WO2019179209A1 - Source de lumière de projection et système de projection associé - Google Patents

Source de lumière de projection et système de projection associé Download PDF

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Publication number
WO2019179209A1
WO2019179209A1 PCT/CN2019/070264 CN2019070264W WO2019179209A1 WO 2019179209 A1 WO2019179209 A1 WO 2019179209A1 CN 2019070264 W CN2019070264 W CN 2019070264W WO 2019179209 A1 WO2019179209 A1 WO 2019179209A1
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WO
WIPO (PCT)
Prior art keywords
light source
mirror
beam splitter
reference line
color wheel
Prior art date
Application number
PCT/CN2019/070264
Other languages
English (en)
Chinese (zh)
Inventor
高志强
杨伟樑
赖泓基
林清云
Original Assignee
广景视睿科技（深圳）有限公司
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Application filed by 广景视睿科技（深圳）有限公司 filed Critical 广景视睿科技（深圳）有限公司
Publication of WO2019179209A1 publication Critical patent/WO2019179209A1/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
    • G03B21/20—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
    • 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
    • G03B21/2013—Plural light sources
    • 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
    • G03B21/206—Control of light source other than position or intensity
    • 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
    • G03B21/2066—Reflectors in illumination beam

Definitions

  • Embodiments of the present invention relate to the field of projection display technologies, and in particular, to a projection light source and a projection system thereof.
  • a laser is a high-intensity, directional, light source that emits a monochromatic coherent beam.
  • laser has been gradually used as a projection light source in the field of projection display technology.
  • the projection system using laser as a projection light source has a long service life, rich colors and high brightness.
  • the projection light source of the projection system mostly adopts a blue laser to excite the phosphor, wherein the blue light is directly provided by the blue laser, and the green light is excited by the blue laser to generate the green fluorescent green phosphor through the green filter segment. After filtering out, the yellow fluorescence generated by the blue laser excited by the blue laser is filtered through the red filter section. In this method, since the red light is filtered by the yellow fluorescent light, the color purity of the red light is not high, and the color gamut of the projection light source is not high.
  • Embodiments of the present invention are directed to a projection light source and a projection system thereof, which can enhance the color gamut of a projection light source without affecting the brightness of the projection light source, and at the same time, make the projection light source compact in structure, and the volume is not increased by the red laser light source. And it has increased dramatically.
  • a technical solution adopted by the embodiment of the present invention is to provide a projection light source, including:
  • a blue laser light source a red laser light source, a rotating fluorescent color wheel, a collecting lens, a first beam splitter, and a red laser mirror;
  • the working surface of the rotating fluorescent color wheel is provided with an annular fluorescent layer and an annular reflective diffusion layer, and the annular fluorescent layer and the annular reflective diffusion layer are disposed adjacent to each other;
  • the blue laser light source, the red laser light source, the condensing lens, the first beam splitter, and the red laser mirror are all disposed on a side of the working surface of the rotating fluorescent color wheel, and
  • the annular fluorescent layer of the rotating fluorescent color wheel, the collecting lens, the first beam splitter and the blue laser light source are located at a first reference line,
  • the red laser mirror and the first beam splitter are located on a second reference line
  • the red laser source is disposed off-axis such that the red laser beam emitted by the red laser source forms a first off-axis angle a with the first reference line.
  • first reference line and the second reference line are perpendicular to each other;
  • the first off-axis angle a satisfies a formula Where d is the distance from the center loop line of the annular reflective diffusion layer to the first reference line, and f is the focal length of the concentrating lens.
  • the angle between the first beam splitter and the first reference line is 45°;
  • the red laser mirror is disposed on a side of the first beam splitter away from the rotating fluorescent color wheel;
  • the annular fluorescent layer comprises: a blue laser transmitting region, a yellow phosphor region, and a green phosphor region;
  • the projection light source further includes: a first mirror, a second mirror, and a second beam splitter;
  • the second beam splitter is disposed on one side of a working surface of the rotating fluorescent color wheel
  • the first mirror and the second mirror are disposed on the other side of the working surface of the rotating fluorescent color wheel, and
  • the first mirror, the annular fluorescent layer of the rotating fluorescent color wheel, the collecting lens, the first beam splitter and the blue laser light source are located at a first reference line,
  • the red laser mirror, the first beam splitter and the second beam splitter are located on a second reference line
  • the second beam splitter and the second mirror are located on a third reference line
  • the second mirror and the first mirror are located at a fourth reference line.
  • first reference line, the second reference line, the third reference line, and the fourth reference line are rectangular;
  • the second mirror and the second beam splitter are parallel to the first beam splitter, and the second mirror, the first beam splitter and the second beam splitter are both perpendicular to the first mirror.
  • the annular fluorescent layer comprises: a blue laser reflective region, a yellow phosphor region, and a green phosphor region;
  • the projection light source further includes: a blue laser mirror;
  • the blue laser light source is disposed off-axis such that the blue laser beam emitted by the blue laser source forms a second off-axis angle c with the first reference line.
  • the second off-axis angle c satisfies a formula Wherein d 2 is a distance from an edge of the annular fluorescent layer to the first reference line, and f is a focal length of the collecting lens.
  • the annular fluorescent layer comprises: a blue laser reflective scattering region, a yellow phosphor region, and a green phosphor region;
  • the first beam splitter includes: a first reflective segment, a second reflective segment, and a transmissive segment;
  • the transmissive section is disposed between the first reflective segment and the second reflective segment;
  • the transmissive section is for transmitting blue and red light and reflecting other color beams.
  • the length of the transmissive section is not less than the blue spot diameter, and the smaller the length of the transmissive section, the smaller the blue loss.
  • the projection light source further includes:
  • the working surface of the rotating filter color wheel is provided with an annular filter layer, and the annular filter layer of the rotating filter color wheel is located at the second reference line.
  • a projection system including:
  • a display chip, a projection lens, and the projection light source described above are examples of the projection light source described above.
  • the embodiment of the present invention provides a projection light source and a projection system thereof, the projection light source includes: a blue laser light source, a red laser light source, and a rotating fluorescent color. a wheel, a concentrating lens, a first beam splitter, and a red laser mirror.
  • the working surface of the rotating fluorescent color wheel is provided with an annular fluorescent layer and a circular reflective diffusion layer, and the annular fluorescent layer and the annular reflective diffusion layer are disposed adjacent to each other; wherein, the blue The laser light source, the red laser light source, the collecting lens, the first beam splitter and the red laser mirror are all disposed on the working surface side of the rotating fluorescent color wheel, and the circular fluorescent layer of the rotating fluorescent color wheel, the collecting lens, the first The beam splitter and the blue laser source are located on the first reference line, the red laser mirror and the first beam splitter are located on the second reference line, and the red laser source is off-axis, so that the red laser beam emitted by the red laser source and the first reference The line forms a first off-axis angle a.
