WO2019144544A1 - Système de source de lumière et dispositif de projection - Google Patents

Système de source de lumière et dispositif de projection Download PDF

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Publication number
WO2019144544A1
WO2019144544A1 PCT/CN2018/088509 CN2018088509W WO2019144544A1 WO 2019144544 A1 WO2019144544 A1 WO 2019144544A1 CN 2018088509 W CN2018088509 W CN 2018088509W WO 2019144544 A1 WO2019144544 A1 WO 2019144544A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
color
spectral filter
excitation
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PCT/CN2018/088509
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English (en)
Chinese (zh)
Inventor
郭祖强
张宝英
李屹
Original Assignee
深圳光峰科技股份有限公司
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Publication of WO2019144544A1 publication Critical patent/WO2019144544A1/fr

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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
    • G03B21/16—Cooling; Preventing overheating
    • 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
    • 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

Definitions

  • the present invention relates to the field of projection technologies, and in particular, to a light source system and a projection device.
  • excitation light generated by an excitation light source is generally used to excite the fluorescent color wheel, thereby generating a laser sequence.
  • the red phosphor in the fluorescent color wheel is excited to generate a red fluorescent spectrum having a wide spectral range, resulting in a low color saturation of the red fluorescent light.
  • the laser generated by the fluorescent color wheel is generally filtered by providing a filter on the downstream optical path of the fluorescent color wheel.
  • the filter traps some of the unusable light in the red fluorescence, resulting in a lower luminance of the red light emitted by the light source system, and the projection device does not display well.
  • the present invention provides a light source system and a projection device.
  • a light source system including
  • a supplemental light source for emitting a first color laser
  • a wavelength conversion device comprising at least a conversion region and a transmission region, wherein the wavelength conversion device periodically moves to facilitate rotation of the conversion region and the transmission region on an optical path of the excitation light; the conversion region is in the excitation light a laser is generated under excitation, the conversion region includes a first conversion region, and the received laser light includes a first color fluorescence generated by the first conversion region under excitation of the excitation light, the excitation light passing through Transmitting the transmission area;
  • the guiding device comprises a first spectral filter, a second spectral filter, a third spectral filter and a fourth spectral filter;
  • the second spectral filter comprises a central region and is located around the central region a surrounding area, the first color fluorescence is sequentially reflected by the first spectral filter and the surrounding area to the third spectral filter;
  • the first color laser passes through the central area and is illuminated To the third spectral filter;
  • the third spectral filter reflects the first color fluorescent light and the first color laser light to an light exiting channel; and the excitation light emitted from the transmissive region of the wavelength conversion device passes through After the reflection of the fourth spectral filter, the third spectral filter is incident on the light exiting passage.
  • a light source system includes: an excitation light source, a collecting device, a supplemental light source, a light conversion and light combining device, a light homogenizing device, a first heat sink device, and a second heat sink device;
  • the excitation light source is for emitting excitation light, the optical axis of the excitation light being parallel to the first direction;
  • the collecting device is in the shape of a funnel for collecting and collecting the excitation light, so that the excitation light is emitted from the gathering opening of the collecting device, and enters the light converting and combining device;
  • the supplemental light source is disposed on a side of the gather opening in a second direction, the second direction is substantially perpendicular to the first direction, and the supplemental light source is configured to emit a first color laser, the first color laser Entering the light conversion and light combining device along an optical axis parallel to the first direction;
  • the light conversion and light combining device is generally square in shape, and is arranged downstream of the optical path of the collecting device and the supplementary light source along the first direction, and the width occupied by the second direction is not Exceeding the width of the collecting device and the supplemental light source side by side in the second direction; the light converting and combining device is configured to output the excitation in time series based on the excitation light and the supplemental light Light, converted light of the excitation light, and the supplemental light, and causing an outgoing direction of the output light to be parallel to the second direction;
  • the light homogenizing device extends in a direction parallel to the second direction for receiving the light outputted by the light converting and combining device and performing uniform light;
  • the first heat dissipating device and the excitation light source are arranged side by side in the second direction, and are thermally connected to the excitation light source;
  • the second heat sink and the supplemental light source are arranged side by side in the second direction and are thermally connected to the supplemental light source.
  • a projection apparatus comprising a light source system as described above.
  • the first color laser light emitted by the complementary light source and the laser light received by the light source are used to increase the brightness of the light source system and the projection device applying the light source system to emit red light.
  • FIG. 1 is a schematic diagram showing the structure and internal main optical path of a light source system according to a first embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a wavelength conversion device shown in FIG. 1.
