CN217386123U - Laser light source system and projection equipment - Google Patents

Abstract

The utility model discloses a laser light source system and projection equipment belongs to projection technical field. The laser light source system includes: laser instrument, speculum, fluorescence subassembly and light-emitting window. Wherein, laser instrument and speculum are located the same one side of speculum, the light-emitting window is located the opposite side of speculum, the speculum can reflect laser that the laser instrument sent to fluorescence subassembly, fluorescence and laser that fluorescence subassembly sent can transmit to the light-emitting window, so, can avoid the laser that the laser instrument sent to pass through the lower optical element of light transmissivity such as dichroic sheet in the light path of laser light source system, the light loss of the laser that can avoid the laser instrument to send is great, the great problem of light loss of the laser of laser light source system among the correlation technique has been solved, the effect of the utilization ratio of laser in the laser light source system has been realized improving.

Description

Laser light source system and projection equipment

Technical Field

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

Background

At present, the light sources of projection equipment are mainly divided into three types, namely, a traditional bulb light source, an LED light source and a laser light source, wherein the laser light source is used as the 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 comprises a dichroic film and a reflecting mirror, wherein the dichroic film receives laser emitted by a laser and guides the laser to a fluorescent component, the fluorescent component emits fluorescence and reflects the laser to the dichroic film, the dichroic film reflects the fluorescence to a light outlet and transmits the laser to the reflecting mirror again, the reflecting mirror reflects the laser to the dichroic film, and the dichroic film transmits the laser to the light outlet for the third time.

However, in the above laser light source system, the laser light passes through the dichroic sheet several times in the optical path of the laser light source system and is emitted to the light exit port, and the light transmittance of the dichroic sheet is low, which results in a large light loss of 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 the utility model discloses an aspect provides a laser light source system, laser light source system includes: the device comprises a laser, a reflector, a fluorescent component and a light outlet;

the reflecting surface of the reflector faces the light emitting surface of the laser, and the included angle between the light emitting direction of the laser and the reflecting surface of the reflector is an acute angle;

the fluorescent component is positioned on one side of the reflector facing the laser, and comprises a fluorescent area and a diffuse reflection area;

the light outlet is positioned on one side of the reflector, which is away from the fluorescent component;

the reflector receives laser emitted by the laser and reflects the laser to the fluorescent area or the reflecting area, the fluorescent area is used for generating fluorescence under the excitation of the received laser and emitting the fluorescence to the light outlet, and the diffuse reflection area is used for reflecting the received laser to the light outlet.

Optionally, the mirror includes a dichroic plate for reflecting the laser light emitted from the laser and transmitting the fluorescence provided by the fluorescent component.

Optionally, the laser light source system further includes a beam shrinking mirror group, the beam shrinking mirror group is located between the reflecting mirror and the laser device, and the beam shrinking mirror group receives the laser light emitted by the laser device and guides the shrunk laser light to the reflecting mirror.

Optionally, the laser light source system further includes a lens group, the lens group is located between the fluorescent component and the reflector, the lens group includes at least one convex lens, and the lens group is configured to converge the fluorescent light and the laser light provided by the fluorescent component and guide the fluorescent light and the laser light provided by the fluorescent component to the light outlet.

Optionally, a ratio of an area of a projection of the reflector in the second direction to an area of a projection of the lens group in the second direction may be in a range of 3% to 10%, and the second direction is parallel to the light outgoing direction of the reflector.

Optionally, the reflector overlaps with the laser in the light emitting direction of the laser, and the center of the reflector overlaps with the optical axis of the lens group.

Optionally, the fluorescent component includes a substrate, and a diffuse reflection layer and a fluorescent conversion material layer on the substrate, the diffuse reflection layer is located in the reflection region, and the fluorescent conversion material layer is located in the fluorescent region.

Optionally, the laser light source system further includes a first lens and a light-homogenizing unit, the first lens and the light-homogenizing unit are located at the light outlet, and the first lens receives the light beam provided by the lens group and converges the light beam to the light-homogenizing unit.

