Optical waveguide lens, method for manufacturing optical waveguide lens, and display device

Abstract

The application provides an optical waveguide lens, a preparation method of the optical waveguide lens and a display device. The optical waveguide lens comprises a waveguide sheet, a protective sheet, an annular adhesive layer and an air valve assembly. The protective sheet is used for protecting diffraction microstructures on the surface of the waveguide sheet. The annular adhesive layer is arranged along the edge region of the waveguide sheet or the protective sheet, and is used for connecting the waveguide sheet and the protective sheet. The air valve assembly is arranged on the waveguide sheet or the protective sheet or the annular adhesive layer, and is used for blocking the air discharge in the cavity between the waveguide sheet and the protective sheet, so that the air pressure in the cavity between the waveguide sheet and the protective sheet is greater than or equal to the air pressure of the environment in which the optical waveguide lens is located. The application can maintain the state that the waveguide sheet and the protective sheet are separated by the gas in the cavity, so that the waveguide sheet and the protective sheet will not contact when the protective sheet and / or the waveguide sheet are deformed due to external factors, and the light energy loss and stray light phenomenon caused by the contact between the protective sheet and the waveguide sheet are avoided.

Description

Technical Field

[0001] This application relates to the field of optical waveguide technology, and in particular to an optical waveguide lens, a method for preparing the optical waveguide lens, and a display device. Background Technology

[0002] The protective sheet and waveguide sheet in existing optical waveguide lenses are generally made of resin materials, or a mixture of resin and glass materials, giving the optical waveguide lenses the characteristics of thinness and light weight. However, due to the good flexibility of resin materials, optical waveguide lenses are easily affected by external factors during daily use, causing deformation of the protective sheet or waveguide sheet. Furthermore, the close proximity between the protective sheet and waveguide sheet makes them prone to contact after deformation, thus altering the light propagation path within the waveguide sheet, leading to light energy loss and the generation of stray light. Summary of the Invention

[0003] This application provides an optical waveguide lens, a method for preparing the optical waveguide lens, and a display device, aiming to solve the problem that the protective sheet and waveguide sheet in the optical waveguide lens are prone to deformation and contact when affected by external factors, thereby causing changes in the light propagation path in the waveguide sheet.

[0004] In a first aspect, this application provides an optical waveguide lens, comprising: Waveguide sheet, the waveguide sheet is equipped with diffraction microstructure; Protective sheet, used to protect the diffraction microstructures on the surface of waveguide sheet; An annular adhesive layer is provided along the edge region of the waveguide sheet or protective sheet, and the annular adhesive layer is used to connect the waveguide sheet and the protective sheet. The air valve assembly is installed on the waveguide sheet, protective sheet, or annular adhesive layer. The air valve assembly is used to block the gas from escaping from the cavity between the waveguide sheet and the protective sheet, so that the air pressure in the cavity between the waveguide sheet and the protective sheet is greater than or equal to the air pressure of the environment in which the optical waveguide lens is located.

[0005] In one example, the valve assembly includes a flexible diaphragm and a through-hole, which is formed on a waveguide sheet, a protective sheet, or an annular adhesive layer. The fixed end of the flexible diaphragm is connected to the waveguide sheet, the protective sheet, or the annular adhesive layer, and the movable end of the flexible diaphragm covers the through-hole.

[0006] In one example, the valve assembly includes a seal for sealing the through-hole.

[0007] In one example, the valve assembly is a one-way inlet valve, with the inlet end facing the outside of the optical waveguide lens and the outlet end facing the inside of the cavity.

[0008] In one example, the valve assembly is disposed on the waveguide sheet, and the distance between the position of the valve assembly and the position of the diffraction microstructure is greater than or equal to a preset threshold.

[0009] Secondly, this application also provides a method for fabricating an optical waveguide lens, the optical waveguide lens comprising a waveguide sheet, a protective sheet, an annular adhesive layer, and a valve assembly, the method comprising: The valve assembly is mounted on the waveguide plate or protective plate; The waveguide sheet and the protective sheet are bonded together using an annular adhesive layer to obtain the lens to be processed; The lens to be processed is subjected to gas filling to obtain an optical waveguide lens. The gas valve assembly is used to block the gas from escaping from the cavity in the optical waveguide lens so that the gas pressure in the cavity is greater than or equal to the gas pressure of the environment in which the optical waveguide lens is located.

