Eye movement tracking device and method and near-eye display equipment

Abstract

The invention relates to the field of eye movement tracking, and provides an eye movement tracking device and method and near-eye display equipment, and the eye movement tracking device comprises a light source assembly which is used for providing a reproduction light beam; the holographic optical element is used for reproducing an illumination light beam under the irradiation of the reproduction light beam; and the camera shooting assembly is used for acquiring a target image formed by a first reflection light beam obtained by reflecting the illumination light beam through human eyes so as to realize eye movement tracking according to the target image. The holographic optical element is irradiated through the reproduction light beam provided by the light source assembly, so that the holographic optical element reproduces the illumination light beam, and the target image formed by the first reflection light beam obtained by reflecting the illumination light beam through the human eye is obtained through the camera shooting assembly, so that the illumination light source or the camera shooting assembly is prevented from being arranged at the position opposite to the human eye; the eye movement tracking device is prevented from blocking the human eyes, and the visual area of the human eyes is increased.

Description

Technical Field

[0001] The present application relates to the field of eye tracking technology, and in particular to an eye tracking device, method and near-eye display equipment. Background Art

[0002] Current near-eye display devices usually use the Purkinje spots formed by the light beam shining on the eyeball as a reference point to calculate the position of the human eye's gaze point. Therefore, it is usually necessary to set a light source at a position relative to the human eye, such as setting infrared LED lamp beads on the lenses of smart glasses to block the human eye's line of sight. How to reduce the occlusion of the eye by the eye tracking device and increase the visible area of ​​the near-eye display device to improve the user experience of the near-eye display device has become an urgent problem to be solved. Summary of the invention

[0003] The main purpose of this application is to provide an eye tracking device, method and near-eye display device, aiming to reduce the occlusion of the human eye by the eye tracking device and increase the visual area of ​​the human eye.

[0004] In a first aspect, the present application provides an eye tracking device, the eye tracking device comprising:

[0005] A light source assembly, the light source assembly being used to provide a reproduction light beam;

[0006] a holographic optical element, the holographic optical element being used to reproduce the illumination light beam under the illumination of the reproduction light beam;

[0007] A camera assembly is used to obtain a target image formed by a first reflected light beam obtained by reflecting the illumination light beam through a human eye, so as to realize eye tracking according to the target image.

[0008] In some embodiments, the holographic optical element has a preset reflectivity, and is further used to reflect the first reflected light beam to obtain a second reflected light beam; the camera assembly is used to acquire a target image formed by the second reflected light beam obtained by reflecting the first reflected light beam through the holographic optical element.

[0009] In some embodiments, the holographic optical element has a preset transmittance, and the eye tracking device also includes a first reflection module, which is used to reflect the first reflected light beam to obtain a second reflected light beam; the camera assembly is used to obtain a target image formed by the second reflected light beam obtained by reflecting the first reflected light beam through the first reflection module.

[0010] In some embodiments, the eye tracking device further includes a second reflection module, which is used to reflect the second reflected light beam to obtain a third reflected light beam, and the third reflected light beam is used to form a target light spot in the target image of the camera assembly.

[0011] In some embodiments, the eye tracking device further includes a spectroscopic module, which is disposed at a position relative to the light source assembly and the camera assembly, and is used to reflect a fourth reflected light beam from the third reflected light beam for forming the target light spot in the target image.

[0012] In some embodiments, the light splitting module includes a semi-reflective mirror, and a polarization optical element is disposed on the semi-reflective mirror.

[0013] In a second aspect, the present application also provides a near-eye display device, which includes the eye tracking device described in any one of the embodiments of the present application.

[0014] In some embodiments, the near-eye display device further includes a display light source assembly and an optical waveguide assembly, wherein the display light source assembly is used to provide an image display light beam;

[0015] The optical waveguide component is provided with a coupling module and a coupling module. The coupling module is used to couple the image display light beam into the optical waveguide component for transmission, and the coupling module is used to couple the image display light beam transmitted in the optical waveguide component out of the optical waveguide component. The image display light beam is used to display a preset virtual image.

[0016] In a third aspect, the present application further provides an eye tracking method, characterized in that the eye tracking method is applied to the eye tracking device described in any one of the embodiments of the present application, and the eye tracking device comprises:

[0017] A light source assembly, the light source assembly being used to provide a reproduction light beam;

[0018] a holographic optical element, the holographic optical element being used to reproduce the illumination light beam under the illumination of the reproduction light beam;

[0019] A camera assembly, the camera assembly is used to obtain a target image formed by a first reflected light beam obtained by reflecting the illumination light beam through a human eye;

[0020] The method comprises:

[0021] Acquire a target image of the camera assembly;

[0022] Identifying a target light spot in the target image to obtain a current position of the target light spot;

[0023] According to the current position, a target angle between the illumination light beam and the first reflected light beam is determined to achieve eye tracking.

