Near-to-eye display device, optical system and electronic equipment

Abstract

The invention relates to a near-to-eye display device, an optical system and electronic equipment, the near-to-eye display device comprises a first optical lens and a second optical lens which are superposed, the first optical lens is provided with a first outer surface and a first inner surface, the second optical lens is provided with a second outer surface and a second inner surface, the first outer surface is a surface close to the environment side, the second outer surface is a surface close to the human eye side, at least part of the first outer surface is a curved surface, at least part of the second outer surface is a curved surface, and the first inner surface and the second inner surface are both planes. A coupling-in grating is arranged on one surface of at least one of the first optical lens and the second optical lens, the area where the coupling-in grating is located is a plane, and a coupling-out grating is arranged on at least one of the first inner surface and the second inner surface.

Description

Technical Field

[0001] The present disclosure relates to optical display technology, and more specifically, to a near-eye display device, an optical system, and an electronic device. Background Art

[0002] Augmented reality technology and mixed reality technology are widely used in many industries by combining virtual information with the real world. In the corresponding electronic devices, optical waveguides are regarded as one of the best optical display devices due to their good optical effects and low process difficulty. The current technical solutions are to set coupling gratings and coupling gratings on the optical waveguide, which requires the configuration of corresponding optical waveguides, which is costly. Summary of the invention

[0003] An object of the present invention is to provide a new technical solution for a near-eye display device.

[0004] According to a first aspect of the present invention, there is provided a near-eye display device, comprising: a first optical lens and a second optical lens arranged in a stacked manner,

[0005] The first optical lens has a first outer surface and a first inner surface, and the second optical lens has a second outer surface and a second inner surface, wherein the first outer surface is a surface close to the environment, and the second outer surface is a surface close to the human eye.

[0006] At least a portion of the first outer surface is a curved surface, at least a portion of the second outer surface is a curved surface, and both the first inner surface and the second inner surface are flat surfaces.

[0007] A coupling-in grating is arranged on a surface of at least one of the first optical lens and the second optical lens, and the region where the coupling-in grating is located is a plane, and a coupling-out grating is arranged on at least one of the first inner surface and the second inner surface.

[0008] Optionally, in the case where the first outer surface is provided with an incoupling grating, the first outer surface has a first plane and a first curved surface, and the incoupling grating provided on the first outer surface is provided on the first plane;

[0009] In the case where the second outer surface is provided with a coupling-in grating, the second outer surface has a second plane and a second curved surface, and the coupling-in grating provided on the second outer surface is provided on the second plane.

[0010] Optionally, in the case where the first optical lens is provided with an in-coupling grating and an out-coupling grating, the in-coupling grating and the out-coupling grating provided on the first optical lens are located on the same surface, or the in-coupling grating and the out-coupling grating provided on the first optical lens are located on different surfaces;

[0011] In the case where the second optical lens is provided with an in-coupling grating and an out-coupling grating, the in-coupling grating and the out-coupling grating provided on the second optical lens are located on the same surface, or the in-coupling grating and the out-coupling grating provided on the second optical lens are located on different surfaces.

[0012] Optionally, the direction of the light emitted by the optical machine is the first direction or the second direction, and the light emitted by the optical machine cannot pass through the curved surface before entering the coupling grating, wherein,

[0013] The first direction is a direction from the environment side to the human eye side, and the second direction is a direction from the human eye side to the environment side.

[0014] Optionally, when both the first optical lens and the second optical lens are provided with coupling-in gratings, an area corresponding to the coupling-in grating provided on the first optical lens and an area corresponding to the coupling-in grating provided on the second optical lens partially overlap or completely overlap;

[0015] In the case where both the first inner surface and the second inner surface are provided with outcoupling gratings, the area corresponding to the outcoupling grating provided on the first inner surface and the area corresponding to the outcoupling grating provided on the second inner surface are partially overlapped or completely overlapped.

[0016] Optionally, the coupling-in grating is a one-dimensional grating, and the coupling-out grating is a one-dimensional grating; or,

[0017] The coupling-in grating is a one-dimensional grating, and the coupling-out grating is a two-dimensional grating; or,

[0018] The coupling-in grating is a one-dimensional grating, and the coupling-out grating is a mixed one-dimensional grating and a two-dimensional grating.

