CN112526666B - Augmented reality equipment and light guide structure thereof - Google Patents
Augmented reality equipment and light guide structure thereof Download PDFInfo
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- CN112526666B CN112526666B CN202011466701.6A CN202011466701A CN112526666B CN 112526666 B CN112526666 B CN 112526666B CN 202011466701 A CN202011466701 A CN 202011466701A CN 112526666 B CN112526666 B CN 112526666B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
Abstract
The invention discloses augmented reality equipment and a light guide structure thereof, wherein the light guide structure comprises at least one light guide piece, the first light guide piece comprises a first light guide section and a second light guide section, the first light guide section is connected with the second light guide section, and the first light guide section guides the entering light to the second light guide section; the light guide structure also comprises a first light guide surface and a second light guide surface, wherein the first light guide surface is used for receiving the light guided into the second light guide section from the first light guide section and reflecting the light to the second light guide surface; the second light guide surface is used for reflecting light rays from the first light guide surface to the outside of the second light guide section. The great problem of circumference size that present light guide structure exists can be solved to above-mentioned scheme.
Description
Technical Field
The invention relates to the technical field of optical display, in particular to augmented reality equipment and a light guide structure thereof.
Background
Currently, an augmented reality device generally includes a light source module (e.g., an LED), and realizes functions such as backlight display and status indication based on the light source module. Along with the pursuit of the user to frivolous outward appearance, augmented reality equipment usually selects side light formula leaded light post, also the light that the light source module sent is incident from the side of leaded light post promptly, is leaded light in the leaded light post after by edge outgoing.
In order to ensure that light is mixed at a sufficient distance so that the brightness of emergent light is uniform, the circumferential size (usually, the width size) of the light guide column generally needs to be expanded, which requires that the augmented reality device provides a larger installation space, undoubtedly affects the appearance characteristics of the augmented reality device, and even installation on a compact device is difficult to achieve.
Disclosure of Invention
The invention discloses a side light type light guide structure of a light source module and augmented reality equipment, which are used for solving the problem of larger circumferential dimension of the conventional light guide structure.
In order to solve the problems, the invention adopts the following technical scheme:
in one aspect, the present invention provides a light guide structure for augmented reality devices, the light guide structure including at least one first light guide, the first light guide including a first light guide section and a second light guide section, the first light guide section being connected to the second light guide section, the first light guide section guiding incoming light to the second light guide section;
the light guide structure further comprises a first light guide surface and a second light guide surface, wherein the first light guide surface is used for receiving the light guided into the second light guide section from the first light guide section and reflecting the light to the second light guide surface; the second light guide surface is used for reflecting the light from the first light guide surface to the outside of the second light guide section.
In another aspect, the present invention provides an augmented reality device, which includes the light guide structure.
The technical scheme adopted by the invention can achieve the following beneficial effects:
the light guide structure comprises at least one first light guide part, wherein the first light guide part comprises a first light guide section and a second light guide section which are connected with each other, and the first light guide section guides the entering light into the second light guide section; meanwhile, the light guide structure further comprises a first light guide surface and a second light guide surface, the first light guide surface is used for receiving light rays from the first light guide section to the second light guide section and reflecting the light rays to the second light guide surface, and the second light guide surface is used for reflecting the light rays from the first light guide surface to the outside of the second light guide section, so that the light guide effect of the light guide structure on the light rays is realized.
