Single-side entrance pupil binocular waveguide and AR glasses

Abstract

The invention discloses a single-side entrance pupil binocular waveguide and AR glasses, and relates to the technical field of augmented reality, and the waveguide specifically comprises a waveguide substrate which is divided into a first substrate and a second substrate along a central axis; the first substrate is provided with an entrance pupil region, a first turning region, a first exit pupil region and a second turning region, the second substrate is provided with a second exit pupil region and a third turning region, and the entrance pupil region, the first turning region, the second turning region, the third turning region, the first exit pupil region and the second exit pupil region all form diffraction gratings; incident light enters through the entrance pupil region, passes through the first transition region, the second transition region and the third transition region and then exits from the second exit pupil region, so that a first optical waveguide path is formed. Wherein the second turning area is used for transferring light rays emitted to the outline notch from the first turning area to the third turning area. By adopting the method and the device, the technical effect that the single-side entrance pupil binocular waveguide can display complete image information in the non-light-source-side eyes of the wearer is achieved.

Description

Technical Field

[0001] The present application relates to the field of augmented reality technology, and in particular to a single-side entrance pupil binocular waveguide and AR glasses. Background Art

[0002] With the continuous development of AR (Augmented Reality) technology, AR glasses have become an indispensable device in the daily lives of more and more users.

[0003] In the related art, in order to reduce the weight and volume of AR glasses, technicians usually configure a single-pupil binocular waveguide on the AR glasses, so that the image light is diffracted through the waveguide base in the single-pupil binocular waveguide to the human eye, and then displayed as an image in the human eye.

[0004] However, when the image light is diffracted to the human eye on the non-light source side, it usually interferes with the wearer's nose bridge, causing part of the image light to be unable to be smoothly transmitted to the human eye on the non-light source side, thereby causing the image seen by the wearer to be defective, greatly reducing the wearing experience of AR glasses. Summary of the invention

[0005] The main purpose of the present application is to provide a single-side entrance pupil binocular waveguide, an image display method, a storage medium and a computer program product, aiming to solve the technical problem in the related art that the image light will interfere with the wearer's nose bridge during the diffraction process.

[0006] To achieve the above objectives, the present application proposes a single-sided entrance pupil binocular waveguide, wherein the single-sided entrance pupil binocular waveguide has a contour notch matching the wearer's nose bridge, and the single-sided entrance pupil binocular waveguide comprises:

[0007] A waveguide substrate, wherein the waveguide substrate is divided into a first substrate and a second substrate along a central axis;

[0008] The first substrate is provided with an entrance pupil area, a first turning area, a first exit pupil area, and a second turning area, and the second substrate is provided with a second exit pupil area and a third turning area, and the entrance pupil area, the first turning area, the second turning area, the third turning area, the first exit pupil area, and the second exit pupil area all form a diffraction grating;

[0009] The incident light enters through the entrance pupil area, passes through the first turning area, the second turning area, and the third turning area, and then exits from the second exit pupil area to form a first optical waveguide path;

[0010] The second turning zone is used to transfer the light emitted from the first turning zone to the contour gap to the third turning zone.

[0011] In one embodiment, a line from the center of the entrance pupil area to the first target point of the second turning area is higher than the first azimuth direction, and a line from the center of the entrance pupil area to the second target point of the second turning area is lower than the second azimuth direction;

[0012] The first target point is the highest point of the second turning zone in the vertical direction when the single-side entrance pupil binocular waveguide is in the wearing state, and the second target point is the lowest point of the second turning zone in the vertical direction when the single-side entrance pupil binocular waveguide is in the wearing state;

[0013] The first azimuth direction is the direction of a line from the center of the entrance pupil area to the top of the contour notch, and the second azimuth direction is the direction of the light closest to the vertical downward direction after the incident light is coupled when the single-sided entrance pupil binocular waveguide is worn.

[0014] In one embodiment, a vector sum of the grating vector of the entrance pupil region, the grating vector of the second turning region, the grating vector of the third turning region, and the grating vector of the second exit pupil region is zero.

[0015] In one embodiment, the second substrate is further provided with a fourth turning region forming a diffraction grating;

[0016] The incident light enters through the entrance pupil area, passes through the first turning area, the second turning area, the third turning area, and the fourth turning area, and then exits from the second exit pupil area to form the first optical waveguide path;

[0017] The vector sum of the grating vector of the entrance pupil area, the grating vector of the second turning area, the grating vector of the third turning area, the grating vector of the fourth turning area, and the grating vector of the second exit pupil area is zero.

[0018] In one embodiment, the incident light also enters through the entrance pupil area, passes through the first turning area and the fourth turning area, and then exits from the second exit pupil area to form a second optical waveguide path;

[0019] The vector sum of the grating vector of the entrance pupil area, the grating vector of the fourth turning area, and the grating vector of the second exit pupil area is zero.

