A laser light source device and a projection apparatus

Abstract

The application relates to the projection field and discloses a laser light source device and a projection equipment. The laser light source device comprises a shell, a light emitting device and a sealing ring, and the sealing ring is fixed between the shell and the light emitting device. The shell comprises a first surface; a sealing platform is arranged on the first surface, and the sealing platform protrudes from the first surface. The light emitting device comprises a cover plate and a base, the base is connected with the cover plate and fixed to the shell. The sealing ring comprises a main body part and two protruding parts. The two protruding parts are a first protruding part and a second protruding part respectively. The main body part comprises a first plane, a second plane and a diaphragm opening. The first plane is in sealing contact with the sealing platform. The second plane is in sealing contact with the cover plate. The diaphragm opening penetrates through the main body part along the arrangement direction of the first plane and the second plane and is used for allowing a light beam emitted by the light emitting device to pass through. The two protruding parts are arranged on opposite sides of the main body part along a first direction and cooperate with the first plane to form a limiting groove; the limiting groove is inter-engaged with the sealing platform.

Description

Technical Field

[0001] This application relates to the field of projection technology, and in particular to a laser light source device and projection equipment. Background Technology

[0002] With the increasing popularity of projection devices, market competition is becoming more and more intense, and the demand for miniaturization and low cost is becoming increasingly prominent. Miniaturization is the future development trend of projection devices. To achieve the goal of miniaturization, the various components that make up the projection device need to be miniaturized. As the most important part of the projection device, the light-emitting device has limited space for fixing and sealing when it is miniaturized. Ensuring the reliability of fixing and sealing is both important and difficult. Utility Model Content

[0003] This application discloses a laser light source device and a projection device, which are used to improve the sealing reliability between the miniaturized light-emitting device and the housing while ensuring the fixation reliability between the miniaturized light-emitting device and the housing.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] In a first aspect, embodiments of this application provide a laser source device, including:

[0006] The housing includes a first surface; a sealing platform is provided on the first surface, the sealing platform protruding from the first surface;

[0007] Light-emitting devices, including:

[0008] Cover plate; and

[0009] The base is connected to and fixed to the cover plate and the housing; and

[0010] A sealing ring is fixed between the housing and the light-emitting device; the sealing ring includes:

[0011] Main body; the main body includes:

[0012] The first plane is in sealing contact with the sealing platform;

[0013] The second plane is in sealing contact with the cover plate; and

[0014] An aperture opening extends through the main body along the alignment direction of the first and second planes, allowing the light beam emitted from the light-emitting device to pass through; and

[0015] Two protrusions are disposed on opposite sides of the main body along a first direction and cooperate with the first plane to form a limiting groove; the limiting groove is interlocked with the sealing platform.

[0016] In the aforementioned laser source device, a sealing ring seals the housing and the light-emitting device. Specifically, the sealing ring includes a first surface and a second surface. The first surface is in sealing contact with the housing, and the second surface is in sealing contact with the light-emitting device. The sealing ring also has an aperture opening that allows the light beam to pass through, ensuring that the light beam emitted from the light-emitting device enters the housing through this aperture opening. To improve the fixing reliability and sealing performance of the sealing ring, the sealing ring and the housing are interlocked via a limiting groove and a sealing platform. The interlocked sealing ring and housing prevent the sealing ring from moving relative to the housing. When the light-emitting device is fixed to the housing, the interlocked sealing ring and housing also prevent relative movement between the sealing ring and the light-emitting device, ensuring the fixing reliability of the sealing ring. When there is no relative movement between the sealing ring and the housing, the sealing area between the first surface of the sealing ring and the sealing platform is also guaranteed; similarly, when there is no relative movement between the sealing ring and the light-emitting device, the sealing area between the second surface of the sealing ring and the cover plate is also guaranteed, thereby improving the sealing reliability of the sealing ring. In a specific implementation, a sealing platform protruding from the first surface is provided on the housing, and the sealing platform is in sealing contact with the first surface of the sealing ring. The two protrusions of the sealing ring cooperate with the main body to form a limiting groove.

[0017] During assembly in this embodiment, the sealing ring is first placed on the housing, and the limiting groove of the sealing ring is interlocked with the sealing platform of the housing to achieve pre-fixation of the sealing ring; then the light-emitting device is fixed to the housing, thereby achieving fixation of the sealing ring and sealing of the housing and the light-emitting device.

[0018] The laser light source device provided in this application embodiment can ensure precise alignment between the sealing ring and the housing, improve the fixing reliability of the sealing ring while also improving the sealing reliability between the housing and the light-emitting device, thereby improving the sealing reliability between the miniaturized light-emitting device and the housing while ensuring the fixing reliability between the miniaturized light-emitting device and the housing.

[0019] In some embodiments, a first positioning component is provided between the housing and the sealing ring;

[0020] The first positioning component includes:

[0021] A first positioning protrusion is disposed on the side of the housing facing the sealing ring; and

[0022] A first positioning hole is provided in the main body and is inserted into and engaged with the first positioning protrusion.

[0023] In some embodiments, there are two first positioning components, which are arranged along a second direction; the second direction intersects the first direction.

