CN114777035A

CN114777035A - Laser light source and lighting device

Info

Publication number: CN114777035A
Application number: CN202210319245.5A
Authority: CN
Inventors: 王强
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-22

Abstract

The application discloses laser source and lighting device belongs to the projection display field. The laser light source includes: the device comprises a laser, a light splitting component, a reflecting mirror, a light guide lens, a light combining lens, a first fluorescent component and a second fluorescent component. The laser beam emitted by the laser in the laser source can generate white light only through the matching of the light splitting component, the reflecting mirror, the light guide lens, the light combining lens, the first fluorescent component and the second fluorescent component. Therefore, the number of optical devices included in the laser light source is reduced, and the volume of the whole laser light source is reduced. Therefore, the overall volume of the lighting device integrated with the laser light source is small.

Description

Laser light source and lighting device

Technical Field

The application relates to the field of projection display, in particular to a laser light source and a lighting device.

Background

With the development of the optoelectronic technology, the color rendering of the light emitted by the lighting device is more and more required. High color rendering illumination devices are commonly used in medical lighting and projection displays.

Currently, lighting devices generally comprise: laser light sources and other optical components. The laser light source generally includes: the device comprises a laser, a diffusion sheet, a dichroic mirror, a collimating lens group, a fluorescent color wheel and a relay loop lens group. The fluorescent color wheel has a laser transmission area and an excitation area coated with fluorescent powder. The relay loop lens group includes: the optical path turning system consists of a plurality of lenses and a plurality of reflectors. Laser beams emitted by the laser are diffused by the diffusion sheet, penetrate through the dichroic mirror, are collimated by the collimating lens group and are guided to the fluorescent color wheel. When the laser beam irradiates the laser transmission area on the fluorescent color wheel, the laser beam penetrates through the laser transmission area, is bent by the relay circuit mirror group and is emitted out through the dichroic mirror. When the laser beam irradiates the excitation area coated with the fluorescent powder, the laser beam excites the fluorescent powder to emit fluorescent light, and the fluorescent light is guided to the dichroic mirror through the collimating mirror group after being reflected. The laser beam reflected by the dichroic mirror is combined with the laser beam transmitted through the dichroic mirror and guided to other optical components (e.g., a light uniformizing component) at the rear end.

However, the existing laser light source includes many optical devices, which results in a large volume of the whole laser light source, and further results in a large volume of the whole illumination device.

Disclosure of Invention

The embodiment of the application provides a laser light source and a lighting device. The problem that the whole volume of a laser light source in the prior art is large can be solved, the technical scheme is as follows:

in one aspect, a laser light source is provided, the laser light source comprising:

the device comprises a laser, a light splitting component, a reflecting mirror, a light guide lens, a light combining lens, a first fluorescent component and a second fluorescent component;

the laser is used for emitting laser beams to the light splitting component;

the light splitting component is used for guiding a first laser in the laser beam to the reflecting mirror and guiding a second laser in the laser beam to the light guide lens group;

the reflector is used for guiding the first laser to the light combining lens group;

the light guide mirror group is used for guiding one part of the second laser to the first fluorescent component and guiding the other part of the second laser to the second fluorescent component;

the first fluorescent component is used for reflecting first fluorescent light to the light guide mirror group under the excitation action of part of the second laser;

the second fluorescence component is used for reflecting second fluorescence to the light guide mirror group under the excitation action of the other part of the second laser;

the light guide lens group is also used for guiding the first fluorescence and the second fluorescence to the light combination lens group;

the light combining lens group is used for combining the first laser, the first fluorescence and the second fluorescence.

In another aspect, there is provided a lighting device including:

the laser source is any one of the laser sources given in the above.

The beneficial effects that technical scheme that this application embodiment brought include at least:

a laser light source, comprising: the device comprises a laser, a light splitting component, a reflecting mirror, a light guide lens, a light combining lens, a first fluorescent component and a second fluorescent component. Because the laser beam emitted by the laser in the laser source only needs to pass through the matching of the light splitting component, the reflecting mirror, the light guide lens group, the light combining lens group, the first fluorescent component and the second fluorescent component, the white light can be generated. Therefore, the number of optical devices included in the laser light source is reduced, and the volume of the whole laser light source is reduced. Therefore, the overall volume of the lighting device integrated with the laser light source is small. In addition, since the laser in the laser light source adopts the LD laser, the etendue of the LD laser is small. Therefore, the subsequent optical system can receive light conveniently, and the utilization efficiency of light energy is effectively improved.

