Optical waveguide system, augmented reality device and control method of augmented reality device

Abstract

The invention provides an optical waveguide system, augmented reality equipment and a control method of the augmented reality equipment, the optical waveguide system comprises a screen assembly, a first waveguide and a second waveguide, and the screen assembly comprises a first screen and a second screen which are arranged at an interval; the first waveguide is provided with a first coupling-out region; the second waveguide is arranged on the side, facing the screen assembly, of the first waveguide, the second waveguide is provided with a first coupling-in area, a second coupling-in area and a second coupling-out area which are arranged at intervals, and the first coupling-in area and the second coupling-in area are arranged corresponding to the light emitting sides of the first screen and the second screen respectively; light emitted by the first screen passes through the first coupling-in area and the second waveguide, enters the first waveguide and is transmitted to the first coupling-out area; light emitted by the second screen enters the second waveguide through the second coupling-in area and is transmitted to the second coupling-out area, and the projection of the second coupling-out area in the first waveguide is located in the first coupling-out area. According to the technical scheme, the use experience of the user can be improved.

Description

Technical Field

[0001] The present invention relates to the field of optical waveguide technology, and in particular to an optical waveguide system, an augmented reality device, and a control method for the augmented reality device. Background Art

[0002] In the related art, the user experience can be improved by improving the image clarity of the augmented reality device. Under the premise of a certain screen resolution, the angular resolution can be increased by reducing the diagonal field of view of the single-eye imaging to improve the image clarity of the augmented reality device.

[0003] However, such a setting will reduce the visual range of the augmented reality device and affect the user experience. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical waveguide system and an augmented reality device, aiming to improve the clarity of the image and enhance the user experience on the basis of ensuring the visual range of the augmented reality device.

[0005] To achieve the above object, the present invention provides an optical waveguide system, comprising:

[0006] A screen assembly, the screen assembly comprising a first screen and a second screen arranged at an interval;

[0007] a first waveguide having a first outcoupling region; and

[0008] a second waveguide, the second waveguide being arranged on a side of the first waveguide facing the screen assembly, the second waveguide comprising a first coupling-in region, a second coupling-in region and a second coupling-out region which are arranged at intervals, the first coupling-in region and the second coupling-in region being arranged corresponding to light exiting sides of the first screen and the second screen respectively;

[0009] The light emitted by the first screen passes through the first coupling-in region, passes through the second waveguide, enters the first waveguide, and is transmitted to the first coupling-out region;

[0010] The light emitted by the second screen enters the second waveguide through the second coupling-in region and is transmitted to the second coupling-out region. The projection of the second coupling-out region on the first waveguide is located in the first coupling-out region.

[0011] Optionally, the second waveguide is provided in plurality, and the plurality of second waveguides are stacked on a side of the first waveguide facing the screen assembly;

[0012] A plurality of the second coupling-in regions are overlappedly arranged in a stacking direction of a plurality of the second waveguides, and a plurality of the second coupling-out regions are staggeredly arranged in a stacking direction of a plurality of the second waveguides;

[0013] The second waveguide has a first state and a second state, and when the second waveguide is in the first state, the light received by the second coupling-in region is reflected in the second waveguide to the second coupling-out region;

[0014] When the second waveguide is in the second state, light received by one of the second coupling-in regions is transmitted within the second waveguide to an adjacent second coupling-in region.

[0015] Optionally, a deflection structure is provided on a side of each of the second waveguides facing away from the screen assembly, and the deflection structure and the second coupling region are arranged opposite to each other;

[0016] When the second waveguide is in the first state, the deflection structure is powered off to reflect the light transmitted from the second coupling region into the second waveguide, so that the light is reflected in the second waveguide to the second coupling region;

[0017] When the second waveguide is in the second state, the deflection structure is energized to transmit the light transmitted from the second coupling region into the second waveguide, so that the light is transmitted to the adjacent second waveguide.

[0018] Optionally, the deflection structure comprises a plurality of liquid crystal molecules arranged in an array, and the liquid crystal molecules are configured to deflect when powered on.

