Light emitting system and AR device

Abstract

The utility model provides a light-emitting system and AR (Augmented Reality) equipment. The light emitting system includes: a light source; the light guide element is located on the light emitting side of the light source, the light guide element comprises a base body and a structural layer, the base body is provided with a first surface, a second surface and a third surface, the second surface is located between the first surface and the third surface, and the second surface is a fully reflecting surface; the second surface is used for receiving light transmitted by the first surface and reflecting the light to the third surface, an acute angle is formed between the second surface and the first surface, at least the first surface is provided with a structural layer, the surface of the side, facing the light source, of the structural layer is provided with a protruding part, and the protruding part is opposite to the light source. The light-emitting system solves the problem that a light-emitting system in the prior art is difficult to meet the requirement for small size.

Description

Technical Field

[0001] The utility model relates to the technical field of optical display equipment, and in particular to a light emitting system and an AR device. Background Art

[0002] There are many types of AR devices. Take AR glasses as an example. AR glasses are glasses that can superimpose virtual images with the real world for display, realizing the interaction and integration of virtual and reality. AR glasses are usually equipped with a light-emitting system, and the light-emitting device emits light to the human eye, thereby realizing dynamic tracking, recognition and analysis of the human eye, and can capture the user's line of sight and eye movement in real time.

[0003] The light-emitting system currently used in AR glasses is large in size, which is not conducive to integration into AR glasses, and further not conducive to integration into the temples with limited space. Therefore, how to plan the optical path of the light-emitting system to achieve a small size while ensuring light transmission efficiency has become a difficulty in the current design.

[0004] That is to say, the light emitting system in the prior art has the problem of being difficult to meet the requirement of small volume. Utility Model Content

[0005] The main purpose of the utility model is to provide a light emitting system and an AR device to solve the problem that the light emitting system in the prior art is difficult to meet the small volume requirement.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a light-emitting system is provided, comprising: a light source; a light-guiding element, the light-guiding element being located at the light-emitting side of the light source, the light-guiding element comprising a substrate and a structural layer, the substrate having a first surface, a second surface and a third surface, the second surface being located between the first surface and the third surface, and the second surface being a total reflection surface, the second surface being used to receive light transmitted from the first surface and reflect it to the third surface, the second surface being arranged at an acute angle to the first surface, a structural layer being arranged on at least the first surface, a surface of the structural layer on one side facing the light source having a raised portion, and the raised portion being arranged opposite to the light source.

[0007] Furthermore, there are one or more raised portions, at least one raised portion corresponds to the light source, and the projection area of ​​the raised portion corresponding to the light source on the first surface is smaller than the area of ​​the first surface, and the projection area of ​​the raised portion corresponding to the light source on the second surface is smaller than the area of ​​the second surface.

[0008] Furthermore, the substrate also includes a transition surface, the second surface is connected to the third surface via the transition surface, the transition surface is parallel to the first surface, and the distance between the third surface and the second surface gradually increases in a direction approaching the first surface.

[0009] Furthermore, the light source is a light emitting diode or a vertical cavity surface emitting laser, the light emitting angle of the light source is greater than 0° and less than 20°, and the central wavelength of the light source is greater than or equal to 850nm and less than or equal to 940nm.

[0010] Furthermore, the structural layer is one layer or multiple layers. When the structural layer is one layer, one structural layer is the first structural layer, and the first structural layer is arranged on the first surface; when the structural layer is multiple layers, the multiple structural layers include a second structural layer and a third structural layer, and the second structural layer is arranged on the first surface, and the third structural layer is arranged on the third surface.

[0011] Furthermore, when the structural layer is multi-layered, the third surface is vertically connected to the first surface, and the third surface is arranged at an acute angle to the second surface.

[0012] Further, when the structural layer is multi-layered, a surface of the third structural layer away from the third surface is a convex surface, and the convex surface is an emission surface.

[0013] Furthermore, when the structural layer is one layer, the third surface is arranged at an acute angle with the first surface, and the third surface is a total reflection surface, and the projection of the second surface on the first surface and the projection of the third surface on the first surface are arranged at an interval.

