Laser projection light source and laser projection device

Abstract

The application relates to a laser projection light source and a laser projection device. A light spot adjusting mechanism is arranged on a shell. The light spot adjusting mechanism is used for arranging a lens, and can make the lens arranged thereon rotate and adjust positions around a first axis and a second axis of the lens respectively, and the first axis and the second axis are arranged at an angle. The light spot adjusting mechanism is arranged in the laser projection light source, and the rotating and adjusting positions of the lenses in the light combination lens group along the first axis and the second axis can be realized by adjusting the light spot adjusting mechanism. Since the first axis and the second axis are arranged at an angle, and the first axis and the second axis are both arranged at an angle with the central optical axis of the lens, the rotating angles of the lens in two different dimensions arranged at an angle with the central optical axis of the lens can be adjusted, and the central optical axes of at least two lenses can be adjusted to be parallel or even completely coincide, so that the light spot correction effect is achieved, and the light flux and the uniformity are high.

Description

Technical Field

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

[0002] Laser projection equipment comprises a laser projection light source, an optical engine, and a lens. The illumination beam provided by the laser projection light source is modulated by the optical engine to become a projection beam, which is then projected onto a screen or wall by the lens to form a projected image. Luminous flux (brightness) and chromaticity uniformity are two of the most important performance indicators of laser projection equipment, directly impacting its quality, market positioning, and pricing. The laser projection light source, as a crucial component, directly determines the energy utilization efficiency of the entire laser projection equipment, thus affecting the final luminous flux, uniformity, and other performance indicators. Within the laser projection light source, the shape, size, and position of the light spot directly influence the luminous flux and chromaticity uniformity. Summary of the Invention

[0003] Therefore, it is necessary to overcome the shortcomings of the existing technology and provide a laser projection light source and laser projection device that can improve the luminous flux and color uniformity of the laser projection light source.

[0004] A laser projection light source, the laser projection light source comprising:

[0005] The outer casing, which is provided with a window;

[0006] A laser, the laser being mounted at the window of the housing, the laser being configured to emit multiple laser beams toward the interior of the housing;

[0007] A beam adjustment mechanism is installed inside the housing;

[0008] A beam combiner assembly is located on the light-emitting side of the laser. The beam combiner assembly is configured to combine the laser beam emitted by the laser. The beam combiner assembly is installed inside the housing.

[0009] The beam combining lens assembly includes at least two lenses, which are used to combine the laser beam. The at least two lenses are arranged sequentially along the emission direction of the laser beam. At least one lens is correspondingly mounted on a beam adjustment mechanism. The beam adjustment mechanism enables the corresponding lens to rotate and adjust its position around a first axis and a second axis, respectively. The first axis and the second axis are set at an angle, and both the first axis and the second axis are set at an angle to the central optical axis of the lens.

[0010] In one embodiment, there are at least two light spot adjustment mechanisms, and at least two lenses are disposed on at least two light spot adjustment mechanisms in a one-to-one correspondence.

[0011] In one embodiment, the light spot adjustment mechanism includes: a first bracket for mounting the lens; a second bracket rotatably connected to the second bracket about a first axis; a first adjustment component connected to both the first bracket and the second bracket, the first adjustment component being used to adjust the rotation angle of the first bracket relative to the second bracket about the first axis; a support shell rotatably connected to the support shell about a second axis; and a second adjustment component connected to both the support shell and the second bracket, the second adjustment component being used to adjust the rotation angle of the second bracket relative to the support shell about the second axis.

[0012] In one embodiment, the first bracket is provided with first rotating shafts on opposite sides along the first axis, the second bracket is provided with two first limiting grooves, and the laser projection light source further includes two first limiting pressure plates detachably disposed on the second bracket. The two first limiting pressure plates are provided in a one-to-one correspondence with the two first limiting grooves. The first limiting pressure plates and the corresponding first limiting grooves cooperate to form a first shaft hole. The two first rotating shafts are coaxially disposed along the first axis and are rotatably disposed in the two first shaft holes respectively.

[0013] In one embodiment, there are two first adjustment components, which are located on opposite sides of the first axis. The first adjustment component includes: an elastic member, the opposite ends of which abut against the first bracket and the second bracket respectively; and a first adjustment member, which is rotatably inserted through the first bracket. The second bracket is provided with a first adjustment hole corresponding to the position of the first adjustment member. The first adjustment member is disposed in the first adjustment hole. When the first adjustment member rotates, it can adjust the distance between the first bracket and the second bracket.

[0014] In one embodiment, there are two first adjustment components, which are located on opposite sides of the first axis. The first adjustment component includes a plunger spring, and the first bracket is provided with a second adjustment hole corresponding to the plunger spring. The second adjustment hole is a threaded hole adapted to the thread of the plunger spring. The plunger spring is installed in the second adjustment hole, and the elastic pressure head of the plunger spring abuts against the second bracket.

[0015] In one embodiment, the second bracket is provided with second rotating shafts on opposite sides along the second axis, one side of the support shell is provided with a second limiting groove, and the other side of the support shell is provided with a second shaft hole. The laser projection light source also includes a second limiting pressure plate detachably disposed on the support shell. The second limiting pressure plate is correspondingly disposed with the second limiting groove. The second limiting pressure plate and the second limiting groove cooperate to form a third shaft hole. The two second rotating shafts are coaxially disposed along the second axis and are rotatably disposed in the second shaft hole and the third shaft hole, respectively.

[0016] In one embodiment, the support shell includes: two support plates, which are arranged at a distance from each other; a second bracket is rotatably disposed in the space between the two support plates; a second shaft hole is formed in one of the support plates; a step is provided on the side of the other support plate; a second limiting groove is formed on the step; and a second limiting pressure plate is connected to the step; and a connecting plate, through which the two support plates are connected.