[0020] In one embodiment, the incident light also enters through the entrance pupil area, passes through the first turning area, and then exits from the first exit pupil area to form a third optical waveguide path;

[0021] The vector sum of the grating vector of the entrance pupil area, the grating vector of the first turning area, and the grating vector of the first exit pupil area is zero.

[0022] In one embodiment, at least a portion of the third turning zone is located directly above the contour notch.

[0023] In one embodiment, the center of the first exit pupil area and the center of the second exit pupil area are symmetrically arranged along the central axis.

[0024] In one embodiment, the entrance pupil area is arranged on a side of the first substrate away from the second turning area, wherein a vertical distance from the center of the entrance pupil area to the central axis is greater than a vertical distance from the center of any area to the central axis.

[0025] In one embodiment, the grating vector of the entrance pupil region is parallel to the central axis;

[0026] The grating vector of the first turning zone, the grating vector of the second turning zone, and the grating vector of the third turning zone all form an angle with the central axis;

[0027] The grating vector of the first exit pupil area and the grating vector of the second exit pupil area are both perpendicular to the central axis.

[0028] In addition, to achieve the above objectives, the present application also proposes AR glasses, which include the single-sided entrance-pupil binocular waveguide as described above.

[0029] The single-side entrance pupil binocular waveguide provided in the embodiment of the present application has a contour notch matching the wearer's nose bridge, including: a waveguide substrate, the waveguide substrate is divided into a first substrate and a second substrate along the central axis; the first substrate is provided with an entrance pupil area, a first turning area, a first exit pupil area and a second turning area, the second substrate is provided with a second exit pupil area and a third turning area, the entrance pupil area, the first turning area, the second turning area, the third turning area, the first exit pupil area and the second exit pupil area all form a diffraction grating; the incident light enters through the entrance pupil area, passes through the first turning area, the second turning area, and the third turning area, and is emitted from the second exit pupil area to form a first optical waveguide path; wherein the second turning area is used to transfer the light emitted from the first turning area to the contour notch to the third turning area.

[0030] In this embodiment, the single-side entrance pupil binocular waveguide mainly includes: a waveguide substrate, wherein the waveguide substrate is divided into a first substrate and a second substrate along the central axis, an entrance pupil area, a first turning area, a first exit pupil area and a second turning area are provided in the first substrate, and a second exit pupil area and a third turning area are provided in the second substrate, and the entrance pupil area, the first turning area, the first exit pupil area, the second turning area, the third turning area, and the second exit pupil area all form a diffraction grating, and the incident light passes through the entrance pupil area and enters the waveguide substrate, and propagates in the waveguide substrate. The incident light passes through the first turning area in sequence in the waveguide substrate and then enters the second turning area, and the second turning area transfers the light emitted to the contour notch to the third turning area, and the incident light passes through the third turning area and enters the second exit pupil area, and is emitted from the second exit pupil area to form a first optical waveguide path.

[0031] In this way, the present application solves the technical problem in the related art that the image light will interfere with the wearer's nose bridge during the diffraction process. That is, the present application configures a second turning zone in the waveguide substrate in the single-sided entrance pupil binocular waveguide to transfer the incident light emitted from the waveguide substrate to the contour gap matching the wearer to other turning zones in the waveguide substrate through the second turning zone, so that when the single-sided entrance pupil binocular waveguide is worn, the image light can bypass the wearer's nose bridge, avoiding the interference of light in the wearer's nose bridge area, thereby achieving the technical effect of enabling the single-sided entrance pupil binocular waveguide to display complete image information in the wearer's non-light source side eye. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of nose bridge interference involved in an embodiment of a single-side entrance pupil binocular waveguide of the present application;

[0035] Figure 2 This is a schematic diagram of the structure of a single-side entrance pupil binocular waveguide of this application;

[0036] Figure 3 This is a schematic diagram of the position relationship of the second turning area involved in the first embodiment of the single-side entrance pupil binocular waveguide of the present application;

[0037] Figure 4This is a schematic diagram of the position of the fourth turning zone involved in the second embodiment of the single-side entrance pupil binocular waveguide of the present application;

[0038] Figure 5 A schematic diagram of a second optical waveguide path and a third optical waveguide path involved in the second embodiment of the single-side entrance pupil binocular waveguide of the present application;

[0039] Figure 6 The grating vector and schematic diagram of the first optical waveguide path involved in the first embodiment of the single-side entrance pupil binocular waveguide of the present application;

[0040] Figure 7 The grating vector and schematic diagram of the first optical waveguide path involved in the second embodiment of the single-side entrance pupil binocular waveguide of the present application;

[0041] Figure 8 The grating vectors and schematic diagram of the second optical waveguide path and the third optical waveguide path involved in the second embodiment of the single-side entrance pupil binocular waveguide of the present application;

[0042] Description of Figure Numbers:

[0043] 1. Contour notch; 2. Waveguide base; 3. First substrate; 4. Second substrate; 5. Central axis; 6. Entrance pupil; 7. First exit pupil; 8. First turning zone; 9. Second turning zone; 10. Third turning zone; 11. Second exit pupil; 12. First target point; 13. Second target point; 14. First azimuth direction; 15. Second azimuth direction; 16. Fourth turning zone.

