WO2016091106A1 - 投影系统 - Google Patents

投影系统 Download PDF

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Publication number
WO2016091106A1
WO2016091106A1 PCT/CN2015/096214 CN2015096214W WO2016091106A1 WO 2016091106 A1 WO2016091106 A1 WO 2016091106A1 CN 2015096214 W CN2015096214 W CN 2015096214W WO 2016091106 A1 WO2016091106 A1 WO 2016091106A1
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WO
WIPO (PCT)
Prior art keywords
light
compensation
optical path
timing
projection system
Prior art date
Application number
PCT/CN2015/096214
Other languages
English (en)
French (fr)
Inventor
郭祖强
王则钦
Original Assignee
深圳市绎立锐光科技开发有限公司
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 深圳市绎立锐光科技开发有限公司 filed Critical 深圳市绎立锐光科技开发有限公司
Priority to JP2017507829A priority Critical patent/JP6393405B2/ja
Priority to US15/532,461 priority patent/US10168610B2/en
Publication of WO2016091106A1 publication Critical patent/WO2016091106A1/zh
Priority to US16/219,224 priority patent/US10466580B2/en

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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
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/10—Simultaneous recording or projection
    • G03B33/12—Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. 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
    • G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
    • 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
    • G03B21/2006—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
    • G03B21/2053—Intensity control of illuminating light
    • 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
    • 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
    • G03B33/10—Simultaneous recording or projection
    • G03B33/14—Simultaneous recording or projection using lenticular screens
    • 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
    • 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
    • H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
    • 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
    • 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
    • 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]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • 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]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3158—Modulator illumination systems for controlling the spectrum
    • 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]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • 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]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3164—Modulator illumination systems using multiple light sources
    • 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]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut

Definitions

  • the present invention relates to the field of optical technology, and more particularly to a projection system.
  • DLP Digital Micromirror Device
  • DLP projection technology is monolithic DMD. Projection system and three-chip DMD projection system.
  • a monolithic DMD projection system includes a light source 100, a collection lens 101, and a rotating color wheel 102. a square bar 103, an optical relay system 104, a DMD chip 105, a TIR prism 106, and a projection lens 107, wherein the light source 100 It is a semiconductor laser or a light emitting diode.
  • the excitation light emitted by the light source 100 passes through the collecting lens 101 and is focused onto the rotating color wheel 102, since the rotating color wheel 102 has red R, green G, blue B three phosphors, and different phosphors are located in different regions of the rotating color wheel 102, as shown in Fig. 2.
  • a red R, green with timing can be generated.
  • G, blue B three primary colors of light, the three primary colors of light sequentially pass through the square rod 103 and the optical relay system 104, are incident on the TIR prism 106, and are reflected by the TIR prism 106 to the DMD After modulation on the chip 105, the formed image is output from the projection lens 107.
  • each DMD modulates a primary color, such as the first DMD modulated red light.
  • R, the second DMD modulated green light G, the third DMD modulated blue light B, and then the three DMD modulated monochrome images are spatially superimposed to form a color image. That is, the existing DLP
  • the projection system whether it is a monolithic DMD projection system or a three-chip DMD projection system, uses a three-primary color principle to synthesize color images.
  • the color gamut of the above color image basically satisfies the standard of REC.709, as shown in FIG. 3, the color gamut coverage of the color image LP Most of the REC.709 gamut, however, this gamut does not completely cover the gamut of REC.709, ie some of the existing DLP projection systems still do not meet the REC.709 standard, and DCI Compared with the standard, there is more difference.
  • the present invention provides a projection system to solve DLP in the prior art.
  • the color image synthesized by the projection system has a small color gamut and cannot meet the problems of the REC.709 standard and the DCI standard.
  • a projection system comprising:
  • the two beams include a second light and a first compensation light;
  • a first light modulating device that modulates the light transmitted along the first optical path
  • a second light modulating device that modulates the light transmitted along the second optical path.
  • the first light is a primary light
  • the second light is a broad spectrum light comprising at least two primary colors
  • the combined light of the first light and the second light comprises three primary colors.
  • the spectrum of the first compensation light is between a spectrum range of the first light and a spectrum range of the second light, and a spectrum range of the first compensation light and the second light There is a partial overlap in the spectral range.
  • the spectroscopic device comprises a first prism and a second prism, and an interface of the first prism and the second prism has a beam splitting film.
  • the light source system comprises:
  • a first light source that emits the first light
  • Rotating the color wheel includes at least one fluorescent color segment and one transparent color segment for absorbing the first light and generating the second light.
  • the light source system further comprises:
  • a first control device that controls the second light source to be turned on at a first timing and turned off at a second timing such that the second light beam includes second light.
  • the first light and the first compensation light simultaneously form a first light beam through the transparent color segment.
  • the light source system comprises:
  • a first light source that emits the first light
  • a second light source that emits a first compensation light
  • the first rotating color wheel on the optical path of the first light, the first rotating color wheel comprising at least one fluorescent color segment and one transparent color segment, the fluorescent color segment for absorbing the first light and generating Second light
  • the second rotating color wheel located on the optical path of the second light, the second rotating color wheel being a transparent color wheel.
  • the light source system further comprises:
  • the second control device controlling the second light source to be turned on throughout the time sequence such that the second light beam includes the second light and the first compensation light; or the second control device controls the The second light source is turned on at a first timing and turned off at a second timing such that the second light beam includes a second light.
  • the light source system comprises:
  • a first light source that emits the first light
  • first rotating color wheel comprising at least a first fluorescent color segment and a second fluorescent color segment, the first fluorescent color segment for absorbing the first light and generating a second light, A second fluorescent color segment is for absorbing the first light and generating a first compensation light.
  • the first compensation light is narrow-spectrum light
  • the first light of the first light beam is transmitted along the first optical path
  • the first compensation light of the first light beam is transmitted along the second optical path
  • the spectroscopic device divides the first compensation light of the first light beam into a first portion of the first compensation light and a second portion of the first compensation light, and the first portion The first compensation light and the first light of the first light beam are simultaneously transmitted along the first optical path, and the second portion of the first compensation light is transmitted along the second optical path.
  • the spectroscopic device divides the second light in the second light beam into a third light and a fourth light, and the third light is transmitted along the first optical path, and the fourth light is transmitted along the second optical path;
  • the second light beam includes the first compensation light
  • the first compensation light and the fourth light are simultaneously transmitted along the second optical path.
  • the light source system further comprises:
  • a third light source that emits the second compensation light, the second compensation light and the third light are metachromatic light, and the second compensation light and the third light are simultaneously transmitted along the first optical path.
  • the light source system further comprises:
  • a third control device that controls the third light source to be turned off at a first timing and turned on at a second timing to cause the second compensation light to be generated simultaneously with the third light.
  • the first light is blue light
  • the third light is red light
  • the fourth light is green light
  • the first compensation light is cyan or green light or cyan light
  • the second compensation The light is red.
  • the first compensation light has a wavelength ranging from 510 nm to 530 nm; and the second compensation light has a wavelength range of 625nm ⁇ 645nm.
  • the light source system generates a first light beam at a first timing and a second light beam at a second timing, the first light beam including the first light and the first compensation light, and the second light beam including the second light, or a second light and a first compensation light;
  • the light splitting means sequentially splits the first light beam and the second light beam into light transmitted along the first light path and light transmitted along the second light path, so that the first light can be used to the first light or
  • the second light is compensated to expand the spectral range of the first light or the second light, so that the color gamut of the synthesized color image is wider and can satisfy Color gamut standards for REC.709 and DCI;
  • the projection system provided by the present invention uses two light modulating devices to respectively modulate light transmitted along the first optical path and light transmitted along the second optical path, and has higher light efficiency and brightness than a system using a single light modulating device. Compared with a system using three light modulation devices, the structure is simpler and the cost is lower.
  • Figure 1 is a schematic structural view of a conventional single-chip DMD projection system
  • FIG. 2 is a structural view of a region of a rotating color wheel in a conventional projection system
  • Figure 3 is a color gamut diagram of a color image formed by a conventional projection system
  • FIG. 4 is a schematic structural diagram of a projection system according to Embodiment 1 of the present invention.
  • FIG. 5 is a structural diagram of a region of a rotating color wheel according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic structural diagram of a light splitting device according to Embodiment 1 of the present invention.
  • FIG. 7 is a timing chart of modulation of a first light modulating device and a second light modulating device in Embodiment 1 of the present invention.
  • FIG. 8 is a color gamut diagram of a projection system according to Embodiment 1 of the present invention.
  • FIG. 9 is another structural diagram of a region of a rotating color wheel according to Embodiment 1 of the present invention.
  • FIG. 10 is a schematic structural diagram of another projection system according to Embodiment 1 of the present invention.
  • FIG. 11 is another timing chart of modulation of a first light modulating device and a second light modulating device according to Embodiment 1 of the present invention.
  • FIG. 12 is a color gamut diagram of another projection system according to Embodiment 1 of the present invention.
  • FIG. 13 is a schematic structural diagram of a projection system according to Embodiment 2 of the present invention.
  • FIG. 14 is a timing chart of modulation of a first light modulating device and a second light modulating device according to Embodiment 2 of the present invention.
  • FIG. 16 is a schematic structural diagram of a projection system according to Embodiment 3 of the present invention.
  • FIG. 17 is a timing chart of modulation of a first light modulating device and a second light modulating device in Embodiment 3 of the present invention.
