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WO2013067807A1 - Système de source lumineuse, équipement d'éclairage et appareil de projection - Google Patents

Système de source lumineuse, équipement d'éclairage et appareil de projection Download PDF

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Publication number
WO2013067807A1
WO2013067807A1 PCT/CN2012/075643 CN2012075643W WO2013067807A1 WO 2013067807 A1 WO2013067807 A1 WO 2013067807A1 CN 2012075643 W CN2012075643 W CN 2012075643W WO 2013067807 A1 WO2013067807 A1 WO 2013067807A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
incident
light source
color wheel
source system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2012/075643
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English (en)
Chinese (zh)
Inventor
胡飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Appotronics Corp Ltd
Original Assignee
Appotronics Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Appotronics Corp Ltd filed Critical Appotronics Corp Ltd
Publication of WO2013067807A1 publication Critical patent/WO2013067807A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/141—Beam splitting or combining systems operating by reflection only using dichroic mirrors
    • 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
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/08—Sequential recording or projection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
    • H04N9/3114—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing one colour at a time

Definitions

  • Light source system illumination device and projection device
  • the present invention relates to the field of optics, and in particular to a light source system, a lighting device, and a projection device. Background technique
  • Multi-color light sources are widely used in a variety of applications such as projection display and stage lighting. As shown
  • the excitation light generated by the excitation light source 102 is condensed by the lens 103 and incident on the color wheel 104.
  • a plurality of phosphor regions such as a green phosphor region, a red phosphor region, and a blue phosphor region, are respectively disposed on the color wheel 104 in the circumferential direction.
  • the fluorescent color wheel 104 is rotated by the driving device 105 such that the above-mentioned regions on the color wheel 104 are alternately disposed on the transmission path of the excitation light generated by the excitation light source 102, thereby converting the excitation light incident thereon into green light. , red or blue light, forming a sequence of colored light.
  • the color light sequence described above is further used for subsequent projection display.
  • the color images produced on the screen are derived from images of different colors that quickly switch the integral effect in the human eye on the screen. If the image of different colors is not fast enough to switch on the screen, it will cause a color breakup phenomenon, that is, as the blink or the field of view moves, the viewer can instantly see the monochromatic light.
  • the switching speed is proportional to the rotational speed of the driving device 105 that drives the color wheel 104 to rotate. Due to the speed limitation of the driving device 105, the color splitting phenomenon cannot be solved.
  • three sets of independent excitation light sources (not shown) generate three beams of excitation light 201A, 201B, and 201C respectively incident on three different colors.
  • the phosphor color wheels 202A, 202B, and 202C respectively excite the phosphors on the respective color wheels 202A, 202B, and 202C, thereby generating three laser beams of different colors.
  • These three beams are combined by the optical filters by the spectral filters 203B and 203C and collected by the light collecting means 204.
  • each color wheel 202A, 202B and 202C is only produced When a single color of light is generated, its wavelength conversion characteristics do not change with time, so it is only necessary to alternately turn on and off the corresponding excitation light source to obtain a colored light sequence.
  • the technical problem to be solved by the present invention is to provide a light source system, a lighting device and a projection device to substantially reduce the number of color wheels, thereby reducing the volume of the light source system and reducing the cost of the light source system.
  • a technical solution adopted by the present invention is to provide a light source system including a color wheel and an optical path combining system.
  • the color wheel is for receiving at least two incident lights at different positions and correspondingly outputting at least two outgoing lights.
  • the optical path combining system is configured to combine the optical paths of the at least two outgoing beams.
  • the color wheel is provided with a first area, the first area receives the first incident light, and wavelength-converts the first incident light to generate the first outgoing light.
  • the color wheel is further provided with a second area, the second area receives the second incident light, and transmits or reflects the second incident light without performing wavelength conversion to generate the second outgoing light.
  • the color wheel is further provided with a third area, the third area receives the third incident light, and performs wavelength conversion on the third incident light to generate the third outgoing light.
  • the color wheel is further provided with a second area, the second area receives the second incident light, and performs wavelength conversion on the second incident light to generate the second outgoing light.
  • the color wheel is further provided with a third area, the third area receives the third incident light, and performs wavelength conversion on the third incident light to generate the third outgoing light.
