CN217034494U

CN217034494U - Laser light source system and projection equipment

Info

Publication number: CN217034494U
Application number: CN202220643952.5U
Authority: CN
Inventors: 李巍; 顾晓强
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-07-22
Anticipated expiration: 2032-03-22

Abstract

The utility model discloses a laser light source system and projection equipment, and belongs to the technical field of projection. The laser light source system includes: the device comprises a laser, a light homogenizing assembly, a light combining lens group, a fluorescent assembly and a light outlet. Wherein, even optical assembly includes diffusion cell and first lens, carries out homogenization treatment through this even optical assembly to the laser that the laser instrument provided, can be so that shine to the energy density in each region of the facula of the laser of fluorescence subassembly comparatively even, and the light beam direction light-emitting outlet that the luminance homogeneity that closes optical lens group can be better with fluorescence subassembly provides, so, can be so that the luminance homogeneity of the light beam that laser source system provided is better.

Description

Laser light source system and projection equipment

Technical Field

The utility model relates to the technical field of projection, in particular to a laser light source system and projection equipment.

Background

The laser light source is used as a light source of the projection equipment, and has the characteristics of high brightness, bright color, low energy consumption and long service life, so that the projection equipment has the characteristics of high picture contrast and clear imaging.

A laser light source system comprises a laser, a fluorescent component, a light path component and a light outlet. The light path component is used for guiding laser emitted by the laser to the fluorescent component and guiding light beams provided by the fluorescent component to the light outlet.

However, in the above laser light source system, the energy density of each area of the spot of the laser light irradiated to the fluorescent member is not uniform, resulting in poor uniformity of the brightness of the light beam provided by the laser light source system.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a laser light source system and projection equipment. The technical scheme is as follows:

according to an aspect of the present invention, there is provided a laser light source system including:

the device comprises a laser, a light homogenizing assembly, a light combining lens group, a fluorescent assembly and a light outlet;

the light homogenizing assembly is positioned between the laser and the light combining lens group and comprises a diffusion unit and a first lens, the diffusion unit is positioned on one side of the first lens close to the laser, and the diffusion unit receives the laser provided by the laser and guides the homogenized laser to the first lens so as to transmit the laser to the light combining lens group after penetrating through the first lens;

the light combining lens group is positioned between the fluorescent component and the light homogenizing component, the light outlet is positioned on one side of the light combining lens group facing the fluorescent component, and the light combining lens group guides laser provided by the light homogenizing component to the fluorescent component and guides light beams provided by the fluorescent component to the light outlet.

Optionally, the diffusing unit includes a fly-eye lens having a plurality of microlenses arranged in an array, and the first lens includes a convex lens.

Optionally, the diffusion unit includes a diffusion sheet including a transparent substrate and a diffuser on the transparent substrate, and the first lens includes a convex lens.

Optionally, the light combining group has a light transmitting region and a reflecting region disposed around the light transmitting region.

Optionally, the fluorescent component comprises a fluorescent area and a diffuse reflection area, and the focus of the first lens is located in the center of the light-transmitting area;

the laser light source system further comprises a lens group positioned between the fluorescent component and the light combining lens group, the lens group comprises at least one convex lens, the lens group is used for converging the laser penetrating through the light transmitting area and guiding the laser to the fluorescent area or the diffuse reflection area, the fluorescent area is used for generating fluorescence under the excitation of the received laser and emitting the fluorescence to the lens group, and the diffuse reflection area is used for reflecting the received laser to the lens group.

Optionally, an orthographic projection of the microlens on a first plane perpendicular to an optical axis of the first lens is rectangular;

the laser comprises a plurality of light emitting chips arranged in an array mode, light spots emitted by the light emitting chips and irradiated to the fly eye lens are oval, and the long axis of each light spot is parallel to the long edge of the orthographic projection of the micro lens on the first plane.

Optionally, the laser includes a plurality of light emitting chips arranged in rows and columns, the laser light source system further includes a first reflector group, the first reflector group is located between the light uniformizing assembly and the laser, and a light emitting surface of the laser faces the light uniformizing assembly;

the first reflector group comprises a first reflector unit and a second reflector unit, the second reflector unit is positioned on one side of the first reflector unit far away from the laser, and the plurality of light-emitting chips are divided into two groups of light-emitting chips in the column direction and the row direction;

the first reflector unit comprises a first reflector and a second reflector, the first reflector and the second reflector are arranged along the column direction, the second reflector is positioned on one side, close to the optical axis of the first lens, of the first reflector, the first reflector is used for receiving laser emitted by a group of light-emitting chips in the column direction and guiding the received laser to the second reflector, and the second reflector is used for guiding the received laser out of the first reflector unit;

the second mirror unit comprises a third reflector and a fourth reflector, the third reflector and the fourth reflector are arranged in the row direction, the fourth reflector is located on one side, close to the optical axis of the first lens, of the third reflector, the third reflector is used for receiving laser provided by a group of light emitting chips in the row direction and guiding the received laser to the fourth reflector, and the fourth reflector is used for guiding the received laser to the dodging assembly.

