WO2015004724A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2015004724A1
WO2015004724A1 PCT/JP2013/068705 JP2013068705W WO2015004724A1 WO 2015004724 A1 WO2015004724 A1 WO 2015004724A1 JP 2013068705 W JP2013068705 W JP 2013068705W WO 2015004724 A1 WO2015004724 A1 WO 2015004724A1
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WO
WIPO (PCT)
Prior art keywords
light
projection
screen
scattered
intensity
Prior art date
Application number
PCT/JP2013/068705
Other languages
English (en)
Japanese (ja)
Inventor
樋口　隆信
Original Assignee
パイオニア株式会社
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Filing date
Publication date
Application filed by パイオニア株式会社 filed Critical パイオニア株式会社
Priority to PCT/JP2013/068705 priority Critical patent/WO2015004724A1/fr
Publication of WO2015004724A1 publication Critical patent/WO2015004724A1/fr

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Classifications

    • 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]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback
    • 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
    • G03B21/2086—Security or safety means in lamp houses
    • 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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/04—Colour photography, other than mere exposure or projection of a colour film by four or more separation records
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/06—Colour photography, other than mere exposure or projection of a colour film by additive-colour projection apparatus
    • 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
    • H04N9/3155—Modulator illumination systems for controlling the light source

Definitions

  • the present invention relates to a display device that displays video.
  • a display device that displays an image by projecting a projection image from a light source such as a projector onto a screen is known.
  • Patent Document 1 uses a light control element that can change a transparent state (transmission state) and an opaque state (scattering state) alternately by controlling the transmittance as a screen.
  • a viewer is photographed with a camera installed behind the screen in a transparent state, and an image is displayed as a display in an opaque state.
  • the light from the light source may enter the viewer's eyes when it is in a transparent state. If the screen is in a transparent state when no voltage is applied, the light from the light source may enter the viewer's eyes when the screen is powered off due to a failure or the like.
  • These are highly dangerous when a laser beam is used as a light source, and more dangerous when a large-screen system is configured using a raster scan type laser projector because the energy density of the laser beam is high. . Therefore, measures for avoiding such danger are indispensable.
  • Patent Document 2 describes that a conductive film is formed on a screen, a screen breakage is detected by a change in the resistance value of the conductive film, and the amount of light projected is controlled.
  • Patent Document 3 a photodetector is installed at the diagonally outer edge of the screen to detect whether the laser beam is scanned on the screen, and when the photodetector does not detect the laser beam within a predetermined time, a laser is detected. It is described that the generation of light is stopped.
  • Patent Document 3 has a problem that the difference between the transparent state and the opaque state of the screen cannot be detected because the light amount irradiated on the screen is measured by the photodetector. That is, Patent Documents 2 and 3 cannot be applied to the configuration described in Patent Document 1 because the configuration described in Patent Document 1 is not assumed.
  • the present invention allows strong light from a light source to pass through the screen and enter the viewer's eyes when, for example, a screen in which a transmission state and a scattering state change alternately is used. It is an object of the present invention to provide a display device that can prevent the above-described problem.
  • the invention according to claim 1 is a screen that can switch between a transmission state and a scattering state with respect to light, and projection light detection that detects the intensity of projection light projected toward the screen.
  • a screen capable of switching between a transmission state and a scattering state with respect to light, invisible light projection means for projecting invisible light in a predetermined wavelength range toward the screen, and the screen is scattered. Further, the invisible light detecting means for detecting the intensity of the invisible light in the predetermined wavelength range, and the projection of the projection light projected on the screen is limited based on the intensity of the invisible light detected by the invisible light detecting means. And limiting means.
  • the invention described in claim 7 is a screen that can be switched between a transmission state and a scattering state with respect to light, a projection light detection unit that detects the intensity of projection light projected toward the screen, and is scattered by the screen.
  • the scattered light detection means for detecting the intensity of a predetermined wavelength range included in the projection light, the intensity of the projection light detected by the projection light detection means, and the scattered light detection means detected
  • attenuating means for attenuating the projection light based on the intensity of the scattered light in a predetermined wavelength range.
  • a screen capable of switching between a transmission state and a scattering state with respect to light, invisible light projection means for projecting invisible light in a predetermined wavelength range toward the screen, and the screen is scattered.
  • Invisible light detection means for detecting the intensity of invisible light in the predetermined wavelength range
  • attenuation means for attenuating the projection light projected on the screen based on the intensity of the invisible light detected by the invisible light detection means It is characterized by having.
  • the detection result of the projection light detecting means for detecting the intensity of the projection light projected toward the screen capable of switching between the transmission state and the scattering state with respect to the light and the light scattered by the screen.
  • the invention according to claim 13 detects the intensity of invisible light in a predetermined wavelength range projected from the invisible light projection means toward the screen capable of switching between a transmission state and a scattering state with respect to light and scattered by the screen.
  • a determination step for determining whether or not to limit the projection of the projection light projected on the screen based on the detection result of the invisible light detection means, and the determination step determines that the projection of the projection light is limited In the case, a limiting step of limiting the projection of the projection light projected onto the screen by the limiting means is included.
  • the detection result of the projection light detecting means for detecting the intensity of the projection light projected toward the screen capable of switching between the transmission state and the scattering state with respect to the light and the light scattered by the screen.
  • the invention according to claim 15 detects the intensity of invisible light in a predetermined wavelength range projected from the invisible light projection means toward the screen capable of switching between a transmission state and a scattering state with respect to light and scattered by the screen. Determining whether to attenuate the projection light projected on the screen based on the detection result of the invisible light detection means, and if it is determined in the determination step that the projection light is attenuated, attenuation And attenuating step for attenuating the projection light projected on the screen.
  • FIG. 1 is a configuration diagram of a display device according to a first embodiment of the present invention.
