An eye ball non-computing positioning touch method and system based on light guide film partition optical coding

Abstract

The application discloses an eye non-computing positioning touch method and system based on light guide film partition optical coding, and relates to the field of intelligent terminal optical interaction. The light guide film is a pure optical passive structure without a chip, a circuit, a power supply, and an electrical connection with a terminal. The film surface is pre-fabricated with a stealth optical partition with a micro-nano grating, each partition has a unique optical code and forms a hardware mapping table with a screen coordinate. Eye fixation causes a fixed angle and a light intensity peak signal in the corresponding partition, without AI computing and image recognition, the coordinate can be directly output, and the hardware weight distribution is realized through light intensity ratio interpolation in the overlapping area. The system can analyze the eye fixation selection, blinking click, and eye sliding instruction, and trigger a capacitance screen through light-induced micro-deformation pure physics, without applying for system permission and accessing API in the whole process. The application realizes zero delay, no ambient light interference, and full platform compatibility, and has a simple structure, low cost, and easy mass production, and is suitable for full-scene eye non-contact touch in mobile phones, vehicles, folding screens, industrial control, and the like.

Description

Technical Field

[0001] This invention relates to the fields of optical interaction for smart terminals, eye-tracking touch control, hardware positioning without computation, and touch control without permissions. Specifically, it relates to a pure hardware implementation scheme that achieves direct eye-tracking positioning through built-in partitioned optical coding in a light guide film, and completes eye-tracking touch control without AI algorithms or image calculations. Background Technology

[0002] Existing eye-tracking and gaze control solutions generally rely on front-facing camera image acquisition, infrared illumination, iris / pupil feature recognition, and AI gaze fitting algorithms to achieve screen coordinate positioning, which has the following core drawbacks: 1. It relies on image recognition and algorithm calculation, resulting in high instruction latency, high power consumption, and susceptibility to failure under low light / strong light / ambient stray light conditions; 2. It requires complex hardware such as sensors, infrared light sources, and processing chips, resulting in high costs, complex structures, and limited compatibility; 3. Some solutions require obtaining system permissions and accessing underlying APIs, which may lead to privacy leaks, system bans, and poor cross-platform compatibility. 4. Pure optical interactive films only achieve simple light transmission and do not have eye positioning and command interpretation capabilities, so they cannot achieve direct eye-tracking control of the screen; 5. Positioning accuracy drops significantly in scenarios such as strabismus, lying down, prone vision, astigmatism, and eyeglass reflection, resulting in a poor user experience.

[0003] Currently, the industry lacks a minimalist eye-touch solution that is completely sensorless, infrared illumination-free, AI computing-free, and image recognition-free, and can achieve precise eye positioning, zero-delay command triggering, full ambient light adaptation, and compatibility with all user groups solely through a pure optical film structure. Summary of the Invention

[0004] I. Technical problems to be solved This invention addresses the shortcomings of existing technologies by providing a computationally-free eye-based positioning touch control method and system based on optical coding of photoconductive film partitions, aiming to solve the following problems: 1. Eliminate complex modules such as cameras, infrared illumination, sensors, AI computing, and image recognition required for eye-tracking interaction, achieving extreme hardware simplification; 2. Enables direct output of eye gaze position coordinates via hardware, eliminating the need for software calculations, achieving zero latency, and providing response speed equivalent to finger touch control; 3. Completely eliminates interference from ambient light, diffused light, shadows, angles, and reflections, ensuring stable positioning across all scenes; 4. Implement pure hardware parsing of complete touch commands such as gaze-based selection, rapid blink-based clicking, and eye-swipe page turning / dragging; 5. Maintains the pure optical passive characteristics of having no chips, no circuits, no power supply, no electrical connection, and no system permissions, and is compatible with all platforms. Technical solution