Optionally, the laser includes a plurality of light emitting chips arranged in rows and columns, the laser light source system further includes a second reflecting mirror group, the second reflecting mirror group is located between the light uniformizing assembly and the laser, and an included angle is formed between a light emitting direction of the laser and an optical axis of the first lens;

the second reflector group comprises a third reflector unit and a fourth reflector unit, the third reflector unit is positioned in the light emergent direction of the multiple rows of light-emitting chips, the fourth reflector unit is positioned between the third reflector unit and the light homogenizing assembly, and the light-emitting chips comprise two groups of light-emitting chips arranged along the row direction;

the third reflector unit comprises a fifth reflector for receiving the laser provided by the two groups of light emitting chips arranged along the row direction and reflecting the laser to the fourth reflector unit, the fourth reflector unit comprises a sixth reflector and a seventh reflector, the sixth reflector and the seventh reflector are arranged along the row direction, the seventh reflector is positioned on one side of the sixth reflector close to the optical axis of the first lens, the sixth reflector is used for receiving the laser provided by the group of light emitting chips in the row direction and guiding the received laser to the seventh reflector, and the seventh reflector is used for guiding the received laser to the dodging assembly.

Optionally, the micro lenses arranged in the array are attached to a surface of the first lens facing the laser.

According to another aspect of the present invention, there is provided a projection apparatus comprising the above laser light source system.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

a laser light source system is provided, which comprises a laser, a light homogenizing assembly, a light combining lens assembly, a fluorescent assembly and a light outlet. Wherein, the dodging subassembly includes diffusion cell and first lens, carry out homogenization treatment through the laser that this dodging subassembly provided to the laser instrument, can make the energy density of shining each region of the facula of the laser of fluorescence subassembly comparatively even, the light beam that the luminance homogeneity is better that the light combination mirror group can provide fluorescence subassembly leads the light outlet, so, can make the luminance homogeneity of the light beam that laser source system provided better, the problem that the luminance homogeneity of the light beam that laser source system provided is relatively poor among the correlation technique has been solved, the effect of the luminance homogeneity of the light beam that laser source system provided has been realized improving.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a laser light source system;

fig. 2 is a schematic structural diagram of a laser light source system according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another laser light source system provided in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a light combining lens set in the laser light source system shown in FIG. 3;

FIG. 5 is a schematic diagram of a fluorescent assembly according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a fly-eye lens being irradiated with a laser spot according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another laser light source system provided in an embodiment of the present invention;

FIG. 8 is a schematic view of the laser source system shown in FIG. 7 looking in a first direction at a portion 20A of the laser source system;

FIG. 9 is a schematic diagram of a laser in the laser light source system shown in FIG. 7;

FIG. 10 is a schematic diagram of the laser spots provided by the laser of FIG. 8 before and after passing through the first set of mirrors;

FIG. 11 is a schematic diagram of a laser and a second mirror set according to an embodiment of the present invention;

FIG. 12 is a schematic view of the laser light source system of FIG. 11 looking in a second direction toward the laser;

FIG. 13 is a schematic diagram of another laser light source system according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of a construction of a multi-color laser in the laser light source system shown in FIG. 13;

FIG. 15 is a schematic structural diagram of another laser light source system according to an embodiment of the present invention;

FIG. 16 is a schematic diagram of another laser light source system according to an embodiment of the present invention;

fig. 17 is a top view of the color wheel of the laser light source system of fig. 16;

fig. 18 is a schematic structural diagram of a projection apparatus according to an embodiment of the present invention.

With the above figures, certain embodiments of the utility model have been illustrated and described in more detail below. The drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The projection display system may include a light source system, which may include a laser light source system, a conventional bulb light source system, and the like. The laser light source system can use laser to excite the fluorescence conversion material, generates fluorescence with different colors as a light source, and compared with the traditional bulb light source system, the laser light source system which generates fluorescence through laser excitation has the characteristics of high brightness, bright color, low energy consumption and long service life, so that the projection equipment has the characteristics of high picture contrast and clear imaging.

Fluorescence is the emission of light from a substance after absorption of light or other electromagnetic radiation. That is, when a substance is irradiated with incident light of a certain wavelength, the substance absorbs light energy and enters an excited state, and immediately is de-excited and emits light having such a property that the emitted light having a longer wavelength than the incident light (generally, the wavelength is in the visible light band), which is called fluorescence.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a laser light source system, and the laser light source system 10 includes a laser 101, an optical path component 102, a fluorescent component 103, and a light outlet 104. The optical path member 102 includes a dichroic sheet 1021 and a reflecting mirror 1022, and the fluorescent member 103 includes a fluorescent region for exciting fluorescence and a laser light reflecting region for reflecting the laser light s1 transmitted by the dichroic sheet 1021.

The dichroic plate 1021 receives the laser light s1 emitted by the laser 101, and guides the laser light s1 to the fluorescent component 103, the fluorescent component 103 emits fluorescent light and reflects the laser light to the dichroic plate 1021, the dichroic plate 1021 reflects the fluorescent light to the light outlet 104, and transmits the laser light s2 to the mirror again, the mirror reflects the laser light s1 to the dichroic plate 1021, and the dichroic plate 1021 transmits the laser light s1 to the light outlet 104.

In the above laser light source system, the energy of the central area of the spot of the laser light s1 irradiated onto the fluorescent member 103 is high, and the energy of the edge area is low, that is, the energy density of each area of the spot is not uniform, so that the laser light source system 10 has the following two problems:

1) the uniformity of the brightness of the light beam provided by the phosphor assembly 103 is poor, resulting in poor uniformity of the brightness of the light beam provided by the laser light source system 10.