So set up down, light guide structure has carried out multiple reflection to light through first leaded light face and second leaded light face, can increase the inside mixed light processing stroke of light guide structure undoubtedly under the prerequisite of not expanding light guide structure's circumference size to ensure that the luminance of emergent light keeps evenly.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a light guide structure disclosed in an embodiment of the present invention;
fig. 2 is an exploded schematic view of a light guide structure according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a first light guide according to an embodiment of the disclosure;
fig. 4 is a light guiding schematic diagram of a light guiding structure disclosed in an embodiment of the present invention;
description of reference numerals:
100-light source module, 110-circuit board, 120-luminous body,
200-a first light guide member, 210-a first light guide section, 211-a light incident portion, 212-a third surface, 213-a fourth surface 214-avoidance zone, 220-second light guide section, 221-light exit section, 222-second surface, 223-first surface,
300-a first light reflecting member, 310-a first light guiding portion, 311-a first light guiding surface, 320-a first light reflecting portion, 321-a first light reflecting surface,
400-second light reflecting member, 410-second light guiding portion, 411-second light guiding surface, 420-second light reflecting portion, 421-second light reflecting surface,
500-a second light guide, 510-a light input end, 520-a light output end,
600-light shield, 610-mounting hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 4, an embodiment of the invention discloses a light guide structure for augmented reality equipment, which includes at least one first light guide. It should be understood that the number of the first light guide members of the present embodiment is not limited, and may be one or multiple.
In practical applications, the light guide structure guides light emitted from the light source module 100; the light source module 100 generally uses a point light source or a light source emitting light in a small area, and the uniformity of the light is poor when the light is emitted, so that an obvious light spot is easily generated, and even a lamp explosion phenomenon may occur. In order to obtain a uniform light emitting effect with a predetermined shape, the light emitted from the light source module 100 needs to be mixed. In this embodiment, the first light guide member 200 includes a first light guide section 210 and a second light guide section 220, the first light guide section 210 is connected to the second light guide section 220, and both the first light guide section 210 and the second light guide section 220 can mix light.
In this embodiment, the first light guiding section 210 guides the incoming light to the second light guiding section; generally, one end of the first light guide section 210 is provided with a light incident portion 211, and light emitted from the light source module 100 can be projected into the first light guide member 200 through the light incident portion 211. Specifically, the light source module 100 can emit light, and the light can be emitted into the first light guiding section 210 through the light incident portion 211, and the light mixing process is started in the first light guiding section 210. In general, the light source module 100 may be disposed opposite to the light incident portion 211 for light projection; of course, the light source module 100 may not be disposed opposite to the light incident portion 211, and the light path may be changed by the light distribution structure to project the light to the light incident portion 211, which may be determined according to the structure of the applicable device.
In order to facilitate the light to be guided into the first light guiding member 200, the light incident portion 211 generally has a light incident surface adapted to the guided light, and the embodiment does not limit the specific surface type of the light incident surface, which may be a plane, a curved surface, etc., and generally the light incident surface needs to be perpendicular to most of the light incident surface to ensure the amount of the light incident.
In some embodiments, the light source module 100 may adopt an edge-lit light guiding configuration, and therefore the light incident portion 211 is generally disposed at a side of the light guiding structure, that is, a side of the first light guiding section 210. Meanwhile, the light incident portion 211 is generally a smooth surface, and light can be more smoothly incident into the first light guiding section 210, so that more light enters the first light guiding member 200, the coupling efficiency of light energy can be effectively improved, and the emergent light can be ensured to have higher intensity. Of course, the light incident portion 211 may also be a rough surface, and light can be refracted on the rough surface, so as to generate light with different incident angles, thereby optimizing the light mixing effect.
In the light guide structure of this embodiment, the light needs to be guided or reflected to realize light mixing, in order to enable the light to be guided from the first light guide section 210 to the second light guide section 220 correctly and guided out of the light guide structure by the second light guide section 220, the light guide structure of this embodiment further includes a first light guide surface 311 and a second light guide surface 411, the first light guide surface 311 is used for receiving the light guided into the second light guide section 220 from the first light guide section 210 and reflecting the light to the second light guide surface 411; the second light guide surface 411 is used for reflecting the light from the first light guide surface 311 to the outside of the second light guide section 220.
