Laser projection light source and laser projection equipment

Abstract

The utility model relates to a laser projection light source and laser projection equipment. The light spot adjusting mechanism is arranged on the shell. The light spot adjusting mechanism is used for installing the lens, the lens installed on the light spot adjusting mechanism can rotate around the first axis and the second axis of the lens to adjust the position, and an included angle is formed between the first axis and the second axis. The light spot adjusting mechanism is arranged in the laser projection light source, and the positions of the lenses in the light combination lens group can be adjusted in a rotating mode along the first axis and the second axis by adjusting the light spot adjusting mechanism. The first axis and the second axis are arranged at an included angle with the central optical axis of the lens, that is, the rotation angle of the lens can be adjusted at two different dimensions which are arranged at an included angle with the central optical axis of the lens, so that the central optical axes of the at least two lenses can be adjusted to be parallel to each other and even completely coincide with each other; therefore, the light spot shape correction effect is achieved, and high luminous flux and uniformity are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser projection technology, in particular to a laser projection light source and a laser projection device. BACKGROUND

[0002] The laser projection device includes a laser projection light source, an optical machine and a lens. The illumination beam provided by the laser projection light source becomes a projection beam after being modulated by the optical machine, and is projected onto a screen or a wall by the lens to form a projection image. Among them, the luminous flux (brightness) and the chroma uniformity are two most important indicators of the laser projection device, and the performance indicators directly affect the quality, market positioning and pricing of the laser projection device. As an important component in the laser projection device, the laser projection light source directly determines the energy utilization efficiency of the entire laser projection device, and then affects the final luminous flux, uniformity and other indicators. In the laser projection light source, the control of the shape, size and position of the light spot directly affects the luminous flux and the chroma uniformity of the laser projection light source. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to overcome the defects of the prior art, and to provide a laser projection light source and a laser projection device which can improve the luminous flux and the chroma uniformity of the laser projection light source.

[0004] A laser projection light source, comprising:

[0005] a housing, the housing being provided with a window;

[0006] a laser, the laser being arranged at the window of the housing, and the laser being configured to emit a plurality of laser beams towards the inside of the housing;

[0007] a light spot adjusting mechanism, the light spot adjusting mechanism being arranged inside the housing;

[0008] a light combining lens group, located on the light emitting side of the laser, the light combining lens group being configured to combine the laser beams emitted by the laser, and the light combining lens group being arranged inside the housing;

[0009] The light combining lens group comprises: at least two lenses, the at least two lenses being used for combining the laser beams, the at least two lenses being arranged in sequence along the direction of emission of the laser beams, and at least one of the lenses being correspondingly arranged with a light spot adjusting mechanism, the light spot adjusting mechanism being capable of rotating and adjusting the position of the corresponding lens around a first axis and a second axis, the first axis and the second axis being arranged at an angle, and the first axis and the second axis being arranged at an angle with the central optical axis of the lens.

[0010] In one of the embodiments, the light spot adjusting mechanism is at least two, and at least two of the lenses are arranged in one-to-one correspondence with the at least two light spot adjusting mechanisms.

[0011] In one of the embodiments, the light spot adjusting mechanism comprises a first support for mounting the lens, a second support rotatably connected to the first support around the first axis, a first adjusting assembly connected with the first support and the second support, the first adjusting assembly being used to adjust the rotation angle of the first support relative to the second support around the first axis, a support shell rotatably connected to the second support around the second axis, and a second adjusting assembly connected with the support shell and the second support, the second adjusting assembly being used to adjust the rotation angle of the second support relative to the support shell around the second axis.

[0012] In one of the embodiments, the first support is provided with a first rotating shaft on each of the opposite sides along the first axis, the second support is provided with two first limiting grooves, the laser projection light source further comprises two first limiting pressure plates detachably arranged on the second support, the two first limiting pressure plates are arranged in one-to-one correspondence with the two first limiting grooves, the first limiting pressure plate and the corresponding first limiting groove cooperatively form a first shaft hole, and the two first rotating shafts are coaxially arranged along the first axis and rotatably arranged in the two first shaft holes respectively.

[0013] In one of the embodiments, the first adjusting assembly is provided with two, and the first adjusting assembly is located on each of the opposite sides of the first axis; the first adjusting assembly comprises an elastic member, the opposite ends of the elastic member are respectively abutted between the first support and the second support, and a first adjusting member rotatably arranged in the first support, the second support is provided with a first adjusting hole corresponding to the position of the first adjusting member, the first adjusting member is arranged in the first adjusting hole, and the first adjusting member can adjust the distance between the first support and the second support when rotating.

[0014] In one of the embodiments, the first adjusting assembly is provided with two, and the first adjusting assembly is located on each of the opposite sides of the first axis; the first adjusting assembly comprises a plunger spring, the first support is provided with a second adjusting hole corresponding to the plunger spring, the second adjusting hole is a threaded hole matched with the thread of the plunger spring, the plunger spring is arranged in the second adjusting hole, and the elastic abutting head of the plunger spring is abutted with the second support.

[0015] In one of the embodiments, the second support frame is provided with a second rotating shaft on each side 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 further comprises a second limiting pressing plate detachably arranged on the support shell, the second limiting pressing plate is arranged in correspondence with the second limiting groove, and the second limiting pressing plate and the second limiting groove are cooperatively provided with a third shaft hole, and the two second rotating shafts are coaxially arranged along the second axis and are rotatably arranged in the second shaft hole and the third shaft hole, respectively.

