TWI843630B - The method of preparing eye-tracking glasses - Google Patents

Abstract

This application provides a method for preparing eye-tracking glasses. The method comprises the following steps: providing a substrate portion, wherein the substrate portion includes a functional film positioned on the outer surface of the substrate portion as a first surface, and the first surface is raised and equipped with electronic components; applying a matching material to the first surface through spraying, wherein the matching material is accumulated at the gap between the first surface and the connection of the electronic components; providing a sealing layer to cover the first surface, the electronic components, and the matching material located on the first surface; providing a lens to connect with the functional film and the electronic components through the sealing layer.

Description

Method for preparing eye tracking glasses

This application relates to the field of head-mounted device technology, and in particular to a method for preparing eye-tracking glasses.

Eye tracking technology is a technology that uses various detection methods such as mechanics, electronics, and optics to obtain the user's current "gaze direction". With the rapid development of computer vision, artificial intelligence technology, and digital technology, eye tracking technology has become a hot research field and has been widely used in the field of human-computer interaction. For example, it can be applied to virtual reality, augmented reality, vehicle assisted driving, user experience, cognitive impairment diagnosis, and many other fields. When eye tracking technology is implemented in head-mounted products such as virtual reality equipment and augmented reality equipment, it is usually necessary to set up light sources and camera devices in the head-mounted products. In order to ensure the user experience and avoid blocking the user's line of sight, the light source needs to be set in an appropriate position.

Eye tracking technology can generally be divided into pupil-corneal reflection method, retinal imaging, calculating the visual center after eye modeling, retinal reflected light intensity, corneal reflected light intensity and other methods. In the above-mentioned eye tracking technology classification, the first pupil-corneal reflection method, the second retinal imaging method, and the third method of calculating the visual center after eye modeling all require the use of cameras. Among them, the first pupil-corneal reflection method and the second retinal imaging method both use a calculator to process the image of the eye and extract feature points to obtain the visual center of the eye. The third method of calculating the visual center after eye modeling requires the use of a camera (infrared camera, depth camera) to reconstruct the eye into a three-dimensional model and then calculate the visual center. The fourth type of retinal reflected light intensity and the fifth type of corneal reflected light intensity can only be obtained by one or more photosensitive sensor elements to capture the intensity of the eye reflected light to obtain the visual center of the eye. The reflected light may come from the center of the cornea or the retina. Obviously, there are certain advantages in using photosensitive sensors to achieve eye tracking. However, in the prior art, the process steps for setting the photosensitive sensor on the lens are mainly: first encapsulate the substrate with the photosensitive sensor, and then adhere the solid optical glue after the encapsulation is completed, and make the photosensitive sensor adhere to the surface of the lens through the solid optical glue. However, this method is very lengthy and requires multiple coating, drying, shaping and other processes. It is difficult to control the uniformity of each layer, and it is more likely to produce bubbles and cause the yield of the final product to be unstable. How to use a stable and efficient process to produce glasses with light-sensitive sensors that can realize eye tracking technology is something that technicians in this field need to consider.

In order to solve the problems in the prior art, this application provides a method for preparing eye tracking glasses.

The present application embodiment provides a method for preparing eye tracking glasses, comprising the following steps: providing a substrate portion, the substrate portion including a functional film, the surface of the functional film located on the outermost side of the substrate portion being the first surface, the first surface convexly provided with electronic components; spraying a matching material toward the first surface by spraying, the matching material being accumulated at least at the discontinuity where the first surface is connected to the electronic components; providing a sealing layer, so that the sealing layer covers the first surface and the electronic components and the matching material disposed on the first surface; providing a lens, so that the lens is connected to the functional film and the electronic components through the sealing layer.

In one embodiment, the matching material is disposed on the first surface to form the matching layer, the side surface of the electronic component is wrapped by the matching layer, and at least part of the end of the electronic component away from the first surface is exposed through the matching layer.

In one embodiment, the thickness of the matching layer is less than the height of the electronic component protruding from the first surface.

In one embodiment, the matching material surrounds the electronic component to form a matching portion, the matching portion fills the gap between the electronic component and the first surface, and the matching portion includes an inclined connecting surface, and the inclined connecting surface is configured to obliquely connect the side surface of the electronic component and the first surface.

