoiding management chaos caused by illegal requests or resource conflicts; the 60-minute timeout release mechanism effectively prevents the wake-up lock from being occupied for a long time, ensuring the reasonable allocation of system resources, thereby ensuring the stable and reliable operation of the task awareness mechanism. Existing technologies have insufficient timed monitoring accuracy and single threshold, making them unable to adapt to multi-level sleep requirements.

[0029] Based on this, the timing monitoring module integrates a clock counter with a timing accuracy of 1 millisecond. This clock counter uses a high-precision crystal oscillator as the timing reference to ensure the accuracy of time calculation and accurately record the time points of user operations and the duration of inactivity. The timing monitoring module presets two inactivity duration thresholds: 300 seconds and 1800 seconds. These two thresholds correspond to the time conditions for transitioning from full-function operation to low-power sleep mode and from low-power sleep mode to deep low-power sleep mode, respectively. The timing monitoring module continuously reads the timestamps in the user operation record and calculates the difference between the current time and the last valid operation time. When the difference reaches 300 seconds, it immediately sends a first threshold signal to the state management module, indicating that it can switch to low-power sleep mode; when the difference reaches 1800 seconds, it sends a second threshold signal, indicating that it can switch to deep low-power sleep mode. The timing monitoring module provides feedback signals through hardware interrupts, with an interrupt response time of 10 microseconds. This hardware interrupt mechanism can quickly trigger the response of the state management module, avoiding signal transmission delays that affect the timeliness of state transitions. The 1-millisecond timing accuracy ensures accurate calculation of the inactivity duration, the dual-threshold design adapts to the different levels of sleep state transition requirements, and the hardware interrupt method ensures the rapid feedback of threshold signals, providing a precise and reliable time trigger basis for multi-level sleep.

[0030] The existing technology does not clearly distinguish the power supply channels for peripheral devices, making it impossible to implement differentiated control.

[0031] Based on this, the differentiated power supply control of the peripheral power control module is achieved through three independent control channels: a direct connection channel, a fast switching circuit channel with a 100-microsecond switch response time, and a relay switch channel. These three channels are designed according to the characteristics of the corresponding peripheral groups to ensure targeted power supply control. The immediate recovery peripheral group is accessed through the direct connection channel. This group includes a user input detection unit and a network interface unit. These two units need to maintain responsiveness at all times; therefore, the direct connection channel maintains continuous power supply without interruption, ensuring timely detection of user operations and rapid response of network connections. The fast recovery peripheral group is accessed through the fast switching circuit channel. This group includes a main processor unit and a display processing unit. The fast switching circuit of this channel uses high-speed semiconductor switching devices to achieve a 100-microsecond fast switching response, enabling rapid power restoration upon wake-up and shortening recovery time. The completely shut-down peripheral group is accessed through the relay switch channel. This group includes an optomechanical light source unit and an audio power amplifier unit. These two units have high power consumption; when the relay switch channel is disconnected, their power supply is completely cut off, reducing standby power consumption to 0.5 milliwatts and achieving deep energy saving. The three independent channels correspond to the functional requirements and power consumption characteristics of different peripheral groups. The direct connection channel ensures instant response capability, the fast switching circuit channel balances response speed and power consumption, and the relay switch channel achieves extreme energy saving. The parameters of each channel are clearly designed, enabling the precise implementation of the peripheral differentiation management strategy.

[0032] Existing technologies lack consideration of environmental parameters, and state transitions are easily affected by the environment.

[0033] Based on this, the system also includes an environmental sensing unit, which consists of a light sensor and a temperature sensor. Both sensors are installed inside the projector's casing to prevent external physical damage and ensure the accuracy of data acquisition. The light sensor has a measurement range of 0 lux to 1000 lux and a measurement accuracy of 1 lux, enabling it to accurately collect light intensity data under different environments. This data reflects the brightness of the usage scenario and provides an environmental reference for state transitions. The temperature sensor has a measurement range of 0℃ to 80℃ and a measurement accuracy of ±0.5℃, specifically collecting temperature data of the projector's operating environment to prevent equipment damage during state transitions due to excessively high temperatures. The light and temperature sensors collect corresponding data in real time and send the data to the state management module via signal transmission lines. When executing state transition decisions, the state management module needs to additionally determine whether the ambient temperature is below 45℃. Only when this condition is met is the state transition operation allowed to proceed, preventing damage to the equipment caused by power consumption adjustments in high-temperature environments. The addition of the environmental sensing unit means that state transition decisions no longer rely solely on time and task information, but combine key environmental parameters. The high-precision design of the light and temperature sensors ensures the reliability of environmental data, and the 45℃ temperature threshold provides a safety guarantee for state transitions, enabling the system to adapt to different environmental scenarios and improve operational stability.