[0024] In some embodiments, the laser light source device includes a plurality of light-emitting devices, and the sealing ring is located between the housing and the plurality of light-emitting devices;

[0025] The main body includes multiple aperture openings, each aperture opening allowing only one light beam emitted from the light-emitting device to pass through;

[0026] The main body includes a partition located between two adjacent aperture openings; the partition includes:

[0027] The third plane is located on the surface of the partition portion opposite to the housing, and the third plane is flush with the first plane.

[0028] In some embodiments, a sealing rib is provided on the third plane, and the sealing rib protrudes from the third plane; the sealing rib is in sealed contact with the cover plates of the two adjacent light-emitting devices.

[0029] In some embodiments, a fixing component is provided between the housing and the base;

[0030] The fixing component includes:

[0031] A first threaded connector is disposed on the side of the housing facing the base; and

[0032] The second threaded connector passes through the base and is threadedly connected to the first threaded connector.

[0033] In some embodiments, a second positioning component is disposed between the housing and the base; the second positioning component includes:

[0034] A second positioning protrusion is provided on the side of the housing facing the base; and

[0035] The second positioning hole is provided on the base and is inserted into and engaged with the second positioning protrusion.

[0036] In some embodiments, the light-emitting device includes a first end face, and the first end face is provided with a connecting pin protruding from the first end face;

[0037] The laser source device also includes:

[0038] A circuit board, which is electrically connected to the connecting pins and fixed to the housing; and

[0039] A heat sink is thermally connected to the side of the circuit board away from the housing.

[0040] In some embodiments, an elastic element is provided between the circuit board and the housing;

[0041] And / or, a flexible thermal conductive element is provided between the circuit board and the heat sink.

[0042] Secondly, embodiments of this application also provide a projection device, including:

[0043] A laser source device, wherein the laser source device is any of the laser source devices described in the first aspect embodiment;

[0044] An illumination optical path, located on the light-emitting side of the laser source device, is used to modulate the light beam emitted from the laser source device; and

[0045] A projection lens, located on the light-emitting side of the illumination optical path, is used to image the modulated light beam. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application;

[0047] Figure 2 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application;

[0048] Figure 3 An exploded view of a laser source device provided in an embodiment of this application;

[0049] Figure 4 A cross-sectional view of a laser source device provided in an embodiment of this application. Figure 1 ;

[0050] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0051] Figure 6 A cross-sectional view of a laser source device provided in an embodiment of this application. Figure 2 ;

[0052] Figure 7 for Figure 6 Enlarged view at point B in the middle;

[0053] Figure 8 This is a three-dimensional perspective view of the shell in the embodiments of this application;

[0054] Figure 9 for Figure 8 Enlarged view of the central sealing platform;

[0055] Figure 10 This is a schematic diagram of one side of the shell structure in an embodiment of this application;

[0056] Figure 11 This is a three-dimensional perspective view of the sealing ring in the embodiments of this application;

[0057] Figure 12 This is a bottom view of the sealing ring in an embodiment of this application;

[0058] Figure 13 This is a front view of the sealing ring in an embodiment of this application;

[0059] Figure 14 This is a three-dimensional perspective view of another sealing ring in an embodiment of this application;

[0060] Figure 15 This is a top view of another sealing ring in an embodiment of this application;

[0061] Figure 16 This is a bottom view of another sealing ring in an embodiment of this application;

[0062] Figure 17 This is a front view of the sealing ring in an embodiment of this application;

[0063] Figure 18 This is a schematic diagram of the structure of the light-emitting device in the embodiments of this application;

[0064] Figure 19 This is a schematic diagram of the connection structure between the light-emitting device and the circuit board in an embodiment of this application;

[0065] Figure 20 This is a schematic diagram of another laser source device in the embodiments of this application;

[0066] Icons: 1-Projection device; 2-Projection screen; 10-Laser light source device; 20-Illumination optical path; 30-Projection lens; 100-Housing; 101-First surface; 110-Sealing platform; 120-First threaded connector; 130-Second positioning protrusion; 140-Third threaded connector; 111-First positioning protrusion; 200-Light-emitting device; 210-Cover plate; 220-Base; 230-Laser chip; 240-Collimating lens; 250-Connecting pin; 221-Second positioning hole; 222-First fixing hole; 300 - Sealing ring; 310 - Main body; 320 - Protrusion; 320a - First protrusion; 320b - Second protrusion; 301 - Limiting groove; 302 - First positioning hole; 311 - First plane; 312 - Second plane; 313 - Aperture opening; 314 - Partition; 315 - Sealing rib; 3141 - Third plane; 400 - Circuit board; 401 - Second fixing hole; 410 - First electrical connection end; 420 - Second electrical connection end; 500 - Heat sink; 601 - Elastic element; 602 - Elastic heat-conducting element. Detailed Implementation

[0067] First, let's introduce the application scenario of this application: With the popularization of projection equipment, market competition is becoming increasingly fierce, and the demand for miniaturization and low cost is becoming more prominent. As the most important component of projection equipment, the miniaturization and low cost of the light-emitting device itself have become the direction of future industrial development. During the use of projection equipment, the fixation reliability, functional connection reliability, and sealing level of the light-emitting device directly affect its long-term performance. Especially when the usable area of ​​the light-emitting device is small, and the collimating lens and collimating lens adhesive dots are close to the edge of the sealing surface, how to achieve a seal within a limited sealing width while ensuring a safe gap between the sealing ring and the collimating lens, and ensuring that the force of the sealing ring on the collimating lens adhesive dots is within its allowable range, poses a significant challenge to the structural design and the material selection requirements for the sealing ring. If the sealing ring interferes with the collimating lens, or if the force of the sealing ring on the collimating lens adhesive dots exceeds its allowable range, the collimating lens will shift, and the light beam emitted by the chip of the light-emitting device will deviate from the theoretical path when propagating through the collimating lens, thus affecting the luminous flux (brightness) and color uniformity of the projection equipment.

