CN117784510A - Light source device and projection system - Google Patents

Abstract

The application discloses a light source device and a projection system, wherein the light source device comprises a light source group for emitting excitation light; a reflecting mirror corresponding to the light source group, the reflecting mirror being positioned outside the optical axis of the excited light or at the edge of the optical axis, the reflecting mirror being used for reflecting the excited light and guiding the excited light to the outer ring of the lens group; the lens group is used for converging the excitation light on the wavelength conversion device and collecting the laser light or the reflected light from the wavelength conversion device, the lens group is used for collimating the laser light or the reflected light and then making the collimated laser light or the reflected light enter a plane where the reflecting mirror is located, light spots formed by the laser light or the reflected light are not overlapped with light spots formed by the excitation light, and the non-overlapping comprises partial overlapping and complete non-overlapping; and wavelength conversion means for converting excitation light into lasing or reflected excitation light. The application removes the dependence on the dichroic mirror, reduces the times of light passing through the optical element, reduces the energy loss, and still achieves the reflectivity of more than 99% under larger incident angle deviation.

Description

Light source device and projection system

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a light source device and a projection system.

Background

In the existing laser projection display products, most of laser light source systems adopt a laser excitation fluorescent body luminescence mode to realize illumination of a projection system, and the specific implementation modes are as follows: the light source system mainly obtains time sequence light output through the fluorescent wheel and the light path structure thereof, and obtains white light for the projection device.

For some light source devices, the dichroic mirror and the reflecting mirror are usually used to meet the requirement of combining the excitation light and the laser light, so that the structure is not compact, the design and the assembly adjustment are complex, the optical elements are more, and the energy loss is increased.

The existing light source device realizes the functions of transmitting excitation light and reflecting laser light by adopting a dichroic mirror, but has the functions at the same time and needs to be realized by coating films. Therefore, the light source has higher coating dependency on the dichroic mirror, and if the coating uniformity is not good, the light source efficiency and the color uniformity can be affected.

Therefore, there is a need for a light source device and a projection system to solve the above problems.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the present application is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used to determine the scope of the claimed subject matter.

In view of the shortcomings of the prior art, the present application proposes a light source device comprising a light source group, a mirror, a lens group and a wavelength conversion device, wherein,

the light source group is used for emitting excitation light;

the reflector is corresponding to the light source group, is positioned outside the stimulated luminescence optical axis or at the edge of the optical axis, and is used for reflecting the stimulated luminescence and guiding the stimulated luminescence to the outer ring of the lens group;

the lens group is used for converging the excitation light on the wavelength conversion device, collecting the laser light or the reflected light from the wavelength conversion device, collimating the laser light or the reflected light and then making the collimated laser light or the reflected light enter a plane where the reflecting mirror is positioned, wherein light spots formed by the laser light or the reflected light are not overlapped with light spots formed by the excitation light, and the non-overlapping comprises partial overlapping and complete non-overlapping;

the wavelength conversion device is used for converting the excitation light into the excited light or reflecting the excitation light.

Another aspect of the present application provides a light source device including a light source group, a reflecting mirror, a lens group, and a wavelength conversion device, wherein,

the light source group is used for emitting excitation light, and the excitation light is incident on the outer ring position of the diameter of the lens group;

the reflecting mirror is positioned at the center of the stimulated luminescence optical axis and is used for reflecting the laser received or reflected light from the lens group to the light outlet;

the lens group is used for converging the excitation light on the wavelength conversion device, collecting the laser light or the reflected light from the wavelength conversion device, collimating the laser light or the reflected light and then making the collimated laser light or the reflected light enter the reflecting mirror, wherein light spots formed by the laser light or the reflected light are not overlapped with light spots formed by the excitation light, and the non-overlapping comprises partial overlapping and complete non-overlapping;

the wavelength conversion device is used for converting the excitation light into the excited light or reflecting the excitation light.