Optionally, the reflector is attached to a surface of the first lens, which faces away from the dodging unit, and the center of the reflector overlaps with the optical axis of the first lens.

According to the utility model discloses a further aspect provides a projection device, projection device includes: the laser light source system is provided.

The embodiment of the utility model provides a beneficial effect that technical scheme brought includes at least:

a laser light source system is provided, which comprises a laser, a reflector, a fluorescent component and a light outlet. Wherein, laser instrument and speculum are located the same one side of speculum, the light-emitting window is located the opposite side of speculum, the speculum can reflect laser that the laser instrument sent to fluorescence subassembly, fluorescence and laser that fluorescence subassembly sent can transmit to the light-emitting window, so, can avoid the laser that the laser instrument sent to pass through the lower optical element of light transmissivity such as dichroic sheet in the light path of laser light source system, the light loss of the laser that can avoid the laser instrument to send is great, the great problem of light loss of the laser of laser light source system among the correlation technique has been solved, the effect of the utilization ratio of laser in the laser light source system has been realized improving.

In addition, the number of optical elements in the laser light source system is small, so that the structure of the laser light source system is simple.

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 described 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 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 diagram of a fluorescent assembly of the laser light source system shown in FIG. 2;

fig. 4 is a schematic structural diagram of another laser light source system according to an embodiment of the present invention;

FIG. 5 is a schematic view of the mirror and lens assembly viewed in a second direction in the laser light source system shown in FIG. 4;

fig. 6 is a schematic cross-sectional view of a fluorescent assembly according to an embodiment of the present invention;

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 view of the structure of the first lens and the reflector viewed along the optical axis of the first lens in the laser light source system shown in FIG. 7;

fig. 9 is a schematic structural diagram of a projection apparatus according to an embodiment of the present invention.

There have been shown in the drawings and will hereinafter be described in detail specific embodiments of the invention. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Projection display systems may include light source systems, which may include laser light source systems, as well as conventional bulb light source systems, among others. 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 having a certain wavelength, the substance absorbs light energy and enters an excited state, and is immediately de-excited to emit light having a wavelength longer than that of the incident light (usually, the wavelength is in the visible light band), and the light emitted therefrom 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 sheet 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 sheet 1021, the dichroic sheet 1021 reflects the fluorescent light to the light exit 104, and transmits the laser light s2 to the mirror again, the mirror reflects the laser light s1 to the dichroic sheet 1021, and the dichroic sheet 1021 transmits the laser light s1 to the light exit 104 for the third time.

In the laser light source system, the laser light s1 emitted from the laser 101 is transmitted through the dichroic plate 1021 three times in the optical path of the laser light source system and then emitted to the light outlet 104, and the light transmittance of the dichroic plate 1021 is about 96%, so that the light efficiency of the laser light s1 transmitted through the dichroic plate 1021 three times is 1- (4%)] ³ 0.88. Resulting in a high optical loss of the laser light s1 of the laser light source system.

The embodiment of the utility model provides a laser light source system can solve the problem that exists among the above-mentioned correlation technique.

Fig. 2 is a schematic structural diagram of a laser light source system 20 according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of a fluorescent component in the laser light source system 20 shown in fig. 2, please refer to fig. 2 and fig. 3. The laser light source system 20 may include: a laser 21, a mirror 22, a phosphor assembly 23, and a light exit port 24.

The reflecting surface c1 of the reflector 22 can face the light emitting surface of the laser 21, and the reflector 22 can reflect the laser light s1 emitted by the laser 21. The angle a between the light exit direction f1 of the laser 21 and the reflecting surface c1 of the mirror 22 may be an acute angle.

