WO2019157987A1

WO2019157987A1 - Monocular large field-of-view near-eye display device and binocular large field-of-view near-eye display device

Info

Publication number: WO2019157987A1
Application number: PCT/CN2019/074428
Authority: WO
Inventors: 周旭东; 宋海涛
Original assignee: 成都理想境界科技有限公司
Priority date: 2018-02-13
Filing date: 2019-02-01
Publication date: 2019-08-22
Also published as: CN108803022A

Abstract

A monocular large field-of-view near-eye display device, comprising at least two image source display systems (1), eyepiece optical systems (2) provided in a one-to-one correspondence to the image source display systems (1), and a near-eye display optical system (3). Image lights emitted by the image source display systems (1) are processed by the corresponding eyepiece optical systems (2) and then shone into the near-eye display optical system (3). The image lights are emitted by the near-eye display optical system (3) and then shone into either eye of an observer. Images formed by the image lights of the image source display systems (1) when emitted by the near-eye display optical system (3) are tiled with each other to form one complete image. Hence, each of the image source display systems (1) is respectively used for displaying a partial image of one entire image, and multiple partial images are ultimately tiled to constitute a complete overall image, thus increasing the monocular field-of-view of the device.

Description

Single-eye large field of view near-eye display device and binocular large field of view near-eye display device

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. CN201810149439.9, filed on Feb. 13, 2018, entitled "Single-eye large-field near-eye display device and binocular large-field near-eye display device", the entire contents of which are incorporated by reference. The references are incorporated herein.

Technical field

The present invention relates to the field of augmented reality display device technology, and more particularly to a large field of view near-eye display device.

Background technique

The existing augmented reality display system should comprehensively consider display resolution, field of view angle, volume and weight, display effect, human eye observation comfort, etc., especially the current solution is difficult to achieve large field of view display, existing for headwear The augmented reality display device typically has an angle of view of 14-34 degrees, which is far from meeting the needs of the consumer market.

Summary of the invention

The embodiment of the invention provides a large field of view near-eye display device, which realizes near-eye display of a large field of view by means of splicing.

In order to achieve the above object, the present invention provides a monocular large field of view near-eye display device including at least two image source display systems, an eyepiece optical system and a near-eye display optical system disposed in one-to-one correspondence with the image source display system. The image light emitted by each image source display system is processed by the corresponding eyepiece optical system and injected into the near-eye display optical system, and the image light is emitted from the near-eye display optical system and then incident on the observer's single eye, and each of the image source display systems The images formed by the near-eye display optical system are spliced together to form a complete image.

Thus, each image source display system is used for image display within a certain range of viewing angles, and the monocular field of view of the device is increased by image stitching.

The light of the real world passes through the near-eye display optical system and enters the observer's single eye. Therefore, the present invention can be applied to an augmented reality display device, and the image formed by the splicing is superimposed on the real world, thereby achieving the technical effect of enhancing the field of view of the enhanced display device.

The image source display system can be any of a digital light processing (DLP) display, a liquid crystal on silicon (LCOS) display, an LCD display, an OLED display, a fiber optic scanning display, and a MEMS scanning image display system.

The near-eye display optical system is any one, two or more of a plate diffraction optical waveguide, an array geometric optical waveguide, or a free-form optical waveguide.

Further, the near-eye display optical system is a plate-diffracted optical waveguide, and the plate-diffracted optical waveguide is provided with a light-incident portion corresponding to the eyepiece optical system, and each light-incident portion of the plate-diffracted optical waveguide is provided with a coupling grating, the plate diffraction optical waveguide is further provided with a coupling-out grating corresponding to the coupling grating, wherein the coupling grating is used to couple the beam emitted from the eyepiece optical system into the plate diffraction optical waveguide, so that the beam satisfies the plate The internal total reflection condition of the diffractive optical waveguide, the decoupling grating corresponding to each of the coupling gratings causes the beam to be emitted from the plate diffractive optical waveguide without satisfying the internal total reflection condition of the plate diffractive optical waveguide, and each of the coupling-out gratings is disposed adjacent to each other So that the edges of the image reflected by each of the coupled gratings are spliced to form a complete image. Optionally, the coupling grating is configured to reflect a beam of light incident into the plate diffraction optical waveguide such that the beam satisfies an internal total reflection condition of the plate diffraction optical waveguide; and the coupled grating is reflected by the corresponding coupling grating by reflection The light beam totally reflected in the plate diffraction optical waveguide is caused to emit from the plate diffraction optical waveguide without satisfying the internal total reflection condition of the plate diffraction optical waveguide.

