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WO2015149700A1 - 一种光源系统及投影系统 - Google Patents

一种光源系统及投影系统 Download PDF

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Publication number
WO2015149700A1
WO2015149700A1 PCT/CN2015/075652 CN2015075652W WO2015149700A1 WO 2015149700 A1 WO2015149700 A1 WO 2015149700A1 CN 2015075652 W CN2015075652 W CN 2015075652W WO 2015149700 A1 WO2015149700 A1 WO 2015149700A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light source
wavelength
wavelength conversion
excitation
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/CN2015/075652
Other languages
English (en)
French (fr)
Inventor
李屹
叶红
王则钦
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
Priority to JP2016560780A priority Critical patent/JP6364503B2/ja
Priority to US15/301,198 priority patent/US10110861B2/en
Priority to EP15772363.6A priority patent/EP3128749B1/en
Publication of WO2015149700A1 publication Critical patent/WO2015149700A1/zh
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
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • 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
    • G03B21/005—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
    • G03B21/208—Homogenising, shaping of the illumination 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
    • G03B33/12—Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. dichroic mirrors
    • 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]
    • H04N9/3141—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

Definitions

  • the present invention relates to the field of optical display, and more particularly to a light source system and a projection system.
  • the light source adopts a white light source, and after the white light source passes through the spectral filter, the three primary colors of red, green and blue are sequentially generated, and the three primary colors of red, green and blue sequentially reach the DMD, and are discharged after being processed by the DMD.
  • This monolithic the DMD projection system has a simple structure, the utilization of the light source is very low, and most of the light is lost after passing through the spectral filter, which results in low brightness of the projection system. And a single DMD The red, green, and blue primary colors are processed in sequence, and the color switching rate is limited, resulting in a 'rainbow' phenomenon.
  • the three-chip DMD projection technology has gradually developed, three-chip DMD
  • the projection system adopts a white light source, which is divided into red, green and blue primary colors by prisms and then incident on three DMDs.
  • the DMD processes the received light, compared to the monolithic DMD projector system, three-piece
  • the DMD projection system has higher luminous efficiency, but the system is complicated in structure, difficult to install, and costly.
  • a light source system of the present invention includes: a first light source for generating a first broad spectrum light; a second light source for generating a second wavelength light; and a splitting light combining device on the optical path of the first light source and the second light source for generating the first light source
  • the first broad spectrum light is split into a third wavelength light propagating along the first channel and a fourth wavelength light propagating along the second channel, and at least a portion of the second wavelength light of the second source is propagated along the second channel;
  • the first spatial light a modulator for receiving light of the first channel and modulating light propagating the first channel; and a second spatial light modulator for receiving light of the second channel and modulating light propagating the second channel; a controller electrically connected to the first light source, the second light source, the first spatial light modulator, and the second spatial light modulator for controlling the first light source and the second light source, and modulating the first spatial light modulator and the second a spatial light modulator;
  • the first broad spectrum light and the second wavelength light have different
  • the second wavelength light emitted by the second light source is broad spectrum light.
  • the second wavelength light is cyan
  • the first wide spectrum light is yellow light
  • the second light source comprises: a second excitation light source for generating second excitation light; and a second wavelength conversion device located on the optical path of the second excitation light for absorbing the excitation light to generate the laser light;
  • the driving device is configured to drive the horizontal, vertical or circular motion of the second wavelength conversion device.
  • the second wavelength conversion device comprises: a wavelength conversion layer and a substrate; the substrate is configured to carry a wavelength conversion layer.
  • the second wavelength conversion device comprises: a substrate, a wavelength conversion layer and a scattering layer; the substrate is configured to carry a wavelength conversion layer and a scattering layer; the wavelength conversion layer is located between the substrate and the scattering layer; or The scattering layer is between the substrate and the wavelength conversion layer.
  • the spectroscopic unit is configured to split the second wavelength light into a fifth wavelength light propagating along the first channel and a sixth wavelength light propagating along the second channel.
  • the controller controls the first spatial light modulator to modulate the third wavelength light and the fifth wavelength light, and controls the second spatial light modulator to modulate the fourth wavelength light and the sixth wavelength light.
  • the light combining and combining device comprises a first mirror, a first dichroic element, a second mirror, a TIR prism, and a Philips prism; the first mirror and the second dichroic element being placed in parallel for wavelength combining the first broad spectrum light and the second wavelength light; the second mirror for using the second wavelength Light and first broad spectrum light reflected into a TIR prism; the Philips prism for splitting light reflected by the TIR prism into light propagating along the first channel and light propagating along the second channel, respectively.
  • the light combining and illuminating device further comprises: a light homogenizing device, the light absorbing device being located between the second dichroic element and the second mirror for performing the first broad spectrum light and the second wavelength light Even light.
  • the fourth wavelength light and the fifth wavelength light are light of different dominant wavelengths of the same color.
  • the second light source is a solid state semiconductor light emitting element that emits any one of three primary colors of light.
  • the first light source is a laser diode or a laser diode array.
  • the optical combining device comprises a first dichroic element and a second dichroic element; the first dichroic element is configured to guide the first broad spectrum light into a third wavelength propagating along the first channel Light and reflecting a fourth wavelength of light entering the second dichroic element; the second dichroic element is for directing propagation of the second wavelength light and the fourth wavelength light along the second channel.
  • the second light source comprises a second excitation light source, a scattering device and a second driving device;
  • the second excitation light source is a solid-state semiconductor light-emitting element, and the device emits any one of three primary colors;
  • the scattering device An optical path on the second excitation source for scattering light emitted by the second excitation source; and the second driving device is configured to drive the scattering device to move.
  • the first light source includes: a first excitation light source, a first wavelength conversion device, and a first driving device; the first excitation light source is configured to generate excitation light, and the first excitation light source is a solid-state semiconductor light-emitting element; the first wavelength conversion device is disposed on an optical path of the excitation light for absorbing excitation light to generate a laser beam; and the first driving device is configured to drive the first wavelength conversion device to move.
  • the first wavelength conversion device comprises: a wavelength conversion layer and a substrate for carrying the wavelength conversion layer; the wavelength conversion layer is attached with a yellow phosphor.
  • the first wavelength conversion device comprises: a wavelength conversion layer, a scattering layer and a substrate for carrying the wavelength conversion layer and the scattering layer; the wavelength conversion layer is located between the scattering layer and the substrate.
  • the first excitation light source is a laser diode or a laser diode array.
  • the first light source is a solid state semiconductor light emitting element.
  • the controller controls the first light source and the second light source to be sequentially turned on / The off state of the first light source and the second light source in the same cycle does not coincide.
  • the controller controls the opening of the first light source and the second light source /
  • the off state of the first light source and the second light source in the same period partially overlap but does not completely coincide.
  • the first light source and the second light source are turned on/off at least N times in the same period, N Is a positive integer.
  • the present invention also includes a projection system including the light source system of any of the above aspects.
  • two spatial light modulators are controlled by the controller to modulate the broad-spectrum light, thereby realizing the splitting of the broad-spectrum light while being modulated by the spatial light modulator without loss, thereby improving the light source.
  • the brightness of the system at the same time, the invention uses two spatial light modulators to modulate the light under the control of the controller, and the light source system is simpler in structure and lower in cost while ensuring the brightness of the light source system.
  • FIG. 1 is a schematic structural view of a light source system in a first embodiment of the present invention.
  • Figure 2 is a spectrum diagram of the first embodiment of the present invention.
  • Fig. 3 is a partial schematic structural view of a light source system in the first embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a controller in the first embodiment of the present invention.
  • Figure 5 is a timing diagram of the controller control light source and the spatial light modulator in the first embodiment of the present invention.
  • Figure 6 is another timing diagram of the controller controlling the light source and the spatial light modulator in the first embodiment of the present invention.
  • Figure 7 is another timing diagram of the controller controlling the light source and the spatial light modulator in the first embodiment of the present invention.
  • Figure 8 is a schematic view showing the structure of a light source system in a second embodiment of the present invention.
  • Figure 9 is a schematic view showing the structure of a light source system in a third embodiment of the present invention.
  • Figure 10 is a schematic view showing the structure of a light source system in a fourth embodiment of the present invention.
  • Figure 11 is a block diagram showing the structure of a wavelength conversion device in a fourth embodiment of the present invention.
  • Figure 12 is a block diagram showing another structure of a light source system in a fourth embodiment of the present invention.
  • Figure 13 is a block diagram showing another structure of a wavelength conversion device in a fourth embodiment of the present invention.
  • Figure 14 is a timing chart of the controller control light source and the spatial light modulator in the fourth embodiment of the present invention.
  • the three primary colors of light according to the present invention are red, green and blue light.
  • One cycle of the present invention refers to the processing time of one frame of data.
  • FIG. 1 It is a schematic structural diagram of a light source system according to a first embodiment of the present invention, the light source system: a first light source 1, a second light source 103, a light splitting and combining device 2, a first spatial light modulator 106, and a second spatial light modulator 107 and controller 108.
  • the first light source 1 and the second light source 103 are located on the same side of the optical splitting device 2, and the optical splitting device 2 is located at the first light source 1
  • the outgoing light path is located on the outgoing light path of the second light source 103.
  • the split light combining device splits the light of the first light source 1 or the second light source 103, the light is guided into the first spatial light modulator 106. Or a second spatial light modulator 107.
