WO2018214283A1 - 激光照明设备及使用该设备的投影系统 - Google Patents

激光照明设备及使用该设备的投影系统 Download PDF

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Publication number
WO2018214283A1
WO2018214283A1 PCT/CN2017/095445 CN2017095445W WO2018214283A1 WO 2018214283 A1 WO2018214283 A1 WO 2018214283A1 CN 2017095445 W CN2017095445 W CN 2017095445W WO 2018214283 A1 WO2018214283 A1 WO 2018214283A1
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Prior art keywords
laser
light source
projection system
light
assembly
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Ceased
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PCT/CN2017/095445
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English (en)
French (fr)
Inventor
胡飞
郭祖强
杜鹏
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Application filed by Appotronics Corp Ltd filed Critical Appotronics Corp Ltd
Priority to US16/616,394 priority Critical patent/US11307487B2/en
Publication of WO2018214283A1 publication Critical patent/WO2018214283A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3167—Modulator illumination systems for polarizing the light beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F21V5/004—Refractors for light sources using microoptical elements for redirecting or diffusing light using microlenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G02B27/0966—Cylindrical lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/30—Collimators
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
    • G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
    • 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
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2053—Intensity control of illuminating light
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • 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
    • 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
    • G03B21/2066—Reflectors in illumination beam
    • 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
    • G03B21/2073—Polarisers in the lamp house
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/312—Driving therefor
    • H04N9/3126—Driving therefor for spatial light modulators in series
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3129—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] scanning a light beam on the display screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3164—Modulator illumination systems using multiple light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/155—Coordinated control of two or more light sources

Definitions

  • the present invention relates to the field of light sources, and more particularly to a laser lighting device and a projection system using the same.
  • the laser has the advantages of high energy density and small optical expansion, it can provide high brightness and long life light source, which reduces the design difficulty of the optical system, and gradually replaces the traditional light bulb and the LED light source in the field of projection display.
  • the color wheel is required to perform color projection, which increases the volume of the projection system.
  • the laser needs to continuously excite phosphors of different materials at high power to obtain fluorescence of three primary colors.
  • the power consumption of the projection system is large, and uniform rectangular light cannot be output.
  • the invention provides a laser illumination device for a projection system, comprising a laser light source, a light combining component, a microlens assembly and a plurality of cylindrical mirror assemblies, wherein the cylindrical mirror assembly is mounted on a transmission optical path of the laser light source
  • the microlens assembly is mounted on one side of the light combining assembly, and each of the cylindrical mirror assemblies includes a first cylindrical mirror array and a second cylindrical mirror array, the first cylindrical mirror array and The second cylindrical mirror arrays form a predetermined angle with each other, and the laser light source realizes the gray output of the corresponding pixel points of the projection system by adjusting the brightness of the laser light source.
  • the present invention also provides a projection system using the above laser illumination device, comprising a diffuser, a square rod assembly, an optical relay assembly, a light modulation assembly and an output assembly, the diffuser being disposed to be externally transmitted by the laser illumination device
  • the square rod assembly is disposed on a side of the diffuser away from the laser illumination device
  • the optical relay assembly is disposed between the square rod assembly and the light modulation assembly.
  • the output component is mounted on the light modulation group
  • the light modulator component regulates the output brightness of the laser light source corresponding to each pixel point in the image signal, and the light modulator component controls the laser light source to adjust itself
  • the brightness of the projection system achieves the grayscale output of the corresponding pixel of the projection system.
  • the laser illumination device provided by the invention distributes the uneven laser beam into a uniform rectangular laser beam by installing a cylindrical mirror assembly on the transmission optical path of the laser light source, and diverges the laser beam after the conversion of the microlens assembly. It is converted into a parallel laser beam to output a uniform parallel matrix laser beam, which is compact in structure and low in energy consumption.
  • the projection system of the invention can realize high dynamic range projection imaging of pictures and videos, and has good economic benefits.
  • FIG. 1 is a perspective view of a laser lighting apparatus in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic view showing the spatial distribution of a laser beam emitted from a laser light source.
  • FIG 3 is a schematic structural view of a projection system in a first embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a projection system in a second embodiment of the present invention.
  • Figure 5 is a schematic diagram of a scanning mirror scanning image signal.
  • Fig. 6 is a schematic structural view of a projection system in a third embodiment of the present invention.
  • Fig. 7 is a schematic structural view of a light combining mirror.
  • FIG. 1 is a perspective view of a laser illumination device according to an embodiment of the present invention.
  • the laser illumination device 100 is used as an illumination source for outputting uniform parallel matrix light
  • the laser illumination device 100 includes a laser light source. 1.
  • the optical component 3 is configured to synthesize a plurality of laser beams into a laser beam to increase the power of the laser beam and the optical energy density
  • the microlens assembly 4 is configured to convert the diverging laser beam into a parallel linear laser beam, thereby outputting the uniformity Parallel matrix laser.
  • the laser light source 1 is composed of a laser chip arranged in an array, the laser light source 1 includes a red light source 11 that outputs red laser light, a green light source 12 that outputs green laser light, and a blue light source 13 that outputs blue laser light, the red light source 11.
  • the laser beams output by the green light source 12 and the blue light source 13 are superimposed on each other, and the color is output based on the RGB mode.
  • the wavelength of the red laser light output by the red light source 11 is 638 nm
  • the wavelength of the green laser light output by the green light source 12 is 520 nm
  • the wavelength of the blue laser light output by the blue light source 13 is 455 nm.
  • the red light source 11 , the green light source 12 , and the blue light source 13 are distributed in a “product” shape, and surround the side surface of the light combining unit 3 .
  • the wavelength of the laser beam output by the red light source 11 is not limited to 638 nm in the embodiment, and may be a wavelength of other lengths; the wavelength of the laser beam output by the green light source 12 is not limited to 520 nm in the embodiment. It may also be a wavelength of other lengths; the wavelength of the laser beam output by the blue light source 13 is not limited to 455 nm in the present embodiment, and may be wavelengths of other lengths.
  • the cylindrical mirror assembly 2 includes a red cylindrical mirror assembly 21 mounted on the optical path of the red light source 11, a green cylindrical mirror assembly 22 mounted on the optical path of the green light source 12, and mounted on the blue The blue light cylindrical mirror assembly 23 on the optical path of the color light source 13.
  • the red cylindrical mirror assembly 21 is for uniformly illuminating a laser beam emitted by the red light source 11
  • the green cylindrical mirror assembly 22 is for uniformly illuminating a laser beam emitted by the green light source 12.
  • the blue cylindrical mirror assembly 23 It is used to uniformize the laser beam emitted by the blue light source 13.
  • the red cylindrical mirror assembly 21 includes a first cylindrical mirror array 211 and a second cylindrical mirror array 212, between a central axis of the first cylindrical mirror array 211 and a central axis of the second cylindrical mirror array 212. Form a preset angle.
  • the central axis of the first cylindrical mirror array 211 and the central axis of the second cylindrical mirror array 212 are perpendicular to each other.
