WO2019196525A1 - 激光投射结构和电子装置 - Google Patents

激光投射结构和电子装置 Download PDF

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Publication number
WO2019196525A1
WO2019196525A1 PCT/CN2019/070766 CN2019070766W WO2019196525A1 WO 2019196525 A1 WO2019196525 A1 WO 2019196525A1 CN 2019070766 W CN2019070766 W CN 2019070766W WO 2019196525 A1 WO2019196525 A1 WO 2019196525A1
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WO
WIPO (PCT)
Prior art keywords
laser
laser projector
light
side wall
projection structure
Prior art date
Application number
PCT/CN2019/070766
Other languages
English (en)
French (fr)
Inventor
杨浪
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2019196525A1 publication Critical patent/WO2019196525A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
    • 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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/145—Housing details, e.g. position adjustments thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02—Constructional details
    • H01S3/025—Constructional details of solid state lasers, e.g. housings or mountings

Definitions

  • the present application relates to the field of three-dimensional imaging technology, and more particularly to a laser projection structure and an electronic device.
  • a structured light projector may be disposed on the mobile terminal, and the structured light projector is configured to emit a laser pattern into the target space for acquiring depth information of the target object.
  • Embodiments of the present application provide a laser projection structure and an electronic device.
  • the laser projection structure of the embodiment of the present application includes a laser projector and a sealing member, the laser projector is formed with a light emitting surface; the sealing member includes a body and a resisting portion, and the body is disposed on the light emitting surface and In combination with the laser projector, the abutting portion extends from the body in a light exiting direction of the laser projector.
  • An electronic device includes a housing, a cover plate, and a laser projection structure, the cover plate being mounted on the housing, the laser projection structure including a laser projector and a seal, the laser projector being formed with a light-emitting surface;
  • the sealing member includes a body and a resisting portion, the body is disposed on the light-emitting surface and combined with the laser projector, and the resisting portion emits light from the laser projector along the body Directional extension;
  • the laser projection structure is mounted in the housing, the light emitting surface faces the cover plate, the abutting portion abuts the cover plate and is used for sealing the light emitting surface and the cover plate The gap between them.
  • FIG. 1 is a perspective exploded view of an electronic device according to an embodiment of the present application.
  • FIG. 2 is a partial cross-sectional view of an electronic device according to an embodiment of the present application.
  • Figure 3 is an enlarged schematic view showing a portion III of the electronic device of Figure 2;
  • FIG. 4 is a perspective view of a sealing member of a laser projection structure according to an embodiment of the present application.
  • FIG. 5 is a perspective view showing another angle of a sealing member of a laser projection structure according to an embodiment of the present application.
  • FIG. 6 is a partial cross-sectional view showing an electronic device according to another embodiment of the present application.
  • FIG. 7 is a schematic cross-sectional view of a sealing member of a laser projection structure according to an embodiment of the present application.
  • FIGS. 8 to 10 are partial structural views of a laser projector of a laser projection structure according to an embodiment of the present application.
  • the first feature "on” or “below” the second feature may be the direct contact of the first and second features, or the first and second features are indirectly through the intermediate medium, unless otherwise explicitly stated and defined. contact.
  • the first feature "above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.
  • the laser projection structure 30 of the embodiment of the present application includes a laser projector 31 and a sealing member 32, the laser projector 31 is formed with a light-emitting surface 3161; the sealing member 32 includes a body 321 and a resisting portion 322, and the body 321 is disposed On the light-emitting surface 3161 and in combination with the laser projector 31, the abutting portion 322 extends from the body 321 in the light-emitting direction of the laser projector 31.
  • the laser projector 31 includes a light exit opening 317 formed on the light exit surface 3161 , and the resisting portion 322 is annular and disposed around the light exit opening 317 .
  • the cross-sectional width of the abutting portion 322 gradually decreases along the light-emitting direction of the laser projector 31.
  • the abutting portion 322 includes an inner side wall 3221 and an outer side wall 3222, the inner side wall 3221 is inclined outward in the light emitting direction of the laser projector 31; and/or the outer side wall 3222 is tilted inward.
  • the body 321 is formed with a receiving cavity 3213.
  • the body 321 is sleeved on the laser projector 31 to extend the laser projector 31 into the receiving cavity 3213.
  • the laser projector 31 includes a lens barrel 312 that is sleeved on the lens barrel 312.
  • the laser projector 31 includes a lens barrel 312, a diffractive element 315, and a protective cover 316 housed within the lens barrel 312, the protective cover 316 being mounted on the mirror
  • the sleeve 312 is disposed to prevent the diffraction element 315 from coming out of the lens barrel 312, and the body 321 is sleeved on the protective cover 316.
  • the body 321 includes a top portion 3211 that conforms to the protective cover 316 and a side portion 3212 that extends from the top portion 3211, the side portion 3212 and The top portion 3211 collectively encloses the receiving cavity 3213.
  • the abutting portion 322 includes an inner sidewall 3221 and an outer sidewall 3222;
  • the inner side wall 3221 is outwardly inclined along the light exiting direction of the laser projector 31, and the outer side wall 3222 is perpendicular to the top portion 3211; or
  • the outer side wall 3222 is inclined inward along the light exiting direction of the laser projector 31, and the inner side wall 3221 is perpendicular to the top portion 3211.
  • the material of the seal 32 is silicone or rubber.