Drawings

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

Fig. 1 is a schematic structural diagram of a laser light source provided in an embodiment of the present application;

fig. 2 is a schematic arrangement diagram of optical devices in a laser light source according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram illustrating an arrangement of optical devices in another laser light source provided in an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating an arrangement of optical devices in another laser light source provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another laser light source provided in an embodiment of the present application;

fig. 6 is a block diagram of a lighting device according to an embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be 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 concepts of the application by those skilled in the art with reference to specific embodiments.

Detailed Description

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

Referring to fig. 1, fig. 1 is a schematic structural diagram of a laser light source according to an embodiment of the present disclosure. The laser light source 000 may include: the laser comprises a laser 100, a light splitting component 200, a reflecting mirror 300, a light guide mirror group 400, a light combining mirror group 500, a first fluorescent component 600 and a second fluorescent component 700.

The laser 100 in the laser light source 000 may be used to emit a laser beam to the light splitting assembly 200.

The light splitting assembly 200 in the laser light source 000 may be located on the light exit side of the laser 100, and may be configured to guide a first laser light in the laser light beam emitted by the laser 100 to the reflector 300 in the laser light source 000, and guide a second laser light in the laser light beam to the light guide lens group 400.

The mirror 300 in the laser source 000 may be used to direct the first laser light in the laser beam to the light combining mirror 500.

The light guide mirror group 400 in the laser light source 000 may be used to guide a portion of the second laser light in the laser light beams emitted by the laser 100 to the first fluorescent device 600, and guide another portion of the second laser light to the second fluorescent device 700.

The first fluorescent light assembly 600 in the laser light source 000 can be used to reflect the first fluorescent light to the light guiding mirror assembly 400 under the excitation of a portion of the second laser light.

The second fluorescent light assembly 700 in the laser light source 000 can be used to reflect the second fluorescent light to the light guiding mirror assembly 400 under the excitation of another part of the second laser light.

The light guide lens assembly 400 in the laser light source 000 may also be configured to guide both the first fluorescence generated by exciting the first fluorescent assembly 600 with a portion of the second laser and the second fluorescence generated by exciting the second fluorescent assembly 700 with another portion of the second laser to the light combining lens assembly 500.

The light combining lens group 500 in the laser light source 000 may be configured to combine the first laser light, the first fluorescence generated by excitation, and the second fluorescence in the laser light beam, and emit the combined laser light beam.

The laser 100 in the laser light source 000 may be configured to emit blue laser light to the light splitting assembly 200, where the wavelength of the blue laser light may be 445 nm to 470 nm. In this way, the fluorescent components (i.e., the first fluorescent component and the second fluorescent component) are excited by the blue light with the short wavelength to generate fluorescence, and the blue light is combined with the first fluorescent light and the second fluorescent light (e.g., one of the first fluorescent light and the second fluorescent light is red fluorescent light, and the other one is green fluorescent light) to form white light, and the color rendering property of the white light formed after the light combination is good. For example, the Laser 100 may be a semiconductor (LD) Laser, which emits Laser beams with good directivity and controllability and a small etendue. Thus, the etendue of the laser beam emitted from the LD laser is small. Therefore, the subsequent optical system can receive light conveniently, and the utilization efficiency of light energy is effectively improved. It should be noted that in other possible implementations, the laser 100 may also employ other types of lasers, such as a Light Emitting Diode (LED) laser.

In addition, the first laser light and the second laser light in the laser beam emitted by the laser 100 may be laser light of the same color, for example, both blue laser light. One part of the second laser is used for irradiating the first fluorescent component 600 to excite and generate first fluorescent light, the other part of the second laser is used for irradiating the second fluorescent component 700 to excite and generate second fluorescent light, and the first laser is used for combining the first fluorescent light and the second fluorescent light.

