Smart glasses for eye activity monitoring

Abstract

The utility model provides a kind of intelligent glasses for eye movement monitoring, comprising: transparent flexible reconfigurable antenna, adopt coplanar waveguide structure, transparent flexible reconfigurable antenna includes radiator, feed line, director, ground plate and switch diode, radiator, feed line, director, ground plate and switch diode are all placed in the same face of transparent flexible dielectric substrate, transparent flexible reconfigurable antenna is made of transparent conductive material, and the radiation direction of radiator is dynamically adjusted by controlling the on-off of switch diode;Data acquisition module is used to collect the reflection coefficient data of transparent flexible reconfigurable antenna changed due to eye movement after wearing the lens integrated with transparent flexible reconfigurable antenna on human body.The transparent reconfigurable antenna of the application is made of transparent conductive material, and the radiation direction can be dynamically adjusted, integrated into lens without additional space occupation and without blocking sight, to realize light, flexible, portable eye movement state recognition.

Description

Technical Field

[0001] This utility model relates to the field of wearable device technology, specifically to a smart glasses for eye activity monitoring. Background Technology

[0002] A Wireless Body Area Network (WBAN) is a communication network centered on the human body, composed of network elements related to the human body (including personal terminals, sensors distributed on the body, clothing, within a 2-meter radius of the body, and even inside the body, and networking equipment). Currently, WBANs have wide applications, playing an important role in the medical, military, entertainment, and sports fields. Especially in the medical field, sensor nodes on the human body can monitor and record human health signals over long periods, presenting the data accurately and in real time to medical staff and patients, assisting medical personnel in implementing medical procedures.

[0003] With the development of WBAN, the integration of transparent and flexible antennas into wearable devices has become a research hotspot. Wearable antennas enable lightweight, flexible, low-cost and portable wireless communication and sensing, and are a key element in the design of wireless wearable devices. They are compatible with devices of different shapes, sizes and materials, and create additional space for other components to achieve device miniaturization.

[0004] Current research on transparent antennas focuses on windows, car windshields, and mobile wireless communications. Some studies propose integrating transparent flexible antennas into eyeglasses for communication or into lenses to measure intraocular pressure close to the eyes of glaucoma patients. However, existing technologies have the following problems: 1. There is a lack of eye condition monitoring solutions that can be integrated into lenses without taking up space or obstructing the line of sight; 2. Existing camera-based eye recognition solutions are bulky, costly, and not portable; 3. Existing integrated antennas in eyeglasses are only used for communication and cannot achieve the perception and monitoring of eye movement.

[0005] A patent search revealed an invention patent with publication number CN106506823A, which discloses an intelligent wearable device, system, method, and apparatus for controlling a terminal device. This intelligent wearable device includes: an eye motion acquisition antenna for acquiring multiple electromagnetic wave signals generated during eye movements; a feature information extraction circuit for extracting feature information from the multiple electromagnetic wave signals; an eye motion recognition circuit for importing the feature information into a pre-trained motion recognition model for matching and obtaining an eye motion pattern, wherein the motion recognition model represents the correspondence between the feature information and the eye motion pattern; and a recognition result transmission antenna for sending the eye motion pattern to a pre-connected terminal device so that the terminal device can perform operations related to the eye motion pattern. This patent focuses solely on terminal control, with the main acquisition antenna mounted on the frame of eyeglasses and auxiliary acquisition antennas mounted on the temples and / or nose pads that contact the user's skin. It does not address the integration of transparent flexible materials into the lenses, nor does it solve the problems of large size and high cost associated with camera-based solutions. Furthermore, it suffers from insufficient signal fidelity, acquisition integrity, and scene adaptability. In summary, given the problems of the existing technologies, developing a smart glasses system for eye activity monitoring has become a critical task that urgently needs to be addressed. Utility Model Content

[0006] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a smart glasses for eye activity monitoring.

