A non-contact eye tracking device, control input system and method

Abstract

The application provides a non-contact eye movement tracking device, a control input system and a method, and belongs to the technical field of visual tracking. The device comprises a sensing interface array and a wearing device, the sensing interface array is attached to the wearing device, the sensing interface array comprises sensing electrodes and a transparent support layer, the sensing electrodes are attached to the transparent support layer, the sensing electrodes are covered with dielectric material, the surface of the dielectric material can maintain static electricity and generate an electric signal when the eye movement is performed. The device uses a transparent sensing interface array placed in front of the eyes, generates mutual induction with the fluctuation movement of the skin around the eyes in the form of a space electric field when the eyes move, and couples and decodes the multiple signals generated by the mutual induction, so that accurate identification of blinking and eyeball rotation is realized, and a mouse input system controlled by eye movement is formed.

Description

Technical Field

[0001] This invention relates to the field of visual tracking technology, and more particularly to an eye-tracking method and apparatus, especially a non-contact eye-tracking device composed of an array of sensing interfaces that maintains static electricity. Background Technology

[0002] Eye-tracking technology can provide crucial information about human visual behavior and thought processes by decoding eye movements such as eye rotation, gaze, and blinking, and has already been applied in important fields such as medicine, business, and engineering. For example, eye-tracking technology is used to assist in solving problems related to cognitive rehabilitation, human-computer interaction for ALS patients, consumer business preference assessment, and virtual reality control technology. Therefore, the continuous development of eye-tracking technology is particularly important for medical testing and treatment, human-computer interaction improvement, and business analytics.

[0003] Current eye-tracking technologies mainly include those based on magnetic fields, MRI, optical capture, and electrooculography (EOG) signals. However, magnetic field-based technologies require invasive coils to be worn inside the eye; MRI eye-tracking technology requires bulky MRI equipment; optical tracking methods (such as the laser-based visual feedback eye-tracking interaction method and system disclosed in CN113963416A) can achieve high-precision eye tracking, but require complex computational analysis; and EOG tracking methods require contact electrodes (such as a muscle micro-motion detection element disclosed in CN109077730A), which can easily lead to skin infections. Therefore, further exploration of new eye-tracking technologies is still needed.

[0004] Meanwhile, for non-contact eye-tracking technology, existing technology CN103677221A discloses an eye-controlled communication system that can detect user eye movements (left-right eye movement, blinking, or fixation) through an eye-control module and correspond to relevant control commands. However, this existing technology only proposes a concept and does not elaborate on how to use the eye-control module to perform command control, making it difficult to implement. In addition, how to accurately capture such subtle eye movements is also a problem that this invention attempts to solve. Summary of the Invention

[0005] To address the aforementioned issues, this invention presents a non-contact eye-tracking device based on a sensor interface array that maintains electrostatic charge. This device uses a transparent sensor interface array placed in front of the eye to generate mutual induction with the undulating movements of the skin around the eye during eye movements through a spatial electric field. The resulting multi-channel signals are coupled and decoded to achieve accurate recognition of blinks and eye movements.

[0006] This invention provides a non-contact eye-tracking device, comprising:

[0007] Sensor interface arrays and wearable devices,

[0008] The sensor interface array is disposed on the wearable device;

[0009] The sensing interface array includes a sensing electrode, a transparent support layer, and a dielectric material layer. The sensing electrode is attached to the transparent support layer, and the dielectric material layer is located on the surface of the sensing electrode.

[0010] The surface of the dielectric material layer can maintain static charge and generate electrical signals during eye movements.

[0011] Preferably, the dielectric material is charged on its surface by high-voltage polarization, and the thickness ranges from 3μm to 100μm. The high-voltage polarization is achieved by using a high-voltage polarizer or an antistatic gun.

[0012] The dielectric material layer is selected from one or more of the following materials: polytetrafluoroethylene, perfluoroethylene-propylene copolymer, polydimethylsiloxane, polyimide, aniline-formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide, melamine-formaldehyde, polyethylene glycol succinate, cellulose, cellulose acetate, polyethylene adipate, diallyl phthalate, styrene-propylene copolymer, styrene-butadiene copolymer, synthetic fiber, polymethyl methacrylate, polyvinyl alcohol, polyester, polyisobutylene, polyethylene terephthalate, polyvinyl butyral, natural rubber, polyacrylonitrile, polyvinylidene chloride-co-acrylonitrile, polyvinylpropene carbonate, polystyrene, polymethyl methacrylate, polycarbonate, liquid crystal polymer, polychloroprene, polyacrylonitrile, polybisphenol carbonate, polyvinyl chloride ether, polyvinylidene chloride, polyethylene, polypropylene, polyvinyl chloride, titanium dioxide, barium titanate, calcium titanate.