  • the controller 108 and the first light source 1, the second light source 103, the first spatial light modulator 106, and the second spatial light modulator 107 Electrical connection. among them:
  • the first light source 1 generates a first broad spectrum light, the first broad spectrum light having a wavelength range covering at least 10 nm Lights such as yellow light cover wavelengths from 475nm to 700nm (see Figure 2A) and cyan coverage wavelengths range from 440nm to 580nm (see Figure 2B). ).
  • the first broad spectrum light has a wavelength coverage of at least 30 nm.
  • the first light source of the invention 1 By using broad-spectrum light, wavelength separation can realize separation of light of a wide spectrum into at least two beams, and the two beams are light of the same timing, which not only makes the structure of the light source simple (avoiding the use of multiple light sources in the prior art) ), and the utilization of light is also significantly improved (no red phosphor is required to generate red excitation light), and at the same time, the primary light can be obtained without additional means for processing the light, thereby making the structure simpler.
  • the broad-spectrum light yellow light can be obtained by green light and red light after being split, and the broad-spectrum light blue light can be subjected to spectral processing to obtain blue light and green light.
  • the first light source 1 includes an excitation light source 101 for generating excitation light, a wavelength conversion device 102, and a first driving device 100.
  • the wavelength conversion device 102 is located on the optical path of the excitation light source 101; the first driving device 100 is configured to drive the wavelength conversion device to move.
  • the excitation light source 101 For the solid-state semiconductor light-emitting element, preferably, the excitation light source 101 can generate excitation light such as blue light or UV light; further preferably, the excitation light source 101 is a laser diode capable of generating blue light or ultraviolet light ( LD) or a combination of LED or laser diode and LED.
  • LD blue light or ultraviolet light
  • the excitation light source may be an array of the above light sources, that is, an LD array, or an LED array or an LD and an LED Combination array.
  • the excitation light source 101 of the present invention employs an LD as an excitation light source.
  • the LD is relatively small in optical expansion compared to the LED as an excitation light source, and has high optical density and high light intensity.
  • the wavelength conversion device 102 The substrate and the wavelength conversion layer are disposed, and the substrate is used to carry a wavelength conversion layer, and the wavelength conversion layer may be a phosphor capable of generating broad spectrum light after being excited, such as a yellow phosphor, a cyan phosphor, a magenta phosphor, or the like.
  • the wavelength conversion layer is located on the periphery of the substrate and distributed in a ring shape, or when the substrate is rectangular, located on the surface of the substrate and distributed in a strip shape.
  • the first driving device 100 drives the wavelength conversion device 102 to move (circular motion or horizontal motion or vertical motion) such that a spot of the excitation light formed on the wavelength conversion layer acts on the wavelength conversion layer along a predetermined path.
  • the first driving device 100 is a motor
  • the substrate is a circular substrate
  • the motor is located at the center of the substrate.
  • the color of the second light source 103 is not particularly limited, and is determined according to the light emitted from the first light source 1.
  • First light source 1 The light obtained after the splitting is combined with the second light source 103 to generate at least three primary colors of light.
  • the second light source 103 The emitted light is any of the three primary colors of light (i.e., any of red, green, and blue).
  • the first light source 1 is yellow light, and after splitting, red light and green light are obtained, then the second light source 103 is preferably blue light; when the first light source 1 For cyan, after the splitting, green light and blue light are obtained, and the second light source 102 is preferably red light, which is not enumerated here.
  • the second light source 103 can be an LED or an LD.
  • the second light source 103 is a laser diode or a laser diode array.
  • the second light source 103 uses a laser diode or a laser diode array to enable the second light source 103.
  • the optical expansion amount is small, and the brightness of the light source is high, and at the same time, the wavelength of the subsequent splitting and combining device 2 can be combined.
  • the wavelength conversion layer is exemplified as a yellow phosphor in the embodiment, and the second light source 103
  • the light of the second wavelength emitted is blue light.
  • a light combining unit 2 for dividing the first broad spectrum light into the third wavelength light propagating along the first channel 11 and along the second channel 12
  • the fourth wavelength light propagates and propagates at least a portion of the second wavelength light along the second channel 12.
  • the optical splitting device 2 may specifically include a first dichroic element 104 and a second dichroic element 105. Wherein the first dichroic element 104 is located between the first spatial light modulator 106 and the first light source 1, and the second dichroic element 105 is located between the second light source 103 and the second spatial light modulator 107.
  • First light source 1 The outgoing light is yellow (i.e., the yellow phosphor is excited to produce yellow light), and after the yellow light reaches the first dichroic element 104, it is divided into a third wavelength of light red and a fourth wavelength of green.
  • the second dichroic element 105 is designed to transmit blue light to reflect green light, the red light reaches the first light modulator 106 along the first channel 11, and the green light is reflected to the second Dichroic component 105 The trailing edge second channel 12 enters the second light modulator 107.
  • the dichroic element is capable of reflecting light of a certain wavelength and transmitting light of another wavelength band; or is capable of reflecting light of one or several wavelengths and transmitting light of another wavelength wavelength.
  • first spatial light modulator 106 for modulating light propagating along the first channel 11.
  • Second spatial light modulator 108 configured to modulate light propagating along the second channel 12.
  • the first spatial light modulator 106 and the second spatial light modulator 107 may include DMD (Digital Micromirror Device, digital micromirror device or LCD (Liquid Crystal Disp1ay, liquid crystal display device) or LCOS ( Liquid Crysta1 on Si1icon, liquid crystal silicon-on-silicon device).
  • DMD Digital Micromirror Device, digital micromirror device or LCD (Liquid Crystal Disp1ay, liquid crystal display device) or LCOS ( Liquid Crysta1 on Si1icon, liquid crystal silicon-on-silicon device).
  • the first spatial light modulator 106 modulates the red light
  • the second spatial light modulator 107 Modulate the blue and green light of the time series.
  • yellow light is generated by the yellow phosphor, and the yellow light is split into red light and green light.
  • the yellow phosphor has high conversion efficiency
  • red light and green light are the same time series light. And can be used at the same time, greatly improving the conversion efficiency and utilization efficiency of the light source.
  • the first light source is cyan
  • the cyan light is divided into blue light and green light
  • the second light source provides red light, which also improves the conversion efficiency and utilization of the light source.
  • the controller 108 is controlled by the first light source 1 and the second light source 103, and is coupled to the first spatial light modulator 106. Modulation is performed with the second spatial light modulator 107.
  • the controller 108 is configured to pulse modulate the first light source 101 and the second light source 103 to implement the first light source.
  • the brightness and on/off control of the 101 and the second light source 103 are controlled.
  • Controller 108 pairs first spatial light modulator 106 and second spatial light modulator 107
  • the modulation includes: timing modulation of light and modulation of light output.
  • the controller 108 can include a data processing module 1081 and a control module 1082.
  • the data processing module 1081 is used to process the source data;
  • the control module 1082 is used to turn on the first source 101 and the second source 103.
  • the control is performed intermittently, and the first spatial light modulator 106 and the second spatial light modulator 107 are controlled to modulate light according to the on/off of the light source.
  • the source data in this embodiment includes video or image data.
  • the control process or working process of the control module 1082 will be described below with reference to FIGS. 5 to 7.
  • the control module 1082 The first light source 1 and the second light source 103 are sequentially turned on/off, and the states of the first light source and the second light source that are turned on in the same period do not coincide. As shown in Figure 5, in one cycle, the first 0.3T The control module 1082 controls the first light source 1 to not emit light, and the control module 1082 controls the second light source 103 to emit light, and the second light source 103
  • the light (for example, blue light) passes through the second channel to the second spatial light modulator 107, and the control module 1082 controls the second spatial light modulator 107.
  • the blue light is modulated to output blue light corresponding to the video or image data; at 0.3T ⁇ 1T, the control module 1082 controls the first light source 1 to emit light, and the second light source 103 is controlled to not emit light, and the first light source 1
  • the excitation light source 101 emits excitation light, and after the excitation light reaches the wavelength conversion device 102, the wavelength conversion device 102 is excited.
  • the upper wavelength converting material generates a laser beam, for example, the laser light is yellow light, the splitting light combining device divides the yellow light into red light and green light, and the red light enters the first spatial light modulator along the first channel. Medium, the green light enters the second spatial light modulator 107 along the second channel, and the control module 1082 controls the first spatial light modulator 106.
  • the red light is modulated to output red light corresponding to the video or image data
  • the second spatial light modulator 107 is controlled to modulate the green light to output green light corresponding to the video or image data.
  • the control module 1082 The modulation of the spatial light modulator is implemented according to the data result processed by the data processing module 1081. More specifically, each frame of the input data corresponds to R, G, B on the pixel of the image.
  • the value of the first spatial light modulator 106 and the second spatial light modulator 107 Modulation of the three colors of red, green, and blue light that arrive thereon such that each frame of data of the chromaticity of the light output from the spatial light modulator corresponds to R, G, B on the pixel of the image
  • the values are one-to-one correspondence, so that high fidelity of the image display can be guaranteed.
  • the control module 1082 is shown in FIG. 5 to control the first light source and the second light source to be sequentially turned on / Broken. In practical applications, the on/off of the first source and the second source may overlap in time in the same period T, as shown in Fig. 6.
