CN113495419A

CN113495419A - Light source system and projection display device

Info

Publication number: CN113495419A
Application number: CN202010264969.5A
Authority: CN
Inventors: 胡飞; 吴超; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2021-10-12
Also published as: WO2021204035A1

Abstract

The application discloses a light source system and a projection display device, wherein the light source system comprises a first light source component, a second light source component, a wavelength conversion device and a light uniformizing device, wherein the first light source component is used for emitting at least two beams of exciting light; the second light source component is used for emitting at least one beam of laser; the wavelength conversion device is arranged on the light path of the at least two beams of exciting light and is used for converting the received at least two beams of exciting light into at least two beams of receiving laser; the dodging device is used for dodging the excited light and the laser; the laser light and the laser respectively form a laser spot and a laser spot on the light incident side of the light evening device, the laser spot is positioned between two adjacent laser spots, the two adjacent laser spots are symmetrical about the laser spot, or the laser spot is positioned between the two adjacent laser spots, and the two adjacent laser spots are symmetrical about the laser spot.

Description

Light source system and projection display device

Technical Field

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

Background

With the continuous development of projection display technology, people have higher and higher requirements on parameters of projection equipment, and High brightness, HDR (High Dynamic Range), High resolution and as large color gamut as possible become very popular concepts in the market of projector products at present. Compared with a bulb Light source, an LED (Light Emitting Diode) Light source and a pure laser Light source, the projection device using the laser fluorescent Light source has the advantages of long service life, high brightness and high cost performance, and is an ideal choice for the current projector Light source. However, the spectral wavelength range of the fluorescence generated by laser excitation is wide, and the range of the color gamut is more limited than that of a pure laser light source.

At present, for a laser fluorescent light source, in order to make the color gamut range reach the rec.709 or DCI color gamut standard, a commonly used method is to perform electronic correction and add a filter in a light path, as shown in fig. 1, blue laser is used as excitation light in the laser fluorescent light source, the excitation light incident to a color wheel excites fluorescent powder to generate green fluorescent light and red fluorescent light, the wavelength range of the fluorescent light is wider, and the color is not saturated enough, so that parts with long wavelength of green light and short wavelength of red light are filtered by a notch filter, thereby improving the color coordinates of the green light and the red light.

The method for expanding the color gamut can reach the Rec.709 or DCI color gamut standard, but a part of fluorescence is filtered in the process of using the notch filter and electronic correction, so that the luminous efficiency of projection equipment is reduced, the final brightness is reduced, and the performance of the projection product is limited. In order to further solve the contradiction between the expansion of the color gamut range and the improvement of the brightness, the addition of a red laser module or the addition of a red laser module and a green laser module in the light source is proposed. As shown in fig. 2, a red laser module is added to the light source, and the red light color coordinate is adjusted and the red light ratio is increased by combining the red laser and the red fluorescent light, so that the proportion of the red fluorescent light filtered by the notch filter can be reduced, and the light efficiency of the projector can be improved. However, in the light homogenizing and mixing process of the fluorescent light and the laser light, the effect of uniform mixing is often difficult to achieve, and the final projection display is not uniform.

Disclosure of Invention

The problem that this application mainly solved provides a light source system and projection display device, can promote the homogeneity of light source system light-emitting to improve projection display's homogeneity.

In order to solve the above technical problem, the present application provides a light source system, which includes a first light source assembly, a second light source assembly, a wavelength conversion device, and a light uniformizing device; the first light source component is used for emitting at least two beams of exciting light; the second light source component is used for emitting at least one beam of laser; the wavelength conversion device is arranged on the light path of the at least two beams of exciting light and is used for converting the received at least two beams of exciting light into at least two beams of receiving laser; the dodging device is arranged on the light path of the excited light and the laser and is used for dodging the excited light and the laser; the laser spot is positioned between two adjacent laser spots, two adjacent laser spots are symmetrical with respect to the laser spot, or the laser spots are positioned between two adjacent laser spots, and the two adjacent laser spots are symmetrical with respect to the laser spots.

In order to solve the above technical problem, another technical solution adopted by the present application is to provide a projection display device, which includes a light source system, wherein the light source system is the above light source system.

Through the scheme, the beneficial effects of the application are that: generate two at least bundles of exciting lights through first light source subassembly and be used for arousing wavelength conversion equipment and produce corresponding laser that receives, the laser that receives that wavelength conversion equipment produced jets into even light device, it receives the laser spot to form on the income light side of even light device, second light source subassembly produces laser and incides to even light device, it forms the laser spot to be gone into on the income light side of even light device, the laser facula is located between two adjacent laser facula that receive, these two adjacent receive the laser facula symmetry about the laser facula, perhaps receive the laser facula to be located between two adjacent laser facula, these two adjacent laser facula are symmetrical about receiving the laser facula, so set up, can promote the homogeneity of the excited light sum laser of combining light behind even light, thereby improve projection display's homogeneity.

Drawings

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

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

FIG. 2 is a schematic diagram of another prior art laser fluorescence light source;

FIG. 3 is a schematic structural diagram of a first embodiment of a light source system provided by the present application;

FIG. 4 is a schematic structural diagram of a second embodiment of a light source system provided by the present application;

FIG. 5 is a schematic diagram illustrating the distribution of light spots at the light incident side of the square rod in the embodiment shown in FIG. 4;

FIG. 6 is a schematic structural diagram of a third embodiment of a light source system provided in the present application;

FIG. 7 is a schematic diagram illustrating the distribution of light spots at the light incident side of the square rod in the embodiment shown in FIG. 6;

FIG. 8 is another schematic view of the spot distribution on the light-incident side of the square rod in the embodiment shown in FIG. 6;

FIG. 9 is a schematic view of the spot distribution at the light incident side of the square rod in the embodiment shown in FIG. 6;

FIG. 10 is a schematic structural diagram of a fourth embodiment of a light source system provided in the present application;

FIG. 11 is a schematic diagram illustrating the distribution of spots on the light-incident side of the fly-eye lens in the embodiment shown in FIG. 10;

FIG. 12 is another schematic diagram illustrating the distribution of spots on the light-incident side of the fly-eye lens shown in FIG. 10;

FIG. 13 is a schematic view of the light spot distribution on the light-incident side of the fly-eye lens in the embodiment shown in FIG. 10;

FIG. 14 is a further schematic diagram illustrating the distribution of light spots on the light-incident side of the fly-eye lens shown in FIG. 10;

fig. 15 is a schematic structural diagram of a fifth embodiment of a light source system provided in the present application;