  • the first region further receives the second incident light at a receiving position different from the first incident light, and performs wavelength conversion on the second incident light to generate a second outgoing light having the same color as the first outgoing light, and the optical path combining system
  • the first outgoing light and the second outgoing light are respectively filtered to correspondingly generate the third outgoing light and the fourth outgoing light of different colors, and the third outgoing light and the fourth outgoing light are optically combined.
  • the first outgoing light and the second outgoing light are yellow light or yellow green light
  • the third outgoing light is green Light
  • the fourth outgoing light is red light
  • first incident light and the second incident light form a spot on the color wheel acting on the first wavelength conversion region along a concentric circular path, wherein the circular paths of the first incident light and the second incident light have the same diameter or different.
  • the color wheel is further provided with a second region, the second region receives the second incident light, the second region performs wavelength conversion on the second incident light or transmits or reflects the second incident light without performing wavelength conversion.
  • the optical path combining device combines the optical paths of the third outgoing light, the fourth outgoing light, and the fifth outgoing light.
  • the optical path combining system includes at least one spectral filter, the spectral filter transmitting at least a portion of a spectral component of the at least two of the at least two outgoing lights and reflecting at least another of the at least two incident lights Part of the spectral component to combine the optical paths of the two outgoing beams.
  • the optical path merging system comprises an optical film, the optical film is provided with a through hole, and one of the at least two incident lights is incident on the color wheel through the through hole, and the color wheel scatters and reflects the incident light. To produce the outgoing light in the form of scattered light, the optical film further reflects the outgoing light incident on the outer region of the through hole of the optical film in the form of scattered light.
  • the light source system further includes a mirror, wherein at least one of the incident light is reflected by the mirror and then incident on the color wheel, and the color wheel scatters and reflects the incident light to generate a form of scattered light.
  • the light is emitted, and the emitted light in the form of scattered light is emitted from the outside of the mirror to the optical path combining system.
  • the light source system further comprises at least two light source means and a control means, the at least two light source means respectively generating a corresponding one of the at least two incident lights, the control means independently controlling the opening and closing and the luminous intensity of the at least two light source means.
  • the optical film is a spectroscopic filter provided with a through hole, the spectroscopic filter further transmits supplemental light incident on the spectroscopic filter without passing through the color wheel, and the complementary light is incident thereon, the optical film
  • the sheet is a spectroscopic filter, and the emitted light in the form of scattered light is emitted from the outside of the mirror to the spectroscopic filter, and the spectroscopic filter further transmits supplemental light incident on the spectroscopic filter without passing through the color wheel, and The supplemental light is incident on the outside of the mirror to the spectroscopic filter
  • the outgoing light of the light sheet is merged by the optical path.
  • the optical path combining system further receives supplemental light that is incident on the optical path combining system without passing through the color wheel, and the optical path combining system further combines the complementary light with the at least two outgoing lights output by the color wheel.
  • the light source system further comprises at least three light source devices and a control device, at least the device independently controlling the opening and closing and the luminous intensity of the at least three light source devices.
  • the light source system further comprises a driving device for driving the color wheel such that at least two spots of incident light formed on the color wheel respectively act on the color wheel along a predetermined path.
  • the driving device is a rotating device, so that the spots formed by the at least two incident lights on the color wheel respectively act on the color wheel along a circular path.
  • another technical solution adopted by the present invention is to provide a projection apparatus including any one of the above-described light source systems.
  • another technical solution adopted by the present invention is to provide an illumination device including any one of the above-described light source systems.
  • the beneficial effects of the present invention are:
  • the invention can sufficiently reduce the number of color wheels, effectively reduce the volume of the light source system, and at the same time effectively reduce the cost of the light source system.
  • FIG. 1 is a schematic structural view of a prior art light source system
  • FIG. 2 is a schematic structural view of another prior art light source system
  • FIG. 3 is a schematic structural view of a first embodiment of a light source system of the present invention.
  • Figure 4 is a front elevational view of the color wheel of the light source system shown in Figure 3;
  • Figure 5 is a schematic structural view of a second embodiment of the light source system of the present invention.
  • Figure 6 is a front elevational view of the color wheel of the light source system shown in Figure 5;
  • FIG. 7 is a schematic view showing a fluorescence spectrum of a color wheel of the light source system shown in FIG. 5 and a filter spectral line of the spectral filter;
  • FIG. 8 is a schematic structural view of an optical path merging system of a third embodiment of the light source system of the present invention.
  • 9 is a schematic structural view of a fourth embodiment of a light source system of the present invention.
  • FIG. 10 is a schematic structural view of a fifth embodiment of a light source system of the present invention.