  • FIG. 19 is still another timing chart of modulation of the first light modulating device and the second light modulating device in Embodiment 3 of the present invention.
  • the embodiment provides a projection system including a light source system, a light splitting device, a first light modulating device, and a second light modulating device.
  • the light source system generates a first light beam at a first timing and a second light beam at a second timing;
  • the light splitting device sequentially divides the first light beam and the second light beam into light transmitted along the first optical path and light transmitted along the second optical path.
  • the first light modulating device modulates light transmitted along the first optical path, and the second light modulating device modulates light transmitted along the second optical path.
  • the first light modulating device and the second light modulating device in this embodiment include, but are not limited to, DMD (Digital Micro Mirror) Device, digital micromirror device, LCOS (Liquid Crystal On Silicon) and LCD (Liquid Crystal) Display, LCD display).
  • DMD Digital Micro Mirror
  • LCOS Liquid Crystal On Silicon
  • LCD Liquid Crystal Display
  • the first light is primary light
  • the second light is broad spectrum light including at least two primary colors
  • the combined light of the first light and the second light includes three primary colors.
  • the spectral range of the first compensation light is between the spectral range of the first light and the spectral range of the second light, and the spectral range of the first compensation light partially overlaps with the spectral range of the second light.
  • the first light is blue light
  • the second light is yellow light including red light and green light
  • the first compensation light is cyan
  • the spectrum of the blue light is between the spectrum ranges of blue light and yellow light
  • the The spectral range of the cyan light partially overlaps with the spectral range of the yellow light, so that the cyan can compensate for the color gamut of the blue light and compensate the color gamut of the green light divided by the yellow light.
  • the light source system includes a first light source 401 that emits a first light ⁇ 1, a second light source 402 that emits a first compensation light ⁇ 2, an optical relay system 403, and a rotating color wheel 404.
  • the first light source 401 is a laser light source that emits blue light, and the wavelength of the blue light emitted is preferably 445 nm.
  • the second light source 402 is a laser light source that emits cyan light, and the emitted cyan light is a narrow spectrum light, and the wavelength is preferably 510 nm.
  • the first light source 401 and the second light source 402 may also be light emitting diodes, or the second light source 402 may also be a light source that emits cyan light in the 490 nm to 530 nm band, or may emit green light.
  • the light source, the present invention is not limited thereto as long as it can enlarge the color gamut of the synthesized color image.
  • the rotating color wheel 404 includes a fluorescent color section 4041 and a transparent color section 4042, wherein the fluorescent color section 4041 has a yellow fluorescent powder, and the transparent color section 4042 has a scattering powder, and the scattering powder is used. After depolarizing the blue light and the blue light, the light is emitted.
  • the rotating color wheel 404 has a driving device, such as a motor or the like, for driving the rotating color wheel 404 to rotate, so that the fluorescent color segment 4041 and the transparent color segment 4042 are sequentially rotated to the optical path of the first light ⁇ 1, or sequentially rotated to The optical path of the first compensation light ⁇ 2, wherein the transparent color segment 4042 can be simultaneously located on the optical paths of the first light ⁇ 1 and the first compensation light ⁇ 2 to form a first light beam ⁇ 4 including the first light ⁇ 1 and the first compensation light ⁇ 2 .
  • a driving device such as a motor or the like
  • the transparent color segment 4042 is rotated to the optical path of the first light ⁇ 1 and the first compensation light ⁇ 2, and the first light ⁇ 1 and the first compensation light ⁇ 2, that is, the blue light and the blue light are simultaneously transmitted through the transparent color.
  • a first light beam ⁇ 4 is formed;
  • the fluorescent color segment 4041 is rotated to the optical path of the first light ⁇ 1, and the fluorescent color segment 4041 absorbs the first light ⁇ 1 and generates a second light, that is, the second light beam ⁇ 3, that is, absorption. Blue light produces yellow light Y.
  • the spectroscopic device includes a first prism 410, a second prism 411, and is located at the first The prism film 410 and the second prism 411 intersect the light splitting film 412.
  • the light splitting film 412 is a transflective film, preferably having a green band pass characteristic.
  • the spectroscopic device divides the first light beam ⁇ 4 into a first light ⁇ 1 transmitted along the first optical path and a first compensation light ⁇ 2 transmitted along the second optical path at the first timing, that is, is divided into blue light B and blue.
  • Light C, and blue light B is transmitted along the first optical path to the first light modulating device 42, and the cyan light C is transmitted along the second optical path to the second light modulating device 43; the splitting device divides the second light beam ⁇ 3 into the second at the second timing
  • the third light ⁇ 30 transmitted by one optical path and the fourth light ⁇ 31 transmitted along the second optical path divide the yellow light Y into red light R and green light G, and the red light R is transmitted along the first optical path to the first light modulating device 42.
  • the green light G is transmitted to the second light modulation device 43 along the second optical path.
  • the first light modulating device 42 sequentially modulates the first light ⁇ 1 and the third light ⁇ 30, that is, the blue light B and the red light R
  • the second light modulating device 43 sequentially modulates the first compensation light ⁇ 2 and the fourth light ⁇ 31, that is, The cyan C and the green G, the modulated red light R, the green light G, the blue light B, and the cyan light C are projected through the projection lens 44.
  • the modulation timing chart of the first light modulation device 42 and the second light modulation device 43 is as shown in FIG.
  • the first light source 401 is always in an on state, and the second light source 402 is in an on state only when the transparent color segment 4042 is rotated to the optical path of the first compensation light ⁇ 2.
  • the light source system in this embodiment further includes first control means for controlling the second light source 402 to be turned on at the first timing, and being turned off at the second timing, that is, controlling the second light source 402 to rotate to the first compensation in the fluorescent color section 4041.
  • the light ⁇ 2 is turned off on the optical path, and is turned on when the transparent color segment 4042 is rotated to the optical path of the first compensation light ⁇ 2.
  • the color image LP formed by the projection system provided by the present embodiment is compared with the conventional method of synthesizing a color image by using the three primary color principle.
  • the color gamut is broader, as shown in Figure 8, covering the REC.709 standard and the DCI standard.
  • the fluorescent color section 4041 of the rotating color wheel 404 may also be a region having a red phosphor and a green phosphor. As shown in FIG. 9, the fluorescent color section 4041 includes a red fluorescent pink section. 40410 and green fluorescent pink section 40411.
  • the second light is a mixed light of the third light and the fourth light, that is, a mixed light of the red light R and the green light G, and the red light R and the green light G may have a timing or may be simultaneously generated.
  • the red fluorescent pink section 40410 and the green fluorescent pink section 40411 sequentially absorb the first light emitted by the same first light source.
  • the red fluorescent pink section 40410 is located on the optical path of the first light source during the first time period of the first timing, absorbs the first light and generates red light R;
  • the green fluorescent pink section 40411 is located at the first light source during the second time period of the first timing.
  • the light path absorbs the first light and produces green light G.
  • the green fluorescent pink section 40411 generates green light G during a first time period of the first timing
  • the red fluorescent pink color 40410 generates red light R during a second time period of the first timing.
  • the subsequent spectroscopic device also transmits the red light R to the first light modulating device according to the timing, and transmits the green light G to the second light modulating device, and the first light modulating device and the second light modulating device also modulate the red according to the timing.
  • Light R and green light G are examples of the red light modulating device according to the timing.
  • the red fluorescent pink section 40410 and the green fluorescent pink section 40411 simultaneously absorb the first light emitted by the different first light sources.
  • the red fluorescent pink section 40410 is located on the optical path of the corresponding first light source, and the green fluorescent pink section 40411 is also located on the optical path of the corresponding first light source, the red fluorescent pink section 40410 and the green fluorescent pink section 40411 can simultaneously The first light is absorbed while simultaneously generating the red light R and the green light G of the first timing.
  • the subsequent spectroscopic device also transmits the red light R and the green light G to the first light modulating device and the second light modulating device, respectively, and the first light modulating device and the second light modulating device also modulate the red light at the same time.
  • R and green G the projection system has higher light efficiency.
  • the light source system further includes a third light source 400, as shown in FIG. 10, the third light source 400 is configured to emit the second compensation light ⁇ 5, and the emitted second compensation light ⁇ 5 is incident on
  • the third light source 400 is a laser that emits red light
  • the red laser light that is, the second compensation light
  • the fluorescent color section 4041 is a region having a yellow fluorescent powder or a red fluorescent powder and a green fluorescent powder, the fluorescent color section 4041 can transmit the second compensation light ⁇ 5, and the fluorescent powder on the fluorescent color section 4041 can The red light of the polarization state is converted into the red light R1 of the non-polarization state.
  • the second compensation light ⁇ 5 and the third light ⁇ 40 are meta-spectral light, that is, the red light R1 and the red light R are isomerized light, and the red light R is compensated by the red light R1. Based on this, the second compensation light ⁇ 5 and the third light ⁇ 40 are simultaneously transmitted along the first optical path, and the first light modulating device 42 simultaneously modulates the second compensation light ⁇ 5 and the third light ⁇ 40.
  • the third light source 400 may be always in an open state, or may be in an open state only when the fluorescent color section 4041 is rotated to the optical path of the first light in order to save energy.
  • the light source system further includes third control means for controlling the third light source 400 to be turned off at the first timing, and to be turned on at the second timing, that is, to control the third light source 400 to rotate on the optical path of the first light ⁇ 1 when the fluorescent color section 4041 is rotated. Turned on, turning off when the transparent color segment 4042 is rotated to the optical path of the first light ⁇ 1.