[0044] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0046] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0047] It should be noted that, for the convenience of description, the following description is based on a single-pupil binocular waveguide equipped with a monocular side light source, a waveguide substrate, and multiple gratings, or a mobile terminal, a data storage control terminal, a PC and other terminals connected to an electronic control unit matching the single-pupil binocular waveguide as the execution subject.

[0048] Based on the above-mentioned single-side entrance pupil binocular waveguide, the overall concept of the present application is provided.

[0049] With the continuous development of AR technology, AR glasses have become an indispensable and important device in the daily life of more and more users. In related technologies, in order to reduce the weight and volume of AR glasses, technicians usually configure a single-side entrance pupil binocular waveguide on AR glasses, so that the image light is diffracted through the waveguide base in the single-side entrance pupil binocular waveguide to the human eye, and then the image is displayed in the human eye. However, please refer to Figure 1 , Figure 1 Schematic diagram of nose bridge interference involved in an embodiment of a single-side entrance pupil binocular waveguide of the present application, such as Figure 1 As shown, in the process of image light diffracting to the human eye on the non-light source side, it usually interferes with the wearer's nose bridge, causing part of the image light to be unable to be smoothly transmitted to the human eye on the non-light source side, thereby causing the image seen by the wearer to be defective, greatly reducing the wearing experience of AR glasses.

[0050] In view of the above phenomenon, the present application provides a single-sided entrance pupil binocular waveguide, the single-sided entrance pupil binocular waveguide has a contour notch matching the wearer's nose bridge, the single-sided entrance pupil binocular waveguide comprises: a waveguide substrate, the waveguide substrate is divided into a first substrate and a second substrate along the central axis; the first substrate is provided with an entrance pupil area, a first turning area, a first exit pupil area and a second turning area, the second substrate is provided with a second exit pupil area and a third turning area, the entrance pupil area, the first turning area, the second turning area, the third turning area, the first exit pupil area and the second exit pupil area all form a diffraction grating; the incident light enters through the entrance pupil area, passes through the first turning area, the second turning area, and the third turning area, and is emitted from the second exit pupil area to form a first optical waveguide path; wherein the second turning area is used to transfer the light emitted from the first turning area to the contour notch to the third turning area.

[0051] In this way, the present application solves the technical problem in the related art that the image light will interfere with the wearer's nose bridge during the diffraction process. That is, the present application configures a second turning zone in the waveguide substrate in the single-sided entrance pupil binocular waveguide to transfer the incident light emitted from the waveguide substrate to the contour gap matching the wearer to other turning zones in the waveguide substrate through the second turning zone, so that when the single-sided entrance pupil binocular waveguide is worn, the image light can bypass the wearer's nose bridge, avoiding the interference of light in the wearer's nose bridge area, thereby achieving the technical effect of enabling the single-sided entrance pupil binocular waveguide to display complete image information in the wearer's non-light source side eye.

[0052] Based on the overall concept of the single-side entrance pupil binocular waveguide of the present application, a first embodiment of the single-side entrance pupil binocular waveguide of the present application is further proposed.

[0053] In this embodiment, the single-sided entrance pupil binocular waveguide has a contour gap matching the wearer's nose bridge, and the single-sided entrance pupil binocular waveguide includes:

[0054] A waveguide substrate, wherein the waveguide substrate is divided into a first substrate and a second substrate along a central axis;

[0055] The first substrate is provided with an entrance pupil area, a first turning area, a first exit pupil area, and a second turning area, and the second substrate is provided with a second exit pupil area and a third turning area, and the entrance pupil area, the first turning area, the second turning area, the third turning area, the first exit pupil area, and the second exit pupil area all form a diffraction grating;

[0056] The incident light enters through the entrance pupil area, passes through the first turning area, the second turning area, and the third turning area, and then exits from the second exit pupil area to form a first optical waveguide path;

[0057] The second turning zone is used to transfer the light emitted from the first turning zone to the contour gap to the third turning zone.

