WO2021121408A1

WO2021121408A1 - Laser projection light source and laser projection device

Info

Publication number: WO2021121408A1
Application number: PCT/CN2020/137754
Authority: WO
Inventors: 赵云
Original assignee: 青岛海信激光显示股份有限公司
Priority date: 2019-12-20
Filing date: 2020-12-18
Publication date: 2021-06-24
Also published as: CN113009753A

Abstract

A laser projection light source and a laser projection device. The laser projection light source comprises a housing (200), a laser (1) borne on the housing (200) and used for emitting first laser light (11), and a light combining assembly (2), a first lens assembly (3), and a fluorescent wheel (4) which are all provided in the housing (200). The first lens assembly (3) and the fluorescent wheel (4) are both disposed on an optical path of the first laser light (11), and the first lens assembly (3) is located on the side of the fluorescent wheel (4) close to the laser (1). The fluorescence wheel (4) is provided with a fluorescence reflection region (41), the fluorescence reflection region (41) is used for reflecting fluorescence (42) generated by excitation of the first laser light (11) to the light combining assembly (2). The light combining assembly (2) is located on an optical path of second laser light (12) formed after the first laser light (11) irradiates the fluorescent wheel (4), and used for combining the second laser light (12) and the fluorescence (42) and outputting same. An optical axis of the first lens assembly (3) and an optical axis of the first laser light (11) are arranged heteroaxially. The laser projection light source solves the problem of low overall transmittance of the fluorescence (42) of the first lens assembly (3).

Description

Laser projection light source and laser projection equipment

This application claims priority to be submitted to the Chinese Patent Office on December 20, 2019, with the application number 201911323873.5 and the title of the invention "a laser projection light source and laser projection equipment", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the technical field of laser projection light sources, and in particular to a laser projection light source and laser projection equipment.

Background technique

In the field of projection display technology, laser projection light source, as a solid-state light source, has a series of advantages such as high brightness, high efficiency, long life, good color gamut, and environmental protection, and has become a new choice of projection light sources. At the same time, as projection display products gradually move from meeting rooms to homes, laser projection products have also become a new type of consumer electronic products that are welcomed by consumers.

A laser projection light source in the related art, as shown in FIG. 1, includes a fluorescence conversion system. The fluorescence conversion system includes a light combining component 01, a laser 02 for emitting a first laser 021, and an emission direction along the first laser 021 The lens assembly 03 and the fluorescent wheel 04 are arranged in order on the optical path of the first laser 021; the fluorescent wheel 04 has a fluorescent reflection area, and the fluorescent reflection area is used to reflect the fluorescent 041 generated by the excitation of the first laser 021 to the light combining component 01; The lens assembly 03 is located on the optical path of the fluorescent 041; the light combining assembly 01 is located on the optical path of the second laser 022 formed after the first laser 021 irradiates the fluorescent wheel 04, and is used to combine and output the second laser 022 and the fluorescent 041. .

The inventor of the present application has discovered through research that: in the above-mentioned fluorescence conversion system, the optical axis of the first laser 021 coincides with the optical axis of the fluorescence 041. Due to the high energy density of the first laser 021, the first laser 021 passes through After the lens assembly 03, the lens assembly 03 absorbs the first laser light 021 at the position where the first laser light 021 passes (especially the optical axis position), and the temperature increases, so that the transmittance of the lens assembly 03 decreases, so that the fluorescence 041 passes through This caused a certain impact and reduced the overall transmittance of fluorescence.

Summary of the invention

The embodiments of the present application provide a laser projection light source and a laser projection device, which are used to solve the problem of low overall fluorescence transmittance of the lens assembly located on the front side of the fluorescent wheel in the laser projection light source of the related art.

In order to achieve the above objective, in the first aspect, the embodiments of the present application provide a laser projection light source, including a housing, a laser carried on the housing and used for emitting a first laser, and a laser that is all arranged in the housing. The light combining assembly, the first lens assembly and the fluorescent wheel in the body, the first lens assembly and the fluorescent wheel are all arranged on the optical path of the first laser, and the first lens assembly is located close to the fluorescent wheel One side of the laser; the fluorescent wheel has a fluorescent reflection area, the fluorescent reflection area is used to reflect the fluorescence generated by the excitation of the first laser to the light combining component; the first lens component is located at the The optical path of the fluorescence; the light combining component is located on the optical path of the second laser formed after the first laser irradiates the fluorescent wheel, and is used to combine the second laser with the fluorescence and output The optical axis of the first lens assembly and the optical axis of the first laser are not coaxially arranged, so that the optical axis of the first laser and the optical axis of the fluorescence are in phase on the first lens assembly stagger.

In the second aspect, the embodiments of the present application provide a laser projection device, including an opto-mechanical component, a projection lens, and the laser projection light source described in the first aspect; the light combining component of the laser projection light source is used to combine the second The illuminating beam formed by combining the laser and the fluorescent light is output to the opto-mechanical assembly; the opto-mechanical assembly is used to modulate the illuminating beam to form a projection beam, and the projection beam is transmitted through the projection lens Project out.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is a light path diagram of a fluorescence conversion system of a laser projection light source in the related art;

2 is a light path diagram of a fluorescence conversion system of a laser projection light source in some embodiments of the application;

3 is a light path diagram of a fluorescence conversion system of a laser projection light source in some other embodiments of the application;

4 is a schematic structural diagram of the laser projection light source in an embodiment of the application after the top cover of the housing is removed;

5 is a schematic structural view of the laser projection light source of FIG. 4 after the dichroic film and the color film fixing seat are removed;

Fig. 6 is an exploded view of the structure of the laser projection light source in Fig. 5;

Fig. 7 is a schematic structural view of the laser projection light source in Fig. 5 with a part cut off according to the A-A section;

Fig. 8 is a partial exploded view of the lens adjustment seat of the laser projection light source in Fig. 5;

9 is a schematic diagram of the structure of the carrier of the lens adjusting seat in the embodiment of the application;

Figure 10 is a cross-sectional view of the laser projection light source A-A in Figure 5;

Figure 11 is a B-B cross-sectional view of the laser projection light source in Figure 5;

Figure 12 is a C-C cross-sectional view of the laser projection light source in Figure 5;

Figure 13 is a schematic diagram of a partial structure of the fluorescent wheel in some embodiments of the application (the lens holder is fixed to the housing);

Figure 14 is an exploded view of the fluorescent wheel and the fluorescent wheel fixing seat in Figure 13;

Figure 15 is a D-D cross-sectional view of Figure 13;

16 is a schematic diagram of the structure of the fluorescent wheel fixing seat in the embodiment of the application;

17 is a schematic diagram of the structure of the fluorescent wheel fixing seat and the fluorescent wheel assembled together in an embodiment of the application;

18 is a schematic diagram of a partial structure of the dichroic film in some embodiments of the application;

Figure 19 is an exploded view 1 of Figure 18;

Figure 20 is the second exploded view of Figure 18;

Figure 21 is a cross-sectional view of F-F of Figure 18;

Figure 22 is a cross-sectional view of E-E of Figure 18;

FIG. 23 is a schematic diagram of the structure of the color film fixing seat in an embodiment of the application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying The referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

In the description of this application, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; for those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood under specific circumstances.

The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, unless otherwise specified, "plurality" means two or more.

