CN111221211A - Light source device and laser projection apparatus - Google Patents
Light source device and laser projection apparatus Download PDFInfo
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- CN111221211A CN111221211A CN202010197607.9A CN202010197607A CN111221211A CN 111221211 A CN111221211 A CN 111221211A CN 202010197607 A CN202010197607 A CN 202010197607A CN 111221211 A CN111221211 A CN 111221211A
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- light
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- polarization direction
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
- G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2073—Polarisers in the lamp house
Abstract
The application discloses light source device and laser projection equipment belongs to laser technical field. In the light source device, a first sector of the color filter wheel can guide light in a first polarization direction to the polarization converter and guide light in a second polarization direction to the optical machine illumination device, and a second sector can guide first color light to the fluorescent powder wheel and guide other color light except the first color light to the optical machine illumination device; the polarization converter is positioned on the light path of the first sector, can convert the light in the first polarization direction emitted from the first sector into the light in the second polarization direction, and can emit the light in the second polarization direction to the first sector; the fluorescent wheel is positioned on the light path of the second sector, can emit other colored light except the first colored light under the excitation of the first colored light emitted from the second sector, and can reflect other colored light to the second sector. The problem that the structure of the light source device in the related art is complex is solved, and the effect of simplifying the structure of the light source device is achieved.
Description
Technical Field
The present application relates to the field of laser technology, and in particular, to a light source device and a laser projection apparatus.
Background
Currently, a laser projector may include a light source device for providing light to an optical-machine illumination device and an optical-machine illumination device for outputting the light.
A light source device comprises a laser and a light path component, wherein the laser is used for outputting laser, and the light path component comprises a dichroic sheet, a fluorescent powder wheel, a color filter wheel and the like. When the laser emitted by the laser irradiates the blue light area of the fluorescent powder wheel, the laser transmits the fluorescent powder wheel, passes through the reflector and the blue light loop, irradiates the filter wheel and then enters the optical machine illumination device.
The structure of the light source device is complex.
Disclosure of Invention
The embodiment of the application provides a light source device and laser projection equipment, and can solve the problem that the structure of the light source device is complex in the related art. The technical scheme is as follows:
in one aspect, a light source device is provided, which includes a laser assembly, a color filter wheel, a phosphor wheel, and a polarization converter;
the laser assembly is configured to provide a first polarization direction of the first color light to the color filter wheel;
the color filter wheel comprises a first sector and a second sector, the first sector can guide the light with the first polarization direction to the polarization converter and guide the light with the second polarization direction to the optical machine illuminating device, and the second sector can guide the first color light to the fluorescent powder wheel and guide other color lights except the first color light to the optical machine illuminating device;
the polarization converter is positioned on the optical path of the first sector, and can convert the light in the first polarization direction emitted from the first sector into the light in the second polarization direction and emit the light in the second polarization direction to the first sector;
the fluorescent powder wheel is positioned on the light path of the second sector, can emit other colored light except the first colored light under the excitation of the first colored light emitted from the second sector, and reflects the other colored light to the second sector.
Optionally, the first sector can reflect light with the first polarization direction and transmit light with a second polarization direction, and the second sector can transmit the first color light and reflect other color lights except the first color light.
Optionally, the first sector can transmit light with the first polarization direction and reflect light with the second polarization direction, and the second sector can reflect the first color light and transmit other color lights except the first color light.
Optionally, the polarization converter includes a 1/4 glass slide and a reflective sheet sequentially arranged in a direction away from the color filter wheel.
Optionally, the phosphor wheel includes a phosphor region and a non-phosphor region;
the color filter wheel and the fluorescent powder wheel rotate synchronously, when the color filter wheel rotates to enable the first color light emitted by the laser component to irradiate the second sector, the fluorescent powder wheel rotates to enable the light emitted by the second sector to irradiate the fluorescent powder area, and when the color filter wheel rotates to enable the first color light emitted by the laser component in the first polarization direction to irradiate the first sector, the fluorescent powder wheel rotates to the non-fluorescent area.