In the present application, the laser 100 in the laser light source 000 may emit a laser beam, and the laser beam is first split by the splitting component 200; then, the light splitting assembly 200 guides the first laser light in the laser beam to the reflecting mirror 300, and guides the second laser light in the laser beam to the light guide mirror group 400; then, the reflector 300 guides the first laser light to the light combining lens assembly 500, the light guide lens assembly 400 guides a part of the second laser light to the first fluorescent assembly 600, the first fluorescent assembly 600 generates first fluorescent light under the excitation of a part of the second laser light, and the first fluorescent light is guided to the light combining lens assembly 500 through the light guide lens assembly 400; the light guide lens group 400 further guides another part of the second laser light to the second fluorescent component 700, the second fluorescent component 700 generates second fluorescent light under the excitation of another part of the second laser light, and the second fluorescent light is guided to the light combining lens group 500 through the light guide lens group 400; finally, the first laser, the first fluorescence and the second fluorescence are combined at the light combining lens 500, and the light combining lens 500 emits the laser beam after light combination. In this case, since the laser beam emitted from the laser 100 in the laser source 000 only needs to pass through the light splitting assembly 200, the reflecting mirror 300, the light guiding mirror assembly 400, the light combining mirror assembly 500, the first fluorescent assembly 600 and the second fluorescent assembly 700, the white light can be generated. Therefore, the number of optical devices included in the laser light source 000 is reduced, and the volume of the entire laser light source 000 is reduced. In this way, the overall volume of the lighting device into which the laser light source 000 is integrated is made small. In addition, since the laser in the laser light source employs the LD laser, the etendue of the LD laser is small. Therefore, the subsequent optical system can receive light conveniently, and the utilization efficiency of light energy is effectively improved.

In summary, the embodiment of the present application provides a laser light source, which may include: the device comprises a laser, a light splitting component, a reflecting mirror, a light guide lens group, a light combining lens group, a first fluorescent component and a second fluorescent component. The laser beam emitted by the laser in the laser source can generate white light only through the matching of the light splitting component, the reflecting mirror, the light guide lens, the light combining lens, the first fluorescent component and the second fluorescent component. Therefore, the number of optical devices included in the laser light source is reduced, and the volume of the whole laser light source is reduced. Therefore, the overall volume of the lighting device integrated with the laser light source is small. In addition, since the laser in the laser light source employs the LD laser, the etendue of the LD laser is small. Therefore, the subsequent optical system can receive light conveniently, and the utilization efficiency of light energy is effectively improved.

Optionally, there are various realizations for the arrangement of the optical devices in the laser light source 000 in the embodiment of the present application, and the embodiment of the present application will be schematically described in the following two alternative realizations:

referring to fig. 2, fig. 2 is a schematic layout diagram of optical devices in a laser light source according to an embodiment of the present disclosure. When the light guide mirror assembly 400 and the light combining mirror assembly 500 in the laser light source 000 may each include a dichroic mirror, the laser 100, the light splitting assembly 200, and the reflecting mirror 300 in the laser light source 000 may be sequentially arranged along a target direction (Y-axis direction in the drawing). The light splitting assembly 200, the light guide lens assembly 400 and the first fluorescent assembly 600 may be sequentially arranged in a direction perpendicular to the target direction. The arrangement direction of the light combining lens assembly 500 and the reflecting mirror 300 may be perpendicular to the target direction, and the second fluorescent member 700, the light guiding lens assembly 400 and the light combining lens assembly 500 may be sequentially arranged in parallel to the target direction. That is, the arrangement direction of the light splitting assembly 200, the light guiding lens assembly 400 and the first fluorescent assembly 600 is the X-axis direction in the figure, and the arrangement direction of the light combining lens assembly 500 and the reflecting mirror 300 is the X-axis direction in the figure. The arrangement direction of the second fluorescent assembly 700, the light guiding lens assembly 400 and the light combining lens assembly 500 is the Y-axis direction in the figure.

The light splitting assembly 200 may be configured to transmit the first laser beam to the reflector 300 and reflect the second laser beam to the light guide mirror assembly 400. The light guiding lens assembly 400 can be used to transmit a part of the second laser light to the first fluorescent device 600 and reflect the first fluorescent light generated by exciting the first fluorescent device 600 to the light combining lens assembly 500. The light guiding lens assembly 400 can also be used to reflect another part of the second laser light to the second fluorescent device 700, and transmit the second fluorescent light generated by exciting the second fluorescent device 700 to the light combining lens assembly 500. The light combining lens group 500 is configured to reflect the first fluorescence and the second fluorescence, and transmit the first laser, so that the first laser, the first fluorescence, and the second fluorescence are combined at the light combining lens group 500 and then exit.

In this case, since the arrangement directions of the laser 100, the light splitting assembly 200 and the reflecting mirror 300 are perpendicular to the arrangement directions of the light splitting assembly 200, the light guiding mirror assembly 400 and the first fluorescent assembly 600, and perpendicular to the arrangement directions of the light combining mirror assembly 500 and the reflecting mirror 300. In addition, the arrangement directions of the second fluorescent assembly 700, the light guide lens assembly 400 and the light combining lens assembly 500 are parallel to the arrangement directions of the laser 100, the light splitting assembly 200 and the reflector 300. Therefore, the arrangement of the laser 100, the beam splitting mirror group 200, the reflecting mirror 300, the light guide mirror group 400, the light combining mirror group 500, the first fluorescent component 600 and the second fluorescent component 700 in the laser source 000 is compact, and the width of the laser source 000 in the X-axis direction in the figure is small, and the width in the Y-axis direction in the figure is also small. In this way, the volume of the entire laser light source 000 can be made small. In addition, the laser light source 000 in the embodiment of the present application does not need to arrange a relay loop mirror group in the optical path, so that the volume of the whole laser light source 000 is further reduced.