In the first aspect, an embodiment of the present application provides a laser projection light source, as shown in FIG. 3 and FIG. 4, including a housing 200, a laser carried on the housing 200 and used to emit the first laser 11, and both The light combining assembly 2, the first lens assembly 3 and the fluorescent wheel 4 are arranged in the housing 200; the first lens assembly 3 and the fluorescent wheel 4 are arranged on the optical path of the first laser 11, and the first lens assembly 3 is located on the fluorescent wheel 4 The side close to the laser 1; the fluorescent wheel 4 has a fluorescent reflective area 41 (shown in Figure 4), which is used to reflect the fluorescent light 42 (shown by the dotted line in Figure 3) generated by the excitation of the first laser 11 to The light combining component 2; the first lens component 3 is located on the optical path of the fluorescent 42; the light combining component 2 is located on the optical path of the second laser 12 formed after the first laser 11 irradiates the fluorescent wheel 4, and is used to transfer the second laser 12 combines light with the fluorescent light 42 and outputs; the optical axis of the first lens assembly 3 (a-axis shown in Fig. 3) and the optical axis of the first laser 11 (b-axis shown in Fig. 3) are arranged on different axes, In order to make the optical axis of the first laser 11 and the optical axis of the fluorescent light 42 (a axis shown in FIG. 3) deviate on the first lens assembly 3.

Wherein, the laser 11 may be arranged in the housing 200 or on the housing wall of the housing 200, which is not specifically limited here.

In the laser projection light source provided by the embodiment of the present application, the optical axis of the first lens assembly 3 and the optical axis of the first laser 11 are not coaxially arranged, so that the optical axis of the first laser 11 and the optical axis of the phosphor 42 are in the first The lens assembly 3 is staggered so that the high energy density laser located at the optical axis of the first laser 11 and the fluorescent 42 located at the optical axis of the phosphor 42 can be prevented from overlapping on the first lens assembly 3, so that the first lens assembly 3 can be avoided. The high temperature of the lens assembly 3 at the optical axis of the first laser 11 reduces the transmittance of the high-energy density fluorescent 42 at the optical axis of the fluorescent 42, thereby helping to increase the overall transmittance of the fluorescent 42 of the first lens assembly 3 rate.

In the above embodiment, the optical path of the second laser 12 is not unique. For example, the optical path of the second laser 12 may be the optical path formed by the fluorescent wheel 4 reflecting the first laser 11, as shown in FIGS. 3 and 4. The fluorescent wheel 4 has a laser reflection area 43, which is used to reflect the first laser 11 to form the second laser 12; the first lens assembly 3 is located on the optical path of the fluorescent 42 and the second laser 12; the first lens The optical axis of the component 3 (a-axis shown in FIG. 3) and the optical axis of the first laser 11 (b-axis shown in FIG. 3) are set off-axis, so that the optical axis of the first laser 11 and the second The optical axis of the laser 12 (c-axis shown in Fig. 3) and the optical axis of the fluorescent 42 (a-axis shown in Fig. 3) are staggered in two phases on the first lens assembly 3, that is: in the first lens On the component 3, the optical axis of the first laser 11 is offset from the optical axis of the second laser 12, the optical axis of the first laser 11 is offset from the optical axis of the fluorescent 42, and the optical axis of the second laser 12 is offset from the optical axis of the fluorescent 42 To prevent the optical axis of the first laser 11 from overlapping the optical axis of the second laser 12 and the optical axis of the fluorescent 42 on the first lens assembly 3, so as to affect the transmittance of the second laser 12 and the fluorescent 42.

In addition, the optical path of the second laser 12 can also be the optical path formed after the first laser 11 transmits the fluorescence 42. Specifically, as shown in FIG. 2, the fluorescent wheel 4 has a laser transmission area, which is used to make the first laser 11 The fluorescent wheel 4 is transmitted to form the second laser light 12; the fluorescence conversion system 100 further includes a light path conversion component 5, which is used to transmit the second laser light 12 to the light combining assembly 2 to combine light with the fluorescent light 42 . The optical path conversion component 5 includes a plurality of optical path conversion lenses 51 and a plurality of relay lenses 52, and each of the optical path conversion lenses 51 and the relay lens 52 is located on the optical path of the second laser light 12. Compared with the embodiment shown in FIG. 2, in the embodiment shown in FIG. 3, since the fluorescence 42 and the second laser 12 are both emitted along the front surface of the fluorescence wheel 4, the light combining assembly 2 can be used directly from the fluorescence wheel 4 The reflected fluorescence 42 and the second laser light 12 collect and combine the light, and there is no need to provide the optical path conversion component 5 to guide the second laser 12 to the light combining assembly 2, thereby simplifying the structure of the laser projection light source and contributing to the overall size reduction , Can realize the miniaturization of the laser projection light source.

The composition of the first lens assembly 3 is not unique. For example, as shown in FIG. 3, the first lens assembly 3 may include a first convex lens 31 and a second convex lens 32 that are coaxially arranged. The second convex lens 32 is located between the first convex lens 31 and the fluorescent lens. Between rounds 4. Wherein, the first convex lens 31 may be an aspherical convex lens, and the second convex lens 32 may be a spherical convex lens. In addition, the first lens assembly 3 may also be an aspheric convex lens. Compared with setting an aspherical convex lens, setting the first convex lens 31 and the second convex lens 32 can better collect the fluorescent light 42 with a larger divergence angle; at the same time, setting the first convex lens 31 and the second convex lens 32 has lower processing requirements. It is beneficial to reduce costs (setting aspheric convex lens requires designing optical parameters that can receive a large divergence angle and can collimate the fluorescent beam, so that the curvature of the aspheric surface is required, the design and processing are more difficult, and the cost is higher).

As shown in FIG. 3, the distance between the optical axis of the first lens assembly 3 and the optical axis of the first laser 11 located upstream of the first lens assembly 3 (that is, the light incident side of the first lens assembly 3) is D, The axial dimension of the first convex lens 31 is H;

Among them, D should not be too large or too small. If D is too large, the first laser 11 will be irradiated close to the edge area of the first convex lens 31 and the second convex lens 32, because it is plated on the first convex lens 31 and the second convex lens 32. The thickness of the antireflection coating on the upper part is thicker in the middle and thinner on the edges. The first laser 11 passes through the edge area where the coating thickness is thinner, which is not conducive to the increase in the transmittance of the first laser 11; if D is too small, then the first laser 11 The distance between the optical axis of a laser 11 and the optical axis of the fluorescent light 42 is relatively close, that is, the area on the first lens assembly 3 corresponding to the optical axis of the first laser light 11 is relatively close to the area corresponding to the optical axis of the fluorescent light 42. When the temperature of the area on the first lens assembly 3 corresponding to the optical axis of the first laser 11 rises due to the irradiation of the first laser 11, it is easy to affect the temperature of the area on the first lens assembly 3 corresponding to the optical axis of the fluorescent light 42. Furthermore, it is not conducive to further improvement of the overall transmittance of the fluorescent light 42. It is found through research that when D and H are satisfied: D=(0.3～0.7)H, it can ensure that the first laser 11 passes through the area with a thicker coating thickness, so as to increase the transmittance of the first laser 11. It is avoided that the distance between the optical axis of the first laser 11 and the optical axis of the fluorescent light 42 is too close, so that the overall transmittance of the fluorescent light 42 can be further improved.

After further research, it is found that when D=(0.3-0.5)H, the transmittance of the first laser 11 can be further increased, and the overall transmittance of the fluorescent light 42 can be further increased.

In order to achieve the purpose of efficiently exciting the fluorescence 42 and reduce the light loss of the first laser 11 during the transmission process, as shown in FIG. 3, the laser projection light source further includes a second lens assembly 6 located between the laser 1 and the first lens assembly 3. , The second lens assembly 6 is located on the optical path of the first laser 11 and between the laser 1 and the first lens assembly 3. In this way, after the first laser 11 is emitted by the laser 1, it is reduced by the second lens assembly 6 to form a smaller spot and then incident on the surface of the phosphor wheel 4. This not only reduces the light loss of the first laser 11 during transmission, but also It is also beneficial to increase the energy density of the first laser 11 to increase the excitation efficiency of the fluorescence 42.

