CN107479311B

CN107479311B - Light source system and projection equipment

Info

Publication number: CN107479311B
Application number: CN201710656475.XA
Authority: CN
Inventors: 胡飞; 侯海雄
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Technology Co Ltd
Priority date: 2014-06-23
Filing date: 2014-06-23
Publication date: 2020-10-20
Anticipated expiration: 2034-06-23
Also published as: CN105204279B; CN105204279A; CN107515511A; CN107515511B; CN107479311A

Abstract

The invention provides a light source system and a projection device, wherein the light source system comprises at least two light sources, a wavelength conversion device, a first light guide component and a second light guide component, the at least two light sources comprise an exciting light source and a first supplementary light source, and the exciting light source is used for emitting exciting light; the first light guide component is used for guiding the exciting light to the wavelength conversion device and guiding the excited light emitted by the wavelength conversion device to the dodging device; the wavelength conversion device is used for converting the exciting light into stimulated light and emitting the stimulated light to the first light guide component; the first supplementary light source emits first supplementary light, and the optical expansion amount of the first supplementary light is smaller than the stimulated light; the second light guiding member is used for guiding the first supplementary light to the light uniformizing device, wherein the size of the second light guiding member is smaller than that of the first light guiding member. The invention can greatly improve the light utilization rate of the first supplement light.

Description

Light source system and projection equipment

The application is a divisional application based on patent applications with application number 201410284185.3, name of the invention being light source system and projection equipment, and application date 2014-06-23.

Technical Field

The present invention relates to the field of optical technology, and more particularly, to a light source system and a projection apparatus.

Background

At present, solid-state light sources have been widely used in general illumination, special illumination, and projection display due to their characteristics of long life, environmental protection, and the like. Among them, white light solid-state light sources have great development potential in the field of illumination.

The prior art provides a white light source for realizing ultrahigh brightness by using laser to excite fluorescent powder, and the white light source adopts a blue-violet laser with the wavelength of 440nm-455nm to excite YAG: the yellow fluorescent powder of the Ce material generates high-efficiency yellow fluorescent light, blue laser with the wavelength of 440-470 nm is adopted to form blue laser complementary with the yellow fluorescent light, and the yellow fluorescent light and the blue laser are combined to form a white light source.

Such a white light source can be used in the field of projection displays requiring a high-brightness light source. Such as a 3DLP, 3LCD, or 3LCOS projector, etc. The white light emitted from such a white light source is spectrally divided into three primary colors, red, green and blue, which are incident on one or more light modulation devices, such as a DMD, an LCD chip, or an LCOS chip. The red, green and blue primary color lights modulated by the light modulation device are combined together on the spectrum and output to a screen through a projection lens to form a color image. The efficiency of the blue-violet laser is high, and the thermal stability and the long-term reliability are good. YAG: the phosphor of the Ce material has high emission quantum efficiency and good thermal stability, so that blue-violet laser and YAG: the incorporation of Ce phosphor results in a high efficiency, high reliability, and high brightness white light source.

However, when YAG is excited with a blue-violet laser: in a white light source in which a phosphor of Ce material forms white light, since yag: the spectral intensity of yellow light emitted by the excited phosphor of the Ce material is weakened in a red section, so that the white light source has the white balance problem that the white light balance point deviates from the Planckian black body curve and presents greenish white.

In order to avoid the white balance problem, the prior art provides a method for filtering the excessive green light component in the synthesized white light, so that the white balance point is restored to the planckian black body curve, thereby solving the white balance problem. However, this method reduces the light extraction efficiency of the white light source by filtering the green light component.

The prior art provides another method for adding red laser in yellow fluorescence to solve the white balance problem of a white light source, such as supplementing laser with a spectrum range of 638nm or 650nm in yellow fluorescence to increase the red component in the combined light, thereby solving the white balance problem.

As shown in fig. 1, a structure of a light source system for adding red laser to yellow fluorescence is provided for the prior art. The light source system includes a blue excitation light source 11, a red complementary light source 12, a spectral filter 13 having a center region and an edge region, a color wheel 14, a condenser lens 15, and a light uniformizing device 16. Wherein the center area of the spectral filter 13 transmits blue light and red light and reflects green light, and the edge area reflects red light, green light, and blue light. In this way, the blue excitation light emitted by the blue laser light source 11 and the red light emitted by the red complementary light source 12 are transmitted to the color wheel 14 through the central area of the spectral filter 13, the yellow phosphor on the color wheel 14 absorbs the blue excitation light and scatters the red light, the yellow phosphor and the scattered red light are emitted, the yellow phosphor and the scattered red light are incident to the spectral filter 13 through the condenser lens 15, the green light in the yellow phosphor incident to the central area of the spectral filter 13 is reflected to the light uniformizing device 16, the yellow phosphor and the red light incident to the edge area of the spectral filter 13 are also reflected to the light uniformizing device 16, and the red light in the yellow phosphor incident to the central area of the spectral filter 13 and the scattered red light are transmitted and lost.