[0007] According to the present invention, a smart glasses for monitoring eye movement includes: The transparent flexible reconfiguration antenna adopts a coplanar waveguide structure. The transparent flexible reconfiguration antenna includes a radiator, a feed line, a director, a ground plane, and a switching diode. The radiator, feed line, director, ground plane, and switching diode are all placed on the same side of the transparent flexible dielectric substrate. The transparent flexible reconfiguration antenna is made of transparent conductive material. The radiation direction of the radiator is dynamically adjusted by controlling the on and off of the switching diode. The data acquisition module is used to collect the reflection coefficient data of the transparent flexible reconfigurable antenna as it changes due to eye movements after the human body wears a lens with an integrated transparent flexible reconfigurable antenna.

[0008] Preferably, the radiator is a planar oscillator, and the shape of the planar oscillator is rectangular, square, trapezoidal, triangular, circular, elliptical, polygonal, or fractal.

[0009] Preferably, the radiator is connected to the signal source via a transmission line, which is a microstrip line, a coplanar waveguide, or a parallel double line.

[0010] Preferably, the transparent flexible reconfiguration antenna is a rectangular monopole antenna. A transparent conductive film is prepared on the transparent flexible dielectric substrate. The antenna structure formed on the transparent conductive film includes a radiator, a feed line, and ground planes located on the left and right sides of the feed line, respectively. The radiator and the feed line are connected by a trapezoidal transition module. The trapezoidal transition module serves as a gradient structure to achieve broadband impedance matching. On the left and right sides of the radiator, a parasitic rectangular oscillator serving as a director is provided. A slot is opened in the middle of each director, and a switching diode is connected across the slot.

[0011] Preferably, the switching diode is DC biased, and the electrical length of the director is changed by controlling the on and off state of the switching diode, thereby dynamically adjusting the radiation direction of the radiator and enabling the antenna to operate in different modes.

[0012] Preferably, the radiator, feeder, director, and ground plane are all made of transparent conductive material and printed on a transparent flexible dielectric substrate. The transparent conductive material includes indium tin oxide, fluorine-doped tin oxide, tungsten-doped indium oxide, aluminum-doped zinc oxide, silver metal mesh, or copper metal mesh. The thickness of the transparent conductive material is less than 1 μm, the surface resistance is less than 3 ohms / unit area, and the light transmittance is greater than 70%.

[0013] Preferably, the transparent flexible reconfiguration antenna has a total width W=44 and a total length L=26; the radiator has a width w2=5 and a length l2=8.5; the trapezoidal transition module has a height d1=1; the feed line has a width w3=3; the ground plane has a width w4=2.5 and a length l3=4; the director has a width w1=4; the director's length after disconnection is l1=12; the director's central gap width is d4=0.7; the director stub has a width w5=3 and a length d5=1; the distance between the ground plane and the director is d2=10; and the distance between the ground plane and the feed line is d3=0.5.

[0014] Preferably, the material of the transparent flexible dielectric substrate includes polyvinylnaphthol, polydimethylsiloxane, polyimide, or polyethylene terephthalate.

[0015] Preferably, in the data acquisition module, the transparent flexible reconfigurable antenna is integrated onto the lens in the following ways: directly printed on the lens surface or first printed on a transparent flexible film and then attached to the lens surface; the transparent flexible reconfigurable antenna is positioned directly opposite the center of the eye.

[0016] Preferably, the data acquisition module constructs a data acquisition link, which begins with a transparent flexible reconfigurable antenna integrated on the lens. The feed line of the transparent flexible reconfigurable antenna is connected to the conductive line of the coaxial cable through conductive silver paste. The two ground planes of the transparent flexible reconfigurable antenna are connected to the ground line of the coaxial cable through conductive silver paste. The coaxial cable is led out from inside the lens frame and temple. The other end of the coaxial cable is connected to the signal transceiver through an SMA connector. The data acquisition module acquires and records the antenna reflection coefficient data through the signal transceiver.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The transparent reconfigurable antenna of this utility model is made of transparent conductive material and integrated on the lens. It does not occupy extra space and does not obstruct the line of sight. It can monitor eye movement status anytime and anywhere without additional components.