Further optionally, the near-eye display optical system is an array geometric optical waveguide, and the array geometric optical waveguide is provided with a light-incident portion corresponding to the eyepiece optical system, and each of the light-introducing portions of the array geometric optical waveguide is provided with a coupling The reflecting portion, the array geometrical optical waveguide is further provided with a coupling out reflection portion corresponding to the coupling reflection portion, wherein the coupling reflection portion is used for reflecting the light beam incident on the array geometric optical waveguide, so that the light beam satisfies the array geometry The internal total reflection condition of the optical waveguide; the coupling out reflection portion each reflects a beam totally reflected by the corresponding coupling reflection portion and totally reflected in the array geometric optical waveguide, so that the beam does not satisfy the internal total reflection condition of the array geometric optical waveguide And from the array geometrical optical waveguide, each of the coupling out reflection parts is disposed in close proximity, so that the edges of the images reflected by the respective reflection and reflection parts are spliced to form a complete image.

Preferably, the near-eye display optical system includes a horizontally extending waveguide and a vertically extending waveguide, and a beam emitted through the eyepiece optical system is expanded in a horizontal direction through the horizontal expansion waveguide, and then vertically extended through the vertical extension waveguide. After the beam is expanded, the vertical extension waveguide is emitted and is incident on the observer's single eye.

Therefore, since the image light emitted by the image source display system passes through the horizontally extending waveguide and the vertically expanding waveguide, the image light is expanded in both the vertical direction and the horizontal direction, thereby expanding the pupil diameter of the near-eye display.

The horizontally extending waveguide and the vertically extending waveguide may each be any one of a plate diffraction optical waveguide, an array geometric optical waveguide, or a free-form optical waveguide.

Further, the horizontally-expanded waveguide or the vertically-expanded waveguide is a slab-diffracted optical waveguide, and the slab-diffracted optical waveguide is provided with a light-incident portion corresponding to the eyepiece optical system, and each of the light-receiving portions of the slab-diffracted optical waveguide A coupling grating is disposed, and the plate diffraction optical waveguide is further provided with a coupling-out grating corresponding to the coupling grating, and the coupling grating is used for reflecting the light beam incident on the plate diffraction optical waveguide, so that the beam satisfies the plate diffraction An internal total reflection condition of the optical waveguide; the coupled-out gratings each reflect a beam totally reflected by the corresponding coupling grating and reflected in the plate-diffracted optical waveguide such that the beam does not satisfy the internal total reflection condition of the plate-diffracted optical waveguide The plate diffraction optical waveguide is emitted, and each of the coupling-out gratings is disposed adjacent to each other, so that edges of the images reflected by the coupling-out gratings are spliced to form a complete image; each of the coupling-out gratings includes a plurality of sequentially arranged along the optical path. The grating body realizes beam expansion by adjusting the diffraction efficiency of each grating body and ensures uniformity of brightness of the expanded pupil. Expanding device can be realized the effect of the diameter of the exit pupil.

Further optionally, the horizontally extending waveguide or the vertically extending waveguide is an array geometric optical waveguide, and the array geometric optical waveguide is provided with a light incident portion corresponding to the eyepiece optical system, and each light incident portion of the array geometric optical waveguide is Provided with a coupling reflection portion, the array geometrical optical waveguide is further provided with a coupling-out reflection portion corresponding to the coupling reflection portion, and the coupling reflection portion is used for reflecting the light beam incident on the array geometric optical waveguide, so that the light beam satisfies The internal total reflection condition of the array geometry optical waveguide; the coupling out reflection portion each reflects the light beam reflected by the corresponding coupling reflection portion and totally reflected in the array geometric optical waveguide, so that the light beam does not satisfy the interior of the array geometric optical waveguide The total reflection condition is emitted from the array geometrical optical waveguide, and each of the coupling-out reflection portions is disposed in close proximity, so that the edges of the images reflected by the respective coupling-out reflection portions are spliced to form a complete image; each of the coupled-out reflection portions Each includes a plurality of reverse permeable membrane layers disposed along the optical path, and the light is transmitted to the reverse permeable membrane layer after entering the array geometric optical waveguide a portion of the light will be reflected on the anti-permeable membrane layer, exiting the array geometry optical waveguide, and another portion of the light will be transmitted through the reverse permeable membrane layer to the next reverse permeable membrane layer, and so on. Achieve the effect of expanding the exit diameter of the device.

In order to ensure the uniformity of the brightness, the reflection efficiency of each of the anti-permeable layers can be set according to the actual situation. For example, the array geometric optical waveguide includes five reversible film layers as an example, and the waveguide is horizontally expanded according to the light. In the transmission direction, the reflectance of the first anti-permeable layer can be set to 20%, the reflectivity of the second anti-permeable layer can be set to 25%, and the third can be reversed. The reflectance of the film layer is set to 33%, the reflectance of the fourth anti-permeable layer is set to 50%, and the reflectance of the fifth anti-permeable layer is set to 100%, thus, each The brightness of the light transmissive film layer is 20% of the total brightness.