  • the third control device is further configured to control the second compensation light ⁇ 5 and the third light ⁇ 40 to be generated simultaneously.
  • the spectroscopic device divides the first light beam ⁇ 4 into the first light ⁇ 1 and the first compensation light ⁇ 2, and transmits the first light ⁇ 1, that is, the blue light B, to the first light modulating device 42.
  • a compensation light ⁇ 2, that is, cyan C is transmitted to the second light modulating device 43; at the second timing, the second compensation light ⁇ 5 and the second light beam ⁇ 3 simultaneously reach the spectroscopic device, and the spectroscopic film 412 divides the second beam ⁇ 3 into red light R and
  • the green light G, the second compensation light ⁇ 5, that is, the red light R1 and the red light R are superimposed and then enter the first light modulating device 42, the green light G enters the second light modulating device 43, the first light modulating device 42 and the second light modulating device
  • the modulation timing diagram of 43 is shown in FIG.
  • the projection system provided by the embodiment can enlarge the color coordinates of the red light primary color and increase the red color.
  • the proportion of light, the expanded quadrilateral color gamut is shown in Figure 12.
  • the color image LP formed by the projection system provided by the embodiment has a wider color gamut and better meets the color gamut standards of REC.709 and DCI.
  • the projection system provided in this embodiment generates a first light beam at a first timing by a light source system, and generates a second light beam at a second timing, the first light beam includes a first light and a first compensation light, and the second light beam includes a second light;
  • the first light beam and the second light beam are sequentially divided by the light splitting device into light transmitted along the first optical path and light transmitted along the second optical path, so that the first light blue light can be compensated by the first compensation light blue light to expand the blue light.
  • the spectral range of the spectrum makes the color image of the synthesized color image wider, and can better meet the color gamut standards of REC.709 and DCI;
  • the projection system provided by the embodiment uses two light modulation devices to respectively modulate the light transmitted along the first optical path and the light transmitted along the second optical path, and the light effect and brightness are more than those of the system using a single light modulation device. High, the structure is simpler and the cost is lower than that of a system using three light modulation devices.
  • the present embodiment provides a projection system.
  • the projection system provided in this embodiment is substantially the same as the projection system provided in the first embodiment, and includes a light source system, a light splitting device, a first light modulating device, and a second light modulating device.
  • the light source system in this embodiment also includes a first light source 401 that emits the first light ⁇ 1 and a second light source 402 that emits the first compensation light ⁇ 2, and the first light source 401 is a laser light source that emits blue light, and the second light source 402
  • the first compensation light in this embodiment is a narrow spectrum of cyan light.
  • the projection system provided in this embodiment is different from the projection system provided in the first embodiment in that the light source system in this embodiment includes a first rotating color wheel 1300 on the optical path of the first light ⁇ 1 and a first compensation light.
  • the distribution of the fluorescent color segment and the transparent color segment is the same as that of the fluorescent color segment 4041 and the transparent color segment 4042 in FIG. 5, and details are not described herein again.
  • the fluorescent color segment on the first rotating color wheel 1300 absorbs the first light ⁇ 1 and generates the second light, that is, the absorption blue laser generates yellow light Y, and the transparent color segment transmits the first light ⁇ 1, that is, blue light, and the transparent color segment has scattering powder.
  • a blue light B used to convert blue light in a polarization state to an unpolarized state.
  • the fluorescent color segment may be a region having a yellow phosphor, such as the fluorescent color segment 4041 in FIG. 4, or may be a region having a red phosphor and a green phosphor, as shown in FIG.
  • the principle of the fluorescent pink section 40410 and the green fluorescent pink section 40411 is the same as that of the above embodiment, and details are not described herein again.
  • the second rotating color wheel 1301 is located on the optical path of the first compensation light ⁇ 2 for transmitting the first compensation light ⁇ 2, that is, the cyan C, and in the embodiment, the second rotating color wheel 1301 is a scattering wheel, and the scattering wheel
  • the scattering powder is capable of converting the polarization state of cyan into a non-polarized cyan C, wherein the first beam ⁇ 4 is a mixed beam of blue light B and cyan C.
  • the second control device controls the second light source 402 to be in an open state throughout the time sequence, that is, to control the second light source 402 to rotate on the optical path of the fluorescent color segment to the first light ⁇ 1 and the transparent color segment to the first compensation.
  • the light path of the light ⁇ 2 is always on, so that the second light beam ⁇ 3 includes the second light and the first compensation light, that is, the yellow light Y and the blue light C.
  • the second light modulating means 43 simultaneously modulates the green light G and the cyan light C which the yellow light Y is divided.
  • the modulation timing chart of the first light modulation device 42 and the second light modulation device 43 is as shown in FIG.
  • the second light source 402 may be in an on state only when the transparent color segment is rotated to the optical path of the first light ⁇ 1, and at this time, the second control device controls the second light source 402 at the first timing. Turned on, turned off at the second timing, that is, when the fluorescent color segment is rotated to the optical path of the first light, and turned on when the transparent color segment is rotated to the optical path of the first light, so that the second light beam includes the second light, but Does not include the first compensation light.
  • the second control device is further configured to control the simultaneous generation of the cyan C and the blue B, so that the blue light B modulated by the first light modulation device 42 and the blue light C modulated by the second light modulation device 43 are at the same timing, at this time,
  • a modulation timing chart of a light modulation device 42 and a second light modulation device 43 is referred to FIG.
  • the light source system further includes a third light source that emits second compensation light.
  • the third light source is a laser that emits red light
  • the second light source emits second compensation light.
  • the fluorescent color segment that may be incident on the first rotating color wheel 1300 may also be incident on the second rotating color wheel 1301, and the fluorescent color segment or the second rotating color wheel 1301 is configured to transmit the second compensation light, that is, the red light R1.
  • the red light of the polarization state is converted into the red light R1 of the non-polarization state.
  • the first light modulating device 42 is further configured to simultaneously modulate the red light R and the red light R1 to enlarge the color coordinates of the red light R by the red light R1, increase the ratio of the red light, and expand the color gamut of the synthesized color image.
  • the third light source may be always in an open state, or may be in an open state only when the fluorescent color segment is rotated to the optical path of the first light ⁇ 1 in order to save energy. Based on this, the third light source is further connected to the third control device, and the third light source is controlled by the third control device to be in an open state when the fluorescent color segment is rotated to the optical path of the first light, and to rotate to the first light in the transparent color segment. When the light path is off, the third light source is controlled to be turned off at the first timing and turned on at the second timing.
  • the modulation timing diagrams of the first light modulation device 42 and the second light modulation device 43 are as shown in FIG.
  • the first modulation device 42 modulates the blue light B
  • the second light modulation device 43 modulates the cyan C
  • the first light modulation device 42 simultaneously modulates the red light R and the red light R1
  • the second light modulation The device 43 simultaneously modulates the green light G and the cyan light C.
  • the first light beam is generated by the light source system at the first timing, and the second light beam is generated at the second timing, the first light beam includes the first light and the first compensation light, and the second light beam includes the second light. Or including the second light and the first compensation light; sequentially dividing the first light beam and the second light beam into light transmitted along the first optical path and light transmitted along the second optical path by the light splitting device, and sequentially passing the first light beam through the light splitting device And the second light beam is divided into the light transmitted along the first optical path and the light transmitted along the second optical path, so that the first compensation light, that is, the blue light, can be compensated for the first light, that is, the blue light, or the green light divided by the second light, In order to expand the spectral range of the first light or the second light, the color gamut of the synthesized color image is wider, and can meet the color gamut standards of REC.709 and DCI;
  • the projection system provided by the embodiment uses two light modulation devices to respectively modulate the light transmitted along the first optical path and the light transmitted along the second optical path, and the light effect and brightness are more than those of the system using a single light modulation device. High, the structure is simpler and the cost is lower than that of a system using three light modulation devices.
  • the present embodiment provides a projection system.
  • the projection system provided in this embodiment is substantially the same as the projection system provided in the first embodiment, and includes a light source system, a light splitting device, a first light modulating device, and a second light modulating device.
  • the difference is that, as shown in FIG. 16, the light source system in this embodiment includes a first light source 401 and a first rotating color wheel 1600.
  • the first light source 401 is for emitting the first light ⁇ 1.
  • the first light source 401 is a blue light emitting laser.
  • the first rotating color wheel 1600 includes a first fluorescent color segment and a second fluorescent color segment, wherein the first fluorescent color segment and the second fluorescent color segment are sequentially rotated to the optical path of the first light ⁇ 1, and the first fluorescent color segment is used for absorbing the first A light and a second light is generated, the second fluorescent color segment is for absorbing the first light and generating the first compensation light.
  • the difference between the first embodiment and the second embodiment is that the first compensation light, that is, the cyan light, is generated by the cyan laser, and the spectrum is narrow.
  • the first compensation light is fluorescent.
  • the powder is produced with a wide spectrum. Among them, a spectral range exceeding 10 nm or more is defined as a broad spectrum light compared to a narrow spectrum of a laser.
  • the first fluorescent color segment may be a region having a yellow fluorescent powder, such as the fluorescent color segment 4041 in FIG. 4, or the first fluorescent color segment may also be a region having a red fluorescent powder and a green fluorescent powder, such as The red fluorescent pink section 40410 and the green fluorescent pink section 40411 in FIG. 9 have the same working principle as the above embodiment, and are not described herein again.
