Light-emitting components, display modules and near-eye display devices

Abstract

The present application relates to a light-emitting component, a display module, and a near-eye display device. The light-emitting component includes a substrate, a light-emitting unit, and a lens unit. The light-emitting unit is provided on the substrate. The lens unit is provided on the light-emitting side of the light-emitting unit, and the optical axis of the lens unit deviates from the central axis of the light-emitting unit in a direction perpendicular to the central axis of the light-emitting unit. When the above-mentioned light-emitting component is applied to the display module of the near-eye display device, it can achieve the effect of reducing ghost images, which is beneficial to improving the imaging quality of the near-eye display device and enhancing the user experience.

Description

Technical Field

[0001] The present application relates to the field of near-eye display technology, and in particular to a light-emitting component, a display module, and a near-eye display device. Background Art

[0002] Near-eye display devices include augmented reality (AR) devices and mixed reality (MR) devices. These devices can integrate the virtual images created by the display module with the real scene, providing users with an immersive visual experience. As a result, near-eye display devices are increasingly sought after by the industry, and the industry's performance requirements for near-eye display devices are also increasing. However, current near-eye display devices are prone to ghosting, which seriously affects the user experience. Summary of the Invention

[0003] The embodiments of the present application provide a light-emitting component, a display module, and a near-eye display device to solve the problem that current near-eye display devices are prone to generating ghost images.

[0004] A light-emitting component, comprising:

[0005] substrate;

[0006] a light emitting unit, disposed on the substrate; and

[0007] The lens unit is provided on the light-emitting side of the light-emitting unit, and the optical axis of the lens unit deviates from the central axis of the light-emitting unit in a direction perpendicular to the central axis of the light-emitting unit.

[0008] A display module having a central field of view and an edge field of view, the display module comprising:

[0009] a substrate; and

[0010] A plurality of light-emitting components are arranged in an array on the substrate, wherein the main light emitted by the light-emitting components located in the edge field of view is inclined to the central axis of the light-emitting surface of the light-emitting components.

[0011] A near-eye display device comprises a projection lens assembly, a light guide module and a display module as described in any one of the above embodiments, wherein the projection lens assembly is arranged between the light guide module and the display module.

[0012] The aforementioned light-emitting assembly deviates the optical axis of the lens unit from the central axis of the light-emitting unit in a direction perpendicular to the central axis of the light-emitting unit, thereby causing the main light emitted by the light-emitting assembly to be inclined relative to the central axis of the light-emitting unit. Thus, when the light-emitting assembly is used in a display module of a near-eye display device, the light emitted by the light-emitting assembly is projected by the projection lens assembly of the near-eye display device to the light guide module, reflected by the light guide module back to the display module, and then reflected by the display module to the projection lens assembly. At least a portion of the reflected light will deviate from the light collection cone angle of the projection lens assembly and will not enter the light guide module to produce ghost images, thereby achieving the effect of reducing ghost images, which is beneficial to improving the imaging quality of the near-eye display device and further enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 A schematic diagram of a near-eye display device worn on a user's head in some embodiments;

[0015] Figure 2 is a schematic structural diagram of a near-eye display device in some embodiments;

[0016] Figure 3 Schematic diagram of the outgoing light path of a light emitting component located in the edge field of view in some embodiments;

[0017] Figure 4 is a schematic diagram of an outgoing light path of a light emitting component located in the central field of view in some embodiments;

[0018] Figure 5 Schematic diagram of the relationship between the main light emitted by the light-emitting component and the field of view angle in some embodiments;

[0019] Figure 6 A schematic diagram of an outgoing light path of a light emitting component located in a quasi-center field of view in some embodiments;

[0020] Figure 7 Schematic diagram of the relationship between the main light emitted by the light-emitting component and the field of view angle in some other embodiments;

[0021] Figure 8 Schematic diagrams of light-emitting paths of light-emitting components located in different fields of view in other embodiments;

[0022] Figure 9 is a schematic structural diagram of a light-emitting component located in an edge field of view in some embodiments;

[0023] Figure 10 Schematic diagram of the relationship between the offset of the lens unit relative to the light-emitting unit and the field of view angle in some embodiments;

[0024] Figure 11 is a schematic structural diagram of a light-emitting component located in the central field of view in some embodiments;

[0025] Figure 12 Schematic diagram of the relationship between the offset of the lens unit relative to the light-emitting unit and the field of view angle in some other embodiments;

[0026] Figure 13 Schematic diagram of the structure of the display module and the projection lens assembly in some embodiments.

[0027] Reference numerals:

[0028] 10. Near-eye display device; 11. Display module; 111. Substrate; 112. Light-emitting component; 1121. Light-emitting unit; 1122. Light-emitting surface; 1123. Lens unit; 1124. Base; 113. Reflective element; 114. Light-combining prism; 115. Red light module; 116. Green light module; 117. Blue light module; 12. Projection lens assembly; 13. Light guide module; 131. Optical waveguide; 132. Input coupling grating; 133. Output coupling grating; 20. User. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0030] The optical system of near-eye display devices, such as AR devices and MR devices, is typically equipped with a display module for emitting light, a projection lens assembly for projecting light, and a light guide module for transmitting light. The projection lens assembly is used to project the light emitted by the display module into the light guide module, which is used to merge the light emitted by the display module with the light of the real scene and transmit it to the user's eyeball, providing the user with an immersive visual experience. The display module is equipped with multiple light-emitting components arranged in an array, each of which is capable of emitting light. The projection lens assembly is capable of receiving and projecting at least a portion of the light emitted by the light-emitting components toward the light guide module. The angle at which the projection lens assembly can receive light emitted by the light-emitting components is the light collection cone angle of the projection lens assembly. Light within the light collection cone angle of the light emitted by the light-emitting components can be projected by the projection lens assembly into the light guide module. In the near-eye display device in the related art, part of the light emitted by the display module and projected to the light guide module through the projection lens group is reflected by the light guide module to form reflected light. Part of the reflected light will return to the display module through the projection lens group, and then return to the light guide module through the projection lens group again after being reflected by the display module.

[0031] A projection lens assembly typically consists of one or more lenses. Due to the conjugate nature of lens imaging, the position of the reflected light returning to the display module from the projection lens assembly is often different from the position of the light-emitting component that emitted the light. Furthermore, after being reflected again by the display module, the reflected light typically also falls within the projection lens assembly's light collection cone. This results in the reflected light forming an image different from that displayed by the display module after returning to the light guide module through the projection lens assembly. For example, the reflection position of some reflected light in the display module is centrally symmetrical with the position of the light emitted by the display module. This can easily cause this reflected light to form a ghost image when it is transmitted through the projection lens assembly and light guide module to the user's eyeball, which is upside-down, left-right, and right-side-down from the image displayed on the display module, affecting the user's viewing experience.