[0010] In one example, a gas-filling process is performed on the lens to be processed to obtain an optical waveguide lens, comprising: The optical waveguide lens is obtained by applying pressure or temperature control to the lens to be processed.

[0011] In one example, the lens to be processed undergoes temperature control treatment, including: The temperature of the lens to be processed is reduced to the target temperature, which is lower than room temperature. After a preset time, the lens to be treated is placed in a room temperature environment to allow the temperature of the lens to return to room temperature.

[0012] In one example, a gas-filling process is performed on the lens to be processed to obtain an optical waveguide lens, comprising: After pressurizing or cooling the lens to be processed, the valve assembly on the lens is sealed to obtain the optical waveguide lens.

[0013] Thirdly, this application also provides a display device, which includes an optical engine and an optical waveguide lens as provided in the first aspect, the optical waveguide lens being used to directionally transmit optical signals emitted from the optical engine to a target area.

[0014] This application provides an optical waveguide lens, which is composed of a waveguide sheet, a protective sheet, an annular adhesive layer, and an air valve assembly. The air valve assembly allows external air to enter the cavity between the waveguide sheet and the protective sheet, preventing the air in the cavity from escaping. This maintains the air pressure in the cavity between the waveguide sheet and the protective sheet higher than the air pressure of the current environment of the optical waveguide lens, thus ensuring that the waveguide sheet and the protective sheet are always in a state of being stretched apart by the gas in the cavity. This prevents the waveguide sheet and the protective sheet from contacting each other when the protective sheet and / or the waveguide sheet are deformed due to external factors, avoiding light energy loss and stray light phenomena caused by contact between the protective sheet and the waveguide sheet. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1a This is a schematic diagram of an explosion of an optical waveguide lens in the prior art; Figure 1b for Figure 1a A cross-sectional view of the provided optical waveguide lens; Figure 2a This is an exploded view of an optical waveguide lens provided in one embodiment of this application; Figure 2b for Figure 2a A cross-sectional view of the provided optical waveguide lens; Figure 3 A schematic diagram illustrating a usage scenario of a one-way intake valve provided in an embodiment of this application; Figure 4 A cross-sectional view of an optical waveguide lens provided in another embodiment of this application; Figure 5a A cross-sectional view of an optical waveguide lens provided in another embodiment of this application; Figure 5b for Figure 5a A schematic diagram illustrating one application scenario of the provided optical waveguide lens; Figure 5c for Figure 5a A schematic diagram illustrating another application scenario of the provided optical waveguide lens; Figure 6 A cross-sectional view of an optical waveguide lens provided in another embodiment of this application; Figure 7 A flowchart illustrating a method for fabricating an optical waveguide lens according to an embodiment of this application; Figure 8 This is a schematic diagram illustrating the fabrication process of an optical waveguide lens provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the described order. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0019] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] Please refer to Figure 1a and Figure 1b , Figure 1a This is an exploded schematic diagram of the optical waveguide lens 10 in the prior art. Figure 1b for Figure 1a A cross-sectional view of the provided optical waveguide lens 10.

[0021] like Figure 1a and Figure 1b As shown, in the prior art, the optical waveguide lens 10 is assembled using a waveguide sheet 12, an annular adhesive layer 13, and a protective sheet 11. The optical waveguide lens 10 is mostly used in AR display devices, such as AR glasses, where light propagates through the waveguide sheet 12. The waveguide sheet 12 and the protective sheet 11 in the optical waveguide lens 10 are mostly made of resin, which is easily deformed by external factors such as temperature, air pressure, and external forces. This causes the protective sheet 11 and the waveguide sheet 12 to come into contact. When the protective sheet 11 and the waveguide sheet 12 are in contact, the light propagating in the waveguide sheet 12 will enter the protective sheet 11 at the contact point, resulting in light energy loss and stray light formation, thus leading to poor display performance of the AR glasses.