  • FIG. 3 is a schematic structural view of a second spectral filter as shown in FIG. 1.
  • FIG. 4 is a schematic diagram showing the structure and internal main optical path of a light source system according to a second embodiment of the present invention.
  • 5 is a transmittance curve of a central region of the second spectral filter as shown in FIG.
  • Fig. 6 is a transmittance curve of a peripheral region of the second spectral filter shown in Fig. 4.
  • Fig. 7 is a transmittance curve of the fourth spectral filter shown in Fig. 4.
  • Light source system 100 200 Excitation source 112 Supplementary light source 115, 215 First fan 114 Second fan 117 First heat sink 113 Second heat sink 116 Wavelength conversion device 120, 220 First transition zone R
  • Second transition zone G Transmissive zone B First spectroscopic filter 131 Second spectroscopic filter 134,234 Central region 134a Surrounding area 134b Third spectroscopic filter 136,236 Fourth spectroscopic filter 138, 238 Homogenizer 150, 250 Light conversion and light combining device 170 Collecting device 180 First opening 182 Closed mouth 184 Second opening 186 Light exit channel 190
  • the light source system provided by the embodiment of the invention can solve the problem that the brightness of the emitted red light is not high, and can be applied to a projection device, such as a liquid crystal display (LCD) or a digital light path processor (DLP).
  • a projection device such as a liquid crystal display (LCD) or a digital light path processor (DLP).
  • LCD liquid crystal display
  • DLP digital light path processor
  • FIG. 1 is a schematic diagram showing the structure and internal main optical path of a light source system 100 according to a first embodiment of the present invention.
  • FIG. 2 is a schematic structural view of the wavelength conversion device 120 shown in FIG. 1.
  • FIG. 3 is a schematic structural view of the second spectral filter 134 shown in FIG. 1.
  • the light source system 100 includes an excitation light source 112, a supplemental light source 115, a wavelength conversion device 120, and a guiding device.
  • the excitation light source 112 is for emitting excitation light; a part of the excitation light is excited to the wavelength conversion device 120 to generate a laser beam, and the supplementary light source 115 is for emitting a first color laser.
  • the first color is red.
  • the laser light, the unconverted excitation light, and the first color laser light are guided to the light exit passage 190 by the guiding device.
  • the excitation light source 112 may be a blue light source that emits blue excitation light. It can be understood that the excitation light source 112 is not limited to the blue light source, and the excitation light source 112 can also be an ultraviolet light source, a red light source or a green light source. In the present embodiment, the excitation light source 112 includes a blue laser for emitting blue laser light as excitation light. It can be understood that the illuminant 121 can include one, two or more blue laser arrays, and the number of lasers can be selected according to actual needs.
  • the excitation light source 112 may further include a light homogenizing device such as a fly-eye lens or a light-dancing rod to de-cohere the excitation light, thereby reducing the probability of occurrence of the laser speckle phenomenon.
  • a light homogenizing device such as a fly-eye lens or a light-dancing rod to de-cohere the excitation light, thereby reducing the probability of occurrence of the laser speckle phenomenon.
  • the supplemental light source 115 is for emitting a first color laser, including a first color laser, or a first color laser array.
  • the wavelength conversion device 120 includes a conversion region and a transmission region B.
  • the conversion region generates a laser light under excitation of the excitation light.
  • the conversion region includes a first conversion region R provided with a red phosphor and a second conversion region G provided with a green phosphor, and the received laser includes a first color fluorescence and a second conversion region generated by the first conversion region R
  • the second fluorescence produced by G, the first color fluorescence is red fluorescence, and the second color fluorescence is green fluorescence.
  • the excitation light can be emitted through the transmission region B, and the first color fluorescence, the second color fluorescence, and the excitation light emitted from the transmission region B are combined by the guiding device to obtain white light emitted from the light source system 100.
  • a scattering material may be disposed in the transmissive region B for scattering blue excitation light.
  • the conversion region of the wavelength conversion device 120 includes a first conversion region provided with a yellow phosphor, and the second conversion region is omitted.
  • the yellow laser light generated by the first conversion region is combined with the unconverted blue excitation light to obtain white light emitted from the light source system 100, wherein the red fluorescent component in the yellow received laser light is the first color fluorescence.
  • the conversion region may also be provided with wavelength conversion materials of other colors to combine with the excitation light to obtain white light, and the excitation light is not limited to blue.
  • the wavelength conversion device 120 can include a substrate disposed on a surface of the substrate.
