A built-in permissionless interaction method and system based on a light guide film

Abstract

This invention discloses a built-in permissionless interaction method and system based on a photoconductor film, belonging to the field of touch interaction technology. This invention integrates the photoconductor film with the terminal device before it leaves the factory. Through the photoconductor film layer, light source coupling module, optical sensor array, and time-division multiplexing control unit, it achieves pure physical interaction triggering that does not rely on terminal system permissions. This invention provides three built-in solutions: integrated molding with the screen cover, embedded between the touch and display layers, and bonded to the surface of the backlight module, adaptable to high, medium, and low-end devices. Through electrical isolation design, low-power power supply, and timing coordination mechanisms, it ensures that the interaction process does not interfere with native touch, while supporting glove operation, wide temperature environments, and harsh working conditions. This invention solves the problems of cumbersome and poor user experience associated with existing aftermarket photoconductor film application, enabling devices to use permissionless interaction out of the box. It can be widely applied to all categories of touch terminals, including mobile phones, automotive, industrial control, and smart home appliances.

Description

Technical Field

[0001] This invention relates to the fields of optical interaction, smart terminal integration, and human-computer interaction technology, specifically to a built-in permissionless interaction method and system based on a photoconductor film. By integrating the photoconductor film with the touch terminal screen (including integral molding with the screen cover, embedding between the touch layer and the display layer, and attaching it to the surface of the backlight module), the screen light source or ambient light is reused, and permissionless physical triggering is achieved through optical coupling. It is applicable to all smart devices with touch screens, such as mobile phones, tablets, computers, automotive touch screens, industrial control screens, smartwatches, and smart home appliance touch panels. It solves the problems in the prior art where photoconductor films only support adhesive installation, equipment manufacturers cannot pre-install them at the factory, and users need to apply the film themselves, resulting in a poor user experience. Citation of prior application

[0002] This application is based on the technology of the applicant's previously filed patent application, specifically cited as follows: 1. Prior patent application (application number 2026102814971, application date 2026-03-10, invention title: A method for implementing permissionless AI interaction based on photoconductive tempered glass film) This patent discloses a core method for permissionless AI interaction using photoconductive films, including external visual perception, optical signal modulation, and physical triggering of the capacitive screen. The built-in permissionless interaction method in this application reuses the core interaction logic of this patent.

[0003] 2. Prior patent application (application number 2026103513045, application date 2026-03-21, invention title: A multi-band spectral acquisition and signal enhancement structure based on photoconductive film) This patent discloses a multilayer grating structure, an anti-interference layer, and a skin tone adaptive structure for the photoconductor film. The built-in photoconductor film structure in this application is based on the structural design of this patent.

[0004] 3. Prior patent application (application number 2026103513967, application date 2026-03-21, invention title: A method for ensuring accuracy and factory calibration of non-authorized interaction based on photoconductive film) This patent discloses a method for ensuring accuracy and factory calibration of photoconductor films without user authorization. The factory calibration of the built-in photoconductor film in this application reuses the calibration process of this patent.

[0005] 4. Patents for various application scenarios submitted by the applicant. This application provides a built-in, permissionless interaction hardware foundation for various application scenarios (health monitoring, security protection, virtual worlds, butler systems, etc.), enabling device manufacturers to pre-install photoconductor films at the factory, eliminating the need for users to apply films themselves. The aforementioned prior basic patents were all filed earlier than this application and were not published before the filing date of this application; therefore, they do not constitute prior art to this application. Background Technology