  • the second fluorescent color section has a cyan phosphor. A region or a region having a green phosphor, wherein the green phosphor is cyan, and the dominant wavelength of the green light generated is between 510 nm and 530 nm.
  • the first fluorescent color segment absorbs the first light ⁇ 1 and generates a second light, that is, the absorption blue laser generates yellow light Y, and the second fluorescent color segment absorbs the first light. ⁇ 1 and produces a first compensation light ⁇ 7, that is, absorbing blue light to generate cyan C.
  • the second fluorescent color segment can also transmit the first light ⁇ 1, that is, blue light, and convert the blue light in the polarization state into the blue light B in the non-polarized state, while generating the cyan C.
  • the spectroscopic device splits the first compensation light into a first portion of the first compensation light transmitted along the first optical path and a second portion of the first compensation light transmitted along the second optical path at the first timing, that is, dividing the cyan C into the first portion of the cyan C1 and The second part is cyan C2, or divides the green light G into a first part of green light G1 and a second part of green light G2; at a second timing, the second light is divided into a third light transmitted along the first optical path and transmitted along the second optical path
  • the fourth light that is, the yellow light Y is divided into red light R and green light G.
  • the modulation timing chart of the first light modulating device 42 and the second light modulating device 43 is as shown in FIG. 17, the first light modulating device 42 modulates the blue light B and the first partial cyan C1 at the first timing, and the second light modulating device 43
  • the first timing modulates the second portion of the cyan C2; the first light modulating device 42 modulates the red light R at the second timing, and the second light modulating device 43 modulates the green light G at the second timing; so that the modulated blue light B, A part of the cyan C1, the second part of the cyan C2, the red R and the green G form a color image.
  • the modulation timing chart of the first light modulating device 42 and the second light modulating device 43 is as shown in FIG. 18.
  • the first light modulating device 42 is in the first a timing modulating the blue light B and the first portion of the green light G1, the second light modulating means 43 modulating the second portion of the green light G2 at the first timing; the first light modulating means 42 modulating the red light R at the second timing, the second light modulating means 43 modulates the green light G at the second timing.
  • the second fluorescent color wheel adopts a cyan fluorescent powder
  • the cyan light can be directly divided into two parts, that is, the first part is cyan C1 and the second part is cyan C2.
  • the spectroscopic film of the spectroscopic device may be a low pass coating or a band pass coating;
  • the second fluorescent color wheel adopts the green fluorescent powder
  • the spectrum of the generated light reaches the green light region and the specific gravity is relatively large
  • it is necessary to intercept the partial light portion that is, the portion having a wavelength of not more than 510 nm, that is,
  • the broad-spectrum green light is divided into two parts, that is, divided into a first part of green light G1 and a second part of green light G2, and the left part of the intercepted spectrum, that is, the first part of green light G1 and blue light is mixed to correct blue light, and the synthesized
  • the color gamut of the color image can also correct the green light to make it closer to the DCI color gamut.
  • the spectroscopic film of the spectroscopic device can only be a green band pass coating.
  • the light source system in this embodiment further includes a third light source for transmitting the second compensation light.
  • the first fluorescent color segment of the first rotating color wheel 1600 transmits the second compensation light.
  • the light source system may further include a second rotating color wheel to transmit the second compensation light through the second rotating color wheel while converting the red light of the polarization state into the non-polarized light.
  • the second light modulating means 43 simultaneously modulates the third light and the second compensation light, that is, simultaneously modulates the red light R and the red light R1.
  • the third light source 400 may be always in an open state, or may be in an open state only when the first fluorescent color segment is rotated to the optical path of the first light in order to save energy.
  • the light source system in this embodiment further includes a third control device connected to the third light source for controlling the third light source to be turned off at the first timing, The second timing is turned on, that is, when the first fluorescent color segment is rotated to the optical path of the first light, and is turned off when the second fluorescent color segment is rotated to the optical path of the first light.
  • the modulation timing charts of the first light modulation device 42 and the second light modulation device 43 are as shown in FIG.
  • the first light modulating device 42 simultaneously modulates the blue light B and the first partial green light G1 at the first timing, and the second light modulating device 43 modulates the second partial green light G2 at the first timing; the first light modulating device 42 simultaneously performs the second timing
  • the red light R and the red light R1 are modulated, and the second light modulating means 43 modulates the green light G at the second timing.
  • the first light beam is generated by the light source system at the first timing
  • the second light beam is generated at the second timing
  • the first light beam includes the first light and the first compensation light
  • the second light beam includes the second light.
  • the first light beam and the second light beam are sequentially divided by the light splitting device into light transmitted along the first optical path and light transmitted along the second optical path, so that blue light or green light or cyan light can be used to compensate the blue light to expand the blue light.
  • the color gamut which makes the color image of the synthesized color image wider, and can meet the color gamut standards of REC.709 and DCI;
  • the projection system provided by the embodiment uses two light modulation devices to respectively modulate the light transmitted along the first optical path and the light transmitted along the second optical path, and the light effect and brightness are more than those of the system using a single light modulation device. High, the structure is simpler and the cost is lower than that of a system using three light modulation devices.
  • the present embodiment provides a projection system.
  • the projection system provided in this embodiment is substantially the same as the projection system provided in the first embodiment, and includes a light source system, a light splitting device, a first light modulating device, and a second light modulating device.
  • the second light source 402 in this embodiment is a light emitting diode that emits cyan or green light
  • the first or second light source 402 emits cyan or green light, that is, the first compensation light is broad spectrum light.
  • the transparent color segment 4042 of the rotating color wheel 404 simultaneously transmits blue light and cyan light; and the light splitting device divides the first compensation light into the first portion at the first timing. Compensating the light and the second portion of the first compensation light, that is, dividing the cyan C into the first portion cyan C1 and the second portion cyan C2; and dividing the second light into the third light and the edge along the first optical path at the second timing.
  • the fourth light transmitted by the two optical paths divides the yellow light Y into red light R and green light G.
  • the modulation timing charts of the first light modulating device 42 and the second light modulating device 43 are as shown in FIG.
  • the blue light B and the first portion of the cyan C1 are modulated at the first timing, the second light modulating device 43 modulates the second portion of the cyan C2 at the first timing; the first light modulating device 42 modulates the red light R at the second timing, the second light Modulation device 43 modulates green light G at a second timing.
  • the cyan light can be directly divided into two parts, that is, the first part of the cyan C1 and the second part of the cyan C2, and the first part is blue.
  • the light C1 is mixed with the blue light to correct the blue light to be closer to the DCI color gamut.
  • the light splitting film of the light splitting device may be a low pass coating or a band pass coating;
  • the transparent color section 4042 of the rotating color wheel 404 simultaneously transmits blue light and green light; the light splitting device divides the green light into the first part of the green light G1 and the second part of the green at the first timing.
  • Light G2; yellow light Y is divided into red light R and green light G at the second timing.
  • the modulation timing chart of the first light modulating device 42 and the second light modulating device 43 is as shown in FIG. 18.
  • the first light modulating device 42 modulates the blue light B and the first partial green light G1 at the first timing, and the second light modulating device 43
  • the first timing modulates the second portion of green light G2; the first light modulating device 42 modulates the red light R at the second timing, and the second light modulating device 43 modulates the green light G at the second timing.
  • the light generated by the second light source 402 since the light generated by the second light source 402 has a relatively large specific gravity in the green light region, it is necessary to intercept the portion of the partial cyan light, that is, the wavelength not exceeding 510 nm, that is, to divide the broad spectrum green light into two parts, That is, the first part of the green light G1 and the second part of the green light G2 are divided, and the left part of the intercepted spectrum, that is, the first part of the green light G1 and the blue light are mixed to correct the blue light, and the color gamut of the synthesized color image is enlarged, and at the same time, The second part of the green light G2 corrects the green light to make it closer to the DCI color gamut.
  • the spectroscopic film of the spectroscopic device can only be a green band pass coating.
  • the first light beam is generated by the light source system at the first timing
  • the second light beam is generated at the second timing
  • the first light beam includes the first light and the first compensation light
  • the second light beam includes the second light.
  • the first light beam and the second light beam are sequentially divided by the light splitting device into light transmitted along the first optical path and light transmitted along the second optical path, so that blue light or green light can be used to compensate the blue light to expand the color gamut of the blue light.
  • the projection system provided by the embodiment uses two light modulation devices to respectively modulate the light transmitted along the first optical path and the light transmitted along the second optical path, and the light effect and brightness are more than those of the system using a single light modulation device. High, the structure is simpler and the cost is lower than that of a system using three light modulation devices.