[0032] To solve the above problems, the present application provides a light-emitting component, a display module and a near-eye display device.

[0033] See Figure 1 and Figure 2 , Figure 1 is a schematic diagram of a near-eye display device 10 worn on the head of a user 20 in some embodiments, Figure 2Schematic diagram of the structure of the near-eye display device 10 in some embodiments. The near-eye display device 10 provided in the present application includes but is not limited to AR head-mounted devices such as AR glasses and AR helmets or MR head-mounted devices such as MR glasses and MR helmets. The near-eye display device 10 may include a display module 11, a projection lens group 12 and a light guide module 13. The display module 11 is used to emit light. The display module 11 may include various display screens that can emit light to display images, such as LED miniaturization and matrix technology display screens (Micro LED display screens), self-luminous single-panel color Micro-LED micro display screens, etc. The projection lens group 12 may be a collimating lens group. The projection lens group 12 may include one or more lenses with optical focal length. The projection lens group 12 is used to adjust the light emitted by the display module 11 and project it into the light guide module 13. For example, the projection lens assembly 12 can collimate the light emitted by the display module 11 into parallel light and project it into the light guide module 13. The display module 11 and the projection lens assembly 12 can then form a Lambertian light source, which is beneficial for improving the imaging quality of the near-eye display device 10. The light guide module 13 is used to merge the light emitted by the display module 11 with the light of the real scene and transmit it to the eyes of the user 20 for viewing.

[0034] The light guide module 13 may include an optical waveguide 131, an input coupling grating 132, and an output coupling grating 133. Both the input coupling grating 132 and the output coupling grating 133 are disposed on the optical waveguide 131. The input coupling grating 132 corresponds to the position where light emitted by the display module 11 enters the optical waveguide 131, and the output coupling grating 133 corresponds to the position where light within the optical waveguide 131 exits and reaches the eyeballs of the user 20. The input coupling grating 132 can diffract, refract, and other processes to input light from the real scene and light emitted by the display module 11 into the optical waveguide 131. The optical waveguide 131 then transmits the light input from the input coupling grating 132 to the output coupling grating 133 through processes such as total internal reflection and diffraction. The light is then projected toward the eyeballs of the user 20 through diffraction and refraction by the output coupling grating 133.

[0035] exist Figure 2 In the illustrated embodiment, the light guide module 13 includes only one group of optical waveguides 131, input coupling gratings 132, and output coupling gratings 133. In practice, the light guide module 13 may also include two, three, or more groups of optical waveguides 131, input coupling gratings 132, and output coupling gratings 133 to couple light of different wavelength bands into different optical waveguides 131 for transmission, thereby improving the imaging quality of the near-eye display device 10.

[0036] Of course, the near-eye display device 10 may also include functional modules such as an audio module, a wireless communication module, and a data processing module (not shown). Each functional module works together with the display module 11, the projection lens assembly 12, and the light guide module 13 to achieve complete AR or MR imaging. The specific configuration of the modules in the near-eye display device 10 can be selected according to actual needs and will not be further described here.

[0037] Further, refer to Figure 2 and Figure 3 As shown, in some embodiments, the display module 11 includes a substrate 111 and a plurality of light-emitting components 112 arranged in an array on the substrate 111. The number of light-emitting components 112 can correspond to the number of pixels of the display module 11, and the arrangement pattern of the light-emitting components 112 can be set according to the pixel display requirements of the display module 11. It can be understood that the display module 11 includes a central field of view and an edge field of view, and the maximum field of view angle of the display module 11 corresponds to the range of the edge field of view. In the direction from the central field of view to the edge field of view, the field of view angle gradually increases. In some embodiments, the main light ray b emitted by the light-emitting component 112 located in the edge field of view is inclined to the central axis c of the light-emitting surface 1122 of the light-emitting component 112.

[0038] It should be noted that, in the present application, an aperture (not shown) is provided in the optical path of the near-eye display device 10. The principal light emitted by a light-emitting component 112 can be understood as the light emitted by the light-emitting component 112 and passing through the center of the aperture. The light-emitting component 112 may include a light-emitting unit 1121, which may be a Micro LED chip. When the light emitted by the light-emitting component 112 originates from the light-emitting unit 1121 in the light-emitting component 112, the light-emitting surface 1122 of the light-emitting unit 1121 is the light-emitting surface 1122 of the light-emitting component 112. The central axis of the light-emitting surface 1122 of the light-emitting component 112 can be understood as the central axis of the light-emitting unit 1121 in the light-emitting component 112. The central axis of a light-emitting unit 1121 is defined in the present application as a straight line passing through the geometric center of the surface of the light-emitting unit 1121 facing the projection lens assembly 12 and perpendicular to the surface of the light-emitting unit 1121 facing the projection lens assembly 12.

[0039] It can be understood that since the imaging of the projection lens group 12 has a conjugate characteristic, in a traditional near-eye display device, when the main light emitted by a certain light-emitting component coincides with the central axis of the light-emitting surface 1122 of the light-emitting component, the light emitted by the light-emitting component within the light-collecting cone angle of the projection lens group is reflected by the light guide module and returns to the display module, and then reflected toward the projection lens group through the display module to form reflected light. The reflected light is usually still within the light-collecting cone angle of the projection lens group, and is easily projected by the projection lens group into the light guide module to form a ghost image.

[0040] And reference Figure 3As shown, in the near-eye display device 10 of the present application, the principal ray b emitted by the light-emitting assembly 112 located in the peripheral field of view is inclined relative to the central axis c of the light-emitting surface 1120 of the light-emitting assembly 112. Light ray e emitted by the light-emitting assembly 112 and located within the light collection cone angle d of the projection lens assembly 12 can be received by the projection lens assembly 12 and projected into the light guide module 13. A portion of the light ray e is reflected by the input coupling grating 132, optical waveguide 131, or other components of the light guide module 13, forming light ray f that returns to the display module 11 via the projection lens assembly 12. The inclination of the principal ray b relative to the central axis c affects the angle at which light ray f enters the display module 11, thereby changing the reflection angle of light ray f on the display module 11. This causes light ray g, formed by light ray f reflected from the display module 11, to at least partially deviate from the range of the light collection cone angle d of the projection lens assembly 12. Consequently, at least a portion of light ray g cannot be received by the projection lens assembly 12 and projected into the light guide module 13, forming a ghost image. Therefore, the above-mentioned display module 11 of the present application can reduce the light reflected by the light guide module 13 and returning to the display module 11, and at least part of the light returning to the light guide module 13 again to form ghost images, thereby achieving the effect of eliminating ghost images, which is beneficial to improving the imaging quality of the near-eye display device 10, and further improving the user experience of the user 20.