Optionally, the second sector includes at least two sub-sectors, the at least two sub-sectors are in one-to-one correspondence with at least two color lights, and any one of the sub-sectors can reflect or transmit a corresponding color light.
Optionally, the number of the sub-sectors is 3, and 3 sub-sectors respectively correspond to yellow light, green light, and red light.
Optionally, the first color light is blue light.
Optionally, the color filter wheel and the light emitting direction of the laser component have an included angle of 45 degrees.
In another aspect of the present invention, a laser projection apparatus is provided, which includes the light source device of the first aspect.
The technical scheme provided by the embodiment of the application has the following beneficial effects:
providing a light source device, wherein a laser component provides first color light with a first polarization direction to a color filter wheel, the color filter wheel comprises a first sector and a second sector, the first sector can guide the light with the first polarization direction to a polarization converter, the polarization converter converts the light with the first polarization direction into light with a second polarization direction, and then the light with the second polarization direction is transmitted to an optical machine illumination device through the first sector; the second sector guides the first color light to the fluorescent powder wheel, emits other color light except the first color light through the excitation of the fluorescent powder wheel, reflects the other color light to the second sector, and then guides the other color light to the light machine illumination device through the second sector. The device divides the color filter wheel into two different sectors, can directly reflect and transmit different light rays, does not need to set other light ray reflection loops, solves the problem that the structure of a light source device in the related art is complex, and achieves the effect of simplifying the structure of the light source device.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic illustration of an implementation environment to which embodiments of the present application relate;
FIG. 2 is a schematic structural diagram of the light source device shown in FIG. 1;
fig. 3 is a schematic structural diagram of a light source device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a color filter wheel according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another light source device according to an embodiment of the present disclosure;
FIG. 6 is a top view of the phosphor wheel of FIG. 5;
FIG. 7 is a top view of the color filter wheel of FIG. 5;
fig. 8 is a schematic structural diagram of another light source device according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a laser projector according to an embodiment of the present disclosure.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an implementation environment according to an embodiment of the present disclosure, which may include a laser projector 10 and a projection curtain 20.
The laser projector 10 may include a light source device 11 and an optical engine illumination device 12. The light source device 11 is used for providing a light source to the optical machine illumination device 12, and the optical machine illumination device 12 is used for projecting a preset pattern onto the projection curtain 20 according to the light source provided by the light source device 11.
The projection curtain 20 is used for carrying the pattern projected by the optical machine illumination device 12. The projection screen 20 may be made of various materials, such as Polyvinyl chloride (PVC), metal, glass fiber, glass beads, etc., and the present embodiment is not limited thereto.
Fig. 2 is a schematic structural diagram of a light source device in the related art. The light source device 11 includes a laser component 111, a dichroic sheet 112, a phosphor wheel 113, a reflector set, a color filter wheel 115, and a light homogenizing rod 116, wherein the light path of the dotted arrow in the figure is the light path of other color lights excited by the phosphor wheel, the light path of the solid arrow is the light path of blue light, and the reflector set includes at least three reflective lenses 1141, 1142, and 1143. The dichroic mirror 112 can control the laser light emitted through the laser assembly 111 or other color light emitted by the reflective phosphor wheel 113 when excited.