[0068] Based on the above application scenarios, this application provides a laser light source device and a projection device to achieve a high level of sealing and reliable connection for miniaturized light-emitting devices.

[0069] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships, for example, A and / or B can represent: A alone, A and B at the same time, and B alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0070] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0071] Figure 1 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application.

[0072] like Figure 1 As shown, the projection system includes a projection device 1 and a projection screen 2. The projection screen 2 is located on the light-emitting side of the projection device 1. The audience faces the projection screen 2. The projection device 1 emits projection light, which enters the projection screen 2 and is reflected by the projection screen 2 before entering the viewer's eyes, thus allowing the viewer to see the projected image.

[0073] In some embodiments, the projection device 1 can be an ultra-short-throw laser projection device. Ultra-short-throw laser projection devices have the characteristics of small projection distance and large projection screen, making them very suitable for home use. To achieve better brightness and display effect, they can be used in conjunction with a projection screen 2.

[0074] Figure 2 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application.

[0075] like Figure 2 As shown, the projection device provided in this application embodiment includes: a laser light source device 10, an illumination optical path 20, and a projection lens 30; the illumination optical path 20 is located on the light-emitting side of the laser light source device 10 and is used to modulate the light beam emitted by the laser light source device 10; the projection lens 30 is located on the light-emitting side of the illumination optical path 20 and is used to image the modulated light beam.

[0076] Figure 3 An exploded view of a laser source device provided in an embodiment of this application; Figure 4 A cross-sectional view of a laser source device provided in an embodiment of this application. Figure 1 ; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 A cross-sectional view of a laser source device provided in an embodiment of this application. Figure 2 ; Figure 7 for Figure 6 Enlarged view of section B in the middle.

[0077] like Figures 3 to 7 As shown, this application embodiment provides a laser source device 10, including a housing 100, a light-emitting device 200, and a sealing ring 300, wherein the sealing ring 300 is fixed between the housing 100 and the light-emitting device 200. Wherein:

[0078] The housing 100 includes a first surface 101; a sealing platform 110 is provided on the first surface 101, and the sealing platform 110 protrudes from the first surface 101.

[0079] The light-emitting device 200 includes a cover plate 210 and a base 220, with the base 220 connected to the cover plate 210 and fixed to the housing 100.

[0080] The sealing ring 300 includes a main body 310 and two protrusions 320. The two protrusions 320 are a first protrusion 320a and a second protrusion 320b. The main body 310 includes a first plane 311, a second plane 312, and an aperture opening 313. The first plane 311 is in sealing contact with the sealing platform 110. The second plane 312 is in sealing contact with the cover plate 210. The aperture opening 313 extends through the main body 310 along the arrangement direction of the first plane 311 and the second plane 312, allowing the light beam emitted from the light-emitting device 200 to pass through. The two protrusions 320 are disposed on opposite sides of the main body 310 along a first direction and cooperate with the first plane 311 to form a limiting groove 301; the limiting groove 301 is interlocked with the sealing platform 110.

[0081] In the aforementioned laser source device, a sealing ring 300 seals the housing 100 and the light-emitting device 200. Specifically, the sealing ring 300 includes a first surface 101 and a second surface. The first surface 101 is in sealing contact with the housing 100, and the second surface is in sealing contact with the light-emitting device 200. This sealing contact can be understood as two or more components forming a sealed state when in contact, the purpose of which is to prevent gas, liquid, or other substances from leaking or entering through gaps between the contact surfaces. The sealing contact between the sealing ring 300 and the housing 100 or the cover plate 210 can be precisely designed and manufactured to ensure complete fit between the contact surfaces, thereby achieving airtightness and structural stability. The sealing ring 300 also has an aperture opening 313 that allows the light beam to pass through, ensuring that the light beam emitted from the light-emitting device 200 enters the interior of the housing 100 through this aperture opening 313. To improve the fixing reliability and sealing performance of the sealing ring 300, the sealing ring 300 and the housing 100 are interlocked by a limiting groove 301 and a sealing platform 110. The interlocking sealing ring 300 and housing 100 prevent the sealing ring 300 from moving relative to the housing 100. When the light-emitting device 200 is fixed to the housing 100, the interlocking sealing ring 300 and housing 100 also prevent relative movement between the sealing ring 300 and the light-emitting device 200, ensuring the reliability of the sealing ring 300's fixation. When there is no relative movement between the sealing ring 300 and the housing 100, the sealing area between the first surface 101 of the sealing ring 300 and the sealing platform 110 is also guaranteed; similarly, when there is no relative movement between the sealing ring 300 and the light-emitting device 200, the sealing area between the second surface of the sealing ring 300 and the cover plate 210 is also guaranteed, thereby improving the sealing reliability of the sealing ring 300. In a specific implementation, the housing 100 is provided with a sealing platform 110 protruding from the first surface 101, and the sealing platform 110 is in sealing contact with the first surface 101 of the sealing ring 300. The two protrusions 320 of the sealing ring 300 cooperate with the main body 310 to form a limiting groove 301.