  • Figure 11 is a schematic structural view of a sixth embodiment of the light source system of the present invention.
  • Figure 12 is a schematic view showing the structure of a seventh embodiment of the light source system of the present invention. detailed description
  • the first embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 302, an optical path combining system 303, a light collecting device 304, and a driving device 305.
  • the three light sources correspondingly generate three incident lights 301A, 301B, and 301C.
  • the color wheel 302 receives the three incident lights 301A, 301B, and 301C at different positions, and outputs three beams of light (not shown) correspondingly.
  • the optical path combining system 303 combines the optical paths of the three outgoing beams, and the light collecting device 304 collects the three outgoing lights that have been merged by the optical path combining system 303 for subsequent projection display or other applications.
  • the color wheel 302 is provided with three annular regions 402A, 402B and 402C which are concentrically arranged and nested with each other.
  • Incident light 301A, 301B, and 301C are incident on regions 402A, 402B, and 402C, as shown by spots 401A, 401B, and 401C.
  • the driving device 305 is a rotating device for driving the color wheel 302 to rotate, so that the spots 401A, 401B, and 401C generated by the incident light 301A, 301B, and 301C on the color wheel 302 respectively act on the circular region 302A in the region 402A of the color wheel 302. , 402B and 402C.
  • regions 402A, 402B, and 402C may also be strip-shaped regions disposed in parallel or in other suitable arrangements.
  • the driving device 305 is a linear translation device or other suitable driving device, so that the spots 401A, 401B, and 401C generated by the incident light 301A, 301B, and 301C on the color wheel 302 respectively act on the color wheel 302 along a straight path or other predetermined path. .
  • the incident lights 301A, 301B, and 301C are prevented from acting on the same position of the color wheel 302 for a long time.
  • the resulting temperature is too high.
  • a red wavelength conversion material is disposed on the region 402A to be incident.
  • the incident light 301A thereon is converted into red light
  • the region 402B is provided with a blue wavelength converting material to convert the incident light 301B incident thereon into blue light
  • the region 402C is provided with a green wavelength converting material to The wavelength of the incident light 301C incident thereon is converted into green light.
  • the wavelength converting material includes a phosphor, a quantum dot material, and any other material capable of achieving a wavelength conversion function.
  • the optical path combining system 303 includes a total reflection mirror 303A and spectral filters 303B, 303C.
  • the red light output from the area 402A is reflected by the total reflection mirror 303A, is incident on the spectroscopic filter 303B, is transmitted through the spectroscopic filter 303B, is incident on the spectroscopic filter 303C, and is transmitted through the spectroscopic filter 303C and then incident on the light.
  • Collection device 304 The blue light output from the area 402B is reflected by the spectral filter 303B, is incident on the spectral filter 303C, is transmitted through the spectral filter 303C, and is incident on the light collecting means 304.
  • the green light output from the area 402C is reflected by the spectral filter 303C and then incident on the light collecting means 304, thereby realizing the optical path combination of the above three output lights.
  • light collecting device 304 can be any suitable optical component such as a lens or integrator rod.
  • total reflection mirror 303A may also be replaced by a spectroscopic filter that reflects red light. Since the spectral range of the output light generated by the wavelength conversion method is relatively wide, resulting in relatively low color saturation during display, the above-mentioned spectroscopic filter can be set to transmit or reflect a part of the spectral component of the corresponding output light to output light. The spectral range is modified to meet the color saturation requirements of the display.
  • a spectroscopic filter or a spectroscopic filter group is used as the optical path combining system. It utilizes the difference in wavelength of light in each optical path, and transmits the light on each optical path to the light collecting device through the transmission and reflection of the light on the different optical paths by the spectral filter; and the light in a certain optical path is in a light filtering filter. Whether the light sheet is transmitted or reflected is arbitrarily designed. For example, in the first embodiment, the positions of the red wavelength conversion material and the green wavelength conversion material can be interchanged. In this case, only the corresponding reflection and transmission characteristics of the respective filters need to be adjusted, and the same optical path combination can still be realized. The function.
  • the total reflection mirror 303A needs to be redesigned to reflect green light
  • the spectral filter 303B needs to be redesigned to reflect red light while transmitting green light
  • the spectral filter 303C needs to be redesigned to reflect red light while transmitting blue light and green light.