FIG. 16 is a schematic structural diagram of the wavelength conversion unit, the scattering unit and the light filtering region in the embodiment shown in FIG. 15;

FIG. 17 is another schematic diagram of the wavelength converting unit, the scattering unit and the light filtering region in the embodiment of FIG. 15;

FIG. 18 is a schematic structural view of a first light directing element in the embodiment shown in FIG. 15;

FIG. 19 is a schematic diagram illustrating the distribution of light spots at the light incident side of the square rod in the embodiment of FIG. 15;

FIG. 20 is another schematic view of the spot distribution on the light-incident side of the square rod in the embodiment shown in FIG. 15;

fig. 21 is a schematic structural diagram of a sixth embodiment of a light source system provided in the present application;

FIG. 22 is a schematic structural diagram of the wavelength conversion unit, the scattering unit and the light filtering region in the embodiment shown in FIG. 21;

FIG. 23 is a schematic diagram illustrating the distribution of spots on the light-incident side of the fly-eye lens in the embodiment shown in FIG. 21;

fig. 24 is a schematic structural diagram of a seventh embodiment of a light source system provided in the present application;

FIG. 25 is a schematic structural diagram of the wavelength conversion unit, the scattering unit and the light filtering region in the embodiment shown in FIG. 24;

FIG. 26 is a schematic view of the light spot distribution at the light-in side of the square rod in the embodiment of FIG. 24;

fig. 27 is a schematic structural diagram of an embodiment of a projection display device provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The first embodiment is as follows:

referring to fig. 3, fig. 3 is a schematic structural diagram of a light source system according to a first embodiment of the present application, the light source system including: a first light source assembly 101, a second light source assembly 102, a wavelength conversion device 103, and a light uniformizing device 104.

The first light source assembly 101 is used for emitting at least two beams of excitation light, the first light source assembly 101 includes at least two first light emitters, each first light emitter is used for emitting one beam of excitation light, and the color of the excitation light can be blue. The first light emitter may be a blue laser or a blue light emitting diode, and the number of the lasers or the light emitting diodes in the first light source assembly 101 may be selected according to needs. In other embodiments, the excitation light may also be ultraviolet light or other colored light.

The second light source assembly 102 is configured to emit at least one laser beam, and the second light source assembly 102 includes at least one second light emitter, and the laser beam, as a supplementary light, may include a plurality of color laser beams, such as a red laser beam, a green laser beam, or a blue laser beam.

The wavelength conversion device 103 is disposed on an optical path of the at least two beams of excitation light, and is configured to convert the received at least two beams of excitation light into at least two beams of stimulated light, that is, process each beam of excitation light to obtain one beam of stimulated light; specifically, the excited light may be fluorescence, the wavelength conversion device 103 includes at least two wavelength conversion units, each of which is located on the optical path of one of the excitation lights, or the wavelength conversion device 103 includes one wavelength conversion unit, which receives at least two of the excitation lights emitted from the first light source assembly 101.

In an embodiment, the wavelength distributions of the at least two received laser beams emitted by the wavelength conversion device 103 are the same, and the wavelength distribution of the at least one laser beam emitted by the second light source module 102 is partially overlapped with the wavelength distributions of the at least two received laser beams emitted by the wavelength conversion device 103, and the laser beam is used as a complementary light of the received laser beam to adjust the color coordinate of the received laser beam.

The dodging device 104 is arranged on the light path of the excited light and the laser and is used for dodging the excited light and the laser; the light uniformizing device 104 can be a square rod or a fly-eye lens, etc., the excited light emitted by the wavelength conversion device 103 and the laser emitted by the second light source component 102 respectively form a laser receiving spot and a laser spot on the light incident side of the light uniformizing device 104, so as to realize the geometric light combination of the laser and the fluorescence, the laser spot is positioned between two adjacent laser receiving spots, and the two adjacent laser receiving spots are symmetrical with respect to the laser spot; or the laser receiving light spots are positioned between two adjacent laser light spots, and the two adjacent laser light spots are symmetrical with respect to the laser receiving light spots.

In an embodiment, the light source system further comprises a scattering device disposed in an optical path of the at least one laser beam for scattering the at least one laser beam. The scattering device is a scattering sheet or a substrate coated with a scattering layer and is used for transmitting and scattering laser light so as to eliminate the coherence of the laser light and further relieve the speckle effect generated by the laser light. Further, the wavelength conversion device 103 and the scattering device are located on the same plane and arranged side by side. The wavelength conversion device 103 and the scattering device are arranged side by side in space, so that the received laser light emitted by the wavelength conversion unit and the laser light emitted by the scattering element are arranged side by side in space, and the optical path reaching the light incident side of the dodging device 104 is the same; the received laser light emitted from the wavelength conversion unit and the laser light emitted from the scattering element are emitted from the light source system after being homogenized by the light homogenizing device 104.

In this embodiment, the first light source assembly 101 emits at least two excitation lights for exciting the wavelength conversion device 103 to emit the stimulated light, and the wavelength conversion device 103 emits the stimulated light into the dodging device 104; second light source subassembly 102 outgoing laser and incidenting to dodging device 104, receive laser and laser can form at the income light side of dodging device 104 and receive laser spot and laser spot, and the laser spot is located between two adjacent receipt laser faculas, this two adjacent receipt laser faculas are symmetrical about the laser facula, perhaps receive the laser spot to be located between two adjacent laser faculas, this two adjacent laser faculas are symmetrical about receiving the laser facula, so set up, can promote the homogeneity of the excited light and the laser of closed light behind the dodging, thereby improve the homogeneity of projection display.

Example two:

referring to fig. 4, fig. 4 is a schematic structural diagram of a second embodiment of the light source system provided in the present application, in which the first light source module includes a first laser 101a and a first laser 101b, the second light source module includes a second laser 102, the second laser 102 is located between the first laser 101a and the first laser 101b, and the wavelength conversion device includes a wavelength conversion unit 103a and a wavelength conversion unit 103 b. The light homogenizing assembly 104 in this embodiment is a square rod.

The excitation light emitted from the first laser 101a is laser light having a first wavelength distribution, the excitation light emitted from the first laser 101b is laser light having a third wavelength distribution, and the laser light emitted from the second laser 102 is laser light having a second wavelength distribution. Preferably, the first wavelength distribution and the third wavelength distribution are the same, that is, the colors of the excitation light emitted by the first laser 101a and the first laser 101b are the same.

