Optical machine assembly for wearable device and intelligent head-mounted device

Abstract

The utility model discloses an optical machine assembly for wearable equipment and intelligent head-mounted equipment. The optical machine assembly comprises an optical machine; the fixing piece is fixedly connected with a shell of the wearable equipment, the fixing piece comprises a fixing ring, and the fixing ring is arranged on the periphery of the optical machine in a sleeving mode; and the heat dissipation mechanism abuts against the ray machine and is fixedly connected with the fixing piece. According to the light machine assembly provided by the embodiment of the invention, the light machine assembly can improve the heat dissipation effect of the light machine through a simple structure by arranging the fixing piece with the fixing ring located at the periphery of the light machine and the heat dissipation mechanism connected with the fixing piece and the light machine.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to the technical field of intelligent devices. More particularly, the present disclosure relates to a light-mechanism assembly for a wearable device and a smart head-mounted device. BACKGROUND

[0002] The current intelligent process of consumer electronics is accelerating, and smart glasses, as the next generation of smart terminals with great potential, are expected to provide information anytime and anywhere, assist decision-making, and be comfortable to wear, which creates a broad market space for AI smart glasses. With the increasing demand for intelligent device functions, display effect becomes a key factor. Traditional display technology has been difficult to meet the needs of users for high-quality visual experience in terms of resolution, brightness, contrast, and especially in complex environments such as outdoor strong light. At the same time, thinness and long battery life are crucial for portable devices such as smart glasses. Display technologies such as Micro LED meet the dual demands of display performance and portability of smart glasses with high brightness, high contrast, high resolution, and low power consumption, and become the core display technology to promote the development of AI smart glasses. However, the display light mechanism of smart glasses as a core component will generate a large amount of heat during operation due to various factors, for example, the heat generated when the internal chip of the Micro LED display light mechanism drives the tiny LED pixels to emit light. If it cannot be dissipated in time, it will seriously affect the performance and user experience of smart glasses. High temperature will reduce the light-emitting efficiency of Micro LED chips, causing problems such as brightness attenuation and color shift. Research shows that the brightness of the chip may decrease significantly under high temperature for a short time, and long-term high temperature will also accelerate the aging of the chip and shorten its service life. In addition, overheating may cause system failure, affect battery performance, and reduce charging and discharging efficiency and cycle life. Due to the small size design of the smart glasses battery, the heat dissipation space is limited, and it is more susceptible to high temperature.

[0003] Therefore, there is an urgent need to provide a light-mechanism assembly for a wearable device and a smart head-mounted device to improve heat dissipation efficiency. CONTENT OF THE INVENTION

[0004] To solve at least one or more of the above-mentioned technical problems, the present disclosure provides, in some aspects, a light-mechanism assembly for a wearable device and a smart head-mounted device.

[0005] In a first aspect, the present disclosure provides a light-mechanism assembly for a wearable device, comprising: a light mechanism; a fixing member fixedly connected with a housing of the wearable device, and the fixing member comprises a fixing ring, the fixing ring being sleeved on an outer periphery of the light mechanism; a heat dissipation mechanism abutting against the light mechanism and fixedly connected with the fixing member.

[0006] In some embodiments, the light mechanism comprises a lens, and the fixing ring is coaxially arranged with the lens of the light mechanism.

[0007] In some embodiments, the light engine further comprises a substrate portion, and the heat dissipation mechanism comprises a heat dissipation bracket and a heat conducting member, the heat dissipation bracket and the heat conducting member together defining a receiving cavity for receiving the substrate portion.

[0008] In some embodiments, the heat dissipation bracket comprises a receiving groove, and the heat conducting member comprises a heat conducting foil attached to the substrate portion and a heat conducting connecting portion connected to the heat dissipation bracket.

[0009] In some embodiments, the heat conducting foil is connected to the substrate portion by means of an electrically conductive adhesive.

[0010] In some embodiments, the fixing member is transparent or translucent, and the fixing member is fixedly connected to the heat dissipation mechanism by means of UV glue.

