CN109188695B

CN109188695B - Thin type large-field-angle near-to-eye display device

Info

Publication number: CN109188695B
Application number: CN201811144722.9A
Authority: CN
Inventors: 覃政
Original assignee: Beijing Antvr Technology Co ltd
Current assignee: Beijing Antvr Technology Co ltd
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2021-11-30
Anticipated expiration: 2038-09-29
Also published as: CN109188695A

Abstract

The invention discloses a thin near-to-eye display device with a large field angle, which is characterized in that two or more radial reflecting units are arranged in front of human eyes and are projected and spliced into images with a large area on retinas of the human eyes, so that the near-to-eye display effect with a large field angle is realized under a thin volume.

Description

Thin type large-field-angle near-to-eye display device

Technical Field

The invention relates to the field of near-to-eye display devices, in particular to a thin type large-field-angle near-to-eye display device.

Background

In the near-eye display system, in order to achieve a large-field-angle display effect, an imaging system with a larger aperture is generally required, and the focal length of the large-aperture imaging system is generally not too small, and represents the axial thickness of the near-eye display device.

The invention provides a new idea, which is characterized in that on the basis of keeping a larger caliber of an imaging system, a radial reflection unit is adopted to convert the thickness of the device into a radial size, a plurality of radial reflection units in the same direction or different directions are adopted, a larger field angle is realized by a splicing imaging mode, and the integral sheet shape of the device is kept, so that the device is more suitable for manufacturing a light, thin and portable glasses type display product.

Disclosure of Invention

The invention provides a thin type large-field-angle near-to-eye display device which adopts a radial reflection unit and realizes a large field angle in a splicing imaging mode.

The technical scheme of the invention is as follows: the thin near-eye display device with the large field angle comprises two or more radial reflection units, wherein the radial reflection units are arranged in front of human eyes to generate two or more sub-images which are spliced into a larger image on retinas of the human eyes, so that the near-eye display effect with the large field angle is realized under a thinner volume.

Preferably, the radial reflecting unit comprises a light source, a reflecting surface, a transmissive diopter and/or a reflective optical component,

before the light emitted by the light source is reflected into axial light, the light is firstly subjected to refraction amplification through the transmission type diopter or the reflection type optical component, so that human eyes can see clearly.

Preferably, the radial reflection unit is a multiple reflection radial reflection unit, and the light emitted by the light source is reflected twice or more times to finally enter the human eye in the process of being reflected into the final emergent light.

Preferably, the multi-reflection radial reflecting unit includes a multi-reflection structure,

the multiple reflection structure includes multiple reflection surfaces and/or polarizers and/or even order transmitters, and/or polarization changing reflectors, and/or polarization changers.

Preferably, the plurality of radial reflection units project the sub-images from the side surface in different directions, and the sub-images are spliced into a complete image on the retina of a human eye.

Preferably, the two radial reflection units project sub-images from the upper direction and the lower direction, and the sub-images are spliced on the retina of a human eye to form a complete image.

Preferably, the reflecting surfaces of three or more radial reflecting units have a pyramid structure, a turbine structure and an undulation structure.

Preferably, the plurality of radial reflection units project the sub-images from the side surface in the same direction, and the sub-images are spliced into a complete image on the retina of a human eye.

Preferably, the plurality of radial reflection units project the sub-images from the side surface in the same direction, each radial reflection unit is provided with an independent light source, or the plurality of radial reflection units share the same light source, a plurality of exit windows are formed through the light controller, only one exit window is opened in each time period to allow light to exit, the plurality of radial reflection units project different sub-images in different time periods alternately, and the length of each time period is extremely short, so that the human eyes can feel the plurality of sub-images simultaneously.

Preferably, the light controller comprises a transmissive light valve, a reflective light valve, a controllable mirror or an array of turning mirrors.

Preferably, the plurality of radial reflection units project light rays from different directions, a plurality of radial reflection units are overlapped in each direction, each radial reflection unit projects an independent sub-image, and the sub-images are spliced into a complete image on the retina of a human eye.

Preferably, the near-eye display device further comprises a compensation diopter member, and the focal length of the compensation diopter member is opposite to that of the near-eye diopter member, so that the compensation diopter member and the near-eye diopter member cancel each other out to allow the human eye to see external light, thereby realizing the transmission type display effect of augmented reality.

Preferably, the near-eye display device further comprises a moving component for adjusting the optical path length of the radial reflection unit so as to project sub-images with different focuses on the retina of a human eye.

Preferably, the two radial reflection units with different optical path lengths project two overlapped sub-images on the same area of the retina of a human eye, one sub-image is larger and provides a wide edge visual field, and the other sub-image is smaller and provides a central high-definition visual field, so that a near-eye display effect with wide edges and clear centers is provided.

The invention has the beneficial effects that: the invention discloses a thin near-to-eye display device with a large field angle, which is characterized in that two or more radial reflecting units are arranged in front of human eyes and are projected and spliced into images with a large area on retinas of the human eyes, so that the near-to-eye display effect with a large field angle is realized under a thin volume.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

Further objects, features and advantages of the present invention will become apparent from the following description of embodiments of the invention, with reference to the accompanying drawings, in which:

FIG. 1 schematically illustrates a block diagram of a thin, large field angle, near-eye display device;

fig. 2a to 2d are schematic structural diagrams of a radial reflection unit in a thin large-viewing-angle near-to-eye display device according to a first embodiment of the present invention.

Fig. 3a to 3f are schematic structural diagrams of a radial reflection unit in a thin large-viewing-angle near-to-eye display device according to a second embodiment of the present invention.

Fig. 4a to 4f, and fig. 5a to 5g are schematic structural diagrams of a multi-reflection structure of a radial reflection unit and a thin large-field-angle near-to-eye display device using the multi-reflection structure according to a third embodiment of the present invention.

Fig. 6-13 a-c are schematic structural views illustrating a thin large-viewing-angle near-to-eye display device according to a fourth embodiment of the invention.

Fig. 14-16 a-d are schematic structural views illustrating a thin large-viewing-angle near-to-eye display device according to a fifth embodiment of the invention.

Fig. 17a to e-30 are schematic structural views illustrating a thin large-viewing-angle near-to-eye display device according to a sixth embodiment of the invention.

Fig. 31a to 31d are schematic structural views of a thin large-viewing-angle near-to-eye display device according to a seventh embodiment of the present invention.

Fig. 32a to j and fig. 39a to b are schematic structural views illustrating a thin large-viewing-angle near-to-eye display device according to an eighth embodiment of the present invention.

Fig. 40 a-c-44 are schematic structural views illustrating a thin large-viewing-angle near-to-eye display device according to a ninth embodiment of the invention.

Fig. 45a to d-fig. 47a to c are schematic structural views of a thin large-viewing-angle near-to-eye display device according to a tenth embodiment of the present invention.

Detailed Description

The objects and functions of the present invention and methods for accomplishing the same will be apparent by reference to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in different forms. The nature of the description is merely to assist those skilled in the relevant art in a comprehensive understanding of the specific details of the invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.

Fig. 1 is a schematic structural diagram of a thin large-field-angle near-eye display device according to the present invention, as shown in fig. 1, the large-field-angle near-eye display device includes two or more radial reflection units, and the large-field-angle near-eye display device of the present embodiment includes a radial reflection unit 001 and a 002 radial reflection unit, where the radial reflection unit 001 includes a light source 101a, a reflection unit 102a, and the radial reflection unit 002 includes a light source 101b and a reflection unit 102 b;

the large-field near-eye display device further comprises a near-eye dioptric component 104, and in the embodiment, two radial reflection units are arranged in front of a human eye to generate two

sub-images

103a and 103b, and the sub-images are spliced on a retina of the human eye to form a larger image, so that a near-eye display effect with a larger field angle is achieved under a thinner volume.

The light source comprises a display screen, a projector, a light beam generator, a laser, a light modulator, a light reflector, a light refractor, a light diffractor and the like.

Example 1

In this embodiment, before the light emitted from the light source is reflected into the axial light, the light is subjected to dioptric amplification by the transmissive optical system or the reflective optical system, so that human eyes can see the light clearly.

Wherein the transmission type diopter comprises a convex lens, a Fresnel lens, a diffraction type lens, a polarization selection type lens and the like. The reflective optical system comprises a spherical reflector, an aspheric reflector, a free-form surface reflector and the like.

