Display device and wearable display apparatus

Abstract

The invention discloses a display device and wearable display equipment, and relates to the technical field of wearable display equipment.The display device comprises a light emitting assembly and an optical assembly, and the light emitting assembly is used for emitting light beams; the optical assembly comprises a coupling-in part and a coupling-out part, the coupling-in part is located on a light emitting path of the light emitting assembly, and two opposite surfaces of the coupling-out part are respectively provided with a first coupling-out area and a second coupling-out area; the coupling-in part is used for receiving the light beam emitted by the light emitting assembly and transmitting the light beam to the coupling-out part so that the inner display light beam can be emitted through the first coupling-out area or the outer display light beam can be emitted through the second coupling-out area. According to the technical scheme, the display device with an external display function and an internal display function can be provided.

Description

Technical Field

[0001] This invention relates to the field of wearable display device technology, and particularly to a display device and a wearable display device. Background Technology

[0002] In related technologies, the main function of wearable display devices is internal display, used to show corresponding information to the user after the user wears the device. However, after the user removes the wearable display device, since the device cannot display externally, the user cannot obtain relevant display information when not wearing the device. Summary of the Invention

[0003] The main objective of this invention is to provide a display device and a wearable display device, which aims to provide a display device that has both external display function and internal display function.

[0004] To achieve the above objectives, the present invention provides a display device comprising:

[0005] A light-emitting component, wherein the light-emitting component is used to emit a light beam;

[0006] An optical component, comprising an insertion part and an exit part, wherein the insertion part is located on the light emission path of the light emission component, and the two opposite surfaces of the exit part are respectively provided with a first exit area and a second exit area;

[0007] The coupling section is used to receive the light beam emitted by the light emitting component and transmit the light beam to the coupling section so as to emit an internal display light beam through the first coupling area or emit an external display light beam through the second coupling area.

[0008] In one embodiment, the optical component includes:

[0009] Base;

[0010] A coupling grating, wherein the coupling grating is disposed on the substrate and is used to form the coupling portion; and

[0011] Two coupling gratings are disposed on opposite surfaces of the substrate to form the first coupling region and the second coupling region, respectively.

[0012] In one embodiment, the coupling grating includes a first coupling portion and a second coupling portion, wherein the first coupling portion is used to modulate the light beam emitted by the light emitting component into a first light beam, and the second coupling portion is used to modulate the light beam emitted by the light emitting component into a second light beam.

[0013] The two coupled gratings are respectively configured to emit the first beam and the second beam.

[0014] In one embodiment, the first coupling portion and the second coupling portion are disposed at a distance from each other on one side surface of the substrate.

[0015] In one embodiment, the light-emitting component has a first light-emitting path toward the first coupling portion and a second light-emitting path toward the second coupling portion, and the light-emitting component is used to alternately emit light beams along the first light-emitting path and the second light-emitting path.

[0016] In one embodiment, two light-emitting components are provided, and the two light-emitting components are respectively disposed opposite to the first coupling part and the second coupling part, for emitting light beams to the first coupling part and the second coupling part respectively.

[0017] In one embodiment, the two coupled gratings are arranged opposite each other along the normal direction of the substrate.

[0018] In one embodiment, the internal display beam is a parallel beam; or, the internal display beam is a converging beam, and the emission angle of the internal display beam is in the range of 0° to 15°.

[0019] In one embodiment, the external display beam is a parallel beam; or, the external display beam is a diffuse beam, and the emission angle of the external display beam is in the range of 0° to 35°.

[0020] The present invention also proposes a wearable display device, comprising the display device described in any one of the foregoing claims, wherein the display device includes:

[0021] A light-emitting component, wherein the light-emitting component is used to emit a light beam;

[0022] An optical component, comprising an insertion part and an exit part, wherein the insertion part is located on the light emission path of the light emission component, and the two opposite surfaces of the exit part are respectively provided with a first exit area and a second exit area;

[0023] The coupling section is used to receive the light beam emitted by the light emitting component and transmit the light beam to the coupling section so as to emit an internal display light beam through the first coupling area or emit an external display light beam through the second coupling area.