[0018] 2. This utility model can dynamically adjust the radiation direction by controlling the on / off state of the switching diodes in the transparent reconfigurable antenna, adapting to the needs of different application scenarios. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a shape and size diagram of the transparent flexible antenna in the embodiments of this utility model; Figure 2 This is an equivalent circuit diagram of the switching diode in the off state and the on state in the embodiment of this utility model; Figure 3 This is a schematic diagram of the connection between the transparent reconfigurable antenna and the coaxial cable in an embodiment of this utility model. Detailed Implementation

[0020] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0021] This invention discloses a smart glasses for eye movement monitoring, comprising: a transparent flexible reconfigurable antenna employing a coplanar waveguide structure; the transparent flexible reconfigurable antenna includes a radiator, a feed line, a director, a ground plane, and a switching diode; the radiator, feed line, director, ground plane, and switching diode are all placed on the same side of a transparent flexible dielectric substrate; the transparent flexible reconfigurable antenna is made of a transparent conductive material; and the radiation direction of the radiator is dynamically adjusted by controlling the switching diode; and a data acquisition module for acquiring the reflection coefficient data of the transparent flexible reconfigurable antenna as it changes due to eye movement after the wearer wears a lens with the integrated transparent flexible reconfigurable antenna. The transparent reconfigurable antenna of this invention is made of a transparent conductive material, can dynamically adjust its radiation direction, and is integrated into the lens without taking up additional space or obstructing the line of sight, achieving lightweight, flexible, and portable eye movement state recognition.

[0022] Example 1: Figure 1 This is a shape and size diagram of the transparent flexible antenna in the embodiment of this utility model.

[0023] like Figure 1 As shown, this embodiment provides smart glasses for eye activity monitoring, including: The transparent flexible reconfiguration antenna adopts a coplanar waveguide (CPW) structure. The transparent flexible reconfiguration antenna includes a radiator 1, a feed line 3, a director 5, a ground plane 4, and a switching diode 6. The radiator 1, feed line 3, director 5, ground plane 4, and switching diode 6 are all placed on the same side of the transparent flexible dielectric substrate. The transparent flexible reconfiguration antenna is made of transparent conductive material, and the radiation direction of the radiator is dynamically adjusted by controlling the switching of the switching diode.

[0024] Specifically, the radiator 1 is a planar dipole, and the shape of the planar dipole can be rectangular, square, trapezoidal, triangular, circular, elliptical, polygonal or fractal structure; the radiator 1 is connected to the signal source through a transmission line, which can be in the form of microstrip line, coplanar waveguide or parallel double line, etc. In this embodiment, CPW feeding is used.

[0025] The transparent flexible reconfiguration antenna is a rectangular monopole antenna with a transparent flexible dielectric substrate. Figure 1 In the light-colored portion (in this embodiment, PET material is used), a transparent conductive film is prepared on it. Figure 1The darker portion (in this embodiment, ITO is used) forms the antenna structure on a transparent conductive film, comprising: a radiator 1, a feed line 3, and ground planes 4 located on the left and right sides of the feed line 3, respectively. The radiator 1 and the feed line 3 are connected by a trapezoidal transition module 2, which serves as a gradient structure for broadband impedance matching. On the left and right sides of the radiator 1, a parasitic rectangular vibrator serving as a director 5 is provided. A slot is formed in the middle of each director 5, and a switching diode 6 is connected across this slot. By controlling the on / off state of the switching diode 6, the electrical length of the director is changed, thereby dynamically adjusting the radiation direction of the radiator 1 and enabling the antenna to operate in different modes. The switching diode 6 is DC biased, and the equivalent circuits for the off and on states of the switching diode 6 are as follows... Figure 2 As shown.

[0026] The radiator 1, feeder 3, director 5 and ground plane 4 are all made of transparent conductive material and printed on a transparent flexible dielectric substrate.

[0027] The transparent conductive materials include indium tin oxide (ITO), fluorine-doped tin oxide (FTO), tungsten-doped indium oxide (IWO), aluminum-doped zinc oxide (AZO), silver metal mesh, or copper metal mesh. The thickness of the transparent conductive material is less than 1 μm, the surface resistance is less than 3 ohms / unit area, and the light transmittance is greater than 70%. In this embodiment, ITO is used, and its conductive film thickness is 650 nm with a surface resistance of 3 ohms / unit area.

[0028] The transparent flexible dielectric substrate is made of materials including polyvinylnaphthol (PEN), polydimethylsiloxane (PDMS), polyimide (PI), or polyethylene terephthalate (PET). In this embodiment, the PET dielectric substrate is 0.125 mm thick, resulting in an ITO-PET antenna with a light transmittance greater than 73%.