  • the specific optical structures of the different color lights passing through the optical path combining system on each optical path are listed for convenience of explanation. Further, in other embodiments, the number of regions on the color wheel 302 and the wavelength converting material thereon can be arbitrarily set according to display requirements.
  • the exiting light output by the color wheel 302 can be any combination of at least two of green, red, and blue.
  • any one of the above-described regions 402A, 402B, and 402C of the color wheel 302 may be disposed as a light transmitting region to transmit incident light rays incident thereon without wavelength conversion.
  • region 402B can be replaced with a light transmissive region.
  • the incident light 301B is blue light, and is transmitted by the region 402B, and is merged by the optical path combining system 303 with the red light and the green light generated by the regions 402A and 402C.
  • Region 402B may further be provided with a scattering material or other scattering mechanism to decoherent incident blue light.
  • the red, blue, and green lights for display are all output by the same color wheel 302, the number of color wheels is sufficiently reduced, the volume of the light source system is effectively reduced, and the light source is effectively reduced. The cost of the system.
  • the excitation light for exciting the red and green wavelength conversion materials is a semiconductor light source, such as a Light Emitting Diode (LED) or a Laser Diode (LD), and the emission wavelength may be a wavelength greater than or equal to The ultraviolet light of 320 nm and less than or equal to 420 nm may also be blue light of 420 or more and 480 nm or less.
  • LED Light Emitting Diode
  • LD Laser Diode
  • a second embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 502, an optical path combining system 503, a light collecting device 504, and a driving device 505.
  • the light source system of the present embodiment is different from the light source system shown in FIGS. 3-4 in that the color wheel 502 is provided with a region 602A, and incident light 501A and 501C are incident on different positions of the region 602A. Specific locations are shown as spots 601A and 601C.
  • the region 602A converts the incident light 501A and 501C incident thereon into wavelengths of the two outgoing lights of the same color, and then filters them into two other outgoing lights of different colors by the optical path combining system 503, and performs optical path combining.
  • the yellow-green light wave is disposed on the area 602A.
  • the material is long converted to convert incident light 501A and 501C into yellow-green light, respectively.
  • the yellow-green light converted by the incident light 501A is incident on the total reflection mirror 503A, is reflected by the total reflection mirror 503A, and is incident on the spectral filter 503B, and the yellow-green light converted by the incident light 501C is incident on the spectral filter 503C.
  • the spots 601A and 601C can act on the region 602A along a concentric circular path.
  • the diameters of the respective circular paths of the spots 601A and 601C may be the same or different, and the latter has higher fluorescence conversion efficiency than the former because: when two spots act on a circular path of the same diameter, The heat generated by the two excitation spots to excite the wavelength conversion material is distributed on this circular path, and the heat and temperature are accumulated; and when the two spots are respectively applied to two concentric circular paths of different diameters, two The excitation spot excites the heat generated by the wavelength converting material distributed over the two circular paths, and the temperature on the fluorescent conversion material is lower than when the two spots act on a circular path of the same diameter.
  • curve 701 is a spectrum curve of yellow-green light
  • curve 702 is a filter curve of the spectral filter 503B
  • curve 703 is a filter curve of the spectral filter 503C.
  • the green light component of yellow-green light (corresponding to a spectral range of about 500 nm or more and 570 nm or less) converted by the incident light 501A is reflected by the spectral filter 503B as stray light and cannot be collected by the collecting device 504.
  • the red light component (corresponding to a spectral range of about 580 nm or more and 680 nm or less) is transmitted to the spectral filter 503C by the spectral filter 503B, and transmitted through the spectral filter 503C, thereby outputting red light to the light.
  • the red light component of the yellow-green light converted by the incident light 501C is transmitted by the spectral filter 503C as stray light and cannot be collected by the collecting device 504, and the green light component is reflected by the spectral filter 503C, thereby outputting green light to the light collecting device. 504.
  • the incident light 501 A and 501C may also be subjected to wavelength conversion by the region 602A to generate yellow light, and filtered into red light and green light by the spectral filter 503B and the spectral filter 503C, respectively.
  • the spectral filters 503A and 503C in addition to having the function of combining the illumination of different optical paths, can also transmit or reflect the portion of the light incident thereon to the original light-emitting material.
  • the spectrum is filtered to make the color more suitable for practical use.
  • the color coordinates of the original spectrum 701 of the yellow-green wavelength conversion material are (0.414, 0.548), and the color coordinates of the green light obtained by the filtering of the above-described spectral filters 503A and 503C are (0.323). , 0.624 ), the color coordinate of red light is (0.65 0.35).