For example, a laser in the laser source 000 may emit a laser beam, and the laser beam is first split by the splitting assembly 200; then, the light splitting assembly 200 transmits the first laser light of the laser beam to the reflector 300, and reflects the second laser light to the light guide mirror assembly 400. Then, the reflector 300 reflects the first laser light to the light combining lens assembly 500, the light guide assembly 400 transmits a portion of the second laser light to the first fluorescent assembly 600, and the first fluorescent assembly 600 generates the first fluorescent light under the excitation of a portion of the second laser light. The first fluorescent light is reflected by the first fluorescent light assembly 600 to the light guiding lens assembly 400, and the light guiding lens assembly 400 reflects the first fluorescent light to the light combining lens assembly 500. The light guide lens assembly 400 reflects another part of the second laser light to the second fluorescent assembly 700, and the second fluorescent assembly 700 generates second fluorescent light under the excitation of the other part of the second laser light. The second fluorescent light is reflected by the second fluorescent light assembly 700 to the light guiding lens assembly 400, and the light guiding lens assembly 400 transmits the second fluorescent light to the light combining lens assembly 500. Finally, the first laser, the first fluorescence and the second fluorescence are combined at the light combining lens group 500, and the light combining lens group 500 emits the laser beam after light combination. For example, the light splitting component 200 in the laser light source 000 may be a transmission mirror, and the transmittance and the reflectivity of the transmission mirror can be changed by designing different film layers on the transmission mirror in actual needs.

Optionally, as shown in fig. 2, an included angle α 1 between a mirror surface of the light splitting assembly 200 in the laser light source 000 and a direction in which the laser beam emitted by the laser 100 enters the light splitting assembly 200 may be 45 degrees; an included angle α 2 between the mirror surface of the reflector 300 and the direction in which the first laser is incident on the reflector 300 may be 45 degrees, and the light splitting assembly 200 is parallel to the mirror surface of the reflector 300; an included angle α 3 between the mirror surface of the light guide lens group 400 and the direction in which the first fluorescent light enters and emits to the light guide lens group 400 may be 45 degrees; an included angle α 4 between the mirror surface of the light combining lens assembly 500 and the direction of the first fluorescent light incident on the light combining lens assembly 500 may be 45 degrees.

Referring to fig. 3, fig. 3 is a schematic layout diagram of optical devices in another laser light source according to an embodiment of the present application. When the light guiding mirror group 400 and the light combining mirror group 500 in the laser light source 000 each include two dichroic mirrors, the light guiding mirror group 400 may include: first dichroic mirror 401 and second dichroic mirror 402, light combining group 500 may include: third dichroic mirror 501 and fourth dichroic mirror 502. Among them, the light splitting assembly 200 and the reflecting mirror 300 in the laser light source 000 may be sequentially arranged along a target direction (i.e., a Y-axis direction in the drawing). First fluorescent member 600, first dichroic mirror 401, and third dichroic mirror 501 may be arranged in order in parallel to the target direction. Second fluorescent member 700, second dichroic mirror 402, and fourth dichroic mirror 502 may be arranged in order in parallel to the target direction. Light splitting assembly 200, first dichroic mirror 401, and second dichroic mirror 402 may be sequentially arranged in a direction perpendicular to the target direction, and reflecting mirror 300, third dichroic mirror 501, and fourth dichroic mirror 502 may be sequentially arranged in a direction perpendicular to the target direction. That is, the arrangement direction of first fluorescent member 600, first dichroic mirror 401, and third dichroic mirror 501 may be the Y-axis direction in the drawing. The arrangement direction of second fluorescent light assembly 700, second dichroic mirror 402, and fourth dichroic mirror 502 may be the Y-axis direction in the drawing. The arrangement direction of the light splitting assembly 200, the first dichroic mirror 401, and the second dichroic mirror 402 may be the X-axis direction in the drawing, and the arrangement direction of the reflecting mirror 300, the third dichroic mirror 501, and the fourth dichroic mirror 502 may be the X-axis direction in the drawing.