Blue light emitted by the laser component 111 passes through the dichroic directional sheet 112 and is focused by the lens and then irradiates the fluorescent powder wheel 113, wherein the fluorescent powder wheel 113 is divided into a light-transmitting area and other color areas, different areas of the fluorescent powder wheel 113 irradiated by the blue light emitted by the laser component 111 can be changed by rotation, when the fluorescent powder wheel 113 rotates to other color areas, the fluorescent powder wheel 113 reflects other excited color lights back to the dichroic directional sheet 112, the dichroic directional sheet 112 guides the blue light to the color filter wheel 115 and then enters the light homogenizing rod 116, and the blue light enters the light machine illumination device through the light homogenizing rod 116. When the phosphor wheel 113 rotates to the transparent area, the blue light enters the reflector area through the transparent area of the phosphor wheel 113, and after being reflected for multiple times by the reflection lenses 1141, 1142, and 1143, the blue light is input to the dichroic direction sheet 112 again, and then is guided by the dichroic direction sheet 112 to the color filter wheel 115, enters the light homogenizing rod 116, and enters the optical machine illumination device through the light homogenizing rod 116.
Among the above-mentioned light source device, the blue light need be through multiple reflection in order to get into the dichroism again to the piece after the printing opacity district of phosphor powder wheel, and the blue light path is comparatively complicated, leads to the reflector plate to be more in quantity, and a plurality of reflector plates have taken up great space in the light source device. In addition, in the working process of the light source device, the laser emitted by the laser component always irradiates the fluorescent powder wheel, so that the temperature of the fluorescent powder wheel is higher, and the efficiency of converting the colored light of the fluorescent powder wheel is reduced.
The embodiment of the application provides a light source device and a laser projection device, which can solve the problems in the related art.
Fig. 3 is a schematic structural diagram of a light source device provided in an embodiment of the present application, where the light source device 30 includes a laser assembly 31, a color filter wheel 32, a phosphor wheel 33, and a polarization converter 34. Fig. 4 is a schematic structural diagram of the color filter wheel in fig. 3.
The color filter wheel 32 includes a first sector 321 and a second sector 322, the first sector 321 being capable of directing light of the first polarization direction to the polarization converter 34 and directing light of the second polarization direction to the light engine illumination device 50, and the second sector 322 being capable of directing light of the first color to the phosphor wheel 33 and directing light of colors other than the first color to the light engine illumination device 50.
The polarization converter 34 is located on the optical path of the first sector 321, and is capable of converting the light of the first polarization direction emitted from the first sector 321 into the light of the second polarization direction, and emitting the light of the second polarization direction to the first sector 321.
The phosphor wheel 33 is positioned on the optical path of the second sector 322, and can emit light of a color other than the first color by excitation of the first color emitted from the second sector 322, and reflect the light of the other color toward the second sector 322.
The color filter wheel is in a rotating mode in fig. 3, and the first sector and the second sector sequentially pass through the laser assembly in a rotating time sequence to provide a light path of the first color light in the first polarization direction.
In summary, the embodiment of the present application provides a light source device, wherein a laser assembly provides a first color light with a first polarization direction to a color filter wheel, the color filter wheel includes a first sector and a second sector, the first sector can guide light with the first polarization direction to a polarization converter, the polarization converter converts the light with the first polarization direction into light with a second polarization direction, and then transmits the light with the second polarization direction through the first sector to emit the light to an optical machine illumination device; the second sector guides the first color light to the fluorescent powder wheel, emits other color light except the first color light through the excitation of the fluorescent powder wheel, reflects the other color light to the second sector, and then guides the other color light to the light machine illumination device through the second sector. The device divides the color filter wheel into two different sectors, can directly reflect and transmit different light rays, does not need to set other light ray reflection loops, solves the problem that the structure of a light source device in the related art is complex, and achieves the effect of simplifying the structure of the light source device.
Fig. 5 is a schematic structural diagram of another light source device 30 according to an embodiment of the present disclosure.