[0019] Optionally, projections of a plurality of the second outcoupling regions on the first waveguide cover the entire area of ​​the first outcoupling region.

[0020] Optionally, the field of view angle of the first outcoupling region ranges from 40° to 50°;

[0021] And / or, the field of view angle of the second outcoupling region ranges from 15° to 20°;

[0022] And / or, the resolutions of the first screen and the second screen are the same.

[0023] Optionally, a reflective structure is provided on a side of the second out-coupling region facing the first out-coupling region, for reflecting light transmitted from the first out-coupling region to the reflective structure.

[0024] Optionally, the optical waveguide system further comprises a protective layer, wherein the protective layer is arranged on a side of the first waveguide facing away from the screen assembly.

[0025] The present invention also provides an augmented reality device, comprising any one of the optical waveguide systems described above.

[0026] The present invention also provides a control method for an augmented reality device, wherein the augmented reality device comprises a plurality of stacked second waveguides, wherein the second waveguides have a second coupling-in region and a second coupling-out region arranged at intervals, wherein the plurality of second coupling-in regions are overlapped in a stacking direction of the plurality of second waveguides, and the plurality of second coupling-out regions are staggered in a stacking direction of the plurality of second waveguides;

[0027] The second waveguide has a first state and a second state. When the second waveguide is in the first state, the light received by the second coupling region is reflected in the second waveguide to the second coupling region. When the second waveguide is in the second state, the light received by the second coupling region is transmitted in the second waveguide to the adjacent second coupling region.

[0028] The control method of the augmented reality device comprises:

[0029] Acquire user's gaze point position information, where the gaze point position information is position information of the gaze point of the human eye on the second waveguide;

[0030] When the position of the gaze point is located in the second outcoupling region of a second waveguide, the second waveguide is controlled to switch to the first state, and the other second waveguides are controlled to switch to the second state.

[0031] According to the technical solution of the present invention, the optical waveguide system includes a screen assembly, a first waveguide and a second waveguide, wherein the light emitted by the first screen can enter the first waveguide through the first coupling-in region and be transmitted to the first coupling-out region, so as to be transmitted from the first coupling-out region to the human eye and form an image in the human eye; the light emitted by the second screen can enter the second waveguide through the second coupling-in region and be transmitted to the second coupling-out region, so as to be transmitted from the second coupling-out region to the human eye and form an image in the human eye. Since the projection of the second coupling-in region on the first waveguide is located in the first coupling-out region, the image displayed by the second coupling-out region can be overlapped on the image displayed by the first coupling-out region, and since the field of view of the second coupling-out region is small, the clarity of the image displayed by the second coupling-out region can be improved. That is, according to the technical solution of the present invention, the visual range of the augmented reality device can be ensured through the imaging of the first coupling-in region, and the clarity of the local area of ​​the image can be improved through the imaging of the second coupling-in region, thereby comprehensively improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention 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, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 A top view of an embodiment of an optical waveguide system of the present invention;

[0034] Figure 2 for Figure 1 A front view of the optical waveguide system shown;

[0035] Figure 3 for Figure 1 A light propagation path diagram of the optical waveguide system shown;

[0036] Figure 4 A top view of another embodiment of the optical waveguide system of the present invention;

[0037] Figure 5 for Figure 4 A front view of the optical waveguide system shown;

[0038] Figure 6 for Figure 5 The light propagation path diagram of the deflection structure of the optical waveguide system shown.