  • the control module controls on/off of the first light source and the second light source, the first light source 1 and the second light source 103 are at least partially coincident in an open state in the same cycle.
  • the lighting of the first light source 1 and the second light source 103 may coincide in a period, such as in a time period.
  • the first light source 1 and the second light source 103 are both open (shown in Fig. 6A and Fig. 6B).
  • the first spatial light modulator 106 is at 0.3T ⁇ 0.4T.
  • the red light is modulated inside (shown in Figure 6C), and the second spatial light modulator 107 modulates the cyan ( Figure 6D) Shown), where cyan is a combination of blue and green light, this modulation mode can increase the brightness of the light output by the spatial light modulator.
  • the modulation mode is equivalent to adding a primary color cyan, expanding the color gamut and increasing the output brightness.
  • the first light source 1 and the second light source 103 are turned on/off at least N times in the same period (N It is a positive integer), as shown in Figure 7.
  • the control module 1082 performs PWM modulation on the first light source 1 and the second light source 103, the first light source 1 and the second light source 103.
  • the duty ratio is not particularly limited.
  • the duty ratio of the first light source 1 is 60%
  • the duty ratio of the second light source 103 may be 40% or 50%. and many more.
  • the 'rainbow' effect can be eliminated by increasing the switching speed of the color in time series.
  • the first light source 1 generates broad spectrum light
  • the second light source 103 For any of the three primary colors of light, the controller controls the two light sources and modulates the spatial light modulator such that the light of the first source 1 and the second source 103
  • the light is utilized to improve the conversion efficiency of the light source, and the spatial light modulator can work simultaneously, simultaneously modulating the light of different colors, improving the switching speed of the primary light, and effectively avoiding the appearance of the 'rainbow' effect.
  • the use of two spatial light modulators taking into account the brightness of the output light of the light source system, makes the system relatively simple and low cost.
  • the present invention proposes a second embodiment relating to a light source system. This will be described below in conjunction with Figure 8.
  • the light source system includes a first light source 801 and a second light source 802, the optical splitting device 2, the first spatial light modulator 805, the second spatial light modulator 806 and the controller 807.
  • the first light source 801 includes a hybrid light source, and the mixed light generated by the hybrid light source is split by the light combining device. 2 After splitting, it can produce at least two colors of light.
  • the first spatial light modulator and the second spatial light modulator are entered along the first channel 81 and the second channel 82, respectively.
  • the hybrid light source is a solid state semiconductor light emitting element, preferably an LED Or a hybrid light source of a laser diode.
  • an LED light source containing any two of the three primary colors of light, or an LED chip surface covering the wavelength conversion material, or an LED containing any two of the three primary colors of light A hybrid source of light source and laser source.
  • the hybrid light source of the LED light source and the laser light source can not only improve the brightness of the light source, but also obtain broad spectrum light.
  • Controller 807 controls first light source 801
  • the medium mixed light source is turned on/off at the same time.
  • the light of the hybrid light source directly reaches the first dichroic element 803 in the optical splitting device 2 It is divided into red light propagating along the first channel and green light propagating along the second channel.
  • the light source of the light source system may be a hybrid light source, and the wavelength conversion device is not needed, thereby making the structure simpler, and the overall brightness of the light source system is greatly improved.
  • the present invention proposes a third embodiment relating to a light source system. This will be described below in conjunction with Figure 9.
  • the light source system includes a first light source 1 and a second light source 904, the optical splitting device 2, the first spatial light modulator 907, the second spatial light modulator 908 and the controller 909.
  • the first light source 1 includes an excitation light source 901 for emitting excitation light. And for receiving the excitation light to be generated by the laser wavelength conversion device 902 and the spectral filter 903.
  • the wavelength conversion device 902 may be transmissive or reflective.
  • the excitation light source 901 is located on the side or opposite side of the wavelength conversion device 902 covered with the wavelength conversion layer (the side away from the spectroscopic unit 2), and the spectral filter 903 is located in the wavelength conversion device. Between 902 and excitation source 901.
  • the spectroscopic filter 903 transmits the excitation light to be reflected by the laser light so that it is incident on the spectroscopic filter 903
  • the laser light is reflected as the outgoing light of the first light source, and the brightness of the emitted light is increased.
  • the wavelength conversion device 902 is of a reflective type
  • the excitation light source 901 and the spectral filter 903 are located in the wavelength conversion device 902.
  • the spectral filter 903 is located on the optical path of the laser, and the excitation light generated by the excitation light source 901 is obliquely incident on the wavelength conversion device.
  • the spectral filter 903 For transmitting the laser light, reflecting the excitation light, thereby reflecting the excitation light that is not used on the spectroscopic filter 903 back to the wavelength conversion device 902, and exciting the wavelength conversion device 902 again.
  • the wavelength conversion material on the top allows the excitation light to be fully utilized, generating more laser light, thereby increasing the brightness of the emitted light.
  • the light source system in this embodiment may further include one or more lenses for collecting or collecting the light beams, thereby reducing the loss of light during propagation and improving the utilization of light.
  • the lens may be located between the excitation light source and the wavelength conversion device, between the wavelength conversion device and the spectroscopic filter, between the first light source and the spectroscopic unit, between the second source and the spectroscopic device, and the like.
  • the number of lenses used in the light source system is not particularly limited, and the position of the lens may be set according to the needs of light collection and convergence.
  • the optical splitting and combining device combines the first wide-spectrum light and the second-wavelength light by means of wavelength combining light, without increasing the optical expansion amount, thereby improving the light efficiency and brightness of the projection system.
  • the present invention proposes a fourth embodiment relating to a light source system. This will be described below in conjunction with FIG.
  • the light source system in this embodiment includes a first light source 1 And a second light source 3, a light combining unit 2, a first spatial light modulator 1013, a second spatial light modulator 1014, and a controller 1015.
  • the splitting and combining device 2 is located at the first light source 1 and the light source of the second light source 3, the light of the first light source 1 and the second light source 2 are split or combined and propagated to the first spatial light modulator 1013 and the second spatial light modulator 1015, the controller 1015 is electrically connected to the first light source 1, the second light source 3, the first spatial light modulator 1013, and the second spatial light modulator 1014, for the first light source 1 and the second light source 3 Control is performed to modulate the first spatial light modulator 1013 and the second spatial light modulator 1014.
  • the first light source 1 produces a first broad spectrum light, the first broad spectrum light having a wavelength range covering at least 10 nm Light. Preferably, the wavelength range of the first broad spectrum light covers 30 nm of light.
  • the first light source 1 may include a first excitation light source 1001 and a first wavelength conversion device 1002.
  • the first excitation light source 1001 is preferably a solid-state semiconductor light-emitting element for emitting excitation light, which may be blue light or UV light or the like.
  • the first wavelength conversion device 1002 A wavelength conversion layer (the wavelength conversion layer including a fluorescent material) is disposed thereon, and the first wavelength conversion device 1002 is excited by the excitation light to generate a laser light different from the excitation light.
  • the fluorescent material is applied to the annular region of the wavelength conversion device 1002. Inside, a wavelength conversion layer is formed.
  • the fluorescent material may be a magenta, red, green, cyan, and yellow phosphor; in the embodiment, the wavelength conversion layer is preferably a yellow phosphor, and the yellow phosphor is excited by excitation light to generate yellow light.
  • the wavelength range of yellow light is 567nm ⁇ 617nm.
  • the first light source 1 in this embodiment may further include a first driving device for driving the first wavelength conversion device 1002. Exercise.
  • the first driving device is a motor.
  • the first excitation light source 1001 is located at one side of the first wavelength conversion device 1002, and the first excitation light source 1001
  • the generated excitation light can be incident on the fluorescent material of the first wavelength conversion device 1002, which is located on a region where the first wavelength conversion device 1002 is different from the wavelength conversion layer.
  • second light source 3 It may be a light source that produces broad spectrum light or any of the three primary color lights.
  • the three primary colors are red, green, and blue; the broad spectrum of light covers a range of at least 10 nm.
  • the second light source 3 A second excitation source 1003 may be included, and the light emitted by the second excitation source 1003 is preferably blue light. It may also include a scattering device 1004 located at the second excitation source 1003 The optical path is used to eliminate the coherence characteristics of the second excitation source 1003, thereby reducing the 'speckle' phenomenon.
  • the scattering device 1004 A transparent substrate may be included, the substrate is provided with a scattering material; or the scattering device comprises a transparent scattering substrate made of a scattering material.
  • the scattering device 1004 A motor can also be included for driving substrate motion to cause the scattering element 1004 to move, avoiding heat in the scattering device 1004.
  • a large amount of heat is concentrated at a certain point, which affects the efficiency of scattering by the scattering device.
  • the region of the scattering device 1004 having the scattering function is disposed on the second excitation light source 1003. In the light path, the scattering device can effectively avoid the phenomenon of 'speckles' in the final emitted light.
  • the second light source 3 when the second light source 3 produces broad spectrum light, as shown in Figs. 12 and 13, it may include a second excitation light source 1203.
  • the wavelength conversion device 1204 is located on the optical path of the second excitation light source 1203, and the second excitation light source 1203 can be capable of generating blue light or UV light. a solid-state semiconductor light-emitting element such as light, the second excitation light source 1203 is for emitting excitation light, and the wavelength conversion device 1204 includes a wavelength conversion layer 1301 disposed on the substrate 1303.