[0082] like Figure 3As shown, during assembly in this embodiment, the sealing ring 300 is first placed on the housing 100, and the limiting groove 301 of the sealing ring 300 is interlocked with the sealing platform 110 of the housing 100 to achieve pre-fixation of the sealing ring 300; then the light-emitting device 200 is fixed to the housing 100, thereby achieving the fixing of the sealing ring 300 and the sealing of the housing 100 and the light-emitting device 200.

[0083] The laser light source device provided in this application embodiment can ensure precise alignment between the sealing ring 300 and the housing 100, improve the fixing reliability of the sealing ring 300, and at the same time improve the sealing reliability between the housing 100 and the light-emitting device 200. Thus, while ensuring the fixing reliability between the miniaturized light-emitting device 200 and the housing 100, the sealing reliability between the miniaturized light-emitting device 200 and the housing 100 is improved.

[0084] In some embodiments, such as Figure 4 and Figure 5 As shown, the light-emitting device 200 includes a base 220, a laser chip 230, a cover plate 210, and a sealing glass. The base 220 and the sealing glass are respectively fixed to opposite sides of the cover plate 210, forming a cavity to accommodate the laser chip 230. The sealing glass is located on the light-emitting side of the laser chip 230. A collimating lens 240 is bonded to the sealing glass, which is used to correct the beam emitted from the laser chip 230 into a parallel beam. Since the usable area of ​​the small light-emitting device 200 is relatively small, when fixing the small light-emitting device 200 to the housing 100, it is necessary to ensure both the fixed area and the sealing area of ​​the small light-emitting device 200. In a specific implementation, the cover plate 210 of the light-emitting device 200 is welded to the sealing glass, and the cover plate 210 is also welded to the base 220 to achieve internal sealing of the light-emitting device 200. The laser chip 230 is welded onto the base 220 of the light-emitting device 200 for emitting light. A collimating lens 240 is provided on the sealing glass, and the collimating lens 240 is glued to the sealing glass.

[0085] When the light-emitting device 200 is fixed to the housing 100, the sealing ring 300 contacts the cover plate 210 of the light-emitting device 200 and surrounds the outside of the collimating lens 240. To prevent interference between the sealing ring 300 and the collimating lens 240, or to prevent the force exerted by the sealing ring 300 on the adhesive dots of the collimating lens 240 from exceeding the allowable range, a safety gap is required between the sealing ring 300 and the collimating lens 240, and a safety gap is also required between the sealing ring 300 and the adhesive dots of the collimating lens 240. All of these safety gaps are greater than zero. To ensure the sealing performance between the housing 100 and the light-emitting device 200, a certain contact area is required between the sealing ring 300 and the cover plate 210 of the light-emitting device 200. Along the radial direction of the sealing ring 300, the width of the contact area between the sealing ring 300 and the cover plate 210 is the sealing width of the light-emitting device 200, which must be greater than zero.

[0086] To ensure the sealing and reliability of the small light-emitting device 200, this embodiment calculates and analyzes the sealing width of the light-emitting device 200, the size of the collimating lens 240, the structural design and material selection of the sealing ring 300, and the width control and material selection of the adhesive used to fix the collimating lens 240.

[0087] S01, Sealing width of the light-emitting device:

[0088] Calculations are based on the dimensional chain formed by the housing, the light-emitting device, and the sealing ring. It is ensured that, under extreme conditions, the overlap width between the sealing ring and the light-emitting device is greater than 0.

[0089] S02, Gap between collimating lens and sealing ring:

[0090] The dimensional chain consisting of the collimating lens, the sealing ring, and the housing is calculated to ensure that the gap between the collimating lens and the sealing ring is greater than 0 under extreme conditions.

[0091] S03. Gap between the adhesive used for the collimating lens and the sealing ring:

[0092] The dimensional chain of the collimating lens adhesive, sealing ring, and housing is calculated to ensure that the gap between the collimating lens adhesive and the sealing ring is greater than 0 under extreme conditions. Considering the need for miniaturization of light-emitting devices, if the gap between the adhesive and the sealing ring is less than 0, S04 is required.

[0093] S04. Stress calculation and material selection for the adhesive used in collimating lenses and material selection for sealing rings.

[0094] The width of the sealing ring before and after compression is calculated as follows:

[0095] thickness H [ h2 ] width W w = S / h2 = H*W / h2 Cross-sectional area S = H * W S = H * W

[0096] The stress calculation for the glue used to collimate the lens is as follows:

[0097] The theoretical basis for the force analysis of glue used in collimating lenses: Hooke's Law

[0098] The force between the glue and the sealing ring of the collimating lens is: F = KX = EAx / L

[0099] E1A1x1 / L1=E2A2x2 / L2

[0100] The total deformation Δw between the adhesive and the sealing ring of the collimating lens is Δw = x1 + x2 = 0.2

[0101] The elastic modulus of the adhesive is E1 = 289 MPa

[0102] The elastic modulus of the sealing ring is E2 = 0.4 MPa.