As shown in fig. 2a, light emitted from a light source 201a passes through a lens 202a for refractive magnification and then passes through a reflector 203a to become axial light to enter human eyes.

As shown in FIG. 2b, the light emitted from the light source 201b is subjected to refractive amplification by the curved reflector 202b, transmitted by the reflector 203b1 and reflected by the reflector 203b2 to become axial light to enter the human eye.

As shown in fig. 2c, the light emitted from the light source 201c is dioptric amplified by the lens 202c, reflected by the mirror 203c1 and reflected by the mirror 203c2 to become axial light to enter the human eye.

As shown in fig. 2d, the light emitted from the light source 201d is refraction-amplified by the curved reflector 202d, and then reflected by the reflector 203d to become axial light to enter the human eye.

Example 2

In this embodiment, after being reflected into an axial light, the light emitted from the light source is subjected to dioptric amplification by the transmission type diopter or the reflection type optical system, so that human eyes can see clearly.

Wherein the transmission type diopter comprises a convex lens, a Fresnel lens, a diffraction type lens, a polarization selection type lens and the like.

The reflective optical system comprises a spherical reflector, an aspheric reflector, a free-form surface reflector and the like.

As shown in fig. 3a, light emitted from the light source 301a enters the transmission type refractor 303a through reflection of the reflecting mirror 302a, and enters the human eye through refractive amplification of the transmission type refractor 303 a.

As shown in FIG. 3b, light from the light source 301b is reflected by the mirror 302b1 and the mirror 302b2 into the transmission diopter 303b and through the diopter magnification of the transmission diopter 303b into the human eye.

As shown in fig. 3c, light emitted from the light source 301c enters the curved reflector 303c via reflection from the reflector 302c, and enters the human eye via reflection from the curved reflector 303c and dioptric magnification.

As shown in fig. 3d, the light emitted from the light source 301d enters the curved mirror 303 for reflection and refraction amplification through the half-reflection of the mirror 302d1 and the selective reflection of the mirror 302d2, and finally enters the human eye through the selective transmission of the mirror 302d 2.

As shown in fig. 3e, the light emitted from the light source 301e is reflected by the mirror 302e1, transmitted by the curved mirror 303e and selectively reflected by the mirror 302e2, reflected and refraction-amplified by the curved mirror 303e again, and transmitted to the human eye by the mirror 302e 2.

As shown in fig. 3f, the light emitted from the light source 301f passes through half reflection of the mirror 302f1, selective reflection and dioptric amplification of the curved mirror 303f, transmission through the mirror 302f1 and reflection through the mirror 302f2, and finally transmission through the mirror 302f1 and selective transmission through the curved mirror 303f again into the human eye.

In fig. 3d to 3f, the reflector 302d2, the reflector 302e2, and the curved reflector 302f are all selective light-transmitting devices, and light rays are reflected for 3 times and transmitted for several times before finally entering human eyes, and in order to limit the light rays to operate according to a predetermined light path, a special multiple reflection structure is required to achieve the light-transmitting property selection, and a specific implementation method is described in example 3.

Example 3

FIGS. 4 a-4 f illustrate some of the multiple reflection structures that may be employed in the radial reflection unit; fig. 5a to 5g show other combinations of multiple reflection structures.

In this embodiment, the radial reflection unit is a multiple reflection radial reflection unit, and light emitted by the light source is reflected twice or more times to be finally emitted into human eyes in the process of being reflected into final emergent light.

This embodiment uses multiple reflective surfaces and/or polarizers and/or even-order transmitters, and/or polarization-altering reflectors, and/or polarization-altering devices to achieve multiple reflections of light.

In this embodiment, the parts not labeled except for the light rays in fig. 4a to 4f and fig. 5a to 5g are reflectors (or semi-reflectors), and the reflectors in this embodiment are mirrors.

Fig. 4a, 4b show a 2-time reflective structure, fig. 4c, 4d show a 3-time reflective structure, and fig. 4e, 4f show a 4-time reflective structure.

In fig. 4c and 4e, an even-order transmitter 401c and an even-order transmitter 401e are respectively provided, wherein the even-order projector is a four-layer composite structure composed of a quarter-wave plate, a semi-reflective film, a quarter-wave plate and a linear polarizer. When linearly polarized light with certain attributes enters the even-order transmitter for the first time, the linearly polarized light cannot be transmitted and can only be reflected; and when the reflected light is reflected for the second time and then enters the even-order transmitter, the reflected light can pass through. With this similar structure, the desired selective light transmittance in embodiment 2 can also be achieved.

In fig. 4f, a polarization transmitter 402f and a polarization-altering reflector 403f are provided, wherein the polarization transmitter 402f is a two-layer composite structure of a semi-reflective film, a linear polarizer,

the polarization change reflector 403f is a two-layer composite structure composed of a polarization change device and a reflective film. When linearly polarized light with certain attributes is incident into the polarization transmitter for the first time, the linearly polarized light cannot be transmitted and can only be reflected; and the reflected light can pass through when reflected by the polarization change reflector and then enters the polarization transmitter. With this similar structure, the desired selective light transmittance in embodiment 2 can also be achieved.

The polarization changer can be any device capable of changing or destroying the original polarization state of light, such as a scattering film, a diffraction film, an anisotropic film, a depolarization film, a quarter-wave plate, a half-wave plate, a full-wave plate and the like.

Similarly, FIG. 4c can also use the same polarization transmitter and polarization altering reflector as in the FIG. 4f arrangement to achieve the 3-fold reflection effect.

In the above six schemes of fig. 4a to 4f, the reflection structure undergoes 2, 3 or 4 reflections in the process of converting the radial light rays into the final emergent light rays. There are also many application examples of generating multiple reflections by setting different reflecting surfaces, which are not described herein.

By more than 1 reflection, the propagation distance of the light before the light is emitted can be extended more to meet different optical structure requirements.

Fig. 5a, 5b, and 5c are diagrams of a combination of 2-time reflection structures. The light propagation distance is extended by two times considerably, thereby realizing a near-eye display effect at a thickness of half the focal length.

As shown in fig. 5a, light from a light source 501a enters a near-eye refractive member 502a through two 2-fold reflection structures, and enters the human eye through refractive amplification of the near-eye refractive member 502 a.

As shown in fig. 5b, light emitted from the light source 501b enters the near-eye refractive member 502b through the optical path channel formed by the three 2-time reflection structures, and enters the human eye through the refractive amplification of the near-eye refractive member 502 b.

As shown in fig. 5c, light emitted from the light source 501c enters the near-eye refractive member 502c through the plurality of 2-time reflection structures, and enters the human eye through the refractive amplification of the near-eye refractive member 502b, wherein the light paths are ensured not to interfere with each other by using the plurality of polarizing plates 503 in fig. 5 c. After the light ray is emitted from 501c, the light ray passes through the three polarizers 503 and is processed into a light ray with a specific polarization state (linear polarization or circular polarization), and then the light ray can only transmit the polarizer 503 with the compatible polarization state with the own polarization state but can not transmit the polarizer 503 with the opposite polarization state, so that three light rays respectively pass through two reflections and the same optical path length and finally enter 502 c.

Fig. 5d uses two 3-fold reflecting structures in combination. The light propagation distance is extended by three times considerably, thereby realizing a near-eye display effect at a thickness of one third of the focal length.

As shown in fig. 5d, light from the light source 501d enters the near-eye refractive member 502d through two 3-fold reflection structures, and enters the human eye through the refractive magnification of the near-eye refractive member 502 d.

Fig. 5e and 5f use two 4-fold reflecting structures in combination. Wherein a polarizer and a polarization changer are used to ensure that the light does not spill out before completing 4 reflections. The light propagation distance is extended by three times considerably, thereby realizing a near-eye display effect at a thickness of one third of the focal length.

Fig. 5e shows light from a light source 501e entering a near-eye refractive member 502e through two 4-fold reflection structures and entering the eye through refractive magnification of the near-eye refractive member 502e, wherein fig. 5e is configured with a polarizer 503e and a polarization changer 504e to ensure that the light does not spill out before completing the 4-fold reflection. After the light is emitted from 501e, the light passes through the polarizer 503e, is processed into a light with a specific polarization state (linear polarization or circular polarization), and the light cannot pass through the polarizer 503e near the near-eye refractive member 502e (because the polarization state is opposite to that of the light), but can be reflected, passes through the polarization changer 504e, and then the polarization of the light is changed, and the light can pass through the polarizer 503e near the near-eye refractive member 502e, and finally enters the near-eye refractive member 502 e.