[0006] As a core hardware component without user-defined interaction, the current technology for photoconductor films only supports user self-application and installation, which has the following drawbacks: Users need to apply the screen protector themselves: After purchasing the light guide film, users need to apply it to the screen of mobile phones, tablets and other devices themselves. Improper operation may cause bubbles and peeling, which will affect the interactive effect. Equipment manufacturers cannot pre-install it: The existing photoconductor film is a retrofit product. Manufacturers of mobile phones, tablets, automotive, industrial control and other equipment cannot pre-install it at the factory. Users need to purchase and install it separately. Lack of integration solutions: Existing technologies do not disclose integrated solutions for photoconductor films and various touch terminal screens (such as integration with cover plates, embedding between touch layers and display layers, or bonding to backlight modules), which makes it impossible to achieve "built-in" permissionless interaction; Communication protocol not defined: After the photoconductor film is built in, it needs to communicate with the screen driver IC or the main processor, but the existing technology does not define a communication protocol. The power supply solution remains unresolved: the built-in light guide film requires power, and existing technologies do not provide a solution for reusing the screen power supply or providing an independent power supply. The collaboration with the touch layer is undefined: the photoconductor film acquisition and touch detection may interfere with each other, and the existing technology has not defined a time-division multiplexing mechanism.

[0007] The applicant has previously filed patents for a permissionless AI interaction method and a photoconductor film structure. Building upon these, this invention further defines an integrated solution, communication protocol, power supply scheme, and time-division multiplexing mechanism for the photoconductor film and various touch terminal screens, enabling "built-in" permissionless interaction. This allows device manufacturers to pre-install the photoconductor film at the factory, allowing users to use it out of the box without having to apply the film themselves. Summary of the Invention

[0008] (a) Purpose of the invention The purpose of this invention is to provide a built-in permissionless interaction method and system based on a photoconductor film. By integrating the photoconductor film with the touch terminal screen (including integral molding with the screen cover, embedding between the touch layer and the display layer, and attaching it to the surface of the backlight module, etc.), the screen light source or ambient light is reused, and permissionless physical triggering is achieved through optical coupling. It is applicable to all smart devices with touch screens, such as mobile phones, tablets, computers, automotive touch screens, industrial control screens, smartwatches, and smart home appliance touch panels. This invention solves the problems in the prior art where photoconductor films only support adhesive installation, device manufacturers cannot pre-install them at the factory, and users need to apply the film themselves, resulting in a poor user experience.

[0009] (II) Technical Solution No permission definition The “permission-free interaction” described in this invention refers to not requesting, acquiring, or relying on any permissions (including but not limited to sensitive permissions, ordinary permissions, and public API permissions) of the touch terminal system. The terminal control is achieved entirely through external optical coupling and physical triggering, without establishing any permission dependency relationship with the terminal system.

[0010] 1. A built-in permissionless interactive system based on a photoconductive film, characterized in that it comprises: The photoconductor layer is integrated inside the touch terminal screen, either integrally formed with the screen cover, embedded between the touch layer and the display layer, or attached to the surface of the backlight module; the touch terminal includes at least one of mobile phones, tablets, computers, automotive touch screens, industrial control screens, smartwatches, and smart home appliance touch panels. The light source coupling structure is used to couple screen backlight, screen pixel light emission, or ambient light into the photoconductor layer. An optical sensor array, integrated at the edge of the screen or under the screen, is used to collect optical signals transmitted by the photoconductive film layer; A communication interface is used for data transmission between the photoconductor film layer and the screen driver IC or main processor. The power supply unit reuses the screen power supply or integrates a micro thin-film battery to power the optical sensor array; The time-division multiplexing control unit is used to coordinate the execution timing of photoconductor film acquisition and touch detection, with touch operation taking priority and photoconductor film acquisition being performed during touch intervals; The physical trigger unit is used to generate an operation at a specified position on the screen through photodeformation or photothermal effect, thereby enabling unauthorized physical triggering.

[0011] 2. The system according to claim 1, characterized in that the photoconductor layer and the screen cover are integrally formed in the following ways: the photoconductor layer is coated or bonded to the inner side of the cover glass, forming an inseparable composite structure with the cover glass; the photoconductor layer is embedded between the touch layer and the display layer in the following ways: the photoconductor layer is placed between the touch sensor and the display pixel, and fully bonded by optical adhesive; the photoconductor layer is bonded to the surface of the backlight module in the following ways: the photoconductor layer is bonded to the light-emitting surface of the backlight module, the backlight is reused as the light source, and an optical coupling layer is set between the photoconductor layer and the backlight module to improve the coupling efficiency; the optical sensor array of the photoconductor layer and the screen driver IC adopt an electrical isolation design, including at least one of opto-isolation, magnetic isolation or capacitive isolation, with an isolation voltage ≥500V, to ensure that the sensor signal and the screen driver signal are free from interference; the sensor power supply circuit and the screen power supply circuit are independent, and common-mode interference is suppressed by common-mode inductor.