[0024] In some embodiments, determining a target angle between the illumination beam and the first reflected beam according to the current position to implement eye tracking includes:

[0025] According to a preset light spot position, determining a target distance between the current position and the preset light spot position;

[0026] According to the corresponding relationship between the target distance and the target angle, the target angle between the illumination light beam and the first reflected light beam is determined to achieve eye tracking.

[0027] The present application provides an eye tracking device, method and near-eye display device, wherein the eye tracking device comprises: a light source assembly, the light source assembly is used to provide a reproduced light beam; a holographic optical element, the holographic optical element is used to reproduce an illumination light beam under the irradiation of the reproduced light beam; and a camera assembly, the camera assembly is used to obtain a target image formed by a first reflected light beam obtained by reflecting the illumination light beam through the human eye, so as to realize eye tracking according to the target image. The eye tracking device provided by the present application irradiates the holographic optical element with the reproduced light beam provided by the light source assembly, so that the holographic optical element reproduces the illumination light beam, and obtains the target image formed by the first reflected light beam obtained by reflecting the illumination light beam through the human eye through the camera assembly, thereby avoiding setting an illumination light source or a camera assembly at a position relative to the human eye, avoiding the occlusion of the human eye by the eye tracking device, and increasing the visual area of ​​the human eye. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic block diagram of the structure of a pair of smart glasses provided in one embodiment of the present application;

[0030] Figure 2 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application;

[0031] Figure 3 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application;

[0032] Figure 4 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application;

[0033] Figure 5 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application;

[0034] Figure 6 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application;

[0035] Figure 7 A schematic block diagram of the correspondence between a reflection angle and a target distance provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0038] Embodiments of the present application provide an eye tracking device, method, and near-eye display device.

[0039] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] Please refer to Figure 1 , Figure 2 , Figure 1 A schematic block diagram of the structure of a pair of smart glasses provided in one embodiment of the present application; Figure 2 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application.

[0041] like Figure 1 As shown, the eye tracking device provided in the embodiment of the present application includes:

[0042] A light source assembly, the light source assembly being used to provide a reproduction light beam;

[0043] a holographic optical element, the holographic optical element being used to reproduce the illumination light beam under the illumination of the reproduction light beam;

[0044] A camera assembly is used to obtain a target image formed by a first reflected light beam obtained by reflecting the illumination light beam through a human eye, so as to realize eye tracking according to the target image.

[0045] Exemplarily, a holographic medium is a material that can record and store the amplitude and phase information of a light beam. When two coherent light beams are simultaneously irradiated on the holographic medium, the two light beams interfere with each other in the holographic medium, and relevant information such as the amplitude and phase of the light beams is stored in the holographic medium in the form of an interference pattern. When one of the light beams is irradiated on the interference pattern on the holographic medium again, the holographic medium can reproduce the other light beam.

[0046] The embodiment of the present application utilizes this characteristic of the holographic medium to record the information of the illumination beam used for eye tracking in the holographic optical element made of the holographic medium. When eye tracking is required, the illumination beam can be reproduced by irradiating the holographic optical element with the reproduced light beam, and the target image obtained by illuminating the human eye with the illumination beam is obtained through the camera assembly, and eye tracking is achieved based on the target image. Compared with the illumination beam emitted by lamp beads, since the holographic medium usually has a higher light transmittance, it avoids blocking the human eye and increases the visual area of ​​the human eye.

[0047] like Figure 2 As shown, when the angle of human eye gaze changes, the position where the human eye reflects the illumination beam changes, thereby changing the angle of the first reflected beam. In this way, the position of the first reflected beam in the target image of the camera assembly also changes. Therefore, the target image can be acquired through the camera assembly, and the direction of human eye gaze can be determined according to the position of the light spot formed by the first reflected beam in the target image, thereby achieving eye tracking. The camera assembly can be set at any position of the eye tracking device, which is not limited here.

[0048] In some embodiments, the holographic optical element has a preset reflectivity, and is further used to reflect the first reflected light beam to obtain a second reflected light beam; the camera assembly is used to acquire a target image formed by the second reflected light beam obtained by reflecting the first reflected light beam through the holographic optical element.

