CN210573158U - Laser light source system, projector and lighting equipment - Google Patents

Abstract

The embodiment of the utility model provides a laser light source system, projector and lighting apparatus are related to. The laser light source system includes: a laser light source for emitting excitation light; a rotating color wheel for dividing the excitation light into a first excitation light and a second excitation light; the light recovery device is used for recovering the second exciting light generated by the rotating color wheel; the wavelength conversion device is used for receiving the first exciting light so that the first exciting light excites the wavelength conversion material to generate stimulated light; the first dichroic mirror is used for transmitting the exciting light, reflecting the stimulated light or reflecting the exciting light and transmitting the stimulated light; the first dichroic mirror combines the received laser light with the second excitation light incident to the first dichroic mirror after being recovered by the light recovery device. The laser light source system expands the structural design space of the light source system, and the light path design is less limited.

Description

Laser light source system, projector and lighting equipment

Cross Reference to Related Applications

The present application claims priority from the chinese patent application entitled "a laser light source system and laser projector" filed by the chinese patent office at 2018, 11, 12, and having application number 2018113426316, the entire contents of which are incorporated herein by reference.

Technical Field

The utility model belongs to the technical field of laser equipment, concretely relates to laser light source system, projector and lighting apparatus.

Background

The laser has good monochromaticity, high energy concentration, convenient light path design of collimation directionality, high brightness, long service life and low energy consumption.

At present, a mainstream laser light source system in the market is a laser fluorescent light source, red light, green light, yellow light generated by exciting fluorescent powder with blue laser and blue light emitted by the laser light source are used as light sources, and referring to fig. 1, an excitation light emitted by a laser light source 10 is emitted after passing through a collimating system 20, a light homogenizing system 30, a dichroic mirror 40 and a first light collecting system 50, a wavelength conversion material on a disc-shaped wavelength conversion device 60 is excited to generate a received laser, and the received laser is reflected by the dichroic mirror 40 after being collected by the first light collecting system 50; wavelength conversion device 60 has a transmission region or a gap, and can see through partial exciting light, and the exciting light of transmission is collected by second light collecting system 70, is retrieved by light recovery system 80 again, and light recovery system 80 includes three speculum and a diffusion piece, and the exciting light that second light collecting system 70 outgoing is after the multiple reflection and even light, and the optical axis direction changes 270, from the direction transmission dichroic mirror 40 that is perpendicular to the optical axis of collimation system 20, with the collection laser light that dichroic mirror 40 reflects.

In the prior art, blue light is collected after passing through the wavelength conversion device, and the light collection needs to be performed by closely arranging lenses on two sides of the wavelength conversion device, so that the design of a heat dissipation structure and an overall structure is influenced, and the layout of a light source system is limited.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above technical problems, an embodiment of the present invention provides a laser light source system, including: a laser light source for emitting excitation light; the rotating color wheel comprises a selective transmission part arranged along the circumferential direction of the rotating color wheel, and the rotating color wheel is used for dividing the exciting light into first exciting light and second exciting light through the selective transmission part during rotation; the light recovery device is used for recovering the second exciting light generated by the rotating color wheel; the wavelength conversion device comprises a reflecting layer and a wavelength conversion layer containing a wavelength conversion material, and is used for receiving the first excitation light so that the first excitation light excites the wavelength conversion material to generate stimulated light; the first dichroic mirror is used for transmitting the exciting light, reflecting the stimulated light or reflecting the exciting light and transmitting the stimulated light so as to enable the stimulated light to be combined with second exciting light which is recycled by the light recycling device and then enters the first dichroic mirror; wherein the excitation light includes the first excitation light and the second excitation light, and the stimulated light is reflected to the first dichroic mirror by a reflective layer of the wavelength conversion device.

Further, a first optical system is arranged between the laser light source and the rotating color wheel, the first optical system is used for focusing the laser light emitted by the laser light source to a first focal point, and the effective part of the selective transmission part in the light path is positioned near the first focal point.