[0013] Preferably, there are multiple sensing electrodes, evenly distributed in the blind area around the eyeball;

[0014] The sensing electrode is selected from one or more of the following materials: metal conductive thin film, indium tin oxide, PEDOT:PSS coating, metal nano coating, and conductive polymer coating.

[0015] Preferably, the thickness of the transparent support layer ranges from 10μm to 2000μm, and the transparent support layer is a transparent elastomer or a transparent film;

[0016] The transparent elastomer is selected from one or more of the following materials: polydimethylsiloxane, Ecofledx, polyurethane, and SEBS;

[0017] The transparent film is selected from one or more of the following materials: transparent polyethylene, polyvinyl chloride, polypropylene, and polymethyl methacrylate.

[0018] Preferably, the eye movements include: the number of blinks and the rotation of the eyeballs in different directions and at different angles;

[0019] The electrical signal includes: voltage signal, charge quantity or current quantity, and the change of the voltage signal includes amplitude change and waveform change.

[0020] Preferably, the wearing device is eyeglasses, which are goggles, sunshades, or prescription glasses.

[0021] This invention also discloses a non-contact eye-tracking control input system, comprising:

[0022] Non-contact eye-tracking devices are used to track eye movements and generate electrical signals;

[0023] An electrical signal processing device is used to perform a first correspondence between the electrical signal and the eye movement, and a second correspondence between the eye movement and the input command;

[0024] A signal receiving and executing device is used to receive the input command and execute the corresponding operation according to the input command.

[0025] Preferably, the non-contact eye-tracking device includes four sensing electrodes, which can generate four electrical signals, and the coupling effect of the four electrical signals is used to establish a first correspondence with the eye movements.

[0026] Preferably, the input command is a mouse command, and the second correspondence includes:

[0027] Two blinks correspond to one left mouse button click, three blinks correspond to one right mouse button click, and four blinks correspond to a double left mouse button click.

[0028] The eye movements in the four directions of up, down, left, and right correspond to the mouse movements in the four directions of up, down, left, and right, respectively.

[0029] This invention also discloses a non-contact eye-tracking control input method, comprising:

[0030] Using a contact-based eye-tracking device, electrical signals are generated based on the wearer's eye movements;

[0031] The electrical signal is first mapped to the eye movement, and the eye movement is second mapped to the input command;

[0032] To enable input of eye-tracking control commands.

[0033] Through the above technical solution, the present invention is based on the electrostatic induction mechanism. The spatial electric field generated by the non-contact sensing interface array interacts with the skin around the eyes during eye movements. Different types of electrical signals can be generated according to different eye movements without contacting the skin, thus realizing non-contact eye tracking technology.

[0034] Meanwhile, the present invention can generate multiple electrical signals by sensing the state of the skin around the eyes under different eye movements through multiple sensing electrodes, which can decode eye movements more accurately, realize the precise capture of subtle eye movements, and the precise monitoring and tracking of eye movements.

[0035] Finally, this invention refines and clarifies the correspondence between electrical signals and eye movements, and between eye movement signals and input commands. It can accurately convert different types of eye movements into input commands, thereby forming an eye-tracking controlled mouse input system. This enables eye-tracking controlled human-computer interaction for ALS patients and can also be applied to fields such as business preference analysis and eye-tracking control input systems.

[0036] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0037] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0038] Figure 1 This is a demonstration diagram of glasses being worn according to an embodiment of the present invention;

[0039] Figure 2 This is an exploded view of the components of the sensing interface array according to an embodiment of the present invention;

[0040] Figure 3 This is a diagram showing the arrangement of the sensor interface array around the eye according to an embodiment of the present invention.

[0041] Figure 4 This is a demonstration diagram of the sensor interface array when worn, according to an embodiment of the present invention.

[0042] Figure 5 This is a signal diagram of four channels during a single blink, according to an embodiment of the present invention.

