A handy short-focus near-sighted viewing system

Abstract

A lightweight short-focus near-eye display system, which is related to the technical field of near-eye display, solves the contradiction between optical performance and volume existing in the conventional AR technology, the system includes a micro display, an inner lens and a concave partial reflector, the inner lens is close to the pupil position, the concave partial reflector is far from the pupil position, and the micro display is a rotating linear array display or a transparent display. Through multiple reflections, the optical path is folded, the distance between the convex reflector and the concave partial reflector is shortened, and the thickness of the glasses can be reduced to the maximum extent, thereby realizing light and thin glasses.

Description

[Technical field]

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on March 19, 2021, application number 202110297398.X, entitled "Portable short-focus near-eye display system," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of near-eye viewing technology, and more particularly to a portable short focus near-eye viewing system. [Background technology]

[0003] Near-sighted display can provide users with an extra-large 3D screen and allow the displayed image to be integrated with the real environment, and is therefore widely applied in both daily life and industrial fields.

[0004] At present, the most promising is the optical waveguide AR glasses, which can achieve an appearance similar to that of ordinary glasses, but due to restrictions such as refractive index and diffraction efficiency, the viewing angle is difficult to break through, and is generally about 50° diagonally, and its biggest drawback is that the energy efficiency is very low, so the entire system consumes a lot of power. Based on the ball symmetry technology, the inventor has previously applied for a series of patent technologies (Chinese patent numbers: 202020742439, 202120312789.X, 202110154039), and the above patents achieve very ideal optical effects, but the total thickness is large. Summary of the Invention [Problem to be solved by the invention]

[0005] The present application provides a lightweight short focus near-eye display system to solve the problem that the near-eye display system of the conventional display system is thick and cannot be made thin. [Means for solving the problem]

[0006] 1. A portable short focus near-eye display system, comprising: a microdisplay; an inner lens; and a concave partial reflector, the inner lens being proximate to a pupil position and the concave partial reflector being positioned away from the pupil position, the microdisplay being a rotating linear array microdisplay or a transparent microdisplay, the inner lens being a convex reflector; The microdisplay is provided between the inner lens and a pupil position, or between the inner lens and a concave partial reflector, or on a convex side of the concave partial reflector; When the microdisplay is disposed between the inner lens and the pupil position, the microdisplay emits light facing away from the pupil position, and the number of reflections of the light emitted by the microdisplay between the inner lens and the concave partially reflecting mirror is ≧3; When the microdisplay is disposed between the inner lens and the concave partial reflector, the microdisplay emits light away from the pupil position or toward the pupil position, and the number of reflections of the light emitted by the microdisplay between the inner lens and the concave partial reflector is ≧3; When the microdisplay is disposed on the convex side of the concave partial reflector, the microdisplay emits light toward the pupil position, and the number of reflections of the light emitted by the microdisplay between the inner lens and the concave partial reflector is ≧4. It is a lightweight, short-focus, near-eye display system.

[0007] Furthermore, the concave or convex surface of the inner lens is a polarizing reflecting surface, and a phase delay is provided between the inner lens and the concave partial reflecting mirror. wavelength A plate is added, and an ambient light circular polarizer is disposed on the convex side of the concave partial reflector, the ambient light circular polarizer is used to convert natural ambient light into a first circularly polarized ambient light, and the first circularly polarized ambient light has a phase retardation wavelength After passing through the plate, it becomes S-shaped linearly polarized ambient light and enters the human eye.

[0008] Furthermore, the number of reflections of the light emitted by the microdisplay between the inner lens and the concave partial reflector is three, the concave or convex surface of the inner lens is a polarized reflecting surface, and when the microdisplay is located between the inner lens and the concave partial reflector, a phase retardation wave plate is disposed between the microdisplay and the inner lens; If a microdisplay is provided between the inner lens and the pupil position, a phase retarding waveplate is disposed between the inner lens and the concave partially reflecting mirror.

[0009] Furthermore, the linear array Micro The display includes a light-emitting pixel, a transparent conductive wire, and a display driving chip, the transparent conductive wire connects the light-emitting pixel and the display driving chip, and the distance between the light-emitting pixel and the display driving chip is greater than 1 mm; The arrangement of the light-emitting pixels is one, half, two arranged in a cross shape, or four arranged in a U-shape, Furthermore, both side regions of the light-emitting pixel are transparent regions, partially reflective surfaces or polarized reflective surfaces. When both side regions are partially reflective surfaces, they are replaced by concave partially reflective mirrors, and when both side regions are polarized reflective surfaces, they are replaced by inner lenses.

[0010] The light emitted by the microdisplay is reflected three times between the inner lens and the concave partial reflector, the concave partial reflector is a strip-shaped partial reflector that rotates synchronously with the linear array microdisplay, and an outer protective lens is disposed on one side of the strip-shaped partial reflector.

[0011] Furthermore, the number of reflections of the light emitted by the microdisplay between the inner lens and the concave partial reflector is set to four, the concave or convex surface of the inner lens is a polarized reflecting surface, the inner lens is strip-shaped in a direction that coincides with the pixel arrangement direction of the linear array microdisplay, the concave partial reflector is a strip-shaped partial reflector, and the inner lens, the strip-shaped partial reflector, and the linear array microdisplay rotate synchronously. A strip-shaped central total reflection film is plated at the center of the inner lens, and the width of the central total reflection film is smaller than the pupil diameter of the human eye; The inner lens Strip-shaped partial reflector A phase retardation waveplate is disposed between the linear array microdisplay and a polarizing film layer is disposed in front of the light-emitting pixels of the linear array microdisplay.

[0012] Furthermore, instead of a strip-shaped partially reflecting mirror, both side areas of the light-emitting pixel of the linear array microdisplay are made into partially reflecting surfaces, the linear array microdisplay rotates synchronously with the inner lens, an inner protective lens is added to the left side of the inner lens, and an outer protective lens is added to the side away from the pupil of the linear array microdisplay, and both the inner protective lens and the outer protective lens are provided with a rotation axis.

[0013] Furthermore, when the number of reflections of the light emitted by the microdisplay between the inner lens and the concave partial reflector is greater than four, one surface of the inner lens is made a polarized reflecting surface, a phase retardation wave plate is added between the inner lens and the concave partial reflector, and the partial reflecting surface of the concave partial reflector is made a surface whose reflected circular polarization direction can be dynamically adjusted, so that the microdisplay emits pulsed circularly polarized light, and the concave partial reflector is configured to maintain the reflected circular polarization direction unchanged. When the number of reflections of the light reaches a predetermined number, the partial reflecting surface of the concave partial reflector is made a normal mirror surface, and after being reflected by the normal mirror surface, it enters the human eye.