  • the electronic device 100 of the embodiment of the present application includes a housing 10, a cover plate 20, and the laser projection structure 30 according to any of the above embodiments.
  • the cover plate 20 is mounted on the housing 10; the laser projection structure 30
  • the light-emitting surface 3161 faces the cover plate 20, and the abutting portion 322 abuts the cover plate 20 and seals the light-emitting surface 3161 and the cover plate 20 The gap between them.
  • the housing 10 includes a front housing 11 and a rear housing 12, and the cover 20 is mounted on the front housing 11.
  • the laser projection structure 30 is mounted on the front case 11, and the rear case 12 abuts a side of the laser projector 31 opposite to the light exit surface 3161; or
  • the electronic device 100 further includes a bracket 50 mounted between the front case 11 and the rear case 12, and the laser projection structure 30 is mounted on the bracket 50.
  • an electronic device 100 of an embodiment of the present application includes a housing 10 , a cover plate 20 , and a laser projection structure 30 .
  • the electronic device 100 can be a mobile phone, a tablet computer, a laptop computer, a game machine, a head display device, an access control system, a teller machine, etc.
  • the embodiment of the present application is described by taking the electronic device 100 as a mobile phone as an example. It can be understood that the specific form of the electronic device 100 It can be other and is not limited here.
  • the housing 10 can serve as an outer casing of the electronic device 100.
  • the housing 10 can serve as a mounting carrier for the cover 20 and the laser projection structure 30.
  • the housing 10 can provide dust, water, and fall resistance to the laser projection structure 30.
  • the protection of the housing 10 can also be installed with components such as a display screen and a battery.
  • the casing 10 includes a front casing 11 and a rear casing 12, and the front casing 11 and the rear casing 12 are coupled to each other and the laser projection structure 30 is received between the front casing 11 and the rear casing 12, and the front casing 11 is
  • the rear case 12 can be made of a material such as stainless steel, aluminum alloy, or plastic.
  • the front shell 11 can also be provided with a through hole 111.
  • the functional module of the electronic device 100 can penetrate into the through hole 111 and emit light to the outside. Signals such as signals and sound signals or receiving external light signals.
  • the cover plate 20 is mounted on the casing 10. Specifically, in the embodiment of the present application, the cover plate 20 is mounted on the front casing 11, and the cover plate 20 and the laser projection structure 30 are respectively mounted on opposite sides of the front casing 11 from each other. On the front shell 11. The cover 20 can be covered on the front cover 11 to cover the display screen of the electronic device 100.
  • the cover 20 can be light-transmissive.
  • the cover 20 can be made of light-transmissive glass, resin, plastic or the like.
  • the laser projection structure 30 is mounted in the housing 10.
  • the laser projection structure 30 is mounted on the front housing 11, specifically, the laser projection structure 30 penetrates the front housing 11.
  • the perforations 111 are mounted on the front case 11, and a glue may be filled between the laser projection structure 30 and the inner wall of the perforations 111 to assist in securing the laser projection structure 30.
  • Both sides of the laser projection structure 30 are respectively held by the cover 20 and the rear case 12 to further fix the position of the laser projection structure 30.
  • the laser projection structure 30 includes a laser projector 31 and a seal 32.
  • the laser projector 31 includes a substrate assembly 311, a lens barrel 312, a light source 313, a collimating element 314, a diffractive element 315, and a protective cover 316.
  • the substrate assembly 311 includes a substrate 3112 and a circuit board 3111.
  • the circuit board 3111 is disposed on the substrate 3112.
  • the circuit board 3111 is electrically connected to the main board 40 of the electronic device 100.
  • the circuit board 3111 can be a printed circuit board, a flexible circuit board or a soft board. Hard bonding board.
  • the lens barrel 312 is disposed on the substrate assembly 311, and the lens barrel 312 is formed with a hollow cavity.
  • the light source 313 is disposed on the substrate assembly 311.
  • the light source 313 can be disposed in the receiving hole 3113 of the circuit board 3111 and electrically connected to the circuit board 3111 through a wire (not shown).
  • the light source 313 can be a vertical cavity surface emitting laser (Vertical Cavity). Surface Emitting Laser (VCSEL) or edge-emitting laser (EEL), the light source 313 emits laser light under the driving of electric energy, and the laser light may be infrared light.
  • the collimating element 314 is disposed within the lens barrel 312, the collimating element 314 can be a lens, and the collimating element 314 is used to collimate the laser light emitted by the light source 313.
  • the diffraction element 315 is disposed in the lens barrel 312, and the laser light collimated by the collimating element 314 passes through the diffraction element 315, and the diffraction element 315 diffracts the laser light out of the predetermined laser pattern and emits it from the laser projector 31.
  • the protective cover 316 is mounted on the lens barrel 312. Specifically, the protective cover 316 is disposed on the lens barrel 312. The protective cover 316 and the lens barrel 312 may be detachably fixedly coupled, and the protective cover 316 is used to restrict the diffraction element 315. Inside the lens barrel 312, the diffraction element 315 is prevented from coming out of the lens barrel 312.
  • the laser projector 31 is formed with a light-emitting surface 3161, and the light-emitting surface 3161 faces the cover plate 20.
  • the side of the laser projector 31 opposite to the light-emitting surface 3161 is abutted by the rear casing 12, and the laser light passes through the light-emitting surface 3161 from the laser projector. Throughout the 31, the laser passes through the cover 20 and then passes through the electronic device 100.