[0043] Figure 6 This is a signal diagram of four channels during two blinks according to an embodiment of the present invention;

[0044] Figure 7 This is a signal diagram of four channels during eye movement according to an embodiment of the present invention;

[0045] Figure 8 This is a diagram showing the correspondence between blinking actions and mouse signals according to an embodiment of the present invention;

[0046] Figure 9 This is a diagram showing the correspondence between eye movement and mouse signals according to an embodiment of the present invention;

[0047] Figure 10 This is a schematic diagram of a non-contact eye-tracking control input system according to an embodiment of the present invention;

[0048] Figure 11 This is a flowchart of a non-contact eye-tracking control input method according to an embodiment of the present invention.

[0049] Explanation of reference numerals in the attached figures

[0050] 1. Sensor interface array; 2. Wearer's glasses;

[0051] 10 Dielectric material that can retain static charge on the surface, 11 Sensing electrode, 12 Transparent support layer. Detailed Implementation

[0052] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0053] This invention provides a non-contact eye-tracking device based on the electrostatic induction mechanism. The device generates a spatial electric field through a non-contact device that interacts with the skin around the eyes during eye movements. Multiple electrostatic signals generated by the interaction of the skin around the eyes under different eye movement states are used to decode eye movement actions, thereby achieving accurate monitoring and tracking of eye movements.

[0054] An exploded view of the sensing interface array components of the non-contact eye-tracking device designed in this invention is shown below. Figure 1 As shown, the tracking device mainly includes a sensor interface array 1 and glasses 2. The sensor interface array 1 carries an electrostatic charge and is attached to the glasses 2. After being worn, the sensor interface array 1 is placed in front of the wearer's eyes with the help of the glasses 2. The glasses 2 can be goggles, sun visors, or prescription glasses, etc.

[0055] like Figure 2 As shown, the sensing interface array 1 includes: a dielectric material 10 with a surface capable of maintaining static charge, a sensing electrode 11, and a transparent support layer 12; wherein the dielectric material 10 covers the sensing electrode 11, and the sensing electrode 11 is attached to the transparent support layer 12.

[0056] According to one embodiment of the present invention, the dielectric material 10 can be charged by means of high voltage polarization, etc. Specifically, static charge can be injected into the surface of the dielectric material 10 by means of high voltage polarization instrument, antistatic gun and other equipment. The static charge can be positive charge or negative charge, both of which can achieve the same eye-tracking effect. The thickness of the dielectric material 10 can be 3-100μm.

[0057] According to one embodiment of the present invention, the dielectric material 10 can be an organic or inorganic dielectric material. Preferably, the dielectric material 10 can be one of the following materials: polytetrafluoroethylene, perfluoroethylene-propylene copolymer, polydimethylsiloxane, polyimide, aniline-formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide, melamine-formaldehyde, polyethylene glycol succinate, cellulose, cellulose acetate, polyethylene adipate, diallyl phthalate, styrene-propylene copolymer, styrene-butadiene... Polyolefin copolymers, synthetic fibers, polymethyl methacrylate, polyvinyl alcohol, polyester, polyisobutylene, polyethylene terephthalate, polyvinyl butyral, natural rubber, polyacrylonitrile, poly(vinylidene chloride-co-acrylonitrile), polyvinylpropene carbonate, polystyrene, polymethyl methacrylate, polycarbonate, liquid crystal polymers, polychloroprene, polyacrylonitrile, polybisphenol carbonate, polyvinyl chloride ether, polyvinylidene chloride, polyethylene, polypropylene, polyvinyl chloride, titanium dioxide, barium titanate, calcium titanate, etc.

[0058] According to one embodiment of the present invention, the sensing electrode 11 may be a metal conductive thin film, indium tin oxide, PEDOT:PSS coating, metal nano-coating, conductive polymer coating, etc.

[0059] According to one embodiment of the present invention, the thickness of the transparent support layer 12 is in the range of 10μm-2mm. Preferably, the transparent support layer 12 can be a transparent elastomer such as polydimethylsiloxane, Ecofledx, polyurethane, or SEBS; or it can be a transparent film such as transparent polyethylene, polyvinyl chloride, polypropylene, or polymethyl methacrylate.

[0060] According to one embodiment of the present invention, the dielectric material 10 and the sensing electrode 11 may be transparent, in which case their shape and distribution may be arbitrary;

[0061] Optionally, the dielectric material 10 and the sensing electrode 11 may also be opaque. In this case, the dielectric material 10 and the sensing electrode 11 are distributed in the blind area around the eyeball, and the inner circle size of the shape formed by the two is equivalent to the outer contour size of the eye when it is open. Preferably, the shape of the dielectric material 10 and the sensing electrode 11 may be a fan-shaped elliptical ring.