  • the wavelength conversion device 120 includes a driving unit disposed at a geometric center of the bottom of the substrate, the driving unit driving the substrate to periodically rotate around the geometric center, thereby facilitating rotation of the conversion region and the transmission region B at the excitation light.
  • the wavelength conversion device 120 periodically emits the first color fluorescence, the second color fluorescence, and the unconverted excitation light.
  • the substrate may be in a strip shape, and the driving unit is disposed at one end of the substrate to drive the wavelength conversion device 120 to perform periodic reciprocating motion.
  • the supplementary light source 115 When the first conversion region R is located on the optical path where the excitation light is located, the supplementary light source 115 turns on and emits the first color laser, and the second conversion region G and the transmission region B are located on the optical path where the excitation light is located.
  • the supplemental light source 115 is turned off to achieve the combination of the first color laser and the first color fluorescence to enhance the brightness of the red light emitted by the light source system 100.
  • the light emitted by the light source system 100 needs to reach a predetermined white balance. Therefore, the ratio of the amount of light between the first color laser and the first color fluorescence, and the ratio of the first conversion region R, the second conversion region G, and the transmission region B of the wavelength conversion device 120 on the surface of the substrate need to be satisfied.
  • the corresponding conditions When the proportion of the first color laser light amount increases, and the ratio of the first color fluorescent light amount decreases, the ratio of the angle of the first conversion region R to the wavelength conversion device 120 can be reduced, and when the first color laser light amount is reduced, When the ratio of the amount of fluorescent light of the first color is increased, the ratio of the angle of the first conversion region R to the wavelength conversion device 120 can be increased to satisfy the requirement.
  • the arrangement of the supplemental light source 115 is advantageous for reducing the angle occupied by the first conversion region R on the wavelength conversion device 120, so that the angle occupied by the second conversion region G and the transmission region B can be increased, thereby improving the brightness of the light source system 100 as a whole. .
  • the guiding device includes a first beam splitting filter 131, a second beam splitting filter 134, a third beam splitting filter 136, and a fourth beam splitting filter 138.
  • the second spectral filter 134 includes a central region 134a and a peripheral region 134b located around the central region 134a.
  • the first color fluorescence is sequentially reflected by the first spectral filter 131 and the surrounding region 134b to the third spectral filter 136; the first color laser passes through the central region 134a and is irradiated to the third spectral filter 136.
  • the first color fluorescence and the first color laser are optically expanded and combined by the second spectral filter 134, and then reflected by the third spectral filter 136; the wavelength conversion device 120 transmits the region B.
  • the emitted excitation light is reflected by the fourth spectral filter 138 and then exits through the third spectral filter 136.
  • the first spectral filter 131 is used to reflect the laser light emitted from the wavelength conversion device 120 to the second spectral filter 134.
  • the first spectral filter 131 may be a total reflection mirror or an optical glass provided with a reflective film.
  • the first spectroscopic filter 131 may be plated with an optical film that reflects a laser beam of a specific wavelength range, such as a first color fluorescence and a second color fluorescence that reflect a specific wavelength range, and the first color is intercepted. a color fluorescence and a part of the light in the second color fluorescence and the unconverted excitation light to perform color correction on the laser light.
  • the first light spectrum filter 131 can also transmit the excitation light to avoid The unconverted excitation light emerging from the conversion region enters the subsequent guiding element.
  • the second spectral filter 134 includes a central region 134a and a surrounding region 134b.
  • the central region 134a is plated with an anti-reflection film for transmitting the first color laser and the laser light.
  • the surrounding area 134b is plated with a reflective film for reflecting the received laser light.
  • the central area 134a is located at the geometric center of the second spectral filter 134, and the surrounding area 134b is located at the edge of the central area 134a.
  • the positions of the central region 134a and the surrounding region 134b correspond to the incident positions of the first color laser light and the laser light receiving region.
  • the central region 134a may not be disposed at the geometric center position of the second spectral filter 134.
  • the central region 134a is configured to transmit light in a wavelength range corresponding to the first color laser, and reflect light outside the wavelength range of the first color laser to reduce the loss of the laser.
  • the surrounding area 134b is configured to reflect the first color fluorescence and the second color fluorescence in a specific wavelength range, and transmit a part of the first color fluorescence and the second color fluorescence to the first color fluorescence and the The second color of fluorescence is used for color correction.
  • the fourth spectral filter 138 is used to reflect the received laser light emitted from the transmission region B of the wavelength conversion device 120, and may be a total reflection mirror.
