Display module and near-eye display device

Abstract

A display module and a near-eye display device. The display module comprises: a display assembly (21); a lens (22) located on a display side of the display assembly (21) and used for imaging a display image of the display assembly (21); and a light source assembly (23) located in an edge region of the lens (22) and used for emitting infrared light, the infrared light being used for eye tracking imaging.

Description

Display modules and near-eye display devices

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510229403.1, filed on February 27, 2025, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] This disclosure relates to a display module and a near-eye display device using the same. Background Technology

[0004] Current virtual reality display technology requires magnifying the image displayed on a small screen through a lens before it enters the user's eye, allowing the user to observe a large image and achieve a highly immersive effect. The lens and screen are typically connected by a lens barrel and a support frame; the lens is fixed to the lens barrel, and the screen is fixed to the support frame. To prevent scratches on the lens edges and to increase the protection of the optical module, a lens cap is usually installed on the top of the lens barrel and the lens.

[0005] To provide a better user experience, eye-tracking technology can be added inside the optical module. Currently, mainstream eye-tracking solutions typically place the infrared light source and infrared camera inside the optical module. However, placing the infrared light source on the lens cap of the optical module increases its size and makes it difficult to meet the high precision requirements of eye tracking. Summary of the Invention

[0006] This disclosure provides a display module and a near-eye display device, which helps to reduce the size of the optical module, thereby reducing the size and weight of the entire device.

[0007] This disclosure provides a display module, including:

[0008] Display components;

[0009] A lens, located on the display side of the display component, is used to image the display screen of the display component;

[0010] A light source assembly, located in the edge region of the lens, is used to emit infrared light, which is used for eye-tracking imaging.

[0011] In one possible implementation, the light source assembly is located in the edge region of the first surface of the lens near the eye.

[0012] In one possible implementation, the wires of the light source assembly extend from the first surface of the lens to the side of the lens and connect to the motherboard.

[0013] In one possible implementation, the light source assembly is located in the edge region of the second surface of the lens near the display assembly side, and the infrared light shines through the lens onto the eye.

[0014] In one possible implementation, the wires of the light source assembly are connected to a contact area on the second surface of the lens, and the contact area is connected to the motherboard.

[0015] In one possible implementation, the light source assembly is located on the side of the lens.

[0016] In one possible implementation, the bottom surface of the light source assembly is parallel to the side surface of the lens.

[0017] In one possible implementation, the wires of the light source assembly are connected to a contact area on the side of the lens, and the contact area is connected to the motherboard.

[0018] In one possible implementation, the electrode side of the light source assembly is located outward inside the opening of the lens.

[0019] In one possible implementation, the gap between the opening and the light source assembly is filled with an adhesive that matches the refractive index of the lens.

[0020] In one possible implementation, the light source assembly is built into the injection mold core of the lens, and the light source assembly is embedded into the lens during the lens injection molding process.

[0021] In one possible implementation, the outer side of the conductor includes a hardening layer for covering the conductor.

[0022] In one possible implementation, the conductor is located on a substrate layer on the lens surface, the substrate layer being used to bond the lens to the conductor and the hardening layer.

[0023] In one possible implementation, the width of the wire is in the range of 5 nm to 0.1 mm, and the thickness of the wire is in the range of 1 nm to 0.1 mm.

[0024] In one possible implementation, the encapsulating resin of the lamp beads in the light source assembly is made of a transparent material, and the refractive index of the encapsulating resin and the refractive index of the lens material are less than or equal to a preset value.

[0025] This disclosure also provides a near-eye display device, including a display module as in any of the implementations. Attached Figure Description

[0026] Figure 1 is a schematic diagram of an optional optical module provided in an embodiment of this disclosure;

[0027] Figure 2 is another optional schematic diagram of the optical module provided in the embodiments of this disclosure;

[0028] Figure 3 is another optional schematic diagram of the optical module provided in the embodiments of this disclosure;

[0029] Figure 4 is an optional schematic diagram of the wiring of the optical module provided in an embodiment of this disclosure;

[0030] Figure 5 is another optional schematic diagram of the optical module provided in the embodiments of this disclosure;

[0031] Figure 6 is a schematic diagram of another optional optical module provided in an embodiment of this disclosure; and

[0032] Figure 7 is another optional schematic diagram of the optical module provided in the embodiments of this disclosure. Detailed Implementation

[0033] In the description of this disclosure, unless otherwise stated, "at least one" means one or more, and "more than" means two or more. Additionally, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0034] Virtual Reality (VR) is a simulation system that uses computer technology to generate a three-dimensional environment. By integrating technologies from multiple fields such as computer graphics, sensing technology, human-computer interaction, and artificial intelligence, it allows users to immerse themselves in a digital space that feels like the real world.