[0062] According to one embodiment of the present invention, the dielectric material 10 and the sensing electrode 11 are combined to form a unit structure of the sensing interface array 1. The number of unit structures can be one or more, which indicates the number of electrical signals that can be acquired. When there are multiple unit structures, they can have different distribution patterns. Multiple unit structures can be distributed on the same side or on different sides. For example, when there are two unit structures, they can be distributed one above and one below the eyeball, or two above or two below; when there are three unit structures, they can be one above and one below (one above means distributed directly above the eyeball, and two below means evenly distributed on both sides below the eyeball, and similar expressions in the context have the same meaning) or two above and one below, or three above or three below; when there are four unit structures, they can be one above and one below, two above and two below, or three above and one below, or four above or four below. More unit structures can also be evenly distributed around the eyeball according to this rule. It is worth noting that a higher number of unit structures is not necessarily better. While an increased number indicates the ability to collect more electrical signals and achieve higher accuracy in characterizing different eye movements, it also increases the complexity of the device, which is detrimental to actual manufacturing and quality stability. The preferred distribution implementation of this invention is as follows: Figure 3 The diagram shows a four-unit structure arranged in a top-bottom-three configuration, which allows for the acquisition of four electrical signals.

[0063] like Figure 4 As shown, after wearing, the dielectric material 10 with a static charge on its surface faces the eye. The static charge on the surface of the dielectric material 10 interacts with the naturally charged skin around the eye, generating a spatial electrostatic field. Due to electrostatic induction, when eye movements occur, the skin around the eye undulates differently in different areas, causing changes in the spatial electrostatic field. In order to restore electrostatic equilibrium between the skin and the dielectric material 10, the static charge flows between the sensing electrode 11 and the external circuit, thereby generating changes in the electrical signals (voltage signals, charge, or current) of each channel.

[0064] Then, the changes in electrical signals are correlated with the corresponding eye movements; this "correspondence" can also be called "decoding." Preferably, this embodiment selects to collect voltage signal changes from four channels. Since different eye movements cause different voltage signals in the four channels, the amplitude and waveform of the four voltage signals can be correlated one-to-one with different eye movements. Specifically, Figure 5 The waveform of the voltage signal corresponding to one blink is shown. Figure 6 The voltage signal waveforms corresponding to two blinking actions are shown. It can be seen that each blinking action will result in a significant fluctuation in the voltage waveform and form a trough. The maximum trough value ranges from -0.44V to -0.47V. The number of blinks can be determined by the number of troughs. Figure 7The waveforms of voltage signals corresponding to eye movements in different directions and angles are shown. It can be seen that the electrical signals corresponding to eye movements in different directions are significantly different. When the eye moves upward, the waveform shows one strong peak and one weak peak and one weak peak and one weak trough, with a maximum trough value of -0.28V and a maximum peak value of 0.07V. When the eye moves downward, the waveform shows one strong trough and three weak troughs, with a maximum trough value of -0.25V. When the eye moves to the left, the waveform shows one moderate trough and three weak peaks, with a maximum trough value of -0.15V and a maximum peak value of 0.04V. When the eye moves to the right, the waveform shows one moderate trough and three weak troughs, with a maximum trough value of -0.15V.

[0065] In summary, the coupling of four electrical signals can be used to make a first correspondence between eye movements, enabling precise monitoring and tracking of eye movements (including blinking and eye movements in different directions and angles).

[0066] To achieve human-computer interaction through eye movements, a second mapping can be established between eye movements and input actions from the input device. That is, the decoded eye movements are decoded again, and a one-to-one mapping between eye movements and mouse input actions is established for control. Non-contact control of the input device is achieved by tracking these eye movements. Preferably, as follows... Figure 8 As shown, two blinks correspond to one left mouse button click, three blinks correspond to one right mouse button click, and four blinks correspond to a double left mouse button click; and so on. Figure 9 As shown, looking up, down, left, and right corresponds to moving the mouse up, down, left, and right respectively, thus forming an eye-tracking mouse input system, thereby enabling eye-tracking human-computer interaction for ALS patients.

[0067] The present invention also provides a non-contact eye-tracking control input system, such as Figure 10 As shown, it includes:

[0068] A non-contact eye-tracking device is used to generate electrical signals by tracking eye movements. Preferably, the non-contact eye-tracking device includes a sensor interface array 1 and glasses 2 as described above. The sensor interface array 1 carries an electrostatic charge and is attached to the glasses 2. When worn, the sensor interface array 1 is placed in front of the wearer's eyes by means of the glasses 2, which can be goggles, sun visors, prescription glasses, etc.