In one embodiment, during the process of spraying the matching material onto the first surface by spraying, a mask is provided so that the spraying material is sprayed onto the first surface through the mask, the mask shields the electronic component from the top surface of the first surface, and the side surface of the electronic component is exposed through the mask.

In one embodiment, the height of the matching material deposited on the first surface is less than 30 μm.

In one embodiment, the matching material or the sealing layer includes optical glue or optical hydrogel.

In one embodiment, the refractive index of the matching material or the sealing layer is greater than or equal to 1.

In one embodiment, the refractive index of the matching material or the sealing layer ranges from 1.48 to 1.53.

In one embodiment, the electronic components include at least one of a vertical cavity surface emitting laser and an infrared light emitting diode, and the lens is a concave lens.

It can be understood that in the preparation method of eye-tracking glasses provided by this application, a spraying process is used to fill the matching material into the gap between the first surface and the electronic component. On the one hand, the gap between the electronic component and the first surface can be reduced, and on the other hand, the gap between the electronic component and the functional film can be filled, thereby reducing the possibility of bubbles in the subsequent process of attaching the sealing layer, and improving the yield of the eye-tracking glasses preparation process.

10: Eye tracking glasses

11: Baseboard

111: Carrier plate

112: Matching film

113: Functional membrane

114: First surface

12: Electronic components

121: Side

131: Matching materials

132: Matching layer

133: Matching section

134: Inclined connection surface

14: Sealing layer

15: Lens

16: Circuit board

17: Discontinuity

S1, S2, S3, S4: Steps

Figure 1 is a schematic diagram of the process of preparing eye tracking glasses provided in an embodiment of this application.

Figure 2 is a schematic diagram of a partial process structure of a method for preparing eye tracking glasses provided in an embodiment of this application.

Figure 3 is a schematic diagram of a partial process structure of a method for preparing eye tracking glasses provided in an embodiment of this application.

Figure 4 is a schematic diagram of a partial process structure of a method for preparing eye tracking glasses provided in an embodiment of this application.

Figure 5 is a schematic diagram of a partial process structure of a method for preparing eye tracking glasses provided in an embodiment of this application.

Figure 6 is a schematic diagram of a partial process structure of a method for preparing eye tracking glasses provided in an embodiment of this application.

Figure 7 is a schematic diagram of a partial process structure of a method for preparing eye tracking glasses provided in an embodiment of this application.

Figure 8 is a schematic diagram of the structure of the functional film, electronic components, matching layer and sealing layer of the eye tracking glasses provided in an embodiment of this application.

Figure 9 is a schematic diagram of the structure of the functional film, electronic components, matching part and sealing layer of the eye tracking glasses provided in another embodiment of the present application.

The following description will refer to the accompanying drawings to more fully describe the contents of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be interpreted as limited to the exemplary embodiments described herein. These exemplary embodiments are provided to make the present application thorough and complete and to fully convey the scope of the present application to those skilled in the art. Similar figure markings represent the same or similar components.

The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, when used herein, "includes" and/or "comprising" or "including" and/or "including" or "having" and/or "having", integers, steps, operations, elements and/or components, but do not exclude the existence or addition of one or more other features, regions, integers, steps, operations, elements, components and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as those commonly understood by ordinary technicians in the field described in this application. In addition, unless explicitly defined herein, those terms as defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the relevant technology and the content of this application, and will not be interpreted as idealized or overly formal meanings.

The following content will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the elements depicted in the reference drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar figure markings or similar technical terms.

Generally, eye tracking technology can be divided into pupil-corneal reflection method, retinal image, calculating the visual center after eye modeling, retinal reflected light intensity, corneal reflected light intensity and other methods. In the above eye tracking technology classification, the first pupil-corneal reflection method, the second retinal image, and the third eye modeling and calculating the visual center all require the use of cameras. Among them, the first pupil-corneal reflection method and the second retinal image both process the image of the eye and extract feature points through a calculator to obtain the visual center of the eye. The third method of calculating the visual center after eye modeling requires the use of a camera (infrared camera, depth camera) to reconstruct the eye into a three-dimensional model and then calculate the visual center. The fourth type of retinal reflected light intensity and the fifth type of corneal reflected light intensity can only obtain the visual center of the eye through one or more photosensitive sensor elements to capture the intensity of the reflected light from the eye. The reflected light may come from the center of the cornea or the retina.