[0034] The existing technology tasks lack priority classification, and critical tasks cannot be prioritized for protection.

[0035] Based on this, the wake-up lock management module divides task units into critical task units and ordinary task units. Critical task units include firmware update task units, hardware calibration task units, and data synchronization task units. These tasks are directly related to the system's stability and functional integrity; interruption may lead to device failure or data loss. Ordinary task units include interface refresh task units, log recording task units, and auxiliary function operation task units. These tasks have less impact on the core system functions and their execution time can be flexibly adjusted according to the system status. Wake-up lock requests from critical task units have higher priority than those from ordinary task units. Priority is divided into three levels: Level 1 for critical task units and Level 2 for ordinary task units. Level 1 has the highest priority and is suitable for urgent and important tasks such as firmware updates; Level 2 is suitable for hardware calibration and data synchronization tasks; and Level 3 is suitable for ordinary task units. When multiple task units request wake-up locks simultaneously, the wake-up lock management module allocates resources according to priority from highest to lowest, ensuring that critical tasks obtain lock resources first and maintain the system's working state until the task is completed. Meanwhile, the wake-up lock management module also records task execution exception logs. The log content includes task identifiers to distinguish different tasks, timeout duration records the duration for which the task exceeds the preset execution time, current system status data reflecting the system operation when the task is abnormal, and resource usage data records the hardware and software resources used by the task. Recording exception logs facilitates subsequent troubleshooting and further improves the reliability of system operation.

[0036] Existing technologies have fixed state transition thresholds, which cannot adapt to environmental changes.

[0037] Based on this, the system also includes an adaptive learning module. This module establishes a signal connection with the state management module, enabling it to read historical state transition data, environmental parameter data, and user usage habit data from the state management module. The adaptive learning module has a learning cycle of 7 days. Within each learning cycle, the module performs statistical analysis on the collected data, identifies user usage patterns under different environmental conditions, and updates the state transition optimization parameters weekly, making the state transition strategy more closely aligned with actual usage scenarios. When the light intensity is greater than 650 lux, it indicates a well-lit environment where the user is likely to be away for a short time. Upon receiving a 300-second inactivity duration threshold signal, the state management module immediately triggers a transition from full-function operation to low-power sleep mode, achieving energy saving. When the light intensity is between 80 and 650 lux, the ambient light is moderate, and the user may use the device at any time. The state management module maintains full-function operation while outputting control signals to reduce the fan speed to 60% of the rated speed and disable redundant interfaces, optimizing power consumption without affecting usability. When the light intensity is below 10 lux, it indicates a nighttime or dimly lit environment where the user's probability of use is low. The state management module triggers a transition from full-function operation to deep low-power sleep mode, maximizing energy saving. The adaptive learning module periodically updates parameters, enabling the system to dynamically adjust its state transition strategy based on changes in light intensity. Combined with fan speed adjustments and redundant interface shutdowns, this further optimizes energy consumption and user experience while adapting to different lighting environments.

[0038] There are no clear standards for power consumption in different states in existing technologies, and the operating states are unclear.

[0039] Based on this, in full-function operation, all peripheral units are in normal working condition. The optical engine and light source unit operates at rated power to ensure that the projection brightness meets the usage requirements. The audio amplifier unit's output power range is set from 0.5W to 20W, which can adaptively adjust according to the user's volume level. The entire system's power consumption is stable at 185W, ensuring the normal operation of all projector functions. In low-power sleep mode, to achieve energy saving while ensuring rapid wake-up, the optical engine and light source unit stops operating, cutting off the power supply to the high-power light source. The audio amplifier unit stops outputting power and no longer consumes power. The main processor unit switches to low-power mode, retaining only the core control functions. At this time, the system's power consumption drops to 25W, achieving significant energy savings while quickly responding to wake-up commands. In deep low-power sleep mode, with the goal of extreme energy saving, the peripheral group is completely shut down and power is cut off. The optical engine and light source unit and the audio amplifier unit are completely powered off. The main processor unit retains only the wake-up signal detection function, and other non-essential functional modules stop working. The system's power consumption is only 8W, minimizing standby power consumption. The operating modes under each state are clearly defined, and the power consumption values ​​are quantified, enabling the system state to be accurately monitored and controlled, ensuring the effective execution of power consumption control strategies, and allowing users and developers to clearly understand the system's operating status.