  • the above embodiment improves the color purity of the red light by adding a red laser light source instead of filtering the yellow light in the projection light source, improves the color gamut of the projection light source, and does not affect the brightness of the projection light source, thereby ensuring the brightness of the projection light source and Color gamut; at the same time, by setting a circular reflection diffusion layer in the projection light source, and setting the red laser light source off-axis, so that the red laser light source can be disposed on the same side as the blue laser light source, and the rotating fluorescent color wheel and the blue laser can be reasonably utilized.
  • the space between the light sources makes the projection light source compact and the volume is not greatly increased by the addition of the red laser source.
  • FIG. 1 is a schematic structural view of a projection light source according to Embodiment 1 of the present invention.
  • FIG. 2 is a light path diagram of a projection light source according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural view of a rotating fluorescent color wheel according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic structural diagram of a projection light source according to Embodiment 2 of the present invention.
  • FIG. 5 is a light path diagram of a projection light source according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural view of a rotating fluorescent color wheel according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic structural diagram of a projection light source according to Embodiment 3 of the present invention.
  • FIG. 8 is an optical path diagram of a projection light source according to Embodiment 3 of the present invention.
  • FIG. 9 is a schematic structural view of a rotating fluorescent color wheel according to Embodiment 3 of the present invention.
  • FIG. 1 to FIG. 9 where 1 is a projection light source, 11 is a blue laser light source, 12 is a red laser light source, 21 is a rotating fluorescent color wheel, 211 is a ring reflection diffusion layer, 212 is a circular fluorescent layer, and 2121 is a green fluorescent color.
  • 2122 is a yellow phosphor area
  • 2123 is a blue laser transmission area
  • 2124 is a blue laser reflection area
  • 2125 is a blue laser reflection scattering area
  • 213 is a first driving device
  • 22 is a rotating filter color wheel.
  • 221 is an annular filter layer
  • 222 is a second driving device
  • 31 is a collecting lens
  • 41 is a first beam splitter
  • 411 is a first reflecting section
  • 412 is a second reflecting section
  • 413 is a transmitting section
  • 42 is a second
  • 51 is a red laser mirror
  • 52 is a first mirror
  • 53 is a second mirror
  • 54 is a blue laser mirror.
  • the projection light source 1 is applied to a projection system, and includes: a blue laser light source 11, a red laser light source 12, a rotating fluorescent color wheel 21, and a rotary filter. a color wheel 22, a collecting lens 31, a first beam splitter 41, a second beam splitter 42, a red laser mirror 51, a first mirror 52, and a second mirror 53, and the blue laser source 11, Red laser light source 12, rotating fluorescent color wheel 21, rotating filter color wheel 22, collecting lens 31, first beam splitter 41, second beam splitter 42, red laser mirror 51, first mirror 52 and second reflection
  • the mirrors 53 are all disposed on the same horizontal plane.
  • the blue laser light source 11 is configured to emit a blue laser beam, and includes a plurality of blue laser light emitting chips (not shown), a first light combining device (not shown), and a first collimating lens group (not shown) Show).
  • each blue laser light emitting chip is configured to emit a corresponding blue laser light to the first light combining device
  • the first light combining device is configured to receive the corresponding blue laser light and direct the plurality of blue laser light toward the first collimating lens
  • the group exits, and the first collimating lens group is used to emit the received plurality of blue laser beams in the same direction to form a parallel blue laser beam.
  • the first light combining device described above includes a plurality of blue light mirrors.
  • Each of the blue mirrors is disposed in front of a corresponding blue laser light emitting chip, and each of the blue light beams is configured to emit the blue laser light emitted from the corresponding blue laser light emitting chip toward the first collimating lens group.
  • the blue laser source 11 can also be a blue laser light emitting chip.
  • the red laser source 12 is used to emit a red laser beam, and includes a plurality of red laser light emitting chips (not shown), a second light combining device (not shown), and a second collimating lens group (not shown).
  • each red laser light emitting chip is configured to emit a corresponding red laser light to the second light combining device
  • the second light combining device is configured to receive the corresponding red laser light and emit the plurality of red laser light toward the second collimating lens group
  • the two collimating lens groups are used to emit the received plurality of red laser beams in the same direction to form a parallel red laser beam.
  • the second light combining device includes a plurality of red light reflecting mirrors.
  • each of the red light reflectors is disposed in front of a corresponding red laser light emitting chip, and each of the red light mirrors is configured to emit the red laser light emitted from the corresponding red laser light emitting chip toward the first collimating lens group.
  • the red laser source 12 can also be a red laser light emitting chip.
  • the rotating fluorescent color wheel 21 includes an annular reflective diffusion layer 211 , an annular fluorescent layer 212 , and a first driving device 213 .
  • the annular reflective diffusion layer 211 and the annular fluorescent layer 212 are coaxially disposed on the working surface P1 of the rotating fluorescent color wheel 21, and the inner diameter of the annular reflective diffusion layer 211 is consistent with the outer diameter of the annular fluorescent layer 212, that is, the annular reflective diffusion layer 211 and The annular fluorescent layer 212 is disposed adjacent to each other and the annular reflective diffusion layer 211 is located on the outer ring side of the working surface P1 of the rotating fluorescent color wheel 21, and the annular fluorescent layer 212 is located on the inner ring side of the working surface P1 of the rotating fluorescent color wheel 21.
  • the inner diameter of the annular reflective diffusion layer 211 may also be larger than the outer diameter of the annular fluorescent layer 212, that is, there is a gap between the annular reflective diffusion layer 211 and the annular fluorescent layer 212.
  • the working surface P1 of the rotating fluorescent color wheel 21 faces the blue laser light source 11 and the red laser light source 12 for receiving the surfaces of the blue laser beam and the red laser beam.
  • the annular reflective diffusion layer 211 is configured to receive the red laser beam emitted by the red laser source 12 and diffusely reflect the received red laser beam to eliminate speckle of the red laser beam.
  • the annular fluorescent layer 212 is then used to receive the blue laser beam emitted by the blue laser source 11.
  • the annular fluorescent layer 212 includes a green phosphor region 2121, a yellow phosphor region 2122, and a blue laser transmissive region 2123, the green phosphor region 2121, the yellow phosphor region 2122, and the blue laser transmission.
  • the region 2123 is circumferentially disposed along the annular fluorescent layer 212, and the regions of the green phosphor region 2121, the yellow phosphor region 2122, and the blue laser transmitting region 2123 are the same.