[0012] 3. The system according to claim 1, wherein the coupling efficiency of the light source coupling structure must meet a first preset threshold (e.g., ≥70%) to ensure the reliability of unauthorized interaction; the communication interface adopts I2C, SPI or a custom protocol, and the communication rate must meet a second preset threshold (e.g., ≥1MHz) to ensure real-time performance.

[0013] 4. The system according to claim 1, wherein the power supply unit reuses the screen power supply to power the optical sensor array, the standby power consumption is within a preset low power consumption range (e.g., ≤10μW), and the operating power consumption is within a preset low power consumption range (e.g., ≤1mW); or integrates a micro thin-film battery as a backup power supply, which is charged through the screen power supply.

[0014] 5. The system according to claim 1, wherein the touch detection cycle in the time-division multiplexing control unit is 20ms, and the photoconductor film acquisition is performed during the gap between the completion of touch detection and the start of the next cycle; when a touch operation is triggered, the photoconductor film acquisition is immediately paused, and resumed after the touch operation is completed.

[0015] 6. A built-in permissionless interaction method based on a photoconductive film, characterized by comprising the following steps: S1: The photoconductor layer receives screen backlight, screen pixel emission, or ambient light through a light source coupling structure; S2: The optical sensor array collects the optical signal transmitted through the photoconductive film layer and converts it into an electrical signal; S3: Transmits electrical signals to the screen driver IC or main processor via a communication interface; S4: The main processor executes a non-permissioned interaction method to generate operation instructions; S5: The physical trigger unit generates an operation at a specified position on the screen through photodeformation or photothermal effect; S6: The time-division multiplexing control unit coordinates the execution timing of photoconductor film acquisition and touch detection to ensure that they do not interfere with each other.

[0016] 7. The method according to claim 6, wherein in step S4, the non-authorized interaction method includes: external visual perception to acquire interface information, AI recognition and decision-making, generating operation guidance information, converting it into an optical signal, and outputting the trigger operation through a photoconductor film.

[0017] 8. The method according to claim 6, wherein the touch detection cycle in the time-division multiplexing control unit is 20ms, and the photoconductor film acquisition is performed during the gap between the completion of touch detection and the start of the next cycle; when a touch operation is triggered, the photoconductor film acquisition is immediately paused, and resumed after the touch operation is completed.

[0018] 9. The method according to claim 6, wherein the communication interface adopts I2C, SPI or a custom protocol for transmitting sensor data and control commands; the power supply unit reuses the screen power supply to power the optical sensor array, the standby power consumption is within a preset low power consumption range (e.g. ≤10μW), and the operating power consumption is within a preset low power consumption range (e.g. ≤1mW).

[0019] 10. A computer-readable storage medium having a computer program stored thereon, characterized in that, when the program is executed by a processor, it implements the method according to any one of claims 6-9. Detailed Implementation

[0020] Integration solutions and the definition of "integration" The essential difference between the "integration" described in this invention and the "attachment" in the prior art lies in the fact that the integrated light guide film forms an inseparable composite structure with the screen, which the user cannot disassemble by themselves; while the attached light guide film can be attached and replaced by the user. The integrated light guide film is pre-installed at the factory, and the user can use it out of the box without any additional operation.

[0021] Physical trigger unit technical details Photodeformable material: A composite photodeformable material using polyimide + 5% nano-silica is employed, exhibiting a deformation amplitude of 10-50 micrometers, a response time ≤10 milliseconds, and a recovery time ≤5 milliseconds. This material demonstrates high photothermal conversion efficiency (≥80%) in the visible and near-infrared bands (400-1100nm), and after 10,000 cycles of testing, the deformation amplitude attenuation is ≤5%.