[0041] It is understood that as long as an angle exists between the principal ray emitted by the light-emitting assembly 112 and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112, the light emitted by the light-emitting assembly 112 can be reflected back to the display module 11 via the light-guiding module 13. When reflected by the display module 11, at least a portion of the reflected light deviates from the light-collecting cone angle of the projection lens assembly 12 and cannot enter the light-guiding module 13. This effectively reduces the ghost images formed by at least a portion of the reflected light returning to the light-guiding module 13, thereby reducing at least a portion of the ghost images and improving the imaging quality of the near-eye display device 10. Therefore, the angle between the principal ray emitted by the light-emitting assembly 112 and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 is not limited and can be set specifically according to the requirements for eliminating ghost images.

[0042] Of course, the greater the angle between the main light ray emitted by the light-emitting assembly 112 located in the peripheral field of view and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112, the more effective the ghost image elimination effect. In some embodiments, the angle between the main light ray emitted by the light-emitting assembly 112 located in the peripheral field of view and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 is greater than or equal to 5°, which can eliminate at least a portion of the ghost images formed by the reflected light returning to the light guide module 13, thereby reducing some of the ghost images.

[0043] Furthermore, refer to Figure 3As shown, in some embodiments, the angle between the chief ray emitted by the light-emitting assembly 112 located in the edge field of view and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 is greater than half the light-collecting cone angle of the projection lens assembly 12 corresponding to the light-emitting assembly 112, thereby minimizing ghost images. In some embodiments, the light-collecting cone angle of the projection lens assembly 12 corresponding to the light-emitting assembly 112 in the edge field of view is 20°. For example, the light-collecting cone angle d of the projection lens assembly 12 corresponding to the light-emitting assembly 112 is 20°. Then, the angle between the chief ray b emitted by the light-emitting assembly 112 and the central axis c of the light-emitting surface 1122 of the light-emitting assembly 112 is greater than or equal to half the light-collecting cone angle d, that is, greater than or equal to 10°. As a result, when the light e emitted by the light-emitting component 112 returns to the display module 11 through the light guide module 13 and is reflected again to form the light g, the reflection direction of the light g completely deviates from the light collection cone angle d of the projection lens group 12 corresponding to the reflection position, thereby preventing the light g from being received by the projection lens group 12 and projected onto the light guide module 13 to the greatest extent, thereby avoiding the light g returning to the light guide module 13 to form a ghost image to the greatest extent.

[0044] Of course, the angle between the principal ray emitted by the light-emitting assembly 112 located in the edge field of view and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 cannot be too large, so as to prevent the light emitted by the light-emitting assembly 112 from entering the projection lens assembly 12 at too large an angle and being reflected by the projection lens assembly 12, thereby preventing the projection lens assembly 12 from projecting onto the light guide module 13 and reducing the light extraction efficiency of the display module 11. In some embodiments, when the light collection cone angle of the projection lens assembly 12 corresponding to the light-emitting assembly 112 is 20°, the angle between the principal ray emitted by the light-emitting assembly 112 and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 is less than or equal to 30°, so as to prevent the principal ray from being excessively deviated and affecting the light utilization efficiency of the near-eye display device 10.

[0045] It should be noted that, compared with the light emitting components 112 located at the edge of the field of view, the light emitted by the light emitting components 112 located at the center of the field of view is less likely to affect the imaging quality of the near-eye display device 10. Figure 3 and Figure 4 As shown, in Figure 4In the illustrated embodiment, the principal ray emitted by the light-emitting assembly 112 located in the center field of view coincides with the central axis of the light-emitting surface 1122 of the light-emitting assembly 112. Because the principal ray emitted by the light-emitting assembly 112 passes through the optical axis of the projection lens assembly 12, the light ray h emitted by the light-emitting assembly 112 is reflected by the light guide module 13 back to the display module 11. The light ray i, which is then reflected by the display module 11, substantially coincides with the light ray h, making it less likely to form ghost images that differ from the image displayed by the light ray h. Furthermore, because the light ray i undergoes multiple reflections by the light guide module 13 and the display module 11, its intensity is much lower than that of the light ray h. Even if ghost images do form, they are covered by the image of the light ray h, thus less likely to affect the imaging quality of the near-eye display device 10.

[0046] Therefore, in some embodiments, while the principal light rays emitted by the light-emitting components 112 located in the peripheral field of view are tilted relative to the central axis of the light-emitting surface 1122 of the light-emitting components 112 to reduce the formation of ghost images caused by at least a portion of the light emitted by the light-emitting components 112 in the peripheral field of view returning to the display module 11, the principal light rays emitted by the light-emitting components 112 located in the central field of view can be parallel to or overlap with the central axis of the light-emitting surface 1122 of the light-emitting components 112. This arrangement not only helps reduce ghost images in the near-eye display device 10, but also eliminates the need to adjust the principal light rays emitted by the light-emitting components 112 in the full field of view, thereby simplifying the design and manufacturing process of the display module 11.

[0047] Based on the difference in imaging of reflected light between the edge field of view and the center field of view, refer to Figure 3 、 Figure 4 and Figure 5 As shown, in some embodiments, in the direction from the central field of view to the edge field of view, that is, in the direction from the geometric center of the surface of the display module 11 facing the projection lens assembly 12 to the edge, the angle between the main light emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 gradually increases. Figure 5 In the illustrated embodiment, the main light emitted by the light-emitting component 112 located in the central field of view is parallel to the central axis of the light-emitting surface 1122 of the light-emitting component 112, while the angle between the main light emitted by the light-emitting component 112 located in the edge field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 is greater than half of the light collection cone angle of the corresponding projection lens assembly 12. Figure 5 The horizontal axis is the viewing angle of the display module 11 corresponding to the position of the light emitting component 112, and the vertical axis is the angle between the main light emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112. Figure 5 It can be seen that in this embodiment, as the field of view angle at the corresponding position increases, the angle between the main light emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 also gradually increases.

[0048] It is understandable that in Figure 5 In the illustrated embodiment, since the angle between the main light ray emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 increases as the field of view angle increases, the angle between the main light ray emitted by the light-emitting component 112 located between the central field of view and the edge field of view, for example, located in the quasi-central field of view, and the central axis of the light-emitting surface 1122 of the light-emitting component 112 may not be greater than half of the light collection cone angle of the projection lens assembly 12 corresponding to the quasi-central field of view. Therefore, part of the light emitted by the light-emitting component 112 located in the quasi-central field of view may still form a ghost image.