[0016] In one of the embodiments, the support shell comprises two support plates, the two support plates are oppositely and spacedly arranged, the second support frame is rotatably arranged between the two support plates, the second shaft hole is formed in one of the support plates, the side of the other support plate is provided with a step, the second limiting groove is formed on the step, and the second limiting pressing plate is connected to the step; and a connecting plate, the two support plates are connected through the connecting plate.

[0017] In one of the embodiments, the support shell is provided with a third adjusting hole, the second adjusting assembly comprises a locking member, the locking member is arranged on the second support frame, the locking member is movably arranged in the third adjusting hole, and the second support frame can synchronously drive the locking member to move along the third adjusting hole when the second support frame rotates around the second axis; when the second support frame rotates around the second axis to a target angle position, the locking member locks and fixes the second support frame to the support shell.

[0018] A laser projection device, comprising:

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

[0020] An optical modulation assembly is configured to modulate the illumination light beam to obtain a projection light 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 light beam to form a projection picture.

[0022] The laser projection light source and the laser projection device, the laser projection light source is provided with a spot adjusting mechanism, the lens is installed on the spot adjusting mechanism, the lens in the light combiner can be driven to rotate around the first axis and the second axis to adjust the position by adjusting the spot adjusting mechanism, and because the first axis and the second axis are arranged at an angle, and the first axis and the second axis are arranged at an angle with the central optical axis of the lens, that is, the lens can adjust the rotation angle of the lens in two different dimensions arranged at an angle with the central optical axis, and the central optical axes of at least two lenses can be adjusted to be parallel or even completely coincide, thereby playing a role of spot correction, ensuring high luminous flux and uniformity. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structure diagram of the projection system of an embodiment.

[0024] Figure 2 The structure diagram of the laser projection device of an embodiment.

[0025] Figure 3 The projection imaging light path principle diagram of the laser projection device of an embodiment.

[0026] Figure 4 The light path principle diagram of the laser projection light source of an embodiment.

[0027] Figure 5 The perspective structure diagram of the spot adjusting mechanism of an embodiment.

[0028] Figure 6 The Figure 5 The exploded structure diagram of the spot adjusting mechanism shown.

[0029] Figure 7 The Figure 5 Another perspective structure diagram of the spot adjusting mechanism.

[0030] Figure 8 The Figure 5 Still another perspective structure diagram of the spot adjusting mechanism.

[0031] Figure 9 The Figure 5 The sectional structure diagram of the spot adjusting mechanism.

[0032] Figure 10 The Figure 9 The enlarged structure diagram at A.

[0033] Figure 11 The Figure 9 The enlarged structure diagram at 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 the laser projection light source, the shape, size and position of the light spot directly affect the luminous flux and chroma uniformity of the laser projection light source. Different colors or multiple laser beams of the same color emitted by the laser correspond to multiple lenses of the light combination lens group. Under the processing of the multiple lenses, multiple laser beams are combined into one beam. The shape of each laser beam irradiated on the corresponding lens is consistent with the theory. When the centers of the light spots formed by different laser beams on the lenses coincide, the optical transmission efficiency of the laser projection light source is the highest, the mixing effect is the most uniform, and the luminous flux (brightness) and chroma uniformity are also the best. That is, the smaller the position accuracy tolerance of the light combination lens group, the higher the optical utilization efficiency. In order to ensure the best optical efficiency of the system, the laser projection equipment designs the position tolerance of the light combination lens smaller and smaller, which puts forward higher requirements for the precision of the structure and the difficulty of debugging. However, as in the background art, the lenses of the light combination lens group are usually directly fixed in the lens grooves of the shell, and the coaxiality deviation value of the lens groove is, for example, 0.15 to 0.25. The coaxiality deviation value is large and does not meet the requirements. Therefore, the shell needs to be processed in a post-processing manner to reduce the coaxiality deviation value of the two lens grooves, so that the center optical axes of the two optical devices are parallel or even coincide. However, the post-processing method will seriously reduce the operation efficiency. Of course, in the related art, a support for installing the lens is also provided, and the support is rotatably arranged on the shell in a certain direction. Rotating the support drives the lens to rotate synchronously, thereby adjusting the direction of the center optical axis of the lens. However, the light spot shape of each laser beam irradiated on the corresponding lens is not consistent with the theoretical shape, and the luminous flux and chroma uniformity of the laser projection light source still need to be improved.

[0040] Based on the above reasons, the present application provides a laser projection light source and a laser projection device which can improve the luminous flux and chroma uniformity of the laser projection light source.

[0041] Figure 1 A structural diagram of a projection system of an embodiment, the projection system comprising a laser projection device 1 and a projection screen 2.

[0042] Figure 2 A structural diagram of a laser projection device 1 according to some embodiments. Referring to Figure 2 , the laser projection device 1 comprises a laser projection light source 10, a light modulation assembly 20 and a lens 30. The laser projection device 1 can also comprise a shell 40 (only part of the shell 40 is shown in Figure 2 ).

[0043] The laser projection light source 10 is configured to provide an illumination light beam (laser light beam). The light modulation assembly 20 is configured to modulate the illumination light beam provided by the laser projection light source 10 with an image signal to obtain a projection light beam. The lens 30 is configured to project the projection light beam on a screen or a wall to form a projection picture. 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 in sequence along the direction of light beam propagation.

