Near-to-eye display device and manufacturing method of near-to-eye display device

Abstract

The invention provides a near-to-eye display device. The near-to-eye display device comprises a display screen and a light guiding module. The display screen is used for emitting image light. The light guiding module is used for receiving the image light and projecting the image light to human eyes, so that the image light located at the position of the eye box is received by the human eyes. Wherein the display screen is arranged at the position of an imaging surface focused by a plurality of beams of light with different field angles, which are projected to the light guide module from the position of the eye box. The invention further provides a manufacturing method of the near-to-eye display device. The manufacturing method is used for manufacturing the near-to-eye display device.

Description

Technical Field

[0001] The present application relates to the field of near-eye display devices, and in particular to a near-eye display device and a method for manufacturing a near-eye display device. Background Art

[0002] With the development of science and technology, Virtual Reality (VR) technology is applied to various fields, such as games, education, medical treatment, retail, etc. The common optical design schemes of VR display devices on the market currently include aspherical lens design scheme, Fresnel lens design scheme and folded optical path (Pancake) design scheme.

[0003] Among them, compared with the aspherical lens design and the Fresnel lens design, the Pancake design can greatly reduce the size of the VR display device. As users have higher and higher requirements for the imaging quality and field of view of VR display devices, the Pancake design also needs to develop in the direction of higher imaging quality and a larger field of view. However, in the Pancake design, if you want to increase the field of view, you need to increase the size of the optical lens group, increase the size of the display screen, or increase the curvature of the optical lens. If you want to enhance the imaging quality, you need to reduce the curvature of the optical lens. Therefore, there are some technical contradictions between the need to increase the field of view and the need to enhance the imaging quality. It is difficult to optimize the Pancake design while meeting both requirements. Summary of the invention

[0004] A first aspect of the present application provides a near-eye display device, comprising: a display screen for emitting image light; and A light guiding module, for receiving the image light and projecting the image light to the human eye, so that the image light located at the position of the eye box is received by the human eye; Wherein, the display screen is arranged at a position where an imaging surface where multiple beams of light with different field angles are projected from the position of the eye box to the light guiding module is focused.

[0005] The near-eye display device provided in the embodiment of the present application is provided with a display screen, and the display screen is provided at the position of the imaging surface where multiple beams of light with different field angles projected from the position of the eye box to the light guiding module are focused; since the light is reversible, the image light emitted from the display screen can also be incident on the position of the eye box through the light guiding module, which is beneficial to increase the proportion of light received by the human eye, which is beneficial to increase the field angle of the near-eye display device, and further beneficial to enhance the user's sense of immersion in the picture when using it; in addition, since the position of the display screen and the position of the imaging surface coincide with each other, it can be more effectively ensured that the light emitted from each area on the display surface can be clearly converged to the eye box for imaging, which is beneficial to improve the image distortion caused by aberration, chromatic aberration or distortion, and further beneficial to improve the imaging quality of the near-eye display device.

[0006] In one embodiment, the display screen includes a display surface for emitting the image light, and a shape of the display surface is the same as a shape of the imaging surface.

[0007] In one embodiment, the size of the display surface is the same as the size of the imaging surface.

[0008] In one embodiment, the display screen is a curved screen, and the display screen includes a cover plate, and the display surface of the cover plate is a curved surface.

[0009] In one embodiment, the light guiding module includes a first lens, a semi-reflective and semi-transparent film, a second lens, a composite film layer and a third lens, wherein the first lens is used to receive the image light emitted from the display screen, and the semi-reflective and semi-transparent film is arranged on a side of the first lens close to the second lens; the composite film layer is arranged between the second lens and the third lens, and the composite film layer is used to receive and change the polarization state of the image light so that the image light is transmitted from the third lens.

[0010] In one embodiment, the composite film layer includes a phase retardation layer and a reflective polarization layer, the phase retardation layer is arranged on a side of the second lens away from the first lens, and the reflective polarization layer is arranged on a side of the third lens close to the second lens.