  • the area of the green phosphor region 2121, the yellow phosphor region 2122, and the blue laser transmissive region 2123 may be unequally set according to actual needs.
  • the green phosphor region 2121 When the blue laser beam is incident on the green phosphor region 2121 of the annular fluorescent layer 212, the green phosphor region 2121 absorbs the blue laser beam and is stimulated to reflect green fluorescence;
  • the yellow phosphor region 2122 absorbs the blue laser beam and is stimulated to reflect yellow fluorescence
  • the blue laser transmitting region 2123 transmits the blue laser beam.
  • the first driving device 213 is configured to drive the rotation of the rotating fluorescent color wheel 21, which is disposed on the other surface of the working surface P1 of the rotating fluorescent color wheel 21, preferably, the first driving device 213 is disposed at the middle of the surface, so that The first driving device 213 can smoothly drive the rotating fluorescent color wheel 21 to rotate.
  • the first driving device 213 can be a motor or the like.
  • the rotary filter color wheel 22 includes an annular filter layer 221 and a second driving device 222.
  • the annular filter layer 221 is disposed on the working surface P2 of the rotating filter color wheel 22, and is disposed coaxially with the rotating filter color wheel 22, and the area thereof is smaller than the area of the working surface P2 of the rotating filter color wheel 22.
  • the annular filter layer 221 is for receiving a red laser beam, a blue laser beam, yellow fluorescence, and green fluorescence.
  • the working surface P2 of the rotating filter color wheel 22 is a surface for receiving a blue laser beam, a red laser beam, a yellow fluorescent wave, and a green fluorescent light.
  • the annular filter layer 221 includes a red filter segment (not shown), a blue filter segment (not shown), and a green filter segment (not shown), the red filter segment, the blue filter.
  • the light segment and the green filter segment are circumferentially disposed along the annular filter layer 221, and the area of the red filter segment, the blue filter segment, and the green filter segment is the green phosphor region 2121 and the yellow phosphor region 2122. It corresponds to the area of the area of the blue laser transmission region 2123.
  • the red filter segment transmits the red laser beam and is capable of filtering the yellow fluorescent yellow band to transmit Red light in which the green fluorescent, blue laser beam, and yellow fluorescent yellow light band are filtered out;
  • the blue filter segment of the annular filter layer 221 When the blue laser beam, the red laser beam, the yellow fluorescence, and the green fluorescence are incident on the blue filter segment of the annular filter layer 221, the blue filter segment transmits a blue laser beam, wherein the green fluorescent, red color laser The beam and yellow fluorescence are filtered out;
  • the green filter segment When the blue laser beam, the red laser beam, the yellow fluorescence, and the green fluorescence are incident on the green filter segment of the annular filter layer 221, the green filter segment transmits green fluorescence, wherein the blue laser beam, the red color laser beam, and The yellow fluorescence is filtered out.
  • the second driving device 222 is configured to drive the rotating filter color wheel 22 to rotate, and is disposed on the other surface of the working surface P2 of the opposite rotating filter color wheel 22. Preferably, the second driving device 222 is disposed at a middle portion of the surface. In order to enable the second driving device 222 to smoothly drive the rotary filter color wheel 22 to rotate.
  • the second driving device 222 can be a motor or the like.
  • the second driving device 222 rotates synchronously with the first driving device 213 to correspond to the green phosphor region 2121 of the rotating fluorescent color wheel 21 and the green filter segment of the rotating filter color wheel 22, so that the green phosphor region is
  • the green fluorescence reflected by the 2121 can pass through the green filter segment;
  • the yellow phosphor region 2122 of the rotating fluorescent color wheel 21 corresponds to the red filter segment of the rotating filter color wheel 22, so that the yellow fluorescent light reflected from the yellow phosphor region 2122
  • the blue laser transmission region 2123 of the rotating fluorescent color wheel 21 can correspond to the blue color filter segment of the rotary filter color wheel 22 so that the blue laser beam transmitted from the blue laser transmission region 2123 can pass. Blue filter section.
  • the collecting lens 31 may be a lenticular lens for collecting light.
  • the first beam splitter 41 and the second beam splitter 42 are planar half-reflex lens structures.
  • the first beam splitter 41 is capable of transmitting the blue laser beam and the red laser beam, and reflects the green fluorescence and the yellow fluorescence;
  • the second beam splitter 42 is capable of reflecting the blue laser beam, transmitting the red laser beam, the yellow fluorescence, and the green fluorescence.
  • the red laser mirror 51, the first mirror 52, and the second mirror 53 are plane mirrors.
  • the red laser mirror 51 is used to reflect the red laser beam
  • the first mirror 52 and the second mirror 53 are used to reflect the blue laser beam.
  • the red laser mirror 51, the first mirror 52, and the second mirror 53 may also be curved mirrors or curved mirrors and the like.
  • the blue laser light source 11, the red laser light source 12, the collecting lens 31, the first beam splitter 41, the second beam splitter 42 and the red laser mirror 51 are all disposed on the working surface P1 side of the rotating fluorescent color wheel 21.
  • the first mirror 52 and the second mirror 53 are both disposed on the other side of the working surface P1 of the rotating fluorescent color wheel 21 (the side away from the working surface P1), and
  • the first mirror 52, the annular fluorescent layer 212 of the rotating fluorescent color wheel 21, the collecting lens 31, the first beam splitter 41, and the blue laser light source 11 are sequentially located on the first reference line S1, that is, the first mirror 52,
  • the central axis of the annular fluorescent layer 212, the collecting lens 31, the first dichroic mirror 41, and the blue laser light source 11 of the rotating fluorescent color wheel 21 coincides with the first reference line S1;
  • the annular filter layer 221 of the red laser mirror 51, the first beam splitter 41, the second beam splitter 42 and the rotating filter color wheel 22 is sequentially located on the second reference line S2, that is, the red laser mirror 51 and the first beam splitter.
  • a central axis of the annular filter layer 221 of the mirror 41, the second dichroic mirror 42 and the rotating filter color wheel 22 coincides with the second reference line S2;
  • the second beam splitter 42 and the second mirror 53 are sequentially located on the third reference line S3, that is, the central axes of the second beam splitter 42 and the second mirror 53 coincide with the third reference line S3;
  • the second mirror 53 and the first mirror 52 are sequentially located on the fourth reference line S4, that is, the central axes of the second mirror 53 and the first mirror 52 are coincident with the fourth reference line S4;
  • the red laser source 12 is disposed off-axis such that the red laser beam emitted therefrom forms a first off-axis angle a with the first reference line S1, and the first off-axis angle a satisfies the formula.