  • a light exiting opening 317 is formed on the light-emitting surface 3161, and the laser light is passed through the light-emitting opening 317 to pass through the laser projector 31.
  • the light-emitting opening 317 is opened on the protective cover 316.
  • the sealing member 32 is mounted on the laser projector 31, and the sealing member 32 is used for sealing the gap between the light surface 3161 and the cover plate 20 to prevent impurities such as dust or moisture from entering the light exit port 317.
  • the sealing member 32 includes a body 321 and a resisting portion 322, and the sealing member 32 may be made of a material that is more elastic, for example, the sealing member 32 may be made of silicone rubber or rubber or the like.
  • the body 321 is fixedly coupled to the laser projector 31.
  • the body 321 is disposed on the light exit surface 3161 and is fixedly coupled to the laser projector 31.
  • the body 321 is fixed on the protective cover 316, and the body 321 includes a top portion 3211 and a side portion 3212.
  • the top portion 3211 is attached to the protective cover 316, the top portion 3211 is provided with a light passing port 3214, the light passing port 3214 is aligned with the light exit port 317, the side portion 3212 extends from the top portion 3211, and the side portion 3212 and the top portion 3211 together define a receiving cavity 3213.
  • the body 321 is sleeved on the laser projector 31 to extend the laser projector 31 into the receiving cavity 3213.
  • the protective cover 316 extends into the receiving cavity 3213 to sleeve the body 321 on the protective cover 316.
  • the shape may be similar to the shape and size of the protective cover 316, and the body 321 may enclose the protective cover 316 to enable the body 321 and the protective cover 316 to be better combined.
  • the abutting portion 322 extends from the body 321 in the light emitting direction of the laser projector 31 (in the X direction of FIG. 2). Specifically, the abutting portion 322 extends from the top portion 3211 of the body 321.
  • the abutting portion 322 is configured to resist the gap between the light-emitting surface 3161 and the cover plate 20, and the top end of the resisting portion 322 is elastically deformed and more closely adhered to the cover plate 20, and the dust is adhered. Water vapor or the like is less likely to enter the laser projection structure 30 from the gap between the resisting portion 322 and the cover plate 20.
  • the resisting portion 322 is annular and disposed around the light exit opening 317.
  • the resisting portion 322 may be in the shape of an annular shape, a rectangular ring shape, an elliptical ring shape, or the like, and the resisting portion 322
  • the surrounding light exit opening 317 is provided to prevent impurities from entering the light exit opening 317 from a plurality of directions, thereby providing better protection to the laser projector 31.
  • the abutting portion 322 includes an inner side wall 3221 and an outer side wall 3222.
  • the inner side wall 3221 is closer to the light passing port 3214 than the outer side wall 3222.
  • the inner side wall 3221 and the outer side wall 3222 intersect the top end of the abutting portion 322 when the top end is squeezed. At the same time, the inner side wall 3221 and the outer side wall 3222 can be deformed simultaneously.
  • the cross-sectional width of the resisting portion 322 gradually decreases along the light-emitting direction of the laser projector 31, that is, in the light-emitting direction of the laser projector 31, the inner side wall 3221 and the outer side wall 3222
  • the interval between the resisting portions 322 and the cover plate 20 is relatively concentrated, and the resisting portion 322 and the cover plate 20 are closely attached, and the sealing effect of the resisting portion 322 is better.
  • the inner side wall 3221 is inclined outward while the outer side wall 3222 is inclined inward.
  • the light-emitting direction is the same as the direction in which the light-emitting surface 3161 is directed to the cover plate 20.
  • the sealing member 32 may be first installed in the laser projector 31 to constitute the laser projection structure 30, and then the laser projection structure 30 is mounted in the through hole 111 of the front case 11, and then the rear case 12 is front and front.
  • the case 11 is combined such that the rear case 12 abuts against the side of the laser projector 31, and finally the cover 20 is joined to the front case 11, so that the cover 20 abuts against the abutting portion 322 of the seal 32.
  • the resisting portion 322 of the sealing member 32 extends from the body 321 in the light emitting direction of the laser projector 31, and the resisting portion 322 is abutted against the cover plate 20, and the resisting portion 322 can seal the laser projection.
  • a gap between the light-emitting surface 3161 of the device 31 and the cap plate 20 prevents impurities such as dust from entering the inside of the laser projector 31.
  • the electronic device 100 further includes a bracket 50 mounted between the front case 11 and the rear case 12 , and the laser projection structure 30 is mounted on the bracket 50 .
  • the laser projector 31 is mounted on the bracket 50 and protrudes from the bracket 50, and the portion of the laser projector 31 that protrudes from the bracket 50 and the seal 32 penetrate together into the through hole 111 of the front case 11.
  • the abutting portion 322 of the sealing member 32 abuts against the cap plate 20.
  • the laser projector 31 may not include the protective cover 316 , the light emitting surface 3161 is the top surface of the lens barrel 312 , and the body 321 of the sealing member 32 is directly sleeved on the lens barrel 312 .
  • the top portion 3211 of the body 321 is coupled to the light exit surface 3161, and the side portion 3212 of the body 321 is sleeved on the lens barrel 312, while the top portion 3211 of the body 321 prevents the diffraction element 315 from coming out of the lens barrel 312.
