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WO2018170987A1 - 投影系统 - Google Patents

投影系统 Download PDF

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Publication number
WO2018170987A1
WO2018170987A1 PCT/CN2017/081312 CN2017081312W WO2018170987A1 WO 2018170987 A1 WO2018170987 A1 WO 2018170987A1 CN 2017081312 W CN2017081312 W CN 2017081312W WO 2018170987 A1 WO2018170987 A1 WO 2018170987A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
color
module
projected
projection system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/081312
Other languages
English (en)
French (fr)
Inventor
郭祖强
胡飞
李屹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Appotronics Corp Ltd
Original Assignee
Appotronics Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Appotronics Corp Ltd filed Critical Appotronics Corp Ltd
Publication of WO2018170987A1 publication Critical patent/WO2018170987A1/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
    • 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
    • G03B21/206—Control of light source other than position or intensity

Definitions

  • the present invention relates to the field of projection technology, and in particular, to a projection system.
  • the conventional light source includes a bulb source such as a UHP or a xenon lamp, and an LED light source, an RGB pure laser light source, and a laser-excited phosphor light source are gradually developed, and the latter can be considered as a semiconductor light-emitting device. light source.
  • RGB laser source Due to the limited amount of optical expansion, the projection system of the LED light source has insufficient brightness, and is limited in many fields, especially in theater applications where brightness is required.
  • the common contrast is RGB laser source and laser phosphor source.
  • RGB laser source has the advantages of high color purity and wide color gamut. It can generally reach the REC2020 color gamut standard, but its speckle problem is difficult to solve.
  • the light source that excites the phosphor does not have speckle problems, and the visual performance is good, and the DCI standard can generally be achieved in terms of color gamut. For most cases of actually viewing images, the DCI gamut is sufficient. It can be imagined that the captured image comes from nature, life around, etc.
  • the object has a certain color, from the spectrum of its reflection, the spectrum of the general reflection will be a relatively continuous spectrum with a certain width. Therefore, the color of the object will fall within the DCI gamut unless there is a situation where the camera directly captures a pure laser beam, such as a 532 nm green laser beam and a 638 nm red laser beam, at which point the DCI gamut cannot be restored.
  • the intrinsic color of these two laser beams which is also considered to be a place where the laser fluorescent light source is not as good as the RGB pure laser light source, so how to make the laser fluorescent light source also have a color gamut beyond the DCI while maintaining its high luminous efficiency.
  • Existing pure laser projectors can achieve a large color gamut of REC2020, while the color gamut range of laser phosphor technology projectors is DCI709, although most of the colors in nature are in the DCI gamut, but in certain cases For example, when the color of a pure laser is displayed, it will be outside the DCI gamut. When the projector of the existing laser phosphor technology displays the color, the color display beyond the DCI gamut is not realistic.
  • the projection image with high fidelity has become a reference standard for consumers to pursue projection products.
  • the color gamut range of the existing laser phosphor technology satisfies the conventional color display in nature, but the special image color will be outside the DCI color gamut. If the DCI color gamut is used for display, it is outside the DCI color gamut. Colors can only be displayed with colors on the DCI gamut boundaries, but different color differences are not reflected. Eventually the color display that is not within the DCI gamut is distorted.
  • the present invention provides a projection system that can effectively widen the color gamut.
  • a projection system comprising:
  • Light source device including
  • a first light source for emitting a first light for modulating an image, the first light being used to modulate an image within a first color gamut
  • a second light source for emitting complementary light that broadens a color gamut of the at least one color light of the first light emitted by the first light source, the complementary light being used to modulate a second color gamut range together with the first light Image inside
  • a light modulation module configured to image modulate light emitted by the light source device according to image data to generate non-projected light and projection light required for an image to be displayed;
  • a projection lens for receiving the projection light to project an image
  • a light recycling module configured to recycle the non-projected light to the optical modulation module for reuse.
  • the light modulation module modulates the supplemental light to generate projected light such that the projected image is
  • the color gamut is effectively broadened to improve the color distortion of the picture, so the color gamut of the projection system is wider, the picture color is realistic, and the display effect is better.
  • the projection system further has a light recycling module, and the light recycling module can recycle the non-projected light to the light modulation module for reuse, which can improve the light utilization efficiency of the projection system.
  • FIG. 1 is a schematic structural view of a projection system according to a first embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a color wheel of the projection system shown in FIG. 1.
  • FIG. 3 is a schematic diagram of a color gamut range of the projection system shown in FIG. 1.
  • FIG. 4 is a schematic view showing the structure of a first light combining element of the projection system shown in FIG. 1.
  • Fig. 5 is a schematic structural view of a projection system according to a second embodiment of the present invention.
  • Fig. 6 is a schematic structural view of a projection system according to a third embodiment of the present invention.
  • Figure 7 is a schematic view showing the structure of the color wheel of the projection system shown in Figure 6.
  • Fig. 8 is a schematic structural view of a projection system according to a fourth embodiment of the present invention.
  • FIG. 9 is a schematic structural view of a projection system according to a fifth embodiment of the present invention.
  • Projection system 100 200, 300, 400, 500
  • FIG. 1 is a schematic structural diagram of a projection system 100 according to a first embodiment of the present invention.
  • the projection system 100 includes a light source device 110, a light source controller 120, an optical processing component 130, a light modulation module 140, a color gamut determination module 150, a light recovery module 160, and a projection lens 170.
  • the light source device 110 includes a first light source 111, a second light source 112, and a first light combining element 113.
  • the first light source 111 is used to emit a first light
  • the first light is used to modulate an image
  • the first light is capable of modulating an image within the first color gamut range F1.
  • the second light source 112 is configured to emit supplemental light that widens a color gamut of the first light source 111 to emit at least one of the first light, the supplementary light being used to co-modulate the second light with the first light An image within the gamut range F2.
  • the first light combining element 113 is configured to combine the first light and the supplementary light, so that the light source device 110 emits the combined light of the first light and the supplementary light as the light source device The light emitted by 110.
  • the first light source 111 includes a light-emitting element 114 for emitting excitation light, and a color wheel 115 located on an optical path where the excitation light emitted by the light-emitting element 114 is located, the color wheel 115 includes at least two segmentation regions, the at least two segmentation regions receiving the excitation light and correspondingly emitting the first light, wherein the first light comprises at least two color lights, each segment region corresponding to Give a color of light.
  • the light-emitting element 114 is an excitation light source that emits the excitation light under the control of the light source controller 120.
  • the light emitting element 114 may be disposed on one side of the color wheel 115.
  • the light-emitting element 114 may be a blue light source that emits blue excitation light, but it is understood that the light-emitting element 114 is not limited to a blue light source, and may be a red light source, a green light source, an ultraviolet light source, or the like.
  • the light-emitting element 114 includes a blue laser for emitting blue laser light as the excitation light. It can be understood that the light-emitting element 114 may include one, two or more blue lasers, specifically The number of lasers can be selected according to actual needs.
  • FIG. 2 is a schematic structural view of the color wheel 115 shown in FIG.
  • the color wheel 115 includes at least two segmented regions (e.g., R, G, B) disposed in a circumferential direction, each segmented region for emitting a color of light.
  • the color wheel 115 can be rotated along the center of the color wheel 115 such that the at least two segmented regions (such as R, G, B) are periodically located on the optical path where the excitation light emitted by the light-emitting element 114 is located.
  • the at least two segmented regions eg, R, G, B
  • the size of the at least two segment regions can be set to be the same or different according to actual needs.
  • the color wheel 115 includes three segmented regions sequentially disposed in the circumferential direction, which are a first segment region B, a second segment region R, and a third segment region G, respectively.
  • the first segment area B is used to emit a first color light, such as blue light, and when the light emitting element is a blue light source, the first segment area B may be provided with a scattering material, and the light emitting element Light emitted by 114 may be scattered through the first segment region B and then emitted.
  • the first segment region B may be provided with a first wavelength conversion material, and the light emitted by the light-emitting element 114 may excite the first The wavelength converting material produces the first color light, such as blue light.
  • the second segment region R is used to emit second color light, such as red light, and the second segment region R may be disposed with a second wavelength converting material, such as a red phosphor, emitted by the light emitting element 114.
  • a second wavelength converting material such as a red phosphor
  • Light may excite the second wavelength converting material to generate the second color light, ie, red light
  • the third segment region G is used to emit a third color light, such as green light
  • the third segment region A third wavelength converting material, such as a green phosphor may be disposed on G, and the light emitted by the light emitting element 114 may excite the third wavelength converting material to generate the third color light, that is, green light.
  • the number of segmented regions of the color wheel 115 may also be two (such as two segmented regions that respectively emit blue light and yellow light), and four (eg, blue and green respectively). , four, six, etc. of yellow, red light, not limited to the above, the segmented area of the color wheel 115 may also have two or more segmented areas emitting the same color Light or the like, that is, the number of segment regions of the color wheel 115 and the color of the converted light emitted can be selected according to actual needs.
  • the light-emitting element 114 can directly emit the first light, such as the light-emitting element 114 includes light-emitting elements of at least two colors, so that the color wheel 115 can be omitted.
  • the color wheel 115 is a transmissive color wheel, that is, the color wheel 115 receives the excitation light and the other side emits the first light, and the first light is guided to the The first light combining element 113, however, in the modified embodiment, the color wheel 115 may also be a reflective color wheel, that is, the same side of the color wheel 115 receives the excitation light and emits the first light.
  • the first light is guided to the first light combining element 113; or the color wheel 115 may also be a reflective color wheel or a transflective color wheel (eg, a partially segmented area is a transmissive area) The other part of the segmented area is a reflective area.
  • the color wheel 115 is a reflective color wheel or a transflective color wheel
  • the optical path and the positional relationship between the light-emitting element and the color wheel can also be designed according to actual needs. Adjustment, the optical path and positional relationship between the different types of color wheel and the light-emitting element will not be described here.
  • the second light source 112 is a supplemental light source that emits supplemental light under the control of the light source controller 120.
  • the second light source 112 is disposed on a side of the color wheel 115 opposite to the first light source 111, that is, the light emitting element 114 and the second light source 112 are located at the color wheel 115.
  • the light emitted by the light-emitting element 114 is converted into the first light via the color wheel 115 and then supplied to the first light-combining element 113, and the complementary light emitted by the second light source 112 is guided to the
  • the first light combining element 113 is described such that the first light and the complementary light are combined at the first light combining element 113.
  • the light-emitting element 114 and the first light source 111 may be disposed on the same side of the color wheel 115, such as the excitation light emitted by the light-emitting element 114 and the second light source 112.
  • the supplemental light is guided to the color wheel 115, and the first light and the supplementary light are emitted by the color wheel 115 as the light emitted by the light source device 110.
  • the second light source 112 may include at least one laser for emitting laser light of at least one color as the supplemental light.
  • the second light source 112 may include a first laser and a second laser respectively emitting a first supplemental light and a second supplemental light, the first supplemental light being different in color from the second supplemental light.
  • the second light source 112 may also include only one type of laser to emit only one color of complementary light; or the second light source 112 may also include three kinds of lasers to emit three colors. Light complements the light. It can be understood that the kind of the laser of the second light source or the color quantity of the supplementary light can be determined according to the color gamut color that needs to be widened.
  • the second light source 112 can include a red laser to emit red complementary light. If the green color gamut needs to be broadened, the second light source 112 may include a green laser to emit green supplemental light. If the red color gamut and the green color gamut need to be widened, the second light source may include a red laser to emit red complementary light, and includes The green laser emits green supplemental light.
  • the light-emitting element 114 is a blue laser
  • the color wheel 115 is provided with a fluorescent material for receiving blue excitation light (such as blue and laser light) emitted by the light-emitting element 114 and emitting the first a light
  • the first light may include the blue excitation light emitted by the light emitting element 114 or the blue excitation light after scattering
  • the fluorescent material is excited by the blue excitation light Red light and green light.
  • the second light source 112 includes a first laser that emits red supplemental light and a second laser that emits green supplemental light.
  • the number of the first laser and the second laser may also be one, two or more, and may be selected according to actual needs.
  • the color gamut judging module 150 is configured to receive image data, and according to the image data (such as a sub-frame image data, specifically may be a sub-frame red image data corresponding to a red image or a sub-frame green corresponding to a green image. Image data, etc.) determining a color gamut range of an image to be displayed (such as a sub-frame to be displayed, specifically a sub-frame red image to be displayed or a sub-frame green image to be displayed, etc.), and according to the color gamut range
  • a control signal is output to control the opening and closing of the first light source and the second light source by the light source controller 120.
  • the color gamut determining module 150 determines that the color gamut range of the image to be displayed falls within the first color gamut range F1
  • the first color gamut range F1 is a color gamut range that the first light can display. Then, the color gamut determining module 150 outputs a control signal to the light source controller 120 to control the first light source 111 to be turned on, and the light modulation module 140 modulates the first light to generate projection light according to the image data.
  • the color gamut determining module 150 determines that at least part of the color gamut range of the image to be displayed is in the second color gamut range, the second color gamut range is a color gamut range outside the first color gamut range, and the The second color gamut is in a range of color gamut that the supplemental light and the first light can exhibit together, and that the image data in the second color gamut can be first light emitted by the first light source Formed by the second light emitted by the second light source, the color gamut determining module 150 outputs a control signal to the light source controller 120 to control at least the second light source 112 to be turned on (ie, only the first A light source 111 is turned on to control both the first light source 111 and the second light source 112 to be turned on, and the light modulation module 140 modulates at least the supplemental light according to the image data (when the first light source 111 is When the second light source 112 is turned on, that is, the first light and the supplementary light are modulated to generate the projection light.
  • the first color gamut range F1 may be a color gamut range that the first light can display, which may be a DCI color gamut range, such as a color gamut range DCI709,
  • the supplemental light emitted by the second light source 112 may emit light exceeding the first color gamut range F1.
  • the complementary light emitted by the second light source 112 may exhibit a REC color.
  • the domain range F such as the gamut range REC2020, may be wider than the first gamut range F1, such as the gamut range of the REC 2020.
  • a second color gamut range F2 is defined, and the second color gamut range F2 is a REC gamut range other than the first gamut range F1, and is a gamut range that the supplemental light can display.