[0044] The laser projection light source 10, the light modulation assembly 20 and the lens 30 can be respectively wrapped by corresponding housings 40. The housings 40 corresponding to the laser projection light source 10, the light modulation assembly 20 and the lens 30 respectively can support the corresponding optical components and make the optical components meet certain sealing or air-tightness requirements.

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

[0046] In some embodiments, the arrangement direction of the laser projection light source 10 and the light modulation assembly 20 is substantially perpendicular to the arrangement direction of the light modulation assembly 20 and the lens 30, that is, in the laser projection device 1, the direction of projection light beam emission (for example, parallel to the N direction) is substantially perpendicular to the direction of illumination light beam emission (for example, parallel to the M direction). This connection structure can on the one hand adapt to the light path characteristics of the reflective light valve 240 (to be described below) in the light modulation assembly 20, and on the other hand, it is also beneficial to shorten the length of the light path in one direction, so that more space can be provided for arranging the components of the laser projection device 1.

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

[0048] Please refer to Figure 4 , Figure 4 For the light path principle diagram of the laser projection light source 10 of the laser projection device 1 of an embodiment. The laser projection light source 10 includes a laser 110 and a light combination lens group 120.

[0049] Among them, the laser 110 is configured to emit a plurality of laser light beams. The colors of the plurality of laser light beams can be the same color or different colors, which are not limited here. The number of lasers 110 is not limited to one, for example, two, three, four or more.

[0050] It should be noted that the laser projection light source 10 further comprises a shell, the shell is provided with a window, and the laser 110 is specifically arranged at the window of the shell.

[0051] In some examples, the laser 110 is arranged as a monochromatic laser, which can emit laser beams of various wavelengths such as blue, green or red, and the specific wavelength can be flexibly adjusted and arranged according to actual needs, which is not limited herein. In addition, the lamp group of the monochromatic laser is arranged as at least two, and the laser beams emitted by each lamp group are of the same color. The brightness of the light spot increases with the increase of the number of lamp groups of the monochromatic laser. The laser projection light source 10 further comprises a wavelength conversion device for receiving the laser beams of the monochromatic laser and converting them into laser beams of other wavelengths, which are used together with the generated laser beams of other wavelengths to form the illumination beam. Optionally, the wavelength conversion device is, for example, a fluorescent wheel.

[0052] In some examples, the laser 110 is not limited to a monochromatic laser, but can also be, for example, arranged as a trichromatic laser for emitting a trichromatic laser beam, without the need to arrange a wavelength conversion device, and the color gamut of the trichromatic laser is wide and the brightness is high, which can provide a high-quality illumination beam. Specifically, the trichromatic laser comprises three lamp groups for emitting three different waveband laser beams, and the three different waveband laser beams are respectively a first waveband laser beam, a second waveband laser beam and a third waveband laser beam, which are specifically, for example, red, green and blue. The lamp group can be one or more light emitting chips, one or more LED lamps, etc.

[0053] The light combining lens group 120 is located on the light emitting side of the laser 110, and the light combining lens group 120 is configured to combine the laser beams emitted by the laser 110. The light combining lens group 120 is arranged inside the shell. Specifically, the light combining lens group 120 comprises at least two lenses 121, the at least two lenses 121 are used to combine the laser beams, and the at least two lenses 121 are arranged in sequence along the emission direction of the laser beams.

[0054] The lens 121 is specifically, for example, a reflecting lens or a two-way lens, etc.

[0055] The laser 110 comprises at least two lamp groups, and the at least two lamp groups are arranged in one-to-one correspondence with the at least two lenses 121. The laser beams emitted by the lamp group are incident to the corresponding lens 121, and are reflected outward by the lens 121, which can realize the combination of the at least two laser beams.

[0056] On the basis of the foregoing embodiment, the laser projection light source 10 further comprises a converging lens group. The converging lens group is located on the light emitting side of the light combining lens group 120, and the converging lens group is configured to converge the laser beams combined by the light combining lens group 120.

[0057] Specifically, the converging lens group comprises, in sequence along the outgoing direction of the converging lens group 120, a first convex lens 130, a first reflecting mirror 140, and a concave lens 150. The first convex lens 130 is also referred to as a large telescope, and the concave lens 150 is also referred to as a small telescope.

[0058] In some examples, the laser projection light source 10 can further comprise a first light homogenizing device. The first light homogenizing device is specifically, for example, a diffusion wheel, a light pipe, or the like. The first light homogenizing device is located on the light outgoing side of the converging lens group, and is configured to homogenize the laser light beam converged by the converging lens group, so that the chromatic uniformity of the light spot is improved.

[0059] Please refer to Figure 3 , the light modulation assembly 20 comprises a second light homogenizing device 210, a second reflecting mirror 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 light beam incident thereinto into a projection light beam according to an image signal, and to project the projection light beam to the lens 30. The second light homogenizing device 210 and the light valve 240 are sequentially arranged along the propagation direction of the light beam. The second light homogenizing device 210 is configured to homogenize the illumination light beam incident thereinto and project the homogenized light beam to the light valve 240.