Among them, the composition of the second lens assembly 6 is not unique, for example, it may be the following composition: As shown in FIG. 3, the second lens assembly 6 includes a third convex lens 61, a concave lens 62 and a fly-eye lens 63 which are coaxially arranged, and are arranged along the first In the emission direction of the laser light 11, the third convex lens 61, the concave lens 62 and the fly eye lens 63 are sequentially arranged on the optical path of the first laser light 11. In addition, it may also be composed as follows: the second lens assembly 6 includes a third convex lens 61 and a concave lens 62 coaxially arranged, and along the emission direction of the first laser 11, the third convex lens 61 and the concave lens 62 are sequentially arranged on the first laser 11 On the light path. When the second lens assembly 6 includes a fly-eye lens 63, the fly-eye lens 63 is formed by a combination of a series of small lenses. When the first laser 11 passes through the fly-eye lens 63, the uniformity and brightness of the first laser 11 are improved.

In order to facilitate the output of the second laser 12 and the fluorescence 42 after the combined light, as shown in FIG. 2, the laser projection light source further includes a light receiving part located on the optical path of the second laser 12 and the fluorescence 42, the light receiving part is located in the combined light. The downstream of the light assembly 2 includes a fourth convex transparent lens 7 and a light collecting rod 8. The fourth convex transparent lens 7 is located between the light combining assembly 2 and the light collecting rod 8, and is used to combine the second laser light 12. The fluorescent light 42 is converged to the light receiving rod 8 and output.

In the actual production and manufacture of the laser projection light source, due to processing errors and installation errors, the optical axis of the first lens assembly 3 and the preset position of the fluorescent reflection area 41 of the fluorescent wheel 4 are likely to deviate, so that the first The laser light 11 irradiates the light spot of the fluorescent reflection area 41 of the fluorescent wheel 4 easily to deviate from the preset position, which is not conducive to the efficient excitation of the fluorescent light 42. In order to solve this problem, as shown in FIGS. 5 and 6, the laser projection light source further includes a lens holder 310. The first lens assembly 3 is disposed on the lens holder 310. The lens holder 310 is located in the housing 200 along the edge In a direction perpendicular to the optical axis of the first lens assembly 3, the position of the lens holder 310 relative to the housing 200 can be adjusted. When the spot of the first laser 11 irradiated to the fluorescent reflection area 41 deviates from the preset position, adjust the position of the lens holder 310 relative to the housing 200 along the direction perpendicular to the optical axis of the first lens assembly 3, so that the first lens The optical axis of the component 3 coincides with the preset position of the fluorescent reflection area 41 of the fluorescent wheel 4, so that the first laser 11 is irradiated to the preset position of the fluorescent reflection area 41 to ensure efficient excitation of the fluorescence 42.

When the first lens assembly 3 includes a first convex lens 31 and a second convex lens 32, as shown in FIG. 6, a lens mounting hole 311 is opened on the lens fixing seat 310, and the first convex lens 31 is fixed to the lens by the first mounting structure 312. In the hole 311, the second convex lens 32 is fixed in the lens mounting hole 311 through the second mounting structure 313;

As shown in FIG. 6, the first mounting structure 312 includes a first mounting fastener 3121 (for example, a screw), a pressing ring 3122, a first fixing elastic piece 3123, and a first step surface 3124 disposed in the lens mounting hole 311, The edge of the first convex lens 31 abuts against the first step surface 3124, the first fixing elastic piece 3123 and the pressing ring 3122 are sleeved on the first convex lens 31, and the pressing ring 3122 is located between the first fixing elastic piece 3123 and the first step surface 3124 In between, the first fixing elastic piece 3123 is connected to the first step surface 3124 through the first mounting fastener 3121 to fix the first convex lens 31 in the lens mounting hole 311;

As shown in FIG. 6, the second mounting structure 313 includes a second mounting fastener 3131 (for example, a screw), a second fixing elastic piece 3132, and a second stepped surface 3133 arranged in the lens mounting hole 311, and the second convex lens 32 The edge of the second stepped surface 3133 abuts, the second fixed elastic piece 3132 is sleeved on the first convex lens 31, and the second fixed elastic piece 3132 is connected to the second stepped surface 3133 through the second mounting fastener 3131 to connect the second The convex lens 32 is fixed in the lens mounting hole 311.

The adjustment structure of the lens fixing seat 310 may be as follows: as shown in FIG. 7, the laser projection light source further includes a lens adjustment seat 320 located in the housing 200, and the lens adjustment seat 320 includes a seat body 321 and is arranged on the seat body 321 The carrier 322; the carrier 322 is connected to the base 321 through the first adjustment structure 330, so that the position of the carrier 322 relative to the base 321 in the first direction X can be adjusted, the first direction X is perpendicular to the first lens One direction of the optical axis of the assembly 3; the lens holder 310 is carried by the carrier 322, and is connected to the carrier 322 through the second adjustment structure 340, so that the lens holder 310 can oppose the carrier 322 along the second direction Y The position of is adjustable, and the second direction Y is a direction perpendicular to the optical axis of the first lens assembly 3 and the first direction X.

During adjustment, the second adjustment structure 340 can adjust the position of the lens holder 310 relative to the housing 200 in the second direction Y, and the first adjustment structure 330 can adjust the position of the carrier 322 relative to the housing 200, thereby driving the adjustment. The position of the lens holder 310 relative to the housing 200 in the first direction X. By adjusting the position of the lens holder 310 relative to the housing 200 in two directions (ie, the first direction X and the second direction Y), the adjustment efficiency and accuracy of adjusting the lens holder 310 are greatly improved, and the second The optical axis of a lens assembly 3 more accurately coincides with the preset position of the fluorescent reflection area 41 of the fluorescent wheel 4. At the same time, since the seat body 321 of the lens adjustment seat 320 and the carrier 322 are both inside the housing 200, during adjustment, the housing 200 can be opened for adjustment without changing the placement position of the housing 200 (if the adjustment structure is set On the wall of the housing 200 where the lens holder 310 is located, for example, on the bottom wall of the housing 200 shown in FIG. 7, the housing 200 needs to be turned over during adjustment, which makes the adjustment inconvenient), thereby greatly facilitating the lens holder 310 The position adjustment.

Wherein, the first adjustment structure 330 is not unique. For example, the first adjustment structure 330 may be as follows: As shown in FIGS. 8 and 10, the first adjustment structure 330 includes: a first threaded hole opened on the base 321 331; a first waist-shaped hole 332 opened on the carrier 322, the length of the first waist-shaped hole 332 is parallel to the first direction X; a first fastener 333 with a rod and a head (for example, a screw ), the rod of the first fastener 333 passes through the first waist-shaped hole 332 and is connected to the first threaded hole 331. When adjusting, loosen the first fastener 333 (for example, only screw the first fastener 333 into the first threaded hole 3312 or so), and then adjust the carrier 322 in the first direction X to reach the first direction After adjusting the preset position on X, the first fastener 333 is tightened to lock the carrier 322 on the base 321.

In addition, the first adjustment structure 330 may also be as described below: the first adjustment structure 330 includes: a first adjustment screw rotatably arranged on the base 321, the first adjustment screw extending in the first direction X; The first adjusting nut on the supporting member 322; the first adjusting nut is sleeved on the first adjusting screw. During adjustment, the first adjustment screw is rotated, and the first adjustment nut drives the carrier 322 to move in the first direction X, and stops rotating the first adjustment screw after reaching a preset position in the first direction X. Compared with the embodiment in which the first adjustment structure 330 includes the first adjustment screw and the first adjustment nut, in the embodiment in which the first adjustment structure 330 includes the first fastener 333, there is no need to use an expensive screw, which is beneficial to The manufacturing cost is reduced; at the same time, after the adjustment is completed, the fastener is locked to the seat body 321 to prevent the carrier 322 from moving in the first direction X, so as to ensure the adjustment accuracy.