Optionally, the wavelength conversion device includes a substrate and a wavelength conversion material, wherein the substrate carries the wavelength conversion material and dissipates heat.

Optionally, the wavelength conversion device further includes a diffuse reflection material, and the diffuse reflection material and the wavelength conversion material form a ring shape and are disposed on the substrate.

Optionally, the wavelength conversion device further includes a blue light wavelength conversion material, where the blue light wavelength conversion material is located in a blue light section of the wavelength conversion device, and the blue light section includes a material made of a single blue light wavelength conversion material or a mixture of the blue light wavelength conversion material and a diffuse reflection material.

Optionally, the diffuse reflective material comprises one or more of the following materials: alumina, barium sulfate, titanium dioxide, and boron nitride materials.

Optionally, the diffuse reflective material is a quasi-circular or circular particle.

Optionally, the reflecting mirrors include reflecting mirrors or annular reflecting mirrors corresponding to the number of the light source groups, wherein the annular reflecting mirrors include reflecting mirrors with hollowed-out middle or light transmitting middle.

Optionally, the light source group includes a plurality of modules, and a light spot formed by each module or each several modules on a plane where the reflecting mirror is located outside the optical axis, and a light spot formed by the laser on the plane where the reflecting mirror is located at the center of the optical axis.

In yet another aspect, the present application provides a projection system including the aforementioned light source device.

According to the light source device, the reflecting mirror is used for replacing the light splitting sheet, dependence on the dichroic mirror is removed, light spots formed by laser are not overlapped with light spots formed by excitation light, the number of times that light passes through the optical element is reduced, energy loss is reduced, and the reflectivity can still reach more than 99% under larger incident angle deviation. The light source device of the application cancels a round of light path of blue light, has lower cost, simpler structure, simpler and easier design and assembly adjustment, and higher light source efficiency.

The projection system of the present application has the same advantages as comprising the aforementioned light source device.

Drawings

The following drawings of the present application are included to provide an understanding of the present application as part of the present application. The drawings illustrate embodiments of the present application and their description to explain the principles and devices of the present application. In the drawings of which there are shown,

fig. 1 is a schematic view of a conventional light source device;

fig. 2 is a schematic structural view of a light source device according to an embodiment of the present application;

fig. 3 is a schematic structural view of a light source device according to another embodiment of the present application;

FIG. 4 is a schematic diagram of various regions of a wavelength conversion device according to one embodiment of the present application;

FIG. 5 is a schematic diagram of various regions of a wavelength conversion device according to another embodiment of the present application;

FIG. 6 is a reflectance plot according to one embodiment of the present application;

fig. 7 is a graph comparing the reflectivity with the transmissivity of a conventional light source device according to an embodiment of the present application.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced without one or more of these details. In other instances, some features well known in the art have not been described in order to avoid obscuring the present application.

It should be understood that the present application may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. In the drawings, the size of layers and regions, as well as the relative sizes, may be exaggerated for clarity. Like numbers refer to like elements throughout.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

Spatially relative terms, such as "under", "below", "beneath", "under", "above", "over" and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures.

For a thorough understanding of the present application, detailed steps will be presented in the following description in order to explain the structures presented herein. It will be apparent that the practice of the present application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present application are described in detail below, however, the present application may have other implementations in addition to these detailed descriptions.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