[0024] The display device of the present invention includes a light-emitting component and an optical component. The optical component includes an insertion portion and an exit portion. The two opposite surfaces of the exit portion are respectively provided with a first exit region and a second exit region. The insertion portion is located on the light-emitting path of the light-emitting component and is used to receive the light beam emitted by the light-emitting component and to transmit the light beam to the exit portion. The exit portion can emit an internal display beam through the first exit region or an external display beam through the second exit region. Therefore, the display device can have both external display function and internal display function. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of an embodiment of the display device provided by the present invention;

[0027] Figure 2 for Figure 1 A partial structural diagram of the display device;

[0028] Figure 3 for Figure 1 A partial structural schematic diagram of another embodiment of the display device.

[0029] Explanation of icon numbers:

[0030] 100, Display device; 10, Light emitting assembly; 10a, First light emitting assembly; 10b, Second light emitting assembly; 20, Optical assembly; 21, Substrate; 22, Coupling grating; 221, First coupling portion; 222, Second coupling portion; 23a, First coupling grating; 23b, Second coupling grating.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] In related technologies, the main function of wearable display devices is internal display, used to show corresponding information to the user after the user wears the device. However, after the user removes the wearable display device, since the device cannot display externally, the user cannot obtain relevant display information when not wearing the device.

[0036] The present invention proposes a display device 100.

[0037] Please see Figure 1 In one embodiment of the present invention, the display device 100 includes:

[0038] Light-emitting component 10, the light-emitting component 10 being used to emit a light beam;

[0039] Optical component 20, the optical component 20 includes a coupling-in part and a coupling-out part, the coupling-in part is located on the light emission path of the light emission component 10, and the two opposite surfaces of the coupling-out part are respectively provided with a first coupling-out area and a second coupling-out area;

[0040] The coupling section is used to receive the light beam emitted by the light emitting component 10 and transmit the light beam to the coupling section so as to emit an internal display light beam through the first coupling area or emit an external display light beam through the second coupling area.

[0041] The optical component 20 is used to transmit light and has an input section for receiving incident light and an output section for projecting light out. The optical component 20 can be configured as an optical waveguide or other optical component with light transmission function. The input and output sections of the optical component 20 can be arranged side by side in the same straight direction, or they can be arranged according to other spatial orientations, which are not limited here.

[0042] The light-emitting component 10 can be configured as a display optical engine. The coupling portion of the optical component 20 is located on the light-emitting path of the display optical engine and is used to receive the light beam emitted by the display optical engine. This allows the light beam emitted by the display optical engine to first enter through the coupling portion and, after being transmitted through the optical component 20, to exit from either of the two opposing surfaces of its coupling portion. The light beam emitted by the light-emitting component 10 toward the coupling portion can be parallel light or diffused light. In one feasible embodiment, the beam emission angle of the light-emitting component 10 is limited to 0° to 10°. Specifically, the angle between the emission direction of the light-emitting component 10 and the normal direction of the substrate 21 is defined as the beam emission angle of the light-emitting component 10. This emission angle can be 0°, 5°, 10°, or any value within the range of 0° to 10°, to ensure that the light beam emitted by the light-emitting component 10 enters the optical component 20 through the coupling portion.

[0043] Specifically, one surface of the optical component 20 is designated as a first surface, and the other surface as a second surface. The coupling portion of the optical component 20 has a coupling area on the first surface, and the coupling portion of the optical component 20 has a first coupling area and a second coupling area on the first and second surfaces, respectively. With this configuration, the optical component 20 can receive incident light through the coupling area of ​​the first surface and transmit the light to the coupling portion. The light then exits through the first coupling area on the first surface as an internal display beam, which is projected inwards by the display device 100. This allows users to directly obtain relevant display information through the internal display beam when wearing a wearable display device. Alternatively, after the light is transmitted to the coupling portion, it can also exit through the second coupling area on the second surface as an external display beam, which is projected outwards by the display device 100. This allows users to directly obtain relevant display information through the external display beam when not wearing a wearable display device.

[0044] Therefore, it can be understood that, since the display device 100 of the present invention includes a light-emitting component 10 and an optical component 20, and the optical component 20 includes an insertion portion and an exit portion, and the two opposite surfaces of the exit portion are respectively provided with a first exit region and a second exit region. After receiving the light beam emitted by the light-emitting component 10 through the insertion portion, the light beam can be transmitted to the exit portion to emit an internal display beam through the first exit region or an external display beam through the second exit region. Therefore, the display device 100 can have both external display function and internal display function, so that users can obtain relevant display information regardless of whether they are wearing wearable display devices, thereby improving the practicality of wearable display devices and enhancing user experience.