[0017] In one embodiment, the support shell is provided with a third adjustment hole, and the second adjustment component includes a locking member. The locking member is disposed on the second bracket and is movably inserted into the third adjustment hole. When the second bracket rotates around the second axis, it can synchronously drive the locking member to move along the third adjustment hole. When the second bracket rotates around the second axis to the target angle position, the locking member locks the second bracket to the support shell.

[0018] A laser projection device, comprising:

[0019] The laser projection light source is configured to emit an illumination beam;

[0020] An optical modulation assembly is configured to modulate the illumination beam to obtain a projection beam; and

[0021] A lens is located on the light-emitting side of the optical modulation assembly, and the lens is configured to project the projection beam to form a projected image.

[0022] The aforementioned laser projection light source and laser projection equipment include a beam adjustment mechanism within the laser projection light source. Lenses are mounted on the beam adjustment mechanism. By adjusting the beam adjustment mechanism, the lenses in the beam combining lens group can be rotated and adjusted around the first axis and the second axis, respectively. Since the first axis and the second axis are set at an angle, and both the first axis and the second axis are set at an angle to the central optical axis of the lens, the rotation angle of the lens can be adjusted in two different dimensions that are set at an angle to its central optical axis. This allows the central optical axes of at least two lenses to be adjusted to be parallel or even completely coincident, thereby achieving the effect of beam correction and ensuring high light flux and uniformity. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a projection system according to one embodiment.

[0024] Figure 2 This is a structural diagram of a laser projection device according to one embodiment.

[0025] Figure 3 This is a schematic diagram of the projection imaging optical path of a laser projection device according to one embodiment.

[0026] Figure 4 This is a schematic diagram of the optical path of a laser projection light source according to one embodiment.

[0027] Figure 5 This is a structural view of a beam adjustment mechanism according to one embodiment.

[0028] Figure 6 for Figure 5 The exploded view of the light spot adjustment mechanism is shown.

[0029] Figure 7 for Figure 5 Another viewpoint structural diagram of the light spot adjustment mechanism shown.

[0030] Figure 8 for Figure 5 Another viewpoint structural diagram of the light spot adjustment mechanism shown.

[0031] Figure 9 for Figure 5 The diagram shows a cross-sectional view of the light spot adjustment mechanism.

[0032] Figure 10 for Figure 9 Enlarged structural diagram at point A.

[0033] Figure 11 for Figure 9 Enlarged structural diagram at point B.

[0034] Figure 12This is an exploded view of the first and second supports in a beam adjustment mechanism according to another embodiment.

[0035] Figure 13 for Figure 12 The diagram shows a cross-sectional view of the first and second brackets assembled together.

[0036] Figure 14 for Figure 13 Enlarged structural diagram at point C.

[0037] 1. Laser projection equipment; 10. Laser projection light source; 110. Laser; 120. Beam combiner assembly; 121. Lens; 130. First convex lens; 140. First reflector; 150. Concave lens; 160. First light homogenizing component; 20. Light modulation assembly; 210. Second light homogenizing device; 220. Second reflector; 230. Second convex lens; 240. Light valve; 250. Prism assembly; 30. Lens; 40. Housing; 50. Spot adjustment mechanism; 51. First bracket; 511. Mounting groove; 512. First clearance opening; 513. First rotating shaft; 514. Second positioning part; 515. Assembly hole; 516. Second adjustment hole; 52. Second bracket; 521. First limiting groove; 522. First limiting pressure plate; 5221. First pressing part; 5 23. First shaft hole; 524. First connecting piece; 525. First adjusting hole; 526. First positioning part; 527. Recess; 528. Second clearance opening; 529. Second rotating shaft; 5291. Rotary adjusting handle; 53. First adjusting assembly; 531. Elastic element; 532. First adjusting piece; 5321. Head; 5322. Rod; 533. Piston spring; 5331. Elastic pressing head; 54. Support shell; 541. Second limiting groove; 542. Second shaft hole; 543. Second limiting pressure plate; 5431. Second pressing part; 544. Third shaft hole; 545. Support plate; 546. Connecting plate; 547. Step; 548. Third adjusting hole; 55. Second adjusting assembly; 551. Locking piece; 56. Second connecting piece; 2. Projection screen. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In laser projection light sources, the shape, size, and position of the light spot directly affect the luminous flux and chromaticity uniformity. Multiple laser beams of different or the same color emitted by the laser are respectively projected onto multiple mirrors in a beam combiner assembly. These multiple mirrors then combine the laser beams into a single beam. The shape of each laser beam illuminating its corresponding mirror matches the theoretical ideal. Furthermore, the optical propagation efficiency of the laser projection light source is highest and the mixing effect is most uniform when the centers of the light spots formed by different laser beams on the mirrors coincide. At this point, the luminous flux (brightness) and chromaticity uniformity are also optimal. In other words, the smaller the positional accuracy tolerance of the beam combiner assembly, the higher the optical utilization efficiency. To ensure optimal system optical efficiency, laser projection equipment designs increasingly smaller positional tolerances for the beam combiner, which places higher demands on the precision of structural components and the difficulty of debugging. However, as described in the background technology, the individual mirrors of the beam combiner assembly are usually directly fixed within their respective mirror slots in the housing. The coaxiality deviation of these mirror slots, for example, is 0.15 to 0.25, which is relatively large and does not meet the requirements. Therefore, post-processing of the housing is necessary to reduce the coaxiality deviation between the two mirror slots, ensuring that the central optical axes of the two optical components are parallel or even coincident. However, post-processing significantly reduces operational efficiency. Another approach involves adding a support bracket for the lenses, rotatably mounted on the housing in a specific direction. Rotating the bracket causes the lenses to rotate synchronously, thereby adjusting the direction of their central optical axes. However, the shape of the laser beams illuminating the corresponding lenses does not match the theoretical shape, and the luminous flux and chromaticity uniformity of the laser projection light source still need improvement.