[0014] Furthermore, when the number of reflections of the light emitted by the microdisplay between the inner lens and the concave partial reflector is greater than four, one surface of the inner lens is made a switchable mirror, and the microdisplay is controlled to emit pulsed light; when the number of reflections has not reached a predetermined number, the switchable mirror reflects the light; when the number of reflections reaches a predetermined number, the switchable mirror enters a transmissive state and transmits the light to enter the human eye.

[0015] Furthermore, the inner lens and the concave partial reflector are merged into an integrated lens, the micro display is arranged to emit light toward one side of the integrated lens, and the inner surface of the integrated lens is a switchable mirror; The light emitted by the microdisplay is reflected between the inner surface of the integrated lens and the outer surface of the integrated lens, and when the number of reflections reaches a predetermined number, the light passes through the inner surface of the integrated lens and enters the human eye. Effect of the Invention

[0016] When the display system of the present application has three reflections between the inner lens and the concave partial reflector, the folding of the optical path reduces the lens thickness and makes it more compact, further increasing the exit pupil distance, and adding a phase retardation waveplate and a reflective polarizer can provide a highly energy-efficient display. When the number of reflections is four, the thickness can be further reduced and the dimensions of the microdisplay can be increased, making it easier to manufacture. The advantage of having more reflections is that the thickness of the system can be reduced.

[0017] The present application provides a lightweight short focus near-eye viewing system that folds the optical path through multiple reflections, thereby reducing the overall thickness of the glasses and increasing the exit pupil distance, making them more comfortable for users to wear and more aesthetically pleasing.

[0018] This application reduces the light energy loss due to central occlusion by specially designing the linear array microdisplay, and eliminates the central occlusion problem by using a transparent rotating shaft.

[0019] Linear Array Micro By synchronously rotating the display and the strip-shaped concave reflector, the transmittance of the ambient light can be greatly improved, thereby improving the ambient brightness. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a ray diagram of a portable, short-focus, near-eye display system with three reflections according to the present application, with a microdisplay to the right of the inner lens. [Diagram 2]FIG. 2 is a ray diagram of another portable, short-focus, near-eye display system with three reflections, with the microdisplay to the left of the inner lens. [Diagram 3] FIG. 13 is a ray diagram of the present application's portable short focus near-eye display system with three reflections, where the microdisplay is on the right side of the inner lens, and a phase retardation waveplate is added. [Figure 4] FIG. 13 is a ray diagram of the present application's portable short focus near-eye display system with three reflections, where the microdisplay is to the left of the inner lens, and a phase retardation waveplate is added. [Diagram 5] FIG. 1 is a schematic diagram showing how environmental stray light is eliminated by adding circularly polarized light to the outside of a concave partially reflecting mirror according to the present application. [Figure 6] 1A and 1B are schematic diagrams of a linear array microdisplay according to the present application, in which (a) is a schematic diagram of a linear array microdisplay whose upper and lower portions are mirror symmetric in the yx plane, and (b) is a schematic diagram of a linear array microdisplay whose upper and lower portions are symmetric in the yx plane. [Figure 7] FIG. 1 is a diagram showing the configuration of a cross-shaped linear array microdisplay according to the present application. [Figure 8] FIG. 2 is a schematic cross-sectional view of a linear array microdisplay in the xz plane. [Figure 9] FIG. 1 is a diagram showing the optical path and mounting structure of a linear array microdisplay without reflective film layers on both sides. [Figure 10] FIG. 2 is a diagram showing the optical path and mounting structure of a linear array microdisplay having a reflective film layer. [Figure 11] FIG. 1 is a diagram showing the optical path and configuration of a linear array microdisplay rotating synchronously with a strip-shaped concave reflector. [Figure 12] This is a three-dimensional configuration diagram of a linear array microdisplay rotating synchronously with a strip-shaped concave reflector. [Figure 13] FIG. 2 is a ray diagram of a portable, short-focus, near-eye display system with four reflections according to the present application, in which the microdisplay is to the right of the concave partial reflector. [Figure 14]FIG. 2 is a ray diagram of a portable, short-focus, near-eye display system with four reflections according to the present application, in which the microdisplay is to the left of the concave partially reflecting mirror. [Figure 15] FIG. 2 is a diagram illustrating the principle of how the portable short-focus near-eye display system with four reflections according to the present application improves reflection efficiency by using a phase retardation waveplate. [Figure 16] FIG. 1 is an optical path assembly diagram of a portable short focus near-eye display system having four reflections according to the present application, in which (a) is an optical path and assembly schematic diagram in which a microdisplay is to the left of a concave partial reflector, and (b) is a cross-sectional schematic diagram in the xz plane of a linear array microdisplay. [Figure 17] 1A and 1B are schematic diagrams of polarization changes in an optical path having more than four reflections according to the present application and capable of dynamically changing the direction of reflected circular polarization, in which (a) is a diagram of an optical path capable of dynamically changing the direction of reflected circular polarization, and (b) is a partially enlarged view of the optical path between the inner lens, the concave partial reflector, and the microdisplay. [Figure 18] FIG. 2 is a ray diagram of a portable short focus near eye viewing system having more than four reflections according to the present application. [Figure 19] FIG. 1 is an optical path diagram of a lightweight short-focus near-eye display system according to the present application, which has more than four reflections, employs an integrated lens, and has a microdisplay disposed to the left of the integrated lens; (a) is a schematic diagram of the microdisplay disposed to the left of the integrated lens, and (b) is a partially enlarged view of the optical path in the direction of travel. [Figure 20] FIG. 1 is an optical path diagram of a lightweight short-focus near-eye display system according to the present application, which has more than four reflections, employs an integrated lens, and has a microdisplay disposed to the right of the integrated lens; (a) is a schematic diagram of the microdisplay disposed to the right of the integrated lens, and (b) is a partially enlarged view of the optical path in the direction of travel. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor all belong to the scope of protection of the present application.

[0022] It should be noted that when a component is said to be "connected" to another component, it may be directly connected to the other component or there may be an intervening component, and when a component is said to be "fixed" to another component, it may be directly connected to the other component or there may be an intervening component. The "left side" is the side facing the pupil position, and the "right side" is the side facing from the pupil to the environment.

[0023] Unless otherwise defined, all technical and scientific terms used in the present embodiment have the same meaning as commonly understood by a person skilled in the art of the present application. The terms used in the specification of the present application are for describing specific examples and are not intended to limit the present application.

[0024] The present embodiment will be described with reference to FIGS. Lightweight The short focus near-eye display optical system includes a microdisplay 4, an inner lens 2 and a concave partial reflector 3, the microdisplay 4 being located to the left of the inner lens 2 or between the inner lens 2 and the concave partial reflector 3, the inner lens 2 being close to a pupil position 1, the concave partial reflector 3 being positioned away from the pupil position 1, and the inner lens 2 being a convex reflector.