During the adjustment process of the carrier 322 in the first direction X, in order to make the carrier 322 move more smoothly, as shown in FIGS. 9 and 10, the first adjustment structure 330 further includes: Guide post 3211; a second waist-shaped hole 3221 opened on the carrier 322, the length direction of the second waist-shaped hole 3221 is parallel to the first direction X; the first guide post 3211 and the second waist-shaped hole 3221 are in sliding fit. During the adjustment of the supporting member 322 in the first direction X, the first guide post 3211 slides along the second waist-shaped hole 3221 to guide the supporting member 322 so that the supporting member 322 moves more smoothly.

As shown in FIG. 10, the number of the second waist-shaped holes 3221 can be two, the two second waist-shaped holes 3221 are opened on the carrier 322 along the first direction X, and the number of the first guide posts 3211 can be two. , The two first guide posts 3211 are both disposed on the lens fixing base 310, and each first guide post 3211 is slidingly fitted with the corresponding second waist-shaped hole 3221.

Of course, the positions of the first guide post 3211 and the second waist-shaped hole 3221 can also be adjusted mutually, that is, the first guide post 3211 is disposed on the carrier 322, and the second waist-shaped hole 3221 is opened on the seat body 321. The positions of the first guide post 3211 and the second waist-shaped hole 3221 are the same as those obtained before the swapping, which will not be repeated here.

The second adjusting structure 340 is also not unique. For example, the second adjusting structure 340 may be as follows: As shown in FIGS. 8 and 10, the second adjusting structure 340 includes: a through hole 341 opened on the carrier 322; A second threaded hole 342 on the lens holder 310; a second fastener 343 having a stem and a head, the stem of the second fastener 343 passes through the through hole 341 and is connected to the second threaded hole 342; The elastic member 344 between the supporting member 322 and the lens fixing base 310 is used to apply an elastic force to the lens fixing base 310 along the second direction Y and away from the supporting member 322. The elastic force can keep the head of the second fastener 343 and the edge of the through hole 341 from being clamped, and prevent the second fastener 343 from moving in the axial direction and affecting the adjustment of the lens holder 310 in the second direction Y. . During adjustment, the second fastener 343 is screwed to make the lens holder 310 move relative to the second fastener 343 to a preset position in the second direction Y. After the adjustment is completed, in order to improve the stability of the first fastener 333 and the second fastener 343, the first fastener 333 and the second fastener 343 can be fixed by dispensing glue.

In addition, the second adjustment structure 340 may also be the following: the second adjustment structure 340 includes: a second adjustment screw rotatably arranged on the carrier 322, the second adjustment screw extending in the second direction Y; The second adjusting nut on the lens fixing base 310; the second adjusting nut is sleeved on the second adjusting screw. During adjustment, the second adjusting screw is rotated, and the second adjusting nut drives the lens holder 310 to move in the second direction Y, and stops rotating the second adjusting screw after reaching a preset position in the second direction Y. Compared with the embodiment in which the second adjustment structure 340 includes a second adjustment screw and a second adjustment nut, in the embodiment in which the second adjustment structure 340 includes the second fastener 343 and the elastic member 344, there is no need to use an expensive screw. , Thereby helping to reduce manufacturing costs.

In the embodiment where the second adjusting structure 340 includes the second fastener 343 and the elastic member 344, the elastic member 344 may be a spring, or an elastic piece, etc., which is not specifically limited herein.

When the elastic member 344 is a spring, in order to facilitate the installation of the spring, as shown in FIG. 10, the lens holder 310 has a mounting post 314, the second threaded hole 342 is opened on the mounting post 314, and the spring is sleeved on the mounting post 314, And one end abuts against the carrier 322, and the other end abuts against the lens holder 310. The spring is sleeved on the mounting post 314, which facilitates the installation and positioning of the spring and ensures the stability of the spring during the compression process.

In the second adjusting structure 340, as shown in FIG. 10, the number of the through holes 341 is two, and they are opened on the carrier 322 at intervals along the first direction X, and the number of the second threaded holes 342 is two, two The second threaded holes 342 are all opened on the lens fixing seat 310, the number of the second fasteners 343 is two, and each second fastener 343 passes through the corresponding through hole 341, and the corresponding second threaded hole 342 connections.

During the adjustment of the lens holder 310 in the second direction Y, in order to make the lens holder 310 move more smoothly, as shown in FIG. 10, the second adjustment structure 340 further includes: a second lens holder 310 disposed on the lens holder 310. Guide post 345; a guide hole 346 opened on the carrier 322, the guide hole 346 extends along the second direction Y; the second guide post 345 and the guide hole 346 sliding fit. During the adjustment of the lens holder 310 in the second direction Y, the second guide post 345 slides along the guide hole 346 to guide the lens holder 310 so that the lens holder 310 moves more smoothly.

Of course, the positions of the second guide post 345 and the guide hole 346 can also be adjusted mutually, that is, the second guide post 345 is disposed on the carrier 322 and the guide hole 346 is opened on the lens fixing base 310. The position of the second guide post 345 and the guide hole 346 after the adjustment has the same technical effect as before the adjustment, and will not be repeated here.

In order to better maintain the balance of the lens holder 310 in the first direction X, as shown in FIGS. 8 and 10, the base body 321 includes two sub-base bodies 3212 spaced apart along the first direction X, and the bearing members 322 are located at two The tops of the two sub-bases 3212 are connected to the two sub-bases 3212 through the first adjusting structure 330, the lens fixing base 310 is disposed between the two sub-bases 3212, and the top is opposite to the carrier 322 through the second adjusting structure 340 connection. Since the supporting member 322 is connected to the two sub-bases 3212 through the first adjusting structure 330, the supporting member 322 can maintain a better balance in the first direction X, so that the lens holder 310 is in the first direction X. Keep a better balance. At the same time, the lens fixing seat 310 is arranged between the two sub-mount bodies 3212 to make the layout of the lens fixing seat 310 and the lens adjusting seat 320 more compact, which is beneficial to reduce the occupation of the space in the housing 200.

Wherein, the top of the sub-base 3212 specifically refers to the end of the sub-base 3212 away from the housing wall (the bottom wall 210 of the housing 200 shown in FIG. 7) provided on the sub-base 3212, for example, as shown in FIG. The upper part of the sub-mount 3212 is shown; the top of the lens fixing seat 310 refers to the end of the lens fixing seat 310 away from the housing wall where the sub-mounting body 3212 is provided, such as the upper part of the lens fixing seat 310 shown in FIG. 7.

In order to ensure the accuracy of adjustment, as shown in FIG. 10, the fitting gap g1 between the second guide post 345 and the guide hole 346 ranges from 0.03 mm to 0.05 mm. As shown in Figure 10, the value of the gap g2 between the carrier 322 and the lens holder 310 needs to be designed according to the actual adjustment requirements, and the designed value needs to be 0.1mm larger than the preset adjustment value to absorb certain adjustments. tolerance;

As shown in FIGS. 10 and 12, the value of the gap value g3 between one of the first guide posts 3211 (for example, the first guide post 3211 on the right side shown in Fig. 10) and the matched second waist-shaped hole 3221 To set according to the actual adjustment requirements in the first direction X, g3 needs to be 0.1mm larger than the required adjustment value to absorb a certain adjustment tolerance; another first guide post 3211 (such as the left side shown in Figure 10 The gap value g4 between the first guide post 3211) and the matched second waist-shaped hole 3221 is 0.1mm larger than g3, that is, g4=g3+0.1mm, which can better absorb the adjustment tolerance; such as As shown in FIG. 10, the value of the gap value g5 between the carrier 322 and the bottom plane of the mounting post 314 should consider not only the adjustment requirement value of the lens holder 310 in the second direction Y, but also the compression pole of the elastic member 344. value.

As shown in FIG. 11, the figure shows a schematic diagram of the cooperation between the first guide post 3211 and the second waist-shaped hole 3221 along the axial direction of the first lens assembly 3. The first guide post 3211 and the second waist-shaped hole 3211 The size range of the fit gap g1 between the holes 3221 is 0.03 mm to 0.05 mm.