[0040] Based on the above reasons, this application provides a laser projection light source and a laser projection device, which is a technical solution to improve the luminous flux and color uniformity of the laser projection light source.

[0041] Figure 1 This is a structural diagram of a projection system according to an embodiment. The projection system includes a laser projection device 1 and a projection screen 2.

[0042] Figure 2 This is a structural diagram of a laser projection device 1 according to some embodiments. See also... Figure 2 The laser projection device 1 includes a laser projection light source 10, a light modulation component 20, and a lens 30. The laser projection device 1 may also include a housing 40. Figure 2 Only a portion of the housing 40 is shown in the image.

[0043] The laser projection light source 10 is configured to provide an illumination beam (laser beam). The light modulation assembly 20 is configured to modulate the illumination beam provided by the laser projection light source 10 using an image signal to obtain a projection beam. The lens 30 is configured to project the projection beam onto a screen or wall to form a projected image. The laser projection light source 10, the light modulation assembly 20, and the lens 30 can be assembled in the housing 40. The laser projection light source 10, the light modulation assembly 20, and the lens 30 can be connected sequentially along the beam propagation direction.

[0044] The laser projection light source 10, the light modulation component 20, and the lens 30 can each be enclosed by a corresponding housing 40. The housing 40 corresponding to each of the laser projection light source 10, the light modulation component 20, and the lens 30 can support the corresponding optical components and ensure that each optical component meets certain sealing or airtight requirements.

[0045] One end of the light modulation component 20 is connected to the lens 30, and the light modulation component 20 and the lens 30 are arranged along the emission direction of the projection beam of the laser projection device 1 (e.g., parallel to the N direction). The other end of the light modulation component 20 can be connected to the laser projection light source 10.

[0046] In some embodiments, the arrangement direction of the laser projection light source 10 and the light modulation component 20 is approximately perpendicular to the arrangement direction of the light modulation component 20 and the lens 30. That is, in the laser projection device 1, the emission direction of the projection beam (e.g., parallel to the N direction) is approximately perpendicular to the emission direction of the illumination beam (e.g., parallel to the M direction). This connection structure can adapt to the optical path characteristics of the reflective light valve 240 (described below) in the light modulation component 20, and also helps to shorten the length of the optical path in one direction, thus allowing more space to be arranged for the various components of the laser projection device 1.

[0047] Figure 3 According to the projection imaging optical path schematic diagram of the laser projection device 1 according to some embodiments, the illumination beam emitted by the laser projection light source 10 enters the light modulation component 20.

[0048] Please see Figure 4 , Figure 4 This is a schematic diagram of the optical path of the laser projection light source 10 of a laser projection device 1 according to an embodiment. The laser projection light source 10 includes a laser 110 and a beam combiner assembly 120.

[0049] The laser 110 is configured to emit multiple laser beams. The colors of the multiple laser beams can be the same or different colors, and this is not limited thereto. The number of lasers 110 is not limited to one; for example, there can be two, three, four, or more.

[0050] It should be noted that the laser projection light source 10 also includes a housing, which has a window, and the laser 110 is specifically installed at the window of the housing.

[0051] In some examples, laser 110 is configured as a monochromatic laser, capable of emitting lasers of various wavelengths such as blue, green, or red. The specific wavelengths can be flexibly adjusted and set according to actual needs, and are not limited here. Furthermore, at least two lamp groups of the monochromatic laser are configured, each emitting the same laser color. The brightness of the light spot increases with the number of lamp groups in the monochromatic laser. The laser projection light source 10 also includes a wavelength conversion device for receiving the laser beam emitted by the monochromatic laser and converting it into laser beams of other wavelengths, which, together with the generated laser beams of other wavelengths, are used to form an illumination beam. Optionally, the wavelength conversion device may be, for example, a fluorescent wheel.

[0052] In some examples, laser 110 is not limited to a monochromatic laser; it can also be, for example, a tri-color laser to emit three-color laser beams. This eliminates the need for a wavelength conversion device, and the tri-color laser offers a wide color gamut, high brightness, and provides a high-quality illumination beam. Specifically, the tri-color laser includes three light groups emitting three different wavelength laser beams: a first-band laser beam, a second-band laser beam, and a third-band laser beam, specifically, for example, red, green, and blue. The light groups can be one or more light-emitting chips, one or more LEDs, etc.

[0053] A beam combiner assembly 120 is located on the light-emitting side of the laser 110 and is configured to combine the laser beam emitted by the laser 110. The beam combiner assembly 120 is installed inside the housing. Specifically, the beam combiner assembly 120 includes at least two lenses 121 for combining the laser beam, and the at least two lenses 121 are arranged sequentially along the emission direction of the laser beam.

[0054] Lens 121 is specifically, for example, a reflective lens or a bidirectional lens, etc.

[0055] The laser 110 includes at least two lamp groups, each corresponding to at least two lenses 121. The laser beams emitted by the lamp groups are incident on the corresponding lenses 121, reflected by the lenses 121, and emitted outward, thus achieving the combination of at least two laser beams.

[0056] Based on the aforementioned embodiments, the laser projection light source 10 further includes a converging lens group. The converging lens group is located on the light-emitting side of the beam combining lens group 120, and is configured to converge the laser light after it has been combined by the beam combining lens group 120.

