CN214252751U

CN214252751U - Near-to-eye display system

Info

Publication number: CN214252751U
Application number: CN202120284179.3U
Authority: CN
Inventors: 王景; 苏鹏华; 宋强; 黄浩; 马国斌
Original assignee: Long Optoelectronics Co Ltd
Current assignee: Long Optoelectronics Co Ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-09-21
Anticipated expiration: 2031-02-01

Abstract

The embodiment of the utility model provides a relate to optics technical field, in particular to near-to-eye display system. An embodiment of the present invention provides a near-to-eye display system, the near-to-eye display system includes: the display unit, first polarization beam splitter prism, first quarter wave plate, first reflection lens, second quarter wave plate, second reflection lens and optical waveguide, wherein, display unit and first polarization beam splitter prism set up along first optical axis, the laminating of first quarter wave plate sets up between first polarization beam splitter prism and first reflection lens, the laminating of second quarter wave plate sets up between first polarization beam splitter prism and second reflection lens, in this near-to-eye display system, fold the light path of the s light that carries image information through first polarization beam splitter prism, get into the optical waveguide by the exit end of first polarization beam splitter prism at last, it is visible, this system optical element is few, simple structure, further can reduce system's volume and weight.

Description

Near-to-eye display system

Technical Field

The embodiment of the utility model provides a relate to optics technical field, in particular to near-to-eye display system.

Background

Near-eye display systems, also known as head-mounted displays, originally originated in the field of air force, mainly to solve the problem of the great amount of information collected by the increasingly sophisticated instrumentation and weapons systems on board the aircraft, by means of which all the information of the instruments can be presented in the field of view in front of the pilot, concentrating his efforts on operating the aircraft and aiming. With the study and knowledge of people on near-eye display products, the application field of the near-eye display products is also continuously expanded. In the civil aspect, the method is mainly combined with related virtual technologies and applied to education and training; exhibition and promotion of commercial products; simulation training of medicine, etc.

However, in the existing near-eye display system, the number of optical elements generally used is large, and the system is complex, not easy to reduce the volume of the device and heavy in weight.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a main technical problem who solves provides a near-to-eye display system, and optical element figure is few, system complexity is low, easily alleviates device volume and quality.

In order to solve the above technical problem, the utility model discloses a technical scheme that embodiment adopted is: there is provided a near-eye display system comprising: a display unit for providing image information; the first polarization beam splitter prism comprises a first end, a second end, an incident end and an emergent end, the first polarization beam splitter prism and the display unit are arranged along a first optical axis, and reflected light emitted by the first polarization beam splitter prism is used for imaging; the first quarter-wave plate comprises a first surface and a second surface, and the first surface of the first quarter-wave plate is attached to the first end of the first polarization splitting prism; the first reflection lens comprises a transmission surface and a reflection surface, and the transmission surface of the first reflection lens is attached to the second surface of the first quarter-wave plate; the second quarter-wave plate comprises a first surface and a second surface, and the first surface of the second quarter-wave plate is attached to the second end of the first polarization splitting prism; the second reflection lens comprises a transmission surface and a reflection surface, and the transmission surface of the second reflection lens is attached to the second surface of the second quarter-wave plate; the first reflection lens, the first quarter-wave plate, the first polarization splitting prism, the second quarter-wave plate and the second reflection lens are arranged along a second optical axis, and the first optical axis and the second optical axis are perpendicular to each other; and the optical waveguide is arranged at the emergent end of the first polarization splitting prism.

In some embodiments, the near-eye display system further comprises a polarizer disposed between the display unit and the first polarization splitting prism along the first optical axis.

In some embodiments, the near-eye display system further comprises at least one imaging lens disposed between the display unit and the optical waveguide along the first optical axis, the imaging lens to shape light.

In some embodiments, the display unit is one of an LCD, an OLED, an LCOS, a DMD, and a Micro-LED.