The image source display system and the corresponding eyepiece optical system may be disposed on the observer's eye side of the near-eye display optical system, or may be disposed on the opposite side of the human eye of the near-eye display optical system, or may be different image sources. The display system and the corresponding eyepiece optical system are respectively disposed on both sides of the near-eye display optical system.

The partial images displayed by the at least two image source display systems may be horizontally stitched and/or vertically stitched. The image source display system can be two, three or more. For example, for any two horizontally stitched image source display partial images displayed by the system, wherein one image source display system displays a partial image with a horizontal field of view angle of a°-b°, and another image source displays a partial image displayed by the system. The horizontal field of view angle is b°-c° or d°-a°, then the horizontal image field angle of the horizontal image of the partial image displayed by the two image source display systems is a°-c° or d° -b°. For another example, for any two vertically spliced image source display partial images displayed by the system, wherein one image source display system displays a partial image with a vertical field of view angle of a°-b°, and another image source displays a portion of the system display. The vertical field of view of the image is b°-c° or d°-a°, then the vertical field of view of the image after vertical image stitching of the partial image displayed by the two image source display systems is a°-c° or d °-b°.

Another aspect of the present invention provides a binocular large field of view near-eye display device including a left-eye large field of view near-eye display device and a right-eye large field of view near-eye display device, said left-eye large field of view near-eye display device and The right-eye large-field near-eye display device is the single-eye large-field near-eye display device.

One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

Each of the image source display systems is respectively configured to display a partial image of an overall image, and finally a plurality of partial image stitches constitute a complete overall image, thereby increasing a monocular field of view of the device.

DRAWINGS

The invention is described in more detail hereinafter with reference to the accompanying drawings. among them:

1 is a schematic structural view of a monocular large field of view near-eye display device of the present invention;

2 is a schematic structural view of a monocular large field of view near-eye display device using a plate diffraction optical waveguide;

3 is a schematic structural view of a monocular large field of view near-eye display device using an array geometric optical waveguide;

4 is a schematic structural view of a monocular large field of view near-eye display device having a horizontally extending waveguide and a vertically expanding waveguide;

Figure 5 is a schematic structural view of a near-eye display optical system;

6 is a schematic diagram of imaging of a single-eye large field of view near-eye display device;

7 is another schematic structural view of a near-eye display optical system;

Figure 8 is a third structural schematic view of the near-eye display optical system;

9 is a schematic view showing the structure of an optical waveguide component of a binocular large field of view near-eye display device of the present invention.

In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to scale.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the invention provides a monocular large field of view near-eye display device, which realizes near-eye display of a large field of view by means of splicing.

A first aspect of the present invention provides a monocular large field of view near-eye display device, as shown in FIG. 1 , which includes at least two image source display systems 1 and eyepiece optics disposed one-to-one corresponding to the image source display system 1 . The system 2 and the near-eye display optical system 3, the image light emitted by each image source display system 1 is processed by the corresponding eyepiece optical system 2 and injected into the near-eye display optical system 3, and the image light is emitted from the near-eye display optical system 3 and then injected. The viewer is monocular, and the images formed by the image source display system 1 of each of the image source systems 1 are spliced together by the near-eye display optical system 3 to form a complete image.

Thus, each image source display system 1 is used for image display within a certain range of viewing angles, and the monocular field of view of the device is increased by image stitching.

The light of the real world passes through the near-eye display optical system 3 and enters the observer's single eye. Therefore, the present invention can be applied to an augmented reality display device, and the image formed by the splicing is superimposed on the real world, thereby achieving the technical effect of enhancing the field of view of the enhanced display device.

The image source display system 1 can be any of a digital light processing (DLP) display, a liquid crystal on silicon (LCOS) display, an LCD display, an OLED display, a fiber optic scanning display, and a MEMS scanning image display system.

The near-eye display optical system 3 is any one, two or more of a plate diffraction optical waveguide, an array geometric optical waveguide, or a free-form optical waveguide.