  • FIG. 2 is a configuration diagram illustrating an example of a light source and an optical system of the projector illustrated in FIG. 1. It is sectional drawing of the screen shown by FIG. It is the schematic block diagram which showed the example of a division
  • movement of the calculator shown by FIG. 4 is another configuration example of the display device shown in FIG. 1. It is a block diagram of the display apparatus concerning the 2nd Example of this invention.
  • FIG. 9 is a configuration diagram illustrating an example of a light source and an optical system of the projector illustrated in FIG. 8.
  • FIG.1 It is a block diagram of the display apparatus concerning the 3rd Example of this invention. It is another example of a structure of the scattered light detector shown by FIG.1, FIG8 and FIG.10. 11 is another configuration example of the projection photodetector shown in FIGS. 1, 8, and 10.
  • a display device includes a screen capable of switching between a transmission state and a scattering state with respect to light, a projection light detection unit that detects the intensity of projection light projected toward the screen, and is scattered by the screen.
  • a scattered light detecting means for detecting the intensity of a predetermined wavelength range included in the projected light out of the scattered light. Then, the limiting unit limits the projection of the projection light based on the intensity of the projection light detected by the projection light detection unit and the intensity of the scattered light in the predetermined wavelength range detected by the scattered light detection unit.
  • the scattered light detection means detects the intensity in the predetermined wavelength range, the influence of the environmental light contained in the scattered light can be removed. Since the spectrum of the ambient light is known to be broad, the influence of the ambient light can be ignored by detecting a predetermined wavelength range included in the projection light. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • the predetermined wavelength range detected by the scattered light detection means may be a wavelength range corresponding to one or a plurality of light sources among a plurality of light sources that emit light constituting the projection light. By doing in this way, it is possible to detect whether or not the projection light is projected on the screen from the wavelength of light (for example, red blue green) constituting the projection light. Moreover, since the wavelength range of a specific light source is detected, the influence of ambient light can be removed.
  • the projection light detection means may detect the intensity of light in the same wavelength range as that of the scattered light detection means. By doing so, the intensity changes of the scattered light can be matched, so that it can be detected with higher accuracy whether or not the projection light is projected on the screen.
  • a display device includes a screen capable of switching between a transmission state and a scattering state for light, invisible light projection means for projecting invisible light in a predetermined wavelength range toward the screen, Invisible light detecting means for detecting the intensity of invisible light in the predetermined wavelength range scattered by the screen. Then, the limiting unit limits the projection of the projection light projected on the screen based on the intensity of the invisible light detected by the invisible light detection unit. By doing in this way, it can be detected whether projection light is projected on the screen of a scattering state by the presence or absence of scattering of invisible light. And when invisible light is not projected on the screen of a scattering state, projection of projection light can be restrict
  • the invisible light detecting means detects the intensity of invisible light in a predetermined wavelength range projected from the invisible light projecting means, the influence of environmental light can be eliminated. Since the spectrum of ambient light is known to be broad, the influence of ambient light can be ignored by detecting a predetermined wavelength range of invisible light emitted from a predetermined light source. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • the limiting means may stop the projection of the projection light. By doing so, it is possible to prevent the projection light from hitting the screen, so that strong light from the light source does not hit the screen and can be prevented from entering the viewer's eyes.
  • the limiting means may block the projection light.
  • the projection light can be blocked by providing a shutter mechanism or the like in a projector or the like that projects the projection light. Therefore, strong light from the light source does not strike the screen and can be prevented from entering the viewer's eyes.
  • a display device includes a screen that can switch between a transmission state and a scattering state with respect to light, a projection light detection unit that detects the intensity of projection light projected toward the screen, Scattered light detecting means for detecting the intensity of a predetermined wavelength range included in the projected light out of the scattered light scattered by the screen.
  • the attenuation unit attenuates the projection light based on the intensity of the projection light detected by the projection light detection unit and the intensity of the scattered light in the predetermined wavelength range detected by the scattered light detection unit. By doing in this way, it can be detected whether projection light is projected on the screen of a scattering state by comparison with the predetermined wavelength contained in projection light and projection light. And when it is not projected on the screen of a scattering state, projection light can be attenuated to the extent which is not dangerous. Therefore, it is possible to prevent strong light from the light source from passing through the screen and entering the viewer's eyes.
  • the scattered light detection means detects the intensity in the predetermined wavelength range, the influence of the environmental light contained in the scattered light can be removed. Since the spectrum of the ambient light is known to be broad, the influence of the ambient light can be ignored by detecting a predetermined wavelength range included in the projection light. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • the predetermined wavelength range detected by the scattered light detection means may be a wavelength range corresponding to one or a plurality of light sources among a plurality of light sources that emit light constituting the projection light. By doing in this way, it is possible to detect whether or not the projection light is projected on the screen from the wavelength of light (for example, red blue green) constituting the projection light. Moreover, since the wavelength range of a specific light source is detected, the influence of ambient light can be removed.
  • the projection light detection means may detect the intensity of light in the same wavelength range as that of the scattered light detection means. By doing so, the intensity changes of the scattered light can be matched, so that it can be detected with higher accuracy whether or not the projection light is projected on the screen.
  • a display device includes a screen capable of switching between a transmission state and a scattering state for light, invisible light projection means for projecting invisible light in a predetermined wavelength range toward the screen, Invisible light detecting means for detecting the intensity of invisible light in the predetermined wavelength range scattered by the screen.
  • the attenuation means attenuates the projection light projected on the screen based on the intensity of the invisible light detected by the invisible light detection means. By doing in this way, it can be detected whether projection light is projected on the screen of a scattering state by the presence or absence of scattering of invisible light. And when invisible light is not projected on the screen of a scattering state, projection light can be attenuate
  • the invisible light detecting means detects the intensity of invisible light in a predetermined wavelength range projected from the invisible light projecting means, the influence of environmental light can be eliminated. Since the spectrum of ambient light is known to be broad, the influence of ambient light can be ignored by detecting a predetermined wavelength range of invisible light emitted from a predetermined light source. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • the attenuation means may be arranged so as to overlap the screen on at least one of the one surface or the other surface of the screen. By doing so, the projection light can be attenuated before or after the screen. Further, the screen and the attenuation means can be configured integrally.