[0057] Specifically, the converging lens group includes a first convex lens 130, a first reflecting mirror 140, and a concave lens 150 arranged sequentially along the exit direction of the beam combining lens group 120. The first convex lens 130 is also referred to as the large telescope; the concave lens 150 is also referred to as the small telescope.

[0058] In some examples, the laser projection light source 10 may also include a first homogenizing device. The first homogenizing device is, for example, a diffuser wheel or a light guide. Located on the light-emitting side of the converging lens assembly, the first homogenizing device is configured to homogenize the laser beam converged by the converging lens assembly, thereby improving the color uniformity of the light spot.

[0059] Please refer to the following: Figure 3 The light modulation assembly 20 includes a second homogenizing device 210, a second reflector 220, a second convex lens 230, a light valve 240, and a prism assembly 250. The light valve 240 is configured to modulate the illumination beam incident upon it into a projection beam according to an image signal, and direct the projection beam toward the lens 30. The second homogenizing device 210 and the light valve 240 are arranged sequentially along the beam propagation direction. The second homogenizing device 210 is configured to homogenize the illumination beam incident upon it before directing it toward the light valve 240.

[0060] In some embodiments, the second homogenizing device 210 is a light guide. This light guide receives the illumination beam provided by the laser projection light source 10 and homogenizes the illumination beam. In some embodiments, the light outlet of the light guide is rectangular. The light guide can shape the light beam spot so that the shape of the light beam spot matches the shape of the light valve 240. In some embodiments, the second homogenizing device 210 can also be a compound eye lens.

[0061] The light valve 240 can be a reflective light valve 240. The light valve 240 includes multiple reflective sheets, each corresponding to a pixel in the projected image. For example, depending on the projected image to be displayed, the reflective sheet of the light valve 240 corresponding to the pixel to be displayed in a bright state can reflect a light beam to the lens 30. The light beam reflected to the lens 30 is called the projection beam. In this way, the light valve 240 can modulate the illumination beam to obtain the projection beam, and use the projection beam to display the image.

[0062] In some embodiments, the light valve 240 is a digital micromirror device (DMD). A DMD includes multiple (e.g., thousands) of tiny reflective mirrors that can be individually driven and rotated. These tiny reflective mirrors can be arranged in an array. Each tiny reflective mirror (e.g., each micromirror) corresponds to a pixel in the projected image to be displayed.

[0063] See also Figure 3In some embodiments, the laser projection device 1 may further include an illumination mirror assembly located between the light valve 240 and the second light homogenizer 210. The illumination mirror assembly includes a second reflector 220, a second convex lens 230, and a prism assembly 250. The light beam homogenized by the second light homogenizer 210 can be directed towards the light valve 240 through the illumination mirror assembly.

[0064] The illumination beam emitted from the second homogenizing device 210 is directed towards the second reflector 220, which reflects the illumination beam to the second convex lens 230. The second convex lens 230 converges the illumination beam into the prism assembly 250, which then reflects the illumination beam into the light valve 240.

[0065] Based on the aforementioned embodiments, the laser projection light source 10 further includes a beam adjustment mechanism 50, which is installed inside the housing. The beam adjustment mechanism 50 is used to mount the lens 121, enabling the lens 121 mounted thereon to rotate and adjust its position around its own first axis and second axis. The first axis and second axis are set at an angle, and both the first axis and second axis are set at an angle to the central optical axis of the lens. Optionally, the angle between the first axis and the second axis includes, but is not limited to, 30° to 120°, specifically, 30°, 45°, 60°, 90°, 120°, 135°, or 150°, etc.

[0066] As can be seen, a beam adjustment mechanism 50 is provided in the laser projection light source 10, and the lens 121 in the beam combining lens group 120 is installed in the beam adjustment mechanism 50. By adjusting the beam adjustment mechanism 50, the lens 121 in the beam combining lens group 120 can be rotated and adjusted around the first axis and the second axis respectively. Since the first axis and the second axis are set at an angle, and both the first axis and the second axis are set at an angle to the central optical axis of the lens, the rotation angle of the lens can be adjusted in two different dimensions that are set at an angle to its central optical axis. In this way, the central optical axes of at least two lenses can be adjusted to be parallel or even completely coincident, thereby playing a role in beam correction and ensuring high light flux and uniformity.

[0067] Specifically, when used for spot adjustment corresponding to three different wavelength laser beams, the centers of the three colors of the spot can be made to coincide, which ensures the uniformity of system light flux and color, while improving work efficiency.

[0068] Specifically, the first axis and the second axis are, for example, axes extending in two different directions passing through the center of the lens 121. Thus, after the spot adjustment mechanism 50 rotates the lens 121 around the first and second axes to adjust its position, the center position of the lens 121 remains unchanged. Especially when the centers of all the lenses 121 are on the same straight line, it facilitates quickly adjusting all the lenses 121 to a coaxial configuration.

[0069] It should be noted that the number of light spot adjustment mechanisms 50 can be one, two, three or more, and the specific number is not limited here. It can be flexibly adjusted and set according to actual needs.

[0070] In one specific embodiment, there are at least two beam adjustment mechanisms 50, and at least two lenses 121 are correspondingly disposed on at least two beam adjustment mechanisms 50. The beam adjustment mechanisms 50 allow the corresponding lenses 121 to rotate and adjust their positions along the first axis and the second axis, respectively. Thus, the shapes of each laser beam incident on the corresponding lens 121 are consistent with the theoretical shape. Furthermore, when the centers of the beam spots formed by different laser beams on the lens 121 coincide, the optical propagation efficiency of the laser projection light source 10 is the highest, the mixing effect is the most uniform, and the luminous flux and chromaticity uniformity are also optimal. This enables the synthesis of multiple laser beams into a single beam.