[0103] The original length of the collimating lens, w1 = 1.65.

[0104] The original length of the sealing ring, w2, is 0.7.

[0105] The selection and calculation of materials for the collimating lens adhesive and sealing ring are as follows:

[0106]

[0107]

[0108] Based on the above calculations and analysis, the sealing solution provided in this application embodiment is described as follows:

[0109] The sealing ring 300 includes a main body 310 and two protrusions 320. The main body 310 is used to cooperate with the sealing area on the cover plate 210 of the light-emitting device 200 and the sealing area on the sealing platform 110 of the housing 100 to achieve a seal. The main body 310 is provided with an aperture opening 313 to allow the light beam emitted from the light-emitting device 200 to pass through. The two protrusions 320 are provided on opposite sides of the main body 310 along a first direction and cooperate with the main body 310 to form a limiting groove 301; the limiting groove 301 is used to position the sealing ring 300 with the sealing platform 110 of the housing 100, thereby positioning the sealing plane on the sealing ring 300.

[0110] Figure 4 and Figure 5 A cross-sectional view of the laser source device 10 along a first direction is shown. The limiting groove 301 of the sealing ring 300 and the sealing platform 110 interlock in the first direction, thereby limiting the sealing ring 300 in the first direction and preventing the sealing ring 300 from shifting or falling off.

[0111] It should be noted that, Figure 5The main body 310 and the protrusion 320 are divided into regions by a dotted line. In actual implementation, the dotted line does not exist, and the main body 310 and the protrusion 320 are integrally formed structures.

[0112] Figure 6 and Figure 7 A cross-sectional view of the laser source device 10 along a second direction, perpendicular to the first direction, is shown. Figure 6 and Figure 7 As shown, the first surface 101 of the main body 310 contacts the sealing platform 110 of the housing 100, and the second surface contacts the cover of the light-emitting device 200, thereby achieving a seal between the light-emitting device 200 and the housing 100.

[0113] Figure 8 This is a three-dimensional perspective view of the housing 100 in the embodiments of this application; Figure 9 for Figure 8 Enlarged view of point 110 on the central sealing platform; Figure 10 This is a schematic diagram of one side structure of the housing 100 in an embodiment of this application; Figure 11 This is a three-dimensional perspective view of the sealing ring 300 in the embodiment of this application.

[0114] In some embodiments, such as Figures 8 to 11 As shown, a first positioning component is provided between the housing 100 and the sealing ring 300. The first positioning component includes a first positioning protrusion 111 and a first positioning hole 302. The first positioning protrusion 111 is provided on the side of the housing 100 facing the sealing ring 300. The first positioning hole 302 is provided in the main body 310 and is inserted into the first positioning protrusion 111.

[0115] like Figures 8 to 10 As shown, the sealing platform 110 is provided with a first positioning protrusion 111, such as... Figure 11 As shown, the sealing ring 300 is provided with a first positioning hole 302. When the sealing ring 300 is interlocked with the sealing platform 110, the first positioning protrusion 111 penetrates the first positioning hole 302, preventing the sealing ring 300 from shifting relative to the sealing platform 110 and ensuring the contact area between the sealing ring 300, the sealing platform 110, and the cover. It is understood that the housing 100 is typically a rigid component, such as a metal component. To ensure the sealing effect, the sealing ring 300 is typically an elastic component 601, such as a rubber component. The first positioning protrusion 111 is provided on the sealing platform 110. The first positioning protrusion 111 is also a rigid component, which prevents the sealing ring 300 from shifting due to deformation of the first positioning protrusion 111 itself, thus ensuring the sealing effect of the sealing ring 300.

[0116] In some other embodiments, a first positioning protrusion 111 is provided on the main body 310, and a first positioning hole 302 is provided on the sealing platform 110 on the side facing the sealing ring 300.

[0117] In some embodiments, such as Figure 10 and Figure 11 As shown, there are two first positioning components, which are arranged along the second direction; the second direction intersects the first direction.

[0118] In specific implementation, in the first direction, the sealing ring 300 and the sealing platform 110 are interlocked to prevent the sealing ring 300 from shifting along the first direction; in the second direction, the first positioning hole 302 on the sealing ring 300 and the first positioning protrusion 111 on the sealing platform 110 cooperate to prevent the sealing ring 300 from shifting along the second direction, thereby ensuring the contact area between the sealing ring 300 and the sealing platform 110 and further improving the sealing effect. In one implementation, the first direction is perpendicular to the second direction.

[0119] like Figure 11 As shown, the sealing ring 300 is provided with two first positioning holes 302, which are arranged opposite to each other on both sides of the sealing ring 300. In order to compensate for the reduced strength of the main body 310 due to the provision of the first positioning holes 302, the main body 310 extends outward to form an arc-shaped part, thereby increasing the strength of the main body 310 while avoiding stress concentration.