In the above conventional white light source, the red light emitted from the red supplemental light source is scattered by the fluorescent material and lost, which is approximately 5% to 10%. The loss caused by collection by the condenser lens after the lambertian light distribution is formed is approximately 10%, and then a part of light is lost by transmission of the central area of the light splitting filter, which is approximately 10%, so that the loss of red light emitted by the red supplement light source is large, and the light utilization rate of the red light is low, which is approximately about 60-70%.

Disclosure of Invention

In view of this, the present invention provides a light source system and a projection apparatus, so as to solve the problem of low utilization efficiency of red light emitted by a red supplement light source in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a light source system comprising at least two light sources, a wavelength conversion device, a first light guiding member and a second light guiding member, the at least two light sources comprising an excitation light source and a first supplemental light source, wherein:

the excitation light source is used for emitting excitation light;

the first light guide component is used for guiding the exciting light to the wavelength conversion device and guiding the excited light emitted by the wavelength conversion device to the dodging device;

the wavelength conversion device is used for converting the exciting light into stimulated light and emitting the stimulated light to the first light guide component;

the first supplementary light source emits first supplementary light, and the optical expansion of the first supplementary light is smaller than that of the stimulated light;

the second light guide part is used for guiding the first supplement light to the light evening device, and the size of the second light guide part is smaller than that of the first light guide part.

The invention also provides projection equipment which comprises the light source system.

Compared with the prior art, the technical scheme provided by the invention has the following advantages:

according to the invention, the first supplement light is supplemented in the received laser light, so that the proportion of the first supplement light in the combined light can be improved, and meanwhile, the first supplement light is directly guided to the light uniformizing device by the first light guide component without being scattered by the wavelength conversion device, so that the light loss of the first supplement light caused by the scattering of the wavelength conversion device is avoided, and the light utilization rate of the first supplement light is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a block diagram of a light source system provided in the prior art;

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

FIG. 3 is a schematic diagram illustrating a filtering curve of a filter according to an embodiment of the present invention;

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

fig. 5 is a schematic structural diagram of a light source system according to a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of a light source system according to a fourth embodiment of the present invention;

fig. 7 is a schematic structural diagram of a light source system according to a fifth embodiment of the present invention;

fig. 8 is a schematic structural diagram of a light source system according to an embodiment of the present invention;

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

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

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

Detailed Description

The present invention provides a light source system comprising at least two light sources, a wavelength conversion device, a first light guiding member and a second light guiding member, wherein the at least two light sources comprise an excitation light source and a first supplemental light source, wherein:

the exciting light source is used for emitting exciting light;

the first light guide component is used for guiding the exciting light emitted by the exciting light source to the wavelength conversion device and guiding the received laser emitted by the wavelength conversion device to the dodging device;

the first supplementary light source emits first supplementary light, and the optical expansion amount of the first supplementary light is less than the stimulated light;

the second light guiding member is used for guiding the first supplemental light to the light unifying device, and the size of the second light guiding member is smaller than that of the first light guiding member.

Preferably, the second light guide member may have a size set in accordance with one or a combination of a plurality of kinds of light loss amounts when the excitation light passes through the second light guide member, a light loss amount when the first complementary light passes through the second light guide member, a light loss amount when the second complementary light passes through the second light guide member, and a light loss amount when the excitation light passes through the second light guide member. Preferably, the area of the second light directing component is less than 50% of the useful spot area. The useful spot area refers to the area of a spot formed on the first light guide member by the received laser light emitted by the wavelength conversion device.

The invention also provides a projection device comprising the light source system.

The light source system provided by the invention comprises at least two light sources, wherein the at least two light sources comprise an excitation light source and a first supplement light source, the excitation light emitted by the excitation light source is guided to a wavelength conversion device through a first light guide part, is converted into a received laser through the wavelength conversion device, the received laser is guided to a light uniformizing device through the first light guide part, the first supplement light emitted by the first supplement light source with the expansion amount smaller than that of the received laser is directly guided to the light uniformizing device through a second light guide part, so that the combined light of the received laser and the first supplement light is obtained, the first supplement light is supplemented in the received laser, the proportion of the first supplement light in the combined light can be improved, and meanwhile, the first supplement light is directly guided to the light uniformizing device by the first light guide part without being scattered by the wavelength conversion device, so that the light loss of the first supplement light caused by the scattering of the wavelength conversion device is avoided, the light utilization rate of the first supplement light is greatly improved.

The foregoing is a core idea of the present invention, and in order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention and the scope of the present invention is therefore not limited to the specific embodiments disclosed below.

Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

This is described in detail below by means of several embodiments.