In fig. 1, a conventional light source device is shown, the excitation light source 1 is generally blue laser, light 11 emitted by the excitation light source passes through the beam shrinking component 2 and then enters the beam splitting sheet 3, the beam splitting sheet 3 is placed at 45 degrees with a light path, and the excitation light is reflected and transmitted, so that the excitation light entering the beam splitting sheet 3 is reflected to the converging lens group 4, the converging lens group 4 is generally formed by combining two lenses, the converged excitation light enters the wavelength conversion device 5, and a wavelength conversion region and an excitation light transmission region are arranged on the wavelength conversion device 5. During the rotation of the wavelength conversion device, part of the excitation light passes through the wavelength conversion region to generate excitation light 13, the excitation light 13 reversely passes through the converging lens group 4, is collimated into a nearly parallel light beam, passes through the light splitting sheet 3, and finally is converged into the aperture of the optical-mechanical system 7 through the converging lens group 6. Part of the excitation light passes through a transmission region on the wavelength conversion device to form transmitted excitation light 12, and the excitation light 12 enters the light splitting sheet 3 to be reflected and then enters the optical-mechanical system 7 after passing through the lenses 9 and 10 and the reflectors 8A, 8B and 8C to be combined with the excitation light 13. The light source device can meet the requirement of combining excitation light and laser light by utilizing the light-splitting sheet 3 and the reflecting mirror, so that the structure is not compact, and the design and the assembly adjustment are relatively complex. The dichroic mirror is adopted in the dichroic sheet, and the dichroic mirror needs to have the functions of transmitting excitation light and reflecting laser light, and the functions are generally realized through a coating film, so that the technology has higher coating film dependency on the dichroic mirror, and if the coating film consistency is poor, the light source efficiency and the color consistency can be influenced. Meanwhile, the transmittance and the reflectance of more than 99 pairs are hardly realized by the dichroic mirror incident at 45 degrees, which is also a factor influencing the efficiency of the laser light source. Although the excitation light and the laser are collimated, due to the consistency problem of the excitation light source material, the collimation system material and the like, the excitation light and the laser light are not really collimated light, but are collimated light with a certain angle, the angle is generally 0 degrees+/-5 degrees, so the incident angle of the laser light to the dichroic mirror is 45 degrees+/-5 degrees, the coating difficulty of the dichroic mirror is increased due to the tolerance, the same high transmittance of all light can not be realized, and the efficiency is lost.

In view of the above, it is desirable to remove the reliance of the light source on the dichroic mirror while reducing the number of times the light passes through the optical element to reduce energy losses. Due to the development of lasers in recent years, the power of excitation light is higher and higher, and the radius of a light beam is smaller and smaller, so that a very small light spot can be obtained, and the direct use of a reflecting mirror becomes possible. The application provides a light source device, which comprises a light source group, a reflector, a lens group and a wavelength conversion device, wherein the light source group is used for emitting excitation light; the reflector is corresponding to the light source group, is positioned outside the stimulated luminescence optical axis or at the edge of the optical axis, and is used for reflecting the stimulated luminescence and guiding the stimulated luminescence to the outer ring of the lens group, or does not enter from the central area of the lens when the reflector guides the stimulated luminescence to enter the lens; the lens group is used for converging the excitation light on the wavelength conversion device, collecting the laser light or the reflected light from the wavelength conversion device, collimating the laser light or the reflected light and then making the collimated laser light or the reflected light enter a plane where the reflecting mirror is positioned, wherein light spots formed by the laser light or the reflected light are not overlapped with light spots formed by the excitation light, and the non-overlapping comprises partial overlapping and complete non-overlapping; the wavelength conversion device is used for converting the excitation light into the excited light or reflecting the excitation light.

Another aspect of the present application provides a light source device, including a light source group, a reflector, a lens group, and a wavelength conversion device, where the light source group is configured to emit excitation light, where the excitation light is incident on an outer ring position of a diameter of the lens group, or where the excitation light is not incident from a central region of the lens; the reflecting mirror is positioned at the center of the stimulated luminescence optical axis and is used for reflecting the laser received or reflected light from the lens group to the light outlet; the lens group is used for converging the excitation light on the wavelength conversion device, collecting the laser light or the reflected light from the wavelength conversion device, collimating the laser light or the reflected light and then making the collimated laser light or the reflected light enter the reflecting mirror, wherein light spots formed by the laser light or the reflected light are not overlapped with light spots formed by the excitation light, and the non-overlapping comprises partial overlapping and complete non-overlapping; the wavelength conversion device is used for converting the excitation light into the excited light or reflecting the excitation light.