The wavelength conversion unit 103a and the wavelength conversion unit 103b are transmissive wavelength conversion units. The

wavelength conversion units

103a and 103b may receive the excitation light having the first wavelength distribution and the third wavelength distribution emitted from the first laser 101a and the first laser 101b, respectively, and convert them into fluorescence having the fourth wavelength distribution and the fifth wavelength distribution, respectively; preferably, the fourth wavelength distribution and the fifth wavelength distribution are the same, that is, the color of the fluorescence emitted from the wavelength conversion unit 103a and the color of the fluorescence emitted from the wavelength conversion unit 103b are the same, and the second wavelength distribution of the laser light emitted from the second laser 102 partially overlaps with the fourth wavelength distribution of the fluorescence emitted from the wavelength conversion unit 103a and the fifth wavelength distribution of the fluorescence emitted from the wavelength conversion unit 103b, the laser light emitted from the second laser 102 is narrow-spectrum light, the fluorescence emitted from the wavelength conversion unit 103a and the wavelength conversion unit 103b is wide-spectrum light, and the wavelength distribution of the laser light partially overlaps with the wavelength distribution of the fluorescence, so that the laser light can be used as a complementary light of the fluorescence.

The light source system further includes an optical assembly 105, where the optical assembly 105 is disposed on a light path of the laser beam emitted by the wavelength conversion device and the laser beam emitted by the second light source assembly, and is configured to enable the laser beam and the laser beam to form an image on a light incident side of the light uniformizing device 104. Specifically, the optical assembly 105 processes the received laser light after receiving the received laser light output by the wavelength conversion device, and the processed received laser light is imaged on the light incident side of the dodging device 104 to form a received laser light spot; and the optical assembly 105 processes the laser light output by the second laser 102 after receiving the laser light, and the processed laser light is imaged on the light incident side of the dodging device 104 to form a laser spot. The optical assembly 105 may be a lens array composed of a plurality of relay lenses, and is configured to form the received laser light spot and the laser light spot on the light incident side of the square rod 104 by the received laser light emitted from the wavelength conversion unit 103a and the wavelength conversion unit 103b and the laser light emitted from the scattering device 106, respectively.

Further, with continued reference to fig. 4, the light source system further includes a scattering device 106 and three focusing lenses 107a-107c, the first focusing lens 107a is disposed on the optical path of the excitation light emitted from the first laser 101a and in front of the wavelength conversion unit 103 a; the second focusing lens 107b is arranged on the light path of the laser light emitted by the second laser 102 and in front of the scattering device 106; the third focusing lens 107c is disposed on the optical path of the excitation light emitted from the first laser 101b and in front of the wavelength conversion unit 103 b; the scattering device 106 is disposed on the optical path of the laser light and in front of the optical assembly 105, and is configured to scatter the laser light, so as to suppress speckle generated by the laser light, that is, to alleviate the speckle problem generated by the laser light emitted by the second laser 102. Preferably, the scattering device 106 is located in the same plane as the wavelength converting unit 103a and the wavelength converting unit 103 b.

In a specific embodiment, at least two first lasers and the second laser 102 are arranged at intervals in the first direction and/or the second direction of the array, the laser-receiving spots and the laser spots are arranged in the array on the light-entering side of the light uniformizing device 104, and the laser-receiving spots and the laser spots are arranged at intervals in the first direction and/or the second direction of the array, wherein the first direction and the second direction are perpendicular to each other. As shown in fig. 5, La1 and La2 are images of fluorescent spots formed by the fluorescence emitted from the wavelength conversion unit 103a and the wavelength conversion unit 103b on the light incident side of the square rod 104 through the relay lens, Lb is an image of a laser spot formed by the laser output from the scattering device 106 on the light incident side of the square rod 104 through the relay lens, and the fluorescent spots are symmetrically distributed on both sides of the laser spot, which is beneficial to improving the uniformity of a mixed spot obtained after the square rod 104 homogenizes light, and effectively improving the non-uniformity problem of geometric light combination.

In addition, in order to make the uniformity of the mixed light spot better, the size of the fluorescent light spot on the light incident side of the square rod 104 is equal to the size of the laser light spot; further, the center of one of the laser spots between two adjacent laser spots coincides with the center of the square bar 104, or the center of one of the laser spots between two adjacent laser spots coincides with the center of the square bar 104, so that the fluorescence and the laser are mixed more uniformly; in order to ensure that the optical expansion of the square rod 104 is small after light is homogenized and the laser spots are closely arranged, the images of the fluorescent spots on the light incident side of the square rod 104 and the images of the laser spots are closely arranged without gaps, and the brightness of the synthesized light generated by the geometric combination of the laser and the fluorescent light can be improved.

Example three:

referring to fig. 6, fig. 6 is a schematic structural diagram of a third embodiment of the light source system provided in the present application, and different from the embodiment shown in fig. 4, the second light source assembly in the present embodiment includes at least three second lasers, which are a second laser 102a, a second laser 102b, and a second laser 102c, respectively, where the second laser 102a, the first laser 101a, the second laser 102c, the first laser 101b, and the second laser 102b are sequentially arranged in a first direction or a second direction, that is, the first laser 101a is between the second laser 102a and the second laser 102c, and the first laser 101b is between the second laser 102c and the second laser 102 b.

The light generated by the second laser 102a, the second laser 102b, and the second laser 102c is laser light having a second wavelength distribution, a fourth wavelength distribution, and a sixth wavelength distribution, respectively; the

wavelength conversion units

103a and 103b receive laser light having the first wavelength distribution and the third wavelength distribution emitted from the first laser 101a and the first laser 101b, respectively, and convert them into fluorescence having the fifth wavelength distribution and the seventh wavelength distribution; preferably, the color of the fluorescence having the fifth wavelength distribution is the same as that of the fluorescence having the seventh wavelength distribution, and the wavelength distributions of the laser light emitted from the second laser 102a, the second laser 102b, and the second laser 102c partially overlap with the wavelength distributions of the fluorescence emitted from the

wavelength conversion units

103a and 103 b; preferably, the wavelength distributions of the laser beams emitted from the second laser 102a, the second laser 102b, and the second laser 102c are the same.

In this embodiment, two scattering sheets 106 and two focusing lenses 107 are further added, the focusing lenses 107 are disposed on the light paths of the corresponding lasers, and the scattering sheets 106 are disposed on the light paths of the corresponding lasers; the relay lens array 105 images the fluorescence and the laser light on the light incident side of the square rod 104, respectively.