  • the first light may include a blue laser of the light emitting element 114 exciting red and green fluorescent light generated by the red, green wavelength conversion material on the color wheel 115, and The blue laser light of the light-emitting element that transmits, scatters, or reflects the color wheel 115.
  • the red fluorescence and the green fluorescence are obtained by exciting the wavelength conversion material instead of the pure color laser, and therefore, the colors of the red light and the green light in the at least two colors of light
  • the field is narrow, and only the color gamut range of the DCI 709 (ie, the first color gamut range) can be exhibited, and the blue light emitted by the color wheel 115 is the blue laser light emitted by the light emitting element 114, so there is generally no blue light color.
  • the second light source 112 includes a red laser and a green laser to respectively supplement the light of the red laser and the green laser to widen the color gamut.
  • the color gamut determining module 150 may analyze the grayscale value of each subframe image data of the image data DATA to calculate a color gamut value of the mixed image data of each subframe, thereby determining the color gamut value. Whether it falls in the first color gamut range F1 or the second color gamut range F2.
  • the color gamut judging module 150 may be integrated in an image data processing module of the projection system 100, and the image data processing module receives the image data DATA to decompress the image data DATA, etc., and further based on each The gray scale value of the subframe image data is used to calculate the color gamut value to determine a color gamut range of the image to be displayed.
  • the light source controller 120 is configured to receive the control signal output by the color gamut determining module 150 according to the determination result to control the opening and closing of the (light emitting element) of the first light source 111 and the second light source 112, so that The color gamut range that the light emitted by the first light source 111 and the second light source 112 can modulate satisfies the color gamut range of the image to be displayed.
  • the light processing element 130 may include at least one of an element of a light homogenizing element (such as a light homogenizing rod, a fly-eye lens), a collecting lens, a relay lens, and the like, and the light processing element may be used to the light source device 110.
  • a light homogenizing element such as a light homogenizing rod, a fly-eye lens
  • the emitted first light and the supplemental light are multiplexed and/or changed, and/or the first light and the supplemental light are collected, diffused, shaped, etc. to cause the first light to
  • the supplemental light is illuminated onto the light modulation module according to a preset spot size.
  • the light processing component 130 includes a light homogenizing component (such as a fly-eye lens) for using the first light emitted by the light source device 110 and the complementary light (ie, the The combined light emitted by the first light combining element performs leveling and supplies the uniformized light and the complementary light to the light modulation module 140.
  • a light homogenizing component such as a fly-eye lens
  • the light modulation module 140 is configured to respectively perform image modulation on the first light and the supplementary light according to the image data DATA to generate projection light required for projecting an image.
  • the light modulation module 140 can include at least one of a DMD spatial light modulator, an LCOS spatial light modulator, and an LCD spatial light modulator.
  • the projection lens 170 is configured to receive the projection light to project an image.
  • the light modulation module 140 also produces non-projected light that is not used to project an image.
  • the light recovery module 160 is configured to recycle the non-projected light to the light modulation module 140 for reuse. Specifically, the light recovery module 160 may recover the non-projected light to the device via the light source device 110. The light modulation module 140 is utilized again.
  • the light recovery module 160 may include a light splitting module 161 and an optical path module 162, and the light splitting module 161 is configured to receive the projected light and the non-projected light emitted by the light modulation module 140, and Projecting light is directed to the projection lens 170 and the non-projected light is directed to the light source device 110 via the optical path module 162 such that the light source device 110 directs the non-projected light to the light modulation module 140 Use again.
  • the spectroscopic module 161 may transmit the projection light emitted by the light modulation module 140 to the projection lens 170, and reflect the non-projected light emitted by the light modulation module 140 to the optical path module 162.
  • the optical path module 162 guides the non-projected light to the first light combining element 113, and the first light combining element 113 guides the first light and the supplementary light to the light modulation module 140
  • non-projected light recovered by the light recycling module 160 is also directed to the light modulation module 140 such that the light modulation module 140 can reuse the recovered non-projected light.
  • the first light combining element 113 includes a first area 113a and a second area 113b, and one of the first area 113a and the second area 113b is a light transmitting region, the other one of the first region 113a and the second region 113b is a light reflecting region, the first region 113a guiding the supplemental light and the non-projected light (such as reflection or Transmitted to the light modulation module 140, the second region 113b directs (eg, transmits or reflects) the first light to the light modulation module 140.
  • the first region 113a guiding the supplemental light and the non-projected light (such as reflection or Transmitted to the light modulation module 140
  • the second region 113b directs (eg, transmits or reflects) the first light to the light modulation module 140.
  • the first area 113a is a reflective area
  • the second area 113b is a transmissive area
  • the first area 113a may be a rectangular area and located at the first light combining element 113.
  • the second area 113b may be disposed around the periphery of the first area 113a and be a rectangular annular area.
  • the first region 113a receives the supplemental light emitted by the second light source 112 and the non-projected light recovered by the optical path module 162 and reflects the supplemental light and the non-projected light to the optical processing component 130 such that The light processing component 130 directs the processed supplemental and non-projected light to the light modulation module 140.
  • the second region 113b receives the first light and transmits the first light to the light processing element 130, and the light processing element 130 directs the processed first light to the light modulation Module 140.
  • the optical path module 162 may include a guiding element 163 (such as a reflective element) and a second light combining element 164, and the guiding element 163 is configured to receive the non-projected light emitted by the beam splitting module 161 and The non-projected light is guided (eg, reflected) to the second light combining element 164, and the supplemental light emitted by the second light source 112 is also guided to the second light combining element 164, the second combination
  • the light element 164 combines the non-projected light with the supplemental light and directs it to the first light combining element 113.
  • the second light combining element 164 may transmit the supplemental light to the first light combining element 113 and reflect the non-projected light to the first light combining element 113.
  • the guiding element 163 can also be omitted, or the second combining element 164 is in a position interchangeable with the guiding element 163, the second light combining element 164 receives the non-projected light and the supplemental light emitted by the beam splitting module 161 and the non-projected light and the complementary light are both Guided to the guiding element 163 to be guided (eg, reflected) to the first light combining element 113 by the guiding element 163.
  • the second light combining element 164 is a polarization combining light element, and the second light combining element 164 is configured to transmit one of light having a first polarization state and light having a second polarization state and The light having the first polarization state is reflected by the other of the light having the second polarization state.
  • the light of the first polarization state may refer to S-polarized light
  • the light of the second polarization state corresponds to P-polarized light, of course, vice versa.
  • the second light combining element 164 guides (eg, transmits) the complementary light having the first polarization state emitted by the second light source 112 to the first light combining element 113, the second combination Light element 164 directs (eg, reflects) the non-projected light having a second polarization state to first light combining element 113.
  • the second light source 112 can emit supplemental light having a first polarization state, or the second light source 112 includes a laser and a polarizing element, and light emitted by the laser is converted to have a first polarization via the polarizing element.
  • the supplemental light of the state such that the second light combining element 164 directs complementary light having a first polarization state to the first light combining element 113.
  • the non-projected light is preferably light having a second polarization state, that is, the non-projected light emitted by the light splitting module 161 or the light modulation module 140 is the light having the second polarization state.
  • a polarization element such as a polarization converter
  • the light modulation module 140 is preferably an LCOS spatial light modulator or an LCD spatial light modulator to effectively utilize and recover the polarization state. The purpose of light.
  • a collecting element (such as a collecting lens or the like) may be disposed between the second light combining element 164 and the first light combining element 113, thereby emitting the second light combining element 164.
  • Light is collected and projected onto the first region 113a of the first light combining element 113 such that the first region 113a directs the supplemental light, that is, the recovered non-projected light, to the light processing element 130 to Leading to the light modulation module 140, and the light modulation module 140 may modulate the supplemental light in addition to modulating the first light according to image data in the second color gamut range F2, and modulating the recycling
  • the non-projected light reduces the light loss of the system and improves the light utilization of the system.
  • the light modulation module 140 modulates the supplemental light to generate projection light.
  • the color gamut of the projected image is effectively widened, thereby improving the color distortion phenomenon of the picture, and thus the color gamut of the projection system 100 is wider, the picture color is realistic, and the display effect is better.
  • the projection system 100 further has a light recovery module 160 that can recycle the non-projected light to the light modulation module 140 for reuse, which can improve the light utilization efficiency of the projection system 100.
  • the first light combining element 113 may be modified as follows: the first region 113a may reflect light of a first polarization state and transmit the first The light of the two polarization states, and the natural light can be transmitted; the second region 113b transmits all the light.
  • a polarizing element (such as a polarization converter) may be disposed between the second light combining element 164 and the first light combining element 113, and the polarizing element may transmit light of a first polarization state and the first The light of the second polarization state is converted into the light of the first polarization state, such that the complementary light and the recovered non-projected light reach the light of the first polarization state when the first light combining element 113 reaches the light, so that the first A region 113a further reflects the supplemental light and the non-projected light to the light processing element 130, thereby achieving the effect of the light modulation module 140 utilizing the non-projected light again.
  • a polarizing element such as a polarization converter
  • the light having the first polarization state of the first light irradiated to the first region 113a is lost, and the light having the second polarization state in the first light can be transmitted to the The light processing element 130 is described.
  • FIG. 5 is a schematic structural diagram of a projection system 200 according to a second embodiment of the present invention.
  • the projection system 200 of the second embodiment is substantially the same as the projection system 100 of the first embodiment, that is, the above description of the projection system 100 of the first embodiment is basically applicable to the second embodiment.
  • the main difference between the two is that the positions of the optical path module 262, the first light combining element 213, and the second light source 212 of the light recovery module 260 are different from those in the first embodiment.
  • the optical path module 262 includes two guiding elements (such as reflective elements), the first combining light element 213 is a polarization combining light element, and the first light combining element 213 transmits Light of a first polarization state and reflecting light of a second polarization state.
  • the first light emitted by the first light source 211 and the supplementary light emitted by the second light source 212 are both light having a first polarization state or the first light and the supplementary light are both provided by providing a polarizing element such as a polarization converter.
  • the first light combining element 213 directs (transmits) the first light and the supplemental light to the light processing element 230, and further to the light modulation module 240.
  • the light modulation module 240 may be an LCD or LCOS spatial light modulator, and the non-projected light that is emitted is light having a second polarization state, and the non-projected light having the second polarization state is guided to the light splitting module 261 to The optical path module 262 guides (reflects) the non-projected light having the second polarization state to the first light combining element 213, and the first light combining element 213 Light of the two polarization states is reflected to the light processing element 230, and then reaches the light modulation module 240 for reuse.
  • the second light source 212 and the light emitting element 214 of the first light source 211 may be disposed on the same side of the color wheel 215, that is, the second The supplemental light emitted by the light source 212 reaches the first light combining element 213 via the color wheel 215.
  • a polarizing element such as a polarization converter
  • the non-projected light having the first polarization state is converted into light having the second polarization state and redirected to the first light combining element 214.
  • the second light source 212 may emit supplemental light having a first polarization state, or the second light source 212 may include a laser and a polarizing element, and the light emitted by the laser passes through the polarization The component is converted to supplemental light having a first polarization state such that the first light combining component 213 directs the supplemental light having the first polarization state to the optical processing component 230, thereby reaching the light modulation module 240.
  • FIG. 6 is a schematic structural diagram of a projection system 300 according to a third embodiment of the present invention.
  • the projection system 300 is mostly similar in principle and structure to the projection system 100 of the first embodiment, that is, a partial description of the projection system 100 for the first embodiment is fully applicable to the projection system 300, both The main differences are: the position of the first light source 311, the second light source 312, the optical path control elements of the light source device 310 (such as the position and principle of the light splitting element and the light combining element, etc.), and the number of spatial light modulators of the light modulation module 340.
  • the principle and the splitting module 361 of the light recovery module 360 are different from the optical path module 362.
  • the first light emitted by the first light source 311 may include first color light and second color light, and the first color light may be blue light, and the second color light may be Yellow light, the first color light and the second color light may be sequentially provided.
  • the first light source 311 includes a light-emitting element 314 and a color wheel 315.
  • the structures of the light-emitting element 314 and the color wheel 315 are substantially the same as those of the light-emitting element 314 and the color wheel 315 in the first embodiment. The difference is mainly as follows: as shown in FIG.
  • the color wheel 315 includes two segment regions, and the two segment regions are a first segment region B and a second segment region Y, respectively.
  • the first segment region B is similar to that in the first embodiment, and is used to scatter blue excitation light emitted by the light-emitting element 314 to emit blue light
  • the second segment region Y may be provided with a yellow fluorescent material.
  • the second segment region Y receives the blue excitation light emitted by the light emitting element 314 to generate yellow converted light, and therefore, the first light emitted by the color wheel 315 includes blue light and yellow converted light, and may It is understood that, as described in the first embodiment, the color wheel 315 is moved in the circumferential direction such that the first and second segment regions are sequentially located on the optical path where the blue excitation light emitted by the light-emitting element 314 is located. Thereby, the blue light and the yellow converted light are sequentially emitted as the first light.
  • the light source device 310 further includes light processing elements 316 and 317, a light splitting element 313, and a light combining element 318, and the color wheel 315 emits the first light to the light splitting element via the light processing elements 316 and 317. 313.
  • the light processing elements 316 and 317 are used for the first light to perform processing such as homogenizing and collecting, which may include a uniformizing element 316 (such as a fly-eye lens) and a collecting lens 317, which can be understood. If the light emitted by the color wheel 315 does not need to be processed, the light processing elements 316 and 317 may also be omitted.
  • the light modulation module 340 includes a first spatial light modulator 341 and a second spatial light modulator 342, and the first spatial light modulator 341 and the second spatial light modulator 342 may both be LCOS spatial light modulators. Or LCD spatial light modulator.
  • the light splitting element 313 may be a color splitter, and the light splitting element 313 receives the first light for a first period of time and directs a first color light (such as blue light) used in the first light (eg, Reflecting) to a guiding element 319b (such as a reflective element), wherein the guiding element 319b directs the first color light to the first spatial light modulator 341 such that the first spatial light modulator 341 is in accordance with the first
  • the image data of the color modulates the first color light to produce the projected light and the non-projected light of the first color.