  • the specific structure of the body 321 is not limited to the above discussion.
  • the body 321 may not include the side portion 3212 described above and does not form the receiving cavity 3213.
  • the top portion 3211 of the 321 is directly bonded to the protective cover 316, for example, by gluing the top portion 3211 to the protective cover 316, and the abutting portion 322 extends from the body 321 .
  • the extending direction of the inner side wall 3221 and the outer side wall 3222 of the abutting portion 322 may be otherwise.
  • the inner side wall 3221 may be outwardly inclined, and the outer side wall 3222 is perpendicular to the top portion 3211.
  • the resisting portion 322 is pressed by the cover plate 20, the resisting portion 322 is inclined outward without tilting inward.
  • the resisting portion 322 is prevented from being blocked to the light passing port 3214.
  • the outer side wall 3222 in the light-emitting direction of the laser projector 31, the outer side wall 3222 may also be inclined inward, and the inner side wall 3221 is perpendicular to the top portion 3211.
  • the light source 313 is an edge emitting laser 313.
  • the edge emitting laser 313 may be a distributed feedback laser (DFB).
  • the side emitting laser 313 has a columnar shape as a whole, and an end surface of the side emitting laser 313 away from the substrate assembly 311 is formed with a light emitting surface 3131, and the laser light is emitted from the light emitting surface 3131, and the light emitting surface 3131 faces the collimating element 314.
  • the edge-emitting laser 313 is used as the light source.
  • the temperature of the edge-emitting laser 313 is smaller than that of the VCSEL array. In the other direction, since the edge-emitting laser 313 is a single-point light-emitting structure, it is not necessary to design an array structure, and the laser projector 31 is simple to manufacture.
  • the light source 313 is less expensive.
  • the laser projector 31 further includes a fixture 318 for securing the edge emitting laser 313 to the substrate assembly 311.
  • the gain of the power is obtained through the feedback of the grating structure.
  • the edge emitting laser 313 When the light emitting surface 3131 of the edge emitting laser 313 faces the collimating element 314, the edge emitting laser 313 is placed vertically. Since the edge emitting laser 313 has a slender strip structure, the edge emitting laser 313 is prone to accidents such as dropping, shifting, or shaking. Therefore, the edge emitting laser 313 can be fixed by providing the fixing member 318, preventing accidents such as dropping, shifting, or shaking of the edge emitting laser 313.