[0022] Please refer to Figure 2a and Figure 2b , Figure 2a This is an exploded view of the optical waveguide lens 10 provided in one embodiment of this application. Figure 2b for Figure 2a A cross-sectional view of the provided optical waveguide lens 10.

[0023] As shown in the figure, the optical waveguide lens 10 provided in this application includes a waveguide sheet 12, a protective sheet 11, an annular adhesive layer 13, and a valve assembly 14. The waveguide sheet 12 has a diffraction microstructure for coupler input and output of light. The protective sheet 11 protects the diffraction microstructure. The annular adhesive layer 13 is disposed along the edge region of either the waveguide sheet 12 or the protective sheet 11 to connect them. The annular adhesive layer 13 bonds the protective sheet 11 and the waveguide sheet 12, allowing the protective sheet 11 to protect the diffraction microstructure on the waveguide sheet 12, thereby extending the lifespan of the diffraction microstructure.

[0024] The air valve assembly 14 is disposed on the waveguide sheet 12, the protective sheet 11, or the annular adhesive layer 13. The air valve assembly 14 allows external air from the optical waveguide lens 10 to enter the cavity between the waveguide sheet 12 and the protective sheet 11, and blocks the gas from escaping from the cavity between the waveguide sheet 12 and the protective sheet 11, thereby maintaining the air pressure in the cavity between the waveguide sheet 12 and the protective sheet 11 to be greater than or equal to the air pressure of the current environment in which the optical waveguide lens 10 is located.

[0025] It should be understood that since the air pressure in the cavity between the waveguide 12 and the protective plate 11 is greater than or equal to the air pressure of the environment where the optical waveguide lens 10 is located, the waveguide 12 and the protective plate 11 will always be in a state of being stretched apart by the gas in the cavity. This prevents the waveguide 12 and / or the protective plate 11 from coming into contact when they are deformed by external factors, thus avoiding light energy loss and stray light phenomena.

[0026] Please see Figure 3 , Figure 3 This is a schematic diagram illustrating a usage scenario of a one-way air intake valve provided in an embodiment of this application.

[0027] In one embodiment, the air valve assembly 14 is a one-way air inlet valve. The air inlet end of the one-way air inlet valve faces the outside of the optical waveguide lens 10, and the air outlet end of the one-way air inlet valve faces the inside of the cavity. Gas outside the optical waveguide lens 10 flows in from the air inlet end of the one-way air inlet valve and flows out to the cavity from the air outlet end of the one-way air inlet valve.

[0028] The one-way intake valve is located on the protective plate 11 (e.g.) Figure 2a and Figure 2b Furthermore, the one-way intake valve can only allow airflow from the intake end to the outlet end, but cannot allow airflow from the outlet end to the intake end (e.g., Figure 3 As shown in the figure, the dashed line is used to indicate airflow. Therefore, when the air pressure in the cavity is greater than or equal to the air pressure of the environment where the optical waveguide lens 10 is located, the air flow will not cause the air pressure in the cavity to balance with the air pressure of the environment where the optical waveguide lens 10 is located, so as to maintain the state in which the air pressure in the cavity is greater than or equal to the air pressure of the environment where the optical waveguide lens 10 is located.

[0029] Please see Figure 4 , Figure 4 This is a cross-sectional view of an optical waveguide lens 10 provided in another embodiment of this application.

[0030] like Figure 4As shown, the one-way air intake valve can be set in the ambient adhesive layer. It should be understood that the one-way air intake valve set in the annular adhesive layer 13 has the same effect as the one-way air intake valve set in the protective sheet 11 or the waveguide sheet 12. Both can make the air pressure in the cavity between the waveguide sheet 12 and the protective sheet 11 greater than or equal to the air pressure of the environment where the optical waveguide lens 10 is located. Therefore, this application does not limit the specific manner in which the one-way air intake valve is set in the waveguide sheet 12, the protective sheet 11 or the annular adhesive layer 13.