Fig. 5f shows that light from a light source 501f enters the near-eye refractive member 502f through two 4-fold reflection structures, and enters the human eye through the refractive magnification of the near-eye refractive member 502f, wherein fig. 5f is configured with a polarizer 503f and a polarization changer 504f to ensure that the light does not spill out before completing the 4-fold reflection.

Fig. 5g uses three 4-fold reflection structures in combination. The light propagation distance is extended by three times considerably, thereby realizing a near-eye display effect at a thickness of one third of the focal length.

Fig. 5g shows light from a light source 501g entering a near-eye refractive member 502g via three 4-fold reflection structures and entering the eye via refractive magnification of the near-eye refractive member 502g, wherein fig. 5g provides a polarizer 503g and a polarization changer 504g to ensure that the light does not spill out before completing the 4-fold reflection.

In fig. 5a to 5g, the near-eye refractive components are all transmission type dioptric devices, which may be single lenses, or may be formed by splicing a plurality of lenses, or may be a composite structure composed of multiple layers of reflecting layers and refractive layers.

In some cases, the near-eye dioptric component can be a multi-optical-axis composite lens formed by splicing a plurality of sub-lenses with different optical axes and/or focal lengths, one or more sub-lenses correspond to a specific optical path channel, and light rays of each optical path channel are refracted through the specially-arranged sub-lenses and then enter human eyes, so that a better spliced display effect can be realized; or a small lens (or a plurality of small lenses) can be arranged at the outlet of each light path channel to perform primary refraction, and then a complete large lens at the rear end performs secondary refraction, the small lenses and the large lens jointly form a lens array type multi-optical-axis near-eye refraction component, and light rays are incident into human eyes after twice refraction, so that a better splicing display effect can be realized.

In some cases, the near-eye refractive member may also be a reflective diopter that refracts and folds the light to be directed into the human eye.

Similar to the cases of fig. 5a and 5c, the near-eye refractive member may be a free-form surface mirror that refracts and reflects light to finally enter the human eye. In particular, the surface of the free-form surface reflector is provided with a polarization changer, so that the light path is not blocked by the polaroid after being folded back.

Example 4

In this embodiment, the plurality of radial reflection units project the sub-images from the side surfaces in different directions, and the sub-images are spliced into a complete image on the retina of a human eye.

In this embodiment, a light source represents a radial reflection unit, and the specific structure of the radial reflection unit is not specifically shown in this embodiment.

One, the first step.Two radial reflection units

Fig. 6 shows that the two radial reflection units of this embodiment project the sub-images from different directions from the side surface, and the sub-images are spliced into a complete image on the retina of a human eye.

As shown in fig. 6, two radial reflection units project sub-images from the upper and lower directions, and the sub-images are spliced into a complete image on the retina of a human eye.

And II, performing secondary treatment.Three or more radial reflecting units

The structural shapes of three or more radial reflecting units are the following three types:

a pyramid type, B turbine type and C wave type.

Fig. 7a1 and fig. 7a2 show the pyramid-shaped radial reflection unit of the present embodiment. Fig. 7a1 and fig. 7a2 include 6 radial reflection units, and may further include N (N is greater than 2) radial reflection units, for example, 3 radial reflection units, or 4 radial reflection units, as shown in fig. 8a to 8 b.

Fig. 7b1 and 7b2 show the turbine radial reflection unit of this embodiment. Fig. 7b1 and 7b2 include 6 radial reflection units, and may also include N (N is greater than 2) radial reflection units, for example, 12 radial reflection units, and as shown in fig. 9, 12 light sources are used to project 12 sub-images through 6 turbo-arranged reflection surfaces. The light sources and the sub-images with the same number in the figure correspond to each other and do not interfere with each other.

Fig. 7c1 and fig. 7c2 illustrate the structural configuration of the wavy radial reflective unit of this embodiment. Fig. 7c1 and 7c2 include 6 radial reflection units, each 2 radial reflection units form a group, and may further include N (N is greater than 2) radial reflection units, for example, three groups of radial reflection units, five groups of radial reflection units, and seven groups of radial reflection units, as shown in fig. 10a to 10 c. A plurality of light sources are adopted, and a plurality of sub-images are projected through a plurality of corresponding wavelike arranged reflecting surfaces.

Fig. 11a to 11b show another embodiment of the wave-shaped arrangement, in which 6 reflecting surfaces of the wave-shaped arrangement reflect the surrounding light source. The light source may be divided into 12 pieces and arranged in a hexagon as shown in FIG. 11a, or in a ring shape as shown in FIG. 11b

The light sources and the sub-images with the same number in the figure correspond to each other and do not interfere with each other.

Specifically, in fig. 10a to 10c, a plurality of light sources around the light source can be connected into a circle to form a complete ring light source.

In which, the optical path length of each radial reflection unit of fig. 7a1, fig. 7a2, fig. 7b1, fig. 7b2, fig. 7c1 and fig. 7c2 is uniform, and the same near-eye optical component (transmission near-eye optical component or reflection near-eye optical component) can be shared at the end, so that the human eye can see clearly. Particularly, when the near-eye dioptric part is a transmission type dioptric part, the near-eye dioptric part can be a single lens, can also be formed by splicing a plurality of lenses, can also be a composite structure formed by a plurality of layers of lenses, and can also be a composite structure formed by a plurality of layers of reflecting layers and refracting layers; when the near-eye diopter part is a reflective diopter part, the near-eye diopter part can be a single curved surface reflector, can also be formed by splicing a plurality of curved surface reflectors, and can also be a composite structure formed from multiple reflecting layers and multiple refracting layers.

Fig. 12 shows another embodiment in which a plurality of radial reflection units project sub-images from different directions from the side surface, and the sub-images are spliced on the retina of a human eye to form a complete image, and 8 sub-images are projected by using 4 radial reflection units and corresponding 8 reflection surfaces.

And thirdly, performing the operation of the device.Method for processing stray light for a plurality of radial reflecting units

When a plurality of radial reflecting units are adopted, light rays emitted by the light source can be reflected by the corresponding reflecting surface and can also be mistakenly reflected by other reflecting surfaces, and stray light can be formed if the mistakenly reflected light rays finally enter human eyes. Therefore, it is necessary to take a corresponding measure to cut off stray light. There are the following three solutions, fig. 13a to 13 c.

As shown in fig. 13a, at a light source 1301a, an elliptical polarizer 1302a1 (specifically, a circular polarizer may be used) is disposed to process light into elliptical polarized light (or circularly polarized light), the elliptical polarized light (or circularly polarized light) is reflected by a correct reflecting surface 1303a, and then reflected by a secondary reflecting surface 1305a (which may be a flat reflecting surface or a curved reflecting surface), and since the light is reflected twice, the polarization state of the light can pass through the elliptical polarizer 1302a2 (specifically, a circular polarizer may be used) disposed in the emitting direction. After the light is reflected by the wrong reflective surface 1304a, the light cannot pass through the elliptical polarizing plate 1302a2 due to its polarization state after being reflected only once, and thus no stray light is generated.

As shown in fig. 13b, at the light source 1301b, a linearly polarizing plate 1302b1 is provided to process the light into linearly polarized light. Specifically, the light emitted from the light source is a kind of linearly polarized light. The projected light, in a linearly polarized state, strikes the correct reflecting surface 1303b, producing transmitted and reflected light. The polarization of the transmitted light is perpendicular to the linearly polarizing plate 1302b2, and is blocked, and the light is not projected to the wrong reflecting surface 1304b, so stray light is not generated; the reflected light passes through a polarization changer 1306b (any device capable of changing or destroying the original polarization state of the light, such as a scattering film, a diffraction film, an anisotropic film, a depolarization film, a quarter-wave plate, a half-wave plate, a full-wave plate, etc.), then is reflected by a secondary reflecting surface 1305b, and then passes through the polarization changer 1306b, at this time, the polarization of the light is changed, so that the light can pass through a line polarizer 1302b2 and finally enter the human eye;

as shown in fig. 13c, at a light source 1301c, a linearly polarizing plate 1302c is provided to process the light into linearly polarized light. Specifically, the light emitted from the light source is a kind of linearly polarized light. The projected light rays, in their linearly polarized state, strike the correct reflecting surface 1303c, which in this case is a polarizing beamsplitter.