It should be understood that, with such an arrangement, the light can be projected onto the first light guide surface 311 after being mixed in the first light guide section 210, and the first light guide surface 311 can reflect the light into the second light guide section 220. Meanwhile, the light can be projected onto the second light guiding surface 411 after the light is mixed in the second light guiding section 220, and the second light guiding surface 411 can reflect the light to the outside of the first light guiding member 200. At the moment, the light rays are subjected to long-distance light mixing treatment in the light guide structure, and the light rays are interwoven in the conduction process, so that the effect of uniform mixing is achieved, and finally the emergent light rays have better brightness uniformity.
Fig. 4 shows a light transmission path of light, but the light may also include other light transmission paths, and the content shown in fig. 4 does not limit the light transmission manner of the light guide structure. To illustrate the arrangement of the first light guide surface 311 and the second light guide surface 411, taking the example that the first light guide section 210 extends in the horizontal direction, the first light guide surface 311 may form an included angle of 43 ° to 60 °, preferably 45 °, with the horizontal plane; the second light guide surface 411 may form an included angle of 62 to 69 degrees, preferably 67 degrees, with the horizontal plane. In the light guide path, the light can be directly reflected to the second light guide surface 411 by the first light guide surface 311 according to the angle setting.
One end of the second light guiding section 220, which faces away from the first light guiding section 210, is generally provided with a light outlet portion 221, and light rays can be sequentially guided in the first light guiding section 210 and the second light guiding section 220 and are led out through the light outlet portion 221. After being mixed by the first light guide section 210, the light can be transmitted to the second light guide section 220 for mixing again, so as to ensure a sufficient light mixing distance; after the second light guiding section 220 performs the light mixing process, the second light guiding surface 411 can reflect the light to the light emitting portion 221, and emit the light out of the light guiding structure through the light emitting portion 221, so that the emitted light has better brightness uniformity.
As can be seen from the above description, the light guide structure disclosed in the embodiment of the present invention includes at least one first light guide 200, the first light guide 200 includes a first light guide section 210 and a second light guide section 220 connected to each other, and the first light guide section 210 guides the entering light into the second light guide section 220; meanwhile, the light guide structure further comprises a first light guide surface 311 and a second light guide surface 411, the first light guide surface 311 is used for receiving light rays guided into the second light guide section 220 from the first light guide section 210 and reflecting the light rays to the second light guide surface 411, and the second light guide surface 411 is used for reflecting the light rays from the first light guide surface 311 to the outside of the second light guide section 220, so that the light guide effect of the light guide structure on the light rays is realized.
Under such setting, the light guide structure has carried out multiple reflection to the light through first leaded light face 311 and second leaded light face 411, can increase the inside mixed light processing stroke of light guide structure under the prerequisite of not expanding the circumference size of light guide structure undoubtedly to ensure that the luminance of emergent light keeps evenly.
In some embodiments, the second light guiding section 220 and the first light guiding section 210 may be disposed obliquely, that is, the first light guiding section 210 and the second light guiding section 220 do not extend in the same direction. As shown in fig. 3, taking the first light guiding section 210 extending in the horizontal direction as an example, the second light guiding section 220 may be disposed to extend substantially in the thickness direction of the light guiding structure, and only the length component of the second light guiding section 220 in the horizontal direction will affect the circumferential dimension of the light guiding structure, so that the circumferential dimension of the light guiding structure can be reduced. In the limit, the second light guiding section 220 is perpendicular to the extending direction of the first light guiding section 210, and at this time, the second light guiding section 220 has no extending component in the horizontal direction, so that the circumferential dimension of the light guiding structure can be minimized. Of course, the present embodiment does not limit the specific extending directions of the first light guiding section 210 and the second light guiding section 220, and both can be set according to the actual structural requirements.
There are various connection manners of the first light guiding section 210 and the second light guiding section 220 in this embodiment, for example, the first light guiding section 210 and the second light guiding section 220 are integrally formed, and the second light guiding section 220 is formed by bending at the end of the first light guiding section 210; or, the first light guiding section 210 and the second light guiding section 220 are formed by splicing, and the two have a preset included angle in the penetrating direction thereof.