  • the detection result of the projection light detection unit that detects the intensity of the projection light projected toward the screen capable of switching between the transmission state and the scattering state with respect to the light. And determining whether or not to limit the projection of the projection light based on the detection result of the scattered light detection means for detecting the intensity of the predetermined wavelength range included in the projection light among the scattered light scattered by the screen.
  • the determination step includes a limiting step of limiting the projection of the projection light by the limiting unit when it is determined that the projection of the projection light is limited in the determination step.
  • the scattered light detection means detects the intensity in a predetermined wavelength range, the influence of the environmental light contained in the scattered light can be removed. Since the spectrum of the ambient light is known to be broad, the influence of the ambient light can be ignored by detecting a predetermined wavelength range included in the projection light. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • a method for controlling a display device includes a predetermined wavelength that is projected from an invisible light projection unit toward a screen capable of switching between a transmission state and a scattering state with respect to light and is scattered by the screen. Based on the detection result of the invisible light detecting means for detecting the intensity of the invisible light in the range, a determination step for determining whether or not to limit the projection of the projection light projected on the screen, and the projection light projection in the determination step If it is determined to be limited, a limiting step of limiting the projection of the projection light projected onto the screen by the limiting means is included. By doing in this way, it can be detected whether projection light is projected on the screen of a scattering state by the presence or absence of scattering of invisible light.
  • projection of projection light can be restrict
  • the spectrum of ambient light is known to be broad, the influence of ambient light can be ignored by detecting a predetermined wavelength range of invisible light emitted from a predetermined light source. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • the display device control method includes a projection light detection unit that detects the intensity of projection light projected toward a screen that can switch between a transmission state and a scattering state with respect to light. Judgment to determine whether or not to attenuate the projection light based on the result and the detection result of the scattered light detection means for detecting the intensity of the predetermined wavelength range included in the projection light among the scattered light scattered by the screen And a step of attenuating the projection light by the attenuating means when it is determined that the projection light is attenuated in the determination step.
  • the projection light detection means detects the intensity in a predetermined wavelength range, the influence of the environmental light contained in the scattered light can be removed. Since the spectrum of the ambient light is known to be broad, the influence of the ambient light can be ignored by detecting a predetermined wavelength range included in the projection light. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • a method for controlling a display device includes a predetermined wavelength that is projected from an invisible light projection unit toward a screen capable of switching between a transmission state and a scattering state with respect to light and is scattered by the screen. Based on the detection result of the invisible light detecting means for detecting the intensity of the invisible light in the range, it is determined whether to attenuate the projection light projected on the screen, and it is determined that the projection light is attenuated in the determination step. In such a case, an attenuation step of attenuating the projection light projected onto the screen by the attenuation means is included.
  • the invisible light detecting means detects the intensity of invisible light in a predetermined wavelength range projected from the invisible light projecting means, it is possible to remove the influence of environmental light. Since the spectrum of ambient light is known to be broad, the influence of ambient light can be ignored by detecting a predetermined wavelength range of invisible light emitted from a predetermined light source. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • the display system includes a projector 2, a screen 3, a driver 4, a calculator 5, a scattered light detector 6, and an ambient light removal filter 7.
  • the projector 2 as a light source projects image light for full display once within a part of the frame period of the image.
  • the projector 2 has laser diodes for each of the three primary colors of RGB (red, green, and blue), and laser light having an intensity modulated in accordance with a video signal input from the outside is emitted as projection light.
  • the projector 2 also has an optical system such as a collimating optical system and a beam shaping optical system, and a scanner (scanning element) that scans the laser light in the two-dimensional direction of the screen 3.
  • the laser beams of the three primary colors emitted from are output toward the screen 3 and displayed on the screen 3 as images.
  • the projector 2 is installed in the back of the screen 3 when viewed from the viewer.
  • FIG. 2 shows an example of the configuration of the light source and the optical system of the projector 2.
  • the projector 2 includes a laser control circuit 2a, a red laser light source 2b, a blue laser light source 2c, a green laser light source 2d, collimating lenses 2e, 2f and 2g, a lens 2k, a mirror 2j, and dichroic mirrors 2h and 2i.
  • the laser control circuit 2a outputs the video signals converted into the gradation data of the three colors red, blue, and green to the red laser light source 2b, the blue laser light source 2c, and the green laser light source 2d, respectively.
  • the red laser light source 2b, the blue laser light source 2c, and the green laser light source 2d output laser light of each color according to the gradation data input from the laser control circuit 2a.
  • the laser light output from the red laser light source 2b is collimated by the collimator lens 2e, and then passes through the dichroic mirror 2h and the lens 2k and enters the MEMS mirror 2l.
  • the laser light output from the blue laser light source 2c is collimated by the collimator lens 2f, reflected by the dichroic mirror 2i toward the dichroic mirror 2h, reflected by the dichroic mirror 2h toward the lens 2k, and the lens 2k. And enters the MEMS mirror 2l.
  • the laser light output from the green laser light source 2d is collimated by the collimator lens 2g, reflected by the mirror 2j toward the dichroic mirror 2i, then transmitted through the dichroic mirror 2i, and directed by the dichroic mirror 2h toward the lens 2k. And is transmitted through the lens 2k and enters the MEMS mirror 21.
  • the MEMS mirror 21 is a mirror (scanning element, spatial modulator) configured by MEMS (Micro Electro Mechanical Systems) that scans incident laser light in the horizontal and vertical directions of the screen 3, and is formed integrally with the mirror. It is driven by an actuator (not shown). The operation of the MEMS mirror 21 is controlled by the MEMS mirror control circuit 2m. The laser light incident on the MEMS mirror 21 is reflected toward the beam splitter 2n.