Optionally, the first sector area can reflect light with the first polarization direction and transmit light with the second polarization direction, and the second sector area can transmit the first color light and reflect other color lights except the first color light. The first sector of the color filter wheel 32 can receive the first color light with the first polarization direction emitted by the laser component 31, and guide the light with the first polarization direction to the polarization converter 34, the polarization converter 34 converts the light with the first polarization direction into the light with the second polarization direction, and then reflects the light with the second polarization direction to the first sector of the color filter wheel 32, and the first sector transmits the light with the second polarization direction and guides the light with the second polarization direction into the light homogenizing rod 35, and then enters the optical machine illumination device from the light homogenizing rod 35. Compared with the prior art that the blue light emitted by the laser component enters the optical machine lighting device after passing through the multiple reflectors, the light path is shortened, the using number of the reflectors is reduced, the complexity of the light path is reduced, and the structural space of the light source device is reduced. The second sector of the color filter wheel 32 may guide the first color light to the phosphor wheel 33, the first color light forms other color light after being excited by the phosphor wheel 33, the phosphor wheel 33 reflects the other color light back to the second sector of the color filter wheel 32, and the second sector of the color filter wheel 32 guides the other color light to the light homogenizing rod 35 and then enters the optical machine illumination device from the light homogenizing rod 35. The light homogenizing rod 35 may be a rectangular light homogenizing rod, that is, the light incident surface and the light emitting surface are both rectangular, and other forms of light homogenizing components may also be selected.
Optionally, the polarization converter 34 includes a 1/4 glass 341 and a reflective sheet 342 sequentially disposed in a direction away from the color filter wheel 32. The wave Plate is an optical element for changing the polarization state of light, and the 1/4 glass Plate (English: Quarter-wave Plate) is a birefringent single crystal wave Plate with a certain thickness, and when light with a certain wavelength is vertically incident and passes through, the phase difference between the emergent ordinary light and the emergent abnormal light is 1/4 wavelength. When the 1/4 glass slide is positioned in the light path, the linearly polarized light can be changed into circularly polarized light or elliptically polarized light, or vice versa. In the embodiment of the present application, the color filter wheel 32 reflects the light with the first polarization direction to the 1/4 glass 341, and the reflective sheet 342 is an optical element that works according to the law of reflection, that is, a mirror. The reflection plate 342 reflects the light transmitted through the 1/4 wave plate back to the 1/4 wave plate 341, and the light of the first polarization direction becomes the light of the second polarization direction after 2 times of passing through the 1/4 glass plate 341. And then passes through the color filter wheel 32, the first sector of the color filter wheel 32 transmits the light of the second polarization direction, so that the light of the second polarization direction enters the light homogenizing rod 35, and then enters the optical machine illumination device through the light homogenizing rod 35.
Fig. 6 is a top view of the phosphor wheel of fig. 5.
Optionally, the phosphor wheel 33 includes a phosphor region 331 and a non-phosphor region 332; the color filter wheel 32 and the phosphor wheel 33 rotate synchronously, when the color filter wheel 32 rotates to make the first color light emitted from the laser component 31 irradiate the second sector, the phosphor wheel 33 rotates to make the light emitted from the second sector of the color filter wheel 32 irradiate the phosphor area 331, and when the color filter wheel 32 rotates to make the first color light of the first polarization direction emitted from the laser component 31 irradiate the first sector, the phosphor wheel 32 rotates to the non-fluorescent area 332. The display light source for projection is red, green and blue laser, and the laser assembly 31 generally emits blue laser, wherein the red light and the green light are formed by exciting the red light and the green light through the fluorescent powder wheel 33 in the process of light path.