In order to realize smooth conduction of light in the light guide structure, the light guide structure is usually a light-transmitting structure, and the specific material of the light guide structure is not limited in this embodiment, for example, it may be made of PC (polycarbonate) plastic, PMMA (polymethyl methacrylate) plastic, and the like.
In this embodiment, the specific number of the light guide surfaces of the light guide structure is not limited, that is, the first light guide member 200 may further have a plurality of auxiliary light guide surfaces except the first light guide surface 311 and the second light guide surface 411, and these auxiliary light guide surfaces may guide the light in the first light guide section 210 or the second light guide section 220 and guide the received light back to the inside of the first light guide member 200, so that the light mixing distance inside the light guide structure may be further increased, and the circumferential dimension of the light guide structure may be further reduced.
The first light guide surface 311 and the second light guide surface 411 of this embodiment are disposed in various ways, and generally, the light guide structure can be dotted on the surface to reflect light through the light guide points and ensure the light to be transmitted inside the light guide structure, and the dotted treatment layers face inwards to form the first light guide surface 311 and the second light guide surface 411; or, the light guide structure may be coated with a reflective coating on its surface to form the first light guide surface 311 and the second light guide surface 411; the first light guide surface 311 and the second light guide surface 411 may also be a sandwich structure constructed inside the light guide structure. The formation mechanism of the auxiliary light guide surface is the same as that of the first light guide surface 311 and the second light guide surface 411.
In another embodiment, the light guiding structure of the present embodiment may include a light reflecting component, the light reflecting component includes a first light reflecting member 300 and a second light reflecting member 400, the first light reflecting member 300 is disposed on one side surface of the first light guiding member 200, and the second light reflecting member 400 is disposed opposite to the first light reflecting member 300 and located on the other side surface of the first light guiding member 200. Specifically, the light reflecting assembly may be disposed on an outer surface of the first light guide 200 to prevent light from being emitted from the outer surface of the first light guide 200 and guide the light back to the inside of the first light guide 200. At this time, the specific type of the reflective assembly of the present embodiment is not limited, and the reflective assembly may be specifically composed of one or more of various structural members with light guiding performance, such as a plane mirror, an arc mirror, and a prism.
The first light guide surface 311, the second light guide surface 411 and the auxiliary light guide surface can be arranged on the light reflecting component; for example, the first light guide surface 311 can be disposed on the first light reflecting member 300, and the second light guide surface 411 can be disposed on the second light reflecting member 400.
In a specific implementation manner, the first light reflecting member 300 of the present embodiment includes a first light guiding portion 310, the first light guiding portion 310 has a first light guiding surface 311, the second light guiding section 220 has a first surface 223, and the first light guiding portion 310 is disposed on the first surface 223 through the first light guiding surface 311;
the second light reflecting member 400 includes a second light guiding portion 410, the second light guiding portion 410 has a second light guiding surface 411, the second light guiding section 220 has a second surface 222, and the second light guiding portion 410 is disposed on the second surface 222 through the second light guiding surface 411.
Specifically, when light is transmitted to the connection between the first light guiding section 210 and the second light guiding section 220, the light can be transmitted out of the first light guiding member 200, and at this time, the first light reflecting member 300 located outside the first light guiding member 200 can reflect the light back into the first light guiding member 200, specifically, the light is reflected by the first light guiding surface 311 of the first light guiding portion 310 and enters the second light guiding section 220 through the first surface 223; when the light is transmitted in the second light guiding section 220, the light can be transmitted out of the first light guiding member 200, and then reflected back to the inside of the first light guiding member 200 by the second light reflecting member 400 located outside the first light guiding member 200, specifically, the light is reflected by the second light guiding surface 411 of the second light guiding portion 410 and transmitted into the second light guiding section 220 through the second surface 222; meanwhile, since the second light guiding surface 411 is disposed opposite to the light emitting portion 221, the light is incident into the second light guiding section 220 and then is projected to the light emitting portion 221 for emitting.