  • d is the distance from the center loop of the annular reflective diffusion layer 211 to the first reference line S1
  • f is the focal length of the collecting lens 31.
  • the red laser source 12 is disposed off-axis and the annular reflective diffusion layer 211 is disposed to reflect the red laser beam emitted by the red laser source 12, so that the red laser source can be disposed on the same side as the blue laser source, and the rotating fluorescent color wheel is utilized reasonably.
  • the space between the blue laser sources makes the projection light source compact and the volume is not greatly increased by the addition of the red laser source.
  • the first reference line S1, the second reference line S2, the third reference line S3, and the fourth reference line S4 are located in the same plane and are perpendicular to each other and have a rectangular shape.
  • the first beam splitter 41 is located between the working surface P1 of the rotating fluorescent color wheel 21 and the blue laser light source 11, the working surface P1 of the rotating fluorescent color wheel 21 is perpendicular to the first reference line S1, and the blue laser light source 11
  • the emitted blue laser beam coincides with the first reference line S1
  • the first beam splitter 41 has an angle of 45° with the first reference line S1, so that the first surface P3 of the first beam splitter 41 faces the rotating fluorescent color wheel.
  • the working surface P1 of 21 faces the blue laser light source 11 for transmitting the blue laser beam emitted from the blue laser light source 11 to the annular fluorescent layer 212 of the rotating fluorescent color wheel 21.
  • the collecting lens 31 is located between the working surface P1 of the rotating fluorescent color wheel 21 and the first surface P3 of the first beam splitter 41, which is perpendicular to the first reference line S1 for the operation of the incident fluorescent color wheel 21.
  • the light beam of the surface P1 and the light beam emitted from the working surface P1 of the rotating fluorescent color wheel 21 are condensed so that the light beams can be accurately concentrated to the target position;
  • the first mirror 52 is located on the other side of the working surface P1 of the rotating fluorescent color wheel 21 and is perpendicular to the first beam splitter 41, that is, the reflecting surface of the first mirror 52 faces the rotating fluorescent color wheel 21. For reflecting the blue laser beam transmitted by the blue laser transmitting region 2123 of the rotating fluorescent color wheel 21 to change the direction of the blue laser beam;
  • the reflecting surface of the second mirror 53 faces the reflecting surface of the first mirror 52, and the second mirror 53 is parallel to the first beam splitter 41, perpendicular to the first mirror 52, which is used to reflect the first
  • the blue laser beam reflected by the mirror 52 changes the direction of the blue laser beam again;
  • the second beam splitter 42 is parallel to the first beam splitter 41 and the second mirror 53, perpendicular to the first mirror 52, and its side faces the reflective surface of the second mirror 53 and the rotation of the filter wheel 22
  • the surface P2 is directed toward the first surface P3 of the first beam splitter 41 for reflecting the blue laser beam reflected by the second reflecting surface 53 to the annular filter layer 221 of the rotating filter color wheel 22, and is also used for a yellow fluorescent and green fluorescent, transmissive red laser beam reflected by a beam splitter 41 is transmitted to the annular filter layer 221 of the rotating filter color wheel 22;
  • the reflecting surface of the red laser mirror 51 faces the second surface P4 of the first dichroic mirror 41 (the first dichroic mirror 41 is away from the side of the rotating fluorescent color wheel 21), and the normal to the second reference of the red laser mirror 51 Line S2 forms an angle b, which satisfies the formula It is used to reflect the red laser beam transmitted by the first beam splitter 41 to the first beam splitter 41, and is transmitted to the second beam splitter 42 via the first beam splitter 41, and then transmitted to the rotating filter color through the second beam splitter 42.
  • the annular filter layer 221 of the wheel 22 is subjected to a filtering process;
  • the red laser light source 12 is located on a side away from the reflective surface of the red laser mirror 51, and forms a first off-axis angle a with the first reference line S1, so that the red laser light source can utilize the space reasonably, and the structure is compact, even if the red laser light source is added.
  • the volume of the projection light source also does not increase significantly.
  • the blue laser light source 11 emits a blue laser beam, which is transmitted through the first beam splitter 41 to the collecting lens 31, and then through the collecting lens 31.
  • the annular fluorescent layer 212 is condensed to the rotating fluorescent color wheel 21, and if the blue laser beam is concentrated to the green phosphor region 2121 of the annular fluorescent layer 212, it is absorbed by the green phosphor region 2121 and reflects green fluorescence, and the green fluorescent light is It is reflected to the condensing lens 31 and condensed to the first beam splitter 41 via the condensing lens 31, and then reflected by the first beam splitter 41 to the second beam splitter 42 and then transmitted to the rotating filter wheel 22 via the second beam splitter 42.
  • the annular filter layer 221 performs a filtering process; if the blue laser beam converges to the yellow phosphor region 2122 of the annular fluorescent layer 212, it is absorbed by the yellow phosphor region 2122 and reflects yellow fluorescence, which is reflected to
  • the condensing lens 31 is condensed by the condensing lens 31 to the first dichroic mirror 41, and then reflected by the first dichroic mirror 41 to the second dichroic mirror 42 and then transmitted to the ring of the rotating filter color wheel 22 via the second dichroic mirror 42.
  • the filter layer 221 is subjected to a filter treatment;
  • the blue laser beam is concentrated to the blue laser transmitting region 2123 of the annular fluorescent layer 212, it is transmitted to the first mirror 52 via the blue laser transmitting region 2123, and then reflected to the second mirror 53 via the first mirror 52.
  • the second mirror 53 is reflected to the second beam splitter 42 and then transmitted to the annular filter layer 221 of the rotating filter wheel 22 via the second beam splitter 42 for filtering processing.
  • the red laser source 12 emits a red laser.
  • the red laser beam is incident on the condensing lens 31 off-axis, and is concentrated by the condensing lens 31 to the annular reflective diffusion layer 211 of the rotating fluorescent color wheel 21, and then diffused and reflected by the annular reflective diffusion layer 211 to the collecting lens 31.
  • the direction of the red laser beam is changed, and then concentrated by the collecting lens 31 to the red laser mirror 51, reflected by the red laser mirror 51 to the first beam splitter 41, and then transmitted to the second beam splitter 42 via the first beam splitter 41. Then, it is transmitted to the annular filter layer 221 of the rotary filter color wheel 22 via the second dichroic mirror 42 to perform a filtering process.
  • red, blue and green light with higher color purity are obtained, and the obtained red, blue and green light can be combined to obtain white light with higher color gamut.
