A laser light source and laser projection device

Abstract

This application provides a laser light source and a laser projection device, including a laser and a housing with a laser mounting port, wherein the laser is disposed within the laser mounting port; the laser includes a base and a substrate, the base fixedly supporting one side of the substrate, and the other side of the substrate having a light-emitting chip, serving as the light-emitting surface of the substrate; the laser is fixedly connected to the housing via the base; the laser light source also includes a sealing component, the sealing component including a top and a side; the top covers the light-emitting surface of the substrate, and the side surrounds the circumference of the base, the side being press-fitted with the laser mounting port. The laser light source and laser projection device provided by this application solve the problem of direct sealing between the laser and the housing, achieving a good sealing effect between the laser and the housing, preventing dust from entering the inner cavity of the laser light source from the assembly point between the laser and the housing, and helping to ensure the service life of the laser light source.

Description

[0001] This application is a divisional application of Chinese Invention Application 201910023575.8 (2019-1-10), entitled "A Laser Light Source and a Laser Projection Device". Technical Field

[0002] This application relates to the field of laser display equipment technology, and in particular to a laser light source and a laser projection device. Background Technology

[0003] The laser light source is the light source module of a laser display device and one of its core components. Typically, a laser light source includes a laser and a housing for mounting optical components. Figure 1 This is a schematic diagram of an existing laser light source. Figure 1 As shown, the laser source includes a laser 01 and a housing 02; the housing 02 has a laser mounting port, the laser 01 is embedded in the laser mounting port and fixedly connected to the housing 02; the optical components are installed in the cavity of the housing 02.

[0004] To improve the sealing performance between the laser 01 and the housing 02, and to prevent dust from entering the laser source cavity through the mating gap between the laser 01 and the housing 02, a sealing element 03 is often installed at the mating point between the laser 01 and the housing 02. (See attached image) Figure 2 This is a schematic diagram of the sealed assembly structure of a laser source. (See attached diagram) Figure 2 As shown, the structure of the seal 03 is a ring-shaped structure with a protrusion on the inner side. The protrusion on the inner side of the seal 03 is engaged in the groove on the side of the laser 01. The outer side of the seal 03 is in contact with the outer shell 02. The seal 03 and the outer shell 02 are interference fit. The seal 03 is deformed by the pressure of the outer shell 02, thereby forming a mutual seal between the laser 01, the outer shell 02 and the seal 03.

[0005] However, because the groove on the side of the laser 01 is relatively narrow, typically only about 1mm, tools are needed to assemble the seal 03 into the groove, making the assembly of the seal 03 complex and time-consuming. Furthermore, during the assembly process of the laser 01, housing 02, and seal 03, it was found that when the laser 01 with the seal 03 assembled is attached to the housing 02, the seal 03 is easily detached from the groove on the side of the laser 01 due to the pressure from the housing 02. This results in uneven contact between the seal 03 and the laser 01 and housing 02, leading to poor sealing between the laser 01 and housing 02. This allows dust from the air to enter the cavity of the housing 02, reducing the lifespan of the laser source. Summary of the Invention

[0006] This application provides a laser light source and a laser projection device, which solves the problem of sealing between the laser and the housing for a period of time, preventing dust from entering the inner cavity of the laser light source from the assembly point between the laser and the housing, and helping to ensure the service life of the laser light source.

[0007] In a first aspect, this application provides a laser light source, including a laser and a housing with a laser mounting port, wherein the laser is disposed within the laser mounting port; the laser includes a base and a substrate, the base fixedly supporting one side of the substrate, and the other side of the substrate is provided with a light-emitting chip, which is the light-emitting surface of the substrate; the laser is fixedly connected to the housing through the base.

[0008] The laser source also includes a seal, which comprises a top and a side;

[0009] The top covers the light-emitting surface of the substrate, the side wraps around the base, and the side is interference-fitted with the laser mounting port.

[0010] Secondly, this application provides a laser projection device, which includes a light source, a light modulation device, and a lens, wherein the light source is the laser light source described above.