[0011] In a second aspect, the present disclosure provides a smart head-mounted device comprising a housing, and a light engine assembly for a wearable device according to the first aspect and the embodiments.

[0012] In some embodiments, the housing further comprises a middle frame having a through hole, the fixing member has a lens hole corresponding to a lens position of the light engine, the middle frame is fixedly connected to the fixing member, and the through hole is in communication with the lens hole.

[0013] In some embodiments, the display waveguide sheet is fixedly connected to the housing, and the through hole is adjacent to the display waveguide sheet.

[0014] In some embodiments, the display waveguide sheet is at least partially made of silicon carbide material.

[0015] With the light engine assembly for a wearable device and the smart head-mounted device as provided above, the fixing member with the fixing ring located at the outer periphery of the light engine and the heat dissipation mechanism connected to the fixing member and the light engine can improve the heat dissipation effect of the light engine with a simple structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 FIG. 1 shows an example perspective view of a light engine assembly for a wearable device according to some embodiments of the present disclosure;

[0018] Figure 2a FIG. 2 shows an example exploded view of a light engine assembly for a wearable device according to some embodiments of the present disclosure;

[0019] Figure 2bAn exemplary exploded view of an optical-mechanical assembly for a wearable device is shown illustrating some embodiments of the present disclosure;

[0020] Figure 3 An exemplary cross-sectional view of an optical-mechanical assembly for a wearable device is shown illustrating some embodiments of the present disclosure;

[0021] Figure 4 An exemplary perspective view of a smart head-mounted device is shown illustrating some embodiments of the present disclosure;

[0022] Figure 5 An exemplary exploded view of a smart head-mounted device is shown illustrating some embodiments of the present disclosure;

[0023] Figure 6 An exemplary cross-sectional view of a smart head-mounted device is shown illustrating some embodiments of the present disclosure.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 10 - optical engine; 100 - optical engine assembly; 11 - lens; 12 - substrate portion; 20 - fixing member; 200 - smart head-mounted device; 21 - fixing ring; 211 - lens hole; 30 - heat dissipation mechanism; 31 - heat dissipation support; 310 - accommodating cavity; 311 - accommodating groove; 312 - connecting opening; 313 - heat dissipation cylinder; 32 - heat conduction member; 321 - heat conduction foil; 322 - heat conduction connecting portion; 40 - housing; 41 - middle frame; 411 - through hole; 42 - front cover; 50 - display waveguide sheet; 60 - housing rear cover. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of, rather than all of the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present disclosure.

[0027] It should be understood that the terms "include" and "contain" used in the specification and claims of the present disclosure indicate the existence of the described features, whole, steps, operations, elements and / or components, but do not exclude the existence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0028] It should also be understood that the terms used herein are for the purpose of describing particular embodiments and are not intended to limit the present disclosure. As used in this specification and claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or," as used herein, refers to and encompasses any and all possible combinations of one or more of the associated listed items, as well as the lack of combinations when interpreted in the alternative.

[0029] As used in this specification and claims, the term "if' can be construed to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be construed to mean "upon determining" or "in response to determining" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]," depending on the context.

[0030] The present embodiments provide a light engine assembly for a wearable device, which is capable of improving the heat dissipation effect of the light engine with a simple structure by providing a fixing member with a fixing ring located at the outer periphery of the light engine, and a heat dissipation mechanism connected with the fixing member and the light engine.

[0031] The specific embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings.

[0032] Referring to Figure 1 and Figure 2a , Figure 1 shows an example perspective view of a light engine assembly for a wearable device according to some embodiments of the present disclosure, Figure 2a shows an example exploded view of a light engine assembly for a wearable device according to some embodiments of the present disclosure.