In the actual production and manufacturing of the laser projection light source, along the axial direction of the fluorescent wheel 4, the distance between the first lens assembly 3 and the fluorescent wheel 4 and the preset distance usually have an error, so that the first laser 11 is irradiated to There is a deviation between the light spot of the fluorescent reflection area 41 of the fluorescent wheel 4 and the preset size, which is not conducive to the efficient excitation of the fluorescent 42. In order to solve this problem, as shown in FIG. 13 and FIG. 14, the laser projection light source also includes fluorescent light. Wheel fixing seat 410, the fluorescent wheel 4 is arranged on the fluorescent wheel fixing seat 410, the fluorescent wheel fixing seat 410 is located in the housing 200, and along the axial direction of the fluorescent wheel 4, the position of the fluorescent wheel fixing seat 410 relative to the housing 200 is adjustable . When the distance between the fluorescent wheel 4 and the first lens assembly 3 deviates from the preset distance, adjust the position of the fluorescent wheel fixing seat 410 relative to the housing 200 along the axial direction of the fluorescent wheel 4, so that the fluorescent wheel 4 and the first lens assembly The distance between a lens assembly 3 reaches a preset distance, so that the first laser 11 irradiates the light plate of the fluorescent reflection area 41 to meet the requirements, so as to ensure the efficient excitation of the fluorescent light 42.

Wherein, as shown in FIGS. 14 and 15, the fluorescent wheel 4 is connected to the fluorescent wheel fixing base 410 through fluorescent wheel fixing fasteners 420 (such as screws). Specifically, the fluorescent wheel fixing base 410 is provided with a mounting through hole 411, The fluorescent wheel fixing fastener 420 is connected to the fluorescent wheel 4 through the installation through hole 411. In order to improve the stability of the fluorescent wheel 4, after the fluorescent wheel fixing fastener 420 is connected to the fluorescent wheel fixing seat 410, the fluorescent wheel fixing fastener 420 can be glued and fixed.

Figure 13 shows an embodiment in which the lens holder 310 is fixedly connected to the housing 200, and the position of the fluorescent wheel holder 410 relative to the housing 200 along the axis of the fluorescent wheel 4 can be adjusted. Of course, the fluorescent wheel can also be adjusted. The wheel mount 410 is fixed to the housing 200. Along the axis of the fluorescent wheel 4, the position of the lens mount 310 relative to the housing 200 can be adjusted; it can also be set as follows: along the axis of the fluorescent wheel 4, the lens mount 310 is opposite to the housing The position of the body 200 and the position of the fluorescent wheel fixing seat 410 relative to the housing 200 can be adjusted, so that the purpose of adjusting the distance between the first lens assembly 3 and the fluorescent wheel 4 can also be achieved.

The adjustment structure of the fluorescent wheel fixing seat 410 may be as follows: as shown in FIGS. 14 and 15, the laser projection light source further includes a fluorescent wheel adjusting seat 430 located in the housing 200, and the fluorescent wheel fixing seat 410 adopts an axial adjustment structure. 440 is connected to the fluorescent wheel adjusting seat 430 so that the fluorescent wheel fixing seat 410 can be adjusted relative to the fluorescent wheel adjusting seat 430 in the axial direction of the fluorescent wheel 4. Since the fluorescent wheel fixing seat 410 and the fluorescent wheel adjusting seat 430 are both in the housing 200, during adjustment, the housing 200 can be adjusted through the axial adjustment structure 440 when the housing 200 is opened, and there is no need to change the placement position of the housing 200 (if you The adjustment structure is arranged on the wall of the housing 200 where the fluorescent wheel fixing seat 410 is located, for example, on the bottom wall of the housing 200 shown in FIG. 14. When adjusting, the housing 200 needs to be turned over, which makes the adjustment inconvenient), which is greatly convenient The position of the fluorescent wheel fixing seat 410 is adjusted.

Wherein, the axial adjustment structure 440 is not unique. For example, the axial adjustment structure 440 may be as follows: As shown in FIG. 14 and FIG. 15, the axial adjustment structure 440 includes: an axial adjustment provided on the fluorescent wheel adjustment seat 430 Adjusting threaded hole 441; an axial adjustment waist-shaped hole 442 opened on the fluorescent wheel fixing seat 410, the length of the axial adjustment waist-shaped hole 442 is parallel to the axial direction of the fluorescent wheel 4; an axial direction with a rod and a head Adjust the fastener 443, the rod of the axial adjustment fastener 443 passes through the axial adjustment waist-shaped hole 442, and is connected with the axial adjustment threaded hole 441. When adjusting, loosen the axial adjustment fastener 443, then turn on the laser 1, observe the light path of the first laser 11 and the size of the light spot irradiated on the fluorescent wheel 4, and then adjust the position of the fluorescent wheel fixing seat 410 relative to the housing 200 Position, when the light path of the first laser 11 and the light spot irradiated on the fluorescent wheel 4 meet the requirements, the adjustment is completed, and then the axial adjustment fastener 443 is tightened to lock the fluorescent wheel fixing seat 410 to the fluorescent wheel adjusting seat 430 on. In order to ensure the stability of the fluorescent wheel fixing seat 410 after adjustment, the axial adjustment fastener 443 can be glued and fixed.

In addition, the axial adjustment structure 440 may also be as described below: the axial adjustment structure 440 includes: a third adjustment screw rotatably disposed on the fluorescent wheel adjustment seat 430, and the third adjustment screw is along the axial direction of the fluorescent wheel 4 Extension; fixedly arranged on the third adjusting nut on the fluorescent wheel fixing seat 410; the third adjusting nut is sleeved on the third adjusting screw. When adjusting, turn on the laser 1, observe the light path of the first laser 11 and the size of the light spot irradiated on the fluorescent wheel 4, and then rotate the third adjusting screw, the third adjusting nut drives the fluorescent wheel fixing seat 410 along the fluorescent wheel 4 Axial movement, when the light path of the first laser 11 and the light spot irradiated on the fluorescent wheel 4 meet the requirements, stop rotating the third adjusting screw, and the adjustment ends. Compared with the embodiment in which the axial adjustment structure 440 includes the third adjustment screw and the third adjustment nut, in the embodiment in which the third adjustment structure includes the axial adjustment fastener 443, there is no need to use an expensive screw, which is beneficial to The manufacturing cost is reduced; at the same time, after the adjustment is completed, the fluorescent wheel fixing seat 410 can be prevented from moving in the axial direction of the fluorescent wheel 4 by the fasteners and the fluorescent wheel adjusting seat 430 to ensure the adjustment accuracy.

During the adjustment of the fluorescent wheel fixing seat 410 along the axial direction of the fluorescent wheel 4, in order to make the fluorescent wheel fixing seat 410 move more smoothly, as shown in FIG. 15, the axial adjustment structure 440 further includes: The guiding post 444 on the 430; the long guiding hole 445 opened on the fluorescent wheel fixing seat 410, the length of the guiding long hole 445 is parallel to the axial direction of the fluorescent wheel 4; the guiding post 444 is slidingly fitted with the guiding long hole 445. During the adjustment process of the fluorescent wheel fixing seat 410 along the axial direction of the fluorescent wheel 4, the guide post 444 slides along the guide long hole 445 to guide the fluorescent wheel fixing seat 410, so that the fluorescent wheel fixing seat 410 moves more stably .

Of course, the positioning positions of the guiding post 444 and the long guiding hole 445 can also be adjusted mutually, that is, the guiding post 444 is disposed on the fluorescent wheel fixing seat 410, and the guiding long hole 445 is opened on the fluorescent wheel adjusting seat 430. The position of the guide post 444 and the long guide hole 445 after the exchange has the same technical effect as before the exchange, and will not be repeated here.