[0011] In the laser source and laser projection device provided in this application embodiment, the laser source includes a laser, a housing, and a sealing element. The sealing element is sleeved on the laser, and the side portion of the sealing element is pressed and fitted against the side of the laser and the side of the laser mounting port provided on the housing, respectively. The sealing element is used to seal the gap between the laser and the housing. More specifically, in this application, the sealing element includes a top and a side portion. The top covers the light-emitting surface of the substrate, and the side portion wraps around the base and is interference-fitted with the laser mounting port. Thus, the inner side of the side portion is pressed and fitted against the side of the base of the laser, and the outer side portion is pressed and fitted against the side of the laser mounting port. In practical applications, the top and side seals can be directly fitted onto the laser without the need for tools, facilitating assembly and installation. The top of the seal covers the light-emitting surface of the substrate, providing initial sealing and allowing the laser substrate to support the seal. This increases the support area of ​​the laser on the seal, effectively preventing displacement during assembly due to the squeezing action of the outer shell. It ensures uniform contact between the sides of the seal and the laser and outer shell, achieving a good seal between them, preventing dust from entering the laser source's internal cavity, and thus extending the lifespan of the laser source. Attached Figure Description

[0012] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a laser source in the prior art;

[0014] Figure 2 This is a schematic diagram of a laser source sealing assembly structure in the prior art;

[0015] Figure 3 An exploded view of a laser source provided in an embodiment of this application;

[0016] Figure 4 This is a schematic diagram of the structure of a laser provided in an embodiment of this application;

[0017] Figure 5 This is a schematic diagram of the structure of the sealing element provided in the embodiments of this application;

[0018] Figure 6 An assembly drawing of the laser and seal provided for an embodiment of this application;

[0019] Figure 7 A cross-sectional view of a laser source provided in an embodiment of this application;

[0020] Figure 8 A partial enlarged view of a laser source provided in an embodiment of this application;

[0021] Figure 9 This is a schematic diagram of the structure of a laser projection device provided in an embodiment of this application.

[0022] in:

[0023] 1-Laser, 101-Base, 102-Substrate, 103-Compound eye lens, 2-Housing shell, 201-Laser mounting port, 202-Second guide ramp, 203-Pressure angle, 3-Sealing element, 301-Side, 302-Top, 303-First guide ramp, 304-Reinforcing angle, 305-First pair of sidewalls, 306-Second pair of sidewalls, 900-Laser projection equipment, 901-Laser light source, 902-Light modulation device, 903-Lens, 904-Projection medium. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] Appendix Figure 3 A schematic diagram of the structure of a laser source provided in an embodiment of this application. (See attached diagram) Figure 3 As shown, the laser source provided in this embodiment includes a laser 1, a housing 2, and a sealing assembly 3.

[0026] Appendix Figure 4 A schematic diagram of the structure of laser 1 provided in an embodiment of this application is attached. Figure 4 As shown, the laser 1 includes a base 101 and a substrate 102. The base 101 is fixedly supported and connected to one side of the substrate 102. A light-emitting chip is disposed on the other side of the substrate 102. The side of the substrate 102 on which the light-emitting chip is disposed is the light-emitting surface of the substrate 102. The laser 1 is fixedly connected to the outer shell 2 through the base 101.

[0027] Furthermore, the laser 1 also includes a compound eye lens 103, which covers the light-emitting surface of the light-emitting chip. The compound eye lens 103 is fixedly connected to the substrate 102. In addition to the plane occupied by the compound eye lens 103, the light-emitting surface of the substrate 102 also has a certain amount of empty surface.

[0028] In this embodiment, a laser mounting port 201 is provided on the outer shell 2 for mounting the laser 1. Specifically, the laser 1 is fitted inside the laser mounting port 201, with the light emission direction of the laser 1 facing the cavity of the outer shell 2. For example, the base 101 is provided with mounting holes and limiting holes, through which the laser 1 and the outer shell 2 are fixedly connected, thus fixing the laser 1 inside the laser mounting port 201. The inner contour of the laser mounting port 201 and the outer contour of the laser 1 are similar polygons. For example, in this embodiment, the outer contours of the base 101, substrate 102, and compound eye lens 103 are approximately rectangular, and the inner contour of the laser mounting port 201 is also approximately rectangular.

[0029] A sealing element 3 is fitted onto the laser 1 and positioned at the mating point between the laser 1 and the housing 2. The sealing element 3 is press-fitted into both the laser 1 and the housing 2. The sealing element 3 is used for an interference fit between the laser 1 and the housing 2, ensuring a tight fit between the laser 1, the housing 2, and the sealing element 3. This seals the space between the laser 1 and the housing 2, preventing dust from entering the inner cavity of the housing 2 through the gap between them, thus sealing the laser projection cavity.

