CN115079416B

CN115079416B - Augmented reality glasses

Info

Publication number: CN115079416B
Application number: CN202210827910.1A
Authority: CN
Inventors: 廖仁伟
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2022-04-20
Filing date: 2022-07-14
Publication date: 2023-06-20
Anticipated expiration: 2042-07-14
Also published as: CN115079416A; TW202343074A; TWI803293B

Abstract

The invention discloses augmented reality glasses, which are used for being worn in front of eyes of a user. The image source is used for emitting an image beam. The collimating structure is disposed on the transmission path of the image beam to convert the image beam into a collimated beam. The lens group is arranged on the transmission path of the collimated light beam. The collimated light beam is converged at the focal point of the ocular lens by the lens group, is converted into a parallel light beam by the ocular lens, and is transmitted to eyes of a user.

Description

Augmented reality glasses

Technical Field

The present invention relates to optical devices, and more particularly to augmented reality glasses.

Background

With the progress of display technology, augmented reality (augmented reality) display technology is becoming popular, and is largely applied to aspects such as entertainment, medical surgery, etc. in people's life. Augmented reality technology allows a user to see not only a virtual image generated by image light, but also an actual object, and the virtual image can interact with the actual object.

However, since the pupil of the human eye has a certain size, the distances and angles between the different positions on the pupil and the object or image at which the pupil is looking are different, which causes the image to be faithfully imaged on the eye, and further causes other visual problems such as convergence adjustment conflicts.

Disclosure of Invention

The invention provides an augmented reality glasses, which faithfully presents images of an image source, and avoids problems such as image distortion, convergence adjustment conflict (VAC), and the like.

According to one embodiment of the present invention, an augmented reality glasses for wearing in front of both eyes of a user is provided, the augmented reality glasses including an image source, a collimating structure, a lens set, and an eyepiece. The image source is used for emitting an image beam. The collimating structure is disposed on the transmission path of the image beam to convert the image beam into a collimated beam. The lens group is arranged on the transmission path of the collimated light beam. The collimated light beam is converged at the object focus of the ocular lens by the lens group, is converted into a parallel light beam by the ocular lens, and is transmitted to at least one of the two eyes.

Wherein, this lens group is the field lens.

Wherein, the focal length of the eyepiece is larger than the focal length of the field lens.

Wherein, the clear aperture of the eyepiece is larger than the clear aperture of the field lens.

The collimating structure comprises a light blocking layer, a plurality of light holes are formed in the light blocking layer, and the light holes are arranged on the light blocking layer in an array mode.

Wherein the ratio of the height to the width of each light hole is greater than 20.

The image source comprises a display panel, and the width of each light hole is smaller than the minimum width of each sub-pixel of the display panel.

The image source comprises a display panel, and the ratio of the height of each light hole to the minimum width of each sub-pixel of the display panel is greater than 20.

The image source comprises a display panel, and the minimum distance between every two adjacent light holes is smaller than the minimum width of each sub-pixel of the display panel.

Wherein the object focal point of the eyepiece overlaps the focal plane of the lens group.

Based on the above, the augmented reality glasses provided by the embodiment of the invention convert the image beam into the collimated beam by using the collimating structure, and focus the collimated beam on the object focal point of the eyepiece by using the field lens to generate the parallel light of the incident eye, so as to avoid the situation that the image cannot be faithfully imaged on the eye due to different distances and angles between different positions on the pupil and the image source. Since the image can be faithfully transferred to the eye, vision problems, such as convergence adjustment conflicts, that often occur with augmented reality glasses are avoided.

In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

FIG. 1 is a schematic diagram of augmented reality glasses according to an embodiment of the present invention.

Fig. 2A and 2B are schematic views of a collimating structure according to an embodiment of the invention.

Wherein, the reference numerals:

100 augmented reality glasses

101 image source

102 collimation structure

103 lens group

104 ocular lens

BL light blocking layer

CL collimated Beam

D1, D2, D3 direction

EY eyes

F1, F2 focal length

H1 height of

IL image beam

P1 focal plane

PL parallel Beam

TH light hole

W1 width

W2 distance

Detailed Description

Referring to fig. 1, 2A and 2B. FIG. 1 illustrates augmented reality glasses according to an embodiment of the present invention. Fig. 2A is a plan view of a collimating structure according to an embodiment of the present invention, and fig. 2B is a cross-sectional view of the collimating structure taken along line AA' in fig. 2A. The augmented reality glasses 100 include an image source 101, a collimating structure 102, a lens set 103, and an eyepiece 104.

The image source 101 is used for emitting an image beam IL, and can be implemented as a micro-display. The micro display may be, for example, a self-luminous or non-self-luminous display such as a micro light emitting diode panel, a liquid crystal display, a liquid crystal on silicon display, or the like.

The collimating structure 102 is disposed on the transmission path of the image beam IL to convert the image beam IL into a collimated beam CL. The collimating structure 102 includes a light blocking layer BL disposed on a plane formed by the second direction D2 and the third direction D3. The light blocking layer BL is made of black light absorbing material and is provided with a plurality of light holes TH, retaining walls are arranged between adjacent light holes TH, and the light holes TH are arranged on the light blocking layer BL in an array mode. The image beam IL from the image source 101 is formed into a collimated beam CL after transmitting the collimating structure 102, the collimated beam CL being a plane wave traveling in a direction parallel to the first direction D1. The first direction D1, the second direction D2 and the third direction D3 are perpendicular to each other.