  • the substrate 1303 may be a transparent substrate or a reflective substrate, and is not particularly limited.
  • FIG. 12 in this embodiment shows a wavelength conversion device 1204 having a transparent substrate 1303.
  • the wavelength conversion layer 1301 preferably contains magenta phosphor or cyan phosphor.
  • the wavelength conversion layer 1301 is coated on the substrate On the outer circumference of 1303.
  • the wavelength conversion device 1204 may further include a scattering layer 1302, which may be located on the wavelength conversion layer 1301 and the substrate 1303. Between, or the wavelength conversion layer 1301 is located between the scattering layer 1302 and the substrate 1303, the scattering layer 1302 can make the second light source 3
  • the outgoing light is more uniform, thus avoiding the phenomenon of 'speckles' in the final output light.
  • the scattering layer 1302 and the wavelength conversion layer 1301 It is also possible to form a layer of wavelength-converting scattering layer by mixing the same layer, that is, the scattering material and the wavelength converting material. This technical solution makes the structure of the wavelength converting device 1204 simpler and more uniform in scattering.
  • the exiting light path may include a lens for collecting or collecting light to reduce loss caused by light diffusion, thereby improving the brightness of the light emitted from the second light source 3.
  • the light combining and combining light element 2 includes a first reflecting mirror 1006 and a dichroic element which are sequentially disposed in accordance with the optical path propagation direction. 1005, first focus lens 1007, light homogenizer 1008, second focus lens 1009, second mirror 1010, TIR prism 1011 and Philips Prism 1012.
  • the first dichroic element 1006 is located on the optical path of the outgoing light of the second light source 3 for reflecting the outgoing light of the second light source 3 onto the dichroic element 1005, the dichroic element 1005 is located on the optical path of the outgoing light of the first light source 1 (herein referred to as the first optical path) for transmitting the outgoing light of the first light source and reflecting the outgoing light of the second light source 3 along the first optical path.
  • First focus lens 1007 Light used to converge the first light path.
  • the light homogenizing device 1008 includes, but is not limited to, a homogenizing rod. The light homogenizing device 1008 is located on the first optical path for further homogenizing the light of the first optical path.
  • Second focus lens The 1009 is located on the first optical path for further focusing the light of the first optical path.
  • the second mirror 1010 is for reflecting the light of the first optical path to be incident on the TIR prism 1011.
  • TIR The prism is used to reflect the light from the first light path onto the Philips prism, Philips The prism is configured to split the outgoing light of the first light source into a third wavelength light propagating along the first channel and a fourth wavelength light propagating along the second channel, and at least partially exiting the second light source (second wavelength light) The second channel spreads.
  • Philips The prism is configured to split the exiting light of the second light source into a fifth wavelength light propagating along the first channel and a sixth wavelength light propagating along the second channel.
  • the fourth wavelength light and the fifth wavelength light may be different dominant wavelength lights of the same color, and the solution may improve the color gamut range of the light source system.
  • the colors of the outgoing light of the first light source and the second light source are the same, since the spectral ranges are different, the light emitted by the first light source and the second light source can be effectively combined in wavelength, without increasing the optical expansion amount, thereby improving Light effect.
  • the spatial light modulator includes a first spatial light modulator 1013 and a second spatial light modulator 1014.
  • First spatial light modulator 1013 is for modulating light propagating in the first channel; and second spatial light modulator 1014 is for modulating light propagating along the second channel.
  • the controller 1015 is configured to control the first light source 1001 and the second light source 1003, and to the first spatial light modulator Modulation of 1013 and second spatial light modulator 1014.
  • the controller 1015 is configured to pulse modulate the first light source 1001 and the second light source 1003 to implement the first light source 1001. And the control of the brightness and on/off of the second light source 1003.
  • Controller 1015 pairs first spatial light modulator 1013 and second spatial light modulator 1014
  • the modulation includes: modulation of how much light is emitted.
  • the controller 1015 The control process or work process is described.
  • the outgoing light of the first light source is exemplified by yellow light
  • the outgoing light of the second light source is exemplified by cyan light.
  • the yellow light is split by the optical splitting device to obtain red light and first green light
  • the clear light is split by the splitting light combining device to obtain second green light and blue light.
  • the controller 1015 controls the first light source 1 to not emit light, the controller 1015 controls the second light source 3 to emit light, and the light of the second light source 3 passes through Philip
  • the controller 1015 Controlling the second spatial light modulator to modulate the blue light, and controlling the first spatial light modulator to modulate the second green light (the modulation is performed according to the result of the controller processing the source data); at 0.3T ⁇ 1T Controller 1015 Controls the first light source 1 Illuminates, controls the second light source 3 Does not emit light, the first light source 1 emits yellow light, and the yellow light passes through Philips
  • the prism is further divided into red light and first green light, the first green light enters the first spatial light modulator along the first channel, and the red light enters the second spatial light modulator along the second channel, the controller 1015 The first spatial light modulator is controlled to modul
  • the first green light and the second green light are light of different dominant wavelengths of the same color, but after color combining, green primary color light can be obtained.
  • both the outgoing light of the first light source and the outgoing light of the second light source may be any wide-spectrum light (the primary light obtained after the splitting light includes at least three primary colors of light), the first light source and the second light source After the splitting light is split, the light is combined by the splitting and combining device, and then split by the prism.
  • the first light source can obtain two basic colors of different colors by splitting the light
  • the second light source can obtain two different colors of the primary light after being split.
  • a certain primary color light split by the first light source and a certain primary color light separated by the second light source may become a primary color light after being combined, thereby improving the color gamut coverage of the light source, thereby causing the light source system to output light.
  • the image that reaches the display area is more realistic.
  • the outgoing light of the first light source may be yellow
  • the outgoing light of the second light source is magenta
  • the colors of the outgoing light of the first light source and the second light source may also be interchanged
  • the specific splitting light is as described above. Example.
  • the control module 1082 is shown in FIG. 12 to control the first light source and the second light source to be sequentially turned on /
  • the on/off of the first light source and the second light source may overlap in time in the same period T, and may be turned on/off N times in the same period T (N As a positive integer, the first light source and the second light source are turned on/off multiple times in the same period T, which improves the switching frequency of the light, thereby effectively overcoming the 'rainbow' effect.
  • the above technical solution of the embodiment adopts two wide-spectrum lights, and is split by the splitting and combining device to enter two spatial light modulators, and the light of the light source has no loss, and the two spatial light modulators respectively have the same time period Different colors of light are modulated to further enhance the brightness of the light source.
  • the two spatial light modulators simultaneously process the light to improve the switching rate of the three primary colors, thereby avoiding the 'rainbow' effect.
  • the invention may also include a projection system comprising the light source system of any of the above embodiments.