  • the embodiment of the present invention provides a projection light source and a projection system thereof, the projection light source includes: a blue laser light source, a red laser light source, and a rotating fluorescent color. a wheel, a concentrating lens, a first beam splitter, and a red laser mirror.
  • the working surface of the rotating fluorescent color wheel is provided with an annular fluorescent layer and a circular reflective diffusion layer, and the annular fluorescent layer and the annular reflective diffusion layer are disposed adjacent to each other; wherein, the blue The laser light source, the red laser light source, the collecting lens, the first beam splitter and the red laser mirror are all disposed on the working surface side of the rotating fluorescent color wheel, and the circular fluorescent layer of the rotating fluorescent color wheel, the collecting lens, the first The beam splitter and the blue laser source are located on the first reference line, the red laser mirror and the first beam splitter are located on the second reference line, and the red laser source is off-axis, so that the red laser beam emitted by the red laser source and the first reference The line forms a first off-axis angle a.
  • the above embodiment improves the color purity of the red light by adding a red laser light source instead of filtering the yellow light in the projection light source, improves the color gamut of the projection light source, and does not affect the brightness of the projection light source, thereby ensuring the brightness of the projection light source and Color gamut; at the same time, by setting a circular reflection diffusion layer in the projection light source, and setting the red laser light source off-axis, so that the red laser light source can be disposed on the same side as the blue laser light source, and the rotating fluorescent color wheel and the blue laser can be reasonably utilized.
  • the space between the light sources makes the projection light source compact and the volume is not greatly increased by the addition of the red laser source.
  • FIG. 4 is a schematic structural diagram of a projection light source according to an embodiment of the present invention.
  • the projection light source 1 is applied to a projection system.
  • the projection light source 1 is substantially the same as the projection light source described in the first embodiment. For example, I will not repeat them here.
  • the projection light source 1 includes: a blue laser light source 11, a red laser light source 12, a rotating fluorescent color wheel 21, a rotating filter color wheel 22, a collecting lens 31, and a first beam splitting.
  • a mirror 41, a red laser mirror 51, and a blue laser mirror 54 are provided.
  • the annular fluorescent layer 212 of the rotating fluorescent color wheel 21 includes a green phosphor region 2121, a yellow phosphor region 2122, and a blue laser reflecting region 2124, and the green phosphor region 2121 and the yellow phosphor region.
  • the 2122 and blue laser reflection regions 2124 are circumferentially disposed along the annular fluorescent layer 212, and the areas of the green phosphor region 2121, the yellow phosphor region 2122, and the blue laser reflection region 2124 are the same.
  • the area of the green phosphor region 2121, the yellow phosphor region 2122, and the blue laser reflective region 2124 may be unequally set according to actual needs.
  • the green phosphor region 2121 When the blue laser beam is incident on the green phosphor region 2121 of the annular fluorescent layer 212, the green phosphor region 2121 absorbs the blue laser beam and is stimulated to reflect green fluorescence;
  • the yellow phosphor region 2122 absorbs the blue laser beam and is stimulated to reflect yellow fluorescence
  • the blue laser reflection region 2124 reflects the blue laser beam so that the blue laser beam can be reflected to the blue laser reflection.
  • the mirror 54 to change the direction of the blue laser beam, can reduce the use of optical components and make the structure compact.
  • the blue laser mirror 54 is a planar mirror for reflecting a blue laser beam.
  • the blue laser mirror 54 can also be a curved mirror or a curved mirror or the like.
  • the blue laser light source 11, the red laser light source 12, the condensing lens 31, the first beam splitter 41, the red laser mirror 51, and the blue laser mirror 54 are all disposed on the working surface P1 of the rotating fluorescent color wheel 21. Side and,
  • the annular fluorescent layer 212, the collecting lens 31, and the first dichroic mirror 41 of the rotating fluorescent color wheel 21 are sequentially located on the first reference line S1, that is, the annular fluorescent layer 212 of the rotating fluorescent color wheel 21, the collecting lens 31, and the first The central axis of the beam splitter 41 coincides with the first reference line S1;
  • the circular filter layer 221 of the red laser mirror 51, the first beam splitter 41, and the rotating filter color wheel 22 is sequentially located on the second reference line S2, that is, the red laser mirror 51, the first beam splitter 41, and the rotating filter.
  • the central axis of the annular filter layer 221 of the color wheel 22 coincides with the second reference line S2;
  • the blue laser mirror 54 is located on the second surface P4 side of the first beam splitter 41, not located on the first reference line S1 and the second reference line S2;
  • the blue laser light source 11 is disposed off-axis such that the blue laser beam emitted therefrom forms a second off-axis angle c with the first reference line S1, and the second off-axis angle c satisfies the formula Wherein d 2 is the distance from the edge of the annular fluorescent layer 212 to the first reference line S1, and f is the focal length of the collecting lens;
  • the red laser source 12 is also disposed off-axis such that the red laser beam emitted therefrom forms a first off-axis angle a with the first reference line S1, and the first off-axis angle a satisfies the formula Where d is the distance from the center loop of the annular reflective diffusion layer 211 to the first reference line S1, and f is the focal length of the collecting lens 31.
  • the red laser source 12 is disposed off-axis and the annular reflective diffusion layer 211 is disposed to reflect the red laser beam emitted by the red laser source 12, so that the red laser source can be disposed on the same side as the blue laser source, and the rotating fluorescent color wheel is utilized reasonably.
  • the space between the blue laser sources makes the projection light source compact and the volume is not greatly increased by the addition of the red laser source.
  • the first reference line S1 and the second reference line S2 are located in the same plane and are perpendicular to each other.
  • the first beam splitter 41 is located between the working surface P1 of the rotating fluorescent color wheel 21 and the blue laser light source 11 and the red laser light source 12, and the working surface P1 of the rotating fluorescent color wheel 21 is perpendicular to the first reference line S1.
  • the blue laser beam emitted from the blue laser source 11 forms a second off-axis angle c with the first reference line S1
  • the red laser beam emitted from the red laser source 12 forms a first off-axis angle a with the first reference line S1.
  • a splitting mirror 41 is at an angle of 45° with the first reference line S1 such that the first surface P3 of the first beam splitter 41 faces the working surface P1 of the rotating fluorescent color wheel 21, and the first surface P3 is also oriented toward the rotating filter.
  • the working surface P2 of the color wheel 22, the second surface P4 faces the blue laser light source 11 and the red laser light source 12, and the second surface P4 also faces the red laser mirror 51 and the blue laser mirror 54, the first The dichroic mirror 41 is configured to transmit the red laser beam emitted from the red laser source 12 to the annular reflection diffusion layer 211 of the rotating fluorescent color wheel 21, and transmit the red laser beam reflected from the red laser mirror 51 to the ring of the rotating filter color wheel 22.