[0071] As an optional solution, the number of light spot adjustment mechanisms 50 can be less than the number of lenses 121. See also... Figure 4 For example, there are three lenses 121 and two spot adjustment mechanisms 50. Two lenses 121 are respectively mounted on two spot adjustment mechanisms 50, and the other lens 121 does not need to be mounted on the spot adjustment mechanism 50, and can be fixedly mounted on the housing, for example.

[0072] Of course, as an optional solution, the beam adjustment mechanism 50 can also be a single unit, and the lens 121 can be two units, for example. One lens 121 is mounted in the beam adjustment mechanism 50, and the other lens 121 is fixedly mounted inside the housing. The beam adjustment mechanism 50 rotates and adjusts the position of one of the lenses 121 along the first axis and the second axis, thereby making the central optical axes of the two lenses 121 parallel or coincident. In this way, the shape of each laser beam incident on the corresponding lens 121 can also be made consistent with the theoretical shape, thereby improving the light flux and uniformity.

[0073] Please see Figures 5 to 8 Based on the aforementioned embodiments, the light spot adjustment mechanism 50 includes: a first bracket 51, a second bracket 52, a first adjustment component 53, a support shell 54, and a second adjustment component 55.

[0074] The first bracket 51 is used to mount the lens 121. Optionally, the mounting method of the lens 121 on the first bracket 51 includes, but is not limited to, adhesive bonding, spring clip fixing, or other fixing methods, and is not limited here. It can be set according to actual needs. In addition, the first bracket 51 can be configured as a mounting plate, with a mounting groove 511, and the lens 121 is mounted inside the mounting groove 511. In this way, the mounting groove 511 can adjust the height of the lens 121, which can facilitate the rotation of the first bracket 51 around the first axis. In addition, the bottom wall of the mounting groove 511 has a first clearance opening 512, which can avoid the laser beam and prevent the laser beam entering the lens 121 from being blocked.

[0075] The first bracket 51 is rotatably connected to the second bracket 52 about a first axis. Both the first bracket 51 and the second bracket 52 are connected to the first adjustment component 53, which is used to adjust the rotation angle of the first bracket 51 relative to the second bracket about the first axis.

[0076] The second bracket 52 is rotatably connected to the support shell 54 about the second axis.

[0077] Optionally, the support shell 54 is not limited to mounting the second bracket 52, the first bracket 51 and the lens 121, but can also be used to mount other optical devices, which will not be described in detail here.

[0078] Both the support shell 54 and the second bracket 52 are connected to the second adjustment component 55, which is used to adjust the rotation angle of the second bracket 52 relative to the support shell 54 around the second axis.

[0079] Thus, the first adjustment component 53 can adjust the rotation angle of the first support 51 around the first axis, thereby adjusting the rotation angle of the lens 121 mounted on the first support 51 around the first axis. Furthermore, the second adjustment component 55 can adjust the rotation angle of the second support 52 around the second axis, thereby adjusting the rotation angle of the lens 121 mounted on the first support 51 around the second axis. This allows for stepless rotation adjustment of the lens 121 around the first and second axes, enabling rapid parallelism or even overlap of the central optical axes of each lens 121, making the adjustment operation convenient and quick.

[0080] It should be noted that the first axis is, for example, as shown in the example below. Figure 5 As shown by the double arrow x in the image, the second direction is, for example... Figure 5 The double arrow y in the diagram is shown.

[0081] It should be noted that there are many ways to rotate the first bracket 51 to the second bracket 52. For example, the first bracket 51 may have a rotating shaft and the second bracket 52 may have a corresponding shaft hole; the second bracket 52 may have a rotating shaft and the first bracket 51 may have a corresponding shaft hole; or the first bracket 51 may be rotated without a shaft. As long as the first bracket 51 is rotatably mounted on the second bracket 52 around its first axis, it is acceptable.

[0082] Please see Figure 5 , Figure 6 and Figure 8 In one specific embodiment, the first bracket 51 is provided with first rotating shafts 513 on opposite sides along the first axis, and the second bracket 52 is provided with two first limiting grooves 521. The laser projection light source 10 also includes two first limiting pressure plates 522 detachably disposed on the second bracket 52. The two first limiting pressure plates 522 are disposed one-to-one with the two first limiting grooves 521, and the first limiting pressure plates 522 and the corresponding first limiting grooves 521 cooperate to form first shaft holes 523. The two first rotating shafts 513 are coaxially disposed along the first axis and are rotatably disposed in the two first shaft holes 523 respectively. Thus, in the step of assembling the first bracket 51 to the second bracket 52, the two first rotating shafts 513 of the first bracket 51 are first placed in the two first limiting grooves 521 respectively; then the two first limiting pressure plates 522 are connected to the first bracket 51, and the first limiting pressure plates 522 and the corresponding first limiting grooves 521 cooperate to form first shaft holes 523 for mounting the first rotating shafts 513. The first limiting plate 522 serves as a limiting device, preventing the first rotating shaft 513 from disengaging from the first limiting groove 521. The first bracket 51 can be easily and rotatably mounted on the second bracket 52, and can drive the lens 121 to rotate around the first axis.

[0083] Specifically, the first limiting groove 521 is an arc-shaped groove, which conforms to the shape of the outer wall of the first rotating shaft 513, allowing the first rotating shaft 513 to rotate flexibly within the first limiting groove 521. Furthermore, the first limiting pressure plate 522 presses against the side of the first rotating shaft 513 opposite to the bottom wall of the arc-shaped groove. The first limiting pressure plate 522 has an arc-shaped first pressing part 5221, which conforms to the shape of the outer wall of the first rotating shaft 513, resulting in a circular axial cross-sectional profile of the first shaft hole 523.