[0035] In some embodiments of this disclosure, the near-eye display device can also be a VR display device to provide virtual reality content to users, giving them a completely new visual experience. In these embodiments, the near-eye display device can be in the form of glasses, such as VR glasses, or in the form of a helmet or goggles, without limitation.

[0036] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The following embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0037] Figure 1 shows a schematic diagram of an optical module. As shown in Figure 1, the optical module may include a display component 11 and a lens 12. The display image formed by the display component 11 is imaged through the lens 12 and then projected onto (i.e., enters) the eye, allowing the user to observe the image and achieving a highly immersive effect. In some embodiments, the display image formed by the display component 11 is magnified by the lens 12 and then projected onto (i.e., enters) the eye, allowing the user to observe a large-sized image.

[0038] Optionally, the optical module may further include a bracket 13, a lens barrel 14, and a lens cap 15. The display component 11 can be connected to the bracket 13, and the lens barrel 14 can be connected to the bracket 13. For example, the display component 11 can be fixed to the bracket 13. The lens 12 can be fixed to the lens barrel 14, and the lens 12 and the display component 11 are connected by the lens barrel 14 and the bracket 13. The lens cap 15 is installed on the upper part of the lens barrel 14 and the lens 12 to prevent scratches on the edge of the lens 12 and to increase the protective performance of the optical module.

[0039] In related solutions, to provide a better user experience, eye-tracking technology can be added inside the optical module. Currently, mainstream eye-tracking solutions typically place the infrared light source and infrared camera for eye tracking inside the optical module. Referring again to Figure 1, the infrared light source 16 can be placed inside the lens cover 15 of the optical module.

[0040] Since the infrared light emitted by the infrared light source 16 needs to be reflected by the eye and received by the infrared camera, the position of the infrared light source 16 requires high precision to achieve clear imaging. For example, if the position of the infrared light source 16 deviates significantly, it may result in ineffective illumination of the eye. To ensure precise fixation of the eye-tracking infrared light source 16 to the lens cap 15, a positioning structure needs to be designed at a corresponding position inside the lens cap 15 for each infrared light source 16. Because the positioning structure exists between the lens cap 15 and the sidewall of the lens 12, it increases the volume of the entire optical module, thus increasing the overall size of the device. Furthermore, the lens cap 15 and the lens barrel 14 are assembled using a snap-fit ​​mechanism, but the assembly precision of this snap-fit ​​process is difficult to meet the high precision requirements of eye tracking.

[0041] Figure 2 is a schematic diagram of a display module provided in an embodiment of this disclosure. As shown in Figure 2, the display module includes:

[0042] Display component 21;

[0043] Lens 22, located on the display side of the display component 21, is used to image the display screen of the display component 21;

[0044] The light source assembly 23, located in the edge region of the lens 22, is used to emit infrared light, which is used for eye-tracking imaging.

[0045] Therefore, in this embodiment, the light emitted by the light source component illuminates the eye, enabling eye tracking. Furthermore, by placing the light source component at the edge of the lens, it remains unobservable during normal use of the display module. Compared to placing the light source component on the lens cap, the lens's position within the optical module can be precisely fixed because the light source component is located at the edge of the lens rather than on the lens cap. This embodiment achieves precise fixation and positioning of the light source component on the lens, eliminating the need for a positioning structure for the light source component. This reduces the size of the optical module, thereby reducing the overall size and weight of the device.

[0046] For example, the edge region of lens 22 can refer to the area within a certain range inward from the edge of the lens surface, such as the area within the dashed box shown in Figure 2. As an example, the edge region can be within 2 mm inward from the edge of the lens surface. As an example, the edge region can be the area outside a specific field of view (e.g., 0.9 field of view) of the lens's imaging area.

[0047] For example, the light source component 23 is located in the edge region of the lens 22. It can be implemented by fixing the light source component in the edge region of the lens 22, for example, it can be fixed on the surface of the lens 22, such as above or below the surface, or embedded in the lens 23. This embodiment of the present disclosure does not limit this.