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Abstract

一种投影系统，包括：在第一时序产生第一光束（λ4），在第二时序产生第二光束（λ3）的光源系统，所述第一光束（λ4）包括第一光（λ1）和第一补偿光（λ2），所述第二光束（λ3）包括第二光，或者所述第二光束包括第二光和第一补偿光；依序将所述第一光束（λ4）和第二光束（λ3）分成沿第一光路传输的光和沿第二光路传输的光的分光装置；调制所述沿第一光路传输的光的第一光调制装置（42）；调制所述沿第二光路传输的光的第二光调制装置（43）。用第一补偿光对第一光或第二光进行补偿使得合成的彩色图像的色域更宽广。

Description

投影系统 技术领域
本发明涉及光学技术领域，更具体地说，涉及一种投影系统。
背景技术
目前，基于 DMD （ Digital Micromirror Device ，数字微镜器件）的 DLP （ Digital Light Procession ，数字光处理）投影技术已经得到越来越广泛的应用。其中，应用最普遍的 DLP 投影系统为单片式 DMD 投影系统和三片式 DMD 投影系统。
技术问题
单片式 DMD 投影系统，如图 1 所示，包括光源 100 、收集透镜 101 、旋转色轮 102 、方棒 103 、光中继系统 104 、 DMD 芯片 105 、 TIR 棱镜 106 和投影镜头 107 ，其中，光源 100 为半导体激光器或发光二极管。光源 100 发射的激发光经过收集透镜 101 后，聚焦到旋转色轮 102 上，由于旋转色轮 102 具有红 R 、绿 G 、蓝 B 三种荧光粉，且不同荧光粉位于旋转色轮 102 的不同区域，如图 2 所示，因此，激发光入射到旋转色轮 102 的不同区域后，能够产生具有时序的红 R 、绿 G 、蓝 B 三基色光，三基色光依次经过方棒 103 以及光中继系统 104 后入射到 TIR 棱镜 106 上，被 TIR 棱镜 106 反射到 DMD 芯片 105 上进行调制后，形成的图像从投影镜头 107 输出。
上述单片式 DMD 投影系统中，红 R 、绿 G 、蓝 B 三基色光是按时序依次入射到 DMD105 上进行调制，然后通过人眼的积分效应将调制后的单色图像合成彩色图像。而三片式 DMD 投影系统中，则是每个 DMD 调制一种基色光，如第一个 DMD 调制红光 R 、第二个 DMD 调制绿光 G 、第三个 DMD 调制蓝光 B ，然后将这三个 DMD 调制后的单色图像空间叠加合成彩色图像。也就是说，现有的 DLP 投影系统，无论是单片式 DMD 投影系统，还是三片式 DMD 投影系统，采用的都是三基色原理来合成彩色图像。
虽然上述彩色图像的色域基本满足了 REC.709 的标准，如图 3 所示，彩色图像 LP 的色域覆盖 REC.709 色域的大部分，但是，该色域并未完全覆盖 REC.709 的色域，即现有的 DLP 投影系统仍有部分未达到 REC.709 的标准，与 DCI 标准相比，则相差更多。
 技术解决方案
有鉴于此，本发明提供了一种投影系统，以解决现有技术中 DLP 投影系统合成的彩色图像的色域较小，不能满足 REC.709 标准和 DCI 标准的问题。
为实现上述目的，本发明提供如下技术方案：一种投影系统，包括：
在第一时序产生第一光束，在第二时序产生第二光束的光源系统，所述第一光束包括第一光和第一补偿光，所述第二光束包括第二光，或者所述第二光束包括第二光和第一补偿光；
依序将所述第一光束和第二光束分成沿第一光路传输的光和沿第二光路传输的光的分光装置；
调制所述沿第一光路传输的光的第一光调制装置；
调制所述沿第二光路传输的光的第二光调制装置。
优选的，所述第一光为基色光，所述第二光为包括至少两种基色光的宽谱光，且所述第一光与所述第二光的合光包含三基色光。
优选的，所述第一补偿光的波谱范围介于所述第一光的波谱范围与所述第二光的波谱范围之间，且所述第一补偿光的波谱范围与所述第二光的波谱范围存在部分重叠。
优选的，所述分光装置包括第一棱镜和第二棱镜，所述第一棱镜和第二棱镜的交界面具有分光膜。
优选的，所述光源系统包括：
发射第一光的第一光源；
发射第一补偿光的第二光源；
旋转色轮，所述旋转色轮至少包括一个荧光色段和一个透明色段，所述荧光色段用于吸收所述第一光并产生第二光。
优选的，所述光源系统还包括：
第一控制装置，所述第一控制装置控制所述第二光源在第一时序开启，在第二时序关闭，以使所述第二光束包括第二光。
优选的，在第一时序，所述第一光和第一补偿光同时透过所述透明色段形成第一光束。
优选的，所述光源系统包括：
发射第一光的第一光源；
发射第一补偿光光的第二光源；
位于所述第一光的光路上的第一旋转色轮，所述第一旋转色轮至少包括一个荧光色段和一个透明色段，所述荧光色段用于吸收所述第一光并产生第二光；
位于所述第二光的光路上的第二旋转色轮，所述第二旋转色轮为透明色轮。
优选的，所述光源系统还包括：
第二控制装置，所述第二控制装置控制所述第二光源在整个时序内开启，以使所述第二光束包括第二光和第一补偿光；或者所述第二控制装置控制所述第二光源在第一时序开启，在第二时序关闭，以使所述第二光束包括第二光。
优选的，所述光源系统包括：
发射第一光的第一光源；
第一旋转色轮，所述第一旋转色轮至少包括第一荧光色段和第二荧光色段，所述第一荧光色段用于吸收所述第一光并产生第二光，所述第二荧光色段用于吸收所述第一光并产生第一补偿光。
优选的，当所述第一补偿光为窄谱光时，所述第一光束中的第一光沿第一光路传输，所述第一光束中的第一补偿光沿第二光路传输；
当所述第一补偿光为宽谱光时，所述分光装置将所述第一光束中的第一补偿光分成第一部分第一补偿光和第二部分第一补偿光，且所述第一部分第一补偿光和所述第一光束中的第一光同时沿第一光路传输，所述第二部分第一补偿光沿第二光路传输。
优选的，所述分光装置将所述第二光束中的第二光分成第三光和第四光，且所述第三光沿第一光路传输，所述第四光沿第二光路传输；当所述第二光束包括第一补偿光时，所述第一补偿光与所述第四光同时沿第二光路传输。
优选的，所述光源系统还包括：
发射第二补偿光的第三光源，所述第二补偿光与所述第三光为同色异谱的光，且所述第二补偿光与所述第三光同时沿第一光路传输。
优选的，所述光源系统还包括：
第三控制装置，所述第三控制装置控制所述第三光源在第一时序关闭，在第二时序开启，以使所述第二补偿光与所述第三光同时产生。
优选的，所述第一光为蓝光，所述第三光为红光，所述第四光为绿光；所述第一补偿光为青光或绿光或青绿光；所述第二补偿光为红光。
优选的，所述第一补偿光的波长范围为 510nm~530nm ；所述第二补偿光的波长范围为 625nm~645nm 。
 有益效果
与现有技术相比，本发明所提供的技术方案具有以下优点：
本发明提供的投影系统，光源系统在第一时序产生第一光束，在第二时序产生第二光束，第一光束包括第一光和第一补偿光，第二光束包括第二光，或者包括第二光和第一补偿光；分光装置依序将第一光束和第二光束分成沿第一光路传输的光和沿第二光路传输的光，从而可以采用第一补偿光对第一光或第二光进行补偿，扩大了第一光或第二光的波谱范围，使得合成的彩色图像的色域更宽广，能够满足 REC.709 和 DCI 的色域标准；
并且，本发明提供的投影系统，采用两个光调制装置分别调制沿第一光路传输的光和沿第二光路传输的光，与采用单个光调制装置的系统相比，光效和亮度更高，与采用三个光调制装置的系统相比，结构更简单，成本更低。
 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图 1 为现有单片 DMD 投影系统的结构示意图；
图 2 为现有投影系统中旋转色轮的区域结构图；
图 3 为现有投影系统形成的彩色图像的色域图；
图 4 为本发明实施例一提供的一种投影系统的结构示意图；
图 5 为本发明实施例一提供的旋转色轮的区域结构图；
图 6 为本发明实施例一提供的分光装置的结构示意图；
图 7 为本发明实施例一中第一光调制装置和第二光调制装置的一种调制时序图；
图 8 为本发明实施例一提供的一种投影系统的色域图；
图 9 为本发明实施例一提供的旋转色轮的另一种区域结构图；
图 10 为本发明实施例一提供的另一种投影系统的结构示意图；
图 11 为本发明实施例一中第一光调制装置和第二光调制装置的另一种调制时序图；
图 12 为本发明实施例一提供的另一种投影系统的色域图；
图 13 为本发明实施例二提供的投影系统结构示意图；
图 14 为本发明实施例二中第一光调制装置和第二光调制装置的一种调制时序图；
图 15 为本发明实施例二中第一光调制装置和第二光调制装置的另一种调制时序图；
图 16 为本发明实施例三提供的投影系统结构示意图；
图 17 为本发明实施例三中第一光调制装置和第二光调制装置的一种调制时序图；
图 18 为本发明实施例三中第一光调制装置和第二光调制装置的另一种调制时序图；