  • MEMS Micro Electro Mechanical Systems
  • the beam splitter 2n as the projection light detection means reflects a predetermined amount of the incident laser light toward the projection light selection filter 2p, and outputs the rest toward the screen 3, that is, projects as projection light.
  • the amount reflected by the beam splitter 2n toward the projection light selection filter 2p may be an amount that does not affect the display on the screen 3.
  • the projection light selection filter 2p as the projection light detection means is constituted by a narrow band-pass filter that selectively transmits green laser light among RGB three-wavelength laser light (projection light).
  • the green laser light has the same color (wavelength range) as the color (wavelength range) transmitted by the ambient light removal filter 7 described later. That is, the projection light detector 2o detects the intensity of light in the same wavelength range as the scattered light detection means by the projection light selection filter 2p.
  • Projection light detector 2o as projection light detection means is composed of a photodetector such as a photodiode, for example.
  • the projection light detector 2o outputs an electric signal corresponding to the intensity of the input projection light to the computing unit 5.
  • the projection light detector 2o, the beam splitter 2n, and the projection light selection filter 2p are not limited to being built in the projector 2, but may be any position where projection light can be detected, such as the vicinity of the exit of the projector 2 or the vicinity of the screen 3. Good.
  • the projection light may be directly received without providing the beam splitter 2n.
  • the screen 3 can switch the optical state between a transmission state and a scattering state (opaque state).
  • the screen 3a includes a transparent electrode 3a1 and a scattering layer 3a2 sandwiched between the transparent electrodes 3a1.
  • the outside of the transparent electrode 3a1 is a transparent substrate such as glass or resin.
  • the scattering layer 3a2 shown in FIG. 3 is composed of polymer dispersed liquid crystal (Polymer Dispersed Liquid Crystal, PDLC), polymer network liquid crystal (Polymer Network Liquid Crystal, PNLC), or the like.
  • a reverse mode light control panel that is in a scattering state when a voltage is applied to the transparent electrode 3a1 and is in a transmission state when no voltage is applied is used as the screen 3.
  • the screen 3 projects an image from the projector 2 in the scattering state, so that the projection light is scattered and the image is displayed on the screen 3.
  • FIG. 4 shows a schematic configuration diagram of the screen 3 shown in FIG. 1 viewed from the front. As shown in FIG. 4, the screen 3 is divided into a plurality of divided regions 31 in a band shape, and the transmission state and the scattering state can be switched for each divided region 31.
  • the region where the image is displayed is in a scattering state, and the region where the image is not displayed is in a transmissive state, so that these are averaged (integrated) to the human eye as a viewer.
  • the see-through characteristic that the screen 3 is transparent even when it is visually recognized and in a bright display state is obtained.
  • switching between the scattering state and the transmission state may be performed by, for example, outputting a control signal from the projector 2 or the calculator 5 to the screen 3 wirelessly or by wire.
  • the driver 4 is a circuit that outputs a power ON / OFF switching signal to the projector 2 in response to an instruction from the computing unit 5.
  • the computing unit 5 as a limiting means supplies a video signal to be projected to the projector 2 input from the outside. Note that the video signal may be directly input to the projector 2.
  • the computing unit 5 switches each divided region 31 of the screen 3 to the scattering state or the transmission state based on the synchronization signal of the input video signal.
  • the synchronization signal is received from the projector and each divided area 31 of the screen 3 is switched to the scattering state or the transmission state.
  • the arithmetic unit 5 projects the projection of the projection from the projector 2 and the scattering state of the screen 3 or the screen 3 remains in a transmissive state. It is determined whether or not light is transmitted through the screen 3 without being scattered. If the projection light is transmitted through the screen 3 without being scattered, the power of the projector 2 is turned off. Note that the screen 3 actually scatters light slightly even in the transmissive state, but cannot scatter so that an image can be displayed and the amount of attenuation of transmitted light is so small that it will not be scattered. .
  • the scattered light detector 6 as the scattered light detecting means is composed of a photodetector such as a photodiode.
  • the scattered light detector 6 outputs an electric signal corresponding to the intensity of the wavelength (for example, the green laser light source 2 d) transmitted from the scattered light scattered by the screen 3 through the ambient light removal filter 7 to the calculator 5. Therefore, the scattered light detector 6 is installed at a position where the scattered light scattered by the screen 3 is incident.
  • the installation position of the scattered light detector 6 and the ambient light removal filter 7 described later may be on the projector 2 side or on the viewer side.
  • the ambient light removal filter 7 is constituted by, for example, a narrow band-pass filter that selectively transmits green laser light among RGB three-wavelength laser light (projection light) projected by the projector 2. That is, only the wavelength range of the laser light emitted from the green laser light source 2d is transmitted. That is, the ambient light removal filter 7 also functions as part of the scattered light detection means.
  • the solid line is shown as green laser light
  • the one-dot chain line is shown as red laser light
  • the two-dot chain line is shown as blue laser light.
  • the spectrum of laser light (projection light) projected from the projector 2 is sharp (narrow band), whereas the spectrum of ambient light is broad (broadband). Therefore, by extracting only the peak portion of the spectrum of the laser beam by the ambient light removal filter 7, the intensity of the projection light from which the influence of the ambient light is removed can be obtained.
  • the screen 3, the beam splitter 2n, the projection light detector 2o, the projection light selection filter 2p, the scattered light detector 6, the computing unit 5, and the ambient light removal filter 7 are included.
  • the display apparatus 1 concerning one Example of this invention is comprised.
  • FIG. 5 is a schematic functional configuration diagram of the computing unit 5.
  • the intensity of the scattered light (the intensity of the green laser light transmitted through the projection light selection filter 2p) that is the output of the scattered light detector 6 and the projection light that is the output of the projection light detector 2o.