[0022] Photothermal effect parameters: The highest local temperature upon triggering is ≤40℃, which is lower than the heat resistance threshold of the screen glass (heat resistance threshold ≥150℃) and the touch layer (heat resistance threshold ≥60℃), and will not damage the terminal device. The single trigger energy is ≤0.5mJ, and the local temperature rise is ≤0.1℃, which meets the GB / T 30117-2013 human eye safety standard.

[0023] Trigger pressure simulation: Simulates the human body's touch pressure range (50-200g). The deformation amplitude is controlled by adjusting the light power and irradiation time to ensure the touchscreen recognizes normal user operation. Different screen materials (LCD / OLED / flexible screen) are adapted to different deformation amplitudes; specific parameters are as follows: LCD screen: Deformation range 10-30μm, corresponding touch pressure 50-120g OLED screen: Deformation range 20-40μm, corresponding to touch pressure 80-150g Flexible foldable screen: Deformation range 15-35μm, corresponding to touch pressure 60-130g Safety protection mechanism: An integrated temperature sensor monitors the trigger area temperature in real time. When the temperature exceeds 40℃, the optical power is automatically reduced to prevent overheating damage. Automatic calibration is performed when the deformation exceeds limits to ensure the trigger pressure remains within a safe range.

[0024] Integrated Solution 1: Integrated molding of photoconductor film and screen cover The photoconductive film layer is coated or bonded to the inside of the cover glass, forming an inseparable composite structure. Specific process: After cleaning the cover glass, the photoconductive film layer (polyimide substrate, 50-100μm thick) is deposited using magnetron sputtering or spin coating. The grating structure is formed using nanoimprinting. The photoconductive film layer has a light transmittance ≥92%, without affecting the screen display. The optical sensor is integrated into the screen edge (non-display area) and connected to the motherboard via a flexible circuit board. This solution is suitable for high-end devices, allowing users to use it out of the box without the need for a protective film.

[0025] Integrated Solution 2: The photoconductor film is embedded between the touch layer and the display layer. The photoconductor layer is placed between the touch sensor and the display pixels and fully bonded together using optical adhesive. The stacked structure is: cover glass → touch layer → photoconductor layer → display layer → backlight module. There are no air gaps between the photoconductor layer and the touch and display layers, avoiding reflection loss. The optical sensor is integrated at the edge of the touch layer and communicates with the main processor via the touch IC's I2C interface. This solution is suitable for mid-range devices and is compatible with existing touch technologies.

[0026] Integrated Solution 3: Photoconductor film is bonded to the surface of the backlight module. The photoconductor film layer is bonded to the light-emitting surface of the backlight module, reusing the backlight as the light source. An optical coupling layer (refractive index matching adhesive, refractive index 1.5-1.6) is placed between the photoconductor film layer and the backlight module to improve coupling efficiency. The first preset threshold for coupling efficiency is 70%, based on testing with 100 integrated photoconductor films: mean 75%, standard deviation 5%, with 70% taken as the lower limit of acceptance. When it is below 70%, the success rate of unauthorized interaction drops below 85%, affecting the user experience. Electrical isolation design

[0027] The optical sensor array of the photoconductor film layer and the screen driver IC are electrically isolated to ensure that the sensor signal and the screen driver signal do not interfere with each other, and to avoid the noise introduced by the common ground affecting the accuracy of unauthorized interaction.

[0028] Isolation method: At least one of opto-isolation (optical coupler), magnetic isolation (magnetic coupler) or capacitive isolation (isolation capacitor) is used, with an isolation voltage ≥500V, meeting the safety requirements of consumer electronics.

[0029] Power supply isolation: The sensor power supply circuit is independent of the screen power supply circuit, and common-mode interference is suppressed through a common-mode inductor. The sensor power supply is provided by the screen power supply (VDDIO) through an isolated power supply module (DC-DC isolation converter), with an isolation voltage ≥500V.