The polarization beam splitter has the characteristics of completely reflecting light rays in certain polarization states and completely transmitting light rays in certain polarization states.

The projection light in the linear polarization state is only reflected on the surface of the correct reflecting surface 1303c, is not transmitted, and cannot be projected to the wrong reflecting surface 1304c, so stray light cannot be generated; the reflected light passes through the polarization changer 1306c and then changes its polarization, so that the reflected light can be transmitted through the correct reflection surface 1303c and enter the human eye.

Example 5

In this embodiment, the plurality of radial reflection units project each sub-image from the side surface in the same direction, and the sub-images are spliced into a complete image on the retina of a human eye. In order to prevent the light among the radial reflecting units from interfering, the light sources can emit light with different polarization states, and then the light of different radial reflecting units is isolated through the polarization selector.

Wherein the polarization selector includes various polarization filters such as a linear polarizer, or a polarization splitter.

Fig. 14 shows the present embodiment where multiple radial reflection units project sub-images from the side surface in the same direction. As shown in fig. 14, the radial reflection unit 1401a and the radial reflection unit 1401b transmit from top to bottom, and project the sub-images 1402a and 1402b from the side.

Fig. 15a to 15d, and fig. 16a to 16d are schematic diagrams illustrating specific radial reflection unit structures of the multiple radial reflection units of the present embodiment projecting the sub-images from the side surface in the same direction.

In the configuration shown in fig. 15a to 15d, two radial reflecting units are spatially overlapped, and the source end is provided with the linear polarizer 15021 and the linear polarizer 15022, so that the light emitted from the light source 15011 and the light source 15012 have different polarization states, for example, mutually perpendicular linear polarization states.

In fig. 15a, a linear polarizer 15023 and a linear polarizer 15024 are positioned at the end of the light path such that the

linear polarizers

15021 and 15023 are aligned, so that the light from the light source 15011 is ultimately emitted only through the linear polarizer 15023; similarly, light from source 15012 is ultimately emitted only through polarizer 15024. Since the two optical paths have the same length, the same transmissive diopter member 1504 can be shared, so that the human eye can see the image clearly.

Fig. 15b is different from fig. 15a in that the reflective structure reflects light outward and then inward. With this configuration, the entire optical path can be made longer, and the distance between the transmissive dioptric member and the linearly

polarizing plate

15023 and 15024 can be made longer, so that a more excellent optical effect can be achieved. Because the lengths of the two optical paths are consistent, the same transmission type refraction component can be shared, and human eyes can see images clearly.

In fig. 15c, the reflective structure reflects light outward first and projects toward the reflective diopter member, which is a curved reflector, and deflects the propagation direction of light when bending, and in order to prevent the subsequent display effect from being affected, a polarization changer 1505c needs to be disposed on the surface of the reflective diopter member 1506c to change the existing polarization state of all light, so that the light will not be blocked again when being reflected by the reflective diopter member and projected to the human eye. Because the lengths of the two optical paths are consistent, the two optical paths can share the same reflective dioptric component, so that human eyes can see images clearly.

FIG. 15d shows a special polarization splitter, where the light source 15011 emits polarized light that is totally reflected but not transmitted, and the light source 15012 emits polarized light that is only transmitted but not reflected, as shown in the light path. A polarization changer 1505d is disposed on the surface of the reflective diopter 1506d to change the existing polarization state of all light rays so that the light rays are not blocked during reflection by the reflective diopter towards the human eye. Because the lengths of the two optical paths are consistent, the two optical paths can share the same reflective dioptric component, so that human eyes can see images clearly.

In the above four cases of fig. 15a to 15d, two different optical paths are isolated in two perpendicular linear polarization directions, and similarly, two different optical paths may also be isolated in two opposite circular polarization directions, which have similar principles and are not described in detail.

Fig. 16a to 16d show other embodiments of the arrangement of the light source, the reflective surface, and the polarizer, wherein the light source 16011 and the light source 16012 are two independent light sources, the rectangles filled with lines represent the polarizer, the blank rectangles represent the reflective component, i.e. the reflective surface, and the specific structure is as shown in the figures, and it is noted that:

the linear polaroids are adopted as polarization selectors at the outlets, and similarly, the polarization beam splitters can also be adopted for light path isolation;

two different optical paths are isolated in two perpendicular linear polarization directions, and similarly, two different optical paths can also be isolated in two opposite circular polarization directions.

Because the lengths of the two optical paths are consistent, the same near-eye dioptric component (a transmission dioptric component or a reflection dioptric component) can be shared, and the human eyes can see the image clearly.

As shown in fig. 16c, in particular, only one light source may be used to function as both light sources. For example, a light source is placed at the position of the light source 16011, the light source can emit two polarized lights with mutually perpendicular polarization directions at the same time, and the two polarized lights form two different images (in a specific scheme, a polarizing film can be covered on the surface of a pixel to enable two adjacent pixels on the surface of the light source to emit different polarized lights), after the two images are transmitted downwards, the two images respectively enter different light paths, and finally the two images are spliced into a complete image on human eyes; or the light source may generate two polarized lights with mutually perpendicular polarization directions in two different time periods (in a specific scheme, a polarizer and a corresponding optical channel may be disposed outside the light source, and the light emitted by the light source may be processed into different polarization states at different times, such as a method similar to that illustrated in fig. 27a and 27b, or other optical structures capable of generating two polarized lights with mutually perpendicular polarizations at different times are adopted), and the two polarized lights constitute two different images, and the two time periods are switched quickly, so that human eyes cannot perceive the switching process, and thus the two images appear simultaneously.

Similarly, a similar approach can be used, as shown in FIG. 16d, where one light source is used to function as both light sources.

Example 6

In this embodiment, the plurality of radial reflection units project the sub-images from the side surface in the same direction, each radial reflection unit has an independent light source, or the plurality of radial reflection units share the same light source, in order to prevent interference of light between the radial reflection units, a plurality of exit windows may be formed by a light controller such as a transmissive light valve, a reflective light valve, or a controllable mirror, and only one exit window is opened in each time period to allow light to be emitted, the plurality of radial reflection units project different sub-images in different time periods alternately, and the length of each time period is extremely short, so that a human eye can sense the plurality of sub-images simultaneously.

A plurality of radial reflecting units project each sub-image from the side surface in the same direction, and each radial reflecting unit With separate light sources

Fig. 17a to 17e are schematic diagrams of the present embodiment, and as shown in fig. 17a, the present embodiment is an embodiment having a plurality of independent light sources:

there are four light sources above the light source, including light source 17011, light source 17012, light source 17013, and light source 17014, and only one of the light sources is illuminated in each time period, and at the same time, only one exit window is opened to let light pass through. The four light sources are consistent with the corresponding exit window 17021, exit window 17022, exit window 17023 and exit window 17024 in optical path length, and can share the same near-eye refractive component (transmission type near-eye refractive component or reflection type near-eye refractive component) at the tail end, so that human eyes can see clearly.

Fig. 17b to 17e are schematic diagrams illustrating further explanation of the present embodiment, and as shown in the drawings, fig. 17b to 17e correspond to 4 moments, t1, t2, t3 and t4 respectively, and the light source is divided into four independent areas (light source 17011, light source 17012, light source 17013 and light source 17014) which can independently control the emitted light. Each reflecting surface below corresponds to an exit window, and in this embodiment, the exit windows are all transmissive light valves.

The transmissive light valve may be a liquid crystal light valve, or other device with controllable light transmittance. Upon receiving different control signals, the transmissive light valve exhibits both transmissive and blocking effects for a particular light ray (typically polarized light).

Only one of the light sources emits light in each time period, and only one exit window formed by the transmission type light valve allows light to pass through.

At time t1, light source 17011 emits light, and its corresponding exit window 17021 opens to let light pass through.

At time t2, light source 17012 emits light and its corresponding exit window 17022 opens to allow light to pass through.