[0049] Specific combination Figure 6 As shown, the chief ray emitted by the light-emitting assembly 112 located in the quasi-center field of view is inclined with respect to the central axis of the light-emitting surface 1122 of the light-emitting assembly 112. However, the angle between the chief ray emitted by the light-emitting assembly 112 located in the quasi-center field of view and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 is smaller than the light collection cone angle of the projection lens assembly 12 corresponding to the quasi-center field of view. Light ray j emitted by the light-emitting assembly 112 located in the quasi-center field of view is reflected by the light guide module 13 and then by the display module 11 to form light ray k. At least a portion of light ray k deviates from the corresponding light collection cone angle of the projection lens assembly 12 and cannot return to the light guide module 13, forming a ghost image. Furthermore, a portion of light ray k may be located within the corresponding light collection cone angle of the projection lens assembly 12. This portion of light ray k may be received by the projection lens assembly 12 and projected onto the light guide module 13, forming a ghost image.

[0050] Therefore, in this embodiment, the near-eye display device 10 can minimize the ghost images formed by the light-emitting components 112 located in the edge field of view, and partially eliminate the ghost images formed by the light-emitting components 112 located in the quasi-central field of view. The light-emitting components 112 located in the central field of view are less likely to form ghost images, and even if ghost images are formed, the impact on the imaging quality of the near-eye display device 10 is relatively small, thereby improving the imaging quality of the near-eye display device 10 and enhancing the user experience of the user 20. At the same time, the angle between the main light emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 increases as the field of view angle increases, which is beneficial to the design and manufacture of the display module 11.

[0051] In some embodiments, the angle between the main light emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 is proportional to the field of view angle, which can reduce the design and molding difficulty of the display module 11. Figure 5 As shown, in some embodiments, the angle between the main light emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 is equal to the field of view angle corresponding to the light emitting component 112. This can effectively reduce ghost images and is also beneficial to the design and manufacture of the display module 11. Figure 5 It can be seen that half of the light collection cone angle of the projection lens group 12 in this embodiment is 10°, and the near-eye display device 10 can minimize the risk of ghost images formed by the light emitted by the light-emitting component 112 with a corresponding field of view angle greater than or equal to 10°.

[0052] It should be noted that Figure 3 The diagram only shows two of the light-emitting components 112 located in the edge field of view. In fact, the surface of the substrate 111 facing the projection module can be distributed in an array with multiple light-emitting components 112, and multiple light-emitting components 112 located in the edge area of ​​the substrate 111 can all be located in the edge field of view. Multiple light-emitting components 112 can also be provided at positions corresponding to the central field of view of the substrate 111. The number and arrangement pattern of the light-emitting components 112 can be designed according to the requirements of the pixels and field of view of the display module 11.

[0053] It should be noted that Figure 5 Only the relationship between the angle between the main light and the central axis and the corresponding field of view angle in one embodiment is illustrated, but the setting of the display module 11 is not limited to this, as long as it can play a role in eliminating at least part of the ghost image. For example, in some embodiments, in the direction from the central field of view to the edge field of view, the angle between the main light emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 gradually increases, but is not proportional to the field of view angle. In other embodiments, the angles between the main light emitted by the light-emitting component 112 with a corresponding field of view angle greater than or equal to 10° and the central axis of the light-emitting surface 1122 of the light-emitting component 112 can be equal, and both are equal to or equal to 10°, which can also minimize the ghost images produced by the light-emitting component 112 with a corresponding field of view angle greater than or equal to 10°.

[0054] Please see again Figure 3 It is understood that when the light g reflected by the display module 11 deviates from the corresponding light collection cone angle of the projection lens assembly 12, the light g cannot be received by the projection lens assembly 12 and projected toward the light guide module 13. The light g may be absorbed by the outer frame (not shown) of the display module 11, the substrate 111, or components with weaker reflective effects in the light emitting assembly 112 after one or more reflections. Of course, part of the light g may also be incident on the projection lens assembly 12 after one or more reflections and projected into the light guide module 13. In this case, because the light g is relatively scattered and loses its conjugate property with the light emitted by the light emitting assembly 112, the light g entering the light guide module 13 will form background stray light instead of ghost images, which can also reduce the impact of ghost images on imaging quality.

[0055] From the above records, we can see that Figure 5In the embodiment shown, the light emitted by the light emitting assembly 112 with a field of view angle less than 10° may still produce ghost images, affecting the imaging quality of the near-eye display device 10. In other embodiments, the main light emitted by the light emitting assembly 112 within the full field of view, including the edge field of view, the quasi-central field of view, and the central field of view, is inclined to the central axis of the light emitting surface 1122 of the light emitting assembly 112. Figure 7 As shown, Figure 7 The horizontal axis is the viewing angle of the display module 11, and the vertical axis is the angle between the main light emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112. Figure 7 The dotted line in represents the light collection cone angle of the projection lens assembly 12 , and the solid line represents the angle between the main light emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 .

[0056] Depend on Figure 7 It can be seen that in some embodiments, the angles between the main light emitted by the light-emitting component 112 within the full field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 are greater than the light-collecting cone angle of the projection lens group 12, so that the light emitted by the light-emitting component 112 within the full field of view can be reflected back to the display module 11 through the light guide module 13, and the reflected light generated by the reflection of the display module 11 deviates from the light-collecting cone angle of the projection lens group 12, thereby minimizing the ghost images generated by the full field of view light and improving the imaging quality of the near-eye display device 10.

[0057] refer to Figure 7 As shown, in some embodiments, the angles between the main light emitted by the light emitting component 112 and the central axis of the light emitting surface 1122 of the light emitting component 112 are equal within the entire field of view, which is conducive to the batch design and manufacturing of the light emitting component 112, thereby greatly reducing the design and manufacturing difficulty of the display module 11. Figure 7 In the illustrated embodiment, the angle between the chief ray emitted by the light-emitting assembly 112 and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 is 15° throughout the entire field of view. Of course, this angle can be set differently, as long as it is greater than or equal to the corresponding light collection cone angle of the projection lens assembly 12. Specifically, in some embodiments, the angle between the chief ray emitted by the light-emitting assembly 112 and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 throughout the entire field of view is between 10° and 30°, which can maximize ghost image reduction while preventing excessive deviation of the chief ray and thus affecting the light utilization efficiency of the near-eye display device 10. Of course, the angles between the chief ray emitted by the light-emitting assembly 112 and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 throughout the entire field of view can also be different, as long as they are greater than the corresponding light collection cone angle of the projection lens assembly 12 to maximize ghost image reduction throughout the entire field of view.