[0048] For example, Figure 2 shows a schematic diagram of three positions of the light source assembly 23 located in the edge region of the lens 22, namely the surface of the lens near the eye (or the front surface), the lens side surface, and the surface of the lens near the display assembly 21.

[0049] It should be understood that Figure 2 only shows a schematic diagram of three positions of the light source assembly 23 on the lens 22, but this does not constitute a limitation on the embodiments of this disclosure. The light source assembly 23 can be located at any position in the edge region of the lens.

[0050] Optionally, the optical module may also include an infrared camera. The infrared light emitted by the optical component 23 is reflected by the eye and received by the infrared camera to achieve imaging. The eye position can then be calculated based on the imaging to achieve eye tracking.

[0051] Optionally, the light source component 23 may include an infrared light source for emitting infrared light. As an example, the light source component 23 may include, but is not limited to, a light-emitting diode (LED).

[0052] Optionally, the number of light source components 23 can be one or more, without limitation.

[0053] Optionally, the size of the light source component 23 is smaller than a preset value. For example, when the light source component 23 is an LED, its size may be less than or equal to 1 mm.

[0054] Therefore, since the light source component 23 is small in size and located in the edge region of the lens 22, it can be located in a very large field of view. The user cannot observe the light source component 23 during normal use. Therefore, the light source component 23 in this embodiment of the present disclosure will not affect the user's experience.

[0055] In some embodiments, the infrared light emitted by the light source assembly 23 is reflected by the eye and received by the infrared camera. Since the light source assembly 23 is positioned precisely at the edge of the lens 22, it effectively illuminates the eye, meeting the high precision requirements of the light source assembly. Furthermore, the light source assembly 23 is not mounted on the lens cap, and the assembly precision of the fastening process between the lens cap and the lens barrel 14 does not affect the accuracy of eye tracking. Simultaneously, by positioning the light source assembly 23 precisely at the edge of the lens 22, a positioning structure is not required for the light source assembly 23, thus reducing the size of the optical module and consequently the overall size and weight of the device.

[0056] Optionally, in some embodiments, the light source assembly 23 is located in the edge region of the first surface of the lens 22 near the eye.

[0057] Specifically, when the light source assembly 23 is located in the edge region of the first surface of the lens 22 near the eye, the light source assembly 23 can directly emit light to illuminate the eye. For example, the light source assembly 23 can be distributed within a 2mm range inward from the edge of the first surface of the lens 22 near the eye. Optionally, the size of the light source assembly 23 is less than 1mm. Because the light source assembly 23 is small and located within a very large field of view, the user will not observe the light source assembly during normal use.

[0058] Optionally, in some embodiments, the wires of the light source assembly extend from the first surface of the lens to the side of the lens and connect to the motherboard.

[0059] Specifically, when the light source assembly 23 is located in the edge region of the first surface of the lens 22 near the eye, in order to illuminate the light source assembly 23, it is necessary to connect the wires of the light source assembly 23 to the motherboard. In this embodiment, the wires may also be referred to as drive traces.

[0060] For example, referring to Figure 3, a schematic diagram of the wiring for two light source components is shown. As shown in Figure 3, the wire 31 of the light source component 23 extends from the first surface of the lens 22 near the eye to the side surface of the lens 22, and finally connects to the motherboard. In one implementation, as the wire 31 extends to the side surface of the lens 22 in Figure 3, it can connect to a contact area (pad) 32, which is further connected to the motherboard via a trace. It should be understood that the wiring of the other light source component in Figure 3 is similar to that of the light source component 23, and reference can be made to the relevant description.

[0061] In one possible implementation, the wires of the light source assembly 23 extend from the first surface of the lens 22 near the eye to the side of the lens 22, and are finally connected to the motherboard via a flexible printed circuit (FPC).

[0062] Optionally, in some embodiments, the width of the wire is in the range of 5nm-0.1mm, and the thickness of the wire is in the range of 1nm-0.1mm.

[0063] Specifically, since the wires are distributed on the outer side of the lens 22 surface, they are not easily observed by the user when the width of the traces is sufficiently thin. For example, the width of the wires can be in the range of 5nm-0.1mm, and the thickness of the traces can be in the range of 1nm-0.1mm. Here, "outer side" can refer to the side away from the lens surface.

[0064] Optionally, the conductor can be made of metallic conductive materials such as silver, copper, or gold, like silver paste, copper paste, or gold paste, or transparent conductive materials such as nanomaterials (e.g., silver nanowires), graphene, or indium tin oxide (ITO). By using a transparent conductive material, the influence of the conductor on imaging can be reduced.