In some embodiments, the at least one imaging lens comprises a first imaging lens and a second imaging lens; the first imaging lens and the second imaging lens are sequentially arranged between the polaroid and the first polarization splitting prism.

In some embodiments, the display unit is a reflective display unit, and the near-eye display system further comprises an illumination unit and a second polarization splitting prism arranged along a third optical axis; the third optical axis is perpendicular to the first optical axis; the lighting unit is used for providing a light source for the display unit; the second polarization beam splitter prism is arranged between the display unit and the polaroid along the first optical axis, and is used for reflecting the light source to the display unit and transmitting the light with the image information reflected by the display unit to the polaroid.

In some embodiments, the at least one imaging lens includes a third imaging lens, and the third imaging lens is attached to the incident end of the first polarization splitting prism.

In some embodiments, the near-eye display system further comprises a half-wave plate disposed between the second polarization splitting prism and the polarizer along the first optical axis.

In some embodiments, the at least one imaging lens further includes a fourth imaging lens, and the fourth imaging lens is attached to the exit end of the first polarization splitting prism.

In some embodiments, the illumination unit includes an LED light source, an illumination lens, a microlens array, and a diffuser; the LED light source, the illuminating lens, the micro lens array, the diffusion sheet and the second polarization splitting prism are sequentially arranged along the third optical axis.

In some embodiments, the first polarization splitting prism and the second polarization splitting prism are one of a film-coated type splitting prism, a metal wire grid type polarization splitting prism, and a wire grid type polarization splitting prism.

The utility model discloses embodiment's beneficial effect is: be different from the prior art's condition, the utility model discloses embodiment provides a near-to-eye display system, near-to-eye display system includes: the display unit, first polarization beam splitter prism, first quarter wave plate, first reflection lens, second quarter wave plate, second reflection lens and optical waveguide, wherein, display unit and first polarization beam splitter prism set up along first optical axis, the laminating of first quarter wave plate sets up between first polarization beam splitter prism and first reflection lens, the laminating of second quarter wave plate sets up between first polarization beam splitter prism and second reflection lens, in this near-to-eye display system, fold the light path of the s light that carries image information through first polarization beam splitter prism, get into the optical waveguide by the exit end of first polarization beam splitter prism at last, it is visible, this system optical element is few, simple structure, further can reduce system's volume and weight.

Drawings

One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.

Fig. 1 is a schematic structural diagram of a near-eye display system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the optical path of FIG. 1;

fig. 3 is a schematic structural diagram of another near-eye display system provided in an embodiment of the present invention;

FIG. 4 is a schematic diagram of the optical path of FIG. 3;

fig. 5 is a schematic structural diagram of another near-eye display system according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the optical path of FIG. 5;

fig. 7 is a schematic structural diagram of another near-eye display system according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that, if not conflicted, the various features of the embodiments of the invention can be combined with each other and are within the scope of protection of the present application. In addition, although the functional blocks are divided in the device diagram, in some cases, the blocks may be divided differently from those in the device. Further, the terms "first," "second," and the like, as used herein, do not limit the data and the execution order, but merely distinguish the same items or similar items having substantially the same functions and actions.