[0019] Optionally, the inner surface on which the outcoupling grating is provided is also provided with a turning grating.

[0020] Optionally, the optical power of the first optical lens and the optical power of the second optical lens have opposite signs.

[0021] According to a second aspect of the present invention, an optical system is provided, comprising: a near-eye display device as described in any one of the first aspects and an optical machine, wherein the optical machine is used to project light onto the coupling-in grating.

[0022] According to a third aspect of the present invention, there is provided an electronic device comprising the optical system as described in the second aspect.

[0023] In the near-eye display device provided by the embodiment of the present invention, on the one hand, the combination of the first optical lens and the second optical lens can realize the functions of vision correction and correction of virtual image distance. On the other hand, the coupling-in grating and the coupling-out grating are arranged on the first optical lens and / or the second optical lens, and the light diffracted by the coupling-in grating is reflected and propagated in the first optical lens and / or the second optical lens, and then diffracted out by the coupling-out grating. In this way, the first optical lens and / or the second optical lens realizes the function of light reflection of the optical waveguide substrate, and there is no need to set a separate optical waveguide substrate, which saves product cost and reduces product weight.

[0024] In addition, when the first optical lens is provided with a coupling-in grating and a coupling-out grating, and the second optical lens is provided with a coupling-in grating and a coupling-out grating, the light can enter the first optical lens through the diffraction of the coupling-in grating provided on the first optical lens, be reflected and propagated, and then be diffracted out through the coupling-out grating to enter the user's eyes. The light can also enter the second optical lens through the diffraction of the coupling-in grating provided on the second optical lens, be reflected and propagated, and then be diffracted out through the coupling-out grating to enter the user's eyes. This can improve the optical efficiency, reduce the optical loss, and enhance the color uniformity and brightness uniformity of the displayed image, which is equivalent to the display effect achieved by superimposing two diffraction optical waveguides.

[0025] Features and advantages of the embodiments of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the embodiments of the specification.

[0027] Figure 1 is a schematic exploded view of a near-eye display device according to an embodiment of the present invention.

[0028] Figure 2 Schematic diagram of an in-coupling grating and an out-coupling grating according to an embodiment of the present invention.

[0029] Figure 3 Schematic diagram of an in-coupling grating and an out-coupling grating according to an embodiment of the present invention.

[0030] Figure 4 Schematic diagram of an in-coupling grating and an out-coupling grating according to an embodiment of the present invention.

[0031] Figure 5 is a schematic exploded view of a near-eye display device according to an embodiment of the present invention.

[0032] Figure 6is a schematic exploded view of a near-eye display device according to an embodiment of the present invention.

[0033] Figure 7 is a schematic exploded view of a near-eye display device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present specification will now be described in detail with reference to the accompanying drawings.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the embodiments of the present specification and its application or uses.

[0036] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] One embodiment of the present invention provides a near-eye display device. Figure 1 As shown, the near-eye display device includes: a first optical lens 110 and a second optical lens 120 which are stacked.

[0038] The first optical lens 110 has a first outer surface 111 and a first inner surface 112. The second optical lens 120 has a second outer surface 121 and a second inner surface 122. The first outer surface 111 is a surface close to the environment, and the second outer surface 112 is a surface close to the human eye.

[0039] At least part of the first outer surface 111 is a curved surface. At least part of the second outer surface 121 is a curved surface. The first inner surface 112 and the second inner surface 122 are both planes. That is, the first outer surface 111 is entirely a curved surface, or the first outer surface 111 is partially a curved surface and partially a plane. The second outer surface 121 is entirely a curved surface, or the second outer surface 121 is partially a curved surface and partially a plane.

[0040] A coupling-in grating ( Figure 1 The coupling grating is not shown), and the area where the coupling grating is set is a plane. At least one of the first inner surface 112 and the second inner surface 122 is provided with a coupling grating ( Figure 1 (not shown). Both the in-coupling grating and the out-coupling grating are arranged on a plane, which is determined by the arrangement requirements of the out-coupling grating itself.