2) Since the fluorescence conversion material on the fluorescent component 103 has the phenomenon of optical saturation, that is, when the energy received by the fluorescence conversion material reaches a certain level, the intensity of the generated fluorescence starts to tend to a constant value, and does not increase with the increase of the received energy, so that the region with higher energy density on the fluorescent component 103 may not fully play a role of optical conversion, and a part of the laser s1 cannot be effectively converted into fluorescence, thereby reducing the overall brightness of the light beam provided by the laser source system 10.

Embodiments of the present invention provide a laser light source system, which can solve the above problems in the related art.

Fig. 2 is a schematic structural diagram of a laser light source system according to an embodiment of the present invention, please refer to fig. 2. The laser light source system 20 may include: a laser 21, a light homogenizing assembly 22, a light combining lens assembly 23, a fluorescent assembly 24 and a light outlet 25.

The light homogenizing assembly 22 may be disposed between the laser 21 and the light combining lens assembly 23, and the light homogenizing assembly 22 may include a diffusing unit 221 and a first lens 222, the diffusing unit 221 may be disposed on a side of the first lens 222 close to the laser 21, and the diffusing unit 221 may receive the laser light s1 provided by the laser 21 and direct the homogenized laser light s1 to the first lens 222 to be transmitted to the light combining lens assembly 23 after passing through the first lens 222.

The light combining lens group 23 is located between the fluorescent component 24 and the light homogenizing component 22, the light outlet 25 is located on a side of the light combining lens group 23 facing the fluorescent component 24, and the light combining lens group 23 can guide the laser s1 provided by the light homogenizing component 22 to the fluorescent component 24 and guide the light beam provided by the fluorescent component 24 to the light outlet 25.

The phosphor element 24 may include at least one phosphor conversion material that may be excited under illumination by the laser light s1 to produce phosphor light s2 and emit phosphor light s2 out of the phosphor element 24. The fluorescent member 24 may also reflect the laser light s1 provided by the laser 21, and reflect the reflected laser light s3 toward the light combining member 23.

The diffusion unit 221 may homogenize the energy of the laser s1 provided by the laser 21, and the energy density distribution of the light spot irradiated onto the fluorescent assembly 24 by the homogenized laser s1 is relatively uniform, so that the brightness uniformity of the light beam emitted by the fluorescent assembly 24 may be improved, the light saturation phenomenon caused by the energy concentration occurring on the fluorescent assembly 24 may be avoided, and the overall brightness of the laser light source system 20 may be improved.

To sum up, the embodiment of the utility model provides a laser light source system, including laser instrument, even light subassembly, the group of synthesizing light mirror, fluorescence subassembly and light-emitting window. Wherein, the dodging subassembly includes diffusion cell and first lens, carry out homogenization treatment through this dodging subassembly to the laser that the laser instrument provided, can be so that the energy density of shining each region of the facula of the laser of fluorescence subassembly is comparatively even, the light beam direction light-out port that the luminance homogeneity that closes the optical lens group and can provide the fluorescence subassembly is better, thus, can make the luminance homogeneity of the light beam that laser source system provided better, the problem that the luminance homogeneity of the light beam that laser source system provided among the correlation technique is relatively poor is solved, the effect of the luminance homogeneity of the light beam that has realized improving laser source system and provided.

Alternatively, as shown in fig. 2, the diffusion unit 221 may include a fly-eye lens 223, the fly-eye lens 223 may have a plurality of microlenses 2232 arranged in an array, and the first lens 222 may include a convex lens.

The diffusing unit 221 may be located on a side of the first lens 222 close to the laser 21, and may increase a spot area of the laser light s1 received on the diffusing unit 221, and may improve a homogenizing effect of the diffusing unit 221 on the laser light s 1. Fly-eye lens 223 may include a glass substrate 2231 and a plurality of microlenses 2232 arranged in an array on a light incident surface of glass substrate 2231. Among them, the microlenses 2232 may include a plano-convex lens, which may include a flat surface facing the glass substrate 2231 and a curved surface facing away from the glass substrate 2231. The orthographic projection of the curved surface on the glass substrate 2231 may be rectangular, so that the plurality of microlenses 2232 on the light incident surface of the fly-eye lens 223 may divide the spot of the input laser light s1 into a plurality of rectangular spots, thereby achieving homogenization of the laser light s 1. The micro lens in the fly-eye lens 223 may be a spherical convex lens or an aspheric convex lens. The first lens 222 may converge the plurality of divided rectangular light spots, and converge the homogenized laser light s1 to the fluorescent assembly 24.

Alternatively, the diffusion unit 221 may further include a diffusion sheet, which may include a transparent substrate and a diffuser disposed on the transparent substrate, and the first lens 222 may include a convex lens. The diffuser may include ground glass that may disrupt the directionality of the laser light s1 impinging on the diffuser to homogenize the laser light s1 that passes through the diffuser. The first lens 222 can receive the laser light s1 transmitted through the diffusion sheet and focus the homogenized laser light s1 to the fluorescent component 24.

Alternatively, as shown in fig. 3 and 4, fig. 3 is a schematic structural diagram of another laser light source system provided in the embodiment of the present invention. Fig. 4 is a schematic structural diagram of a light combining lens set in the laser light source system shown in fig. 3. The light combining lens assembly 23 may have a light transmitting region 231 and a reflecting region 232 disposed around the light transmitting region 231. The light transmitting region 231 may transmit the laser light s1 provided by the dodging assembly 22, and the reflecting region 232 may reflect the received light beam provided by the phosphor assembly 24.