[0030] Appendix Figure 5 This is a schematic diagram of the structure of the seal 3 provided in the embodiments of this application, with attached... Figure 6 This is a schematic diagram of the assembly structure of laser 1 and seal 3, attached. Figure 7 A cross-sectional view of a laser source provided in an embodiment of this application. (See attached image.) Figure 5-7 As shown, the sealing member 3 provided in this embodiment includes a side portion 301 and a top portion 302, with the top portion 302 disposed at the top edge of the side portion 301. After the laser source is assembled, the sealing member 3 is interference-fitted into the laser mounting port 201 of the laser 1 and the housing 2. Specifically, the top portion 302 covers the light-emitting surface of the substrate 102, the side portion 301 wraps around the base 101, and the side portion 301 is interference-fitted with the laser mounting port 201.

[0031] Furthermore, the side edges of the top 302 surround the compound eye lens 103; the inner surfaces of the side 301 are pressed and fitted against the sides of the base 101 and the substrate 102, respectively, and the outer surfaces of the side 301 are pressed and fitted against the sides of the laser mounting port 201, respectively; the inner surface of the top 302 is fitted against the top surface of the substrate 102. Thus, in this embodiment, the sealing member 3 makes full use of the empty surface of the substrate 102, improving the sealing effect between the laser 1 and the housing 2.

[0032] In the specific assembly process of the laser source provided in this application embodiment, the sealing member 3 is first sleeved on the laser 1, the top 302 covers the light-emitting surface of the substrate 102, the inner surface of the top 302 is attached to the top surface of the substrate 102, and the inner side surface of the side 301 is pressed and attached to the side surface of the base 101 and the substrate 102 respectively; then the laser 1 with the sealing member 3 sleeved is placed in the laser mounting port 201 of the housing 2, so that the outer side surface of the side 301 is pressed and attached to the side surface of the laser mounting port 201 respectively, fixing the laser 1 and the housing 2, and the sealing member 3 seals the gap between the laser 1 and the housing 2.

[0033] In this embodiment, the sealing element 3 can be directly fitted onto the laser 1, facilitating rapid positioning of the sealing element 3, improving installation progress, and ensuring sealing performance to a certain extent. Furthermore, when assembling the sealing element 3 with the laser 1, it is directly fitted onto the light-emitting surface of the laser 1's substrate 102. Since there are no obstructions and no auxiliary tools are required, assembly is straightforward, facilitating the installation of the sealing element 3. Compared to existing sealing elements, the sealing element 3 provided in this embodiment is easier to install and provides a more reliable sealing effect.

[0034] In this embodiment, the seal 3 is made of an extrusion-deformable material, such as silicone or rubber. In this embodiment, a rubber seal is preferred. In addition to good elasticity, the rubber seal also has a certain degree of hardness, which facilitates good toughness during use and effectively prevents excessive deformation during installation.

[0035] In the laser source provided in this embodiment, the top 302 covers the light-emitting surface of the substrate 102, providing a preliminary sealing effect. Simultaneously, the laser 1 can provide support to the sealing element 3 through the top 302, similar to the support of the substrate 102. Thus, using the laser's substrate 102 to support the sealing element 3 effectively prevents displacement of the sealing element 3 due to the squeezing action of the outer shell 2 during assembly, ensuring uniform contact between the sealing element 3 and the laser 1 and the outer shell 2. The inner surfaces of the side portion 301 are pressed and adhered to the sides of the base 101 and the substrate 102, respectively, while the outer surfaces of the side portion 301 are pressed and adhered to the sides of the laser mounting port 201, increasing the contact area between the sealing element 3 and the laser 1 and the outer shell 2. This increases the frictional force between the sealing element 3 and the laser 1 and the outer shell 2 to a certain extent during assembly, preventing displacement of the sealing element 3 and further ensuring uniform contact between the sealing element 3 and the laser 1 and the outer shell 2. Thus, the sealing element 3 provided in this embodiment of the application achieves a good sealing effect between the laser 1 and the housing 2, ensuring the sealing between the laser 1 and the housing 2 in the laser source, preventing dust from entering the inner cavity of the laser source, and thus ensuring the service life of the laser source.

[0036] In this embodiment, the side portion 301 of the seal 3 needs to have an interference fit of 0.1-0.8 mm after assembly. This 0.1-0.8 mm interference fit ensures both the sealing effect of the seal 3 and facilitates assembly and installation. In a specific embodiment of this application, the seal 3 preferably has an interference fit of 0.3 mm after assembly. Thus, based on the interference fit, the thickness of the side portion 301 is selected in conjunction with the gap between the laser 1 and the housing 2. For example, when the gap between the laser 1 and the housing 2 is 2 mm, the thickness of the side portion 301 can be selected as 2.3 mm.