Referring to fig. 1, fig. 1 shows a near-eye display system according to an embodiment of the present invention, which includes a display unit 10, a first polarization splitting prism 21, a first quarter-wave plate 31, a first reflective lens 41, a second quarter-wave plate 32, a second reflective lens 42, and an optical waveguide 60. Wherein, the display unit 10 is used for providing image information; the first polarization beam splitter prism 21 comprises a first end, a second end, an incident end and an emergent end, the first polarization beam splitter prism 21 and the display unit 10 are arranged along a first optical axis, and reflected light emitted by the first polarization beam splitter prism 21 is used for imaging; the first quarter-wave plate 31 comprises a first surface and a second surface, and the first surface of the first quarter-wave plate 31 is attached to the first end of the first polarization splitting prism 21; the first reflection lens 41 includes a transmission surface and a reflection surface, and the transmission surface of the first reflection lens 41 is attached to the second surface of the first quarter-wave plate 31; the second quarter-wave plate 32 comprises a first surface and a second surface, and the first surface of the second quarter-wave plate 32 is attached to the second end of the first polarization splitting prism 21; the second reflection lens 42 comprises a transmission surface and a reflection surface, and the transmission surface of the second reflection lens 42 is attached to the second surface of the second quarter-wave plate 32; the first reflection lens 41, the first quarter-wave plate 31, the first polarization splitting prism 21, the second quarter-wave plate 32 and the second reflection lens 42 are sequentially arranged along a second optical axis, and the first optical axis and the second optical axis are perpendicular to each other; the optical waveguide 60 is provided at the exit end of the first polarization splitting prism 21.

Specifically, referring to fig. 2, the first polarization splitting prism 21 can transmit P-polarized light and reflect S-polarized light along the first optical axis, the display unit 10 can output S-polarized light, and reflective films with polarization maintaining characteristics are attached to the reflective surfaces of the first reflective lens 41 and the second reflective lens 42. In the embodiment of the utility model provides an in the near-to-eye display system, after S polarized light that display element 10 exported got into first polarization beam splitter prism 21, light reflected through first polarization beam splitter prism 21 through first quarter wave plate 31, after passing through the transmission face of first reflection lens 41 to the plane of reflection, the reflexion entered into first polarization beam splitter prism 21 through first quarter wave plate 31 again, at this moment, light passes through first quarter wave plate 31 twice, light becomes P polarized light by S polarized light; then, the light passes through the first polarization splitting prism 21, is transmitted to the second quarter wave plate 32, passes through the transmission surface of the second reflection lens 42, is reflected to the reflection surface, passes through the second quarter wave plate 32, and enters the first polarization splitting prism 21, at this time, the light passes through the second quarter wave plate 32 twice, the light is changed into S-polarized light from P-polarized light, and is finally coupled into the optical waveguide 60, and is totally reflected in the optical waveguide 60, and finally enters the human eye.

It is thus clear that, in the embodiment of the utility model provides an in the near-to-eye display system, can fold the light path through first polarization beam splitter prism 21, first quarter wave plate 31, first reflection lens 41, second quarter wave plate 32 and second reflection lens 42, the system complexity is low simultaneously, and the accessible designs the curvature of the transmission face of first reflection lens 41 and the transmission face of second reflection lens 42 and carries out the plastic to light, can reduce optical element's figure effectively, make things convenient for structural design, reduce near-to-eye display system's volume and weight effectively, further can make the more convenient helmet of being applied to of AR module show in the scene.

In order to further shape the light of the near-eye display system, in some embodiments, referring to fig. 3, the near-eye display system further includes at least one imaging lens 50, the imaging lens 50 is disposed between the display unit 10 and the optical waveguide 60 along the first optical axis, and the light of the near-eye display system can be shaped by designing the curvature of the imaging lens 50. In practical applications, the number and the position of the imaging lenses 50 may be set according to practical needs, and are not limited herein.

Specifically, the optical waveguide 60 may be one of a geometric array optical waveguide and a grating optical waveguide. In some embodiments, the optical waveguide 60 is a geometric array optical waveguide, which includes an entrance prism, and the entrance prism is disposed in the light-emitting direction of the S-polarized light of the first polarization splitting prism 21, at this time, the S-polarized light emitted from the first polarization splitting prism 21 can be coupled into the geometric array optical waveguide through the entrance prism, and finally reflected to the human eye through a selective transmission reflective film inside the optical waveguide. Alternatively, in some embodiments, the optical waveguide 60 is a grating optical waveguide, which includes an incoupling grating and an outcoupling grating, the incoupling grating is disposed in the light outgoing direction of the S-polarized light of the first polarization splitting prism 21, and can couple the S-polarized light into the optical waveguide 60, and finally can be outcoupled to the human eye in the working area of the outcoupling grating through the expansion and outcoupling of the outcoupling grating.