Alternatively, the light combining mirror group 23 may include a transparent substrate, and a dichroic film and a reflective film on the transparent substrate. Among them, the dichroic film may be located at the light transmission region 231, and the reflective film may be located at the reflective region 232. The light combining lens assembly 23 can be a lens with an integral structure, and the light combining lens assembly 23 can be made by dividing a light transmitting area 231 and a reflecting area 232 on a transparent substrate, then plating a dichroic film on the light transmitting area 231, and plating a reflecting film on the reflecting area 232, so that the light combining lens assembly 23 can have two functions of transmission and reflection. In this manner, the number of optical elements in the laser light source system 20 can be reduced.

The laser light source system 20 may further include a fourth lens 251 and a light pipe 252, the fourth lens 251 and the light pipe 252 may be located at the light outlet 25, and the fourth lens 251 may receive the light beams provided by the light combining lens group 23 and converge the light beams to the light pipe 252.

The light pipe 252 may be a hollow light pipe or a solid light pipe. The hollow light guide pipe is a tubular device formed by splicing four plane reflection sheets, and light rays are reflected for multiple times in the hollow light guide pipe to achieve the effect of light homogenization. The solid light pipe may be made of quartz, and transmits the light beam by making the light beam generate total reflection inside the solid light pipe. The light beam enters from the light inlet of the light guide pipe and then exits from the light outlet of the light guide pipe to the laser light source system 20, and beam homogenization and light spot optimization are completed in the process of passing through the light guide pipe.

Alternatively, as shown in fig. 5, fig. 5 is a schematic structural diagram of a fluorescent assembly provided in an embodiment of the present invention. The phosphor assembly 24 may include a phosphor region 241 and a diffuse reflecting region 242. The phosphor element 24 may include at least one phosphor conversion material located in the phosphor region 241, which may be excited under the illumination of the laser light s1 to generate the phosphor light s2 and emit the phosphor light s2 out of the phosphor element 24.

The fluorescence region 241 generates fluorescence s2 under excitation of the laser light s1 and directs the fluorescence s2 to the light combining lens assembly 23, and the diffuse reflection region 242 of the fluorescence assembly 24 can be used to process the received laser light s1 into diffused light s3 and reflect the diffused light s 3. The diffuse reflection region 242 guides the diffused light s3 to the light combining lens assembly 23, and the reflection region 232 of the light combining lens assembly 23 reflects the fluorescent light s2 provided by the fluorescent component 24 and the diffused light s3 toward the light outlet 25. The number of times that the laser light s1 emitted by the laser 21 passes through the light-transmitting region 231 of the light combining lens group 23 during the traveling process of the laser light source system 20 can be reduced, and the light loss of the laser light s1 provided by the laser 21 can be avoided.

The fluorescent assembly 24 may further include a rotation axis Z, and the fluorescent assembly 24 may be driven by the rotation axis Z to rotate in the w direction or the opposite direction of the w direction. With the rotation of the fluorescent device 24, the laser light s1 transmitted through the light combining lens assembly 23 can be irradiated to the fluorescent region 241 or the diffuse reflection region 242 of the fluorescent device 24. The fluorescent section 241 may be provided with different kinds of fluorescent conversion materials, and for example, as shown in fig. 5, the fluorescent section 241 may include a first fluorescent section 2411 and a second fluorescent section 2412, and the first fluorescent section 2411 and the second fluorescent section 2412 may be provided with fluorescent conversion materials for emitting different colors, respectively. The fluorescence conversion material may be at least one of a green fluorescence conversion material, a yellow fluorescence conversion material or a red fluorescence conversion material, wherein the green fluorescence conversion material is used for being excited to generate green fluorescence s2, the yellow fluorescence conversion material is used for being excited to generate yellow fluorescence s2, and the red fluorescence conversion material is used for being excited to generate red fluorescence s 2. The laser 21 may emit blue laser light s 1.

As shown in fig. 3, the focal point c of the first lens 222 may be located at the center of the light-transmitting region 231, and thus, the size of the light-transmitting region 231 may be made smaller. In this way, the size of the light-transmitting region 231 for receiving the laser light s1 emitted from the dodging assembly 22 can be made smaller, and thus the size of the laser light source system 20 can be made smaller.

The laser light source system 20 may further include a lens group 26 located between the fluorescence component 24 and the light combining group 23, the lens group 26 may include at least one convex lens, the lens group 26 may be configured to collect the homogenized laser light s1 transmitted through the light transmissive region 231 and guide the laser light s1 to the fluorescence region 241 or the diffuse reflection region 242, the fluorescence region 241 is configured to generate fluorescence s2 under excitation of the received laser light s1 and emit the fluorescence s2 to the lens group 26, and the diffuse reflection region 242 is configured to reflect the received laser light s1 to the lens group 26.

Illustratively, the lens group 26 may include a second lens 261 and a third lens 262. The second lens 261 and the third lens 262 are disposed along the same optical axis. The second lens 261 and the third lens 262 may be configured to receive and focus the laser light s1 transmitted by the light-transmitting region 221 of the light-combining lens 22, and direct the focused laser light s1 to the fluorescent assembly 24. The second lens 261 and the third lens 262 can also receive and converge the fluorescent light s2 or the diffused light s3 emitted by the fluorescent component 24, and guide the converged diffused light s3 or the fluorescent light s2 to the light combining lens group 23. The second lens 261 and the third lens 262 may be spherical convex lenses or aspherical convex lenses.