Example one

The present embodiment provides a light source system, as shown in fig. 2, which includes two light sources, an excitation light source 21 and a first supplemental light source 22, and further includes a first light guide member 23, a wavelength conversion device 24, a second light guide member 25, and a light uniformizing device 26. In the present embodiment, the first light guide member 23 and the second light guide member 25 realize light splitting and light combining by wavelength. The first light guide member 23 includes an optical filter 231 having a center film and an edge film, and the second light guide member 25 is the center film of the optical filter 231. Wherein:

the excitation light source 21 emits excitation light. The excitation light source 21 is a semiconductor diode or a semiconductor diode array. The semiconductor diode may be a Laser Diode (LD), a Light Emitting Diode (LED), or the like. The exciting light is blue light, purple light or ultraviolet light, etc.

The first light guide member 23 guides the excitation light emitted from the excitation light source 21 to the wavelength conversion device 24, and guides the received laser light emitted from the wavelength conversion device 24 to the dodging device 26. In the present embodiment, the first light guiding member 23 includes a filter 231 having a center film and an edge film. The central membrane sheet and the edge membrane sheets may be an integral membrane sheet or separate membrane sheets.

Wherein the central membrane has a size smaller than the size of the edge membranes. The size of the central diaphragm can be set according to one or more combinations of the light loss amount of the first supplementary light passing through the central diaphragm, the light loss amount of the excitation light passing through the central diaphragm, and the light loss amount of the excitation light passing through the central diaphragm. The central diaphragm may be sized to have an arbitrary value such that an amount of light loss of the first supplementary light through the central diaphragm is less than a preset ratio while an amount of light loss of the stimulated light is less than the preset ratio. Preferably, the area of the central patch is less than 50% of the useful spot area.

If the wavelength conversion device 24 is a reflective wavelength conversion device, the central film of the optical filter 231 transmits the excitation light and the first complementary light and reflects part of the received laser light or reflects other light except the excitation light and the first complementary light, and the edge film of the optical filter 231 is a reflective sheet or reflects the received laser light;

if the wavelength conversion device 24 is a transmissive wavelength conversion device, the central film of the optical filter 231 transmits the first complementary light and reflects a part of the received laser light or reflects other light except the first complementary light, and the edge film of the optical filter 231 is a reflective film or reflects the received laser light. Referring to fig. 3a and 3b, an example of the filtering curves of the center film and the edge film according to the embodiment of the present invention is shown. However, the filtering curves of the central film and the edge film are not limited to fig. 3a and 3b, and may be set according to the difference of the spectral ranges of the excitation light, the first supplement light, and the received laser light. When the excitation light is light with a wavelength range less than 480nm, such as blue light, violet light or ultraviolet light, and the first supplement light is light with a wavelength range greater than 620nm, such as red light, the filter curve of the central film can be as shown in fig. 3a, and the filter curve of the edge film can be as shown in fig. 3 b. Referring to FIG. 3a, the central film reflects light with a wavelength greater than 480nm and less than 620nm and transmits light with a wavelength less than 480nm or greater than 620 nm. Referring to FIG. 3b, the edge film reflects light with a wavelength greater than 480nm and transmits light with a wavelength less than 480 nm.

In the preferred embodiment of the present invention, the first light guiding member 23 further comprises a condensing lens 232 disposed between the optical filter 231 and the optical path of the light uniformizing device 26. The condensing lens 232 is used for collecting the light guided by the filter 231 and condensing the light to the light uniformizing device 26.

The wavelength conversion device 24 receives the excitation light guided by the first light guiding member 23 or emitted directly from the excitation light source to the wavelength conversion device 24, converts the excitation light into the excited light, and emits the excited light to the first light guiding member 23. In the present embodiment, the light emitted from the wavelength conversion device 24 includes the excited light, or includes the excited light and the excitation light that is not converted by the wavelength conversion device. The wavelength conversion device 24 emits the stimulated light and the unconverted excitation light to the first light guide member 23, the edge film of the optical filter 231 in the first light guide member 23 guides the stimulated light and the unconverted excitation light to the dodging device 26, and the center film of the optical filter 231 in the first light guide member 23 reflects the light of the stimulated light and the unconverted excitation light, which is different from the spectral ranges of the excitation light emitted by the excitation light source 21 and the first complementary light emitted by the first complementary light source 22, to the dodging device 26.

The wavelength conversion device 24 may be a transmissive wavelength conversion device (e.g., including a transparent substrate and a wavelength conversion material doped within the transparent substrate) or a reflective wavelength conversion device (e.g., a wavelength conversion layer coated directly on a reflective substrate). Wherein the wavelength conversion material includes, but is not limited to, phosphor, quantum dot material, and the like. The wavelength conversion layer is a wavelength conversion material layer or a film obtained by sintering a wavelength conversion material and a binder. Preferably, the wavelength conversion material may be a yellow phosphor, a yellow-green phosphor, a green phosphor, or the like.