  • a rotationally symmetric lens is generally used to collimate the output light of the laser chip, so that the spatial distribution of the output light is a rectangular shape, and the divergence angles of the two orthogonal directions of the output light are different, and an uneven rectangular laser is presented. distributed.
  • FIG. 2 is a schematic diagram showing the spatial distribution of the laser beam emitted by the laser light source 1.
  • the spatial distribution of the laser beam emitted by the laser light source 1 is rectangular, and the angular distribution is Gauss with different angles in the orthogonal direction ⁇ .
  • the dimension of the rectangle in the length direction is h 1 and the dimension in the width direction is h 2
  • the horizontal plane in which the laser beam is spatially distributed is denoted as S 1
  • the spatial distribution of the laser beam rectangle is located.
  • the vertical plane is denoted by S 2
  • the divergence angle formed by the laser beam with the surface S 1 is ⁇ 1
  • the divergence angle formed with the surface S 2 is ⁇ 2 .
  • the first cylindrical mirror array 211 and the second cylindrical mirror array 212 are used to adjust the divergence angle of the laser beam so that the divergence angle of the laser beam in the two orthogonal directions is the same, and the uniform matrix light is presented.
  • the focal length of the first cylindrical mirror array 211 is f 1
  • the focal length of the second cylindrical mirror array 212 is f 2 , after being focused by the first cylindrical mirror array 211 and the second cylindrical mirror array 212, spatial distribution of the size of the laser beam a longitudinal dimension h 1 h 2 in the width direction satisfies:
  • the focal lengths of the first cylindrical mirror array 211 and the second cylindrical mirror array 212 are set to satisfy:
  • the laser beam emitted by the laser light source 1 first passes through the second cylindrical mirror array 212 focusing on the laser beam width h 2 , and then passes through the first cylindrical mirror array focusing on the laser beam width h 1 . 211.
  • the second cylindrical mirror array 212 focusing on the laser beam width h 2 may also be mounted after the first cylindrical mirror array 211 focusing on the length h 1 .
  • the structure of the green cylindrical mirror assembly 22 and the blue cylindrical mirror assembly 23 is the same as that of the red cylindrical mirror assembly 21, and will not be described herein.
  • the light combining unit 3 is disposed at a substantially center of the circular distribution of the laser light source 1 and the cylindrical mirror assembly 2, and the light combining unit 3 is configured to combine multiple laser beams into one laser beam to increase the laser beam. Power and light energy density.
  • the light combining unit 3 is composed of a combination of filters.
  • the microlens assembly 4 is mounted on the optical path of the combined light beam outputted by the light combining component 3, and the microlens assembly 4 is used to convert the diverging laser beam into a parallel laser beam.
  • the microlens assembly 4 may be an existing refractive type microlens array, or an existing diffraction type microlens array.
  • FIG. 3 is a schematic structural diagram of the projection system 200 according to the first embodiment of the present invention.
  • the projection system 200 is used for projection display of images or video, and the projection system 200 includes a laser illumination device 100, a diffuser 20, a square bar assembly 30, an optical relay assembly 40, a light modulation assembly 50, and an output assembly 60.
  • the diffuser 20 is disposed on the optical path of the laser illumination device 100 in which the microlens assembly 4 transmits the laser beam outward, and the square rod assembly 30 is disposed on the diffuser 20 away from the laser illumination device 100.
  • the optical relay assembly 40 is disposed between the square rod assembly 30 and the light modulation assembly 50.
  • the output assembly 60 is disposed on the light modulation assembly 50 to transmit the modulated light of the laser beam. On the road.
  • the laser illumination device 100 is for outputting uniform parallel matrix light
  • the diffuser 20 is for eliminating the coherence of the laser beam, suppressing speckle phenomenon of laser imaging
  • the square rod assembly 30 is used for uniform laser beam in space
  • the intensity of the incident laser beam is destroyed by multiple reflections in the square rod assembly 30 to destroy its original interference, thereby obtaining a laser beam of uniform intensity distribution at the exit end of the square rod assembly 30,
  • the optical relay assembly 40 is used to transmit a laser beam, and a laser beam emitted from the square rod assembly 30 is imaged on the light modulation assembly 50, the light modulation assembly 50 for modulating a laser beam.
  • the light modulation component 50 is a spatial light modulator 51, and the spatial light modulator 51 is controlled by an image signal for modulating the spatial distribution of the laser beam.
  • the output assembly 60 is for outputting a laser beam that is transmitted to an external screen.
  • the output component 60 is an imaging objective lens 61.
  • the matrix light output by the laser illumination device 100 is imaged by the optical relay assembly 40 on the light modulation component 50 after being de-cohered by the diffuser 20 and homogenized by the square rod assembly 30.
  • the modulation of the light modulation component 50 is transmitted by the output component 60 to an external projection screen to effect projection imaging.
  • the projection system 200 cooperates with the intensity modulation algorithm of the laser light source 1 in the modulated laser illumination device 100 to realize high dynamic range projection imaging, so that the projection imaging can clearly display the details of the dark portion or the highlight portion.
  • the intensity modulation algorithm acquires the gradation distribution of the image signal to be projected according to the spatial light modulator 51, and controls the brightness of the pixel point corresponding to each laser chip, by dynamically modulating the laser light source 1 in the laser illumination device 100.
  • the intensity of the excitation light enables a high dynamic range projection imaging.
  • the maximum brightness that the laser light source 1 can output is denoted as I max .
  • the gray value of the highest pixel point of the brightness is obtained by the maximum value algorithm; if a certain pixel point is in the image signal
  • the brightness I a of the laser light source 1 corresponding to the pixel point is according to the formula Calculated. For example, when the gradation of the highest luminance pixel in an image signal is 200 and the gradation of a certain pixel is 100, the luminance of the laser light source 1 output to the pixel is
  • the gradation value of the highest luminance pixel point is obtained by the maximum value algorithm.
  • the gray value obtained by obtaining the highest pixel of the brightness is not limited to the maximum value algorithm in the embodiment, and the gray value of the highest pixel point of the brightness can be obtained by other algorithms such as the cycle comparison and the maximum value.
  • the gray scale of the spatial light modulator 51 is 8 bits.
  • the gray scale of the spatial light modulator 51 is not limited to 8 bits in the embodiment, and may be other digits, such as 4 bits, 6 bits, and the like.
  • the output brightness of the pixel of the highest brightness of the image signal of each frame of the laser light source 1 is constant, both being I max , and the output brightness of the pixel of the lowest brightness is Dynamically increasing the contrast and realizing high dynamic range projection imaging; since the brightness of other dark pixels is reduced by reducing the intensity of the laser light source 1, the power consumption and loss of the laser light source 1 can be reduced.
  • FIG. 4 is a schematic structural diagram of a projection system 200a according to a second embodiment of the present invention.
  • the projection system 200 is used for projection display of images and videos, and the projection system 200a includes a laser illumination device 100 and diffusion.