In order to facilitate the adjustment of the fluorescent wheel fixing seat 410, as shown in Figure 16, the fluorescent wheel fixing seat 410 is also provided with a fluorescent wheel adjusting handle 412. During adjustment, the operator can adjust the fluorescent wheel fixing by grasping the fluorescent wheel adjusting handle 412 The seat 410 makes the adjustment of the fluorescent wheel fixing seat 410 more convenient.

In order to avoid the high temperature of the fluorescent wheel 4 in the actual working process, as shown in FIG. 17, the laser projection light source further includes a temperature sensor 450. The temperature sensor 450 is arranged on the fluorescent wheel fixing seat 410 and is used to detect the temperature of the fluorescent wheel 4 temperature. In this way, the temperature sensor 450 can feed back the temperature of the fluorescent wheel 4 to the control system. When the temperature of the fluorescent wheel 4 is too high, the control system can take corresponding actions, such as turning off the laser 1, to prevent the temperature of the fluorescent wheel 4 from being too high. , Thereby prolonging the service life of the fluorescent wheel 4.

In order to maintain a better balance of the fluorescent wheel fixing seat 410 in the first direction X, as shown in FIG. 15, the fluorescent wheel adjusting seat 430 includes two sub-adjusting seats 431 spaced apart along the first direction X. The first direction X is A direction perpendicular to the axial direction of the fluorescent wheel 4 and the height direction of the fluorescent wheel fixing seat 410; the fluorescent wheel fixing seat 410 includes a fixed seat body 413 and an adjusting member 414 fixed on the top of the fixed seat body 413. The fluorescent wheel 4 is arranged in On the fixed seat body 413; the fixed seat body 413 is disposed between the two sub-adjusting seats 431, and the adjusting member 414 is connected to the two sub-adjusting seats 431 through the axial adjustment structure 440, respectively. Since the adjusting member 414 is respectively connected to the two sub-adjusting seats 431 through the axial adjusting structure 440, the adjusting member 414 can maintain a better balance in the first direction X, so that the fluorescent wheel fixing seat 410 is in the first direction X. To maintain a better balance. At the same time, the fixing base 413 is arranged between the two sub-adjusting bases 431 to make the layout of the fluorescent wheel fixing base 410 and the fluorescent wheel adjusting base 430 more compact, which is beneficial to reduce the occupation of the space in the housing 200.

In order to ensure the accuracy of adjustment, as shown in FIG. 15, the gap value g6 between the guide post 444 and the long guide hole 445 in the first direction X is in the range of 0.03mm-0.05mm; the gap value in the axial direction of the fluorescent wheel 4 It is necessary to add 0.1 mm on the basis of the required adjustment value to better absorb the adjustment tolerance of the fluorescent wheel fixing seat 410 in the axial direction of the fluorescent wheel 4.

In the laser projection light source provided by the embodiment of the present application, the light combining assembly 2 may include components of the dichroic plate 21 or a component including a light combining prism, which is not specifically limited herein.

In the embodiment where the light combining assembly 2 may include the dichroic plate 21, as shown in FIGS. 2 and 3, along the emission direction of the first laser 11, the dichroic plate 21, the first lens assembly 3 and the fluorescent wheel 4 Are arranged in order on the optical path of the first laser 11, that is, the dichroic plate 21 is arranged between the laser 11 and the first lens assembly 3, and is located on the optical path of the first laser 11 and the phosphor 42, specifically, the two-way The color plate 21 is arranged between the second lens assembly 6 and the first lens assembly 3.

In the embodiment in which the light combining assembly 2 includes the dichroic plate 21 and the fluorescent wheel 4 includes the laser reflection area 43, in order to combine and output the second laser light 12 and the fluorescent light 42, as shown in FIG. 3, the light combining assembly 2 It also includes a reflector 22 located on the optical path of the second laser 12, and along the optical path of the second laser 12, the reflector 22 is located on the side of the dichroic plate 21 away from the fluorescent wheel 4, and is used to reflect the second laser 12 To the dichroic plate 21 to combine light with the fluorescent 42. The second laser light 12 passes through the dichroic film 21 and then irradiates the reflecting member 22, and is reflected by the reflecting member 22 to the dichroic film 21 to combine with the fluorescent light 42 and output. By providing the reflector 22, the reflector 22 changes the emission direction of the second laser light 12, so that the emission direction of the second laser light 12 and the emission direction of the fluorescent light 42 are consistent, and the two are combined and output.

In order to make the optical axis of the second laser light 12 after emitting the dichroic plate 21 parallel to the optical axis of the fluorescent light 42, as shown in FIG. 3, the reflector 22 is a reflector plate, and the reflector plate is parallel to the dichroic plate 21. With this arrangement, the included angle between the reflective sheet and the optical axis of the incident second laser light 12, and the included angle between the dichroic sheet 21 and the optical axis of the incident fluorescent light 42 are the same, so that the reflected second laser light 12 and the fluorescent light 42 are the same. The optical axis is parallel to each other, which can prevent the second laser 12 and the fluorescence 42 from being scattered, which is beneficial to the downstream light-receiving parts (such as the condenser lens 7 and the optical rod 8 shown in Figure 3) to collect the second laser 12 and the fluorescence 42 .

In the laser projection light source, the angle between the dichroic plate 21 and the optical axis of the first laser 11 and the pitch angle of the dichroic plate 21 relative to the first wall 210 are two important parameters that directly relate to the dichroic plate 21. Reflect the direction of the fluorescent 42. In the actual manufacturing and production process of the laser projection light source, there are usually errors in the installation and fixing of the dichroic plate 21, so that the angle between the dichroic plate 21 and the optical axis of the first laser 11 is The pitch angle of the dichroic plate 21 relative to the first wall 210 is deviated from the preset value. In order to reduce the influence of this deviation on the direction of the fluorescence 42 reflected by the dichroic plate 21, as shown in FIGS. 18 and 19 The laser projection light source further includes a color film fixing seat 510. The dichroic film 21 is disposed on the color film fixing seat 510. The color film fixing seat 510 is located in the housing 200 and is movably arranged on the first wall 210 of the housing 200 , So that the angle between the dichroic plate 21 and the optical axis of the first laser 11 and the pitch angle of the dichroic plate 21 relative to the first wall 210 can be adjusted. When the aforementioned included angle and pitch angle deviate from the preset value, the relative position between the color film holder 510 and the housing 200 is adjusted to eliminate the deviation between the aforementioned included angle and pitch angle and the preset value. It is ensured that the fluorescence 42 reflected by the dichroic plate 21 is emitted along the preset path.

As shown in FIG. 20, in the embodiment in which the light combining assembly 2 includes the reflector 22, the reflector 22 is also disposed on the color plate fixing seat 510 and is relatively fixed to the dichroic plate 21.

Wherein, as shown in FIG. 20, the dichroic sheet 21 is fixed on the color sheet fixing seat 510 by a color sheet fixing elastic sheet 530 and a color sheet fixing fastener 540 (such as screws).

The adjustment structure of the color film fixing seat 510 may be as follows: as shown in FIGS. 19 and 21, the laser projection light source further includes a color film adjustment seat 520, and the color film adjustment seat 520 is located in the housing 200 and is arranged in the first On the wall 210; the color film fixing seat 510 is rotatably connected to the first wall 210 through the rotating shaft 211; the color film fixing seat 510 is connected to the color film adjusting seat 520 through the rotating adjustment structure 550, so that the color film fixing seat 510 can rotate around the rotating shaft 211 Rotate to adjust the size of the laser incident angle; the color film holder 510 is also connected to the color film adjusting base 520 through the pitch adjustment structure 560, so that the color film holder 510 can pitch relative to the first wall 210 to adjust the pitch angle. . Since the color film fixing seat 510 and the color film adjusting seat 520 are both in the housing 200, during adjustment, the housing 200 can be opened for adjustment without changing the placement position of the housing 200 (if the adjustment structure is set in the color film On the wall of the housing 200 where the fixing seat 510 is located, such as the bottom wall of the housing 200 shown in FIG. 19, the housing 200 needs to be turned over during adjustment, which makes the adjustment inconvenient), which greatly facilitates the mounting of the color chip fixing seat 510 Position adjustment.