[0058] For example, please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of the single-side entrance pupil binocular waveguide of this application, Figure 2As shown, the single-side entrance pupil binocular waveguide includes: a waveguide substrate 2, which is divided into a first substrate 3 and a second substrate 4 along both sides of a central axis 5, wherein the lengths of the first substrate 3 and the second substrate 4 are respectively D1, and the overall length of the waveguide substrate 2 is 2×D1, the first substrate 3 is provided with an entrance pupil area 6, a first turning area 8, a first exit pupil area 7 and a second turning area 9, the second substrate 4 is provided with a third turning area 10 and a second exit pupil area 11, and a diffraction grating is provided in each area in the waveguide substrate 2, that is, the entrance pupil area 6, the first turning area 8, the second turning area 9, the third turning area 10, the first exit pupil area 7, and the second exit pupil area 11 each form a diffraction grating; wherein the entrance pupil area 6 is used to couple the incident light into the waveguide substrate 2, so that the incident light enters the first turning area in the waveguide substrate 2 Zone 8; the first turning zone 8 is arranged on the optical waveguide path of the light emitted from the entrance pupil zone 6, and is used to turn the incident light to the first exit pupil zone 7; the first exit pupil zone 7 is arranged on the optical waveguide path of the light emitted from the first turning zone 8, and is used to couple the light from the first turning zone 8 out of the waveguide substrate 2; the second turning zone 9 is arranged between the first exit pupil zone 7 and the central axis 5, and is used to transfer the light after passing through the first turning zone 8 to the third turning zone 10; the third turning zone 10 is arranged at a position in the second substrate 4 where the optical waveguide path of the light emitted from the second turning zone 9 is located, and is used to turn the light from the second turning zone 9 to the second exit pupil zone 11; the second exit pupil zone 11 is arranged on the optical waveguide path of the light emitted from the third turning zone 10, and is used to couple the light from the third turning zone 10 out of the waveguide substrate 2. Figure 2 As shown, after the light source device configured on the AR glasses emits an incident light, the incident light passes through the entrance pupil area 6 and enters the waveguide substrate 2, undergoes total reflection propagation in the waveguide substrate 2, passes through the first turning area 8, and then enters the second turning area 9, the second turning area 9 transfers the light emitted from the first turning area 8 to the contour gap 1 to the third turning area 10, and the third turning area 10 transfers the incident light to the second exit pupil area 11, so that the light is coupled out of the waveguide substrate 2 after passing through the second exit pupil area 11 to form a first optical waveguide path, that is, the incident light forms a complete image in the wearer's non-light source side eye according to the first optical waveguide path.

[0059] In addition, in the present embodiment, the incident light enters the waveguide substrate 2 through the entrance pupil area 6, undergoes total reflection in the waveguide substrate 2, propagates through the first turning area 8, and then enters the first exit pupil area 7 to form a third optical waveguide path, that is, the incident light forms a complete image in the wearer's eye on the light source side according to the third optical waveguide path.

[0060] It should be noted that if Figure 2 As shown, the contour notch 1 is a contour arranged at an arc position at the central axis 5, which is used to match the nose position of the wearer so that the AR glasses device is more suitable for being worn on the head of the wearer.

[0061] Furthermore, if the propagation range of the incident light with a certain field angle in the waveguide substrate 2 after entering the entrance pupil area 6 has an upper boundary and a lower boundary, the shape of the first turning area 8 needs to completely cover the upper boundary and the lower boundary. It can be understood that the upper boundary is the direction of the light closest to the vertical upward direction among the light generated when the incident light is coupled into the waveguide substrate 2 through the entrance pupil area 6. Similarly, the lower boundary is the direction of the light closest to the vertical downward direction among the light generated when the incident light is coupled into the waveguide substrate 2 through the entrance pupil area 6.

[0062] In this way, the present application solves the technical problem in the related art that the image light will interfere with the wearer's nose bridge during the diffraction process. That is, the present application configures a second turning zone in the waveguide substrate in the single-sided entrance pupil binocular waveguide to transfer the incident light emitted from the waveguide substrate to the contour gap matching the wearer to other turning zones in the waveguide substrate through the second turning zone, so that when the single-sided entrance pupil binocular waveguide is worn, the image light can bypass the wearer's nose bridge, avoiding the interference of light in the wearer's nose bridge area, thereby achieving the technical effect of enabling the single-sided entrance pupil binocular waveguide to display complete image information in the wearer's non-light source side eye.

[0063] Further, in a feasible embodiment, a line from the center of the entrance pupil area to the first target point of the second turning area is higher than the first azimuth direction, and a line from the center of the entrance pupil area to the second target point of the second turning area is lower than the second azimuth direction;

[0064] The first target point is the highest point of the second turning zone in the vertical direction when the single-side entrance pupil binocular waveguide is in the wearing state, and the second target point is the lowest point of the second turning zone in the vertical direction when the single-side entrance pupil binocular waveguide is in the wearing state;

[0065] The first azimuth angle direction is the direction of a line from the center of the entrance pupil area to the top of the contour notch, and the second azimuth angle direction is the direction of the incident light closest to the vertically downward light after the incident light is coupled into the entrance pupil area when the single-sided entrance pupil binocular waveguide is worn.