[0025] Referring to FIG. 1, when the microdisplay 4 is located between the inner lens 2 and the concave partial reflector 3, the microdisplay 4 emits light facing away from the pupil position 1, and the light emitted by the microdisplay is reflected three times between the inner lens 2 and the concave partial reflector 3.

[0026] The light emitted by the microdisplay 4 is reflected by the concave partial reflector 3. Since the microdisplay 4 is a linear array or transparent, a part of the reflected light can pass through the microdisplay 4 and reach the inner lens 2. The concave surface 2-1 or convex surface 2-2 of the inner lens 2 has a certain reflectance and can reflect the light. The reflected light passes through the microdisplay 4 again and then reaches the concave partial reflector 3, which reflects the light again and passes through the microdisplay 4, before passing through the inner lens 2 and reaching the human eye.

[0027] Referring to Figure 2, when the microdisplay 4 is located on the left side (concave surface 2-1) of the inner lens 2, the microdisplay 4 emits light facing away from the pupil position 1, and the light is reflected three times between the inner lens 2 and the concave partial reflector 3.

[0028] The light emitted by the microdisplay first passes through the inner lens 2 and is then reflected by the concave partial reflecting mirror 3. The reflected light reaches the inner lens 2 again. The concave surface 2-1 or convex surface 2-2 of the inner lens 2 has a certain reflectivity and can reflect light rays. After the reflected light reaches the concave partial reflecting mirror 3, it reflects the light again. The reflected light passes through the inner lens 2 and the microdisplay 4 and then reaches the human eye.

[0029] In this embodiment, the microdisplay 4 is a rotating linear array microdisplay 4a or a transparent microdisplay 4b, and the pixels of the transparent microdisplay 4b are distributed on a spherical surface. The inner lens 2 is close to the pupil position 1, and the concave partial reflector 3 is disposed away from the pupil position 1. One surface of the concave partial reflector 3, i.e., the inner surface 3-1 or the outer surface 3-2, has a certain reflectance, e.g., 50%, and a certain transmittance, e.g., 50%, and the sum of the transmittance and the reflectance is close to or equal to 1 within a certain wavelength, e.g., within the visible light range.

[0030] This embodiment will be described with reference to Figures 3 and 4. In this embodiment, the light beam goes back and forth and is folded, resulting in loss of light energy and a certain amount of stray light. To solve this problem, one surface of the inner lens 2, i.e., the concave surface 2-1 or the convex surface 2-2, is made into a polarizing reflective surface, which has the characteristics of reflecting one type of polarized light and transmitting polarized light perpendicular to the polarization direction of the reflected light. For example, a metal wire grid polarizing film has the above characteristics and can be attached to the surface of the optical lens. In addition, a phase retardation film is added to the system. wavelength An improvement in light energy efficiency is achieved by adding plate 6. Preferably, phase retardation wave plate 6 is a quarter wave plate.

[0031] According to the position of the microdisplay 4, there are two different cases. As shown in Fig. 3(a), when the microdisplay 4 is located between the inner lens 2 and the concave partial reflector 3, a phase retardation wave plate 6 may be disposed between the microdisplay 4 and the inner lens 2 and attached to the convex surface 2-2 of the inner lens. As shown in Fig. 3(b), the optical path and polarization change diagram is shown. The micro display 4 emits a first circularly polarized light 7-3, which is reflected by the concave partial reflecting mirror 3 and then changes its rotation direction, for example, the left rotation changes to the right rotation, becoming the second circularly polarized light 7-4, the second circularly polarized light 7-4 passes through the phase retardation wave plate 6 and becomes the p linearly polarized light 7-2, which is all reflected by the polarized reflective film attached to one surface of the inner lens 2, the reflected p linearly polarized light 7-2 passes through the phase retardation wave plate 6 and becomes the second circularly polarized light 7-4 again, the second circularly polarized light 7-4 is reflected by the concave partial reflecting mirror 3 and then changes its rotation direction to become the first circularly polarized light 7-3, the first circularly polarized light 7-3 passes through the phase retardation wave plate 6 and becomes the s linearly polarized light 7-1, and the s linearly polarized light 7-1 passes through the polarized reflective film to reach the pupil position 1. This achieves a display effect with high energy efficiency and low stray light. The p type and s linearly polarized light are named for convenience of explanation, and their directions are not limited.

[0032] As shown in FIG. 4(a), when the microdisplay 4 is located on the left side of the inner lens 2, a phase retardation wave plate 6 is disposed between the inner lens 2 and the concave partial reflector 3, and may be attached to the convex surface 2-2 of the inner lens or the inner surface 3-1 of the concave partial reflector 3. As shown in FIG. 4(b), a light path and polarization change diagram is shown. The microdisplay 4 emits unlimited polarized light 7-5, which is light with an unlimited form of polarization, such as natural light, circularly polarized light, elliptically polarized light, or linearly polarized light. If it is linearly polarized light, the polarization direction must not be perpendicular to the transmission direction of the polarizing reflective film, otherwise it cannot transmit through the polarizing reflective film. After the unlimited polarized light 7-5 passes through the polarized reflective film attached to the inner lens 2, it becomes s linear polarized light 7-1, and after passing through the phase retardation waveplate 6, it becomes the first circular polarized light 7-3. After the first circular polarized light 7-3 is reflected by the concave partial reflecting mirror 3, the rotation direction changes, for example, the left rotation changes to the right rotation, and it becomes the second circular polarized light 7-4. After the second circular polarized light 7-4 passes through the phase retardation waveplate 6, it becomes p linear polarized light 7-2, which is all reflected by the polarized reflective film attached to one surface of the inner lens 2, the reflected p linear polarized light 7-2 passes through the phase retardation waveplate 6 and becomes the second circular polarized light 7-4 again, and after the second circular polarized light 7-4 is reflected by the concave partial reflecting mirror 3, the rotation direction changes to the first circular polarized light 7-3, the first circular polarized light 7-3 passes through the phase retardation waveplate 6 and becomes s linear polarized light 7-1, and the s linear polarized light 7-1 can all pass through the polarized reflective film to reach the pupil position 1. This achieves a display effect with high energy efficiency and low stray light. Such an embodiment is suitable for use in a microdisplay that is transparent. Micro This is very suitable for the display 4b, since there are no specific requirements for the polarization of the light emitted by the microdisplay. Micro To reduce light that the display 4b directs directly to the human eye, a dynamic light blocking layer can be added to block it.