[0120] In some embodiments, such as Figure 3 As shown, the laser source device includes multiple light-emitting devices 200, and a sealing ring 300 simultaneously seals the housing 100 and the multiple light-emitting devices 200.

[0121] The sealing configuration of the aforementioned sealing ring 300 with the housing 100 and the plurality of light-emitting devices 200 has multiple options. For example, one sealing ring 300 seals one light-emitting device 200. Alternatively, one sealing ring 300 seals multiple light-emitting devices 200.

[0122] In some embodiments, a sealing ring 300 seals a light-emitting device 200. Specifically, the main body 310 is provided with an aperture opening 313, which only allows the light beam emitted from the light-emitting device 200 to pass through. Alternatively, the sealing ring 300 only makes sealing contact with the cover plate 210 of the light-emitting device 200. It can be understood that the sealing ring 300 is generally U-shaped.

[0123] Figure 12 This is a bottom view of the sealing ring 300 in the embodiment of this application; Figure 13 This is a front view of the sealing ring 300 in the embodiment of this application.

[0124] In other embodiments, such as Figure 11As shown, the main body portion 310 includes a plurality of diaphragm openings 313, and each diaphragm opening 313 allows only the light beam emitted from one light emitting device 200 to pass through. The main body portion 310 includes a partition portion 314 located between two adjacent diaphragm openings 313; the partition portion 314 includes a third flat surface 3141, the third flat surface 3141 is located on the surface of the partition portion 314 facing away from the housing 100, and the third flat surface 3141 is flush with the first flat surface 311.

[0125] In some embodiments of the present application, as shown in Figures 11 to 13 , one sealing ring 300 seals two light emitting devices 200. The main body portion 310 is provided with two diaphragm openings 313, and each diaphragm opening 313 allows only the light beam emitted from one light emitting device 200 to pass through. The two diaphragm openings 313 are separated by the partition portion 314. In specific implementation, the third flat surface 3141 of the partition portion 314 is flush with the first flat surface 311, that is, the surface of the sealing ring 300 on the side facing the light emitting devices 200 is a flat surface, which ensures the sealing performance with the light emitting devices 200. The third flat surface 3141 is in sealing contact with the cover plates 210 of the two light emitting devices 200. It can be understood that the sealing ring 300 as a whole is in the shape of the Chinese character "日".

[0126] Using one sealing ring 300 to seal a plurality of light emitting devices 200 at the same time can reduce the number of parts and facilitate assembly. Meanwhile, sealing the two light emitting devices 200 with the housing 100 using one sealing ring 300 can shorten the gap between the two light emitting devices 200, which is more conducive to the miniaturization of the laser light source device.

[0127] As shown in Figure 12 , the sealing ring 300 includes a first protruding portion 320a and a second protruding portion 320b, the orthographic projection of the first protruding portion 320a on the first flat surface 311 is U-shaped, and the second protruding portion 320b and the first protruding portion 320a are symmetrically arranged on two sides of the main body portion 310. When the sealing ring 300 is assembled with the sealing platform 110, the first protruding portion 320a is in contact with three end surfaces of the sealing platform 110 at the same time, similarly, the second protruding portion 320b is in contact with three end surfaces of the sealing platform 110 at the same time, which further improves the positioning accuracy of the sealing ring 300, and can prevent the sealing ring 300 from displacing relative to the sealing platform 110 in a two-dimensional plane, so as to ensure the sealing performance for the light emitting devices 200.

[0128] As shown in Figure 13 , the first flat surface 311 and the second flat surface 312 serve as sealing surfaces with the housing 100 and the light emitting devices 200, and the flat surface design ensures close fitting with the sealing platform 110 and the cover plates 210. The parallel arrangement of the first flat surface 311 and the second flat surface 312 makes the thickness of the main body portion 310 uniform, thereby further improving the fitting degree of the entire sealing ring 300 with the sealing platform 110 and the cover plates 210.

[0129] Figure 14 This is a three-dimensional perspective view of another sealing ring 300 in the embodiments of this application; Figure 15 This is a top view of another sealing ring 300 in an embodiment of this application; Figure 16 This is a bottom view of another sealing ring 300 in an embodiment of this application; Figure 17 This is a front view of the sealing ring 300 in the embodiment of this application.

[0130] In embodiments where a single sealing ring 300 simultaneously seals multiple light-emitting devices 200, when the aperture opening 313 is large, the width of the partition portion 314 decreases, resulting in reduced strength. The width of the partition portion 314 can be understood as its dimension along the arrangement direction of two adjacent aperture openings 313. To improve the strength of the partition portion 314, such as... Figures 14 to 17 As shown, a sealing rib 315 is provided on the third plane 3141, and the sealing rib 315 protrudes from the third plane 3141; the sealing rib 315 is in sealed contact with the cover plate 210 of the two adjacent light-emitting devices 200.

[0131] In some embodiments, the sealing rib 315 divides the third plane 3141 into a first sub-plane and a second sub-plane. The first sub-plane is in sealing contact with the cover plate 210 of one light-emitting device 200, and the second sub-plane is in sealing contact with the cover plate 210 of another light-emitting device 200.