[0049] Exemplarily, the holographic optical element may be a reflective holographic optical element with a reflective function, that is, the holographic optical element has a certain reflectivity. In addition to reproducing the illumination beam, the holographic optical element is also used to reflect the first reflected beam reflected by the human eye to obtain a second reflected beam. The camera assembly is used to obtain the target image formed by the second reflected beam, thereby improving the flexibility of the camera assembly setting position. The camera assembly can be set on the side close to the human eye, thereby avoiding the occlusion of the human eye caused by setting the camera assembly on the side opposite to the human eye. In addition, by reflecting the first reflected beam through the holographic optical element, there is no need to set up an additional reflection module, thereby reducing the complexity of the eye tracking device.

[0050] It can be understood that in order for a user to observe an object through the holographic optical element, the holographic optical element also needs to have a certain transmittance.

[0051] Please refer to Figure 3 , Figure 3 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application.

[0052] like Figure 3 As shown, in some embodiments, the holographic optical element has a preset transmittance, and the eye tracking device also includes a first reflection module, which is used to reflect the first reflected light beam to obtain a second reflected light beam; the camera assembly is used to obtain a target image formed by the second reflected light beam obtained by reflecting the first reflected light beam through the first reflection module.

[0053] Exemplarily, the holographic optical element may also be a transmissive holographic optical element, that is, the holographic optical element has a certain transmittance, and reflects the first reflected light beam through the first reflection module, and the camera assembly is used to obtain the target image formed by the second reflected light beam, thereby improving the flexibility of the camera assembly setting position, and the camera assembly can be set on the side close to the human eye, thereby avoiding the occlusion of the human eye caused by setting the camera assembly on the side opposite to the human eye. In addition, by separating the holographic optical element from the first reflection module, the holographic optical element or the first reflection module can be replaced separately, thereby improving the flexibility of the eye tracking device.

[0054] It can be understood that in order to prevent the first reflection module from blocking the human eyes, the first reflection module has a certain transmittance while having a reflection function, so that the human eyes can observe the object through the first reflection module.

[0055] Please refer to Figure 4 , Figure 4 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application.

[0056] like Figure 4As shown, in some embodiments, the eye tracking device also includes a second reflection module, and the second reflection module is used to reflect the second reflected light beam to obtain a third reflected light beam, and the third reflected light beam is used to form a target light spot in the target image of the camera assembly.

[0057] Exemplarily, in order to improve the flexibility of the camera device setting position, the eye tracking device provided in the embodiment of the present application may also include more reflection modules, for example, the second reflection module reflects the second reflection light beam again to obtain a third reflection light beam. The second reflection module may be a reflector. Of course, it is not limited to this. The eye tracking device provided in the embodiment of the present application may also include more reflection modules, which are not limited here.

[0058] Exemplarily, since the angles of the first reflection module and the second reflection module are fixed, specifically, when producing an eye tracking device, the first reflection module and the second reflection module can be set to specific angles. According to the position of the target light spot formed by the third reflected light beam in the target image, the angle of the second reflected light beam can be inferred, and the angle of the first reflected light beam can be inferred based on the angle of the second reflected light beam, thereby achieving eye tracking.

[0059] Please refer to Figure 5 , Figure 5 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application.

[0060] like Figure 5 As shown, in some embodiments, the eye tracking device also includes a spectroscopic module, which is arranged at a position relative to the light source assembly and the camera assembly, and is used to reflect a fourth reflected light beam from the third reflected light beam to form the target light spot in the target image.

[0061] Illustratively, since the reproduced light beam emitted by the light source assembly needs to be irradiated on the holographic optical element, in order to avoid the camera assembly from blocking the light source assembly, a splitter module can also be arranged at the relative position of the light source assembly and the camera assembly, that is, a splitter module is arranged at the intersection of the light emitting direction of the light source assembly and the shooting direction of the camera assembly to separate a fourth reflected light beam from the third reflected light beam to form a target light spot in the target image.

[0062] It is understandable that the light splitting module needs to have a certain reflectivity in order to reflect the fourth reflected light beam from the third reflected light beam; the light splitting module also needs to have a certain transmittance to avoid blocking the reproduced light beam emitted by the light source assembly.

[0063] In some embodiments, the light splitting module includes a semi-reflective and semi-mirror lens, and a polarization optical element is disposed on the semi-reflective and semi-mirror lens.

[0064] Exemplarily, the spectroscopic module can be a half-reflective half-mirror with both reflection and transmission functions. Since light will lose some power when passing through the half-reflective half-mirror, the lost power can be restored by setting a polarizing optical element on the half-reflective half-mirror, thereby increasing the brightness of the target light spot in the target image and further improving the eye tracking accuracy.

[0065] Please refer to Figure 6 , Figure 6 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application.