  • Filter layer 221 also used to The green fluorescent light reflected by the green fluorescent powder region 2121 and the yellow fluorescent light reflected by the yellow fluorescent powder region 2122 are reflected to the annular filter layer 221 of the rotating filter color wheel 22, and transmitted through the blue laser reflecting region 2124.
  • a blue laser beam, and a blue laser beam reflected by the blue laser mirror 54 is transmitted to the annular filter layer 221 of the rotating filter color wheel 22;
  • the collecting lens 31 is located between the working surface P1 of the rotating fluorescent color wheel 21 and the first surface P3 of the first beam splitter 41, which is perpendicular to the first reference line S1 for the operation of the incident fluorescent color wheel 21.
  • the light beam of the surface P1 and the light beam emitted from the working surface P1 of the rotating fluorescent color wheel 21 are condensed so that the light beams can be accurately concentrated to the target position;
  • the reflecting surface of the red laser mirror 51 faces the second surface P4 of the first dichroic mirror 41 (the first dichroic mirror 41 is away from the side of the rotating fluorescent color wheel 21), and the normal to the second reference of the red laser mirror 51 Line S2 forms an angle b, which satisfies the formula
  • the red laser beam for diffusing and reflecting the annular reflective diffusion layer 211 of the rotating fluorescent color wheel 21 is reflected to the first beam splitter 41;
  • the reflecting surface of the blue laser mirror 54 faces the second surface P4 of the first beam splitter 41 (the first beam splitter 41 is away from the side of the rotating fluorescent color wheel 21), adjacent to the red laser mirror 51, and the blue
  • the normal line of the laser mirror 54 forms an angle b' (not shown) with the second reference line S2, and the angle b' satisfies the formula It is used to reflect the blue laser beam transmitted by the first dichroic mirror 41 to the first dichroic mirror 41 to change the direction of the blue laser beam.
  • the use of optical components is reduced and the optical components are concentrated on one side, making the structure more compact.
  • the blue laser light source 11 emits a blue laser beam, which is off-axis incident on the collecting lens 31, and is concentrated to the rotating fluorescent color via the collecting lens 31.
  • the condensing lens 31 is condensed by the condensing lens 31 to the first beam splitter 41, and then reflected by the first beam splitter 41 to the annular filter layer 221 of the rotating filter color wheel 22 for filtering; if the blue laser beam is concentrated to When the yellow phosphor region 2122 of the annular fluorescent layer 212 is absorbed by the yellow phosphor region 2122 and reflects yellow fluorescence, the yellow fluorescent light is reflected to the collecting lens 31 and concentrated by the collecting lens 31 to the first beam splitter 41, and then The annular filter layer 221 reflected by the first dichroic mirror 41 to the rotating filter color wheel 22 performs a filtering process; if the blue laser beam is concentrated to the blue laser reflecting region 2124 of the annular fluorescent layer 212, via the blue laser Reflection zone 2124 reflection
  • the condensing lens 31 is condensed to the first beam splitter 41 via the condensing lens 31, transmitted to the blue laser mirror 54 via the first beam splitter 41, and reflected to the first beam splitter 41 via
  • the first beam splitter 41 transmits the annular filter layer 221 of the rotating filter color wheel 22 to filter processing; meanwhile, the red laser source 12 emits a red laser beam, and the red laser beam is off-axis incident to the first beam splitter. 41, transmitted to the collecting lens 31 via the first dichroic mirror 41, concentrated to the annular reflective diffusion layer 211 of the rotating fluorescent color wheel 21 via the collecting lens 31, and diffused and reflected by the annular reflective diffusion layer 211 to the collecting lens 31, The direction of the red laser beam is changed, and then concentrated by the collecting lens 31 to the red laser mirror 51, reflected by the red laser mirror 51 to the first beam splitter 41, and then transmitted to the rotating filter wheel 22 via the first beam splitter 41.
  • the annular filter layer 221 is subjected to a filter treatment.
  • red, blue and green light with higher color purity are obtained, and the obtained red, blue and green light can be combined to obtain white light with higher color gamut.
  • the embodiment of the present invention provides a projection light source and a projection system thereof, the projection light source includes: a blue laser light source, a red laser light source, and a rotating fluorescent color. a wheel, a concentrating lens, a first beam splitter, and a red laser mirror.
  • the working surface of the rotating fluorescent color wheel is provided with an annular fluorescent layer and a circular reflective diffusion layer, and the annular fluorescent layer and the annular reflective diffusion layer are disposed adjacent to each other; wherein, the blue The laser light source, the red laser light source, the collecting lens, the first beam splitter and the red laser mirror are all disposed on the working surface side of the rotating fluorescent color wheel, and the circular fluorescent layer of the rotating fluorescent color wheel, the collecting lens, the first The beam splitter and the blue laser source are located on the first reference line, the red laser mirror and the first beam splitter are located on the second reference line, and the red laser source is off-axis, so that the red laser beam emitted by the red laser source and the first reference The line forms a first off-axis angle a.
  • the above embodiment improves the color purity of the red light by adding a red laser light source instead of filtering the yellow light in the projection light source, improves the color gamut of the projection light source, and does not affect the brightness of the projection light source, thereby ensuring the brightness of the projection light source and Color gamut; at the same time, by setting a circular reflection diffusion layer in the projection light source, and setting the red laser light source off-axis, so that the red laser light source can be disposed on the same side as the blue laser light source, and the rotating fluorescent color wheel and the blue laser can be reasonably utilized.
  • the space between the light sources makes the projection light source compact and the volume is not greatly increased by the addition of the red laser source.
  • FIG. 7 is a schematic structural diagram of a projection light source according to an embodiment of the present invention.
  • the projection light source 1 is applied to a projection system.
  • the projection light source 1 is substantially the same as the projection light source described in the first embodiment. For example, I will not repeat them here.
  • the projection light source 1 includes: a blue laser light source 11, a red laser light source 12, a rotating fluorescent color wheel 21, a rotating filter color wheel 22, a collecting lens 31, and a first beam splitting.
  • the mirror 41 and the red laser mirror 51 includes: a blue laser light source 11, a red laser light source 12, a rotating fluorescent color wheel 21, a rotating filter color wheel 22, a collecting lens 31, and a first beam splitting.
  • the mirror 41 and the red laser mirror 51 includes: a blue laser light source 11, a red laser light source 12, a rotating fluorescent color wheel 21, a rotating filter color wheel 22, a collecting lens 31, and a first beam splitting.