The light source device removes dependence on the dichroic mirror by replacing the light splitting sheet with the reflecting mirror, and the light spots formed by laser are not overlapped with or even not overlapped with the light spots formed by the excitation light, so that the energy loss during passing can be reduced because the excitation light or the excitation light does not pass through the dichroic mirror, and the reflectivity can still reach more than 99% under larger incident angle deviation, such as 45+/-10 degrees. The structure of the light source device is simpler and more compact, and the design, assembly and adjustment are simpler and easier.

The light source device of the present application will be further described with reference to the accompanying drawings.

As shown in fig. 2, in one embodiment, the light source device includes a light source group 21, a reflecting mirror 23, a lens group 24, and a wavelength conversion device 25.

Alternatively, the light source group 21 includes at least two light sources for emitting the excitation light 211, and the excitation light 211 may be a laser beam. The excitation light 211 emitted by the light source may be blue light, red light, violet light, ultraviolet light, or the like, but is not limited thereto.

In one embodiment, the reflecting mirrors 23 correspond to the light source groups 21, for example, when there are two light sources, the reflecting mirrors are also two and correspond to the light sources one by one. A beam shrinking assembly 22 can be arranged between the light source group 21 and the reflecting mirror 23. The mirror of the mirrors 23 is located outside or at the edge of the optical axis of the excitation light, and the mirrors are used to reflect the excitation light and guide the excitation light to the outer periphery of the lens group 24. The reflecting mirror 23 is inclined so that an angle between an optical axis of a light beam incident on the reflecting mirror (also referred to as a central axis of the optical system (i.e., optical axis)) and an incident surface is 45 °, for example, the reflecting mirror is inclined at 45 ° with respect to a horizontal plane while leaving a space between the reflecting mirrors so that a spot formed by stimulated luminescence or a spot formed by reflected light and stimulated luminescence after changing the wavelength by the wavelength conversion device 25 does not overlap, even does not overlap, or overlaps slightly, i.e., an overlapping area is smaller than a non-overlapping area.

In one embodiment, the light source group 21 includes a plurality of modules, and each or each of the modules forms a spot on a plane of the reflector that is located outside the optical axis, and a spot of the laser light formed on the plane of the reflector that is located in the center of the optical axis. The number of the light sources is usually even, and the reflectors are in one-to-one correspondence with the light sources, so that the number of the reflectors is also even, and the reflectors are symmetrically distributed on the periphery of the laser.

In one embodiment, the lens group 24 collects the excitation light on the wavelength conversion device 25 and collects the laser light or the reflected light from the wavelength conversion device, and collimates the laser light or the reflected light to be incident on the plane of the reflecting mirror 23, where the light spot formed by the laser light or the reflected light does not coincide with the light spot formed by the excitation light.

In one embodiment, the wavelength conversion device 25 converts excitation light into lasing or reflected excitation light. The laser light or the reflected excitation light is collimated by the lens group 24 and finally converged into the aperture of the optical-mechanical system 27 by the converging lens group 26.

As shown in fig. 3, the light source device includes a light source group 31, a reflecting mirror 33, a lens group 34, and a wavelength conversion device 35.

Alternatively, the light source group 31 includes at least two light sources for emitting the excitation light 311, and the excitation light 311 may be a laser beam, and the excitation light is incident on the outer ring position of the diameter of the lens group 34. The excitation light 311 emitted by the light source may be blue light, red light, violet light, ultraviolet light, or the like, but is not limited thereto.