  • the beam splitting element 313 is further configured to convert the first light into the converted light in a second time period different from the first time period (eg, the second time period may be adjacent to the first time period but does not overlap) a second color light (such as red light) is directed to any one of the first spatial light modulator 341 and the second spatial light modulator 342 such that the any one of the spatial light modulators is imaged according to the second color
  • the data modulates the second color light to produce a projected light of a second color and non-projected light.
  • the beam splitting element 313 directs (eg, reflects) the second color light (eg, red light) of the converted light of the first light to the guiding element 319b (eg, a reflective element), and the guiding Element 319b directs the second color light to the first spatial light modulator 341 to cause the first spatial light modulator 341 to modulate the second color light according to image data of the second color to produce a second color Projected light and non-projected light.
  • the guiding element 319b eg, a reflective element
  • the spectroscopic element 313 further turns the first light
  • the third color light (eg, green light) in the converted light is directed (eg, transmitted) to the light combining element 318, and the light combining element 318 adds complementary light of the third color emitted by the second light source 312 (eg, Green supplemental light) also directs (eg, transmits) to the second spatial light modulator 342 and directs (eg, reflects) third color light of the first light emitted by the beam splitting element 313 to the second spatial light modulation
  • the 342 is configured to cause the second spatial light modulator 342 to modulate the third color light according to the image data of the third color to generate the projected light and the non-projected light of the third color.
  • the second spatial light modulator 342 can modulate the third color light according to the third color image data to generate the third color of the projected light and the non-projected light, and as described in the first embodiment,
  • the color gamut determining module 350 determines the subframe image of the third color. The judgment result of the gamut range of the data is determined, and the specific principle will not be described here.
  • the beam splitting module 361 is a polarization beam splitting module (such as a polarization beam splitter), and the beam splitting module 361 uses the light having the first polarization state (such as S-polarized light) emitted by the light modulation module 340 as The projection light is supplied to the projection lens 370, and the light splitting module 361 further supplies the light having the second polarization state (such as P-polarized light) emitted by the light modulation module 340 as the non-projected light to the Optical path module 262.
  • the optical path module 362 directs the non-projected light to the beam splitting element 313, and the splitting element 313 receives the unprojected light and the first light.
  • the light splitting module 361 includes four sides connected end to end, and the first spatial light modulator 341 and the second spatial light modulator 342 are respectively disposed on adjacent sides of the light splitting module 361.
  • the opposite side of the second spatial light modulator 342 emits the projected light
  • the opposite side of the first spatial light modulator 341 emits the unprojected light.
  • the non-projected light emitted by the light splitting module 361 has a second polarization state, or the optical path module 362 includes a polarizing element, and the non-projected light emitted by the light splitting module 361 (such as non-projected light of a first polarization state)
  • the light converted to the second polarization state by the polarizing element is guided by the optical path module 362 to the light source device 310 for reuse.
  • the non-projected light emitted by the spectroscopic module 361 (such as the non-projected light of the first polarization state) is non-projected light of the second polarization state emitted by the beam splitting module 361
  • the light path module 362 is guided to the light splitting element 313 of the light source device 310 to perform splitting and utilization again.
  • the optical path module 362 includes a plurality of guiding elements 363 (such as reflective elements) that guide the non-projected light to the light processing element 316 of the light source device 310.
  • a light processing element 319c (such as a light-shaping element: a fly-eye lens) may be disposed between the second light source 312 and the light combining element 318.
  • the light combining component 318 may include a first area and a second area, wherein one of the first area and the second area is a light transmitting area, the first One of the region and the second region is a light reflecting region, the first region directing (eg, transmitting) the supplemental light of the third color (eg, green supplemental light) to the second spatial light modulation The second region directs (eg, reflects) the first light of the third color to the second spatial light modulator 342.
  • the light combining component 318 is a polarization combining component, and the light combining component 318 is configured to transmit one of light having a first polarization state and light having a second polarization state. The light having the first polarization state and the other of the light having the second polarization state are reflected. Further, in this embodiment, the light combining component 318 transmits a third color light having a first polarization state and reflects a third color light having a second polarization state, and the second light source 312 emits a third color.
  • the complementary light of the third color having the first polarization state is guided (eg, transmitted) by the light combining element 318 to the second spatial light modulator 342, and the light splitting element 313 emits The third color light of the second polarization state is directed (e.g., reflected) by the light combining element 318 to the second spatial light modulator 342.
  • the second light source 312 may include a laser and a polarizing element, and light emitted by the laser is converted into complementary light of a third color having a first polarization state via the polarizing element and is guided to The light combining element 318.
  • the light modulation module 340 of the present embodiment includes two spatial light modulators, and the spatial light modulators of the light splitting elements 313 can make the two spatial light modulators modulate the first color light first, and then At the same time, the second and third color lights are modulated to effectively improve the image modulation speed.
  • the optical paths of the second color light and the third color light may be interchanged, that is, the light splitting element 313 is further used to be different from the first a second time period of a period of time (eg, the second period of time may be adjacent to the first period of time but not overlapping) directing a third color of the converted light of the first light (eg, green light) to the a spatial light modulator 341 and any one of the second spatial light modulators 342 to cause the arbitrary one of the spatial light modulators to modulate the third color light to generate a projection of the third color according to image data of the third color Light and non-projected light.
  • the light splitting element 313 is further used to be different from the first a second time period of a period of time (eg, the second period of time may be adjacent to the first period of time but not overlapping) directing a third color of the converted light of the first light (eg, green light) to the a spatial light modulator 341 and any one of the second spatial light modulators 342 to cause
  • the light splitting element 313 guides (eg, reflects) the third color light (such as green light) of the converted light of the first light to the guiding element 319b (such as a reflective element), and then the guiding Element 319b directs the second color light to the first spatial light modulator 341 to cause the first spatial light modulator 341 to modulate the third color light according to image data of a third color to produce a third color Projected light and non-projected light.
  • the third color light such as green light
  • the guiding element 319b such as a reflective element
  • the spectroscopic element 313 also guides the third color light to the first spatial light modulator 341 in the second period of time, the spectroscopic element 313 further turns the first light
  • the second color light (eg, red light) in the converted light is directed (eg, transmitted) to the light combining element 318, and the light combining element 318 adds complementary light of the second color emitted by the second light source 312 (eg, The red complementary light is also guided (eg, transmitted) to the second spatial light modulator 342, and the second color light having the second polarization state emitted by the light splitting element 313 is guided by the light combining element 318 (eg, reflected)
  • the second spatial light modulator 342 modulates the second color light according to the image data of the second color to generate the projected light and the non-projected light of the second color. It can be understood that the second spatial light modulator 342 can modulate the second color light according to the second color image data to generate the projected light and the non-
  • the light combining component 318 may include a first area and a second area, and one of the first area and the second area
  • the region is a light transmissive region, and one of the first region and the second region is a light reflecting region, and the first region directs (eg, transmits) the complementary light of the second color to the second A spatial light modulator 342 that directs (e.g., reflects) the first light of the second color to the second spatial light modulator 342.
  • the light combining component 318 is a polarization combining component, and the light combining component 318 is configured to use a second color light having a first polarization state and a second color light having a second polarization state.
  • One of the transmissions reflects and reflects the other of the second color light having the first polarization state and the second color light having the second polarization state.
  • the light combining element 318 may transmit a second color light having a first polarization state and a second color light having a second polarization state, and the second light source 312 emits complementary light having a second color.
  • the complementary light of the second color having the first polarization state is guided (eg, transmitted) by the light combining element to the second spatial light modulator 342, and the second polarization state is emitted by the light splitting element 313
  • the second color light is directed (e.g., reflected) by the light combining element 318 to the second spatial light modulator 342.
  • the second light source 312 can include a laser and a polarizing element, and light emitted by the laser is converted into complementary light of a second color having a first polarization state via the polarizing element and is guided to The light combining element 318.
  • FIG. 8 is a schematic structural diagram of a projection system 400 according to a fourth embodiment of the present invention.
  • the projection system 400 is similar in structure to the projection system 300 of the third embodiment, that is, the description of the projection system 300 for the third embodiment is substantially applicable to the projection system 400, the main of the two The difference is that the position of the light processing elements 416 and 417 in the light source device in the projection system 400 and the optical path of the non-projected light recovered by the light recovery module 460 are different from the third embodiment, and the projection system
  • the 400 further includes a polarization beam splitter 481 disposed between the first spatial light modulator 441 and the beam splitting module 461 (such as a polarization beam splitter) and light processing disposed between the light combining element 418 and the second spatial light modulator 442.
  • Element 419a (such as a collection lens).
  • the light splitting element 413 is a dichroic color patch, and in the first time period, the light splitting element 413 reflects the first color light in the first light (blue excitation) Light), a guiding element 419b (such as a reflective element) directs the first color light to the first spatial light modulator 441 (LCOS or LCD spatial light modulator).
  • the first spatial light modulator 441 receives the first color light guided by the guiding element 419b after receiving the image data, and emits the non-projected light of the first color having the first polarization state not used for the projection display and is used for projection display.
  • Projection light of a first color having a second polarization state, the non-projected light of the first color having the first polarization state and the projection light of the first color having the second polarization state used for projection display are Leading to the polarization beam splitter 481, the polarization beam splitter 481 directs (eg, reflects) the non-projected light of the first color having the first polarization state out of the beam splitting module 461 and guides (eg, transmits) the second polarization Projecting light of the first color of the state to the spectroscopic module 461.
  • the beam splitting module 461 guides the projection light of the first color having the second polarization state to the projection lens 470.
  • the second light source 412 may emit supplemental light of the second color light (such as red supplemental light), and the supplemental light of the second color passes through the light processing component 419c (eg The light-collecting element: the compound eye lens) is homogenized, and then transmitted through the light combining element 418, and the light processing element 419a is collected to reach the second spatial light modulator 442, the second spatial light modulator 442 can Complementing the complementary light of the second color according to image data of the second color of the second color gamut range F2, the second spatial light modulator 442 emitting a second color light having a first polarization state for projecting display and The second color light having the second polarization state is not used for projection display to the spectroscopic module 461.
  • the light processing component 419c eg The light-collecting element: the compound eye lens
  • the beam splitting module 461 guides the second color light having the first polarization state to the projection lens 470, and directs the second color light having the second polarization state to the optical path module 462,
  • the light path module 462 can include a plurality of guiding elements 463, 464, 465 (eg, reflective elements) that direct the second color light having the second polarization state to the light source device .
  • the plurality of guiding elements 463, 464, 465 guide the non-projected light of the second color having the second polarization state to the light combining element 418 (the first In the third embodiment, the non-projected light is guided to the light splitting element 313), so that the light combining element 418 combines the unprojected light and the complementary light and supplies it to the second spatial light modulator 442 for reuse.
  • the first light source 441 emits yellow converted light in the first light, and the yellow converted light is split by the beam splitting element 413 (such as a dichroic color patch), in the first light a second color light (eg, red light) is directed (eg, transmitted) by the beam splitting element 413 to the light combining element 418, the light combining element 418 further directing a second color light of the first light (eg, Reflecting) to the second spatial light modulator 442 to cause the second spatial light modulator 442 to modulate the second color light of the first light according to image data of the second color to generate a projection light of the second color And non-projected light, wherein the projection light of the second color can be guided by the spectroscopic module 461 to the projection lens 470 for projection display.
  • the beam splitting element 413 such as a dichroic color patch
  • a third color light (such as green light) in the first light is guided (reflected) by the spectroscopic element 413 to the guiding element 419b, and then reaches the first through the guiding element 419b
  • the spatial light modulator 441 is configured to enable the first spatial light modulator 441 to modulate the third color light in the first light according to the image data of the third color to generate the projected light and the non-projected light of the third color, where The projection light of the third color may be guided by the spectroscopic module 461 to the projection lens 470 for projection display.
  • the light combining element 418 has multiple guiding manners for the second color light in the first light and the second color light in the supplementary light. The following mainly describes in detail two embodiments.
  • the light combining element 418 may include a first area and a second area, the first area reflects a second color light in the first light, and the second area transmits the first a complementary light of two colors, and the light combining element 418 is periodically rotated such that the first region is located on the optical path of the complementary light of the second color emitted by the second light source 412 during the first time period.
  • the second area is located on the optical path of the second color light of the first light emitted by the first light source via the light splitting element 413 during the second time period, so that the light combining element 418 can be
  • the second color light in the first light and the second color light in the supplementary light are sequentially sequentially provided to the second spatial light modulator 442 such that the second spatial light modulator 442 is time-divided (ie, sequential And modulating the second color light in the first light and the second color light in the supplementary light according to the image data.
  • the light combining element 418 is a polarization combining light element, and a polarization state of the second color light in the first light and the second color light in the supplementary light is orthogonal, as in the
  • the second color light in the first light is light having a first polarization state or the second color light in the first light is transmitted via a polarizing element (such as the light splitting element 413 and the light combining element 418) a polarization conversion element) is converted into a second color light having a first polarization state, the second color light having a first polarization state being guided (eg, reflected) by the light combining element 418 to the second spatial light modulator 442;
  • the second color light in the supplemental light is light having a second polarization state, that is, the second light source 412 directly emits a second color light having a second polarization state or the second light source 412 includes a laser and a polarizing element, the second color light emitted by the laser is converted into a second color
  • the second spatial light modulator 442 modulates the second color light having the first polarization state and the complementary light of the second color having the second polarization state according to the image data, and correspondingly emits the image for display Projection light of a second color of one polarization state and non-projection light of a second color of a second polarization state not used for projection display to the spectroscopic module 461.
  • the beam splitting module 461 guides the second color light having the first polarization state to the projection lens 470, and directs the second color light having the second polarization state to the optical path module 462,
  • the light path module 462 can include a plurality of guiding elements 463, 464, 465 (eg, reflective elements) that direct the second color light having the second polarization state to the light source device
  • the light splitting element 413 or the light combining element 418 (this embodiment takes the light combining element 418 as an example).