[0033] In this embodiment, the light engine assembly 100 for the wearable device comprises a light engine 10, a fixing member 20, and a heat dissipation mechanism 30. The fixing member 20 is fixedly connected with the shell of the wearable device, and comprises a fixing ring 21 sleeved on the outer periphery of the light engine 10. The heat dissipation mechanism 30 is in abutment with the light engine 10 and is fixedly connected with the fixing member 20. Specifically, the light engine 10 is an image projection device comprising a light source, a lens and other components, which is used to generate and project a pattern through a lens 11. The fixing member 20 is a structural member for connecting the light engine 10 with the shell 40 of the wearable device, which can be made of resin or other materials having certain structural strength and being easy to conduct heat. The heat dissipation mechanism 30 is a heat transfer component directly connected with the light engine 10, which is made of metal material easy to transfer heat. In this embodiment, the heat dissipation mechanism 30 is black to further improve its ability to absorb heat radiation and improve the heat absorption and dissipation effect.

[0034] During the process of generating images or processing information, the chip inside the light engine 10 will generate heat due to the resistance heating effect caused by the current passing through when driving a large number of tiny LED pixels to emit light. Therefore, the heat dissipation mechanism 30 in direct abutment with the light engine 10 can timely absorb the above-mentioned heat and conduct it to the fixing member 20 through the connection with the fixing member 20, and then to the shell of the wearable device through the fixing member 20, avoiding the accumulation of heat in the local part of the wearable device and affecting the performance of the device, or even causing device failure. The fixing ring 21 sleeved on the outer periphery of the light engine 10 can also receive the heat emitted outward by the light engine 10 through heat radiation and the like, and directly transfer it to the shell 40, further improving the heat dissipation effect.

[0035] In this embodiment, the optical engine 10 comprises a lens 11, and the fixing ring 21 is coaxially arranged with the lens 11 of the optical engine 10. The lens 11 is cylindrical, and the inner side of the fixing ring 21 is provided with a through hole extending along the axis of the lens 11. One end of the lens 11 passes through the through hole and is connected to the part of the fixing member 20 connected to the shell 40, and the other end is used to abut against the heat dissipation mechanism 30. By coaxially arranging the lens 11 and the fixing ring 21, the heat transfer between the part of the lens 11 and the fixing ring 21 can be kept uniform, reducing the possibility of local heat concentration caused by uneven distance between the heat dissipation component and the heat generating component during heat dissipation. At the same time, by coaxially arranging the fixing ring 21 and the lens 11, the structure of the fixing member 20 and the optical engine 10 can be more compact by reducing the difference between the inner diameter of the fixing ring 21 and the outer diameter of the lens 11 of the optical engine 10, and the distance between the two is reduced, improving the heat transfer efficiency. In addition, a wide-mouth structure 213 is also provided on the side of the fixing member 20 away from the heat dissipation mechanism 30, which has a larger inner diameter relative to the through hole of the fixing ring 21, so that the distance between the wide-mouth structure 213 and the circumferential outer wall of the lens 11 is farther. The wide-mouth structure 213 can make it more difficult for the adhesive such as UV glue to contact the lens 11 when connecting the shell and the fixing member 20 by means of the adhesive, reducing the risk of lens 11 being contaminated by the adhesive causing image blur.

[0036] Referring to Figure 2a to Figure 3 , Figure 2b An exemplary exploded view of an optical engine assembly for a wearable device is shown, Figure 3 An exemplary cross-sectional view of an optical engine assembly for a wearable device is shown. In this embodiment, the optical engine 10 further comprises a substrate 12, and the heat dissipation mechanism 30 comprises a heat dissipation bracket 31 and a heat conduction member 32, and the heat dissipation bracket 31 and the heat conduction member 32 jointly enclose a receiving cavity 310 for accommodating the substrate 12. The substrate 12 is a component for processing information and generating images, including sensors and PCBs, and is the source of heat of the optical engine, and is generally formed in a plate shape and located on the side of the optical engine 10 away from the lens 11 along the axis of the lens 11. The heat dissipation bracket 31 and the heat conduction member 32 are formed in a structure capable of being buckled to each other, for example, one is formed in a concave shape, and the other comprises a plate-shaped structure capable of closing the concave shape, so that the receiving cavity 310 enclosed by the heat dissipation bracket 31 and the heat conduction member 32 can surround the substrate 12. The heat emitted by the substrate 12 can be directly transferred to the heat dissipation mechanism 30 by direct contact between the substrate 12 and the heat dissipation mechanism 30, and can be indirectly transferred to the heat dissipation mechanism 30 in the space in the receiving cavity 310 by indirect means such as heat radiation. Thus, the heat dissipation mechanism 30 increases the heat dissipation area corresponding to the substrate 12 by surrounding the substrate 12, improving the overall heat dissipation effect.