First light guide portion 310 and second light guide portion 410 are detachably connected to second light guide section 220 by bonding, clamping, etc., so that replacement and maintenance are facilitated when first light guide portion 310 and second light guide portion 410 are damaged. Meanwhile, by adopting the embodiment, processes such as dotting treatment and coating on the surface of the first light guide member 200 can be reduced, and the cost is further saved.
Further, the first light reflecting member 300 of the present embodiment may further include a first light reflecting portion 320 connected to the first light guiding portion 310, the first light reflecting portion 320 has a first light reflecting surface 321, the first light guiding section 210 has a third surface 212, and the first light reflecting portion 320 covers the third surface 212 through the first light reflecting surface 321;
the second light reflecting member 400 of this embodiment may further include a second light reflecting portion 420 connected to the second light guiding portion 410, the second light reflecting portion 420 has a second light reflecting surface 421, the first light guiding section 210 has a fourth surface 213, and the second light reflecting portion 420 covers the fourth surface 213 through the second light reflecting surface 421; wherein the third surface 212 and the fourth surface 213 are disposed opposite to each other.
Specifically, with such a configuration, when the first light reflecting member 300 is disposed on the first light guiding member 200, not only the light of the first light guiding section 210 can be guided into the second light guiding section 220, but also the light can be prevented from being leaked from the third surface 212 of the first light guiding section 210 by the first light reflecting portion 320, so as to prevent dotting on the third surface 212; when the second light reflecting member 400 is disposed on the first light guiding member 200, not only the light of the second light guiding section 220 can be guided to the light emitting portion 221 and emitted, but also the light can be prevented from leaking from the fourth surface 213 of the first light guiding section 210 by the second light reflecting portion 420, and the dotting process on the fourth surface 213 can be further avoided.
Meanwhile, the first light reflecting part 320 and the second light reflecting part 420 also have the beneficial effect of being convenient to replace and overhaul.
It should be noted that, in this embodiment, no specific limitation is made on the arrangement position and configuration of the third surface 212 and the fourth surface 213, they may be any surface of the first light guiding section 210, or a combination of multiple surfaces, and the arrangement position and configuration of the first light reflecting surface 321 and the second light reflecting surface 421 need to be adjusted accordingly to fit with the third surface 212 and the fourth surface 213, so that the light reaching the first light guiding section 210 is finally prevented from being leaked.
Of course, in the embodiment where the second light guiding section 220 has a leakage, the first light reflecting member 300 and the second light reflecting member 400 may further have corresponding light reflecting portions correspondingly disposed on the surface of the second light guiding section 220, so as to ensure that the light of the second light guiding section 220 is not leaked.
In order to improve the space utilization rate of the light guide structure, in an optional scheme, the first light guide section 210 may be provided with an avoidance area 214, the light source module 100 includes a circuit board 110 and a light emitting body 120 disposed on the circuit board 110, the light emitting body 120 is disposed in the avoidance area 214, and a side wall of the first light guide section 210 surrounding the avoidance area 214 is the light incident portion 211. Specifically, when the light emitting body 120 is disposed in the avoiding region 214, which is equivalent to the light emitting body 120 being embedded in the light guiding structure, the overall occupied space of the light guiding structure and the light source module 100 can be reduced undoubtedly, and of course, the circuit board 110 may also be partially disposed in the avoiding region 214.
In the present embodiment, the avoidance zone 214 can be of various types, for example, it can be a grooved structure. In another specific embodiment, the avoiding region 214 can be a notch, which penetrates through the third surface 212 and the fourth surface 213 of the first light guiding section 210; meanwhile, the circuit board 110 covers the fourth surface 213 and covers the notch, and the light emitter 120 is located in the notch; the first light reflecting portion 320 covers the notch.