[0132] In the sealing ring 300 with sealing rib 315, the aperture opening 313 is slightly larger, resulting in a slightly larger safety gap between the sealing ring 300 and the collimating lens 240 of the light-emitting device 200, as well as the adhesive used to fix the collimating lens 240. This is suitable for scenarios where the light-emitting device 200 is more sensitive or the adhesive has lower pressure resistance. However, the increased aperture opening 313 reduces the sealing width between the sealing ring 300 and the light-emitting device 200, which is detrimental to sealing. Nevertheless, the sealing ring 300 has sealing ribs 315 at the middle joint and partition 314. These sealing ribs 315 are located between the two light-emitting devices 200. After the two light-emitting devices 200 are installed, their sides press against the sealing ribs 315, achieving a seal between the light-emitting device 200 and the housing 100.

[0133] like Figure 14 As shown, the sealing rib 315 and the partition part 314 are integrally formed, which avoids the sealing performance of the sealing ring 300 from being affected by the connection reliability of the sealing rib 315 and the partition part 314.

[0134] like Figure 15 and Figure 16 As shown, the width of the sealing rib 315 is the same as the width of the partition portion 314. This ensures that the sealing rib 315 and the partition portion 314 deform in the same amount when subjected to the same force, further improving the sealing performance of the sealing ring 300.

[0135] like Figure 17 As shown, the first protrusion 320a and the second protrusion 320b are arranged along the first direction, and the sealing rib 315 protrudes from the second surface.

[0136] It should be noted that, in order to demonstrate the assembly relationship between the sealing ring 300, the housing 100, and the light-emitting device 200, Figure 3 The diagram shows two types of sealing rings 300: one with sealing ribs 315 and one without. In practical applications, only one sealing ring 300 is needed to seal the housing 100 and the light-emitting device 200.

[0137] Figure 18 This is a schematic diagram of the structure of the light-emitting device 200 in the embodiments of this application.

[0138] In some embodiments, refer to Figure 3 and Figure 9 A fixing component is provided between the housing 100 and the base 220. The fixing component includes a first threaded connector 120 and a second threaded connector (not shown in the figure). The first threaded connector 120 is disposed on the side of the housing 100 facing the base 220; the second threaded connector passes through the base 220 and is threadedly connected to the first threaded connector 120.

[0139] like Figure 9 As shown, the housing 100 is provided with multiple first threaded connectors 120, which in specific implementations are threaded holes. The second threaded connectors are screws. For example... Figure 18 As shown, the base 220 of the light-emitting device 200 is provided with a first fixing hole 222, which is a through hole. When fixing the light-emitting device 200 and the base 220, the second threaded connector passes through the first fixing hole 222 and is threadedly connected to the first threaded connector 120. The threaded connection between the light-emitting device 200 and the base 220 facilitates installation and fixing.

[0140] In some embodiments, refer to Figure 3 and Figure 9 A second positioning component is provided between the housing 100 and the base 220. The second positioning component includes a second positioning protrusion 130 and a second positioning hole 221. The second positioning protrusion 130 is provided on the side of the housing 100 facing the base 220. The second positioning hole 221 is provided on the base 220 and is inserted into the second positioning protrusion 130.

[0141] As shown in Figure 9, a second positioning protrusion 130 is provided on the housing 100, such as... Figure 18As shown, a second positioning hole 221 is provided on the base 220. When the light-emitting device 200 is assembled with the housing 100, the second positioning protrusion 130 passes through the second positioning hole 221 to prevent the light-emitting device 200 from shifting relative to the housing 100, thus ensuring the sealing area between the sealing ring 300 and the cover. It is understood that the housing 100 is typically a rigid component, such as a metal part. The second positioning protrusion 130 is located on the housing 100 and is also a rigid component. The second positioning hole 221 is located on the base 220, which facilitates processing and ensures that the second positioning hole 221 is a through hole. This avoids the problem of a blind hole supporting the base 220 at a certain height when it mates with the second positioning protrusion 130, thus preventing poor contact between the base 220 and the sealing ring 300 and causing sealing failure.

[0142] In other embodiments, the second positioning protrusion 130 is disposed on the base 220, and the second positioning hole 221 is disposed on the housing 100.

[0143] Figure 19 This is a schematic diagram of the connection structure between the light-emitting device 200 and the circuit board 400 in an embodiment of this application; Figure 20 This is a schematic diagram of another laser source device in the embodiments of this application.

[0144] In some embodiments, such as Figure 18 and Figure 19 As shown, the light-emitting device 200 includes a first end face, and the first end face is provided with a connecting pin 250 protruding from the first end face. Figure 20 As shown, the laser source device 10 also includes a circuit board 400 and a heat sink 500. The circuit board 400 is electrically connected to the connecting pin 250 and fixed to the housing 100. The heat sink 500 is thermally connected to the side of the circuit board 400 away from the housing 100. The heat sink 500 can dissipate the heat generated by the light-emitting device 200 and the circuit board 400 during operation into the environment in a timely manner to ensure the stable operation of the laser source device.

[0145] like Figure 9 As shown, a third threaded connector 140 is provided on the housing 100 for connection and fixation with the circuit board 400. Figure 19 As shown, the circuit board 400 is also provided with a second fixing hole 401, and a fourth threaded connector (not shown in the figure) passes through the second fixing hole 401 and is threadedly connected to the third threaded connector 140.