  • the fixing member 318 includes a sealant 3181, and the sealant 3181 is disposed between the edge emitting laser 313 and the substrate assembly 311. More specifically, in the example shown in FIG. 8, the side of the edge emitting laser 313 opposite to the light emitting surface 3131 is bonded to the substrate assembly 311 (specifically, the substrate 3112). In the example shown in FIG. 9, the side surface 3132 of the edge emitting laser 313 may also be bonded to the substrate assembly 311.
  • the sealing material 3181 may surround the surrounding side surface 3132, or may only bond one surface of the side surface 3132 with the substrate. Assembly 311 or bonding a number of faces to substrate assembly 311. Further, the encapsulant 3181 may be a thermal conductive adhesive to conduct heat generated by the operation of the light source 313 into the substrate assembly 311.
  • the fixture 318 includes a support frame 3182 that is disposed on the substrate assembly 311 and that is coupled to the support frame 3182 by a launch laser 313.
  • the number of the support frames 3182 may be plural, and the plurality of support frames 3182 may collectively surround the edge emitting laser 313, and the edge emitting laser 313 may be directly mounted between the plurality of support frames 3182 when installed.
  • the plurality of support frames 3182 collectively sandwich the edge emitting laser 313 to further prevent the edge emitting laser 313 from shaking.
  • the support frame 3182 may be a resilient support frame 3182. When the edge emitting laser 313 is clamped in the plurality of support frames 3182, the plurality of support frames 3182 are expanded and clamped to emit the laser 313.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, for example two, three, unless specifically defined otherwise.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Projection Apparatus (AREA)
  • Semiconductor Lasers (AREA)

Abstract

一种激光投射结构（30）。激光投射结构（30）包括激光投射器（31）和密封件（32）。激光投射器（31）形成有出光面（3161）。密封件（32）包括本体（321）和抵持部（322）。本体（321）设置在出光面（3161）上并与激光投射器（31）结合。抵持部（322）自本体（321）沿激光投射器（31）的出光方向延伸。

Description

激光投射结构和电子装置
优先权信息
本申请请求2018年04月10日向中国国家知识产权局提交的、专利申请号为201810317072.7的专利申请的优先权和权益，并且通过参照将其全文并入此处。
技术领域
本申请涉及三维成像技术领域，更具体而言，涉及一种激光投射结构和电子装置。
背景技术
移动终端上可以设置有结构光投射器，结构光投射器用于向目标空间中发射激光图案以用于获取目标物体的深度信息。
发明内容
本申请实施方式提供一种激光投射结构和电子装置。
本申请实施方式的激光投射结构包括激光投射器和密封件，所述激光投射器形成有出光面；所述密封件包括本体和抵持部，所述本体设置在所述出光面上并与所述激光投射器结合，所述抵持部自所述本体沿所述激光投射器的出光方向延伸。
本申请实施方式的电子装置包括壳体、盖板和激光投射结构，所述盖板安装在所述壳体上，所述激光投射结构包括激光投射器和密封件，所述激光投射器形成有出光面；所述密封件包括本体和抵持部，所述本体设置在所述出光面上并与所述激光投射器结合，所述抵持部自所述本体沿所述激光投射器的出光方向延伸；所述激光投射结构安装在所述壳体内，所述出光面朝向所述盖板，所述抵持部抵持所述盖板且用于密封所述出光面与所述盖板之间的间隙。
本申请的实施方式的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实施方式的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本申请实施方式的电子装置的立体分解示意图；
图2是本申请实施方式的电子装置的部分截面示意图；
图3是图2中的电子装置的III部分的放大示意图；
图4是本申请实施方式的激光投射结构的密封件的立体示意图；
图5是本申请实施方式的激光投射结构的密封件另一角度的立体示意图；
图6是本申请另一实施方式的电子装置的部分截面示意图；
图7是本申请实施方式的激光投射结构的密封件的截面示意图；
图8至图10是本申请实施方式的激光投射结构的激光投射器的部分结构示意图。
具体实施方式
以下结合附图对本申请的实施方式作进一步说明。附图中相同或类似的标号自始至终表示相同或类似的元件或具有相同或类似功能的元件。