The phosphor assembly 23 may be located on the side of the mirror 22 facing the laser 21, i.e. the phosphor assembly 23 may be located on the same side of the mirror 22 as the laser 21. The phosphor assembly 23 may include a phosphor zone 231 and a diffuse reflection zone 232. The fluorescence area 231 of the fluorescence assembly 23 can be used for being excited under the irradiation of the laser s1 to generate fluorescence s2, and diffuse the fluorescence s2 out of the fluorescence assembly 23. The diffuse reflection area 232 of the fluorescent assembly 23 may be used to process the received laser light s1 into diffused light s3 and reflect the diffused light s 3. The laser light s1 emitted from the laser 21 is reflected by the mirror 22 toward the fluorescence region 231 or the diffuse reflection region 232.

The light exit 24 may be located at a side of the mirror 22 facing away from the phosphor assembly 23. That is, the light outlet 24 and the fluorescent assembly 23 may be respectively located at two sides of the light combining lens.

In this way, the reflector 22 may receive the laser light s1 emitted by the laser 21 and reflect the laser light s1 to the fluorescent area 231 or the reflective area, the fluorescent area 231 is configured to generate fluorescent light s2 under excitation of the received laser light s1 and emit the fluorescent light s2 to the light outlet 24, and the diffuse reflective area 232 is configured to reflect the received laser light to the light outlet 24 (the diffuse reflective area 232 may process the received laser light s2 into diffuse light s3 and then reflect the diffuse light to the light outlet 24). In the process of traveling of the laser light source system 20, the laser light s1 emitted by the laser 21 does not pass through the optical element with low light transmittance, and compared with the prior art in which the laser light s1 passes through the dichroic sheet with low light transmittance for multiple times, the laser light s1 emitted by the laser 21 can be prevented from passing through the optical element with low light transmittance in the light path of the laser light source system 20, and the light loss of the laser light s1 emitted by the laser 21 can be prevented from being large.

Moreover, the number of optical elements in the laser light source system 20 is smaller than that of the laser light source system 10 in the related art, and the optical path in the laser light source system 20 can be simplified in the laser light source system 20, so that the structure of the laser light source system 20 is simpler.

To sum up, the embodiment of the utility model provides a laser light source system, including laser instrument, speculum, fluorescence subassembly and light-emitting window. Wherein, laser instrument and speculum are located the same one side of speculum, the light-emitting window is located the opposite side of speculum, the speculum can reflect laser that the laser instrument sent to fluorescence subassembly, fluorescence and laser that fluorescence subassembly sent can transmit to the light-emitting window, so, can avoid the laser that the laser instrument sent to pass through the lower optical element of light transmissivity such as dichroic sheet in the light path of laser light source system, the light loss of the laser that can avoid the laser instrument to send is great, the great problem of light loss of the laser of laser light source system among the correlation technique has been solved, the effect of the utilization ratio of laser in the laser light source system has been realized improving.

In addition, the number of optical elements in the laser light source system is small, so that the structure of the laser light source system is simple

Optionally, the laser 21 in the embodiment of the present invention may include a plurality of light emitting chips, and the light emitting chips may be used to emit the laser light s1 to the reflector 22. The light emitting chip may include a semiconductor light emitting element, which may emit laser light s1 having a wavelength ranging from 420nm to 470nm (i.e., a blue light band), for example. It should be noted that the light emitting chip in the embodiment of the present invention may also emit light beams in another wavelength range, for example, the light emitting chip may also emit light beams in a wavelength range of 410nm to 450 nm. The embodiments of the present invention are not limited herein.

The reflector 22 may reflect the received laser s1 to the fluorescent component 23 after receiving the laser s1 emitted by the light emitting chip, and the laser s1 emitted by the laser s1 does not need to pass through an optical element with a low light transmittance, so that the light loss of the laser s1 emitted by the light emitting chip in the process of being transmitted to the fluorescent component 23 is small, and the utilization rate of the laser s1 in the laser light source system 20 may be improved.

For example, the angle a between the light outgoing direction f1 of the laser 21 and the reflecting surface c1 of the reflector 22 is 45 degrees, and the light outlet 24 is located on the other side of the reflector 22, and the fluorescent component 23, the reflector 22 and the light outlet 24 can be arranged substantially on a straight line, so that the volume of the laser light source system can be reduced.