For example, the laser 100 in the laser light source 000 may emit a laser beam, and the laser beam is first split by the splitting assembly 200; then, the optical splitting assembly 200 guides the first laser light in the laser beam to the reflecting mirror 300, and guides the second laser light to the first dichroic mirror 401. Then, reflecting mirror 300 reflects the first laser light toward third dichroic mirror 501, and first dichroic mirror 401 reflects a part of the second laser light toward first fluorescent member 600, and excites first fluorescent member 600 to generate first fluorescent light. First fluorescent light assembly 600 reflects the first fluorescent light toward first dichroic mirror 401 and first dichroic mirror 401 transmits the first fluorescent light toward third dichroic mirror 501. Third dichroic mirror 501 transmits the first laser light toward fourth dichroic mirror 502, and reflects the first fluorescent light toward fourth dichroic mirror 502. In addition, first dichroic mirror 401 transmits another part of the second laser light to second dichroic mirror 402, and second dichroic mirror 402 reflects another part of the second laser light to second fluorescent component 700, and excites second fluorescent component 700 to generate second fluorescent light. Second fluorescent light assembly 700 reflects the second fluorescent light toward second dichroic mirror 402 and second dichroic mirror 402 transmits the second fluorescent light toward fourth dichroic mirror 502. Finally, the first laser, the first fluorescence and the second fluorescence are combined at the light combining lens group 500. For example, the light splitting component in the laser light source may be a transmission mirror, and the transmittance and reflectance of the transmission mirror may be changed by designing different film layers on the transmission mirror in actual needs. As shown in fig. 3, the fourth dichroic mirror 502 in the light combining group 500 may be a dichroic mirror that transmits the first laser light and the first fluorescent light and reflects the second fluorescent light. In other possible implementation manners, the fourth dichroic mirror 502 may also be a dichroic mirror that reflects the first laser light and the first fluorescent light and transmits the second fluorescent light, which is not limited in this embodiment of the application.

Alternatively, as shown in fig. 3, an included angle α 5 between the mirror surface of the light splitting assembly 200 in the laser light source 000 and the direction in which the laser beam emitted by the laser 100 enters the light splitting assembly 200 may be 45 degrees; an included angle α 6 between the mirror surface of the reflector 300 and the direction in which the first laser is incident on the reflector 300 may be 45 degrees, and the light splitting assembly 200 is parallel to the mirror surface of the reflector 300; an included angle α 7 between the mirror surface of the first dichroic mirror 401 in the light guiding mirror group 400 and the direction in which the first fluorescent light is incident to the first dichroic mirror 401 may be 45 degrees; an included angle α 8 between the mirror surface of the second dichroic mirror 402 in the light guide mirror group 400 and the direction in which the second fluorescent light is incident to the second dichroic mirror 402 may be 45 degrees; an included angle α 9 between the mirror surface of the third dichroic mirror 501 in the light combining mirror group 500 and the direction in which the first fluorescent light is incident to the third dichroic mirror 501 may be 45 degrees; an included angle α 10 between the mirror surface of the fourth dichroic mirror 502 in the light combining set 500 and the direction in which the second fluorescent light is incident to the fourth dichroic mirror 502 may be 45 degrees.

It should be noted that, in the second alternative implementation manner, there are many possible situations of arrangement positions of the laser 100 and other optical devices in the laser light source 0000, and the following embodiments of the present application will be schematically described in the following two possible situations:

first possible case, as shown in fig. 3, the laser 100, the light splitting assembly 200, and the reflecting mirror 300 in the laser light source 000 may be arranged in order along the target direction. The light splitting assembly 200 may be configured to transmit a first laser beam of the laser beam to the reflecting mirror 300 and reflect a second laser beam of the laser beam to the light guiding mirror group 400.

Referring to fig. 4, fig. 4 is a schematic layout diagram of optical devices in another laser light source according to an embodiment of the present disclosure. The laser 100, the light splitting mirror group 200 and the light guide mirror group 400 in the laser light source 000 may be sequentially arranged in a direction perpendicular to the target direction, that is, the arrangement direction of the laser 100, the light splitting mirror group 200 and the light guide mirror group 400 is the X-axis direction in the figure. The light splitting assembly 200 may be configured to reflect a first laser light of the laser light beams to the reflecting mirror 300, and transmit a second laser light of the laser light beams to the light guiding mirror group 400.

It should be noted that, in the first possible case and the second possible case, for the way that the laser beam emitted by the laser 100 is split by the light splitting assembly 200 and then transmitted in the subsequent optical path, reference may be made to the description in the second optional implementation way, and details are not described here again.