[0066] For example, please refer to Figure 3 , Figure 3 Schematic diagram of the position relationship of the second turning zone involved in the first embodiment of the single-side entrance pupil binocular waveguide of the present application, as shown in Figure 3As shown, a line from the center of the entrance pupil area 6 to the first target point 12 in the vertical direction of the second turning area 9 is higher than the first azimuth direction 14. At the same time, a line from the center of the entrance pupil area 6 to the second target point 13 in the vertical direction of the second turning area 9 is lower than the second azimuth direction 15. The first target point 12 is the highest point in the vertical direction of the second turning area 9 when the AR glasses equipped with a single-sided entrance pupil binocular waveguide are in a worn state. Similarly, the second target point 13 is the lowest point in the vertical direction of the second turning area 9 when the AR glasses equipped with a single-sided entrance pupil binocular waveguide are in a worn state. In addition, the first azimuth direction 14 is the direction of the line corresponding to the line between the center of the entrance pupil area 6 and the top of the above-mentioned contour notch 1. Similarly, the second azimuth direction 15 is the direction of the lower boundary of the incident light wave that passes through the entrance pupil area 6 and enters the waveguide substrate 2 when the AR glasses equipped with a single-sided entrance pupil binocular waveguide are worn, that is, the direction of the light closest to the vertical downward direction among the multiple incident light rays passing through the entrance pupil area 6.

[0067] In this way, it can be ensured that after the incident light is coupled into the waveguide substrate by the entrance pupil area, all the light transmitted to the contour notch enters the second turning area, and then enters the third turning area through the second turning area to avoid interference with the wearer's nose bridge at the contour notch.

[0068] Furthermore, in a feasible embodiment, the vector sum of the grating vector of the entrance pupil area, the grating vector of the second turning area, the grating vector of the third turning area, and the grating vector of the second exit pupil area is zero.

[0069] Exemplarily, the vector sum of the grating vector K1 of the entrance pupil area 6, the grating vector K4' of the second turning area 9, the grating vector K5' of the third turning area 10, and the grating vector K3 of the second exit pupil area 11 is 0. After the incident light enters the entrance pupil area 6, it is coupled into the waveguide substrate 2 along the direction of the grating vector K1, and directly enters the second turning area 9 through the first turning area 8 along the propagation direction in the waveguide substrate 2. The incident light turns to the third turning area 10 along the direction of the grating vector K4' in the second turning area 9. The incident light turns to the second exit pupil area 11 along the direction of the grating vector K5' in the third turning area 10, and then couples out of the waveguide substrate 2 along the direction of the grating vector K3 in the second exit pupil area 11.

[0070] For details, please refer to Figure 6 , Figure 6 : is a grating vector and schematic diagram of the first optical waveguide path involved in the first embodiment of the single-side entrance pupil binocular waveguide of the present application, such as Figure 6As shown, the vector sum formed by the grating vector K4' and the grating vector K5' can be equal to the grating vector K2 of the first turning area 8, and at the same time, the vector sum of the grating vector K1 of the entrance pupil area 6, the grating vector K4' of the second turning area 9, the grating vector K5' of the third turning area 10, and the grating vector K3 of the second exit pupil area 11 is 0. Figure 2 As shown, the transmission direction of the incident light when leaving the third turning zone 10 is consistent with the transmission direction of the incident light after leaving the first turning zone 8 when being transmitted along the first optical waveguide path, thereby ensuring that the light emitted from the third turning zone 10 can smoothly enter the second exit pupil zone 11. At the same time, the optical waveguide paths from the entrance pupil zone to the second turning zone, from the second turning zone to the third turning zone, and from the third turning zone to the second exit pupil zone in the first optical waveguide path are closed loops, thereby ensuring the symmetrical relationship between the light input and output of each zone and avoiding the occurrence of scattering.

[0071] Based on the first embodiment of the single-side entrance pupil binocular waveguide of the present application, a second embodiment of the present application is proposed herein.

[0072] Furthermore, in a feasible embodiment, the second substrate is further provided with a fourth turning region forming a diffraction grating;

[0073] The incident light enters through the entrance pupil area, passes through the first turning area, the second turning area, the third turning area, and the fourth turning area, and then exits from the second exit pupil area to form the first optical waveguide path;

[0074] The vector sum of the grating vector of the entrance pupil area, the grating vector of the second turning area, the grating vector of the third turning area, the grating vector of the fourth turning area, and the grating vector of the second exit pupil area is zero.

