Synchronous control system for laser television projector and electric curtain

Abstract

The invention discloses a synchronous control system for a laser television projector and an electric curtain, and relates to the technical field of synchronous control systems, the synchronous control system comprises a main control unit, an environment sensing module, a bidirectional feedback execution mechanism and a fault tolerance network, the main control unit carries multi-protocol communication interfaces, the multi-protocol communication interfaces are HDMI-CEC, Bluetooth 5.2 and Zigbee 3.0, and the environment sensing module is connected with the bidirectional feedback execution mechanism. The master control unit is internally provided with a cooperative state machine engine, and the cooperative state machine engine defines a linkage state set of the projector and the curtain. Through an OPCUA protocol interface provided with a main control unit and a smart home center controller, the scene is that a villa audio-video room is close to an underground garage, a curtain generates low-frequency vibration due to vehicle entering and exiting, according to the implementation mode, a Kistler8692C5 piezoelectric sensor is installed on a curtain rotating shaft, the sampling rate is 1kHz, when vibration of the amplitude of 4 Hz per 0.08 mm is detected, a main control unit outputs reverse-phase sine waves, the phase difference of the reverse-phase sine waves is 180 degrees plus or minus 5 degrees, and the real-time performance of the system is improved. And the motor of the lens of the projector executes compensation displacement, so that the functions of reducing image vibration and improving the viewing effect are realized.

Description

Technical Field

[0001] This invention relates to the field of synchronous control system technology, specifically a synchronous control system for a laser TV projector and an electric screen. Background Technology

[0002] With the widespread adoption of 4K / 8K ultra-high-definition display technology, users are demanding higher levels of automation from home theater systems. Traditional motorized screens require manual control, and their operation, separate from the projector's power switch, no longer meets the need for convenience. Synchronous control systems, which detect the projector's power status or signal output to automatically raise and lower the screen, have become standard in high-end home theaters. Laser TVs, with their advantages of high brightness, wide color gamut, and long lifespan, are gradually replacing traditional projectors. Their ultra-short-throw lens design allows projectors to be installed flush against the wall, but a dedicated screen is required to optimize image quality. The synchronous control system needs to be adapted to the special installation method of laser TVs to ensure that the screen's raising and lowering is strictly synchronized with the projector's start and stop. However, existing synchronous control systems for laser TV projectors and motorized screens cannot reduce screen vibrations that can affect the viewing experience.

[0003] The shortcomings of existing synchronous control systems for laser TV projectors and motorized screens are:

[0004] 1. Patent document CN111142455A discloses a linkage device connecting a projector and an electric screen, "including a CPU processor, a control module, a voltage regulator module, a USB interface module, and a signal transmission module. The CPU processor is connected to the control module, the voltage regulator module, and the USB interface module respectively. The CPU processor is connected to the motor controller through the signal transmission module. The invention has a simple working principle, good energy-saving effect, reduces the size of the control system, and can realize rapid adjustment and control of the screen. In addition, the signal transmission module used has strong anti-interference ability and high transmission efficiency, further improving control efficiency." However, the existing synchronous control system of laser TV projectors and electric screens cannot reduce the impact of screen vibration on the viewing effect. Summary of the Invention

[0005] The purpose of this invention is to provide a synchronous control system for a laser TV projector and an electric screen, so as to solve the technical problem mentioned in the background art that the existing synchronous control system for laser TV projectors and electric screens cannot reduce screen vibration and affect the viewing effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a synchronous control system for a laser TV projector and an electric screen, comprising: a main control unit, an environmental sensing module, a bidirectional feedback actuator, and a fault-tolerant network. The main control unit is equipped with a multi-protocol communication interface, which includes HDMI-CEC, Bluetooth 5.2, and Zigbee 3.0. The main control unit has a built-in collaborative state machine engine that defines a set of linkage states for the projector and screen, including sleep, wake-up, projection, retraction, and fault states. The main control unit also integrates a dynamic priority arbitration module that responds to external commands and system events. In response to the conflict, the environmental perception module includes a light sensor array, a TOF sensor, and a microphone array. The light sensor array is used to monitor the ambient illuminance and color temperature of the projection area. The TOF sensor is used to detect the distance and flatness of foreign objects on the screen surface. The microphone array is used to identify the direction of the sound source at the user's location. The bidirectional feedback actuator includes a projector end and a screen end. The projector end consists of a laser power regulator, a lens shift motor, and a cooling fan PWM controller. The screen end has a DC motor with a Hall encoder and a tension feedback strain gauge. When communication is interrupted, the fault-tolerant network predicts the actions of the other device based on historical behavior data. The projector overheat protection signal is directly connected to the screen motor emergency stop circuit.