Further, the effective part of the selective transmission part in the light path is positioned at the outer edge of the rotating color wheel, and the area size of the effective part of the selective transmission part in the light path is larger than the spot size of the laser focused by the first optical system on the selective transmission part.

Further, the selective transmission part comprises a reflection area and a transmission area.

Further, the exciting light penetrates through the transmission region to form the first exciting light, and the exciting light is emitted in the reflection region to form the second exciting light.

Further, the reflection region and the transmission region both include a scattering functional layer for scattering the excitation light.

Further, the scattering functional layer of the transmission region is positioned on the light-emitting side of the transmission region; and the scattering functional layer of the reflecting area is positioned on the light incident side of the reflecting area.

Further, the wavelength conversion device comprises a driving device and a supporting surface, the supporting surface is cylindrical or disc-shaped, and a wavelength conversion layer is arranged on the surface of the supporting surface.

Further, the laser light source system further comprises a synchronous electronic control system for realizing the synchronization of the rotating color wheel and the wavelength conversion device.

Further, the laser light source comprises an excitation light source and a first compensation light source, wherein the excitation light source comprises a blue light laser, a violet light laser or an ultraviolet light laser; the first compensation light source comprises a red light laser and/or a green light laser; and after passing through the rotating color wheel, the laser emitted by the first compensation light source and the second excitation light are recovered by the light recovery device together, so that light combination with the excited light is realized.

Further, the laser light source system further comprises a second compensation light source, and the second compensation light source is arranged on one side of the light recovery device far away from the first dichroic mirror; the light recovery device comprises a second dichroic mirror, and the second dichroic mirror is used for combining the compensation light emitted by the second compensation light source and the second excitation light to the first dichroic mirror.

The embodiment of the present invention further provides a projector, which includes one of the above laser light source systems.

The embodiment of the utility model provides a still provide a lighting device, include one of the laser light source system as above.

The utility model discloses beneficial effect of embodiment: the embodiment of the utility model provides a laser light source system is owing to adopted the rotatory colour wheel that can carry out the beam split to the exciting light for incidenting to wavelength conversion device's exciting light only for being used for producing the first exciting light that receives the laser, need not hug closely in wavelength conversion device both sides like this and set up lens and carry out the light collection, has expanded light source system structural design's space greatly, and the light path design receives restriction still less.

Drawings

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

fig. 2 is a schematic structural diagram of a laser light source system according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of another laser light source system proposed in embodiment 1 of the present invention;

fig. 4 is a schematic structural diagram of a rotating color wheel according to the present invention;

fig. 5 is a schematic structural diagram of another rotating color wheel proposed by the present invention;

fig. 6 is a schematic structural diagram of another rotating color wheel proposed by the present invention;

fig. 7a is a schematic structural diagram of a reflection area in a rotating color wheel according to the present invention;

fig. 7b is a schematic structural diagram of a transmission region in a rotating color wheel according to the present invention;

fig. 8a is a schematic structural diagram of a substrate of a wavelength conversion device according to an embodiment of the present invention;

fig. 8b is a schematic structural diagram of a wavelength conversion device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a laser light source system according to embodiment 2 of the present invention;

fig. 10 is a schematic structural diagram of a laser light source system according to embodiment 3 of the present invention;

fig. 11 is a schematic structural diagram of a laser light source system according to embodiment 4 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the present invention is not limited to the drawings and the following embodiments.

Example 1

Referring to fig. 2 and fig. 3, the present embodiment provides a laser light source system, which includes a laser light source 100, a first optical system 200, a rotating color wheel 300, a first collimating device 400, a light recycling device 500, a second collimating device 600, a light homogenizing device 700, a first dichroic mirror 800, a second optical system 900, and a wavelength conversion device W. Specifically, the laser light source 100 is used to emit excitation light; the rotating color wheel 300 includes a selective transmission portion disposed along a circumferential direction thereof, and the rotating color wheel 300 is configured to divide the excitation light into a first excitation light and a second excitation light through the selective transmission portion when rotating; the light recovery device 500 is configured to recover the second excitation light generated by the rotating color wheel 300; the wavelength conversion device W comprises a reflecting layer and a wavelength conversion layer containing a wavelength conversion material, and is used for receiving first exciting light so that the first exciting light excites the wavelength conversion material to generate stimulated light; the first dichroic mirror 800 is configured to transmit the excitation light and reflect the received laser light, so that the received laser light combines with the second excitation light, which is recycled by the light recycling device 500 and then enters the first dichroic mirror 800; wherein the excitation light includes a first excitation light and a second excitation light, and the excited light is reflected by the reflective layer of the wavelength conversion device W to the first dichroic mirror 800.