[0065] Optionally, the resistance of the drive wire is 10. -5 Up to 10 -1 Within the range of ohms.

[0066] Optionally, when the conductor is made of metallic materials such as silver paste, copper paste, or gold paste, the conductor of the light source component can be fabricated by printing. When the conductor is made of silver nanowires, graphene, or ITO, the light source component can be fabricated by photolithography.

[0067] In some embodiments, the outer side of the conductor includes a hardening layer for covering the conductor.

[0068] Specifically, by covering the conductor with a hardening layer on its outer side to prevent exposed wiring, electrical defects in the conductor can be prevented. Optionally, the hardening layer can also serve as a protective layer. The outer side of the conductor can refer to the side furthest from the lens surface.

[0069] For example, a hardening layer can be provided on the outer side of the wire on the side of lens 22 to prevent electrical defects caused by scratches during reliability testing or use. Referring again to Figure 3, a hardening layer 33 can be further provided on the wire 31 to protect the wire 31.

[0070] For example, the hardened layer can be processed by coating or inkjet printing on the outside of the drive wire. Optionally, the thickness of the hardened layer is 2-10 μm.

[0071] Optionally, the hardening layer can be a black coating. When the hardening layer is a black coating, it can absorb ambient light, thus preventing ambient light from entering the human eye after multiple reflections and improving display contrast.

[0072] Optionally, in some embodiments, the conductor is located on a base layer on the lens surface, the base layer being used to bond the lens to the conductor and the hardening layer.

[0073] Specifically, lens materials generally have low surface energy, resulting in low adhesion between the conductor and the hardening layer. To improve the adhesion between the lens and the conductor and hardening layer, a base layer can be processed on the lens surface.

[0074] For example, a base layer can be first set on the side of lens 22, and then a wire and a hardening layer can be further set on the base layer to improve the adhesion between the side of the lens and the wire and the hardening layer.

[0075] Optionally, the underlayer can be applied using processes such as coating or inkjet printing. Optionally, the thickness of the underlayer can be 0.1-50 μm.

[0076] Optionally, the undercoat can be a black coating. When the undercoat is a black coating, it can further absorb stray light.

[0077] Optionally, the positive and negative electrodes of the light source assembly 23 are connected in the contact (pad) areas corresponding to the positive and negative wires by welding or bonding.

[0078] Optionally, when the light source component 23 is driven by positive and negative electrodes, two separate wires are needed to connect the positive and negative electrodes of the light source component 23 to multiple light source components. As shown in Figure 4, the two separate wires are connected to the pad areas of the positive and negative electrodes of the three light source components respectively, so as to realize that the separate positive and negative wires drive and illuminate multiple light source components.

[0079] Alternatively, the connecting material used in the pad area can be anisotropic conductive adhesive or conductive materials such as solder.

[0080] Optionally, the pad area of ​​the electrode corresponding wire of the light source assembly 23 is smaller than a certain range, for example, the length and width of the pad area are in the range of 0.05-0.2mm, thereby reducing the influence of the pad area on imaging.

[0081] Optionally, reinforcement can be applied to the sides of the electrodes of the light source assembly 23, for example, by applying transparent resins such as acrylate or polyurethane to the sides of the electrodes, thereby enhancing the adhesion between the electrodes of the light source assembly 23 and the pad area and preventing the light source assembly 23 from falling off during reliability testing or use.

[0082] Optionally, in some embodiments, the light source assembly is located in the edge region of the second surface of the lens near the display assembly side, and the infrared light shines through the lens onto the eye.

[0083] Specifically, when the light source assembly 23 is located in the edge region of the second surface of the lens 22 near the display assembly 21, the infrared light emitted by the light source assembly 23 passes through the lens 22 and illuminates the eye. For example, the light source assembly 23 may be distributed within a 2mm range inward from the edge of the second surface of the lens 22 near the display assembly 21. Optionally, the size of the light source assembly 23 is less than 1mm. Because the light source assembly 23 is small and located within a very large field of view, the user will not observe the light source assembly during normal use.

[0084] Optionally, in some embodiments, the wires of the light source assembly are connected to a contact area on the second surface of the lens, the contact area being connected to the motherboard.