[0045] Please see Figure 1 In an embodiment of the present invention, the optical component 20 includes:

[0046] Base 21;

[0047] A coupling grating 22, disposed on the substrate 21, is used to form the coupling portion; and

[0048] Two coupling gratings are disposed on opposite surfaces of the substrate 21 to form the first coupling region and the second coupling region, respectively.

[0049] The substrate 21 can be a dielectric waveguide, which is generally planar and has two opposing surfaces. In other embodiments, the substrate 21 can also be cylindrical or other shapes, and the specific implementation can be designed according to the product to which it is applied. The material of the substrate 21 can be epoxy resin or other organic materials, or inorganic materials such as heavy flint glass, and is not limited thereto.

[0050] Furthermore, the optical component 20 also includes a coupling grating 22, which is disposed on one side surface of the substrate 21 to form a coupling portion of the optical component 20. The coupling grating 22 can change the incident angle of the incident light entering the interior of the substrate 21, thereby making the incident angle greater than or equal to a critical angle, so that the light can be coupled into the substrate 21 and undergo total internal reflection within the substrate 21 to transmit through the substrate 21 to the coupling portion.

[0051] The optical component 20 also includes a coupling grating. When light rays coupled into the substrate 21 by the coupling grating 22 strike the coupling grating, their incident angle can be deflected again. For example, the incident angle may be less than the critical angle for total internal reflection, allowing the incident light to pass through the substrate 21 and thus exit through the coupling grating to form a display beam for human eyes. Specifically, the optical component 20 has two coupling gratings, which are respectively disposed on opposite surfaces of the substrate 21 to form a first coupling region and a second coupling region. This allows the optical component 20 to have opposing display beam emission directions, enabling the inner and outer display beams to exit through the two coupling gratings respectively. The two coupling gratings can be arranged opposite each other in the normal direction of the substrate, or they can be staggered; this is not limited here.

[0052] The coupling-in grating 22 or the coupling-out grating can be attached to the substrate 21 as a separate optical element, or the structure of the coupling-in grating 22 or the coupling-out grating can be formed in the corresponding area of ​​the substrate 21. The specific implementation can be set according to actual needs and is not limited here.

[0053] It should be noted that when the input grating 22 and the output grating satisfy a special correspondence, the light beam emitted from the light-emitting component 10, after passing through the input grating 22 and incident on the substrate 21, can be emitted as a display beam through the corresponding output grating. This special correspondence means that there is a unique correspondence between the grating parameters of the input grating 22 and the output grating, such as the grating period, duty cycle, slot depth, and sidewall tilt angle. Only when this unique correspondence is satisfied can the output grating normally emit the light beam modulated by the corresponding input grating 22.

[0054] Based on this, please refer to Figure 2 In one embodiment of the present invention, the coupling grating 22 includes a first coupling portion 221 and a second coupling portion 222. The first coupling portion 221 is used to modulate the light beam emitted by the light emitting component 10 into a first light beam, and the second coupling portion 222 is used to modulate the light beam emitted by the light emitting component 10 into a second light beam. The two coupling gratings are respectively configured to emit the first light beam and the second light beam.

[0055] In this embodiment, the optical component 20 includes a coupling grating 22, which comprises a first coupling portion 221 and a second coupling portion 222. The grating parameters of the first coupling portion 221 and the second coupling portion 222 differ to satisfy a specific correspondence with the first coupling grating 23a and the second coupling grating 23b, respectively. Specifically, the first coupling grating 23a is used to engage with the first coupling portion 221 of the coupling grating 22, and the second coupling grating 23b is used to engage with the second coupling portion 222 of the coupling grating 22. With this configuration, when the light beam from the light-emitting component 10 is incident only on the first coupling portion 221, the display device 100 can emit an inward display beam through the optical component 20, while when the light beam from the light-emitting component 10 is incident only on the second coupling portion 222, the display device 100 can project an outward display beam through the optical component 20. This configuration allows for control of the light emission direction of the display device 100. For example, when a user wears the wearable display device, the display device 100 can be controlled to emit an internal display beam; when the user removes the wearable display device, the display device 100 can be controlled to emit an external display beam. By controlling the light emission path of the display device 100, it can be adapted to different usage scenarios.