[0041] In the case where the first optical lens is provided with a coupling-in grating, the refractive index of the first optical lens meets the preset requirements, so that the light entering through the diffraction of the coupling-in grating can be totally reflected and propagated in the first optical lens. In the case where the second optical lens is provided with a coupling-in grating, the refractive index of the second optical lens meets the preset requirements, so that the light entering through the diffraction of the coupling-in grating can be totally reflected and propagated in the second optical lens.

[0042] The first optical lens and the second optical lens are superimposed on each other, and by adjusting the focal lengths and relative positions of the two lenses, combined with the coupling-in grating and the coupling-out grating, precise propagation of light can be achieved, so that the light forms a clear image.

[0043] In the near-eye display device provided by the embodiment of the present invention, on the one hand, the combination of the first optical lens and the second optical lens can realize the functions of vision correction and correction of virtual image distance. On the other hand, the coupling-in grating and the coupling-out grating are arranged on the first optical lens and / or the second optical lens, and the light diffracted by the coupling-in grating is reflected and propagated in the first optical lens and / or the second optical lens, and then diffracted out by the coupling-out grating. In this way, the first optical lens and / or the second optical lens realizes the function of light reflection of the optical waveguide substrate, and there is no need to set a separate optical waveguide substrate, which saves product cost and reduces product weight.

[0044] In addition, when the first optical lens is provided with a coupling-in grating and a coupling-out grating, and the second optical lens is provided with a coupling-in grating and a coupling-out grating, the light can enter the first optical lens through the diffraction of the coupling-in grating provided on the first optical lens, be reflected and propagated, and then be diffracted out through the coupling-out grating to enter the user's eyes. The light can also enter the second optical lens through the diffraction of the coupling-in grating provided on the second optical lens, be reflected and propagated, and then be diffracted out through the coupling-out grating to enter the user's eyes. This can improve the optical efficiency, reduce the optical loss, and enhance the color uniformity and brightness uniformity of the displayed image, which is equivalent to the display effect achieved by superimposing two diffraction optical waveguides.

[0045] In some embodiments, when the first optical lens is provided with a coupling-in grating, the coupling-in grating is provided on the first outer surface, or the coupling-in grating is provided on the first inner surface. When the first optical lens is provided with a coupling-in grating and a coupling-out grating, light can be diffracted by the coupling-in grating provided on the first optical lens and enter the first optical lens, be reflected and propagated, and then be diffracted out by the coupling-out grating and enter the user's eyes, so that the first optical lens realizes the function of light reflection of the optical waveguide substrate. In addition, the setting position of the coupling-in grating is flexible, so that the setting of the coupling-in grating can match more optical and structural layouts. When the first outer surface is provided with a coupling-in grating, the first outer surface has a first plane and a first curved surface, and the coupling-in grating provided on the first outer surface is provided on the first plane. This is determined by the setting requirements of the coupling-in grating itself.

[0046] In some embodiments, when the second optical lens is provided with a coupling-in grating, the coupling-in grating is provided on the second outer surface, or the coupling-in grating is provided on the second inner surface. When the second optical lens is provided with a coupling-in grating and a coupling-out grating, light can be diffracted by the coupling-in grating provided on the second optical lens and enter the second optical lens, be reflected and propagated, and then be diffracted out by the coupling-out grating and enter the user's eyes, so that the second optical lens realizes the function of light reflection of the optical waveguide substrate. In addition, the setting position of the coupling-in grating is flexible, so that the setting of the coupling-in grating can match more optical and structural layouts. When the second outer surface is provided with a coupling-in grating, the second outer surface has a second plane and a second curved surface, and the coupling-in grating provided on the second outer surface is provided on the second plane. This is determined by the setting requirements of the coupling-in grating itself.

[0047] In some embodiments, when the first optical lens is provided with an in-coupling grating and an out-coupling grating, the in-coupling grating and the out-coupling grating provided on the first optical lens are located on the same surface, that is, both are provided on the first inner surface. Alternatively, the in-coupling grating and the out-coupling grating provided on the first optical lens are located on different surfaces, that is, the in-coupling grating is provided on the first outer surface, and the out-coupling grating is provided on the first inner surface. When the in-coupling grating is provided on the first outer surface, the first outer surface has a first plane and a first curved surface, and the in-coupling grating provided on the first outer surface is provided on the first plane.