[0085] Specifically, when the light source assembly 23 is located in the edge region of the second surface of the lens 22 near the display assembly 21, in order to illuminate the light source assembly 23, it is also necessary to connect the wires of the light source assembly 23 to the motherboard.

[0086] For example, referring to Figure 5, another schematic diagram of the wiring of the two light source components is shown. As shown in Figure 5, the wire 41 of the light source component 23 is connected to a contact area on the second surface of the lens 22 near the display component 21, and this contact area is connected to the motherboard. In one implementation, in Figure 5, the wire 41 can be connected to a pad 42 on the second surface of the lens 22 near the display component 21, and the pad 42 is further connected to the motherboard via a trace. Optionally, a hardening layer 43 can be further provided on the wire 41 to protect the wire 41. It should be understood that the wiring of the other light source component in Figure 5 is similar to that of the light source component 23, and reference can be made to the relevant description.

[0087] Optionally, a base layer can be provided on the lens surface, and a wire and a hardening layer can be further provided on the base layer. The base layer can be used to bond the lens to the wire and the hardening layer.

[0088] Specifically, when the light source assembly is located in the edge region of the second surface of the lens near the display assembly, the wires, hardening layer, underlayment, electrodes, and other settings of the light source assembly can refer to the relevant description of the light source assembly on the first surface of the eye side, or be adapted in a simple way.

[0089] Optionally, in some embodiments, the light source assembly is located on the side of the lens.

[0090] Specifically, when the light source assembly 23 is located to the side of the lens 22, the infrared light emitted by the light source assembly 23 can directly illuminate the eye. Optionally, the size of the light source assembly 23 is less than 1 mm. Because the light source assembly 23 is small in size and located in a very large field of view, the user will not observe the light source assembly during normal use.

[0091] Optionally, in some embodiments, the bottom surface of the light source assembly is parallel to the side surface of the lens.

[0092] Specifically, when the light source assembly 23 is directly connected to the side of the lens 22, the bottom surface of the light source assembly 23 is parallel to the side of the lens 22, which can achieve the highest assembly precision of the light source assembly. It should be understood that the bottom surface of the light source assembly 23 can refer to the surface of the light source assembly 23 used for assembly. It should also be understood that in this embodiment, "parallel" can mean approximately parallel or nearly parallel.

[0093] Optionally, in some embodiments, the wires of the light source assembly are connected to a contact area on the side of the lens, the contact area being connected to the motherboard.

[0094] Specifically, when the light source assembly 23 is located on the side of the lens 22, in order to illuminate the light source assembly 23, it is also necessary to connect the wires of the light source assembly 23 to the motherboard.

[0095] For example, referring to Figure 6, another schematic diagram of the wiring of the two light source components is shown. As shown in Figure 6, the wire 51 of the light source component 23 is connected to the motherboard on the side of the lens 22. In one implementation, in Figure 6, the wire 51 can be connected to a pad 52 on the side of the lens 22, and the pad 52 is further connected to the motherboard via a trace. Optionally, a hardening layer 53 can be further provided on the wire 51 to protect the wire 51. It should be understood that the wiring of the other light source component in Figure 6 is similar to that of the light source component 23, and can be referred to the relevant description.

[0096] Optionally, a base layer can be provided on the lens surface, and a wire and a hardening layer can be further provided on the base layer. The base layer can be used to bond the lens to the wire and the hardening layer.

[0097] Specifically, when the light source assembly is on the side of the lens, the wires, hardening layer, underlayment, electrodes and other settings of the light source assembly can all refer to the relevant description of the first surface of the light source assembly on the eye side, or make some simple adaptations.

[0098] In some embodiments, the electrode side of the light source assembly is located outward inside the opening of the lens.

[0099] For example, an opening can be made inside the lens 22 using ultra-precision machining, injection molding, or other methods, and then the light source assembly 23 can be placed inside the opening with its electrode side facing outward. Afterward, electrodes can be fabricated at both ends of the light source assembly 23 using bonding or welding processes, and wires can be fabricated using printing or photolithography processes, with positive and negative traces connected to the corresponding pad areas.

[0100] For example, referring to Figure 7, taking the light source assembly 23 located in the edge region on the side of the lens 22 as an example, the light source assembly 23 can be located inside the opening on the side of the lens 22, and the electrode side of the light source assembly 23 faces outward to facilitate the connection of the wires to the electrodes. Specifically, the wire 61 of the light source assembly 23 is connected to the motherboard on the side of the lens 22. In one implementation, as shown in Figure 7, the wire 61 can be connected to a pad 62 on the side of the lens 22, and the pad 62 is further connected to the motherboard via a trace. Optionally, a hardening layer 63 can be further provided on the wire 61 to protect the wire 61. It should be understood that the wires of another light source assembly in Figure 7 are similar to those of the light source assembly 23, and can be referred to the relevant description.