  • the intensity (the intensity of the green laser light transmitted through the ambient light removal filter 7) is compared by the comparison unit 5b.
  • the fact that the scattered light intensity from the screen 3 in the scattering state and the transmission state is different is used.
  • the display image generally changes with time except when the same image is continuously displayed with a constant luminance (still image display), and thus the projection light intensity and the scattered light intensity change with time. Therefore, by continuously monitoring the scattered light intensity and the projected light intensity and sequentially comparing the two, it is possible to detect unintended transmission of the laser light through the screen 3. For example, when the synchronization is lost due to a malfunction of the screen 3 or the like, the laser light is transmitted without being scattered because the place irradiated with the laser light is in a transmission state. At this time, a change occurs such that the intensity of the scattered light becomes small, and an offset occurs in the ratio between the intensity of the scattered light and the projected light. Therefore, by detecting this offset, it can be detected that the laser light is transmitted through the screen 3.
  • Examples of specific comparison methods in the comparison unit 5b include subtracting the intensity of the scattered light from the intensity of the projected light, and dividing the intensity of the projected light by the intensity of the scattered light. As described above, if a change occurs such that the laser beam is transmitted without being scattered due to malfunction of the screen 3 and the intensity of the scattered light is reduced, for example, in the case of subtraction, the subtraction value is increased. Change. Therefore, loss of synchronization can be detected. If the subtraction value changes more than a certain value, the projector 2 is turned off to stop projection of the projection light as an abnormal state in which the projection light is projected in the transmission state such as out of synchronization.
  • step S1 the display device 1 is activated and initialized, and the process proceeds to step S2. That is, power is supplied to the display device 1 and each unit is set to an initial state.
  • step S2 projection is started and the process proceeds to step S3. That is, the projection light is projected from the projector 2 and displayed on the screen 3.
  • the screen 3 sequentially switches the divided areas 31 shown in FIG. 4 to the scattering state in synchronization with the projection light.
  • step S3 as the determination step, it is determined whether or not a failure has occurred. If it has occurred (in the case of yes), the process proceeds to step S4, and if it does not occur (in the case of no), this step is repeated. That is, it is determined whether or not to limit the projection of the projection light.
  • the problem is that an abnormal state in which projection light is projected in the transmission state occurs due to the above-described loss of synchronization or the supply of the electrode of the screen 3 being stopped. That is, it is a case where it is detected that the subtraction value has changed more than a certain value as a result of the comparison by the comparison unit 5b.
  • step S4 as the limiting step, the projection light is blocked and the process proceeds to step S5.
  • the projection light is blocked by turning off the power of the projector 2. That is, projection of projection light is limited by outputting a control signal for turning off the power of the projector 2.
  • a control signal that stops power supply to the projector 2 may be output to a power supply device that supplies power to the projector 2.
  • step S5 the projection is stopped. That is, the input of the video signal to the projector 2 is stopped.
  • FIG. 4 since it is divided into a plurality of divided regions 31, a scattered light detector 6 and an ambient light removal filter 7 are provided for each divided region, and the projector 2
  • the flowchart of FIG. 6 may be executed using the result of the scattered light detector 6 that is in a scattering state in accordance with the scanning of the projection light.
  • the number of scattered light detectors 6 and the ambient light removal filter 7 may be one.
  • the divided region 31 closest to the position where the one scattered light detector 6 and the ambient light removal filter 7 are provided is scattered. What is necessary is just to compare the intensity
  • the scattered light detector 6 and the ambient light removal filter 7 are provided at the lower end of the screen, the output of the scattered light detector 6 when the divided region 31 at the lower end is in a scattering state, and the region is scanned.
  • the outputs of the projection light detector 2o when compared are compared. In this case, the comparison is performed once in a scanning cycle (video cycle) (a period during which the image is projected onto the divided area 31).
  • the display device 1 includes a screen 3 that can switch between a transmission state and a scattering state with respect to light, a projection light detector 2o that detects the intensity of projection light projected toward the screen 3, and A scattered light detector 6 for detecting the intensity of light in the wavelength range that has passed through the ambient light removal filter 7 out of the scattered light scattered by the screen 3; Based on the intensity of the projection light detected by the projection light detector 2o and the intensity of light in the wavelength range transmitted through the ambient light removal filter 7 detected by the scattered light detector 6, the computing unit 5 The projection of the projection light is stopped by turning OFF. By doing so, it is possible to detect whether or not the projection light is projected onto the screen 3 in the scattering state.
  • the projector 2 When the projection light is not projected onto the screen 3 in the scattering state, the projector 2 is turned off. For example, it is possible to prevent the projection light from hitting the screen 3. Therefore, strong light from the light source can be prevented from passing through the screen 3 and entering the viewer's eyes.
  • the scattered light detector 6 detects the intensity in a predetermined wavelength range that has passed through the ambient light removal filter 7, the influence of the ambient light contained in the scattered light can be removed. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • the projection light selection filter 2p detects the intensity of light in the same wavelength range as that of the ambient light removal filter 7, the intensity change of the scattered light can be matched, and the projection light is projected onto the screen 3. It can be detected with higher accuracy.
  • stopping the projection of the projection light is not limited to turning off the power of the projector 2.
  • the emission of the red laser light source 2b, the blue laser light source 2c, and the green laser light source 2d may be stopped, or the input of the video signal to the projector 2 is stopped (step S4 is omitted and step S5 is omitted). May be performed).
  • a shutter mechanism 9 may be provided on the front surface of the projector 2 as shown in FIG.
  • the shutter mechanism 9 is controlled from the calculator 5 via the driver 8. That is, the shutter mechanism 9 is controlled to be closed instead of turning off the power of the projector 2 in step S4 of FIG. That is, the projection of the projection light is blocked.