[0007] Preferably, the external command is a user remote control or APP, the system event is over-temperature or signal loss, and the DC motor of the Hall encoder is used to provide real-time feedback on the lifting position.

[0008] Preferably, the dynamic priority arbitration module adopts a fuzzy rule base. When the fuzzy rule base user instruction AND system failure occurs, THEN executes fault handling with a weight of 0.9. When the fuzzy rule base screen is blocked AND the projection brightness is greater than 200 nits, THEN triggers a red light flashing alarm.

[0009] Preferably, the TOF sensor works in conjunction with the reflective marker array integrated at the edge of the curtain to calculate the deflection of the curtain plane through triangulation, with the accuracy of the plane deflection being ±0.5°.

[0010] Preferably, the historical behavior data of the fault-tolerant network is stored in a dual-port RAM.

[0011] Preferably, the main control unit and the smart home central control unit's OPCUA protocol interface map the device status into a digital twin and synchronize it to the cloud topology map in real time. A piezoelectric sensor is added to the screen motor base to collect the mechanical vibration spectrum of 0.1-200Hz in real time. The main control unit dynamically generates an anti-phase vibration reduction waveform and actively cancels the image jitter through the projector lens displacement motor.

[0012] Preferably, the main control unit includes a protocol conflict decision tree. When HDMI-CEC commands and Zigbee commands arrive simultaneously, the protocol conflict decision tree prioritizes executing device status change commands, and executes parameter adjustment commands with a delay of less than or equal to 500ms. The status change commands are power on or power off, and the parameter adjustment commands are brightness or volume. The Bluetooth broadcast channel is allocated with two time slots to transmit an 8-bit projection status code and a 10-bit screen position code, respectively.

[0013] Preferably, it includes the following steps;

[0014] Step S1, Cooperative Wake-up: After receiving the power-on command, the projector sends an encrypted handshake pulse to the screen. The pulse frequency is 1Hz three times. After the screen verifies the pulse, it starts with reduced resistance and simultaneously feeds back the real-time voltage and current curves to the main control unit.

[0015] Step S2, Adaptive Projection: Based on the TOF sensor data, the adaptive projection calculates the optical path distortion compensation matrix caused by the curtain folds, and dynamically calculates the laser power color gamut mapping table in combination with the ambient illuminance.

[0016] Step S3, Security Collaboration: If the projector's cooling fan speed is below the threshold, the screen slow-down protocol is triggered. The slow-down protocol speed is 5-7 cm per second. When the microphone detects that the user has been away for more than 10 minutes, hierarchical sleep mode is initiated. Hierarchical sleep mode first reduces power by 30%, and then turns off completely after 60 seconds.

[0017] Preferably, in step S1, the encrypted handshake pulse uses Manchester encoding, and the carrier frequency adaptively hops according to the ambient electromagnetic noise intensity. The adaptive hopping frequency is 2.4GHz ±100MHz. In step S3, if the user returns during the power reduction stage, the fast warm-up mode is activated. The user return measurement is 3~4m from the sound source location, the laser operates at 120% rated power for 3 seconds, and the lens motor is pre-adjusted to the closest historical focal length of the user.

[0018] Preferably, the user feedback enhancement is achieved by fusing a microphone array with an infrared pyroelectric sensor to construct a two-factor liveness detection system with a sound source localization radius of 3m. In the preheating mode, the screen automatically unfolds to the user's historical best viewing angle, which is the viewpoint recorded after 30 uses.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention maps the device status to a digital twin through the OPCUA protocol interface between the main control unit and the smart home central control unit, and synchronizes it to the cloud topology map in real time. A piezoelectric sensor is added to the base of the screen motor to collect the mechanical vibration spectrum of 0.1-200Hz in real time. The main control unit dynamically generates an anti-phase vibration reduction waveform, which actively cancels the image jitter through the projector lens displacement motor. Scenario: A villa home theater is near an underground garage, and the screen vibrates at low frequencies due to vehicles entering and exiting. Implementation method: A Kistler 8692C5 piezoelectric sensor is installed on the screen hinge with a sampling rate of 1kHz. When a vibration of 4Hz with an amplitude of 0.08mm is detected, the main control outputs an anti-phase sine wave with a phase difference of 180° ± 5° and an amplitude of 0.06mm. The projector lens motor performs compensation displacement, thereby reducing image vibration and improving the viewing experience.

[0021] 2. This invention, through secure collaboration, triggers a screen slow-down protocol if the projector's cooling fan speed falls below a threshold. The slow-down protocol operates at a speed of 5-7 cm per second. When the microphone detects that the user has been away for more than 10 minutes, a tiered sleep mode is initiated. This tiered sleep mode first reduces power by 30%, then completely shuts down after 60 seconds. Upon user return, the system enhances the microphone array fusion with an infrared pyroelectric sensor to construct a two-factor liveness detection system with a sound source localization radius of 3m. In preheating mode, the screen automatically unfolds to the user's historical optimal viewing angle, which is determined by recording 30 usage data points. This achieves the function of automatically adjusting the optimal viewing angle to improve user comfort.