[0039] Description of Figure Numbers:

[0040] Label name Label name 100 Optical waveguide system 41 First coupling region 10 First Screen 42 The second coupling region 20 Second Screen 43 The second coupling zone 30 First Waveguide 44 Deflection structure 31 First decoupling zone 441 liquid crystal molecules 40 Second waveguide 50 Protective layer

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] Conventional optical waveguide systems can generally improve the angular resolution by reducing the field of view of the diagonal of the monocular imaging under the premise of a certain screen resolution, so as to improve the image clarity of the augmented reality device. However, such a setting will reduce the visual range of the augmented reality device, and it is impossible to have both high angular resolution and large field of view, which will affect the user experience. Therefore, the present invention proposes an optical waveguide system, which sets a first waveguide and a second waveguide, and makes the projection of the outcoupling area of ​​the second waveguide on the first waveguide located within the outcoupling area of ​​the first waveguide, so that the display screen formed by the emission of the second waveguide can be partially covered on the display screen formed by the emission of the first waveguide, so that the visual range of the augmented reality device can be ensured by imaging the first outcoupling area, and the local area clarity of the image can be improved by imaging the second coupling area, so that on the basis of ensuring the visual range of the augmented reality device, the clarity of the image is improved, and the user experience is comprehensively improved.

[0047] Please refer to Figures 1 to 3 In some embodiments of the inventive optical waveguide system 100, the optical waveguide system 100 comprises:

[0048] A screen assembly, the screen assembly comprising a first screen 10 and a second screen 20 arranged at an interval;

[0049] A first waveguide 30 having a first outcoupling region 31; and

[0050] A second waveguide 40, the second waveguide 40 is arranged on a side of the first waveguide 30 facing the screen assembly, the second waveguide 40 has a first coupling region 41, a second coupling region 42 and a second coupling region 43 which are arranged at intervals, the first coupling region 41 and the second coupling region 42 are arranged corresponding to the light exiting sides of the first screen 10 and the second screen 20 respectively;

[0051] The light emitted by the first screen 10 passes through the first coupling-in region 41 and the second waveguide 40 , enters the first waveguide 30 , and is transmitted to the first coupling-out region 31 ;

[0052] The light emitted from the second screen 20 enters the second waveguide 40 through the second coupling-in region 42 and is transmitted to the second coupling-out region 43 . The projection of the second coupling-out region 43 on the first waveguide 30 is located in the first coupling-out region 31 .

[0053] In this embodiment, the optical waveguide system 100 includes a screen component, a first waveguide 30 and a second waveguide 40. The screen component can be used as an image source of the optical waveguide system 100, specifically including a first screen 10 and a second screen 20. The first screen 10 and the second screen 20 are used to emit light to the first waveguide 30 and the second waveguide 40 respectively, and the image displayed by the second screen 20 is a partial image of the first screen 10. The first screen 10 and the second screen 20 here can be but are not limited to being set as Micro LEDs, which have good stability, service life and working performance. The first waveguide 30 has a first coupling-out region 31, and the second waveguide 40 is arranged on the side of the first waveguide 30 facing the screen component, and has a first coupling-in region 41, a second coupling-in region 42 and a second coupling-out region 43 arranged at intervals. The first coupling-in region 41 and the second coupling-in region 42 of the second waveguide 40 are arranged corresponding to the light-emitting sides of the first screen 10 of the second waveguide 40 and the second screen 20 of the second waveguide 40, respectively, so as to receive the incident light emitted by the first screen 10 and the second screen 20, respectively. Specifically, the light emitted by the first screen 10 can pass through the first coupling-in area 41, and pass through the base of the second waveguide 40 to enter the base of the first waveguide 30, and be transmitted to the first coupling-out area 31 through total reflection of the base of the first waveguide 30, so as to be emitted through the first coupling-out area 31 to form a display image to be acquired by the human eye; the light emitted by the second screen 20 can pass through the second coupling-in area 42 to enter the base of the second waveguide 40, and be transmitted to the second coupling-out area 43 through total reflection of the base of the second waveguide 40, so as to be emitted through the second coupling-out area 43 to form a display image to be acquired by the human eye. Then, when both the emitted light of the first coupling-out area 31 and the emitted light of the second coupling-out area 43 enter the human eye, the human eye can receive the overlapping images on the first screen 10 and the second screen 20.