另外，下面结合附图描述的本申请的实施方式是示例性的，仅用于解释本申请的实施方式，而不能理解为对本申请的限制。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
本申请实施方式的激光投射结构30包括激光投射器31和密封件32，所述激光投射器31形成有出光面3161；所述密封件32包括本体321和抵持部322，所述本体321设置在所述出光面3161上并与所述激光投射器31结合，所述抵持部322自所述本体321沿所述激光投射器31的出光方向延伸。
在某些实施方式中，所述激光投射器31包括形成在所述出光面3161上的出光口317，所述抵持部322呈环形且环绕所述出光口317设置。
在某些实施方式中，沿所述激光投射器31的出光方向上，所述抵持部322的截面宽度逐渐减小。
在某些实施方式中，所述抵持部322包括内侧壁3221和外侧壁3222，沿所述激光投射器31的出光方向上，所述内侧壁3221向外倾斜；和/或所述外侧壁3222向内倾斜。
在某些实施方式中，所述本体321形成有收容腔3213，所述本体321套设在所述激光投射器31上，以使所述激光投射器31伸入所述收容腔3213内。
在某些实施方式中，所述激光投射器31包括镜筒312，所述本体321套设在所述镜筒312上。
在某些实施方式中，所述激光投射器31包括镜筒312、衍射元件315和保护盖316，所述衍射元件315收容在所述镜筒312内，所述保护盖316安装在所述镜筒312上以防止 所述衍射元件315从所述镜筒312内脱出，所述本体321套设在所述保护盖316上。
在某些实施方式中，所述本体321包括顶部3211和侧部3212，所述顶部3211与所述保护盖316贴合，所述侧部3212自所述顶部3211延伸，所述侧部3212与所述顶部3211共同围成所述收容腔3213。
在某些实施方式中，所述抵持部322包括内侧壁3221和外侧壁3222；
沿所述激光投射器31的出光方向上，所述内侧壁3221向外倾斜，所述外侧壁3222与所述顶部3211垂直；或
沿所述激光投射器31的出光方向上，所述外侧壁3222向内倾斜，所述内侧壁3221与所述顶部3211垂直。
在某些实施方式中，所述密封件32的材料为硅胶或橡胶。
本申请实施方式的电子装置100包括壳体10、盖板20和上述任一实施方式所述的激光投射结构30，所述盖板20安装在所述壳体10上；所述激光投射结构30安装在所述壳体10内，所述出光面3161朝向所述盖板20，所述抵持部322抵持所述盖板20且用于密封所述出光面3161与所述盖板20之间的间隙。
在某些实施方式中，所述壳体10包括前壳11和后壳12，所述盖板20安装在所述前壳11上，
所述激光投射结构30安装在所述前壳11上，所述后壳12抵持所述激光投射器31的与所述出光面3161相背的一侧；或
所述电子装置100还包括支架50，所述支架50安装在所述前壳11与所述后壳12之间，所述激光投射结构30安装在所述支架50上。
请参阅图1，本申请实施方式的电子装置100包括壳体10、盖板20和激光投射结构30。电子装置100可以是手机、平板电脑、手提电脑、游戏机、头显设备、门禁系统、柜员机等，本申请实施例以电子装置100是手机为例进行说明，可以理解，电子装置100的具体形式可以是其他，在此不作限制。
请结合图2，壳体10可以作为电子装置100的外壳，壳体10可以作为盖板20和激光投射结构30的安装载体，壳体10可以给激光投射结构30提供防尘、防水、防摔的保护，壳体10上还可以安装有显示屏、电池等元器件。在本申请实施例中，壳体10包括前壳11和后壳12，前壳11与后壳12互相结合并将激光投射结构30收容在前壳11与后壳12之间，前壳11与后壳12可以采用不锈钢、铝合金、塑料等材料制成。前壳11上还可以开设有穿孔111，电子装置100的功能模组(例如激光投射结构30、红外成像模组、可见光成像模组、受话器等)可以穿入穿孔111中，并向外界发射光信号、声信号等信号或接收外界的光信号等。
盖板20安装在壳体10上，具体地，在本申请实施例中，盖板20安装在前壳11上，盖板20与激光投射结构30分别从前壳11的相背的两侧安装在前壳11上。盖板20安装在前壳11上后可以遮盖电子装置100的显示屏，盖板20可以是透光的，盖板20的材料可以是透光的玻璃、树脂、塑料等。
请参阅图1和图2，激光投射结构30安装在壳体10内，在本申请实施例中，激光投射结构30安装在前壳11上，具体地，激光投射结构30穿入前壳11的穿孔111以安装在前壳11上，激光投射结构30与穿孔111的内壁之间可以填充有胶水以辅助固定激光投射结构30。激光投射结构30的两侧分别由盖板20和后壳12抵持以进一步固定激光投射结构30的位置。激光投射结构30包括激光投射器31和密封件32。
激光投射器31包括基板组件311、镜筒312、光源313、准直元件314、衍射元件315和保护盖316。其中基板组件311包括基板3112和电路板3111，电路板3111设置在基板3112上，电路板3111用于与电子装置100的主板40电连接，电路板3111可以是印刷电路板、柔性电路板或软硬结合板。镜筒312设置在基板组件311上，镜筒312形成有中空的腔体。光源313设置在基板组件311上，光源313可以设置在电路板3111上的收容孔3113内且通过导线(图未示)与电路板3111电连接，光源313可以是垂直腔面发射激光器(Vertical Cavity Surface Emitting Laser,VCSEL)或边发射激光器(edge-emitting laser，EEL)，光源313在电能的驱动下发射激光，激光可以是红外光。准直元件314设置在镜筒312内，准直元件314可以是透镜，准直元件314用于准直光源313发射的激光。衍射元件315设置在镜筒312内，经准直元件314准直后的激光穿过衍射元件315，衍射元件315将激光衍射出预定的激光图案后从激光投射器31中发射出去。保护盖316安装在镜筒312上，具体地，保护盖316罩设在镜筒312上，保护盖316与镜筒312可以是可拆装地固定连接，保护盖316用于将衍射元件315限制在镜筒312内以防止衍射元件315从镜筒312内脱出。激光投射器31形成有出光面3161，出光面3161朝向盖板20，激光投射器31的与出光面3161相背的一侧由后壳12抵持，激光穿过出光面3161后从激光投射器31中穿出，激光再穿过盖板20后从电子装置100中穿出。具体地，出光面3161上形成有出光口317，激光从出光口317穿出以从激光投射器31中穿出，在本申请实施例中，出光口317开设在保护盖316上。