  • the third spectral filter 136 is configured to reflect the received laser light and transmit the excitation light.
  • the third spectral filter 136 is an anti-yellow blue dichroic filter.
  • a plurality of divergence angle relay lenses for adjusting light are disposed between the spectral filters in the guiding device.
  • the plurality of relay lenses are convex lenses. It is to be understood that, in an embodiment, other relay devices may be disposed between the spectroscopic filters in the guiding device, and are not limited thereto.
  • the guiding device further includes a collecting lens disposed between the wavelength converting device 120 and the first spectral filter 131, the collecting lens is configured to concentrate the excitation light incident on the surface of the wavelength conversion device 120, and adjust the wavelength conversion device 120.
  • the divergence angle of the outgoing light may also be a collecting lens group including a plurality of lenses whose optical axes coincide.
  • the light source system 100 further includes a light homogenizing device 150 disposed in the light exiting channel 190.
  • the light emitted by the third spectral filtering filter 136 is dimmed by the light homogenizing device 150 and then emitted from the light source system 100.
  • the light homogenizing device 150 may be a fly-eye lens. Or a light stick or the like.
  • the light source system 100 includes an excitation light source 112, a collecting device 180, a supplemental light source 115, a light conversion and light combining device 170, and a light homogenizing device. 150.
  • the excitation light source 112 is configured to emit excitation light, the optical axis of the excitation light is parallel to the first direction, and the collecting device 180 is funnel-shaped for collecting and collecting the excitation light, so that the excitation light is collected from the collecting device 180.
  • the closing port 184 exits and enters the light conversion and light combining device 170;
  • the supplementary light source 115 is disposed along the second direction on the side of the gathering opening 184, the second direction is substantially perpendicular to the first direction, and the supplementary light source 115 is used for Generating a first color laser that enters the light conversion and light combining device 170 along an optical axis parallel to the first direction;
  • the light conversion and light combining device 170 is generally square in shape along the first One direction is arranged downstream of the optical path of the collecting device 180 and the supplemental light source 115, and the width occupied by the second direction does not exceed the width occupied by the collecting device 180 and the supplemental light source 115 in the second direction;
  • the conversion and light combining device 170 is configured to output the excitation light, the converted light of the excitation light, and the first color laser in time series based on the excitation light and the first color laser, and output the Light out Parallel to the second direction;
  • the light homogenizing device 150 extend
  • the collecting device 180 includes a funnel-shaped first sidewall and at least one converging lens disposed in the first sidewall, and the converging lens is disposed in the gradually narrowing first sidewall.
  • the inner side of the gradually narrowing first side wall has a reflection effect on the excitation light, and has a folding effect on the light emitted from the laser array in the excitation light source 112.
  • collection device 180 can include other optical components, components or systems capable of collecting the excitation light.
  • the first side wall of the collecting device 180 includes a closing opening 184 and a first opening 182 disposed opposite the closing opening 184.
  • the aperture of the first opening 182 is larger than the gathering opening 184, and the end of the gathering opening 184 is connected to the light converting and combining device 170.
  • the light emitting surface of the excitation light source 112 is disposed corresponding to the first opening 182, so that the excitation light is along the light.
  • the shaft is incident on the collection device 180 parallel to the first direction.
  • the light conversion and light combining device 170 includes a substantially square second sidewall and a wavelength conversion device 120 disposed in the second sidewall and the guiding device.
  • the converted light of the excitation light is a received laser light emitted from the wavelength conversion device 120.
  • the first spectral filter 131, the second spectral filter 134, the third spectral filter 136, and the fourth spectral filter 138 of the guiding device are respectively disposed inside the second sidewall.
  • the wavelength conversion device 120 is disposed between the first spectral filter 131 and the fourth spectral filter 138 such that the light output and the output direction of the light output by the light combining device 170 are parallel to the second direction, and
  • the components of the light conversion and light combining device 170 are compactly arranged. It can be understood that the internal components of the light conversion and light combining device 170 can also adopt other arrangements that can make the second sidewall occupy a small space, and are not limited thereto.
  • the second side wall is disposed at a position adjacent to the gathering opening 184, and the supplementary light source 115 is disposed corresponding to the second opening 186.
  • the first color laser enters the light conversion along the optical axis parallel to the first direction.
  • Light combining device 170 Light combining device 170.
  • the end of the second heat sink 116 away from the supplemental light source 115 in the second direction and the end of the first heat sink 113 away from the excitation light source 112 in the second direction are substantially side by side in the parallel direction of the first direction.