Alternatively, fig. 6 is a schematic diagram of a fly-eye lens irradiated with a spot of laser light provided by the embodiment of the utility model. Referring to fig. 3 and 6, an orthographic projection of the microlens 2232 of the fly-eye lens 223 on a first plane perpendicular to the optical axis L1 of the first lens 222 may be rectangular. The laser 21 may include a plurality of light emitting chips 211 arranged in an array, and a light spot R irradiated by the laser light s1 emitted from the light emitting chips 211 on the fly eye lens 223 may be an ellipse, and a long axis of the light spot R is parallel to a long side of an orthographic projection of the microlens 2232 on the first plane.

Fly-eye lens 223 may receive and transmit laser light s1 emitted from laser 21, and homogenize the received laser light s 1. The major axis of the oval spot R refers to the longest line segment that can be obtained by connecting two points on the edge of the oval spot R.

In this way, the shape of the spot R of the laser light s1 emitted by the light emitting chip 211 may have a higher similarity with the shape of the micro lens 2232, so that the laser light s1 emitted by the light emitting chip 211 can form an image on the surface of the fly eye lens 223, and further more laser light s1 can penetrate through the fly eye lens 223, so as to improve the utilization rate of the laser light s 1.

Alternatively, fig. 7 is a schematic structural diagram of another laser light source system according to an embodiment of the present invention, fig. 8 is a schematic structural diagram of a portion 20A of the laser light source system shown in fig. 7, when the laser light source system is seen from the first direction, and fig. 9 is a schematic structural diagram of a laser in the laser light source system shown in fig. 7. Please refer to fig. 7, fig. 8 and fig. 9. The first direction may be parallel to the column direction f2 of the light emitting chips, the laser 21 may include a plurality of light emitting chips 211 arranged in rows and columns, the laser s1 light source system 20 may further include a first reflector group 27, the first reflector group 27 may be located between the light uniformizing element 22 and the laser 21, and the light emitting surface of the laser 21 may face the light uniformizing element 22.

The first mirror group 27 may include a first mirror unit 271 and a second mirror unit 272, and the second mirror unit 272 may be located at a side of the first mirror unit 271 away from the laser 21, and the plurality of light-emitting chips 211 are divided into two groups of light-emitting chips 211 in the column direction f2 and the row direction f 1. For example, as shown in fig. 9, the plurality of light emitting chips 211 may be arranged in 2 rows and 8 columns, that is, the plurality of light emitting chips 211 may include 2 rows of light emitting chips 211, and the 2 rows of light emitting chips 211 may be arranged in 8 columns of light emitting chips.

The plurality of light emitting chips 211 are divided into a first light emitting chip group 211a and a second light emitting chip group 211b in the row direction f1, the first light emitting chip group 211a may include 4 columns of the 8 columns of the light emitting chips 211, and the second light emitting chip group 211b may include the other 4 columns of the 8 columns of the light emitting chips 211.

The plurality of light emitting chips 211 are divided into a third light emitting chip group 211c and a fourth light emitting chip group 211d in the column direction f2, the first light emitting chip group 211a may include 1 line of the 2 lines of the light emitting chips 211, and the second light emitting chip group 211b may include the other 1 line of the 2 lines of the light emitting chips 211.

As shown in fig. 7, the first mirror unit 271 may include a first mirror 2711 and a second mirror 2712, the first mirror 2711 and the second mirror 2712 are arranged in the column direction f2, the second mirror is located on a side of the first mirror close to the optical axis L1 of the first lens 222, the first mirror 2711 is configured to receive the laser light s1 emitted from the group of light emitting chips 211 in the column direction f2 and guide the received laser light s1 to the second mirror 2712, and the second mirror 2712 is configured to guide the received laser light s1 out of the first mirror unit 271. The first and

second mirrors

2711 and 2712 may be two mirrors arranged in parallel with their reflecting surfaces facing each other. The row direction f1 in fig. 7 may be a direction perpendicular to the paper.

Illustratively, the first mirror unit 271 is used to translate the received laser light s1 emitted by the third light emitting chip set 211c to a direction close to the optical axis L1 of the first lens 222, and the laser light s1 emitted by the fourth light emitting chip set 211d may be closer to the optical axis L1 of the first lens 222, so that the first mirror unit 271 may be arranged to realize a beam reduction effect on the laser light s1 emitted by the third light emitting chip set 211c and the fourth light emitting chip set 211d, so that the light beam of the laser light s1 may be thinner, and the size of the dodging assembly 22 for receiving the laser light s1 may be smaller.

In an alternative embodiment, a mirror unit having a structure similar to that of the first mirror unit 271 may be further disposed in the light emitting direction of the fourth light emitting chip group 211d, so as to translate the laser light s1 emitted from the fourth light emitting chip group 211d to a direction close to the optical axis L1 of the first lens 222.

As shown in fig. 8, the second mirror unit 272 may include a third mirror 2721 and a fourth mirror 2722, the third mirror 2721 and the fourth mirror 2722 may be arranged along the row direction f1, the fourth mirror 2722 is located on one side of the third mirror 2721 close to the optical axis L1 of the first lens 222, the third mirror 2721 is configured to receive the laser light s1 provided by the group of light emitting chips 211 in the row direction f1 and guide the received laser light s1 to the fourth mirror 2722, and the fourth mirror 2722 is configured to guide the received laser light s1 to the dodging assembly 22. The column direction f2 in fig. 8 may be a direction perpendicular to the paper.