请参阅图2和图3，密封件32安装在激光投射器31上，密封件32用于密封出光面3161与盖板20之间的间隙，以防止灰尘或水汽等杂质从出光口317进入到激光投射器31中。密封件32包括本体321和抵持部322，密封件32可以由弹性较好的材料制成，例如密封件32可以由硅胶或橡胶等制成。
请结合图4和图5，本体321与激光投射器31固定连接，具体地，本体321设置在出 光面3161并与激光投射器31固定连接。在本申请实施例中，本体321固定在保护盖316上，本体321包括顶部3211和侧部3212。顶部3211与保护盖316贴合，顶部3211上开设有过光口3214，过光口3214与出光口317对准，侧部3212自顶部3211延伸，侧部3212与顶部3211共同围成收容腔3213。本体321套设在激光投射器31上以使激光投射器31伸入收容腔3213内，具体地，保护盖316伸入收容腔3213内以使本体321套设在保护盖316上，收容腔3213的形状可以与保护盖316的外形和大小相似，本体321可以包紧保护盖316以使本体321与保护盖316能够较好地结合在一起。
抵持部322自本体321沿激光投射器31的出光方向(如图2的X方向)延伸，具体地，抵持部322自本体321的顶部3211延伸。抵持部322用于抵持盖板20以密封出光面3161与盖板20之间的间隙，抵持部322的顶端受到挤压后发生弹性形变并与盖板20更紧密地贴合，灰尘、水汽等不易从抵持部322与盖板20之间的间隙进入激光投射结构30中。在本申请实施例中，抵持部322呈环状并环绕出光口317设置，具体地，抵持部322可以是呈圆环状、矩形环状、椭圆形环状等形状，抵持部322环绕出光口317设置以从多个方向防止杂质进入出光口317，给激光投射器31提供更好的保护。
抵持部322包括内侧壁3221和外侧壁3222，其中内侧壁3221较外侧壁3222更接近过光口3214，内侧壁3221与外侧壁3222相交于抵持部322的顶端，当该顶端受到挤压时，内侧壁3221与外侧壁3222可以同时发生形变。在本申请实施例中，沿激光投射器31的出光方向上，抵持部322的截面宽度逐渐减小，也就是说，沿激光投射器31的出光方向上，内侧壁3221与外侧壁3222之间的间隔逐渐减小，以使得抵持部322与盖板20抵持的部位的应力较集中，抵持部322与盖板20贴附得较紧密，抵持部322的密封效果较佳。在如图3所示的实施例中，沿激光投射器31的出光方向上，内侧壁3221向外倾斜，同时外侧壁3222向内倾斜。在本申请实施例中，出光方向与出光面3161指向盖板20的方向相同。
在安装电子装置100时，可以先将密封件32安装在激光投射器31中以组成激光投射结构30，然后将激光投射结构30安装在前壳11的穿孔111中，再将后壳12与前壳11结合以使后壳12抵持住激光投射器31的一侧，最后再将盖板20结合在前壳11上，使得盖板20与密封件32的抵持部322相抵持。也可以先将盖板20结合在前壳11上，再将激光投射结构30安装在前壳11的穿孔111中，此时抵持部322与盖板20接触，最后将后壳12与前壳11结合，后壳12抵持住激光投射器31使得激光投射器31挤压密封件32，抵持部322被挤压变形并紧密地贴附在盖板20上。
现有技术中，灰尘等杂质容易从结构光投射器的出光面中进入结构光投射器内部中去，导致结构光投射器无法正常工作。本申请实施方式的电子装置100中，密封件32的抵持部322自本体321沿激光投射器31的出光方向延伸，抵持部322与盖板20抵持，抵持部322 可以密封激光投射器31的出光面3161与盖板20之间的间隙，避免灰尘等杂质进入激光投射器31的内部。
请参阅图1和图6，在某些实施方式中，电子装置100还包括支架50，支架50安装在前壳11与后壳12之间，激光投射结构30安装在支架50上。具体地，激光投射器31安装在支架50上并从支架50中伸出，激光投射器31伸出支架50的部分和密封件32共同穿入前壳11的穿孔111中。密封件32的抵持部322与盖板20抵持。
请参阅图2，在某些实施方式中，激光投射器31也可以不包括保护盖316，出光面3161为镜筒312的顶面，密封件32的本体321直接套设在镜筒312上，本体321的顶部3211结合到出光面3161上，本体321的侧部3212套设在镜筒312上，同时，本体321的顶部3211可防止衍射元件315从镜筒312中脱出。
请参阅图2和图3，在某些实施方式中，本体321的具体结构也不限于上述的讨论，在一个例子中，本体321可以不包括上述的侧部3212且未形成收容腔3213，本体321的顶部3211直接结合在保护盖316上，例如通过胶粘的方式将顶部3211固定在保护盖316上，抵持部322自本体321延伸。
请参阅3和图7，在某些实施方式中，抵持部322的内侧壁3221和外侧壁3222的延伸方向也可以有其他方式，在如图7a所示的例子中，沿激光投射器31的出光方向上，可以是内侧壁3221向外倾斜，外侧壁3222与顶部3211垂直，如此，当抵持部322被盖板20挤压时，抵持部322向外倾而不会向内倾，避免抵持部322遮挡到过光口3214。在如图7b所示的例子中，沿激光投射器31的出光方向上，也可以是外侧壁3222向内倾斜，内侧壁3221与顶部3211垂直。
请参阅图2和图8，在某些实施方式中，光源313为边发射激光器313，具体地，边发射激光器313可以是分布反馈式激光器(Distributed Feedback Laser，DFB)。边发射激光器313整体呈柱状，边发射激光器313远离基板组件311的一个端面形成有发光面3131，激光从发光面3131发出，发光面3131朝向准直元件314。采用边发射激光器313作为光源，一方面边发射激光器313较VCSEL阵列的温漂较小，另一方向，由于边发射激光器313为单点发光结构，无需设计阵列结构，制作简单，激光投射器31的光源313成本较低。
请结合图9，在某些实施方式中，激光投射器31还包括固定件318，固定件318用于将边发射激光器313固定在基板组件311上。分布反馈式激光器的激光在传播时，经过光栅结构的反馈获得功率的增益。要提高分布反馈式激光器的功率，需要通过增大注入电流和/或增加分布反馈式激光器的长度，由于增大注入电流会使得分布反馈式激光器的功耗增大并且出现发热严重的问题，因此，为了保证分布反馈式激光器能够正常工作，需要增加分布反馈式激光器的长度，导致分布反馈式激光器一般呈细长条结构。当边发射激光器313 的发光面3131朝向准直元件314时，边发射激光器313呈竖直放置，由于边发射激光器313呈细长条结构，边发射激光器313容易出现跌落、移位或晃动等意外，因此通过设置固定件318能够将边发射激光器313固定住，防止边发射激光器313发生跌落、移位或晃动等意外。