The back plate of the phosphor wheel 33 used in the embodiment of the present application is a total reflection mirror. The phosphor area 331 is an area coated with a phosphor coating, and blue laser light emitted by the laser component 31 is changed into other color fluorescence under excitation of the phosphor coating, and the other color fluorescence is reflected back to the color filter wheel by the reflector back plate. The intensity of the other color phosphor is determined by the brightness of the blue light and the conversion efficiency of the phosphor, and the phosphor region 331 can also be referred to as a wavelength conversion region. Because the color filter wheel 32 and the phosphor powder wheel 33 rotate synchronously, when the phosphor powder wheel 33 rotates to the phosphor powder area 331, the color filter wheel 32 rotates to the second sector, at this time, the first color light emitted by the laser component 31 irradiates to the second sector, and irradiates to the phosphor powder area 331 through the second sector, the excited fluorescence is reflected back to the second sector in the color filter wheel, and is reflected to the light homogenizing rod 35 by the second sector, and then enters into the optical machine illumination device through the light homogenizing rod. The non-fluorescent area 332 is an area without being coated with the phosphor, when the phosphor wheel 33 rotates to the non-fluorescent area 332, the color filter wheel 32 rotates to the first sector, and the first color light emitted by the laser component 31 is directly reflected to the 1/4 glass 341 after being irradiated to the first sector, that is, the phosphor wheel 33 is not irradiated by the laser, so that the problem of temperature rise caused by long-time irradiation of the phosphor wheel 33 can be solved.
Optionally, the second sector includes at least two sub-sectors, the at least two sub-sectors are in one-to-one correspondence with the at least two color lights, and any sub-sector can reflect or transmit the corresponding color light. The color filter wheel 32 can improve the purity of the fluorescent laser light excited by the phosphor wheel 33, and since the laser light excited by the phosphor wheel 33 includes red fluorescent light and green fluorescent light, when the color filter wheel 32 and the phosphor wheel 33 rotate synchronously, the second sector of the color filter wheel 32 and the phosphor area of the phosphor wheel 33 can sequentially output three primary colors. For example, when the phosphor wheel 33 outputs green light, the color filter wheel 32 simultaneously rotates to the green filter region, and when the phosphor wheel 33 outputs red light, the color filter wheel 32 simultaneously rotates to the red filter region. The second sector may also include only one sub-sector, one sub-sector including at least one phosphor thereon.
Fig. 7 is a top view of the color filter wheel of fig. 5.
Optionally, the number of sub-sectors is 3, and 3 sub-sectors correspond to yellow light, green light, and red light, respectively. The 3 sub-sectors in the second sector 322 are a red light filter region R, a green light filter region G, and a yellow light region Y, respectively, where the red light filter region R and the green light filter region G are used to improve the purities of the red laser light and the green laser light. The yellow region Y may improve the brightness of the light source. The number and arrangement sequence of the specific sub-sectors in the color filter wheel 32 can be determined according to the structure of the phosphor wheel and the related requirements, and the embodiment of the present application is not limited herein.
Optionally, the first color light is blue light. The first color light is emitted by the laser assembly 31, and the laser assembly 31 may include a laser 311, a beam reduction lens 312, and a condenser lens 313. When the laser 311 is a blue laser, the emitted first color light is blue light, the beam shrinking lens 312 is configured to shrink the blue light emitted by the laser 311 and guide the blue light to the condensing lens 313, and the condensing lens 313 polymerizes the shrunk blue light and guides the blue light to the color filter wheel 32. The laser 311 used in the present application is a laser that can emit blue light, and the specific laser model is not limited herein.
Optionally, the color filter wheel 32 and the light emitting direction of the laser component 31 have an included angle of 45 degrees. The color filter wheel 32 can guide the light with the first polarization direction emitted by the laser component 31 to the polarization converter 34, guide the light with the second polarization direction to the light homogenizing rod 35, guide the first color light to the phosphor wheel 33, and guide the color lights except the first color light to the light homogenizing rod 35, and when the included angle between the color filter wheel 32 and the light emitting direction of the laser component 31 is 45 degrees, the color filter wheel 32 can complete the above functions of receiving, transmitting and reflecting the light. The included angle between the color filter wheel 32 and the light emitting direction of the laser module 31 may also be between 40 degrees and 50 degrees, wherein when the included angle between the color filter wheel 32 and the light emitting direction of the laser module 31 is changed, the positions of the phosphor wheel 33 and the polarization converter 34 may be adjusted at the same time, so as to ensure that the color filter wheel 32 can transmit and reflect light while receiving light.