[0040] Existing technical control methods have vague steps and lack clear implementation standards.

[0041] Based on this, this embodiment provides a multi-level sleep and wake-up control method for a projector, including the following steps.

[0042] S1: The status monitoring step is triggered by a timer hardware at 100-millisecond intervals. The timer hardware generates a fixed-period interrupt signal, triggering the system to perform sensor data acquisition, including light and temperature data acquisition from the environmental sensing unit, reading and extracting user operation information such as user button remote control, and peripheral unit status detection to check the power supply status and operation of each peripheral. Through these three operations, system status data is collected to reflect the overall system operation, environmental parameter data is provided for environmental reference, and peripheral working status data is used to understand the operation status of peripherals. All collected data is transmitted to the status decision unit through the internal data bus to provide a comprehensive basis for subsequent judgment.

[0043] S2: The condition judgment step is completed in the comparator circuit. The comparator circuit performs threshold comparison and logical operation on the collected data. Specifically, it compares the inactivity duration with the preset threshold to determine whether the time condition for state transition has been met, checks the wake-up lock state bitmap to confirm whether there is a task that needs to maintain the current state, checks the environmental parameter threshold to check whether the ambient temperature meets the transition requirements, and checks the peripheral device working status to ensure that the peripheral device can adapt to the state transition. The results of these four judgments are combined to form a clear state transition instruction. The state transition instruction includes maintaining the current state, transitioning to a low-power sleep state, transitioning to a deep low-power sleep state, or waking up to a full-function operating state, ensuring that the direction of state transition is clear.

[0044] S3: State switching step. Output power control signal according to state transition instruction. The power control signal controls the power supply of each peripheral unit according to the preset timing sequence to avoid timing conflicts that may cause equipment failure. At the same time, record the current system status data, task execution progress data to reflect the task completion status, and save the current device settings configuration parameter data into non-volatile memory to prevent data loss.

[0045] S4: State maintenance step. In the corresponding operating state, power consumption level adjustment is performed to adjust the power consumption level according to the state requirements. Wake-up signal monitoring continuously detects whether there is a wake-up command. Wake-up trigger signals are monitored in real time, including signals triggered by user operation and timed wake-up signals. When a valid wake-up trigger signal is detected, the process immediately jumps to the state monitoring step and starts a new round of state monitoring and judgment process.

[0046] The steps of this method are closely linked in a logical order, the execution standards for each step are clear, and the hardware triggering method, data processing content, and instruction type are clearly defined, ensuring that the control process can be stably implemented and repeatedly verified.

[0047] Existing technical methods lack clear specifications for parameter acquisition, judgment logic, and switching timing, which affects the execution effect.

[0048] Based on this, the environmental parameter data in step S1 includes light intensity data and temperature data, with a collection frequency set to once per second to ensure timely capture of changes in environmental parameters and provide real-time data support for decision-making. The peripheral operating status data in step S1 includes the power supply status data of each peripheral unit (whether it is powered on), operating parameter data such as power and speed, and fault information data (whether there are any abnormal faults). This data is transmitted to the status decision unit via a dedicated signal line through a status feedback signal to ensure the accuracy and timeliness of data transmission. Step S2, the wake-up lock status bitmap judgment, involves querying the 32-bit status bitmap, checking the status of each bit in the bitmap one by one. When a critical task unit executes, the corresponding bit is set to 1. After receiving this bitmap information, the status decision unit outputs an instruction to maintain full-function operation until the critical task unit's execution progress reaches 100% and no fault information is fed back, confirming that the task has been successfully completed. Only then is the wake-up lock released, and the corresponding bit is set to 0. In step S3, the state switching timing is strictly set. When switching to low-power sleep mode, power adjustment operations are performed in the order of optomechanical light source unit, audio power amplifier unit, and main processor unit, with an interval of 500 milliseconds between each operation to avoid current fluctuations caused by simultaneous operations. When waking up to full-function operation mode, recovery operations are performed in the order of main processor unit, display processing unit, optomechanical light source unit, and audio power amplifier unit, with the total recovery operation time controlled within 5 seconds to ensure rapid wake-up. When switching to deep low-power sleep mode, power is cut off in the order of audio power amplifier unit, optomechanical light source unit, and fast recovery peripheral auxiliary module, with an operation interval of 1 second to ensure a smooth power-off process. When waking up to full-function operation mode, after power is restored, hardware self-test is performed to check whether the hardware is normal, parameter loading restores the device configuration, and state calibration adjusts the device operation status. Only after the hardware self-test passes completely will the system enter full-function operation mode to ensure system stability. The parameters of each step are clear, the logic is clear, and the timing is reasonable. The data acquisition is comprehensive and accurate, the judgment criteria are specific and feasible, and the switching sequence is scientific and orderly, ensuring the stable and efficient execution of the control method and improving the system's reliability and user experience.