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Abstract

一种光源系统及投影系统，该光源系统包括：产生第一宽谱光的第一光源（1），产生第二波长光的第二光源（103），用于分光合光的分光合光装置（2），第一空间光调制（106），第二空间光调制器（107），和对第一光源（1）与第二光源（103）进行控制并对第一空间光调制器（106）与第二空间光调制器（107）进行调制的控制器（108）。该投影系统包括该光源系统。该光源系统及投影系统不仅亮度高，色域广，有效消除了彩虹效应，而且结构简单，整机成本低。

Description

一种光源系统及投影系统 技术领域
本发明涉及光学显示领域，更具体的说，涉及一种光源系统及投影系统。
背景技术
随着投影显示技术的日渐成熟，市场上从原始的单片式 DMD 投影技术逐渐发展到三片式 DMD 投影显示系统。
传统的单片式 DMD 投影技术中，光源采用白光光源，白光光源经过分光滤光片后，依序产生红、绿、蓝三基色光，红、绿、蓝三基色光依序到达 DMD 上，经 DMD 处理后出射。这种单片式 DMD 投影系统虽然结构简单，但是光源的利用率非常低，大部分的光经分光滤光片后损失，这导致投影系统的亮度低。并且单个 DMD 依序处理红、绿、蓝三基色光，颜色切换速率受限，从而导致'彩虹'现象出现。为了解决上述的问题，三片式 DMD 投影技术逐渐发展起来，三片式 DMD 投影系统采用白光光源，该白光光源经棱镜分成红，绿，蓝三基色光后入射到三个 DMD 上， DMD 对接收到的光进行处理，相对于单片式 DMD 投影仪系统，三片式 DMD 投影系统具有更高的光效，但是该系统结构复杂，安装困难，且成本较高。
如何兼顾光源利用率与整机成本成为本行业迫切要解决的技术难题，于是，市场上出现了双片式 DMD 投影系统，如申请号为 US5612753 和 US20120257124 ，这些专利采用了双片式 DMD ，但是这些技术虽然结构相对与 3DMD 简单了，但是在亮度上仍然不够理想，并且仍然不能解决'彩虹'效应的困扰。因此，需要一种新型光源系统，能够实现高亮度的同时有效解决'彩虹'效应问题。
 技术问题
本发明的目的在于提供一种光源系统和投影系统，旨在解决现有技术中光源系统亮度低、'彩虹'效应影响等的问题。
本发明的一种光源系统，其包括： 第一光源，用于产生第一宽谱光；第二光源，用于产生第二波长光；分光合光装置，位于第一光源和第二光源的光路上，用于将第一光源产生的第一宽谱光分成沿第一通道传播的第三波长光及沿第二通道传播的第四波长光，并将第二光源的至少部分第二波长光沿第二通道传播；第一空间光调制器，用于接收第一通道的光，并对第一通道传播的光进行调制；第二空间光调制器，用于接收第二通道的光，并对第二通道传播的光进行调制；控制器，与第一光源、第二光源、第一空间光调制器和第二空间光调制器电连接，用于控制第一光源和第二光源，并调制第一空间光调制器和第二空间光调制器；所述第一宽谱光和第二波长光的波谱覆盖范围不同。所述第三波长光及第四波长光的波谱覆盖范围不同。
优选的，所述第二光源发出的第二波长光为宽谱光。
优选的，所述第二波长光为青光，所述第一宽谱光为黄光。
优选的，所述第二光源包括：第二激发光源，用于产生第二激发光；第二波长转换装置，位于第二激发光的光路上，用于吸收激发光，产生受激光；第二驱动装置，用于驱动第二波长转换装置水平运动、垂直运动或圆周运动。
优选的，所述第二波长转换装置包括：波长转换层和基板；所述基板用于承载波长转换层。
优选的，所述第二波长转换装置包括：基板、波长转换层和散射层；所述基板用于承载波长转换层和散射层；所述波长转换层位于基板和散射层之间；或者所述散射层位于基板和波长转换层之间。
优选的，所述分光合光装置用于将第二波长光分成沿第一通道传播的第五波长光和沿第二通道传播的第六波长光。
优选的，所述控制器控制第一空间光调制器调制第三波长光和第五波长光，控制第二空间光调制器调制第四波长光和第六波长光。
优选的，所述分光合光装置包括第一反射镜、第一二向色元件、第二反射镜、 TIR 棱镜和 Philips 棱镜；所述第一反射镜和第二二向色元件平行放置，用于将第一宽谱光和第二波长光进行波长合光；所述第二反射镜，用于将第二波长光和第一宽谱光反射进入 TIR 棱镜；所述 Philips 棱镜，用于将 TIR 棱镜反射的光进行分光，分成分别沿第一通道传播的光和沿第二通道传播的光。
优选的，所述分光合光装置还包括：匀光装置，所述匀光装置位于第二二向色元件和第二反射镜之间，用于对第一宽谱光和第二波长光进行匀光。
优选的，所述第四波长光和第五波长光为同一颜色的不同主波长的光。
优选的，所述第二光源为固态半导体发光元件，其发出三基色光中的任一种光。
优选的，所述第而光源为激光二极管或激光二极管阵列。
优选的，所述分光合光装置包括第一二向色元件和第二二向色元件；所述第一二向色元件用于引导第一宽谱光分成沿第一通道传播的第三波长光和反射进入第二二向色元件的第四波长光；所述第二二向色元件用于引导第二波长光和第四波长光沿第二通道传播。
优选的，所述第二光源包括第二激发光源、散射装置和第二驱动装置；所述第二激发光源为固态半导体发光元件，器发射三基色光中的任一种光；所述散射装置位于第二激发光源的光路上，用于对第二激发光源发出的光进行散射；所述第二驱动装置用于驱动散射装置运动。上述任一技术方案，所述第一光源包括：第一激发光源、第一波长转换装置和第一驱动装置；所述第一激发光源用于产生激发光，所述第一激发光源为 固态半导体发光元件 ；所述第一波长转换装置设置在该激发光的光路上，用于吸收激发光产生受激光；所述第一驱动装置用于驱动第一波长转换装置运动。
优选的，所述第一波长转换装置包括：波长转换层和用于承载波长转换层的基板；所述波长转换层附着黄色荧光粉。
优选的，所述第一波长转换装置包括：波长转换层、散射层和用于承载波长转换层和散射层的基板；所述波长转换层位于散射层和基板之间。
优选的，所述第一激发光源为激光二极管或激光二极管阵列。
上述任一技术方案中，所述第一光源为固态半导体发光元件。
上述任一技术方案中，所述控制器控制第一光源和第二光源的依次开 / 断，所述第一光源和第二光源在同一周期内的开的状态不重合。
上述任一技术方案中，所述控制器控制第一光源和第二光源的开 / 断，所述第一光源和第二光源在同一周期内的开的状态有部分重合但不完全重合。
上述任一技术方案中，所述第一光源和第二光源在同一周期内的开 / 断至少为 N 次， N 为正整数。
本发明还包括一投影系统，该投影系统包括上述任一技术方案中的光源系统。
本发明的上述技术方案，通过采用宽谱光，通过控制器控制两个空间光调制器对宽谱光进行调制，实现宽谱光的分光同时被空间光调制器调制而无损失，从而提高光源系统的亮度；同时本发明采用两个空间光调制器在控制器的控制下对光进行调制，在保证光源系统亮度的同时，使得光源系统结构更简单，成本更低。
 附图说明
图 1 是本发明第一实施例中光源系统的结构示意图。
图 2 是本发明第一实施例中光谱图。
图 3 是本发明第一实施例中光源系统的部分结构示意图。
图 4 是本发明第一实施例中控制器的结构示意图。
图 5 是本发明第一实施例中控制器控制光源和空间光调制器的时序图。
图 6 是本发明第一实施例中控制器控制光源和空间光调制器的另一时序图。
图 7 是本发明第一实施例中控制器控制光源和空间光调制器的另一时序图。
图 8 是本发明第二实施例中光源系统的结构示意图。
图 9 是本发明第三实施例中光源系统的结构示意图。
图 10 是本发明第四实施例中光源系统的结构示意图。
图 11 是本发明第四实施例中波长转换装置的结构示意图。
图 12 是本发明第四实施例中光源系统的另一结构示意图。
图 13 是本发明第四实施例中波长转换装置的另一结构示意图。
图 14 是本发明第四实施例中控制器控制光源和空间光调制器的时序图。
 本发明的实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。
本发明所述的三基色光为红、绿、蓝三色光。本发明所述的一个周期是指一帧数据的处理时间。
本发明提出第一实施例关于光源系统，以下结合图 1 至图 7 进行说明。图 1 是本发明第一实施例中关于光源系统的结构示意图，该光源系统：第一光源 1 、第二光源 103 、分光合光装置 2 、第一空间光调制器 106 、第二空间光调制器 107 和控制器 108 。其中第一光源 1 和第二光源 103 位于分光合光装置 2 的同一侧，分光合光装置 2 位于第一光源 1 的出射光光路上，且位于第二光源 103 的出射光光路上。分光合光装置对第一光源 1 或第二光源 103 的光进行分光后，引导光进入第一空间光调制器 106 或第二空间光调制器 107 。控制器 108 与第一光源 1 、第二光源 103 、第一空间光调制器 106 和第二空间光调制器 107 电连接。其中：
（ 1 ）第一光源 1 产生第一宽谱光，该第一宽谱光为波长范围至少覆盖 10nm 的光，比如：黄光覆盖波长范围从 475nm~700nm （见图 2A ）、青光覆盖波长范围从 440nm~580nm （见图 2B ）。优选的，第一宽谱光的波长覆盖范围至少 30nm 。本发明的第一光源 1 采用宽谱光，通过波长分光能够实现宽光谱的光的分离成至少两束光，且该两束光为同一时序的光，这样不仅使得光源的结构简单（避免现有技术中使用多个光源），而且光的利用率也会显著提高（无需红色荧光粉激发产生红色激发光），同时，无需另加装置对光进行处理即滤光，即可得到基色光，从而使得结构更简单。比如：宽谱光黄光经过分光处理后可获得绿光和红光，宽谱光青光经过分光处理后可获得蓝光和绿光。