  • the heat from the excitation light source 112 is transmitted along the first heat sink 113, and is radiated into the air through the surface area of the first heat sink 113; likewise, the heat on the supplemental light source 115 is dissipated through the second heat sink 116.
  • the light homogenizing device 150 is disposed inside the light exiting channel 190, and the light homogenizing device 150 and the light exiting channel 190 each extend in a direction parallel to the second direction.
  • the light homogenizing device 150 is away from the end of the light converting and combining device 170 in the second direction and the end of the first heat dissipating device 113 away from the excitation light source 112 in the second direction, substantially in the parallel direction of the first direction side by side.
  • the excitation light source 112 is relatively large in power, the power of the supplemental light source 115 is relatively small, such that the volume of the supplemental light source 115 relative to the excitation light source 112 is small, and the supplemental light source 115 is disposed beside the gathering opening 184, supplementing the first color emitted by the light source 115.
  • the direction in which the laser light is emitted is substantially parallel to the direction in which the excitation light emitted from the excitation light source 112 is emitted, and the complementary light source 115 effectively utilizes the space released by the gathering opening 184, so that the space is arranged closely.
  • the excitation source 112 is substantially flush with the supplemental source 115.
  • the width of the light conversion and light combining device 170 in the second direction does not exceed the width occupied by the collecting device 170 and the supplemental light source 115 in the second direction; in the second direction, the first heat sink 113 is far away
  • One end of the excitation light source 112, one end of the second heat sink 116 away from the supplemental light source 115, and one end of the light homogenizing device 150 away from the light conversion and light combining device 170 are substantially side by side in the parallel direction of the first direction, and the space arrangement is compact. .
  • the excitation light source 112 and the first heat dissipation device 113 are substantially parallel to one end of the light-dissipating channel 190, and the excitation light source 112 and the supplementary light source 115 are arranged alternately.
  • the light source system 100 is substantially square and has a compact structure.
  • the light source system 100 further includes a first fan 114 and a second fan 117 to apply airflow to the first heat sink 113 and the second heat sink 116, respectively, to remove heat.
  • the first heat sink 113, the first fan 114, the second heat sink 116, and the second fan 117 are sequentially arranged in the parallel direction of the first direction. It can be understood that the first heat sink 113, the first fan 114, the second heat sink 116, and the second fan 117 can be disposed on the excitation light source 112, the collection device 180, the light conversion and light combining device 170, and the light exiting channel 190. Other arrangements in the side space.
  • the excitation light source 112 and the first heat dissipation device are respectively located at two sides of the first fan 114, and the supplementary light source 115 and the second heat dissipation device 116 are respectively disposed at two sides of the second fan 117.
  • the heat dissipating device can selectively omit or add a specific heat dissipating component, and is not limited thereto.
  • the first fan 114 and the second fan 117 are used to draw air or blow air in the same direction to form a directional airflow to dissipate heat to the first heat sink 113 and the second heat sink 116.
  • the first color laser light emitted by the supplemental light source 115 is combined with the laser light, and is used to increase the brightness of the light source system 100 and the projection device that applies the light source system 100 to emit red light.
  • the excitation light source 112, the supplemental light source 115, and the guiding device and the optical channel are arranged in a compact space, which is advantageous for the miniaturization design of the light source system 100 and the projection device.
  • FIG. 4 is a schematic diagram of the structure and internal main optical path of the light source system 200 according to the second embodiment of the present invention.
  • the main difference between the light source system 200 provided in the present embodiment and the light source system 100 provided in the first embodiment is that the first conversion region of the wavelength conversion device 220 in the light source system 200 is provided with a yellow phosphor and generates a yellow color.
  • the laser light includes a first color fluorescence and a second color fluorescence, the first color fluorescence is red fluorescence, and the second color fluorescence is green fluorescence.
  • the yellow laser light is incident on the second spectral filter 236 after the second spectral filter 234 is optically expanded by the first color laser.
  • the second color fluorescence generated by the second conversion region G of the wavelength conversion device 220 passes through the wavelength conversion device 220, is reflected by the fourth spectral filter 238, and is incident on the third spectral filter 236.
  • the third spectral filter 236 transmits the first color fluorescent light, and reflects the second color fluorescent light and the excitation light.
  • the supplementary light source 215 is turned on, and when the second conversion region G and the transmission region B are located on the optical path of the excitation light, the supplementary light source 215 is turned off.
  • the first color laser is combined with the first color fluorescence to enhance the brightness of the red light emitted by the light source system 100.