[0014] Further, when the structural layer is a single layer, the first structural layer has two protrusions on the side facing the light source, one of the two protrusions corresponds to the light source and the second surface, and the other of the two protrusions corresponds to the third surface; and / or the substrate is composed of a first part and a second part, the first structural layer is composed of a first sub-structural layer and a second sub-structural layer, the first sub-structural layer is arranged on the first part, and the second sub-structural layer is arranged on the second part.

[0015] According to another aspect of the utility model, an AR device is provided, comprising: a head-mounted frame; a light emitting device, the light emitting device is arranged on the head-mounted frame, the light emitting device comprises a micro-electromechanical galvanometer system and the above-mentioned light emitting system, the micro-electromechanical galvanometer system is located on the light emitting path of the light emitting system, and is used to receive the light of the light emitting system and reflect it into the human eye; a detection device, the detection device is used to receive the light reflected by the human eye.

[0016] Applying the technical solution of the utility model, the light-emitting system includes a light source and a light-guiding element, the light-guiding element is located on the light-emitting side of the light source, the light-guiding element includes a substrate and a structural layer, the substrate has a first surface, a second surface and a third surface, the second surface is located between the first surface and the third surface, and the second surface is a total reflection surface, the second surface is used to receive light transmitted from the first surface and reflect it to the third surface, the second surface is arranged at an acute angle to the first surface, the structural layer is arranged on at least the first surface, the surface of the structural layer on the side facing the light source has a raised portion, and the raised portion is arranged opposite to the light source.

[0017] By setting a structural layer on the first surface, and planning the raised portion of the structural layer to be arranged relative to the light source, the raised portion plays a role of focusing, so that the light emitted by the light source with a divergent angle can be converged into the structural layer through the raised portion, which is conducive to adjusting the angle of the light to form parallel light or approximately parallel light, and at the same time, it can ensure that most of the light from the light source enters the light-guiding element, ensuring the light transmission efficiency, and then incident on the second surface through the transmission of the first surface, by setting the second surface as a total reflection surface and planning the second surface to be arranged at an acute angle with the first surface, so that the second surface can deflect the light transmission direction, realize the folding of the light path, and at the same time can avoid light loss, which is conducive to ensuring the brightness of the light. Then the light is transmitted toward the direction of the third surface and finally emitted. The present application sets the structural composition of the light-guiding element, so that the light emitted by the light source with a divergent angle can be converged and the light path folded in the light-guiding element, which is not only conducive to the output of parallel light, but also can compress the overall volume of the light-emitting system, realize miniaturization, and is conducive to the integration of the light-emitting system in other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 The light path diagram of the light emitting system of the first embodiment of the utility model is shown;

[0020] Figure 2 The light path diagram of the light emitting system of the second embodiment of the utility model is shown;

[0021] Figure 3 The light path diagram of the light emitting system of the third embodiment of the present utility model is shown;

[0022] Figure 4 A light path diagram of a light emitting device of an AR device according to an optional embodiment of the utility model is shown;

[0023] Figure 5 A schematic structural diagram of an AR device according to an optional embodiment of the utility model is shown.

[0024] The above drawings include the following reference numerals:

[0025] 1. light emitting device; 2. detection device; 3. human eye; 4. head-mounted frame; 12. light source; 11. light guide element; 13. micro-electromechanical galvanometer system; 111. substrate; 1111. first surface; 1112. second surface; 1113. third surface; 1114. transition surface; 1115. first surface segment; 1116. second surface segment; 112. first structural layer; 1121. first sub-structural layer; 1122. second sub-structural layer; 113. second structural layer; 114. third structural layer; 115. protrusion; 116. first protrusion; 117. second protrusion; 118. first part; 119. second part. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0029] In order to solve the problem that the light emitting system in the prior art is difficult to meet the requirement of small volume, the utility model provides a light emitting system and an AR device.