[0033] In this embodiment, in order to realize uniformity of clarity of the displayed image, the inner lens 2, the concave partial reflector 3 and the micro display 4 are distributed on a concentric sphere, and the center of the sphere is the center of the pupil position 1. Since the human eye has a zoom adjustment function, a certain degree of movement of the position of each component or deformation of the surface shape is allowed, and the additional function of such movement is that it is possible to adapt to myopia power and realize dynamic zoom. For example, the inner lens 2 The relative distance between the lens and the concave partial reflector 3 can be dynamically adjusted to realize dynamic zooming, and generally, this zooming function can be realized by providing a voice coil motor.

[0034] The table below shows the optical design parameters when the number of reflections is three and the microdisplay 4 is located between the inner lens 2 and the concave partial reflector 3. The parameters are shown for only one reflection because the position and shape of the device do not change during the process of folding from the virtual image position.

[0035] [Table 1]

[0036] The table below shows the optical design parameters when the microdisplay 4 is located to the left of the inner lens 2. The parameters are shown only once because the position and shape of the device do not change during the folding process from the virtual image position.

[0037] [Table 2]

[0038] If one surface of the inner lens 2 is involved in generating the virtual image, the curvature of the other surface may be varied as a myopia correcting surface to suit the user's power. The two surfaces of the concave partially reflecting mirror 3 can be similarly treated to adjust the power.

[0039] In order to improve the energy utilization rate, one surface of the concave partial reflector 3 may be plated with a reflective filter film, and the film layer is designed according to the emission wavelength of the microdisplay 4. The reflective filter film has a high reflectance for the central wavelength of the emission of the microdisplay 4, for example, reflects more than 90%, while it has a high transmittance for wavelength ranges other than the central wavelength of the emission, for example, transmits more than 90%. Such a design can simultaneously improve the brightness of the ambient light and the virtual image. The reflective filter film may be a dielectric film layer, a dielectric metal composite film layer, a holographic film layer, and a microstructure film layer.

[0040] This embodiment will be described with reference to Figure 5. When a polarizing reflective film is added to the inner lens 2, a part of the ambient light is reflected. The reflected ambient light is reflected again by the concave partial reflector 3, and a phase delay is generated. wavelength After passing through the plate 6, the light passes through the inner lens 2 and becomes stray light. In order to eliminate the stray light, an ambient light circular polarizer 15 is disposed on the right side of the concave partial reflector 3 to convert the ambient light into a first circularly polarized light 7-3 and to cause a phase retardation wavelength After passing through the plate 6 again, it becomes s-linearly polarized light 7-1 and directly enters the human eye. In this way, the formation of stray light caused by ambient light can be prevented. If the concave partial reflector 3 is plated with a reflective filter film for the emission wavelength of the microdisplay, there is no need to install an ambient light circular polarizer 15 on the outside of the concave partial reflector 3, because the light reflected by the polarized reflective film on the inner lens 2 passes through the concave partial reflector 3, and no stray light is formed.

[0041] This embodiment will be described with reference to Fig. 6 to Fig. 8. In this embodiment, the micro display 4 is a linear array Micro If it is a display, it is a linear array Micro Narrower display widths are preferred, for example less than 1 mm. When fabricated using a silicon substrate, the driver chip can be placed under the light-emitting pixels. Narrow linear array displayIn the case where it is difficult to manufacture a transparent conductive wire, the transparent conductive wire can be used to make the whole area wider and not block the line of sight. Micro In the display configuration, transparent conductive wires 4a-2 are used to connect light-emitting pixels 4a-1 of a linear array microdisplay to a linear array display driver chip 4a-3, and the distance between the light-emitting pixels 4a-1 and the display driver chip 4a-3 is greater than 1 mm.

[0042] When there are many pixels, for example, more than 1000 pixels, a plurality of linear array display driving chips 4a-3 can be used to control some pixels, for example, 200 pixels, respectively, so that the size of a single control chip can be reduced and the difficulty of wiring can be reduced. Of course, a configuration in which a single chip drives all the pixels is not excluded. Since the linear array display driving chip 4a-3 is usually opaque, the transparent conductor 4a-2 can increase the distance between the light-emitting pixel 4a-1 of the linear array microdisplay and the linear array display driving chip 4a-3, for example, by 5 mm. In this case, the linear array display driving chip 4a-3 is not in the middle position, and the linear array display driving chip 4a-3 disappears from the view due to the visual persistence effect during rotation, and the shielding effect is avoided. FIG. 6(a) shows an arrangement form of the light-emitting pixel 4a-1 that is vertically mirror-symmetrical, and FIG. 6(b) shows an arrangement form of the light-emitting pixel 4a-1 that is vertically symmetrical, and since it is a rotational display, a complete image can be formed even if 1 / 2 of the line rotates once. As shown in Figure 7, a linear array arranged in a cross shape Micro The display is a linear array display driver chip 4a-3 that can be arranged on the side by using transparent conductors 4a-2 to avoid occlusion. The cross-shaped arrangement improves the brightness of the image and reduces the number of rotations required for rotation. For the same reason, a four-line U-shaped arrangement can be used. This will not be repeated here.

[0043] 8 is a schematic cross-sectional view of the linear array microdisplay in the xz plane, in which the regions 4a-4 on both sides of the light-emitting pixels may be non-functional transparent regions, or may be used as the function of the inner lens 2, i.e., may be polarized reflective surfaces, or may be substituted for the inner lens 2.

[0044] In order to improve energy efficiency and reduce stray light, referring to Figures 3 and 4, the film layer 4a-5 in front of the light-emitting pixel can be a circular or linear polarizing film, which is used to change the characteristics of the emitted light, and its dimension is generally larger than the length covered by the light-emitting angle to ensure the exit pupil diameter of the system. A rotating concave ring 4a-8 is provided behind the center of the light-emitting pixel, which is used for rotation.

[0045] This embodiment will be described with reference to Figs. 9 and 10. The micro display 4 is a linear array MicroIn the case of a display, FIG. 9 shows one kind of assembly schematic diagram, and a rotation axis 2-4 may be provided at the center of the inner lens 2 to limit the radial movement of the linear array microdisplay 4a. The central rotation axis may be transparent or non-transparent to reduce central occlusion, and a smaller size is more preferable, for example, a diameter of 0.5 mm. The fixed position of the rotation axis may be on the inner lens 2 or on the linear array microdisplay 4a, similar to the jewel bearing in a watch, and the rotation position material can be improved by adopting jewels to improve life and accuracy. The edge of the linear array microdisplay 4a is the linear array microdisplay extension end 4a-6, on which a permanent magnet is arranged and rotated as a rotation. A wireless power supply receiving coil is arranged to receive electric energy and supply power to the light-emitting device and the driving circuit. A photoelectric position detector, such as an encoder, can be arranged to obtain the exact position of the rotation in real time, and other necessary peripheral electronic devices, such as a capacitor inductance, need to be arranged. One magnetic ring 4a-7 in the linear array microdisplay may be fixed to the outside of the linear array microdisplay extension end 4a-6. Outside the magnetic ring 4a-7 in the linear array microdisplay, one constrained magnetic ring 8 is arranged on the mirror frame 12, and is fixed to the mirror frame 12. The high-speed magnetic ring 8 and the magnetic ring 4a-7 in the linear array microdisplay are not in contact with each other, and the axial movement of the microdisplay 4 is restricted by magnetic force. A driving coil, a wireless power supply coil, a position locating ring, etc. may be arranged on the inner lens extension end 2-3, and the above devices may be arranged alone on the supplementary function plate 9, and one or all of the driving coil, the wireless power supply coil, and the position locating ring may be arranged on the supplementary function plate 9. The supplementary function plate 9 is fixed to the mirror frame 12.