[0060] In some embodiments, the second light homogenizing device 210 is a light pipe. The light pipe receives the illumination light beam provided by the laser projection light source 10 and homogenizes the illumination light beam. In some embodiments, the light outgoing port of the light pipe is rectangular. The light pipe can shape the light spot of the light beam so that the shape of the light spot of the light beam matches the shape of the light valve 240. In some embodiments, the second light 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 comprises a plurality of reflecting pieces, each of which corresponds to a pixel in the projection picture. Illustratively, according to the projection picture to be displayed, the reflecting piece corresponding to the pixel to be displayed in bright state among the plurality of reflecting pieces of the light valve 240 can reflect the light beam to the lens 30, and the light beam reflected to the lens 30 is referred to as a projection light beam. In this way, the light valve 240 can modulate the illumination light beam to obtain the projection light beam, and realize the display of the picture through the projection light beam.

[0062] In some embodiments, the light valve 240 is a Digital Micromirror Device (DMD). The DMD comprises a plurality of (for example, thousands of) micro reflecting pieces that can be individually driven to rotate. The plurality of micro reflecting pieces can be arranged in an array. One micro reflecting piece (for example, each micro reflecting piece) corresponds to a pixel in the projection picture to be displayed.

[0063] Please refer to Figure 3In some embodiments, the laser projection device 1 can further include an illumination mirror group between the light valve 240 and the second light homogenizing device 210, which includes a second reflecting mirror 220, a second convex lens 230, and a prism assembly 250. The light beam homogenized by the second light homogenizing device 210 can pass through the illumination mirror group to the light valve 240.

[0064] The illumination light beam emitted from the second light homogenizing device 210 is directed to the second reflecting mirror 220, which reflects the illumination light beam incident thereon to the second convex lens 230. The second convex lens 230 converges the illumination light beam incident thereon to the prism assembly 250, which reflects the illumination light beam incident thereon to the light valve 240.

[0065] On the basis of the foregoing embodiments, the laser projection light source 10 further includes a spot adjusting mechanism 50 arranged inside the housing. The spot adjusting mechanism 50 is configured to arrange the lens 121, so that the lens 121 arranged thereon is adjusted in position by rotating around the first axis and the second axis of the lens 121, respectively. The first axis and the second axis are arranged at an angle, and both the first axis and the second axis are arranged at an angle with 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°, and specifically for example, 30°, 45°, 60°, 90°, 120°, 135°, or 150°, and the like.

[0066] As can be seen, in the laser projection light source 10, the spot adjusting mechanism 50 is arranged, and the lens 121 in the light combining mirror group 120 is arranged in the spot adjusting mechanism 50. By adjusting the spot adjusting mechanism 50, the lens 121 in the light combining mirror group 120 is driven to rotate around the first axis and the second axis to adjust the position, respectively. Since the first axis and the second axis are arranged at an angle, and both the first axis and the second axis are arranged at an angle with the central optical axis of the lens, the lens can be adjusted in rotation angle in two different dimensions arranged at an angle with the central optical axis thereof, and the central optical axes of at least two lenses can be adjusted to be parallel or even completely coincide with each other, thereby playing a role of spot correction, and ensuring high luminous flux and uniformity.

[0067] Specifically, when the spot is adjusted for three different waveband laser beams, the central spots of the three colors can be overlapped, the system luminous flux and chroma uniformity are ensured, and the work efficiency is improved.

[0068] Specifically, the first and second axes are, for example, axes in two different directions of extension passing through the center positions of the lenses 121. In this way, after the spot adjusting mechanism 50 drives the lenses 121 to rotate to adjust positions around the first and second axes, the center positions of the lenses 121 remain unchanged. Especially when the center positions of the lenses 121 are on the same straight line, it is beneficial to quickly adjust the lenses 121 to be coaxial.

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

[0070] In one specific embodiment, the number of the spot adjusting mechanisms 50 is at least two, and the at least two lenses 121 are one-to-one correspondingly arranged on the at least two spot adjusting mechanisms 50. The spot adjusting mechanism 50 can drive the corresponding lens 121 to rotate to adjust positions along the first and second axes, respectively. In this way, the shapes of the laser beams incident on the corresponding lenses 121 are consistent with the theory. When the centers of the spots formed by different laser beams on the lenses 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 chroma uniformity are also the best. It can realize the synthesis of multiple laser beams into one beam.

[0071] As an optional solution, the number of the spot adjusting mechanisms 50 can be less than the number of the lenses 121. Please refer to Figure 4 , for example, the number of the lenses 121 is three, and the number of the spot adjusting mechanisms 50 is two. Two of the lenses 121 are arranged on the two spot adjusting mechanisms 50, respectively, and the other lens 121 can not be arranged on the spot adjusting mechanism 50 and is, for example, fixedly arranged on the shell.

[0072] Of course, as an optional solution, the number of the spot adjusting mechanisms 50 can also be one, and the number of the lenses 121 is, for example, two. One of the lenses 121 is arranged on the spot adjusting mechanism 50, and the other lens 121 is fixedly arranged inside the shell. The spot adjusting mechanism 50 drives one of the lenses 121 to rotate to adjust positions along the first and second axes, respectively, so that the center optical axes of the two lenses 121 are parallel to each other or coincide. In this way, the shapes of the laser beams incident on the corresponding lenses 121 are also consistent with the theory, so that the luminous flux and uniformity can be improved.

[0073] Please refer to Figures 5 to 8 , on the basis of the foregoing embodiment, the spot adjusting mechanism 50 comprises a first support 51, a second support 52, a first adjusting assembly 53, a support shell 54 and a second adjusting assembly 55.