In addition, a lens may be disposed between the color filter wheel 32 and the phosphor wheel 33, and a lens may also be disposed between the color filter wheel 32 and the light homogenizing rod 35. The specific position and number of the lenses can be changed according to the size of the light source device and the position of other lenses, and the embodiments of the present application are not limited herein.
After the light source device provided in the embodiment of the present application is turned on, an optical line in the light source device is as shown in fig. 5, a laser 311 emits a blue laser in a first polarization direction, and the blue laser enters a condenser lens 313 after passing through a beam shrinking lens 312, and at this time, the color filter wheel 32 and the phosphor wheel 33 synchronously rotate according to a time sequence, which is divided into the following two cases:
when the color filter wheel 32 rotates to the second sector, the phosphor wheel 33 rotates to the phosphor area, the second sector of the color filter wheel 32 transmits the blue laser in the first polarization direction and guides the light to the phosphor area of the phosphor wheel 33, the blue laser is converted into red phosphor under the excitation of the phosphor coating, the back plate of the reflector of the phosphor wheel 33 reflects the red phosphor to the red light filter area in the second sector of the color filter wheel 32, the red light filter area of the second sector transmits the red phosphor and then reflects the red phosphor to the light homogenizing rod 35, and the light homogenizing rod 35 guides the red phosphor to the optical machine illumination device. The optical line of green fluorescence is the red fluorescence as described above, and the embodiments of the present application are not described herein.
When the color filter wheel 32 rotates to the first sector, the phosphor wheel 33 rotates to the non-fluorescent area, and at this time, the blue laser light with the first polarization direction is reflected to the 1/4 glass 341 by the first sector of the color filter wheel 32, passes through the 1/4 glass 341 to the reflective plate 342, and the reflective plate 342 reflects the blue laser light back to the 1/4 wave plate. After passing through the 1/4 wave plate for 2 times, the blue laser with the first polarization direction is converted into the blue laser with the second polarization direction and then emitted out, and then the blue laser irradiates the first sector of the color filter wheel 32, the first sector of the color filter wheel 32 transmits the blue laser with the second polarization direction and guides the blue laser with the second polarization direction into the dodging rod 35, and the blue laser after passing through the dodging rod 35 enters the optical machine illumination device. In the process, the blue laser does not need to be reflected for multiple times by a plurality of reflectors, the light path of the blue laser is simple, the structural complexity of the light source device is reduced, and the structural volume of the light source device is reduced. Meanwhile, the first sector does not guide the laser to the fluorescent powder wheel, and the fluorescent powder wheel is not irradiated by the laser, so that the temperature of the fluorescent powder wheel can be reduced, and the working efficiency of the fluorescent powder wheel is improved.
In summary, the embodiment of the present application provides a light source device, wherein a laser assembly provides a first color light with a first polarization direction to a color filter wheel, the color filter wheel includes a first sector and a second sector, the first sector can guide light with the first polarization direction to a polarization converter, the polarization converter converts the light with the first polarization direction into light with a second polarization direction, and then transmits the light with the second polarization direction through the first sector to emit the light to an optical machine illumination device; the second sector guides the first color light to the fluorescent powder wheel, emits other color light except the first color light through the excitation of the fluorescent powder wheel, reflects the other color light to the second sector, and then guides the other color light to the light machine illumination device through the second sector. The device divides the color filter wheel into two different sectors, can directly reflect and transmit different light rays, does not need to set other light ray reflection loops, solves the problem that the structure of a light source device in the related art is complex, and achieves the effect of simplifying the structure of the light source device.
Fig. 8 is a schematic structural diagram of another light source device according to an embodiment of the present disclosure.