  • the light combining element 418 may sequentially provide the second color light in the first light and the second color light in the supplementary light to the second spatial light modulator 442 in time, such that the second The spatial light modulator 442 modulates the second color light of the first light and the second color light of the supplementary light according to image data in a time-sharing manner (ie, sequentially); however, in a modified embodiment, the combined light Element 418 may also simultaneously provide a second color light in the first light and a second color light in the supplemental light to the second spatial light modulator 442, such that the second spatial light modulator 442 simultaneously modulates the second color light in the first light and the second color light in the supplementary light according to the image data.
  • one or more guiding elements 463, 464, 465 (such as a reflecting element: a mirror) in the optical path module 462 mainly guides the non-projected light by reflection.
  • the non-projected light includes non-projected light formed based on a corresponding color light of the first light and non-projected light formed based on a corresponding color light of the supplemental light, the non-projected light formed by the first light being formed at a predetermined position
  • the size of the main spot is generally much larger than the size of the main spot formed by the non-projected light formed by the supplemental light at the predetermined position, and the guiding elements 463, 464, 465 may be placed at the predetermined position and the guiding
  • the size of the actual reflecting surface of the element at the predetermined position is smaller than the size of the main spot formed by the first light-formed non-projected light at a predetermined position and substantially just equal to the guiding element 463, 464, 465 at the predetermined
  • the size of the reflecting surface of the position can thereby reduce the recycling of the corresponding color light in the first light, and mainly recycle the effective complementary light.
  • the optical path module 462 when the corresponding color light and the supplemental light in the first light are provided to the second spatial light modulator 442, when the splitting module 461 When the non-projected light formed by the first light is emitted, the optical path module 462 may be turned off, that is, the light recycling module 460 suspends the recovery of the non-projected light; when the spectroscopic module emits the non-projection formed by the supplementary light In the case of light, the optical path module 462 is turned on, and the light recovery module 260 recovers non-projected light formed based on the supplemental light.
  • the non-projected light A of the second color in the first light and the non-projected light C in the supplementary light of the second color are emitted from the spectroscopic module 461, and the second color of the first light
  • the area of the beam of the non-projected light A is larger than the area of the beam of the non-projected light C of the complementary light of the second color.
  • the size of the guiding element 463 is only suitable for the non-projected light C in the supplemental light that completely receives the second color.
  • the optical paths of the second color light and the third color light may be interchanged, and further, in the first time period, the first The two light sources 412 can emit complementary light of the third color light (such as green supplemental light), and the complementary light of the third color is homogenized by the light processing element 419c (such as a light-shaping element: a fly-eye lens), and then The light combining element 418 is transmitted, and the light processing element 419a (such as a collecting lens) is collected to reach the second spatial light modulator 442.
  • the second spatial light modulator 442 may be in accordance with the second color gamut range F2.
  • the three color image data modulates the supplemental light of the third color
  • the second spatial light modulator 442 emits a third color light having a first polarization state for projection display and a second polarization not for projection display
  • the third color of the state is lighted to the spectroscopic module 461.
  • the beam splitting module 461 guides the third color light having the first polarization state to the projection lens 470, and directs the third color light having the second polarization state to the optical path module 462,
  • the light path module 462 can include a plurality of guiding elements 463, 464, 465 (eg, reflective elements) that direct the third color light having the second polarization state to the light source device .
  • the plurality of guiding elements 463, 464, 465 direct the non-projected light of the third color having the second polarization state to the light combining element 418 (the first In the third embodiment, the non-projected light is guided to the light splitting element 313), so that the light combining element 418 combines the unprojected light and the complementary light and supplies it to the second spatial light modulator 442 for reuse.
  • the first light source 411 emits yellow converted light in the first light, and the yellow converted light is split by the beam splitting element 413 (such as a dichroic color patch), in the first light a third color light (eg, green light) is directed (eg, transmitted) by the beam splitting element 413 to the light combining element 418, the light combining element 418 further directing a third color light of the first light (eg, Reflecting) to the second spatial light modulator 442 to cause the second spatial light modulator 442 to modulate the third color light in the first light according to image data of the third color to generate a projection light of a third color And non-projected light, wherein the projection light of the third color can be guided by the spectroscopic module 461 to the projection lens for projection display.
  • the beam splitting element 413 such as a dichroic color patch
  • a second color light (such as red light) in the first light is guided (reflected) by the spectroscopic element to the guiding element 419b, and then reaches the first space through the guiding element 419b
  • the light modulator 441 is configured to enable the first spatial light modulator 441 to modulate the second color light of the first light according to the image data of the second color to generate the projected light and the non-projected light of the second color, wherein the The projection light of the second color may be guided by the polarization beam splitting module to the projection lens 480 for projection display.
  • the light combining element 418 has various guiding manners for the third color light in the first light and the third color light in the supplementary light. The following mainly describes in detail two embodiments.
  • the light combining element 418 may include a first area and a second area, the first area reflects a third color light in the first light, and the second area transmits the first a complementary light of three colors, and the light combining element 418 is periodically rotated such that the first region is located on the optical path of the complementary light of the third color emitted by the second light source 412 during the first time period.
  • the second area is located on the optical path of the third color light of the first light emitted by the first light source via the light splitting element 413 during the second time period, so that the light combining element 418 can be