[0054] On this basis, the projection of the second outcoupling area 43 on the first waveguide 30 is located in the first outcoupling area 31, so that the display image formed by the emission of the second waveguide 40 can be partially covered on the display image formed by the emission of the first waveguide 30. Since the field of view of the second outcoupling area 43 is smaller than the field of view of the first outcoupling area 31, when the picture resolutions of the first screen 10 and the second screen 20 are the same, the display image formed by the second outcoupling area 43 is clearer, thereby achieving the effect of partially improving the clarity of the display image.

[0055] Here, an outcoupling grating may be provided on the base of the first waveguide 30 to form a first outcoupling region 31. Taking the base of the first waveguide 30 as a rectangular parallelepiped as an example, the first outcoupling region 31 may be provided in a rectangular shape and provided on a side surface of the first waveguide 30 facing away from the screen assembly. Similarly, an outcoupling grating may be provided on the base of the second waveguide 40 to form a second outcoupling region 43, or an incoupling grating may be provided on the base of the second waveguide 40 at intervals to form a first incoupling region 41 and a second incoupling region 42, respectively. Taking the base of the second waveguide 40 as a rectangular parallelepiped as an example, the second outcoupling region 43 may be provided in a rectangular shape and provided on a side surface of the base of the second waveguide 40 facing the first waveguide 30, and the first incoupling region 41 and the second incoupling region 42 may be provided in a rectangular shape and respectively located on a side surface of the base of the second waveguide 40 facing the screen assembly. The first coupling-in region 41 and the second coupling-in region 42 can be printed on the substrate as separate optical elements, or can be directly processed on the surface of the substrate to form a coupling structure, which is not limited here. Similarly, the first coupling-out region 31 and the second coupling-out region 43 can be printed on the substrate as separate optical elements, or can be directly processed on the surface of the substrate to form a coupling structure, which is not limited here.

[0056] Please refer to Figure 4 and Figure 5 In some embodiments of the invented optical waveguide system 100, the second waveguide 40 is provided in plurality, and the plurality of the second waveguides 40 are stacked on a side of the first waveguide 30 facing the screen assembly;

[0057] A plurality of the second coupling-in regions 42 are overlapped and arranged in a stacking direction of a plurality of the second waveguides 40 , and a plurality of the second coupling-out regions 43 are staggered and arranged in a stacking direction of a plurality of the second waveguides 40 ;

[0058] The second waveguide 40 has a first state and a second state. When the second waveguide 40 is in the first state, the light received by the second coupling-in area 42 is reflected in the second waveguide 40 to the second coupling-out area 43.

[0059] When the second waveguide 40 is in the second state, light received by one of the second coupling-in regions 42 is transmitted within the second waveguide 40 to an adjacent second coupling-in region 42 .

[0060] In this embodiment, a plurality of second waveguides 40 are stacked on the side of the first waveguide 30 facing the screen assembly, and each second waveguide 40 has a second coupling-in area 42 and a second coupling-out area 43 arranged at intervals, and a plurality of second coupling-in areas 42 are arranged overlappingly in the stacking direction of the plurality of second waveguides 40, and a plurality of second coupling-out areas 43 are arranged staggered in the stacking direction of the plurality of second waveguides 40. In addition, the second waveguide 40 has a first state and a second state. When the second waveguide 40 is in the first state, the light received by the second coupling-in area 42 is transmitted to the second coupling-out area 43 through total reflection of the substrate of the second waveguide 40, so that the light is emitted outward through the second coupling-out area 43 to form a display image; when the second waveguide 40 is in the second state, the light received by a second coupling-in area 42 transmits through the substrate of the second waveguide 40, so as to penetrate the second waveguide 40 and be transmitted to the second coupling-in area 42 adjacent to the second waveguide 40, thereby enabling the light emitted from the second screen 20 to pass through other second coupling-in areas 42 as required and be transmitted to a specific second waveguide 40. At this time, by switching the specific second waveguide 40 to the first state, the light emitted by the second screen 20 can be transmitted to the corresponding second outcoupling area 43 through the base of the second waveguide 40, and emitted from the corresponding second outcoupling area 43 to form a display image to be acquired by the human eye, so as to improve the clarity of the corresponding local image.