It should be understood that, the light source module 100 is disposed in the gap, which is more convenient for the circuit board 110 to extend; meanwhile, the circuit board 110 is disposed on the fourth surface 213, which undoubtedly increases the compactness of the light source module 100 and the light guide structure; moreover, the first light reflecting portion 320 covers the notch, so that the light emitting body 120 in the notch can be protected to a certain extent.
In this embodiment, the light guide structure and the light emitting body 120 are matched in various manners, in an optional scheme, the light guide structure may include a plurality of first light guide members 200, the light source module 100 includes a plurality of light emitting bodies 120, the light emitting bodies 120 are arranged in a row on the circuit board 110, the light guide members 200 are sequentially arranged along the arrangement direction of the light emitting bodies 120, and each avoiding region 214 is provided with at least one light emitting body 120.
With such a configuration, the light source module 100 can provide sufficient light energy to ensure that the light has a better light intensity after exiting. Of course, the specific number of the light emitters 120 in the avoidance area 214 is not limited in this embodiment, and a single light emitter 120 may be disposed in one avoidance area 214, or a plurality of light emitters 120 may be disposed.
Further, two adjacent first light guides 200 may be closely connected. It should be understood that, undoubtedly, a gap between two adjacent first light guide members 200 can be avoided, so that no light leakage occurs between two adjacent first light guide members 200, and the problem of over-brightness or over-darkness between the first light guide members 200 when the whole light guide structure emits light is avoided.
The light incident portion 211 of the present embodiment may be provided with an anti-reflection film, and the anti-reflection film can reduce the reflected light of the light passing through the light incident portion 211, and further increase the amount of light passing through the light incident portion 211, so that the light transmitted into the light guide structure is sufficient.
In order to further optimize the light mixing effect, in an alternative scheme, at least one of the first light guiding surface 311, the second light guiding surface 411, the first light reflecting surface 321, and the second light reflecting surface 421 may be provided with a light mixing layer, that is, one of them may be provided with a light mixing layer, or a plurality of them may be provided with light mixing layers. The light mixing layer is a processing layer with diffuse reflection effect, and may be, for example, a texture layer, a frosted layer, a concave-convex surface layer, etc. Specifically, after being diffusely reflected by the light mixing layer, the light can be further mixed and interwoven, so that a better light mixing treatment effect can be achieved, and the circumferential size of the light guide structure can be further reduced on the premise of ensuring the light emergent uniformity.
Based on the light guide structure, the embodiment of the invention also discloses augmented reality equipment which comprises the light guide structure. The augmented reality device in the embodiment of the present invention may be smart glasses, a smart phone, a wearable device, or the like, and the embodiment of the present invention does not limit the specific type of the augmented reality device.
The augmented reality device comprises a light source module 100, wherein the light source module 100 comprises a circuit board 110 and a luminous body 120 arranged on the circuit board 110, and the luminous body 120 is arranged in an avoidance area 214 of a first light guide section 210; the circuit board 110 is disposed on the fourth surface 213 and covers the avoiding region 214; the first light reflecting portion 320 covers the avoidance zone 214.
Under the general condition, augmented reality equipment includes the casing, and the casing has inner chamber and light-emitting window, inner chamber and light-emitting window intercommunication, and light-directing structure sets up in the inner chamber. The casing is augmented reality equipment's basic component, and it can provide the installation for light guide structure and support the basis, also can play the effect of protection light guide mechanism simultaneously. It should be understood that, after the light emitted from the light source module 100 is guided by the light guide structure, the light can be emitted out of the housing through the light outlet, so as to smoothly realize the light emitting function of the augmented reality device. Specifically, the first light guide 200 can be mounted on an internal support structure of the augmented reality device.