[0074] The first support 51 is used for mounting the lens 121. Optionally, the mounting manner of the lens 121 on the first support 51 includes but is not limited to adhesion, elastic piece fixing or other fixing manners, which are not limited herein and can be set according to actual needs. In addition, the first support 51 is, for example, provided as a mounting plate, and the mounting plate is provided 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 position of the lens 121, which can be beneficial to the rotation of the first support 51 around the first axis. In addition, a first avoiding opening 512 is opened on the bottom wall of the mounting groove 511, and the first avoiding opening 512 can avoid the laser beam and prevent the laser beam entering the lens 121 from being blocked.

[0075] The first support 51 is rotatably connected to the second support 52 around the first axis. The first support 51 and the second support 52 are connected with the first adjusting assembly 53, and the first adjusting assembly 53 is used for adjusting the rotation angle of the first support 51 relative to the second support around the first axis.

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

[0077] Optionally, the support shell 54 is not limited to be used for mounting the second support 52, the first support 51 and the lens 121, but can also be used for mounting other optical devices, which are not expanded herein.

[0078] The support shell 54 and the second support 52 are connected with the second adjusting assembly 55, and the second adjusting assembly 55 is used for adjusting the rotation angle of the second support 52 relative to the support shell 54 around the second axis.

[0079] In this way, the first adjusting assembly 53 can adjust the rotation angle of the first support 51 around the first axis around the first axis, and further can adjust the rotation angle of the lens 121 mounted by the first support 51 around the first axis; in addition, the second adjusting assembly 55 can adjust the rotation angle of the second support 52 around the second axis around the second axis, and further can adjust the rotation angle of the lens 121 mounted by the first support 51 around the second axis. Thus, the lens 121 can be infinitely rotated and adjusted in position around the first axis and the second axis, so that the center optical axis of each lens 121 can be quickly realized to be parallel or even coincided, and the adjustment operation is relatively convenient and fast.

[0080] It should be noted that the first axis is, for example, indicated by the double-headed arrow x in Figure 5 , and the second direction is, for example, indicated by the double-headed arrow y in Figure 5 .

[0081] It should be noted that the rotating connection mode of the first support 51 to the second support 52 is various. For example, the first support 51 can be provided with a rotating shaft, and the second support 52 is correspondingly provided with a shaft hole; or the second support 52 can be provided with a rotating shaft, and the first support 51 is correspondingly provided with a shaft hole; or the two supports can be connected in a shaftless manner. As long as the first support 51 is rotatably arranged on the second support 52 around the first axis, it is acceptable.

[0082] Please refer to Figure 5 , Figure 6 and Figure 8 In one embodiment, the first support 51 is provided with a first rotating shaft 513 on each of the opposite sides along the first axis, and the second support 52 is provided with two first limiting grooves 521. The laser projection light source 10 further comprises two first limiting pressure plates 522 which are detachably arranged on the second support 52. The two first limiting pressure plates 522 are arranged one-to-one corresponding to the two first limiting grooves 521, and the first limiting pressure plate 522 and the corresponding first limiting groove 521 cooperatively form a first shaft hole 523. The two first rotating shafts 513 are coaxially arranged along the first axis and are rotatably arranged in the two first shaft holes 523, respectively. In this way, in the step of assembling the first support 51 to the second support 52, the two first rotating shafts 513 of the first support 51 are placed in the two first limiting grooves 521, respectively; then the two first limiting pressure plates 522 are connected with the first support 51, and the first limiting pressure plate 522 and the corresponding first limiting groove 521 cooperatively form the first shaft hole 523 for arranging the first rotating shaft 513. The first limiting pressure plate 522 plays a limiting role and can prevent the first rotating shaft 513 from being separated from the first limiting groove 521. The first support 51 can be rotatably arranged on the second support 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, and the arc-shaped groove is adapted to the shape of the outer wall of the first rotating shaft 513, so that the first rotating shaft 513 can rotate flexibly in the first limiting groove 521. In addition, the first limiting pressure plate 522 abuts against the side of the first rotating shaft 513 away from the bottom wall of the arc-shaped groove, and the first limiting pressure plate 522 is provided with an arc-shaped first abutting portion 5221 which is adapted to the shape of the outer wall of the first rotating shaft 513, so that the axial cross-sectional profile of the first shaft hole 523 is circular.

[0084] Optionally, the first limiting pressure plate 522 is connected to the second support 52 by one or more first connecting members 524. The first connecting member 524 includes but is not limited to a screw, a pin, a rivet or a clamping member, etc. In this embodiment, the opposite ends of the first limiting pressure plate 522 are fixedly arranged on the second support 52 by the first connecting member 524.

[0085] Please refer toFigures 9 to 11 In some embodiments, the first support 51 and the second support 52 are in clearance fit. In this way, the first support 51 and the second support 52 reserve a clearance space for adjusting the angular position of the first support 51 rotating around the first axis. The size of the clearance space can be adjusted and set according to actual needs, as long as the first support 51 can adjust the rotating angle within a preset angle range around the first axis. In addition, the clearance space of the first support 51 and the second support 52 can prevent the adjustment angle of the first support 51 around the first axis from being greater than the preset angle, thereby improving the installation stability of the second support 52.