[0037] In this embodiment, the heat dissipation support 31 comprises a receiving groove 311, the heat conducting member 32 comprises a heat conducting foil 321 which is attached to the substrate 12, the receiving groove 311 is arranged spaced apart from the optical engine 10, and the heat conducting foil 321 is connected to the heat dissipation support 31 by means of the heat conducting connecting part 322 to transfer heat. The heat conducting foil 321 can be made of copper foil made of red copper, or other metal foil made of metal material with high thermal conductivity which is easy to conduct heat, which can preferentially conduct most of the heat generated by the substrate 12 by being directly attached to the substrate 12. Among them, the heat dissipation support 31 is roughly formed as a hollow rectangular parallelepiped, and an open receiving groove 311 is arranged on the side facing the heat conducting member 32. The shape of the receiving groove 311 is adapted to the shape of the optical engine 10 to accommodate at least part of the optical engine 10, and a small gap can be formed between the optical engine 10 and the receiving groove 311. The heat conducting connecting part 322 is formed in a sheet shape and arranged at the edge of the heat conducting foil 321, which is bent by 90° relative to the heat conducting foil 321 to abut against the peripheral wall of the heat dissipation support 31, and then is fixedly connected to the heat dissipation support 31 by means of adhesion or the like.

[0038] Therefore, the outer wall of the optical engine 10 and the heat dissipation support 31 are spaced apart from each other without direct contact, which can reduce the risk of local heat concentration and make part of the heat evenly transferred through the frame of the heat dissipation support 31 by means of heat radiation or the like. Since a large number of small LED light emitting elements and electronic control modules are usually arranged on the substrate 12, which are the main source of heat generated by the optical engine 10 when working. Therefore, by means of the attachment of the heat conducting foil 321 to the substrate 12, most of the heat generated by the substrate 12 can be preferentially transferred to the housing through the heat conducting foil 321, the heat conducting connecting part 322, the heat dissipation support 31 and the fixing member 20, thereby reducing the speed of heat accumulation around the substrate 12 and reducing the negative impact of high heat on the working efficiency and light emitting effect of the substrate 12.

[0039] In this embodiment, the heat dissipation support 31 is arranged as a hollow rectangular parallelepiped, the heat conducting member 32 is formed as a heat conducting foil 321 with a rectangular shape, and the heat conducting connecting part 322 is arranged by bending three edges of the heat conducting foil 321. A connecting opening 312 is further arranged on one side wall of the heat dissipation support 31, and the connecting structure of the optical engine 10 can pass through the connecting opening 312 to be connected to the corresponding power supply assembly or control assembly. In addition, the heat dissipation support 31 is further provided with a heat dissipation cylinder 313 for accommodating the lens 11 of the optical engine 10, the heat dissipation cylinder 313 is coaxially arranged with the lens 11 and is arranged spaced apart from the outer wall of the lens 11. The heat dissipation cylinder 313 is used for indirect heat exchange between the lens 11 to further improve the overall heat dissipation efficiency. The end of the heat dissipation cylinder 313 facing the fixing member 20 abuts against the fixing ring 21 and is fixedly connected to the fixing member 20 by means of adhesion or the like.

[0040] It is understood by those skilled in the art that the specific structure of the fixing member 20 and the heat dissipation mechanism 30 is not limited by the present disclosure, as long as it can meet the abutment and heat dissipation requirements of the light engine 10. For example, in some embodiments not shown, the heat dissipation bracket can be formed in a cylindrical or polygonal shape, and the heat conducting member is formed to match the shape of the receiving groove of the heat dissipation bracket. In other embodiments, the heat dissipation bracket is provided with a plate-shaped main body, and the heat conducting member is provided with a receiving groove, and the plate-shaped main body of the heat dissipation bracket is buckled and closed to the receiving groove.