Fig. 7 and 8 show the spot distribution schematic diagram of the light incident side of the square rod 104, where the laser spots and the fluorescent spots are distributed at intervals in the first direction or the second direction, La1 and La2 are images of the fluorescent spots formed by the fluorescent light passing through the relay lens array 105 on the light incident side of the square rod 104, and Lb1, Lb2 and Lb3 are images of the laser spots formed by the laser light passing through the relay lens array 105 on the light incident side of the square rod 104, respectively; the laser light spots and the fluorescent light spots on the light inlet side of the square rod 104 are arranged alternately and symmetrically, and compared with the previous embodiment, the area of the light spots is smaller, the number of the light spots is more, and the uniformity of the mixed light spots obtained after the square rod 104 is homogenized is improved; and the more light spots can also make the heat generated by the wavelength conversion units 103a-103b when converting laser into fluorescence be dispersed on a larger area, improve the heat dissipation of the fluorescent material, and be beneficial to improving the fluorescence conversion efficiency, thereby improving the luminous efficiency and the reliability.

In order to further improve the uniformity of the mixed light spots obtained after the square bar 104 is homogenized, the distribution of the laser light spots and the fluorescent light spots may also be designed in other manners, for example, as shown in fig. 9, the laser light spots Lb and the fluorescent light spots La on the light incident side of the square bar 104 are two-dimensionally distributed at intervals, that is, the fluorescent light spots La and the laser light spots Lb are both distributed at intervals in the first direction and the second direction.

Example four:

referring to fig. 10, fig. 10 is a schematic structural diagram of a fourth embodiment of the light source system provided in the present application, and different from the embodiment shown in fig. 4, in the present embodiment, the light uniformizing element 104 is a fly eye lens, and the shapes of the laser spot and the laser spot may be a polygon or a circle.

The relay lens array 105 is configured to convert the surface distribution of the fluorescent light spot and the laser light spot into an angular distribution at the light incident surface of the fly-eye lens 104; as shown in fig. 11, fig. 11 shows the angular distributions of the fluorescence light spot and the laser light spot at the light incident surface of the fly-eye lens 104 when the fluorescence light spot and the laser light spot are rectangular and circular, respectively; la1 and La2 are angle distributions corresponding to the plane distribution of the fluorescent light spots, Lb is angle distribution corresponding to the plane distribution of the laser light spots, and the fluorescent light angle distributions are symmetrically distributed on two sides of the laser angle distribution; the uniformity of the mixed light obtained after the fly-eye lens 104 homogenizes light is improved; in order to make the uniformity of the mixed light spot better, the size of the fluorescent light spot on the light incident surface of fly-eye lens 104 is preferably the same.

Since the angular distribution that can be received in the subsequent optical mechanical system is circular, the angular distribution that can be effectively utilized at the light incident surface of the fly-eye lens 104 is circular, and the angular distribution of the laser light spot and the fluorescent light spot at the light incident surface of the fly-eye lens 104 shown in fig. 11 does not completely cover the circular angular distribution region that can be effectively utilized at the light incident surface of the fly-eye lens 104, the optical expansion amounts of the laser light spot and the fluorescent light spot are diluted after the dodging by the fly-eye lens 104.

In order to fully cover the circular angle distribution area which can be effectively utilized at the light incident surface of the fly-eye lens 104, the number of the laser spots and the fluorescent spots can be increased, and the shapes and the distribution of the laser spots and the fluorescent spots are designed, so that the fluorescent spots are uniformly distributed around the laser spots. For example, as shown in fig. 12, the angular distributions of the laser light spot and the fluorescence light spot at the light incident surface of the fly-eye lens 104 can increase the total area of the light spots by increasing the number of the light spots without increasing the etendue, reduce the excitation light power density on the wavelength conversion units 103a to 103b, and improve the fluorescence conversion efficiency.

To further improve the coverage of the circular angular distribution region at the light-in surface of fly-eye lens 104, the size of the fluorescent light spots and the laser light spots on wavelength conversion units 103a-103b and scattering device 106 can be further reduced, increasing the number of light spots, thereby making the angular distribution at the light-in surface of fly-eye lens 104 as shown in fig. 13.

The shapes of the fluorescent light spots and the laser light spots can be designed to be polygons, so that the angular distribution of each light spot at the light incident surface of the fly-eye lens 104 is polygonal, and the angular distribution of the light spots at the light incident surface of the fly-eye lens 104 is tightly distributed, thereby further improving the coverage rate of a circular angular distribution area at the light incident surface of the fly-eye lens 104 and reducing the dilution of optical expansion. For example, as shown in fig. 14, fig. 14 shows the angular distribution of the spots at the entrance surface of fly eye lens 104 when the shape of the fluorescence spot and the laser spot is hexagonal; the light spot shape can be designed to be octagonal or dodecagonal, so that the light spot angle distribution at the light incident surface of the fly-eye lens 104 is octagonal or dodecagonal, and the like, so as to further improve the coverage of a circular angle distribution area at the light incident surface of the fly-eye lens 104 and reduce the dilution of the optical expansion amount.

Example five:

referring to fig. 15, fig. 15 is a schematic structural diagram of a fifth embodiment of a light source system provided in the present application, and different from the above embodiments, the present embodiment further includes a first driving device 108, where the first driving device 108 is connected to the wavelength conversion device 103 and is used for driving the wavelength conversion device 103 to rotate periodically, so that light spots formed by at least two excitation lights on the wavelength conversion device 103 act on the wavelength conversion device 103 along a predetermined path. As in the present embodiment, the first driving device 108 drives the wavelength conversion device 103 to perform a periodic circular motion, but of course, the first driving device 108 may also drive the wavelength conversion device 103 to perform a periodic linear reciprocating motion. The following description will be given taking as an example that the first driving device 108 drives the wavelength conversion device 103 to perform a periodic circular motion.

The wavelength conversion device 103 comprises a substrate 1031 and at least two wavelength conversion units 1032, the first driving device 108 is connected to the substrate 1031, and the at least two wavelength conversion units 1032 are reflective wavelength conversion units.

The scattering device includes at least one scattering unit 1061, the scattering unit 1061 is transmissive, at least two wavelength converting units 1032 and at least one scattering unit 1061 are annular, the at least two wavelength converting units 1032 and the at least one scattering unit 1061 are coaxially disposed on the substrate 1031, and the scattering unit 1061 is located between two adjacent wavelength converting units 1032, as shown in fig. 16; each wavelength conversion cell 1032 receives one excitation beam and each scattering cell 1061 receives one laser beam.