Referring to fig. 2, the wavelength conversion device is a reflective wavelength conversion device. The optical filter 231 included in the first light guiding member 23 is disposed between the excitation light source 21 and the optical path of the wavelength conversion device 24, the excitation light emitted from the excitation light source 21 is transmitted to the wavelength conversion device 24 through the central film of the optical filter 231, and the stimulated light emitted from the wavelength conversion device 24, or the excited light and the excitation light which is not converted by the wavelength conversion device 24, are reflected to the light uniformizing device 26 through the optical filter.

In another embodiment of the present invention, if the wavelength conversion device 24 is a transmissive wavelength conversion device (not shown), the optical filter 231 included in the first light guiding component 23 is disposed between the wavelength conversion device 23 and the optical path of the dodging device 26, and the excitation light emitted by the excitation light source 21 can be directly incident on the wavelength conversion device without being guided by the optical filter included in the first light guiding component, which reflects the stimulated light emitted by the wavelength conversion device 24, or the stimulated light and the excitation light which is not converted by the wavelength conversion device 24 to the dodging device 26.

The first supplemental light source 22 emits first supplemental light. The first supplemental light source 22 is a semiconductor diode or an array of semiconductor diodes. The semiconductor diode may be a Laser Diode (LD), a Light Emitting Diode (LED), or the like. The spectral range of the first supplement light is different from that of the exciting light, and the spectral range of the first supplement light is narrower than that of the excited light, so that the color saturation of the combined light of the excited light and the first supplement light is improved. Preferably, the etendue of the first supplementary light is smaller than the etendue of the stimulated light.

In this embodiment, the color of the first supplemental light emitted by the first supplemental light source 22 may be set according to different requirements for the stimulated light, for example, when there is no light of a certain color in the stimulated light, the first supplemental light is the light of the certain color, and for example, the first supplemental light may be red light, blue light, or the like.

In the present embodiment, the second light guiding member 25 is a central membrane of the optical filter 231 included in the first light guiding member 23. The central membrane directs the first supplemental light emitted by the first supplemental light source 22 to the light unifying means 26.

In this embodiment, the first light guide member guides the excitation light emitted by the excitation light source to the wavelength conversion device, the received laser light emitted by the wavelength conversion device is guided to the dodging device, and the second light guide member directly guides the first supplement light emitted by the first supplement light source to the dodging device, so that the combined light of the received laser light and the first supplement light can be obtained through the first light guide member and the second light guide member, and the first supplement light is not scattered by the wavelength conversion device because the first supplement light is directly guided to the dodging device by the second light guide member, thereby greatly reducing light loss of the first supplement light and improving the light utilization rate of the first supplement light.

The following describes the light source system provided by the embodiment of the present invention with a specific example. Assuming that the excitation light emitted by the excitation light source is blue excitation light, the first supplement light emitted by the first supplement light source is red light, the wavelength conversion device is a reflective wavelength conversion device, and the wavelength conversion material is yellow phosphor, the light path principle of the light source system is as follows:

the blue excitation light is transmitted to the wavelength conversion device through the central membrane on the optical filter, the blue excitation light excites the yellow fluorescent powder of the wavelength conversion device, and yellow excited light or yellow excited light and unconverted blue excitation light are emitted to the optical filter. The yellow excited light or the yellow excited light and the unconverted blue excited light which are emitted to the edge membrane of the optical filter are reflected by the edge membrane, and are incident to the light homogenizing device after being collected and converged by the condenser lens. The light in the red spectral range in the yellow excited light emitted to the central membrane of the filter and the unconverted blue excitation light are transmitted by the central membrane and lost, and the light in the green spectral range in the yellow excited light is reflected by the central membrane to the light uniformizing device.

The red light emitted by the first supplementary light source is transmitted to the light uniformizing device through the central membrane of the optical filter. Thus, red light can be supplemented in the stimulated light. The red light is not scattered by the wavelength conversion device and is directly transmitted to the light uniformizing device through the central membrane of the optical filter, so that the light loss of the red light is reduced, and the light utilization rate of the red light is improved.

Example two

Referring to fig. 4, the present embodiment provides another light source system, which is different from the light source system shown in fig. 2 in that the second light guiding member 25 uses an expansion amount to realize light splitting and light combining. Specifically, the filter 231 having the center diaphragm and the edge diaphragm in fig. 2 is replaced with a reflective sheet 431 having a through hole. In the present embodiment, the first light guiding member 43 includes a reflection sheet 431 having a through hole, and the second light guiding member 25 is a through hole on the reflection sheet 431.

Wherein the size of the through hole is smaller than that of the reflective sheet 431. The size of the through hole can be set according to one or more combinations of the light loss amount of the first supplementary light when passing through the through hole, the light loss amount of the exciting light when passing through the through hole, and the light loss amount of the laser when passing through the through hole. The size of the central membrane can be set to any value which enables the light loss amount of the first supplementary light passing through the through hole to be smaller than the preset proportion and enables the light loss amount of the excited light to be smaller than the preset proportion. Preferably, the area of the through-hole is less than 50% of the useful spot area.