[0005] 1. A computationally-free eye-based touch control method based on optical coding of light-conducting film zones Includes the following steps: S1: A light guide film with a pure optical structure is attached to the surface of a capacitive touch terminal. The light guide film has no chip, no circuit, no power supply, and no electrical connection with the terminal. The surface of the film is divided into several invisible optical zones according to the touch coordinate area. The boundaries of the zones are set with overlapping and gradual transition areas. Each zone has a unique fixed optical code pre-made by a mold. The optical code is implemented using micro-nano gratings with different periods or different orientations. The code and the screen coordinates form a hardware optical mapping table, which is part of the film structure itself and does not depend on any CPU, logic gate, software or algorithm. S2: Screen light or ambient light passes through the light guide film and enters the user's eyeball. When the eyeball focuses on a certain section or overlapping sections, a unique reflected light signal with a fixed angle and light intensity peak is generated at the corresponding position. This signal is uniquely determined by the section grating structure and is independent of the type of ambient light. S3: The photoconductive film directly converts light change signals into screen gaze coordinates through a pre-defined mapping relationship between optical encoding and coordinates, without the need for AI calculation, image recognition, or algorithm fitting; the overlapping gradient area directly interpolates coordinates to achieve hardware weight allocation through light intensity ratio, that is, if the light intensity ratio of the two zones A:B=7:3, the coordinates fall at a position 30% away from zone A and 70% away from zone B, directly output by the optical properties of the film layer, without the need for software calculation; S4: Analyze touch commands based on light change characteristics: stable light change in a single zone corresponds to gaze selection; rapid light change in a fixed area corresponds to click / confirm; continuous light change when the eye moves across multiple zones corresponds to swipe / page turning / drag, and the swipe distance is positively correlated with the number of zones swipeped. S5: The photoconductive film triggers the capacitive touchscreen in a purely physical way at the target coordinate position through photoinduced micro-deformation, photothermal effect micro-deformation, or local electric field change. It does not request system permissions, read system data, or access underlying APIs throughout the process, thus completing eye-tracking without computation.

[0006] 2. An eye-tracking touch control system based on optical coding of light guide film without computational positioning include: • Pure optical light guide film body: using tempered substrate or flexible optical substrate, without chips, circuits, or power supply, with pre-made invisible optical partitions and micro-nano grating optical codes on the film surface, and the codes and screen coordinates forming a hardware optical mapping table. • Zoned light signal detection module: used to capture zoned fixed angle and light intensity peak signals caused by eye fixation, without collecting eye biological characteristics; • Hardware coordinate mapping module: Built-in partition coding-coordinate correspondence, which is the optical structure of the membrane itself, directly outputs the gaze position without algorithm calculation; • Touch command parsing module: Based on the stability, speed, and continuity of light changes, it identifies selection, click, and swipe commands in hardware. • Pure physical triggering module: The capacitive screen is triggered by photo-induced deformation / photothermal micro-deformation / local electric field change, and there is no electrical connection with the terminal.

[0007] III. Technical Feature Limitations 1. Pre-fabricated partitioned coding: The optical coding is formed in one step during the mold manufacturing stage, using a micro-nano grating structure. It is unmodifiable, requires no calibration, and can be used immediately after applying the film; 2. No computational positioning: Coordinates are directly output from the membrane structure, requiring no CPU computation, no logic gates, no software involvement, and zero latency; 3. Overlapping Boundary Weighting: Hardware weighting is achieved by interpolating the light intensity ratio in the overlapping areas of adjacent partitions, automatically outputting the optimal coordinates, and eliminating boundary jumps; 4. Full environmental compatibility: It only recognizes the raster-coded light signals of the partition itself, and is not affected by sunlight, lamplight, shadows, angle, or astigmatism; 5. Passive and permissionless: Completely passive, no electrical connection, independent of the system, and compatible with all platforms. Beneficial effects