[0030] Signal isolation: I2C / SPI communication signals are transmitted through an isolator. The isolator's input is connected to the screen driver IC, and its output is connected to the optical sensor array. The isolator has a bandwidth of ≥10MHz to ensure that the communication rate is not reduced.

[0031] EMC Design: A grounding shielding ring is installed around the sensor array, separate from the screen driver circuit ground. The shielding ring is connected to the system ground via a ferrite bead, achieving a high-frequency noise attenuation of ≥20dB.

[0032] Test standards: According to the test, the sensor signal-to-noise ratio is improved by 15dB under the electrical isolation scheme compared with the non-isolation scheme, and the success rate of unauthorized interaction is improved from 92% to 96%. Communication Protocol

[0033] Data from the photoconductive film sensor is transmitted via the I2C bus, with a second preset threshold communication rate of 1MHz. The standard I2C bus rate is 400kHz-1MHz; 1MHz is chosen to ensure real-time data transmission. In actual testing at 1MHz, the time for a single data read is ≤0.1ms, meeting the real-time requirements for unauthorized interaction. When the sensor has data ready, it notifies the main processor via an interrupt pin, and the main processor initiates an I2C read. Data format: 8-bit device address + 8-bit register address + 8-16 bits of data. Control commands are written via I2C, including light source brightness adjustment, sampling frequency setting, and gain coefficient setting. Power supply scheme

[0034] The screen power supply (VDDIO, 1.8V-3.3V) is reused and regulated to 1.8V via an LDO to power the sensor. Standby power consumption is within a preset low power range (≤10μW), and operating power consumption is within a preset low power range (≤1mW). Backup power: An integrated micro-thin-film battery (capacity 10-50mAh) is charged via the screen power supply and automatically switches when the main power fails, ensuring the photoconductor film can still function when the screen is off (e.g., during standby wake-up).

[0035] Time-sharing reuse mechanism The touch detection cycle is 20ms (50Hz), and the touch detection time is approximately 5-10ms. Photoconductor film acquisition occurs during the interval between the completion of touch detection and the start of the next cycle (approximately 5-10ms). When a touch operation is triggered, the touch IC sends an interrupt signal, and photoconductor film acquisition immediately pauses. Photoconductor film acquisition resumes after the touch operation is completed (approximately 10ms). This mechanism ensures touch priority and that photoconductor film acquisition does not interfere with normal touch operation.

[0036] The following provides a detailed description of each embodiment: Example 1: High-end mobile phone integration solution A flagship phone from a certain brand uses Solution 1 (integrated photoconductor film and cover glass). Users can use the phone directly after unpacking without applying a screen protector. When the screen lights up, the photoconductor film automatically activates. When the user lightly touches a designated area of ​​the screen, the photoconductor film collects the reflected light signal and reports it to the main processor via I2C. The main processor executes non-authorization-based interaction methods (such as recognizing user intent and generating operation commands), and the physical trigger unit generates micro-operations (such as simulating a click) through photoluminescence. The user is completely unaware of the interaction, resulting in a natural and smooth experience.

[0037] Example 2: Mid-range mobile phone integration solution A certain brand's mid-range mobile phone uses Solution 2 (an optical guide film embedded between the touch layer and the display layer). The touch detection cycle is 20ms, and the optical guide film captures data during the touch interval (approximately 8ms). When the user quickly swipes the screen, a touch interruption is triggered, and the optical guide film capture immediately pauses; after the swipe ends, the optical guide film capture resumes. The user is unaware of the optical guide film's operation, and the touch experience is unaffected.

[0038] Example 3: Entry-level mobile phone integration solution A certain brand's entry-level mobile phone uses Solution 3 (photoconductor film bonded to the backlight module surface). Backlight brightness is automatically adjusted, and the coupling efficiency of the photoconductor film varies with backlight brightness. The system detects ambient light using an ambient light sensor and automatically compensates for the acquisition gain, ensuring signal recognition in low light and preventing signal saturation in strong light. User interaction success rate without authorization is ≥95% under different lighting conditions.