In some embodiments of the present invention, as shown in FIG. 1, the near-eye display optical system is a plate-diffracted optical waveguide 311, and the plate-diffracted optical waveguide 311 is provided with a light-incident portion corresponding to the eyepiece optical system, and the plate diffraction Each of the light incident portions of the optical waveguide 311 is provided with a coupling grating 312. The flat plate diffraction optical waveguide 311 is further provided with a coupling-out grating 313 corresponding to the coupling grating 312. The coupling grating 312 is used for the eyepiece optical system 2 The outgoing beam is coupled into the plate diffractive optical waveguide 311 such that the beam satisfies the internal total reflection condition of the plate diffractive optical waveguide, and the coupling out grating 313 corresponding to each coupling grating is such that the beam does not satisfy the plate diffracted light. The internal total reflection conditions of the waveguide are emitted from the plate diffraction optical waveguide 311, and the respective coupling-out gratings 313 are disposed in close proximity so that the edges of the images reflected by the respective coupling gratings 313 are spliced to form a complete image. Optionally, the coupling grating 312 is configured to reflect the light beam incident on the plate diffraction optical waveguide 311 such that the light beam satisfies the internal total reflection condition of the plate diffraction optical waveguide; the coupling out grating 313 is reflected by the corresponding coupling grating 312 by reflection. And the light beam totally reflected in the plate diffraction optical waveguide is caused to emit from the plate diffraction optical waveguide 311 without satisfying the internal total reflection condition of the plate diffraction optical waveguide.

Further preferably, as shown in FIG. 2, the plate diffractive optical waveguide includes a first monochromatic optical waveguide 321, a second monochromatic optical waveguide 322, and a third monochromatic optical waveguide 323 which are sequentially disposed along the optical path, The coupling gratings each include a first monochromatic coupling grating 324 disposed between the first monochromatic optical waveguide 321 and the second monochromatic optical waveguide 322 along the optical path, a second monochromatic optical waveguide 322 and a third monochromatic optical path along the optical path. a second monochromatic coupling grating 325 between the optical waveguides 323 and a third monochromatic coupling grating 326 disposed along the optical path on the rear side of the third monochromatic optical waveguide 323; the decoupling gratings are each disposed along the optical path at the first a first monochromatic coupling grating 327 between the monochromatic optical waveguide 321 and the second monochromatic optical waveguide 322, and a second single disposed between the second monochromatic optical waveguide 322 and the third monochromatic optical waveguide 323 along the optical path a color coupling out grating 328 and a third monochromatic coupling grating 329 disposed along the optical path on the rear side of the third monochromatic optical waveguide 323; the first monochromatic coupling grating 324 and the first monochromatic coupling grating 327 are both reflected a first monochromatic light and transmitting a second monochromatic beam and a third monochromatic beam, the second monochromatic coupling grating 325 and the second monochromatic out-coupling grating 328 both reflect the second monochromatic beam and transmit the first monochromatic beam and the third monochromatic beam, and the third monochromatic coupling grating 326 and the third monochromatic coupling grating 329 both reflect The three monochromatic beams transmit the first monochromatic beam and the second monochromatic beam. The first monochrome color, the second monochrome color, and the third monochrome color may be any one of R, G, and B colors, and each of the first monochrome color, the second monochrome color, and the third monochrome color Not the same. Taking the first monochromatic, the second monochromatic, and the third monochromatic as R, G, and B, respectively, the beam first enters the red optical waveguide, and the red beam is reflected by the red coupling grating 324 to reflect the R beam. The red light waveguide 321 is incident such that the R beam satisfies the internal total reflection condition of the red optical waveguide 321; the G beam and the B beam are emitted from the red coupling grating 324 and are incident on the green optical waveguide 322, and are reflected by the green coupling grating 325. After the G beam, the G beam is incident on the green optical waveguide 322 such that the G beam satisfies the internal total reflection condition of the green optical waveguide 322; the B beam is emitted from the green coupling grating 325 and is incident on the blue optical waveguide 323 via the blue coupling grating 326. The B beam in the beam is reflected and the B beam is incident on the green waveguide 322 such that the B beam satisfies the internal total reflection condition of the blue waveguide 323. The blue coupling out grating 329 reflects the B beam reflected by the blue coupling grating 326 and totally reflected in the blue optical waveguide 323 such that the B beam does not satisfy the internal total reflection condition of the blue optical waveguide 323 and is emitted from the blue optical waveguide 323. And in turn, through the green coupling out grating 328, the green optical waveguide 322, the red coupling out grating 327, and the red optical waveguide 321; the green coupling out grating 328 reflects the green coupling grating 325 and is totally reflected in the green optical waveguide 322. The G beam is such that the G beam does not satisfy the internal total reflection condition of the green optical waveguide 322 and is emitted from the green optical waveguide 322, and sequentially passes through the red coupling out grating 327 and the red optical waveguide 321; the red coupling out grating 327 reflects The R beam reflected by the red coupling grating 324 and totally reflected in the red optical waveguide 321 causes the R beam to be emitted from the red optical waveguide 321 without satisfying the internal total reflection condition of the red optical waveguide 321.