[0046] 10, when the regions 4a-4 on both sides of the light-emitting pixels of the linear array microdisplay 4a are partially reflective or polarized reflective, light can be reflected. In this case, the reflective film replaces the role of the inner lens 2 in reflecting light, so that the inner lens 2 becomes an inner protective lens 10 without reflection, which is used to protect the rotating structure and may provide rotation support via the intermediate inner protective lens rotation axis 10-1.

[0047] This embodiment will be described with reference to FIG. 11 and FIG. 12. The concave partial reflecting mirror 3 is a strip-shaped partial reflecting mirror 3a, the width of which determines the exit pupil diameter and generally needs to be larger than the pupil of the human eye, and the preferred range is 6 to 15 mm. The strip-shaped partial reflecting mirror 3a rotates synchronously with the linear array microdisplay 4a. At this time, the rotation structure in the linear array microdisplay 4a can be selected from either FIG. 9 or FIG. 10. An outer protective lens 11 is disposed on the right side of the strip-shaped partial reflecting mirror 3a, and an outer protective lens rotation axis 11-1 may also be provided at the center of the outer protective lens 11, which is used to support the rotation. Similarly, it may be made of a transparent material. Since a rotation axis is provided on both the front and rear, the stability of the rotation can be improved. At this time, the axial magnetic force fixing structure formed by the constraining magnetic ring 8 and the magnetic ring 4a-7 inside the linear array microdisplay can be omitted, but if this structure is retained, the stability can be further improved, especially when the user moves, the angular momentum of the rotating member changes, and the magnetic force of the outer ring is likely to generate a large moment, which is used to change the angular momentum of the rotating structure. As shown in Figure 12, the linear array microdisplay 4a rotates synchronously with the strip-shaped concave reflector 3a in a three-dimensional configuration diagram.

[0048] This embodiment will be described with reference to Figures 13 to 16. As shown in Figure 13, when the microdisplay 4 is located on the right side of the concave partial reflecting mirror 3, the microdisplay 4 emits light toward the pupil position 1, and the light is reflected four times between the inner lens 2 and the concave partial reflecting mirror 3.

[0049] The light emitted by the micro display 4 first passes through the concave partial reflector 3 and reaches one surface of the inner lens 2, and one surface of the inner lens 2, the inner lens concave surface 2-1 or the inner lens convex surface 2-2, has a certain reflectivity and can reflect the light, and the reflected light reaches the concave partial reflector 3 again, and the concave partial reflector 3 reflects the light again, and then is reflected again by one surface of the inner lens 2, and then the light is reflected again by the concave partial reflector 3, and then passes through the inner lens 2 to reach the human eye. The total number of times that the light is reflected back and forth between the inner lens 2 and the concave partial reflector 3 is four.

[0050] As shown in FIG. 14, when the microdisplay 4 is located between the inner lens 2 and the concave partial reflector 3, the microdisplay 4 emits light toward the pupil position 1, and the light beam is reflected four times between the inner lens 2 and the concave partial reflector 3.

[0051] The light emitted by the microdisplay 4 first reaches one surface of the inner lens 2. The one surface of the inner lens 2, that is, the concave surface 2-1 of the inner lens or the convex surface 2-2 of the inner lens, has a certain reflectivity and can reflect light rays. The reflected light passes through the microdisplay 4 and then reaches the concave partial reflector 3 again. The concave partial reflector 3 reflects the light again and passes through the microdisplay 4. Inner lens 2 The light ray is then reflected again by one of the surfaces of the inner lens 2 and then passes again through the microdisplay 4 to be reflected by the concave partial reflector 3, before passing again through the microdisplay 4 and the inner lens 2 to the human eye. The total number of times the light ray is reflected back and forth between the inner lens 2 and the concave partial reflector 3 is four.

[0052] As the light beam travels back and forth and is folded, light energy is lost and there is a certain amount of stray light. To optimize this problem, as shown in FIG. 15(a), the pupil of the human eye is generally larger than 3 mm, and if there is a slit in the center that is smaller than the pupil, some light rays may reach the human eye and form an image. Based on the above principle, the inner lens 2 is strip-shaped to match the pixel arrangement direction of the linear array microdisplay 4a and rotates synchronously with the linear array microdisplay 4a. A strip-shaped central total reflection film 13 is plated in the center of the inner lens 2, and the width of the central total reflection film 13 should be smaller than the pupil diameter of the human eye, and the preferred range is 0.5mm to 1.5mm.

[0053] As shown in FIG. 15(b), on both sides of the central total reflection film 13, one of the surfaces of the inner lens 2, the concave surface 2-1 or the convex surface 2-2, is used as a polarized light reflecting surface, and the polarized light reflecting surface has the property of reflecting one type of polarized light and transmitting polarized light perpendicular to the polarization direction of the reflected light. For example, a metal wire grid polarizing film has the above-mentioned property and can be attached to the surface of the optical lens. Phase Retardation Waveplate An improvement in light energy efficiency is achieved by adding phase retardation waveplate 6. Preferably, phase retardation waveplate 6 is a quarter waveplate.

[0054] FIG. 15(b) is a schematic diagram of polarization change when the linear array microdisplay 4 is located between the inner lens 2 and the concave partial reflector 3. The microdisplay 4 is configured to receive s-linearly polarized light 7- 1, reflected by the strip-shaped central total reflection film 13, the reflected light passes through the phase retardation wave plate 6 without changing its polarization characteristics to become the second circularly polarized light 7-4, and after being reflected by one surface of the concave partial reflecting mirror 3, the circular polarization direction changes to become the first circularly polarized light 7-3, and after passing through the phase retardation wave plate 6 again, it becomes the p linearly polarized light 7-2, and then is all reflected by the polarizing reflective film attached to one surface of the inner lens 2, the reflected light passes through the phase retardation wave plate 6 again without changing its polarization characteristics to become the first circularly polarized light 7-3, and after being reflected by one surface of the concave partial reflecting mirror 3, the circular polarization direction changes to become the second circularly polarized light 7-4, and after passing through the phase retardation wave plate 6 again, it becomes the s linearly polarized light 7-1, and the s linearly polarized light 7-1 can all pass through the polarizing reflective film to reach the pupil position 1. This achieves the display effect of high energy efficiency and low stray light.