The laser light source 100 is, for example, a blue laser, and blue light emitted by the blue laser can be used as excitation light, which can excite the wavelength conversion material on the wavelength conversion device W to generate stimulated light.

As shown in fig. 2 and 3, the first optical system 200 is disposed between the laser light source 100 and the rotating color wheel 300, the first optical system 200 is used for focusing the laser light emitted from the laser light source 100 to a first focal point, and an effective portion of the selective transmission portion of the rotating color wheel 300 in the optical path is located near the first focal point. The first optical system 200 includes at least one lens, for example, the first optical system 200 is a lens or a lens group. The position of the first optical system 200 may be adjusted to adjust the position of the first focus, so that a central angle (which may be obtained by dividing the diameter of the light spot by a corresponding radius of the rotating color wheel) corresponding to the light spot of the laser focused by the first optical system 200 on the selective transmission portion is within a preset angle range, which may be set according to actual requirements, for example, the preset angle range is (0 °, 12 °).

The rotating color wheel 300 may have a substantially disk shape and may be driven by a driving unit (e.g., a motor) to rotate. During the rotation, the rotating color wheel 300 realizes the separation of the first excitation light and the second excitation light by reflecting or transmitting the excitation light focused by the first optical system 200 at different periods. Further, the rotation plane of the rotating color wheel 300 is disposed at an angle with respect to the optical axis of the first optical system 200 (the rotation plane of the rotating color wheel 300 is non-parallel and non-perpendicular to the optical axis of the first optical system 200), and preferably, the included angle between the rotation plane of the rotating color wheel 300 and the optical axis of the first optical system 200 is 45 °, which facilitates the structural design of the laser light source system.

Preferably, as shown in fig. 4, an effective portion of the selective transmission portion of the rotating color wheel 300 in the optical path (e.g., a spot position 330 of the laser light on the selective transmission portion) is located at an outer edge of the rotating color wheel 300, and an area size of the effective portion of the selective transmission portion in the optical path is larger than a spot size of the laser light focused by the first optical system 200 on the selective transmission portion. Therefore, the opening angle of the light spot on the selective transmission part can be reduced as much as possible, the proportion of ineffective light (the light spot at the transition boundary of reflection or transmission) is reduced, and the utilization rate of light energy is improved.

Alternatively, referring to fig. 4, the rotating color wheel 300 includes a disk-shaped substrate and a reflective region 310 and a transmissive region 320 disposed in a circumferential direction of the disk-shaped substrate. The reflective region 310 and the transmissive region 320 may be formed by plating an antireflection film or a reflective film on a substrate, which is well known in the art and will not be described herein. As shown in fig. 4, the sum of the central angle corresponding to the reflection region 310 and the central angle corresponding to the transmission region 320 is 360 °, and the size relationship between the reflection region 310 and the transmission region 320 depends on the relative value of the light energy between the excited light and the second excitation light in the mixed light output by the laser light source system, for example, if the excited light corresponds to the reflection region 310 and the second excitation light corresponds to the transmission region 320, the larger the ratio of the light energy between the excited light and the second excitation light in the mixed light is, the larger the ratio of the size of the region between the reflection region 310 and the transmission region 320 is.