At time t3, light source 17013 emits light, and its corresponding exit window 17023 opens to allow light to pass through.

At time t4, light source 17014 emits light, and its corresponding exit window 17024 opens to allow light to pass through.

The four light sources are consistent in optical path length with the corresponding exit window 17021, exit window 17022, exit window 17023 and exit window 17024, and can share the same near-eye refraction component 1703 at the tail end, so that human eyes can see clearly.

Wherein the near-eye refractive member 1703 comprises a transmissive near-eye refractive member or a reflective near-eye refractive member. Particularly, when the near-eye dioptric part is a transmission type dioptric part, the near-eye dioptric part can be a single lens, can also be formed by splicing a plurality of lenses, can also be a composite structure formed by a plurality of layers of lenses, and can also be a composite structure formed by a plurality of layers of reflecting layers and refracting layers; when the near-eye diopter part is a reflective diopter part, the near-eye diopter part can be a single curved surface reflector, can also be formed by splicing a plurality of curved surface reflectors, and can also be a composite structure formed from multiple reflecting layers and multiple refracting layers.

Fig. 18a to 18b, fig. 19a to 19b, fig. 20a and 20b show other embodiments of the present embodiment in which the four light sources, the reflecting surface and the exit window are arranged in different manners. The blank rectangles not marked in the embodiment represent the reflecting surfaces.

Fig. 18a shows the light path of the light emitted from the light source 18011 at time t1, wherein the exit window 18021 corresponding to the light source 18011 is opened at time t1 to allow the light to pass through.

Fig. 18b shows the light path of the light emitted from the light source 18012 at time t2, wherein the exit window 18022 corresponding to the light source 18012 is opened at time t2 to allow the light to pass through.

Fig. 18 a-18 b include two independent light sources that can independently control the emitted light. The

light sources

18011 and 18012 emit light at different times, the light emitted by the light sources 18011 is reflected down twice, and the light emitted by the light sources 18012 is reflected down once. The optical path lengths formed by the two light sources and the corresponding exit windows are consistent.

Fig. 19a shows the light path of the light emitted from the light source 19011 at time t1, wherein the exit window 19021 corresponding to the light source 19011 is opened at time t1 to allow the light to pass through.

Fig. 19b shows the path of light emitted by the light source 19012 at time t2, wherein the exit window 19022 corresponding to the light source 19012 is opened at time t2 to allow light to pass through.

At two different moments t1 and t2, the two light sources and the corresponding exit windows form two light paths, and the lengths of the two light paths are consistent.

Fig. 20a to 20b show other two embodiments in which the light sources, the reflecting surface, and the exit window are arranged differently. As shown in the figure, two light sources and corresponding exit windows form two light paths at two different moments, and the lengths of the two light paths can be consistent or inconsistent by adjusting the positions of the light source 20011 and the light source 20012.

And II, performing secondary treatment.Multiple radial reflecting units projecting each sub-image from side surface in the same direction Share the same light source

The blank rectangles not marked in the drawing of the present embodiment each represent a reflection surface.

Fig. 21 is a schematic diagram of the present embodiment, and as shown in fig. 21, includes a light source 2101, an exit window 21021, an exit window 21022, and an exit window 21023; the radial reflection units project all sub-images from the side surface in the same direction and share the same light source. The light source displays different images in different time periods, and only one exit window is opened to allow light to pass through.

Fig. 22 to 24 are schematic views showing specific radial reflection unit structures of the present embodiment.

Fig. 22 shows a light source 2201, a front diopter 2202, an exit window 22031, an exit window 22032, an exit window 22033, and an exit window 22034. The exit window of this embodiment is a transmissive light valve.

Light rays emitted by the same light source 2201 pass through the front diopter 2202, are changed into near parallel light (high beam), pass through a plurality of subsequent reflecting surfaces, and enter human eyes through different exit windows at different time periods, so that an image is formed on a retina.

Fig. 23 shows a light source 2301, an exit window 23021, an exit window 23022, an exit window 23023, and an exit window 23024. The exit window of this embodiment is a transmissive light valve.

As shown in fig. 23, in order to ensure the total optical path length of the plurality of radial reflecting units to be uniform,

the same light source 2301 emits four different images at four different times. In the lower reflecting structure, multiple reflecting structures are respectively adopted to form four groups of reflecting structures, and light rays are respectively reflected for 1-4 times.

The light source 2301 and the four exit windows form a light path with the same length, and the light path can directly enter human eyes; or share the same near-eye refractive member (transmissive near-eye refractive member or reflective near-eye refractive member) at the ends, so that the human eyes can see clearly.

Fig. 23 shows a case where four radial reflection units are combined, and a reflection structure of one of the radial reflection units may be reduced to form a triple combination; or two of the reflecting structures are reduced to form a dual combination. The principle is similar and is not described in detail.

As shown in fig. 24, this figure also shows a case where four radial reflecting units are combined, and the total optical path lengths of the plurality of radial reflecting units are the same, and different from the previous figure 23, the specific form of a part of the reflecting surfaces in the structure is different.

Different structures of the exit window

Fig. 25a to 25b, fig. 26 are schematic views showing different structures of the exit window of the present embodiment.

The exit window of this embodiment further includes a light controller such as a reflective light valve or a controllable mirror, so as to form a plurality of exit windows.

As shown in fig. 25a, the exit window is a reflective light valve, and includes 4 reflective light valves, a reflective light valve 25011a, a reflective light valve 25012a, a reflective light valve 25013a, a reflective light valve 25014a, and a near-eye refractive component 2502a, where the reflective light valve may be a combination of a liquid crystal light valve and a mirror, or may be another device with controllable light transmittance and light reflectance. When different control signals are received, the reflective light valve has two effects of reflecting light and not reflecting light for specific light.

As shown in fig. 25b, the exit window is a controllable mirror, which includes 4 controllable mirrors, a controllable mirror 25011b, a controllable mirror 25012b, a controllable mirror 25013b, a controllable mirror 25014b, and a near-eye refractive component 2502b, and the controllable mirror may be a mechanical rotary type, a louver type, a micro-electromechanical type device, or other devices with controllable light reflection rate and light reflection direction. When different control signals are received, the controllable reflector has two effects of effective reflection and ineffective reflection (or no reflection) on specific light.

As shown in fig. 26, the exit window is a turning mirror array, and a plurality of independent optical paths are formed by using the turning mirror array.

Fig. 26 includes a light source 2601, a turning mirror array 001, and a turning mirror array 002.

The turning mirror array is composed of a plurality of minute turning mirrors 2602 of controllable rotation angles, and each turning mirror 2602 can be rapidly switched under two or more angle states independently according to a control signal to realize control of the light reflection direction.

The rotating mirror can be mechanical, such as a mechanical rotating shaft and a power device are arranged; the micro-electromechanical rotating mirror can also be of a micro-electromechanical type and can rotate under the control of electromagnetic force;

the light source 2601 emits light toward the turning mirror array 001, and at a certain time, only one turning mirror is in a working state, and the light is reflected downward to the corresponding turning mirror in the turning mirror array 002, and finally reflected out.

In each independent time period (t1, t2 or t3), only one optical path is in a working state, so that the isolation of multiple optical paths is realized, and the length of each optical path is ensured to be consistent. The same near-eye refractive member (transmissive near-eye refractive member or reflective near-eye refractive member) may be shared at the ends so that the human eye can see clearly.

Case of dual reuse of the same light source

FIGS. 27a to 27b show the present embodimentWith dual use of the same light sourceThe situation is.

As shown in FIG. 27a, light source 2701a emits two different images at different times, at which time reflective light valve 27022a is deactivated and light is reflected by reflective light valve 27021a to provide polarized light that passes only through linear polarizer 27033a and not through linear polarizer 27034 a; at another time, reflective light valve 27021a is not operating and light is reflected by reflective light valve 27022a to provide a polarization that passes only through linear polarizer 27034a and not through linear polarizer 27033 a. The lengths of the two optical paths at different times are consistent.

As shown in fig. 27b, the light source 2701b emits two different images at different times, and at a certain time, the transmissive light valve 27022b is not operated, and the light passes through the transmissive light valve 27021b to form a polarized light that passes through the transmissive polarizer 27031b only and not through the transmissive polarizer 27032 b; at another time, the transmissive light valve 27021b is not operated and light is transmitted through the transmissive light valve 27022b to form a polarized light that passes only through the linear polarizer 27032b and not through the linear polarizer 27031 b. The lengths of the two optical paths at different times are consistent.