[0011] A second aspect of the present application provides a method for manufacturing a near-eye display device, which is used to manufacture the near-eye display device as described in any of the above embodiments, comprising: Acquire parameters of the near-eye display device, the parameters including the size of the eye box and geometric parameters and optical performance parameters of the light guiding module; Establishing a reverse light path model according to the parameters, the reverse light path model includes a plurality of light beams with different field angles projected from the position of the eye box and the light guiding module for receiving and guiding the light beams; Calculating an imaging surface according to a plurality of image-side focal coordinates formed by focusing the plurality of light beams with different field angles after passing through the light guiding module; The display screen is manufactured according to the imaging surface so that the shape of the display surface of the display screen is the same as the shape of the imaging surface.

[0012] The manufacturing method of the near-eye display device provided in the embodiment of the present application is used to manufacture the near-eye display device as described in any of the above embodiments, by acquiring the parameters of the near-eye display device to establish a reverse light path model, and calculating the imaging surface according to the multiple image focus coordinates formed by the multiple beams of light with different field of view angles after passing through the light guiding module and focusing, and then manufacturing the display screen according to the imaging surface, and the shape of the display surface is the same as the shape of the imaging surface. When the manufactured display screen is used for the near-eye display device, since the light is reversible, the image light emitted from the display screen can also be incident on the position of the eye box through the light guiding module, which is beneficial to increase the proportion of light received by the human eye, which is beneficial to increase the field of view of the near-eye display device, and further helps to enhance the user's sense of immersion in the picture when using it; in addition, since the position of the display screen coincides with the position of the imaging surface, it can more effectively ensure that the light emitted from each area on the display surface can be clearly converged to the eye box for imaging, which is beneficial to improve the image distortion caused by aberration, chromatic aberration or distortion, and further helps to improve the imaging quality of the near-eye display device.

[0013] In one embodiment, the step of calculating the imaging surface according to a plurality of image-side focal coordinates formed by focusing the plurality of light beams with different field angles through the light guiding module comprises: Acquire the image-side focal coordinates of the multiple light beams with different field angles; The curvature or the surface equation of the imaging surface is calculated based on the multiple image-side focal coordinates.

[0014] In one embodiment, the step of manufacturing the display screen according to the imaging surface includes: Provide a cover plate and a display module; bending the cover plate according to the shape of the imaging surface; The display module is attached to the bent cover plate.

[0015] In one embodiment, the step of bending the cover plate according to the shape of the imaging surface is specifically to bend the cover plate by using a hot bending technology.

[0016] In one embodiment, the steps after manufacturing the display screen according to the imaging surface include: The display screen is installed at the position of the imaging surface where multiple beams of light with different viewing angles projected from the position of the eye box to the light guiding module are focused.

[0017] In one embodiment, the steps after installing the display screen to the position of the imaging surface where multiple beams of light with different field angles projected from the position of the eye box to the light guiding module are focused include: Performing a performance test on the near-eye display device, emitting multiple beams of light with different field angles from the position of the eye box, and determining whether the near-eye display device meets the light spot size requirement; If the spot size requirement is met, the manufacturing of the near-eye display device is completed; if the spot size requirement is not met, the step of obtaining the parameters of the near-eye display device is re-executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic diagram of an optical path of a near-eye display device according to an embodiment of the present application.

[0019] Figure 2 Schematic diagram of the structure of a near-eye display device according to an embodiment of the present application.

[0020] Figure 3 Schematic diagram of a process for manufacturing a near-eye display device according to an embodiment of the present application.

[0021] Figure 4 This is a light path diagram of a reverse light path model established using ZEMAX software in one embodiment of the present application.

[0022] Figure 5 Detailed flowchart of step S300 of an embodiment of the present application.

[0023] Figure 6 A schematic diagram of a light path of an imaging surface obtained by calculation according to an embodiment of the present application.

[0024] Figure 7 Detailed description of step S400 of an embodiment of the present application.