  • the structure and connection relationship of the laser illumination device 100, the diffuser 20, the square bar assembly 30, and the optical relay assembly 40 are the laser illumination device 100, the diffuser 20, the square bar assembly 30, and the light in the first embodiment of the present invention.
  • the structure and connection relationship of the relay component 40 are the same, and are not described herein.
  • the light modulation component 50 is mounted on the output component 60 and the laser lighting device Between the devices 100, the light modulation component 50 performs light enhancement based on the image signals obtained by the output component 60.
  • the output component 60 is mounted on the transmission optical path of the optical relay component 40.
  • the output component 60 is a scanning mirror 62.
  • the scanning mirror 62 is used to scan signals of different pixel composition areas on the external projection screen. After the scanning mirror 62 in the output component 60 acquires signals of different pixel points on the external projection screen, the light modulation component 50 synchronously controls the laser light source 1 in the laser illumination device 100 to perform light emphasizing.
  • FIG. 5 is a schematic diagram of the scanning mirror 62 scanning an image signal.
  • the scanning mirror 62 sequentially scans different pixel regions on the same horizontal scanning line, such as scanning the A 1 region first, and then sequentially scanning A 2 , A 3 , and the like.
  • the RGB signal of the A 1 region pixel point acquired by the scanning mirror 62 is (x, y, z), then the light modulation component 50 controls the laser light source 1 in the laser illumination device 100 according to the acquired RGB signal.
  • the red light source 11 outputs red laser light intensity I R * x / I L
  • the green laser light source 12 output from the green light intensity I G * y / I L
  • the blue light source 13 The output blue laser light intensity is I B *z/I L
  • I R is the maximum light intensity of the red laser light output by the red light source 11
  • I G is the maximum light intensity of the green light source 12 outputting the green laser light
  • I B is blue
  • I L is the maximum gray level of the laser light source 1, and the maximum gray level is determined by the number of bits of the gray scale of the laser light source 1.
  • the laser light source 1 is an 8-bit gray scale, and the corresponding maximum gray level I L of the laser light source 1 is 255, and the red laser light intensity output by the red light source 11 is I R *x. /255, the green laser light intensity output by the green light source 12 is I G *y/255, and the blue laser light intensity output by the blue light source 13 is I B *z/255.
  • the RGB signal of the A 1 region pixel point acquired by the scanning mirror 62 is (50, 100, 150), then the light modulation component 50 controls the laser light source 1 in the laser illumination device 100 according to the acquired
  • the RGB signal outputs light intensity
  • the red laser light source 11 outputs a red laser light intensity of I R *50/255
  • the green light source 12 outputs a green laser light intensity of I G *100/255
  • the blue light source 13 outputs blue laser light. Strong for I B *150/255.
  • the gray scale of the laser light source 1 is not limited to 8 bits in the embodiment, and may be other digits, such as 4 bits, 6 bits, and the like.
  • the scanning mirror 62 scans the RGB signals of the pixel points of the A 2 region, and the laser light source 1 and the scanning mirror 62 are controlled by the light modulation component 50.
  • signal scanning and light intensity output of all regional pixel points are successively completed, thereby realizing projection imaging of image and video signals.
  • FIG. 6 is a schematic structural diagram of a projection system 200b according to a third embodiment of the present invention.
  • the projection system 200b is used for projection display of images and videos, and the projection system 200b includes a laser illumination device 100 and diffusion.
  • the structure and connection relationship of the laser illumination device 100, the diffuser 20, the square bar assembly 30, the optical relay assembly 40, the light modulation assembly 50, and the output assembly 60 are the same as the laser illumination device 100 in the first embodiment of the present invention, and the diffusion
  • the structure and the connection relationship of the device 20, the square bar assembly 30, the optical relay assembly 40, the light modulation component 50, and the output component 60 are the same, and are not described herein.
  • the light recovery unit 70 is configured to recover S-polarized light that cannot be used for illumination in the optical path, convert the S-polarized light into P-polarized light, and then re-inject the P-polarized light into the optical path, thereby improving the utilization efficiency of the laser beam energy.
  • the light recovery component 70 includes an LCD modulator 71, a PBS board 72, a mirror assembly 73, a half wave plate 74, a relay lens 75, and a light combining mirror 76.
  • the mirror assembly 73 includes a first mirror 731 and a
  • the two mirrors 732, the LCD modulator 71 and the PBS board 72 are sequentially disposed between the square rod assembly 30 and the optical relay assembly 40.
  • the half wave plate 74 and the relay lens 75 are sequentially installed in the Between the first mirror 731 and the second mirror 732, the light combining mirror 76 is disposed between the laser illumination device 100 and the square rod assembly 30.
  • the LCD modulator 71 is for modulating a laser beam emitted from the square rod assembly 30, and the laser beam emitted from the square rod assembly 30 has P-polarized light for illumination and S-polarized light that cannot be used for illumination.
  • the PBS plate 72 is used to filter P-polarized light and reflect S-polarized light, P-polarized light for illumination passes through the PBS plate 72 and continues to be transmitted to the optical relay assembly 40, and cannot be used for S-polarization of illumination. Light is reflected by the PBS plate and transmitted to the first mirror 731.
  • the first mirror 731 reflects the S-polarized light such that the S-polarized light sequentially passes through the half-wave plate 74 and the relay lens 75, and the half-wave plate 74 is used to convert the S-polarized light into the P-polarized light.
  • the relay lens 75 is used for recovery Distorted laser waveform during complex light transmission. At this time, the S-polarized light emitted from the square rod assembly 30 is converted into P-polarized light, and the waveform is restored in the relay lens 75 and then transmitted to the second mirror 732.
  • the recovered P-polarized light is reflected by the second mirror 732 to the light combining mirror 76, and the combining mirror 76 combines the P-polarized light with the laser light emitted by the laser illumination device 100, and transmits the same to the In the square rod assembly 30, light recovery is achieved, and the utilization efficiency of light energy is increased.
  • FIG. 7 is a schematic structural diagram of the light combining mirror 76 for combining the converted P-polarized light and the parallel matrix light emitted from the laser illumination device 100.
  • the light mirror 76 includes an AR coating 761 and a high reflective film 762.
  • the AR coating 761 is received in the high reflective film 762.
  • the parallel matrix light emitted by the laser illumination device 100 directly passes through the AR coating 761 and is forwardly transferred.
  • the P-polarized light is transmitted forward under the reflection of the high-reflection film 762, and the parallel-substrate light and the P-polarized light transmitted forward are combined in accordance with the extended amount of light, thereby realizing the light recovery component. 70 pairs of light recovery of S-polarized light that cannot be used for illumination.
  • the projection system 200b can modulate the intensity of the light output by the laser light source 1 and the LCD modulator 71 in conjunction with an intensity modulation algorithm to achieve a high dynamic range of projection imaging.