In the embodiment of the present application, please refer to fig. 5, and fig. 5 is a schematic structural diagram of another laser light source provided in the embodiment of the present application. When the laser 100, the light splitting assembly 200, and the reflecting mirror 300 in the laser light source 000 are sequentially arranged along the target direction, and the arrangement direction of the laser 100, the first fluorescent assembly 600, and the second fluorescent assembly 700 is perpendicular to the target direction, the laser light source 000 may further include: the heat sink assembly 800. The heat sink assembly 800 may simultaneously contact the laser 100, the first phosphor assembly 600 and the second phosphor assembly 700. In this case, a certain amount of heat is generated by the laser 100 during the emission of the laser beam. In addition, during a process that a part of the second laser irradiates the first fluorescent member 600 to excite the first fluorescent light, and during a process that another part of the second laser irradiates the second fluorescent member 700 to excite the second fluorescent light, a part of the light energy is converted into heat energy. Therefore, in order to ensure the normal operation of the laser 100, the first fluorescent lamp assembly 600 and the second fluorescent lamp assembly 700, a heat dissipation assembly is required to dissipate heat of the laser 100, the first fluorescent lamp assembly 600 and the second fluorescent lamp assembly 700. In the present application, the laser 100, the first fluorescent member 600 and the second fluorescent member 700 of the laser light source 000 are arranged in a direction perpendicular to the target direction, so that the laser 100, the first fluorescent member 600 and the second fluorescent member 700 can share one heat dissipation member 800 of the laser light source 000. In this way, heat generated by the laser 100, the first fluorescent assembly 600 and the second fluorescent assembly 700 during operation can be dissipated. And a heat dissipation component does not need to be arranged on the laser 100, the first fluorescent component 600 and the second fluorescent component 700, so that the overall volume of the laser light source 000 is effectively reduced.

Optionally, because the second laser in the laser beams emitted by the laser 100 is used to irradiate the first fluorescent component 600 and the second fluorescent component 700 respectively to excite the first fluorescent light and the second fluorescent light, the first laser is used to combine the first fluorescent light and the second fluorescent light at the light combining lens group 500 to form white light. In addition, a part of light energy of the second laser is converted into heat energy in the process of respectively irradiating the first fluorescent assembly 600 and the second fluorescent assembly 700 to excite the fluorescence, and the first laser (i.e., blue light) has a small influence on the synthesis of the white light. Therefore, the proportion of the first laser light in the laser beam emitted by the laser 100 may be smaller than the proportion of the second laser light in the laser beam.

In the embodiment of the present application, a ratio of a first laser light in the laser beam to a second laser light in the laser beam may be 1 to 9. For example, the first laser may be a% in the laser beam and the second laser may be b% in the laser beam. For example, 10% of the first laser light is reflected by the reflector 300 to the light combining lens assembly 500, and 90% of the second laser light is used to excite the first fluorescent assembly 600 and the second fluorescent assembly 700 to generate the first fluorescent light and the second fluorescent light, which are combined with the first laser light. The ratio of the first laser beam and the second laser beam in the laser beam may be adjusted appropriately according to the difference in the color temperature of the laser beam, and this embodiment is not particularly limited thereto. For example, the color temperature of blue is generally high, and in the case that the color temperature set in actual design needs is low, the color temperature can be realized by increasing the proportion of the first laser (i.e. blue light) and reducing the proportion of the second laser; when the set color temperature is higher, the method can be realized by reducing the proportion of the first laser and increasing the proportion of the second laser.

In the embodiment of the present application, the first fluorescent member 600 in the laser light source 000 may include: a first reflecting portion 601, and a first fluorescent portion 602 located at a side of the first reflecting portion 601 close to the light guiding lens group 400. The second fluorescent assembly 700 may include: a second reflecting portion 701, and a second fluorescent portion 702 located on a side of the second reflecting portion 701 close to the light guide lens group 400. In this way, when a part of the second laser light in the laser beam is irradiated onto the first fluorescent portion 602 in the first fluorescent member 600, the laser beam excites the fluorescent material located on the first fluorescent portion 602, the fluorescent material generates the first fluorescent light under the excitation of the laser beam, and the first reflecting portion 602 reflects the first fluorescent light. When another part of the second laser light in the laser light beams irradiates the second fluorescent portion 702 in the second fluorescent member 700, the laser light beams excite the fluorescent material located on the second fluorescent portion 702, the fluorescent material generates second fluorescent light under the excitation of the laser light beams, and the second fluorescent light is reflected by the second reflecting portion 702.