Obviously, using photosensors to achieve eye tracking has certain advantages. However, in the prior art, the process steps for placing photosensors on lenses are mainly: first encapsulate the substrate with photosensors, and then adhere solid optical glue after encapsulation, so that the photosensors are adhered to the lens surface through solid optical glue. However, this method is very lengthy and requires multiple coating, drying, shaping and other processes. It is also difficult to control the uniformity of each layer, and it is more likely to produce bubbles and cause the final product yield to be unstable. Especially at the gap between electronic components and the base film that carries the electronic components, bubbles are more likely to be generated, which has a negative impact on the yield.

Correspondingly, the present application provides a method for preparing eye tracking glasses, comprising the following steps: providing a substrate portion, the substrate portion comprising a functional film, the surface of the functional film located at the outermost side of the substrate portion being the first surface, the first surface convexly provided with electronic components; spraying a matching material toward the first surface by spraying, the matching material being accumulated at least at the discontinuity where the first surface is connected to the electronic components; providing a sealing layer, so that the sealing layer covers the first surface and the electronic components and the matching material disposed on the first surface; providing a lens, so that the lens is connected to the functional film and the electronic components through the sealing layer.

Therefore, in the preparation method of eye-tracking glasses provided in this application, a spraying process is used to fill the matching material into the gap between the first surface and the electronic component. On the one hand, the gap between the electronic component and the first surface can be reduced, and on the other hand, the gap between the electronic component and the functional film can be filled, thereby reducing the possibility of bubbles in the subsequent process of attaching the sealing layer, and improving the yield of the eye-tracking glasses preparation process.

As can be understood by technicians in this field, "electronic components" refer to components of electronic components and small machines and instruments, which are often composed of several parts and can be used in similar products.

As can be understood by technicians in this field, "vertical cavity surface emitting laser" refers to a semiconductor whose laser is emitted vertically from the top surface. Its English name is Vertical-Cavity Surface-Emitting Laser, abbreviated as VCSEL, also translated as vertical cavity surface emitting laser.

As those skilled in the art can understand, "vertical cavity surface emitting laser" refers to a diode that can emit infrared rays, also known as IR LED.

As can be understood by those skilled in the art, "polyimide" refers to a type of polymer containing an imide ring (-CO-NR-CO-) on the main chain, which has good optical properties. Its English name is Polyimide, abbreviated as PI.

As can be understood by technicians in this field, "optical adhesive" refers to materials with good light transmittance, such as OCA (Optically Clear Adhesive) or OCR (Optical Clear Resin), where OCR is liquid, also known as liquid optical adhesive, optical hydrogel or LOCA. After curing, OCR is colorless and transparent, with a light transmittance of more than 98%, and has the characteristics of low curing shrinkage and yellowing resistance.

As can be understood by those skilled in the art, the "sealing layer" can be DAF (Die Attach Film). DAF is an ultra-thin film adhesive used to connect semiconductor chips and packaging substrates, and chips to chips in the semiconductor packaging process. It can also be applied to other fields to achieve lamination and thinning of packaging.

The specific implementation of this application is described in further detail below with reference to the attached figures.

This application embodiment provides a method for preparing eye tracking glasses 10. As shown in FIG1 , the method for preparing eye tracking glasses 10 includes the following steps:

Step S1: Further in combination with FIG. 2 and FIG. 7, a substrate portion 11 is provided, the substrate portion 11 includes a functional film 113, the surface of the functional film 113 located on the outermost side of the substrate portion 11 is a first surface 114, and the first surface 114 is protrudingly provided with an electronic component 12.

In one embodiment, the electronic components 12 are arranged on the first surface 114 to achieve the pre-determination of the position of the electronic components 12. It can be understood that the functional film 113 can be used as a carrier of the electronic components 12. The mutual position relationship between multiple electronic components 12 can be determined by fixing the electronic components 12 on the first surface 114. At the same time, the wiring used to connect the electronic components 12 to each other or to the external circuit (such as the flexible circuit board 16) can also be arranged on the first surface 114. The wiring is arranged in advance by the support of the functional film 113.

It is understandable that the general electronic component 12 can be in the shape of a cube, a granular shape, a column, etc. Regardless of the regular or irregular shape of the electronic component 12, it often has a certain thickness, which is about 60μm to 180μm. This makes the electronic component 12 disposed on the first surface 114 protrude relative to the first surface 114, and there is a discontinuity between the outer surface of the protruding electronic component 12 and the first surface 114. In the subsequent processing process, the gas located at the discontinuity 17 is not easy to be discharged, and it is easy to generate bubbles inside the film layer, causing product defects. Therefore, in the subsequent step S2, a matching material 131 needs to be used to fill the discontinuity 17 to solve this problem.