[0031] Please see Figure 5a , Figure 5b and Figure 5c , Figure 5a A cross-sectional view of the optical waveguide lens 10 provided in another embodiment of this application. Figure 5b for Figure 5a A schematic diagram of one application scenario for the provided optical waveguide lens 10. Figure 5c for Figure 5a A schematic diagram of another application scenario for the provided optical waveguide lens 10.

[0032] In one embodiment, the valve assembly 14 includes a flexible membrane 141 and a through hole 15; the through hole 15 is formed on the waveguide sheet 12, the protective sheet 11, or the annular adhesive layer 13, the fixed end 1411 of the flexible membrane 141 is connected to the waveguide sheet 12, the protective sheet 11, or the annular adhesive layer 13, and the movable end 1412 of the flexible membrane 141 covers the through hole 15.

[0033] For example, the through hole 15 can be formed on the waveguide sheet 12, the protective sheet 11, or the annular adhesive layer 13. A flexible membrane 141 is connected to the waveguide sheet 12, the protective sheet 11, or the annular adhesive layer 13 with the through hole 15, so that the movable end 1412 of the flexible membrane 141 can cover the through hole 15. Specifically, the fixed end 1411 of the flexible membrane 141 is connected to the surface of the waveguide sheet 12 facing the cavity, or to the surface of the protective sheet 11 facing the cavity, or to the surface of the annular adhesive layer 13 facing the cavity.

[0034] In a specific implementation method Figure 5a This illustrates the case where the flexible membrane 141 is connected to the protective sheet 11, so as to Figure 5a Taking an example, a through hole 15 is provided on the protective sheet 11. The fixed end 1411 of the flexible film 141 is connected to the surface of the protective sheet 11 facing the cavity. The movable end 1412 of the flexible film 141 can cover the through hole 15 and can be freely bent. When the air pressure outside the optical waveguide lens 10 is greater than the air pressure inside the cavity of the optical waveguide lens 10, gas can enter through the through hole 15 and push open the movable end 1412 of the flexible film 141 to enter the cavity inside the optical waveguide lens 10 (e.g., Figure 5b(As shown); When the air pressure outside the optical waveguide lens 10 is lower than the air pressure inside the cavity of the optical waveguide lens 10, the gas tends to flow out of the optical waveguide lens 10 through the through hole 15. However, the gas will push the movable end 1412 of the flexible membrane 141 towards the through hole 15, and the flexible membrane 141 will cover the through hole 15 to achieve a sealing effect, thereby preventing the gas from escaping from the cavity to the outside of the optical waveguide lens 10 (e.g. Figure 5c As shown), to maintain the air pressure inside the cavity greater than or equal to the air pressure of the environment in which the optical waveguide lens 10 is located.

[0035] Please see Figure 6 , Figure 6 A cross-sectional view of an optical waveguide lens 10 provided in another embodiment of this application.

[0036] In one embodiment, the valve assembly 14 includes a seal 16 for sealing the through hole 15.

[0037] For example, when the air pressure in the cavity inside the optical waveguide lens 10 is greater than or equal to the air pressure of the environment in which the optical waveguide lens 10 is located, the through hole 15 and the flexible membrane 141 are used to seal the through hole 15, thereby preventing air leakage or accidental inflation of the optical waveguide lens 10 during subsequent use. It is understood that the seal 16 is a sealant or other device with sealing function, wherein the seal 16 can provide a permanent seal or an openable / closable seal for the through hole 15.

[0038] In one embodiment, the air valve assembly 14 is disposed on the waveguide sheet 12, and the distance between the disposed position of the air valve assembly 14 and the disposed position of the diffraction microstructure is greater than or equal to a preset threshold.

[0039] For example, the air valve assembly 14 is disposed on the waveguide sheet 12, and the distance between the air valve assembly 14 and the diffraction microstructure is greater than or equal to a preset threshold, so as to avoid the air valve assembly 14 being too close to the diffraction microstructure and causing impact or damage to the diffraction microstructure.

[0040] Please see Figure 7 , Figure 7 This is a flowchart illustrating a method for fabricating an optical waveguide lens 10 according to an embodiment of this application.

[0041] For example, the method for fabricating the optical waveguide lens 10 is used to fabricate the optical waveguide lens 10 provided in the above embodiments. The method for fabricating the optical waveguide lens 10 includes steps S101 to S103.