  • the third color light in the first light and the third color light in the supplementary light are sequentially sequentially supplied to the second spatial light modulator 442 in time, such that the second spatial light modulator 442 is time-divided (ie, sequential And modulating the third color light in the first light and the second color light in the supplementary light according to the image data.
  • the light combining element 418 is a polarization combining light element, and a polarization state of the third color light in the first light and the third color light in the supplementary light is orthogonal, as in the
  • the third color light in the first light is light having a first polarization state or the third color light in the first light is transmitted via a polarization element (such as polarization conversion provided in the light splitting element and the light combining element)
  • the element is converted into a third color light having a first polarization state, and the third color light having the first polarization state is guided (eg, reflected) by the light combining element 418 to the second spatial light modulator 442;
  • the third color light in the supplemental light is light having a second polarization state, that is, the second light source 412 directly emits a third color light having a second polarization state or the second light source 412 includes a laser and a polarization element And the third color light emitted by the laser is converted into the supplemental light by
  • the second spatial light modulator 442 modulates the third color light having the first polarization state and the complementary light of the third color having the second polarization state according to the image data, and correspondingly emits the image for display
  • the projection light of the third color of one polarization state and the non-projection light of the second color of the second polarization state not used for projection display are applied to the spectroscopic module 461.
  • the beam splitting module 461 guides the third color light having the first polarization state to the projection lens 470, and directs the third color light having the second polarization state to the optical path module 462,
  • the light path module can include a plurality of guiding elements 463, 464, 465 (eg, reflective elements) that direct the third color light having the second polarization state to the light source device
  • the light splitting element 413 or the light combining element 418 (this embodiment takes the light combining element 418 as an example).
  • the light combining component 418 may sequentially provide the third color light in the first light and the third color light in the supplementary light to the second spatial light modulator 442 in time, such that the second The spatial light modulator 442 modulates the third color light of the first light and the third color light of the supplementary light according to image data in a time-sharing manner (ie, sequentially); however, in a modified embodiment, the combined light Element 418 may also simultaneously provide a third color light in the first light and a second color light in the supplemental light to the second spatial light modulator 442, such that the second spatial light modulator 442 simultaneously modulates the third color light in the first light and the third color light in the supplementary light according to the image data.
  • the non-projected light A of the third color in the first light and the non-projected light C in the supplementary light of the third color are emitted from the spectroscopic module 461, and the first of the first lights
  • the light beam area of the three-color non-projected light A is larger than the light beam area of the non-projected light C in the complementary light of the third color.
  • the size of the guiding element is only suitable for non-projected light C in the supplemental light that completely receives the second color.
  • FIG. 9 is a schematic structural diagram of a projection system 500 according to a fifth embodiment of the present invention.
  • the projection system 500 is substantially the same as the projection system 400 of the fourth embodiment.
  • the main difference between the two is that the light recycling module of the projection system 500 includes a first recycling module 560 and a second recycling module 580.
  • the first recycling module 560 is the same as the light recycling module 460 in the fourth embodiment.
  • the second light recovery module 580 is disposed adjacent to the first spatial light modulator 541, and the second light recovery module 580 includes a polarization beam splitter 581 and a guiding component 582, and the polarization beam splitter 581 and the fourth embodiment
  • the polarization beam splitter 481 is identical, and the guiding element 582 receives the non-projected light having the second polarization state emitted by the polarization beam splitter 581, and guides the non-projected light having the second polarization state to the light source device (
  • the spectroscopic element 513) is further provided to the first spatial light modulator 541 for further use.
  • the non-projected light emitted by the first spatial light modulator 541 can be further recycled, and the light utilization efficiency of the projection system 500 is higher.

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Abstract

一种投影系统（100），包括光源装置（110）、光调制模块（140）、投影镜头（170）及光回收模块（160）。光源装置（110）包括第一光源（111）及第二光源（112），第一光源（111）用来发出第一光，第一光用来调制第一色域范围内的图像；第二光源（112）用来发出拓宽第一光源（111）发出激发光中的至少一种光的色域的补充光，补充光用来与第一光共同调制第二色域范围内的图像。光调制模块（140）用来依据图像数据对光源装置（110）发出的光进行图像调制以产生非投影光及待显示图像所需的投影光，投影镜头（170）用来接收投影光以投影图像。光回收模块（160）用来将非投影光回收至光调制模块（140）再次利用。该投影系统的色域范围较宽、图像效果较好且光利用率较高。

Description

投影系统 技术领域
本发明涉及投影技术领域，尤其涉及一种投影系统。
 背景技术
现有投影系统被广泛地应用在影院、教育、电视等领域，投影系统按照其采用光调制模块的种类可以分为DMD（Digital Micromirror Device）、LCOS（Liquid Crystal on Silicon）、LCD（Liquid Crystal Display）等，按照光调制模块的数量可分为单片式、双片式和三片式系统。在投影系统的光源方面，传统的光源包括UHP、氙灯等灯泡光源，目前逐渐发展起来的有LED光源、RGB纯激光光源和激光激发荧光粉光源，后者可以认为是以半导体发光器件为基础的光源。受限于光学扩展量，LED光源的投影系统，亮度不足，在许多领域尤其是对亮度要求较高的影院场合应用受限。目前常见的对比区分在于RGB激光光源和激光荧光粉光源，RGB激光光源具有色纯度高、色域广的优势，一般能够达到REC2020色域标准，但其散斑问题是难以解决的疑难问题，激光激发荧光粉的光源不存在散斑问题，视觉表现好，在色域方面一般能够达到DCI标准。针对实际观看图像的绝大多数情况，DCI色域已经足够。可以这样设想，拍摄的图像来自于自然界、生活周边等，我们之所以能够看到物体具有一定的颜色，来自于其反射的光谱，一般反射的光谱都会是较为连续的、具有一定宽度的光谱，因此物体的颜色都会落在DCI色域之内，除非存在这样的情况：拍摄设备直接拍摄了纯激光的光束，例如532nm的绿激光光束和638nm的红激光光束，此时DCI色域无法还原出这两种激光光束的本征颜色，而这也被认为是激光荧光光源不如RGB纯激光光源的地方，因此如何使得激光荧光光源也能够具有超出DCI的色域，同时又能够维持其高光效的特点，成为一个有挑战性的课题。
 技术问题
现有纯激光投影机能够实现REC2020的大色域范围，而激光荧光粉技术的投影机的色域范围是DCI709，虽然自然界中绝大部分颜色均在DCI色域范围内，但是在特定情况下，比如显示纯激光的颜色时，会位于DCI色域之外，现有的激光荧光粉技术的投影机在显示该颜色时，会使超出DCI色域之外的颜色显示不逼真。
随着激光投影技术的发展，逼真度高的投影画面也成为消费者追逐投影产品的一个参考标准。现有的激光荧光粉技术的色域范围满足一般自然界中常规的颜色显示，但对于特殊的图像颜色会在DCI色域之外，如果采用DCI色域来显示，则位于DCI色域之外的颜色只能用DCI色域边界上的颜色来显示，然而不同的颜色差就无法体现出来。最终使得不在DCI色域范围之内的颜色显示失真。
 技术解决方案
为解决现有技术投影系统不能显示特定色域的技术问题，本发明提供一种可以有效拓宽色域的投影系统。
一种投影系统，包括：
光源装置，包括
第一光源，用来发出用来调制图像的第一光，所述第一光用来调制第一色域范围内的图像；及
第二光源，用来发出拓宽所述第一光源发出第一光中的至少一种颜色光的色域的补充光，所述补充光用来与所述第一光共同调制第二色域范围内的图像；
光调制模块，用来依据图像数据对所述光源装置发出的光进行图像调制以产生非投影光及待显示图像所需的投影光；
投影镜头，用来接收所述投影光以投影图像；及
光回收模块，用来将所述非投影光回收至所述光调制模块再次利用。
 有益效果
与现有技术相比较，所述投影系统中，由于所述第二光源能够发出拓宽所述投影系统的色域的补充光，所述光调制模块调制所述补充光产生投影光使得投影图像的色域被有效拓宽，从而改善画面颜色失真现象，因而所述投影系统的色域范围较宽、画面颜色逼真、显示效果较好。此外，所述投影系统还具有光回收模块，所述光回收模块可将所述非投影光回收至所述光调制模块再次利用，可提高所述投影系统的光利用率。
 附图说明
图1是本发明第一实施方式的投影系统的结构示意图。
图2是图1所示投影系统的色轮的结构示意图。
图3是图1所示投影系统的色域范围示意图。
图4是图1所示投影系统的第一合光元件的结构示意图。
图5是本发明第二实施方式的投影系统的结构示意图。
图6是本发明第三实施方式的投影系统的结构示意图。
图7是图6所示投影系统的色轮的结构示意图。
图8是本发明第四实施方式的投影系统的结构示意图。
图9是本发明第五实施方式的投影系统的结构示意图。
主要元件符号说明
投影系统　　　100、200、300、400、500
光源装置　　　110、210、310
光源控制器　　120
光处理元件　　130、230、316、317、319c、419a、419c
光调制模块　　140、240、340
色域判断模块　150、350
光回收模块　　160、260、360
投影镜头　　　170、370、470、570
第一光源　　　111、211、311、411
第二光源　　　112、212、312、412
第一合光元件　113、213
发光元件　　　114、214
色轮　　　　　115、215、315
第一分段区域　B
第二分段区域　R、Y
第三分段区域　G
分光模块　　　161、261、361、461、561
光路模块　　　162、262、362、462、562
第一区域　　　113a
第二区域　　　113b
引导元件　　　163、263、264、363、319b、419b、463、464、465、582
第二合光元件　164
第一色域范围　F1