Illustratively, the second mirror unit 272 is used for translating the laser light s1 emitted by the first light-emitting chip group 211a to a direction close to the optical axis L1 of the first lens 222, and the laser light s1 emitted by the second light-emitting chip group 211b can be closer to the optical axis L1 of the first lens 222, so that the beam-shrinking effect can be achieved by arranging the second mirror unit 272 so that the laser light s1 emitted by the first light-emitting chip group 211a and the second light-emitting chip group 211b, and the size of the light homogenizing assembly 22 for receiving the laser light s1 can be smaller.

As shown in fig. 10, fig. 10 is a schematic diagram of a spot of the laser light provided by the laser device shown in fig. 8 before and after passing through the first mirror group. Fig. 10 is a schematic diagram 201 of a spot of the laser light s1 emitted from the laser 21 before the laser light s1 strikes the first mirror 27, and the spot R1 is formed on a first plane m1 perpendicular to the optical axis L1 of the first lens 222. The spot diagram 202 shows a schematic diagram of a spot R2 formed on a first plane m1 perpendicular to the optical axis L1 of the first lens 222 after the laser light s1 emitted from the laser 21 is subjected to beam reduction processing by the first reflecting mirror 27. As can be seen from the two spot diagrams in fig. 10, the first reflecting mirror 27 can make the spots provided by the light emitting chips 211 compact, and can make the spot size of the laser light s1 provided by the laser 21 small.

Alternatively, fig. 11 is a schematic structural diagram of a laser and a second mirror set according to an embodiment of the utility model, and fig. 12 is a schematic structural diagram of the laser light source system shown in fig. 11 when the laser light source system is seen from the second direction, please refer to fig. 11 and fig. 12. The second direction f3 may be a direction perpendicular to the light emitting surface of the laser 21, the laser 21 may include a plurality of light emitting chips 211 arranged in rows and columns, the laser light source system 20 may further include a second reflecting mirror group 28, the second reflecting mirror group 28 is located between the light uniformizing element 22 and the laser 21, and the light emitting direction of the laser 21 forms an included angle with the optical axis L1 of the first lens 222.

The second mirror group 28 may include a third mirror unit 281 and a fourth mirror unit 282, the third mirror unit 281 being located in the light emitting direction of the plurality of columns of the light emitting chips 211, the fourth mirror unit 282 being located between the third mirror unit 281 and the light unifying member 22, and the plurality of light emitting chips 211 including two groups of the light emitting chips arranged in the row direction f 1.

The third mirror unit 281 may include a fifth mirror 2811, the fifth mirror 2811 may be configured to receive the laser light s1 provided by the two sets of light emitting chips arranged along the row direction f1 and reflect the laser light s1 to the fourth mirror unit 282, and the fifth mirror 2811 may be configured to change the transmission direction of the laser light s1 emitted from the laser 21. As shown in fig. 11, the fifth reflector 2811 may include two reflectors arranged in parallel, which may not overlap in the direction of the optical axis L1 of the first lens 222, and may be configured to receive two sets of light emitting chips (laser light emitted by the third light emitting chip set 211c and the fourth light emitting chip set 211 d), respectively, so that flexibility of the placement position of the fifth reflector 2811 may be improved.

The fourth mirror unit 282 may include a sixth mirror 2821 and a seventh mirror 2822, the sixth mirror 2821 and the seventh mirror 2822 are arranged along the row direction f1, the seventh mirror 2822 is located at a side of the sixth mirror 2821 close to the optical axis L1 of the first lens 222, the sixth mirror 2821 is configured to receive the laser light s1 provided by the group of light emitting chips 211 in the row direction f1 and guide the received laser light s1 to the seventh mirror 2822, and the seventh mirror 2822 is configured to guide the received laser light s1 to the light uniformizing assembly 22. Sixth mirror 2821 and seventh mirror 2822 may be two mirrors arranged in parallel with their reflective surfaces facing each other.

Illustratively, the plurality of light emitting chips 211 are divided into a first light emitting chip group 211a and a second light emitting chip group 211b in the row direction f 1. The fourth mirror unit 282 is used for translating the received laser light s1 provided by the first light emitting chip set 211a to a direction close to the optical axis L1 of the first lens 222, and the laser light s1 emitted by the second light emitting chip set 211b can be closer to the optical axis L1 of the first lens 222, so that the beam shrinking effect of the laser light s1 emitted by the first light emitting chip set 211a and the second light emitting chip set 211b can be realized by arranging the fourth mirror unit 282, and the size of the dodging assembly 22 for receiving the laser light s1 can be smaller.

In an alternative embodiment, a mirror unit having a similar structure to the fourth mirror unit 282 may be further disposed on the optical path of the supplied laser light s1 of the second light-emitting chip group 211b to translate the laser light s1 supplied by the second light-emitting chip group 211b toward the direction close to the optical axis L1 of the first lens 222.

Alternatively, as shown in fig. 3, a plurality of microlenses 2232 arranged in an array are attached to a surface of the first lens 222 facing the laser 21. The side of the microlens 2232 facing away from the laser 21 may be glued to the side of the first lens 222 facing away from the light combining component 23, or the microlens 2232 may be integral with the first lens 222. Thus, the optical structure of the laser light source system 20 can be further made compact, and the size of the laser light source system 20 can be reduced. The Numerical Aperture (NA) of the first lens 222 may be less than 0.3.