[0042] Step S101: Place the air valve assembly 14 on the waveguide plate 12 or the protective plate 11.

[0043] For example, the step of setting the valve assembly 14 on the waveguide plate 12 or the protective plate 11 is completed by opening a through hole 15 in the waveguide plate 12 or the protective plate 11 and connecting the flexible membrane 141 to the waveguide plate 12 or the protective plate 11. Alternatively, the step of setting the valve assembly 14 on the waveguide plate 12 or the protective plate 11 is completed by opening an assembly part for assembling a one-way air intake valve and assembling the one-way air intake valve on the waveguide plate 12 or the protective plate 11.

[0044] It should be understood that this application does not limit the specific components of the valve assembly 14. The valve assembly 14 can also be disposed on the annular adhesive layer 13. For example, the valve assembly 14 can be placed in the edge area of ​​the waveguide sheet 12 or the protective sheet 11. When the annular adhesive layer 13 is coated, the valve assembly 14 can be connected to the waveguide sheet 12 and the protective sheet 11 respectively through the annular adhesive layer 13.

[0045] Step S102: The waveguide sheet 12 and the protective sheet 11 are bonded together using the annular adhesive layer 13 to obtain the lens to be processed; For example, the annular adhesive layer 13 can be coated on the edge region of the waveguide sheet 12 or the protective sheet 11, and the protective sheet 11 or the waveguide sheet 12 can be bonded to the annular adhesive layer 13 to obtain the lens to be processed.

[0046] Step S103: Perform gas filling treatment on the lens to be processed to obtain optical waveguide lens 10. The gas valve assembly 14 is used to block the gas from being discharged from the cavity in the optical waveguide lens 10 so that the gas pressure in the cavity is greater than or equal to the gas pressure of the environment in which the optical waveguide lens 10 is located.

[0047] For example, the lens to be processed is subjected to a gas-filling process, such that the air pressure in the cavity of the optical waveguide lens 10 is greater than or equal to the air pressure of the environment in which the optical waveguide lens 10 is located, thereby obtaining the optical waveguide lens 10. It should be noted that the environment in which the optical waveguide lens 10 is located here is used to indicate the environment in which the optical waveguide lens 10 is located during daily use by the user, wherein the optical waveguide lens 10 is used to be assembled into a display device, such as AR (Augmented Reality) glasses, for user use.

[0048] Please see Figure 8 , Figure 8 This is a schematic diagram of the fabrication process of the optical waveguide lens 10 provided in an embodiment of this application.

[0049] The fabrication process of the optical waveguide lens 10 is illustrated using the example of the gas valve assembly 14 on the lens to be processed, which includes a flexible membrane 141 and a through hole 15. The protective sheet 11 has a through hole 15. The fixed end 1411 of the flexible membrane 141 is connected to the protective sheet 11, and the movable end 1412 of the flexible membrane 141 can be freely bent and can cover the through hole 15. After obtaining the lens to be processed, the lens is filled with gas using an inflation device 20 to obtain the optical waveguide lens 10. The gas valve assembly 14 can block the gas from escaping from the cavity in the optical waveguide lens 10, thereby maintaining the air pressure in the cavity at a level greater than or equal to the air pressure of the environment in which the optical waveguide lens 10 is located.

[0050] In one embodiment, the process of gas filling the lens to be processed to obtain an optical waveguide lens 10 includes: pressurizing or temperature controlling the lens to be processed to obtain the optical waveguide lens 10.