[0022] 3. This invention addresses system events such as overheating or signal loss. A Hall encoder-driven DC motor provides real-time feedback on lifting and lowering positions. A dynamic priority arbitration module employs a fuzzy rule base. When a user instruction and system fault occur, the weight of the fault handling is 0.9. When the screen is jammed and the projection brightness exceeds 200 nits, a red light flashing alarm is triggered. A TOF sensor and a reflective marker array integrated at the screen edge work collaboratively. Triangulation is used to calculate the screen's planar deflection, with an accuracy of ±0.5°. Historical behavior data from the fault-tolerant network is stored in a dual-port RAM. The main control unit interfaces with the smart home central control via the OPCUA protocol, mapping the device status to a digital twin and synchronizing it to the cloud topology map in real time. This achieves the goal of avoiding instruction loss rates in traditional solutions and improving operational smoothness.

[0023] 4. In step S1, the encrypted handshake pulse uses Manchester encoding, and the carrier frequency adaptively hops according to the ambient electromagnetic noise intensity. The adaptive hopping frequency is 2.4GHz ±100MHz. In step S3, if a user return is detected during the power reduction stage, a rapid preheating mode is activated. The user return measurement is a sound source location of 3~4m. The laser operates at 120% rated power for 3 seconds, and the lens motor is pre-adjusted to the closest historical focal length of the user. The user return is enhanced by a microphone array fused with an infrared pyroelectric sensor to construct a two-factor liveness detection. The sound source location radius is 3m. In the preheating mode, the screen automatically unfolds to the user's historical best viewing angle. The best viewing angle is based on 30 usage data records. This realizes a graded sleep strategy to reduce standby power consumption and improve energy efficiency and economy. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main control unit of the present invention;

[0025] Figure 2 This is a schematic diagram of the control flow of the present invention;

[0026] Figure 3 This is a schematic diagram of the experimental data for this invention. Detailed Implementation

[0027] 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.

[0028] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand this according to the specific circumstances.

[0030] Example 1: Please refer to Figure 1 and Figure 2 A synchronous control system for a laser TV projector and an electric screen includes: a main control unit, an environmental sensing module, a bidirectional feedback actuator, and a fault-tolerant network. The main control unit is equipped with a multi-protocol communication interface, including HDMI-CEC, Bluetooth 5.2, and Zigbee 3.0. The main control unit has a built-in collaborative state machine engine that defines the linkage state set of the projector and screen, which includes sleep, wake-up, projection, retraction, and fault states. The main control unit also integrates a dynamic priority arbitration module that responds to conflicts between external commands and system events. The environmental sensing module includes... It includes a light sensor array, a TOF sensor, and a microphone array. The light sensor array is used to monitor the ambient illuminance and color temperature of the projection area. The TOF sensor is used to detect the distance and flatness of foreign objects on the screen surface. The microphone array is used to identify the user's position and the direction of the sound source. The bidirectional feedback actuator includes a projector end and a screen end. The projector end consists of a laser power regulator, a lens shift motor, and a cooling fan PWM controller. The screen end has a DC motor with a Hall encoder and a tension feedback strain gauge. The fault-tolerant network predicts the actions of the other device based on historical behavior data when communication is interrupted. The projector overheat protection signal is directly connected to the screen motor emergency stop circuit.

[0031] External commands are provided by user remote control or APP, system events include over-temperature or signal loss, and the DC motor with Hall encoder is used to provide real-time feedback on lifting position.

[0032] The dynamic priority arbitration module uses a fuzzy rule base. When the user command AND system failure occurs, THEN executes the fault handling weight of 0.9. When the screen is blocked AND the projection brightness is greater than 200 nits, THEN triggers a red light flashing alarm.

[0033] The TOF sensor works in conjunction with the reflective marker array integrated at the edge of the screen to calculate the screen's planar deflection through triangulation, with an accuracy of ±0.5°.

[0034] Historical behavior data of the fault-tolerant network is stored in a dual-port RAM.

[0035] The OPCUA protocol interface between the main control unit and the smart home central control unit maps the device status into a digital twin and synchronizes it to the cloud topology map in real time. A piezoelectric sensor is added to the base of the screen motor to collect the mechanical vibration spectrum of 0.1-200Hz in real time. The main control unit dynamically generates an anti-phase vibration reduction waveform, which actively cancels the image jitter through the projector lens shift motor.