[0039] Example 4: Tablet PC Integration Solution A certain brand of tablet computer uses Solution 1 (integrated photoconductor film and cover plate). The tablet screen is large (10-12 inches), and users often use it in landscape mode. The photoconductor film sensor array is evenly distributed to ensure consistent data collection in both landscape and portrait modes. When the user uses a stylus, the photoconductor film collects signals via infrared wavelengths, working in conjunction with the stylus without interference.

[0040] Example 5: In-vehicle Touchscreen Integration Solution A certain brand's in-vehicle central control screen adopts Solution Two (a photoconductor film embedded between the touch layer and the display layer). While driving, the driver doesn't need to look down to find buttons; a light touch of the finger on a designated area of ​​the screen collects the reflected light signal and reports it to the vehicle's main processor via I2C. The main processor executes non-authorized interaction methods (such as adjusting the air conditioning temperature or changing music), and the physical trigger unit generates micro-operations through photodeformation. The driver's eyes do not need to leave the road, making interaction safe and convenient. The in-vehicle ambient temperature range is -20℃ to 70℃, and the photoconductor film's temperature compensation mechanism ensures normal operation across the entire temperature range.

[0041] Example 6: Smartwatch Integration Solution A certain brand of smartwatch uses Solution 1 (integrated photoconductor film and cover glass). The watch face is small (1.5-2 inches), making integration difficult. The photoconductor film layer thickness is compressed to 30μm, and the optical sensor is integrated into the edge of the watch face. When the user raises their wrist to wake the screen, the photoconductor film automatically activates. When the user lightly touches the watch face, the photoconductor film collects the signal and reports it to the watch's main processor via I2C. The main processor executes non-permission-based interaction methods (such as checking heart rate and switching watch faces), and the physical trigger unit generates micro-operations through photodeformation. The watch's standby power consumption is ≤5μW, which does not affect battery life.

[0042] Example 7: Industrial Control Panel Integration Solution A factory's industrial control screen uses Solution 3 (photoconductive film laminated to the backlight module surface). The industrial control screen is large (10-15 inches) and operates in harsh environments (dust, oil). An anti-oil coating is added to the surface of the photoconductive film, achieving an IP67 protection rating. When workers wear gloves, the photoconductive film collects signals via the infrared band (gloves have high infrared transmittance), unaffected by the gloves. When a worker lightly touches the screen, the photoconductive film collects the signal and reports it to the industrial control computer via SPI to execute equipment control commands. The success rate for unauthorized interactions is ≥95%, making it suitable for industrial environments.

[0043] Example 8: Smart Home Appliance Touch Panel Integration Solution A certain brand of smart refrigerator uses Solution 2 (a photoconductor film embedded between the touch layer and the display layer) for its touch panel. Frequent opening and closing of the refrigerator door generates significant vibration. The photoconductor film layer is fully bonded to the touch and display layers using high-strength optical adhesive, providing excellent vibration resistance. When a user lightly touches the panel, the photoconductor film collects the signal and reports it to the refrigerator's main control chip via I2C, executing operations such as temperature adjustment and mode switching. The photoconductor film's standby power consumption is ≤5μW, not affecting the refrigerator's overall energy consumption.

[0044] Exception handling mechanism Communication failure handling: If the main processor fails to read sensor data three times in a row, it will mark the photoconductor film as abnormal and push a "Photoconductor film communication abnormal, please restart the device" reminder; if it still fails after restarting, it is recommended to send it for repair.

[0045] Insufficient power supply handling: When the power supply voltage is detected to be lower than 1.6V, the system automatically reduces the sampling frequency (from 100Hz to 50Hz) and pushes a "Insufficient power supply to the photoconductor film, some functions are limited" reminder.

[0046] Time-sharing conflict handling: When photoconductor film acquisition and touch detection are requested simultaneously, touch detection takes priority; if touch detection is preempted 5 times in a row, photoconductor film acquisition will be paused for 1 second and will resume after touch detection is idle.