In one embodiment, the reflecting mirror 33 is located at the center of the optical axis of the stimulated emission light, and is also located between the light source groups 31 and does not overlap with the stimulated emission light emitted by the light sources, and the reflecting mirror 33 is used for reflecting the laser light or the reflected light from the lens group 34 to the light outlet. A beam shrinking assembly 32 can be arranged between the light source group 31 and the reflecting mirror 33. The mirror 33 is disposed obliquely so that the angle between the optical axis of the light beam incident on the mirror (also referred to as the central axis of the optical system (i.e., the optical axis)) and the incident surface is 45 °.

In one embodiment, the lens group 34 is configured to collect the excitation light on the wavelength conversion device 35 and collect the lasing or reflected light from the wavelength conversion device, and collimate the lasing or reflected light to be incident on the reflecting mirror 33, where a light spot formed by the lasing or reflected light does not overlap, even does not overlap, or overlaps a small amount, i.e. the overlapping area is smaller than the non-overlapping area.

In one embodiment, the wavelength conversion device 35 converts the excitation light into the lasing light or reflects the excitation light. The laser light or the reflected excitation light is collimated by the lens group 34, reflected by the reflecting mirror 33, and converged by the converging lens group 36 into the aperture of the optical-mechanical system 37.

In one embodiment, the light source group 21 includes a plurality of modules, and each or each of the modules forms a spot on a plane of the reflector that is located outside the optical axis, and a spot of the laser light formed on the plane of the reflector that is located in the center of the optical axis. Alternatively, the number of light sources is usually an even number, and the mirrors may be one, the mirrors being arranged symmetrically with respect to the center of the laser light.

The wavelength conversion means 25, 35 is a rotatable wavelength conversion means which is periodically rotated about its rotational axis, optionally the wavelength conversion means 25, 35 comprises one of a wheeled wavelength conversion means and a barrel wavelength conversion means. For example, the wavelength conversion devices 25, 35 are wheel-type or barrel-type fluorescence devices.

In one embodiment, the wavelength conversion device 25, 35 comprises a substrate and a wavelength conversion material, wherein the substrate carries the wavelength conversion material and dissipates heat. For example, the substrate may be a circular substrate, the wavelength conversion material may be arranged in the circumferential direction of the substrate, a fanned ring shape, a semi-annular shape, or the like may be formed on the substrate, and the wavelength conversion materials for different conversion wavelengths may be arranged in the circumferential direction in the vicinity of the outer periphery of the substrate. The region where the wavelength conversion material is formed is a wavelength conversion region.

The substrate is a metal base material made of copper, aluminum, or the like, and the surface of the base body on the excitation light irradiation device side is subjected to mirror finishing by silver vapor deposition or the like so that the laser light is reflected out of the wavelength conversion device 25. The wavelength conversion material is formed on the surface of a mirror-finished substrate. Because the base plate is made of high heat conduction material, heat exchange can be carried out with air rapidly when the base plate rotates at high speed, and therefore the heat dissipation effect is achieved.

Optionally, as shown in fig. 4, the wavelength converting region surface is provided with wavelength converting materials including, but not limited to, a green light converting material 41, a red light converting material 42, and a yellow light converting material 43, which is further provided with a reflective region, i.e. the wavelength converting device 25 further comprises a diffuse reflecting material 44, which forms a ring shape with the wavelength converting material. The diffusely reflective material converts excitation at a specific angle to lambertian light having characteristics similar to stimulated luminescence that does not have a specific angle. Optionally, the diffuse reflective material 44 includes one or more of the following: alumina, barium sulfate, titanium dioxide, and boron nitride materials. Optionally, the diffuse reflective material 44 is a quasi-circular or circular particle.

Alternatively, as shown in fig. 5, the wavelength conversion region surface is provided with a wavelength conversion material including, but not limited to, a green light conversion material 51, a red light conversion material 52, and a yellow light conversion material 53, and the wavelength conversion device further includes a blue light wavelength conversion material 54 located in a blue light section of the wavelength conversion device, the blue light section including a material made of a single blue light wavelength conversion material 54 or a mixture of a blue light wavelength conversion material and a diffuse reflection material.