In some embodiments, the display unit 10 is one of an LCD, an OLED, an LCOS, a DMD, and a Micro-LED, and provides image information to output light for imaging. In some of these embodiments, the display unit 10 may directly output S-polarized light, for example, when the display unit 10 is an LCD, the correct voltage may be adjusted so that it outputs S-polarized light.

When the display unit 10 cannot directly output S-polarized light or output non-linearly polarized light, in some other embodiments, referring to fig. 3, the near-eye display system further includes a polarizer 70, and the polarizer 70 is disposed between the display unit 10 and the first polarization splitting prism 21 along the first optical axis, wherein the polarizer 70 is in the direction of P-polarized light, and is capable of filtering light emitted from the display unit 10, converting light emitted from the display unit 10 into P-polarized light, and filtering out stray light.

In some embodiments, the display unit 10 is a reflective display unit 10, and the image light source can be generated only when the illumination light is irradiated on the display unit 10, at this time, referring to fig. 5, the near-eye display system further includes an illumination unit 80 and a second polarization splitting prism 22 that are disposed along a third optical axis, where the third optical axis is perpendicular to the first optical axis, the illumination unit 80 is configured to provide an illumination light source for the display unit 10, the second polarization splitting prism 22 is disposed between the display unit 10 and the polarizer 70 along the first optical axis, at this time, the light source generated by the illumination unit 80 passes through the second polarization splitting prism 22, where S-polarized light is reflected to the display unit 10, the light carrying the image information of the display unit 10 is reflected to the second polarization splitting prism 22 in a P-polarized light form, and the second polarization splitting prism 22 transmits the P-polarized light to a subsequent optical element.

In some embodiments, referring to fig. 5, when the splitting plane of the first polarization splitting prism 21 is not parallel to the splitting plane of the second polarization splitting prism 22, the P-polarized light transmitted by the second polarization splitting prism 22 is S-polarized light relative to the first polarization splitting prism 21, and can directly enter the first polarization splitting prism 21 for transmission.

In other embodiments, when the splitting plane of the first polarization splitting prism 21 is parallel to the splitting plane of the second polarization splitting prism 22, referring to fig. 7, the near-eye display system further includes a half-wave plate 90, the half-wave plate 90 is disposed between the first polarization splitting prism 21 and the second polarization splitting prism 22 along the first optical axis, at this time, the P-polarized light transmitted by the second polarization splitting prism 22 is P-polarized light relative to the first polarization splitting prism, and therefore, the polarization state needs to be changed into S-polarized light through the half-wave plate 90, so that the S-polarized light can enter the first polarization splitting prism 21 for transmission.

In some embodiments, referring again to fig. 5, the illumination unit 80 includes an LED light source 81 and a diffuser unit; the LED light source 81, the diffusion unit, and the second polarization splitting prism 22 are sequentially disposed along the third optical axis. Specifically, referring to fig. 5 or fig. 7, the diffusion unit includes an illumination lens 82, a microlens array 83, and a diffusion sheet 84, and the LED light source 81, the illumination lens 82, the microlens array 83, the diffusion sheet 84, and the second polarization splitting prism 22 are sequentially disposed along the third optical axis. The LED light source 81 is used for generating LED illumination light, and the angle illumination lens 82, the micro lens array 83 and the diffusion sheet 84, which are used for diffusing the illumination light, can diffuse the illumination light at an angle, which is beneficial to improving the uniformity of illumination. Specifically, the LED light source 81 is a three-color integrated light source, or alternatively, a four-color integrated light source. In other embodiments, the diffusion unit may be a diffusion sheet or any other suitable diffusion device, and in practical applications, the illumination unit 80 and the diffusion unit may be disposed according to actual needs, and the limitation in this embodiment is not necessarily limited herein.