[0061] On this basis, in order to improve the display effect, the number of second-type waveguide layers can be further increased, and the density of multiple second coupling regions can be increased, so that the second coupling regions can accurately match the gaze point of the human eye, thereby correspondingly improving the clarity of the local area where the gaze point of the human eye is located.

[0062] Please continue to refer to Figure 3 In some embodiments of the invented optical waveguide system 100, a deflection structure 44 is provided on a side of each of the second waveguides 40 facing away from the screen assembly, and the deflection structure 44 and the second coupling region 42 are arranged opposite to each other;

[0063] When the second waveguide 40 is in the first state, the deflection structure 44 is powered off to reflect the light transmitted from the second coupling-in region 42 into the second waveguide 40, so that the light is reflected in the second waveguide 40 to the second coupling-out region 43;

[0064] When the second waveguide 40 is in the second state, the deflection structure 44 is energized to transmit the light transmitted from the second coupling region 42 into the second waveguide 40 , so that the light is transmitted to the adjacent second waveguide 40 .

[0065] In this embodiment, a deflection structure 44 is provided on a side of each second waveguide 40 away from the screen assembly. The deflection structure 44 and the second coupling region 42 are arranged opposite to each other, and are used to reflect or project the light transmitted from the second coupling region 42 to the deflection structure 44. Specifically, when the second waveguide 40 is in the first state, the deflection structure 44 is powered off, and at this time, the deflection structure 44 can reflect the light transmitted from the second coupling region 42 into the second waveguide 40, so that the light is reflected in the second waveguide 40 to the second coupling region 43; when the second waveguide 40 is in the second state, the deflection structure 44 is powered on, and at this time, it is used to transmit the light transmitted from the second coupling region 42 into the second waveguide 40, so that the light is transmitted to the adjacent second waveguide 40. In this way, by controlling whether the deflection structures 44 of the second waveguides 40 of different layers are powered on, the outgoing light of the second screen 20 can sequentially penetrate the second waveguides 40 of the corresponding number of layers, so as to transmit the light to the specific second coupling region 43, so that the corresponding second coupling region 43 can form a local high-definition picture display toward the human eye.

[0066] Please refer to Figure 6 In some embodiments of the inventive optical waveguide system 100, the deflection structure 44 includes a plurality of liquid crystal molecules 441 arranged in an array, and the liquid crystal molecules 441 are configured to deflect when powered on.

[0067] In this embodiment, the deflection structure 44 includes a plurality of liquid crystal molecules 441 arranged in an array. By applying a voltage to the deflection structure 44, the deflection angle of the liquid crystal molecules 441 can be changed, so that the liquid crystal molecules 441 can be powered on or off to stop on the transmission path of the light path when the power is off to reflect the light path, or the liquid crystal molecules 441 can be deflected when powered on and spaced apart from adjacent liquid crystal molecules 441 so that the light path can pass through the gaps between adjacent liquid crystal molecules 441, thereby allowing light to pass through the deflection structure 44.

[0068] Please refer to Figure 5 In some embodiments of the inventive optical waveguide system 100 , projections of a plurality of the second outcoupling regions 43 on the first waveguide 30 cover the entire area of ​​the first outcoupling region 31 .

[0069] In the present embodiment, a plurality of second waveguides 40 are stacked on the side of the first waveguide 30 facing the screen assembly, and each second waveguide 40 has a second outcoupling area 43. The plurality of second outcoupling areas 43 are staggered in the stacking direction of the plurality of second waveguides 40, and the projections of the plurality of second outcoupling areas 43 on the first waveguide 30 can cover the entire area of ​​the first outcoupling area 31. Specifically, the entire area of ​​the first outcoupling area 31 can be equally divided into a plurality of local areas, and each second outcoupling area 43 is arranged corresponding to a local area, so that the projection of each second outcoupling area 43 on the first waveguide 30 covers an equally divided local area. In this way, by making the corresponding second outcoupling area 43 emit light, the display screen formed by the emission can correspond to the corresponding local area of ​​the display screen formed by the emission of the first outcoupling area 31, thereby improving the picture clarity of any local area in the complete display screen, so as to improve the user experience.