  • the intensity modulation algorithm acquires the brightness distribution of the image signal to be projected by the spatial light modulator 51, and dynamically modulates the intensity of the output light of the laser light source 1 and the LCD modulator 71 according to the brightness distribution of the image signal to be projected, thereby realizing a high dynamic range. Projection imaging.
  • Both the spatial light modulator 51 and the LCD modulator 71 can output gray scales within a certain range.
  • the maximum brightness that the laser light source 1 can output is recorded as I max .
  • the gray value of the highest pixel point is obtained by the maximum value algorithm; if the gray value of a certain pixel point is a, the brightness of the laser light source 1 corresponding to the pixel point I a according to the formula Calculating, the brightness I b of the LCD modulator 71 corresponding to the pixel point is according to the formula Calculated.
  • I M is the maximum gray level of the LCD modulator 71, which is determined by the number of bits of the gray level of the LCD modulator 71.
  • the LCD modulator 71 is an 8-bit gray scale, and the corresponding maximum gray level I M of the LCD modulator 71 is 255, and the brightness I b of the LCD modulator 71 is according to the formula. Calculated.
  • the luminance of the laser light source 1 output to the pixel is 200 and the gradation of a certain pixel is 100
  • the luminance of the laser light source 1 output to the pixel is The brightness of the LCD modulator output to the pixel
  • the gray scale of the LCD modulator 71 is not limited to 8 bits in the embodiment, and may be other digits, such as 4 bits, 6 bits, and the like.
  • the gradation value of the highest luminance pixel point is obtained by the maximum value algorithm.
  • the gray value obtained by obtaining the highest pixel of the brightness is not limited to the maximum value algorithm in the embodiment, and the gray value of the highest pixel point of the brightness can be obtained by other algorithms such as the cycle comparison and the maximum value.
  • the laser light source 1, the LCD modulator 71 and the spatial light modulator 51 have a certain gray scale, and the gray scale of the projection system 200 is a laser light source 1, an LCD modulator 71, and a spatial light.
  • the product of the gray scale of the modulator 51 dynamically increases the contrast and enables high dynamic range projection imaging.
  • the laser illumination apparatus 100 of the present invention by arranging the cylindrical mirror assembly 2 on the transmission optical path of the laser light source 1, the uneven laser beam is condensed into a uniform matrix laser beam, which is diverged by the conversion action of the microlens assembly 4.
  • the laser beam is converted into a parallel laser beam, thereby outputting a uniform parallel matrix laser beam, which is compact in structure and low in energy consumption.
  • the projection system 200 of the invention can realize projection imaging of high dynamic range of pictures and videos, and has good economic benefits.

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Abstract

一种激光照明设备（100）以及包括该激光照明设备（100）的投影系统（200、200a、200b）包括激光光源（1）、合光组件（3）、微透镜组件（4）及若干柱面镜组件（2），若干柱面镜组件（2）装设于激光光源（1）的传输光路上，微透镜组件（4）装设于合光组件（3）的一侧，每一柱面镜组件（2）包括第一柱面镜阵列（211）及第二柱面镜阵列（212），第一柱面镜阵列（211）及第二柱面镜阵（212）列相互形成一预设的夹角。

Description

激光照明设备及使用该设备的投影系统 技术领域
本发明涉及光源领域，尤其涉及一种激光照明设备及使用该设备的投影系统。
背景技术