[0025] Figure 8 The method for manufacturing a near-eye display device according to an embodiment of the present application is a flowchart diagram including step S500 and step S600.

[0026] Fig. 9 The figure is a schematic diagram of light spots of multiple light beams with different field angles projected from the position of the eye box through the light guiding module in the prior art.

[0027] Fig.10 Schematic diagram of light spots of multiple beams of light with different field angles projected from the position of the eye box through the light guiding module in the present application.

[0028] Description of main component symbols: Near-eye display device: 100 Display: 1 Cover: 11 Display surface: 111 Display modules: 13 Light guide module: 3 First lens: 31 Semi-reflective and semi-permeable membrane: 32 Second lens: 33 Composite film layer: 34 Phase Delay Layer: 341 Reflective polarizing layer: 343 Third lens: 35 Eye box: 5 Image light: L1 Human eye: E Backlight model: 700 Image focus: 71 Imaging area: 73 Light spot: B Steps: S100, S200, S300, S31, S32, S400, S41, S42, S43, S500, S600 The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0030] It should be noted that when a component is referred to as being "fixed to" or "mounted on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. The term "and / or" used herein includes all and any combinations of one or more related listed items. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0031] In order to further explain the technical means and effects adopted by the present application to achieve the intended purpose, the present application is described in detail below in conjunction with the accompanying drawings and preferred implementation methods.

[0032] Please also read Figure 1 , Figure 2 and Figure 6The near-eye display device 100 of the embodiment of the present application includes a display screen 1 and a light guiding module 3. The display screen 1 is used to emit image light L1. The light guiding module 3 is used to receive the image light L1 and project the image light L1 to the human eye E, so that the image light L1 located at the position of the eye box 5 is received by the human eye E. The display screen 1 is arranged at a position where a plurality of light beams with different field angles projected from the position of the eye box 5 to the light guiding module 3 are focused on the imaging surface 73.

[0033] The eye box 5 is a conical area, and the image light L1 located at the position of the eye box 5 can be received by the human eye E, that is, the eye box 5 area is the area where the display content is clearest. In this embodiment, the size of the eye box 5 is 10mm×10mm; in other embodiments, the size of the eye box 5 can also be 20mm×20mm or other values, which are not limited in this application. In this embodiment, the near-eye display device 100 is a virtual reality head-mounted near-eye display device 100. In other embodiments, the near-eye display device 100 can also be any one of an augmented reality head-mounted near-eye display device 100, a mixed reality head-mounted near-eye display device 100, and a head-up near-eye display device 100, which are not limited in this application.

[0034] Specifically, the display screen 1 includes a cover plate 11 and a display module 13 attached to the cover plate 11. The cover plate 11 includes a display surface 111 for emitting image light L1. In this embodiment, the shape of the display surface 111 is the same as the shape of the imaging surface 73. Specifically, the size of the display surface 111 is the same as the size of the imaging surface 73, that is, the shape of the display surface 111 is the same as the shape of the imaging surface 73 solved by the inverse light path model, and the size is also the same; in other embodiments, the shape of the display surface 111 is the same as the shape of the imaging surface 73, but the size is different, and this application does not limit it.

[0035] In this embodiment, the display surface 111 is a curved surface, that is, the display module 13 attached to the cover plate 11 is also curved, that is, the display screen 1 is a curved screen. In other embodiments, according to the focus position of multiple beams of light with different field angles projected from the position of the eye box 5 to the light guide module 3, the display surface 111 may also be a plane or an irregular surface, and this application does not limit it. The display module 13 is any one of a liquid crystal display module 13, a quick response liquid crystal display module 13, a light emitting diode display module 13, an organic light emitting diode display module 13, and a micro light emitting diode display module 13.