[0048] In some embodiments, when the second optical lens is provided with an in-coupling grating and an out-coupling grating, the in-coupling grating and the out-coupling grating provided on the second optical lens are located on the same surface, that is, both are provided on the second inner surface. Alternatively, the in-coupling grating and the out-coupling grating provided on the second optical lens are located on different surfaces, that is, the in-coupling grating is provided on the second outer surface, and the out-coupling grating is provided on the second inner surface. When the in-coupling grating is provided on the second outer surface, the second outer surface has a second plane and a second curved surface, and the in-coupling grating provided on the second outer surface is provided on the second plane.

[0049] In some embodiments, the direction of the light emitted by the optical machine is a first direction or a second direction, and the light emitted by the optical machine cannot pass through the curved surface before entering the coupling grating. The first direction is the direction from the environment side to the human eye side, and the second direction is the direction from the human eye side to the environment side.

[0050] It should be noted that the direction of the light emitted by the optical machine is matched with the setting position of the coupling-in grating to ensure that the light emitted by the optical machine cannot pass through the curved surface before entering the coupling-in grating.

[0051] For example, the direction of the light emitted by the optical machine is the first direction, and the first outer surface has a first plane and a first curved surface. If no coupling grating is set on the first plane, all the light emitted by the optical machine passes through the first plane to ensure that the light emitted by the optical machine cannot pass through the curved surface before entering the coupling grating. If a coupling grating is set on the first plane, the light emitted by the optical machine enters the coupling grating for diffraction.

[0052] For another example, the direction of the light emitted by the optical machine is the second direction, and the second outer surface has a second plane and a second curved surface. If no coupling grating is set on the second plane, all the light emitted by the optical machine passes through the second plane to ensure that the light emitted by the optical machine cannot pass through the curved surface before entering the coupling grating. If a coupling grating is set on the second plane, the light emitted by the optical machine enters the coupling grating for diffraction.

[0053] In some embodiments, when both the first optical lens and the second optical lens are provided with an in-coupling grating, the area corresponding to the in-coupling grating provided on the first optical lens and the area corresponding to the in-coupling grating provided on the second optical lens are partially overlapped or completely overlapped. When both the first inner surface and the second inner surface are provided with an out-coupling grating, the area corresponding to the out-coupling grating provided on the first inner surface and the area corresponding to the out-coupling grating provided on the second inner surface are partially overlapped or completely overlapped. The overlap mentioned here refers to the overlap generated along the superposition direction of the first optical lens and the second optical lens.

[0054] The area corresponding to the coupling-in grating arranged on the first optical lens and the area corresponding to the coupling-in grating arranged on the second optical lens are partially overlapped or completely overlapped, and the area corresponding to the coupling-out grating arranged on the first inner surface and the area corresponding to the coupling-out grating arranged on the second inner surface are partially overlapped or completely overlapped, which can improve the optical efficiency and enhance the color uniformity and brightness uniformity of the displayed image.

[0055] In some embodiments, the in-coupling grating is a one-dimensional grating, and the out-coupling grating is a one-dimensional grating.

[0056] In some embodiments, the in-coupling grating is a one-dimensional grating and the out-coupling grating is a two-dimensional grating.

[0057] In some embodiments, the coupling-in grating is a one-dimensional grating, and the coupling-out grating is a hybrid of a one-dimensional grating and a two-dimensional grating.

[0058] One-dimensional gratings couple and diffract light in a specific direction, which can effectively control the propagation direction of light. Two-dimensional gratings can process light in two directions, improve coupling efficiency, and allow more light to be coupled out in the desired direction and angle, thereby achieving efficient two-dimensional diffraction.

[0059] Figure 2 FIG. 1 is a schematic diagram of an in-coupling grating and an out-coupling grating according to an embodiment of the present invention. Figure 2 As shown, the coupling-in grating is a one-dimensional grating, and the coupling-out grating is a two-dimensional grating.

[0060] Figure 3 FIG. 1 is a schematic diagram of an in-coupling grating and an out-coupling grating according to an embodiment of the present invention. Figure 3 As shown, the coupling-in grating is a one-dimensional grating, and the coupling-out grating is a mixture of a one-dimensional grating and a two-dimensional grating.