[0101] It is understandable that, in the display module shown in Figure 3 or Figure 4, the light source assembly can similarly be placed inside the opening of the lens, with the electrode side facing outwards to facilitate connection with the wires.

[0102] Therefore, by having the electrode side of the light source component located outward inside the opening of the lens, the present embodiment can help to further reduce the size of the optical module, thereby reducing the size of the entire device.

[0103] In some embodiments, the gap between the opening and the light source assembly is filled with an adhesive whose refractive index matches that of the lens. Filling the gap between the opening and the light source assembly with adhesive enables the fixation of the light source assembly, while using an adhesive whose refractive index matches that of the lens reduces the impact on imaging.

[0104] In some embodiments, the light source assembly is built into the injection mold core of the lens, and the light source assembly is embedded into the lens during the lens injection molding process.

[0105] Specifically, the light source assembly 23 can be placed inside the injection mold core of the lens 22, and the light source assembly 23 can be embedded into the interior of the lens 22 during the injection molding process. Afterwards, electrodes can be fabricated at both ends of the light source assembly 23 using bonding or welding processes, and wires can be fabricated using printing or photolithography processes, with positive and negative traces connected to the corresponding pad areas.

[0106] Therefore, by embedding the light source assembly into the lens through a built-in light source assembly in the lens injection mold core, the volume of the optical module can be further reduced, thereby reducing the overall size of the device.

[0107] Specifically, in this embodiment of the present disclosure, when the light source assembly is inside the lens, the wires, hardening layer, underlayment, and electrodes of the light source assembly can refer to the relevant description of the first surface of the light source assembly on the eye side, or some simple adaptations can be made.

[0108] In some embodiments, the encapsulating resin of the lamp beads in the light source assembly is a transparent material, and the difference between the refractive index of the encapsulating resin and the refractive index of the imaging lens material is less than or equal to a preset value. That is, the refractive index of the encapsulating resin is close to the refractive index of the lens material. For example, the difference between the refractive index of the encapsulating resin and the refractive index of the lens material does not exceed 0.2.

[0109] Therefore, in this embodiment of the present disclosure, by configuring the encapsulation resin of the lamp beads of the light source component to be a transparent material, and the refractive index of the encapsulation resin to be close to the refractive index of the lens material, it is beneficial to reduce the observability of the light source component.

[0110] The following describes the display components, lenses, and other parts in the display module of the present disclosure embodiments.

[0111] Optionally, lens 22 may include one or more of the following: conventional geometric lens, Nefertory lens, folding optical path lens, etc.

[0112] Optionally, for better display results, the folding optical path lens is typically a combination of multiple lenses. For example, the number of lenses can be 1-5.

[0113] Optionally, polarizing films, such as polarizers (POLs), thin-film polarizers (RPs), and quarter-wave plates (QWPs), can be stacked sequentially on the outer surface of the lens near the eye. Alternatively, the polarizing films can also be distributed between different lenses.

[0114] Optionally, to reduce reflections on the lens surface near the eye, a reflective layer can be attached to or deposited on the lens surface.

[0115] Optionally, to reduce the size of the display module, the ineffective area of ​​the lens can be compressed. This ineffective area has no substantial effect on lens imaging; that is, the ineffective area is not used for imaging. Alternatively, the bearing edge of the lens, i.e., the ineffective area, can be removed through processes such as ultra-precision machining or injection molding.

[0116] In some embodiments, continuing to refer to FIG2, the display component 21 may be connected to the bracket 24, and the lens barrel 25 may be connected to the bracket 24. For example, the display component 21 may be fixed to the bracket 24. The lens 22 may be fixed to the lens barrel 25, and the lens 22 and the display component 21 are connected by the lens barrel 25 and the bracket 24.

[0117] Optionally, the lens barrel 25 can be made of a high-strength resin material. Optionally, the lens barrel 25 can be made of black resin material. Optionally, the support 24 can be made of a high-strength resin material or metal material.