[0036] The main control unit includes a protocol conflict decision tree. When HDMI-CEC and Zigbee commands arrive simultaneously, the protocol conflict decision tree prioritizes executing device status change commands. If the delay is less than or equal to 500ms, parameter adjustment commands are executed. Status change commands are power on or power off, and parameter adjustment commands are brightness or volume. The Bluetooth broadcast channel is allocated with two time slots to transmit the projection status code (8 bits) and the screen position code (10 bits) respectively.

[0037] Includes the following steps;

[0038] Step S1, Cooperative Wake-up: After receiving the power-on command, the projector sends an encrypted handshake pulse to the screen. The pulse frequency is 1Hz three times. After the screen verifies the pulse, it starts with reduced resistance and simultaneously feeds back the real-time voltage and current curves to the main control unit.

[0039] Step S2, Adaptive Projection: Based on the TOF sensor data, the adaptive projection calculates the optical path distortion compensation matrix caused by the curtain folds, and dynamically calculates the laser power color gamut mapping table in combination with the ambient illuminance.

[0040] Step S3, Security Collaboration: If the projector's cooling fan speed is below the threshold, the screen slow-down protocol is triggered. The slow-down protocol speed is 5-7 cm per second. When the microphone detects that the user has been away for more than 10 minutes, hierarchical sleep mode is initiated. Hierarchical sleep mode first reduces power by 30%, and then turns off completely after 60 seconds.

[0041] In step S1, the encrypted handshake pulse uses Manchester encoding, and the carrier frequency adaptively hops according to the intensity of ambient electromagnetic noise. The adaptive hopping frequency is 2.4GHz ±100MHz. In step S3, if the user returns during the power reduction stage, the fast warm-up mode is activated. The user return measurement is the sound source location 3~4m, the laser works at 120% rated power for 3 seconds, and the lens motor is pre-adjusted to the closest historical focal length of the user.

[0042] The user feedback is enhanced by a microphone array fused with an infrared pyroelectric sensor to construct a two-factor liveness detection system with a sound source localization radius of 3m. In preheating mode, the screen automatically unfolds to the user's historical best viewing angle, which is based on 30 recorded usage data.

[0043] Example 2: Please refer to Figure 1 and Figure 2A synchronous control system for a laser TV projector and an electric screen is disclosed. The main control unit uses an OPCUA protocol interface with a smart home control center to map the device status as a digital twin, synchronizing it to a cloud topology map in real time. A piezoelectric sensor is added to the screen motor base to collect the mechanical vibration spectrum from 0.1-200Hz in real time. The main control unit dynamically generates an anti-phase vibration-damping waveform, which actively compensates for image jitter via the projector lens displacement motor. Scenario: A villa home theater is located near an underground garage, where the screen experiences low-frequency vibrations due to vehicles entering and exiting. Implementation: A Kistler 8692C5 piezoelectric sensor is installed on the screen hinge with a sampling rate of 1kHz. When a 4Hz vibration with an amplitude of 0.08mm is detected, the main control unit outputs an anti-phase sine wave with a phase difference of 180° ± 5° and an amplitude of 0.06mm. The projector lens motor performs compensating displacement, achieving the function of reducing image vibration and improving the viewing experience.

[0044] Example 3, please refer to Figure 1 and Figure 2 A synchronous control system for a laser TV projector and an electric screen, wherein in step S1, after receiving the power-on command, the projector sends an encrypted handshake pulse to the screen. The pulse frequency is 1Hz three times. After verifying the pulse, the screen starts with reduced resistance and simultaneously feeds back the real-time voltage and current curves to the main control unit.

[0045] Step S2, Adaptive Projection: Based on the TOF sensor data, the adaptive projection calculates the optical path distortion compensation matrix caused by the curtain folds, and dynamically calculates the laser power color gamut mapping table in combination with the ambient illuminance.

[0046] Step S3, Security Collaboration: If the projector's cooling fan speed is below the threshold, the screen slow-down protocol is triggered. The slow-down protocol speed is 5-7 cm per second. When the microphone detects that the user has been away for more than 10 minutes, a graded sleep mode is initiated. The graded sleep mode first reduces the power by 30%, and then turns it off completely after 60 seconds. When the user returns, the microphone array is integrated with an infrared pyroelectric sensor to construct a two-factor liveness detection. The sound source localization radius is 3m. In the preheating mode, the screen automatically unfolds to the user's historical best viewing angle. The best viewing angle is recorded based on 30 usage data, realizing the function of automatically adjusting the best viewing angle to improve user comfort.