In this embodiment, the electronic component 12 includes at least one of a vertical cavity surface emitting laser and an infrared light emitting diode.

It can be understood that the VCSEL and the IR LED can be applied to the eye tracking glasses 10. The VCSEL and the IR LED are arranged in the peripheral area of the eye tracking glasses 10, and the wiring connecting the VCSEL and the IR LED is led outward to the edge of the eye tracking glasses 10, so as to realize the tracking of the wearer's eyeball.

In one embodiment, the electronic component 12 may also include a component (not shown) with a signal relay function connected to the vertical cavity surface emitting laser and the infrared light emitting diode, which is used for the electrical connection between the lens 15 and the external circuit.

In this embodiment, the substrate portion 11 further includes a carrier plate 111 and a matching film 112. The matching film 112 is disposed on the surface of the carrier plate 111, and the functional film 113 is disposed on the surface of the matching film 112 away from the carrier plate 111. The first surface 114 is the surface of the functional film 113 away from the matching film 112. The functional film 113 and the matching film 112 can be separably contacted, and the electronic component 12 is located on a side of the functional film 113 away from the matching film 112. The material of the functional film 113 includes polyimide (PI).

It is understandable that the functional film 113 will be attached to the surface of the lens 15 after the subsequent process. The functional film 113 should be made of a material with good optical effect (such as polyimide, PI). Similarly, in order to minimize the impact of the functional film 113 on the optical performance of the lens 15, the functional film 113 is preferably a thinner film material. However, the thinner film material itself may have poor supporting performance, which will make the processing more difficult or have a negative impact on the overall processing efficiency. Therefore, it is necessary to introduce a hard carrier plate 111, which can be made of glass material; the functional film 113 is carried on the hard carrier plate 111, which is convenient for subsequent other processing and the layout of the electronic components 12. Considering that there may be problems with the adhesion between the glass carrier plate 111 and the functional film 113 made of polyimide, for example, the functional film 113 shrinks and produces wrinkles on the surface of the carrier plate 111 due to temperature changes. Therefore, it is necessary to further introduce a matching film 112 between the carrier plate 111 and the functional film 113 so that the functional film 113 can be better adhered to the surface of the carrier plate 111 and is not easily deformed. At the same time, the selection of the matching film 112 mainly considers the adhesion effect between the carrier plate 111 and the functional film 113, and its optical performance may be difficult to meet the requirements of the lens 15. Therefore, it is necessary to set the matching film 112 and the functional film 113 to be in detachable contact, so that the matching film 112 itself can be separated from the functional film 113 on the one hand, and the functional film 113 is easy to separate from the carrier plate 111 on the other hand.

Step S2: Further in combination with FIG. 3 and FIG. 7 to FIG. 9, the matching material 131 is sprayed toward the first surface 114 by spraying, and the matching material 131 is at least accumulated at the gap 17 where the first surface 114 is connected to the electronic component 12.

It can be understood that there is a discontinuity 17 between the electronic component 12 and the first surface 114. In order to solve the bubble problem as mentioned above, it is necessary to direct the granulated matching material 131 directly to the discontinuity 17 by spraying, and continue to spray so that the matching material 131 is accumulated at the discontinuity 17 to reach a predetermined thickness, thereby reducing the height difference between the outer surface of the electronic component 12 and the first surface 114. For different electronic components 12 and their corresponding discontinuities 17 of different heights, the specific parameters of the spraying process can be adjusted to achieve a suitable accumulation effect.

In one embodiment, during the process of spraying the matching material 131 onto the first surface 114 by spraying, a mask (not shown) is provided to allow the matching material 131 to be sprayed onto the first surface 114 through the mask.

It can be understood that the mask may include a solid part and an opening part opened on the solid part, wherein the solid part is used to block the matching material 131 from passing through, so as to prevent the matching material 131 from being set in a non-specified area; the opening part is used to allow the matching material to pass through, so as to ensure that the matching material 131 can be more accurately deposited at the discontinuity 17 or other preset positions; thereby ensuring the depositing effect of the matching material 131 while avoiding a negative impact on the overall optical performance of the eye tracking glasses 10.