In order to facilitate the installation and fixation of the light guide structure at the light outlet and provide a stable and reliable light outlet effect, in an optional scheme, the light guide structure may further include a second light guide member 500, the second light guide member 500 has a light inlet end 510 and a light outlet end 520, the second light guide member 500 is embedded in the light outlet, the light inlet end 510 is located in the inner cavity, and the light outlet end 520 is at least partially located inside the housing; the light incident end 510 is disposed opposite to the light emergent portion 221.
Specifically, since the light incident end 510 and the light exit end 221 are disposed opposite to each other, after the light is mixed, the light is projected from the light exit end 221 to the light incident end 510 and enters the second light guide 500, and finally exits from the augmented reality device through the light exit end 520. Since the second light guide 500 is embedded in the light outlet, the light can be stably and reliably transmitted. In general, the first light guide member 200 is closely attached to the light incident end 510 of the second light guide member 500 through the light emergent portion 221, but the two light guide members may be disposed at an interval as long as the light is transmitted and projected to the light incident end 510 from the light emergent portion 221.
In this embodiment, the light-emitting end 520 may be disposed entirely inside the housing, or may be disposed partially inside the housing, and another portion may extend out of the housing to be exposed.
In order to ensure that light does not leak in the second light guide member 500, in an optional scheme, the light guide structure may further include a light shielding member 600, the light shielding member 600 has a through mounting hole 610, and the light shielding member 600 is sleeved on the periphery of the second light guide member 500 through the mounting hole 610. It should be understood that, because the light-shielding member 600 is sleeved on the periphery of the second light-guiding member 500 through the mounting hole 610, the light-shielding member 600 can prevent light from being transmitted out from the peripheral outer wall of the second light-guiding member 500, the light can be reflected when being projected to the light-shielding member 600, and the light-shielding member 600 is mixed and processed again, and meanwhile, the light-shielding member 600 also limits the light to be transmitted only in the direction from the light-incident end 510 to the light-exiting end 520, so that the intensity and uniformity of the emitted light can be ensured.
Because the light guide structure and the light source module 100 generate heat in the working process, in order to avoid the influence of the light guide structure and the light source module 100 on normal use or increase power consumption due to overhigh temperature, heat dissipation members can be arranged on the peripheries of the light guide structure and the light source module 100 and are connected with the light guide structure and/or the light source module 100, so that the heat of the light guide structure and the light source module can be conducted to the heat dissipation members and is conducted away by the heat dissipation members. The heat sink typically extends outside the augmented reality device to exchange heat with the outside air.
The heat dissipation member is usually made of a material with silver and aluminum, so that the heat conduction efficiency of the radiator is improved; it may also preferably be a solid structure to further improve heat transfer efficiency. The radiating piece can also be provided with radiating structures such as radiating fins, radiating grooves and the like, and the heat exchange area of the radiating piece can be increased through the radiating structures, so that the radiating function of the radiating piece can be improved to the maximum extent.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (12)
1. An augmented reality device, characterized in that the augmented reality device comprises a light guiding structure comprising at least one first light guide (200), the first light guide (200) comprising a first light guiding section (210) and a second light guiding section (220), the first light guiding section (210) being connected with the second light guiding section (220), the first light guiding section (210) guiding incoming light to the second light guiding section (220); the first light guiding section (210) and the second light guiding section (220) extend in different directions;
the light guide structure further comprises a first light guide surface (311) and a second light guide surface (411), wherein the first light guide surface (311) is used for receiving light rays guided into the second light guide section (220) from the first light guide section (210) and reflecting the light rays to the second light guide surface (411); the second light guide surface (411) is used for reflecting light rays from the first light guide surface (311) to the outside of the second light guide section (220); the first light guide section (210) and the second light guide section (220) carry out light mixing treatment on light;
the augmented reality equipment further comprises a shell, the shell is provided with an inner cavity and a light outlet, the inner cavity is communicated with the light outlet, and the light guide structure is arranged in the inner cavity; the light guide structure further comprises a second light guide member (500), the second light guide member (500) is provided with a light inlet end (510) and a light outlet end (520), the second light guide member (500) is embedded in the light outlet, the light inlet end (510) is located in the inner cavity, and at least part of the light outlet end (520) is located inside the shell; the light inlet end (510) is arranged opposite to the light outlet part of the second light guide section (220).