In some of the embodiments, the first polarization beam splitter prism 21 and the second polarization beam splitter prism 22 are wire grid type polarization beam splitter prisms or film coated type polarization beam splitter prisms. For example, a polarization splitting film may be plated on the splitting surfaces of the first polarization splitting prism 21 and the second polarization splitting prism 22, or a metal wire grid may be attached to the splitting surfaces of the first polarization splitting prism 21 and the second polarization splitting prism 22, or a glass wire grid may be etched.

In some embodiments, the first reflective lens 41, the second reflective lens 42 and the imaging lens 50 may be spherical lenses or aspheric lenses. Meanwhile, the first reflection lens 41, the second reflection lens 42, and the imaging lens 50 may be glass lenses or resin lenses.

The working process of the near-to-eye display system provided by the present invention is described in detail with reference to specific embodiments.

Example one

Referring to fig. 3, the near-eye display system in the present embodiment includes a display unit 10, a polarizer 70, a first imaging lens 51, a second imaging lens 52, and a first polarization splitting prism 21 sequentially disposed along a first optical axis, and a first reflection lens 41, a first quarter-wave plate 31, a first polarization splitting prism 21, a second quarter-wave plate 32, and a second reflection lens 42 sequentially disposed on a second optical axis; the display unit 10 is an OLED, a first surface of the first quarter-wave plate 31 is attached to the first end of the first polarization splitting prism 21, and a second surface is attached to the transmission surface of the first reflection lens 41; the first surface of the second quarter-wave plate 32 is attached to the second end of the first polarization splitting prism 21, and the second surface is attached to the transmission surface of the second reflection lens 42.

At this time, the OLED is an organic light emitting semiconductor which can self-emit light and can provide an image source for the near-eye display system, and thus, an illumination unit is not required in this embodiment. Specifically, referring to fig. 3 and 4, the light source generated by the OLED is unpolarized light, and is changed into S-polarized light after passing through the polarizer 70, and then passes through the first imaging lens 51 and the second imaging lens 52 and then is subjected to the first polarization splitting prism 21; the S polarized light passes through the first polarization beam splitter prism 21, then is reflected to the first quarter wave plate 31, enters the first reflection lens 41, is reflected to the first quarter wave plate 31 by the first reflection lens 41, and then passes through the first quarter wave plate 31 twice, so that the S polarized light is changed into the P polarized light; then, the P-polarized light passes through the first polarization splitting prism 21, enters the second reflection lens 42 through the second quarter wave plate 32, is reflected to the second quarter wave plate 32 by the second reflection lens 42, and then passes through the second quarter wave plate 32 twice, and is changed into S-polarized light from the P-polarized light, and finally, the S-polarized light exits from the exit end of the first polarization splitting prism 21, enters the optical waveguide 60, and finally can be received by human eyes.

Example two

Referring to fig. 5, in the present embodiment, the near-to-eye display system includes a first reflective lens 41, a first quarter-wave plate 31, a first polarization splitting prism 21, a second quarter-wave plate 32, and a second reflective lens 42 sequentially disposed along a second optical axis, and specific configurations thereof may refer to embodiment one and are not described herein; the near-eye display system further comprises an illumination unit 80, and a display unit 10, a second polarization splitting prism 22, a polarizing plate 70, a third imaging lens 53, a first polarization splitting prism 21 and a fourth imaging lens 54 which are sequentially arranged along the first optical axis; the third imaging lens 53 is attached to the incident end of the first polarization splitting prism 21, the fourth imaging lens 54 is attached to the emergent end of the first polarization splitting prism 21, the illumination unit 80 includes an LED light source 81, an illumination lens 82, a microlens array 83 and a diffusion sheet 84, the LED light source 81, the illumination lens 82, the microlens array 83, the diffusion sheet 84 and the second polarization splitting prism 22 are arranged along a third optical axis, and the splitting plane of the first polarization splitting prism 21 is not parallel to the splitting plane of the second polarization splitting prism 22.