[0058] Combine Figure 7 and Figure 8 As shown, Figure 8 The light L shown is the light emitted by the light emitting assembly 112 located in the center field of view, the light m is the reflected light formed by the light L being reflected by the light guide module 13 and then reflected by the display module 11, the light n is the light emitted by the light emitting assembly 112 located in the edge field of view, the light o is the reflected light formed by the light n being reflected by the light guide module 13 and then reflected by the display module 11, and both the light m and the light o are outside the light collection cone angle range of the projection lens assembly 12. Figure 7 and Figure 8 In the illustrated embodiment, the angles between the main light emitted by the light-emitting component 112 within the full field of view and the central axis of the light-emitting surface 1122 of the light-emitting component 112 are greater than or equal to the corresponding light-collecting cone angle of the projection lens group 12. Therefore, the reflected light formed by the light emitted by the light-emitting component 112 within the full field of view after being reflected by the light guide module 13 and the display module 11 deviates from the corresponding light-collecting cone angle of the projection lens group 12, thereby minimizing ghost images in the full field of view.

[0059] Of course, the specific configuration method of making the main light emitted by the light emitting assembly 112 inclined to the central axis of the light emitting unit 1121 is not limited, as long as the effect of reducing at least part of the ghost image is achieved. Figure 3 and Figure 9 As shown, in some embodiments, by deviating the optical axis p of the lens unit 1123 in the light-emitting assembly 112 from the central axis q of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121, the principal light ray r emitted by the light-emitting assembly 112 is inclined with respect to the central axis q of the light-emitting unit 1121. Specifically, in some embodiments, the light-emitting assembly 112 further includes a substrate 1124 and a reflective element 113, wherein the reflective element 113 is disposed on the substrate 1124, the light-emitting unit 1121 is disposed on a side of the reflective element 113 facing away from the substrate 1124, and the lens unit 1123 is disposed on a side of the light-emitting assembly 112 facing away from the substrate 1124, or is disposed on the substrate 1124 and covers the light-emitting unit 1121.

[0060] In some embodiments, the lens unit 1123 may be a lens or lens assembly with optical power, configured to adjust the light emitted by the light emitting unit 1121 and project the light toward the projection lens assembly 12. For example, the lens unit 1123 may be a collimating lens or collimating lens assembly with positive optical power, configured to collimate the light emitted by the light emitting unit 1121 and project the light toward the projection lens assembly 12. This, combined with the configuration of the projection lens assembly 12, can improve the parallelism of the light emitted by the display module 11 and the projection lens assembly 12, thereby facilitating improved imaging quality of the near-eye display device 10.

[0061] It is understandable that when the lens unit 1123 is a spherical lens, the optical axis of the lens unit 1123 passes through the center of the surface of the lens unit 1123 away from the light-emitting unit 1121. Among the light emitted by the light-emitting unit 1121, the propagation direction of the light passing through the center of the surface of the lens unit 1123 remains unchanged, while the light passing through the rest of the surface of the lens unit 1123 is usually deflected by the lens unit 1123 and changes its propagation direction, so that the light emitted by the light-emitting unit 1121 forms a roughly parallel beam after passing through the lens unit 1123. In the display module of a traditional near-eye display device, the optical axis of the lens unit of the light-emitting component usually overlaps with the central axis of the light-emitting unit. The light emitted by the light-emitting unit along the central axis direction just passes through the center of the lens unit surface, while the light emitted from the rest of the light-emitting unit is usually deflected toward the center of the lens unit surface when passing through the surface of the projection unit. The light emitted by the traditional light-emitting component is roughly symmetrically distributed relative to the center of the lens unit surface. Therefore, the main light emitted by a traditional light-emitting component usually overlaps with the optical axis of the lens unit and the central axis of the light-emitting unit, causing the reflected light formed by the light reflection of the light guide module and the display module to remain within the light collection cone angle of the projection lens group, and easily return to the light guide module to produce ghost images.

[0062] refer to Figure 9 As described above, in some embodiments of the present application, the optical axis of the lens unit 1123 of the light-emitting assembly 112 deviates from the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121, thereby causing the emission angle of light passing through the center of the surface of the lens unit 1123 to be inclined relative to the central axis of the light-emitting unit 1121. In other words, the main light emitted by the light-emitting assembly 112 is inclined relative to the central axis of the light-emitting unit 1121. Therefore, when the light-emitting assembly 112 is used in the display module 11 of the near-eye display device 10, the light emitted by the light-emitting assembly 112 is reflected by the light guide module 13 and the display module 11 to form reflected light that is at least partially located outside the light collection cone angle range of the projection lens assembly 12 and cannot be projected by the projection lens assembly 12 to the light guide module 13, thereby achieving the effect of reducing at least part of the ghost image.

[0063] It should be noted that in Figure 9In the illustrated embodiment, the lens unit 1123 is offset from the central axis of the light-emitting unit 1121 along a direction perpendicular to the central axis of the light-emitting unit 1121, that is, along the surface of the reflective element 113, but the optical axis of the lens unit 1123 remains parallel to the central axis of the light-emitting unit 1121. In other embodiments, the optical axis of the lens unit 1123 may also be tilted relative to the central axis of the light-emitting unit 1121. For example, the lens unit 1123 as a whole may be tilted relative to the reflective element 113. This is sufficient as long as the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 are offset by a certain amount in a direction perpendicular to the central axis of the light-emitting unit 1121 so that the main light emitted by the light-emitting assembly 112 is tilted relative to the central axis of the light-emitting unit 1121.

[0064] In some embodiments of the present application, the near-eye display device 10, by laterally offsetting the lens unit 1123 of the light-emitting assembly 112, causes the main light emitted by the light-emitting assembly 112 to be inclined relative to the central axis of the light-emitting unit 1121. This eliminates at least some ghost images without affecting the arrangement of the light-emitting assembly 112 in the display module 11, or changing the arrangement between any two of the display module 11, the projection lens assembly 12, and the light guide module 13. For example, the display module 11 and the light guide module 13 are not tilted relative to each other, and the direction of light projected by the light guide module 13 toward the eyeball of the user 20 is not affected. Therefore, the near-eye display device 10 of the present application, while eliminating at least some ghost images, does not excessively increase the difficulty of designing and manufacturing the near-eye display device 10, and does not affect the viewing experience of the user 20.