The shape of the reflector 22 may be circular, rectangular, triangular, etc. The shape of the reflector 22 may be the same as the shape of the light exit surface of the laser 21 so that the size of the reflector 22 may be small.

Optionally, as shown in fig. 4, fig. 4 is a schematic structural diagram of another laser light source system provided in an embodiment of the present invention. The reflecting mirror 22 may include a dichroic sheet 221, and the dichroic sheet 221 may be used to reflect the laser light emitted from the laser 21 and transmit the fluorescent light provided from the fluorescent member 23. In this way, the light output amount of the fluorescent light s2 in the laser light source system 20 can be increased, so that more fluorescent light s2 can be irradiated to the light outlet 24.

The laser s1 emitted by the laser 21 may be reflected by the dichroic sheet 221 to irradiate the fluorescent component 23, the fluorescent component 23 may rotate to change a position where the laser s1 emitted by the laser 21 irradiates the fluorescent component 23, so that the light outlet 24 of the laser light source system 20 outputs light rays with different colors, and when the laser s1 emitted by the laser 21 irradiates the diffuse reflection area 232 on the fluorescent component 23, the laser s1 emitted by the laser 21 may sequentially pass through the diffuse reflection area 232 and the light outlet 24 and then output the laser light source system 20. When the laser light s1 emitted from the laser 21 irradiates the fluorescent region 231 on the fluorescent component 23, the fluorescent region 231 generates fluorescent light s2 under the excitation of the received laser light s1, a part of the fluorescent light s2 may sequentially pass through the fluorescent region 231 and the light outlet 24 and then output the laser light source system 20, and at the same time, a part of the fluorescent light s2 may sequentially pass through the fluorescent region 231, the dichroic sheet 221 and the light outlet 24 and then output the laser light source system 20. In the embodiment of the present invention, by setting the reflecting mirror 22 as the dichroic sheet 221, the fluorescent light s2 provided by the fluorescent component 23 received by the reflecting mirror 22 can be transmitted through the reflecting mirror 22, and irradiate to the light outlet 24, so as to improve the light output amount of the fluorescent light s2 provided by the fluorescent component 23 in the laser light source system 20.

Optionally, as shown in fig. 4, the laser light source system 20 may further include a beam reduction mirror 25, the beam reduction mirror 25 may be located between the reflecting mirror 22 and the laser 21, and the beam reduction mirror 25 may receive the laser light s1 emitted from the laser 21 and direct the reduced laser light s1 to the reflecting mirror 22. The beam reduction mirror group 25 can make the radial size of the beam of the laser light s1 emitted by the laser 21 smaller, and can reduce the size of the spot of the laser light s1 so as to reduce the size of the reflecting mirror 22 receiving the laser light s 1. The beam reduction lens group 25 may include a convex lens and a concave lens arranged in a direction away from the laser 21, so as to converge and diverge the laser light s1 emitted from the laser 21, and output the laser light s1 with parallel transmission directions to the light transmissive region 221.

In this way, the size of the mirror 22 for receiving the laser light s1 emitted from the laser 21 can be made smaller, and the size of the laser light source system 20 can be made smaller. For example, as shown in fig. 4, the beam reducing mirror group 25 may be a telescope system composed of a convex lens and a concave lens, the spot area of the laser beam passing through the telescope system is reduced, which is equivalent to beam reduction, so that the beam of the laser beam s1 exiting from the beam reducing mirror group 25 is thinner than the beam of the laser beam s1 entering into the beam reducing mirror group 25, thereby enabling the size of the reflector 22 receiving the laser beam s1 to be smaller.