As shown in fig. 15, the first light source assembly 101 is disposed on the first side of the substrate 1031, and at least two excitation lights emitted from the first light source assembly 101 are both blue excitation lights; the second light source assembly 102 is disposed on a second side of the substrate 1031, and the first side and the second side are opposite, that is, the first light source assembly 101 and the second light source assembly 102 are respectively located on two sides of the substrate 1031; the second light source module 102 includes a green laser 1021a, a red laser 1021b, and a light combining device 1022, where the light combining device 1022 is configured to combine the green laser emitted from the green laser 1021a and the red laser emitted from the red laser 1021b to enter the scattering device along the same optical path, and in this embodiment, the light combining device 1022 is a green-transparent and red-reflective dichroic sheet, and is capable of transmitting the green laser emitted from the green laser 1021a and reflecting the red laser emitted from the red laser 1021b to combine the green laser emitted from the green laser 1021a and the red laser emitted from the red laser 1021 b. .

The light uniforming device 104 is disposed on the second side of the substrate 1031, the light uniforming device 104 and the second light source assembly 102 are commonly located on the second side of the substrate 1031, and the light uniforming device 104 and the second light source assembly 102 are disposed at an angle of 180 ° with respect to the central axis of the substrate 1031, that is, an orthogonal projection of the light uniforming device 104 on the substrate 1031, a center of the substrate 1031, and an orthogonal projection of the second light source assembly 102 on the substrate 1031 are on the same straight line.

As shown in fig. 17, at least two wavelength conversion units 1032 each include a first section 1032a, a second section 1032b, and a third section 1032c, and the first section 1032a and the third section 1032c are provided with a fluorescent substance that is excited by laser light to generate fluorescence; the first section 1032a is used for converting the received excitation light into red excited light and reflecting the red excited light for emission, the second section 1032b is used for converting the received excitation light into green excited light and reflecting the green excited light for emission, and the third section 1032c is used for diffusing the received excitation light.

With reference to fig. 15, the light source system further includes a light guiding device and a light filtering device 111.

The light guide device is used for guiding at least two excitation lights emitted by the first light source assembly 101 to the wavelength conversion device 103, and guiding at least two excitation lights emitted by the wavelength conversion device 103 and laser light scattered by the scattering device to the dodging device 104. Specifically, in the present embodiment, the light guiding device includes the first light guiding element 109 and the reflecting element 110.

The first light guiding member 109 is disposed between the first light source assembly 101 and the substrate 1031, and the first light guiding member 109 may transmit the excitation light, reflect the stimulated light, or reflect the excitation light and transmit the stimulated light. As shown in fig. 18, in the present embodiment, the first light guiding element 109 includes a reflective region 1091 and

transmissive regions

1092a and 1092b, the reflective region 1091 is used for reflecting the stimulated light emitted from the wavelength conversion device 103, the excitation light emitted from the first light source assembly 101, and the laser light emitted from the second light source assembly 102, and the transmissive regions 1092a-1092b are used for transmitting the excitation light emitted from the first light source assembly 101. The first light guiding element 109 transmits at least two excitation lights emitted from the first light source assembly 101 to the wavelength conversion device 103 through the

transmission regions

1092a and 1092b, the received laser light emitted from the wavelength conversion device 103 enters the first light guiding element 109, at least one laser light emitted from the second light source assembly 102 is scattered by the scattering device and then enters the first light guiding element 109, and the first light guiding element 109 reflects the received excitation light and the received laser light to the reflecting element 110 through the reflection region 1091.

The reflecting element 110 reflects the laser beam and the excited light emitted from the first light guiding element 109 to the filter 111, and the laser beam and the excited light are filtered by the filter 111 and then enter the light uniformizing device 104.

As shown in fig. 16 and 17, the filter device 111 is annular and includes a first filter region 111a, a second filter region 111b, and a third filter region 111c, the filter device 111 and the wavelength conversion device 1032 are coaxially and fixedly disposed, and the first filter region 111a, the second filter region 111b, and the third filter region 111c are respectively disposed opposite to the first section 1032a, the second section 1032b, and the third section 1032c at 180 ° with respect to the central axis of the substrate 1031.

In a specific embodiment, as shown in fig. 15, the light uniformizing device 104 is a square bar, the wavelength conversion device 103 may be a color wheel, in the light source system, blue-based light is provided by blue laser, red/green-based light is formed by mixing red/green fluorescence generated by exciting the wavelength conversion device 103 by the blue laser and red/green laser, red/green fluorescence spots and red/green laser spots are symmetrically distributed on the light incident side of the square bar 104 without overlapping, and after the light uniformizing by the square bar 104, geometric light combination is realized, so as to realize uniform mixing of the laser and the fluorescence.

The third section 1032c may diffusely reflect the blue excitation light to the first light guiding element 109, and is incident to the light incident side of the square bar 104 through the first three relay lens group/relay lens array 105a, the reflecting element 110 and the second three relay lens group/relay lens array 105 b.

In a specific embodiment, the first section 1032a (section R) and the second section 1032B (section G) can absorb the blue excitation light and convert the blue excitation light into red excitation light and green stimulated light, respectively, and the third section 1032B (section B) has a diffuse reflection property and can scatter the blue laser light; the scattering unit 1061 may transmit the red laser light and the green laser light and scatter them to reduce the speckle phenomenon; la1 and La2 are stimulated laser spots generated by blue excitation light on the wavelength conversion device 103, and Lb is a laser spot generated by red laser light or green laser light on the wavelength conversion device 103.

The light combining device 1022 can transmit the red laser light and reflect the green laser light; the three sets of collecting lenses/collecting lens arrays 112 are used for collecting the fluorescence emitted from the fluorescence area on the wavelength conversion device 103 and the red/green laser light emitted from the red laser 1021b and the green laser 1021a passing through the scattering unit 1061; the reflecting element 110 is configured to reflect light output by the first three relay lens group/relay lens array 105a to the second three relay lens group/relay lens array 105b, and the second three relay lens group/relay lens array 105b processes light spots emitted by the reflecting element 110, so as to image the laser light and the laser light on the light incident side of the square rod 104.

In a specific embodiment, the laser spots and the laser spots on the light incident side of the square bar 104 are as shown in fig. 19, the red/green laser light emitted from the wavelength conversion unit 1032 and the diffusely reflected blue laser light are imaged on the upper and lower ends of the square bar 104, and the red/green laser light scattered by the scattering unit 1061 is imaged in the middle area of the square bar 104.