[0070] In some embodiments of the inventive optical waveguide system 100, the field angle of the first outcoupling region 31 ranges from 40° to 50°.

[0071] In the present embodiment, when the field of view angle range of the first outcoupling zone 31 is too large, it is easy to cause the angular resolution corresponding to the first screen 10 to be too low, so that the human eye feels a stronger sense of pixel lattice; and when the field of view angle range of the first outcoupling zone 31 is too small, it will limit the visual range of the human eye, reduce the user experience, and is not conducive to the first screen 10 transmitting some large-angle light to it, affecting the utilization rate of light; therefore, the field of view angle range of the first outcoupling zone 31 is set to be greater than or equal to 40° and less than or equal to 50°, for example, 40°, 42°, 44°, 46°, 48°, 50°, etc., such a setting can effectively ensure that the optical waveguide system 100 has a larger field of view angle, and can avoid the image clarity being too low and causing a negative impact on the user experience.

[0072] In some embodiments of the inventive optical waveguide system 100, the field angle of the second outcoupling region 43 is in the range of 15° to 20°.

[0073] In this embodiment, when the viewing angle range of the second outcoupling area 43 is too large, it is easy to cause the angular resolution corresponding to the first screen 10 to be too low, so that the human eye can feel a stronger sense of pixel lattice; and when the viewing angle range of the first outcoupling area 31 is too small, it will limit the visual range of the human eye, and it is necessary to increase the number of layers of the second waveguide 40 so that the projections of several second outcoupling areas 43 on the first waveguide 30 can cover the entire area of ​​the first outcoupling area 31, which will lead to an increase in the volume of the optical waveguide system 100; therefore, the second outcoupling area 31 is too small. The field of view angle range of the zone 43 is set to be greater than or equal to 15° and less than or equal to 20°, for example, 15°, 16°, 17°, 18°, 19°, 20°, etc. This setting can effectively ensure the clarity of the image generated by the second outcoupling zone 43 of the optical waveguide system 100, so as to clearly display the picture details of the local display picture by improving the clarity of the local display picture of the optical waveguide system 100, and thereby make the clarity of the local display picture close to the resolution limit of the normal vision of the human eye.

[0074] In some embodiments of the inventive light guide system 100, the resolutions of the first screen 10 and the second screen 20 are the same.

[0075] In this embodiment, the resolutions of the first screen 10 and the second screen 20 are set to the same value, and the second screen 20 only displays a partial picture of the first screen 10, and the partial picture displayed by the second screen 20 can be overlapped and displayed at the corresponding position of the display picture of the first screen 10. Under the premise that the picture resolutions of the first screen 10 and the second screen 20 are the same, since the field of view of the second outcoupling area 43 is smaller than that of the first outcoupling area 31, the clarity of the picture displayed by the second screen 20 at the human eye is effectively improved, that is, the clarity of the picture in the partial area of ​​the overall display picture is improved, thereby improving the overall display effect of the optical waveguide system 100.

[0076] In some embodiments of the inventive optical waveguide system 100 , a reflective structure (not shown) is disposed on a side of the second outcoupling region 43 facing the first outcoupling region 31 , for reflecting light transmitted from the first outcoupling region 31 to the reflective structure.

[0077] In this embodiment, the second outcoupling area 43 is located on the light output path of the first outcoupling area 31. Thus, a reflective structure is provided on the side of the second outcoupling area 43 facing the first outcoupling area 31, which can reflect the light transmitted to the reflective structure, so that the reflected light is transmitted along the light output direction away from the first outcoupling area 31. That is, the outcoupling light generated by the part of the first outcoupling area 31 that avoids the second outcoupling area 43 can propagate along the original direction, so as to reach the human eye together with the outcoupling light generated by the second outcoupling area 43, while the outcoupling light generated by the part of the first outcoupling area 31 that is arranged opposite to the second outcoupling area 43 propagates in the reverse direction under the action of the reflective structure, so as to avoid the display picture with low clarity formed by its output from entering the human eye, which is beneficial to improving the display effect of the image.