[0061] In some embodiments, the inner surface provided with the outcoupling grating is also provided with a turning grating. The light first passes through the turning grating for turning, and then passes through the outcoupling grating for outcoupling, so as to achieve specific turning and efficient outcoupling of the light.

[0062] Figure 4 FIG. 1 is a schematic diagram of an in-coupling grating and an out-coupling grating according to an embodiment of the present invention. Figure 4 As shown, the coupling-in grating is a one-dimensional grating, the turning grating is a one-dimensional grating, and the coupling-out grating is a one-dimensional grating.

[0063] In some embodiments, the optical power of the first optical lens and the optical power of the second optical lens have opposite signs. That is, the optical power of the first optical lens is positive, and the optical power of the second optical lens is negative, or the optical power of the first optical lens is negative, and the optical power of the second optical lens is positive. An optical lens with a positive optical power can converge light, and an optical lens with a negative optical power can diverge light. When the first optical lens and the second optical lens are superimposed, the precise propagation of light can be achieved by adjusting the focal length and relative position of the two, and some aberrations can be offset to improve imaging quality. In addition, an optical lens with a negative optical power can diverge light, which helps to expand the field of view, so that light in a wider range can be captured.

[0064] In some embodiments, the curved surface of the first optical lens and the second optical lens may be any of the following surface types: a spherical surface, a cylindrical surface, a cylindrical surface superimposed on a spherical surface, and a free-form surface.

[0065] In some embodiments, the first optical lens and the second optical lens are fixed by any of the following methods: optical adhesive bonding, frame bonding, and fasteners.

[0066] The near-eye display device provided by the present invention is described below with reference to a number of specific embodiments.

[0067] In one embodiment, according to Figure 5 As shown, the near-eye display device includes: a first optical lens 110 and a second optical lens 120 which are stacked. The first optical lens 110 is a convex lens, and the second optical lens 120 is a concave lens.

[0068] The first optical lens 110 has a first outer surface 111 and a first inner surface 112. The second optical lens 120 has a second outer surface 121 and a second inner surface 122. The first outer surface 111 is a surface close to the environment. The second outer surface 121 is a surface close to the human eye. The first outer surface 111 has a first plane 111a and a first curved surface 111b. The second outer surface 121 has a second plane 121a and a second curved surface 121b. The first inner surface 112 and the second inner surface 122 are both planes.

[0069] The first plane 111a and the second inner surface 122 are both provided with an in-coupling grating 130. The first inner surface 112 and the second inner surface 122 are both provided with an out-coupling grating 140.

[0070] based on Figure 5 In the near-eye display device shown, the direction of the light emitted by the optical machine can be a first direction or a second direction. The first direction is the direction from the environment side to the human eye side, and the second direction is the direction from the human eye side to the environment side.

[0071] based on Figure 5For the first optical lens 110 and the second optical lens 120 shown, the number of the coupling-in grating 130 can be one, for example, it can be set on any plane among the first plane 111a, the second plane 121a, the first inner surface 112 and the second inner surface 122. The number of the coupling-in grating 130 can be two, for example, one can be set on any plane among the first plane 111a and the first inner surface 112, and the other can be set on any plane among the second plane 121a and the second inner surface 122. The number of the coupling-out grating 140 can be one, for example, it can be set on any plane among the first inner surface 112 and the second inner surface 122. The number of the coupling-out grating 140 can be two, for example, it can be set on the first inner surface 112 and the second inner surface 122. The specific settings of the coupling-in grating and the coupling-out grating can be arbitrarily combined according to the setting numbers and setting positions listed above. It should be noted that, based on the above combination, Figure 5 The arrangement of the coupling-in grating and the coupling-out grating shown is a preferred embodiment. The combination of the first optical lens and the second optical lens can not only achieve vision correction, but is also equivalent to the superposition of two diffraction waveguides to improve optical efficiency, reduce optical losses, and enhance the display effect of color uniformity and brightness uniformity of the displayed image.

[0072] In one embodiment, according to Figure 6 As shown, the near-eye display device includes: a first optical lens 610 and a second optical lens 620 which are superimposed. The first optical lens 610 is a convex lens, and the second optical lens 620 is a concave lens.