[0030] like Figures 1 to 5 As shown, the light-emitting system includes a light source 12 and a light-guiding element 11, the light-guiding element 11 is located on the light-emitting side of the light source 12, the light-guiding element 11 includes a substrate 111 and a structural layer, the substrate 111 has a first surface 1111, a second surface 1112 and a third surface 1113, the second surface 1112 is located between the first surface 1111 and the third surface 1113, and the second surface 1112 is a total reflection surface, the second surface 1112 is used to receive light transmitted from the first surface 1111 and reflect it to the third surface 1113, the second surface 1112 is arranged at an acute angle to the first surface 1111, at least the first surface 1111 is provided with a structural layer, the surface of the structural layer on one side facing the light source 12 has a protrusion 115, and the protrusion 115 is arranged opposite to the light source 12.

[0031] By arranging a structural layer on the first surface 1111, and planning that the raised portion 115 of the structural layer is arranged opposite to the light source 12, the raised portion 115 plays a role of focusing light, so that the light emitted by the light source 12 with a divergent angle can be converged into the structural layer through the raised portion 115, which is conducive to adjusting the angle of the light to form parallel light or approximately parallel light, and at the same time, it can ensure that most of the light from the light source 12 enters the light-guiding element 11, ensuring the light transmission efficiency, and then incident on the second surface 1112 through the transmission of the first surface 1111, by setting the second surface 1112 as a total reflection surface and planning that the second surface 1112 and the first surface 1111 are arranged at an acute angle, so that the second surface 1112 can deflect the light transmission direction, realize the folding of the light path, and at the same time avoid light loss, which is conducive to ensuring the brightness of the light. Then, the light is transmitted toward the direction of the third surface 1113 and finally emitted. The present application sets the structural composition of the light-guiding element 11 so that the light with a divergent angle emitted by the light source 12 can be converged and the light path folded in the light-guiding element 11, which is not only beneficial to the output of parallel light, but also can compress the overall volume of the light-emitting system, achieve miniaturization, and facilitate the integration of the light-emitting system in other devices.

[0032] Specifically, there are one or more ridges 115 on the side of the structural layer facing the light source 12 on the first surface 1111, at least one ridge 115 corresponds to the light source 12, and the projection area of ​​the ridge 115 corresponding to the light source 12 on the first surface 1111 is smaller than the area of ​​the first surface 1111, and the projection area of ​​the ridge 115 corresponding to the light source 12 on the second surface 1112 is smaller than the area of ​​the second surface 1112. And the spot area of ​​the light emitted by the light source 12 irradiating the ridge 115 is smaller than the area of ​​the ridge 115. This arrangement enables most of the light emitted by the light source 12 to be converged by the ridge 115 into the light guide element 11, avoiding the loss of light, and at the same time, it is beneficial for the second surface 1112 to receive most of the light and make the light transmission close to lossless, ensuring the light transmission efficiency while increasing the brightness of the emitted light.

[0033] It should be noted that the raised portion 115 is actually a convex surface.

[0034] like Figure 1 , Figure 2 and Figure 3As shown, the substrate 111 also includes a transition surface 1114, and the second surface 1112 is connected to the third surface 1113 through the transition surface 1114, and the transition surface 1114 is parallel to the first surface 1111, so that the second surface 1112 and the third surface 1113 are arranged opposite to each other, and the distance between the third surface 1113 and the second surface 1112 gradually increases along the direction close to the first surface 1111. The first surface 1111 is connected to the second surface 1112 through the first surface segment 1115, and the first surface segment 1115 is vertically arranged with the first surface 1111. In the present application, the first surface 1111, the second surface 1112, the third surface 1113, the transition surface 1114 and the first surface segment 1115 are all planes. Such a setting is conducive to ensuring the light transmission efficiency and stability between the first surface 1111, the second surface 1112, and the third surface 1113, further ensuring the rationality of the shape of the substrate 111, and ensuring the reliability of the use of the light guide element 11.

[0035] Specifically, the light source 12 is a light emitting diode or a vertical cavity surface emitting laser, and the central wavelength of the light source 12 is greater than or equal to 850nm and less than or equal to 940nm. In practical applications, the central wavelength of the light source 12 is preferably 850nm and 940nm. Since the light emitting system of the present application needs to be applied in eye tracking related equipment, the light emitted by the light source 12 needs to be invisible to the human eye 3, so near-infrared light with a central wavelength of 850nm to 940nm is selected.