具体地，在某些实施方式中，固定件318包括封胶3181，封胶3181设置在边发射激光器313与基板组件311之间。更具体地，在如图8所示的例子中，边发射激光器313的与发光面3131相背的一面粘接在基板组件311(具体可以为基板3112)上。在如图9所示的例子中，边发射激光器313的侧面3132也可以粘接在基板组件311上，封胶3181包裹住四周的侧面3132，也可以仅粘结侧面3132的某一个面与基板组件311或粘结某几个面与基板组件311。进一步地，封胶3181可以为导热胶，以将光源313工作产生的热量传导至基板组件311中。
请参阅图10，在某些实施方式中，固定件318包括支撑架3182，支撑架3182设置在基板组件311上，边发射激光器313固定在支撑架3182上。支撑架3182的数量可以是多个，多个支撑架3182可以共同包围边发射激光器313，在安装时可以将边发射激光器313直接安装在多个支撑架3182之间。在一个例子中，多个支撑架3182共同夹持边发射激光器313，以进一步防止边发射激光器313发生晃动。支撑架3182可以是具有弹性的支撑架3182，边发射激光器313被夹持在多个支撑架3182中时，多个支撑架3182被撑开并夹持边发射激光器313。
在本说明书的描述中，参考术语“某些实施方式”、“一个实施方式”、“一些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”的描述意指结合所述实施方式或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个所述特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个，除非另有明确具体的限定。
尽管上面已经示出和描述了本申请的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本申请的限制，本领域的普通技术人员在本申请的范围内可以对上述实施例进行变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (21)

  1. 一种激光投射结构，其特征在于，包括：
    激光投射器，所述激光投射器形成有出光面；和
    密封件，所述密封件包括本体和抵持部，所述本体设置在所述出光面上并与所述激光投射器结合，所述抵持部自所述本体沿所述激光投射器的出光方向延伸。
  2. 根据权利要求1所述的激光投射结构，其特征在于，所述激光投射器包括形成在所述出光面上的出光口，所述抵持部呈环形且环绕所述出光口设置。
  3. 根据权利要求1所述的激光投射结构，其特征在于，沿所述激光投射器的出光方向上，所述抵持部的截面宽度逐渐减小。
  4. 根据权利要求3所述的激光投射结构，其特征在于，所述抵持部包括内侧壁和外侧壁，沿所述激光投射器的出光方向上，所述内侧壁向外倾斜；和/或所述外侧壁向内倾斜。
  5. 根据权利要求1所述的激光投射结构，其特征在于，所述本体形成有收容腔，所述本体套设在所述激光投射器上，以使所述激光投射器伸入所述收容腔内。
  6. 根据权利要求5所述的激光投射结构，其特征在于，所述激光投射器包括镜筒，所述本体套设在所述镜筒上。
  7. 根据权利要求5所述的激光投射结构，其特征在于，所述激光投射器包括镜筒、衍射元件和保护盖，所述衍射元件收容在所述镜筒内，所述保护盖安装在所述镜筒上以防止所述衍射元件从所述镜筒内脱出，所述本体套设在所述保护盖上。
  8. 根据权利要求7所述的激光投射结构，其特征在于，所述本体包括顶部和侧部，所述顶部与所述保护盖贴合，所述侧部自所述顶部延伸，所述侧部与所述顶部共同围成所述收容腔。
  9. 根据权利要求8所述的激光投射结构，其特征在于，所述抵持部包括内侧壁和外侧壁；
    沿所述激光投射器的出光方向上，所述内侧壁向外倾斜，所述外侧壁与所述顶部垂直；或
    沿所述激光投射器的出光方向上，所述外侧壁向内倾斜，所述内侧壁与所述顶部垂直。
  10. 根据权利要求1所述的激光投射结构，其特征在于，所述密封件的材料为硅胶或橡胶。
  11. 一种电子装置，其特征在于，包括壳体、盖板和激光投射结构，所述盖板安装在所述壳体上，所述激光投射结构包括：
    激光投射器，所述激光投射器形成有出光面；和
    密封件，所述密封件包括本体和抵持部，所述本体设置在所述出光面上并与所述激光投射器结合，所述抵持部自所述本体沿所述激光投射器的出光方向延伸；
    所述激光投射结构安装在所述壳体内，所述出光面朝向所述盖板，所述抵持部抵持所述盖板且用于密封所述出光面与所述盖板之间的间隙。
  12. 根据权利要求11所述的电子装置，其特征在于，所述激光投射器包括形成在所述出光面上的出光口，所述抵持部呈环形且环绕所述出光口设置。
  13. 根据权利要求11所述的电子装置，其特征在于，沿所述激光投射器的出光方向上，所述抵持部的截面宽度逐渐减小。
  14. 根据权利要求13所述的电子装置，其特征在于，所述抵持部包括内侧壁和外侧壁，沿所述激光投射器的出光方向上，所述内侧壁向外倾斜；和/或所述外侧壁向内倾斜。
  15. 根据权利要求11所述的电子装置，其特征在于，所述本体形成有收容腔，所述本体套设在所述激光投射器上，以使所述激光投射器伸入所述收容腔内。
  16. 根据权利要求15所述的电子装置，其特征在于，所述激光投射器包括镜筒，所述本体套设在所述镜筒上。
  17. 根据权利要求15所述的电子装置，其特征在于，所述激光投射器包括镜筒、衍射元件和保护盖，所述衍射元件收容在所述镜筒内，所述保护盖安装在所述镜筒上以防止所 述衍射元件从所述镜筒内脱出，所述本体套设在所述保护盖上。
  18. 根据权利要求17所述的电子装置，其特征在于，所述本体包括顶部和侧部，所述顶部与所述激光投射器贴合，所述侧部自所述顶部延伸，所述侧部与所述顶部共同围成所述收容腔。
  19. 根据权利要求18所述的电子装置，其特征在于，所述抵持部包括内侧壁和外侧壁；
    沿所述激光投射器的出光方向上，所述内侧壁向外倾斜，所述外侧壁与所述顶部垂直；或
    沿所述激光投射器的出光方向上，所述外侧壁向内倾斜，所述内侧壁与所述顶部垂直。
  20. 根据权利要求11所述的电子装置，其特征在于，所述密封件的材料为硅胶或橡胶。
  21. 根据权利要求11至20任意一项所述的电子装置，其特征在于，所述壳体包括前壳和后壳，所述盖板安装在所述前壳上，
    所述激光投射结构安装在所述前壳上，所述后壳抵持所述激光投射器的与所述出光面相背的一侧；或
    所述电子装置还包括支架，所述支架安装在所述前壳与所述后壳之间，所述激光投射结构安装在所述支架上。
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