[0146] like Figure 19As shown, the circuit board 400 is provided with a first electrical connection terminal 410 and a second electrical connection terminal 420. The first electrical connection terminal 410 is electrically connected to the connection pin 250 of the light-emitting device 200, and the second electrical connection terminal 420 is used for electrical connection with the motherboard of the projection device. In a specific implementation, the first electrical connection terminal 410 can be a solder pad, the second electrical connection terminal 420 can be a socket, and the motherboard is provided with a plug for mating with the socket.

[0147] During use, the switching between high and low voltage levels of the light-emitting device 200 can cause vibration at its functional connection points, resulting in noise and affecting the user experience. These functional connection points can be the connection between the circuit board 400 and the housing 100, and the connection between the circuit board 400 and the heat sink 500.

[0148] To mitigate vibration and reduce noise, in some embodiments, an elastic element 601 is provided between the circuit board 400 and the housing 100 to buffer the force between the circuit board 400 and the housing 100.

[0149] And / or, an elastic heat-conducting element 602 is provided between the circuit board 400 and the heat sink 500 to buffer the force between the circuit board 400 and the housing 100 while realizing heat exchange between the circuit board 400 and the heat sink 500.

[0150] In practice, both the elastic element 601 and the elastic heat-conducting element 602 can be foam.

[0151] In one implementation, the laser source device 10 provided in this application embodiment is assembled as follows:

[0152] S11. Solder the light-emitting device onto the circuit board;

[0153] S12. Pre-position the sealing ring on the housing;

[0154] S13. Pre-position the light-emitting device on the housing;

[0155] S14. Fix the light-emitting device to the housing with screws. The light-emitting device presses the sealing ring against the housing. The sealing surface of the light-emitting device, the sealing surface of the sealing ring, and the sealing surface of the housing cooperate to achieve a seal.

[0156] S15. Secure the circuit board to the housing with screws;

[0157] S16. After assembling and debugging the remaining parts of the laser light source device, the light-emitting device is electrically connected to the motherboard through the socket on the circuit board.

[0158] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A laser source device, characterized in that, include: The housing includes a first surface; A sealing platform is provided on the first surface, and the sealing platform protrudes from the first surface; Light-emitting devices, including: Cover plate; and The base is connected to and fixed to the cover plate and the housing; and A sealing ring is fixed between the housing and the light-emitting device; the sealing ring includes: Main body; the main body includes: The first plane is in sealing contact with the sealing platform; The second plane is in sealing contact with the cover plate; and An aperture opening extends through the main body along the alignment direction of the first and second planes, allowing the light beam emitted from the light-emitting device to pass through; and Two protrusions are disposed on opposite sides of the main body along a first direction and cooperate with the first plane to form a limiting groove; the limiting groove is interlocked with the sealing platform.

2. The laser source device according to claim 1, characterized in that, A first positioning component is provided between the housing and the sealing ring; The first positioning component includes: A first positioning protrusion is disposed on the side of the housing facing the sealing ring; and A first positioning hole is provided in the main body and is inserted into and engaged with the first positioning protrusion.

3. The laser source device according to claim 2, characterized in that, There are two first positioning components, and the two first positioning components are arranged along a second direction; the second direction intersects the first direction.

4. The laser source device according to claim 1, characterized in that, The laser source device includes a plurality of light-emitting devices, and the sealing ring is located between the housing and the plurality of light-emitting devices; The main body includes multiple aperture openings, each aperture opening allowing only one light beam emitted from the light-emitting device to pass through; The main body includes a partition located between two adjacent aperture openings; the partition includes: The third plane is located on the surface of the partition portion opposite to the housing, and the third plane is flush with the first plane.

5. The laser source device according to claim 4, characterized in that, A sealing rib is provided on the third plane, and the sealing rib protrudes from the third plane; the sealing rib is in sealed contact with the cover plates of the two adjacent light-emitting devices.

6. The laser source device according to any one of claims 1-5, characterized in that, A fixing component is provided between the housing and the base; The fixing component includes: A first threaded connector is disposed on the side of the housing facing the base; and The second threaded connector passes through the base and is threadedly connected to the first threaded connector.

7. The laser source device according to claim 6, characterized in that, A second positioning component is disposed between the housing and the base; the second positioning component includes: A second positioning protrusion is provided on the side of the housing facing the base; and The second positioning hole is provided on the base and is inserted into and engaged with the second positioning protrusion.

8. The laser source device according to any one of claims 1-5, characterized in that, The light-emitting device includes a first end face, and the first end face is provided with a connecting pin protruding from the first end face; The laser source device also includes: A circuit board, which is electrically connected to the connecting pins and fixed to the housing; and A heat sink is thermally connected to the side of the circuit board away from the housing.

9. The laser source device according to claim 8, characterized in that, An elastic element is provided between the circuit board and the housing; And / or, a flexible thermal conductive element is provided between the circuit board and the heat sink.

10. A projection device, characterized in that, include: A laser source device, wherein the laser source device is the laser source device as described in any one of claims 1-9; An illumination optical path, located on the light-emitting side of the laser source device, is used to modulate the light beam emitted from the laser source device; and A projection lens, located on the light-emitting side of the illumination optical path, is used to image the modulated light beam.

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