[0029] Coplanar waveguide-fed (CPW-fed) technology avoids the problem of significant antenna performance degradation due to feeder position deviation, and has the advantages of low cost, high integration, simple manufacturing process, and convenient connection with various passive or active devices. This transparent flexible antenna structure meets the requirements of high transparency, flexibility, and low surface resistance. It can be attached to the lens using ultra-thin transparent PET double-sided adhesive, exhibiting good compatibility with transparent materials, facilitating device miniaturization and minimizing visual impact.

[0030] Figure 1 The key dimensions of the antenna are also marked, and their specific values ​​are shown in the table below:

[0031] As shown in the table, the transparent flexible reconfiguration antenna has a total width W=44 and a total length L=26; radiator 1 has a width w2=5 and a length l2=8.5, and the trapezoidal transition module 2 has a height d1=1; feeder 3 has a width w3=3, ground plane 4 has a width w4=2.5 and a length l3=4; director 5 has a width w1=4, and its length after disconnection l1=12 (half the length of director 5), and the width of the gap in the middle of director 5 is d4=0.7; the width of the stub of director 5 is w5=3, the length of the stub of director 5 is d5=1, the distance between ground plane 4 and director 5 is d2=10; and the distance between ground plane 4 and feeder 3 is d3=0.5.

[0032] The data acquisition module is used to collect the reflection coefficient or transmission coefficient data of the transparent flexible reconfigurable antenna as it changes due to eye movements after the human body wears a lens with an integrated transparent flexible reconfigurable antenna.

[0033] The basic principle of the data acquisition module is that eye movements (such as opening and closing the eyes) change the dielectric environment around the antenna, thereby causing the reflection coefficient and transmission coefficient of the transparent flexible reconfigurable antenna to change with eye movements.

[0034] In this embodiment, the lens integrating the transparent flexible reconfigurable antenna includes a transparent conductive film and a transparent flexible dielectric substrate.

[0035] Specifically, in the data acquisition module, the transparent flexible reconfiguration antenna is integrated onto the lens in the following ways: directly printed on the lens surface or first printed on a transparent flexible film and then attached to the lens surface; the transparent flexible reconfiguration antenna is positioned directly opposite the center of the eye. In this embodiment, one transparent flexible reconfiguration antenna is provided on each of the left and right lenses to obtain more comprehensive data.

[0036] Figure 3 This is a schematic diagram of the connection between the transparent reconfigurable antenna and the coaxial cable in an embodiment of this utility model.

[0037] Figure 3 As shown, the data acquisition module constructs a complete data acquisition link. This data acquisition link begins with the transparent flexible reconfigurable antenna 100 integrated on the lens. The feed line 3 of the transparent flexible reconfigurable antenna 100 is connected to the conductive line of the coaxial cable 300 through conductive silver paste. The two ground planes 4 of the transparent flexible reconfigurable antenna 100 are connected to the ground line of the coaxial cable 300 through conductive silver paste. The coaxial cable 300 is led out from inside the lens frame and temples. The other end of the coaxial cable 300 is connected to the signal transceiver device (in this embodiment, a vector network analyzer) through an SMA connector. The data acquisition module acquires and records the antenna reflection coefficient (or transmission coefficient) data through this signal transceiver device.

[0038] Those skilled in the art will understand that, besides implementing the system and its various devices, modules, and units provided by this utility model in the form of purely computer-readable program code, the same functions can be achieved entirely through logical programming of the method steps, enabling the system and its various devices, modules, and units to function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers. Therefore, the system and its various devices, modules, and units provided by this utility model can be considered a hardware component, and the devices, modules, and units included therein for implementing various functions can also be considered structures within the hardware component; alternatively, the devices, modules, and units for implementing various functions can be considered both software modules implementing the method and structures within the hardware component.