[0069] An electrical signal processing device is used to establish a first correspondence between electrostatic signals and eye movements, and a second correspondence between eye movements and input commands, wherein preferably, the input commands are mouse commands;

[0070] A signal receiving and executing device, used to receive input commands and execute corresponding operations according to the input commands;

[0071] Optionally, the signal receiving and execution device is a mouse, which receives input commands and performs corresponding input actions according to the input commands. In this case, the eye-tracking input system also includes an operation terminal, which can receive input commands from the mouse and perform corresponding operation displays. The operation terminal includes, but is not limited to, desktop computers, laptops, tablets, etc.

[0072] Optionally, the signal receiving and execution device is an operation terminal. The operation terminal can input commands to directly perform corresponding operations and display the corresponding operations. In this case, eye-tracking control input operations can be performed without additional input devices. The operation terminal includes, but is not limited to, desktop computers, laptops, tablets, etc.

[0073] This invention also provides a non-contact eye-tracking control input method, such as... Figure 11 As shown, it includes:

[0074] Step 1, eye movements, including blinking and eye movement;

[0075] Step 2: Place the electrostatically charged sensor interface array in front of the wearer's eyes to interact with the naturally charged skin around the eyes to generate electrical signals; after eye movements occur, the different undulations of the skin around the eyes in different areas cause changes in the spatial electrostatic field, resulting in changes in electrical signals.

[0076] Step 3: First, match the electrical signal with the eye movement, and second, match the eye movement with the input command, wherein the input command is a mouse command;

[0077] Preferably, this embodiment selects to collect voltage signal changes from four channels. Since different eye movements cause different voltage signals in the four channels, the amplitude and waveform of the four voltage signals can correspond one-to-one with different eye movements. Specifically, Figure 5 The waveform of the voltage signal corresponding to one blink is shown. Figure 6 The voltage signal waveforms corresponding to two blinking actions are shown. It can be seen that each blinking action will result in a significant fluctuation in the voltage waveform and form a trough. The maximum trough value ranges from -0.44V to -0.47V. The number of blinks can be determined by the number of troughs. Figure 7The waveforms of voltage signals corresponding to eye movements in different directions and angles are shown. It can be seen that the electrical signals corresponding to eye movements in different directions are significantly different. When the eye moves upward, the waveform shows one strong peak and one weak peak and one weak peak and one weak trough, with a maximum trough value of -0.28V and a maximum peak value of 0.07V. When the eye moves downward, the waveform shows one strong trough and three weak troughs, with a maximum trough value of -0.25V. When the eye moves to the left, the waveform shows one moderate trough and three weak peaks, with a maximum trough value of -0.15V and a maximum peak value of 0.04V. When the eye moves to the right, the waveform shows one moderate trough and three weak troughs, with a maximum trough value of -0.15V.

[0078] In summary, the coupling of four electrical signals can be used to make a first correspondence between eye movements, enabling precise monitoring and tracking of eye movements (including blinking and eye movements in different directions and angles).

[0079] To achieve human-computer interaction through eye movements, a second mapping can be established between eye movements and input actions from the input device. That is, the decoded eye movements are decoded again, and a one-to-one mapping between eye movements and mouse input actions is established for control. Non-contact control of the input device is achieved by tracking these eye movements. Preferably, as follows... Figure 8 As shown, two blinks correspond to one left mouse button click, three blinks correspond to one right mouse button click, and four blinks correspond to a double left mouse button click; and so on. Figure 9 As shown, looking up, down, left, and right corresponds to moving the mouse up, down, left, and right in the same directions.

[0080] Step 4: Implement command input for eye-tracking control input device; achieve non-contact control of input device by tracking eye movements, thereby forming an eye-tracking mouse input system, and thus realize eye-tracking control human-computer interaction for ALS patients.