[0036] In the present application, the light emitting angle of the light source 12 is greater than 0° and less than 20°. The light emitting angle of the light source 12 should not be too large. If the light emitting angle is too large, the edge light cannot be used, resulting in energy loss. By limiting the light emitting angle of the light source 12 to within 20°, it is beneficial for the light source 12 to be used in small-sized devices, while ensuring the transmission efficiency of the light source 12, which is beneficial for improving brightness and reducing power consumption.

[0037] In different embodiments of the present application, the structural layer is one or more layers. When the structural layer is one layer, the one structural layer is the first structural layer 112, and the first structural layer 112 is disposed on the first surface 1111. When the structural layer is multiple layers, the multiple structural layers include a second structural layer 113 and a third structural layer 114, the second structural layer 113 is disposed on the first surface 1111, the third structural layer 114 is disposed on the third surface 1113, and the second structural layer 113 is different from the first structural layer 112. In this case, the side surface of the third structural layer 114 away from the third surface 1113 can be set as a convex surface, so as to facilitate the emission of parallel light.

[0038] It should be noted that the above-mentioned substrate 111 is transparent and the structural layer is also transparent. The material of the substrate 111 is optical glass or optical plastic, and the structural layer is an adhesive layer, which is convenient for processing the required surface shape of the adhesive layer through the nanoimprint process. The refractive index ratio of the structural layer and the substrate 111 is greater than 1. Regardless of whether the structural layer is one layer or multiple layers, a structural layer is arranged on the first surface 1111, and the second structural layer 113 is different from the first structural layer 112, but the second structural layer 113 and the first structural layer 112 have a protrusion 115 corresponding to the light source 12 on the side facing the light source 12. The light emitted by the light source 12 enters the light-guiding element 11 from the air, and by providing the protrusion 115, the light enters the light-guiding element 11 through the protrusion 115 and becomes parallel light or approximately parallel light. The second surface 1112 is arranged obliquely to the first surface 1111, and the refractive index of the substrate 111 is greater than the refractive index of the air. According to the law of refraction, the second surface 1112 can achieve the total reflection effect of light at a certain inclination angle. And since it does not rely on the reflective film, the light is almost not lost, which increases the brightness of the emitted light. Moreover, since the refractive index of the substrate 111 is greater than the refractive index of the air, and the ridge 115 is arranged at the same time, the substrate 111 itself and the ridge 115 can play a role of convergence, and the longitudinal propagation distance of the light is reduced, which is conducive to compressing the distance between the light source 12 and the light guide element 11, so that the light source 12 is very close to the light guide element 11, which is conducive to reducing the volume of the light-emitting system and reducing the distance between the light source 12 and the light guide element 11. And since the substrate 111 can converge light, when the exit angle is the same, it is conducive to reducing the arrow height of the ridge 115, which is conducive to processing.

[0039] It should also be noted that the light guide element 11 of the present application also includes an anti-reflection film, and the anti-reflection film is provided on the raised portion 115 of the structural layer on the first surface 1111. The anti-reflection film is provided to facilitate the passage of light, reduce the possibility of light reflection, and reduce energy loss. When the third structural layer 114 is provided on the third surface 1113, the anti-reflection film is provided on the side surface of the third structural layer 114 away from the third surface 1113.

[0040] Specifically, the refractive index of the substrate 111 is greater than 1 and less than 5. By reasonably constraining the refractive index of the substrate 111, it is helpful to ensure that the substrate 111 can play a convergence role, so that the range of the light becomes smaller after the light enters the substrate 111. The number of reflections of the light in the substrate 111 is at least once. If the sagittal height of the ridge 115 corresponding to the light source 12 is low to ensure the processing feasibility, and there is no requirement for the beam width, the light can be directly transmitted after being totally reflected by the second surface 1112 to form parallel light, without the need to be totally reflected multiple times in the substrate to finally form an ideal beam.

[0041] The reflective element of the present application can be realized by nano-imprinting, injection molding, mechanical processing and other processes, which can be selected according to actual needs.

[0042] The light emitting system of the present application is described below in conjunction with specific embodiments and drawings.