Alternatively, as shown in fig. 13 and 14, fig. 13 is a schematic structural diagram of another laser light source system according to an embodiment of the present invention, and fig. 14 is a schematic structural diagram of a multicolor laser in the laser light source system shown in fig. 13. The laser light source system 20 may further include a multi-color laser 291, and the multi-color laser 291 may include a plurality of types of light emitting chips for emitting laser light of different colors, such as a green light emitting chip 291G for emitting green laser light, a blue light emitting chip 291B for emitting blue light, and a red light emitting chip 291R for emitting red light.

The multi-color laser 291 may emit multi-color laser s4, and the multi-color laser s4 may be irradiated to the light-transmitting region 231 of the light-combining assembly 23 and irradiated to the light outlet 25 through the light-transmitting region 231. The multi-color laser s4 can be mixed with the fluorescent light s2 and the diffused light s3 provided by the fluorescent component 24 to form white light at the light outlet 25, so that the light quality of the laser light source system 20 can be improved.

Illustratively, as shown in fig. 14, the multicolor laser 291 may include 9 light-emitting chips, and the 9 light-emitting chips may be arranged in two columns, wherein one column includes 4 red light-emitting chips 291R, the other column includes two blue light-emitting chips 291B and three green light-emitting chips 291G, and the two blue light-emitting chips 291B are located on both sides of the three green light-emitting chips 291G.

Alternatively, as shown in fig. 15, fig. 15 is a schematic structural diagram of another laser light source system according to an embodiment of the present invention. The laser light source system 20 may further include a third mirror group 292, wherein the light-emitting surface of the multi-color laser 291 may be parallel to the light-emitting surface of the laser 21, and the third mirror group 292 may receive the multi-color laser s4 emitted from the multi-color laser 291 and reflect the multi-color laser s4 to the light-transmitting region 231.

Wherein the plurality of light emitting chips of the multicolor laser 291 are arranged in two rows along the row direction f2, the third mirror group 292 may include a fifth mirror unit 2921 and an eighth mirror 2922. The fifth mirror unit 2921 may include a ninth mirror 29211 and a tenth mirror 29212, the ninth mirror 29211 and the tenth mirror 29212 being arranged in the third direction f4, the third direction f4 may be perpendicular to the column direction f4, and the ninth reflector 29211 and the tenth reflector 29212 correspond to two columns of light emitting chips one by one, namely a ninth reflector 29211 for receiving laser light s5 supplied from a column of light emitting chips such as red light emitting chip 291R, and guides the received laser light s5 to the tenth reflective mirror 29212, where the tenth reflective mirror 29212 may be a dichroic sheet, the tenth reflective mirror 29212 is configured to reflect the received laser light s5 provided by the ninth reflective mirror 29211 to the eighth reflective mirror 2922, the tenth reflective mirror 29212 is further configured to receive the laser light s6 emitted by another column of light-emitting chips (e.g., the blue light-emitting chip 291B and the green light-emitting chip 291G), and the laser light s6 may transmit through the tenth reflective mirror 29212 and irradiate to the eighth reflective mirror 2922. The eighth mirror 2922 may receive the laser light s5 and the laser light s6 provided by the tenth mirror 29212 and reflect the mixed multi-color laser light s4 to the light outlet 25.

Alternatively, as shown in fig. 16, fig. 16 is a schematic structural diagram of another laser light source system according to an embodiment of the present invention. The laser light source system 20 may further include an eleventh mirror 295 and a filter assembly 293, the eleventh mirror 295 may be located in the light emitting direction of the light combining assembly 23, the filter assembly 293 may be located between the fourth lens 251 and the light pipe 252, and the fourth lens 251, the filter assembly 293 and the light pipe 252 are sequentially arranged along the light emitting direction of the eleventh mirror 295. The filter assembly 293 may be used to filter the various color lights reflected by the eleventh mirror 295 of the light guide prism 291, so as to make the purity of the various color lights provided by the laser light source system 20 higher. The filter assembly 293 may include filters for filtering various colors of light, and may include, for example, a blue filter, a green filter, and a red filter.

In one exemplary embodiment, the laser light source system 20 includes a color wheel 294, the color wheel 294 including at least two annular regions; the phosphor zones and the diffuse reflective zones of the phosphor assembly 24 are located in a first annular zone of the at least two annular zones.

The filtering assembly 293 includes a color filter in a second annular region of the at least two annular regions. Fig. 17 is a top view of the color wheel in the laser light source system shown in fig. 16, in which the filter assembly 293 includes a first color filter 2931, a second color filter 2932, and a third color filter 2933, wherein the fluorescent assembly 24 includes a fluorescent region 241 and a diffuse reflection region 242, the fluorescent region 241 may include a first fluorescent region 2411 and a second fluorescent region 2412, the two fluorescent regions are used for emitting different colors of light under excitation of laser light, the first color filter 2931 may be used for correspondingly filtering fluorescent light emitted from the first fluorescent region 2411, the second color filter 2932 may be used for correspondingly filtering fluorescent light emitted from the second fluorescent region 2412, and the third color filter 2933 may be used for correspondingly filtering diffuse light emitted from the diffuse reflection region 242.