[0075] For details, please refer to Figure 4 , Figure 4 Schematic diagram of the position of the fourth turning zone involved in the second embodiment of the single-side entrance pupil binocular waveguide of the present application, as shown in Figure 4 As shown in FIG. 1 , a fourth turning area 16 for forming a diffraction grating is also provided in the second substrate 4. The fourth turning area 16 is provided on the side of the third turning area 10 away from the central axis 5, and is used to transfer the light emitted from the third turning area 10 to the second exit pupil area 11. The incident light enters the waveguide substrate 2 through the entrance pupil area 6, and enters the fourth turning area 16 after the first turning area 8, the second turning area 9, and the third turning area 10 in sequence, so that the fourth turning area 16 transfers the light to the second exit pupil area 11, and couples out of the waveguide substrate 2 through the second exit pupil area 11 to form the following. Figure 4 The first optical waveguide path is shown.

[0076] For example, please refer to Figure 7 , Figure 7: is a grating vector and schematic diagram of the first optical waveguide path involved in the second embodiment of the single-side entrance pupil binocular waveguide of the present application, such as Figure 7 As shown, the vector sum of the grating vector K1 of the entrance pupil area 6, the grating vector K4 of the second turning area 9, the grating vector K5 of the third turning area 10, the grating vector K2 of the fourth turning area 16, and the grating vector K3 of the second exit pupil area 11 is 0, the vector sum of the grating vector K4 and the grating vector K5 is 0, and the vector sum of the grating vector K1, the grating vector K2, and the grating vector K3 is 0, that is, after the incident light enters the entrance pupil area 6, it propagates in the direction of the grating vector K1 in the entrance pupil area 6, thereby passing through The incident light passes through the first turning zone 8 and enters the second turning zone 9, and is emitted in the second turning zone 9 along the direction of the grating vector K4 to enter the third turning zone 10. The incident light is transmitted in the third turning zone 10 along the direction of the grating vector K5 to restore the transmission direction after leaving the first turning zone 8, and enters the fourth turning zone 16 according to the transmission direction, and then in the fourth turning zone 16, it is emitted into the second exit pupil zone 11 according to the direction of the grating vector K2, and finally in the second exit pupil zone 11, it is coupled out of the waveguide substrate 2 according to the direction of the grating vector K3 to form the following Figure 4 The first optical waveguide path is shown.

[0077] It should be noted that by splicing the fourth turning area 16 and the third turning area 10, the above-mentioned Figure 1 The third turning zone 10 is shown in FIG.

[0078] In this way, the optical waveguide paths from the entrance pupil area to the second turning area, from the second turning area to the third turning area, from the third turning area to the fourth turning area, and from the fourth turning area to the second exit pupil area in the first optical waveguide path are closed loops, thereby ensuring the symmetrical relationship between the light input and output of each area and avoiding the occurrence of scattering. At the same time, by ensuring the closed loop of the optical path from the second turning area to the third turning area and from the third turning area to the fourth turning area, the direction of the light after leaving the third turning area is consistent with the direction of the light before entering the second turning area.

[0079] Furthermore, in a feasible embodiment, the incident light is also incident through the entrance pupil area, passes through the first turning area and the fourth turning area, and then exits from the second exit pupil area to form a second optical waveguide path;

[0080] The vector sum of the grating vector of the entrance pupil area, the grating vector of the fourth turning area, and the grating vector of the second exit pupil area is zero.

[0081] For example, please refer to Figure 5 , Figure 5 Schematic diagram of the second optical waveguide path and the third optical waveguide path involved in the second embodiment of the single-side entrance pupil binocular waveguide of the present application, as shown in Figure 5As shown, after the incident light is coupled into the waveguide substrate 2 through the entrance pupil area 6, it can also enter the second exit pupil area 11 after passing through the first turning area 8 and the fourth turning area 16 in sequence, and is coupled out through the second exit pupil area 11 to form a second optical waveguide path, wherein the vector sum of the grating vector K1 of the entrance pupil area 6, the grating vector K2 of the fourth turning area 16, and the grating vector K3 of the second exit pupil area 11 is 0, that is, please refer to Figure 8 , Figure 8 Schematic diagram of the grating vectors and the third optical waveguide path involved in the second embodiment of the single-side entrance pupil binocular waveguide of the present application, as shown in FIG. Figure 8 As shown, the light is emitted in the entrance pupil area 6 along the direction of the grating vector K1 and enters the waveguide substrate 2, enters the fourth turning area 16 after passing through the first turning area 8, is redirected in the fourth turning area 16 along the direction of the grating vector K2 to the second exit pupil area 11, and is coupled out of the waveguide substrate 2 in the second exit pupil area 11 along the direction of the grating vector K3.

[0082] In this way, the optical waveguide paths from the entrance pupil area to the fourth turning area and from the fourth turning area to the second exit pupil area in the second optical waveguide path are closed loops, thereby ensuring the symmetrical relationship between the light input and output of each area and avoiding the occurrence of scattering.