[0047] Example 4, please refer to Figure 1 and Figure 2A synchronous control system for a laser TV projector and an electric screen includes: a main control unit, an environmental sensing module, a bidirectional feedback actuator, and a fault-tolerant network. The main control unit is equipped with a multi-protocol communication interface, including HDMI-CEC, Bluetooth 5.2, and Zigbee 3.0. The main control unit has a built-in collaborative state machine engine that defines the linkage state set of the projector and screen, which includes sleep, wake-up, projection, retraction, and fault states. The main control unit also integrates a dynamic priority arbitration module that responds to conflicts between external commands and system events. The environmental sensing module includes a light sensor array, a TOF sensor, and a microphone array. An array of sensors monitors the ambient illuminance and color temperature of the projection area. A Time-of-Flight (TOF) sensor detects the distance to foreign objects and the flatness of the screen surface. A microphone array identifies the user's position and the direction of the sound source. The bidirectional feedback actuator includes both the projector and screen ends. The projector end comprises a laser power regulator, a lens shift motor, and a PWM controller for the cooling fan. The screen end features a DC motor with a Hall encoder and a tension feedback strain gauge. A fault-tolerant network predicts the actions of the other device based on historical behavior data when communication is interrupted. The projector's overheat protection signal is directly connected to the screen motor's emergency stop circuit. External commands are provided via user remote control or an app. System events include overheating or signal loss. The Hall encoder-equipped DC motor provides real-time feedback on the lifting position. The dynamic priority arbitration module uses a fuzzy rule base. When a user command AND system failure occurs, THEN executes fault handling with a weight of 0.9. When the screen jams AND the projection brightness exceeds 200 nits, THEN triggers a red flashing alarm. A TOF sensor and a reflective marker array integrated at the screen edge work together to calculate the screen's planar deflection through triangulation, with an accuracy of ±0.5°. Historical behavior data of the fault-tolerant network is stored in a dual-port RAM. The main control unit interfaces with the smart home central control via the OPCUA protocol, mapping the device status to a digital twin and synchronizing it to the cloud topology map in real time. A piezoelectric sensor is added to the screen motor base for real-time... The system collects mechanical vibration spectrum from 0.1 to 200 Hz, and the main control unit dynamically generates anti-phase vibration cancellation waveforms. The projector lens shift motor actively cancels image jitter. The main control unit includes a protocol conflict decision tree. When HDMI-CEC and Zigbee commands arrive simultaneously, the protocol conflict decision tree prioritizes executing device status change commands. If the delay is less than or equal to 500 ms, parameter adjustment commands are executed. Status change commands are power on or power off, and parameter adjustment commands are brightness or volume. The Bluetooth broadcast channel is allocated with two time slots to transmit the projection status code (8 bits) and the screen position code (10 bits) respectively. This achieves the function of avoiding the command loss rate in traditional solutions and improving the smoothness of operation.

[0048] Example 5, please refer to Figure 1 and Figure 2A synchronous control system for a laser TV projector and an electric screen includes the following steps;

[0049] Step S1, Collaborative Wake-up: After receiving the power-on command, the projector sends an encrypted handshake pulse to the screen three times at a frequency of 1Hz. The screen verifies the pulse and then starts with reduced resistance, simultaneously feeding back real-time voltage and current curves to the main control unit. Step S2, Adaptive Projection: Based on TOF sensor data, adaptive projection calculates the optical path distortion compensation matrix caused by screen wrinkles and dynamically calculates the laser power color gamut mapping table in conjunction with ambient illuminance. Step S3, Security Collaboration: If the projector's cooling fan speed is below a threshold, a screen slow-down protocol is triggered. The slow-down protocol speed is 5-7cm per second. When the microphone detects that the user has been away for more than 10 minutes, a graded sleep mode is initiated. The graded sleep mode first reduces power by 30%, then completely shuts down after 60 seconds. (Step S1...) The encrypted handshake pulse uses Manchester encoding, and the carrier frequency adaptively hops according to the ambient electromagnetic noise intensity. The adaptive hopping frequency is 2.4GHz ±100MHz. In step S3, if a user return is detected during the power reduction stage, a fast preheating mode is activated. The user return measurement is the sound source location 3~4m away. The laser operates at 120% rated power for 3 seconds, and the lens motor is pre-adjusted to the closest historical focal length of the user. The user return is enhanced by the microphone array fusion with an infrared pyroelectric sensor to construct a two-factor liveness detection. The sound source location radius is 3m. In the preheating mode, the screen automatically unfolds to the user's historical best viewing angle. The best viewing angle is based on 30 usage data records. This realizes a graded sleep strategy to reduce standby power consumption and improve energy efficiency and economy.