  • the standard color coordinate of green light is (0.3, 0.6), and the standard color coordinate of red light is (0.0.64, 0.33). It is obvious that the color of the filtered light is closer to the color of the label. It is worth noting that, in general, "filtering" of light means allowing part of the effective spectral energy to pass through, and the rest of the spectral energy is reflected or absorbed as ineffective light, but in the present invention, a certain kind of original light is transmitted.
  • the optical filter in the optical path combining system When the optical filter in the optical path combining system is "filtered", it means that part of the effective spectral energy of the original light is guided to the collecting device by the spectroscopic filter, and the remaining invalid spectral energy cannot be collected by the collecting device; The effective spectral energy is reflected or transmitted on the spectroscopic filter, which is determined by the optical structure of the particular optical path combining system.
  • the color wheel 502 is further provided with a region 602B, and the incident light 501B is incident on the region 602B as shown by the spot 601B.
  • the region 602B performs wavelength conversion on the incident light 501B or transmits the incident light 501B without performing wavelength conversion to output blue light.
  • the blue light output from the area 602B is reflected by the spectral filter 503B, transmitted through the spectral filter 503C, and combined with the above-described red and green light paths.
  • the red, green, and blue colors described above may be output light combinations of other different colors.
  • the optical path merging system of the third embodiment of the light source system of the present invention includes total reflection mirrors 803A, 803B and spectral filters 803C, 803D.
  • the optical path merging system of the present embodiment is different from the optical path merging system in the above embodiment in that the optical path of the present embodiment is not limited to being disposed in the same plane by the proper arrangement of the above components, thereby enhancing the optical path. Design flexibility.
  • a fourth embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 902, an optical path combining system 903, a light collecting device 904, and a driving device 905.
  • the light source system of the present embodiment differs from the light source system shown in FIGS. 5-7 in that incident light 901A and 901C are incident on the color wheel 902, and supplemental light 901B (for example, blue light) is directly incident on the color wheel 902.
  • the optical path combining system 903 is transmitted through the spectral filters 903A and 903B, and further, the wavelength conversion effect of the incident light 901A and 901C via the color wheel 902 and the outgoing light generated by the filtering of the spectral filters 903A and 903B (for example, Red light and green light) merge the light paths.
  • the supplemental light 901C is directly incident on the optical path without the action of the color wheel 902.
  • the merging system 903 can design the color wheel 902, and at the same time reduce the volume of the color wheel 902, which is advantageous for miniaturization.
  • the incident mode of the supplemental light 901C of the present embodiment is also applicable to the light source system shown in Figs.
  • a fifth embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 1002, an optical path combining system 1003, a light collecting device 1004, and a driving device 1005.
  • the light source system of the present embodiment is different from the light source system shown in FIG. 9 in that incident light 1001 A and 1001C are respectively transmitted through the spectral filters 1003A and 1003B and then incident on the color wheel 1002, and the incident light 1001A is passed through the color wheel 1002.
  • the emitted light generated by wavelength conversion with 1001C is reflected by the color wheel 1002 and then incident on the spectral filters 1003A and 1003B, and optically combined by the spectral filters 1003A and 1003B and the complementary light 1001B.
  • the color wheel 1002 outputs the emitted light in a reflective manner, so that the light source system can meet different optical path design requirements, thereby improving the flexibility of the light source system.
  • the structure of the color wheel 902 shown in Fig. 9 is different from the structure of the color wheel 1002 shown in Fig. 10.
  • the exit surface of the excited light and the incident surface of the excitation light are respectively located on both sides of the wavelength conversion material, and in the embodiment shown in FIG. 10, the exit surface and excitation of the excited light.
  • the incident surface of the light is located on the same side of the wavelength converting material, the former being called a transmissive color wheel and the latter being called a reflective color wheel.
  • the transmissive color wheel has a transparent or translucent base material that allows excitation light to penetrate and be incident on the optical wavelength converting material while at least a portion of the excited light can penetrate and exit.
  • the reflective color wheel is provided with a reflective layer on the other side of the excitation surface of the wavelength converting material, such as a mirror or an aluminum plate coated with a highly reflective silver film, so that the excited light emitted by the wavelength conversion material is all emitted from the excited side.
  • a reflective layer on the other side of the excitation surface of the wavelength converting material, such as a mirror or an aluminum plate coated with a highly reflective silver film, so that the excited light emitted by the wavelength conversion material is all emitted from the excited side.