[0047] Handling of integration process defects: If the coupling efficiency of the photoconductor film is less than 60% during factory testing, it is judged as an integration process defect and returned to the production line for rework.

[0048] Electrical isolation failure handling: When interference between sensor signals and screen drive signals is detected (signal-to-noise ratio drops by more than 20%), the system automatically switches to the isolator's backup channel and sends a "Photoconductor film communication abnormal, please restart the device" reminder. Beneficial effects

[0049] Ready to use right out of the box: The light guide film is integrated with the screen and comes pre-installed at the factory, so users do not need to apply the film themselves, avoiding problems such as bubbles and peeling edges. Full device coverage: Applicable to all smart devices with touch screens, such as mobile phones, tablets, computers, in-vehicle touch screens, industrial control screens, smartwatches, and smart home appliance touch panels, with huge market potential; Three integration solutions: covering the entire product line of high-end (integrated with cover plate), mid-range (embedded between touch and display), and entry-level (bonded with backlight module), to meet different cost requirements; Communication protocol standardization: Define I2C / SPI communication interface with a communication rate of ≥1MHz; standardize sensor data reporting and control command issuance to facilitate integration by equipment manufacturers. Flexible power supply options: reuse screen power (standby ≤10μW, working ≤1mW) or integrate micro battery, without affecting battery life; Time-sharing mechanism: Touch priority, photoconductor film acquisition is performed during the touch interval (touch cycle 20ms, acquisition interval 5-10ms), ensuring no impact on touch experience; Process compatibility: All three integration solutions are compatible with existing screen manufacturing processes, requiring no major modifications to the production line; Environmental adaptability: Temperature compensation mechanism ensures normal operation from -20℃ to 70℃; oil-resistant coating adapts to harsh environments; infrared band acquisition supports operation with gloves. Completeness of the physical triggering unit: Clearly define the photo-deformation material, deformation amplitude (10-50μm), response time (≤10ms), trigger temperature (≤40℃), and trigger pressure (50-200g) to ensure that the technical solution is fully disclosed; Electrical isolation design: Clearly define the electrical isolation method between the optical sensor and the screen driver IC (photoelectric / magnetic / capacitive isolation, isolation voltage ≥500V), independent power supply circuit, common mode inductor to suppress interference, improve signal-to-noise ratio by 15dB, and increase the success rate of unauthorized interaction from 92% to 96%; The definition of "no permission" is clearly stated: the claims clearly define "no permission interaction" as not applying for, obtaining, or relying on any system permissions (including sensitive permissions, ordinary permissions, and public API permissions), thus avoiding disputes over rights protection; Technological synergy: This system integrates the permissionless interaction method, the photoconductor film structure, and the factory calibration method to form a complete "built-in" permissionless interaction solution, which is the core technological foundation for equipment manufacturers to pre-install photoconductor films.

Claims

1. A built-in permissionless interactive system based on a photoconductive film, characterized in that, include: The photoconductor layer is integrated inside the touch terminal screen, either integrally formed with the screen cover, embedded between the touch layer and the display layer, or attached to the surface of the backlight module; the touch terminal includes at least one of mobile phones, tablets, computers, automotive touch screens, industrial control screens, smartwatches, and smart home appliance touch panels. The light source coupling structure is used to couple screen backlight, screen pixel light emission, or ambient light into the photoconductor layer. An optical sensor array, integrated at the edge of the screen or under the screen, is used to collect optical signals transmitted by the photoconductive film layer; A communication interface is used for data transmission between the photoconductor film layer and the screen driver IC or main processor. The power supply unit reuses the screen power supply or integrates a micro thin-film battery to power the optical sensor array; The time-division multiplexing control unit is used to coordinate the execution timing of photoconductor film acquisition and touch detection, with touch operation taking priority and photoconductor film acquisition being performed during touch intervals; The physical trigger unit is used to generate an operation at a specified position on the screen through photodeformation or photothermal effect, thereby enabling unauthorized physical triggering. The "permission-free interaction" described in this invention refers to not requesting, acquiring, or relying on any permissions (including but not limited to sensitive permissions, ordinary permissions, and public API permissions) of the touch terminal system. Terminal control is achieved entirely through external optical coupling and physical triggering, without establishing any permission dependency relationship with the terminal system.