In other embodiments of the present invention, the near-eye display optical system is an array geometric optical waveguide 331. As shown in FIG. 3, the array geometric optical waveguide 331 is provided with a light-incident portion corresponding to the eyepiece optical system, and the array geometry Each of the light incident portions of the optical waveguide 331 is provided with a coupling reflection portion 332. The array geometric optical waveguide 331 is further provided with a coupling out reflection portion 333 corresponding to the coupling reflection portion 332. The coupling reflection portion 332 is used for reflection. The light beam incident on the array geometry optical waveguide 331 is such that the light beam satisfies the internal total reflection condition of the array geometrical optical waveguide; the coupling-out reflection portion 333 is reflected by the corresponding coupling reflection portion 332 by reflection and is completely within the array geometric optical waveguide. The reflected light beam is caused to emit from the array geometrical optical waveguide 331 without satisfying the internal total reflection condition of the array geometrical optical waveguide, and each of the coupling-out reflection portions 333 is disposed in close proximity, so that the respective coupling-out reflection portions 333 are reflected. The edges of the image are stitched together to form a complete image.

In some embodiments of the present invention, as shown in FIG. 4, the near-eye display optical system includes a horizontally extending waveguide 341 and a vertically extending waveguide 342, and a light beam emitted through the eyepiece optical system passes through the horizontally extending waveguide 341 in a horizontal direction. After the beam is expanded, the vertical expansion waveguide 342 is further expanded in the vertical direction, and then the vertical expansion waveguide 342 is emitted to enter the observer's single eye.

Therefore, since the image light emitted by the image source display system passes through the horizontally extending waveguide 341 and the vertical expanded waveguide 342, the image light is expanded in both the vertical direction and the horizontal direction, and the pupil diameter of the near-eye display is enlarged.

The horizontally extending waveguide 341 and the vertically extending waveguide 342 may each be any one of a plate diffraction optical waveguide, an array geometric optical waveguide, or a free-form optical waveguide.

Further, in some embodiments of the present invention, the horizontally-expanded waveguide or the vertically-expanded waveguide is a slab-diffracted optical waveguide. Referring to FIG. 1, the slab-diffracted optical waveguide is provided with a light-incident portion corresponding to the eyepiece optical system, and a flat plate. Each of the light-introducing portions of the diffractive optical waveguide is provided with a coupling grating 312. The flat-plate diffractive optical waveguide is further provided with a coupling-out grating 313 corresponding to the coupling grating 312, and the coupling grating 312 is used for reflecting the incident plate illuminating light. The beam of the waveguide is such that the beam satisfies the internal total reflection condition of the plate diffractive optical waveguide; the out-coupling grating 313 both reflects the beam reflected by the corresponding coupling grating 312 and totally reflected in the plate diffraction optical waveguide, so that the beam The internal light-receiving conditions of the plate-diffracted optical waveguide are not satisfied and are emitted from the plate-diffracted optical waveguide, and the respective coupling-out gratings 313 are disposed in close proximity, so that the edges of the images reflected by the respective coupling-out gratings 313 are spliced to form a complete image. Each of the coupled out gratings 313 includes a plurality of grating bodies arranged in sequence along the optical path, by adjusting the diffraction of each grating body The efficiency achieves beam expansion and ensures uniform brightness uniformity, thereby realizing the effect of expanding the exit diameter of the device.

Further preferably, referring to FIG. 2, the plate diffractive optical waveguide includes a first monochromatic optical waveguide 321, a second monochromatic optical waveguide 322 and a third monochromatic optical waveguide 323 which are sequentially disposed along an optical path, and the coupled grating Each includes a first monochromatic coupling grating 324 disposed between the first monochromatic optical waveguide 321 and the second monochromatic optical waveguide 322 along the optical path, and a second monochromatic optical waveguide 322 and a third monochromatic optical waveguide along the optical path. a second monochromatic coupling grating 325 between 323 and a third monochromatic coupling grating 326 disposed along the optical path on the rear side of the third monochromatic optical waveguide 323; the coupling-out gratings are each disposed along the optical path in the first monochrome a first monochromatic coupling grating 327 between the optical waveguide 321 and the second monochromatic optical waveguide 322, and a second monochromatic coupling disposed between the second monochromatic optical waveguide 322 and the third monochromatic optical waveguide 323 along the optical path a grating 328 and a third monochromatic coupling grating 329 disposed along the optical path on the rear side of the third monochromatic optical waveguide 323; the first monochromatic coupling grating 324 and the first monochromatic coupling grating 327 both reflect the first Monochromatic light and transmitting a second monochromatic beam and a third monochromatic beam, a second monochromatic coupling grating 325 And the second monochromatic coupling-out grating 328 both reflects the second monochromatic beam and transmits the first monochromatic beam and the third monochromatic beam, and the third monochromatic coupling grating 326 and the third monochromatic coupling-out grating 329 both reflect the third The monochromatic light beam transmits the first monochromatic beam and the second monochromatic beam, and the first monochromatic coupling grating 327, the second monochromatic coupling grating 328, and the third monochromatic coupling grating 329 each include a plurality of The grating body arranged in sequence along the optical path realizes the expansion of the grating by adjusting the diffraction efficiency of each grating body and ensures the uniformity of the brightness of the expanded pupil, thereby realizing the effect of expanding the exit pupil diameter of the device.