[0065] Combine Figure 5 、 Figure 9 and Figure 10 As shown, it can be understood that the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in the direction perpendicular to the central axis of the light-emitting unit 1121 affects the angle between the main light emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112. The larger the offset, the larger the angle between the main light and the central axis. Figure 5 In the embodiment shown, as the field of view angle corresponding to the light-emitting component 112 increases, the angle between the main light emitted by the light-emitting component 112 and the central axis of the light-emitting component 112 becomes larger, and thus the offset between the optical axis p of the lens unit 1123 in the light-emitting component 112 and the central axis q of the light-emitting unit 1121 in the direction perpendicular to the central axis of the light-emitting unit 1121 also becomes larger.

[0066] Specific reference Figure 10 As shown, Figure 10The horizontal axis is the viewing angle of the display module 11, and the vertical axis is the offset of the optical axis of the lens unit 1123 relative to the central axis of the light emitting unit 1121 in a direction perpendicular to the central axis of the light emitting unit 1121. Figure 5 and Figure 10 It can be seen that as the field of view angle increases, the angle between the main light emitted by the light-emitting component 112 and the central axis of the light-emitting surface 1122 of the light-emitting component 112 gradually increases. Correspondingly, the offset of the optical axis of the lens unit 1123 in the light-emitting component 112 relative to the central axis of the light-emitting unit 1121 in the direction perpendicular to the central axis of the light-emitting unit 1121 also increases.

[0067] Combine Figure 10 and Figure 11 As shown, in some embodiments, in the light-emitting assembly 112 located in the center field of view, the optical axis of the lens unit 1123 coincides with the central axis of the light-emitting unit 1121. When the field of view angle is equal to half of the light collection cone angle of the projection lens assembly 12, that is, 10°, the angle between the chief light ray emitted by the light-emitting assembly 112 and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 is also 10°, and the offset between the optical axis of the lens unit 1123 in the light-emitting assembly 112 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 is 4 μm. Figure 10 Examples and Figure 5 Corresponding to the embodiment of the present invention, the offset of the optical axis of the lens unit 1123 relative to the central axis of the light emitting unit 1121 increases with the increase of the field of view angle, and the offset is proportional to the field of view angle.

[0068] Of course, in other embodiments, the offset may not be proportional to the field of view angle, as long as at least some ghost images can be eliminated. For example, in other embodiments, the offset of the optical axis of the lens unit 1123 relative to the central axis of the light-emitting unit 1121 in the quasi-central field of view and the peripheral field of view is any applicable value greater than or equal to 4 μm, and the offset value of each light-emitting component 112 may be equal or unequal. Of course, the offset of the optical axis of the lens unit 1123 relative to the central axis of the light-emitting unit 1121 in the quasi-central field of view and the peripheral field of view may also be between 2 μm and 4 μm, which can achieve the effect of eliminating some ghost images.

[0069] Similarly, combined Figure 7 and Figure 12 As shown, when the main light rays emitted by the light emitting assembly 112 within the full field of view are all inclined to the central axis of the light emitting surface 1122 of the light emitting assembly 112, the optical axis of the lens unit 1123 in the light emitting assembly 112 within the full field of view deviates from the central axis of the light emitting unit 1121. Figure 12 The embodiment shown is Figure 7Correspondingly, the angle between the chief light ray emitted by the light-emitting assembly 112 and the central axis of the light-emitting surface 1122 of the light-emitting assembly 112 within the full field of view is 15°. In the light-emitting assembly 112 within the full field of view, the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 is 12 μm. Of course, the offset of the lens unit 1123 in the light-emitting assembly 112 within the full field of view can also be different, as long as both are greater than or equal to 4 μm to effectively reduce ghost images within the full field of view.

[0070] It is understood that the light emitted by the light-emitting unit 1121 must be incident on the lens unit 1123 in order to be effectively projected onto the projection lens assembly 12. If the lens unit 1123 is too offset relative to the light-emitting unit 1121, some of the light may not be deflected by the lens unit 1123 and projected onto the projection lens assembly 12. Therefore, in some embodiments, the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 is less than or equal to 12 μm. This prevents the lens unit 1123 from excessively deviating from the light-emitting unit 1121 and reducing the light extraction efficiency of the light-emitting assembly 112.

[0071] It should be understood that the specific numerical values ​​for the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121, as illustrated in this application, are merely numerical values ​​for the offsets cited based on the correspondence between the specific structure of the light-emitting assembly 1121 and the chief ray angle as illustrated in this application. In practice, those skilled in the art will appreciate that the correspondence between the chief ray angle and the aforementioned offset may also change when the structural features of the light-emitting assembly 1121 are changed.

[0072] Specifically, in Figure 9In the illustrated embodiment, the line connecting the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121, the central axis q of the light-emitting unit 1121, and the chief ray r form a right triangle. In this right triangle, the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 is the size of one of the right-angled sides, and the portion of the central axis q of the light-emitting unit 1121 within the right triangle is the other right-angled side. Thus, in this triangle, the ratio of the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 to the size of the portion of the central axis q of the light-emitting unit 1121 within the triangle is equal to the tangent of the angle between the chief ray r and the central axis q of the light-emitting unit 1121. In the present application, the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 can be calculated based on the above-mentioned tangent relationship. It is understandable that when the structure of the lens unit 1123 changes, for example, the size of the lens unit 1123 in the axial direction changes, or the position of the center of the surface of the lens unit 1123 changes, resulting in a change in the position of the optical axis of the lens unit 1123, the size of the portion of the central axis q of the light-emitting unit 1121 within the triangle also changes. Accordingly, the angle between the principal ray r and the central axis q of the light-emitting unit 1121 (the principal ray angle) and the corresponding relationship between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 will also change. In summary, when the structure of the light-emitting component 112 changes, the offset between the optical axis of the lens unit 1123 and the central axis of the light-emitting unit 1121 in a direction perpendicular to the central axis of the light-emitting unit 1121 at the same principal ray angle may also change. The specific offset can be calculated based on the above description, as long as an angle can be formed between the principal ray r and the central axis of the light-emitting unit 1121 to achieve the effect of eliminating at least part of the ghost light.

[0073] It should be noted that when the surface of the lens unit 1123 is spherical, the optical axis of the lens unit 1123 passes through the center of the surface of the lens unit 1123 away from the light-emitting unit 1121, and the line connecting the center of the surface of the lens unit 1123 away from the light-emitting unit 1121 and the center of the surface of the light-emitting unit 1121 toward the lens unit 1123 can be regarded as coinciding with the main light emitted by the light-emitting component 112. Then, the angle between the main light emitted by the light-emitting component 112 and the central axis of the light-emitting unit 1121 is equal to the angle between the line connecting the center of the surface of the lens unit 1123 away from the light-emitting unit 1121 and the center of the surface of the light-emitting unit 1121 toward the lens unit 1123 and the central axis of the light-emitting unit 1121.