In the present embodiment, the excitation light is incident to the wavelength conversion device through the through hole on the reflective sheet 431, the wavelength conversion device converts the excitation light, emits the excited light or the excited light and the unconverted excitation light to the reflective sheet 431 having the through hole, the excited light and the unconverted excitation light emitted to the through hole of the reflective sheet 431 are lost through the through hole, and the excited light and the unconverted excitation light emitted to the rest of the reflective sheet are reflected to the dodging device. The first supplemental light emitted by the first supplemental light source 22 is incident to the light uniformizing device through the through hole on the reflection sheet 431, so that the combined light of the excited light and the first supplemental light, or the combined light of the excited light, the unconverted excitation light and the first supplemental light can be obtained through the reflection sheet with the through hole. The first supplement light is directly incident to the light uniformizing device through the through hole in the reflection sheet 431, so that light loss caused by scattering of the first supplement light by the wavelength conversion device is avoided, and the light utilization rate of the first supplement light is greatly improved.

EXAMPLE III

The present embodiment provides another light source system, as shown in fig. 5, which is different from the light source system shown in fig. 2 in that the second light guiding member uses a polarization state to realize light splitting and light combining. The method specifically comprises the following steps: the optical filter 531 in the light source system includes a polarizing plate and an edge film, wherein the edge film is the same as that of the first embodiment except that the central film of the optical filter 231 in fig. 2 is replaced with a polarizing plate.

In the present embodiment, the first light guiding member 53 is a filter 531 having a polarizing plate and an edge film, and the second light guiding member 25 is a polarizing plate in the filter 531. The polarizer reflects light having a first polarization state and transmits light having a second polarization state. Wherein the first polarization state is P state and the second polarization state is S state, or the first polarization state is S state and the second polarization state is P state.

The polarizer can be a polarizer for all wavelength light, and can also be a polarizer for specified wavelength light. Wherein the polarizer for all wavelengths of light means reflecting all wavelengths of light having a first polarization state and transmitting all wavelengths of light having a second polarization state. The polarizer for the designated wavelength light reflects the designated wavelength light with a first polarization state and transmits the designated wavelength light with a second polarization state. Where a given wavelength specifies one wavelength range, multiple wavelength ranges may also be specified. Preferably, the specified wavelength is one or both of the wavelength range of the excitation light and the wavelength range of the first supplement light, and for example, the specified wavelength may be in the wavelength range of 480nm to 620nm, in which case the polarizing plate reflects light having the first polarization state in the wavelength range of 480nm to 620nm and transmits light having the second polarization state in the wavelength range of 480nm to 620 nm.

In this embodiment, when the excitation light is blue light and the polarizer is a blue light polarizer, if the light emitted from the wavelength conversion device includes unconverted blue light, a part of the unconverted blue light emitted from the wavelength conversion device to the blue light polarizer can be reflected to the dodging device by the blue light polarizer to be utilized, so as to improve the utilization rate of the blue light.

Example four

The present embodiment provides another light source system, as shown in fig. 6, which is different from the light source system shown in fig. 2, 4, and 5 in that the second light guiding member 65, the light source further includes a second supplemental light source 67.

The second supplemental light source 67 emits second supplemental light, which is guided to the light unifying device 26 by the second light guiding member 65. The second supplemental light source 67 is a semiconductor diode or an array of semiconductor diodes. The semiconductor diode may be a Laser Diode (LD), a Light Emitting Diode (LED), or the like. The spectral range of the second supplement light is different from that of the exciting light, and the spectral range of the second supplement light is narrower than that of the stimulated light, so that the color saturation of the combined light of the stimulated light, the first supplement light and the second supplement light is improved. Preferably, the etendue of the second supplementary light is smaller than the etendue of the stimulated light.

In this embodiment, the color of the second supplemental light emitted by the second supplemental light source 67 may be set according to different requirements for the combined light of the received light and the first supplemental light, for example, when there is no light of a certain color in the combined light of the received light and the first supplemental light, the second supplemental light is the light of the certain color, and for example, the second supplemental light may be blue light.

The second light guide member 65 is a central film of the optical filter 231 in the first embodiment, and transmits the excitation light, the first supplemental light, and the second supplemental light, and reflects part of the stimulated light or reflects light other than the excitation light, the first supplemental light, and the second supplemental light. Or the second light guiding member 65 is a through hole on the reflective sheet 431 having a through hole in the second embodiment. Or the second light guiding member 65 is a polarizing plate in the filter 531 in the third embodiment, the polarizing plate is a polarizing plate for one or more of the excitation light, the first supplement light, and the second supplement light, that is, the polarizing plate reflects the excitation light, the first supplement light, and the second supplement light having the first polarization state and transmits the excitation light, the first supplement light, and the second supplement light having the second polarization state.