[0043] Embodiment 1

[0044] like Figure 1 As shown, the lighting system of the first embodiment is described.

[0045] like Figure 1 As shown, the light-emitting system includes a light source 12 and a light-guiding element 11, the light-guiding element 11 includes a substrate 111 and a structural layer, the substrate 111 has a first surface 1111, a second surface 1112, a third surface 1113, a transition surface 1114 and a first surface segment 1115, the second surface 1112 is a total reflection surface, the first surface 1111, the first surface segment 1115, the second surface 1112, the transition surface 1114 and the third surface 1113 are connected in sequence, and the second surface 1112 is used to receive light transmitted from the first surface 1111 and reflect it to the third surface 1113.

[0046] In this embodiment, the second surface 1112 is arranged at an acute angle with the first surface 1111, the second surface 1112 is connected to the transition surface 1114 at an obtuse angle, the third surface 1113 is vertically connected to the first surface 1111, the third surface 1113 and the second surface 1112 are located relative to each other and arranged at an acute angle, and the transition surface 1114 is parallel to the first surface 1111. The structural layer is multi-layered, and the multi-layer structural layer includes a second structural layer 113 and a third structural layer 114. The second structural layer 113 is arranged on the first surface 1111, and the second structural layer 113 completely covers the first surface 1111. The third structural layer 114 is arranged on the third surface 1113, and the projection area of ​​the third structural layer 114 on the third surface 1113 partially covers the third surface 1113. Specifically, the projection area of ​​the third structural layer 114 on the third surface 1113 is less than or equal to the area of ​​the third surface 1113. The second structure layer 113 has a ridge 115 corresponding to the light source 12 on one side of the surface facing the light source 12, and the projection of the ridge 115 on the second surface 1112 is within the range of the second surface 1112. The third structure layer 114 is convex on one side away from the third surface 1113, and the convex surface is the emission surface.

[0047] In this embodiment, an anti-reflection film is provided on the side surface of the third structural layer 114 away from the third surface 1113 and on the protrusion 115. The light emitted by the light source 12 enters the light guide element 11 through the preliminary focusing of the protrusion 115, the purpose of which is to make the angled light emitted by the light source 12 become parallel light or nearly parallel light. Then, after total reflection from the second surface 1112, it enters the third structural layer 114 from the third surface 1113. Since the refractive index of the substrate 111 is greater than 1, the light will also have a convergence effect when it is transmitted in the substrate 111. Then, it is emitted from the convex surface of the third structural layer 114, so that the emitted light beam is parallel light. The number of total reflections of the light in the light guide element 11 is at least 1. If the light becomes parallel light after one total reflection, the third structural layer 114 may not be provided, and it can be directly emitted from the third surface 1113.

[0048] Embodiment 2

[0049] like Figure 2 As shown, the light emitting system of the second embodiment is described.

[0050] The difference between this embodiment and the first embodiment is that the structural layer is one layer, and the angles between the third surface 1113 and the transition surface 1114 and the first surface 1111 are different, and the third surface 1113 is a total reflection surface.

[0051] In this embodiment, the angle between any two surfaces among the first surface 1111, the second surface 1112, the first surface segment 1115, and the transition surface 1114 is the same as that in the first embodiment. The difference is that the base 111 of the light guide element 11 further has a second surface segment 1116, the third surface 1113 is connected to the first surface 1111 through the second surface segment 1116, and the third surface 1113 is connected to the transition surface 1114 at an obtuse angle, and the third surface 1113 is arranged at an acute angle to the first surface 1111. Specifically, the angle between the third surface 1113 and the first surface 1111 is greater than or equal to 40° and less than or equal to 50°. The projection of the second surface 1112 on the first surface 1111 and the projection of the third surface 1113 on the first surface 1111 are arranged at intervals.

[0052] Specifically, one structural layer is the first structural layer 112, and the first structural layer 112 has two raised portions on the side facing the light source 12, and the two raised portions are respectively a first raised portion 116 and a second raised portion 117, the first raised portion 116 corresponds to the light source 12, and the first raised portion 116 also corresponds to the second surface 1112, the second raised portion 117 corresponds to the third surface 1113, and the first raised portion 116 and the second raised portion 117 are arranged at intervals, and the projection areas on the first surface 1111 are the same or different, and the vector heights of the first raised portion 116 and the second raised portion 117 are the same or different.