  • transmissive color wheel and the reflective color wheel have different optical configurations, it can be seen by comparing the embodiments of Figures 9 and 10 that both can be used in the present invention. Further, the two may also be used in combination, that is, at least two incident lights incident on the same color wheel, one beam is transmissive and the other beam is reflective; correspondingly, the color wheel also exists simultaneously Transmissive transparent/translucent substrate and reflective reflective layer.
  • a problem with the fifth embodiment of the present invention as shown in FIG. 10 is that when it is desired to pass the setting When the astigmatism material on the color wheel 1002 scatters and reflects the incident blue light and obtains the scattered light, since the light scattering process does not change the wavelength emission of the light, the spectral filters 1003A and 1003C transmit through different wavelengths. And reflection to complete the separation of the incident and outgoing light, so the scattered light is not reflected by 1003A and 1003C, but is transmitted directly and cannot be collected by the collection system.
  • the sixth and seventh embodiments of the present invention solve this problem.
  • a sixth embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 1102, an optical path combining system 1103, and a driving device 1105.
  • the light source system of the present embodiment is different from the light source system shown in FIG. 10 in that the incident light 1101A is incident on the color wheel 1102 through the through hole on the spectral filter 1103A, and the scattering material disposed on the color wheel 1102 is not Scattering and reflection are performed with wavelength conversion to produce outgoing light in the form of scattered light.
  • the spectral filter 1103A reflects the outgoing light incident on the outer region of the through hole of the spectral filter 1103A in the form of scattered light to the spectral filter 1103B, thereby realizing the incident light. Separation from the exiting light in the form of most scattered light.
  • the emitted light is transmitted through the spectral filter 1103B.
  • the incident light 1101C is transmitted through the spectral filter 1103B and then incident on the color wheel 1102, and is wavelength-converted by the color wheel 1102 to generate another outgoing light.
  • the other outgoing light is reflected by the color wheel 1102 and further reflected by the spectral filter 1103B.
  • the supplemental light 1101B is transmitted through the spectral filters 1103A, 1103B to merge the optical paths with the two outgoing beams.
  • the incident light 1101A can be effectively guided to the color wheel 1102 through the through hole provided in the spectral filter 1103A, and the through hole of the spectral filter 1103A is passed through the spectral filter.
  • the area is smaller than 1/4 of the reflection area of the spectral filter 1103A.
  • the spectroscopic filter 1103A provided with through holes is also suitable for incident light and outgoing light that are wavelength-converted by the color wheel 1102.
  • the spectroscopic filter 1103A may be replaced by a mirror with a through hole or other suitable optical film.
  • a seventh embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 1202, an optical path combining system 1203, and a driving device 1205. Similar to the sixth embodiment, in the present embodiment, the expansion of the optical spread of the scattered light beam is also utilized to separate the incident light and the outgoing light in the form of most of the scattered light.
  • the light source system of this embodiment is the same as that shown in FIG. The difference in the light source system is that the incident light 1201 A is reflected by the mirror 1203A and then incident on the color wheel 1202, and is scattered and reflected by the astigmatism material disposed on the color wheel 1202 without wavelength conversion to generate scattered light. Form of the outgoing light.
  • the emitted light in the form of scattered light is emitted from the outside of the mirror 1203A, and is reflected by the spectral filter 1203B and transmitted through the spectral filter 1203C.
  • the incident light 1201C is transmitted through the spectral filter 1203C and then incident on the color wheel 1202, and is wavelength-converted by the color wheel 1202 to generate another outgoing light.
  • the other outgoing light is reflected by the color wheel 1202 and further reflected by the spectral filter 1203C.
  • the supplemental light 1201B is transmitted through the spectral filters 1203B and 1203C to merge the optical paths with the two outgoing beams.
  • the projected area of mirror 1203A on color wheel 1202 is less than 1/4 of the projected area of spectroscopic filter 1203B on color wheel 1202.
  • the combination of mirror 1203A and spectral filter 1203B is equally applicable to incident light that is wavelength converted by color wheel 1102 and outgoing light.
  • the spectroscopic filter 1203B may be replaced by a mirror or other suitable optical film.