[0049] The embodiments and / or implementation methods described above are merely preferred embodiments and / or implementation methods for implementing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any way. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as the technology or embodiments that are substantially the same as the present invention.

[0050] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A multi-level sleep and wake-up control system for a projector, comprising a user input detection unit for detecting user operation signals and a power supply component for providing power to projector peripherals, characterized in that, It also includes a state management module, a wake-up lock management module, a timing monitoring module, and a peripheral power control module. The state management module establishes signal connections with the wake-up lock management module, the timing monitoring module, and the peripheral power control module, respectively. The wake-up lock management module maintains a state bitmap, provides wake-up lock request and release interfaces, and is used to receive lock request requests from task units and update the bitmap state, and send bitmap state signals to the state management module. The timing monitoring module is used to monitor user operation timestamps, calculate the duration of no operation, and send it to the state management module. The peripheral power control module connects to three groups of peripheral units: an immediate recovery peripheral group, a fast recovery peripheral group, and a complete shutdown peripheral group. The peripheral power control module receives control signals from the status management module and performs differentiated power supply control on the three groups of peripheral units. The status management module receives data on the duration of no operation and bitmap status signals, and controls the peripheral power control module according to preset conditions to realize the switching between full-function operation state, low-power sleep state, and deep low-power sleep state.

2. The multi-level sleep and wake-up control system for the projector according to claim 1, characterized in that, The wake-up lock management module maintains a 32-bit state bitmap. The wake-up lock management module performs legality verification on lock application requests. The verification includes task unit identity verification, task permission matching, and lock resource conflict detection. The bitmap state is updated only when the identity is legal, the permissions are matched, and there is no resource conflict. The wake-up lock management module monitors the lock holding time and performs a timeout release operation when the lock holding time reaches 60 minutes.

3. The multi-level sleep and wake-up control system for the projector according to claim 1, characterized in that, The timing monitoring module integrates a clock counter with a timing accuracy of 1 millisecond and presets two inactive duration thresholds of 300 seconds and 1800 seconds. The timing monitoring module calculates the difference between the current time and the last valid operation time. When the difference reaches 300 seconds, it sends a first threshold signal to the status management module, and when the difference reaches 1800 seconds, it sends a second threshold signal. The timing monitoring module provides feedback signals via hardware interrupt, with an interrupt response time of 10 microseconds.

4. The multi-level sleep and wake-up control system for a projector according to claim 1, characterized in that, The differentiated power supply control of the peripheral power control module is achieved through three independent control channels: a direct connection channel, a fast switching circuit channel with a switching response time of 100 microseconds, and a relay switch channel. The instant recovery peripheral group is connected through the direct connection channel. The instant recovery peripheral group includes a user input detection unit and a network interface unit, and the direct connection channel maintains continuous power supply. The fast recovery peripheral group is connected through a fast switch circuit channel. The fast recovery peripheral group includes the main processor unit and the display processing unit. The completely shut-down peripheral group is connected through a relay switch channel. The completely shut-down peripheral group includes the optomechanical light source unit and the audio power amplifier unit. When the relay switch channel is disconnected, all power supplies are cut off. The standby power consumption is 0.5 milliwatts.

5. The multi-level sleep and wake-up control system for a projector according to claim 1, characterized in that, It also includes an environmental sensing unit, which includes a light sensor and a temperature sensor. The light sensor has a measurement range of 0 lux to 1000 lux and a measurement accuracy of 1 lux. It is used to collect ambient light intensity data and send it to the state management module. The temperature sensor has a measurement range of 0℃ to 80℃ and a measurement accuracy of ±0.5℃. It is used to collect ambient temperature data and send it to the state management module. When the state management module performs a state transition, it must meet the condition that the ambient temperature data is below 45℃.