Alternatively, as shown in fig. 4, the laser light source system 20 may further include a lens group 26, the lens group 26 may be located between the fluorescent assembly 23 and the reflector 22, the lens group 26 may include at least one convex lens, and the lens group 26 is configured to converge the fluorescent light s2 provided by the fluorescent assembly 23 and the laser light, which may be diffused light s3, and guide the fluorescent light s1 and the laser light (diffused light s3) provided by the fluorescent assembly 23 to the light outlet 24. Since the divergence angle of the fluorescence s2 is relatively large, the lens group 26 can collimate the fluorescence s2 provided by the fluorescence assembly 23, and can convert the fluorescence s2 provided by the fluorescence assembly 23 into a parallel or approximately parallel light beam to be emitted.

Meanwhile, the lens group 26 is further disposed in the optical path of the laser s1 reflected by the reflector 22 and incident on the fluorescent component 23, and can be used for converging the laser s1 to form a small laser s1 spot incident on the fluorescent component 23.

Wherein, in the embodiment of the utility model, the optical axis of the laser s1 that the speculum 22 reflects can coincide with the optical axis L1 of the battery of lens 26, laser s1 that laser 21 sent can be with the income plain noodles of less incident angle incident fluorescence subassembly 23, can make the facula luminance of the light beam of incidenting to fluorescence subassembly 23 behind the battery of lens 26 comparatively even, and among the correlation technique, laser s1 that laser 21 sent has the contained angle between the orientation of inciding fluorescence subassembly 23 and the income plain noodles of fluorescence subassembly 23, the income plain noodles of fluorescence subassembly 23 is incided with great incident angle to laser s1 promptly, lead to shining the luminance inhomogeneous of the facula that goes into on the plain noodles of fluorescence subassembly 23. Compare in the correlation technique laser with great incident angle incidenting to fluorescence subassembly 23, the embodiment of the utility model provides an incidenting to fluorescence subassembly 23 with less incident angle laser s 1's luminance uniformity better, can be corresponding the luminance uniformity of the facula of the light beam that improves fluorescence subassembly 23 and provide.

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 may be disposed along the same optical axis and between the reflecting mirror 22 and the fluorescent member 23. The second lens 261 and the third lens 262 may be configured to receive and focus the laser light s1 reflected by the mirror 22, and direct the focused laser light s1 to the fluorescent assembly 23. The second lens 261 and the third lens 262 can also receive and collect the fluorescence s2 or the laser s1 emitted by the fluorescence component 23, and guide the collected laser s1 or the collected fluorescence s2 to the light combining lens 22. The second lens 261 and the third lens 262 may be spherical convex lenses or aspherical convex lenses.

Alternatively, as shown in fig. 5, fig. 5 is a schematic structural diagram of the laser light source system 20 shown in fig. 4, which is viewed along the second direction f2 and is directed to the reflector 22 and the lens group 26. The ratio of the area of the projection of the mirror 22 in the second direction f2 to the area of the projection of the lens group 26 in the second direction f2 may range from 3% to 10%, and the second direction f2 may be parallel to the light outgoing direction of the mirror 22. The smaller size of the reflector 22 can reduce the light blocked by the reflector 22 by the fluorescence s1 and the diffused light s3 provided by the fluorescence component 23 transmitted by the lens group 26, so that more fluorescence s1 and diffused light s3 provided by the fluorescence component 23 transmitted by the lens group 26 can enter the light outlet 24 and exit to the subsequent optical elements (such as an optical-mechanical lighting system) through the light outlet 24, and the light exiting amount of the fluorescence s2 and the laser s1 in the laser source system 20 can be increased.

Meanwhile, the size of the reflector 22 is small, so that the size of the laser light source system 20 can be small to meet the requirement of system miniaturization.

Alternatively, the mirror 22 has an overlap with the laser 21 in the light exit direction f1 of the laser 21, and the center p of the mirror 22 overlaps with the optical axis L1 of the lens group 26. Thus, the matching between the laser 21 and the optical paths of the reflector 22 and the lens assembly 26 is good, the optical architecture is compact, the optical utilization efficiency of the laser light source system 20 is high, and the overall brightness is high. The center p of the reflector 22 may refer to the center of the circle, center of gravity, etc. of the reflective surface c1 of the reflector 22.