目前，投影显示技术具有愈加广泛的应用。由于激光具有能量密度高、光学扩展量小的优势，能够提供高亮度与长寿命的光源，降低了光学系统的设计难度，在投影显示领域正逐步取代传统灯泡与LED光源。现有的投影系统，需要借助色轮才能进行色彩投影，增大了投影系统的体积。同时激光器需要在大功率下持续激发不同材料的荧光粉以得到三基色的荧光，投影系统的功耗很大，也无法输出均匀的矩形光。
发明内容
本发明提供一种激光照明设备，用于投影系统，包括激光光源、合光组件、微透镜组件及若干柱面镜组件，若干所述柱面镜组件装设于所述激光光源的传输光路上，所述微透镜组件装设于所述合光组件的一侧，每一所述柱面镜组件包括第一柱面镜阵列及第二柱面镜阵列，所述第一柱面镜阵列与第二柱面镜阵列相互形成一预设的夹角，所述激光光源通过调整自身的亮度实现投影系统对应像素点的灰度输出。
本发明还提供一种采用上述激光照明设备的投影系统，包括扩散器、方棒组件、光中继组件、光调制组件及输出组件，所述扩散器装设于所述激光照明设备向外传输激光束的光路上，所述方棒组件装设于所述扩散器远离所述激光照明设备的一侧，所述光中继组件装设于所述方棒组件及光调制组件之间，所述输出组件装设于所述光调制组 件向外传输调制后激光束的光路上，所述光调制器组件调控图像信号中每一像素点对应的所述激光光源的输出亮度，所述光调制器组件控制所述激光光源通过调整自身的亮度实现投影系统对应像素点的灰度输出。
本发明提供的激光照明设备，通过在激光光源的传输光路上装设柱面镜组件，将不均匀的激光束汇聚为均匀的矩形激光束，经微透镜组件的转换作用后将发散的激光束转变为平行的激光束，从而输出均匀的平行矩阵激光束，其结构紧凑，能耗低。本发明的投影系统，能够实现图片及视频的高动态范围投影成像，具有良好的经济效益。
附图说明
图1为本发明一实施例中的激光照明设备的立体示意图。
图2为激光光源发出的激光束的空间分布示意图。
图3为本发明第一实施例中投影系统的结构示意图。
图4为本发明第二实施例中投影系统的结构示意图。
图5为扫描镜扫描图像信号的示意图。
图6为本发明第三实施例中投影系统的结构示意图。
图7为合光镜的结构示意图。
主要元件符号说明
激光照明设备      100
激光光源          1
红色光源          11
绿色光源          12
蓝色光源          13
柱面镜组件        2
红光柱面镜组件    21
第一柱面镜阵列    211
第二柱面镜阵列    212
绿光柱面镜组件    22
蓝光柱面镜组件    23
合光组件          3
微透镜组件        4
投影系统          200、200a、200b
扩散器            20
方棒组件          30
光中继组件        40
光调制组件        50
空间光调制器      51
输出组件          60
成像物镜          61
扫描镜            62
光回收组件        70
LCD调制器         71
PBS板             72
反射镜组件        73
第一反射镜        731
第二反射镜        732
半波片            74
中继透镜          75
合光镜            76
AR镀膜            761
高反膜            762
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方 案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，当组件被称为“装设于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1，图1为本发明一实施例中的激光照明设备的立体示意图，所述激光照明设备100作为照明光源，用于输出均匀的平行矩阵光，所述激光照明设备100包括激光光源1、柱面镜组件2、合光组件3及微透镜组件4，所述柱面镜组件2装设于所述激光光源1的传输光路上，所述微透镜组件4装设于所述合光组件3的一侧，所述激光光源1用于输出照明激光束，所述柱面镜组件2用于汇聚照明激光束，使不均匀的激光束汇聚为均匀的矩阵激光束，所述合光组件3用于将多束激光合成为一束激光，增大激光束的功率与光能量密度，所述微透镜组件4用于将发散的激光束转变为平行的线性激光束，从而输出均匀的平行矩阵激光。
所述激光光源1由阵列排布的激光芯片构成，所述激光光源1包括输出红色激光的红色光源11、输出绿色激光的绿色光源12及输出蓝色激光的蓝色光源13，所述红色光源11、绿色光源12及蓝色光源13输出的激光束相互叠加，基于RGB模式输出色彩。本实施方式中，所述红色光源11输出的红色激光的波长为638nm，所述绿色光源12输出的绿色激光的波长为520nm，所述蓝色光源13输出的蓝色激光的波长为455nm，所述红色光源11、绿色光源12及蓝色光源13呈“品”状分布，环绕在所述合光组件3的侧面。
可以理解，所述红色光源11输出的激光束的波长不限于本实施方式中的638nm，还可为其他长度的波长；所述绿色光源12输出的激光束的波长不限于本实施方式中的520nm，还可为其他长度的波长；所述蓝色光源13输出的激光束的波长不限于本实施方式中的455nm，还可为其他长度的波长。
所述柱面镜组件2包括装设于所述红色光源11光路上的红光柱面镜组件21、装设于所述绿色光源12光路上的绿光柱面镜组件22及装设于所述蓝色光源13光路上的蓝光柱面镜组件23。所述红光柱面镜组件21用于均匀所述红色光源11发出的激光束，所述绿光柱面镜组件22用于均匀所述绿色光源12发出的激光束，所述蓝光柱面镜组件23用于均匀所述蓝色光源13发出的激光束。所述红光柱面镜组件21包括第一柱面镜阵列211及第二柱面镜阵列212，所述第一柱面镜阵列211的中心轴线与第二柱面镜阵列212的中心轴线之间形成一预设的夹角。本实施方式中，所述第一柱面镜阵列211的中心轴线与第二柱面镜阵列212的中心轴线相互垂直。
目前的激光器封装工艺中，通常采用旋转对称的透镜来准直激光器芯片的输出光，使得输出光的空间分布为矩形形状，输出光两正交方向的发散角度不同，呈现出不均匀的矩形激光分布。
请一并参阅图2，图2为所述激光光源1发出的激光束的空间分布示意图，所述激光光源1发出的激光束的空间分布为矩形，角度分布为正交方向σ角度不同的高斯分布，为方便描述，矩形在长度方向的尺寸为h1，在宽度方向的尺寸为h2，将激光束矩形空间分布中宽所在的水平面记为S1，将激光束矩形空间分布中长所在的垂直面记为S2，所述激光束与面S1形成的发散角度为σ1，与面S2形成的发散角度为σ2。
所述第一柱面镜阵列211及第二柱面镜阵列212用于调整激光束的发散角度，使得激光束在两正交方向上的发散角度相同，呈现出均匀的矩阵光。所述第一柱面镜阵列211的焦距为f1，所述第二柱面镜阵列212的焦距为f2，经第一柱面镜阵列211及第二柱面镜阵列212 的聚焦后，激光束的空间分布在长度方向的尺寸h1与宽度方向的尺寸h2满足：
h1＝f1×tan σ1
h2＝f2×tan σ2
设置第一柱面镜阵列211及第二柱面镜阵列212的焦距，使其满足：
Figure PCTCN2017095445-appb-000001
则所述激光束与面S1形成的发散角度σ1及与面S2形成的发散角度σ2满足：σ1＝σ2。由于激光束的长度h1大于宽度h2，使得第一柱面镜阵列211的焦距f1大于第二柱面镜阵列212的焦距f2。通过所述第一柱面镜阵列211及第二柱面镜阵列212的聚焦后，激光束在两个正交方向的发射角相同，转变为均匀的矩阵光。
本实施方式中，所述激光光源1发出的激光束先穿过对激光束宽度h2聚焦的第二柱面镜阵列212，再穿过对激光束宽度h1聚焦的第一柱面镜阵列211。
可以理解，对激光束宽度h2聚焦的第二柱面镜阵列212也可以装设于对长度h1聚焦的第一柱面镜阵列211之后。
所述绿光柱面镜组件22及蓝光柱面镜组件23的结构与红光柱面镜组件21的组成与结构相同，在此不做赘述。
所述合光组件3装设于所述激光光源1和柱面镜组件2环状分布的大致中心处，所述合光组件3用于将多束激光合并为一束激光，增大激光束的功率与光能量密度。所述合光组件3由滤光片组合而成。