In one example, the light source device is used in a projection system, the two excitation lights incident to the wavelength conversion device form two light spots on the wavelength conversion device, the aperture of the projection system is rectangular, the long side direction of the aperture is parallel to the central line direction of the two light spots, that is, the central line direction is the radial direction of the wavelength conversion device corresponding to the position where the excitation lights are incident, and by the arrangement, the excitation lights and the excited lights of the two light spots can be received by the projection system to the greatest extent, so that the efficiency of the light source is improved.

In one embodiment, the projection system uses the above light source device, the light source group 21 is generally blue laser, the light 211 emitted by the light source group 21 passes through the beam shrinking component 22, where the light source group 21 may be two lasers or multiple lasers arranged in a ring, the light 211 is incident on the reflecting mirror 23, the reflecting mirror 23 is placed at 45 ° with respect to the optical path, where the reflecting mirror may be 2 reflecting mirrors, or multiple reflecting mirrors arranged in a ring, or a ring reflecting mirror with a hollow or transparent middle, which reflects the excitation light onto the lens group 24, the lens group 24 is generally formed by combining two lenses, the converged excitation light is incident on the wavelength conversion device 25, and the wavelength conversion device 25 is provided with a wavelength conversion region and/or a reflection region. During the rotational movement of the wavelength conversion device, part of the excitation light is subjected to laser light through the wavelength conversion region, the laser light reversely passes through the lens group 24, is collimated into a nearly parallel beam, is transmitted from the light transmission region surrounded by the reflecting mirror to the light outlet, and finally is converged into the aperture of the optical-mechanical system 27 through the converging lens group 26.

In one embodiment, the projection system adopts the above light source device, the light source group 31 is generally blue laser, the emitted light 311 passes through the beam shrinking component 32, where the light source group 31 may be two lasers or multiple lasers arranged in a ring shape, the light 311 is incident on the lens group 34 through the outer side of the reflecting mirror 33, the reflecting mirror 33 is placed at 45 ° with respect to the light path, where the reflecting mirror is an annular reflecting mirror with hollowed-out edge or light-transmitting edge, the lens group 34 is generally formed by combining two lenses, the converged excitation light is incident on the wavelength conversion device 35, and the wavelength conversion device 35 is provided with a wavelength conversion region and/or a reflection region. During the rotation of the wavelength conversion device, part of the excitation light passes through the wavelength conversion region to generate lasing light, the lasing light reversely passes through the lens group 34, is collimated into a nearly parallel beam, and is incident on the reflecting mirror 33, reflected by the reflecting mirror 33 to the light outlet, and finally is converged into the aperture of the optical-mechanical system 37 through the converging lens group 36.

As shown in fig. 6, the solid line is the reflectance according to one embodiment of the present application, and it can be seen that the reflectance can reach 99% or more in the range of 420nm to 680 nm.

As shown in fig. 7, the reflectance corresponding to the left side of fig. 7 is the reflectance according to an embodiment of the present application, the transmittance corresponding to the right side of fig. 7 is the transmittance of the conventional light source device, and the dotted line is the transmittance of the conventional light source device, it can be seen that the reflectance of the embodiment of the present application corresponding to the solid line is higher than the conventional light source device corresponding to the dotted line in this spectral range, and particularly the transmittance of the conventional light source is less than 90% in the range of less than 480nm and more than 660nm, so the light source device of the present application has higher light source efficiency.

Based on the above description, the light source device and the projection system provided by the application have at least the following advantages:

1. the dependence of the light source on the dichroic mirror is removed.

2. The number of times light passes through the optical element is reduced, reducing the loss of energy.

3. The reflectivity of the incident angle of 45 DEG + -10 DEG can easily reach more than 99%, and the energy loss during passing can be reduced without passing the exciting light or the excited light through the dichroic mirror.