In the present application, both first phosphor assembly 600 and second phosphor assembly 700 may be stationary phosphor assemblies, e.g., stationary phosphor plates. The fixed fluorescent components (i.e., the first fluorescent component and the second fluorescent component) do not need to be provided with a driving part, which is beneficial to reducing the occupied space of the fluorescent components in the laser light source 000 and is beneficial to the miniaturization design of the laser light source 000. In some special optical systems, the non-fixed fluorescent components alternately generate fluorescent light under the driving of the driving component, but the driving component may vibrate when driving the fluorescent components to rotate, which may affect the reliability of the system. And the fixed fluorescent component can effectively avoid the bad phenomenon that the fluorescent component vibrates relatively to the non-fixed fluorescent component.

Optionally, the fluorescent materials on the first fluorescent part 602 in the first fluorescent assembly 600 and the second fluorescent part 702 on the second fluorescent assembly 700 may be separated fluorescent powders that are bonded into layers by organic adhesives such as silica gel or epoxy resin; or, the separated phosphor is bonded into layers by an inorganic adhesive such as glass; alternatively, the phosphor material may be a phosphor ceramic, which is a structure having a continuous ceramic as a medium and phosphor particles distributed in the ceramic. The fluorescent material is not particularly limited in the examples of the present application.

Alternatively, the laser 100 in the laser light source 000 may be a laser for emitting blue laser light, and both the first laser light and the second laser light are blue laser light. One of the first fluorescence generated by the first fluorescence assembly 600 excited by a part of the second laser light and the second fluorescence generated by the second fluorescence assembly 700 excited by another part of the second laser light may be green fluorescence and the other may be red fluorescence. For example, the first fluorescence may be red fluorescence, and the second fluorescence may be green fluorescence; alternatively, the first fluorescence may be green fluorescence, and the second fluorescence may be red fluorescence, which is not specifically limited in this application. In the following examples of the present application, the first fluorescence is schematically illustrated as green fluorescence, and the second fluorescence is red fluorescence. Thus, the blue laser irradiates the first fluorescent member 600, and the green phosphor on the first fluorescent member 600 is excited to generate green fluorescence. The second fluorescent member 700 is irradiated by the blue laser light, and the red phosphor on the second fluorescent member 700 is excited to generate red fluorescence.

In the embodiment of the present application, when the first fluorescent light is green fluorescent light and the second fluorescent light is red fluorescent light, a ratio of an occupation ratio of laser light directed to the first fluorescent member 600 in the second laser light to an occupation ratio of laser light directed to the second fluorescent member 700 in the second laser light may be 6 to 4. For example, the first laser may be c% and the second laser may be d% in the laser beam. For example, c is 60%, d is 40, that is, 60% of the second laser light is used to excite the first fluorescent component 600 to generate the first fluorescent light, and 40% of the second laser light is used to excite the second fluorescent component 700 to generate the second fluorescent light. In order to facilitate the light collection of the subsequent optical system, it is necessary to ensure that the etendue of the fluorescence excited by the fluorescence component is small. However, in order to ensure a small etendue, it is necessary to ensure that the spot size of the second laser light incident on the fluorescent member is small. This results in a greater optical power density of the second laser light incident on the phosphor element. For the red phosphor on the first phosphor assembly 600 and the green phosphor on the second phosphor assembly 700, the red phosphor has a lower ability to withstand high optical power density laser. For this reason, the proportion of the laser light directed to the second fluorescent member 700 in the second laser light is made smaller than the proportion of the laser light directed to the first fluorescent member 600 in the second laser light in the present application. In addition, in actual needs, the ratio of the laser light guided to the second fluorescent member 700 in the second laser light may be larger than the ratio of the laser light guided to the first fluorescent member 600 in the second laser light, which is not limited in this embodiment of the present application.

To sum up, the embodiment of the present application provides a laser light source, which may include: the device comprises a laser, a light splitting component, a reflecting mirror, a light guide lens, a light combining lens, a first fluorescent component and a second fluorescent component. The laser beam emitted by the laser in the laser source can generate white light only through the matching of the light splitting component, the reflecting mirror, the light guide lens, the light combining lens, the first fluorescent component and the second fluorescent component. Therefore, the number of optical devices included in the laser light source is reduced, and the volume of the whole laser light source is reduced. Therefore, the overall volume of the lighting device integrated with the laser light source is small. In addition, since the laser in the laser light source adopts the LD laser, the etendue of the LD laser is small. Therefore, the subsequent optical system can receive light conveniently, and the utilization efficiency of light energy is effectively improved.