[0083] Furthermore, in a feasible embodiment, the incident light is also incident through the entrance pupil area, and is emitted from the first exit pupil area after passing through the first turning area, thereby forming a third optical waveguide path;

[0084] The vector sum of the grating vector of the entrance pupil area, the grating vector of the first turning area, and the grating vector of the first exit pupil area is zero.

[0085] Specifically, Figure 5 As shown, after the incident light is coupled into the waveguide substrate 2 through the entrance pupil area 6, it can also be transferred to the first exit pupil area 7 through the first turning area 8, and coupled out of the waveguide substrate 2 through the first exit pupil area 7 to form a third optical waveguide path, wherein the vector sum of the grating vector K1 of the entrance pupil area 6, the grating vector K2 of the first turning area 8, and the grating vector K3 of the first exit pupil area 7 is 0. That is, as Figure 8 As shown, the light is emitted in the entrance pupil region 6 along the direction of the grating vector K1 and enters the first turning region 8, is redirected in the first turning region 8 along the direction of the grating vector K2 to the first exit pupil region 7, and is coupled out of the waveguide substrate 2 in the first exit pupil region 7 along the direction of the grating vector K3.

[0086] In this way, the optical waveguide paths from the entrance pupil area to the first turning area and from the first turning area to the first exit pupil area in the third optical waveguide path are closed, thereby ensuring the symmetrical relationship between the light input and output of each area and avoiding the occurrence of scattering.

[0087] Furthermore, in a feasible embodiment, at least a portion of the third turning zone is located directly above the contour notch.

[0088] Specifically, at least a partial area of ​​the third turning zone 10 should be located in the first substrate 3 , and the partial area is arranged directly above the contour notch 1 , that is, the third turning zone 10 covers a portion of the contour notch 1 in the vertical direction.

[0089] In addition, in this embodiment and another embodiment, the size of the third turning zone 10 in the horizontal direction can be larger than the contour defect, so as to achieve complete coverage of the contour defect in the vertical direction. In this way, by making the third turning zone completely cover the contour defect in the vertical direction, it can be ensured that all light emitted from the second turning zone enters the third turning zone.

[0090] Further, in a feasible embodiment, the center of the first exit pupil area and the center of the second exit pupil area are symmetrically arranged along the central axis.

[0091] Specifically, the center point of the first exit pupil area 7 and the center point of the second exit pupil area 11 are symmetrically arranged about the central axis 5, so that the incident light can be coupled out to the eyes on different sides of the wearer respectively after passing through the first exit pupil area 7 and the second exit pupil area 11, so that the wearer can see the complete image.

[0092] In addition, in this embodiment and another embodiment, the distance between the center point of the first exit pupil area 7 and the center point of the second exit pupil area 11 can be equal to the wearer's pupil distance, so that the light coupled out through the first exit pupil area 7 and the second exit pupil area 11 can more accurately enter the wearer's left eye and right eye respectively.

[0093] Furthermore, in a feasible embodiment, the entrance pupil area is arranged on a side of the first substrate away from the second turning area, wherein a vertical distance from the center of the entrance pupil area to the central axis is greater than a vertical distance from the center of any area to the central axis.

[0094] Specifically, Figure 1 As shown, the entrance pupil area 6 is arranged on the side of the first substrate 3 away from the second turning area 9, that is, the entrance pupil area 6 is arranged in the first waveguide substrate 2 at a side away from the central axis 5 of the waveguide substrate 2 in the horizontal direction and at an upper position in the vertical direction, so that the vertical distance between the center point of the entrance pupil area 6 and the central axis 5 is greater than the vertical distance between the center point of each of the other areas in the single-side entrance pupil optical waveguide structure and the central axis 5. In this way, the situation where the entrance pupil area is arranged at the center of the first substrate can be avoided.

[0095] Further, in a feasible embodiment, the grating vector of the entrance pupil region is parallel to the central axis;

[0096] The grating vector of the first turning zone, the grating vector of the second turning zone, and the grating vector of the third turning zone all form an angle with the central axis;

[0097] The grating vector of the first exit pupil area and the grating vector of the second exit pupil area are both perpendicular to the central axis.

[0098] Specifically, the grating vector of the entrance pupil area 6 is parallel to the central axis 5, and the directions of the grating vectors of the first turning area 8, the second turning area 9, and the third turning area 10 are all at an angle to the central axis 5, and the grating vectors of the first exit pupil area 7 and the second exit pupil area 11 are perpendicular to the central axis 5. It can be understood that the grating vectors of each area can be specifically configured by the technician according to the needs.

[0099] The present application also provides an AR glasses, and the AR glasses of the present application include a single-sided entrance pupil binocular waveguide as described in any of the above embodiments. It can be understood that a single input light source needs to be configured on the AR glasses, and the input light source can be specifically configured on the temple of the AR glasses close to the above-mentioned entrance pupil area.