Among them, the rotation adjustment structure 550 is not unique. For example, the rotation adjustment structure 550 may be as follows: As shown in FIGS. 19 and 21, the rotation adjustment structure 550 includes: a rotation adjustment threaded hole opened on the color film adjustment seat 520 551; The rotation adjustment waist-shaped hole 552 opened on the color film fixing seat 510, the rotation adjustment threaded hole 551, the rotation adjustment waist-shaped hole 552 have a depth direction parallel to the extension direction of the rotation shaft 211; with a rod and a head The rotation adjustment fastener 553 of the rotation adjustment fastener 553 passes through the rotation adjustment waist-shaped hole 552 and is connected to the rotation adjustment threaded hole 551, and when the color film holder 510 rotates around the rotation axis 211, it rotates along By adjusting the length direction of the waist-shaped hole 552, relative movement can occur between the rod of the rotating adjusting fastener 553 and the rotating and adjusting waist-shaped hole 552. During adjustment, the color plate holder 510 is rotated around the rotation axis 211, and the change of the light path of the fluorescent light 42 is observed. After the light path of the fluorescent light 42 meets the requirements, the adjustment is completed, and then the rotary adjusting fastener 553 is tightened. In order to improve the stability of the rotation adjustment fastener 553, after the adjustment, the rotation adjustment fastener 553 can be glued and fixed.

In addition, the rotation adjustment structure 550 may also be the following: the rotation adjustment structure 550 includes: a motor arranged on the color film adjustment seat 520, and the output shaft of the motor is parallel to the rotation shaft 211; and the output shaft is fixed to the motor The upper wheel; the connecting rod connected between the color film fixing seat 510 and the rotating wheel, the connecting rod and the color film fixing seat 510, the rotating wheel constitute a crank-rocker mechanism. During adjustment, the motor drives the color film holder 510 to swing around the rotating shaft 211 through the rotating wheel and the connecting rod. After the light path of the fluorescent light 42 meets the requirements, the motor stops working and the adjustment ends. Compared with the embodiment in which the rotation adjustment structure 550 includes a motor, a runner, and a connecting rod, the rotation adjustment structure 550 includes an embodiment in which a rotation adjustment fastener 553 is provided, which has fewer parts, a simple structure, and does not require components such as a motor, which is beneficial to reduce costs.

In the process of rotating and adjusting the color film fixing seat 510, in order to make the color film fixing seat 510 rotate more smoothly, as shown in FIGS. 19, 21 and 23, the rotation adjustment structure 550 further includes: set on the color film adjustment seat 520 The rotation adjustment guide post 554 on the upper part; the rotation guide long hole 555 opened on the color chip fixing seat 510; the rotation adjustment guide post 554 and the rotation guide long hole 555 are slidingly fitted. During the rotation adjustment of the color film holder 510, the rotation adjustment guide post 554 slides along the rotation guide long hole 555 to guide the color film holder 510, so that the color film holder 510 rotates more stably around the rotation axis 211 .

Of course, the setting positions of the rotation adjustment guide post 554 and the rotation guide slot 555 can also be adjusted mutually, that is, the rotation adjustment guide post 554 is arranged on the color chip fixing seat 510, and the rotation guide slot 555 is opened in the color chip adjustment seat 520. on. The setting positions of the rotation adjustment guide post 554 and the rotation guide slot 555 after the exchange have the same technical effect as before the exchange, and will not be repeated here.

The pitch adjustment structure 560 is also not unique. For example, the pitch adjustment structure 560 may include the following: as shown in FIGS. 19 and 22, the pitch adjustment structure 560 includes: a pitch adjustment threaded hole 561 and a pitch adjustment threaded hole 561 opened on the color film holder 510 The depth direction is parallel to the extension direction of the rotation axis 211, and along the thickness direction of the dichroic film 21, the pitch adjustment threaded hole 561 is located on one side of the dichroic film 21; the pitch adjustment member 562 (for example, an adjustment screw), pitch The adjusting member 562 is matched with the pitch adjusting threaded hole 561, and one end abuts against the color film adjusting seat 520. When adjusting, rotate the pitch adjusting member 562 to apply a torque to the color chip holder 510 to make the color chip holder 510 pitch relative to the first wall 210, and observe the change of the light path of the fluorescent light 42, until the light path of the fluorescent light 42 meets the requirements After that, the adjustment is over. In order to improve the stability of the pitch adjusting member 562, after the adjustment is completed, the rotary pitch adjusting member 562 can be glued and fixed.

As shown in FIG. 19, when the color film fixing seat 510 is adjusted to rotate around the rotation axis 211, in order to better restrict the movement of the pitch adjustment member 562 relative to the color film adjustment seat 520, the pitch adjustment structure 560 further includes In the limiting slot 563 on the plate adjusting seat 520, one end of the pitch adjusting member 562 extends into the limiting slot 563 and abuts against the bottom of the limiting slot 563. In this way, the limiting slot 563 can lower the movement range of the pitch adjusting member 562 relative to the color film adjusting seat 520.

In addition, the pitch adjustment structure 560 may also be as described below: the pitch adjustment structure 560 includes: a pitch adjustment threaded hole 561 opened on the color film adjustment seat 520, the depth direction of the pitch adjustment threaded hole 561 and the extension direction of the rotating shaft 211 Vertically and along the thickness direction of the dichroic film 21, the pitch adjustment threaded hole 561 is located on one side of the color film holder 510; the pitch adjustment piece 562, the pitch adjustment piece 562 is matched with the pitch adjustment threaded hole 561, and one end is connected to the pitch adjustment threaded hole 561. The color film adjusting seat 520 abuts. When adjusting, rotate the pitch adjusting member 562 to apply a torque to the color chip holder 510 to make the color chip holder 510 pitch relative to the first wall 210, and observe the change of the light path of the fluorescent light 42, until the light path of the fluorescent light 42 meets the requirements After that, the adjustment is over.

In order to ensure that the color film fixing seat 510 can achieve a pitching motion relative to the first wall 210, as shown in FIG. 19, the rotating shaft 211 is provided on the first wall 210, and the color film fixing seat 510 is provided with a rotating hole 511; the rotating shaft 211 It extends into the rotating hole 511, and there is a gap between the rotating shaft 211 and the wall of the rotating hole 511, which can tilt the rotating shaft 211 with respect to the axis of the rotating hole 511. By setting a gap between the rotating shaft 211 and the hole wall of the rotating hole 511, the rotating shaft 211 can be inclined with the axis of the rotating hole 511 to ensure smooth pitch movement of the color film holder 510 relative to the first wall 210 get on.

In addition to the above structure, which can ensure that the color film holder 510 can achieve pitching motion relative to the first wall 210, the area of the first wall 210 where the rotating shaft 211 is located can also be set as an elastic area, so that the rotating shaft 211 can be adjusted during adjustment. Due to the action of the color film fixing seat 510, the elastic area is forced to elastically deform, so that the rotating shaft 211 produces a pitching movement, thereby ensuring that the color film fixing seat 510 can realize a pitching movement relative to the first wall 210.

FIG. 19 shows an embodiment in which the rotating shaft 211 is disposed on the first wall 210, and the color film fixing seat 510 is provided with a rotating hole 511. Of course, the positions of the rotating shaft 211 and the rotating hole 511 can also be adjusted with each other. That is, the rotating shaft 211 is disposed on the color film fixing seat 510, and the first wall 210 is provided with a rotating hole 511.