[0056] Furthermore, when the light-emitting component 10 emits a light beam toward the first coupling portion 221 and the second coupling portion 222, it can output the same image information to the first coupling portion 221 and the second coupling portion 222, so that the inner display beam and the outer display beam are used to display the same information content. Of course, when the light-emitting component 10 emits a light beam toward the first coupling portion 221 and the second coupling portion 222, it can also output different image information to the first coupling portion 221 and the second coupling portion 222, so that the inner display beam and the outer display beam are used to display different information content, which is not limited here.

[0057] In another embodiment, the optical component 20 may also have two coupling gratings 22, which are arranged side by side on one side surface of the substrate 10 of the optical component 20. The grating parameters of the two coupling gratings 22 are different, so as to satisfy a special correspondence with the first output grating 23a and the second output grating 23b, respectively. Therefore, by controlling the light emitting component 10 to emit light beams to different coupling gratings 22, the display device 100 can emit corresponding internal and external display light beams.

[0058] It should be noted that in the aforementioned embodiments, the two coupling gratings of the optical component 20 can both be disposed on the same side of the coupling section. When the light beam emitted from the light-emitting component 10 is transmitted to the coupling grating 22 of the coupling section, it can be transmitted to the two coupling gratings on the substrate 10 respectively, so as to be emitted as inner and outer display beams through the two coupling gratings. In this arrangement, the propagation paths of the inner and outer display beams in the optical component 20 partially overlap. By controlling the light-emitting component 10 to emit a beam separately to the first coupling section 221 or the second coupling section 222, the simultaneous transmission of the inner and outer display beams in the optical component 20 can be avoided, which would cause them to interfere with each other during transmission and affect the display effect of the display device 100.

[0059] Of course, the technical solution of the present invention is not limited thereto. In one feasible embodiment, after the light beam emitted by the light-emitting component 10 is transmitted to the coupling grating 22 of the coupling part, the propagation paths of the inner and outer display beams within the optical component 20 can be set separately. For example, the two coupling gratings of the optical component 20 can be respectively set on both sides of the coupling part. In this arrangement, the light-emitting component 10 can be controlled to emit a light beam separately to the first coupling part 221 or the second coupling part 222, so that the display device 100 emits an inner display beam or an outer display beam separately. Alternatively, the light beam emitted by the light-emitting component 10 can be controlled to simultaneously enter the first coupling part 221 and the second coupling part 222, so that the display device 100 can simultaneously emit an inner display beam inward and project an outer display beam outward. Specific implementations can be set according to actual needs and are not limited here.

[0060] In an embodiment of the present invention, the first coupling portion 221 and the second coupling portion 222 can be disposed on one side surface of the substrate 21. By disposing the first coupling portion 221 and the second coupling portion 222 on the same side surface of the substrate 21, when only one light-emitting component 10 is provided, the light-emitting component 10 can be disposed on one side of the substrate 21 and disposed opposite to the coupling grating 22, so as to alternately emit light beams to the first coupling portion 221 and the second coupling portion 222, thereby forming inner and outer display beams respectively through the light beam emitted by a single light-emitting component 10.

[0061] Specifically, please refer to Figure 2 In one embodiment of the present invention, the light emitting component 10 has a first light emitting path toward the first coupling portion 221 and a second light emitting path toward the second coupling portion 222, and the light emitting component 10 is used to alternately emit light beams along the first light emitting path and the second light emitting path.

[0062] In this embodiment, when the display device 100 is operating normally, the light-emitting component 10 can emit light beams towards the first coupling portion 221 and the second coupling portion 222 through the first light-emitting path and the second light-emitting path, respectively, so that the light beams can couple into the substrate 21 and be emitted outward through the first coupling region and the second coupling region, respectively. At this time, the light-emitting component 10 can emit light of either internal display or external display, so that the display device 100 outputs corresponding display information. When it is necessary to adjust the display type, the light-emitting component 10 can adjust the current light-emitting path to switch the position of the corresponding displayed image incident on the coupling grating 22.

[0063] The light-emitting assembly 10 may have a first light-emitting region and a second light-emitting region arranged side by side, which can be used to alternately emit light beams. The first light-emitting region and the first coupling portion 221 are arranged opposite each other, and the light emitted from the first light-emitting region can be emitted towards the first coupling portion 221 along a first light-emitting path. The second light-emitting region and the second coupling portion 222 are arranged opposite each other, and the light emitted from the second light-emitting region can be emitted towards the second coupling portion 222 along a second light-emitting path.