[0100] The AR glasses of this application adopt the above-mentioned single-side entrance pupil binocular waveguide to solve the technical problem in the related art that the image light will interfere with the wearer's nose bridge during the diffraction process. Compared with the prior art, the beneficial effects of the AR glasses provided by this application are the same as the beneficial effects of the single-side entrance pupil binocular waveguide provided by the above-mentioned embodiment, and the other technical features in the AR glasses are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0101] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0102] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0103] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A single-side entrance pupil binocular waveguide, characterized in that: The single-sided entrance pupil binocular waveguide has a contour notch matching the wearer's nose bridge, and the single-sided entrance pupil binocular waveguide includes: A waveguide substrate, wherein the waveguide substrate is divided into a first substrate and a second substrate along a central axis; The first substrate is provided with an entrance pupil area, a first turning area, a first exit pupil area, and a second turning area, and the second substrate is provided with a second exit pupil area and a third turning area, and the entrance pupil area, the first turning area, the second turning area, the third turning area, the first exit pupil area, and the second exit pupil area all form a diffraction grating; The incident light enters through the entrance pupil area, passes through the first turning area, the second turning area, and the third turning area, and then exits from the second exit pupil area to form a first optical waveguide path; The second turning zone is used to transfer the light emitted from the first turning zone to the contour gap to the third turning zone.

2. The single-side entrance pupil binocular waveguide according to claim 1, characterized in that: A line from the center of the entrance pupil area to the first target point of the second turning area is higher than the first azimuth direction, and a line from the center of the entrance pupil area to the second target point of the second turning area is lower than the second azimuth direction; The first target point is the highest point of the second turning zone in the vertical direction when the single-side entrance pupil binocular waveguide is in the wearing state, and the second target point is the lowest point of the second turning zone in the vertical direction when the single-side entrance pupil binocular waveguide is in the wearing state; The first azimuth angle direction is the direction of a line from the center of the entrance pupil area to the top of the contour notch, and the second azimuth angle direction is the direction of the incident light closest to the vertically downward light after the incident light is coupled into the entrance pupil area when the single-sided entrance pupil binocular waveguide is worn.

3. The single-side entrance pupil binocular waveguide according to claim 1, characterized in that: The vector sum of the grating vector of the entrance pupil area, the grating vector of the second turning area, the grating vector of the third turning area, and the grating vector of the second exit pupil area is zero.

4. The single-side entrance pupil binocular waveguide according to claim 1, characterized in that: The second substrate is also provided with a fourth turning region forming a diffraction grating; The incident light enters through the entrance pupil area, passes through the first turning area, the second turning area, the third turning area, and the fourth turning area, and then exits from the second exit pupil area to form the first optical waveguide path; The vector sum of the grating vector of the entrance pupil area, the grating vector of the second turning area, the grating vector of the third turning area, the grating vector of the fourth turning area, and the grating vector of the second exit pupil area is zero.

5. The single-side entrance pupil binocular waveguide according to claim 4, characterized in that: The incident light also enters through the entrance pupil area, passes through the first turning area and the fourth turning area, and then exits from the second exit pupil area to form a second optical waveguide path; The vector sum of the grating vector of the entrance pupil area, the grating vector of the fourth turning area, and the grating vector of the second exit pupil area is zero.

6. The single-side entrance pupil binocular waveguide according to any one of claims 1 to 5, characterized in that: The incident light also enters through the entrance pupil area, passes through the first turning area, and exits from the first exit pupil area to form a third optical waveguide path; The vector sum of the grating vector of the entrance pupil area, the grating vector of the first turning area, and the grating vector of the first exit pupil area is zero.

7. The single-side entrance pupil binocular waveguide according to any one of claims 1 to 5, characterized in that: At least a portion of the third turning zone is located directly above the contour notch.

8. The single-side entrance pupil binocular waveguide according to any one of claims 1 to 5, characterized in that: The center of the first exit pupil area and the center of the second exit pupil area are symmetrically arranged along the central axis.

9. The single-side entrance pupil binocular waveguide according to any one of claims 1 to 5, characterized in that: The entrance pupil area is arranged on a side of the first substrate away from the second turning area, wherein a vertical distance from the center of the entrance pupil area to the central axis is greater than a vertical distance from the center of any area to the central axis.

10. The single-side entrance pupil binocular waveguide according to any one of claims 1 to 5, characterized in that: The grating vector of the entrance pupil area is parallel to the central axis; The grating vector of the first turning zone, the grating vector of the second turning zone, and the grating vector of the third turning zone all form an angle with the central axis; The grating vector of the first exit pupil area and the grating vector of the second exit pupil area are both perpendicular to the central axis.

11. An AR glasses, characterized in that: The AR glasses include the single-sided entrance-pupil binocular waveguide according to any one of claims 1 to 10.

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