WO2018170987A1 - Système de projection - Google Patents

Système de projection 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
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WO
WIPO (PCT)
Prior art keywords
light
color
module
projected
projection system
Prior art date
Application number
PCT/CN2017/081312
Other languages
English (en)
Chinese (zh)
Inventor
郭祖强
胡飞
李屹
Original Assignee
深圳市光峰光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 深圳市光峰光电技术有限公司 filed Critical 深圳市光峰光电技术有限公司
Publication of WO2018170987A1 publication Critical patent/WO2018170987A1/fr

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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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  • Projection Apparatus (AREA)

Abstract

La présente invention a trait à un système de projection (100) qui comprend un appareil à sources lumineuses (110), un module de modulation de lumière (140), un objectif de projection (170) et un module de recyclage de lumière (160). L'appareil à sources lumineuses (110) comprend une première source lumineuse (111) et une seconde source lumineuse (112). La première source lumineuse (111) sert à émettre une première lumière. La première lumière est destinée à moduler une image dans une première plage de gamme de couleurs. La seconde source lumineuse (112) sert à émettre une lumière supplémentaire pour élargir une gamme de couleurs d'au moins un type de lumière dans la lumière d'excitation émise par cette première source lumineuse (111). La lumière supplémentaire est destinée à moduler, conjointement avec la première lumière, une image dans une seconde plage de gamme de couleurs. Le module de modulation de lumière (140) sert à effectuer une modulation d'image sur la lumière émise par l'appareil à sources lumineuses (110) conformément à des données d'image, de façon à générer une lumière de non-projection, et une lumière de projection exigée par une image devant être affichée. L'objectif de projection (170) est destiné à recevoir la lumière de projection, de façon à projeter l'image. Le module de recyclage de lumière (160) sert à recycler la lumière de non-projection et à la diriger vers le module de modulation de lumière (140) pour qu'elle soit réutilisée. Le système de projection aboutit à une plage de gamme de couleurs plus large, à un meilleur effet d'image, et à un rapport d'utilisation de lumière supérieur.
PCT/CN2017/081312 2017-03-22 2017-04-20 Système de projection WO2018170987A1 (fr)

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