In this embodiment, the second supplement light is supplemented to the combined light of the received light beam and the first supplement light, so that the ratio of the second supplement light to the combined light of the received light beam and the first supplement light is increased, and the brightness of the combined light is increased.

EXAMPLE five

The present embodiment provides another light source system, as shown in fig. 7, which includes two light sources, an excitation light source 71 and a first supplemental light source 72, and further includes a first light guide member 73, a wavelength conversion device 74, a second light guide member, and a light uniformizing device 76. In the present embodiment, the second light guiding member is disposed between the first light guiding member 73 and the optical path of the light unifying device 76. Wherein:

the excitation light source 71 is the same as the excitation light source 21 in the first embodiment, and the wavelength conversion device 74 is the same as the wavelength conversion device 24 in the first embodiment, which are not described again.

The first light guide member 73 guides the excitation light emitted from the excitation light source 71 to the wavelength conversion device 74, and guides the received laser light emitted from the wavelength conversion device 74 to the dodging device 76. In the present embodiment, the first light guiding part 73 includes a first optical element 731.

If the wavelength conversion device 74 is a reflective wavelength conversion device, the first optical element 731 can be disposed between the excitation light source 71 and the optical path of the wavelength conversion device 74, and the first optical element 731 transmits the excitation light and reflects the stimulated light or reflects other light except the excitation light.

If the wavelength conversion device 74 is a transmissive wavelength conversion device, the first optical element 731 can be disposed between the wavelength conversion device 74 and the light path of the light uniformizing device 76, and the first optical element 731 can be a filter for reflecting the received laser light or a reflective sheet.

In another embodiment of the present invention, the first light guiding component 73 further includes a first condenser lens 732 disposed between the first optical element 731 and the optical path of the light uniformizing device 76. The first condenser lens 732 is used for collecting the light guided by the first optical element 731 and converging the light to the light uniformizing device 76.

The first supplemental light source 72 emits first supplemental light. The first supplemental light source 72 is the same as the first supplemental light source 22 in the first embodiment, and is not described herein again.

The second light guiding member is a second optical element located between the first light guiding member 73 and the optical path of the light unifying device 76, which reflects the first supplemental light and transmits the stimulated light or a part of the stimulated light or other light except the first supplemental light to the light unifying device 76. The second optical element may be a filter 751 (shown in fig. 7) that reflects the first supplementary light and transmits the stimulated light or a part of the stimulated light or other light except the first supplementary light, or a reflective sheet 851 (shown in fig. 8), or the second optical element includes a reflective sheet and a fixing member (not shown) for fixing the reflective sheet, or a polarizing plate, etc.

The size of the reflective sheet 851 may be set according to one or a combination of a light loss amount of the first supplementary light when passing through the reflective sheet 851 and a light loss amount of the excited light when passing through the reflective sheet 851. The size of the reflective sheet 851 may be set to any value such that the amount of light loss of the first supplementary light through the reflective sheet 851 is less than a preset ratio while the amount of light loss of the received laser light is less than the preset ratio. Preferably, the area of the reflective sheet 851 is less than 50% of the useful spot area.

The polarizer may be a polarizer for the first supplemental light, i.e. the polarizer reflects the first supplemental light having the first polarization state and transmits the first supplemental light having the second polarization state.

In this embodiment, the second light guiding member is disposed between the first light guiding member and the light path of the dodging device, and the second light guiding member reflects the first supplemental light to the dodging device, so that the converging focus of the first supplemental light can be located at the front end of the light inlet of the dodging device, and compared with the case that the existing converging intersection point of the first supplemental light is located on the surface of the light inlet of the dodging device, the uniformity of the combined light of the first supplemental light and the received laser light after being dodged by the dodging device can be improved.

EXAMPLE six

The present embodiment provides another light source system, as shown in fig. 9, which is different from the light source systems shown in fig. 7 and 8 in the first supplemental light source 92. The first supplemental light source 92 includes a solid state light emitting assembly and a second condenser lens (not shown). Wherein:

and the solid-state light-emitting component is used for emitting first supplement light. The solid state lighting assembly is a single solid state lighting device or an array of solid state lighting devices including a plurality of solid state lighting devices. Wherein the solid state light emitting device can be a laser diode or a light emitting diode, etc.

And the second light condensing lens is used for condensing the first supplement light emitted by the solid-state light-emitting component to the second light guide part, and the condensing focus of the first supplement light is on the second light guide part.

In this embodiment, since the converging intersection point of the first supplemental light is on the second light guiding member, and the second light guiding member reflects the first supplemental light to the dodging device 76, so that the first supplemental light is reflected by the second light guiding member and has a certain divergence angle before being incident on the dodging device 76, and the uniformity of the combined light of the first supplemental light and the received laser light after being dodged by the dodging device can be improved.