[0051] In the specific implementation process, taking the inflation device 20 as a closed pressurization container and the air valve assembly 14 including a flexible membrane 141 and a through hole 15 as an example, the lens to be processed is placed in the closed pressurization container for pressurization. For example, the adjustable pressure range of the sealed pressurized container is between 0.1 MPa and 0.2 MPa. After the lens to be processed is placed in the sealed pressurized container, the pressure inside the sealed pressurized container is slowly increased. At this time, since the external pressure of the lens to be processed is greater than the pressure inside the cavity of the lens to be processed, the airflow tends to enter the cavity of the lens to be processed. Therefore, the gas outside the lens to be processed will pass through the through hole 15 and push open the flexible membrane 141 to enter the cavity of the lens to be processed to achieve pressure balance. When the pressure in the cavity of the lens to be processed reaches the pressure value set by the sealed pressurized container (such as 0.11 MPa), that is, after pressure balance is achieved, the gas filling process of the lens to be processed is ended and the optical waveguide lens 10 is obtained. The optical waveguide lens 10 is taken out of the sealed pressurized container. It can be understood that the pressure in the cavity of the optical waveguide lens 10 taken out of the sealed pressurized container is greater than or equal to the pressure of the environment in which the optical waveguide lens 10 is located, such as atmospheric pressure.

[0052] In one embodiment, the temperature control treatment of the lens to be treated includes: reducing the temperature of the lens to be treated to a target temperature, the target temperature being lower than room temperature; and after a preset time, placing the lens to be treated in a room temperature environment to allow the temperature of the lens to be treated to return to room temperature.

[0053] In a specific embodiment, the inflation device 20 includes a temperature control device that can cool the lens to be processed in an environment connected to the atmosphere. For example, the temperature control device can reduce the temperature of the lens to be processed to a target temperature and maintain the temperature of the lens to be processed at the target temperature for a preset period of time. Understandably, during the cooling process, the gas volume inside the cavity of the lens to be processed decreases as the temperature drops, causing the gas pressure inside the cavity to be lower than the original ambient air pressure of the optical waveguide lens 10. Therefore, air from outside the lens to be processed is drawn into the cavity through the valve assembly 14 to balance the air pressure. After a preset time, the cavity air pressure is balanced with the ambient air pressure of the optical waveguide lens 10. At this point, the lens to be processed undergoes a temperature recovery process, such as placing it at room temperature, allowing the temperature of the lens to recover to room temperature, thus obtaining the optical waveguide lens 10. During the temperature recovery process, the gas volume inside the cavity of the lens to be processed expands as the temperature rises, and the gas cannot be discharged to the outside of the optical waveguide lens 10 through the valve assembly 14, thereby enabling the optical waveguide lens 10 to maintain a cavity air pressure greater than or equal to the ambient air pressure. It should be understood that the aforementioned sealed pressurization container for pressurization and the temperature control device for temperature control can process multiple lenses at once to achieve mass production of the optical waveguide lens 10.

[0054] In one embodiment, the process of performing a gas filling process on the lens to be processed to obtain an optical waveguide lens 10 includes: after completing the gas filling process on the lens to be processed, sealing the gas valve assembly 14 on the lens to be processed to obtain the optical waveguide lens 10.

[0055] In the specific implementation process, after the gas filling process of the lens to be processed is completed, that is, when the air pressure of the cavity of the lens to be processed is greater than or equal to the air pressure of the environment where the optical waveguide lens 10 is located, the air valve assembly 14 on the lens to be processed is sealed to obtain the optical waveguide lens 10 that can be used to assemble AR glasses.

[0056] It should be understood that the valve assembly 14 on the lens to be treated is sealed by the seal 16 or other sealing methods. The specific structure can be referred to the implementation of the various embodiments of the optical waveguide lens 10 above, and will not be described here again.

[0057] In the specific implementation process, such as Figure 8As shown, the preparation process includes at least steps a to c. Step a indicates obtaining the lens to be processed; step b indicates placing the lens to be processed in the inflation device 20 to perform gas filling treatment on the lens to be processed through the inflation device 20 to obtain the optical waveguide lens 10; after the gas filling treatment is completed, the optical waveguide lens 10 is removed from the inflation device 20; step c indicates that under normal conditions, the gas in the cavity of the optical waveguide lens 10 cannot be discharged to the outside of the optical waveguide lens 10, thus completing the preparation of the optical waveguide lens 10. In some cases, in order to avoid air leakage or accidental inflation of the optical waveguide lens 10 during daily use after leaving the factory, step d is performed on the optical waveguide lens 10, that is, sealing the through hole 15, thereby obtaining the optical waveguide lens 10 for assembly into an AR display device.