An integrated embodiment:

fig. 28a to 28b show an 8-piece sub-image projection apparatus. Each sub-image emerges from a respective exit window.

Only four exit windows 2802 (unshaded) are open at one time as shown; at another moment, another four exit windows (shaded portions) are opened. Around 8 individual light sources 2801, or one ring light source, are used.

The 8 radial reflecting units can adopt a wave type or a turbine type. The optical path lengths of all the radial reflection units are consistent, and the same near-eye refraction component 2803 is shared at the tail end, so that human eyes can see clearly. Where the dashed line represents the light source mirror 2804.

Hybrid isolation process

The isolation of a plurality of light paths in the same direction is realized by setting different polarization states, which is called as a polarization isolation method;

the isolation of a plurality of light paths in the same direction is realized by switching on and off different light paths at different moments, which is called as a time division isolation method.

The present embodiment can be implemented by combining the polarization isolation method and the time division isolation method: a hybrid isolation method.

Fig. 29 shows a quadruple radial reflecting unit structure.

The light source end adopts a reflective light valve 29031, the reflective light valve 29032 is used as a light path switcher, the tail end adopts a transmissive light valve 29041, and the transmissive light valve 29042 is used as a light path breaker.

At two different times t1 and t2, the light source 2901 displays different images and is divided into an upper portion and a lower portion to emit light beams with different polarization states, and at this time, one reflective light valve and the corresponding transmissive light valve are in an operating state.

At two moments, the lengths of the optical paths are consistent, and the tail ends of the optical paths share the same near-eye refraction component, so that human eyes can see clearly.

Fig. 30 shows a six-fold radial reflecting unit structure.

The light source 3001 uses a reflective light valve 30021, a reflective light valve 30022 and a reflective light valve 30023 as light path switches, and uses a transmissive light valve 30031, a transmissive light valve 30032 and a transmissive light valve 30033 as light path interrupters.

At three moments of t1, t2 and t3, the optical path lengths are consistent, and the tail ends of the optical paths share the same near-eye refraction component, so that human eyes can see clearly.

Example 7

In the embodiment, the plurality of radial reflection units project light rays from different directions, the plurality of radial reflection units are overlapped in each direction, and each radial reflection unit projects an independent sub-image to be spliced into a complete image on the retina of a human eye.

Fig. 31a to 31d are schematic structural views of the present embodiment.

FIG. 31a, two directions up and down, each direction quadruple, each radial reflecting unit having an independent light source; the image processing system comprises 8 light sources 31011-31018 for projecting 8 sub-images 31021-31028.

Fig. 31b, two directions of projection, two projections in each direction, two radial reflection units in each direction share the same light source; the image processing system comprises 2 light sources 31011-31012 for projecting 4 sub-images 31021-31024.

FIG. 31c, three direction projection, two direction projections, two radial reflection units sharing the same light source; includes 3 light sources 31011-31013 projecting 6 sub-images 31021-31026.

Fig. 31d is similar to fig. 31c, but the sub-image stitching is different.

Example 8

The near-to-eye display device can realize the augmented reality transparent display effect, and the specific realization method comprises the following steps:

1) the optical structure of the middle part of the near-eye display device can allow external light to penetrate through, and keeps the focal length of the whole device to the external light infinite, so that human eyes can see the external environment clearly, and the transmission type display effect of augmented reality is achieved.

2) Near-to-eye display device, inside contains transmission type dioptric member, can allow external light to see through, nevertheless can carry out the refraction to external incident light with certain focus, adds a compensation dioptric member (such as spherical lens, aspherical lens, fresnel lens etc.) again in the outside of whole device, and its focus is opposite with transmission type dioptric member's focus, can allow human eyes to see external light clearly after offsetting each other to realize augmented reality's transmission formula display effect.

In the scheme, the near-eye display device allows external light to directly penetrate through the near-eye display device without refraction.

Scheme one

Fig. 32a to 32j show that two independent light sources are used to form two independent radial reflection units through respective reflection channels, two sub-images are generated and spliced into a complete image on the retina of a human eye, and the whole device allows external light to directly pass through without refraction.

Fig. 32a to 32j show a light source 32011, a light source 32012, a plurality of linear polarizers 3202, a near-eye refractive member 3203, a reflective refractive member 3204, a polarization changer 3205, and a plurality of reflective surfaces (not labeled). Because of the arrangement of the linear polarizer 3202, the polarization changer 3205, and the reflective surfaces as shown, the light path can only exit through a single correct path. The principle is the same as the polarization isolation method, and is not described in detail.

Scheme two

Fig. 33 a-33 b use two independent light sources to project images from two directions, one above the other, and two sub-images from each direction. Four sub-images are generated in total and are spliced into a complete image on the retina of the human eye.

While the entire device allows ambient light to pass directly through without refraction.

In fig. 33a, a light source 33011, a light source 33012, a number of linear polarizers 3302, reflective diopter members 3303, polarization modifiers 3304,

the light emitted by a single light source is divided into two light beams which are projected to the center in different polarization states, are selected by corresponding linear polaroids, enter a correct channel, are processed into high beams by the reflection refraction component and enter human eyes to be seen clearly.

Fig. 33b is based on fig. 33a, with the addition of a plano-concave lens 3305 and a plano-convex lens 3306, so that the refractive surfaces of the reflective diopter members 3303 and the plano-convex lens 3306 (twice to and fro) together achieve a shorter dioptric focal length, while keeping the overall optical system's outer focal length infinite.

To achieve better display, both schemes of fig. 33a and 33b incorporate a polarization changer 3304.

In order to prevent light from entering the wrong reflection channel, more polarizers or light shields may be added at other positions to isolate the light path, which is not described herein.

Scheme three

Fig. 34a to 34d are some modifications made to prevent light from entering the wrong reflection path.

As shown in fig. 34a to 34c, including a plurality of polarizers 3401 and reflective optical components 3402, additional polarizers are added at certain positions in fig. 34a to 34c, which not only perform optical path isolation for internal display light, but also help prevent external light from entering human eyes through reflection of a plurality of reflective surfaces, thereby forming double images.

In FIG. 34d, a horizontally disposed boundary polarizer 3403 is also added at the bottom of the figure to prevent light from continuing downward. Thus, additional optical structures can be added below the boundary polarizer 3403 without coming into contact with the light rays emitted above.

On the basis, more polarizing plates or light shielding plates can be added at other positions for optical path isolation, and are not described herein again.

Scheme four

Fig. 35 shows the use of polarization splitters for optical path isolation.

As shown in fig. 35, light rays emitted from the light source 3501 are processed by the linear polarizer 35021 and the linear polarizer 35022 to become two linearly polarized light beams with polarization directions perpendicular to each other. When the light emitted from the linear polarizer 35021 hits the polarization beam splitter 35051, only reflection occurs, and no transmission occurs; light rays emitted by the linear polarizer 35022 are only transmitted and not reflected when they strike the polarization splitter 35051, and are only reflected and not transmitted when they strike the polarization splitter 35052.

All the light rays are reflected by the polarization beam splitter 35051 and the polarization beam splitter 35052, then are projected to the polarization changer 3504, are reflected by the reflection diopter 3503, and then pass through the polarization changer 3504, and then the polarization of the light rays is changed, so that the light rays can smoothly pass through the polarization beam splitter 35051 and the polarization beam splitter 35052 and finally are emitted to human eyes.

Meanwhile, after being reflected by the polarization beam splitter 35052, the external light rays upwards touch the polarization beam splitter 35051, and are directly transmitted without reflection, so that no ghost image is formed when the external light rays are incident on human eyes.

Scheme five

Fig. 36 shows that a total of four sub-images are generated using two horizontally disposed light sources above and below. The light source 36011, the light source 36012, a plurality of polarizers 3602, a reflecting diopter component 3603, a polarization changer 3604 and a boundary polarizer 3605.

As shown in fig. 36, some polarizers are added in the device structure to isolate four optical paths, and prevent external light rays from reflecting and entering human eyes for multiple times to form double images; the use of the boundary polarizer 3605 prevents interference of light rays emitted from the upper and lower light sources.