Preferably, a difference between a convergence angle of the first supplement light and a convergence angle of the stimulated light is within a preset error range. Preferably, the preset error range is within 30%. Wherein the convergence angle of the first supplementary light refers to a convergence angle at which the second condenser lens converges the first supplementary light to the second light guiding member 75; the convergence angle of the received laser light is a convergence angle at which the first condenser lens 732 converges the received laser light to the dodging device.

In this embodiment, since the difference between the convergence angle of the first supplement light and the convergence angle of the received light is within the preset error range, the uniformity of the combined light of the received light and the first supplement light can be further improved.

Preferably, the first supplemental light source 92 further comprises an anti-coherent device (not shown) that performs an anti-coherent process on the first supplemental light emitted by the solid state light emitting assembly. The decorrelation means may be a rotating diffusor, a vibrating diffusor or the like.

In this embodiment, the first complementary light emitted by the solid-state light emitting element is subjected to the coherent elimination by the coherent elimination device, so that the speckle phenomenon caused by the combined light of the received laser light and the first complementary light is avoided.

EXAMPLE seven

The present embodiment provides another light source system, as shown in fig. 10, which is different from the light source system shown in fig. 7, 8, and 9 in the first light guide member 103, and which further includes a second supplemental light source 107. The second supplemental light source 107 emits second supplemental light, which is guided to the light unifying device 76 by the first light guiding member 103.

The second supplemental light source 107 is a semiconductor diode or an array of semiconductor diodes. The semiconductor diode may be a Laser Diode (LD), a Light Emitting Diode (LED), or the like. The spectral range of the second supplement light is different from that of the exciting light, and the spectral range of the second supplement light is narrower than that of the stimulated light, so that the color saturation of the combined light of the stimulated light, the first supplement light and the second supplement light is improved. Preferably, the etendue of the second supplementary light is smaller than the etendue of the stimulated light.

The first light guide member 103 guides the excitation light emitted from the excitation light source 71 to the wavelength conversion device 74, guides the received laser light emitted from the wavelength conversion device 74 to the light unifying device 76, and guides the second complementary light emitted from the second complementary light source 103 to the light unifying device 76. In the present embodiment, the first light guiding member 103 includes a first optical element that transmits the excitation light and the second complementary light and reflects a part of the stimulated light or reflects light other than the excitation light and the second complementary light.

In the present embodiment, if the wavelength conversion device 74 is a reflective wavelength conversion device, the first optical element may be disposed between the excitation light source 71 and the optical path of the wavelength conversion device 74. The first optical element is a filter (not shown) that transmits the excitation light and the second complementary light and reflects a part of the stimulated light or reflects light other than the second complementary light, or the first optical element is a filter 1031 having a center diaphragm and an edge diaphragm (as shown in fig. 10), or the first optical element is a reflection plate (not shown) having a through hole, or a filter (not shown) having a polarization plate and an edge diaphragm.

The difference between the filter 1031 having the center membrane and the edge membrane and the filter having the center membrane and the edge membrane in the fifth embodiment is that the center membrane of the filter is a membrane that transmits the excitation light and the second complementary light and reflects part of the stimulated light or reflects other light except the excitation light and the second complementary light.

The polarizer may be a polarizer for the excitation light and the second supplementary light, i.e. the polarizer reflects the excitation light and the second supplementary light having the first polarization state and transmits the excitation light and the second supplementary light having the second polarization state.

If the wavelength conversion device 74 is a transmissive wavelength conversion device, the first optical element may be disposed between the wavelength conversion device 74 and the optical path of the light uniformizing device 76, and the first optical element may be a film that transmits the second complementary light and reflects the received laser light or a part of the received laser light or reflects other light except the second complementary light, for example, the first optical element is a filter that transmits the second complementary light and reflects the received laser light or a part of the received laser light or reflects other light except the second complementary light, or the first optical element is a filter having a central film and an edge film, or the first optical element is a reflective sheet having a through hole, or a filter having a polarizer and an edge film. Wherein the central membrane transmits the second complementary light and reflects part of the stimulated light or reflects other light than the second complementary light. The polarizer is a polarizer for the second supplemental light, i.e., the polarizer reflects the second supplemental light having the first polarization state and transmits the second supplemental light having the second polarization state.

In another embodiment of the present invention, the first light guiding component 103 further comprises a first condenser lens 1032 disposed between the first optical element and the optical path of the light unifying device 76. The first light collecting lens 1032 is the same as the light collecting lens 732 in the fifth embodiment, and thus, the description thereof is omitted.

Example eight

The present embodiment provides another light source system, as shown in fig. 11, which is different from the light source system shown in fig. 7, 8, and 9 in the second light guide member, and which further includes a second supplemental light source 117. The second supplemental light source 117 emits second supplemental light that is guided to the light unifying means 76 by the second light guiding member. The second supplemental light source 117 is the same as the second supplemental light source 107 in the seventh embodiment, and is not described herein.