[0055] In this embodiment, when the linear array microdisplay 4a is located on the right side of the concave partial reflecting mirror 3, a polarizing film layer is disposed in front of the linear array microdisplay 4a so that the light reaching the position of the central total reflection film 13 becomes s-linearly polarized light. The width of the polarizing film layer should be narrow to prevent many of the light rays reflected by the central total reflection film 13 from passing through, thereby reducing the light energy entering the human eye.

[0056] This embodiment will be described with reference to FIG. 16. FIG. 16(a) shows an assembly diagram of a system in which light rays undergo four reflections in this embodiment when a linear array microdisplay 4a is adopted, and since the linear array microdisplay 4a needs to rotate synchronously with the strip-shaped inner lens 2, an inner protective lens 10 is added to the side close to the human eye, and an outer protective lens 11 is added to the side away from the human eye. FIG. 16(b) shows an xz cross-sectional view of the linear array microdisplay 4a, in which the regions 4a-4 on both sides of the light-emitting pixel can be made into partial reflection surfaces, thereby replacing the function of the concave partial reflection mirror 3. Both the inner protective lens 10 and the outer protective lens 11 may be provided with a rotation axis, thereby improving stability. The rotation axis may be made of a transparent material to avoid occlusion.

[0057] In this embodiment, in order to realize uniformity of clarity of the displayed image, the inner lens 2, the concave partial reflector 3 and the micro display 4 are distributed on a concentric sphere, and the center of the sphere is the center of the pupil position 1. Since the human eye has a zoom adjustment function, a certain degree of movement of the position of each component or deformation of the surface shape is allowed, and the additional function of such movement is that it is possible to adapt to myopia power and realize dynamic zoom. For example, the inner lens 2 The relative distance between the lens and the concave partial reflector 3 can be dynamically adjusted to realize dynamic zooming, and generally, this zooming function can be realized by providing a voice coil motor.

[0058] The table below shows the optical design parameters when the micro display 4 is located between the inner lens 2 and the concave partial reflector 3 and the number of reflections is four. The parameters are shown for only one reflection because the position and shape of the device do not change during the process of folding from the virtual image position.

[0059] [Table 3]

[0060] The table below shows the optical design parameters when the microdisplay 4 is located to the right of the concave partial reflector 3 and the number of reflections is four. The parameters are shown for only one reflection because the position and shape of the device do not change during the process of folding from the virtual image position.

[0061] [Table 4]

[0062] If one surface of the inner lens 2 is involved in generating the virtual image, the curvature of the other surface may be varied as a myopia correcting surface to suit the user's power. The two surfaces of the concave partially reflecting mirror 3 can be similarly treated to adjust the power.

[0063] In order to improve the energy utilization rate, one surface of the concave partial reflector 3 may be plated with a reflective filter film, and the film layer is designed according to the emission wavelength of the microdisplay 4. The reflective filter film has a high reflectance for the central wavelength of the emission of the microdisplay 4, for example, reflects more than 90%, while it has a high transmittance for wavelength ranges other than the central wavelength of the emission, for example, transmits more than 90%. Such a design can simultaneously improve the brightness of the ambient light and the virtual image. The reflective filter film may be a dielectric film layer, a dielectric metal composite film layer, a holographic film layer, and a microstructure film layer.

[0064] This embodiment will be described with reference to Figures 17 to 20. As shown in Figure 17, light emitted by the microdisplay 4 travels back and forth between the concave partial reflecting mirror 3 and the inner lens 2, is reflected at least five times, passes through the inner lens 2, and reaches the human eye. When the microdisplay 4 is provided between the inner lens 2 and the pupil position 1, the microdisplay 4 emits light facing away from the pupil position, and the number of reflections of the light emitted by the microdisplay 4 between the inner lens 2 and the concave partial reflecting mirror 3 is an odd number ≧5, for example, 7, 9, or 11.

[0065] When the microdisplay 4 is provided between the inner lens 2 and the concave partial reflector 3, the microdisplay 4 may emit light facing away from the pupil position 1 or may emit light toward the pupil position 1. When emitting light facing away from the pupil position 1, the number of reflections of the light emitted by the microdisplay 4 between the inner lens 2 and the concave partial reflector 3 is an odd number of ≧5, for example, 7, 9, or 11, and when emitting light toward the pupil position 1, the number of reflections of the light emitted by the microdisplay 4 between the inner lens 2 and the concave partial reflector 3 is an even number of ≧6, for example, 6, 8, or 10.

[0066] When the microdisplay 4 is located to the right of the concave partial reflector 3, the microdisplay 4 emits light toward the pupil position 1, and the number of reflections of the light emitted by the microdisplay 4 between the inner lens 2 and the concave partial reflector 3 is an even number ≧6, for example 6, 8, or 10.

[0067] One surface of the inner lens 2 is a switchable mirror, and the micro display 4 is controlled to emit pulsed light. If the number of reflections does not reach a predetermined number (e.g., 8 times), the switchable mirror reflects the light, and if the number of reflections reaches the predetermined number, the switchable mirror becomes transparent and transmits the light to enter the human eye. This optical aspect can further reduce the thickness.

[0068] In this embodiment, when the number of times that the light ray is reflected between the inner lens 2 and the concave partial reflecting mirror 3 is greater than four, one surface of the inner lens 2 is made a polarized reflecting surface, a phase delay wave plate 6 is added between the inner lens 2 and the concave partial reflecting mirror 3, the partial reflecting surface of the concave partial reflecting mirror 3 is made a surface whose reflected circular polarization direction can be dynamically adjusted, and the microdisplay 4 is controlled to emit pulsed circularly polarized light, and the concave partial reflecting mirror 3 is configured to maintain a state in which the reflected circular polarization direction does not change, and when the number of times that the light ray is reflected reaches a predetermined number, the partial reflecting surface of the concave partial reflecting mirror 3 changes into an ordinary mirror surface, and after being reflected by the ordinary mirror surface, it enters the human eye.