  • the shutter mechanism 9 is not limited to the front surface of the projector 2 and may be provided inside the projector 2. As shown in FIG. 7, the provision of the shutter mechanism 9 eliminates the need to turn off (turn off) the projector 2. Therefore, when returning, it is only necessary to open the shutter mechanism 9 and it is possible to return quickly.
  • the wavelength range of the laser light to be compared by the computing unit is not limited to green, but may be red or blue, or two or all three of these three colors.
  • a beam splitter may be used to divide the light into two or three and provide a filter that transmits the wavelength range of each color.
  • the predetermined wavelength range detected by the scattered light detection means may be a wavelength range corresponding to one or a plurality of light sources among a plurality of light sources that emit light constituting the projection light.
  • the light source constituting the projection light is not limited to the laser light, but may be an LED (light emitting diode) light source.
  • the spectrum peak is not as sharp as the laser light, so the influence of ambient light cannot be completely removed. There is a possibility that the detection accuracy of the state is lowered. Therefore, a light source having a sharp spectrum such as laser light is preferable.
  • the projection light selection filter 2p in the projector 2 may not be provided.
  • three color laser beams are directly incident on the projection light detector 2o from the beam splitter 2n.
  • the temporal change in the intensity of the projected light is often substantially the same regardless of whether it is red, blue, or green.
  • the projection light selection filter 2p may not be provided in the previous stage of the projection light detector 2o.
  • infrared (invisible light) laser light in a predetermined wavelength range is projected onto the screen 3 as invisible light projection means.
  • the solid line indicates RGB laser light
  • the alternate long and short dash line indicates infrared laser light.
  • infrared light infrared light
  • Invisible light may not be laser light.
  • laser light is generally preferable because it has a sharp peak in the spectrum and can easily eliminate the influence of ambient light.
  • FIG. 9 shows a configuration diagram of the projector 2 according to the present embodiment.
  • an infrared laser light source 2q a collimating lens 2r, and a mirror 2s are added, and the mirror 2j is changed to a dichroic mirror 2t.
  • the beam splitter 2n, the projection light detector 2o, and the projection light selection filter 2p are deleted from the configuration of FIG.
  • an eye-safe laser (wavelength 1.4 to 2.6 ⁇ m) is preferably used as the laser light emitted from the infrared laser light source 2q.
  • the laser light output from the infrared laser light source 2q under the control of the laser control circuit 2a is collimated by the collimator lens 2r, reflected by the mirror 2s toward the dichroic mirror 2t, and then transmitted through the dichroic mirrors 2t and 2i. Then, the light is reflected by the dichroic mirror 2h toward the lens 2k, passes through the lens 2k, and enters the MEMS mirror 2l.
  • the laser light output from the green laser light source 2d is collimated by the collimating lens 2g, then reflected by the dichroic mirror 2t toward the dichroic mirror 2i, dropped by the dichroic mirror 2i, and applied to the lens 2k by the dichroic mirror 2h. The light is then reflected and transmitted through the lens 2k to enter the MEMS mirror 21.
  • the ambient light removal filter 7 of the present embodiment is a narrow band pass filter that transmits the same wavelength range as the infrared light emitted from the infrared laser light source 2q.
  • the scattered light detector 6 outputs an electric signal corresponding to the intensity of the wavelength of the infrared light transmitted from the scattered light scattered by the screen 3 through the ambient light removal filter 7 to the calculator 5. That is, it functions as invisible light detection means. Then, in the computing unit 5, when the detected infrared light intensity is below a certain level, an abnormal state in which the projection light is projected in the transmission state occurs due to loss of synchronization or the supply of the electrode of the screen 3 being stopped. Judge that Then, for example, the power supply of the projector 2 is turned off, or projection of an image or the like is stopped.
  • the infrared light projected from the projector 2 is emitted with a predetermined constant output.
  • the scattered light detector 6 has an infrared ray with an intensity corresponding to the output of the infrared laser light source 2q. Light should be detected. Therefore, the presence / absence of a failure in step S3 in FIG. 6 can be determined by determining whether the output of the scattered light detector 6 is equal to or less than a certain intensity.
  • the display device 1 removes ambient light from the screen 3 that can switch between a transmission state and a scattering state with respect to light, and the scattered light that is projected from the infrared laser light source 2q and scattered by the screen 3. And a scattered light detector 6 for detecting the intensity of infrared light transmitted through the filter 7. Then, the computing unit 5 stops the projection of the projection light by turning off the power of the projector 2 based on the intensity of the infrared light detected by the scattered light detector 6.
  • the projected light is scattered even when an image that is biased to a predetermined wavelength range such as a blue-colored image is displayed (when the projected light is projected). Whether or not the image is projected on the screen in the state can be detected. Further, since the intensity of infrared light in the wavelength range emitted from the infrared laser light source 2q is detected, the influence of ambient light can be removed.
  • the infrared light is projected with a constant output.
  • the infrared light is output with a pulsed light having a predetermined frequency
  • the scattered light detector 6 is provided with a lock-in amplifier. You may make it detect. In this case, since the frequency coincidence is also seen on the detection side, the output on the light source side can be lowered.
  • the infrared light emitted from the infrared laser light source 2q is scanned together with the projection light and projected toward the screen 3 (although it is projected together), it is provided alone. Then, it may be projected toward the screen 3.
  • a control signal for switching the screen 3 to the scattering state or the transmission state is input from the computing unit 5 or the like so as to project it to a specific position on the screen 3, and a period in which an image should be projected on the specific position on the screen 3 It is only necessary to control so as to emit infrared light.
  • the emission of the red laser light source 2b, the blue laser light source 2c, the green laser light source 2d, and the infrared laser light source 2q may be stopped, or the input of the video signal to the projector 2 may be performed. You may make it stop.
  • a shutter mechanism 9 may be provided on the front surface of the projector 2 as shown in FIG.
  • the light source for forming the projection light is a laser light source, but may be an LED (light emitting diode) light source.