The second light guide member is different from the second light guide member 75 in the fifth embodiment in that the second optical element reflects the first supplemental light and the second supplemental light to the light unifying device 76, and transmits the stimulated light or a part of the stimulated light or other light except the first supplemental light and the second supplemental light to the light unifying device 76.

Preferably, the optical path of the second supplemental light source 117 is the same as the optical path of the first supplemental light source 72, or the optical path of the second supplemental light emitted from the second supplemental light source 117 is merged into the optical path of the first supplemental light before the first supplemental light is condensed by the second condensing lens to the second light guide member. In this embodiment, since the optical paths of the first supplemental light and the second supplemental light are the same, the illuminance distributions of the first supplemental light and the second supplemental light formed at the end of the dodging device 76 are approximately the same, so that the uniformity of the combined light of the received laser light, the first supplemental light, and the second supplemental light can be further improved.

In another embodiment of the present invention, the second supplemental light source 117 has the same structure as the first supplemental light source 92 in the sixth embodiment, and is not described herein again.

The invention also provides a projection device which comprises the light source system in any one of the embodiments.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structures or direct and indirect applications of the contents of the specification and drawings of the present invention in other related technical fields are considered to be included in the scope of the present invention.

Claims

1. A light source system comprising an excitation light source, a first supplemental light source, a second supplemental light source, a first light directing component, a wavelength conversion device, a second light directing component, wherein:

the excitation light source is used for emitting excitation light;

the first supplement light source is used for emitting first supplement light;

the second supplement light source is used for emitting second supplement light;

the first light guide member is used for guiding the exciting light to the wavelength conversion device and guiding the excited light emitted from the wavelength conversion device;

the wavelength conversion device is used for converting the exciting light into stimulated light and emitting the stimulated light to the first light guide component so that at least part of the stimulated light is guided and emitted through the first light guide component;

the optical expansion of the first supplement light is smaller than that of the stimulated light, and the optical expansion of the second supplement light is smaller than that of the stimulated light; the size of the second light guiding member is smaller than that of the first light guiding member;

the second light guide component is used for guiding at least the first supplementary light and the second supplementary light, so that the first supplementary light, the second supplementary light and at least part of the excited light are emitted from the same emitting channel.

2. The light source system of claim 1, wherein the excitation light is blue light, violet light, or ultraviolet light.

3. The light source system of claim 1, wherein the spectral range of the second supplemental light is different from the spectral range of the excitation light, and the spectral range of the second supplemental light is narrower than the spectral range of the stimulated light.

4. The light source system of claim 1, wherein the wavelength conversion device comprises a wavelength conversion material, and the wavelength conversion material is a yellow phosphor.

5. The light source system of claim 1, further comprising an integrator positioned on the exit channel.

6. The light source system of claim 1, wherein the first light directing component transmits the excitation light and reflects at least a portion of the stimulated light.

7. The light source system according to claim 1, wherein the second light guiding member transmits the first supplemental light and the second supplemental light.

8. A light source system comprising an excitation light source, a first supplemental light source, a second supplemental light source, a first light directing component, a wavelength conversion device, a second light directing component, wherein:

the excitation light source is used for emitting excitation light;

the first supplement light source is used for emitting first supplement light;

the second supplementary light source is used for emitting second supplementary light which is guided and emitted by the first light guide part or the second light guide part;

the first light guide member is at least used for guiding the exciting light to the wavelength conversion device and guiding the excited light emitted from the wavelength conversion device;

the second light guide component is at least used for guiding the first supplementary light, so that the first supplementary light, the second supplementary light and at least part of the excited light are emitted from the same emission channel;

the optical expansion of the first supplement light is smaller than that of the stimulated light, and the optical expansion of the second supplement light is smaller than that of the stimulated light; the second light guiding member has a size smaller than that of the first light guiding member.

9. The light source system according to claim 8, wherein the second light guiding member is provided on an optical path after the excited light exits from the first light guiding member to reflect at least the first complementary light.

10. The light source system according to claim 8, wherein the second light guide member is provided on an optical path after the light receiving beam exits from the first light guide member, and is a filter that reflects the first and second complementary beams and transmits at least a part of the light receiving beam.

11. The light source system according to claim 8, wherein the second light guiding member is disposed on a light path after the excited light is emitted from the first light guiding member, and includes a reflective sheet that reflects at least a portion of the first and second complementary lights to the emission channel, and at least a portion of the excited light is emitted to the emission channel without being reflected by the reflective sheet.

12. The light source system of claim 11, wherein the first supplemental light source comprises a solid state light emitting assembly and a second condenser lens, wherein:

the solid-state light-emitting component is used for emitting the first supplement light;

the second condensing lens is used for condensing the first supplementary light emitted by the solid-state light-emitting component to the second light guide component, and the condensing focus of the first supplementary light is on the second light guide component.

13. A projection device characterized in that it comprises a light source system according to any one of claims 1 to 12.