图 19 为本发明实施例三中第一光调制装置和第二光调制装置的又一种调制时序图。
 本发明的最佳实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一
本实施例提供了一种投影系统，包括光源系统、分光装置、第一光调制装置和第二光调制装置。其中，光源系统在第一时序产生第一光束，在第二时序产生第二光束；分光装置依序将第一光束和第二光束分成沿第一光路传输的光和沿第二光路传输的光；第一光调制装置调制沿第一光路传输的光，第二光调制装置调制沿第二光路传输的光。
本实施例中的第一光调制装置和第二光调制装置包括但不限于DMD（Digital Micro mirror Device，数字微镜器件）、LCOS （Liquid Crystal On Silicon，硅基液晶显示器）和LCD（Liquid Crystal Display，液晶显示器）。为了描述方便，本实施例以及后续实施例中的光调制装置主要以DMD的调制方式进行描述。
本实施例中，优选的，第一光为基色光，第二光为包括至少两种基色光的宽谱光，第一光与第二光的合光包含三基色光。进一步地，第一补偿光的波谱范围介于第一光的波谱范围与第二光的波谱范围之间，且第一补偿光的波谱范围与第二光的波谱范围存在部分重叠。例如，第一光为蓝光，第二光为包括红光和绿光的黄光，第一补偿光为青光，该青光的波谱范围介于蓝光和黄光的波谱范围之间，且该青光的波谱范围与黄光的波谱范围存在部分重叠，这样该青光既能够补偿蓝光的色域，又能补偿黄光分成的绿光的色域。
本实施例中，如图4所示，光源系统包括发射第一光λ1的第一光源401、发射第一补偿光λ2的第二光源402、光中继系统403和旋转色轮404。其中，第一光源401为发射蓝光的激光光源，其发射的蓝光的波长优选为445nm，第二光源402为发射青光的激光光源，其发射的青光为窄光谱的光，波长优选为510nm，当然，在其他实施例中，第一光源401和第二光源402还可以为发光二极管，或者第二光源402还可以为发射490nm~530nm波段的青绿光的光源，也可以为发射绿光的光源，本发明并不仅限于此，只要其能够扩大合成的彩色图像的色域即可。
本实施例中，如图5所示，旋转色轮404包括荧光色段4041和透明色段4042，其中，荧光色段4041具有黄光荧光粉，透明色段4042具有散射粉，该散射粉用于将蓝光和青光消偏振后出射。并且，旋转色轮404具有驱动装置，如马达等，用于驱动旋转色轮404旋转，使荧光色段4041和透明色段4042依序旋转至第一光λ1的光路上，或依序旋转至第一补偿光λ2的光路上，其中，透明色段4042能够同时位于第一光λ1和第一补偿光λ2的光路上，以形成包含第一光λ1和第一补偿光λ2的第一光束λ4。
本实施例中，在第一时序，透明色段4042旋转至第一光λ1和第一补偿光λ2的光路上，第一光λ1和第一补偿光λ2即蓝光和青光同时透过透明色段4042后形成第一光束λ4；在第二时序，荧光色段4041旋转至第一光λ1的光路上，荧光色段4041吸收第一光λ1并产生第二光即第二光束λ3，即吸收蓝光产生黄光Y。
之后，第一光束λ4或第二光束λ3经过方棒405、光中继系统406和TIR棱镜407进入分光装置，本实施例中，分光装置包括第一棱镜410、第二棱镜411和位于第一棱镜410和第二棱镜411交界面的分光膜412，该分光膜412为半透半反膜片，优选为绿光带通特性。
具体地，如图6所示，分光装置在第一时序将第一光束λ4分成沿第一光路传输的第一光λ1和沿第二光路传输的第一补偿光λ2，即分成蓝光B和青光C，并且，蓝光B沿第一光路传输至第一光调制装置42，青光C沿第二光路传输至第二光调制装置43；分光装置在第二时序将第二光束λ3分成沿第一光路传输的第三光λ30和沿第二光路传输的第四光λ31，即将黄光Y分成红光R和绿光G，并且，红光R沿第一光路传输至第一光调制装置42，绿光G沿第二光路传输至第二光调制装置43。
第一光调制装置42依序调制所述第一光λ1和第三光λ30，即蓝光B和红光R，第二光调制装置43依序调制第一补偿光λ2和第四光λ31，即青光C和绿光G，调制后的红光R、绿光G、蓝光B和青光C通过投影镜头44进行投影。其中，第一光调制装置42和第二光调制装置43的调制时序图如图7所示。
本实施例中，第一光源401一直处于开启状态，而第二光源402仅在透明色段4042旋转至第一补偿光λ2的光路上时处于开启状态。即本实施例中的光源系统还包括第一控制装置，用于控制第二光源402在第一时序开启，在第二时序关闭，即控制第二光源402在荧光色段4041旋转至第一补偿光λ2的光路上时关闭，在透明色段4042旋转至第一补偿光λ2的光路上时开启。
由于本实施例中采用的是红绿蓝三基色光和补偿光合成彩色图像，因此，与现有的采用三基色原理合成彩色图像的方式相比，本实施例提供的投影系统形成的彩色图像LP的色域更加宽广，如图8所示，能够覆盖REC.709标准和DCI标准。
在本发明的其他实施例中，旋转色轮404的荧光色段4041还可以为具有红光荧光粉和绿光荧光粉的区域，如图9所示，荧光色段4041包括红光荧光粉色段40410和绿光荧光粉色段40411。此时，第二光为第三光和第四光的混合光，即红光R和绿光G的混合光，并且，红光R和绿光G可以具有时序，也可以同时产生。
当红光R和绿光G具有时序时，红光荧光粉色段40410和绿光荧光粉色段40411依次吸收同一个第一光源发射的第一光。红光荧光粉色段40410在第一时序的第一时段位于第一光源的光路上，吸收第一光并产生红光R；绿光荧光粉色段40411在第一时序的第二时段位于第一光源的光路上，吸收第一光并产生绿光G。或者，绿光荧光粉色段40411在第一时序的第一时段产生绿光G，红光荧光粉色段40410在第一时序的第二时段产生红光R。而后续的分光装置也会按照时序将红光R传输至第一光调制装置，将绿光G传输至第二光调制装置，第一光调制装置和第二光调制装置也会按照时序调制红光R和绿光G。
当红光R和绿光G同时产生时，红光荧光粉色段40410和绿光荧光粉色段40411同时吸收不同的第一光源发射的第一光。当红光荧光粉色段40410位于对应的第一光源的光路上，绿光荧光粉色段40411也位于对应的第一光源的光路上时，红光荧光粉色段40410和绿光荧光粉色段40411就可以同时吸收第一光，同时产生第一时序的红光R和绿光G。而后续的分光装置也会同时将红光R和绿光G分别传输至第一光调制装置和第二光调制装置，第一光调制装置和第二光调制装置也会在同一时段调制红光R和绿光G，此种投影系统的光效较高。
此外，在本发明的其他实施例中，上述光源系统还包括第三光源400，如图10所示，第三光源400用于发射第二补偿光λ5，且发射的第二补偿光λ5入射到荧光色段4041上，优选的，第三光源400为发射红光的激光器，所述红激光即第二补偿光的波长范围为625nm~645nm。由于荧光色段4041为具有黄光荧光粉或具有红光荧光粉和绿光荧光粉的区域，因此，荧光色段4041可以透射第二补偿光λ5，并且，荧光色段4041上的荧光粉能够将偏振态的红光转换为非偏振态的红光R1。
其中，第二补偿光λ5与第三光λ40为同色异谱的光，即红光R1与红光R为同色异谱的光，以通过红光R1对红光R进行补偿。基于此，第二补偿光λ5与第三光λ40同时沿第一光路传输，且第一光调制装置42同时调制第二补偿光λ5与第三光λ40。
本实施例中，第三光源400可以一直处于开启状态，也可以为了节约能源，仅在荧光色段4041旋转至第一光的光路上时处于开启状态。上述光源系统还包括第三控制装置，用于控制第三光源400在第一时序关闭，在第二时序开启，即控制第三光源400在荧光色段4041旋转至第一光λ1的光路上时开启，在透明色段4042旋转至第一光λ1的光路上时关闭。优选的，第三控制装置还用于控制第二补偿光λ5与第三光λ40同时产生。
如图10所示，在第一时序，分光装置将第一光束λ4分成第一光λ1和第一补偿光λ2，并将第一光λ1即蓝光B传输至第一光调制装置42，将第一补偿光λ2即青光C传输至第二光调制装置43；在第二时序，第二补偿光λ5和第二光束λ3同时到达分光装置，分光膜412将第二光束λ3分成红光R和绿光G，第二补偿光λ5即红光R1与红光R叠加后进入第一光调制装置42，绿光G进入第二光调制装置43，第一光调制装置42和第二光调制装置43的调制时序图如图11所示。
由于形成彩色图像的红光不仅包括旋转色轮产生的红光R，还包括第三光源400产生的红激光R1，因此，本实施例提供的投影系统能够扩大红光基色的色坐标，提高红光的比例，其扩大后的四边形色域如图12所示。与实施例一和实施例二相比，本实施例提供的投影系统形成的彩色图像LP的色域更广，更能满足REC.709和DCI的色域标准。
本实施例提供的投影系统，通过光源系统在第一时序产生第一光束，在第二时序产生第二光束，第一光束包括第一光和第一补偿光，第二光束包括第二光；通过分光装置依序将第一光束和第二光束分成沿第一光路传输的光和沿第二光路传输的光，从而可以采用第一补偿光青光对第一光蓝光进行补偿，以扩大蓝光的波谱范围，使得合成的彩色图像的色域更宽广，更能够满足REC.709和DCI的色域标准；