[0066] like Figure 6 As shown, when the gaze direction of the human eye is offset, the position where the fourth reflected light beam enters the camera assembly is Figure 5 The target light spot will also change, thereby forming a target light spot at a different position of the target image. Therefore, the reflection angle between the first reflected light beam and the illumination light beam can be determined according to the position of the target light spot, thereby realizing eye tracking. Among them, the relationship between the target light spot position and the reflection angle can be preset according to actual conditions.

[0067] Please refer to Figure 7 , Figure 7 A schematic block diagram of the structure of a pair of smart glasses provided in another embodiment of the present application.

[0068] like Figure 7 As shown, assuming that the reflection angle between the illumination beam and the first reflected beam is α, and the distance between the human eye and the holographic optical element is d1, then the distance between the intersection of the first reflected beam and the surface of the holographic optical element and the intersection of the illumination light and the surface of the first holographic optical element is L1=tan(α)*d1. Assuming that the distance between the intersection of the illumination beam and the surface of the holographic optical element and the vertical extension line of the center of the second reflection module is L2, and the angle between the second reflection module and the vertical direction is γ, then the angle between the second reflected beam and the second reflection module is atan(d2 / (L2-L1))-γ. Assuming that the light splitting module is parallel to the second reflection module, then the angle θ found between the fourth reflected light and the surface of the camera assembly is γ-(90-(atan(d2 / (L2-L1))-γ))=2γ-90+atan(d2 / (L2-L1)). Assuming that the distance between the plane of the camera assembly and the vertical extension line of the center of the spectroscopic module is L3, then the distance between the current position of the target light spot and the preset position when the human eye looks straight ahead can be calculated as d3=L3*tan(θ)=L3*tan(2γ-90+atan(d2 / (L2-L1))), thereby determining the relationship between d3 and α.

[0069] An embodiment of the present application also provides a near-eye display device, which includes the eye tracking device described in any one of the embodiments of the present application.

[0070] Exemplarily, the near-eye display device provided in the embodiment of the present application may be a head-mounted display device such as smart glasses and smart helmets. The near-eye display device provides an eye tracking device provided in the embodiment of the present application to determine the position where the human eye is looking, thereby determining the display position of the virtual image.

[0071] Exemplarily, the camera assembly in the eye tracking device can be installed at any position of the near-eye display device. Taking smart glasses as an example, the camera assembly can be installed at the nose pads, temples, etc. of the smart glasses to obtain a target image of the first reflected light beam obtained by reflecting the illumination light beam from the human eye.

[0072] In some embodiments, the near-eye display device further includes a display light source assembly and an optical waveguide assembly, wherein the display light source assembly is used to provide an image display light beam;

[0073] The optical waveguide component is provided with a coupling module and a coupling module. The coupling module is used to couple the image display light beam into the optical waveguide component for transmission, and the coupling module is used to couple the image display light beam transmitted in the optical waveguide component out of the optical waveguide component. The image display light beam is used to display a preset virtual image.

[0074] Exemplarily, the display light source assembly is spaced apart from the light source assembly of the eye tracking device, wherein the image display light beam emitted by the display light source assembly and the reproduction light beam emitted by the light source assembly can be transmitted through the same optical waveguide assembly. Since the image display light beam emitted by the display light source assembly is visible light and the reproduction light beam emitted by the light source assembly is infrared light, the two have different wavelengths and will not interfere with each other.

[0075] The present application also provides an eye tracking method, characterized in that the eye tracking method is applied to the eye tracking device described in any one of the embodiments of the present application, and the eye tracking device includes:

[0076] A light source assembly, the light source assembly being used to provide a reproduction light beam;

[0077] a holographic optical element, the holographic optical element being used to reproduce the illumination light beam under the illumination of the reproduction light beam;

[0078] A camera assembly, the camera assembly is used to obtain a target image formed by a first reflected light beam obtained by reflecting the illumination light beam through a human eye;

[0079] The method comprises:

[0080] Acquire a target image of the camera assembly;

[0081] Identifying a target light spot in the target image to obtain a current position of the target light spot;

[0082] According to the current position, a target angle between the illumination light beam and the first reflected light beam is determined to achieve eye tracking.

[0083] Exemplarily, the camera assembly can be connected to the processor for implementing the eye tracking method, so that the camera assembly can transmit the target image to the processor in real time, and the processor can identify the target light spot in the target image. Specifically, since the target light spot has a high brightness, the current position of the target light spot in the target image can be identified by a preset pixel brightness threshold, for example, pixels with pixel values ​​greater than the pixel brightness threshold are determined as pixels constituting the target light spot, thereby determining the size of the target angle according to the current position of the target light spot. Of course, it is not limited to this, and the identification of the target light spot can also be achieved by other methods, which will not be elaborated here.