[0036] The light guide module 3 includes a first lens 31, a semi-reflective and semi-transmissive film 32, a second lens 33, a composite film layer 34 and a third lens 35. The first lens 31 is used to receive the image light L1 emitted from the display screen 1. The semi-reflective and semi-transmissive film 32 is arranged on the side of the first lens 31 close to the second lens 33, and the semi-reflective and semi-transmissive film 32 is used to partially transmit and partially reflect the image light L1. The composite film layer 34 is arranged between the second lens 33 and the third lens 35, and the composite film layer 34 is used to receive and change the polarization state of the image light L1 so that the image light L1 is transmitted from the third lens 35. The composite film layer 34 includes a phase delay layer 341 and a reflective polarization layer 343. In this embodiment, the phase retardation layer 341 is disposed on a side of the second lens 33 away from the first lens 31, and the reflective polarizing layer 343 is disposed on a side of the third lens 35 close to the second lens 33; in other embodiments, the reflective polarizing layer 343 is disposed on a side of the third lens 35 close to the second lens 33, and the phase retardation layer 341 is disposed on a side of the reflective polarizing layer 343 away from the third lens 35.

[0037] Specifically, the first lens 31 receives an image light L1 with a circular polarization state; the image light L1 passes through the first lens 31 and is incident on the semi-reflective film 32. When incident on the semi-reflective film, half of the energy of the image light L1 passes through the semi-reflective film and is incident on the second lens 33; the image light L1 passes through the second lens 33 and is incident on the composite film layer 34, wherein the phase delay layer 341 is used to convert the image light L1 from a circular polarization state to a linear polarization state. The image light L1 that passes through the phase delay layer 341 for the first time is reflected by the reflective polarization layer 343. After passing through the phase delay layer 341 for the second time, it is incident on the semi-reflective film again, wherein a portion of the image light L1 (at this time, the energy of the image light L1 is one-fourth of that before being incident on the first lens 31) is reflected back to the composite film layer 34 by the semi-reflective film. After passing through the phase delay layer 341 for the third time, the linearly polarized image light L1 continues to pass through the reflective polarization layer 343, passes through the third lens 35, and finally is incident on the human eye E.

[0038] The near-eye display device 100 provided in the embodiment of the present application is provided with a display screen 1, and the display screen 1 is provided at the position of the imaging surface 73 where multiple beams of light with different field angles are projected from the position of the eye box 5 to the light guiding module 3 and focused. Since the light is reversible, the image light L1 emitted from the display screen 1 can also be incident on the position of the eye box 5 through the light guiding module 3, which is beneficial to increase the proportion of light received by the human eye E, and is beneficial to increase the field angle of the near-eye display device 100, and further is beneficial to enhance the user's sense of immersion in the picture when using it; in addition, since the position of the display screen 1 coincides with the position of the imaging surface 73, it can be more effectively ensured that the light emitted from each area on the display surface 1 can be clearly converged to the eye box 5 for imaging, which is beneficial to improve the imaging quality of the near-eye display device 100.

[0039] Please also read Figure 1 and Figure 3 The manufacturing method of the display screen 1 provided in the embodiment of the present application is used to manufacture a near-eye display device as in any of the above embodiments, including the following steps S100 to S400. It should be noted that the manufacturing method of the display screen 1 of the present application is not limited to the order of the following steps, and in other embodiments, the manufacturing method of the display screen 1 may include only part of the following steps, or some of the steps may be deleted.

[0040] Step S100: Acquire parameters of the near-eye display device, including the size of the eye box and geometric parameters and optical performance parameters of the light guiding module.

[0041] Step S200: establishing a reverse light path model according to the parameters, wherein the reverse light path model includes a plurality of light beams with different field angles projected from the position of the eye box and a light guiding module for receiving and guiding the light beams.

[0042] Step S300: calculating an imaging surface according to a plurality of image-side focal coordinates formed by focusing a plurality of light beams with different field angles through a light guiding module.

[0043] Step S400: manufacturing a display screen according to the imaging surface, so that the shape of the display surface of the display screen is the same as the shape of the imaging surface.