4. The light source structure is simpler, and light source efficiency is higher.

5. Compared with the approach technical scheme, the blue light winding optical path is omitted, the cost is lower, and the structure is simpler.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the present application. Terms such as "disposed" or the like as used herein may refer to either one element being directly attached to another element or one element being attached to another element through an intermediate member. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise specified in the other embodiment.

The present application has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the present application to the scope of the described embodiments. Further, it will be understood by those skilled in the art that the present application is not limited to the above-described embodiments, and that many variations and modifications are possible in light of the teachings of the present application, which variations and modifications are within the scope of what is claimed herein. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims (10)

1. A light source device is characterized in that the light source device comprises a light source group, a reflector, a lens group and a wavelength conversion device, wherein,

the light source group is used for emitting excitation light;

the reflector is corresponding to the light source group, is positioned outside the stimulated luminescence optical axis or at the edge of the optical axis, and is used for reflecting the stimulated luminescence and guiding the stimulated luminescence to the outer ring of the lens group;

the lens group is used for converging the excitation light on the wavelength conversion device, collecting the laser light or the reflected light from the wavelength conversion device, collimating the laser light or the reflected light and then making the collimated laser light or the reflected light enter a plane where the reflecting mirror is positioned, wherein light spots formed by the laser light or the reflected light are not overlapped with light spots formed by the excitation light, and the non-overlapping comprises partial overlapping and complete non-overlapping;

the wavelength conversion device is used for converting the excitation light into the excited light or reflecting the excitation light.

2. A light source device is characterized in that the light source device comprises a light source group, a reflector, a lens group and a wavelength conversion device, wherein,

the light source group is used for emitting excitation light, and the excitation light is incident on the outer ring position of the diameter of the lens group;

the reflecting mirror is positioned at the center of the stimulated luminescence optical axis and is used for reflecting the laser received or reflected light from the lens group to the light outlet;

the lens group is used for converging the excitation light on the wavelength conversion device, collecting the laser light or the reflected light from the wavelength conversion device, collimating the laser light or the reflected light and then making the collimated laser light or the reflected light enter the reflecting mirror, wherein light spots formed by the laser light or the reflected light are not overlapped with light spots formed by the excitation light, and the non-overlapping comprises partial overlapping and complete non-overlapping;

the wavelength conversion device is used for converting the excitation light into the excited light or reflecting the excitation light.

3. A light source device according to claim 1 or 2, wherein the wavelength conversion device comprises a substrate and a wavelength conversion material, wherein the substrate carries the wavelength conversion material and dissipates heat.

4. A light source device as recited in claim 3, wherein the wavelength conversion device further comprises a diffuse reflective material, the diffuse reflective material and the wavelength conversion material being arranged in a torus-shape on the substrate.

5. A light source device as recited in claim 3, wherein the wavelength conversion device further comprises a blue light wavelength conversion material, the blue light wavelength conversion material being located in a blue light segment of the wavelength conversion device, the blue light segment comprising a material of the blue light wavelength conversion material alone or a mixture of the blue light wavelength conversion material and the diffuse reflective material.

6. A light source device as claimed in claim 4 or 5, wherein the diffusely reflective material comprises one or more of the following materials: alumina, barium sulfate, titanium dioxide, and boron nitride materials.

7. A light source device as recited in claim 6, wherein the diffuse reflective material is a quasi-circular or circular particle.

8. A light source device according to claim 1, wherein the reflecting mirrors comprise reflecting mirrors or annular reflecting mirrors corresponding to the number of the light source groups, wherein the annular reflecting mirrors comprise reflecting mirrors with hollowed-out middle or light transmitting middle.

9. A light source device according to claim 1 or 2, wherein the light source group comprises a plurality of modules, each or each of the plurality of modules forming a spot on a plane of the reflector being located outside the optical axis, and a spot formed by the laser on the plane of the reflector being located in the center of the optical axis.

10. A projection system, characterized in that it comprises a light source device as claimed in any one of claims 1 to 9.