并且，本实施例提供的投影系统，采用两个光调制装置分别调制沿第一光路传输的光和沿第二光路传输的光，与采用单个光调制装置的系统相比，光效和亮度更高，与采用三个光调制装置的系统相比，结构更简单，成本更低。
实施例二
本实施例提供了一种投影系统，本实施例提供的投影系统与实施例一提供的投影系统的结构大体相同，均包括光源系统、分光装置、第一光调制装置和第二光调制装置，并且，本实施例中的光源系统也包括发射第一光λ1的第一光源401和发射第一补偿光λ2的第二光源402，且第一光源401为发射蓝光的激光光源，第二光源402为发射青光的激光光源，同样，本实施例中的第一补偿光为窄光谱的青光。
本实施例提供的投影系统与实施例一提供的投影系统的不同之处在于，本实施例中的光源系统包括位于第一光λ1的光路上的第一旋转色轮1300和位于第一补偿光λ2的光路上的第二旋转色轮1301，如图13所示，第一旋转色轮1300至少包括一个荧光色段和一个透明色段，荧光色段和透明色段依序旋转至第一光λ1的光路上，其中，荧光色段和透明色段的分布情况与图5中荧光色段4041和透明色段4042的分布情况相同，在此不再赘述。
第一旋转色轮1300上的荧光色段吸收第一光λ1并产生第二光，即吸收蓝激光产生黄光Y，透明色段透射第一光λ1即蓝光，该透明色段具有散射粉，用于将偏振态的蓝光转换为非偏振态的蓝光B。本实施例中，荧光色段可以为具有黄光荧光粉的区域，如图4中的荧光色段4041，也可以为具有红光荧光粉和绿光荧光粉的区域，如图9中红光荧光粉色段40410和绿光荧光粉色段40411，其原理也与上述实施例相同，在此不再赘述。
第二旋转色轮1301位于第一补偿光λ2的光路上，用于透射第一补偿光λ2即青光C，并且，本实施例中第二旋转色轮1301为散射轮，该散射轮上的散射粉能够将偏振态的青光转换为非偏振态的青光C，其中，第一光束λ4为蓝光B和青光C的混合光束。
本实施例中，第二控制装置控制第二光源402在整个时序内处于开启状态，即控制第二光源402在荧光色段旋转至第一光λ1的光路上和透明色段旋转至第一补偿光λ2的光路上时均处于开启状态，以使第二光束λ3包括第二光和第一补偿光，即黄光Y和青光C。这种情况下，第二光调制装置43同时调制黄光Y分成的绿光G和青光C。第一光调制装置42和第二光调制装置43的调制时序图如图14所示。
在其他实施例中，为了节约能源，第二光源402可以仅在透明色段旋转至第一光λ1的光路上时处于开启状态，此时，第二控制装置控制第二光源402在第一时序开启，在第二时序关闭，即在荧光色段旋转至第一光的光路上时关闭，在透明色段旋转至第一光的光路上时开启，以使第二光束包括第二光，但不包括第一补偿光。并且，第二控制装置还用于控制青光C和蓝光B同时产生，以便第一光调制装置42调制的蓝光B和第二光调制装置43调制的青光C处于同一时序，此时，第一光调制装置42和第二光调制装置43的调制时序图参照图7。
此外，在本发明的其他实施例中，上述光源系统还包括发射第二补偿光的第三光源，优选的，第三光源为发射红光的激光器，其中，第三光源发射的第二补偿光可以入射到第一旋转色轮1300的荧光色段，也可以入射到第二旋转色轮1301上，该荧光色段或第二旋转色轮1301用于透射该第二补偿光即红光R1，并将偏振态的红光转换为非偏振态的红光R1。此外，第一光调制装置42还用于同时调制红光R和红光R1，以通过红光R1扩大红光R的色坐标，提高红光的比例，扩大合成的彩色图像的色域。
其中，第三光源可以一直处于开启状态，也可以为了节约能源，仅在荧光色段旋转至第一光λ1的光路上时处于开启状态。基于此，第三光源还与第三控制装置相连，通过第三控制装置控制第三光源在荧光色段旋转至第一光的光路上时处于开启状态，在透明色段旋转至第一光的光路上时处于关闭状态，即控制第三光源在第一时序关闭，在第二时序开启。
当第二光源402在整个时序内处于开启状态，而第三光源仅在第二时序处于开启状态时，第一光调制装置42和第二光调制装置43的调制时序图如图15所示。在第一时序，第一调制装置42调制蓝光B，第二光调制装置43调制青光C；在第二时序，第一光调制装置42同时调制红光R和红光R1，第二光调制装置43同时调制绿光G和青光C。
本实施例提供的投影系统，通过光源系统在第一时序产生第一光束，在第二时序产生第二光束，第一光束包括第一光和第一补偿光，第二光束包括第二光，或者包括第二光和第一补偿光；通过分光装置依序将第一光束和第二光束分成沿第一光路传输的光和沿第二光路传输的光，通过分光装置依序将第一光束和第二光束分成沿第一光路传输的光和沿第二光路传输的光，从而可以采用第一补偿光即青光对第一光即蓝光，或对第二光分成的绿光进行补偿，以扩大第一光或第二光的波谱范围，使得合成的彩色图像的色域更宽广，能够满足REC.709和DCI的色域标准；
并且，本实施例提供的投影系统，采用两个光调制装置分别调制沿第一光路传输的光和沿第二光路传输的光，与采用单个光调制装置的系统相比，光效和亮度更高，与采用三个光调制装置的系统相比，结构更简单，成本更低。
实施例三
本实施例提供了一种投影系统，本实施例提供的投影系统与实施例一提供的投影系统的结构大体相同，均包括光源系统、分光装置、第一光调制装置和第二光调制装置，其不同之处在于，如图16所示，本实施例中的光源系统包括第一光源401和第一旋转色轮1600。
第一光源401用于发射第一光λ1，优选的，第一光源401为发射蓝光的激光器。第一旋转色轮1600包括第一荧光色段和第二荧光色段，第一荧光色段和第二荧光色段依次旋转至第一光λ1的光路上，第一荧光色段用于吸收第一光并产生第二光，第二荧光色段用于吸收第一光并产生第一补偿光。
与实施例一和实施例二的不同之处还在于，上述实施例中第一补偿光即青光是通过青激光器产生的，光谱较窄，而本实施例中，第一补偿光是由荧光粉产生的，光谱较宽。其中，与激光的窄光谱相比，光谱范围超过10nm以上的即定义为宽谱光。
其中，第一荧光色段可以为具有黄光荧光粉的区域，如图4中的荧光色段4041，或第一荧光色段也可以为具有红光荧光粉和绿光荧光粉的区域，如图9中红光荧光粉色段40410和绿光荧光粉色段40411，其工作原理也与上述实施例相同，在此不再赘述；本实施例中，第二荧光色段为具有青光荧光粉的区域或具有绿光荧光粉的区域，其中，绿光荧光粉偏青色，其产生的绿光的主波长在510nm~530nm之间。
当第二荧光色段为具有青光荧光粉的区域时，第一荧光色段吸收第一光λ1并产生第二光，即吸收蓝激光产生黄光Y，第二荧光色段吸收第一光λ1并产生第一补偿光λ7，即吸收蓝光产生青光C。其中，第二荧光色段还可以在产生青光C的同时，透射第一光λ1即蓝光，并将偏振态的蓝光转换为非偏振态的蓝光B。分光装置在第一时序将第一补偿光分成沿第一光路传输的第一部分第一补偿光和沿第二光路传输的第二部分第一补偿光，即将青光C分成第一部分青光C1和第二部分青光C2，或将绿光G分成第一部分绿光G1和第二部分绿光G2；在第二时序将第二光分成沿第一光路传输的第三光和沿第二光路传输的第四光，即将黄光Y分成红光R和绿光G。
第一光调制装置42和第二光调制装置43的调制时序图如图17所示，第一光调制装置42在第一时序调制蓝光B和第一部分青光C1，第二光调制装置43在第一时序调制第二部分青光C2；第一光调制装置42在第二时序调制红光R，第二光调制装置43在第二时序调制绿光G；以使调制后的蓝光B、第一部分青光C1、第二部分青光C2、红光R和绿光G合成彩色图像。
当第二荧光色轮为具有绿光荧光粉的区域时，第一光调制装置42和第二光调制装置43的调制时序图如图18所示，同理，第一光调制装置42在第一时序调制蓝光B和第一部分绿光G1，第二光调制装置43在第一时序调制第二部分绿光G2；第一光调制装置42在第二时序调制红光R，第二光调制装置43在第二时序调制绿光G。
当第二荧光色轮采用青光荧光粉时，由于产生的光在青光区域的比例较大，因此，可以直接将青光分成两部分即分成第一部分青光C1和第二部分青光C2，并将第一部分青光C1与蓝光混合，以对蓝光进行校正，使其更接近DCI色域，此时分光装置的分光膜可以为低通镀膜，也可以为带通镀膜；
当第二荧光色轮采用绿光荧光粉时，由于产生的光的光谱会达到绿光区域，且比重比较大，因此，需要截取偏青光部分即波长不超过510nm的部分，也就是说，要将宽谱绿光分成两部分，即分成第一部分绿光G1和第二部分绿光G2，并将截取光谱左边部分即第一部分绿光G1与蓝光混合，以对蓝光进行校正，扩大合成的彩色图像的色域，同时还能对绿光进行一定的校正，使其更接近DCI色域，此时，分光装置的分光膜只能是绿光带通镀膜。
此外，本实施例中的光源系统还包括第三光源，该第三光源用于发射第二补偿光，本实施例中通过第一旋转色轮1600的第一荧光色段透射第二补偿光，当然，本发明并不仅限于此，在其他实施例中，光源系统还可以包括第二旋转色轮，以通过第二旋转色轮透射第二补偿光，同时将偏振态的红光转换为非偏振态的红光R1；与此同时，第二光调制装置43同时调制第三光和第二补偿光，即同时调制红光R和红光R1。