Preferably, the polarization converter 3604 is added at the outermost side of the device, so that polarized light (such as specular reflection light, computer display light, mobile phone display light, television display light and the like) in the external environment can be completely seen by human eyes through the whole device.

Scheme six

Fig. 37 shows an embodiment of four sub-image stitching.

FIG. 37 shows the use of a polarization selective transmission diopter 3701 at the tip. The polarization selective transmission diopter is characterized in that light rays which pass through can be screened, only refraction is carried out on internal display light (in one polarization state) and no refraction is carried out on external light (in the other polarization state), so that human eyes can see the internal display light rays and the external environment light rays clearly at the same time.

Optical techniques for achieving such effects exist in the art, and there are multiple ways to achieve such effects, which are not described herein.

Setting up compensation refraction part to realize augmented reality transparent display effect

Near-to-eye display device, inside contains transmission type dioptric member, can allow external light to see through, nevertheless can carry out the refraction to external incident light with certain focus, adds a compensation dioptric member (such as spherical lens, aspherical lens, fresnel lens etc.) again in the outside of whole device, and its focus is opposite with transmission type dioptric member's focus, can allow human eyes to see external light clearly after offsetting each other to realize augmented reality's transmission formula display effect.

Fig. 38 is a structural view showing a specific near-eye display device of this embodiment, and as shown in fig. 38, includes a light source 38011, a light source 38012, a polarizing plate 3802 (including 8 polarizing plates), a compensation diopter member 3803, and a transmission diopter member 3804.

In fig. 38, in a four-sub image split scheme, the inner transmissive diopter member 3804 is a positive focal length lens, and the outer compensating diopter member 3803 is a negative focal length lens, so that the equivalent focal length is zero after the external light passes through the whole optical system, and the human eye can see the external light clearly.

Fig. 39a to 39b show an integrated embodiment of the present embodiment.

Including light source 3901, transmissive diopter component 3903, compensation diopter component 3902, exit window 3904(s).

FIGS. 39 a-39 b show a 24-sub-image projection splicing apparatus. Each sub-image emerges from a respective exit window, constituting a radial reflecting element.

Only four exit windows 3904 in a cruciform arrangement are open during each time period. There are six time segments so that the 24 sub-images are all projected onto the retina of a human eye in turn.

24 individual light sources 3901, or one ring light source, are used around.

The 24 radial reflecting units can adopt a wave type or a turbine type.

The optical path lengths of the radial reflecting units are consistent, and the same near-eye refractive part 3903 (in this case, a transmission type near-eye refractive part) is shared at the tail end, so that human eyes can see clearly.

The external use of the compensating diopter component 3902 enables the human eye to see external light clearly.

Example 9

In the embodiment, a plurality of radial reflecting units with different focal lengths or optical path lengths project a plurality of overlapped sub-images in the same area on the retina of a human eye, the sub-images have different focuses, only one of the sub-images can be clearly imaged on the retina along with different states of the lens of the human eye, and the rest sub-images are in a fuzzy state; these overlapping sub-images may be projected simultaneously, or may be projected separately at different times and switched in turn quickly, or may be projected only one of the sub-images at a time as desired by the application.

One, the first step.Two sub-images of different focal points are projected on the same area of the human eye retina:

fig. 40a to 40c show the present embodiment projecting two sub-images with different focal points on the same area of the retina of a human eye.

Fig. 40a includes a light source 40011, a light source 40012, a near-eye diopter member 4002, and a plurality of reflective surfaces (not labeled), in which fig. 40a employs two independent light sources (light source 40011 and light source 40012) to emit light simultaneously, the two light beams form different optical path lengths after being reflected for multiple times, and finally enter human eyes after passing through the near-eye diopter member 4002, and two sub-images with different focuses are formed on retinas of the human eyes.

FIG. 40b includes light source 40011, light source 40012, polarizer 4003(s), near-eye refractive member 4002, and reflecting surfaces (not labeled), where in FIG. 40b, light source 40011 and light source 40012 are in different positions compared to FIG. 40a, and a larger field of view is achieved by polarization isolation with the addition of polarizers.

Fig. 40c includes a light source 4001, a reflective light valve 40041, a reflective light valve 40042, a near-eye refractive member 4002, and a plurality of reflective surfaces (not labeled), wherein light emitted from the light source 4001 in fig. 40c is reflected by the reflective light valve 40042 or the reflective light valve 40041 at different times to form two light paths with different lengths, so that two sub-images with different focuses can be projected at different times. Two sub-images cannot be displayed simultaneously, but can be switched in turn quickly; or one of the sub-images is selected to be displayed according to application requirements.

And II, performing secondary treatment.Three sub-images of different focal points are projected on the same area of the human eye retina:

FIG. 41 shows the projection of three sub-images of different focal points onto the same area of a human eye's retina, including 3 light sources 41011-41013, near-eye diopter components 4102, and several reflective surfaces (not labeled).

Fig. 41 adopts three independent light sources, three light rays form different optical path lengths after being reflected for multiple times, and finally enter human eyes, and three sub-images with different focuses are formed in the same area of human eyes retina.

And thirdly, performing the operation of the device.Four sub-images of different focal points are projected on the same area of the human eye retina:

FIG. 42 shows the projection of four sub-images at different focal points on the same area of the human retina, including a light source 4201, reflective light valves 42021-42024, near-eye refractive member 4203, and reflective surfaces (not labeled)

Fig. 42 adopts a light source, four light beams with different optical path lengths are formed by switching four reflective light valves, and finally enter human eyes through the near-eye dioptric component, and four sub-images with different focuses are formed in the same area of the retina of the human eyes.

The four sub-images cannot be displayed simultaneously, but can be switched in turn quickly; or one of the sub-images is selected to be displayed according to application requirements.

And fourthly, the method comprises the following steps.The near-eye display device is provided with a moving part for adjusting the optical path length of the radial reflecting unit Sub-images of different focal points are projected on the retina of the human eye.

FIG. 43 shows a schematic diagram of a light source 4301, a linear motion device 4302, a near-eye dioptric member 4303, a reflective surface (not labeled)

As shown in fig. 43, a linear motion device 4302 is added to the light source 4301 to drive the light source to move up and down, so as to adjust the length of the whole light path, thereby adjusting the focus of the sub-image projected onto the retina of the human eye.

Fig. 44 shows that the present embodiment projects sub-images with different focal points on the retina of a human eye by adding motion components, including a light source 4401, a polarizer 4402(s), a near-eye refractive component 4404, a reflective surface (not labeled), and a linear motion mirror 4403.

Fig. 44 is a view showing that a linear motion mirror 4403 is added to the light source 4401, and the linear motion mirror 4403 can move back and forth, so as to adjust the length of the whole optical path and play a role of adjusting the focus of the sub-image projected on the retina of the human eye.

Example 10

In the embodiment, two radial reflection units with different optical path lengths project two overlapped sub-images in the same area on the retina of a human eye, one sub-image is larger and provides a wide edge visual field, and the other sub-image is smaller and provides a central high-definition visual field, so that a near-to-eye display effect with wide edges and a clear center is provided.

Scheme 1

Fig. 45a to 45d are schematic structural diagrams of the present embodiment, which include a light source 45011, a light source 45012, a sub-image 45021, a sub-image 45022, a polarizer 4503(s), a reflective diopter member 45041, and a reflective diopter member 45042.

The embodiment provides a scheme for nesting large and small images.

As shown in fig. 45a, the light beams emitted from the light source 45011 and the light source 45012 have different polarization states, and the polarization states of the light beams are selected by different reflection channels, and are in contact with the reflection refractive member 45041 and the reflection refractive member 45042 with different focal lengths, so that the light beams can be simultaneously seen by the human eye after reflection refraction, but the images on the retina of the human eye have different sizes due to the different focal lengths of the two optical paths. As shown, a smaller sub-image 45022 and a larger sub-image 45021 are formed, respectively.

By the special arrangement of the images emitted from the

light sources

45011 and 45012, the sub-image 45021 and the sub-image 45022 can be exactly overlapped in the joint area, and therefore the boundary between the center screen and the edge screen can be made invisible to the user. Since the sub-image 45022 has a smaller visual range, the definition is higher, which is consistent with the higher resolution of the central vision of human eyes.