The first monochrome color, the second monochrome color, and the third monochrome color may be any one of R, G, and B colors, and each of the first monochrome color, the second monochrome color, and the third monochrome color Not the same.

Taking the first monochromatic, second monochromatic, and third monochromatic colors as R, G, and B, respectively, the light beam is first incident on the red optical waveguide 321, and the R-beam in the optical beam is reflected by the red coupling grating 324 and R is The beam is incident on the red optical waveguide 321 such that the R beam satisfies the internal total reflection condition of the red optical waveguide 321; the G beam and the B beam are emitted from the red coupling grating 324 and are incident on the green optical waveguide 322, which is reflected by the green coupling grating 325. After the G beam, the G beam is incident on the green optical waveguide 322 such that the G beam satisfies the internal total reflection condition of the green optical waveguide 322; the B beam is emitted from the green coupling grating 325 and is incident on the blue optical waveguide 323 via the blue coupling grating. 326 reflects the B beam in the beam and then injects the B beam into the green optical waveguide 322 such that the B beam satisfies the internal total reflection condition of the blue optical waveguide 323. The blue coupling out grating 329 reflects the B beam reflected by the blue coupling grating 326 and totally reflected in the blue optical waveguide 323 such that the B beam does not satisfy the internal total reflection condition of the blue optical waveguide 323 and is emitted from the blue optical waveguide 323. And in turn, through the green coupling out grating 328, the green optical waveguide 322, the red coupling out grating 327, and the red optical waveguide 321; the green coupling out grating 328 reflects the green coupling grating 325 and is totally reflected in the green optical waveguide 322. The G beam is such that the G beam does not satisfy the internal total reflection condition of the green optical waveguide 322 and is emitted from the green optical waveguide 322, and sequentially passes through the red coupling out grating 327 and the red optical waveguide 321; the red coupling out grating 327 reflects The R beam reflected by the red coupling grating 324 and totally reflected in the red optical waveguide 321 causes the R beam to be emitted from the red optical waveguide 321 without satisfying the internal total reflection condition of the red optical waveguide 321.

In other embodiments of the present invention, the horizontally extending waveguide or the vertically expanding waveguide is an array geometric optical waveguide. Referring to FIG. 4, the array geometric optical waveguide is provided with a light-input portion corresponding to the eyepiece optical system, and an array. Each of the light-incident portions of the geometrical optical waveguide is provided with a coupling reflection portion 332. The array geometric optical waveguide is further provided with a coupling-out reflection portion 333 corresponding to the coupling reflection portion 332. The coupling reflection portion 332 is used for reflection. The light beam entering the array of geometric optical waveguides is such that the light beam satisfies the internal total reflection condition of the array of geometric optical waveguides; the coupled-out reflective portion 333 is reflected by the corresponding coupled reflection portion 332 by reflection and is totally reflected in the array geometrical optical waveguide. The light beam is such that the light beam does not satisfy the internal total reflection condition of the array geometrical optical waveguide and is emitted from the array geometric optical waveguide, and each of the coupling-out reflection portions 333 is disposed in close proximity, so that each of the coupling-out reflection portions 333 reflects the edge of the image. The splicing is performed to form a complete image; each of the coupling-out reflecting portions 333 includes a plurality of anti-permeable membrane layers arranged in sequence along the optical path, the light Upon entering the array geometry optical waveguide and passing it to the reverse permeable membrane layer, a portion of the light will be reflected on the reverse permeable membrane layer, exiting the array geometry optical waveguide, and another portion of the light will be transmitted through the reverse permeable membrane layer. The next anti-permeable membrane layer, and so on, can achieve the effect of expanding the exit pupil diameter of the device.

In the embodiment of the present invention, the image source display system and the corresponding eyepiece optical system may be disposed on the observer's eye side of the near-eye display optical system, as shown in FIG. 1 and FIG. 5; different image sources may also be displayed. The system and the corresponding eyepiece optical system are respectively disposed on both sides of the near-eye display optical system, as shown in FIG. 2; similarly, it can also be disposed on the opposite side of the human eye of the near-eye display optical system.