The lens group 103 includes at least one lens and is disposed on a transmission path of the collimated light beam CL (fig. 1 shows the lens group 103 as one lens, but the lens group 103 may include a plurality of lenses). In the present embodiment, the lens group 103 is a field lens (field lens) provided to expand the field of view. The image information of the image source 101 is subjected to fourier transformation (Fourier Transform) by the lens assembly 103, and a fourier transformation plane is formed at the focal plane P1 of the lens assembly 103. Since the collimated light beam CL is a plane wave, it is transmitted through the lens group 103 and then converged at the focal plane P1 of the lens group 103.

Eyepiece 104 is configured to perform an inverse fourier transform on straight beam CL. The object focus of the eyepiece 104 is set to overlap with the focal plane P1 of the lens group 103, so that the collimated light beam CL converged at the focal plane P1 is emitted from the object focus of the eyepiece 104. Thus, the collimated light beam CL is converted into a parallel light beam PL after transmitting the eyepiece 104, and the parallel light beam PL is incident on the eye EY.

It should be noted that the augmented reality glasses 100 according to the embodiment of the present invention uses the above-mentioned fourier transform and inverse fourier transform processes to faithfully transfer the image information of the image source 101 to the eye EY. Since the light beam incident on the eye EY is the parallel light beam PL, the situation that the image cannot be faithfully imaged on the eye EY due to the difference in distance and angle of the different positions on the pupil with respect to the image source 101 is avoided.

Referring also to fig. 1, in the present embodiment, the focal length F2 of the eyepiece 104 is further set to be greater than the focal length F1 of the lens group 103, and the Clear aperture (Clear aperture) of the eyepiece 104 is greater than the Clear aperture of the lens group 103 to expand the image light beam IL into a parallel light beam PL, which improves the visual range and expands the Eye box (Eye box). Specifically, in the existing augmented reality glasses, since the size of the light-transmitting plate (e.g., lens) is fixed, the larger the visual field, the smaller the field of view. The smaller the field of view, the larger the field of view. In contrast, in the augmented reality glasses 100 provided by the present invention, the field of view is optimized by the field lens, and the field of view is optimized due to the beam expanding process described above. That is, the augmented reality glasses 100 provided by the present invention can optimize the field of view and the visual range at the same time.

Referring to fig. 2A and 2B, in an embodiment of the invention, a ratio of a height H1 to a width W1 of the light hole TH is greater than 20 to effectively block the image beam IL traveling in the first direction D1, and retain the image beam IL traveling in the parallel first direction D1, so that the image beam IL (i.e., the collimated beam CL) after penetrating the collimating structure 102 has higher collimation.

In some embodiments of the present invention, the image source 101 is a display panel. And, the width W1 of the light hole TH of the collimating structure 102 is smaller than the minimum width of the sub-pixels of the display panel, so as to ensure that the collimated light beam CL has a high collimation. In some embodiments, the ratio of the height H1 of the light holes TH to the minimum width of the sub-pixels of the display panel is greater than 20. In some embodiments, the minimum distance W2 between every two adjacent light holes TH is smaller than the minimum width of each sub-pixel of the display panel, so as to ensure that the light holes TH are closely arranged and improve the light transmittance of the collimating structure 102.

In summary, the augmented reality glasses provided in the embodiments of the present invention convert an image beam into a collimated beam by using the collimating structure, and focus the collimated beam on the object focal point of the eyepiece by using the field lens to generate parallel light incident on the eye, so as to avoid the situation that the image cannot be faithfully imaged on the eye due to different distances and angles between different positions on the pupil and the image source. Since the image can be faithfully transferred to the eye, vision problems, such as convergence adjustment conflicts, that often occur with augmented reality glasses are avoided.

Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An augmented reality glasses for wearing in front of both eyes of a user, the augmented reality glasses comprising:

an image source for emitting an image beam;

the collimating structure is arranged on the transmission path of the image light beam to convert the image light beam into a collimated light beam; the collimation structure comprises a light blocking layer, a plurality of light holes and a plurality of light guide plates, wherein the light holes are arranged on the light blocking layer in an array mode;

the lens group is arranged on the transmission path of the collimated light beam; and

the collimating light beam is converged at the object focal point of the ocular lens by the lens group, is converted into parallel light beam by the ocular lens, and is transmitted to at least one of the two eyes.

2. The augmented reality glasses according to claim 1, wherein the lens set is a field lens.

3. The augmented reality glasses according to claim 2, wherein the focal length of the eyepiece is greater than the focal length of the field lens.

4. The augmented reality glasses according to claim 2, wherein the clear aperture of the eyepiece is greater than the clear aperture of the field lens.

5. The augmented reality glasses according to claim 1, wherein a ratio of a height to a width of each of the light-transmitting holes is greater than 20.

6. The augmented reality glasses according to claim 1, wherein the image source comprises a display panel and the width of each light aperture is smaller than the minimum width of each sub-pixel of the display panel.

7. The augmented reality glasses according to claim 1, wherein the image source comprises a display panel and a ratio of a height of each light-transmitting aperture to a minimum width of each sub-pixel of the display panel is greater than 20.

8. The augmented reality glasses according to claim 1, wherein the image source comprises a display panel and a minimum distance between every two adjacent light transmission holes is smaller than a minimum width of each sub-pixel of the display panel.

9. The augmented reality glasses according to claim 1, wherein the object focus of the eyepiece overlaps a focal plane of the lens set.