[0073] The first optical lens 610 has a first outer surface 611 and a first inner surface 612. The second optical lens 620 has a second outer surface 621 and a second inner surface 622. The first outer surface 611 is a surface close to the environment. The second outer surface 621 is a surface close to the human eye. The first outer surface 611 is entirely curved. The second outer surface 621 has a second plane 621a and a second curved surface 621b. The first inner surface 612 and the second inner surface 622 are both planes.

[0074] The first inner surface 612 and the second inner surface 622 are both provided with an in-coupling grating 630. The first inner surface 612 and the second inner surface 622 are both provided with an out-coupling grating 640.

[0075] based on Figure 6 In the near-eye display device shown, the direction of the light emitted by the optical machine can only be the second direction. The second direction is the direction from the human eye side to the environment side.

[0076] based on Figure 6The first optical lens 610 and the second optical lens 620 shown in the figure, the number of the coupling-in grating 630 can be one, for example, it is set on any plane among the second plane 621a, the first inner surface 612 and the second inner surface 622. The number of the coupling-in grating 630 can be two, for example, one is set on the first inner surface 612, and the other is set on any plane among the second plane 621a and the second inner surface 622. The number of the coupling-out grating 640 can be one, for example, it is set on any plane among the first inner surface 612 and the second inner surface 622. The number of the coupling-out grating 640 can be two, for example, it is set on the first inner surface 612 and the second inner surface 622. The specific settings of the coupling-in grating and the coupling-out grating can be arbitrarily combined according to the setting numbers and setting positions listed above. It should be noted that based on the above combination, Figure 6 The arrangement of the coupling-in grating and the coupling-out grating shown is a preferred embodiment. The combination of the first optical lens and the second optical lens can not only achieve vision correction, but is also equivalent to the superposition of two diffraction waveguides to improve optical efficiency, reduce optical losses, and enhance the display effect of color uniformity and brightness uniformity of the displayed image.

[0077] In one embodiment, according to Figure 7 As shown, the near-eye display device includes: a first optical lens 710 and a second optical lens 720 which are superimposed. The first optical lens 710 is a convex lens, and the second optical lens 720 is a concave lens.

[0078] The first optical lens 710 has a first outer surface 711 and a first inner surface 712. The second optical lens 720 has a second outer surface 721 and a second inner surface 722. The first outer surface 711 is a surface close to the environment. The second outer surface 721 is a surface close to the human eye. The first outer surface 711 has a first plane 711a and a first curved surface 711b. The second outer surface 721 is entirely a curved surface. The first inner surface 712 and the second inner surface 722 are both planes.

[0079] The first plane 711a and the second inner surface 722 are both provided with an in-coupling grating 730. The first inner surface 712 and the second inner surface 722 are both provided with an out-coupling grating 740.

[0080] based on Figure 7 In the near-eye display device shown, the direction of the light emitted by the optical engine can only be the first direction. The first direction is the direction from the environment side to the human eye side.

[0081] based on Figure 7The first optical lens 710 and the second optical lens 720 shown in the figure, the number of the coupling-in grating 730 can be one, for example, it is set on any plane among the first plane 711a, the first inner surface 712 and the second inner surface 722. The number of the coupling-in grating 730 can be two, for example, one is set on any plane among the second plane 711a and the first inner surface 712, and the other is set on the second inner surface 722. The number of the coupling-out grating 740 can be one, for example, it is set on any plane among the first inner surface 712 and the second inner surface 722. The number of the coupling-out grating 740 can be two, for example, it is set on the first inner surface 712 and the second inner surface 722. The specific settings of the coupling-in grating and the coupling-out grating can be arbitrarily combined according to the setting numbers and setting positions listed above. It should be noted that, based on the above combination, Figure 5 The arrangement of the coupling-in grating and the coupling-out grating shown is a preferred embodiment. The combination of the first optical lens and the second optical lens can not only achieve vision correction, but is also equivalent to the superposition of two diffraction waveguides to improve optical efficiency, reduce optical losses, and enhance the display effect of color uniformity and brightness uniformity of the displayed image.