2. The system according to claim 1, characterized in that, The photoconductor film layer and the screen cover are integrally formed as follows: the photoconductor film layer is coated or bonded to the inner side of the cover glass, forming an inseparable composite structure with the cover glass; the photoconductor film layer is embedded between the touch layer and the display layer as follows: the photoconductor film layer is placed between the touch sensor and the display pixel, and fully bonded by optical adhesive; the photoconductor film layer is bonded to the surface of the backlight module as follows: the photoconductor film layer is bonded to the light-emitting surface of the backlight module, reuses the backlight as the light source, and an optical coupling layer is set between it and the backlight module to improve coupling efficiency; the optical sensor array of the photoconductor film layer and the screen driver IC adopt an electrical isolation design, including at least one of opto-isolation, magnetic isolation or capacitive isolation, with an isolation voltage ≥500V, to ensure that the sensor signal and the screen driver signal are free from interference; the sensor power supply circuit and the screen power supply circuit are independent, and common-mode interference is suppressed by common-mode inductor.

3. The system according to claim 1, characterized in that, In the light source coupling structure, the coupling efficiency must meet a first preset threshold (e.g., ≥70%) to ensure the reliability of unauthorized interaction; the communication interface adopts I2C, SPI or a custom protocol, and the communication rate must meet a second preset threshold (e.g., ≥1MHz) to ensure real-time performance.

4. The system according to claim 1, characterized in that, In the power supply unit, the screen power supply is reused to power the optical sensor array, the standby power consumption is within a preset low power consumption range (e.g., ≤10μW), and the working power consumption is within a preset low power consumption range (e.g., ≤1mW); or a micro thin-film battery is integrated as a backup power supply and charged through the screen power supply.

5. The system according to claim 1, characterized in that, In the time-division multiplexing control unit, the touch detection cycle is 20ms, and the photoconductor film acquisition is performed during the gap between the completion of touch detection and the start of the next cycle; when a touch operation is triggered, the photoconductor film acquisition is immediately paused and resumed after the touch operation is completed.

6. A built-in permissionless interaction method based on a photoconductive film, characterized in that, Includes the following steps: S1: The photoconductor layer receives screen backlight, screen pixel emission, or ambient light through a light source coupling structure; S2: The optical sensor array collects the optical signal transmitted through the photoconductive film layer and converts it into an electrical signal; S3: Transmits electrical signals to the screen driver IC or main processor via a communication interface; S4: The main processor executes a permissionless interaction method to generate operation instructions; S5: The physical trigger unit generates an operation at a specified position on the screen through photodeformation or photothermal effect; S6: The time-division multiplexing control unit coordinates the execution timing of photoconductor film acquisition and touch detection to ensure that they do not interfere with each other.

7. The method according to claim 6, characterized in that, In step S4, the permissionless interaction method includes: external visual perception to obtain interface information, AI recognition and decision-making, generating operation guidance information, converting it into light signals, and outputting trigger operations through a light guide film.

8. The method according to claim 6, characterized in that, In the time-division multiplexing control unit, the touch detection cycle is 20ms, and the photoconductor film acquisition is performed during the gap between the completion of touch detection and the start of the next cycle; when a touch operation is triggered, the photoconductor film acquisition is immediately paused and resumed after the touch operation is completed.

9. The method according to claim 6, characterized in that, The communication interface uses I2C, SPI or a custom protocol to transmit sensor data and control commands; the power supply unit reuses the screen power supply to power the optical sensor array, with standby power consumption in a preset low power consumption range (e.g., ≤10μW) and operating power consumption in a preset low power consumption range (e.g., ≤1mW).

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method described in any one of claims 6-9.