所述微透镜组件4装设于所述合光组件3输出合并后激光束的光路上，所述微透镜组件4用于将发散的激光束转变为平行的激光束。所述微透镜组件4可采用现有的折射型微透镜阵列，也可采用现有的衍射型微透镜阵列。
本发明还提供使用上述激光照明设备100的投影系统200，请参阅图3，图3为本发明第一实施例中所述投影系统200的结构示意图， 所述投影系统200用于图像或视频的投影显示，所述投影系统200包括激光照明设备100、扩散器20、方棒组件30、光中继组件40、光调制组件50及输出组件60。
所述扩散器20装设于所述激光照明设备100中微透镜组件4向外传输激光束的光路上，所述方棒组件30装设于所述扩散器20远离所述激光照明设备100的一侧，所述光中继组件40装设于所述方棒组件30及光调制组件50之间，所述输出组件60装设于所述光调制组件50向外传输调制后激光束的光路上。所述激光照明设备100用于输出均匀的平行矩阵光，所述扩散器20用于消除激光束的相干性，抑制激光成像的散斑现象，所述方棒组件30用于均匀激光束在空间的强度，使入射的激光束在方棒组件30内多次反射后破坏其原先的干涉作用，从而在所述方棒组件30的出射端得到强度均匀分布的激光束，所述光中继组件40用于传输激光束，将所述方棒组件30出射的激光束成像于所述光调制组件50上，所述光调制组件50用于调制激光束。本实施方式中，所述光调制组件50为空间光调制器51，所述空间光调制器51由图像信号控制，用于调制激光束的空间分布。所述输出组件60用于输出激光束，将激光束传输至外部屏幕处。本实施方式中，所述输出组件60为成像物镜61。
所述激光照明设备100输出的矩阵光，经过所述扩散器20的消相干及方棒组件30的匀光后，由所述光中继组件40成像于所述光调制组件50上，再经所述光调制组件50的调制后，由输出组件60传输至外部投影屏幕上，从而实现投影成像。
所述投影系统200配合调制激光照明设备100中激光光源1的强度调制算法，可实现高动态范围的投影成像，使投影成像能够清晰显示出暗处或高光部分的细节。该强度调制算法依据所述空间光调制器51获取需要投影的图像信号的灰度分布，控制每一激光芯片对应控制的像素点的亮度，通过动态调制所述激光照明设备100中激光光源1的激发光的强度，从而实现高动态范围的投影成像。
以8位空间光调制器为例，其能够实现0-255灰度范围内的光调 制。在某一图像信号中，所述激光光源1能够输出的最大亮度记为Imax，首先通过求最大值算法获得亮度最高像素点的灰度值为A；如果在图像信号中某一像素点的灰度值为a，则该像素点对应的激光光源1的亮度Ia按照公式
Figure PCTCN2017095445-appb-000002
计算得到。例如，当某一图像信号中亮度最高像素点的灰度为200，某一像素点的灰度为100，则激光光源1对该像素点输出的亮度为
Figure PCTCN2017095445-appb-000003
本实施方式中，通过求最大值算法获得亮度最高像素点的灰度值。
可以理解，获得亮度最高像素点的灰度值不限于本实施方式中的求最大值算法，还可用循环比较求最值等其他算法获得亮度最高像素点的灰度值。
本实施方式中，所述空间光调制器51的灰阶为8位。
可以理解，所述空间光调制器51的灰阶不限于本实施方式中的8位，还可为其他位数，如4位、6位等。
根据该算法与调制过程，可以保证所述激光光源1对每一帧图像信号的最高亮度的像素点的输出亮度不变，均为Imax，而对最低亮度像素点的输出亮度为
Figure PCTCN2017095445-appb-000004
动态的提高了对比度，实现高动态范围的投影成像；由于通过降低激光光源1的强度降低其他较暗像素的亮度，因此能够降低激光光源1的能耗及损耗。
请参阅图4，图4为本发明第二实施例中所述投影系统200a的结构示意图，所述投影系统200用于图像及视频的投影显示，所述投影系统200a包括激光照明设备100、扩散器20、方棒组件30、光中继组件40、光调制组件50、输出组件60。
所述激光照明设备100、扩散器20、方棒组件30及光中继组件40的结构和连接关系与本发明第一实施例中的激光照明设备100、扩散器20、方棒组件30及光中继组件40的结构和连接关系相同，在此不做赘述。所述光调制组件50装设于所述输出组件60及激光照明设 备100之间，所述光调制组件50根据所述输出组件60获得的图像信号进行光强调制。所述输出组件60装设于所述光中继组件40的传输光路上。本实施方式中，所述输出组件60为扫描镜62。所述扫描镜62用于扫描外部投影屏幕上不同像素组成区域的信号。所述输出组件60中的扫描镜62获取外部投影屏幕上不同像素点的信号后，所述光调制组件50同步控制所述激光照明设备100中激光光源1进行光强调制。
请参阅图5，图5为所述扫描镜62扫描图像信号的示意图。所述扫描镜62依次扫描同一水平扫描线上的不同像素区域，如先扫描A1区域，再顺次扫描A2、A3等区域。在某一时刻，所述扫描镜62获取的A1区域像素点的RGB信号为(x，y，z)，则所述光调制组件50控制激光照明设备100中激光光源1依据获取的RGB信号输出光强，所述红色光源11输出的红色激光光强为IR*x/IL，所述绿色光源12输出的绿色激光光强为IG*y/IL，所述蓝色光源13输出的蓝色激光光强为IB*z/IL，IR为红色光源11输出的红色激光的最大光强，IG为绿色光源12输出绿色激光的最大光强，IB为蓝色光源13输出的蓝色激光的最大光强，IL为所述激光光源1的最大灰度等级，该最大灰度等级由所述激光光源1灰阶的位数决定。
本实施方式中，所述激光光源1为8位灰阶，相对应的所述激光光源1的最大灰度等级IL为255，所述红色光源11输出的红色激光光强为IR*x/255，绿色光源12输出的绿色激光光强为IG*y/255，蓝色光源13输出的蓝色激光光强为IB*z/255。
例如，在某一时刻，所述扫描镜62获取的A1区域像素点的RGB信号为(50，100，150)，则所述光调制组件50控制激光照明设备100中激光光源1依据获取的RGB信号输出光强，红色光源11输出的红色激光光强为IR*50/255，绿色光源12输出的绿色激光光强为IG*100/255，蓝色光源13输出的蓝色激光光强为IB*150/255。
可以理解，所述激光光源1的灰阶不限于本实施方式中的8位，还可为其他位数，如4位、6位等。
所述激光光源1输出该A1区域像素点的激光束后，所述扫描镜62扫描A2区域像素点的RGB信号，所述激光光源1和所述扫描镜62在光调制组件50的控制下，逐次完成所有区域像素点的信号扫描与光强输出，从而实现图像及视频信号的投影成像。
请参阅图6，图6为本发明第三实施例中所述投影系统200b的结构示意图，所述投影系统200b用于图像及视频的投影显示，所述投影系统200b包括激光照明设备100、扩散器20、方棒组件30、光中继组件40、光调制组件50、输出组件60及光回收组件70。
所述激光照明设备100、扩散器20、方棒组件30、光中继组件40、光调制组件50及输出组件60的结构和连接关系与本发明第一实施例中的激光照明设备100、扩散器20、方棒组件30、光中继组件40、光调制组件50及输出组件60的结构和连接关系相同，在此不做赘述。
所述光回收组件70用于回收光路中无法用于照明的S偏振光，将S偏振光转换为P偏振光后将P偏振光重新注入光路，从而提高激光束能量的利用效率。所述光回收组件70包括LCD调制器71、PBS板72、反射镜组件73、半波片74、中继透镜75及合光镜76，所述反射镜组件73包括第一反射镜731及第二反射镜732，所述LCD调制器71及PBS板72依次装设于所述方棒组件30及光中继组件40之间，所述半波片74及中继透镜75依次装设于所述第一反射镜731及第二反射镜732之间，所述合光镜76装设于所述激光照明设备100与所述方棒组件30之间。