[0053] like Figure 2 As shown, the light beam emitted by the light source 12 is converged into the light guide element 11 after passing through the first protrusion 116, and then is incident on the third surface 1113 through total reflection on the second surface 1112, and then is emitted downward through total reflection on the third surface 1113, and then is converged and emitted by the second protrusion 117 to form parallel light. The incident light and the emitted light do not affect each other, and the incident light or the emitted light can be changed separately without affecting other light paths, and light with an ideal emission angle and diffusion angle can be obtained by changing the angles of the first protrusion 116, the second protrusion 117, and the third surface 1113.

[0054] Embodiment 3

[0055] like Figure 3 As shown, the light emitting system of the third embodiment is described.

[0056] The difference between this embodiment and the second embodiment is that the light guide element 11 is formed by gluing two parts together. The light guide element 11 of the second embodiment is integrally formed. However, the light guide element 11 of this embodiment is formed by gluing two parts together.

[0057] like Figure 3 As shown, the light guide element 11 of this embodiment is equivalent to the surface cut formed by the line extending from the center of the transition surface 1114 and the center of the first surface 1111 on the basis of the second embodiment. So that the base 111 is divided into a first part 118 and a second part 119. The first structure layer 112 is divided into a first substructure layer 1121 and a second substructure layer 1122. The first substructure layer 1121 is arranged on the first part 118, and the second substructure layer 1122 is arranged on the second part 119. The second substructure layer 1122 has a first protrusion 116, and the first substructure layer 1121 has a second protrusion 117. The third surface 1113 is located on the first part 118, and the second surface 1112 is located on the second part 119. The transition surface 1114 and the first surface 1111 are both divided into two.

[0058] In this embodiment, one or more adhesive layers may be added between the first substructure layer 1121 and the first portion 118, and one or more adhesive layers may be added between the second substructure layer 1122 and the second portion 119, and the refractive index of the adhesive layer is the same as the refractive index of the substrate 111. The light emitted by the light source 12 enters the light guide element 11 through the first protrusion 116, and then enters the second portion 119 through the second substructure layer 1122 and is incident on the second surface 1112. The light enters the first portion 118 through the adhesive position of the first portion 118 and the second portion 119 through total reflection of the second surface 1112, and then enters the third surface 1113. After total reflection of the third surface 1113, it is incident on the first substructure layer 1121, and then converged by the second protrusion 117 on the first substructure layer 1121 to form parallel light.

[0059] like Figure 5 As shown, the present application also provides an AR device, including a head-mounted frame 4, a light-emitting device 1 and a detection device 2, wherein the light-emitting device 1 is arranged on the head-mounted frame 4, as shown in FIG. Figure 4 As shown, the light emitting device 1 includes a micro-electromechanical galvanometer system 13 and the above-mentioned light emitting system. The micro-electromechanical galvanometer system 13 is located on the light emitting path of the light emitting system and is used to receive the light of the light emitting system and reflect it into the human eye 3; the detection device 2 is used to receive the light reflected by the human eye 3.

[0060] In this application, if Figure 5 As shown, the AR device can be an AR glasses, the head-mounted frame 4 can be a frame, which is composed of a frame mounted on the nose and temples, the light emitting device 1 is arranged on the temples and is located on the side of the temples close to the frame, and the detection device 2 is located on the reflection path of the human eye 3. The light emitted by the light source 12 is modulated by the light guide element 11 to emit parallel light, and the parallel light is irradiated onto the human eye 3 through the micro-electromechanical galvanometer system 13, and the micro-electromechanical galvanometer system 13 scans the parallel light emitted by the light emitting system to form light propagating to the human eye 3. The reflected light of the human eye 3 is received by the detection device 2, and the position of the detection device 2 is not limited. By adopting the above-mentioned light emitting system, it is beneficial to ensure the brightness of the light emitting system, and at the same time, the light emitting system can be small in size, low in power consumption and high in brightness, thereby compressing the overall volume and power consumption of the light emitting system, which is beneficial to the integration of the light emitting system in the AR device.