In the embodiment of the present invention, the image source display system may be two, three or more. Each of the image source display systems displays a partial image of an overall image, and finally a plurality of partial image mosaics form a complete overall image, thereby increasing the monocular field of view of the device. The partial images displayed by the at least two image source display systems may be horizontally stitched and/or vertically stitched. For example, for any two horizontally stitched image source display partial images displayed by the system, wherein one image source display system displays a partial image with a horizontal field of view angle of a°-b°, and another image source displays a partial image displayed by the system. The horizontal field of view angle is b°-c° or d°-a°, then the horizontal image field angle of the horizontal image of the partial image displayed by the two image source display systems is a°-c° or d° -b°. For another example, for any two vertically spliced image source display partial images displayed by the system, wherein one image source display system displays a partial image with a vertical field of view angle of a°-b°, and another image source displays a portion of the system display. The vertical field of view of the image is b°-c° or d°-a°, then the vertical field of view of the image after vertical image stitching of the partial image displayed by the two image source display systems is a°-c° or d °-b°.

For example, FIG. 5 shows a structure of a near-eye display optical system of an embodiment in which the number of image source display systems is two and two image source display systems display horizontal image stitching, wherein a partial image is transmitted through the near-eye display optical system. The angle of view of the field of view is from 0 degrees to the maximum field of view (eg 40°), and the other image is transmitted through the near-eye display optical system and the corresponding field of view is negative, the maximum field of view (eg -40°) to 0 degrees, Positive and negative only represent the corresponding direction, and the angle of view of 80° can be achieved by splicing. The final imaging diagram is shown in Fig. 6.

FIG. 7 shows a structure of a near-eye display optical system of an embodiment in which the number of image source display systems is four and the partial images displayed by the four image source display systems are matrix-spliced. This embodiment increases the horizontal field of view angle. Also increases the vertical field of view. FIG. 8 shows a structural diagram of a near-eye display optical system of an embodiment in which the number of image source display systems is four and the four image source display systems display horizontal image stitching, thereby increasing the horizontal angle of view.

As shown in the embodiment shown in FIG. 5 and FIG. 7 to FIG. 8, the near-eye display optical system in the present invention is an integrally formed optical waveguide component, and the corresponding waveguide is processed at a desired portion of the integrally formed optical waveguide component. The structure allows the near eye to display the functions required locally for the optical system.

Another aspect of the present invention provides a binocular large field of view near-eye display device including a left-eye large field of view near-eye display device and a right-eye large field of view near-eye display device, said left-eye large field of view near-eye display device and The right-eye large-field near-eye display device is the single-eye large-field near-eye display device. As shown in FIG. 9, a schematic structural view of an optical waveguide component in which a near-eye display optical system of a left-eye large-field near-eye display device and a near-eye display optical system of a right-eye large-field near-eye display device are integrated into one body is shown. .

It is to be noted that the above-described embodiments are illustrative of the invention and are not intended to be limiting, and that the invention may be devised without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as a limitation. The word "comprising" or "comprising" does not exclude the presence of the elements or the steps in the claims. The word "a" or "an" In the unit claims enumerating several means, several of these means can be embodied by the same hardware item. The use of the words first, second, third, etc. does not denote any order, and these words can be interpreted as names.

All of the features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner other than mutually exclusive features and/or steps.

Any feature disclosed in the specification, including any additional claims, abstract and drawings, may be replaced by other equivalents or alternative features, unless otherwise stated. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

The invention is not limited to the specific embodiments described above. The invention extends to any new feature or any new combination disclosed in this specification, as well as any novel method or process steps or any new combination disclosed.