[0086] Please refer to Figure 6 , Figure 9 and Figure 11 In one embodiment, the first adjusting assembly 53 is provided with two, and the first adjusting assembly 53 is respectively located on the opposite sides of the first axis. The first adjusting assembly 53 includes an elastic member 531 and a first adjusting member 532. The opposite ends of the elastic member 531 are respectively abutted between the first support 51 and the second support 52. The first adjusting member 532 is rotatably provided in the first support 51. The second support 52 is provided with a first adjusting hole 525 corresponding to the position of the first adjusting member 532. The first adjusting member 532 is arranged in the first adjusting hole 525, and the first adjusting member 532 can adjust the distance between the first support 51 and the second support 52 when rotating.

[0087] Specifically, the first adjusting member 532 includes a head portion 5321 and a rod portion 5322 connected with the head portion 5321, the head portion 5321 is abutted with the side of the first support 51 away from the second support 52, and the rod portion 5322 is arranged in the first adjusting hole 525. The first adjusting hole 525 is a threaded hole, and the rod portion 5322 is provided with threads corresponding to the first adjusting hole 525. In this way, any one of the first adjusting assemblies 53 can be operated according to actual needs to complete the stepless rotating adjustment of the lens 121 around the first axis.

[0088] Specifically, two first adjusting assemblies 53 are respectively located at opposite ends of the first support 51. When the first adjusting member 532 in the first adjusting assembly 53 at the first end is rotated, the first adjusting member 532 can correspondingly adjust the distance between the first end of the first support 51 and the second support 52, and the distance between the second end of the first support 51 and the second support 52 is adaptively adjusted under the action of the elastic member 531; conversely, when the first adjusting member 532 in the first adjusting assembly 53 at the second end is rotated, the first adjusting member 532 can correspondingly adjust the distance between the second end of the first support 51 and the second support 52, and the distance between the first end of the first support 51 and the second support 52 is adaptively adjusted under the action of the elastic member 531. After the first support 51 is adjusted, it remains stationary under the rebounding force of the elastic member 531, so that the first support 51 can be adjusted in position around the first axis.

[0089] On the basis of the foregoing embodiment, the elastic member 531 includes but is not limited to a spring or an elastic block, etc. In this embodiment, the elastic member 531 is a spring, and the first adjusting member 532 is arranged in the spring.

[0090] Please refer to Figure 6 and Figure 11 Optionally, the second support 52 is provided with a first positioning portion 526, and one end of the spring is positioned in the first positioning portion 526. The first positioning portion 526 is specifically, for example, a positioning column, and one end of the spring is sleeved in the first positioning portion 526. Further, the first adjusting hole 525 is formed in the positioning column. In this way, one end of the spring is positioned by the first positioning portion 526, and the stability is higher.

[0091] In addition, the side of the first support 51 facing the second support 52 is provided with a second positioning portion 514, and the other end of the spring is positioned in the second positioning portion 514. Optionally, the second positioning portion 514 is specifically, for example, a positioning groove, and the other end of the spring is arranged inside the positioning groove. In this way, the other end of the spring is positioned by the second positioning portion 514, and the stability is higher.

[0092] Optionally, the first adjusting member 532 includes but is not limited to a screw, a bolt or a screw rod, etc.

[0093] Optionally, the first support 51 is provided with an assembly hole 515, the assembly hole 515 is a through hole, and the first adjusting member 532 is rotatably arranged in the assembly hole 515. Specifically, the assembly hole 515 is a counterbore, and the head portion 5321 of the first adjusting member 532 is accommodated in the counterbore.

[0094] Please refer to Figures 12 to 14In another embodiment, the first adjusting assembly 53 is provided with two first adjusting assemblies 53, which are respectively arranged on opposite sides of the first axis. The first adjusting assembly 53 comprises a plunger spring 533, and the first support 51 is provided with a second adjusting hole 516 corresponding to the plunger spring 533. The second adjusting hole 516 is a threaded hole adapted to the thread of the plunger spring 533. The plunger spring 533 is arranged in the second adjusting hole 516, and the elastic pressing head 5331 of the plunger spring 533 abuts against the second support 52. In this way, when one of the plunger springs 533 is rotated, the first support 51 can be adjusted in position along the extension direction of the second adjusting hole 516. Since the elastic pressing heads 5331 of the two plunger springs 533 abut against the second support 52 elastically, and are limited by the first rotating shaft 513, the first support 51 can be adjusted in position in a stepless manner around the first axis. After the adjustment of the first support 51 is completed, the first support 51 can be kept in position under the rebounding force of the elastic member 531.

[0095] On the basis of the foregoing embodiment, the elastic pressing head 5331 is provided with an arc surface, which abuts against the second support 52. In this way, when the plunger spring 533 is adjusted in position to drive the first support 51 to be adjusted in position along the first axis, the rotation of the first support 51 is flexible and reliable.

[0096] Optionally, the second support 52 is provided with a recess 527, which is arranged in position corresponding to the elastic pressing head 5331. The elastic pressing head 5331 abuts against the recess 527. Specifically, the second support 52 is formed with a protruding portion extending towards the first support 51, and the recess 527 is formed at the portion of the protruding portion facing the first support 51.

[0097] Optionally, the second support 52 is provided with a second avoiding hole 528, which is arranged in position corresponding to the first avoiding hole 512. The second avoiding hole 528 can avoid the laser beam and prevent the laser beam entering the lens 121 from being blocked.