第一光源 1 包括用于产生激发光的激发光源 101 、波长转换装置 102 与第一驱动装置 100 。其中，波长转换装置 102 位于激发光源 101 的光路上；该第一驱动装置 100 用于驱动波长转换装置运动，。其中，激发光源 101 为固态半导体发光元件，优选的，该激发光源 101 可以产生蓝光或 UV 光等激发光；进一步优选的，激发光源 101 为可产生蓝光或 UV 光的激光二极管（ LD ）或 LED 或激光二极管与 LED 的组合。其中，激发光源可以是上述光源的阵列，也即 LD 阵列，或者 LED 阵列或者 LD 与 LED 的组合阵列。优选的，本发明的激发光源 101 采用 LD 作为激发光源。 LD 相对与 LED 作为激发光源不仅光学扩展量小，而且光密度高，光强度大。
该波长转换装置 102 包含基板和波长转换层，该基板用于承载波长转换层，该波长转换层可以为受激发后能够产生宽谱光的荧光粉，比如：黄色荧光粉、青色荧光粉、品红荧光粉等。优选的，当基板为圆形时，该波长转换层位于基板周边上并成圆环分布，或者当基板为矩形时，位于基板的表面上，成带状分布。该第一驱动装置 100 驱动波长转换装置 102 运动（圆周运动或水平运动或垂直运动），使得激发光在波长转换层上形成的光斑沿着预定路径作用于波长转换层。优选的，第一驱动装置 100 为马达，基板为圆形基板，马达位于基板的中心。
（ 2 ）第二光源 103 ，用于产生第二波长光，所述第二波长的光的光波长范围与第一宽谱光不同。其中，第二光源 103 的发光颜色无特殊限制，根据第一光源 1 的出射光来决定。第一光源 1 经过分光后所得的光和第二光源 103 组合产生至少三基色光。优选的，该第二光源 103 发出的光为三基色光中的任一中颜色（也即红、绿、蓝中的任一种）。比如：第一光源 1 为黄光，经分光后得红光和绿光，则第二光源 103 优选为蓝光；当第一光源 1 为青光，经分光后得绿光和蓝光，则第二光源 102 优选为红光，在此不一一列举。本实施例中，第二光源 103 可以为 LED 或者 LD 。优选的，第二光源 103 为激光二极管或激光二极管阵列，本技术方案中第二光源 103 采用激光二极管或激光二极管阵列，可以使得第二光源 103 的光学扩展量小，并且光源亮度高，同时，可以实现后续分光合光装置 2 的波长合光。
以下为了方便描述，本实施例中举例波长转换层为黄色荧光粉，第二光源 103 为发出的第二波长的光为蓝光。
（ 3 ）分光合光装置 2 ，用于将第一宽谱光分成沿第一通道 11 传播的第三波长光和沿第二通道 12 传播的第四波长光，并将至少部分第二波长光沿第二通道 12 传播。
分光合光装置 2 具体可包括：第一二向色元件 104 和第二二向色元件 105 。其中，第一二向色元件 104 位于第一空间光调制器 106 和第一光源 1 之间，第二二向色元件 105 位于第二光源 103 和第二空间光调制器 107 之间。第一光源 1 的出射光为黄光（也即黄色荧光粉被激发后，产生黄光），黄光到达第一二向色元件 104 后，被分成第三波长的光红色和第四波长的绿色。其中，第一二向色元件 104 被设计成透红光反绿光，第二二向色元件 105 被设计成透射蓝光反射绿光，红光沿着第一通道 11 到达第一光调制器 106 上，绿光被反射到第二二向色元件 105 后沿第二通道 12 进入第二光调制器 107 。
所述二向色元件为能够反射某一段波长的光，透射另外波段波长的光；或者是能够反射某一段或几段波长的光，透射另外波段波长的光。
（ 4 ）第一空间光调制器 106 ，用于对沿第一通道 11 传播的光进行调制。第二空间光调制器 108 ，用于对沿第二通道 12 传播的光进行调制。其中，所述的第一空间光调制器 106 和第二空间光调制器 107 可包括 DMD （ Digital Micromirror Device ，数字微镜装置）或 LCD （ Liquid Crystal Disp1ay ，液晶显示装置）或 LCOS （ Liquid Crysta1 on Si1icon ，液晶覆硅装置）等。
第一空间光调制器 106 对红光进行调制，第二空间光调制器 107 对时序的蓝光和绿光进行调制。其中，黄光是由黄色荧光粉受激而产生的，黄光经分光得红光和绿光，一方面，黄色荧光粉的高转换效率，另一方面，红光和绿光是同一时序的光，且能同时被利用，大幅提高了光源的转换效率和利用效率。当第一光源为青光时，青光被分成蓝光和绿光，第二光源提供红光，同样提高了光源的转换效率和利用率。
（ 5 ）控制器 108 ，用控制第一光源 1 和第二光源 103 进行，并对第一空间光调制器 106 和第二空间光调制器 107 进行调制。
如图 3 中，控制器 108 用来对第一光源 101 和第二光源 103 进行脉冲调制，实现第一光源 101 和第二光源 103 的亮度及开 / 断等的控制。控制器 108 对第一空间光调制器 106 和第二空间光调制器 107 的调制包括：光的时序调制和光输出的调制。
如图 4 所示，所述控制器 108 可包括数据处理模块 1081 和控制模块 1082 ，源数据输入到控制器 108 后，数据处理模块 1081 用来对源数据进行处理；控制模块 1082 用于对第一光源 101 和第二光源 103 的开 / 断进行控制，并根据光源的开 / 断来控制第一空间光调制器 106 和第二空间光调制器 107 对光进行调制。本实施例中的源数据包括视频或图像数据。
以下结合图 5 至图 7 ，对控制模块 1082 的控制过程或工作过程进行说明。该控制模块 1082 控制第一光源 1 和第二光源 103 的依次开 / 断，所述第一光源和第二光源在同一周期内的开的状态不重合。如图 5 中，在一个周期内，在前 0.3T ，控制模块 1082 控制第一光源 1 不发光，控制模块 1082 控制第二光源 103 发光，第二光源 103 的光（举例为蓝光）经过第二通道到达第二空间光调制器 107 上，控制模块 1082 控制第二空间光调制器 107 对蓝光进行调制后输出与视频或图像数据对应的蓝光；在 0.3T~1T ，控制模块 1082 控制第一光源 1 发光，控制第二光源 103 不发光，第一光源 1 中的激发光源 101 发出激发光，激发光到达波长转换装置 102 之后，激发波长转换装置 102 上的波长转换材料，产生受激光，举例受激光为黄光，分光合光装置将黄光分为红光和绿光，红光沿第一通道进入第一空间光调制器 106 中，绿光沿第二通道进入第二空间光调制器 107 中，控制模块 1082 控制第一空间光调制器 106 对红光进行调制后输出与视频或图像数据对应的红光，控制第二空间光调制器 107 对绿光进行调制后输出与视频或图像数据对应的绿光。其中，控制模块 1082 对空间光调制器的调制是根据数据处理模块 1081 处理的数据结果来实现的，更具体的说：针对输入的每一帧数据对应图像像素点上的 R 、 G 、 B 的值来控制第一空间光调制器 106 和第二空间光调制器 107 对到达其上的红、绿、蓝三色光的调制，从而使得从空间光调制器中输出的光的色度和的每一帧数据对应图像像素点上的 R 、 G 、 B 的值一一对应，从而可以保证图像显示时的高保真度。在图 5 中示出了控制模块 1082 控制第一光源和第二光源依次开 / 断。在实际应用中，第一光源和第二光源的开 / 断在同一周期 T 内时间上可以重叠，如图 6 所示。
在此，仅针对图 6 与图 5 中的不同之处做说明。控制模块控制第一光源和第二光源的开 / 断，第一光源 1 和第二光源 103 在同一周期内的开的状态至少有部分重合。图 6 所示，在同一周期中，第一光源 1 和第二光源 103 的点亮可以时段可重合，比如在时间段 0.3T~0.4T 内，第一光源 1 和第二光源 103 均为开的状态（图 6A 与图 6B 所示），此时，第一空间光调制器 106 在 0.3T~0.4T 内对红光进行调制（图 6C 所示），第二空间光调制器 107 对青光进行调制（图 6D 所示），其中青光为蓝光和绿光的合光，这种调制模式可以提高空间光调制器的输出的光的亮度。该调制模式相当于增加了一种基色青光，扩展了色域，提高了输出亮度。
当然，第一光源 1 和第二光源 103 在同一周期内的开 / 断至少为 N 次（ N 为正整数），结合如图 7 进行说明。控制模块 1082 对第一光源 1 和第二光源 103 进行 PWM 调制，第一光源 1 和第二光源 103 的占空比无特殊限制，比如第一光源 1 的占空比为 60% ，第二光源 103 的占空比可以为 40% 或 50% 等等。本技术方案中，通过提高颜色在时序上的切换速度，可以消除'彩虹'效应。
本实施例中，第一光源 1 产生宽谱光，第二光源 103 为三基色光中的任一种光，控制器对两个光源进行控制，并对空间光调制器进行调制，使得第一光源 1 的光和第二光源 103 的光均被利用，从而提高光源的转换效率，同时空间光调制器能够同时进行工作，对不同颜色的光进行同时调制，提高了基色光的切换速率，有效避免了'彩虹'效应的出现。另外，采用两个空间光调制器，兼顾光源系统输出光的亮度的同时，使得该系统结构相对简单，成本较低。
本发明提出第二实施例关于光源系统。以下结合图 8 进行说明。光源系统包括第一光源 801 ，第二光源 802 ，分光合光装置 2 ，第一空间光调制器 805 ，第二空间光调制器 806 和控制器 807 。