In the red/green light segment, the first blue laser 101a and the first blue laser 101b emit blue excitation light, which passes through the first light guide element 109 and the three groups of collecting lens/collecting lens arrays 112 and then are focused on the wavelength conversion unit 1032, respectively, and the wavelength conversion unit 1032 is excited by the blue excitation light, so as to obtain a red/green stimulated laser spot; at this time, the corresponding red laser 102 b/green laser 102a is turned on, and the red/green laser is scattered by the scattering unit 1061, so as to obtain a red/green laser spot. Thereby, two red/green laser spots and one red/green laser spot corresponding to the spot on the light incident side of the square bar 104 shown in fig. 19 are formed on the wavelength conversion device 103, and the two laser spots and the one laser spot on the wavelength conversion device 103 are imaged on the light incident side of the square bar 104 through the relay lens, so that the spot arrangement shown in fig. 19(a) is formed.

In the blue light section, the red laser 1021a and the green laser 1021b are turned off, the blue excitation light emitted by the first blue laser 101a and the first blue laser 101b passes through the first light guiding element 109 and the collecting lens and is focused on the third section 1032c, the blue laser is reflected by the third section 1032c to obtain a blue laser spot, and the two blue laser spots are imaged on the light incident side of the square rod 104 through the relay lens to form the spot arrangement shown in fig. 19 (b).

In order to ensure the minimum etendue and fully utilize the laser and fluorescence capabilities, the laser spots and the fluorescence spots on the light-incident side of the square bar 104 are closely arranged without intervals, and the sum of the areas of the spots is equal to the area of the light-incident side of the square bar 104. In addition, in order to mix the laser and the fluorescent light spots uniformly after the light is homogenized by the square rod 104, the two laser receiving light spots on the light incident side of the square rod 104 can have the same area and are symmetrically distributed relative to the laser light spots.

In order to further improve the uniformity of the laser and the fluorescent light spot after the light uniformization by the square rod 104, a plurality of groups of blue lasers, a plurality of groups of red lasers and green lasers can be arranged, and corresponding annular fluorescent regions and annular scattering regions are added in the wavelength conversion unit 1032, so that the fluorescent light spot and the laser light spot on the light incident side of the square rod 104 are distributed more uniformly, and the mixing uniformity of the laser and the fluorescent light after the light uniformization by the square rod 104 is improved.

For example, taking three groups of blue lasers, one group of red lasers and one group of green lasers, the corresponding wavelength conversion unit 1032 is an example of alternate arrangement of two annular scattering regions and three annular fluorescent regions, fig. 20(a) and 20(b) are respectively a schematic diagram of arrangement of red/green laser spots and fluorescent spots on the light incident side of the square bar 104 and a schematic diagram of arrangement of blue laser spots on the light incident side of the square bar 104; in the red/green light segment, as shown in FIG. 20(a), the red/green fluorescent light spots La1-La3 and the red/green laser spots Lb1-Lb2 are alternately arranged; in the blue segment, as shown in FIG. 20(b), blue laser spots Lb1-Lb3 are symmetrically distributed.

In the red/green light segment, blue laser emitted by the three groups of blue lasers is focused on three annular fluorescent regions of the wavelength conversion unit 1032 respectively, and the fluorescent regions are excited by the blue laser to obtain three independent red/green fluorescent light spots; at this time, the corresponding red laser 1021a and green laser 1021b are turned on, and the red/green laser is scattered by the two annular scattering units 1061, so as to obtain two red/green laser spots. Thereby, three red/green fluorescent light spots and two red/green laser light spots corresponding to the light spot on the light incident side of the square bar 104 shown in fig. 20(a) are formed, and the three fluorescent light spots and the two laser light spots are imaged on the light incident side of the square bar 104, and after the light is homogenized by the square bar 104, one red/green light spot in which the laser light and the fluorescence light are uniformly mixed is obtained.

In the blue light section, the red laser 1021a and the green laser 1021b are turned off, blue laser light emitted by the three groups of blue lasers is respectively focused on the third section 1032c, the blue laser light is reflected by the third section 1032c, three blue laser spots are obtained, and the three blue laser spots are imaged on the light-in side of the square bar 104 to form spots as shown in fig. 20 (b); after the light is homogenized by the square rod 104, a blue light spot with the laser and the fluorescence uniformly mixed is obtained.

The laser fluorescence light combination mode in the embodiment corresponds to a wide color gamut standard (such as DCI and rec.2020), fluorescence loss increase caused by increase of laser ratio in an optical expansion light combination process is avoided, and meanwhile, laser spots and fluorescence spots in front of the dodging element are symmetrically arranged, so that laser fluorescence mixing uniformity can be improved, and the problem of non-uniformity of projection display is avoided.

Example six:

referring to fig. 21, fig. 21 is a schematic structural diagram of a sixth embodiment of the light source system provided in the present application, and the difference from the embodiment shown in fig. 15 is that a fly-eye lens 104 is selected to replace a square rod in the present embodiment, and accordingly, a lens group or a lens array functions to collimate the fluorescence emitted from the wavelength conversion device 103 and the transmitted laser light and then to enter the fly-eye lens 104.

In a specific embodiment, the angle distribution of the laser spot and the fluorescent spot on the light incident side of fly-eye lens 104 is schematically shown in fig. 23, where La1-La4 are fluorescent spots, and Lb is a laser spot.

In order to fully utilize the optical expansion, a plurality of groups of blue lasers may be provided, and specifically, the first light source assembly 101 further includes another two blue lasers, and the fluorescent light spots are disposed around the laser light spots; for example, as shown in fig. 22, fig. 22 shows that when four sets of blue lasers are used as the excitation light, in the red/green light segment, the positions of the fluorescent spot and the laser spot on the wavelength conversion device 103, La1 is the red/green laser spot on the scattering unit 1061 of the red/green laser emitted by the red laser 1021 a/green laser 1021b, La1 and La2 are two independent red/green fluorescent spots obtained by two independent sets of blue lasers exciting the first wavelength conversion unit 1032a, and La3 and La4 are two independent red/green fluorescent spots obtained by another two independent sets of blue lasers exciting the second wavelength conversion unit 1032 b.

In the red/green light band, four independent red/green fluorescent light spots and one red/green laser light spot are obtained on the wavelength conversion device 103, the five light spots respectively correspond to a group of collecting lenses 112, are collected by the collecting lenses 112 and collimated by the collimating lenses, are filtered by the filtering device 111, and then are incident to the fly eye lens 104. Fig. 23(b) shows the angular distribution of the five spots incident on fly-eye lens 104, and it is advantageous to use more fluorescent spots and laser spots to fully utilize the etendue that fly-eye lens 104 can accommodate, compared to the two red/green fluorescent and one red/green laser schemes shown in fig. 23 (a).