2. The augmented reality device according to claim 1, wherein one end of the first light guide section (210) is provided with a light incident portion (211), and the light incident portion (211) has a light incident surface adapted to the incident light.
3. Augmented reality device according to claim 2, wherein an end of the second light guiding section (220) facing away from the first light guiding section (210) is provided with the light exit part (221), and light reflected by the second light guiding surface (411) passes through the light exit part (221).
4. Augmented reality device according to claim 3, wherein the first light guiding surface (311) and the second light guiding surface (411) are both rough surfaces.
5. Augmented reality device according to claim 3, wherein the first light guide (200) further has a plurality of auxiliary light guide surfaces that guide the light it receives back to the inside of the first light guide (200).
6. The augmented reality device of claim 5, wherein the light guide structure further comprises a light reflecting assembly, the light reflecting assembly comprises a first light reflecting member (300) and a second light reflecting member (400), the first light reflecting member (300) is disposed on one side surface of the first light guide member (200), and the second light reflecting member (400) is disposed opposite to the first light reflecting member (300) and is located on the other side surface of the first light guide member (200).
7. Augmented reality device according to claim 6, wherein the first light reflecting member (300) comprises a first light guiding part (310), the first light guiding part (310) having the first light guiding surface (311), the second light guiding section (220) having a first surface (223), the first light guiding part (310) being arranged on the first surface (223) by the first light guiding surface (311);
the second light reflecting member (400) includes a second light guiding portion (410), the second light guiding portion (410) has a second light guiding surface (411), the second light guiding section (220) has a second surface (222), and the second light guiding portion (410) is disposed on the second surface (222) through the second light guiding surface (411).
8. Augmented reality device according to claim 7, wherein the first light reflecting element (300) further comprises a first light reflecting portion (320) connected to the first light guiding portion (310), the first light reflecting portion (320) having a first light reflecting face (321), the first light guiding section (210) having a third surface (212), the first light reflecting portion (320) being applied to the third surface (212) by the first light reflecting face (321);
the second light reflecting member (400) further comprises a second light reflecting portion (420) connected to the second light guiding portion (410), the second light reflecting portion (420) has a second light reflecting surface (421), the first light guiding section (210) has a fourth surface (213), and the second light reflecting portion (420) covers the fourth surface (213) through the second light reflecting surface (421); the third surface (212) and the fourth surface (213) are arranged back on the first light guiding section (210).
9. Augmented reality device according to claim 8, wherein the first light guiding section (210) is provided with an avoidance zone (214), the avoidance zone (214) being a gap, the avoidance zone (214) passing through the third surface (212) and the fourth surface (213) of the first light guiding section (210).
10. Augmented reality device according to claim 9, wherein a light mixing layer is provided at least one of the first light guiding surface (311), the second light guiding surface (411), the first light reflecting surface (321) and the second light reflecting surface (421).
11. The augmented reality device of claim 8, wherein the augmented reality device comprises a light source module (100), the light source module (100) comprises a circuit board (110) and a light emitter (120) arranged on the circuit board (110), and the light emitter (120) is arranged in the avoidance zone (214) of the first light guide section (210); the circuit board (110) is arranged on the fourth surface (213) in an overlaying mode and covers the avoidance area (214); the first light reflecting portion (320) covers the avoidance region (214).
12. The augmented reality device of claim 1, wherein the light guide structure further comprises a light shielding member (600), the light shielding member (600) has a through mounting hole (610), and the light shielding member (600) is sleeved on the periphery of the second light guide member (500) through the mounting hole (610).
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