Further combined with FIG. 8 , in one embodiment, the matching material 131 is disposed on the first surface 114 to form a matching layer 132. The side surface 121 of the electronic component 12 is wrapped by the matching layer 132, and at least part of the end of the electronic component 12 away from the first surface 114 is exposed through the matching layer 132.

In this embodiment, the thickness of the matching layer 132 is less than the height of the electronic component 12 protruding from the first surface 114.

It can be understood that the matching layer 132 can be set as a continuous flat layer structure, and the continuous matching layer 132 can be formed through a relatively uniform spraying process. On the one hand, the continuous matching layer 132 can reduce the difficulty of forming the matching layer 132; on the other hand, in the subsequent steps, the continuous sealing layer 14 is connected to the functional film 113 through the continuous matching layer 132, and the composite optical film layer composed of the sealing layer 14, the matching layer 132, and the functional film 113 has a small difference in structure and thickness at various locations, which can improve its overall optical uniformity.

Further combined with FIG. 9 , in one embodiment, the matching material 131 surrounds the electronic component 12 to form a matching portion 133. The matching portion 133 is mainly disposed at the discontinuity 17 between the electronic component 12 and the first surface 114. The matching portion 133 includes an inclined connecting surface 134 located at the outermost side thereof. The inclined connecting surface 134 is configured to obliquely connect the side surface 121 of the electronic component 12 and the first surface 114. The other parts of the matching portion 133 are filled in the area formed by the inclined connecting surface 134, the side surface 121 and the first surface 114, so that the direct discontinuity between the electronic component 12 and the first surface 114 is reduced.

It can be understood that by directly stacking the matching part 133 at the discontinuity 17 and configuring the inclined connection surface 134 to be inclined to connect the side surface 121 and the first surface 114 of the electronic component 12, the discontinuity can be eliminated to a certain extent. The setting area of the matching material 131 is reduced, so that the matching material 131 exists in the form of the matching part 133. While eliminating the discontinuity, it can also avoid that the matching material 131 covers more other areas of the functional film 113. In addition, it avoids the negative impact on the overall optical performance of the eye tracking glasses 10 caused by setting multiple layers of materials with different refractive indices.

In one embodiment, the height of the matching material 131 deposited on the first surface 114 is less than 30 μm.

It is understandable that the matching material 131 is formed by spraying, and the spraying method is generally not efficient enough compared to the direct film bonding method. The height of the matching material 131 is controlled to be less than 30 μm, while avoiding the generation of bubbles at the discontinuity 17 as much as possible, and the preparation process of the eye tracking glasses 10 can also maintain a high efficiency.

Step S3: Further in combination with FIG. 4 to FIG. 7 , a sealing layer 14 is provided so that the sealing layer 14 covers the first surface 114 and the electronic components 12 and matching material 131 disposed on the first surface 114 .

It is understandable that the sealing layer 14 can be DAF (Die Attach Film).

In one embodiment, the matching material 131 or the sealing layer 14 includes optical glue or optical hydrogel, specifically OCA (Optically Clear Adhesive) or OCR (Optical Clear Resin).

In one embodiment, the refractive index of the matching material 131 or the sealing layer 14 is greater than or equal to 1.

In one embodiment, the refractive index of the matching material 131 or the sealing layer 14 ranges from 1.48 to 1.53.

It can be understood that the refractive index of the matching material 131 or the sealing layer 14 is controlled to be greater than or equal to 1, preferably 1.48 to 1.53, so that the eye tracking glasses 10 have better optical performance as a whole. The refractive index of the matching material 131 or the sealing layer 14 can be specifically 1.49, 1.50, 1.51 and 1.52.

It can be understood that the refractive index of the matching material 131 and the sealing layer 14 should be as similar as possible; preferably, the refractive index of the matching material 131 and the sealing layer 14 is the same; more preferably, the refractive index of the matching material 131, the sealing layer 14 and the functional film 113 are all the same.

Step S4: Further combined with Figures 4 to 7, provide a lens 15, so that the lens 15 is connected to the functional film 113 and the electronic component 12 through the sealing layer 14.

In one embodiment, further in combination with FIG. 5 , a lens 15 is provided and pressed onto the surface of the sealing layer 14. After the pressing process is completed, the sealing layer 14 is cured by, for example, heating or light curing to achieve connection between the lens 15 and the functional film 113 and the electronic component 12.