In one possible implementation manner, as shown in fig. 2, the excitation light penetrates through the transmission region 320 to form first excitation light, and the first excitation light is incident to the first dichroic mirror 800 through the second collimating device 600 and the light uniformizing device 700; the excitation light is emitted in the reflection region 310 to form a second excitation light, and the second excitation light is incident to the light recycling device 500 through the first collimating device 400. In another possible implementation manner, as shown in fig. 3, the excitation light is emitted in the reflection region 310 to form first excitation light, and the first excitation light is incident to the first dichroic mirror 800 through the second collimating device 600 and the light uniformizing device 700; the excitation light passes through the transmissive region 320 to form a second excitation light, and the second excitation light is incident to the light recycling device 500 through the first collimating device 400.

Further, the reflection region 310 can also reflect laser lights of different colors emitted from laser light sources of different colors, and different regions of the reflection region 310 reflect light of wavelengths such as blue, red, and green, respectively, during rotation. For example, as shown in fig. 5, the rotating color wheel 300 includes a blue wavelength transmitting region 301, a blue wavelength reflecting region 302, a red wavelength reflecting region 303, and a green wavelength reflecting region 304.

Further, as shown in fig. 6, the reflection region 310 and the transmission region 320 each include a scattering functional layer for scattering the excitation light. Therefore, the light spot energy of the first exciting light entering the wavelength conversion device W is more uniform, the exciting efficiency of the wavelength conversion device W is improved, the light spot energy of the output second exciting light is more uniform, and the subsequent optical elements can be conveniently utilized.

In one possible implementation, as shown in fig. 7a, the reflection region 310 includes a transparent glass 311, and a reflection film 312 and a scattering functional layer 313 disposed on both sides of the transparent glass 311, the scattering functional layer 313 is located on the light incident side of the reflection region 310. As shown in fig. 7b, transmissive region 320 includes transparent glass 321, and antireflection film 322 and scattering functional layer 323 disposed on two sides of transparent glass 321, where scattering functional layer 323 is located on the light-emitting side of transmissive region 320.

The first collimating device 400 may include at least two lenses for collecting and shaping the laser light (including the second excitation light) reflected by the rotating color wheel 300 in fig. 2 or the laser light (including the second excitation light) transmitted by the rotating color wheel 300 in fig. 3.

The light recycling device 500 may include two mirrors for changing the direction of the laser light and recycling the laser light emitted from the first collimating device 400, and the recycled laser light transmits the first dichroic mirror 800. Further, a scattering element, which may be a static scattering sheet (diffuser), may be disposed between the two mirrors, and the scattering element is used to homogenize light incident thereon.

The second collimating device 600 may also include at least two lenses for collimating the first excitation light transmitted through the rotating color wheel 300 in fig. 2 or the first excitation light reflected by the rotating color wheel 300 in fig. 3.

The dodging device 700 is used for dodging the first excitation light emitted by the second collimating device 600. The light unifying apparatus 700 may be, but is not limited to, a diffuser.

The first dichroic mirror 800 can transmit the excitation light emitted from the laser light source 100 and reflect the received laser light; that is, the first dichroic mirror 800 is configured to transmit the excitation light emitted from the light uniformizing apparatus 700 and the excitation light emitted from the light recycling apparatus 500, and reflect the received laser light emitted from the second optical system 900. The first dichroic mirror 800 may be implemented by an integral coating, a divisional coating, or a structural design, for example, the first dichroic mirror 800 is implemented by an integral coating, and the separation of the excitation light and the received laser light is implemented by a wavelength splitting or polarization splitting manner, where the wavelength splitting means that the first dichroic mirror 800 transmits light of some bands (e.g., bands corresponding to the excitation light) and reflects light of other bands (e.g., bands corresponding to the received laser light), and the polarization splitting means that the first dichroic mirror 800 transmits light in accordance with a certain polarization direction (e.g., polarization direction of the excitation light), and reflects light of other polarization directions. For another example, the first dichroic mirror 800 is implemented by a divisional coating, that is, two surfaces of the substrate of the first dichroic mirror 800 are coated with films with different structures, so that one surface reflects all light incident on the surface, and the other surface transmits all light incident on the surface.