[0044] In this embodiment, the size of the eye box 5 in step S100 is 10mm×10mm; in other embodiments, the size of the eye box 5 may also be 20mm×20mm or other values, which are not limited in this application. The geometric parameters of the light guiding module 3 specifically include: the thickness, aperture, radius of curvature, Abbe number of the first lens 31, the second lens 33 and the third lens 35, and the refractive index of the first lens 31, the semi-reflective and semi-transparent film 32, the second lens 33, the composite film layer 34 and the third lens 35. The optical performance parameters of the light guiding module 3 specifically include: the focal length, field of view, optical transfer function and wavefront difference of the first lens 31, the second lens 33 and the third lens 35. In other embodiments, when the near-eye display device 100 includes other optical elements, the geometric parameters and optical performance parameters of the optical elements may also include other types, which are not limited in this application.

[0045] Please also read Figure 3 and Figure 4In step S200, a reverse light path model 700 is established according to the parameters, and the reverse light path model 700 can be established by using MATLAB software or ZEMAX software. In this embodiment, the reverse light path model 700 is established by using ZEMAX software; specifically, the size of the eye box 5 in the near-eye display device 100, the geometric parameters of the light guide module 3, and the optical performance parameters are input into the ZEMAX software, and then the eye box 5 originally used to receive the light is used as a device for emitting light, and the reverse light path model 700 output by the ZEMAX software can be obtained. The reverse light path model 700 includes multiple beams of light with different field angles projected from the position of the eye box 5 and a light guide module 3 for receiving and guiding the light. The light beams with different field angles emitted from the eye box 5 are all converged by the light guide module 3 to the side of the optical element away from the eye box 5, thereby forming multiple image-side focal points 71.

[0046] Please also read Figure 3 and Figure 5 Specifically, step S300 includes steps S31 to S32, wherein the step of calculating the imaging surface according to the multiple image focal coordinates formed by focusing multiple light beams with different field angles through the light guiding module includes steps S31 to S32: Step S31: Obtaining the image-side focal coordinates of a plurality of light beams with different field angles.

[0047] Step S32: Calculate the curvature or surface equation of the imaging surface according to the multiple image-side focal coordinates.

[0048] Please also read Figure 4 , Figure 5 and Figure 6 Specifically, in step S31, the image focus 71 coordinates of multiple beams of light with different field angles are obtained according to the reverse light path model 700 established by ZEMAX software. For example, the image focus 71 coordinates of the light with a field angle of 0°, the image focus 71 coordinates of the light with a field angle of 10°, the image focus 71 coordinates of the light with a field angle of 21°, the image focus 71 coordinates of the light with a field angle of 35°, and the image focus 71 coordinates of the light with a field angle of 50° can be selected. In this embodiment, the imaging surface 73 is a curved surface; in other embodiments, the imaging surface 73 can also be a plane or other surface with an irregular shape, which is not limited in itself. In step S32, the curvature or surface equation of the imaging surface 73 is obtained according to the multiple image focus 71 coordinates. For example, the curvature or surface equation of the imaging surface 73 can be obtained by MATLAB software, thereby obtaining the curvature or surface equation of the imaging surface 73, and then the imaging surface 73 is calculated according to the curvature or surface equation of the imaging surface 73.

[0049] Please also read Figure 1 , Figure 3 and Figure 7Specifically, the step S400 of making a display screen according to the imaging surface includes steps S41 to S43: Step S41: providing a cover plate and a display module.

[0050] Step S42: bending the cover plate according to the shape of the imaging surface.

[0051] Step S43: attaching the display module to the bent cover plate.

[0052] In this embodiment, the material of the cover plate 11 in step S41 is glass. The use of a glass cover plate 11 is conducive to bending the cover plate 11 according to the shape of the imaging surface 73, and is conducive to the stability of the cover plate 11 after bending. In other embodiments, the material of the cover plate 11 can also be plastic, which is not limited in this application. The display module 13 is any one of a liquid crystal display module 13, a quick response liquid crystal display module 13, a light emitting diode display module 13, an organic light emitting diode display module 13, and a micro light emitting diode display module 13.