第二色域范围　F2
分光元件　　　313、413、513
合光元件　　　318、418
偏振分光片　　481、581
如下具体实施方式将结合上述附图进一步说明本发明。
 本发明的最佳实施方式
请参阅图1，图1是本发明第一实施方式的投影系统100的结构示意图。所述投影系统100包括光源装置110、光源控制器120、光处理元件130、光调制模块140、色域判断模块150、光回收模块160、及投影镜头170。
所述光源装置110包括第一光源111、第二光源112及第一合光元件113。所述第一光源111用来发出第一光，所述第一光用来调制图像，且所述第一光能够调制第一色域范围F1内的图像。所述第二光源112用来发出拓宽所述第一光源111发出第一光中的至少一种颜色光的色域的补充光，所述补充光用来与所述第一光共同调制第二色域范围F2内的图像。所述第一合光元件113用来将所述第一光与所述补充光进行合光，使得所述光源装置110发出所述第一光与所述补充光的合光作为所述光源装置110发出的光。
所述第一光源111包括发光元件114与色轮115，所述发光元件114用来发出激发光，所述色轮115位于所述发光元件114发出的激发光所在的光路上，所述色轮115包括至少两个分段区域，所述至少两个分段区域接收所述激发光并对应射出所述第一光，其中所述第一光包括至少两种颜色光，每个分段区域对应发出一种颜色光。
本实施方式中，所述发光元件114为激发光源，其在所述光源控制器120的控制下发出所述激发光。所述发光元件114可以设置于所述色轮115的一侧。进一步地，所述发光元件114可以为蓝色光源，发出蓝色激发光，但是可以理解，所述发光元件114并不限于蓝色光源，其也可以为红色光源、绿色光源、紫外光源等。本实施方式中，所述发光元件114包括蓝色激光器，用来发出蓝色激光作为所述激发光，可以理解，所述发光元件114可以包括一个、两个或多个蓝色激光器，具体其激光器的数量可以依据实际需要选择。
请参阅图2，图2是图1所示色轮115的结构示意图。所述色轮115包括沿圆周方向设置的至少两个分段区域(如R、G、B)，每一分段区域用来射出一种颜色光。所述色轮115可以沿所述色轮115中心旋转，使得所述至少两个分段区域(如R、G、B)周期性的位于所述发光元件114发出的激发光所在的光路上，从而所述至少两个分段区域(如R、G、B)周期性的射出至少两种颜色光以作为所述第一光。可以理解，所述至少两个分段区域(如R、G、B)的面积大小可以依据实际需要设定为相同或不同。
本实施方式中，所述色轮115包括沿圆周方向依次设置的三个分段区域，分别为第一分段区域B、第二分段区域R、及第三分段区域G。所述第一分段区域B用来射出第一颜色光，如蓝色光，当所述发光元件为蓝色光源时，所述第一分段区域B上可以设置有散射材料，所述发光元件114发出的光可以经由所述第一分段区域B散射后射出。在变更实施方式中，当所述发光元件114为紫外光光源时，所述第一分段区域B上可以设置有第一波长转换材料，所述发光元件114发出的光可以激发所述第一波长转换材料而产生所述第一颜色光，如蓝色光。
所述第二分段区域R用来射出第二颜色光，如红色光，所述第二分段区域R上可以设置有第二波长转换材料，如红色荧光粉，所述发光元件114发出的光可以激发所述第二波长转换材料而产生所述第二颜色光，即红色光；所述第三分段区域G用来射出第三颜色光，如绿色光，所述第三分段区域G上可以设置有第三波长转换材料，如绿色荧光粉，所述发光元件114发出的光可以激发所述第三波长转换材料而产生所述第三颜色光，即绿色光。当然，在变更实施方式中，所述色轮115的分段区域的数量也可以为两个（如分别发出蓝色光与黄色光的两个分段区域）、四个（如分别发出蓝、绿、黄、红光的四个分段区域）、五个、六个等，并不限于上述，所述色轮115的分段区域中也可以有两个或以上的分段区域发出同样颜色的光等，即，可以依据实际需要选择色轮115分段区域的数量与发出的转换光的颜色等。
可以理解，在变更实施方式中，所述发光元件114可以直接发出第一光，如所述发光元件114包括至少两种颜色的发光元件，从而所述色轮115可以被省略。本实施方式中，所述色轮115为透射式色轮，即所述色轮115一侧接收所述激发光，另一侧出射所述第一光，所述第一光被引导至所述第一合光元件113，但是，在变更实施方式中，所述色轮115也可以为反射式色轮，即所述色轮115的同一侧即接收所述激发光又出射所述第一光，所述第一光被引导至所述第一合光元件113；又或者，所述色轮115也可以为反射式色轮或者半透射半反射式色轮（如部分分段区域为透射区域，另一部分分段区域为反射区域），所述色轮115为反射式色轮或半透射半反射式色轮时所述发光元件与所述色轮的光路、位置关系也可以依据实际需要设计调整，此处就不再赘述不同类型色轮与所述发光元件的光路、位置关系。
所述第二光源112为补充光源，其在所述光源控制器120的控制下发出补充光。本实施方式中，所述第二光源112设置于所述色轮115的与所述第一光源111相反的一侧，即，所述发光元件114与第二光源112位于所述色轮115的不同侧，所述发光元件114发出的光经由所述色轮115后转换为第一光后被提供到所述第一合光元件113，所述第二光源112发出的补充光被引导至所述第一合光元件113，从而所述第一光与所述补充光在所述第一合光元件113处合光。当然，在变更实施方式中，所述发光元件114与所述第一光源111可以设置于所述色轮115的同一侧，如所述发光元件114发出的激发光与所述第二光源112发出的补充光均被引导至所述色轮115，由所述色轮115发出所述第一光与所述补充光，以作为所述光源装置110发出的光。
具体地，所述第二光源112可以包括至少一激光器，用来发出至少一种颜色的激光作为所述补充光。在一种实施例中，所述第二光源112可以包括第一激光器与第二激光器，分别发出第一补充光与第二补充光，所述第一补充光与所述第二补充光颜色不同。但是，在变更实施方式中，所述第二光源112也可以只包括一种激光器，只发出一种颜色的补充光；或者，所述第二光源112也可以包括三种激光器，发出三种颜色光补充光。可以理解，所述第二光源的激光器的种类或补充光的颜色数量可以依据需要拓宽的色域颜色来确定，如需要拓宽红色色域，所述第二光源112可以包括红色激光器发出红色补充光，如需要拓宽绿色色域，所述第二光源112可以包括绿色激光器发出绿色补充光，如需要拓宽红色色域与绿色色域，所述第二光源可以包括红色激光器发出红色补充光，还包括绿色激光器发出绿色补充光。
本实施方式中，所述发光元件114为蓝色激光器，所述色轮115上设置有荧光材料，用来接收所述发光元件114发出的蓝色激发光（如蓝色而激光）并发出第一光，所述第一光可以包括所述发光元件114发出的所述蓝色激发光或者经散射后的所述蓝色激发光，以及所述荧光材料被所述蓝色激发光激发产生的红色光与绿色光。对应地，所述第二光源112包括发出红色补充光的第一激光器与发出绿色补充光的第二激光器。所述第一激光器与第二激光器的数量也可以为一个、两个或多个，具体可以依据实际需要选择。
所述色域判断模块150用来接收图像数据，并依据所述图像数据（如一子帧图像数据，具体可以为对应一红色图像的一子帧红色图像数据或对应一绿色图像的一子帧绿色图像数据等）判断待显示图像（如一子帧待显示图像，具体可以为一子帧红色的待显示图像或一子帧绿色的待显示图像等）的色域范围，以及依据所述色域范围输出控制信号以通过所述光源控制器120控制所述第一光源与所述第二光源的开启与关闭。
具体地，若所述色域判断模块150判断待显示图像的色域范围落在第一色域范围F1内，所述第一色域范围F1为所述第一光可以展示的色域范围，则所述色域判断模块150输出控制信号至所述光源控制器120控制所述第一光源111开启，所述光调制模块140依据所述图像数据调制所述第一光产生投影光。
若所述色域判断模块150判断待显示图像的色域范围的至少部分在第二色域范围，所述第二色域范围为所述第一色域范围以外的色域范围，且所述第二色域范围在所述补充光与所述第一光共同可以展示的色域范围内，及即所述第二色域范围内的图像数据可以由所述第一光源发出的第一光和所述第二光源发出的第二光共同投影形成，则所述色域判断模块150输出控制信号至所述光源控制器120控制至少所述第二光源112开启（即可以仅控制所述第一光源111开启也可以控制所述第一光源111与所述第二光源112都开启），所述光调制模块140依据所述图像数据调制至少所述补充光（当所述第一光源111与所述第二光源112均开启时，即调制所述第一光与所述补充光）产生所述投影光。
进一步地，请参阅图3，本实施方式中，所述第一色域范围F1可以为所述第一光可以展示的色域范围，其可以是DCI色域范围，如色域范围DCI709，经设置所述第二光源112后，所述第二光源112发出的补充光可以发出超过所述第一色域范围F1的光，具体地，所述第二光源112发出的补充光可以展现REC色域范围F，如色域范围REC2020，所述REC色域范围F可以比所述第一色域范围F1宽，如REC2020的色域范围。定义第二色域范围F2，所述第二色域范围F2为所述第一色域范围F1以外的REC色域范围，且为所述补充光可以展示的色域范围。
具体地，在一种实施方式中，所述第一光可以包括所述发光元件114的蓝色激光激发所述色轮115上的红色、绿色波长转换材料产生的红色荧光与绿色荧光，以及所述色轮115透射、散射或反射的所述发光元件的蓝色激光。由于所述至少两种颜色的光中，所述红色荧光与绿色荧光是激发波长转换材料获得的，而不是纯色的激光，因此，所述至少两种颜色的光中红色光与绿色光的色域较窄，仅能展现DCI709的色域范围（即第一色域范围），而所述色轮115射出的蓝色光为所述发光元件114发出的蓝色激光，因此一般不存在蓝色光色域较窄的问题，因此本实施方式中，所述第二光源112包括红色激光器与绿色激光器分别发出红色激光与绿色激光的补充光来拓宽色域即可。
可以理解，所述色域判断模块150可以分析所述图像数据DATA的各子帧图像数据的灰阶值来计算所述各子帧图像数据混合后的色域值，从而判断所述色域值落在第一色域范围F1还是第二色域范围F2。所述色域判断模块150可以集成在所述投影系统100的图像数据处理模块中，所述图像数据处理模块接收到所述图像数据DATA对所述图像数据DATA进行解压等处理，并进一步基于各子帧图像数据的灰阶值来计算所述色域值以判断所述待显示图像的色域范围。
所述光源控制器120用来接收所述色域判断模块150依据判断结果输出的控制信号来控制所述第一光源111（的发光元件）及所述第二光源112的开启与关闭，以使得第一光源111及第二光源112出射的光能够调制的色域范围满足所述待显示图像的色域范围。
所述光处理元件130可以包括匀光元件（如匀光棒、复眼透镜）、收集透镜、中继透镜等元件中的至少一种元件，所述光处理元件可以用来将所述光源装置110发出的所述第一光与所述补充光进行匀光及/或改变光路，及/或对所述第一光与所述补充光进行收集、扩散、整形等以使所述第一光与所述补充光按照预设光斑大小照射到所述光调制模块上。本实施方式中，所述光处理元件130包括匀光元件（如复眼透镜），所述匀光元件用来将所述光源装置110发出的所述第一光与所述补充光(即所述第一合光元件发出的合光)进行匀光并将匀光后的所述第一光与所述补充光提供至所述光调制模块140。
所述光调制模块140用来依据所述图像数据DATA分别对所述第一光与所述补充光进行图像调制以产生投影图像所需的投影光。所述光调制模块140可以包括DMD空间光调制器、LCOS空间光调制器、LCD空间光调制器中的至少一种。所述投影镜头170用来接收所述投影光以投影图像。
可以理解，所述光调制模块140还产生不用于投影图像的非投影光。所述光回收模块160用来将所述非投影光回收至所述光调制模块140再次利用，具体地，所述光回收模块160可以经由所述光源装置110将所述非投影光回收至所述光调制模块140再次利用。具体地，所述光回收模块160可以包括分光模块161及光路模块162，所述分光模块161用来接收所述光调制模块140发出的所述投影光与所述非投影光，并将所述投影光引导到所述投影镜头170以及将所述非投影光经由所述光路模块162引导至所述光源装置110，使得所述光源装置110将所述非投影光引导至所述光调制模块140再次利用。具体地，所述分光模块161可以将所述光调制模块140发出的投影光透射至所述投影镜头170，以及将所述光调制模块140发出的非投影光反射至所述光路模块162。所述光路模块162将所述非投影光引导至所述第一合光元件113，所述第一合光元件113除了将所述第一光、所述补充光引导至所述光调制模块140外，还将所述光回收模块160回收的非投影光均被引导至所述光调制模块140，以使得所述光调制模块140可以将所述回收的非投影光再次利用。
请参阅图4，在第一种实施例中，所述第一合光元件113包括第一区域113a与第二区域113b，所述第一区域113a与所述第二区域113b其中的一个区域为光透射区域，所述第一区域113a与所述第二区域113b中的另外一个区域为光反射区域，所述第一区域113a将所述补充光与所述非投影光均引导（如反射或透射）至所述光调制模块140，所述第二区域113b将所述第一光引导（如透射或反射）至所述光调制模块140。具体地，如图4所示，所述第一区域113a为反射区域，所述第二区域113b为透射区域，所述第一区域113a可以为矩形区域且位于所述第一合光元件113的中央，所述第二区域113b可以环设于所述第一区域113a外围，为矩形环状区域。所述第一区域113a接收所述第二光源112发出的补充光及所述光路模块162回收的非投影光并将所述补充光与所述非投影光反射至所述光处理元件130，使得所述光处理元件130将处理后的所述补充光与非投影光引导至所述光调制模块140。所述第二区域113b接收所述第一光并将所述第一光透射至所述光处理元件130，进而所述光处理元件130将处理后的所述第一光引导至所述光调制模块140。
本实施方式中，所述光路模块162可以包括引导元件163（如反射元件）与第二合光元件164，所述引导元件163用来接收所述分光模块161发出的所述非投影光并将所述非投影光引导(如反射)至所述第二合光元件164，所述第二光源112发出的所述补充光也被引导至所述第二合光元件164，所述第二合光元件164将所述非投影光与所述补充光合光并引导至所述第一合光元件113。具体地，所述第二合光元件164可以将所述补充光透射至所述第一合光元件113，并将所述非投影光反射至所述第一合光元件113。在变更实施方式中，若所述分光模块161可以直接将所述非投影光引导至所述第二合光元件164，所述引导元件163也可以被省略，或者，所述第二合光元件164与所述引导元件163互换位置，所述第二合光元件164接收所述分光模块161发出的所述非投影光及所述补充光并将所述非投影光与所述补充光均引导至所述引导元件163，以通过所述引导元件163引导（如反射）至所述第一合光元件113。
进一步地，所述第二合光元件164为偏振合光元件，所述第二合光元件164用来将具有第一偏振态的光与具有第二偏振态的光中的一种透射并将具有第一偏振态的光与具有第二偏振态的光中的另外一种反射。可以理解，所述第一偏振态的光可以指S偏振光，所述第二偏振态的光对应的指P偏振光，当然，反之亦可。本实施方式中，所述第二合光元件164将所述第二光源112发出的具有第一偏振态的补充光引导（如透射）至所述第一合光元件113，所述第二合光元件164将具有第二偏振态的所述非投影光引导（如反射）至第一合光元件113。对应地，所述第二光源112可以发出具有第一偏振态的补充光，或者所述第二光源112包括激光器与偏振元件，所述激光器发出的光经由所述偏振元件转换为具有第一偏振态的补充光，从而所述第二合光元件164将具有第一偏振态的补充光引导至所述第一合光元件113。更进一步地，所述非投影光优选为具有第二偏振态的光，即所述分光模块161或者所述光调制模块140发出的所述非投影光即为所述具有第二偏振态的光；然而，当所述分光模块161或者所述光调制模块140发出的所述非投影光为具有第一偏振态的光，则可以在所述光路模块162中增加偏振元件（如偏振转换器），以将所述具有第一偏振态的光转换为具有第二偏振态的光并将所述第二偏振态的光引导至所述第二合光元件164。对应地，当所述第二合光元件164为偏振合光元件时，所述光调制模块140优选为LCOS空间光调制器或LCD空间光调制器，以起到有效利用及回收具有偏振态的光的目的。
此外，本实施方式中，所述第二合光元件164与所述第一合光元件113之间还可以设置聚集元件（如收集透镜等），从而将所述第二合光元件164出射的光聚集并投射至所述第一合光元件113的第一区域113a，以便所述第一区域113a将所述补充光即所述回收的非投影光均引导至所述光处理元件130，以引导至所述光调制模块140，而所述光调制模块140除了依据所述第二色域范围F2内的图像数据调制所述第一光外还可以调制所述补充光，以及调制所述回收的非投影光，减少系统的光损失及提高系统的光利用率。
与现有技术相比较，所述投影系统100中，由于所述第二光源112能够发出拓宽所述投影系统100的色域的补充光，所述光调制模块140调制所述补充光产生投影光使得投影图像的色域被有效拓宽，从而改善画面颜色失真现象，因而所述投影系统100的色域范围较宽、画面颜色逼真、显示效果较好。此外，所述投影系统100还具有光回收模块160，所述光回收模块160可将所述非投影光回收至所述光调制模块140再次利用，可提高所述投影系统100的光利用率。
进一步地，在上述第一实施方式的一种变更实施方式中，所述第一合光元件113还可以有如下变更：所述第一区域113a可以反射第一偏振态的光并透射所述第二偏振态的光，且自然光均可透射；所述第二区域113b则对所有光均透射。同时，所述第二合光元件164与所述第一合光元件113之间可以设置偏振元件（如偏振转换器），且所述偏振元件可以透射第一偏振态的光并将所述第二偏振态的光转换为第一偏振态的光，使得所述补充光与所述回收的非投影光达到所述第一合光元件113时都为第一偏振态的光，从而所述第一区域113a进一步将所述补充光及所述非投影光反射至所述光处理元件130，进而到达所述光调制模块140再次利用所述非投影光的效果。可以理解，本实施方式中，照射到所述第一区域113a的第一光的具有第一偏振态的光被损失掉，所述第一光中具有第二偏振态的光可以被透射至所述光处理元件130。