Optionally, the first sector area can transmit light with a first polarization direction and reflect light with a second polarization direction, and the second sector area can reflect the first color light and transmit other color lights except the first color light. When the polarization converter 34 is located on the optical path of the first color light with the first polarization direction emitted from the laser assembly 31, the phosphor wheel 33 may be disposed in a direction perpendicular to the optical path of the polarization converter 34 and at a position capable of receiving the light reflected by the color filter wheel 32. When the structure of the light source device is as shown in fig. 8, the first sector of the color filter wheel 32 is configured to transmit the light with the first polarization direction emitted from the laser module 31, guide the light with the first polarization direction to the 1/4 glass 341, transmit through the 1/4 glass 341, be reflected back to the 1/4 glass 341 again by the reflective sheet 342, pass through the 1/4 wave plate for 2 times, convert the light with the first polarization direction into the light with the second polarization direction, emit the light, and irradiate the light to the first sector, where the first sector of the color filter wheel 32 directly reflects the light with the second polarization direction to the light uniformizer 35. The second sector of the color filter wheel 32 reflects the first color light with the first polarization direction emitted by the laser component 31 to the phosphor wheel 33, and the phosphor wheel 33 excites the first color light into other color lights and then reflects the other color lights back to the second sector, at this time, the second sector of the color filter wheel 32 transmits the other color lights and guides the other color lights to the light homogenizing rod 35.
After the light source device provided in the embodiment of the present application is turned on, an optical line in the light source device is as shown in fig. 8, a laser 311 emits a blue laser in a first polarization direction, and the blue laser enters a condenser lens 313 after passing through a beam shrinking lens 312, and at this time, the color filter wheel 32 and the phosphor wheel 33 synchronously rotate according to a time sequence, which is divided into the following two cases:
when the color filter wheel 32 rotates to the first sector, the phosphor wheel 33 rotates to the non-fluorescent area, at this time, the first sector of the color filter wheel 32 transmits the blue laser in the first polarization direction and guides the light to the 1/4 glass 341, the light is reflected back to the 1/4 glass 341 by the reflector 342 after passing through the 1/4 glass 341 for 2 times, the blue laser in the first polarization direction is converted into the blue laser in the second polarization direction and then emitted, and then the blue laser is irradiated to the first sector of the color filter wheel 32, the first sector reflects the blue laser in the second polarization direction to the light homogenizing rod 35, and the blue laser after passing through the light homogenizing rod enters the light machine illumination device. In the process, the blue laser can enter the optical machine lighting device only through the reflection of the first sector. The blue laser light path is simple, the structural complexity of the light source device is reduced, and the structural volume of the light source device is reduced.
When the color filter wheel 32 rotates to the second sector, the phosphor wheel 33 rotates to the phosphor area, the second sector of the color filter wheel 32 reflects the blue laser in the first polarization direction to the phosphor area of the phosphor wheel 33, the blue laser is converted into green phosphor under the excitation of the phosphor coating, the reflector back plate of the phosphor wheel 33 reflects the green phosphor back to the green filter area of the second sector of the color filter wheel 32, the second sector transmits the green phosphor and guides the green phosphor to the light homogenizing rod 35, and the green phosphor passing through the light homogenizing rod 35 enters the light machine illumination device. The optical line of the red fluorescence is the same as the green fluorescence, and the details of the embodiment of the present application are not repeated herein. The fluorescent powder wheel receives laser irradiation when rotating to the fluorescent powder area, and does not have laser irradiation when rotating to the non-fluorescent area, so that the temperature of the fluorescent powder wheel can be reduced, and the working efficiency of the fluorescent powder wheel is improved.
In summary, the embodiment of the present application provides a light source device, wherein a laser assembly provides a first color light with a first polarization direction to a color filter wheel, the color filter wheel includes a first sector and a second sector, the first sector can guide light with the first polarization direction to a polarization converter, the polarization converter converts the light with the first polarization direction into light with a second polarization direction, and then transmits the light with the second polarization direction through the first sector to emit the light to an optical machine illumination device; the second sector guides the first color light to the fluorescent powder wheel, emits other color light except the first color light through the excitation of the fluorescent powder wheel, reflects the other color light to the second sector, and then guides the other color light to the light machine illumination device through the second sector. The device divides the color filter wheel into two different sectors, can directly reflect and transmit different light rays, does not need to set other light ray reflection loops, solves the problem that the structure of a light source device in the related art is complex, and achieves the effect of simplifying the structure of the light source device.