[0039] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A smart pair of glasses for monitoring eye movement, characterized in that, include: A transparent flexible reconfigurable antenna employs a coplanar waveguide structure. The transparent flexible reconfigurable antenna includes a radiator, a feed line, a director, a ground plane, and a switching diode. The radiator, the feed line, the director, the ground plane, and the switching diode are all placed on the same side of a transparent flexible dielectric substrate. The transparent flexible reconfigurable antenna is made of a transparent conductive material. The radiation direction of the radiator is dynamically adjusted by controlling the on / off state of the switching diode. The data acquisition module is used to collect the reflection coefficient data of the transparent flexible reconfigurable antenna as it changes due to eye movements after the human body wears a lens integrating the transparent flexible reconfigurable antenna.

2. The smart glasses for eye movement monitoring according to claim 1, characterized in that, The radiator is a planar oscillator, and the shape of the planar oscillator is rectangular, square, trapezoidal, triangular, circular, elliptical, polygonal, or fractal.

3. The smart glasses for eye activity monitoring according to claim 1, characterized in that, The radiator is connected to the signal source via a transmission line, which can be a microstrip line, a coplanar waveguide, or a parallel bilinear line.

4. The smart glasses for eye movement monitoring according to claim 1, characterized in that, The transparent flexible reconfiguration antenna is a rectangular monopole antenna. A transparent conductive film is fabricated on the transparent flexible dielectric substrate. The antenna structure formed on the transparent conductive film includes a radiator, a feed line, and ground planes located on the left and right sides of the feed line, respectively. The radiator and the feed line are connected by a trapezoidal transition module. The trapezoidal transition module serves as a gradient structure to achieve broadband impedance matching. On the left and right sides of the radiator, a parasitic rectangular oscillator serving as a director is provided. A slit is opened in the middle of each director, and the switching diode is connected across the slit.

5. The smart glasses for eye movement monitoring according to claim 4, characterized in that, The switching diode is DC biased. By controlling the on / off state of the switching diode, the electrical length of the director is changed, thereby dynamically adjusting the radiation direction of the radiator and enabling the antenna to operate in different modes.

6. The smart glasses for eye movement monitoring according to claim 5, characterized in that, The radiator, the feed line, the director, and the ground plane are all made of transparent conductive material and printed on a transparent flexible dielectric substrate. The transparent conductive material includes indium tin oxide, fluorine-doped tin oxide, tungsten-doped indium oxide, aluminum-doped zinc oxide, silver metal mesh, or copper metal mesh. The thickness of the transparent conductive material is less than 1 μm, the surface resistance is less than 3 ohms / unit area, and the light transmittance is greater than 70%.

7. The smart glasses for eye movement monitoring according to claim 6, characterized in that, The transparent flexible reconfigurable antenna has a total width W=44 and a total length L=26; the radiator has a width w2=5 and a length l2=8.5; the trapezoidal transition module has a height d1=1; the feed line has a width w3=3; the ground plane has a width w4=2.5 and a length l3=4; the director has a width w1=4 and a length l1=12 after disconnection; the director's central gap width d4=0.7; the director stub has a width w5=3 and a length d5=1; the distance between the ground plane and the director is d2=10; and the distance between the ground plane and the feed line is d3=0.

5.

8. The smart glasses for eye movement monitoring according to claim 1, characterized in that, The material of the transparent flexible dielectric substrate includes polyvinylnaphthol, polydimethylsiloxane, polyimide, or polyethylene terephthalate.

9. The smart glasses for eye movement monitoring according to claim 1, characterized in that, In the data acquisition module, the transparent flexible reconfigurable antenna is integrated onto the lens in the following ways: directly printed on the lens surface or first printed on a transparent flexible film and then attached to the lens surface; the transparent flexible reconfigurable antenna is positioned directly opposite the center of the eye.

10. The smart glasses for eye movement monitoring according to claim 1, characterized in that, The data acquisition module constructs a data acquisition link, which begins with a transparent flexible reconfigurable antenna integrated on the lens. The feed line of the transparent flexible reconfigurable antenna is connected to the conductive line of the coaxial cable through conductive silver paste. The two ground planes of the transparent flexible reconfigurable antenna are connected to the ground line of the coaxial cable through conductive silver paste. The coaxial cable is led out from inside the frame and temples, and the other end of the coaxial cable is connected to the signal transceiver through an SMA connector. The data acquisition module acquires and records the antenna reflection coefficient data through the signal transceiver.

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