[0058] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0059] like Figure 9 As shown, this application also provides a display device, which includes an optical engine and an optical waveguide lens 10, wherein the optical waveguide lens 10 is the optical waveguide lens 10 provided in any of the above embodiments; the optical waveguide lens 10 is used to directionally transmit the optical signal emitted by the optical engine to the target area.

[0060] For example, the optical waveguide lens 10 can couple the optical signal emitted from the optical engine to the optical waveguide lens 10 and couple the light out in the coupling area of ​​the optical waveguide lens 10, so that a user wearing a display device can observe the corresponding image in the target area. Specifically, the display device is, for example, AR glasses.

[0061] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0062] It should also be understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, herein, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0063] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above descriptions are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An optical waveguide lens, characterized in that, include: Waveguide sheet, wherein the waveguide sheet is provided with a diffraction microstructure; A protective sheet, wherein the protective sheet is used to protect the diffraction microstructures on the surface of the waveguide sheet; An annular adhesive layer is provided along the edge region of the waveguide sheet or the protective sheet, and the annular adhesive layer is used to connect the waveguide sheet and the protective sheet; An air valve assembly is disposed on the waveguide sheet, the protective sheet, or the annular adhesive layer. The air valve assembly allows external air from the optical waveguide lens to enter the cavity between the waveguide sheet and the protective sheet, and blocks the gas from escaping from the cavity between the waveguide sheet and the protective sheet, so that the air pressure in the cavity between the waveguide sheet and the protective sheet is greater than or equal to the air pressure of the environment in which the optical waveguide lens is located.

2. The optical waveguide lens as described in claim 1, characterized in that, The valve assembly includes a flexible diaphragm and a through hole. The through hole is formed on the waveguide sheet, the protective sheet, or the annular adhesive layer. The fixed end of the flexible diaphragm is connected to the waveguide sheet, the protective sheet, or the annular adhesive layer, and the movable end of the flexible diaphragm covers the through hole.

3. The optical waveguide lens as described in claim 2, characterized in that, The valve assembly includes a seal for sealing the through hole.

4. The optical waveguide lens as described in claim 1, characterized in that, The air valve assembly is a one-way air inlet valve, with the air inlet end of the one-way air inlet valve facing the outside of the optical waveguide lens and the air outlet end of the one-way air inlet valve facing the inside of the cavity.

5. The optical waveguide lens according to any one of claims 1-4, characterized in that, The air valve assembly is disposed on the waveguide sheet, and the distance between the location of the air valve assembly and the location of the diffraction microstructure is greater than or equal to a preset threshold.

6. A method for fabricating an optical waveguide lens, characterized in that, The method for preparing the optical waveguide lens according to claim 1 includes: The valve assembly is mounted on the waveguide plate or the protective plate; The waveguide sheet and the protective sheet are bonded together using the annular adhesive layer to obtain the lens to be processed; The lens to be processed is subjected to gas filling treatment to obtain an optical waveguide lens.

7. The method for fabricating an optical waveguide lens as described in claim 6, characterized in that, The process of performing gas filling treatment on the lens to be processed to obtain an optical waveguide lens includes: The lens to be processed is subjected to pressure treatment or temperature control treatment to obtain an optical waveguide lens.

8. The method for fabricating an optical waveguide lens as described in claim 7, characterized in that, The temperature control treatment of the lens to be processed includes: The temperature of the lens to be processed is reduced to a target temperature, which is lower than room temperature; After a preset time, the lens to be processed is placed in a room temperature environment to allow the temperature of the lens to return to room temperature.

9. The method for fabricating an optical waveguide lens as described in claim 6, characterized in that, The process of performing gas filling treatment on the lens to be processed to obtain an optical waveguide lens includes: After the gas filling process is completed on the lens to be processed, the gas valve assembly on the lens to be processed is sealed to obtain the optical waveguide lens.

10. A display device, characterized in that, The display device includes an optical engine and an optical waveguide lens as described in any one of claims 1-5, wherein the optical waveguide lens is used to directionally transmit the optical signal emitted from the optical engine to a target area.

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