[0053] Specifically, in step S42, the cover plate 11 is bent according to the shape of the imaging surface 73 by using the hot bending technology. The hot bending technology refers to the technology of heating the initial flat cover plate material to the bending temperature and then bending the initial cover plate 11. By using the hot bending technology to bend the cover plate 11 according to the shape of the imaging surface 73, it is helpful to reduce the stress rebound phenomenon when the cover plate 11 is bent according to the shape of the imaging surface 73, and it is helpful to increase the stability of the cover plate 11 after forming.

[0054] Specifically, in step S43, the display module 13 is bonded to the cover plate 11, and the cover plate 11 and the display module 13 are bonded by a planar cover plate 11 generation process, so as to obtain a display screen 1 that satisfies the shape of the imaging surface 73, that is, the display surface 111 of the display screen 1 for emitting the image light L1 coincides with the imaging surface 73. In this embodiment, the imaging surface 73 is a curved surface, and the display surface 111 that coincides with the imaging surface 73 is also a curved surface, that is, the display module 13 bonded to the cover plate 11 is also curved. In other embodiments, in other embodiments, the imaging surface 73 may also be a plane or other surface with an irregular shape, which is not limited in itself.

[0055] See also Figure 8 After step S400 of manufacturing a display screen according to the imaging surface, the process further includes steps S500 to S600: Step S500: installing the display screen to the position of the imaging surface where multiple beams of light with different field angles projected from the position of the eye box to the light guiding module are focused.

[0056] Step S600: Perform a performance test on the near-eye display device, emit multiple beams of light with different field angles from the position of the eye box, and determine whether the near-eye display device meets the spot size requirement; if the spot size requirement is met, the production of the near-eye display device is completed; if the spot size requirement is not met, re-execute the step of obtaining the parameters of the near-eye display device.

[0057] Please also read Figure 8 , Fig. 9 and Fig.10 After step S500 is completed, step S600 is performed. Specifically, in step S600, a schematic diagram of a light spot B of multiple beams of light with different field angles projected from the position of the eye box through the light guiding module can be obtained, and a schematic diagram of a light spot B obtained by a display screen using the prior art (an ordinary display screen, not a display screen obtained according to the position where multiple beams of light with different field angles projected from the position of the eye box to the light guiding module are focused), such as Fig. 9 As shown, Fig.10 The schematic diagram of the light spot B of multiple beams of light with different field angles projected from the position of the eye box through the light guide module in the present application, by comparing the schematic diagram of the light spot B obtained by the display screen of the present application with the schematic diagram of the light spot B obtained by the prior art, it is found that the light spot B of the present application is smaller, that is, the aberration is smaller and the contrast is better, then the light spot B size requirement is met, that is, the near-eye display device is manufactured. If the light spot B size requirement is not met by comparing the light spot B schematic diagram obtained by the display screen of the present application with the light spot B schematic diagram obtained by the prior art, the step of obtaining the parameters of the near-eye display device is re-executed.

[0058] The manufacturing method of the near-eye display device provided in the embodiment of the present application is used to manufacture a near-eye display device such as any of the above embodiments, by obtaining the parameters of the near-eye display device to establish a backlight path model, and calculating the imaging surface according to the multiple image focus coordinates formed by focusing multiple beams of light with different field of view angles through a light guiding module, and then manufacturing a display screen according to the imaging surface, the shape of the display screen is the same as the shape of the imaging surface, when the manufactured display screen is used for the near-eye display device, since the light is reversible, the image light emitted from the display screen can also be incident on the position of the eye box through the light guiding module, which is beneficial to increase the proportion of light received by the human eye, which is beneficial to increase the field of view of the near-eye display device, and further helps to enhance the user's sense of immersion in the picture when using it; in addition, since the position of the display screen coincides with the position of the imaging surface, it can more effectively ensure that the light emitted from each area of ​​the display surface can be clearly converged to the eye box for imaging, which is beneficial to improve the image distortion caused by aberration, chromatic aberration or distortion, and further helps to improve the imaging quality of the near-eye display device.