[0050] Comparative experiment:

[0051] The difference between Comparative Example 1 and Example 1 is that;

[0052] The multi-protocol communication interfaces include HDMI-CEC, Bluetooth 5.2, and Zigbee 3.0. The main control unit has a built-in collaborative state machine engine, which defines the linkage state set between the projector and the screen. The linkage state set includes sleep, wake-up, projection, retraction, and fault. The main control unit integrates a dynamic priority arbitration module, which responds to conflicts between external commands and system events. The environmental perception module includes a light sensor array, a TOF sensor, and a microphone array. The light sensor array is used to monitor the ambient illuminance and color temperature of the projection area. The TOF sensor is used to detect the distance and flatness of foreign objects on the screen surface. The microphone array is used to identify the direction of the sound source at the user's location. The bidirectional feedback actuator includes the projector end and the screen end. The projector end includes a laser power regulator, a lens shift motor, and a cooling fan PWM controller. The screen end has a DC motor with a Hall encoder and a tension feedback strain gauge. The fault-tolerant network predicts the actions of the other device based on historical behavior data when communication is interrupted. The projector overheat protection signal is directly connected to the screen motor emergency stop circuit.

[0053] The difference between Comparative Example 1 and Example 2 is that;

[0054] The OPCUA protocol interface between the main control unit and the smart home central control unit maps the device status as a digital twin and synchronizes it to the cloud topology map in real time. A piezoelectric sensor is added to the base of the screen motor to collect the mechanical vibration spectrum of 0.1-200Hz in real time. The main control unit dynamically generates an anti-phase vibration cancellation waveform, which actively cancels the image jitter through the projector lens displacement motor. Scenario: A villa home theater is near an underground garage. The screen vibrates at low frequencies due to vehicles entering and exiting. Implementation method: A Kistler 8692C5 piezoelectric sensor is installed on the screen hinge with a sampling rate of 1kHz. When a vibration of 4Hz with an amplitude of 0.08mm is detected, the main control unit outputs an anti-phase sine wave with a phase difference of 180° ± 5° and an amplitude of 0.06mm. The projector lens motor performs compensation displacement.

[0055] The difference between Comparative Example 1 and Example 3 is that;

[0056] Step S1, Cooperative Wake-up: After receiving the power-on command, the projector sends an encrypted handshake pulse to the screen. The pulse frequency is 1Hz three times. After the screen verifies the pulse, it starts with reduced resistance and simultaneously feeds back the real-time voltage and current curves to the main control unit.

[0057] Step S2, Adaptive Projection: Based on the TOF sensor data, the adaptive projection calculates the optical path distortion compensation matrix caused by the curtain folds, and dynamically calculates the laser power color gamut mapping table in combination with the ambient illuminance.

[0058] Step S3, Security Collaboration: If the projector's cooling fan speed is below the threshold, the screen slow-down protocol is triggered. The slow-down protocol speed is 5-7 cm per second. When the microphone detects that the user has been away for more than 10 minutes, a graded sleep mode is initiated. The graded sleep mode first reduces the power by 30%, and then turns it off completely after 60 seconds. When the user returns, the microphone array is enhanced with an infrared pyroelectric sensor to construct a two-factor liveness detection. The sound source localization radius is 3m. In the preheating mode, the screen automatically unfolds to the user's historical best viewing angle, which is the optimal viewing angle based on 30 recorded usage data.

[0059] The difference between Comparative Example 1 and Example 4 is that;

[0060] The system comprises a main control unit, an environmental sensing module, a bidirectional feedback actuator, and a fault-tolerant network. The main control unit features multi-protocol communication interfaces, including HDMI-CEC, Bluetooth 5.2, and Zigbee 3.0. It also incorporates a collaborative state machine engine that defines the linkage state set between the projector and screen, including sleep, wake-up, projection, retraction, and fault states. A dynamic priority arbitration module is integrated within the main control unit to handle conflicts between external commands and system events. The environmental sensing module includes a light sensor array, a Time-of-Flight (TOF) sensor, and a microphone array. The light sensor array monitors the environment in the projection area. Illuminance and color temperature are measured. A TOF sensor is used to detect the distance to foreign objects and the flatness of the screen surface. A microphone array is used to identify the user's position and the direction of the sound source. The bidirectional feedback actuator includes a projector end and a screen end. The projector end consists of a laser power regulator, a lens shift motor, and a cooling fan PWM controller. The screen end has a DC motor with a Hall encoder and a tension feedback strain gauge. The fault-tolerant network predicts the actions of the other device based on historical behavior data when communication is interrupted. The projector overheat protection signal is directly connected to the screen motor emergency stop circuit. External commands are user remote control or APP. System events include overheating or signal loss. The Hall encoder DC motor is used for real-time feedback of lifting and lowering positions. The dynamic priority arbitration module uses a fuzzy rule base. When a user command AND system failure occurs, THEN executes fault handling with a weight of 0.9. When the screen is jammed AND the projection brightness exceeds 200 nits, THEN triggers a red flashing alarm. A TOF sensor and a reflective marker array integrated at the screen edge work together to calculate the screen's planar deflection using triangulation, with an accuracy of ±0.5°. Fault-tolerant network historical behavior data is stored in dual-port RAM. The main control unit interfaces with the smart home central control via the OPCUA protocol, mapping device status to a digital twin and synchronizing it in real-time to the cloud topology map. A piezoelectric sensor is added to the motor base to collect the mechanical vibration spectrum of 0.1-200Hz in real time. The main control unit dynamically generates an anti-phase vibration reduction waveform, which actively cancels the image jitter through the projector lens shift motor. The main control unit includes a protocol conflict decision tree. When HDMI-CEC and Zigbee commands arrive at the same time, the protocol conflict decision tree prioritizes the execution of device status change commands. If the delay is less than or equal to 500ms, parameter adjustment commands are executed. Status change commands are power on or power off, and parameter adjustment commands are brightness or volume. The Bluetooth broadcast channel is allocated with two time slots to transmit the projection status code (8 bits) and the screen position code (10 bits) respectively.