[0078] Please refer to Figure 1 In some embodiments of the invented optical waveguide system 100, the optical waveguide system 100 further comprises a protective layer 50, wherein the protective layer 50 is disposed on a side of the first type of waveguide layer facing away from the screen assembly.

[0079] In this embodiment, the protective layer 50 covers the surface of the first type waveguide layer facing away from the screen assembly, which can protect the first outcoupling region 31 and other structures on the first type waveguide layer and extend the service life of the optical waveguide system 100.

[0080] The present invention further proposes an augmented reality device (not shown), which includes the optical waveguide system 100 described in any of the aforementioned embodiments. The specific structure of the optical waveguide system 100 refers to any of the aforementioned embodiments. Since the augmented display device proposed in this application can apply all the technical solutions in all the aforementioned embodiments, it at least has all the beneficial effects brought by the aforementioned technical solutions, which will not be described one by one here.

[0081] The present invention further provides a control method for an augmented reality device, characterized in that the augmented reality device comprises a plurality of stacked second waveguides 40, the second waveguides 40 having second coupling-in regions 42 and second coupling-out regions 43 arranged at intervals, the plurality of second coupling-in regions 42 being arranged overlappingly in the stacking direction of the plurality of second waveguides 40, and the plurality of second coupling-out regions 43 being arranged staggered in the stacking direction of the plurality of second waveguides 40;

[0082] The second waveguide 40 has a first state and a second state. When the second waveguide 40 is in the first state, the light received by the second coupling-in area 42 is reflected in the second waveguide 40 to the second coupling-out area 43. When the second waveguide 40 is in the second state, the light received by one of the second coupling-in areas 42 is transmitted in the second waveguide 40 to an adjacent second coupling-in area 42.

[0083] The control method of the augmented reality device comprises:

[0084] Acquire the user's gaze point position information, where the gaze point position information is the position information of the gaze point of the human eye on the second waveguide 40;

[0085] When the position of the gaze point is located at the second outcoupling region 43 of a second waveguide 40 , the second waveguide 40 is controlled to switch to the first state, and the other second waveguides 40 are controlled to switch to the second state.

[0086] In this embodiment, it can be but not limited to the image at the pupil collected by the tracker, and the user's gaze point position information is calculated and recorded in real time to determine the position information of the human eye's gaze point on the second waveguide 40. After obtaining the gaze point position information, the second waveguide 40 where the second outcoupling area 43 is located at the location of the human eye's gaze point can be controlled to switch to the first state, and the other second waveguides 40 can be controlled to switch to the second state, so that the outgoing light of the second screen 20 can be transmitted through the other second waveguides 40 and transmitted to the second waveguide 40 of a specific number of layers, and transmitted to the specific second outcoupling area 43 through the total reflection of the base of the second waveguide 40, so that the second outcoupling area 43 located at the human eye's gaze point can be emitted to form a display screen and be acquired by the human eye. At the same time, the peripheral light of the human eye can also see the light emitted by other structures of the optical waveguide system 100. In this way, the clarity of the local area where the human eye's gaze point is located can be improved on the basis of ensuring the visible range of the augmented reality device, and the clarity of the image can be improved, thereby improving the user experience. Among them, the optical waveguide system 100 and the augmented reality device can refer to the above embodiments.