[0069] As shown in Figure 18, the optical path and polarization change diagram when the partial reflection surface of the concave partial reflector 3 is set so that the reflected circular polarization direction can be dynamically adjusted, and the function of dynamically adjusting the reflected circular polarization direction can be realized by the super surface technology at present. The micro display 4 emits a first circularly polarized light 7-3 of a short pulse, and at this time, the concave partial reflector 3 is set so that the reflected circular polarization direction remains unchanged, and the light ray passes through the phase retardation wave plate 6 after reflection, and becomes p linearly polarized light 7-2, and is totally reflected by the polarized reflection film on the inner lens 2, and after passing through the phase retardation wave plate 6, it still becomes the first circularly polarized light 7-3, and after going back and forth in this way for a certain number of times, for example, 8 times, the partial reflection surface of the concave partial reflector 3 turns into a normal mirror surface, and after reflection, the circular polarization direction is reversed and becomes the second circularly polarized light 7-4, and finally, after passing through the phase retardation wave plate 6, it becomes s linearly polarized light, and passes through the inner lens 2 to enter the human eye.

[0070] The table below shows the optical design parameters for the multiple reflection system shown in Figure 17. The parameters in the table correspond to the case where the microdisplay 4 is located between the inner lens 2 and the concave partially reflecting mirror 3. The parameters are shown only once because the position and shape of the device do not change during the folding process from the virtual image position.

[0071] [Table 5]

[0072] This embodiment will be described with reference to Figures 19 and 20. When the number of folding times is increased, the distance between the inner lens 2 and the concave partial reflector 3 is considerably small, so they can be merged into an integrated lens 14, and the micro display 4 can be located on the left or right side of the integrated lens 14. After the light beam travels back and forth between the inner surface 14-1 of the integrated lens and the outer surface 14-2 of the integrated lens and is reflected a certain number of times, for example, eight times, it passes through the inner surface 14-1 of the integrated lens and enters the human eye.

[0073] In this embodiment, in order to realize uniformity of clarity of the displayed image, the integrated lens 14 and the micro display 4 are distributed on a concentric sphere, and the center of the sphere is the center of the pupil position 1. Since the human eye has a zoom adjustment function, a certain degree of movement of the position of each component or deformation of the surface shape is allowed, and the additional function of such movement is that it is possible to adapt to myopia and realize dynamic zoom. Generally, this zoom function can be realized by installing a voice coil motor.

[0074] The table below shows the optical design parameters for the system shown in Figure 19. Note that the data in the table indicates that the microdisplay 4 is located to the left of the integrated lens 14. The parameters are shown only once, since the position and shape of the device do not change during the folding process from the virtual image position.

[0075] [Table 6]

[0076] In order to improve the energy utilization rate and reduce the stray light after multiple folding, firstly, the inner surface 14-1 of the integrated lens can be a switchable mirror, which can be electronically controlled to transmit or reflect. When the micro display 4 emits pulsed light and the number of reflections is not reached to a predetermined number, the switchable reflector can reflect the light, and when the number of reflections reaches to a predetermined number, the switchable reflector is in a transmittance state and transmits the light to enter the human eye. This achieves the effect of high efficiency and low stray light.

[0077] In this application, the terms "including" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a system, product or facility that includes a set of units is not limited to those explicitly recited, but may include other units that are not explicitly recited or that are inherent to those products or facilities.

[0078] The technical features of the above-mentioned embodiments can be combined in any combination. For the sake of brevity, a description has not been given of all possible combinations of the technical features in the above-mentioned embodiments, but as long as there is no contradiction in the combinations of these technical features, they should all be considered within the scope of the present specification.

[0079] The above examples only represent some embodiments of the present application, and the description is relatively specific and detailed, but this should not be understood as a limitation on the scope of the claims. Furthermore, those skilled in the art may make some modifications and improvements without departing from the concept of the present application, all of which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application is based on the appended claims. [Explanation of symbols]

[0080] 1 pupil position, 2 inner lens, 2-1 concave surface, 2-2 convex surface, 2-3 inner lens extension, 2-4 rotation axis, 3 concave partial reflector, 3-1 inner surface, 3-2 outer surface, 3a strip-shaped partial reflector, 4 microdisplay, 4a linear array microdisplay, 4b transparent microdisplay, 4a-1 linear array microdisplay light-emitting pixel, 4a-2 transparent conductor, 4a-3 linear array display driver chip, 4a-4 light-emitting pixel side area, 4a-5 light-emitting pixel front layer, 4a-6 linear array microdisplay extension, 4a-7 magnetic ring in linear array microdisplay, 4a-8 rotating concave ring, 5 ambient light, 5-1 natural ambient light, 5-2 s-type linearly polarized ambient light, 5-3 first circularly polarized ambient light, 6 phase retardation waveplate, 7 light beam, 7-1 s-linearly polarized light, 7-2 p-linearly polarized light, 7-3 First circular polarizer, 7-4 Second circular polarizer, 7-5 Unlimited polarizer, 8 Constrained magnetic ring, 9 Supplementary function plate, 10 Inner protective lens, 10-1 Inner protective lens rotation axis, 10-2 Inner protective lens extension end, 11 Outer protective lens, 11-1 Outer protective lens rotation axis, 12 Mirror frame, 13 Central total reflection film, 14 Integrated lens, 14-1 Inner surface of integrated lens, 14-2 Outer surface of integrated lens, 15 Ambient light circular polarizer.

Claims

1. 1. A portable short focus near-eye viewing system, comprising: The device includes a microdisplay (4), an inner lens (2), and a concave partially reflecting mirror (3), The inner lens (2) is a convex reflector located close to the pupil position (1), The concave partially reflecting mirror (3) is positioned away from the pupil position (1), the microdisplay (4) is a rotating linear array microdisplay (4a) or a transparent microdisplay (4b) and is provided between the inner lens (2) and the pupil position (1), or between the inner lens (2) and the concave partial reflector (3), or on the convex side of the concave partial reflector (3); When the microdisplay (4) is disposed between the inner lens (2) and the pupil position (1), the microdisplay (4) emits light facing away from the pupil position (1), and the number of reflections of the light emitted by the microdisplay (4) between the inner lens (2) and the concave partial reflector (3) is ≧3; When the microdisplay (4) is disposed between the inner lens (2) and the concave partial reflector (3), the microdisplay (4) emits light away from the pupil position (1) or toward the pupil position (1), and the number of reflections of the light emitted by the microdisplay (4) between the inner lens (2) and the concave partial reflector (3) is ≧3; When the microdisplay (4) is provided on the convex side of the concave partial reflector (3), the microdisplay (4) emits light toward the pupil position (1), and the number of reflections of the light emitted by the microdisplay (4) between the inner lens (2) and the concave partial reflector (3) is ≧4; When the number of reflections of the light emitted by the microdisplay (4) between the inner lens (2) and the concave partial reflector (3) is greater than four, one surface of the inner lens (2) is a polarized reflecting surface, a phase retardation wave plate (6) is added between the inner lens (2) and the concave partial reflector (3), the partially reflecting surface of the concave partial reflector (3) is a surface whose reflected circular polarization direction can be dynamically adjusted, and the microdisplay (4) is controlled to emit pulsed circularly polarized light, and the concave partial reflector (3) is configured to maintain the reflected circular polarization direction unchanged. When the number of light reflections reaches a predetermined number, the partially reflecting surface of the concave partial reflector (3) is made into an ordinary mirror surface, and the light enters the human eye after being reflected by the ordinary mirror surface. This lightweight short focus near-eye display system is characterized in that:

2. A lightweight short focus near-eye display system, comprising: The device includes a microdisplay (4), an inner lens (2), and a concave partially reflecting mirror (3), The inner lens (2) is a convex reflector located close to the pupil position (1), The concave partially reflecting mirror (3) is positioned away from the pupil position (1), the microdisplay (4) is a rotating linear array microdisplay (4a) or a transparent microdisplay (4b) and is provided between the inner lens (2) and the pupil position (1), or between the inner lens (2) and the concave partial reflector (3), or on the convex side of the concave partial reflector (3); When the microdisplay (4) is disposed between the inner lens (2) and the pupil position (1), the microdisplay (4) emits light facing away from the pupil position (1), and the number of reflections of the light emitted by the microdisplay (4) between the inner lens (2) and the concave partial reflector (3) is ≧3; When the microdisplay (4) is disposed between the inner lens (2) and the concave partial reflector (3), the microdisplay (4) emits light away from the pupil position (1) or toward the pupil position (1), and the number of reflections of the light emitted by the microdisplay (4) between the inner lens (2) and the concave partial reflector (3) is ≧3; When the microdisplay (4) is provided on the convex side of the concave partial reflector (3), the microdisplay (4) emits light toward the pupil position (1), and the number of reflections of the light emitted by the microdisplay (4) between the inner lens (2) and the concave partial reflector (3) is ≧4; When the number of reflections of the light emitted by the micro display (4) between the inner lens (2) and the concave partial reflector (3) is greater than four, one surface of the inner lens (2) is made a switchable mirror, and the micro display (4) is controlled to emit pulsed light; The switchable mirror reflects the light when the number of reflections has not reached a predetermined number, and when the number of reflections has reached a predetermined number, the switchable mirror becomes transparent and transmits the light to enter the human eye.

3. The concave surface (2-1) or the convex surface (2-2) of the inner lens (2) is a polarized reflective surface, a phase retardation wave plate (6) is added between the inner lens (2) and the concave partial reflector (3), and an ambient light circular polarizer (15) is disposed on the convex surface (2-2) side of the concave partial reflector (3), The ambient light circular polarizer (15) is used to convert natural ambient light (5-1) into a first circularly polarized ambient light (5-3); The lightweight short focus near-eye display system according to claim 1 or claim 2, characterized in that the first circularly polarized ambient light (5-3) passes through a phase retardation wave plate (6) and then becomes S-type linearly polarized ambient light (5-2) and enters the human eye.

4. The number of reflections of light emitted by the microdisplay (4) between the inner lens (2) and the concave partial reflector (3) is three, the concave surface (2-1) or the convex surface (2-2) of the inner lens (2) is a polarized reflecting surface, and when the microdisplay (4) is located between the inner lens (2) and the concave partial reflector (3), a phase retardation wave plate (6) is disposed between the microdisplay (4) and the inner lens (2); 3. The portable short focus near-eye display system of claim 1 or 2, characterized in that when the microdisplay (4) is provided between the inner lens (2) and the pupil position (1), a phase retardation wave plate (6) is arranged between the inner lens (2) and the concave partial reflector (3).

5. The linear array microdisplay (4a) includes a light-emitting pixel (4a-1), a transparent conductive line (4a-2), and a display driver chip (4a-3); The transparent conductive wire (4a-2) connects the light-emitting pixel (4a-1) and the display driver chip (4a-3); The distance between the light-emitting pixel (4a-1) and the display driver chip (4a-3) is greater than 1 mm; The arrangement of the light-emitting pixels (4a-1) is one, one-half, two arranged in a cross shape, or four arranged in a U-shape, The light-emitting pixel has both side regions (4a-4) which are transparent regions, partially reflective surfaces or polarized reflective surfaces, and when the both side regions (4a-4) are the partially reflective surfaces, they are replaced by the concave partially reflective mirror (3), and when the both side regions (4a-4) are the polarized reflective surfaces, they are replaced by the inner lens (2).

6. The lightweight short focus near-eye display system of claim 5, characterized in that the light emitted by the microdisplay (4) is reflected three times between the inner lens (2) and the concave partial reflector (3), the concave partial reflector (3) is a strip-shaped partial reflector (3a), the strip-shaped partial reflector (3a) rotates synchronously with the linear array microdisplay (4a), and an outer protective lens (11) is arranged on one side of the strip-shaped partial reflector (3a).

7. The number of times that the light emitted by the microdisplay (4) is reflected between the inner lens (2) and the concave partial reflector (3) is four, the concave surface (2-1) or the convex surface (2-2) of the inner lens (2) is a polarized reflecting surface, the inner lens (2) is in a strip shape that coincides with the pixel arrangement direction of the linear array microdisplay (4a), and the concave partial reflector (3) is a strip-shaped partial reflector (3a), The inner lens (2), the strip-shaped partial reflector (3a) and the linear array microdisplay (4a) rotate synchronously; A strip-shaped central total reflection film (13) is plated at the center of the inner lens (2); The width of the central total reflection film (13) is smaller than the pupil diameter of the human eye, The portable short focus near-eye display system of claim 5, characterized in that a phase retardation wave plate (6) is arranged between the inner lens (2) and the strip-shaped partial reflector (3a), and a polarizing film layer is arranged in front of the light-emitting pixels of the linear array microdisplay (4a).

8. In place of the strip-shaped partial reflecting mirror (3a), the both side regions (4a-4) of the light-emitting pixel of the linear array microdisplay (4a) are used as the partial reflecting surfaces, The linear array microdisplay (4a) rotates synchronously with the inner lens (2); An inner protective lens (10) is added to the left of the inner lens (2) and an outer protective lens (11) is added to the side away from the pupil of the linear array microdisplay (4a); 8. The portable short focus near-eye display system as claimed in claim 7, wherein both the inner protective lens (10) and the outer protective lens (11) are provided with a rotation axis.

9. The inner lens (2) and the concave partial reflector (3) are merged into an integral lens (14), The micro display (4) is arranged to emit light toward one side of the integrated lens (14), and an inner surface (14-1) of the integrated lens is a switchable mirror; The lightweight short focus near-eye display system according to claim 2, characterized in that the light emitted by the micro display (4) is reflected between the inner surface (14-1) of the integrated lens and the outer surface (14-2) of the integrated lens, and when the number of reflections reaches a predetermined number, the light passes through the inner surface (14-1) of the integrated lens and enters the human eye.

Images