[0061] The difference between Comparative Example 1 and Example 5 is that;

[0062] Collaborative wake-up: After receiving the power-on command, the projector sends an encrypted handshake pulse to the screen three times at a frequency of 1Hz. The screen verifies the pulse and then starts with reduced resistance, simultaneously feeding back real-time voltage and current curves to the main control unit. Step S2: Adaptive projection: Based on TOF sensor data, adaptive projection calculates the optical path distortion compensation matrix caused by screen wrinkles and dynamically calculates the laser power color gamut mapping table in conjunction with ambient illuminance. Step S3: Security collaboration: If the projector's cooling fan speed is lower than the threshold, a screen slow-down protocol is triggered. The slow-down protocol speed is 5~7cm per second. When the microphone detects that the user has been away for more than 10 minutes, a graded sleep mode is initiated, which first reduces power by 30%. After 0 seconds, all is turned off. In step S1, the encrypted handshake pulse uses Manchester encoding. The carrier frequency adaptively hops according to the intensity of ambient electromagnetic noise. The adaptive hopping frequency is 2.4GHz ±100MHz. In step S3, if the user returns during the power reduction stage, the fast warm-up mode is activated. The user return measurement is the sound source location 3~4m. The laser works at 120% rated power for 3 seconds. The lens motor is pre-adjusted to the closest historical focal length of the user. The user return enhancement is the microphone array fused with an infrared pyroelectric sensor to construct a two-factor liveness detection. The sound source location radius is 3m. In the warm-up mode, the screen automatically unfolds to the user's historical best viewing angle. The best viewing angle is the data recorded from 30 uses.

[0063] The synchronous control systems of Embodiments 1, 2, 3, 4, and 5 of this invention were compared with a traditional synchronous control system (Comparative Example 1) in experiments on synchronous response speed, standby power consumption, and user error rate. The values ​​were calculated and statistically analyzed. The synchronous response speed experiment was conducted using electromagnetic transient simulation analysis at a laboratory temperature of 25°C. The standby power consumption experiment was conducted using a voltmeter, oscilloscope, and current probe at a laboratory temperature of 25°C. The standby power consumption was measured using a power meter. The user error rate experiment simulated 100 normal user operations and recorded the number of errors for statistical analysis. The results are shown in the experimental data table.

[0064]

[0065] The data in the experimental data table show that the synchronization response speeds in Examples 1, 2, 3, 4 and 5 of the present invention are 1, 0.8, 0.7, 0.5 and 0.9 respectively, which are significantly higher than the synchronization response speed in Comparative Example 1. Therefore, it can be seen that the synchronization response speed of the present invention is significantly improved.

[0066] The data from the experimental data table show that the standby power consumption in Examples 1, 2, 3, 4 and 5 of the present invention is 0.5, 0.4, 0.6, 0.8 and 0.7 respectively, which is significantly lower than the standby power consumption in Comparative Example 1. Therefore, it is shown that the standby power consumption of the present invention is significantly reduced.

[0067] The data from the experimental data table show that the user error rates in Examples 1, 2, 3, 4 and 5 of this invention are 2, 3, 2, 3 and 2, respectively, which are significantly lower than the user error rate in Comparative Example 1. Therefore, this invention demonstrates that the user error rate is significantly reduced.