Compared with the scheme of obtaining two fluorescent light spots by using two groups of blue lasers, the scheme of obtaining the plurality of fluorescent light spots by using the plurality of groups of blue lasers has the advantages that the energy of the blue lasers can be dispersed on more light spots under the condition that the final emergent light brightness of the light source is the same, the energy density of exciting light is reduced, and therefore the light efficiency of a fluorescent area is improved.

Example seven:

referring to fig. 24, fig. 24 is a schematic structural diagram of a seventh embodiment of the light source system provided in the present application, in which the wavelength conversion device 103 includes a substrate 1031 and a wavelength conversion unit 1032, the wavelength conversion unit 1032 is a reflective wavelength conversion unit disposed on the substrate 1031, the wavelength conversion device 103 is in a ring shape, and the wavelength conversion unit 1032 receives at least two excitation lights.

The first light source assembly 101 and the second light source assembly 102 are disposed on a first side of the substrate 1031, and the first light source assembly 101 and the second light source assembly 102 are disposed at an angle of 180 ° with respect to a central axis of the substrate 1031, that is, an orthographic projection of the first light source assembly 101 on the substrate 1031, a center of the substrate 1031, and an orthographic projection of the second light source assembly 102 on the substrate 1031 are on the same straight line.

The at least two excitation lights emitted by the first light source assembly 101 are both blue excitation lights, and the wavelength conversion unit 1032 includes a first section 1032a, a second section 1032b, and a third section 1032c, as shown in fig. 25, the first section 1032a is configured to convert the received excitation light into red stimulated light, the second section 1032b is configured to convert the received excitation light into green stimulated light, and the third section 1032c is configured to diffuse the received excitation light.

The second light source module 102 includes a blue laser 1021a, a green laser 1021b, a red laser 1021c, and a light combining device 1022, where the light combining device 1022 is configured to combine the blue laser emitted from the blue laser 1021a, the green laser emitted from the green laser 1021b, and the red laser emitted from the red laser 1021c, so as to enter the scattering device 106 along the same optical path.

Specifically, the light combining device 1022 includes a first light combining element 1022a and a second light combining element 1022b, both of which are dichroic sheets, the first light combining element 1022a is capable of transmitting blue laser light and reflecting green laser light, is disposed at an intersection of the blue laser light emitted from the blue laser 1021a and the green laser light emitted from the green laser 1021b to combine the blue laser light emitted from the blue laser 1021a and the green laser light emitted from the green laser 1021b, and the second light combining element 1022b is capable of transmitting the blue laser light and the green laser light and reflecting red laser light, and is disposed at an intersection of the light emitted from the first light combining element 1022a and the red laser light emitted from the red laser 1021c to combine the blue laser light emitted from the blue laser 1021a, the green laser light emitted from the green laser 1021b, and the red laser light emitted from the red laser 1021c to enter the scattering device 106 along the same optical path.

The scattering device 106 is disposed between the substrate 1031 and the second light source assembly 102, the scattering device 106 includes a scattering unit 1061 and a second driving device 1062, and the second driving device 1062 drives the scattering unit 1061 to periodically rotate so as to scatter at least one laser beam. In this embodiment, the laser beam emitted from the second light source module 102 does not pass through the wavelength conversion device 103, but passes through the independent scattering device 113 and then is imaged together with the fluorescence on the light incident side of the square rod 104.

The light uniforming device 104 is disposed on the second side of the substrate 1031, and the light uniforming device 104 and the first light source assembly 101 are respectively located on two sides of the central axis of the substrate 1031.

Further, the light source system further comprises light guiding means and filtering means 111.

The light guide device is used for guiding at least two excitation lights emitted by the first light source assembly 101 to the wavelength conversion device 103, and guiding at least two excitation lights emitted by the wavelength conversion device 103 and laser light scattered by the scattering device to the dodging device 104. Specifically, in the present embodiment, the light guiding device includes a first light guiding element 113 and a second light guiding element 114.

The first light guiding member 113 is disposed between the first light source assembly 101 and the substrate 1031, and the first light guiding member 109 may transmit the excitation light, reflect the stimulated light, or reflect the excitation light and transmit the stimulated light. As shown in fig. 24, in the present embodiment, the first light guiding element 113 includes a reflective region (not shown) for reflecting the excited light and the unconverted excitation light emitted from the wavelength conversion device 103, and a transmissive region (not shown) for transmitting the excitation light emitted from the first light source assembly 101. The first light guiding element 113 transmits at least two excitation lights emitted from the first light source assembly 101 to the wavelength conversion device 103 through the transmission region, and the first light guiding element 113 reflects the excitation lights emitted from the wavelength conversion device 103 and the unconverted stimulated lights to the second light guiding element 114 through the reflection region.

The second light guiding element 114 is disposed between the second light source assembly 102 and the substrate 1031, and is located at a junction of the laser light emitted from the first light guiding element 113 and the laser light scattered by the scattering device 106, and is used for combining the laser light and emitting the combined light. Specifically, the second light guiding element 114 includes a transmission region for transmitting the laser light emitted after being scattered by the scattering device 106, and a reflection region surrounding the transmission region for reflecting the excited light and the unconverted excitation light emitted by the first light guiding element 113, so that the excited light and the laser light, or the unconverted excitation light and the laser light are combined and emitted. The laser beam and the laser beam emitted from the second light guiding element 114 enter the filter 111, and the laser beam enter the dodging device 104 after being filtered by the filter 111.

The filter device 111 is annular and includes a first filter region 111a, a second filter region 111b and a third filter region 111c, as shown in fig. 25, the filter device 111 and the wavelength conversion device 103 are coaxially and fixedly disposed, and the first filter region 111a, the second filter region 111b and the third filter region 111c are respectively disposed opposite to the first section 1032a, the second section 1032b and the third section 1032c at 180 ° with respect to the central axis of the substrate 1031.

In a specific embodiment, after the blue lasers emitted from the first blue laser 101a and the second blue laser 101b pass through the first light guiding element 113 and the collecting lens group 112, two independent blue laser spots La1-La2 are formed on the wavelength conversion unit 1032. In the red/green light segment, the two independent blue laser spots excite the phosphor to generate red/green fluorescence, so as to obtain two independent red/green fluorescence spots, which are collected by the collection lens group 112 and reflected by the first light guide element 113, imaged on the second light guide element 114 by the first relay lens group 105a, reflected by the second light guide element 114, and imaged on the light incident side of the square bar 104 by the second relay lens group 105 b; meanwhile, in the red/green light segment, the green laser 1021 b/red laser 1021c is turned on, the speckle phenomenon is relieved after passing through the scattering device 113, and then the image is formed on the transmission area of the second light guiding element 114 through the third relay lens group 105c, and the image is formed on the light incident side of the square rod 104 through the second relay lens group 105b after the transmission.