[0084] Optionally, the first limiting pressure plate 522 is connected to the second bracket 52 via one or more first connectors 524. The first connectors 524 include, but are not limited to, screws, pins, rivets, or snap-fit ​​components. In this embodiment, the opposite ends of the first limiting pressure plate 522 are respectively fixedly mounted to the second bracket 52 via the first connectors 524.

[0085] Please see Figures 9 to 11 In some embodiments, the first bracket 51 and the second bracket 52 are fitted with a clearance. This provides a space between the first bracket 51 and the second bracket 52 for adjusting the angle of rotation of the first bracket 51 around the first axis. The size of this clearance space can be adjusted and set according to actual needs, as long as it allows the first bracket 51 to adjust its rotation angle around the first axis within a preset angle range. Furthermore, the clearance space between the first bracket 51 and the second bracket 52 prevents the adjustment angle of the first bracket 51 around the first axis from exceeding the preset angle, thus ensuring high installation stability of the second bracket 52.

[0086] Please see Figure 6 , Figure 9 and Figure 11 In one embodiment, two first adjustment components 53 are provided, located on opposite sides of the first axis. Each first adjustment component 53 includes an elastic element 531 and a first adjustment element 532. The opposite ends of the elastic element 531 abut against the first support 51 and the second support 52, respectively. The first adjustment element 532 is rotatably inserted through the first support 51. The second support 52 has a first adjustment hole 525 corresponding to the position of the first adjustment element 532. The first adjustment element 532 is disposed in the first adjustment hole 525, and its rotation adjusts the distance between the first support 51 and the second support 52.

[0087] Specifically, the first adjusting member 532 includes a head 5321 and a rod 5322 connected to the head 5321. The head 5321 abuts against the side of the first support 51 opposite to the second support 52, and the rod 5322 is inserted into the first adjusting hole 525. The first adjusting hole 525 is a threaded hole, and the rod 5322 has a thread adapted to the first adjusting hole 525. In this way, any one of the first adjusting components 53 can be operated according to actual needs to complete the stepless rotation adjustment angle of the lens 121 around the first axis.

[0088] Specifically, two first adjustment components 53 are located at opposite ends of the first bracket 51. When the first adjustment member 532 in the first adjustment component 53 at the first end rotates, the first adjustment member 532 can correspondingly adjust the distance between the first end of the first bracket 51 and the second bracket 52. The distance between the second end of the first bracket 51 and the second bracket 52 is adaptively adjusted under the action of the elastic member 531. Conversely, when the first adjustment member 532 in the first adjustment component 53 at the second end rotates, the first adjustment member 532 can correspondingly adjust the distance between the second end of the first bracket 51 and the second bracket 52. The distance between the first end of the first bracket 51 and the second bracket 52 is adaptively adjusted under the action of the elastic member 531. After the first bracket 51 is adjusted, it remains stationary under the rebound force of the elastic member 531, thereby realizing the rotation adjustment of the first bracket 51 around the first axis.

[0089] Based on the foregoing embodiments, the elastic element 531 may include, but is not limited to, a spring or an elastic block. In this embodiment, the elastic element 531 is a spring, and the first adjusting element 532 passes through the spring.

[0090] Please see Figure 6 and Figure 11 Optionally, the second bracket 52 is provided with a first positioning part 526, and one end of the spring is positioned in the first positioning part 526. Specifically, the first positioning part 526 is, for example, a positioning post, and one end of the spring is sleeved on the first positioning part 526. Further, a first adjusting hole 525 is formed in the positioning post. In this way, one end of the spring is positioned by the first positioning part 526, resulting in higher stability.

[0091] Furthermore, the first bracket 51 has a second positioning part 514 on the side facing the second bracket 52, and the other end of the spring is positioned in the second positioning part 514. Optionally, the second positioning part 514 is specifically, for example, a positioning groove, and the other end of the spring is located inside the positioning groove. In this way, the other end of the spring is positioned by the second positioning part 514, resulting in high stability.

[0092] Optionally, the first adjusting element 532 may include, but is not limited to, a screw, bolt, or threaded rod, etc.

[0093] Optionally, the first bracket 51 is provided with a mounting hole 515, which is a through hole, and the first adjusting member 532 is rotatably inserted through the mounting hole 515. Specifically, the mounting hole 515 is a countersunk hole, and the head 5321 of the first adjusting member 532 is received in the countersunk hole.

[0094] Please see Figures 12 to 14In another embodiment, two first adjustment components 53 are provided, located on opposite sides of the first axis. Each first adjustment component 53 includes a plunger spring 533. A first support 51 is provided with a second adjustment hole 516 corresponding to the plunger spring 533. The second adjustment hole 516 is a threaded hole adapted to the thread of the plunger spring 533. The plunger spring 533 is installed in the second adjustment hole 516, and its elastic pressing head 5331 abuts against the second support 52. Thus, when one of the plunger springs 533 rotates, its position can be adjusted along the extension direction of the second adjustment hole 516 on the first support 51. Simultaneously, since the elastic pressing heads 5331 of both plunger springs 533 are elastically abutting against the second support 52, and under the limiting action of the first rotating shaft 513, the first support 51 can achieve stepless rotation adjustment around the first axis. After adjustment, the first support 51 remains stationary under the rebound force of the elastic element 531.

[0095] Based on the aforementioned embodiment, the elastic pressure head 5331 is provided with an arc-shaped surface, which abuts against the second bracket 52. Thus, during the adjustment of the position of the plunger spring 533, which drives the first bracket 51 to adjust its position along the first axis, the rotation of the first bracket 51 is flexible and reliable.