The second optical system 900, such as a lens or a lens group, is configured to converge the first excitation light transmitted through the first dichroic mirror 800 to the second focal point, and collect the received laser light reflected by the wavelength conversion device W; wherein the second focal point is located near a wavelength conversion point of the wavelength conversion device W, and the specific location of the second focal point is related to the optical power of the first excitation light at the second focal point and the wavelength conversion efficiency of the wavelength conversion material in the wavelength conversion device W.

Optionally, the wavelength conversion device W includes a driving device and a supporting surface, the supporting surface includes a reflective layer and a wavelength conversion layer, and the wavelength conversion layer contains a wavelength conversion material capable of generating stimulated light under excitation of the excitation light. The wavelength conversion device W is configured to receive the first excitation light transmitted through the second optical system 900, generate the excited light under excitation of the first excitation light, the excited light is reflected by the reflective layer, is collected by the second optical system 900 and then enters the first dichroic mirror 800, and the excited light is reflected by the first dichroic mirror 800 and then combines with the second excitation light transmitted through the first dichroic mirror 800 after being recovered by the light recovery device 500.

Specifically, in one embodiment of the wavelength conversion device W, the supporting surface is cylindrical, and referring to fig. 8a and 8b, the supporting surface includes a base 11 and a wavelength conversion layer 12; the wavelength conversion layer 12 is located on the surface of the support surface, the base 11 serves as a support for the wavelength conversion layer 12, and the wavelength conversion layer 12 is disposed on the base 11.

In one possible implementation, the base body 11 is a hollow body open at least at one end, having a hollow portion. For example, as shown in fig. 8a, the base body 11 is made of a metal material, transparent glass, or the like, and has a substantially cylindrical shape, and the base body 11 has a cylindrical base 13; the base 11 has a reflective layer (not shown in the drawings) formed on an inner surface or an outer surface of the base 13 in a circumferential direction of the base 13, constituting a part of the base; when the substrate 13 is a transparent substrate, the reflective layer is disposed on the inner surface or the outer surface of the substrate 13, and when the substrate 13 is a non-transparent substrate, the reflective layer is disposed on the outer surface of the substrate 13; the reflective layer is formed by plating, for example.

As shown in fig. 8b, the driving device 14 (e.g. a motor) is used to drive the wavelength conversion device W to rotate, and the wavelength conversion layer 12 includes one or more wavelength conversion regions (e.g. wavelength conversion regions 121, 122, and 123) along the circumferential direction of the substrate (not shown), when there are a plurality of wavelength conversion regions, different wavelength conversion regions contain wavelength conversion materials with different colors, and different wavelength conversion materials generate excited light with different colors under the excitation of the excitation light.

Preferably, the wavelength conversion region includes one or more of a red wavelength conversion region, a green wavelength conversion region, a yellow wavelength conversion region, and a blue wavelength conversion region, each having a wavelength conversion material of a different color, respectively. The wavelength conversion material may be, for example, a fluorescent material, specifically, for example, one or more of a red fluorescent material, a green fluorescent material, a yellow fluorescent material, and a blue fluorescent material. The excitation light emitted by the laser excites the wavelength conversion materials with different colors to generate excited light with different colors, such as red excited light, green excited light, yellow excited light or blue excited light.

The following describes the working process of the laser light source system by taking fig. 2 as an example: during operation, after the excitation light emitted by the laser light source 100 is converged by the first optical system 200, along with the rotation of the rotating color wheel 300, the converged excitation light is reflected by the reflection area of the rotating color wheel 300 or transmitted through the transmission area of the rotating color wheel 300 at different time intervals, and the excitation light reflected by the reflection area is collected by the first collimating device 400, recovered by the light recovery device 500, and transmitted through the first dichroic mirror 800; the excitation light transmitted through the transmission region of the rotating color wheel 300 is collimated and homogenized, then transmitted through the first dichroic mirror 800, and then converged and incident on the wavelength conversion device W, the excitation wavelength conversion material generates the received laser light, and the received laser light is reflected by the reflection layer of the wavelength conversion device W, then collected by the second optical system 900, incident on the first dichroic mirror 800, reflected by the first dichroic mirror 800, and then combined with the excitation light transmitted through the first dichroic mirror 800 and recovered by the light recovery device 500.