Claims

a monocular large field of view near-eye display device, comprising: at least two image source display systems, an eyepiece optical system and a near-eye display optical system disposed in one-to-one correspondence with the image source display system, each image source display system The image light is processed by the corresponding eyepiece optical system and then injected into the near-eye display optical system. The image light is emitted from the near-eye display optical system and then incident on the observer's single eye, and the image light of each of the image source display systems is emitted by the near-eye display optical system. The resulting images are spliced to each other to form a complete image.
The monocular large field of view near-eye display device according to claim 1, wherein the image source display system is a DLP display, an LCOS display, an LCD display, an OLED display, a fiber scanning display, and a MEMS scanning image display system. Any of them.
The monocular large field of view near-eye display device according to claim 1, wherein the near-eye display optical system is any one or two of a plate diffraction optical waveguide, an array geometric optical waveguide or a free-form optical waveguide. Or a variety.
The monocular large field of view near-eye display device according to claim 3, wherein the near-eye display optical system is a plate-diffracted optical waveguide, and the plate-diffracted optical waveguide is provided with a light-incident portion corresponding to the eyepiece optical system. Each of the light-incident portions of the plate-diffractive optical waveguide is provided with a coupling grating, and the plate-diffracted optical waveguide is further provided with a coupling-out grating corresponding to the coupling grating, and the coupling grating is used to couple the beam emitted from the eyepiece optical system into The plate-diffracted optical waveguide is such that the light beam satisfies an internal total reflection condition of the plate-diffracted optical waveguide, and the coupled-out grating corresponding to each of the coupled gratings causes the light beam to not satisfy the internal total reflection condition of the plate-diffracted optical waveguide The plate diffraction optical waveguide is emitted, and each of the coupling-out gratings is disposed in close proximity.
The monocular large field of view near-eye display device according to claim 3, wherein the near-eye display optical system is an array geometric optical waveguide, and the array geometric optical waveguide is provided with a light-input portion corresponding to the eyepiece optical system. Each of the light-introducing portions of the array geometrical optical waveguide is provided with a coupling reflection portion, and the array geometric optical waveguide is further provided with a coupling-out reflection portion corresponding to the coupling reflection portion, and the coupling reflection portion is used for reflecting the injection array geometry. a beam of light of the optical waveguide such that the beam satisfies an internal total reflection condition of the array of geometric optical waveguides; the coupled-out reflectors each reflect a beam of light that is reflected by the corresponding coupled reflector and totally reflected within the array of geometrical optical waveguides, such that The light beam is emitted from the array geometrical optical waveguide without satisfying the internal total reflection condition of the array geometrical optical waveguide, and each of the coupled out reflection portions is disposed in close proximity.
A monocular large field of view near-eye display device according to claim 1, wherein said near-eye display optical system comprises a horizontally extending waveguide and a vertically expanding waveguide, and a beam emitted through the eyepiece optical system passes through said horizontally extending waveguide at a level After the beam is expanded in the direction, the vertical expansion waveguide is further expanded in the vertical direction, and then the vertical expansion waveguide is emitted and incident on the observer's single eye.
The monocular large field of view near-eye display device according to claim 6, wherein the horizontally extending waveguide and the vertically expanding waveguide are each one of a plate diffraction optical waveguide, an array geometric optical waveguide, or a free-form optical waveguide. Kind.
The monocular large field of view near-eye display device according to claim 7, wherein the horizontally-expanded waveguide or the vertically-expanded waveguide is a plate-diffracted optical waveguide, and the plate-diffracted optical waveguide is provided with a one-to-one correspondence with the eyepiece optical system. In the light portion, each of the light-incident portions of the plate-diffractive optical waveguide is provided with a coupling grating, and the plate-diffracted optical waveguide is further provided with a coupling-out grating corresponding to the coupling grating, and the coupling grating is used for reflecting the incident plate illuminating light. The beam of the waveguide is such that the beam satisfies the internal total reflection condition of the plate-diffracted optical waveguide; the coupled-out grating reflects the beam totally reflected by the corresponding coupled grating and reflected in the plate-diffracted optical waveguide, so that the beam is not satisfied The internal diffraction condition of the plate diffractive optical waveguide is emitted from the plate diffraction optical waveguide, and each of the coupling-out gratings is disposed adjacent to each other, and each of the coupling-out gratings includes a plurality of grating bodies arranged in sequence along the optical path, by adjusting each grating The diffraction efficiency of the bulk achieves beam expansion and ensures uniform brightness uniformity.
The monocular large field of view near-eye display device according to claim 7, wherein the horizontally extending waveguide or the vertically expanding waveguide is an array geometric optical waveguide, and the array geometric optical waveguide is provided with a one-to-one correspondence with the eyepiece optical system. Each of the light incident portions of the array geometrical optical waveguide is provided with a coupling reflection portion, and the array geometric optical waveguide is further provided with a coupling reflection portion corresponding to the coupling reflection portion, and the coupling reflection portion is used for the reflection Passing into the beam of the array of geometric optical waveguides, such that the beam satisfies the internal total reflection condition of the array of geometric optical waveguides; the coupled-out reflectors are each reflected by a beam reflected by the corresponding coupled reflector and totally reflected within the array of geometric optical waveguides, The light beam is emitted from the array geometrical optical waveguide without satisfying the internal total reflection condition of the array geometrical optical waveguide, and each of the coupled out reflection portions is disposed in close proximity; each of the coupled out reflection portions includes a plurality of sequentially arranged along the optical path. The anti-permeable membrane layer, when the light is transmitted to the reflective optically permeable layer after entering the array geometrical optical waveguide, a part of the light may be reversely permeable. Reflection occurs on the film layer, exiting the array geometry optical waveguide, and another portion of the light is transmitted through the reverse permeable film layer to the next reverse permeable film layer.
A binocular large field of view near-eye display device, comprising: a left eye large field of view near eye display device and a right eye large field of view near eye display device, said left eye large field of view near eye display device and right eye view The near-eye display device is a monocular large field of view near-eye display device according to any one of claims 1-9.