[0084] In some embodiments, determining a target angle between the illumination beam and the first reflected beam according to the current position to implement eye tracking includes:

[0085] According to a preset light spot position, determining a target distance between the current position and the preset light spot position;

[0086] According to the corresponding relationship between the target distance and the target angle, the target angle between the illumination light beam and the first reflected light beam is determined to achieve eye tracking.

[0087] Exemplarily, the camera assembly can be calibrated in advance to determine the preset spot position of the first reflected light beam in the target light beam when the human eye is looking straight ahead. For example, the preset spot position can be located in the center of the target image by adjusting the positions of each reflection module and the camera assembly of the eye tracking device. Of course, it is not limited to this and is not limited here.

[0088] Exemplarily, the target distance between the current position and the preset spot position has a certain corresponding relationship with the target angle between the illumination beam and the first reflected beam. Please refer to the description of the eye tracking device in the embodiment of the present application, which will not be repeated here.

[0089] It should be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0090] It should also be understood that the term "and / or" used in the specification of this application and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations. It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "including a..." does not exclude the presence of other identical elements in the process, method, article or system including the element.

[0091] The serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments. The above description is only a specific implementation mode of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An eye tracking device, characterized in that: The eye tracking device comprises: A light source assembly, the light source assembly being used to provide a reproduction light beam; a holographic optical element, wherein the holographic optical element is used to reproduce the illumination light beam under the illumination of the reproduction light beam; A camera assembly is used to obtain a target image formed by a first reflected light beam obtained by reflecting the illumination light beam through a human eye, so as to realize eye tracking according to the target image.

2. The eye tracking device according to claim 1, characterized in that: The holographic optical element has a preset reflectivity, and is further used to reflect the first reflected light beam to obtain a second reflected light beam; the camera assembly is used to acquire a target image formed by a second reflected light beam obtained by reflecting the first reflected light beam through the holographic optical element.

3. The eye tracking device according to claim 1, characterized in that: The holographic optical element has a preset transmittance, and the eye tracking device also includes a first reflection module, which is used to reflect the first reflected light beam to obtain a second reflected light beam; the camera assembly is used to obtain a target image formed by a second reflected light beam obtained by reflecting the first reflected light beam through the first reflection module.

4. The eye tracking device according to claim 2 or 3, characterized in that: The eye tracking device also includes a second reflection module, which is used to reflect the second reflected light beam to obtain a third reflected light beam, and the third reflected light beam is used to form a target light spot in the target image of the camera assembly.

5. The eye tracking device according to claim 4, characterized in that: The eye tracking device also includes a spectroscopic module, which is arranged at a position relative to the light source assembly and the camera assembly, and is used to reflect a fourth reflected light beam from the third reflected light beam to form the target light spot in the target image.

6. The eye tracking device according to claim 5, characterized in that: The light splitting module comprises a semi-reflecting and semi-mirror lens, on which a polarization optical element is arranged.

7. A near-eye display device, characterized in that: The near-eye display device comprises the eye tracking device according to any one of claims 1-6.

8. The near-eye display device according to claim 7, characterized in that: The near-eye display device further includes a display light source assembly and an optical waveguide assembly, wherein the display light source assembly is used to provide an image display light beam; The optical waveguide component is provided with a coupling module and a coupling module. The coupling module is used to couple the image display light beam into the optical waveguide component for transmission, and the coupling module is used to couple the image display light beam transmitted in the optical waveguide component out of the optical waveguide component. The image display light beam is used to display a preset virtual image.

9. An eye tracking method, characterized in that: The eye tracking method is applied to the eye tracking device according to any one of claims 1 to 8, wherein the eye tracking device comprises: A light source assembly, the light source assembly being used to provide a reproduction light beam; a holographic optical element, the holographic optical element being used to reproduce the illumination light beam under the illumination of the reproduction light beam; A camera assembly, the camera assembly is used to obtain a target image formed by a first reflected light beam obtained by reflecting the illumination light beam through a human eye; The method comprises: Acquire a target image of the camera assembly; Identifying a target light spot in the target image to obtain a current position of the target light spot; According to the current position, a target angle between the illumination light beam and the first reflected light beam is determined to achieve eye tracking.

10. The eye tracking method according to claim 9, characterized in that: The step of determining a target angle between the illumination light beam and the first reflected light beam according to the current position to implement eye tracking includes: According to a preset light spot position, determining a target distance between the current position and the preset light spot position; According to the corresponding relationship between the target distance and the target angle, the target angle between the illumination light beam and the first reflected light beam is determined to achieve eye tracking.

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