[0074] It is understood that there may be multiple light emitting components 112 located in the edge field of view in the display module 11, and the multiple light emitting components 112 located in the edge field of view may have different orientations on the substrate 111. In order to ensure that the light emitted by the light emitting components 112 located in different orientations of the edge field of view can be smoothly emitted into the projection lens assembly 12, the deviation direction of the lens unit 1123 of the light emitting component 112 located in the edge field of view relative to the light emitting unit 1121 may also be different. For example, referring to Figure 3 As shown, Figure 3 The two light-emitting assemblies 112 shown are both located at the edge of the viewing field, but in different orientations, with each being positioned at opposite edges of the substrate 111. To ensure that light emitted by both light-emitting assemblies 112 can enter the projection lens assembly 12, the lens units 1123 of each light-emitting assembly 112 are offset relative to the light-emitting unit 1121 toward the center of the viewing field. In other words, the lens units 1123 of each light-emitting assembly 112 are offset relative to their respective light-emitting units 1121 toward each other, resulting in a symmetrical arrangement of the two light-emitting assemblies 112 about the center of the viewing field. The offset direction of the lens units 1123 in light-emitting assemblies 112 located in other orientations can be deduced from the above description, as long as it can change the direction of the main light emitted by the light-emitting assemblies 112 and ensure that the light emitted by the light-emitting assemblies 112 can be received by the projection lens assembly 12.

[0075] The specific structural design of the light-emitting component 112 is not limited. In some embodiments, the surface of the light-emitting unit 1121 facing the reflective element 113 and the surface facing away from the reflective element 113 are both the light-emitting surface 1122 of the light-emitting unit 1121, wherein the light emitted from the light-emitting surface 1122 of the light-emitting unit 1121 facing away from the reflective element 113 is directly incident on the surface of the lens unit 1123, and the light emitted from the light-emitting surface 1122 of the light-emitting unit 1121 toward the reflective element 113 can be reflected by the reflective element 113 and then incident on the surface of the lens unit 1123. Thus, in some embodiments, the orthographic projection of the lens unit 1123 on the reflective element 113 covers the light emitting range of the light emitting unit 1121. For example, the lens unit 1123 covers the light emitting range of the light emitting unit 1121 that faces away from the light emitting surface 1122 of the reflective element 113. The lens unit 1123 also covers the range of reflected light emitted by the light emitting unit 1121 toward the light emitting surface 1122 of the reflective element 113 and reflected by the reflective element 113 toward the lens unit 1123. This allows the lens unit 1123 to receive and project the light emitted by the light emitting unit 1121 to the projection lens assembly 12 to the greatest extent possible, thereby improving the light extraction efficiency of the light emitting assembly 112. It is understood that the light emitted by the light emitting unit 1121 can either directly enter the lens unit 1123 or be reflected by the reflective element 113 and then enter the lens unit 1123. Therefore, the lens unit 1123 can be considered to be disposed on the light emitting side of the light emitting unit 1121.

[0076] Of course, in the present application, the configuration of the light-emitting assembly 112 is not limited to the above description. In other embodiments, the lens unit 1123 may not be a hemispherical spherical mirror, and the lens unit 1123 of the light-emitting assembly 112 may also adopt other configurations to change the emission direction of the main light of the light-emitting assembly 112. For example, in other embodiments, the lens unit 1123 may be elliptical or aspherical. Furthermore, the lens unit 1123 may include two or more lenses. By changing the orientation of the elliptical lens and the position of the elliptical lens relative to the light-emitting unit 1121, or changing the curvature and curvature variation pattern of the aspherical lens, or by changing the orientation and position of multiple lenses relative to each other and the light-emitting unit 1121, the light regulation effect of different positions of the lens unit 1123 relative to the central axis of the light-emitting unit 1121 can be adjusted, thereby changing the emission direction of the main light of the light-emitting assembly 112, and thereby achieving the effect of reducing at least some ghost images.

[0077] In the present application, the reflective element 113 includes but is not limited to a metal or dielectric material sputtered or evaporated on the substrate 1124 , and the light-emitting unit 1121 may be a Micro LED chip grown on the reflective element 113 .

[0078] In some embodiments, the lens unit 1123 is disposed on the reflective element 113 and covers the light-emitting unit 1121. That is, except for the surface of the light-emitting unit 1121 that contacts the reflective element 113, the remaining surface of the light-emitting unit 1121 is encapsulated by the lens unit 1123. Thus, the lens unit 1123 can not only provide insulation and structural protection for the light-emitting unit 1121, but also effectively project the light emitted by the light-emitting unit 1121 toward the projection lens assembly 12. Of course, in other embodiments, the lens unit 1123 can also be spaced apart from the reflective element 113 and disposed on the side of the light-emitting unit 1121 facing away from the reflective element 113, as long as the orthographic projection of the lens unit 1123 on the reflective element 113 can cover the light output range of the light-emitting unit 1121.

[0079] exist Figure 3 and Figure 4 In the illustrated embodiment, the display module 11 may be a Micro LED display screen, and all the light-emitting components 112 in the display module 11 may be disposed on the same substrate 111 , and all the light-emitting components 112 are arranged in an array on the same surface of the substrate 111 .

[0080] Of course, the near-eye display device 10 of the present application may also adopt any other applicable type of display module 11. Figure 13 As shown, in some embodiments, the display module 11 of the near-eye display device 10 can be a self-luminous single-panel color Micro-LED micro display screen. The display module 11 may include a light-combining prism 114, which may be an X-Cube light-combining prism. In this embodiment, the light-emitting components 112 of the display module 11 are all used to emit monochromatic light in the visible light range, and the display module 111 includes three substrates 111. Among them, some light-emitting components 112 are used to emit red light, some light-emitting components 112 are used to emit green light, and some light-emitting components 112 are used to emit blue light. In addition, the light-emitting components 112 for emitting red light are arranged on one of the substrates 111 and form a red light module 115 with the substrate 111. The light-emitting components 112 for emitting green light are arranged on another substrate 111 and form a green light module 116 with the substrate 111. The light-emitting components 112 for emitting blue light are arranged on another substrate 111 and form a blue light module 117 with the substrate 111. The red light module 115 , the green light module 116 , and the blue light module 117 are respectively disposed on different sides of the light-combining prism 114 . For example, the red light module 115 and the blue light module 117 are respectively disposed on opposite sides of the light-combining prism 114 , and the green light module 116 is disposed on a side of the light-combining prism 114 facing away from the projection lens assembly 12 .