[0037] In this embodiment, to ensure that the top 302 of the seal 3 has good support strength, the thickness of the top 302 is 0.5-5mm. Preferably, the thickness of the top 302 is 2mm. A 2mm thickness of the top 302 facilitates good molding compression of the seal 3, which can both ensure the required support strength of the seal 3 and reduce the waste of the thickness of the top 302.

[0038] Furthermore, in the embodiments of this application, as shown in the appendix Figure 5 , 6As shown in Figure 8, a first guide slope 303 is provided at the connection between the top 302 and the side 301, and the first guide slope 303 is inclined from the top 302 to the side 301. When the laser 1 with the sealing element 3 is assembled with the housing 2, the first guide slope 303 has a guiding function and helps to prevent premature compression deformation of the sealing element 3 during the assembly process. Therefore, the first guide slope 303 is provided on the top of the sealing element 3, which not only facilitates the assembly of the housing 2, but also largely prevents premature compression deformation of the sealing element 3, thus ensuring the uniformity of the compression force on the sealing element 3.

[0039] Furthermore, in the embodiments of this application, as shown in the appendix Figure 7 As shown, a second guide slope 202 is provided at the top of the laser mounting port 201. The second guide slope 202 is inclined along the side of the laser mounting port 201 toward the bottom surface of the housing 2. The second guide slope 202 helps to enlarge the end size of the laser mounting port 201 to a certain extent and has a guiding function, which facilitates the installation of the laser and avoids premature deformation of the seal 3 during assembly.

[0040] In a specific embodiment of this application, the laser source includes a first guide slope 303 and a second guide slope 202. When the laser 1 with the sealing element 3 is assembled with the housing 2, the second guide slope 202 first cooperates with the first guide slope 303, which has a dual guiding function and can initially position the laser 1 and the housing 2, further facilitating the assembly of the housing 2 and avoiding premature deformation of the sealing element 3 during the assembly process, thus ensuring the uniformity of the pressure on the sealing element 3.

[0041] In this embodiment, the side portion 301 can cover the groove on the side of the laser 1, and a protrusion can also be provided on the inner wall of the side portion 301 to fill the groove on the side of the laser 1. The protrusion filling the groove on the side of the laser 1 can position the seal 3 during assembly, which helps to improve the sealing effect of the seal 3 on the laser 1 and the housing 2.

[0042] In this embodiment, the top 302 of the sealing member 3 includes a reinforcing angle 304, which is located at the corner of the top 302. In this embodiment, the four corners of the substrate 102 on which the compound eye lens 103 is mounted are left blank, so that the inner side of the reinforcing angle 304 is pressed and fitted against the blank corners of the substrate 102. (See attached...) Figure 5As shown, reinforcing angles 304 are provided at all four corners of the top 302. The reinforcing angles 304 help increase the support strength of the laser 1 for the seal 3, further preventing displacement of the seal 3 during assembly and use, and further ensuring uniform contact between the seal 3 and the laser 1 and the housing 2. Furthermore, placing the reinforcing angles 304 at the corners of the top 302 effectively ensures a full fit between the seal 3 and the laser 1.

[0043] Furthermore, in this embodiment, a pressure angle 203 is provided inside the laser mounting port 201. The pressure angle 203 is located at the corner of the laser mounting port 201, and the top surface of the pressure angle 203 is pressed and fitted against the outer surface of the reinforcing angle 304, that is, the pressure angle 203 and the reinforcing angle 304 cooperate. After the laser source is assembled, the pressure angle 203 presses against the reinforcing angle 304, which more effectively prevents the top 302 from opening up due to the deformation of the seal 3, making it unable to fit against the substrate 102, thereby causing poor sealing between the laser 1 and the housing 2.

[0044] In this embodiment, the outer contour of the side portion 301 of the seal 3 is similar to the outer contour of the laser 1 in a polymorphic manner. For example, the outer contour of the seal 3 is rectangular, that is, the side portion 301 of the seal 3 includes two pairs of parallel sidewalls. For ease of description, these two pairs of parallel sidewalls are referred to as the first pair of sidewalls 305 and the second pair of sidewalls 306, respectively. Typically, the first pair of sidewalls 305 are attached to the width direction of the laser 1, and the second pair of sidewalls 306 are attached to the length direction of the laser 1.