[0041] In addition, in this embodiment, the heat conducting foil 321 is connected to the substrate 12 by means of a conductive adhesive. In this way, the heat conducting foil 321 can form an electrical connection while forming a heat conducting connection with the substrate 12, so that the substrate 12 can be grounded by the connection of the heat conducting connection 322, the heat dissipation bracket 31 and the fixing member 20, reducing the possibility of the camera being damaged by high voltage during subsequent ESD testing and other processes.

[0042] Further or alternatively, in some embodiments, the fixing member 20 is transparent or translucent, and the fixing member 20 and the heat dissipation mechanism 30 are fixedly connected by UV glue. For example, the fixing member 20 can be made of transparent acrylic material. In this way, the fixing member 20 and the heat dissipation mechanism 30 can be normally assembled when the UV glue is not cured, and cured by releasing UV light towards the fixing member 20. This makes the assembly process more convenient, and is more suitable for adhesion in small gaps or complex structures, and is more conducive to automated production.

[0043] The light engine assembly for wearable devices according to some embodiments of the present disclosure can make the heat dissipation structure of the light engine more compact, and the heat dissipation efficiency is stable and reliable, reducing the accumulation of local heat due to uneven heat dissipation, by providing a fixing member with a fixing ring, and a heat dissipation mechanism abutting against the light engine.

[0044] Referring to Figure 4 to Figure 5 , Figure 4 An exemplary perspective view of a smart head-mounted device according to some embodiments of the present disclosure is shown, Figure 5 An exemplary exploded view of a smart head-mounted device according to some embodiments of the present disclosure is shown. The smart head-mounted device 200 includes a housing 40, and a light engine assembly 100 according to various embodiments of the present disclosure. The smart head-mounted device 200 is a smart device such as AR glasses for being worn by a user and displaying images to the user, the housing 40 is a structural member such as a glasses frame for providing support, and the light engine assembly is an optical assembly fixedly arranged on the housing 40 to generate and project images.

[0045] Referring to Figure 4 to Figure 6 , Figure 6An exemplary cross-sectional view of the smart head-mounted device of some embodiments of the present disclosure is shown. In this embodiment, the housing 40 of the smart head-mounted device further comprises a middle frame 41 having a through hole 411, the fixing member 20 has a lens hole 211 corresponding to the position of the lens 11 of the light engine 10, the middle frame 41 is fixedly connected with the fixing member 20, and the through hole 411 is in communication with the lens hole 211. The housing 40 comprises a front cover 42 and the middle frame 41 which are buckled with each other. The front cover 42 is made of PC or other light materials, while the middle frame 41 can be made of magnesium-lithium alloy or other hard materials with good heat conduction performance. The fixing member 20 is fixedly arranged relative to the middle frame 41, and the side of the middle frame 41 facing the front cover 42 is provided with the through hole 411 which is mainly used for exposing the lens 11 of the light engine 10 to transmit images, and the fixing member 20 is provided with the lens hole 211. In this embodiment, the inner hole of the fixing member 20 penetrates the fixing member 20 to form the lens hole 211, and the lens hole 211 is in communication with the through hole 411 to enable the lens 11 of the light engine 10 to transmit images. In addition, the space in the through hole 411 and the lens hole 211 can also be used for heat transfer and dissipation of the light engine 10 to further uniformly transmit heat to the housing 40. In addition, the housing 40 is further provided with a housing back cover 60, which can close the housing 40 after the light engine assembly 100 is installed inside the housing 40, thereby protecting the electronic components and optical components inside the smart head-mounted device. The material of the housing back cover 60 can be nylon or other light and soft materials to effectively reduce the overall weight and improve flexibility.