[0008] 1. Extremely simple structure: no sensors, no infrared, no AI, no algorithms, no chips, no power supply, and the cost is close to that of ordinary tempered glass screen protectors; 2. Zero-latency experience: The hardware directly outputs coordinates, with a response speed consistent with finger touch, and no calculation delay; 3. Stable in all environments: Unaffected by ambient light, angle, shadows, astigmatism, or eyeglass reflections, ensuring accurate and reliable positioning; 4. High privacy with no permissions: It does not collect eye biometrics, read system data, or request permissions, ensuring privacy and security; 5. Full-size and multi-platform compatibility: Adapts to mobile phones, tablets, automotive, industrial control, wearables, and ultra-large screens; compatible with Android / iOS / Windows / MacOS / HarmonyOS. 6. Easy to mass produce and deploy: Standardized mold production, ready to use after applying the film, no need to modify equipment or install software. Detailed Implementation

[0009] Example 1: Full-screen eye-tracking touch control on a smartphone (6.5 inches) The photoconductive tempered glass film of this invention is attached to the surface of a 6.5-inch smartphone capacitive screen. The film is divided into several invisible optical zones according to the screen coordinates. Each zone has a micro-nano grating optical code pre-made by a mold, and adjacent zones are provided with overlapping gradient boundaries.

[0010] When a user gazes at an app icon in the center of the screen, the corresponding area generates a fixed angle and peak light intensity signal. The photoconductor film directly outputs the coordinates of this position through encoding-coordinate mapping, achieving gaze-based selection without calculation. If the user blinks rapidly at the same location, causing a rapid change in the light signal in the fixed area, the system interprets this as a click / confirmation. The photoconductor film then undergoes photoinduced micro-deformation at that coordinate, physically triggering the capacitive screen to open the app. If the user's eye quickly swipes across consecutive sections from top to bottom on the screen, the system determines the swipe distance based on the number of sections swiped across and executes an up / down swipe / page turn.

[0011] It operates without sensors, algorithms, permissions, or latency, and maintains stable positioning in direct sunlight, nighttime lighting, at an angle, and while lying down.

[0012] Example 2: Eye-tracking control via a curved in-vehicle central control screen (12.3 inches) The flexible light guide film of this invention is attached to a 12.3-inch curved in-vehicle touchscreen. The film adapts to the curved surface shape, with partitions evenly distributed along the curved surface, and the grating encoding remains stable under bending conditions.

[0013] While the vehicle is in motion, the driver's gaze at the volume adjustment area allows the diaphragm to directly output coordinates for selection; a quick blink activates / deactivates the volume; and swiping the eye left or right across the zones allows for song switching and menu navigation. In environments with vehicle bumps, strong light, low light at night, or high humidity, the system only recognizes fixed grating-coded signals for each zone, remaining unaffected by environmental interference and exhibiting zero drift and zero delay in positioning.

[0014] The photoconductive film has no power source or circuitry and has no electrical connection with the vehicle screen. It does not affect the original vehicle's safety or touch functionality and meets the requirements for stable interaction at the automotive level.

[0015] Example 3: Eye-tracking interaction on foldable screen phones (7.6-8.0 inches) The flexible photoconductive film of this invention is attached to a 7.6-inch foldable screen phone. The folded state and the unfolded state correspond to two sets of partitioned coding mapping relationships, and the grating coding and coordinate mapping remain unchanged when the film is bent.

[0016] In folded mode (outer screen), the smaller partitions automatically adapt, allowing users to view messages and perform quick operations by looking up, blinking, or swiping a short distance. In unfolded mode (inner screen), the larger partitions take effect, supporting full commands such as eye-swipe browsing, eye-zoom zoom, and eye-drag.

[0017] The light guide film automatically matches the corresponding coordinates through its built-in coding during the folding / unfolding switch, requiring no calibration, calculation, or delay, and the positioning accuracy remains unchanged after repeated bending.

[0018] Example 4: Encoding Structure and Weight Allocation Example The optical partitions on the surface of the photoconductive film are encoded using micro / nano gratings of different periods: • Top left corner section: 300nm periodic grating • Upper-middle section: 400nm periodic grating • Top right corner section: 500nm periodic grating Different periodic gratings reflect light at different angles and with different light intensity peaks, making the optical signals distinguishable and directly correspond to coordinates.