[0098] Similarly, the second support 52 can be connected to the support shell 54 in various rotating connection modes. For example, the second support 52 can be provided with a rotating shaft, and the support shell 54 is correspondingly provided with a shaft hole. Alternatively, the support shell 54 can be provided with a rotating shaft, and the second support 52 is correspondingly provided with a shaft hole. Alternatively, the second support 52 and the support shell 54 can be connected in a shaftless manner. As long as the second support 52 is arranged on the support shell 54 in a manner of rotating around the second axis, the connection modes can be selected as required.

[0099] Please refer to Figures 5 to 7In one embodiment, the second support 52 is provided with a second rotating shaft 529 on each side 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 further comprises a second limiting pressing plate 543 detachably arranged on the support shell 54. The second limiting pressing plate 543 is arranged corresponding to the second limiting groove 541, and the second limiting pressing plate 543 and the second limiting groove 541 cooperatively form a third shaft hole 544. The two second rotating shafts 529 are coaxially arranged along the second axis and are rotatably arranged in the second shaft hole 542 and the third shaft hole 544, respectively. In this way, in the process of assembling the second support 52 to the support shell 54, one second rotating shaft 529 is arranged in the second shaft hole 542, and the other second rotating shaft 529 is arranged in the second limiting groove 541. Then, the second limiting pressing plate 543 is arranged on the support shell 54. It can be seen that the second support 52 can be conveniently disassembled and assembled on the support shell 54. In addition, the second limiting pressing plate 543 and the corresponding second limiting groove 541 cooperatively form the third shaft hole 544 for arranging the second rotating shaft 529. The second limiting pressing plate 543 plays a limiting role and can prevent the second rotating shaft 529 from being separated from the inside of the second limiting groove 541. In addition, the second support 52 is rotatably arranged on the support shell 54, so that the lens 121 can be driven to rotate around the second axis.

[0100] In some embodiments, the second limiting groove 541 is an arc-shaped groove, which is adapted to the shape of the outer wall of the third rotating shaft and meets the flexible rotation of the third rotating shaft in the second limiting groove 541. In addition, the second limiting pressing plate 543 is pressed against the side of the third rotating shaft away from the bottom wall of the arc-shaped groove. The second limiting pressing plate 543 is provided with an arc-shaped second pressing portion 5431, which is adapted to the shape of the outer wall of the second rotating shaft 529, so that the axial cross-sectional profile of the third shaft hole 544 is circular.

[0101] Optionally, the second limiting pressing plate 543 is connected to the support shell 54 by one or more second connecting members 56. The second connecting member 56 includes but is not limited to a screw, a pin, a rivet or a clamping member, etc. In this embodiment, the opposite ends of the second limiting pressing plate 543 are fixedly arranged on the support shell 54 by the second connecting member 56.

[0102] In some embodiments, at least one second rotating shaft 529 is provided with a rotating adjusting handle 5291, which protrudes outside the second shaft hole 542 or the third shaft hole 544, so as to be conveniently held and rotated to adjust the position of the second support 52, thereby realizing the stepless rotation adjustment of the lens 121 along the second axis.

[0103] In one embodiment, the support shell 54 comprises two support plates 545 and a connecting plate 546. The two support plates 545 are oppositely spaced, the second support 52 is rotatably arranged in the spacing region between the two support plates 545, the second shaft hole 542 is formed in one of the support plates 545, the side of the other support plate 545 is provided with a step 547, the second limiting groove 541 is formed in the step 547, and the second limiting plate 543 is connected to the step 547. The two support plates 545 are connected through the connecting plate 546.

[0104] In one embodiment, the support shell 54 is provided with a third adjusting hole 548, and the second adjusting assembly 55 comprises a locking member 551. The locking member 551 is arranged on the second support 52 and movably penetrates the third adjusting hole 548. When the second support 52 rotates around the second axis, the locking member 551 can be synchronously moved along the third adjusting hole 548. When the second support 52 rotates around the second axis to the target angular position, the locking member 551 locks and fixes the second support 52 to the support shell 54. In this way, when it is necessary to adjust the rotation angle position of the lens 121 around the second axis, the locking member 551 is loosened to make the second support 52 rotate around the second axis to the target angular position, and then the locking member 551 is locked and fixed, so that the rotation angle position of the lens 121 around the second axis can be adjusted.

[0105] In some embodiments, the third adjusting hole 548 is an arc-shaped hole, and the center of the arc-shaped hole is located at the second rotating shaft 529. In this way, when the second support 52 rotates, the locking member 551 can be synchronously moved along the third adjusting hole 548. The third adjusting hole 548 corresponds to the movement track of the locking member 551, thereby improving the rotation stability of the second support 52 and improving the adjustment accuracy.

[0106] On the basis of the foregoing embodiments, the third adjusting hole 548 and the locking member 551 are not limited to one. For example, the third adjusting hole 548 is at least two, the locking member 551 is at least two, and the at least two locking members 551 are correspondingly arranged with the at least two third adjusting holes 548. In this way, the at least two locking members 551 are used to lock and fix the second support 52 to the support shell 54, and the stability is higher.

[0107] Specifically, the third adjusting hole 548 is formed in the support plate 545 and is provided as a through hole. The locking member 551 is located on the side of the support plate 545 away from the second support 52, thereby facilitating the loosening and tightening adjustment operation.

[0108] On the basis of the foregoing embodiments, the locking member 551 includes but is not limited to a screw, a bolt, or a clamping member, etc. In this embodiment, the locking member 551 is specifically a locking screw, and the second support 52 is provided with a mounting hole corresponding to the locking member 551.