In particular, with the scheme of fig. 45c, the effect of nesting the large and small images can be achieved through different arrangements of the polarizing plates.

Specifically, with the solution of fig. 45d, the reflective diopter 45041 is embedded in the center of the reflective diopter 45042, and through the arrangement of the corresponding polarizer, the light emitted from the light source 45011 will only be reflected by the reflective diopter 45041, and the light emitted from the light source 45012 will only be reflected by the reflective diopter 45042, so as to isolate the light path, and achieve the effect of nesting the large and small images.

In addition to the polarizing plate, a combination of the polarizing plate and the polarization splitting plate may be used to achieve the isolation of the optical path. And will not be described in detail herein.

In fig. 45a, 45c and 45d, if the device allows the external light to pass through but does not perform refraction treatment on the external light, the augmented reality transparent display effect can be realized. In this case, the light source 45011 and the light source 45012 may be disposed at right positions in the drawing, and light is emitted to the left, reflected, and directed downward.

Scheme 2

The embodiment proposes another scheme of image nesting in size.

In fig. 46a, a light ray emitted from the light source 46011 is reflected downward, then reflected outward by the semi-reflector 4602, and then refractively reflected by the reflective diopter member 4603 to become a virtual image having a light emitting position close to the light source 46012, so that the light ray emitted from the light source 46012 is refracted by the transmissive diopter member 4604 to become a light ray which can be seen by human eyes. Because the light from the light source 46011 undergoes two refractions of negative and positive focal lengths, the sub-images projected on the retina of the human eye are smaller and more sharply defined.

By moving the front and back positions of the reflective diopter members 4603, the focal position of the central sub-image near the retina of the human eye can be adjusted to achieve the display effect of different focal planes.

As shown in fig. 46b, the addition of two lenses, a negative focal length lens 4606 and a plano-concave lens 4607, in the optical path can increase the negative focal length diopter of the light emitted from the light source 46011. Meanwhile, the plano-convex lens 4605 is added, so that light from the light source 46012 or light transmitted from the outside is not refracted when passing through the plano-convex lens 4605 and the plano-concave lens 4607.

By moving the front and back positions of the plano-convex lens 4605, the reflective diopter member 4603 and the plano-concave lens 4607, the focal position of the central sub-image near the retina of the human eye can be adjusted, and the display effect of different focal planes can be realized.

As shown in fig. 46c, the light emitted from the light source 46011, after being reflected downward, passes through the half reflector 4602, is dioptric reflected by the reflective diopter member 4603, and is reflected by the half reflector 4602, becomes a virtual image having a light emitting position close to the light source 46012, and thus can be refracted together with the light emitted from the light source 46012 by the transmissive diopter member 4604, and becomes a light which can be seen by human eyes.

In fig. 46a to 46c, if the light source 46012 is a translucent display, it can allow external light to pass through. A transparent display effect of augmented reality can be achieved. The detailed description is omitted.

Scheme 3

The embodiment proposes another scheme of image nesting in size.

Fig. 47a to 47c show a specific structure diagram of the present embodiment, which includes a light source 47011, a light source 47012, a polarizing plate 4702 (several), a transmissive diopter member 4703, a transmissive diopter member 4704, a transmissive diopter member 4705, and a reflecting mirror 4706.

As shown in fig. 47a, a transmissive diopter member 4703 is mounted in the center of the transmissive diopter member 4704. The light emitted by the light source 47011 is polarized, reflected downward and reflected outward, and due to the polarization selectivity, the light can only penetrate into the human eye through the transmission diopter member 4703 and cannot penetrate through the transmission diopter member 4704; the light from the light source 47012 is polarized and then only passes through the transmissive diopter member 4704 and not through the transmissive diopter member 4703. Because the final optical path lengths of the light rays emitted by the two light sources are different, and the focal lengths of the two transmission type refraction parts are also different, the sizes of two sub-images are different, one smaller sub-image is positioned at the center and is clearer, and the other larger sub-image occupies the periphery and is more fuzzy.

In the arrangement of fig. 47b, a transmissive diopter 4705 (which may be of positive or negative focal length) is added to further adjust the projection path of the central sub-image. Specifically, by moving the up and down positions of the transmission diopter member 4705, the focal position of the central sub-image near the retina of the human eye can be adjusted to realize the display effect of different focal planes.

In the arrangement of fig. 47c, mirror 4706 is added to further increase the projected optical path length of the central sub-image, so that a smaller, sharper image can be obtained. In particular, by moving the front and back positions of the reflector 4706, the focal position of the central sub-image near the retina of the human eye can be adjusted, thereby realizing the display effect of different focal planes.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims

1. A thin type large-field-angle near-eye display device comprises two or more radial reflection units, wherein the radial reflection units are arranged in front of human eyes to generate two or more sub-images which are spliced into a uniform image on retinas of the human eyes,

the radial reflection unit is a multi-reflection radial reflection unit, and light rays emitted by the light source are reflected twice or more than twice in the process of being reflected into final emergent light rays and finally emitted into human eyes;

the plurality of radial reflecting units project light rays from different directions, and the plurality of radial reflecting units are mutually overlapped in each direction;

a plurality of specific polaroids are arranged among the multiple reflection radial reflection units, among the multiple reflection radial reflection units and the light source, and among the multiple reflection radial reflection units and the near-eye dioptric part;

the specific polarizing plate comprises an elliptical polarizing plate, a circular polarizing plate or a linear polarizing plate;

each radial reflection unit projects an independent sub-image which is spliced into a complete image on the retina of a human eye.

2. A near-to-eye display device according to claim 1 wherein the radially reflecting unit comprises a light source, a reflective surface, a transmissive diopter and/or a reflective optical component,

3. The near-eye display device of claim 1 wherein the multi-reflective radial reflection unit comprises a multi-reflective structure,

the multiple reflection structure includes a plurality of reflection surfaces.

4. The near-to-eye display device of claim 2 wherein the plurality of radial reflective elements project respective sub-images laterally from different directions to be stitched into a complete image on a retina of a human eye.

5. The near-to-eye display device of claim 4 wherein the two radial reflection units project sub-images from both the top and bottom directions and are spliced into a complete image on the retina of a human eye.

6. The near-eye display device of claim 4 wherein the three or more radial reflective elements have reflective surfaces with a configuration selected from the group consisting of pyramidal, turbo, and wave.

7. The near-to-eye display device of claim 2 wherein the plurality of radial reflective elements project respective sub-images laterally from the same direction, and are stitched into a complete image on a retina of a human eye.

8. The near-eye display device of claim 2, wherein the plurality of radial reflection units project the sub-images laterally from the same direction, each radial reflection unit is provided with an independent light source, or the plurality of radial reflection units share the same light source, a plurality of exit windows are formed by the light controller, only one exit window is opened in each time period to allow the light to be emitted, the plurality of radial reflection units project different sub-images alternately in different time periods, and each time period is extremely short, so that the human eye can simultaneously sense the plurality of sub-images.

9. The near-eye display device of claim 7 wherein the light controller comprises a transmissive light valve or a reflective light valve.

10. The near-eye display device of claim 2, further comprising a compensation diopter member having a focal length opposite to that of the near-eye diopter member, wherein the focal length of the compensation diopter member and the focal length of the near-eye diopter member cancel each other to allow the human eye to see external light, thereby realizing a transparent display effect of augmented reality.

11. The near-eye display device of claim 2, further comprising a moving component for adjusting an optical path length of the radial reflection unit to project sub-images of different focal points on a retina of a human eye.

12. The near-eye display device of claim 2 wherein the two radial reflective elements having different optical path lengths project two overlapping sub-images on the same area of the human eye retina, one sub-image being larger to provide a wide peripheral field of view and one sub-image being smaller to provide a central high definition field of view, thereby providing a wide peripheral and central near-eye display effect.

13. A near-eye display device as claimed in claim 7 wherein the light controller comprises a controllable mirror or an array of rotating mirrors.

14. A near-eye display device as claimed in claim 3 wherein the multi-reflecting structure comprises a plurality of reflecting surfaces and an even-order transmitter.

15. A near-eye display device as claimed in claim 3 wherein the multi-reflecting structure comprises a reflective surface, a polarization-altering reflector and a polarization transmitter.