An embodiment of the present application further provides a lighting device, please refer to fig. 6, and fig. 6 is a block diagram of a structure of the lighting device provided in the embodiment of the present application. The lighting device may include: a laser light source 000 and a dodging assembly 001. The laser light source 000 may be any of the laser light sources given in the above embodiments. The laser beams emitted by the laser light source 000 are combined and then guided to the light uniformizing assembly 001, and the light uniformizing assembly 001 can uniformize the laser beams. The illumination device can be applied to medical illumination. For example, the light homogenizing assembly 001 may be a fly-eye lens or a light guide, which is not specifically limited in this embodiment.

It should be noted that the laser light source 000 may also be applied to a laser projection apparatus to provide an illumination beam for imaging of the laser projection apparatus.

In this application, the terms "first" and "second" 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 only to illustrate the alternative embodiments of the present application, and should not be construed as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A laser light source, comprising: the device comprises a laser, a light splitting component, a reflecting mirror, a light guide lens, a light combining lens, a first fluorescent component and a second fluorescent component;

the laser is used for emitting laser beams to the light splitting component;

the second fluorescent component is used for reflecting second fluorescent light to the light guide mirror group under the excitation action of the other part of the second laser;

2. The laser light source of claim 1, wherein when the light guiding lens group and the light combining lens group each include a dichroic mirror, the laser, the light splitting assembly and the reflecting mirror are sequentially arranged along the target direction, the light splitting assembly, the light guiding lens group and the first fluorescent assembly are sequentially arranged along a direction perpendicular to the target direction, the light combining lens group and the reflecting mirror are arranged along a direction perpendicular to the target direction, and the second fluorescent assembly, the light guiding lens group and the light combining lens group are sequentially arranged along a direction parallel to the target direction;

the light splitting assembly is used for transmitting the first laser to the reflecting mirror and reflecting the second laser to the light guide mirror group; the light guide lens group is used for transmitting one part of the second laser to the first fluorescent light assembly and reflecting the first fluorescent light to the light combination lens group; the light guide lens group is further used for reflecting the other part of the second laser to the second fluorescent light assembly and transmitting the second fluorescent light to the light combining lens group.

3. The laser light source of claim 1, wherein the light guide mirror group comprises: first dichroic mirror and second dichroic mirror, the group of light combination mirrors includes: a third dichroic mirror and a fourth dichroic mirror;

the light splitting components and the reflecting mirrors are sequentially arranged along a target direction, the first fluorescent components, the first dichroic mirrors and the third dichroic mirrors are sequentially arranged along a direction parallel to the target direction, the second fluorescent components, the second dichroic mirrors and the fourth dichroic mirrors are sequentially arranged along a direction parallel to the target direction, the light splitting components, the first dichroic mirrors and the second dichroic mirrors are sequentially arranged along a direction perpendicular to the target direction, and the reflecting mirrors, the third dichroic mirrors and the fourth dichroic mirrors are sequentially arranged along a direction perpendicular to the target direction.

4. The laser light source of claim 3, wherein the laser, the beam splitting assembly and the reflector are sequentially arranged along the target direction, and the beam splitting assembly is configured to transmit the first laser light to the reflector and reflect the second laser light to the light guide lens group;

or the laser, the light splitting assembly and the light guide mirror group are sequentially arranged along the direction perpendicular to the target direction, and the light splitting assembly is used for reflecting the first laser to the reflector and transmitting the second laser to the light guide mirror group.

5. The laser light source according to claim 4, wherein when the laser, the beam splitting assembly, and the reflecting mirror are sequentially arranged along the target direction, the arrangement direction of the laser, the first fluorescent assembly, and the second fluorescent assembly is perpendicular to the target direction, the laser light source further comprising: a heat sink assembly in simultaneous contact with the laser, the first phosphor assembly, and the second phosphor assembly.

6. The laser light source according to any one of claims 1 to 5, wherein the proportion of the first laser light in the laser beam is smaller than the proportion of the second laser light in the laser beam.

7. The laser light source of claim 6, wherein the ratio of the first laser light to the second laser light in the laser beam is 1: 9.

8. The laser light source according to any one of claims 1 to 5, wherein the laser is a blue laser, the first laser light and the second laser light are both blue laser light, and one of the first fluorescence and the second fluorescence is green fluorescence and the other is red fluorescence.

9. The laser light source of claim 8, wherein when the first fluorescent light is green fluorescent light and the second fluorescent light is red fluorescent light, a ratio of laser light directed to the first fluorescent member to a ratio of laser light directed to the second fluorescent member is 6: 4.

10. An illumination device, comprising: a laser light source and a dodging assembly, wherein the laser light source is the laser light source in any one of the claims 1 to 9.