Exemplarily, on a plane perpendicular to the light exit direction f1 of the laser 21, an orthographic projection of the reflection surface c1 of the mirror 22 on the light exit direction f1 of the laser 21 may be located in an orthographic projection of the light exit surface of the laser 21 on the light exit direction of the laser 21, and thus, an optical path between the laser 21 and the mirror 22 may be made short.

On a plane perpendicular to the optical axis L1 of the lens group 26, an orthographic projection of the reflecting surface c1 of the reflector 22 parallel to the optical axis of the outgoing light beam from the reflector 22 may be located in an orthographic projection of the lens group 26 parallel to the optical axis of the outgoing light beam from the reflector 22, the optical axis of the outgoing light beam from the reflector 22 may coincide with the optical axis L1 of the lens group 26, and the direction of the optical axis of the outgoing light beam from the reflector 22 may be perpendicular to the light outgoing direction of the laser 21. The laser light source system 20 can be made compact, and the laser light source system 20 can be made compact.

Alternatively, as shown in fig. 6, fig. 6 is a schematic cross-sectional structure diagram of a fluorescent assembly 23 according to an embodiment of the present invention. The phosphor assembly 23 may include a substrate 233 and a diffuse reflective layer 234 and a phosphor conversion material layer 235 on the substrate 233. Wherein the diffuse reflection layer 234 may be located at the diffuse reflection region 232 to process the laser light s1 received by the diffuse reflection region 232 into diffused light s3, and the fluorescence conversion material layer 235 may be located at the fluorescence region 231, wherein the fluorescence conversion material layer 235 may generate fluorescence s2 under excitation of the received laser light s 1.

The diffusive reflective layer 234 may include a white diffusive reflective layer that may diffusively reflect the received laser light s1 to the reflector 22 and homogenize the reflected laser light s 1.

The fluorescence conversion material layer 235 may include at least one fluorescence conversion material, for example, 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, the red fluorescence conversion material is used for being excited to generate red fluorescence s2, and the fluorescence conversion material layer 235 may emit the excited fluorescence s2 with different colors out of the fluorescent assembly 23.

For example, as shown in fig. 3, the fluorescence area 231 may include a first fluorescence area 2311 and a second fluorescence area 2312, the fluorescence conversion material layer 235 may include two fluorescence conversion materials of a green fluorescence conversion material, a yellow fluorescence conversion material or a red fluorescence conversion material, the two fluorescence conversion materials may be respectively located in the first fluorescence area 2311 and the second fluorescence area 2312, and when the laser light s1 reflected by the reflector 22 is irradiated onto the first fluorescence area 2311 or the second fluorescence area 2312, fluorescence s2 with different colors may be generated.

The fluorescent member 23 may further include a fluorescent reflecting layer 236 on the fluorescent region 231, and the fluorescent reflecting layer 236 may be on a side of the fluorescent conversion material layer 235 close to the substrate 233. The fluorescent reflecting layer can enhance the reflecting ability of the fluorescent member 23 to the fluorescent light s 2.

As shown in fig. 3, the fluorescent region 231 and the diffuse reflection region 232 of the fluorescent member 23 may be enclosed to form a closed loop shape, such as a ring shape; alternatively, the fluorescent area 231 and the diffuse reflection area 232 may be both fan-shaped, so as to form a disc shape by enclosing. It should be noted that, in fig. 2 in the embodiment of the present invention, a schematic diagram of a fluorescence excitation light path is shown, and the fluorescence component 23 may further include a rotation axis Z, and the rotation axis Z is fixedly connected to the substrate 233 of the fluorescence component 23. The fluorescent component 23 can rotate along the w direction or the reverse direction of the w direction under the driving of the rotating shaft Z. As the fluorescent component 23 rotates, different fluorescent conversion materials sequentially and repeatedly generate fluorescence according to the rotation timing sequence, and the fluorescence of different colors is reflected by referring to the path illustrated in fig. 2, and is converged by the lens assembly 26 and guided to the light outlet 24.