  • FIG. 5 is a transmittance curve of a central region of the second spectral filter 234 shown in FIG.
  • the central region is for transmitting the first color laser, the first color of the yellow laser, and the second color.
  • the central region transmits light in a first predetermined wavelength range
  • the first color laser wavelength range is located in the first predetermined wavelength range to ensure that the first color laser can pass through the second
  • the spectral filter 234 is combined with the laser light to increase the brightness of the red light emitted by the light source system 100.
  • the wavelength range of the first color fluorescence is wider, and the first predetermined wavelength range is located in the wavelength range of the first color fluorescence, and the central area is capable of trapping part of the light in the first color fluorescence to improve The saturation of the red light is emitted.
  • the central region also transmits the second color of fluorescence.
  • FIG. 6 is a transmittance curve of the surrounding area of the second spectral filter 234 shown in FIG.
  • the surrounding area is for reflecting the first color laser, the first color fluorescence, and transmitting the second color fluorescence.
  • the central region and the surrounding region of the second spectral filter 234 both transmit the second color fluorescence, so that the second color fluorescence of the yellow received laser light cannot enter the light homogenizing device 250, and only the yellow laser is used.
  • the first color of the fluorescent portion is a transmittance curve of the surrounding area of the second spectral filter 234 shown in FIG.
  • the surrounding area is for reflecting the first color laser, the first color fluorescence, and transmitting the second color fluorescence.
  • the central region and the surrounding region of the second spectral filter 234 both transmit the second color fluorescence, so that the second color fluorescence of the yellow received laser light cannot enter the light homogenizing device 250, and only the yellow laser is used.
  • the first color of the fluorescent portion is a transmittance curve
  • the surrounding area has a color modifying function for the first color fluorescence, the surrounding area reflects light in a second predetermined wavelength range, and a wavelength range of the first color laser is located in the second preset In the wavelength range, the second predetermined wavelength range is located in the first color fluorescence wavelength range to intercept part of the light in the first color fluorescence, and reflect a portion of the first color fluorescence that can be utilized.
  • FIG. 7 is a transmittance curve of the fourth spectral filter 238 as shown in FIG. 4 .
  • the fourth spectral filter 238 has a color correction function for the second color fluorescence, and the fourth spectral filter 238 is configured to reflect the second color fluorescence in the third predetermined wavelength range.
  • the three predetermined wavelength ranges fall within the second color fluorescence wavelength range. That is, the fourth spectroscopic filter 238 reflects a part of the light in the second color fluorescence, and transmits the band component that cannot be utilized in the second color fluorescence to improve the light source system 200 and the projection device of the application light source system 200 to emit green light. Saturation.
  • the light source system 200 provided in the present embodiment can perform color correction on the emitted red light and the green light, thereby improving the quality of the projected image of the projection device.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
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  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention porte sur un système de source de lumière et sur un dispositif de projection. Le système de source de lumière comprend une source de lumière d'excitation, une source de lumière supplémentaire, un appareil de conversion de longueur d'onde et un appareil de guidage, l'appareil de guidage comprenant un premier filtre de division de faisceau, un second filtre de division de faisceau, un troisième filtre de division de faisceau et un quatrième filtre de division de faisceau ; le second filtre de division de faisceau comprend une région centrale et une région périphérique située autour de la région centrale ; une lumière fluorescente d'une première couleur est générée par l'appareil de conversion de longueur d'onde grâce à l'excitation de la lumière d'excitation et passe successivement à travers le premier filtre de division de faisceau ainsi qu'à travers la région périphérique, puis elle est réfléchie vers le troisième filtre de division de faisceau ; un laser d'une première couleur est émis par la source de lumière supplémentaire et passe à travers la région centrale, puis irradie le troisième filtre de division de faisceau ; le troisième filtre de division de faisceau réfléchit la lumière fluorescente d'une première couleur et le laser d'une première couleur vers un canal de sortie de lumière ; et le laser émis à partir d'une région de transmission de l'appareil de conversion de longueur d'onde est réfléchi par le quatrième filtre de division de faisceau, puis il entre dans le canal de sortie de lumière par l'intermédiaire du troisième filtre de division de faisceau.
PCT/CN2018/088509 2018-01-27 2018-05-25 Système de source de lumière et dispositif de projection WO2019144544A1 (fr)

Applications Claiming Priority (2)

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CN201810080137.0A CN110095928B (zh) 2018-01-27 2018-01-27 光源系统及投影设备
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