  • the mirror 41 and the red laser mirror 51 includes: a blue laser light source 11, a red laser light source 12, a rotating fluorescent color wheel 21, a rotating filter color wheel 22, a collecting lens 31, and a first beam splitting.
  • the annular fluorescent layer 212 of the rotating fluorescent color wheel 21 includes a green phosphor region 2121, a yellow phosphor region 2122, and a blue laser reflective scattering region 2125.
  • the region 2122 and the blue laser reflective scattering region 2125 are circumferentially disposed along the annular fluorescent layer 212, and the regions of the green phosphor region 2121, the yellow phosphor region 2122, and the blue laser reflective scattering region 2125 are the same.
  • the area of the green phosphor region 2121, the yellow phosphor region 2122, and the blue laser reflective scattering region 2125 can be unequally set according to actual needs.
  • the green phosphor region 2121 When the blue laser beam is incident on the green phosphor region 2121 of the annular fluorescent layer 212, the green phosphor region 2121 absorbs the blue laser beam and is stimulated to reflect green fluorescence;
  • the yellow phosphor region 2122 absorbs the blue laser beam and is stimulated to reflect yellow fluorescence
  • the blue laser reflection scattering region 2125 scatters and reflects the blue laser beam to eliminate the blue laser beam speckle and expand the blue color.
  • the angle of reflection of the laser beam enables the blue laser beam to be reflected to the first reflective segment 411 and the second reflective segment 412, reducing the use of the mirror, making the structure more compact and reducing the volume of the projected light source to some extent.
  • the first beam splitter 41 includes a first reflective segment 411, a second reflective segment 412, and a transmissive segment 413 disposed between the first reflective segment 411 and the second reflective segment 412.
  • the first reflective segment 411 and the second reflective segment 412 are used for reflecting the blue laser beam, the yellow fluorescent light and the green fluorescent light
  • the transmitting segment 413 is for transmitting the blue laser beam and the red laser beam, reflecting the yellow fluorescent light and the green fluorescent light, so
  • the length of the transmission section 413 is not less than the spot diameter of the blue laser beam, so that the transmission section 413 can completely transmit the blue laser beam, and the smaller the length of the transmission section 413, the smaller the blue loss.
  • the blue laser light source 11, the red laser light source 12, the condensing lens 31, the first beam splitter 41, and the red laser mirror 51 are all disposed on the working surface P1 side of the rotating fluorescent color wheel 21, and
  • the annular fluorescent layer 212, the collecting lens 31, the first dichroic mirror 41, and the blue laser light source 11 of the rotating fluorescent color wheel 21 are sequentially located on the first reference line S1, that is, the annular fluorescent layer 212 of the rotating fluorescent color wheel 21,
  • the central axes of the optical lens 31, the first dichroic mirror 41, and the blue laser light source 11 are coincident with the first reference line S1;
  • the circular filter layer 221 of the red laser mirror 51, the first beam splitter 41, and the rotating filter color wheel 22 is sequentially located on the second reference line S2, that is, the red laser mirror 51, the first beam splitter 41, and the rotating filter.
  • the central axis of the annular filter layer 221 of the color wheel 22 coincides with the second reference line S2;
  • the red laser source 12 is disposed off-axis such that the red laser beam emitted therefrom forms a first off-axis angle a with the first reference line S1, and the first off-axis angle a satisfies the formula Where d is the distance from the center loop of the annular reflective diffusion layer 211 to the first reference line S1, and f is the focal length of the collecting lens 31.
  • the red laser source 12 is disposed off-axis and the annular reflective diffusion layer 211 is disposed to reflect the red laser beam emitted by the red laser source 12, so that the red laser source can be disposed on the same side as the blue laser source, and the rotating fluorescent color wheel is utilized reasonably.
  • the space between the blue laser sources makes the projection light source compact and the volume is not greatly increased by the addition of the red laser source.
  • the first reference line S1 and the second reference line S2 are located in the same plane and are perpendicular to each other.
  • the first beam splitter 41 is located between the working surface P1 of the rotating fluorescent color wheel 21 and the blue laser light source 11, the working surface P1 of the rotating fluorescent color wheel 21 is perpendicular to the first reference line S1, and the blue laser light source 11
  • the emitted blue laser beam coincides with the first reference line S1
  • the first beam splitter 41 has an angle of 45° with the first reference line S1, so that the first surface P3 of the first beam splitter 41 faces the rotating fluorescent color wheel.
  • the transmissive section 413 of the first dichroic mirror 41 is configured to transmit the blue laser beam emitted from the blue laser source 11 to the annular fluorescent layer 212 of the rotating fluorescent color wheel 21, the first reflecting section 411, the second reflecting section 412, and The transmissive section 413 reflects the green fluorescent light reflected by the green fluorescent powder area 2121 of the annular fluorescent layer 212 and the yellow fluorescent light reflected by the yellow fluorescent powder area 2122 to the annular filter layer 221 of the rotating filter color wheel 22; the first reflecting section 411 and The second reflective segment 412 will blue the annular fluorescent layer 212
  • the blue laser beam scattered and reflected by the light reflection scattering region 2125 is reflected to the annular filter layer 221 of the rotating filter color wheel 22; the first beam splitter 41 is also used to transmit the red laser beam and
  • the collecting lens 31 is located between the working surface P1 of the rotating fluorescent color wheel 21 and the first surface P3 of the first beam splitter 41, which is perpendicular to the first reference line S1 for the operation of the incident fluorescent color wheel 21.
  • the light beam of the surface P1 and the light beam emitted from the working surface P1 of the rotating fluorescent color wheel 21 are condensed so that the light beams can be accurately concentrated to the target position;
  • the reflecting surface of the red laser mirror 51 faces the second surface P4 of the first dichroic mirror 41 (the first dichroic mirror 41 is away from the side of the rotating fluorescent color wheel 21), and the normal to the second reference of the red laser mirror 51 Line S2 forms an angle b, which satisfies the formula It is used to reflect the red laser beam transmitted by the first beam splitter 41 to the first beam splitter 41, and is transmitted to the annular filter layer 221 of the rotating filter color wheel 22 via the first beam splitter 41 for filtering processing;
  • the red laser light source 12 is located on a side away from the reflective surface of the red laser mirror 51, and forms a first off-axis angle a with the first reference line S1, so that the red laser light source can utilize the space reasonably, and the structure is compact, even if the red laser light source is added.
  • the volume of the projection light source also does not increase significantly.
  • the use of the mirror is reduced, the volume of the projection light source is reduced to some extent, and at the same time, the structure is made more compact by concentrating the optical elements on one side.