Optionally, as shown in fig. 4, the laser light source system 20 may further include a first lens 27 and a light uniformizing unit 28, the first lens 27 and the light uniformizing unit 28 may be located at the light outlet 24, and the first lens 27 may receive the light beam provided by the lens group 26 and converge the light beam to the light uniformizing unit 28.

The light unifying unit 28 may include a light guide, which may include a hollow light guide and a solid light guide. 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 light guide pipe to achieve the effect of light uniformization. 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 inlet and the light outlet of the light guide pipe are rectangles with the same shape and area, light beams enter from the light inlet of the light guide pipe and then are emitted out of the laser light source system 20 from the light outlet of the light guide pipe, and light beam homogenization and light spot optimization are completed in the process of passing through the light guide pipe.

Beam homogenization refers to the step of transforming a beam with uneven intensity distribution into a beam with uniform cross-section distribution through beam transformation. Speckle refers to the fact that when a laser light source is used to illuminate a rough surface such as a screen or any other object that produces diffuse reflection or diffuse transmission of light, the light beams interfere to form bright or dark spots, producing a random granular intensity pattern.

The light homogenizing unit 28 may also be a fly-eye lens, which is generally formed by combining a series of small lenses, and two arrays of fly-eye lenses are arranged in parallel to divide the light spots of the input laser beam, and the divided light spots are accumulated by a subsequent focusing lens, so as to obtain the effects of homogenizing the light beam and optimizing the light spots.

Alternatively, as shown in fig. 7 and fig. 8, fig. 7 is a schematic structural diagram of another laser light source system 20 provided in the embodiment of the present invention, and fig. 8 is a schematic structural diagram of the laser light source system 20 shown in fig. 7, which is viewed along the optical axis of the first lens and is directed to the reflector and the first lens. The reflecting mirror 22 may be attached to a side of the first lens 27 facing away from the dodging unit 28, and a center p of the reflecting mirror 22 overlaps with the optical axis L2 of the first lens 27. The side of the reflector 22 facing away from the phosphor assembly 23 may be glued to the side of the first lens 27 facing away from the light unifying unit 28, or the reflector 22 may be of unitary construction with the first lens 27. 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.

Moreover, since the center p of the reflector 22 and the optical axis L2 of the first lens 27 overlap, the optical axis L2 of the first lens 27 can be made to coincide with the optical axis L1 of the lens group 26, so that the first lens 27 can receive more light beams provided by the fluorescent component 23 emitted by the lens group 26, and the utilization rate of the light of the laser light source system 20 is improved.

Since the shape of the light emitting surface of the laser 21 may be an ellipse, and the shape of the reflecting surface of the reflecting mirror 22 may also be an ellipse, the reflecting mirror 22 may be relatively matched with the shape of the spot of the laser s1 emitted by the laser 21, and further the size of the reflecting mirror 22 is relatively small.

To sum up, the embodiment of the utility model provides a laser light source system, including laser instrument, speculum, fluorescence subassembly and light-emitting window. Wherein, laser instrument and speculum are located the same one side of speculum, the light-emitting window is located the opposite side of speculum, the speculum can reflect laser that the laser instrument sent to fluorescence subassembly, fluorescence and laser that fluorescence subassembly sent can transmit to the light-emitting window, so, can avoid the laser that the laser instrument sent to pass through the lower optical element of light transmissivity such as dichroic sheet in the light path of laser light source system, the light loss of the laser that can avoid the laser instrument to send is great, the great problem of light loss of the laser of laser light source system among the correlation technique has been solved, the effect of the utilization ratio of laser in the laser light source system has been realized improving.

In addition, the number of optical elements in the laser light source system is small, so that the structure of the laser light source system is simple.