[0068] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A synchronous control system for a laser TV projector and an electric screen, characterized in that, It comprises a master control unit, an environment perception module, a bidirectional feedback actuator and a fault-tolerant network, the master control unit is equipped with a multi-protocol communication interface, the multi-protocol communication interface is HDMI-CEC, Bluetooth 5.2 and Zigbee 3.0, the master control unit is built-in a cooperative state machine engine, the cooperative state machine engine defines a linkage state set of the projector and the screen, the linkage state set is sleep, wake-up, projection, folding and fault, the master control unit is integrated with a dynamic priority arbitration module, the dynamic priority arbitration module is used for responding to the conflict of external instructions and system events, a microphone array is used for identifying the position and sound source direction of the user, the bidirectional feedback actuator comprises a projector end and a screen end, the projector end is a laser power regulator, a lens displacement motor and a cooling fan PWM controller, the screen end is a DC motor with a Hall encoder and a tension feedback strain gauge, when the communication is interrupted, the fault-tolerant network predicts the action of the opposite device based on historical behavior data, the projector overheat protection signal is directly connected to the screen motor emergency stop circuit. The external instruction is a user remote control or APP, the system event is over-temperature or signal loss, the DC motor with the Hall encoder is used for feeding back the lifting position in real time, the environment perception module comprises a light sensor array, a TOF sensor and a microphone array, the light sensor array is used for monitoring the environmental illumination and color temperature of the projection area, and the TOF sensor is used for detecting the distance and flatness of foreign matters on the screen surface.

2. The system according to claim 1, wherein the system further comprises a laser television projector and a motorized curtain. The dynamic priority arbitration module adopts a fuzzy rule base, when the user instruction AND system fault, THEN the fault handling weight is 0.9, when the screen block AND the projection brightness is greater than 200 nit, THEN the red light flashing alarm is triggered.

3. The system according to claim 1, wherein the system further comprises a laser television projector and a motorized curtain. The TOF sensor and the reflection marker array integrated with the screen edge work cooperatively, the screen plane deflection is calculated through triangulation, and the precision of the plane deflection is 0.5°.

4. The system according to claim 1, wherein the system further comprises a laser television projector and a motorized curtain. The historical behavior data of the fault-tolerant network is stored in a dual-port RAM.

5. The synchronization control system of a laser television projector and motorized curtain according to claim 1, characterized in that: The master control unit and the OPCUA protocol interface of the smart home central control map the device state to a digital twin, and synchronizes to a cloud topology in real time, a piezoelectric sensor is additionally arranged on the screen motor base, and the 0.1-200Hz mechanical vibration spectrum is collected in real time, the master control unit dynamically generates an anti-phase vibration cancellation waveform, and the picture jitter is actively offset through the lens displacement motor of the projector.

6. The synchronization control system of a laser television projector and motorized curtain according to claim 1, characterized in that: The master control unit comprises a protocol conflict decision tree, when the HDMI-CEC instruction and the Zigbee instruction arrive at the same time, the device state change type instruction is preferentially executed, the parameter adjustment type instruction is delayed for less than or equal to 500ms, the state change type instruction is power-on or power-off, and the parameter adjustment type instruction is brightness or volume, the Bluetooth broadcast channel is allocated with double time slots, and the projection state code 8bit and the screen position code 10bit are transmitted respectively.

7. The system according to claim 1, wherein the system further comprises a laser television projector and a motorized curtain. The method comprises the following steps:

8. The control method of the synchronization control system of the laser television projector and the motorized curtain, which is suitable for the synchronization control system of the laser television projector and the motorized curtain according to any one of claims 1-7, characterized in that, Step S1, cooperative wake-up, after the projector receives the power-on instruction, an encrypted handshake pulse is sent to the screen, the pulse frequency is 1Hz three times, the screen verifies the pulse and starts to reduce resistance, and simultaneously feeds back the real-time voltage and current curve to the master control unit; ​ Step S2, adaptive projection, adaptive projection calculates the light path distortion compensation matrix caused by the curtain wrinkles according to the TOF sensor data, and dynamically calculates the laser power color gamut mapping table combined with the ambient illumination; Step S3, safety coordination, if the projector cooling fan speed is lower than the threshold value, the curtain slow descent protocol is triggered, the speed of the slow descent protocol is 5~7cm per second, when the microphone recognizes that the user leaves for more than 10 minutes, the hierarchical sleep is started, and the hierarchical sleep is to reduce the power by 30% first, and then turn off after 60 seconds.

9. The control method of the synchronization control system of the laser television projector and the motorized curtain according to claim 8, characterized in that: The encryption handshake pulse in step S1 uses Manchester encoding, and the carrier frequency adaptively frequency hops with the intensity of environmental electromagnetic noise, the adaptive frequency hopping is 2.4GHz positive and negative 100MHz, and in step S3, if the user returns are detected in the power reduction stage, the fast preheating mode is started, the user return measurement is sound source positioning 3~4m, the laser works at 120% rated power for 3 seconds, and the lens motor is pre-adjusted to the nearest user historical focal length.

10. The control method of the synchronization control system of the laser television projector and the motorized curtain according to claim 9, characterized in that: The user return reinforcement is that the microphone array is fused with the infrared pyroelectric sensor to construct a double-factor living body detection, the sound source positioning radius is 3m, and under the preheating mode, the curtain is automatically unfolded to the user's historical best viewing angle, and the best viewing angle is recorded 30 times of use data.

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