本实施例与第一实施例的区别在于，第一光源 801 包括混合光源，该混合光源产生的混合光经分光合光装置 2 分光后能够产生至少两色光。分别沿第一通道 81 和第二通道 82 进入第一空间光调制器和第二空间光调制器。所述混合光源为固态半导体发光元件，优选为 LED 或激光二极管的混合光源。比如包含三基色光中的任两种颜色光的 LED 光源，或者 LED 芯片表面覆盖波长转换材料，或者包含三基色光中的任两种颜色光的 LED 光源和激光光源的混合光源。其中，采用 LED 光源和激光光源的混合光源，不仅可以提高光源的亮度，而且可以得到宽谱光。控制器 807 控制第一光源 801 中混合光源的同时开 / 断。混合光源的光直接到达分光合光装置 2 中的第一二向色元件 803 ，被分成沿第一通道传播的红光和沿第二通道传播的绿光。本实施例的技术方案，光源系统的光源可以为混合光源，且无需波长转换装置，从而使得结构更简单，并且光源系统的整体的亮度大幅提高。
本发明提出第三实施例关于光源系统。以下结合图 9 进行说明。光源系统包括第一光源 1 ，第二光源 904 ，分光合光装置 2 ，第一空间光调制器 907 ，第二空间光调制器 908 和控制器 909 。
本实施例与第一实施例的区别在于，第一光源 1 包括用于发射激发光的激发光源 901 、用于接收激发光产生受激光波长转换装置 902 以及分光滤光片 903 。其中，波长转换装置 902 可以是透射式的，也可以是反射式的。当波长转换装置 902 为透射式的时，激发光源 901 位于波长转换装置 902 覆盖有波长转换层的一侧或相对侧（远离分光合光装置 2 的一侧），分光滤光片 903 位于波长转换装置 902 和激发光源 901 之间。该分光滤光片 903 透射激发光反射受激光，从而使得入射到分光滤光片 903 的受激光被反射成为第一光源的出射光，提高出射光的亮度。当波长转换装置 902 为反射式时，激发光源 901 和分光滤光片 903 位于波长转换装置 902 的同一侧，分光滤光片 903 位于受激光的光路上，激发光源 901 产生的激发光斜射到波长转换装置上，该分光滤光片 903 用于透射受激光，反射激发光，从而将入射到分光滤光片 903 上未被利用的激发光反射回波长转换装置 902 上，再次激发波长转换装置 902 上的波长转换材料，使得激发光充分利用，产生更多的受激光，从而提高出射光的亮度。
另外，本实施例中的光源系统还可以包括一个或多个透镜，该透镜用于对光束进行汇聚或收集，从而减少光在传播过程中的损失，提高光的利用率。其中，透镜可以位于激发光源和波长转换装置之间、波长转换装置与分光滤光片之间、第一光源和分光合光装置之间、第二光源和分光合光装置之间等。光源系统中使用透镜的个数无特殊限制，根据收光和汇聚光的需要设置透镜的位置即可。
本发明的上述三个实施例中，分光合光装置采用波长合光的方式对第一宽谱光和第二波长光进行合光，不增加光学扩展量，从而提高投影系统的光效与亮度。
本发明提出第四实施例关于光源系统。以下结合图 10 进行说明。本实施例中的光源系统包括第一光源 1 、第二光源 3 、分光合光装置 2 、第一空间光调制器 1013 、第二空间光调制器 1014 和控制器 1015 。其中，所述分光合光装置 2 位于第一光源 1 和第二光源 3 的光路上，将第一光源 1 和第二光源 2 的光进行分光或合光后传播到第一空间光调制器 1013 和第二空间光调制器 1015 ，该控制器 1015 与第一光源 1 、第二光源 3 、第一空间光调制器 1013 、第二空间光调制器 1014 电连接，用于对第一光源 1 、第二光源 3 进行控制，用于对第一空间光调制器 1013 、第二空间光调制器 1014 进行调制。
（ 1 ）第一光源 1 产生第一宽谱光，所述第一宽谱光为波长范围至少覆盖 10nm 的光。优选的，第一宽谱光的波长范围覆盖 30nm 的光。本实施例中，所述第一光源 1 可包括第一激发光源 1001 和第一波长转换装置 1002 。所述第一激发光源 1001 优选为固态半导体发光元件，用于发出激发光，所述激发光可以为蓝光或 UV 光等。所述第一波长转换装置 1002 上设置有波长转换层（该波长转换层包括荧光材料），第一波长转换装置 1002 受激发光激发后，产生不同于激发光的受激光。如图 11 所示，荧光材料涂覆在波长转换装置 1002 的环形区域 102 内，形成波长转换层。所述荧光材料可以为品红、红、绿、青、黄色荧光粉；在本实施例中，波长转换层优选为黄色荧光粉，该黄色荧光粉被激发光激发后，产生黄光。黄光的波长范围为 567nm~617nm 。当然，本实施例中的第一光源 1 还可包括第一驱动装置，该驱动装置用于驱动第一波长转换装置 1002 运动。优选的，该第一驱动装置为马达。其中，所述第一激发光源 1001 位于第一波长转换装置 1002 的一侧，第一激发光源 1001 产生的激发光能够入射到第一波长转换装置 1002 的荧光材料上，该第一驱动装置位于第一波长转换装置 1002 不同于波长转换层所在的区域上。
（ 2 ）第二光源 3 可以为产生宽谱光的光源或者产生三基色光中的任一种光。其中三基色光为红、绿、蓝；宽谱光的波长范围覆盖至少 10nm 的光。
一方面，当第二光源 3 产生的光为三基色光中的任一种光时，如图 10 所示，第二光源 3 可包括第二激发光源 1003 ，第二激发光源 1003 发出的光优选为蓝光。其还可以包括散射装置 1004 ，位于第二激发光源 1003 的光路上，用于消除第二激发光源 1003 的相干特性，从而减少'散斑'现象。其中，散射装置 1004 可包括一透性基板，基板上设置有散射材料；或者散射装置包括一透性散射基板，该透性散射基板由散射材料制成。由于光透射到物体上均会产生热量，所述散射装置 1004 还可包括一马达，用于驱动基板运动，从而使得散射元件 1004 运动，避免热量在散射装置 1004 某一点上聚集大量的热，而影响散射装置散射的效率。本技术方案中，散射装置 1004 具有散射功能的区域设置在第二激发光源 1003 的光路上，利用该散射装置，可以有效的避免最终出射光出现'散斑'的现象。
另一方面，当第二光源 3 产生宽谱光时，如图 12 和图 13 所示，其可包括第二激发光源 1203 、波长转换装置 1204 ，其中，波长转换装置 1204 位于第二激发光源 1203 的光路上，第二激发光源 1203 可以为能够产生蓝光或 UV 光等的固态半导体发光元件，该第二激发光源 1203 用于发出激发光，波长转换装置 1204 包括一在基板 1303 上设置有波长转换层 1301 的装置，该基板 1303 可以是透性基板，也可以是反射性基板，在此无特殊限制，本实施例中的图 12 给出的是具有透性基板 1303 的波长转换装置 1204 （反射性基板的波长转换装置的结构可参见图 9 中的第一光源的结构）。波长转换层 1301 优选为包含品红荧光粉或青色荧光粉。波长转换层 1301 涂覆在基板 1303 的外圆周上。进一步的，该波长转换装置 1204 还可包括一散射层 1302 ，该散射层 1302 可位于波长转换层 1301 和基板 1303 之间，或者波长转换层 1301 位于散射层 1302 和基板 1303 之间，该散射层 1302 可以使得第二光源 3 的出射光更均匀，从而可以避免最终输出光出现'散斑'的现象。另外，所述散射层 1302 和波长转换层 1301 也可以为同一层，也即散射材料和波长转换材料混合，制成一层波长转换散射层，该技术方案可以使得波长转换装置 1204 的结构更简单，并且散射更均匀。
另外，在波长转换装置 1204 与第二激发光源 1203 之间以及在第二光源 3 的出射光路上均可包括一透镜，该透镜用来收集或汇聚光，减少光扩散造成的损失，从而可以提高第二光源 3 的出射光的亮度。
（ 3 ）分光合光元件 2 用于将第一宽谱光分成沿第一通道传播的第三波长光和沿第二通道传播的第四波长光，并将至少部分第二波长光沿第二通道传播。
本实施例中，分光合光元件 2 包括按照光路传播方向依次设置的第一反射镜 1006 、二向色元件 1005 、第一聚焦透镜 1007 、匀光装置 1008 、第二聚焦透镜 1009 、第二反射镜 1010 、 TIR 棱镜 1011 及 Philips 棱镜 1012 。其中，第一二向色元件 1006 位于第二光源 3 的出射光的光路上，用于将第二光源 3 的出射光反射到二向色元件 1005 上，二向色元件 1005 位于第一光源 1 的出射光的光路上（此处称第一光路），用于透射第一光源的出射光，并反射第二光源 3 的出射光沿第一光路传输。第一聚焦透镜 1007 用于汇聚第一光路的光。优选的，所述匀光装置 1008 包括但不限于匀光棒。匀光装置 1008 位于第一光路上，用于对第一光路的光进行进一步的匀光。第二聚焦透镜 1009 位于第一光路上，用于对第一光路的光进行进一步的聚焦。第二反射镜 1010 用于反射第一光路的光使其入射到 TIR 棱镜 1011 上。 TIR 棱镜用于反射第一光路的光到 Philips 棱镜上， Philips 棱镜用于将第一光源的出射光分成沿第一通道传播的第三波长光和沿第二通道传播的第四波长光，并将第二光源的出射光（第二波长光）至少部分沿第二通道传播。当第二光源的出射光为宽谱光时， Philips 棱镜用于将第二光源的出射光分成沿第一通道传播的第五波长光和沿第二通道传播的第六波长光。其中，所述第四波长光和第五波长光可以为同一颜色的不同主波长光，该方案可以提高光源系统的色域范围。另外，当第一光源和第二光源的出射光的颜色相同时，由于波谱范围不同，从而可以有效的将第一光源和第二光源的出射光进行波长合光，不增加光学扩展量，提高光效。