[0087] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An optical waveguide system, characterized in that: include: A screen assembly, the screen assembly comprising a first screen and a second screen arranged at an interval; a first waveguide having a first outcoupling region; as well as a second waveguide, the second waveguide being arranged on a side of the first waveguide facing the screen assembly, the second waveguide comprising a first coupling-in region, a second coupling-in region and a second coupling-out region which are arranged at intervals, the first coupling-in region and the second coupling-in region being arranged corresponding to light exiting sides of the first screen and the second screen respectively; The light emitted by the first screen passes through the first coupling-in region, passes through the second waveguide, enters the first waveguide, and is transmitted to the first coupling-out region; The light emitted by the second screen enters the second waveguide through the second coupling-in region and is transmitted to the second coupling-out region. The projection of the second coupling-out region on the first waveguide is located in the first coupling-out region.

2. The optical waveguide system according to claim 1, wherein: The second waveguides are provided in plurality, and the plurality of second waveguides are stacked on a side of the first waveguide facing the screen assembly; A plurality of the second coupling-in regions are overlappedly arranged in a stacking direction of a plurality of the second waveguides, and a plurality of the second coupling-out regions are staggeredly arranged in a stacking direction of a plurality of the second waveguides; The second waveguide has a first state and a second state, and when the second waveguide is in the first state, the light received by the second coupling-in region is reflected in the second waveguide to the second coupling-out region; When the second waveguide is in the second state, light received by one of the second coupling-in regions is transmitted within the second waveguide to an adjacent second coupling-in region.

3. The optical waveguide system according to claim 2, wherein: A deflection structure is provided on a side of each of the second waveguides facing away from the screen assembly, and the deflection structure and the second coupling region are arranged opposite to each other; When the second waveguide is in the first state, the deflection structure is powered off to reflect the light transmitted from the second coupling region into the second waveguide, so that the light is reflected in the second waveguide to the second coupling region; When the second waveguide is in the second state, the deflection structure is energized to transmit the light transmitted from the second coupling region into the second waveguide, so that the light is transmitted to the adjacent second waveguide.

4. The optical waveguide system according to claim 3, characterized in that The deflection structure includes a plurality of liquid crystal molecules arranged in an array, and the liquid crystal molecules are used to deflect when powered on.

5. The optical waveguide system according to claim 2, wherein: Projections of a plurality of the second outcoupling regions on the first waveguide cover the entire area of ​​the first outcoupling region.

6. The optical waveguide system according to any one of claims 1 to 5, characterized in that: The field of view angle of the first outcoupling zone ranges from 40° to 50°; And / or, the field of view angle of the second outcoupling region ranges from 15° to 20°; And / or, the first screen and the second screen have the same resolution.

7. The optical waveguide system according to any one of claims 1 to 5, characterized in that: A reflective structure is disposed on a side of the second out-coupling region facing the first out-coupling region, for reflecting light transmitted from the first out-coupling region to the reflective structure.

8. The optical waveguide system according to any one of claims 1 to 5, characterized in that: The optical waveguide system further includes a protective layer, which is disposed on a side of the first waveguide facing away from the screen assembly.

9. An augmented reality device, characterized in that: The augmented reality device comprises the optical waveguide system according to any one of claims 1 to 8.

10. A control method for an augmented reality device, characterized in that: The control method of the augmented reality device is applied to the augmented reality device as claimed in claim 9, wherein the augmented reality device comprises a plurality of second waveguides arranged in a stacked manner, wherein the second waveguides have second coupling-in regions and second coupling-out regions arranged at intervals, wherein the plurality of second coupling-in regions are arranged in an overlapping manner in a stacking direction of the plurality of second waveguides, and the plurality of second coupling-out regions are arranged in a staggered manner in a stacking direction of the plurality of second waveguides; The second waveguide has a first state and a second state. When the second waveguide is in the first state, the light received by the second coupling region is reflected in the second waveguide to the second coupling region. When the second waveguide is in the second state, the light received by the second coupling region is transmitted in the second waveguide to the adjacent second coupling region. The control method of the augmented reality device comprises: Acquire user's gaze point position information, where the gaze point position information is position information of the gaze point of the human eye on the second waveguide; When the position of the gaze point is located in the second outcoupling region of a second waveguide, the second waveguide is controlled to switch to the first state, and the other second waveguides are controlled to switch to the second state.

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