In this case, the display unit 10 is an LCOS, which is a Liquid Crystal On Silicon (LCOS) display chip for providing an image source for the system, but due to its reflective principle, an illumination system is required in the near-eye display system. Specifically, referring to fig. 5 and fig. 6 in combination, when the light generated by the LED passes through the illumination lens 82, the microlens array 83, and the diffusion sheet 84 and is shaped into uniform light spots, the light passes through the second polarization splitting prism 22 and then reflects the S-polarized light onto the LCOS, the light carrying information content on the LCOS is reflected in the form of P-polarized light and passes through the second polarization splitting prism 22 and the polarizing plate 70, and at this time, the light is S-polarized light relative to the first polarization splitting prism 21, and then the light passes through the third imaging lens 53 and enters the first polarization splitting prism 21, and the light path direction in the first polarization splitting prism 21 can refer to the first embodiment, which is not described herein again, and finally, the light exits from the exit end of the first polarization splitting prism 21 and enters the light guide 60 through the fourth imaging lens 54.

Example three:

referring to fig. 7, in the present embodiment, the near-eye display system includes an illumination unit 80, and a display unit 10, a second polarization splitting prism 22, a polarizer 70, a third imaging lens 53, a first polarization splitting prism 21, and a first reflection lens 41, a first quarter-wave plate 31, a first polarization splitting prism 21, a second quarter-wave plate 32, and a second reflection lens 42, which are sequentially disposed along a first optical axis, and the specific configuration thereof may refer to embodiment two, which is not described herein. It should be noted that, at this time, since the splitting plane of the first polarization splitting prism 21 and the splitting plane of the second polarization splitting prism 22 are arranged in parallel, the near-eye display system further includes a half-wave plate 90, and the half-wave plate 90 is disposed between the polarizing plate 70 and the second polarization splitting prism 22.

At this time, the light generated by the LED light source 81 is shaped into a uniform light spot after passing through the illumination lens 82, the microlens array 83, and the diffusion sheet 84, and then passes through the second polarization splitting prism 22 to reflect the S-polarized light onto the LCOS, the light carrying information content on the LCOS is reflected in the form of P-polarized light and passes through the second polarization splitting prism 22, at this time, the light is P-polarized light relative to the first polarization splitting prism 21, and after passing through the half-wave plate 90, the light is changed from P-polarized light into S-polarized light, then enters the first polarization splitting prism 21 after passing through the third imaging lens 53, and finally, the light exits from the exit end of the first polarization splitting prism 21 and enters the optical waveguide 60 through the fourth imaging lens 54.

In summary, in the first aspect, the optical path of the s light carrying the image information can be folded through the first polarization splitting prism 21, the first quarter-wave plate 31, the first reflection lens 41, the second quarter-wave plate 32 and the second reflection lens 42, meanwhile, the system complexity is low, and the curvature of the transmission surface of the first reflection lens 41 and the curvature of the transmission surface of the second reflection lens 42 can be designed to shape the light, so that the number of optical elements can be effectively reduced, the structural design is convenient, in the second aspect, the imaging lens can be attached to the incident end or the emergent end of the first polarization splitting prism 21, and the optical path can be further effectively folded; in the third aspect, the light path of the illumination unit 80 is folded by the second polarization splitting prism 22, so that the volume and the mass of the system can be further effectively reduced, meanwhile, the illumination unit 80 can be freely arranged on two sides of the first optical axis, the vertical module form can be realized, the AR module can be more conveniently applied, the structure is simple, the design is easy, and the cost is lower. In practical applications, the number and the position of the imaging lenses can be set according to practical needs, and the limitations in the above embodiments are not limited herein.