  • the spatial modulator is not a MEMS mirror 21 but a two-dimensional spatial modulation element such as a liquid crystal element or DMD (Digital Micromirror Device).
  • the display device 1 includes a projector 2, a screen 3, a calculator 5, a scattered light detector 6, an ambient light removal filter 7, a driver 10, and a normal device.
  • a mode light control panel 11 The mode light control panel 11.
  • the normal mode light control panel 11 attenuates the laser light to prevent the light from being transmitted to the viewer. That is, it has attenuation means for attenuating the projection light.
  • the normal mode light control panel 11 is composed of a liquid crystal element in a normal mode in which a scattering layer sandwiched between transparent electrodes is composed of liquid crystal, and is in a transmission state when a voltage is applied to the transparent electrode and is in a scattering state when no voltage is applied. It is a thing.
  • the normal mode dimming panel 11 is controlled from the computing unit 5 via the driver 10.
  • the normal mode light control panel 11 is normally controlled by applying a voltage so as to be in a transmissive state. If a problem occurs in step S3 in the flowchart of FIG. 6, the steps S4 and S5 described in the first embodiment are replaced. A step of stopping the application of the voltage to enter a scattering state is performed (attenuation step). By doing so, the laser light transmitted through the screen 3 in an abnormal state can be scattered by the normal mode light control panel 11 to attenuate the output of the laser light.
  • the normal mode dimming panel 11 is arranged so as to overlap the viewer 3 side of the screen 3, that is, one side of the screen 3, but may be arranged on the projector 2 side (the other side). Good.
  • the normal mode light control panel 11 is used as the attenuation means, but a reverse mode light control panel may be used.
  • a voltage is not applied and a transmission state is set.
  • voltage application is started and a scattering state is set.
  • the reverse mode light control panel is in a scattering state when a voltage is applied, for example, when the power supply of the screen 3 and the normal mode light control panel 11 is stopped due to a failure or the like, the reverse mode light control panel is in a scattering state. I can't. Therefore, in the case of the configuration as in the present embodiment, the normal mode light control panel 11 is preferable as the attenuating means.
  • the configurations of the scattered light detector and the arithmetic unit 5 are the same as those shown in the first embodiment. That is, for example, the projection light intensity of the green laser light is detected by the projection light detector 2o provided in the projector, and the intensity of the green laser light scattered by the screen 3 is detected by the scattered light detector 6. Based on the result detected by the projection light detector 2 o and the result detected by the scattered light detector 6, it is determined whether or not the projection light is transmitted without being scattered by the screen 3.
  • the configuration of the scattered light detector and the arithmetic unit 5 may be the configuration shown in the second embodiment. That is, invisible light such as infrared light is projected from the projector 2, and the intensity of the infrared light scattered by the screen 3 is detected by the scattered light detector 6. Then, based on the intensity of the infrared light detected by the scattered light detector 6, it is determined whether or not the projection light is transmitted through the screen 3 without being scattered.
  • the display device 1 includes a screen 3 that can switch between a transmission state and a scattering state with respect to light, a projection light detector 2o that detects the intensity of projection light projected toward the screen 3, and A scattered light detector 6 that detects the intensity of light in a wavelength range that has passed through the ambient light removal filter 7 out of the scattered light scattered by the screen 3.
  • the normal mode light control panel 11 attenuates the projection light based on the intensity of the projection light detected by the projection light detector 2o and the intensity of the scattered light detected by the scattered light detector 6. By doing so, it is possible to detect whether or not the projection light is projected onto the screen 3 in the scattering state.
  • the projection light When the projection light is not projected onto the screen 3 in the scattering state, the projection light is reduced to a level where there is no danger. Can be attenuated. Therefore, strong light from the light source can be prevented from passing through the screen 3 and entering the viewer's eyes.
  • the scattered light detector 6 detects the intensity in a predetermined wavelength range that has passed through the ambient light removal filter 7, the influence of the ambient light contained in the scattered light can be removed. Therefore, it is possible to detect whether or not the projection light is projected onto the screen in the scattering state with higher accuracy.
  • the normal mode light control panel 11 is arranged so as to overlap the screen 3 on either the viewer side or the projector 2 side of the screen 3, the projection light is attenuated before or after the screen 3. can do. Further, the screen 3 and the attenuation means can be configured integrally.
  • the scattered light detector 6 and the ambient light removal filter 7 are positioned where the scattered light on the screen 3 can be detected as shown in FIG. 1, for example (the light from the scattered light detector 6 is incident). However, it may be configured as shown in FIG. 11.
  • the scattered light detector 6 shown in FIG. 11 is provided on the viewer side so as to overlap the screen 3 with respect to the screen 3, and detects the laser light scattered by the screen 3.
  • the scattered light detector 6 includes a light detection layer 6a formed of, for example, a transparent film-like acrylic, and a light detector 6d.
  • a waveguide layer 6b and a cladding layer 6c are formed.
  • the waveguide layer 6b guides a part of the light scattered by the screen 3 in a direction parallel to the projection surface (screen surface) of the screen 3 and guides it to the end surface of the waveguide layer 6b.
  • the clad layer 6c has a lower refractive index than the waveguide layer 6b, and makes it easier to guide light incident on the waveguide layer 6b to the end face. Note that the clad layer 6c may not be provided if only the waveguide layer 6b can guide light for detection by the photodetector 6d.
  • the photodetector 6d is provided on the end surface of the photodetector layer 6a.
  • the light detection layer 6 a is provided on one side surface (end surface) corresponding to a plurality of regions (divided regions 31) of the screen 3.
  • the photodetector 6d is configured by, for example, a photodiode, and converts the intensity of light detected by the photodetector layer 6a into an electrical signal and outputs the electrical signal to the computing unit 5.
  • the photodetection layer 6a is provided at a right angle to the photodetection layer 6a so that the light guided to the waveguide layer 6b can be taken in.