In another embodiment, the supporting surface of the wavelength conversion device W is in the shape of a disk, and the wavelength conversion layer is disposed on the outer circumference of the disk, which is well known in the art and will not be described in detail.

Optionally, the laser light source system further includes a synchronous electronic control system, which is configured to synchronize the rotating color wheel 300 and the wavelength conversion device W.

Optionally, the laser light source system further includes a third optical system disposed on a light path where the mixed light of the stimulated light and the second excitation light is located, and the third optical system is configured to shape and spectrally adjust the mixed light. For example, the third optical system includes a lens and a color filter wheel sequentially arranged along the traveling direction of the light, the lens being used for focusing the mixed light, and the color filter wheel being used for filtering the mixed light. Specifically, the color filter wheel is located at a focal point position where the lens focuses the mixed light, and comprises a motor and a color filter, wherein the motor is used for driving the color filter to rotate, and the color filter is used for filtering the mixed light. The color filters may be arranged in a circular sector, and include one or more of red, green and blue color filters, and the position distribution and size of the color filters are adapted to the angles of the rotating color wheel 300 and the wavelength conversion device W. Further, the color filter wheel is synchronized with one or more of the rotating color wheel 300 and the wavelength conversion device W.

In this embodiment, this laser light source system has adopted the rotatory colour wheel that can carry out the beam split to the exciting light for the exciting light of incidenting to wavelength conversion device is only for being used for producing the first exciting light that receives the laser, need not hug closely to set up lens in wavelength conversion device both sides like this and carry out light collection, has expanded light source system structural design's space greatly, and the light path design receives restriction less.

Example 2

Referring to fig. 9, the present embodiment proposes another laser light source system, which includes a laser light source 100, a first optical system 200, a rotating color wheel 300, a first collimating device 400, a light recycling device 500, a second collimating device 600, a light uniformizing device 700, a first dichroic mirror 801, a second optical system 900, and a wavelength conversion device W.

In comparison with the laser light source system shown in fig. 2 described above, in the laser light source system shown in fig. 9, the first dichroic mirror 800 is replaced with the first dichroic mirror 801, and the light recovery device 500 includes the second dichroic mirror 502, and the other components are the same. Specifically, first dichroic mirror 801 is configured to reflect the excitation light and transmit the stimulated light, that is, first dichroic mirror 801 is capable of reflecting the first excitation light emitted from dodging device 700 and transmitting the stimulated light emitted from second optical system 900. The light recovery device 500 includes a reflecting mirror 501 and a second dichroic mirror 502, the second dichroic mirror 502 is used for reflecting the excitation light and transmitting the excited light, that is, the light recovery device 500 can recover the second excitation light emitted from the first collimating device 400, the recovered second excitation light is reflected by the second dichroic mirror 502 and then output, and the excited light transmitting the first dichroic mirror 801 is output after being transmitted from the second dichroic mirror 502, so that the combined light of the excited light and the second excitation light is realized.

Corresponding contents in embodiment 1 can be referred to for parts not described in detail in this embodiment, and technical effects produced by the laser light source system provided in this embodiment are the same as those in embodiment 1, and are not described again here.

Example 3

Referring to fig. 10, the present embodiment differs from fig. 2 of embodiment 1 in that: the laser light source 100 of the present embodiment is a multi-color laser light source, specifically, the laser light source 100 includes an excitation light source and a first compensation light source, the excitation light source may include a blue laser, a violet laser, an ultraviolet laser, or the like, and the first compensation light source may include a red laser and/or a green laser, or the like; after passing through the rotating color wheel 300, the laser emitted from the first compensation light source is recovered by the light recovery device 500 together with the second excitation light, so as to realize light combination with the received laser light. That is, the laser light source includes a first compensation light source such as a red laser and/or a green laser in addition to an excitation light source such as a blue laser.