An embodiment of the present invention provides a near-to-eye display system, the near-to-eye display system includes: the display unit, first polarization beam splitter prism, first quarter wave plate, first reflection lens, second quarter wave plate, second reflection lens and optical waveguide, wherein, display unit and first polarization beam splitter prism set up along first optical axis, the laminating of first quarter wave plate sets up between first polarization beam splitter prism and first reflection lens, the laminating of second quarter wave plate sets up between first polarization beam splitter prism and second reflection lens, in this near-to-eye display system, fold the light path of the s light that carries image information through first polarization beam splitter prism, get into the optical waveguide by the exit end of first polarization beam splitter prism at last, it is visible, this system optical element is few, simple structure, further can reduce system's volume and weight.

It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A near-eye display system, comprising:

a display unit for providing image information;

the first polarization beam splitter prism comprises a first end, a second end, an incident end and an emergent end, the first polarization beam splitter prism and the display unit are arranged along a first optical axis, and reflected light emitted by the first polarization beam splitter prism is used for imaging;

the first quarter-wave plate comprises a first surface and a second surface, and the first surface of the first quarter-wave plate is attached to the first end of the first polarization splitting prism;

the first reflection lens comprises a transmission surface and a reflection surface, and the transmission surface of the first reflection lens is attached to the second surface of the first quarter-wave plate;

the second quarter-wave plate comprises a first surface and a second surface, and the first surface of the second quarter-wave plate is attached to the second end of the first polarization splitting prism;

the second reflection lens comprises a transmission surface and a reflection surface, and the transmission surface of the second reflection lens is attached to the second surface of the second quarter-wave plate;

the first reflection lens, the first quarter-wave plate, the first polarization splitting prism, the second quarter-wave plate and the second reflection lens are arranged along a second optical axis, and the first optical axis and the second optical axis are perpendicular to each other;

and the optical waveguide is arranged at the emergent end of the first polarization splitting prism.

2. The near-eye display system of claim 1 further comprising a polarizer disposed between the display unit and the first polarization splitting prism along the first optical axis.

3. The near-eye display system of claim 2 further comprising at least one imaging lens disposed between the display unit and the optical waveguide along the first optical axis, the imaging lens for shaping light.

4. The near-eye display system of claim 3 wherein the display unit is one of an LCD, an OLED, an LCOS, a DMD, and a Micro-LED.

5. The near-eye display system of claim 4 wherein the at least one imaging lens comprises a first imaging lens and a second imaging lens; the first imaging lens and the second imaging lens are sequentially arranged between the polaroid and the first polarization splitting prism.

6. The near-eye display system of claim 4 wherein the display unit is a reflective display unit, the near-eye display system further comprising an illumination unit and a second polarizing beam splitter prism disposed along a third optical axis;

the third optical axis is perpendicular to the first optical axis;

the lighting unit is used for providing a light source for the display unit;

the second polarization beam splitter prism is arranged between the display unit and the polaroid along the first optical axis, and is used for reflecting the light source to the display unit and transmitting the light with the image information reflected by the display unit to the polaroid.

7. The near-eye display system of claim 6 wherein the at least one imaging lens comprises a third imaging lens conformingly disposed at the entrance end of the first polarizing beam splitter prism.

8. A near-eye display system as claimed in any one of claims 6 or 7, further comprising a half-wave plate disposed between the second polarization splitting prism and the polarizer along the first optical axis.

9. The near-eye display system of any one of claims 6 or 7 wherein the at least one imaging lens further comprises a fourth imaging lens disposed adjacent to the exit end of the first polarizing beam splitter prism.

10. The near-eye display system of claim 9 wherein the illumination unit comprises an LED light source, an illumination lens, a microlens array, and a diffuser; the LED light source, the illuminating lens, the micro lens array, the diffusion sheet and the second polarization splitting prism are sequentially arranged along the third optical axis.

11. The near-eye display system of claim 10 wherein the first polarizing beam splitter prism and the second polarizing beam splitter prism are one of a film coated beam splitter prism, a metal wire grid polarizing beam splitter prism, and a wire grid polarizing beam splitter prism.