所述LCD调制器71用于调制从所述方棒组件30中出射的激光束，从所述方棒组件30中出射的激光束具有用于照明的P偏振光和无法用于照明的S偏振光两种光分量。所述PBS板72用于过滤P偏振光并反射S偏振光，用于照明的P偏振光穿过所述PBS板72并继续传递至光中继组件40处，而无法用于照明的S偏振光被所述PBS板反射并传递至第一反射镜731处。所述第一反射镜731反射该S偏振光，使得该S偏振光依次穿过所述半波片74及中继透镜75，所述半波片74用于将S偏振光转变为P偏振光，所述中继透镜75用于恢 复光传递过程中失真的激光波形。此时，从所述方棒组件30中出射的S偏振光被转换为P偏振光，在所述中继透镜75中恢复波形后传递至所述第二反射镜732处。恢复后的P偏振光由第二反射镜732反射至所述合光镜76处，所述合光镜76将P偏振光与所述激光照明设备100出射的激光进行合并，再传递至所述方棒组件30内，从而实现光回收，增大光能量的利用效率。
请一并参阅图7，图7为所述合光镜76的结构示意图，所述合光镜76用于合并转换后的P偏振光和从激光照明设备100出射的平行矩阵光，所述合光镜76包括AR镀膜761及高反膜762，所述AR镀膜761收容于所述高反膜762内，所述激光照明设备100出射的平行矩阵光直接穿过AR镀膜761并向前传递，而P偏振光则在所述高反膜762的反射作用下向前传递，同时向前传递的平行矩阵光和P偏振光依据扩展量合光的方式发生合光，从而实现所述光回收组件70对无法用于照明的S偏振光的光回收。
所述投影系统200b配合强度调制算法可以调制所述激光光源1及LCD调制器71输出的光强，可实现投影成像的高动态范围。该强度调制算法经空间光调制器51获取需要投影的图像信号的亮度分布，依据需要投影的图像信号的亮度分布动态调制所述激光光源1及LCD调制器71输出光的强度，实现高动态范围的投影成像。
所述空间光调制器51及LCD调制器71均能输出一定范围内的灰度。在某一图像信号中，所述激光光源1能够输出的最大亮度记为Imax，首先通过求最大值算法获得亮度最高像素点的灰度值为A；如果某一像素点的灰度值为a，则所述该像素点对应的激光光源1的亮度Ia按照公式
Figure PCTCN2017095445-appb-000005
计算得到，该像素点对应的LCD调制器71的亮度Ib按照公式
Figure PCTCN2017095445-appb-000006
计算得到。IM为所述LCD调制器71的最大灰度等级，该最大灰度等级由所述LCD调制器71灰阶的位数决定。
本实施方式中，所述LCD调制器71为8位灰阶，相对应的所述 LCD调制器71的最大灰度等级IM为255，所述LCD调制器71的亮度Ib按照公式
Figure PCTCN2017095445-appb-000007
计算得到。
例如，当某一图像信号中亮度最高像素点的灰度为200，某一像素点的灰度为100，则激光光源1对该像素点输出的亮度为
Figure PCTCN2017095445-appb-000008
LCD调制器对该像素点输出的亮度为
Figure PCTCN2017095445-appb-000009
可以理解，所述LCD调制器71的灰阶不限于本实施方式中的8位，还可为其他位数，如4位、6位等。
本实施方式中，通过求最大值算法获得亮度最高像素点的灰度值。
可以理解，获得亮度最高像素点的灰度值不限于本实施方式中的求最大值算法，还可用循环比较求最值等其他算法获得亮度最高像素点的灰度值。
根据该算法与调制过程，所述激光光源1、LCD调制器71及空间光调制器51均有一定的灰阶，所述投影系统200的灰阶为激光光源1、LCD调制器71及空间光调制器51灰阶的乘积，动态的提高了对比度，实现高动态范围的投影成像。
本发明的激光照明设备100，通过在激光光源1的传输光路上装设柱面镜组件2，将不均匀的激光束汇聚为均匀的矩阵激光束，经微透镜组件4的转换作用后将发散的激光束转变为平行的激光束，从而输出均匀的平行矩阵激光束，其结构紧凑，能耗低。本发明的投影系统200，能够实现图片及视频高动态范围的投影成像，具有良好的经济效益。
本技术领域的普通技术人员应当认识到，以上的实施方式仅是用来说明本发明，而并非用作为对本发明的限定，只要在本发明的实质精神范围的内，对以上实施方式所作的适当改变和变化都落在本发明要求保护的范围之内。

Claims (16)

  1. 一种激光照明设备，用于投影系统，其特征在于：包括激光光源、合光组件、微透镜组件及若干柱面镜组件，若干所述柱面镜组件装设于所述激光光源的传输光路上，所述微透镜组件装设于所述合光组件的一侧，每一所述柱面镜组件包括第一柱面镜阵列及第二柱面镜阵列，所述第一柱面镜阵列与第二柱面镜阵列相互形成一预设的夹角，所述激光光源通过调整自身的亮度实现投影系统对应像素点的灰度输出。
  2. 如权利要求1所述的激光照明设备，其特征在于：所述第一柱面镜阵列与第二柱面镜阵列相互垂直。
  3. 如权利要求1所述的激光照明设备，其特征在于：所述激光光源包括输出红色激光的红色光源、输出绿色激光的绿色光源及输出蓝色激光的蓝色光源，所述柱面镜组件的数量为三个，三个所述柱面镜组件分别装设于所述红色光源、绿色光源及蓝色光源的传输光路上。
  4. 如权利要求3所述的激光照明设备，其特征在于：所述红色光源输出的红色激光的波长为638nm，所述绿色光源输出的绿色激光的波长为520nm，所述蓝色光源输出的蓝色激光的波长为455nm。
  5. 一种采用权利要求1-4任意一项所述激光照明设备的投影系统，包括扩散器、方棒组件、光中继组件、光调制组件及输出组件，所述扩散器装设于所述激光照明设备向外传输激光束的光路上，所述方棒组件装设于所述扩散器远离所述激光照明设备的一侧，所述光中继组件装设于所述方棒组件及光调制组件之间，所述输出组件装设于所述光调制组件向外传输调制后激光束的光路上，所述光调制器组件调控图像信号中每一像素点对应的所述激光光源的输出亮度，所述光调制器组件控制所述激光光源通过调整自身的亮度实现投影系统对应像素点的灰度输出。
  6. 如权利要求5所述的投影系统，其特征在于：所述光调制组件为空间光调制器。
  7. 如权利要求6所述的投影系统，其特征在于：所述输出组件为 成像物镜。
  8. 如权利要求5所述的投影系统，其特征在于：所述投影系统获取的图像信号中通过算法获得亮度最高像素点的灰度值为A，该像素点对应的所述激光光源的亮度最大值为Imax；如果某一像素点的灰度值为a，则所述该像素点对应的所述激光光源的亮度Ia按照公式
    Figure PCTCN2017095445-appb-100001
    计算得到，以实现所述投影系统高动态范围的投影成像。
  9. 如权利要求5所述的投影系统，其特征在于：所述输出组件为扫描镜，所述扫描镜获取的图片及视频信号中某一像素点的RGB信号为(x，y，z)，所述红色光源输出的红色激光的最大光强为IR，所述绿色光源输出绿色激光的最大光强为IG，所述激光光源的最大灰度等级为IL，所述光调制组件控制激光照明设备中激光光源依据获取的RGB信号输出光强，所述红色光源输出的红色激光光强为IR*X/IL，所述绿色光源输出的绿色激光光强为IG*y/IL，所述蓝色光源输出的蓝色激光光强为IB*z/IL。
  10. 如权利要求9所述的投影系统，其特征在于：所述激光光源为8位灰阶，所述激光光源的最大灰度等级IL为255。
  11. 如权利要求5所述的投影系统，其特征在于：所述投影系统包括光回收组件，所述光回收组包括LCD调制器、PBS板、反射镜组件、半波片、中继透镜及合光镜，所述反射镜组件包括第一反射镜及第二反射镜，所述LCD调制器及PBS板依次装设于所述方棒组件及光中继组件之间，所述半波片及中继透镜依次装设于所述第一反射镜及第二反射镜之间，所述合光镜装设于所述激光照明设备与所述方棒组件之间。
  12. 如权利要求11所述的投影系统，其特征在于：所述合光镜包括AR镀膜和高反膜，所述AR镀膜镶嵌于于所述高反膜内。
  13. 如权利要求11所述的投影系统，其特征在于：所述投影系统获取的图像信号中亮度最高像素点的亮度为A，每一像素点的亮度为a，所述激光光源能够输出的最大亮度为Imax，所述激光光源对每一像 素点的输出亮度Ia按照
    Figure PCTCN2017095445-appb-100002
    的算法输出激光，以实现所述投影系统高动态范围的投影成像。
  14. 如权利要求13所述的投影系统，其特征在于：所述投影系统获取的图像信号中通过算法获得亮度最高像素点的灰度值为A，所述激光光源能够输出的最大亮度记为Imax，所述LCD调制器的最大灰度等级为IM；如果某一像素点的灰度值为a，则该像素点对应的所述激光光源的亮度Ia按照公式