[0096] Optionally, the second bracket 52 is provided with a recess 527, which is positioned corresponding to the elastic pressing head 5331. The elastic pressing head 5331 abuts against the recess 527. Specifically, the second bracket 52 has a protrusion extending toward the first bracket 51, and the recess 527 is formed on the portion of the protrusion facing the first bracket 51.

[0097] Optionally, the second bracket 52 is provided with a second clearance opening 528, which is positioned corresponding to the first clearance opening 512. The second clearance opening 528 can avoid the laser beam and prevent it from blocking the laser beam entering the lens 121.

[0098] Similarly, there are many ways to rotatably connect the second bracket 52 to the support shell 54. For example, the second bracket 52 can be provided with a rotating shaft and the support shell 54 can be provided with a corresponding shaft hole; the support shell 54 can be provided with a rotating shaft and the second bracket 52 can be provided with a corresponding shaft hole; or it can be rotatably connected without a shaft; as long as the second bracket 52 is rotatably provided on the support shell 54 around the second axis, it is acceptable.

[0099] Please see Figures 5 to 7In one embodiment, the second bracket 52 is provided with second rotating shafts 529 on opposite sides along the second axis, one side of the support shell 54 is provided with a second limiting groove 541, and the other side of the support shell 54 is provided with a second shaft hole 542. The laser projection light source 10 also includes a second limiting pressure plate 543 detachably disposed on the support shell 54. The second limiting pressure plate 543 is correspondingly disposed with the second limiting groove 541. The second limiting pressure plate 543 and the second limiting groove 541 cooperate to form a third shaft hole 544. The two second rotating shafts 529 are coaxially disposed along the second axis and are rotatably disposed in the second shaft hole 542 and the third shaft hole 544, respectively. Thus, in the step of assembling the second bracket 52 to the support shell 54, one second rotating shaft 529 passes through the second shaft hole 542, and the other second rotating shaft 529 is placed in the second limiting groove 541. Then, the second limiting pressure plate 543 is installed on the support shell 54, which facilitates the assembly and disassembly of the second bracket 52 on the support shell 54. In addition, the second limiting pressure plate 543 and the corresponding second limiting groove 541 cooperate to form a third shaft hole 544 for mounting the second rotating shaft 529. The second limiting pressure plate 543 plays a limiting role, preventing the second rotating shaft 529 from disengaging from the second limiting groove 541. Furthermore, the second bracket 52 is rotatably mounted on the support shell 54, thereby enabling the lens 121 to rotate around the second axis.

[0100] In some embodiments, the second limiting groove 541 is an arc-shaped groove that adapts to the shape of the outer wall of the third rotating shaft, allowing the third rotating shaft to rotate flexibly within the second limiting groove 541. Furthermore, the second limiting pressure plate 543 presses against the side of the third rotating shaft opposite to the bottom wall of the arc-shaped groove. The second limiting pressure plate 543 has an arc-shaped second pressing portion 5431 that adapts to the shape of the outer wall of the second rotating shaft 529, resulting in a circular axial cross-sectional profile of the third shaft hole 544.

[0101] Optionally, the second limiting pressure plate 543 is connected to the support shell 54 via one or more second connectors 56. The second connectors 56 include, but are not limited to, screws, pins, rivets, or snap-fit ​​components. In this embodiment, the opposite ends of the second limiting pressure plate 543 are respectively fixedly mounted to the support shell 54 via the second connectors 56.

[0102] In some embodiments, at least one second rotating shaft 529 is provided with a rotation adjustment handle 5291, which extends outside the second shaft hole 542 or the third shaft hole 544, so that the position of the second bracket 52 can be easily adjusted by hand rotation, thereby realizing stepless rotation adjustment of the lens 121 along the second axis.

[0103] In one embodiment, the support shell 54 includes two support plates 545 and a connecting plate 546. The two support plates 545 are arranged at a distance from each other, and a second bracket 52 is rotatably disposed in the space between the two support plates 545. A second shaft hole 542 is formed in one of the support plates 545, and a step 547 is provided on the side of the other support plate 545. A second limiting groove 541 is formed in the step 547, and a second limiting pressure plate 543 is connected to the step 547. The two support plates 545 are connected by the connecting plate 546.

[0104] In one embodiment, the support shell 54 is provided with a third adjustment hole 548, and the second adjustment assembly 55 includes a locking member 551. The locking member 551 is disposed on the second bracket 52 and is movably inserted into the third adjustment hole 548. When the second bracket 52 rotates around the second axis, it can synchronously drive the locking member 551 to move along the third adjustment hole 548. When the second bracket 52 rotates around the second axis to the target angle position, the locking member 551 locks the second bracket 52 to the support shell 54. Thus, when it is necessary to adjust the rotation angle position of the lens 121 around the second axis, the locking member 551 releases the second bracket 52, causing the second bracket 52 to rotate around the second axis to the target angle position; then, the locking member 551 locks it in place, thereby completing the adjustment of the rotation angle position of the lens 121 around the second axis.

[0105] In some embodiments, the third adjustment hole 548 is configured as an arc-shaped hole, with the center of the arc-shaped hole located at the second rotating shaft 529. Thus, when the second bracket 52 rotates, it synchronously drives the locking member 551 to move along the third adjustment hole 548. The third adjustment hole 548 acts as a moving track for the locking member 551, thereby improving the rotational stability of the second bracket 52 and increasing the adjustment accuracy.

[0106] Based on the aforementioned embodiments, the third adjustment hole 548 and the locking member 551 are not limited to one; for example, there may be at least two third adjustment holes 548 and at least two locking members 551, with at least two locking members 551 corresponding to at least two third adjustment holes 548. Thus, by using at least two locking members 551 to lock and fix the second bracket 52 to the support shell 54, high stability is achieved.