[0045] In this embodiment, the bottom ends of the first pair of sidewalls 305 contact the upper surface of the base 101. During assembly, when the housing 2 compresses the seal 3, the base 101 can support the seal 3 by supporting the first pair of sidewalls 305, which helps to prevent the seal 3 from shifting due to the compression of the housing 2.

[0046] As attached Figure 4 As shown, the laser 1 provided in this embodiment also includes connection pins for circuit connection of the laser 1. To prevent the sealing element 3 from affecting the use of the connection pins on the laser 1, the height of the second pair of sidewalls 306 is usually smaller than the height of the first pair of sidewalls 305. In this embodiment, a groove is formed in the middle of the second pair of sidewalls 306, and the two ends of the second pair of sidewalls 306 are flush with the first pair of sidewalls 305, that is, the height of the middle of the second pair of sidewalls 306 is smaller than the height of the two ends of the second pair of sidewalls 306. In this way, compared with the uniformly flush structure of the second pair of sidewalls 306, the fit with the base 101 of the laser 1 is tighter, which is more conducive to ensuring a good sealing effect between the laser 1 and the outer shell 2 while meeting the specific structure of the laser 1.

[0047] Based on the laser light source provided in the embodiments of this application, the embodiments of this application also provide a laser projection device. (Appendix) Figure 9 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application. Figure 9 As shown, the laser projection device 900 provided in this embodiment includes a laser light source 901, a light modulation device 902, and a lens 903. The laser light source 901 provides illumination to the light modulation device 902. The light modulation device 902 modulates the light beam emitted by the laser light source 901 and outputs it to the lens 903 for imaging, projecting it onto a projection medium 904 to form a projected image. The laser light source 901 is the laser light source described in the above embodiment. For the specific structure of the laser light source 901, please refer to the detailed description of the above embodiment, which will not be repeated here.

[0048] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on its differences from other embodiments; relevant parts can be referred to the description of the method embodiments. It should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Other embodiments of the invention will be readily apparent to those skilled in the art upon consideration of the specification and practice of the invention herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not invented by the invention. The specification and embodiments are to be considered exemplary only; the true scope and spirit of the invention are indicated by the following claims.

[0049] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A laser source, comprising a laser and a housing having a laser mounting port, wherein the laser is disposed within the laser mounting port; characterized in that, The laser includes a base and a substrate. The base fixes and supports one side of the substrate. The other side of the substrate is provided with a light-emitting chip, which is the light-emitting surface of the substrate. The laser is fixedly connected to the housing through the base, and the light-emitting direction of the laser is towards the cavity of the housing. The laser source also includes a sealing element, which includes a top and a side; the top is disposed at the top edge of the side. The top covers the light-emitting surface of the substrate, the side wraps around the base, and the side is interference-fitted with the laser mounting port; Wherein, the inner side surface of the side portion is pressed and bonded to the side surface of the base and the substrate respectively, and the outer side surface of the side portion is pressed and bonded to the side surface of the laser mounting port respectively; A first guide slope is provided on the outside of the connection between the top and the side, and a second guide slope is provided inside the laser mounting port. The first guide slope and the second guide slope are offset from each other.

2. The laser source according to claim 1, characterized in that, The laser also includes a compound eye lens, which covers the light-emitting surface of the light-emitting chip, with the side edge of the top surrounding the compound eye lens.

3. The laser source according to claim 1, characterized in that, The inner surface of the top is attached to the top surface of the substrate, and the thickness of the top is 0.5-5mm.

4. The laser source according to claim 1, characterized in that, The top includes a reinforcing angle located at the corner of the top. The four corners of the substrate are left blank, and the inner side of the reinforcing angle is pressed and bonded to the blank corners of the substrate.

5. The laser source according to claim 4, characterized in that, A pressure angle is provided inside the laser mounting port, and the pressure angle is pressed and fitted against the reinforcing angle.

6. The laser source according to claim 1, characterized in that, The side portion includes a first pair of sidewalls, the bottom ends of which contact the upper surface of the base.

7. The laser source according to claim 3, characterized in that, The side portion also includes a second pair of sidewalls, and the laser includes connection pins. A slot is formed in the middle of the second pair of sidewalls to avoid the connection pins.

8. The laser source according to claim 1, characterized in that, The sealing element is made of rubber or silicone.

9. A laser projection device, characterized in that, The laser projection device includes a light source, a light modulation device, and a lens, wherein the light source is the laser light source described in any one of claims 1-8.

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