As shown in fig. 9, which is a schematic structural diagram of a laser projector according to an embodiment of the present disclosure, the laser projector 40 may include an optical-engine illumination device 50 and any one of the light source devices 30 according to the embodiments.
The light emitted from the light source device 30 is input into the optical device illumination device 50, and the optical device illumination device 50 can perform projection by using the light.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A light source device is characterized by comprising a laser component, a color filtering wheel, a fluorescent powder wheel and a polarization converter;
the laser assembly is configured to provide a first polarization direction of the first color light to the color filter wheel;
the color filter wheel comprises a first sector and a second sector, the first sector can guide the light with the first polarization direction to the polarization converter and guide the light with the second polarization direction to the optical machine illuminating device, and the second sector can guide the first color light to the fluorescent powder wheel and guide other color lights except the first color light to the optical machine illuminating device;
the polarization converter is positioned on the optical path of the first sector, and can convert the light in the first polarization direction emitted from the first sector into the light in the second polarization direction and emit the light in the second polarization direction to the first sector;
the fluorescent powder wheel is positioned on the light path of the second sector, can emit other colored light except the first colored light under the excitation of the first colored light emitted from the second sector, and reflects the other colored light to the second sector.
2. The light source device according to claim 1, wherein the first sector section is capable of reflecting light of the first polarization direction and transmitting light of a second polarization direction, and the second sector section is capable of transmitting the first color light and reflecting light of colors other than the first color light.
3. The light source device according to claim 1, wherein the first sector section is capable of transmitting light of the first polarization direction and reflecting light of a second polarization direction, and the second sector section is capable of reflecting the first color light and transmitting light of colors other than the first color light.
4. The light source device of claim 1, wherein the polarization converter comprises a 1/4 glass slide and a reflective sheet sequentially arranged in a direction away from the color filter wheel.
5. The light source device of claim 1, wherein the phosphor wheel comprises a phosphor region and a non-phosphor region;
the color filter wheel and the fluorescent powder wheel rotate synchronously, when the color filter wheel rotates to enable the first color light emitted by the laser component to irradiate the second sector, the fluorescent powder wheel rotates to enable the light emitted by the second sector to irradiate the fluorescent powder area, and when the color filter wheel rotates to enable the first color light emitted by the laser component in the first polarization direction to irradiate the first sector, the fluorescent powder wheel rotates to the non-fluorescent area.
6. The light source device of claim 1, wherein the second sector comprises at least two sub-sectors, the at least two sub-sectors corresponding to at least two colors of light, and any one of the sub-sectors is capable of reflecting or transmitting the corresponding color of light.
7. The light source device of claim 6, wherein the number of sub-sectors is 3, and 3 sub-sectors correspond to yellow light, green light and red light, respectively.
8. The light source device according to claim 1, wherein the first color light is blue light.
9. The light source device of claim 1, wherein the color filter wheel has an angle of 45 degrees with the light emitting direction of the laser assembly.
10. A laser projection apparatus comprising the light source device according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010197607.9A CN111221211A (en) | 2020-03-19 | 2020-03-19 | Light source device and laser projection apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010197607.9A CN111221211A (en) | 2020-03-19 | 2020-03-19 | Light source device and laser projection apparatus |
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| CN111221211A true CN111221211A (en) | 2020-06-02 |
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| CN202010197607.9A Pending CN111221211A (en) | 2020-03-19 | 2020-03-19 | Light source device and laser projection apparatus |
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Application publication date: 20200602 |