[0107] Specifically, a third adjustment hole 548 is formed in the support plate 545 and is configured as a through hole. The locking member 551 is located on the side of the support plate 545 opposite to the second bracket 52, thereby facilitating the tightness adjustment operation.

[0108] Based on the foregoing embodiments, the locking element 551 may include, but is not limited to, screws, bolts, or snap-fit ​​components. In this embodiment, the locking element 551 is specifically a locking screw, and the second bracket 52 is provided with mounting holes adapted to the locking element 551.

[0109] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0110] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0111] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0112] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0113] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0114] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A laser projection light source, characterized in that, The laser projection light source includes: The outer casing, which is provided with a window; A laser, the laser being mounted at the window of the housing, the laser being configured to emit multiple laser beams toward the interior of the housing; A beam adjustment mechanism is installed inside the housing; A beam combiner assembly is located on the light-emitting side of the laser. The beam combiner assembly is configured to combine the laser beam emitted by the laser. The beam combiner assembly is installed inside the housing. The beam combining lens assembly includes at least two lenses, which are used to combine the laser beam. The at least two lenses are arranged sequentially along the emission direction of the laser beam. At least one lens is correspondingly mounted on a beam adjustment mechanism. The beam adjustment mechanism enables the corresponding lens to rotate and adjust its position around a first axis and a second axis, respectively. The first axis and the second axis are set at an angle, and both the first axis and the second axis are set at an angle to the central optical axis of the lens.

2. The laser projection light source according to claim 1, characterized in that, There are at least two light spot adjustment mechanisms, and at least two lenses are respectively disposed on at least two light spot adjustment mechanisms.

3. The laser projection light source according to claim 1, characterized in that, The light spot adjustment mechanism includes: A first bracket, the first bracket being used to mount the lens; The second bracket is rotatably connected to the first bracket about the first axis; A first adjustment component is provided, wherein both the first bracket and the second bracket are connected to the first adjustment component, and the first adjustment component is used to adjust the rotation angle of the first bracket relative to the second bracket about the first axis. Support housing, the second bracket being rotatably connected to the support housing about the second axis; and The second adjustment component is connected to both the support shell and the second bracket. The second adjustment component is used to adjust the rotation angle of the second bracket relative to the support shell about the second axis.

4. The laser projection light source according to claim 3, characterized in that, The first bracket is provided with a first rotating shaft on each side of the first axis. The second bracket is provided with two first limiting grooves. The laser projection light source also includes two first limiting pressure plates detachably disposed on the second bracket. The two first limiting pressure plates are provided in correspondence with the two first limiting grooves. The first limiting pressure plates and the corresponding first limiting grooves cooperate to form a first shaft hole. The two first rotating shafts are coaxially disposed along the first axis and are rotatably disposed in the two first shaft holes.

5. The laser projection light source according to claim 3 or 4, characterized in that, The first adjustment component is provided as two, and the first adjustment components are respectively located on opposite sides of the first axis; The first adjustment component includes: An elastic element, wherein opposite ends of the elastic element abut against the first bracket and the second bracket respectively; and A first adjusting member is rotatably inserted through the first bracket. The second bracket is provided with a first adjusting hole corresponding to the position of the first adjusting member. The first adjusting member is disposed in the first adjusting hole. When the first adjusting member rotates, it can adjust the distance between the first bracket and the second bracket.

6. The laser projection light source according to claim 4, characterized in that, The first adjustment component is provided as two, and the first adjustment components are respectively located on opposite sides of the first axis; The first adjustment component includes a plunger spring. The first bracket is provided with a second adjustment hole corresponding to the plunger spring. The second adjustment hole is a threaded hole adapted to the thread of the plunger spring. The plunger spring is installed in the second adjustment hole, and the elastic pressing head of the plunger spring abuts against the second bracket.

7. The laser projection light source according to claim 3, characterized in that, The second bracket is provided with a second rotating shaft on each of the opposite sides along the second axis. One side of the support shell is provided with a second limiting groove, and the other side of the support shell is provided with a second shaft hole. The laser projection light source also includes a second limiting pressure plate detachably disposed on the support shell. The second limiting pressure plate is correspondingly disposed with the second limiting groove. The second limiting pressure plate and the second limiting groove cooperate to form a third shaft hole. The two second rotating shafts are coaxially disposed along the second axis and are rotatably disposed in the second shaft hole and the third shaft hole, respectively.

8. The laser projection light source according to claim 7, characterized in that, The supporting shell includes: Two support plates are arranged opposite to each other and spaced apart. A second bracket is rotatably disposed in the spaced area between the two support plates. A second shaft hole is formed in one of the support plates. A step is provided on the side of the other support plate. A second limiting groove is formed on the step. A second limiting pressure plate is connected to the step. A connecting plate, through which the two support plates are connected.

9. The laser projection light source according to claim 7, characterized in that, The support shell is provided with a third adjustment hole. The second adjustment component includes a locking member. The locking member is disposed on the second bracket and is movably inserted into the third adjustment hole. When the second bracket rotates around the second axis, it can synchronously drive the locking member to move along the third adjustment hole. When the second bracket rotates around the second axis to the target angle position, the locking member locks the second bracket to the support shell.

10. A laser projection device, characterized in that, include: The laser projection light source as described in any one of claims 1 to 9 is configured to emit an illumination beam; An optical modulation component is configured to modulate the illumination beam to obtain a projection beam; and A lens is located on the light-emitting side of the optical modulation assembly, and the lens is configured to project the projection beam to form a projected image.

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