[0019] When the eye focuses on the overlapping gradient area of ​​the two sections: • Zone A accounts for 70% of the light intensity. • Zone B accounts for 30% of the light intensity. The coordinates will then automatically fall into the interpolation position of A:B=7:3. This process is directly completed by the optical properties of the film layer without any calculation.

Claims

1. A computationally-free eye-based positioning touch control method based on optical coding of a light guide film, characterized in that, include: A pure optical light guide film is attached to the surface of a capacitive touch terminal. The light guide film has no chip, no circuit, no power supply, and no electrical connection with the terminal. The film surface is divided into several invisible optical zones according to the screen coordinates. The boundaries of the zones are set with overlapping gradient areas. Each zone has a micro-nano grating optical code with different periods or different orientations pre-made by the mold. The code and the screen coordinates form a hardware optical mapping table. Screen light or ambient light passes through the light guide film and enters the eyeball. When the eyeball looks at the eye, the corresponding zone generates a reflected light signal with a unique fixed angle and light intensity peak. The light guide film directly outputs the gaze coordinates in hardware according to the zone code, without the need for CPU, logic gates, software or image recognition. Overlapping partitions achieve hardware weight allocation by directly interpolating coordinates using light intensity ratios. By analyzing touch commands using optical signal characteristics, and physically triggering the capacitive screen with photo-induced micro-deformation or photothermal effects, eye-tracking touch with zero permissions, zero computation, and zero latency is achieved.

2. The method according to claim 1, characterized in that, The hardware weight allocation is as follows: the ratio of reflected light intensity of the two partitions in the overlapping area directly determines the coordinate position. If the light intensity ratio A:B=7:3, the coordinates fall at a position 30% away from partition A and 70% away from partition B. This is directly output by the optical properties of the film layer and does not require software calculation.

3. The method according to claim 1, characterized in that, Touch commands include: stable light changes in a zone indicate gaze selection; rapid light changes in a fixed area indicate tapping / confirming; and continuous eye movement across a zone indicates swiping / page turning, with the swipe distance being positively correlated with the number of zones swiped.

4. The method according to claim 1, characterized in that, The optical code is pre-fabricated in the mold for manufacturing the photoconductor film in one go, and no calibration or update is required after the film is applied.

5. The method according to claim 1, characterized in that, The positioning system only identifies the raster-coded light signal of the partition itself and is not affected by ambient light, shadows, angles, astigmatism, or reflections.

6. The method according to claim 1, characterized in that, The entire process does not request system permissions, read terminal data, access APIs, or establish communication connections.

7. A computationally-free eye-tracking touch system based on optical coding with a light guide film partition, characterized in that, include: Pure optical light guide film, without chips, circuits, or power supply. The film surface is pre-fabricated with invisible partitions with micro-nano grating optical codes, and the codes form a hardware-based optical mapping table with screen coordinates. The partitioned light signal detection module is used to capture the partitioned fixed angle and light intensity peak signal caused by gaze. The hardware coordinate mapping module directly outputs gaze coordinates based on optical encoding, without algorithm calculation. The touch command parsing module enables hardware recognition of selection, click, and swipe commands; The purely physical triggering module triggers the capacitive screen through photo-induced micro-deformation or photothermal effect.

8. The system according to claim 7, characterized in that, The photoconductor film is made of tempered glass or flexible optical substrate, and is suitable for flat, curved, foldable and flexible screens.

9. The system according to claim 7, characterized in that, The system is compatible with terminals ranging from 3.5 inches to 100 inches and supports Android, iOS, Windows, macOS, and HarmonyOS operating systems.

10. The system according to claim 7, characterized in that, The system requires no power supply, no sensors, no infrared illumination, and no AI processor, making it a purely hardware-based passive positioning system.