[0109] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0110] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0111] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0112] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0113] It is to be noted that when an element such as a layer, film, or region is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. It will be understood that, when an element or layer is referred to as being "connected" to or "coupled" to another element or layer, it can be directly connected or coupled or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0114] Various technical features described in the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations are described. It will be understood that the scope of the disclosure encompasses all such possible combinations.

[0115] The above-described embodiments are merely illustrative for the present application and are not to be used in a limiting manner. It should be understood by those skilled in the art that various modifications and improvements can be made to the present application without departing from the scope of the present application. Therefore, the scope of the present application should be defined by the appended claims.

Claims

1. A laser projection light source, characterized by, The laser projection light source comprises: a housing provided with a window; a laser installed at the window of the housing, the laser being configured to emit a plurality of laser beams towards the inside of the housing; a spot adjusting mechanism installed inside the housing; a light combiner located at the light emitting side of the laser, the light combiner being configured to combine the laser beams emitted by the laser, the light combiner being installed inside the housing; the light combiner comprises at least two lenses for combining the laser beams, the at least two lenses being arranged in sequence along the direction of emission of the laser beams, at least one lens being correspondingly installed on a spot adjusting mechanism, the spot adjusting mechanism being capable of rotating and adjusting the position of the corresponding lens about a first axis and a second axis, the first axis and the second axis being arranged at an angle, and the first axis and the second axis each being arranged at an angle with the central optical axis of the lens.

2. The laser projection light source of claim 1, wherein, The spot adjusting mechanism is at least two, and at least two lenses are arranged one by one in at least two spot adjusting mechanisms.

3. The laser projection light source of claim 1, wherein, The spot adjusting mechanism comprises: a first support for installing the lens; a second support, the first support being rotatably connected to the second support about the first axis; a first adjusting assembly, the first support and the second support being connected to the first adjusting assembly, the first adjusting assembly being used to adjust the rotation angle of the first support about the first axis relative to the second support; a support shell, the second support being rotatably connected to the support shell about the second axis; and a second adjusting assembly, the support shell and the second support being connected to the second adjusting assembly, the second adjusting assembly being used to adjust the rotation angle of the second support about the second axis relative to the support shell.

4. The laser projection light source of claim 3, wherein, The first support is provided with a first shaft on opposite sides of the first axis, the second support is provided with two first limiting grooves, the laser projection light source further comprises two first limiting pressure plates which are detachably arranged on the second support, the two first limiting pressure plates and the two first limiting grooves are arranged one by one, the first limiting pressure plate and the corresponding first limiting groove cooperate to form a first shaft hole, and the two first shafts are coaxially arranged along the first axis and rotatably arranged in the two first shaft holes.

5. The laser projection light source according to claim 3 or 4, characterized in that, The first adjusting assembly is provided with two, and the first adjusting assembly is located on opposite sides of the first axis; The first adjusting assembly comprises: a resilient member, the opposite ends of the resilient member abutting between the first support and the second support; and a first adjusting member, the first adjusting member being rotatably arranged in the first support, the second support being provided with a first adjusting hole corresponding to the position of the first adjusting member, the first adjusting member being arranged in the first adjusting hole, and the first adjusting member being capable of adjusting the distance between the first support and the second support when rotating.

6. The laser projection light source of claim 4, wherein, The first adjusting assembly is two, and the first adjusting assembly is respectively located on opposite sides of the first axis; The first adjusting assembly comprises a plunger spring, the first support is provided with a second adjusting hole corresponding to the plunger spring, the second adjusting hole is a threaded hole matched with the thread of the plunger spring, the plunger spring is arranged in the second adjusting hole, and the elastic pressing head of the plunger spring abuts against the second support.

7. The laser projection light source of claim 3, wherein, The second support is provided with a second rotating shaft on opposite sides of the second axis respectively, one side of the support shell is provided with a second limiting groove, the other side of the support shell is provided with a second shaft hole, the laser projection light source further comprises a second limiting pressing plate detachably arranged on the support shell, the second limiting pressing plate is arranged corresponding to the second limiting groove, the second limiting pressing plate and the second limiting groove cooperatively form a third shaft hole, and the two second rotating shafts are coaxially arranged along the second axis and are rotatably arranged in the second shaft hole and the third shaft hole respectively.

8. The laser projection light source of claim 7, wherein, The support shell comprises: two support plates, the two support plates are arranged at intervals, the second support is rotatably arranged between the two support plates, the second shaft hole is formed in one of the support plates, the side of the other support plate is provided with a step, the second limiting groove is formed on the step, and the second limiting pressing plate is connected to the step; and a connecting plate, the two support plates are connected through the connecting plate.

9. The laser projection light source of claim 7, wherein, The support shell is provided with a third adjusting hole, the second adjusting assembly comprises a locking piece, the locking piece is arranged on the second support, the locking piece is movably arranged in the third adjusting hole, and the second support can synchronously drive the locking piece to move along the third adjusting hole when the second support rotates around the second axis; when the second support rotates around the second axis to a target angle position, the locking piece locks and fixes the second support on the support shell.

10. A laser projection device, comprising: comprises: the laser projection light source of any one of claims 1 to 9, configured to emit an illumination beam; an optical modulation assembly, configured to modulate the illumination beam to obtain a projection beam; and a lens, located on the light emitting side of the optical modulation assembly, configured to project the projection beam to form a projection picture.

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