    Figure PCTCN2017095445-appb-100003
    计算得到，该像素点对应的所述LCD调制器的亮度Ib按照公式
    Figure PCTCN2017095445-appb-100004
    计算得到。
  15. 如权利要求14所述的投影系统，其特征在于：所述LCD调制器为8位灰阶，所述LCD调制器的最大灰度等级IM为255。
  16. 如权利要求14所述的投影系统，其特征在于：所述激光光源、光调制组件及LCD调制器均有一定的灰阶，所述投影系统能够实现的灰阶为所述激光光源、光调制组件及LCD调制器灰阶的乘积。
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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3855219B1 (en) * 2020-01-21 2024-09-18 Focuslight Technologies Inc. Diffuser device
JP7700148B2 (ja) * 2020-11-13 2025-06-30 パナソニックホールディングス株式会社 光源装置および投写型画像表示装置
CN113900328A (zh) * 2021-11-03 2022-01-07 福州大学 基于空间光调制器件的穿透散射介质远距投影装置及方法
JP7801667B2 (ja) * 2022-03-30 2026-01-19 日亜化学工業株式会社 光源装置及び表示装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102455513A (zh) * 2010-10-15 2012-05-16 前鼎光电股份有限公司 具有光线回收结构的投影装置
CN102455581A (zh) * 2010-10-15 2012-05-16 前鼎光电股份有限公司 具有均匀照明光学系统的投影装置
CN102929087A (zh) * 2012-10-31 2013-02-13 北京航空航天大学 一种用于微型照明的高效混合光源
CN103905759A (zh) * 2012-12-27 2014-07-02 株式会社理光 图像投影设备与其控制方法
CN104749863A (zh) * 2013-12-26 2015-07-01 精工爱普生株式会社 图像显示装置以及图像显示装置的控制方法
CN105467733A (zh) * 2014-08-25 2016-04-06 深圳市绎立锐光科技开发有限公司 投影显示系统及其控制方法
CN105589288A (zh) * 2016-02-29 2016-05-18 青岛海信电器股份有限公司 激光投影光源控制方法及装置
CN106125479A (zh) * 2016-08-08 2016-11-16 常州创微电子机械科技有限公司 多激光扫描投影系统

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4733944A (en) * 1986-01-24 1988-03-29 Xmr, Inc. Optical beam integration system
US8061854B2 (en) * 2003-11-01 2011-11-22 Silicon Quest Kabushiki-Kaisha Projection display system with varying light source
JP4524265B2 (ja) * 2005-03-30 2010-08-11 三星電子株式会社 照明ユニット及びそれを採用した画像投射装置
WO2009032341A1 (en) * 2007-09-06 2009-03-12 Olympus Corporation Projection display system with varying light source
CN101393382A (zh) * 2007-09-18 2009-03-25 中强光电股份有限公司 投影显示装置及其光源模块
WO2009110081A1 (ja) * 2008-03-06 2009-09-11 Ｎｅｃディスプレイソリューションズ株式会社 投光光学系、及びこれを用いた投写型表示装置
CN102221768B (zh) * 2010-04-15 2012-09-19 鸿富锦精密工业（深圳）有限公司 投影机对比度增强系统及其增强方法
CN202306115U (zh) * 2011-10-31 2012-07-04 上海显恒光电科技股份有限公司 基于层流电子束激发的激光crt投影系统
JP6424828B2 (ja) * 2013-10-17 2018-11-21 ソニー株式会社 光源装置、及び画像表示装置
WO2015129720A1 (ja) * 2014-02-28 2015-09-03 コニカミノルタ株式会社 色分解合成プリズムおよびそれを用いた光学系、プロジェクタ
JP6413498B2 (ja) * 2014-08-29 2018-10-31 セイコーエプソン株式会社 照明装置およびプロジェクター
CN105991980B (zh) * 2015-02-06 2019-05-03 深圳光峰科技股份有限公司 投影系统及其控制方法
CN104796650A (zh) * 2015-03-09 2015-07-22 康佳集团股份有限公司 节能lpd激光投影电视系统及其控制方法
US10057553B2 (en) * 2015-06-19 2018-08-21 Seiko Epson Corporation Light source device, illumination device, and projector
JP6691369B2 (ja) * 2015-10-21 2020-04-28 株式会社日立エルジーデータストレージ レーザ投射表示装置およびレーザ光源の駆動方法
CN105573033B (zh) * 2015-12-21 2017-06-23 中国科学院长春光学精密机械与物理研究所 投影光学系统
CN105573036B (zh) * 2016-01-11 2018-03-23 四川长虹电器股份有限公司 一种激光光源dlp显示系统及显示控制方法
CN105575304B (zh) * 2016-03-07 2018-06-12 青岛海信电器股份有限公司 激光投影画面亮度调节方法及装置
CN206095585U (zh) * 2016-09-20 2017-04-12 深圳市光峰光电技术有限公司 光检测系统及光检测装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102455513A (zh) * 2010-10-15 2012-05-16 前鼎光电股份有限公司 具有光线回收结构的投影装置
CN102455581A (zh) * 2010-10-15 2012-05-16 前鼎光电股份有限公司 具有均匀照明光学系统的投影装置
CN102929087A (zh) * 2012-10-31 2013-02-13 北京航空航天大学 一种用于微型照明的高效混合光源
CN103905759A (zh) * 2012-12-27 2014-07-02 株式会社理光 图像投影设备与其控制方法
CN104749863A (zh) * 2013-12-26 2015-07-01 精工爱普生株式会社 图像显示装置以及图像显示装置的控制方法
CN105467733A (zh) * 2014-08-25 2016-04-06 深圳市绎立锐光科技开发有限公司 投影显示系统及其控制方法
CN105589288A (zh) * 2016-02-29 2016-05-18 青岛海信电器股份有限公司 激光投影光源控制方法及装置
CN106125479A (zh) * 2016-08-08 2016-11-16 常州创微电子机械科技有限公司 多激光扫描投影系统

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