[0059] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of protection claimed in the present application.

Claims

1. A near-eye display device, characterized in that: include: A display screen, the display screen being used to emit image light; as well as A light guiding module, for receiving the image light and projecting the image light to the human eye, so that the image light located at the position of the eye box is received by the human eye; Wherein, the display screen is arranged at a position where an imaging surface where multiple beams of light with different field angles are projected from the position of the eye box to the light guiding module is focused.

2. The near-eye display device according to claim 1, wherein: The display screen includes a display surface for emitting the image light, and the shape of the display surface is the same as the shape of the imaging surface.

3. The near-eye display device according to claim 2, wherein: The size of the display surface is the same as the size of the imaging surface.

4. The near-eye display device as claimed in claim 2 or 3, characterized in that: The display screen is a curved screen, and the display screen comprises a cover plate, and the display surface of the cover plate is a curved surface.

5. The near-eye display device according to claim 1, wherein: The light guiding module includes a first lens, a semi-reflective and semi-transparent film, a second lens, a composite film layer and a third lens, wherein the first lens is used to receive the image light emitted from the display screen, and the semi-reflective and semi-transparent film is arranged on a side of the first lens close to the second lens; the composite film layer is arranged between the second lens and the third lens, and the composite film layer is used to receive and change the polarization state of the image light so that the image light is transmitted from the third lens.

6. The near-eye display device according to claim 5, characterized in that: The composite film layer includes a phase retardation layer and a reflective polarization layer. The phase retardation layer is arranged on a side of the second lens away from the first lens, and the reflective polarization layer is arranged on a side of the third lens close to the second lens.

7. A method for manufacturing a near-eye display device, used for manufacturing the near-eye display device according to any one of claims 1 to 6, characterized in that: include: Acquire parameters of the near-eye display device, the parameters including the size of the eye box and geometric parameters and optical performance parameters of the light guiding module; Establishing a reverse light path model according to the parameters, the reverse light path model includes a plurality of light beams with different field angles projected from the position of the eye box and the light guiding module for receiving and guiding the light beams; Calculating an imaging surface according to a plurality of image-side focal coordinates formed by focusing the plurality of light beams with different field angles after passing through the light guiding module; The display screen is manufactured according to the imaging surface so that the shape of the display surface of the display screen is the same as the shape of the imaging surface.

8. The method for manufacturing a near-eye display device according to claim 7, wherein: The step of calculating the imaging surface according to a plurality of image-side focal coordinates formed by focusing the plurality of light beams with different field angles through the light guiding module comprises: Acquire the image-side focal coordinates of the multiple light beams with different field angles; The curvature or the surface equation of the imaging surface is calculated based on the multiple image-side focal coordinates.

9. The method for manufacturing a near-eye display device according to claim 7, wherein: The step of manufacturing the display screen according to the imaging surface comprises: Provide a cover plate and a display module; bending the cover plate according to the shape of the imaging surface; The display module is attached to the bent cover plate.

10. The method for manufacturing a near-eye display device according to claim 9, wherein: The step of bending the cover plate according to the shape of the imaging surface is specifically to bend the cover plate by using a hot bending technology.

11. The method for manufacturing a near-eye display device according to claim 7, wherein: The steps after manufacturing the display screen according to the imaging surface include: The display screen is installed at the position of the imaging surface where multiple beams of light with different viewing angles projected from the position of the eye box to the light guiding module are focused.

12. The method for manufacturing a near-eye display device according to claim 11, wherein: The steps after installing the display screen to the position of the imaging surface where multiple beams of light with different field angles projected from the position of the eye box to the light guide module are focused include: Performing a performance test on the near-eye display device, emitting multiple beams of light with different field angles from the position of the eye box, and determining whether the near-eye display device meets the light spot size requirement; If the spot size requirement is met, the manufacturing of the near-eye display device is completed; if the spot size requirement is not met, the step of obtaining the parameters of the near-eye display device is re-executed.

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