For example, in the laser light source system shown in fig. 16, the structure of the color wheel may be as shown in fig. 17, wherein the annular region where the first color filter 2931, the second color filter 2932 and the third color filter 2933 are located is a second annular region, and the annular region where the fluorescent region 241 and the diffuse reflection region 242 are located is a first annular region. The first color filter 2931 is located at the opposite side of the first fluorescent region 2411, the second color filter 2932 is located at the opposite side of the corresponding second fluorescent region 2412, and the third color filter 2933 may be located at the opposite side of the corresponding diffuse reflection region 242, so that the above-mentioned effects of generating and filtering the fluorescent light and the diffused light can be achieved when the color wheel rotates in the predetermined direction w. Under the structure, the color wheel has the functions of the fluorescent wheel and the color filtering wheel, and then the fluorescent wheel and the color filtering wheel are combined by the laser light source system, so that the structure of the laser light source system is simplified, and the miniaturization of the laser light source system is facilitated.

To sum up, the embodiment of the utility model provides a laser light source system, including laser instrument, even light subassembly, the group of light combination mirror, fluorescence subassembly and light outlet. Wherein, the dodging subassembly includes diffusion cell and first lens, carry out homogenization treatment through this dodging subassembly to the laser that the laser instrument provided, can be so that the energy density of shining each region of the facula of the laser of fluorescence subassembly is comparatively even, the light beam direction light-out port that the luminance homogeneity that closes the optical lens group and can provide the fluorescence subassembly is better, thus, can make the luminance homogeneity of the light beam that laser source system provided better, the problem that the luminance homogeneity of the light beam that laser source system provided among the correlation technique is relatively poor is solved, the effect of the luminance homogeneity of the light beam that has realized improving laser source system and provided.

It should be noted that, in the embodiment of the present invention, for the convenience of clearly showing the trend of the light path in the laser light source system 20, the light beam received by the fluorescent assembly 24 and the part of the light beam emitted from the fluorescent assembly 24 shown in fig. 3, 7, 15 and 16 are such that the part of the light path shown in fig. 3, 7, 15 and 16 does not comply with the reflection law, and in practical cases, the light beam received by the fluorescent assembly 24 and the light beam emitted from the fluorescent assembly 24 still comply with the reflection law microscopically due to the phenomenon of the fluorescent assembly 24 generating diffuse reflection on the received light beam.

Fig. 18 is a schematic structural diagram of a projection apparatus according to an embodiment of the present invention. As can be seen with reference to fig. 18, the projection apparatus may include: a laser light source system 20, at least one light valve 30, and a projection lens 40. The laser light source system 20 emits a light beam, and the at least one light valve 30 processes the light beam and guides the processed light beam to the projection assembly 40, thereby implementing an imaging function. The laser light source system 20 may be the laser light source system in any of the embodiments described above. The light valve 30 may be a Digital Micromirror Device (DMD).

In the present disclosure, the terms "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is intended to be illustrative of the present invention and should not be taken as limiting the scope of the utility model, which is defined by the appended claims and their equivalents.

Claims

1. A laser light source system, comprising: the device comprises a laser, a light homogenizing assembly, a light combining lens group, a fluorescent assembly and a light outlet;

2. The laser light source system according to claim 1, wherein the diffusing unit includes a fly-eye lens having a plurality of microlenses arranged in an array, and the first lens includes a convex lens.

3. The laser light source system according to claim 1, wherein the diffusion unit includes a diffusion sheet including a transparent substrate and a diffuser on the transparent substrate, and the first lens includes a convex lens.

4. The laser light source system according to claim 1, wherein the light combining mirror group has a light transmissive region and a reflective region disposed around the light transmissive region.

5. The laser light source system of claim 4, wherein the phosphor assembly comprises a phosphor zone and a diffuse reflection zone, the focal point of the first lens being located at the center of the transmissive zone;

6. The laser light source system according to claim 2, wherein an orthographic projection of the microlens on a first plane perpendicular to an optical axis of the first lens is rectangular;

the laser comprises a plurality of light emitting chips arranged in an array, light spots emitted by the light emitting chips and irradiated onto the fly-eye lens are oval, and the long axis of each light spot is parallel to the long edge of the orthographic projection of the micro lens on the first plane.

7. The laser light source system according to claim 1, wherein the laser device comprises a plurality of light emitting chips arranged in rows and columns, the laser light source system further comprises a first reflector group, the first reflector group is located between the light homogenizing assembly and the laser device, and a light emitting surface of the laser device faces the light homogenizing assembly;

the second mirror unit comprises a third mirror and a fourth mirror, the third mirror and the fourth mirror are arranged in the row direction, the fourth mirror is located on one side, close to the optical axis of the first lens, of the third mirror, the third mirror is used for receiving laser provided by a group of light emitting chips in the row direction and guiding the received laser to the fourth mirror, and the fourth mirror is used for guiding the received laser to the dodging assembly.

8. The laser light source system of claim 1, wherein the laser comprises a plurality of light emitting chips arranged in rows and columns, the laser light source system further comprises a second reflecting mirror group, the second reflecting mirror group is located between the light uniformizing assembly and the laser, and the light emitting direction of the laser forms an included angle with the optical axis of the first lens;

9. The laser light source system of claim 2, wherein the plurality of micro lenses arranged in an array are attached to a surface of the first lens facing the laser.

10. A projection device, characterized in that the projection device comprises a laser light source system according to any one of claims 1-9.