6. The multi-level sleep and wake-up control system for a projector according to claim 2, characterized in that, The wake-up lock management module divides task units into critical task units and ordinary task units. Critical task units include firmware update task units, hardware calibration task units, and data synchronization task units, while ordinary task units include interface refresh task units, log recording task units, and auxiliary function operation task units. The wake-up lock requested by critical task units has a higher priority than the wake-up lock requested by ordinary task units. The priority is divided into 3 levels, with critical task units corresponding to levels 1 and 2, and ordinary task units corresponding to level 3. The wake-up lock management module records task execution exception logs, which include task identifier, timeout duration, current system status data, and resource usage data.

7. The multi-level sleep and wake-up control system for a projector according to claim 5, characterized in that, It also includes an adaptive learning module, which establishes a signal connection with the state management module. The adaptive learning module has a learning cycle of 7 days and updates the state transition optimization parameters once a week. When the light intensity data is greater than 650 lux, the state management module triggers the transition from full-function operation state to low-power sleep state after receiving the threshold signal of 300 seconds of no operation. When the light intensity data is between 80 lux and 650 lux, the state management module maintains full-function operation and outputs control signals to reduce the fan speed to 60% of the rated speed and shut down redundant interfaces. When the light intensity data is below 10 lux, the state management module triggers the transition from full-function operation to deep low-power sleep state.

8. The multi-level sleep and wake-up control system for a projector according to claim 1, characterized in that, In full-function operation, all peripheral units are in operation, the optomechanical light source unit operates at rated power, the audio power amplifier unit outputs power ranging from 0.5W to 20W, and the system power consumption is 185W. In low-power sleep mode, the optomechanical light source unit stops operating, the audio power amplifier unit stops outputting, and the main processor unit switches to low-power mode, with a system power consumption of 25W. In deep low-power sleep mode, the peripheral group is completely shut down and power supply is stopped, and the main processor unit only retains the wake-up signal detection function, with a system power consumption of 8W.

9. A multi-level sleep and wake-up control method for a projector, applied to the multi-level sleep and wake-up control system of the projector according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Status monitoring step, triggered by timer hardware at 100 millisecond cycles, performs sensor data acquisition, user operation record reading and peripheral unit status detection, collects system status data, environmental parameter data and peripheral working status data, and transmits all collected data to the status decision unit; S2: Condition judgment step, performs threshold comparison and logic operation in the comparator circuit, including comparison of no operation duration with preset threshold, wake-up lock state bitmap judgment, environmental parameter threshold judgment and peripheral working state judgment, and the comprehensive judgment result forms a state transition instruction. The state transition instruction includes maintaining the current state, transitioning to low power sleep state, transitioning to deep low power sleep state or waking up to full function operation state. S3: State switching step, output power control signal according to state transition instruction, control the power supply of each peripheral unit according to preset timing, and write the current system status data, task execution progress data and configuration parameter data into non-volatile memory. S4: State maintenance step, performs power consumption level adjustment and wake-up signal monitoring in the corresponding operating state, monitors wake-up trigger signal in real time, and jumps to the state monitoring step when a valid wake-up trigger signal is detected.

10. The multi-level sleep and wake-up control method for a projector according to claim 9, characterized in that, In step S1, environmental parameter data includes light intensity data and temperature data, collected at a frequency of 1 time / second; in step S1, peripheral operating status data includes power supply status data, operating parameter data, and fault information data of each peripheral unit, transmitted to the status decision unit via status feedback signals; in step S2, the wake-up lock status bitmap judgment includes querying the 32-bit status bitmap. When the critical task unit executes, the corresponding bit in the 32-bit status bitmap is set to a valid state, and the status decision unit outputs an instruction to maintain full-function operation until the critical task unit's execution progress reaches 100% and no fault information feedback is received, at which point the wake-up lock is released; in step S3, the state switching timing is as follows: When switching to low-power sleep mode, power adjustment operations are performed in the order of optomechanical light source unit, audio power amplifier unit, and main processor unit, with an operation interval of 500 milliseconds. When waking up to full-function operation mode, recovery operations are performed in the order of main processor unit, display processing unit, optomechanical light source unit, and audio power amplifier unit, with a total recovery operation time of 5 seconds. When switching to deep low-power sleep mode, power is cut off in the order of audio power amplifier unit, optomechanical light source unit, and fast recovery peripheral auxiliary module, with an operation interval of 1 second. When waking up to full-function operation mode, after power is restored, hardware self-test, parameter loading, and status calibration are performed. After the hardware self-test passes, full-function operation mode is entered.

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