请参阅图5，图5是本发明第二实施方式的投影系统200的结构示意图。所述第二实施方式的投影系统200与第一实施方式的投影系统100基本相同，也就是说，上述对第一实施方式的投影系统100的描述基本上都适用于所述第二实施方式的投影系统200，二者的主要区别在于：光回收模块260的光路模块262、第一合光元件213及第二光源212的位置均与第一实施方式中有所不同。
具体地，所述第二实施方式中，所述光路模块262包括二引导元件（如反射元件），所述第一合光元件213为偏振合光元件，所述第一合光元件213透射具有第一偏振态的光并且反射具有第二偏振态的光。第一光源211发出的第一光与第二光源212发出的补充光均为具有第一偏振态的光或者通过设置偏振元件（如偏振转换器）将所述第一光及所述补充光均转换成具有第一偏振态的光，所述第一合光元件213将所述第一光及所述补充光引导（透射）至光处理元件230，进而到达光调制模块240。所述光调制模块240可以为LCD或LCOS空间光调制器，其出射的非投影光为具有第二偏振态的光，所述具有第二偏振态的非投影光经所述分光模块261引导至所述光路模块262，所述光路模块262将所述具有第二偏振态的非投影光引导（反射）至所述第一合光元件213，所述第一合光元件213将所述具有第二偏振态的光反射至所述光处理元件230，进而到达所述光调制模块240再次利用。
可以理解，在所述第二实施方式的变更实施方式中，所述第二光源212与所述第一光源211的发光元件214可以设置在所述色轮215的同一侧，即所述第二光源212发出的补充光经由所述色轮215到达所述第一合光元件213。若所述光调制模块240或所述分光模块261出射所述非投影光为具有第一偏振态的光，则可以在所述光路模块262中设置偏振元件（如偏振转换器），将所述具有第一偏振态的非投影光转换为具有第二偏振态的光再引导至所述第一合光元件214。另外，与第一实施方式中类似，所述第二光源212可以发出具有第一偏振态的补充光，或者所述第二光源212包括激光器与偏振元件，所述激光器发出的光经由所述偏振元件转换为具有第一偏振态的补充光，从而所述第一合光元件213将所述具有第一偏振态的补充光引导至所述光处理元件230，进而到达所述光调制模块240。
请参阅图6，图6是本发明第三实施方式的投影系统300的结构示意图。所述投影系统300与第一实施方式的投影系统100原理及结构大部分类似，也就是说，针对所述第一实施方式的投影系统100的部分描述完全适用于所述投影系统300，二者的主要区别在于：第一光源311、第二光源312的位置、光源装置310的光路控制元件（如分光元件及合光元件的位置及原理等）、光调制模块340的空间光调制器的数量及原理以及光回收模块360的分光模块361与光路模块362均有所不同。
具体地，如图6所示，所述第一光源311发出的第一光可以包括第一颜色光与第二颜色光，所述第一颜色光可以为蓝光，所述第二颜色光可以为黄光，所述第一颜色光与所述第二颜色光可以被顺序提供。可以理解，所述第一光源311包括发光元件314及色轮315，所述发光元件314及色轮315的结构与第一实施方式中的发光元件314及色轮315的结构基本相同，二者的区别主要在于：如图7所示，本实施方式中，所述色轮315包括两个分段区域，所述两个分段区域分别为第一分段区域B与第二分段区域Y。所述第一分段区域B与第一实施方式中类似，用来对发光元件314发出的蓝色激发光进行散射而发出蓝色光，所述第二分段区域Y上可以设置有黄色荧光材料，所述第二分段区域Y接收所述发光元件314发出的蓝色激发光产生黄色转换光，因此，所述色轮315射出的所述第一光包括蓝色光与黄色转换光，且可以理解，如第一实施方式中所述，所述色轮315沿圆周方向运动，使得所述第一及第二分段区域顺序位于所述发光元件314发出的蓝色激发光所在的光路上，从而顺序射出所述蓝色光及所述黄色转换光作为所述第一光。
所述光源装置310还包括光处理元件316与317、分光元件313及合光元件318，所述色轮315发出所述第一光经由所述光处理元件316与317被提供至所述分光元件313。可以理解，所述光处理元件316与317用来所述第一光进行匀光及收集等处理，其可以包括顺序设置的匀光元件316（如复眼透镜）与收集透镜317，当然，可以理解，若所述色轮315发出的光无需做处理，所述光处理元件316与317也可以被省略。
所述光调制模块340包括第一空间光调制器341与第二空间光调制器342，所述第一空间光调制器341与所述第二空间光调制器342可以均为LCOS空间光调制器或LCD空间光调制器。所述分光元件313可以为颜色分光片，所述分光元件313在第一时间段接收所述第一光并将用来所述第一光中的第一颜色光（如蓝色光）引导（如反射）至引导元件319b（如反射元件），进而所述引导元件319b将所述第一颜色光引导至所述第一空间光调制器341以使所述第一空间光调制器341依据第一颜色的图像数据调制所述第一颜色光产生第一颜色的投影光与非投影光。
所述分光元件313还用来在不同于所述第一时间段的第二时间段（如第二时间段可以与第一时间段相邻但不交叠）将所述第一光的转换光中的第二颜色光（如红色光）引导至所述第一空间光调制器341与所述第二空间光调制器342中的任意一个以使得所述任意一个空间光调制器依据第二颜色的图像数据调制所述第二颜色光产生第二颜色的投影光与非投影光。本实施方式中，所述分光元件313将所述第一光的转换光中第二颜色光（如红色光）引导（如反射）至所述引导元件319b（如反射元件），进而所述引导元件319b将所述第二颜色光引导至所述第一空间光调制器341以使所述第一空间光调制器341依据第二颜色的图像数据调制所述第二颜色光产生第二颜色的投影光与非投影光。
进一步地，在所述分光元件313还在所述第二时间段将所述第二颜色光引导至所述第一空间光调制器341的同时，所述分光元件313还将所述第一光的转换光中的第三颜色光（如绿色光）引导（如透射）至所述合光元件318，所述合光元件318将所述第二光源312发出的第三颜色的补充光（如绿色补充光）也引导（如透射）至所述第二空间光调制器342以及将所述分光元件313发出的第一光的第三颜色光引导（如反射）至所述第二空间光调制器342，以使所述第二空间光调制器342依据第三颜色的图像数据调制所述第三颜色光产生第三颜色的投影光与非投影光。可以理解，所述第二空间光调制器342可以依据第三颜色图像数据调制所述第三颜色光产生第三颜色的投影光与非投影光，且如第一实施方式中所述，所述第一光源311何时发出第一光中的第三颜色光及所述第二光源312何时发出第三颜色的补充光由所述色域判断模块350判断所述第三颜色的子帧图像数据的色域范围的判断结果决定，此处就不再赘述具体原理。
本实施方式中，所述分光模块361为偏振分光模块（如偏振分束器），所述分光模块361将所述光调制模块340发出的具有第一偏振态（如S偏振光）的光作为所述投影光提供至所述投影镜头370，所述分光模块361还将所述光调制模块340发出的具有第二偏振态（如P偏振光）的光作为所述非投影光提供至所述光路模块262。所述光路模块362将所述非投影光引导至所述分光元件313，所述分光元件313接收所述非投影光与所述第一光。本实施方式中，所述分光模块361包括首尾相连的四侧，所述分光模块361的相邻两侧分别设置所述第一空间光调制器341与所述第二空间光调制器342，所述第二空间光调制器342相对的一侧发出所述投影光，所述第一空间光调制器341相对的一侧发出所述非投影光。
所述分光模块361发出的所述非投影光具有第二偏振态，或者所述光路模块362包括偏振元件，所述分光模块361发出的所述非投影光（如第一偏振态的非投影光）经所述偏振元件转换为具有第二偏振态的光并被所述光路模块362引导至所述光源装置310再次利用。具体地，本实施方式中，所述分光模块361发出的所述非投影光（如第一偏振态的非投影光）经所述分光模块361发出的所述第二偏振态的非投影光被所述光路模块362引导至所述光源装置310的分光元件313再次进行分光及利用。可以理解，本实施方式中，所述光路模块362包括多个引导元件363（如反射元件），所述多个引导元件363将所述非投影光引导至所述光源装置310的光处理元件316与317处，经所述光处理元件316与317后到达所述分光元件313再次被分光与利用。所述第二光源312与所述合光元件318之间可以设置有光处理元件319c（如匀光元件：复眼透镜）。
更进一步地，在一种实施例中，所述合光元件318可以包括第一区域与第二区域，所述第一区域与所述第二区域其中的一个区域为光透射区域，所述第一区域与所述第二区域其中的一个区域为光反射区域，所述第一区域将所述第三颜色的补充光（如绿色补充光）引导（如透射）至所述第二空间光调制器342，所述第二区域将所述第三颜色的第一光引导（如反射）至所述第二空间光调制器342。
在另一种实施例中，所述合光元件318为偏振合光元件，所述合光元件318用来将具有第一偏振态的光与具有第二偏振态的光中的一种透射并将具有第一偏振态的光与具有第二偏振态的光中的另外一种反射。进一步地，本实施例中，所述合光元件318将具有第一偏振态的第三颜色光透射并将具有第二偏振态的第三颜色光反射，所述第二光源312发出具有第三颜色的补充光，所述具有第一偏振态的第三颜色的补充光被所述合光元件318引导（如透射）至所述第二空间光调制器342，所述分光元件313发出的具有第二偏振态的第三颜色光被所述合光元件318引导（如反射）至所述第二空间光调制器342。可以理解，本实施例中，所述第二光源312可以包括激光器与偏振元件，所述激光器发出的光经由所述偏振元件转换为具有第一偏振态的第三颜色的补充光并被引导至所述合光元件318。
相较于第一实施方式，本实施方式的光调制模块340包括两个空间光调制器，通过所述分光元件313的分光处理，使得两个空间光调制器可以先调制第一颜色光，再同时调制第二与第三颜色光，有效提高图像调制速度。
可以理解，在所述第二实施方式的变更实施方式中，所述第二颜色光与所述第三颜色光的光路可以互换，即所述分光元件313还用来在不同于所述第一时间段的第二时间段（如第二时间段可以与第一时间段相邻但不交叠）将所述第一光的转换光中的第三颜色光（如绿色光）引导至所述第一空间光调制器341与所述第二空间光调制器342中的任意一个以使得所述任意一个空间光调制器依据第三颜色的图像数据调制所述第三颜色光产生第三颜色的投影光与非投影光。本实施方式中，所述分光元件313将所述第一光的转换光中第三颜色光（如绿色光）引导（如反射）至所述引导元件319b（如反射元件），进而所述引导元件319b将所述第二颜色光引导至所述第一空间光调制器341以使所述第一空间光调制器341依据第三颜色的图像数据调制所述第三颜色光产生第三颜色的投影光与非投影光。
进一步地，在所述分光元件313还在所述第二时间段将所述第三颜色光引导至所述第一空间光调制器341的同时，所述分光元件313还将所述第一光的转换光中的第二颜色光（如红色光）引导（如透射）至所述合光元件318，所述合光元件318将所述第二光源312发出的第二颜色的补充光（如红色补充光）也引导（如透射）至所述第二空间光调制器342，所述分光元件313发出的具有第二偏振态的第二颜色光被所述合光元件318引导（如反射）至所述第二空间光调制器342，以使所述第二空间光调制器342依据第二颜色的图像数据调制所述第二颜色光产生第二颜色的投影光与非投影光。可以理解，所述第二空间光调制器342可以依据第二颜色图像数据调制所述第二颜色光产生第二颜色的投影光与非投影光。
具体地，所述第二实施方式的变更实施方式的一种实施例中，所述合光元件318可以包括第一区域与第二区域，所述第一区域与所述第二区域其中的一个区域为光透射区域，所述第一区域与所述第二区域其中的一个区域为光反射区域，所述第一区域将所述第二颜色的补充光引导（如透射）至所述第二空间光调制器342，所述第二区域将所述第二颜色的第一光引导（如反射）至所述第二空间光调制器342。
在另一种实施例中，所述合光元件318为偏振合光元件，所述合光元件318用来将具有第一偏振态的第二颜色光与具有第二偏振态的第二颜色光中的一种透射并将具有第一偏振态的第二颜色光与具有第二偏振态的第二颜色光中的另外一种反射。进一步地，所述合光元件318可以将具有第一偏振态的第二颜色光透射并将具有第二偏振态的第二颜色光反射，所述第二光源312发出具有第二颜色的补充光，所述具有第一偏振态的第二颜色的补充光被所述合光元件引导（如透射）至所述第二空间光调制器342，所述分光元件313发出的具有第二偏振态的第二颜色光被所述合光元件318引导（如反射）至所述第二空间光调制器342。可以理解，本实施例中，所述第二光源312可以包括激光器与偏振元件，所述激光器发出的光经由所述偏振元件转换为具有第一偏振态的第二颜色的补充光并被引导至所述合光元件318。
请参阅图8，图8是本发明第四实施方式的投影系统400的结构示意图。所述投影系统400与第三实施方式的投影系统300的结构相似，也就是说，针对所述第三实施方式的投影系统300的描述基本上可以适用于所述投影系统400，二者的主要差别在于：所述投影系统400中的光源装置中的光处理元件416与417的位置及所述光回收模块460回收的非投影光的光路与第三实施方式有所不同，且所述投影系统400还包括设置于第一空间光调制器441与分光模块461(如偏振分束器)之间的偏振分光片481以及设置于合光元件418与第二空间光调制器442之间的光处理元件419a（如收集透镜）。
具体来说，所述第四实施方式的投影系统400中，分光元件413为二向色片，在第一时间段，所述分光元件413反射第一光中的第一颜色光(蓝色激发光)，引导元件419b（如反射元件）将所述第一颜色光引导至所述第一空间光调制器441（LCOS或LCD空间光调制器）。所述第一空间光调制器441接收图像数据调制所述引导元件419b引导的第一颜色光后，发出不用于投影显示的具有第一偏振态的第一颜色的非投影光以及用来投影显示的具有第二偏振态的第一颜色的投影光，所述具有第一偏振态的第一颜色的非投影光与所述用来投影显示的具有第二偏振态的第一颜色的投影光被引导至所述偏振分光片481，所述偏振分光片481引导(如反射)具有第一偏振态的第一颜色的非投影光至所述分光模块461外且引导（如透射）具有第二偏振态的第一颜色的投影光至所述分光模块461。所述分光模块461将所述具有第二偏振态的第一颜色的投影光引导至投影镜头470。
进一步地，在所述第一时间段，所述第二光源412可以发出第二颜色光的补充光（如红色补充光），所述第二颜色的补充光经所述光处理元件419c（如匀光元件：复眼透镜）匀光后，再经所述合光元件418透射、所述光处理元件419a聚集后到达所示第二空间光调制器442，所述第二空间光调制器442可以依据第二色域范围F2的第二颜色的图像数据调制所述第二颜色的补充光，所述第二空间光调制器442发出用来投影显示的具有第一偏振态的第二颜色光及不用于投影显示的具有第二偏振态的第二颜色光至所述分光模块461。所述分光模块461将所述具有第一偏振态的第二颜色光引导至所述投影镜头470，并将所述具有第二偏振态的第二颜色光引导至所述光路模块462，所述光路模块462可以包括多个引导元件463、464、465（如反射元件），所述多个引导元件463、464、465将所述具有第二偏振态的第二颜色光引导至所述光源装置。具体地，与第三实施方式中不同的是，所述多个引导元件463、464、465将所述具有第二偏振态的第二颜色的非投影光引导至所述合光元件418（第三实施方式中，非投影光被引导至分光元件313），从而所述合光元件418将所述非投影光及所述补充光合光后提供到所述第二空间光调制器442再次利用。
在第二时间段，所述第一光源441发出第一光中的黄色转换光，所述黄色转换光经所述分光元件413（如二向色片）分束，所述第一光中的第二颜色光（如红色光）被所述分光元件413引导（如透射）至所述合光元件418，所述合光元件418将所述第一光中的第二颜色光进一步引导（如反射）至所述第二空间光调制器442，以使所述第二空间光调制器442依据第二颜色的图像数据调制所述第一光中的第二颜色光产生第二颜色的投影光与非投影光，其中所述第二颜色的投影光可以被所述分光模块461引导至所述投影镜头470进行投影显示。进一步地，同时，所述第一光中的第三颜色光（如绿色光）被所述分光元件413引导（反射）至所述引导元件419b，进而通过所述引导元件419b到达所述第一空间光调制器441，使得所述第一空间光调制器441可以依据第三颜色的图像数据调制所述第一光中的第三颜色光产生第三颜色的投影光与非投影光，其中所述第三颜色的投影光可以被所述分光模块461引导至所述投影镜头470进行投影显示。
具体地，所述合光元件418对所述第一光中的第二颜色光与所述补充光中的第二颜色光有多种引导方式。以下主要以两种实施例作详细说明。
在一种实施例中，所述合光元件418可以包括第一区域与第二区域，所述第一区域反射所述第一光中的第二颜色光，所述第二区域透射所述第二颜色的补充光，且所述合光元件418周期性旋转，使得所述第一区域在所述第一时间段位于所述第二光源412发出的第二颜色的补充光所在的光路上，且所述第二区域在所述第二时间段位于所述第一光源经由所述分光元件413发出的第一光中的第二颜色光所在的光路上，使得所述合光元件418可以在时间上顺序提供第一光中的第二颜色光及所述补充光中的第二颜色光至所述第二空间光调制器442，使得所述第二空间光调制器442分时(即顺序)依据图像数据调制所述第一光中的第二颜色光及所述补充光中的第二颜色光。
在另一种实施例中，所述合光元件418为偏振合光元件，所述第一光中的第二颜色光及所述补充光中的第二颜色光的偏振态正交，如所述第一光中的第二颜色光为具有第一偏振态的光或者所述第一光中的第二颜色光经由偏振元件（如设置于所述分光元件413与所述合光元件418的偏振转换元件）转换为具有第一偏振态的第二颜色光，所述具有第一偏振态的第二颜色光被所述合光元件418引导(如反射)至所述第二空间光调制器442；所述补充光中的第二颜色光为具有第二偏振态的光，即所述第二光源412直接发出具有第二偏振态的第二颜色光或者所述第二光源412包括激光器与偏振元件，所述激光器发出的第二颜色光经由所述偏振元件转换为具有第二偏振态的第二颜色光作为所述补充光，所述具有第二偏振态的第二颜色的补充光被所述合光元件418引导（如透射）至所述第二空间光调制器442。所述第二空间光调制器442依据图像数据调制所述具有第一偏振态的第二颜色光及所述具有第二偏振态的第二颜色的补充光，对应发出用来投影显示的具有第一偏振态的第二颜色的投影光及不用于投影显示的具有第二偏振态的第二颜色的非投影光至所述分光模块461。所述分光模块461将所述具有第一偏振态的第二颜色光引导至所述投影镜头470，并将所述具有第二偏振态的第二颜色光引导至所述光路模块462，所述光路模块462可以包括多个引导元件463、464、465（如反射元件），所述多个引导元件463、464、465将所述具有第二偏振态的第二颜色光引导至所述光源装置的分光元件413或合光元件418（本实施例以合光元件418为例）。其中，所述合光元件418可以在时间上顺序提供第一光中的第二颜色光及所述补充光中的第二颜色光至所述第二空间光调制器442，使得所述第二空间光调制器442分时(即顺序)依据图像数据调制所述第一光中的第二颜色光及所述补充光中的第二颜色光；但是，在变更实施例中，所述合光元件418也可以在时间上是同时提供第一光中的第二颜色光及所述补充光中的第二颜色光至所述第二空间光调制器442，使得所述第二空间光调制器442同时依据图像数据调制所述第一光中的第二颜色光及所述补充光中的第二颜色光。