[0118] Optionally, the lens 22 can be fixed to the lens barrel 25 with glue or tape, and the display component 21 and the bracket 24 can also be fixed with glue or tape. The lens barrel 25 and the bracket 24 are fixed with glue and tape.

[0119] Optionally, the display component 21 may include a display screen, such as a small-sized display screen. For example, the display component 21 may include, but is not limited to, a liquid crystal display (LCD), a micro organic light-emitting diode (Micro-OLED), a micro light-emitting diode (Micro-LED), etc.

[0120] Optionally, referring to Figure 2, a lens cap 25 can be installed on the upper part of the lens barrel 24 and the lens 22 to prevent the edge of the lens 22 from being scratched and to increase the protective performance of the optical module. Optionally, the lens cap 25 is fixed to the lens 22 or the lens barrel 24 by means of mechanical snap-fit ​​or hinge.

[0121] Optionally, the lens cap 25 can be made of resin. Optionally, the lens cap 25 can be made of a material that strongly absorbs visible light to prevent external stray light from entering from the side of the lens, reflecting multiple times, and then shining into the eye, thus reducing the contrast of the displayed image.

[0122] Optionally, the lens cover 25 is made of infrared-transmitting material, thereby ensuring that infrared light can pass through the lens cover 25 and reach the eye.

[0123] This disclosure also provides a near-eye display device, including the display module described in any of the above embodiments. In some possible implementations, when the near-eye display device is in the form of eyeglasses, each frame in the eyeglasses corresponds to one display module.

[0124] The specific embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure. For example, the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately. Furthermore, various different embodiments of this disclosure can also be arbitrarily combined, as long as they do not violate the spirit of this disclosure, they should also be considered as the content disclosed by this disclosure.

[0125] In the description of the embodiments of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0126] The devices or elements referred to in this disclosure, or implied herein, must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this disclosure. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise precisely specified.

[0127] The terms "first," "second," "third," etc. (if applicable) in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0128] It is understood that the various numerical designations used in the embodiments of this disclosure are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this disclosure.

[0129] It should also be understood that specific features, structures, or characteristics relating to embodiments in the specification are included in at least one embodiment of this disclosure. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0130] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display module, comprising: Display components; A lens, located on the display side of the display component, is used to image the display screen of the display component; A light source assembly, located in the edge region of the lens, is used to emit infrared light, which is used for eye-tracking imaging.

2. The display module according to claim 1, wherein, The light source assembly is located in the edge region of the first surface of the lens near the eye.

3. The display module according to claim 2, wherein, The wires of the light source assembly extend from the first surface of the lens to the side of the lens and connect to the motherboard.

4. The display module according to claim 1, wherein, The light source assembly is located in the edge region of the second surface of the lens near the display assembly, and the infrared light shines through the lens onto the eye.

5. The display module according to claim 4, wherein, The wires of the light source assembly are connected to the contact area on the second surface of the lens, and the contact area is connected to the main board.

6. The display module according to claim 1, wherein, The light source assembly is located on the side of the lens.

7. The display module according to claim 6, wherein, The bottom surface of the light source assembly is parallel to the side surface of the lens.

8. The display module according to claim 6 or 7, wherein, The wires of the light source assembly are connected to the contact area on the side of the lens, and the contact area is connected to the main board.

9. The display module according to any one of claims 1-8, wherein, The electrode side of the light source assembly faces outward and is located inside the opening of the lens.

10. The display module according to claim 9, wherein, The gap between the opening and the light source assembly is filled with an adhesive that matches the refractive index of the lens.

11. The display module according to any one of claims 1-10, wherein, The light source assembly is built into the injection mold core of the lens, and the light source assembly is embedded into the lens during the lens injection molding process.

12. The display module according to any one of claims 1-11, wherein, The outer side of the conductor of the light source assembly includes a hardened layer for covering the conductor.

13. The display module according to claim 12, wherein, The conductor is located on the underlayment of the lens surface, and the underlayment is used to bond the lens to the conductor and the hardening layer.

14. The display module according to any one of claims 1-13, wherein, The width of the wire is in the range of 5nm-0.1mm, and the thickness of the wire is in the range of 1nm-0.1mm.

15. The display module according to any one of claims 1-14, wherein, The encapsulating resin of the lamp beads in the light source assembly is made of transparent material, and the refractive index of the encapsulating resin and the refractive index of the lens material are less than or equal to a preset value.

16. A near-eye display device, comprising a display module as described in any one of claims 1-15.

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