  • the photodetector 6d is provided with the ambient light removal filter described in the above-described embodiment, or is provided in the previous stage. By configuring in this way, the scattered light is detected by the photodetector 6d through the light detection layer 6a.
  • the light detection layer 6a shown in FIG. 11 is provided on the projector 2 side of the screen 3, it can function as a projection light detector (FIG. 12). In this case, the projection light projected from the projector 2 is detected by the photodetector 6d through the light detection layer 6a.
  • the screen 3 is divided into a plurality of divided areas 31.
  • the screen 3 may not be divided.
  • the projection may be performed at a predetermined time within a frame period of the video.
  • the present invention is not limited to the above embodiment. That is, those skilled in the art can implement various modifications in accordance with conventionally known knowledge without departing from the scope of the present invention. As long as the configuration of the display device and the control method of the display device of the present invention is provided even by such modification, it is of course included in the scope of the present invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Computer Security & Cryptography (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)

Abstract

La présente invention porte sur un dispositif d'affichage au moyen duquel il est possible, quand un élément modulateur qui bascule alternativement entre un état de passage direct et un état de diffusion est utilisé à titre d'écran, d'empêcher une lumière intense provenant d'une source de lumière de passer à travers l'écran et d'atteindre les yeux d'un spectateur. Un dispositif d'affichage (1) comprend : un écran (3) qui peut basculer entre un état de passage direct et un état de diffusion relativement à de la lumière ; un détecteur de lumière projetée (2o) qui détecte l'intensité de la lumière projetée qui est projetée vers l'écran (3) ; et un détecteur de lumière diffusée (6) qui détecte, parmi de la lumière diffusée qui est diffusée par l'écran (3), l'intensité de la lumière d'une région de longueur d'onde qui passe à travers un filtre d'élimination de lumière ambiante (7). Un ordinateur (5) interrompt la projection de la lumière projetée par mise hors tension d'une source d'alimentation d'un projecteur (2) sur la base de l'intensité de la lumière projetée que détecte le détecteur de lumière projetée (2o) et de l'intensité de la lumière de la région de longueur d'onde qui passe à travers le filtre d'élimination de lumière ambiante (7) que détecte le détecteur de lumière diffusée (6).
PCT/JP2013/068705 2013-07-09 2013-07-09 Dispositif d'affichage WO2015004724A1 (fr)

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WO2016158174A1 (fr) * 2015-03-31 2016-10-06 浜松ホトニクス株式会社 Dispositif d'affichage par projection
WO2016158176A1 (fr) * 2015-03-31 2016-10-06 浜松ホトニクス株式会社 Dispositif d'affichage par projection
EP3985433A1 (fr) * 2020-10-16 2022-04-20 Barco N.V. Dispositif de source de lumière et dispositif de projection d'image comprenant un dispositif de source lumineuse

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JP2005164692A (ja) * 2003-11-28 2005-06-23 Sony Corp ディスプレイ装置及び調光装置
JP2007082107A (ja) * 2005-09-16 2007-03-29 Nippon Telegr & Teleph Corp <Ntt> 映像提示・撮像装置
JP2011170096A (ja) * 2010-02-18 2011-09-01 Mitsubishi Electric Corp 画像投影装置および画像表示装置

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JP2005164692A (ja) * 2003-11-28 2005-06-23 Sony Corp ディスプレイ装置及び調光装置
JP2007082107A (ja) * 2005-09-16 2007-03-29 Nippon Telegr & Teleph Corp <Ntt> 映像提示・撮像装置
JP2011170096A (ja) * 2010-02-18 2011-09-01 Mitsubishi Electric Corp 画像投影装置および画像表示装置

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Publication number Priority date Publication date Assignee Title
WO2016158174A1 (fr) * 2015-03-31 2016-10-06 浜松ホトニクス株式会社 Dispositif d'affichage par projection
WO2016158176A1 (fr) * 2015-03-31 2016-10-06 浜松ホトニクス株式会社 Dispositif d'affichage par projection
JPWO2016158174A1 (ja) * 2015-03-31 2017-09-28 浜松ホトニクス株式会社 投影表示装置
CN107430271A (zh) * 2015-03-31 2017-12-01 浜松光子学株式会社 投影显示装置
CN107430280A (zh) * 2015-03-31 2017-12-01 浜松光子学株式会社 投影显示装置
JP2018112751A (ja) * 2015-03-31 2018-07-19 浜松ホトニクス株式会社 投影表示装置
JP2018159931A (ja) * 2015-03-31 2018-10-11 浜松ホトニクス株式会社 投影表示装置
EP3279715A4 (fr) * 2015-03-31 2018-10-31 Hamamatsu Photonics K.K. Dispositif d'affichage par projection
EP3279716A4 (fr) * 2015-03-31 2018-11-07 Hamamatsu Photonics K.K. Dispositif d'affichage par projection
US10197895B2 (en) 2015-03-31 2019-02-05 Hamamatsu Photonics K.K. Projection display device
TWI681208B (zh) * 2015-03-31 2020-01-01 日商濱松赫德尼古斯股份有限公司 投影顯示裝置
CN107430280B (zh) * 2015-03-31 2020-01-31 浜松光子学株式会社 投影显示装置
TWI689773B (zh) * 2015-03-31 2020-04-01 日商濱松赫德尼古斯股份有限公司 投影顯示裝置
US10928716B2 (en) 2015-03-31 2021-02-23 Hamamatsu Photonics K.K. Projection display device
EP3985433A1 (fr) * 2020-10-16 2022-04-20 Barco N.V. Dispositif de source de lumière et dispositif de projection d'image comprenant un dispositif de source lumineuse
WO2022079232A1 (fr) * 2020-10-16 2022-04-21 Barco N.V. Dispositif de source de lumière et dispositif de projection d'image comportant un dispositif de source de lumière

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