The rotating color wheel 300 has a transmission region through which the excitation light emitted from the excitation light source can transmit and a reflection region through which the laser light of different colors (the excitation light emitted from the excitation light source and the first compensation light emitted from the first compensation light source) can be reflected, respectively, as shown in fig. 10; the first dichroic mirror 800 is capable of transmitting laser light emitted from the laser light source 100 and reflecting the received laser light.

In operation, the laser light source 100 may control the switching of the lasers with different colors by using a timing control switch, and light one or a group of lamps at a certain time, the control of the laser light source 100 is synchronized with the rotation of the rotating color wheel 300, and when the rotating color wheel 300 rotates to a transmission region or a different reflection region, the laser light with different colors transmits the rotating color wheel 300 or is reflected by the rotating color wheel 300. As shown in fig. 10, L1, L2, and L3 respectively represent laser lights of different colors emitted by the laser light source 100, wherein the blue light L1 is reflected by the rotating color wheel 300 or transmitted through the rotating color wheel 300 at different periods, and the red light L2 and the green light L3 are reflected by the rotating color wheel 300 at different periods. The first collimating device 400 collects the laser light reflected by the rotating color wheel 300, and the laser light emitted by the first collimating device 400 passes through the light recycling device 500, and then transmits through the first dichroic mirror 800, and is combined with the stimulated light reflected by the first dichroic mirror 800.

The laser light source system of the embodiment can compensate the deficiency of the laser receiving color gamut and the saturation by using the laser of multiple colors (the laser light source of multiple colors, namely the laser light source comprises the excitation light source and the first compensation light source), so that the color gamut of the light source is wider and the saturation is higher.

Example 4

Referring to fig. 11, the present embodiment provides another laser light source system, which includes a laser light source 100, a first optical system 200, a rotating color wheel 300, a first collimating device 400, a light recycling device 500, a second collimating device 600, a light homogenizing device 700, a first dichroic mirror 800, a second optical system 900, a wavelength conversion device W, and a second compensation light source S.

Compared with the laser light source system shown in fig. 2, in the laser light source system shown in fig. 11, a second compensation light source S is added, the light recovery device 500 includes a second dichroic mirror 502, the second dichroic mirror 502 is used for combining the compensation light (second compensation light) emitted by the second compensation light source S and the second excitation light to the first dichroic mirror 800, and the first dichroic mirror 800 can transmit the second compensation light emitted by the second compensation light source S, and other devices are the same.

Specifically, the second compensation light source S is disposed on a side of the light recovery device 500 away from the first dichroic mirror 800, and the wavelength of the second compensation light emitted by the second compensation light source S is different from the wavelength of the excitation light emitted by the laser light source 100. The second compensation Light source S may be, for example, a red Light laser, a green Light laser, a blue Light LED (Light Emitting Diode) Light source, a red Light LED Light source, a green Light LED Light source, or the like.

The light recovery device 500 includes a reflecting mirror 501 and a second dichroic mirror 502, and the second dichroic mirror 502 is used for reflecting the excitation light emitted from the laser light source 100 and transmitting the second compensation light emitted from the second compensation light source S. The light recovery device 500 can recover the excitation light emitted from the first collimating device 400, the recovered excitation light is reflected by the second dichroic mirror 502 to the first dichroic mirror 800, and the second compensation light emitted from the second compensation light source S is transmitted through the second dichroic mirror 502 to the first dichroic mirror 800.

The first dichroic mirror 800 is configured to transmit the excitation light emitted by the laser light source 100 and the second compensation light emitted by the second compensation light source S, and reflect the received laser light. The first dichroic mirror 800 can transmit the first excitation light emitted from the light uniformizing device 700, the second excitation light emitted from the light recycling device 500, and the second compensation light, and reflect the received laser light emitted from the second optical system 900, thereby realizing light combination of the received laser light and the second excitation light and the second compensation light.

The parts not described in detail in this embodiment may refer to the corresponding contents in embodiment 1, and are not described again here.

The laser light source system provided by the embodiment can compensate the defects of the laser receiving color gamut and the saturation by using the second compensation light source, so that the color gamut of the light source is wider and the saturation is higher.

Example 5

The present embodiment proposes a projector including the laser light source system in any one of embodiments 1 to 5 described above.