[0082] An embodiment of the present invention provides an optical system, comprising: a near-eye display device as provided in any of the above embodiments and an optical machine. The optical machine is used to project light onto an incoupling grating. The two parts work together to achieve efficient and high-quality light processing to output high-quality display images.

[0083] An embodiment of the present invention provides an electronic device, which includes the optical system provided by any of the above embodiments.

[0084] The electronic device may be any one of a VR (Virtual Reality) device, an AR (Augmented Reality) device, and a DLP (Digital Light Procession) device.

[0085] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. For the device embodiment, its related parts can be referred to the partial description of the method embodiment.

[0086] The above describes a specific embodiment of the present specification. Other embodiments are within the scope of the appended claims. The various embodiments of the present specification have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A near-eye display device, characterized in that: include: A first optical lens and a second optical lens are arranged in a stacked manner, The first optical lens has a first outer surface and a first inner surface, and the second optical lens has a second outer surface and a second inner surface, wherein the first outer surface is a surface close to the environment, and the second outer surface is a surface close to the human eye. At least a portion of the first outer surface is a curved surface, at least a portion of the second outer surface is a curved surface, and both the first inner surface and the second inner surface are flat surfaces. A coupling-in grating is arranged on a surface of at least one of the first optical lens and the second optical lens, and the region where the coupling-in grating is located is a plane, and a coupling-out grating is arranged on at least one of the first inner surface and the second inner surface.

2. The near-eye display device according to claim 1, characterized in that: In the case where the first outer surface is provided with an incoupling grating, the first outer surface has a first plane and a first curved surface, and the incoupling grating provided on the first outer surface is provided on the first plane; In the case where the second outer surface is provided with a coupling-in grating, the second outer surface has a second plane and a second curved surface, and the coupling-in grating provided on the second outer surface is provided on the second plane.

3. The near-eye display device according to claim 1, characterized in that: In the case where the first optical lens is provided with an in-coupling grating and an out-coupling grating, the in-coupling grating and the out-coupling grating provided on the first optical lens are located on the same surface, or the in-coupling grating and the out-coupling grating provided on the first optical lens are located on different surfaces; In the case where the second optical lens is provided with an in-coupling grating and an out-coupling grating, the in-coupling grating and the out-coupling grating provided on the second optical lens are located on the same surface, or the in-coupling grating and the out-coupling grating provided on the second optical lens are located on different surfaces.

4. The near-eye display device according to claim 1, characterized in that: The direction of the light emitted by the optical machine is the first direction or the second direction, and the light emitted by the optical machine cannot pass through the curved surface before entering the coupling grating, wherein, The first direction is a direction from the environment side to the human eye side, and the second direction is a direction from the human eye side to the environment side.

5. The near-eye display device according to claim 1, characterized in that: In the case where both the first optical lens and the second optical lens are provided with coupling-in gratings, the area corresponding to the coupling-in grating provided on the first optical lens and the area corresponding to the coupling-in grating provided on the second optical lens are partially overlapped or completely overlapped; In the case where both the first inner surface and the second inner surface are provided with outcoupling gratings, the area corresponding to the outcoupling grating provided on the first inner surface and the area corresponding to the outcoupling grating provided on the second inner surface are partially overlapped or completely overlapped.

6. The near-eye display device according to claim 1, characterized in that: The coupling-in grating is a one-dimensional grating, and the coupling-out grating is a one-dimensional grating; or, The coupling-in grating is a one-dimensional grating, and the coupling-out grating is a two-dimensional grating; or, The coupling-in grating is a one-dimensional grating, and the coupling-out grating is a mixed one-dimensional grating and a two-dimensional grating.

7. The near-eye display device according to claim 1, characterized in that: The inner surface on which the outcoupling grating is arranged is also provided with a turning grating.

8. The near-eye display device according to any one of claims 1 to 7, characterized in that: The signs of the optical power of the first optical lens and the optical power of the second optical lens are opposite.

9. An optical system, characterized in that: include: A near-eye display device and optical machine as described in any one of claims 1-8, wherein the optical machine is used to project light onto the coupling-in grating.

10. An electronic device, characterized in that: Comprising the optical system as claimed in claim 9.

Images