[0046] In this embodiment, the display waveguide sheet 50 is further included, which is fixedly connected with the housing 40 and adjacent to the through hole 411. Specifically, the housing 40 is generally formed into a glasses frame shape composed of the front cover 42 and the middle frame 41, the display waveguide sheet 50 is formed into a glasses sheet shape and is clamped in the middle by the front cover 42 and the middle frame 41. Two display waveguide sheets 50 and two light engine assemblies 100 are arranged on the housing 40, so that the display waveguide sheets 50 can receive images generated by the light engine assemblies 100 and transmit to the user's eyes. The side of the display waveguide sheet 50 close to the middle frame 41 is adjacent to the through hole 411 on the middle frame 41.

[0047] Thus, on the one hand, the display waveguide sheet 50 can receive heat transferred by the middle frame 41 by virtue of its direct contact with the middle frame 41, and dissipate the heat by virtue of its sheet structure, quickly and efficiently dissipating heat through the large area of the sheet body. On the other hand, while receiving the picture projected by the light engine assembly through the through hole 411, the heat emitted by the light engine 10 can also be indirectly transmitted to the display waveguide sheet 50 through the through hole 411, further improving the heat dissipation efficiency. In some embodiments, the display waveguide sheet 50 is at least partially made of silicon carbide material, which has the characteristic of high thermal conductivity, and its thermal conductivity is much higher than that of traditional glass or resin lens materials. By using the above one or more embodiments, the use of silicon carbide material for lens heat dissipation can further greatly improve the heat dissipation efficiency.

[0048] While various embodiments of the present disclosure have been shown and described herein, it will be understood by those skilled in the art that such embodiments are presented by way of example only. Numerous changes, substitutions and alterations to the embodiments described and illustrated herein can be made without departing from the spirit and scope of the present disclosure. It will be understood that various alternatives to the embodiments of the present disclosure described herein can be employed in practicing the present disclosure. The claims are intended to cover all such alternatives and equivalents.

Claims

1. An optomechanical component for wearable devices, characterized in that, include: Optical mechanism (10); A fastener (20) is fixedly connected to the housing of the wearable device, and the fastener includes a fixing ring (21) which is sleeved on the outer periphery of the optical engine (10); The heat dissipation mechanism (30) abuts against the optical engine (10) and is fixedly connected to the fixing member (20).

2. The optomechanical assembly according to claim 1, characterized in that, The optical engine (10) includes a lens (11), and the fixing ring (21) is coaxially arranged with the lens (11) of the optical engine (10).

3. The optomechanical assembly according to claim 2, characterized in that, The optical engine (10) also includes a substrate (12), and the heat dissipation mechanism (30) includes a heat dissipation bracket (31) and a heat conduction component (32). The heat dissipation bracket (31) and the heat conduction component (32) together enclose a receiving cavity (310) for accommodating the substrate (12).

4. The optomechanical assembly according to claim 3, characterized in that, The heat dissipation bracket (31) includes a receiving groove (311) which is spaced apart from the optomechanical unit (10). The heat-conducting component (32) includes a heat-conducting foil (321) that is attached to the substrate portion (12) and a heat-conducting connection portion (322) that is connected to the heat dissipation bracket (31).

5. The optomechanical assembly according to claim 4, characterized in that, The thermally conductive foil (321) is connected to the substrate portion (12) by means of a conductive adhesive.

6. The optomechanical assembly according to any one of claims 1 to 5, characterized in that, The fastener (20) is transparent or semi-transparent, and the fastener (20) is fixedly connected to the heat dissipation mechanism (30) by means of UV adhesive.

7. A smart head-mounted device, characterized in that, It includes a housing (40) and an optomechanical assembly for a wearable device according to any one of claims 1 to 6.

8. The intelligent head-mounted device according to claim 7, characterized in that, The housing (40) further includes a middle frame (41) having a through hole (411), and the fixing member (20) having a lens hole (211) corresponding to the position of the lens (11) of the optical engine (10). The middle frame (41) is fixedly connected to the fixing member (20), and the through hole (411) communicates with the lens hole (211).

9. The intelligent head-mounted device according to claim 8, characterized in that, It also includes a display waveguide (50), which is fixedly connected to the housing (40), and the through hole (411) is adjacent to the display waveguide (50).

10. The intelligent head-mounted device according to claim 9, characterized in that, The display waveguide (50) is at least partially made of silicon carbide material.

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