The implementation principle and the technical effect of the projector provided by the embodiment are the same as those of the embodiment of the laser light source system, and for brief description, reference may be made to the corresponding contents in the embodiment of the laser light source system for a part not mentioned in the embodiment of the projector.

Example 6

This embodiment proposes an illumination apparatus that is the laser light source system in any of embodiments 1 to 5 described above.

The lighting device may comprise a spotlight or a searchlight.

The implementation principle and the technical effect of the illumination device provided by the embodiment are the same as those of the foregoing laser light source system embodiment, and for brief description, reference may be made to the corresponding contents in the foregoing laser light source system embodiment for the sake of brevity.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A laser light source system, comprising:

a laser light source for emitting excitation light;

the rotating color wheel comprises a selective transmission part arranged along the circumferential direction of the rotating color wheel, and the rotating color wheel is used for dividing the exciting light into first exciting light and second exciting light through the selective transmission part during rotation;

the light recovery device is used for recovering the second exciting light generated by the rotating color wheel;

the wavelength conversion device comprises a reflecting layer and a wavelength conversion layer containing a wavelength conversion material, and is used for receiving the first excitation light so that the first excitation light excites the wavelength conversion material to generate stimulated light;

the first dichroic mirror is used for transmitting the exciting light, reflecting the stimulated light or reflecting the exciting light and transmitting the stimulated light so as to enable the stimulated light to be combined with second exciting light which is recycled by the light recycling device and then enters the first dichroic mirror; wherein the excitation light includes the first excitation light and the second excitation light, and the stimulated light is reflected to the first dichroic mirror by a reflective layer of the wavelength conversion device.

2. The laser light source system according to claim 1, wherein a first optical system for focusing the laser light emitted from the laser light source to a first focal point is present between the laser light source and the rotating color wheel, and an effective portion of the selective transmission section in the light path is located in the vicinity of the first focal point.

3. The laser light source system according to claim 2, wherein an effective portion of the selective transmission portion in the light path is located at an outer edge of the rotating color wheel, and an area size of the effective portion of the selective transmission portion in the light path is larger than a spot size of the laser light focused by the first optical system on the selective transmission portion.

4. The laser light source system according to claim 1, wherein the selectively transmitting portion includes a reflective region and a transmissive region.

5. The laser light source system according to claim 4, wherein the excitation light is transmitted through the transmissive region to form the first excitation light, and the excitation light is emitted at the reflective region to form the second excitation light.

6. The laser light source system according to claim 4, wherein the reflection region and the transmission region each include a scattering functional layer for scattering the excitation light.

7. The laser light source system according to claim 6, wherein the scattering functional layer of the transmissive region is located on a light exit side of the transmissive region; and the scattering functional layer of the reflecting area is positioned on the light incident side of the reflecting area.

8. The laser light source system of claim 1, wherein the wavelength conversion device comprises a driving device and a supporting surface, the supporting surface is cylindrical or disc-shaped, and a wavelength conversion layer is disposed on a surface of the supporting surface.

9. The laser light source system of claim 1, further comprising a synchronization electronic control system for synchronizing the rotating color wheel with the wavelength conversion device.

10. The laser light source system of claim 1, wherein the laser light source comprises an excitation light source and a first compensation light source, the excitation light source comprising a blue laser, a violet laser, or an ultraviolet laser; the first compensation light source comprises a red light laser and/or a green light laser; and after passing through the rotating color wheel, the laser emitted by the first compensation light source and the second excitation light are recovered by the light recovery device together, so that light combination with the excited light is realized.

11. The laser light source system according to claim 1, further comprising a second compensation light source disposed on a side of the light recovery device away from the first dichroic mirror; the light recovery device comprises a second dichroic mirror, and the second dichroic mirror is used for combining the compensation light emitted by the second compensation light source and the second excitation light to the first dichroic mirror.

12. A projector comprising the laser light source system according to any one of claims 1 to 11.

13. An illumination device characterized by comprising the laser light source system according to any one of claims 1 to 11.

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