In a specific embodiment, as shown in fig. 26, the red/green fluorescent light spot emitted from the wavelength conversion unit 1032 and the blue laser light spot emitted from the third section 1032c are imaged on the upper and lower ends of the square bar 104, respectively, and the red/green/blue laser light spot scattered by the scattering device 113 is imaged on the middle region of the square bar 104. In this embodiment, the blue light includes the blue laser light emitted from the third section 1032c and the blue laser light transmitted by the scattering device 113, and the blue light is more matched with the red light and the green light.

Referring to fig. 27, fig. 27 is a schematic structural diagram of an embodiment of a projection display device provided in the present application, in which the projection display device 30 includes a light source system 31, and the light source system 31 is the light source system in the above embodiment.

The above embodiments are merely examples, and not intended to limit the scope of the present application, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present application, or those directly or indirectly applied to other related arts, are included in the scope of the present application.

Claims

1. A light source system, comprising:

the first light source component is used for emitting at least two beams of exciting light;

the second light source component is used for emitting at least one beam of laser;

the wavelength conversion device is arranged on the light path of the at least two beams of exciting light and is used for converting the received at least two beams of exciting light into at least two beams of receiving laser;

the dodging device is arranged on the light path of the excited light and the laser and is used for dodging the excited light and the laser;

the laser spot is positioned between two adjacent laser spots, the two adjacent laser spots are symmetrical with respect to the laser spot, or the laser spots are positioned between the two adjacent laser spots, and the two adjacent laser spots are symmetrical with respect to the laser spot.

2. The light source system according to claim 1, further comprising a scattering device disposed in an optical path of the at least one laser light for scattering the at least one laser light.

3. A light source system according to claim 2, wherein the wavelength conversion means and the scattering means are located in the same plane.

4. The light source system according to claim 2, wherein the laser light receiving spots and the laser light spots are alternately arranged on the light incident side of the light uniformizing device.

5. The light source system according to claim 4, wherein the laser light receiving spots and the laser light spots are uniformly distributed on the light incident side of the light uniformizing device.

6. The light source system of claim 2, wherein the stimulated light spot and the laser spot are closely arranged without a gap.

7. The light source system of claim 2, wherein the size of the stimulated light spot and the size of the laser spot are the same.

8. The light source system of claim 1, wherein the wavelength distributions of the at least two stimulated light beams emitted by the wavelength conversion device are the same, and the wavelength distribution of the at least one laser beam emitted by the second light source module partially overlaps with the wavelength distributions of the at least two stimulated light beams emitted by the wavelength conversion device.

9. The light source system of claim 1, wherein the wavelength conversion device comprises at least two wavelength conversion units, each wavelength conversion unit being located on an optical path of one of the excitation lights.

10. The light source system according to any one of claims 2 to 8, wherein the wavelength conversion device comprises a substrate and at least one wavelength conversion unit, the wavelength conversion unit being disposed on the substrate;

the light source system further comprises a first driving device, wherein the first driving device is connected with the substrate and used for driving the wavelength conversion unit to move periodically, so that light spots formed by the at least two excitation lights on the wavelength conversion unit act on the wavelength conversion unit along a preset path.

11. The light source system of claim 10, further comprising a light guiding device for guiding the at least two excitation lights emitted from the first light source module to the wavelength conversion device and guiding the at least two excitation lights emitted from the wavelength conversion device and the laser light scattered by the scattering device to the dodging device.

12. The light source system according to claim 11, wherein the wavelength conversion device includes at least two wavelength conversion units having a circular ring shape, the scattering device includes at least one scattering unit having a circular ring shape, the at least two wavelength conversion units and the at least one scattering unit are coaxially disposed on the substrate, and the scattering unit is located between two adjacent wavelength conversion units; each wavelength conversion unit receives one beam of the excitation light, and each scattering unit receives one beam of the laser light;

the first light source assembly is arranged on the first side of the substrate, the second light source assembly and the light homogenizing device are arranged on the second side of the substrate, the second light source assembly and the light homogenizing device are arranged at an angle of 180 degrees relative to the central axis of the substrate, and the first side and the second side are opposite to each other.

13. The light source system of claim 11, wherein the wavelength conversion device comprises a wavelength conversion unit having a circular ring shape, the wavelength conversion unit receiving the at least two excitation lights; the first light source assembly and the second light source assembly are arranged on a first side of the substrate, the first light source assembly and the second light source assembly are arranged in an angle of 180 degrees relative to the central axis of the substrate, the light homogenizing device is arranged on a second side of the substrate, and the first side and the second side are opposite;

the scattering device is arranged between the substrate and the second light source assembly and comprises a second driving device and a scattering unit, and the second driving device drives the scattering unit to periodically rotate so as to scatter at least one laser beam.

14. The light source system according to claim 10, wherein the at least two excitation lights are both blue excitation lights, and the wavelength conversion unit comprises a first section, a second section and a third section, the first section is configured to convert the received excitation lights into red excited lights, the second section is configured to convert the received excitation lights into green excited lights, and the third section is configured to diffuse the received excitation lights.

15. The light source system of claim 14, wherein the light source device further comprises a filter device, the filter device is annular and comprises a first filter region, a second filter region and a third filter region, the filter device and the wavelength conversion device are coaxially and fixedly disposed, and the first filter region, the second filter region and the third filter region are respectively disposed opposite to the first segment, the second segment and the third segment by 180 ° with respect to the central axis of the substrate; the laser beam emitted by the light guide device and the laser beam are incident to the light filtering device, and the laser beam are incident to the light uniformizing device after being filtered by the light filtering device.

16. The light source system of claim 15, wherein the second light source module comprises a green laser, a red laser, and a light combining device, and the light combining device is configured to combine the green laser light emitted from the green laser and the red laser light emitted from the red laser to be incident on the scattering device along the same optical path; or

The second light source component comprises a green laser, a red laser, a blue laser and a light combining device, wherein the light combining device is used for combining green laser emitted by the green laser, red laser emitted by the red laser and blue laser emitted by the blue laser so as to be incident to the scattering device along the same light path.

17. A projection display device comprising a light source system, wherein the light source system is the light source system according to any one of claims 1 to 16.