In order to better maintain the balance during the adjustment process of the color chip fixing seat 510, as shown in FIG. 19, the color chip adjustment seat 520 includes two sub-color chip adjustment seats 521 that are spaced apart; the color chip fixing seat 510 includes The base body 512 of the dichroic film 21 and the base adjusting member 513 fixed on the top of the base body 512, the base body 512 is located between the two sub-color film adjusting seats 521, and the base adjusting member 513 is adjusted by rotating respectively The structure 550 and the pitch adjustment structure 560 are connected to each sub-color plate adjustment seat 521. The top of the base body 512 refers to the end of the base body 512 away from the first wall 210. Since the base adjusting member 513 is connected to the two sub-color plate adjusting seats 521 through the rotation adjusting structure 550 and the pitch adjusting structure 560, the base adjusting member 513 can be better maintained in the arrangement direction of the two sub-color plate adjusting seats 521. Therefore, the color chip fixing seat 510 maintains a better balance in the arrangement direction of the two sub-color chip adjusting seats 521. At the same time, the base body 512 is arranged between the two sub-color plate adjusting seats 521 to make the layout of the color plate fixing seat 510 and the color plate adjusting seat 520 more compact, which is beneficial to reduce the occupation of the space in the housing 200.

In order to facilitate the operator to adjust the angle between the dichroic film 21 and the optical axis of the first laser 11, as shown in FIG. 18, a color film adjustment handle 570 is provided on the color film fixing seat 510, so that the operator can The angle between the dichroic film 21 and the optical axis of the first laser 11 can be conveniently adjusted by the color film adjusting handle 570.

In order to ensure the accuracy of adjustment, as shown in FIG. 21, along the width direction of the rotation guide long hole 555, the range of the gap g7 between the rotation adjustment guide post 554 and the hole wall of the rotation guide long hole 555 is 0.03mm-0.05mm; As shown in Figure 22, along the length direction of the long rotation guide hole 555, the value of the gap g8 between the rotation adjustment guide post 554 and the hole wall of the rotation guide long hole 555 needs to be designed according to the actual rotation adjustment requirements, and the design value needs to be 0.1mm larger than the required adjustment value to better absorb the rotation adjustment tolerance.

In the second aspect, the embodiments of the present application provide a laser projection device, including an opto-mechanical component, a projection lens, and the laser projection light source in the first aspect; the light combining component 2 of the laser projection light source is used to combine the second laser 12 with the fluorescent light. The illuminating beam formed by combining 42 is output to the opto-mechanical component; the opto-mechanical component is used to modulate the illuminating beam to form a projection beam, and project the projection beam through the projection lens. The projection beam is projected on the projection screen by the projection lens to display the projection image on the projection screen.

Among them, the laser projection device may be a device capable of image projection, such as a laser TV and a projector.

The technical problems solved and the technical effects obtained by the laser projection device provided in the embodiments of the present application are the same as the technical problems solved and the technical effects obtained by the laser projection light source in the first aspect, and will not be repeated here.

In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

The above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily conceive of changes or substitutions within the technical scope disclosed in this application, which shall cover Within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A laser projection light source, which is characterized by comprising a housing, a laser carried on the housing and used for emitting a first laser, and a light combining assembly, a first lens assembly, and a fluorescent lamp that are all arranged in the housing. Wheel, the first lens assembly and the fluorescent wheel are both arranged on the optical path of the first laser, and the first lens assembly is located on the side of the fluorescent wheel close to the laser;

The fluorescent wheel has a fluorescent reflective area, and the fluorescent reflective area is used to reflect the fluorescent light generated by the excitation of the first laser to the light combining component;

The first lens assembly is located on the optical path of the fluorescent light;

The light combining component is located on the optical path of the second laser formed after the first laser irradiates the fluorescent wheel, and is used to combine and output the second laser with the fluorescent light;

The optical axis of the first lens assembly and the optical axis of the first laser are not coaxially arranged, so that the optical axis of the first laser and the optical axis of the fluorescence are staggered on the first lens assembly .
The laser projection light source according to claim 1, wherein the first lens assembly comprises a first convex lens and a second convex lens arranged coaxially, and the second convex lens is located between the first convex lens and the fluorescent wheel. between;

Alternatively, the lens assembly is an aspheric convex lens.
The laser projection light source according to claim 2, wherein the distance between the optical axis of the first lens assembly and the optical axis of the first laser located upstream of the first lens assembly is D, so The axial dimension of the first convex lens is H, and the relationship between D and H satisfies: D=(0.3～0.7)H.
The laser projection light source according to claim 3, wherein the laser projection light source further comprises a second lens assembly located between the laser and the first lens assembly, and the second lens assembly includes a coaxial lens assembly. A third convex lens, a concave lens and a fly-eye lens are provided, and along the emission direction of the first laser light, the third convex lens, the concave lens and the fly-eye lens are sequentially arranged on the optical path of the first laser light.
The laser projection light source according to any one of claims 1 to 4, wherein the laser projection light source further comprises a lens holder, the first lens assembly is arranged on the lens holder, and the lens The fixing seat is located in the housing, and along a direction perpendicular to the optical axis of the first lens assembly, the position of the lens fixing seat relative to the housing is adjustable.
The laser projection light source according to claim 5, wherein the laser projection light source further comprises a lens adjustment seat located in the housing, and the lens adjustment seat includes a seat body and a bearing provided on the seat body. Pieces

The carrier is connected to the base through a first adjustment structure, so that the position of the carrier relative to the base can be adjusted in a first direction, the first direction being perpendicular to the first lens One direction of the optical axis of the component;

The lens holder is carried by the carrier, and is connected to the carrier through a second adjustment structure, so that the position of the lens holder relative to the carrier in the second direction can be adjusted, so The second direction is a direction perpendicular to the optical axis of the first lens assembly and the first direction.
The laser projection light source according to claim 6, wherein:

The first adjustment structure includes:

A first threaded hole opened on the seat body;

A first waist-shaped hole opened on the carrier, the length direction of the first waist-shaped hole is parallel to the first direction;

A first fastener having a stem and a head, the stem of the first fastener passes through the first waist-shaped hole and is connected to the first threaded hole.
The laser projection light source according to claim 7, wherein:

The first adjustment structure further includes:

A first guide post provided on one of the seat body and the carrier;

A second waist-shaped hole opened on the other of the seat body and the carrier, and the length direction of the second waist-shaped hole is parallel to the first direction;

The first guide post is in sliding fit with the second waist-shaped hole.
The laser projection light source according to claim 6, wherein:

The second adjustment structure includes:

A through hole opened on the carrier;

A second threaded hole opened on the lens fixing seat;

A second fastener having a stem and a head, the stem of the second fastener passes through the through hole and is connected to the second threaded hole;

An elastic member disposed between the supporting member and the lens holder, and the elastic member is used to apply an elastic force to the lens holder in the second direction and away from the supporting member.
The laser projection light source according to claim 9, wherein the lens holder has a mounting post, the second threaded hole is opened on the mounting post, the elastic member is a spring, and the spring is sleeved On the mounting post, one end abuts against the carrier, and the other end abuts against the lens fixing seat.
The laser projection light source according to claim 9, wherein:

The second adjustment structure further includes:

A second guide post provided on one of the lens holder and the carrier;

A guide hole opened on the other of the lens fixing seat and the carrier, the guide hole extending along the second direction;

The second guide post is in sliding fit with the guide hole.
The laser projection light source according to claim 6, wherein the base body comprises two sub-base bodies spaced apart along the first direction, and the carrier is located on top of the two sub-base bodies, and Are respectively connected to the two sub-bases through the first adjusting structure, the lens fixing base is arranged between the two sub-bases, and the top part is opposite to the carrier through the second adjusting structure. connection.
A laser projection equipment, characterized by comprising an opto-mechanical assembly, a projection lens, and the laser projection light source according to any one of claims 1-12;

The light combining component of the laser projection light source is used to output the illumination beam formed by combining the second laser and the fluorescent light to the opto-mechanical component;

The opto-mechanical component is used for modulating the illumination beam to form a projection beam, and projecting the projection beam through the projection lens.