It should be noted that, in the embodiment of the present invention, in order to clearly show the trend of the light path in the laser light source system, the light beam received by the fluorescent component 23 and the partial light beam emitted from the fluorescent component 23 shown in fig. 2, 4 and 7, so that the light path shown in fig. 2, 4 and 7 does not conform to the reflection law, and in practical applications, due to the phenomenon of diffuse reflection generated on the fluorescent component 23 for the received light beam, the light beam received by the fluorescent component 23 and the emitted light beam still conform to the reflection law at a microscopic level.

According to the utility model discloses an on the other hand provides a projection equipment, and projection equipment includes: the laser light source system in any of the above embodiments.

Fig. 9 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. 9, 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), and the DMD may include a rectangular functional area, wherein the polarization direction of the laser light is parallel or perpendicular to the long axis direction of the functional area.

The term "at least one of a and B" in the present invention is only an association relationship describing an associated object, and means that there may be three relationships, for example, at least one of a and B may mean: a exists alone, A and B exist simultaneously, and B exists alone. Similarly, "A, B and at least one of C" indicates that there may be seven relationships that may indicate: seven cases of A alone, B alone, C alone, A and B together, A and C together, C and B together, and A, B and C together exist. Similarly, "A, B, C and at least one of D" indicates that there may be fifteen relationships, which may indicate: fifteen cases of a alone, B alone, C alone, D alone, a and B together, a and C together, a and D together, C and B together, D and B together, C and D together, A, B and C together, A, B and D together, A, C and D together, B, C and D together, A, B, C and D together exist.

In the present application, the terms "first," "second," "third," and "fourth" 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 only an optional embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A laser light source system, comprising: the device comprises a laser, a reflector, a fluorescent component and a light outlet;

the reflecting surface of the reflector faces the light emitting surface of the laser, and the included angle between the light emitting direction of the laser and the reflecting surface of the reflector is an acute angle;

the fluorescent component is positioned on one side of the reflector facing the laser, and comprises a fluorescent area and a diffuse reflection area;

the light outlet is positioned on one side of the reflector, which is away from the fluorescent component;

the reflector receives laser emitted by the laser and reflects the laser to the fluorescent area or the reflecting area, the fluorescent area is used for generating fluorescence under the excitation of the received laser and emitting the fluorescence to the light outlet, and the diffuse reflection area is used for reflecting the received laser to the light outlet.

2. The laser light source system of claim 1, wherein the mirror comprises a dichroic plate configured to reflect laser light emitted by the laser and transmit fluorescence provided by the fluorescent component.

3. The laser light source system of claim 1, further comprising a beam reduction lens set, the beam reduction lens set being located between the reflector and the laser, the beam reduction lens set receiving the laser light emitted by the laser and guiding the reduced laser light to the reflector.

4. The laser light source system of claim 1, further comprising a lens assembly disposed between the phosphor assembly and the reflector, the lens assembly comprising at least one convex lens, the lens assembly being configured to converge the phosphor light and the laser light provided by the phosphor assembly and direct the phosphor light and the laser light provided by the phosphor assembly to the light outlet.

5. The laser light source system according to claim 4, wherein a ratio of a projected area of the reflector in the second direction to a projected area of the lens group in the second direction may range from 3% to 10%, and the second direction is parallel to a light emitting direction of the reflector.

6. The laser light source system according to claim 4, wherein the mirror has an overlap with the laser in a light exit direction of the laser, and a center of the mirror overlaps with an optical axis of the lens group.

7. The laser light source system of claim 1, wherein the phosphor assembly comprises a substrate and a diffuse reflective layer and a phosphor conversion material layer on the substrate, the diffuse reflective layer being located in the reflective region and the phosphor conversion material layer being located in the phosphor region.

8. The laser light source system according to claim 4, further comprising a first lens and a dodging unit, wherein the first lens and the dodging unit are located at the light outlet, and the first lens receives the light beam provided by the lens group and converges the light beam to the dodging unit.

9. The laser light source system as claimed in claim 8, wherein the reflector is attached to a surface of the first lens facing away from the dodging unit, and a center of the reflector overlaps with an optical axis of the first lens.

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

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