[0064] Of course, the technical solution of the present invention is not limited to this. In some embodiments, the relative positional relationship between the light-emitting component 10 and the coupling grating 22 can be adjusted so that the light beam emitted by the light-emitting component 10 can be transmitted to the first coupling part 221 and the second coupling part 222 respectively. For example, the light-emitting component 10 can be movably arranged and has a first light-emitting position and a second light-emitting position. When the light-emitting component 10 is in the first light-emitting position, it is arranged opposite to the first coupling part 221 to emit a light beam along the first light-emitting path toward the first coupling part 221; when the light-emitting component 10 is in the second light-emitting position, it is arranged opposite to the second coupling part 222 to emit a light beam along the second light-emitting path toward the first coupling part 222. Alternatively, the position of the light-emitting component 10 can remain unchanged, and a light guide structure can be provided between the light-emitting component 10 and the optical component 20. The light guide structure can adjust the propagation path of the light beam emitted from the light-emitting component 10, so that the light beam emitted from the light-emitting component 10 is transmitted to the first coupling part 221 or the second coupling part 222 along the first light-emitting path or the second light-emitting path, respectively. The specific implementation can be set according to actual needs and is not limited here.

[0065] Please see Figure 3 In another embodiment of the present invention, two light-emitting components 10 are provided, and the two light-emitting components 10 are respectively disposed opposite to the first coupling part 221 and the second coupling part 222, for emitting light beams to the first coupling part 221 and the second coupling part 222 respectively.

[0066] In this embodiment, the two light-emitting components 10 are designated as a first light-emitting component 10a and a second light-emitting component 10b. When the display device 100 is operating normally, the first light-emitting component 10a and the second light-emitting component 10b can emit light of internal display and external display types respectively toward the first coupling portion 221 and the second coupling portion 222, and cause the light beams of the coupled substrate 21 to be emitted outward through the first coupling portion and the second coupling portion respectively, so that the display device 100 outputs the corresponding internal display and external display information respectively. When it is necessary to adjust the display type, the working state of the corresponding light-emitting component 10 can be adjusted. For example, when it is necessary for the display device 100 to emit only the internal display light beam, the first light-emitting component 10a is controlled to emit the light beam only toward the first coupling portion 221, and the second light-emitting component 10b stops emitting light outward; or, when it is necessary for the display device 100 to emit only the external display light beam, the second light-emitting component 10b is controlled to emit the light beam only toward the second coupling portion 221, and the first light-emitting component 10b stops emitting light outward. The same applies to adjustments for other display types, and will not be elaborated upon here.

[0067] It should be noted that when two light-emitting components 10 are provided, the two light-emitting components 10 can be integrated and disposed on one side of the substrate 21, which is beneficial to improving the structural compactness of the display device 100 and thus reducing the volume occupied by the display device 100. Of course, the technical solution of the present invention is not limited to this. In some embodiments, when two light-emitting components 10 are provided, the first coupling part 221 and the second coupling part 222 can be disposed on the two side surfaces of the substrate 21, and the two light-emitting components 10 can be disposed on opposite sides of the substrate 21, so that the two light-emitting components 10 are respectively disposed corresponding to the first coupling part 221 and the second coupling part 222. The number and placement of the light-emitting components 10 can be set according to actual needs and are not limited here.

[0068] Furthermore, in some embodiments, the wearable display device is equipped with a wear detection sensor to detect whether the wearable display device is currently worn or not. Specifically, when the wear detection sensor detects that the wearable display device is currently worn, it controls the display device 100 of the wearable display device to emit an inner display beam through a first coupling area, allowing the user to directly obtain relevant display information through the inner display beam of the display device 100; when the wear detection sensor detects that the wearable display device is currently not worn, it controls the display device 100 to emit an outer display beam through a second coupling area, allowing the user to directly obtain relevant display information through the outer display beam projected by the display device 100. In this way, the light emission direction of the display device 100 can be controlled according to whether the wearable display device is worn, which helps to improve the ease of use and practicality of the wearable display device.