同样，第三光源400可以一直处于开启状态，也可以为了节约能源，仅在第一荧光色段旋转至第一光的光路上时处于开启状态。当第三光源仅在第一荧光色段处于开启状态时，本实施例中的光源系统还包括与第三光源相连的第三控制装置，用于控制第三光源在第一时序关闭，在第二时序开启，即在第一荧光色段旋转至第一光的光路上时开启，在第二荧光色段旋转至第一光的光路上时关闭。此时，第一光调制装置42和第二光调制装置43的调制时序图如图19所示。第一光调制装置42在第一时序同时调制蓝光B和第一部分绿光G1，第二光调制装置43在第一时序调制第二部分绿光G2；第一光调制装置42在第二时序同时调制红光R和红光R1，第二光调制装置43在第二时序调制绿光G。
本实施例提供的投影系统，通过光源系统在第一时序产生第一光束，在第二时序产生第二光束，第一光束包括第一光和第一补偿光，第二光束包括第二光，通过分光装置依序将第一光束和第二光束分成沿第一光路传输的光和沿第二光路传输的光，从而可以采用青光或绿光或青绿光对蓝光进行补偿，以扩大了蓝光的色域，使得合成的彩色图像的色域更宽广，能够满足REC.709和DCI的色域标准；
并且，本实施例提供的投影系统，采用两个光调制装置分别调制沿第一光路传输的光和沿第二光路传输的光，与采用单个光调制装置的系统相比，光效和亮度更高，与采用三个光调制装置的系统相比，结构更简单，成本更低。
实施例四
本实施例提供了一种投影系统，本实施例提供的投影系统与实施例一提供的投影系统的结构大体相同，均包括光源系统、分光装置、第一光调制装置和第二光调制装置，其不同之处在于，本实施例中的第二光源402为发射青光或绿光的发光二极管，且第二光源402发出的青光或绿光即第一补偿光为宽谱光。
参考图4，当第二光源402为发射青光的发光二极管时，旋转色轮404的透明色段4042同时透射蓝光和青光；分光装置在第一时序将第一补偿光分成第一部分第一补偿光和第二部分第一补偿光，即将青光C分成第一部分青光C1和第二部分青光C2；在第二时序将第二光分成沿第一光路传输的第三光和沿第二光路传输的第四光，即将黄光Y分成红光R和绿光G，第一光调制装置42和第二光调制装置43的调制时序图如图17所示，第一光调制装置42在第一时序调制蓝光B和第一部分青光C1，第二光调制装置43在第一时序调制第二部分青光C2；第一光调制装置42在第二时序调制红光R，第二光调制装置43在第二时序调制绿光G。
此时，由于第二光源402产生的光在青光区域的比例较大，因此，可以直接将青光分成两部分即分成第一部分青光C1和第二部分青光C2，并将第一部分青光C1与蓝光混合，以对蓝光进行校正，使其更接近DCI色域，此时分光装置的分光膜可以为低通镀膜，也可以为带通镀膜；
当第二光源402为发射绿光的发光二极管时，旋转色轮404的透明色段4042同时透射蓝光和绿光；分光装置在第一时序将绿光分成第一部分绿光G1和第二部分绿光G2；在第二时序将黄光Y分成红光R和绿光G。第一光调制装置42和第二光调制装置43的调制时序图如图18所示，第一光调制装置42在第一时序调制蓝光B和第一部分绿光G1，第二光调制装置43在第一时序调制第二部分绿光G2；第一光调制装置42在第二时序调制红光R，第二光调制装置43在第二时序调制绿光G。
此时，由于第二光源402产生的光在绿光区域的比重比较大，因此，需要截取偏青光部分即波长不超过510nm的部分，也就是说，要将宽谱绿光分成两部分，即分成第一部分绿光G1和第二部分绿光G2，并将截取光谱左边部分即第一部分绿光G1与蓝光混合，以对蓝光进行校正，扩大合成的彩色图像的色域，同时还能通过第二部分绿光G2对绿光进行一定的校正，使其更接近DCI色域，此时，分光装置的分光膜只能是绿光带通镀膜。
本实施例提供的投影系统，通过光源系统在第一时序产生第一光束，在第二时序产生第二光束，第一光束包括第一光和第一补偿光，第二光束包括第二光，通过分光装置依序将第一光束和第二光束分成沿第一光路传输的光和沿第二光路传输的光，从而可以采用青光或绿光对蓝光进行补偿，以扩大了蓝光的色域，使得合成的彩色图像的色域更宽广，能够满足REC.709和DCI的色域标准；
并且，本实施例提供的投影系统，采用两个光调制装置分别调制沿第一光路传输的光和沿第二光路传输的光，与采用单个光调制装置的系统相比，光效和亮度更高，与采用三个光调制装置的系统相比，结构更简单，成本更低。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (16)

1、一种投影系统，其特征在于，包括：
在第一时序产生第一光束，在第二时序产生第二光束的光源系统，所述第一光束包括第一光和第一补偿光，所述第二光束包括第二光，或者所述第二光束包括第二光和第一补偿光；
依序将所述第一光束和第二光束分成沿第一光路传输的光和沿第二光路传输的光的分光装置；
调制所述沿第一光路传输的光的第一光调制装置；
调制所述沿第二光路传输的光的第二光调制装置。
2、根据权利要求1所述的投影系统，其特征在于，所述第一光为基色光，所述第二光为包括至少两种基色光的宽谱光，且所述第一光与所述第二光的合光包含三基色光。
3、根据权利要求2所述的投影系统，其特征在于，所述第一补偿光的波谱范围介于所述第一光的波谱范围与所述第二光的波谱范围之间，且所述第一补偿光的波谱范围与所述第二光的波谱范围存在部分重叠。
4、根据权利要求1至3任一项所述的投影系统，其特征在于，所述分光装置包括第一棱镜和第二棱镜，所述第一棱镜和第二棱镜的交界面具有分光膜。
5、根据权利要求4所述的投影系统，其特征在于，所述光源系统包括：
发射第一光的第一光源；
发射第一补偿光的第二光源；
旋转色轮，所述旋转色轮至少包括一个荧光色段和一个透明色段，所述荧光色段用于吸收所述第一光并产生第二光。
6、根据权利要求5所述的投影系统，其特征在于，所述光源系统还包括：
第一控制装置，所述第一控制装置控制所述第二光源在第一时序开启，在第二时序关闭，以使所述第二光束包括第二光。
7、根据权利要求6所述的投影系统，其特征在于，在第一时序，所述第一光和第一补偿光同时透过所述透明色段形成第一光束。
8、根据权利要求4所述的投影系统，其特征在于，所述光源系统包括：
发射第一光的第一光源；
发射第一补偿光光的第二光源；
位于所述第一光的光路上的第一旋转色轮，所述第一旋转色轮至少包括一个荧光色段和一个透明色段，所述荧光色段用于吸收所述第一光并产生第二光；
位于所述第二光的光路上的第二旋转色轮，所述第二旋转色轮为透明色轮。
9、根据权利要求8所述的投影系统，其特征在于，所述光源系统还包括：
第二控制装置，所述第二控制装置控制所述第二光源在整个时序内开启，以使所述第二光束包括第二光和第一补偿光；或者所述第二控制装置控制所述第二光源在第一时序开启，在第二时序关闭，以使所述第二光束包括第二光。
10、根据权利要求4所述的投影系统，其特征在于，所述光源系统包括：
发射第一光的第一光源；
第一旋转色轮，所述第一旋转色轮至少包括第一荧光色段和第二荧光色段，所述第一荧光色段用于吸收所述第一光并产生第二光，所述第二荧光色段用于吸收所述第一光并产生第一补偿光。
11、根据权利要求5-10任一项所述的投影系统，其特征在于，当所述第一补偿光为窄谱光时，所述第一光束中的第一光沿第一光路传输，所述第一光束中的第一补偿光沿第二光路传输；
当所述第一补偿光为宽谱光时，所述分光装置将所述第一光束中的第一补偿光分成第一部分第一补偿光和第二部分第一补偿光，且所述第一部分第一补偿光和所述第一光束中的第一光同时沿第一光路传输，所述第二部分第一补偿光沿第二光路传输。
12、根据权利要求11所述的投影系统，其特征在于，所述分光装置将所述第二光束中的第二光分成第三光和第四光，且所述第三光沿第一光路传输，所述第四光沿第二光路传输；当所述第二光束包括第一补偿光时，所述第一补偿光与所述第四光同时沿第二光路传输。
13、根据权利要求12所述的投影系统，其特征在于，所述光源系统还包括：
发射第二补偿光的第三光源，所述第二补偿光与所述第三光为同色异谱的光，且所述第二补偿光与所述第三光同时沿第一光路传输。
14、根据权利要求13所述的投影系统，其特征在于，所述光源系统还包括：
第三控制装置，所述第三控制装置控制所述第三光源在第一时序关闭，在第二时序开启，以使所述第二补偿光与所述第三光同时产生。
15、根据权利要求14所述的投影系统，其特征在于，所述第一光为蓝光，所述第三光为红光，所述第四光为绿光；所述第一补偿光为青光或绿光或青绿光；所述第二补偿光为红光。
16、根据权利要求15所述的投影系统，其特征在于，所述第一补偿光的波长范围为510nm~530nm；所述第二补偿光的波长范围为625nm~645nm。
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