[0061] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0064] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lighting system, characterized in that: include: Light source (12); A light guide element (11), the light guide element (11) being located at the light output side of the light source (12), the light guide element (11) comprising a substrate (111) and a structural layer, the substrate (111) having a first surface (1111), a second surface (1112) and a third surface (1113), the second surface (1112) being located between the first surface (1111) and the third surface (1113), and the second surface (1112) being a total reflection surface, the second surface (1112) being used to receive light transmitted from the first surface (1111) and reflect it to the third surface (1113), the second surface (1112) being arranged at an acute angle to the first surface (1111), the structural layer being arranged on at least the first surface (1111), the surface of the structural layer on one side facing the light source (12) having a raised portion (115), the raised portion (115) being arranged opposite to the light source (12).

2. The lighting system according to claim 1, characterized in that: There are one or more raised portions (115), at least one of which corresponds to the light source (12), and a projection area of ​​the raised portion (115) corresponding to the light source (12) on the first surface (1111) is smaller than an area of ​​the first surface (1111), and a projection area of ​​the raised portion (115) corresponding to the light source (12) on the second surface (1112) is smaller than an area of ​​the second surface (1112).

3. The lighting system according to claim 1, characterized in that: The base (111) further comprises a transition surface (1114), the second surface (1112) is connected to the third surface (1113) via the transition surface (1114), the transition surface (1114) is parallel to the first surface (1111), and the distance between the third surface (1113) and the second surface (1112) gradually increases in a direction approaching the first surface (1111).

4. The lighting system according to claim 1, characterized in that: The light source (12) is a light emitting diode or a vertical cavity surface emitting laser, the light emitting angle of the light source (12) is greater than 0° and less than 20°, and the central wavelength of the light source (12) is greater than or equal to 850 nm and less than or equal to 940 nm.

5. The lighting system according to claim 1, characterized in that: The structural layer is one or more layers. When the structural layer is one layer, the structural layer is a first structural layer (112), and the first structural layer (112) is arranged on the first surface (1111); When the structural layer is multi-layered, the multi-layered structural layer includes a second structural layer (113) and a third structural layer (114), the second structural layer (113) is arranged on the first surface (1111), and the third structural layer (114) is arranged on the third surface (1113).

6. The lighting system according to claim 5, characterized in that: When the structural layer is multi-layered, the third surface (1113) is vertically connected to the first surface (1111), and the third surface (1113) is arranged at an acute angle to the second surface (1112).

7. The lighting system according to claim 5, characterized in that: When the structural layer is multi-layered, a surface of the third structural layer (114) that is away from the third surface (1113) is a convex surface, and the convex surface is an exit surface.

8. The lighting system according to claim 5, characterized in that: When the structural layer is a single layer, the third surface (1113) is arranged at an acute angle with the first surface (1111), and the third surface (1113) is a total reflection surface, and the projection of the second surface (1112) on the first surface (1111) and the projection of the third surface (1113) on the first surface (1111) are arranged at an interval.

9. The lighting system according to claim 5, characterized in that: When the structural layer is one layer, The first structural layer (112) has two raised portions on a side facing the light source (12), one of the two raised portions corresponds to the light source (12) and the second surface, and the other of the two raised portions corresponds to the third surface (1113); and / or The substrate (111) is composed of a first part (118) and a second part (119); the first structural layer (112) is composed of a first sub-structural layer (1121) and a second sub-structural layer (1122); the first sub-structural layer (1121) is arranged on the first part (118), and the second sub-structural layer (1122) is arranged on the second part (119).

10. An AR device, characterized in that: include: Headgear frame (4); A light emitting device (1), wherein the light emitting device (1) is arranged on the head-mounted frame (4), and the light emitting device (1) comprises a micro-electromechanical galvanometer system (13) and a light emitting system according to any one of claims 1 to 9, wherein the micro-electromechanical galvanometer system (13) is located on a light emitting path of the light emitting system and is used to receive light from the light emitting system and reflect it into human eyes; A detection device (2), the detection device (2) is used to receive the light reflected by the human eye.

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