[0069] Please see Figure 1 In an embodiment of the present invention, the two coupling gratings are arranged opposite each other along the normal direction of the substrate 21. This arrangement allows for the centralized arrangement of the two coupling gratings, which helps to reduce the volume occupied by the optical component 20.

[0070] In an embodiment of the present invention, the internal display beam is a parallel beam; or, the internal display beam is a converging beam, and the emission angle of the internal display beam is in the range of 0° to 15°.

[0071] The internal display beam can be transmitted to the human eye via a self-coupling grating in the form of parallel light or as a converging light. By configuring the internal display beam as a converging light, it is easier for the internal display beam to be coupled out to the human eye and received by the eye. Therefore, the emission angle range of the internal display beam can be limited to 0° to 15°. Specifically, the angle between the emission direction of the internal display beam and the normal direction of the substrate 21 is defined as the emission angle of the internal display beam. This emission angle can be 0°, 5°, 10°, 15°, or any value within 0° to 15°, to ensure the coupling effect of the internal display beam.

[0072] In an embodiment of the present invention, the external display beam is a parallel beam; or, the external display beam is a diffuse beam, and the emission angle of the external display beam is in the range of 0° to 35°.

[0073] The external display beam can project externally either as parallel light emitted from the self-coupling grating or as convergent light emitted from the outside. Configuring the external display beam as diffused light increases the projection area of ​​the display device 100. Therefore, the emission angle of the external display beam can be limited to 0°–35°. Specifically, the emission angle of the external display beam is defined as the angle between the emission direction of the external display beam and the normal direction of the substrate 21. This emission angle can be 0°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, or any value within the range of 0°–35°, to ensure the coupling effect of the external display beam.

[0074] The present invention also proposes a wearable display device, which includes a display device 100. The specific structure of the display device 100 is as described in the above embodiments. Since the wearable display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0075] The wearable display device can be specifically configured as an augmented display wearable product, such as AR glasses, or as other types of wearable products, without limitation here.

[0076] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A display device, characterized in that, include: A light-emitting component, wherein the light-emitting component is used to emit a light beam; An optical component, comprising an insertion part and an exit part, wherein the insertion part is located on the light emission path of the optical component, and the two opposite surfaces of the exit part are respectively provided with a first exit area and a second exit area; The coupling section is used to receive the light beam emitted by the light emitting component and transmit the light beam to the coupling section so as to emit an internal display light beam through the first coupling area or emit an external display light beam through the second coupling area.

2. The display device as claimed in claim 1, characterized in that, The optical components include: Base; A coupling grating, wherein the coupling grating is disposed on the substrate and is used to form the coupling portion; and Two coupling gratings are disposed on opposite surfaces of the substrate to form the first coupling region and the second coupling region, respectively.

3. The display device as claimed in claim 2, characterized in that, The coupling grating includes a first coupling part and a second coupling part. The first coupling part is used to modulate the light beam emitted by the light emitting component into a first light beam, and the second coupling part is used to modulate the light beam emitted by the light emitting component into a second light beam. The two coupled gratings are respectively configured to emit the first beam and the second beam.

4. The display device as claimed in claim 3, characterized in that, The first coupling portion and the second coupling portion are disposed at a distance on one side surface of the substrate.

5. The display device as claimed in claim 4, characterized in that, The light-emitting component has a first light-emitting path toward the first coupling portion and a second light-emitting path toward the second coupling portion, and the light-emitting component is used to alternately emit light beams along the first light-emitting path and the second light-emitting path.

6. The display device as claimed in claim 4, characterized in that, Two light-emitting components are provided, and the two light-emitting components are respectively arranged opposite to the first coupling part and the second coupling part, and are used to emit light beams to the first coupling part and the second coupling part respectively.

7. The display device as claimed in claim 2, characterized in that, The two coupled gratings are arranged opposite each other along the normal direction of the substrate.

8. The display device as claimed in any one of claims 1 to 7, characterized in that, The internal display beam is a parallel beam; or, the internal display beam is a converging beam, and the emission angle of the internal display beam is in the range of 0° to 15°.

9. The display device as claimed in any one of claims 1 to 7, characterized in that, The external display beam is a parallel beam; or, the external display beam is a diffuse beam, and the emission angle of the external display beam is in the range of 0° to 35°.

10. A wearable display device, characterized in that, Includes the display device as described in any one of claims 1 to 9.

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