  • the blue laser light source 11 emits a blue laser beam, which is transmitted through the transmission section 413 of the first beam splitter 41 to the collecting lens 31, and then The condensing lens 31 converges to the annular fluorescent layer 212 of the rotating fluorescent color wheel 21. If the blue laser beam converges to the green phosphor region 2121 of the annular fluorescent layer 212, it is absorbed by the green phosphor region 2121 and reflects green fluorescence.
  • the green fluorescence is reflected to the collecting lens 31 and concentrated by the collecting lens 31 to the first beam splitter 41, and then reflected by the first beam splitter 41 to the annular filter layer 221 of the rotating filter wheel 22 for filtering treatment; If the blue laser beam is concentrated to the yellow phosphor region 2122 of the annular fluorescent layer 212, it is absorbed by the yellow phosphor region 2122 and reflects yellow fluorescence, which is reflected to the collecting lens 31 and concentrated by the collecting lens 31.
  • the scattering region 2125 is The color laser reflective scattering region 2125 is scatter-reflected to the first reflecting segment 411 of the first beam splitter 41 and the second reflecting segment 412 is reflected to the annular filter layer 221 of the rotating filter color wheel 22 for filtering treatment to reduce the blue laser light.
  • the light beam is lost from the transmission section 413. At this time, the smaller the length of the transmission section 413 is, the smaller the loss of the blue laser beam is.
  • the red laser source 12 emits a red laser beam, and the red laser beam is off-axis incident to the poly
  • the optical lens 31 is condensed to the annular reflective diffusion layer 211 of the rotating fluorescent color wheel 21 via the collecting lens 31, and then diffused and reflected by the annular reflective diffusion layer 211 to the collecting lens 31 to change the direction of the red laser beam, and then condensed.
  • the lens 31 is condensed to the red laser mirror 51, reflected by the red laser mirror 51 to the first beam splitter 41, transmitted to the second beam splitter 42 via the first beam splitter 41, and transmitted to the rotary filter via the second beam splitter 42.
  • the annular filter layer 221 of the color wheel 22 is subjected to a filter process.
  • red, blue and green light with higher color purity are obtained, and the obtained red, blue and green light can be combined to obtain white light with higher color gamut.
  • the embodiment of the present invention provides a projection light source and a projection system thereof, the projection light source includes: a blue laser light source, a red laser light source, and a rotating fluorescent color. a wheel, a concentrating lens, a first beam splitter, and a red laser mirror.
  • the working surface of the rotating fluorescent color wheel is provided with an annular fluorescent layer and a circular reflective diffusion layer, and the annular fluorescent layer and the annular reflective diffusion layer are disposed adjacent to each other; wherein, the blue The laser light source, the red laser light source, the collecting lens, the first beam splitter and the red laser mirror are all disposed on the working surface side of the rotating fluorescent color wheel, and the circular fluorescent layer of the rotating fluorescent color wheel, the collecting lens, the first The beam splitter and the blue laser source are located on the first reference line, the red laser mirror and the first beam splitter are located on the second reference line, and the red laser source is off-axis, so that the red laser beam emitted by the red laser source and the first reference The line forms a first off-axis angle a.
  • the above embodiment improves the color purity of the red light by adding a red laser light source instead of filtering the yellow light in the projection light source, improves the color gamut of the projection light source, and does not affect the brightness of the projection light source, thereby ensuring the brightness of the projection light source and Color gamut; at the same time, by setting a circular reflection diffusion layer in the projection light source, and setting the red laser light source off-axis, so that the red laser light source can be disposed on the same side as the blue laser light source, and the rotating fluorescent color wheel and the blue laser can be reasonably utilized.
  • the space between the light sources makes the projection light source compact and the volume is not greatly increased by the addition of the red laser source.
  • Embodiments of the present invention also provide a projection system including the projection light source 1, the display chip, and the projection lens described in the above embodiments.
  • the projection system further includes a housing, a square bar or a fly-eye lens, a prism set, or a freeform lens group.
  • the outer casing forms a accommodating cavity
  • the projection light source 1, the outer casing, the square rod or the fly-eye lens, the prism group or the free-form lens group, and the display chip are installed in the accommodating cavity of the outer casing;
  • the outer casing is further provided with an opening, the opening The accommodating cavity is in communication with an outer space of the outer casing, and the projection lens is mounted to the opening.

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
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  • Projection Apparatus (AREA)

Abstract

La présente invention porte sur une source de lumière de projection (1) et sur un système de projection associé, comprenant : une source de lumière laser bleue (11), une source de lumière laser rouge (12), une roue de couleurs fluorescentes rotative (21), une lentille collectrice (31), un premier diviseur de faisceau (41) et un miroir laser rouge (51). Une couche fluorescente annulaire (212) et une couche de diffusion réfléchissante circulaire (211) sont disposées de manière adjacente sur une surface active (P1) de la roue de couleurs fluorescentes rotative (21). La source de lumière laser bleue (11), la source de lumière laser rouge (12), la lentille collectrice (31), le premier diviseur de faisceau (41) et le miroir laser rouge (51) sont tous disposés sur un côté de la surface active (P1) de la roue de couleurs fluorescentes rotative (21). La couche fluorescente annulaire (212) de la roue de couleurs fluorescentes rotative (21), la lentille collectrice (31), le premier diviseur de faisceau (41) et la source de lumière laser bleue (11) sont situés au niveau d'une première ligne de référence (S1). Le miroir laser rouge (51) et le premier diviseur de faisceau (41) sont situés au niveau d'une seconde ligne de référence (S2). La source de lumière laser rouge (12) est agencée hors-axe, et un faisceau laser rouge émis forme ainsi un premier angle hors-axe a avec la première ligne de référence (S1), ce qui permet d'augmenter la gamme de couleurs de la source de lumière de projection (1) sans affecter la luminosité de cette dernière, amenant simultanément la structure de la source de lumière de projection (1) à être compacte.
PCT/CN2019/070264 2018-03-23 2019-01-03 Source de lumière de projection et système de projection associé WO2019179209A1 (fr)

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CN206610072U (zh) * 2017-03-14 2017-11-03 深圳市光峰光电技术有限公司 光源装置及投影***
CN107797372A (zh) * 2017-11-17 2018-03-13 四川长虹电器股份有限公司 一种双色激光光源光学引擎***
CN108663881A (zh) * 2018-03-23 2018-10-16 广景视睿科技（深圳）有限公司 一种投影光源及其投影***

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CN116430662A (zh) * 2023-06-13 2023-07-14 宜宾市极米光电有限公司 一种光源***及投影设备
CN116430662B (zh) * 2023-06-13 2023-08-15 宜宾市极米光电有限公司 一种光源***及投影设备

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