（ 4 ）空间光调制器包括第一空间光调制器 1013 和第二空间光调制器 1014 。第一空间光调制器 1013 用于对第一通道传播的光进行调制；第二空间光调制器 1014 ，用于对沿第二通道传播的光进行调制。
（ 5 ）控制器 1015 用于控制第一光源 1001 和第二光源 1003 ，以及对第一空间光调制器 1013 和第二空间光调制器 1014 的调制。其中，控制器 1015 用来对第一光源 1001 和第二光源 1003 进行脉冲调制，实现第一光源 1001 和第二光源 1003 的亮度及开 / 断等的控制。控制器 1015 对第一空间光调制器 1013 和第二空间光调制器 1014 的调制包括：光出射量多少的调制。
以下结合图 14 ，对控制器 1015 的控制过程或工作过程进行说明。为了方便说明，在此实施例中，将第一光源的出射光举例为黄光，第二光源的出射光举例为青光。其中黄光经分光合光装置的分光后得红光和第一绿光，青光经分光合光装置的分光后得第二绿光和蓝光。在一个周期内，在前 0.3T ，控制器 1015 控制第一光源 1 不发光，控制器 1015 控制第二光源 3 发光，第二光源 3 的光经过 Philip 棱镜分光后，蓝光通过第二通道到达第二空间光调制器上，第二绿光通过第一通道到达第一空间光调制器上，控制器 1015 控制第二空间光调制器对蓝光进行调制，并控制第一空间光调制器对第二绿光进行调制（该调制是根据控制器对源数据处理后的结果进行的）；在 0.3T~1T ，控制器 1015 控制第一光源 1 发光，控制第二光源 3 不发光，第一光源 1 出射光为黄光，黄光经 Philips 棱镜后被分为红光和第一绿光，第一绿光沿第一通道进入第一空间光调制器中，红光沿第二通道进入第二空间光调制器中，控制器 1015 控制第一空间光调制器对红光进行调制，控制第二空间光调制器对第一绿光进行调制。其中，第一绿光和第二绿光为同一颜色的不同主波长的光，但经过合色后，可以得到绿色基色光。在实际应用中，第一光源的出射光和第二光源的出射光均可以是任意的宽谱光（经分光后所得基色光至少包括三基色光即可），第一光源和第二光源的出射光经分光后，经过分光合光装置先合光，再经棱镜分光，第一光源经分光可得两个不同颜色的基色光，第二光源经分光后可得两个不同颜色的基色光，其中，第一光源分出的某一基色光和第二光源分出的某一基色光经合光后可以成为一基色光，这样可以提高光源的色域覆盖范围，从而使得光源系统输出光到达显示区图像更逼真。在本实施例中，第一光源的出射光可以为黄色，第二光源的出射光为品红，第一光源和第二光源的出射光的颜色也可以互换，其具体分光合光见前述实施例。
在图 12 中示出了控制模块 1082 控制第一光源和第二光源依次开 / 断，在实际应用中，第一光源和第二光源的开 / 断在同一周期 T 内时间上可以重叠，并且在同一周期 T 内均可以开 / 断 N 次（ N 为正整数），第一光源和第二光源在同一周期 T 内多次开 / 断，提高了光的切换频率，从而可以有效克服'彩虹'效应。
本实施例的上述技术方案，通过采用两个宽谱光，经分光合光装置分光后进入两个空间光调制器上，光源的光无损失，且两个空间光调制器同一时间段分别对不同颜色的光进行调制，使得光源的亮度进一步增强，另外，两个空间光调制器同时对光进行处理，提高了三基色的切换速率，从而避免了'彩虹'效应。
本发明还可包括一投影系统，其包括上述任一实施例中的光源系统。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或者直接、间接运用在其他相关的技术领域，均视为包括在本发明的专利保护范围内。

Claims (24)

  1. 一种光源系统，其特征在于，包括：
    第一光源，用于产生第一宽谱光；
    第二光源，用于产生第二波长光；
    分光合光装置，位于第一光源和第二光源的光路上，用于将第一光源产生的第一宽谱光分成沿第一通道传播的第三波长光及沿第二通道传播的第四波长光，并将第二光源产生的至少部分第二波长光沿第二通道传播；所述第三波长光及第四波长光的波谱覆盖范围不同；
    第一空间光调制器，用于接收第一通道的光，并对第一通道传播的光进行调制；
    第二空间光调制器，用于接收第二通道的光，并对第二通道传播的光进行调制；
    控制器，与第一光源、第二光源、第一空间光调制器和第二空间光调制器电连接，用于控制第一光源和第二光源，并调制第一空间光调制器和第二空间光调制器；
    所述第一宽谱光和第二波长光的波谱覆盖范围不同。
  2. 根据权利要求 1 所述的光源系统，其特征在于，所述第二波长光为宽谱光。
  3. 根据权利要求 2 所述的光源系统，其特征在于，所述第二波长光为青光，所述第一宽谱光为黄光。
  4. 根据权利要求 2 所述的光源系统，其特征在于，所述第二光源包括：
    第二激发光源，用于产生第二激发光；
    第二波长转换装置，位于第二激发光的光路上，用于吸收激发光，产生受激光；
    第二驱动装置，用于驱动第二波长转换装置水平运动、垂直运动或圆周运动。
  5. 根据权利要求 4 所述的光源系统，其特征在于，所述第二波长转换装置包括：波长转换层和基板；
    所述基板用于承载波长转换层。
  6. 根据权利要求 4 所述的光源系统，其特征在于，所述第二波长转换装置包括：基板、波长转换层和散射层；
    所述基板用于承载波长转换层和散射层；
    所述波长转换层位于基板和散射层之间；或者所述散射层位于基板和波长转换层之间。
  7. 根据权利要求 2 所述的光源系统，其特征在于，所述分光合光装置用于将第二波长光分成沿第一通道传播的第五波长光和沿第二通道传播的第六波长光。
  8. 根据权利要求 7 所述的光源系统，其特征在于，所述控制器控制第一空间光调制器调制第三波长光和第五波长光，控制第二空间光调制器调制第四波长光和第六波长光。
  9. 根据权利要求 7 所述的光源系统，其特征在于，所述分光合光装置包括第一反射镜、第一二向色元件、第二反射镜、 TIR 棱镜和 Philips 棱镜；
    所述第一反射镜和第二二向色元件平行放置，用于将第一宽谱光和第二波长光进行波长合光；
    所述第二反射镜，用于将第二波长光和第一宽谱光反射进入 TIR 棱镜；
    所述 Philips 棱镜，用于将 TIR 棱镜反射的光进行分光，分成分别沿第一通道传播的光和沿第二通道传播的光。
  10. 根据权利要求 9 所述的光源系统，其特征在于，所述分光合光装置还包括：匀光装置，所述匀光装置位于第二二向色元件和第二反射镜之间，用于对第一宽谱光和第二波长光进行匀光。
  11. 根据权利要求 8 所述的光源系统，其特征在于，所述第四波长光和第五波长光为同一颜色的具有不同主波长的光。
  12. 根据权利要求 1 所述的光源系统，其特征在于，所述第二光源为固态半导体发光元件，其发出三基色光中的任一种光。
  13. 根据权利要求 12 所述的光源系统，其特征在于，所述分光合光装置包括第一二向色元件和第二二向色元件；
    所述第一二向色元件用于引导第一宽谱光分成沿第一通道传播的第三波长光和反射进入第二二向色元件的第四波长光；
    所述第二二向色元件用于引导第二波长光和第四波长光沿第二通道传播。
  14. 根据权利要求 12 所述的光源系统，其特征在于，所述第二光源包括第二激发光源、散射装置和第二驱动装置；
    所述第二激发光源为固态半导体发光元件，其发射三基色光中的任一种光；
    所述散射装置位于第二激发光源的光路上，用于对第二激发光源发出的光进行散射；
    所述第二驱动装置用于驱动散射装置运动。
  15. 根据权利要求 12 所述的光源系统，其特征在于，所述第二光源为激光二极管或激光二极管阵列。
  16. 根据权利要求 1 至 15 中任一项所述的光源系统，其特征在于，所述第一光源包括：第一激发光源、第一波长转换装置和第一驱动装置；
    所述第一激发光源用于产生激发光，所述第一激发光源为 固态半导体发光元件 ；
    所述第一波长转换装置设置在该激发光的光路上，用于吸收激发光产生受激光；
    所述第一驱动装置用于驱动第一波长转换装置运动。
  17. 根据权利要求 16 所述的光源系统，其特征在于，所述第一波长转换装置包括：波长转换层和用于承载波长转换层的基板；
    所述波长转换层附着黄色荧光粉。
  18. 根据权利要求 16 所述的光源系统，其特征在于，所述第一波长转换装置包括：波长转换层、散射层和用于承载波长转换层和散射层的基板；
    所述波长转换层位于散射层和基板之间。
  19. 根据权利要求 16 所述的光源系统，其特征在于，所述第一激发光源为激光二极管或激光二极管阵列。
  20. 根据权利要求 1 至 15 中任一项所述的光源系统，其特征在于，所述第一光源为固态半导体发光元件。
  21. 根据权利要求 1 至 15 中任一项所述的光源系统，其特征在于，所述控制器控制第一光源和第二光源的依次开 / 断，所述第一光源和第二光源在同一周期内的开的状态不重合。
  22. 根据权利要求 1 至 15 中任一项所述的光源系统，其特征在于，所述控制器控制第一光源和第二光源的开 / 断，所述第一光源和第二光源在同一周期内的开的状态有部分重合但不完全重合。
  23. 根据权利要求 1 至 15 中任一项所述的光源系统，其特征在于，所述第一光源和第二光源在同一周期内的开 / 断至少为 N 次， N 为正整数。
  24. 一种投影系统，其特征在于，包括权利要求 1 至 23 中任一项所述的光源系统。
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