[0081] In this embodiment, the red light module 115, the green light module 116, and the blue light module 117 all emit light toward the light-combining prism 114. The light emitted by the red light module 115, the green light module 116, and the blue light module 117 are integrated by the light-combining prism 114 and projected toward the projection lens assembly 12, which is then projected toward the light guide module 13 by the projection lens assembly 12. It is understood that in this embodiment, some of the light-emitting components 112 in the red light module 115, the green light module 116, and the blue light module 117 are located in the central field of view of the display module 11, some are located in the quasi-central field of view of the display module 11, and some are located in the edge field of view of the display module 11. The structures of the light-emitting components 112 can be the same as those in FIG. Figure 9 Therefore, the arrangement and arrangement of the light emitting components 112 in the display module 11 can refer to Figure 5 、 Figure 7 、 Figure 10 and Figure 12 It is obtained that, for example, the main light emitted by the light-emitting component 112 located in the edge field of view in the red light module 115, the green light module 116 and the blue light module 117 is inclined to the central axis of the light-emitting surface 1122 of the light-emitting component 112, or the main light emitted by the light-emitting component 112 in the full field of view in the red light module 115, the green light module 116 and the blue light module 117 is inclined to the central axis of the light-emitting surface 1122 of the light-emitting component 112. More settings of the light-emitting component 112 in this embodiment can be inferred from the above records and will not be repeated here. Of course, the type of display module 11 of the near-eye display device 10 is not limited to this. The near-eye display device 10 can also adopt any applicable display module 11 that can meet AR or MR imaging, as long as the main light emitted by the light-emitting component 112 located in the edge field of view in the display module 11 can be inclined to the central axis of the light-emitting surface 1122 of the light-emitting component 112 to eliminate at least part of the ghost image.

[0082] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A near-eye display device, characterized in that: The invention comprises a projection lens assembly, a light guide module and a display module, wherein the projection lens assembly is arranged between the light guide module and the display module, the display module has a central field of view and a peripheral field of view, the display module comprises a substrate and a plurality of light-emitting components, the plurality of light-emitting components are arranged in an array on the substrate, wherein the main light emitted by the light-emitting components located in the peripheral field of view is inclined to the central axis of the light-emitting surface of the light-emitting components; the light-emitting components comprise a base, a light-emitting unit and a lens unit, the light-emitting unit is arranged on the base, and the lens unit is arranged on the light-emitting side of the light-emitting unit, wherein the optical axis of the lens unit is parallel to the central axis of the light-emitting unit, and in the light-emitting component in which the main light emitted is inclined to the central axis of the light-emitting surface, the optical axis of the lens unit deviates from the central axis of the light-emitting unit in a direction perpendicular to the central axis of the light-emitting unit; The lens unit is provided on a side of the substrate close to the light emitting unit and at least partially covers the light emitting unit; Part of the light emitted by the light-emitting component is projected onto the light guide module via the projection lens group, reflected back to the display module via the light guide module, and then reflected by the display module and projected onto the projection lens group. The light-emitting component can prevent at least part of the reflected light from deviating from the light collection cone angle of the projection lens group and preventing it from entering the light guide module.

2. The near-eye display device according to claim 1, wherein: The deviation between the optical axis of the lens unit and the central axis of the light-emitting unit in a direction perpendicular to the central axis is greater than or equal to 4 um and less than or equal to 12 um.

3. The near-eye display device according to claim 1, wherein: An angle between a line connecting the center of a surface of the lens unit facing away from the light-emitting unit and the center of a surface of the light-emitting unit facing the lens unit and a central axis of the light-emitting unit is greater than or equal to 5°.

4. The near-eye display device according to claim 1, wherein: An angle between a line connecting the center of a surface of the lens unit facing away from the light-emitting unit and the center of a surface of the light-emitting unit facing the lens unit and the central axis of the light-emitting unit is greater than or equal to 10° and less than or equal to 30°.

5. The near-eye display device according to claim 1, wherein: The light-emitting assembly further includes a reflective element disposed between the substrate and the light-emitting unit. The light-emitting unit has light-emitting surfaces facing toward and away from the reflective element. The orthographic projection of the lens unit on the reflective element covers the light-emitting range of the light-emitting unit.

6. The near-eye display device according to claim 1, wherein: The deviation between the optical axis of the lens unit and the central axis of the light-emitting unit in a direction perpendicular to the central axis is greater than or equal to 2 μm.

7. The near-eye display device according to claim 1, wherein: The angle between the main light emitted by the light-emitting component located in the edge field of view and the central axis of the light-emitting surface of the light-emitting component is greater than or equal to 5°.

8. The near-eye display device according to claim 7, wherein: The angle between the main light emitted by the light-emitting component located in the edge field of view and the central axis of the light-emitting surface of the light-emitting component is greater than or equal to 10° and less than or equal to 30°.

9. The near-eye display device according to claim 1, wherein: The main light emitted by the light-emitting component located in the central field of view is parallel to the central axis of the light-emitting surface of the light-emitting component.

10. The near-eye display device according to claim 1, wherein: In the direction from the central field of view to the edge field of view, the angle between the main light emitted by the light-emitting component and the central axis of the light-emitting surface of the light-emitting component gradually increases.

11. The near-eye display device according to claim 10, wherein: The angle between the main light emitted by the light-emitting component and the central axis of the light-emitting surface of the light-emitting component is equal to the field of view angle corresponding to the light-emitting component.

12. The near-eye display device according to claim 1, wherein: The main light rays emitted by the light-emitting component within the entire field of view are all inclined to the central axis of the light-emitting surface of the light-emitting component.

13. The near-eye display device according to claim 12, wherein: The angles between the main light emitted by the light-emitting component within the full field of view and the central axis of the light-emitting surface of the light-emitting component are equal.

14. The near-eye display device according to claim 1, wherein: The lens unit is arranged on the substrate and covers the light emitting unit.

15. The near-eye display device according to claim 1, wherein: The display module also includes a light-combining prism, part of the light-emitting components are used to emit red light, part of the light-emitting components are used to emit green light, and part of the light-emitting components are used to emit blue light, wherein the light-emitting components for emitting red light, the light-emitting components for emitting green light, and the light-emitting components for emitting blue light are respectively arranged on different sides of the light-combining prism.

16. The near-eye display device according to claim 1, wherein: The angle between the main light emitted by the light-emitting component located in the edge field of view and the central axis of the light-emitting surface of the light-emitting component is greater than or equal to half of the light collection cone angle of the projection lens assembly at the corresponding position.

Images