  • the incident light is incident on the color wheel. Whether it is scattering or exciting the wavelength conversion material to generate the excited light, the emitted light beam is divergent. In practical applications, it is necessary to use a collimating lens or a lens group. Straighten and then merge with other light paths. Since this is a technical means commonly used in the art, in the schematic diagrams and descriptions of all embodiments of the present invention, the collimating lens or the lens group is not described and the collimated excitation light or scattered light is directly used, which does not limit the correlation. The use of optical originals.
  • the switching and luminous intensity of each optical path can be independently controlled.
  • the light emitted from the light source system of the present invention can be a sequence of monochromatic light due to the high-speed modulation of the semiconductor light source.
  • the monochromatic light sequence can be synchronized with a light valve (such as the DMD chip of the company) for projection display.
  • the light source corresponding to the red light is turned on in the red light monochromatic time period (excitation color wheel)
  • An excitation light source of the red wavelength conversion material, or a red light monochromatic supplement light source when the red light segment ends, the corresponding light source is turned off and the light source corresponding to the green light is turned on, analogy.
  • white light in order to increase the brightness of the projection, it is necessary to introduce white light into the monochromatic light sequence, such as red-green-blue-white-red-green-blue-white.
  • the corresponding light source is turned on while the other monochromatic light source is turned off, and when the time period of the white light starts, the red, green and blue colors are simultaneously turned on.
  • the corresponding light source, the three colors are combined by the optical path combining system to obtain white light, and when the white light period ends, the red light period is turned off, and the light source corresponding to the green light and the blue light is turned off, and the light source corresponding to the red light is kept. Open, and so on.
  • green light and red light can be turned on simultaneously to realize yellow light, and blue light and green light simultaneously turn on to realize cyan light, and blue light and red light simultaneously turn on to form purple red light, and red, green and blue light are simultaneously turned into half of full load. Get half the brightness of white light, etc., different control modes for different applications.
  • the present invention also provides a projection apparatus using any of the above-described light source systems.
  • the present invention can achieve continuous change of the color of the final emitted light in a specific color gamut in the CIE1931 gamut by independent control of each light source.
  • the color coordinates of each vertex of the color gamut are the color coordinates of the monochromatic light in each optical path in CIE1931.
  • the color coordinates of the combined mixed light can be changed; specifically, increasing the brightness of the monochromatic light in a certain optical path causes the color coordinates of the mixed light to be directed to the monochromatic light.
  • the direction of the color coordinates drifts, and decreasing the brightness of the monochromatic light causes the color coordinates of the mixed light to drift in the opposite direction of the color coordinates of the monochromatic light.
  • the present invention also provides a lighting device.
  • the illuminating device comprises at least two light sources, and the light emitted by the two light sources is incident on any one of the above-mentioned light source systems and the combined light of the optical paths is obtained as the outgoing light.
  • the emitted light can be directly used as an illumination source, or can be combined with a projection optical system or a collimating optical system at the rear end to obtain an illumination region of a specific shape, or a specific pattern on the pattern disc can be obtained in the target illumination region in accordance with the use of the pattern disc.
  • the illumination device can also obtain the emitted light of different colors, and the color of the emitted light can continuously change within a certain color gamut.

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

Abstract

L'invention concerne un système de source lumineuse, qui comprend une roue colorée (302, 502, 902, 1002, 1102, 1202) et un système de combinaison de trajet optique (303, 503, 903, 1003, 1103, 1203). La roue colorée (302, 502, 902, 1002, 1102, 1202) est utilisée pour recevoir au moins deux faisceaux de lumière incidente (301A,301B,301C,501A,501B,501C,901A,901C,1001A,1001C,1101A,1101C,1201A,1201C) en différentes positions et envoyer de manière correspondante au moins deux faisceaux de lumière émergente. Le système de combinaison de trajet optique (303, 503, 903, 1003, 1103, 1203) est utilisé pour combiner les au moins deux faisceaux de lumière émergente. La roue colorée (302, 502, 902, 1002, 1102, 1202) est dotée d'une première zone destinée à recevoir la première lumière incidente et convertir la longueur d'onde de la première lumière incidente, de manière à produire une première lumière émergente. Le système de source lumineuse peut être utilisé dans un équipement d'éclairage ou un appareil de projection. La structure ci-dessus du système de source lumineuse peut réduire le nombre de roues colorées et la taille du système de source lumineuse. Les coûts de production du système de source lumineuse peuvent être réduits.
PCT/CN2012/075643 2011-11-10 2012-05-17 Système de source lumineuse, équipement d'éclairage et appareil de projection Ceased WO2013067807A1 (fr)

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