In one embodiment, further in combination with FIG. 6 , the excess portion of the functional film 113 and the sealing layer 14 that exceeds the edge of the lens 15 is removed and shaped.

It is understandable that in the process of setting the functional film 113, the matching material 131 and the sealing layer 14, the size of the functional film 113, the matching material 131 and the sealing layer 14 can be set to be larger than the carrier plate 111 or the lens 15, and the excess part needs to be shaped after the attachment is completed.

In one embodiment, further combined with FIG. 7 , the electronic component 12 is electrically connected to the external circuit board 16, and the periphery of the lens 15 is sealed.

It is understandable that after the connection between the circuit board 16 and the electronic component 12 is achieved, the circuit can be further tested through the connected lines to ensure that the product can be powered on and work normally.

It can be understood that in the preparation method of the eye tracking glasses 10 provided in the present application, the matching material 131 is filled into the gap 17 where the first surface 114 and the electronic component 12 are connected by a spraying process. On the one hand, the gap between the electronic component 12 and the first surface 114 can be reduced, and on the other hand, the gap 17 where the electronic component and the functional film 113 are connected can be filled, thereby reducing the possibility of bubbles generated in the subsequent process of attaching the sealing layer 14, thereby improving the yield rate of the preparation process of the eye tracking glasses 10.

It is understandable that the contents shown in Figures 2 to 9 of this application are used to illustrate the relative position relationship of each component, and do not limit the size, thickness, ratio, etc. of each component. The thickness or size ratio between the components shown in the figure can be changed within a feasible range according to the actual situation.

In the above, the specific implementation of this application is described with reference to the attached drawings. However, ordinary technicians in this field can understand that various changes and substitutions can be made to the specific implementation of this application without departing from the spirit and scope of this application. These changes and substitutions are within the scope defined by this application.

11: Baseboard

111: Carrier plate

112: Matching film

113: Functional membrane

114: First surface

12: Electronic components

131: Matching materials

14: Sealing layer

15: Lens

Claims (10)

A method for preparing eye tracking glasses, the improvement of which is that it includes the following steps: providing a substrate portion, the substrate portion including a functional film, the surface of the functional film located on the outermost side of the substrate portion being the first surface, the first surface convexly provided with electronic components; spraying a matching material toward the first surface by spraying, the matching material at least being accumulated at the discontinuity where the first surface is connected to the electronic components; providing a sealing layer, so that the sealing layer covers the first surface and the electronic components and the matching material disposed on the first surface; providing a lens, so that the lens is connected to the functional film and the electronic components through the sealing layer. The method for preparing eye tracking glasses as described in claim 1, wherein the matching material is disposed on the first surface to form a matching layer, the side surface of the electronic component is wrapped by the matching layer, and at least part of the end of the electronic component away from the first surface is exposed through the matching layer. A method for preparing eye tracking glasses as described in claim 2, wherein the thickness of the matching layer is less than the height of the electronic component protruding from the first surface. The method for preparing eye tracking glasses as described in claim 1, wherein the matching material surrounds the electronic component to form a matching portion, the matching portion fills the gap between the electronic component and the first surface, and the matching portion includes an inclined connecting surface, and the inclined connecting surface is configured to obliquely connect the side surface of the electronic component and the first surface. A method for preparing eye tracking glasses as described in claim 1, wherein, in the process of spraying the matching material onto the first surface by spraying, a mask is provided so that the spraying material is sprayed onto the first surface through the mask, the mask shields the electronic components away from the top surface of the first surface, and the side surfaces of the electronic components are exposed through the mask. The method for preparing eye tracking glasses as described in claim 1, wherein the height of the matching material deposited on the first surface is less than 30 μm. The method for preparing eye tracking glasses as described in claim 1, wherein the matching material or the sealing layer includes optical glue or optical hydrogel. A method for preparing eye tracking glasses as described in claim 1, wherein the refractive index of the matching material or the sealing layer is greater than or equal to 1. The method for preparing eye tracking glasses as described in claim 1, wherein the refractive index of the matching material or the sealing layer ranges from 1.48 to 1.53. The method for preparing eye tracking glasses as described in claim 1, wherein the electronic components include at least one of a vertical cavity surface emitting laser and an infrared light emitting diode, and the lens is a concave lens.

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