更进一步地，由于激光的光学扩展量小，激光较于荧光更容易回收，以及对于激光进行回收可以节省激光的功率，以及荧光与激光的混合光可调制的图像色域相对于纯激光可调制的色域较小，因此，本实施方式中，可以设置成尽量多回收激光而尽量少回收荧光。为达到上述目的，具体地，如图8所示，所述光路模块462中一个或多个引导元件463、464、465（如反射元件：反射镜）主要通过反射引导所述非投影光，所述非投影光包括基于所述第一光的对应颜色光形成的非投影光与基于所述补充光的对应颜色光形成的非投影光，所述第一光形成的非投影光在预定位置形成的主光斑的尺寸一般远大于所述补充光形成的非投影光在所述预定位置形成的主光斑的尺寸，可以将所述引导元件463、464、465设置于所述预定位置且所述引导元件在所述预定位置的实际反射面的尺寸小于所述第一光形成的非投影光在预定位置形成的主光斑的尺寸且基本上刚好等于所述引导元件463、464、465在所述预定位置的反射面的尺寸，由此可以进了减小对所述第一光中的对应颜色光进行的回收利用，而主要针对有效的补充光进行回收利用。
更进一步地，在一种实施例中，当所述第一光中的对应颜色光及所述补充光是分时被提供到所述第二空间光调制器442时，当所述分光模块461发出所述第一光形成的非投影光时，所述光路模块462可以关闭，即所述光回收模块460暂停回收所述非投影光；当所述分光模块发出所述补充光形成的非投影光时，所述光路模块462开启，所述光回收模块260回收基于所述补充光形成的非投影光。
如图8所示：第一光中的第二颜色的非投影光A与第二颜色的补充光中的非投影光C从所述分光模块461中出射，第一光中的第二颜色的非投影光A的光束面积比第二颜色的补充光中的非投影光C的光束面积大。引导元件463的大小仅适用于完全接收第二颜色的补充光中的非投影光C。
进一步地，在所述第四实施方式中的变更实施方式中，所述第二颜色光与所述第三颜色光的光路可以互换，进一步地，在所述第一时间段，所述第二光源412可以发出第三颜色光的补充光（如绿色补充光），所述第三颜色的补充光经所述光处理元件419c（如匀光元件：复眼透镜）匀光后，再经所述合光元件418透射、所述光处理元件419a(如收集透镜)聚集后到达所述第二空间光调制器442，所述第二空间光调制器442可以依据第二色域范围F2的第三颜色的图像数据调制所述第三颜色的补充光，所述第二空间光调制器442发出用来投影显示的具有第一偏振态的第三颜色光及不用于投影显示的具有第二偏振态的第三颜色光至所述分光模块461。所述分光模块461将所述具有第一偏振态的第三颜色光引导至所述投影镜头470，并将所述具有第二偏振态的第三颜色光引导至所述光路模块462，所述光路模块462可以包括多个引导元件463、464、465（如反射元件），所述多个引导元件463、464、465将所述具有第二偏振态的第三颜色光引导至所述光源装置。具体地，与第三实施方式中不同的是，所述多个引导元件463、464、465将所述具有第二偏振态的第三颜色的非投影光引导至所述合光元件418（第三实施方式中，非投影光被引导至分光元件313），从而所述合光元件418将所述非投影光及所述补充光合光后提供到所述第二空间光调制器442再次利用。
在第二时间段，所述第一光源411发出第一光中的黄色转换光，所述黄色转换光经所述分光元件413（如二向色片）分束，所述第一光中的第三颜色光（如绿色光）被所述分光元件413引导（如透射）至所述合光元件418，所述合光元件418将所述第一光中的第三颜色光进一步引导（如反射）至所述第二空间光调制器442，以使所述第二空间光调制器442依据第三颜色的图像数据调制所述第一光中的第三颜色光产生第三颜色的投影光与非投影光，其中所述第三颜色的投影光可以被所述分光模块461引导至所述投影镜头进行投影显示。进一步地，同时，所述第一光中的第二颜色光（如红色光）被所述分光元件引导（反射）至所述引导元件419b，进而通过所述引导元件419b到达所述第一空间光调制器441，使得所述第一空间光调制器441可以依据第二颜色的图像数据调制所述第一光中的第二颜色光产生第二颜色的投影光与非投影光，其中所述第二颜色的投影光可以被所述偏振分光模块引导至所述投影镜头480进行投影显示。
具体地，所述合光元件418对所述第一光中的第三颜色光与所述补充光中的第三颜色光有多种引导方式。以下主要以两种实施例作详细说明。
在一种实施例中，所述合光元件418可以包括第一区域与第二区域，所述第一区域反射所述第一光中的第三颜色光，所述第二区域透射所述第三颜色的补充光，且所述合光元件418周期性旋转，使得所述第一区域在所述第一时间段位于所述第二光源412发出的第三颜色的补充光所在的光路上，且所述第二区域在所述第二时间段位于所述第一光源经由所述分光元件413发出的第一光中的第三颜色光所在的光路上，使得所述合光元件418可以在时间上顺序提供第一光中的第三颜色光及所述补充光中的第三颜色光至所述第二空间光调制器442，使得所述第二空间光调制器442分时(即顺序)依据图像数据调制所述第一光中的第三颜色光及所述补充光中的第二颜色光。
在另一种实施例中，所述合光元件418为偏振合光元件，所述第一光中的第三颜色光及所述补充光中的第三颜色光的偏振态正交，如所述第一光中的第三颜色光为具有第一偏振态的光或者所述第一光中的第三颜色光经由偏振元件（如设置于所述分光元件与所述合光元件的偏振转换元件）转换为具有第一偏振态的第三颜色光，所述具有第一偏振态的第三颜色光被所述合光元件418引导(如反射)至所述第二空间光调制器442；所述补充光中的第三颜色光为具有第二偏振态的光，即所述第二光源412直接发出具有第二偏振态的第三颜色光或者所述第二光源412包括激光器与偏振元件，所述激光器发出的第三颜色光经由所述偏振元件转换为具有第二偏振态的第三颜色光作为所述补充光，所述具有第二偏振态的第三颜色的补充光被所述合光元件418引导（如透射）至所述第二空间光调制器442。所述第二空间光调制器442依据图像数据调制所述具有第一偏振态的第三颜色光及所述具有第二偏振态的第三颜色的补充光，对应发出用来投影显示的具有第一偏振态的第三颜色的投影光及不用于投影显示的具有第二偏振态的第二颜色的非投影光至所述分光模块461。所述分光模块461将所述具有第一偏振态的第三颜色光引导至所述投影镜头470，并将所述具有第二偏振态的第三颜色光引导至所述光路模块462，所述光路模块可以包括多个引导元件463、464、465（如反射元件），所述多个引导元件463、464、465将所述具有第二偏振态的第三颜色光引导至所述光源装置的分光元件413或合光元件418（本实施例以合光元件418为例）。其中，所述合光元件418可以在时间上顺序提供第一光中的第三颜色光及所述补充光中的第三颜色光至所述第二空间光调制器442，使得所述第二空间光调制器442分时(即顺序)依据图像数据调制所述第一光中的第三颜色光及所述补充光中的第三颜色光；但是，在变更实施例中，所述合光元件418也可以在时间上是同时提供第一光中的第三颜色光及所述补充光中的第二颜色光至所述第二空间光调制器442，使得所述第二空间光调制器442同时依据图像数据调制所述第一光中的第三颜色光及所述补充光中的第三颜色光。
进一步地，如图8所示：第一光中的第三颜色的非投影光A与第三颜色的补充光中的非投影光C从所述分光模块461中出射，第一光中的第三颜色的非投影光A的光束面积比第三颜色的补充光中的非投影光C的光束面积大。引导元件的大小仅适用于完全接收第二颜色的补充光中的非投影光C。
请参阅图9，图9是本发明第五实施方式的投影系统500结构示意图。所述投影系统500与第四实施方式的投影系统400基本相同，二者的主要差别在于：所述投影系统500的光回收模块包括第一回收模块560与第二回收模块580。所述第一回收模块560与第四实施方式中的光回收模块460相同。所述第二光回收模块580邻近所述第一空间光调制器541设置，所述第二光回收模块580包括偏振分光片581及引导元件582，所述偏振分光片581与第四实施方式的偏振分光片481相同，所述引导元件582接收所述偏振分光片581发出的具有第二偏振态的非投影光，并将所述具有第二偏振态的非投影光引导至所述光源装置（如所述分光元件513），以进一步提供到所述第一空间光调制器541进一步利用。本实施方式中，所述第一空间光调制器541出射的非投影光也可以进一步被回收利用，所述投影系统500的光利用率更高。
以上所述仅为本发明的实施方式，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等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (23)

1.一种投影系统，其特征在于：所述投影系统包括：
光源装置，包括
第一光源，用来发出第一光，所述第一光用来调制第一色域范围内的图像；及
第二光源，用来发出拓宽所述第一光源发出第一光中的至少一种颜色光的色域的补充光，所述补充光用来与所述第一光共同调制第二色域范围内的图像；
光调制模块，用来依据图像数据对所述光源装置发出的光进行图像调制以产生非投影光及待显示图像所需的投影光；
投影镜头，用来接收所述投影光以投影图像；及
光回收模块，用来将所述非投影光回收至所述光调制模块再次利用。
2.如权利要求1所述的投影系统，其特征在于：所述投影系统还包括：
色域判断模块，用来接收图像数据并依据所述图像数据判断待显示图像的色域范围，以及依据所述色域范围输出控制信号；
光源控制器，用来接收所述控制信号，并根据所述控制信号控制所述第一光源发出的第一光及所述第二光源发出的第二光，以使得第一光源及第二光源出射的光能够调制的色域范围满足所述待显示图像的色域范围。
3.如权利要求2所述的投影系统，其特征在于：所述第一光源包括发光元件与色轮，所述色轮包括至少两个分段区域，所述发光元件发出激发光，所述至少两个分段区域接收所述激发光并对应射出第一光，所述第一光包括至少两种颜色光，所述补充光包括激光；
若所述色域判断模块判断待显示图像的色域范围落在第一色域范围内，所述第一色域范围为所述至少两种颜色的光可以展示的色域范围，所述色域判断模块输出控制信号至所述光源控制器控制所述第一光源开启，所述光调制模块依据所述图像数据调制所述第一光产生投影光；
若所述色域判断模块判断待显示图像的色域范围的至少部分在第二色域范围，所述第二色域范围为所述第一色域范围以外的色域范围，且所述第二色域范围在所述补充光与所述第一光共同可以展示的色域范围内，所述色域判断模块输出控制信号至所述光源控制器控制所述第一光源与所述第二光源开启，所述光调制模块依据所述图像数据调制所述补充光产生所述投影光。
4.如权利要求1所述的投影系统，其特征在于：所述第一色域范围为DCI色域范围，所述第二色域范围为REC色域范围除去DCI色域范围的部分。
5.如权利要求1所述的投影系统，其特征在于：所述光回收模块包括分光模块及光路模块，所述分光模块用来接收所述光调制模块发出的所述投影光与所述非投影光，并将所述投影光引导到所述投影镜头以及将所述非投影光经由所述光路模块引导至所述光源装置，使得所述光源装置将所述非投影光引导至所述光调制模块再次利用。
6.如权利要求5所述的投影系统，其特征在于：所述分光模块为偏振分光模块，所述偏振分光模块将所述光调制模块发出的具有第一偏振态的光作为所述投影光提供至所述投影镜头，所述偏振分光模块还将所述光调制模块发出的具有第二偏振态的光作为所述非投影光提供至所述光路模块。
7.如权利要求5所述的投影系统，其特征在于：所述光源装置还包括第一合光元件，所述第一光源发出的激发光经由所述色轮转换为所述第一光并被引导至所述第一合光元件，所述第二光源发出的补充光也被引导至所述第一合光元件，所述光路模块也将所述非投影光引导至所述第一合光元件，所述第一合光元件发出的所述第一光、所述补充光及所述非投影光被引导至所述光调制模块。
8.如权利要求7所述的投影系统，其特征在于：所述第一合光元件包括第一区域与第二区域，所述第一区域与所述第二区域其中的一个区域为光透射区域，所述第一区域与所述第二区域其中的另一个区域为光反射区域，所述第一区域将所述补充光与所述非投影光引导至所述光调制模块，所述第二区域将所述第一光引导至所述光调制模块。
9.如权利要求7所述的投影系统，其特征在于：所述第一合光元件为偏振合光元件，所述第一合光元件将具有第一偏振态的第一光及具有第一偏振态的补充光均引导至所述光调制模块，所述第一合光元件还将具有第二偏振态的非投影光引导至所述光调制模块，所述光调制模块为LCD空间光调制模块或LCOS空间光调制模块。
10.如权利要求7所述的投影系统，其特征在于：所述光路模块包括引导元件与第二合光元件，所述引导元件用来接收所述分光模块发出的所述非投影光并将所述非投影光引导至所述第二合光元件，所述第二光源发出的所述补充光也被引导至所述第二合光元件，所述第二合光元件将所述非投影光与所述补充光引导至所述第一合光元件。
11.如权利要求10所述的投影系统，其特征在于：所述第二合光元件为偏振合光元件，所述第二合光元件用来将具有第一偏振态的光与具有第二偏振态的光中的一种透射并将具有第一偏振态的光与具有第二偏振态的光中的另外一种反射，所述第二合光元件将所述第二光源发出的具有第一偏振态的补充光引导至所述第一合光元件，所述第二合光元件将具有第二偏振态的所述非投影光引导至第一合光元件。
12.如权利要求5所述的投影系统，其特征在于：所述光调制模块包括第一空间光调制器与第二空间光调制器，所述光源装置还包括分光元件与合光元件，所述分光元件接收所述第一光并将所述第一光中的第一颜色光引导至所述第一空间光调制器，以使所述第一空间光调制器依据图像数据调制所述第一颜色光产生第一颜色的投影光与非投影光，所述分光元件将所述第一光中的第二颜色光引导至所述合光元件，所述第二光源发出第二颜色的补充光被提供至所述合光元件，所述合光元件发出的第二颜色光被引导至所述第二空间光调制器，以使所述第二空间光调制器依据图像数据调制所述第二颜色光产生第二颜色的投影光与非投影光，所述分光元件还用来将所述第一光中的第三颜色光引导至所述第一空间光调制器与所述第二空间光调制器中的任意一个，以使得所述任意一个空间光调制器依据图像数据调制所述第三颜色光产生第三颜色的投影光与非投影光。
13.如权利要求12所述的投影系统，其特征在于：所述分光模块为偏振分光模块，所述偏振分光模块将所述第一空间光调制器与第二空间光调制器发出的具有第一偏振态的光作为所述投影光提供至所述投影镜头，所述偏振分光模块还将所述第一空间光调制器与第二空间光调制器发出的具有第二偏振态的光作为所述非投影光提供至所述光路模块。
14.如权利要求13所述的投影系统，其特征在于：所述偏振分光模块为偏振分束器，所述第一空间光调制器与第二空间光调制器为LCD空间光调制模块或LCOS空间光调制模块。
15.如权利要求13所述的投影系统，其特征在于：所述投影系统还包括偏振分光片，所述偏振分光片设置于所述第一空间光调制器与所述偏振分光模块之间，所述偏振分光片引导具有第一偏振态的第一颜色的非投影光至所述偏振分光模块外且引导具有第二偏振态的第一颜色的投影光至所述偏振分光模块，所述偏振分光模块将所述具有第二偏振态的第一颜色的投影光引导至投影镜头。
16.如权利要求12所述的投影系统，其特征在于：所述光路模块将所述非投影光引导至所述分光元件，所述分光元件接收所述非投影光与所述第一光。
17.如权利要求16所述的投影系统，其特征在于：所述非投影光具有第二偏振态，或者所述光路模块包括偏振元件，所述非投影光经所述偏振元件转换为具有第二偏振态的光并被所述光路模块引导至所述分光元件。
18.如权利要求12所述的投影系统，其特征在于：所述合光元件包括第一区域与第二区域，所述第一区域与所述第二区域其中的一个区域为光透射区域，所述第一区域与所述第二区域其中的一个区域为光反射区域，所述第一区域将所述第二颜色的补充光引导至所述第二空间光调制器，所述第二区域将所述第二颜色的第一光引导至所述第二空间光调制器。
19.如权利要求12所述的投影系统，其特征在于：所述合光元件为偏振合光元件，所述合光元件用来将具有第一偏振态的第二颜色光与具有第二偏振态的第二颜色光中的一种透射并将具有第一偏振态的第二颜色光与具有第二偏振态的第二颜色光中的另外一种反射。
20.如权利要求19所述的投影系统，其特征在于：所述光路模块将所述非投影光引导至所述合光元件，所述合光元件将所述非投影光与所述第二光源发出的补充光引导至所述第二空间光调制器。
21.如权利要求5所述的投影系统，其特征在于：所述光路模块包括引导元件，所述引导元件用来引导所述非投影光，所述非投影光包括基于所述第一光形成的非投影光与基于所述补充光形成的非投影光，所述第一光形成的非投影光在预定位置形成的主光斑的尺寸大于所述补充光形成的非投影光在所述预定位置形成的主光斑的尺寸，所述引导装置设置于所述预定位置且所述引导装置在所述预定位置的反射面的尺寸小于所述第一光形成的非投影光在预定位置形成的主光斑的尺寸。
22.如权利要求21所述的投影系统，其特征在于：所述反射装置在所述预定位置的反射面的尺寸与所述补充光形成的非投影光在所述预定位置形成的主光斑尺寸相等。
23.如权利要求5或22所述的投影系统，其特征在于：当所述分光模块发出所述第一光形成的非投影光时，所述光路模块关闭，所述光回收模块暂停回收所述非投影光；当所述分光模块发出所述补充光形成的非投影光时，所述光路模块开启，所述光回收模块回收基于所述补充光形成的非投影光。
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