[0081] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0082] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A non-contact eye-tracking device, characterized in that, include: Sensor interface arrays and wearable devices, The sensor interface array is disposed on the wearable device; The sensing interface array includes a sensing electrode, a transparent support layer, and a dielectric material layer. The sensing electrode is attached to the transparent support layer, and the dielectric material layer is located on the surface of the sensing electrode. The surface of the dielectric material layer can maintain static charge and generate electrical signals during eye movements. The eye movements include: the number of blinks and eye rotations in different directions and angles, which are correlated with the eye movements through the coupling of the electrical signals. The electrical signal includes: voltage signal, charge quantity, or current quantity; the change in the voltage signal includes amplitude change and waveform change; the waveform change includes peaks and troughs. The sensing electrodes are four in number, arranged in a top-bottom, three-position configuration, capable of generating four electrical signals. These four electrical signals are coupled together to establish a primary correspondence with the eye movement. Wherein, the first correspondence includes any one or more of the following: The number of blinks is determined by the number of troughs in the voltage waveforms of the four electrical signals. When the eyeballs move upward, the wave pattern consists of a first intensity peak and trough and a second intensity peak and trough, where the first intensity is greater than the second intensity. When the eyeball moves downward, the wave pattern consists of one trough of first intensity and three troughs of second intensity. When the eyeball turns to the left, the wave pattern consists of one trough of the third intensity and three peaks of the second intensity, where the third intensity is greater than the second intensity but less than the first intensity. When the eyeball turns to the right, the wave pattern consists of one trough of third intensity and three troughs of second intensity.

2. The non-contact eye-tracking device according to claim 1, characterized in that, The dielectric material is charged on its surface by high-voltage polarization, with a thickness ranging from 3 μm to 100 μm. The high-voltage polarization is achieved using a high-voltage polarizer or an antistatic gun. The dielectric material layer is selected from one or more of the following materials: polytetrafluoroethylene, perfluoroethylene-propylene copolymer, polydimethylsiloxane, polyimide, aniline-formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide, melamine-formaldehyde, polyethylene glycol succinate, cellulose, cellulose acetate, polyethylene adipate, diallyl phthalate, styrene-propylene copolymer, styrene-butadiene copolymer, synthetic fiber, polymethyl methacrylate, polyvinyl alcohol, polyester, polyisobutylene, polyethylene terephthalate, polyvinyl butyral, natural rubber, polyacrylonitrile, polyvinylidene chloride-co-acrylonitrile, polyvinylpropene carbonate, polystyrene, polymethyl methacrylate, polycarbonate, liquid crystal polymer, polychloroprene, polyacrylonitrile, polybisphenol carbonate, polyvinyl chloride ether, polyvinylidene chloride, polyethylene, polypropylene, polyvinyl chloride, titanium dioxide, barium titanate, calcium titanate.

3. The non-contact eye-tracking device according to claim 1, characterized in that, The sensing electrodes are multiple and are evenly distributed in the blind area around the eyeball; The sensing electrode is selected from one or more of the following materials: metal conductive thin film, indium tin oxide, PEDOT:PSS coating, metal nano coating, and conductive polymer coating.

4. The non-contact eye-tracking device according to claim 1, characterized in that, The thickness of the transparent support layer ranges from 10 μm to 2000 μm, and the transparent support layer is a transparent elastomer or a transparent film; The transparent elastomer is selected from one or more of the following materials: polydimethylsiloxane, Ecoflex, polyurethane, and SEBS; The transparent film is selected from one or more of the following materials: transparent polyethylene, polyvinyl chloride, polypropylene, and polymethyl methacrylate.

5. The non-contact eye-tracking device according to claim 1, characterized in that, The wearable device is eyeglasses, which may be goggles, sunshades, or prescription glasses.

6. A non-contact eye-tracking control input system, characterized in that, include: The non-contact eye-tracking device as described in any one of claims 1-5 is used to track eye movements and generate electrical signals; An electrical signal processing device is used to perform a first correspondence between the electrical signal and the eye movement, and a second correspondence between the eye movement and the input command; A signal receiving and executing device is used to receive the input command and execute the corresponding operation according to the input command.

7. The non-contact eye-tracking control input system according to claim 6, characterized in that, The non-contact eye-tracking device includes four sensing electrodes, which can generate four electrical signals. The coupling effect of the four electrical signals is used to establish a first correspondence with the eye movement.

8. The non-contact eye-tracking control input system according to claim 6, characterized in that, The input command is a mouse command, and the second correspondence includes: Two blinks correspond to one left mouse button click, three blinks correspond to one right mouse button click, and four blinks correspond to a double left mouse button click. The eye movements in the four directions of up, down, left, and right correspond to the mouse movements in the four directions of up, down, left, and right, respectively.

9. A non-contact eye-tracking control input method, characterized in that, include: Using any one of the non-contact eye-tracking devices as described in any one of claims 1-5, an electrical signal is generated based on the wearer's eye movements; The electrical signal is first mapped to the eye movement, and the eye movement is second mapped to the input command; To enable input of eye-tracking control commands.

Images