WO2000075724A1 - Plaque pare-lumiere pour appareil video de projection - Google Patents

Plaque pare-lumiere pour appareil video de projection Download PDF

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Publication number
WO2000075724A1
WO2000075724A1 PCT/JP2000/002978 JP0002978W WO0075724A1 WO 2000075724 A1 WO2000075724 A1 WO 2000075724A1 JP 0002978 W JP0002978 W JP 0002978W WO 0075724 A1 WO0075724 A1 WO 0075724A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
projection
image
video
screen
Prior art date
Application number
PCT/JP2000/002978
Other languages
English (en)
Japanese (ja)
Inventor
Masahisa Hamada
Shohei Nakamura
Original Assignee
Kripton Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kripton Co., Ltd. filed Critical Kripton Co., Ltd.
Publication of WO2000075724A1 publication Critical patent/WO2000075724A1/fr

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/13—Projectors for producing special effects at the edges of picture, e.g. blurring
    • 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
    • G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
    • G03B37/04—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe with cameras or projectors providing touching or overlapping fields of view
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • 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
    • H04N9/3147—Multi-projection systems

Definitions

  • the present invention relates to a light shielding plate of a projection type video device, and more particularly to a light shielding plate of a projection type video device such as a video video projector in continuous multi-screen.
  • video display devices have evolved from television devices that can be viewed by a small number of people at home, and have evolved into large-scale, multi-projection video devices, such as movie displays for airplanes.
  • Such video projectors include large-sized CRT CRTs with high-brightness light emission, liquid crystal transmissive projectors, liquid crystal reflective projectors such as ILA, and DLPs (reflective projectors with fine mirrors).
  • Various projection devices have been developed.
  • a projection type video device in a continuous multi-screen that is, a video video projector will be described with a liquid crystal reflection type projection device such as a conventional ILA as a representative.
  • Fig. 7 shows the basic configuration of a video image projector.
  • a video (video) signal from a video playback device (VTR, etc.) 1 is sent to the video generation laminate 2 via the pixel control unit 8 to generate video (optical) light.
  • Image light composed of each color light is incident on the polarization beam splitter 3.
  • High-brightness white light is simultaneously incident on the polarizing beam splitter 3 from the light source lamp 4 from the 90 ° direction beside it.
  • the light source lamp 4 is a highly directional xenon lamp or the like, and the emitted white light waves are synchronized coherent waves (coherent).
  • This white light is combined with the image light composed of each color light by the polarization beam splitter 3 to become image light composed of each color light with extremely high brightness (high-brightness image light) and is incident on the projection lens (double-sided convex lens) 5.
  • the projection lens 5 refracts the luminance image light, and projects the image light L enlarged in proportion to the distance to a distant white screen 6.
  • the light from the light source lamp 4 is used to intensify the image light from the image-generating laminate 2 with the polarizing beam splitter 3 using the strong light from the light source lamp 4, so that the image on the white screen 6 has high brightness and is clearly visible. ing.
  • the focusing of the image on the white screen 6 is performed by moving the projection lens 5 together with the lens holder 10 in the optical axis direction as shown by the arrow.
  • the pixel control unit 8 does not emit light from all pixels, and Only the 600 X horizontal 800 pixels emit light.
  • the brightness on the white screen 6 is set to the maximum white light. Is assumed to be luminance 1.0, and the area without projection light (dark area) is assumed to be 0.0.
  • the fact that the light of the light source lamp 4 causes a diffraction phenomenon will be described.
  • the video signal reproduced by the video reproducing device 1 is also a white video.
  • a projection lens 5 is mounted on a box of a video image project by a lens holder 10, and the lens holder 10 is screwed into this box (not shown). By screwing or returning the lens holder 110, the projection lens 5 moves in parallel in the optical axis direction, and the focus of the image on the white screen 6 can be adjusted.
  • a light blocking plate 11 is arranged on the outer end face of the lens holder 10 in parallel with the projection lens 5 and the white screen 6.
  • the light blocking plate 11 is constituted by a substantially perfect black plate, and completely blocks the lower (right) end, which is a part of the image light L projected from the projection lens 5.
  • the light passing through the tip P of the light blocking plate 11 passes through the optical path 14 and forms an image on the white screen 6. Since the light is originally blocked below the optical path 14, it is desirable that the brightness be zero. However, since the image light L is combined with the light from the light source lamp 4, a diffraction phenomenon occurs, and the light behind the P is generated. Wrap around.
  • a luminance graph is shown further to the right of FIG. 8, where the luminous intensity is high and constant at a portion where the light blocking plate 11 is not interposed, and the light path 12 on the lower side (right) outside the light path 14 is light. Luminance irregularities appear on the white screen 6 (projection surface) projected by the road 13.
  • the two fringe images 17 and 18 have been described. However, in practice, a plurality of bright and dark fringes whose luminance sequentially decreases from one light source lamp 4 to the optical paths 12 and 13 are generated.
  • CGs that were processed using a combination video system for more realism were projected using a video image projector, as well as a flat screen, as well as a multi-projection system such as a cylindrical screen, a parabolic screen, and a spherical screen.
  • a video image projector as well as a flat screen
  • a multi-projection system such as a cylindrical screen, a parabolic screen, and a spherical screen.
  • This boundary line is of course annoying, and methods to eliminate this boundary line are actually being implemented.
  • the screens overlap each other (overlapping), and the brightness of the overlapping projection is doubled.
  • the brightness of the border between the screens is adjusted by adjusting the brightness
  • the projection method by the blending is roughly classified into the following two methods.
  • the above-mentioned optical processing method combines the adjacent images over the entire image by shadowing the defocus part (the part close to the lens) of the light beam (light flux) emitted from the lens surface of the image projection device with an enemy shield.
  • optical-type rendering method it is possible to adjust the range from “black” to “white” to block the light beam.
  • the CRT method uses CRT white light emission and can be controlled by signal processing from “black signal” to “white signal”.
  • the following describes the conventional optical blending method in which two video image projects are used on a flat screen for simplicity.
  • One (upper) video image projector 55 projects the left landscape in the horizontal direction
  • the other (lower) video image projector 60 projects the right landscape.
  • the video signal input to each video image projector 55, 60 is the same as the left video of the right video image projector 60 in the left video image projector 55.
  • a significant portion of the left end contains the same portion as the right end image of the left video image projector 55.
  • the image light L-1 and L-2 from both video image projectors 55, 60 are projected on the T portion on the screen 16. Therefore, when considering white light, the brightness of this T region is 2D, which is twice as large as that of the overlapping portion, where D is the brightness of the non-overlapping portion.
  • the left and right images will be natural images, and the brightness can be expected to be normal.
  • the following methods are used to make the dazzling luminance 2D of the T portion the same as that of the non-overlapping portion without causing a stripe pattern.
  • the light-blocking plate 11 in FIG. 9 is removed (it will be described without omitting it in the drawing), and a blending device 30 is provided between the video reproduction device 1 and the pixel control unit 8, and the left and right videos are provided.
  • the brightness of the output of the overlapping video section by the video projector 55, 60 is adjusted so that the brightness of the T section is the same and a continuous continuous natural screen appears.
  • the high-precision blending device 30 shown in FIG. 9 is very expensive because electronic control is complicated and precision is required.
  • An object of the present invention is to provide a low-cost, simple and easy method for eliminating a stripe pattern generated by multi-screen projection.
  • the present invention has been made to solve the above-described problems, and each image is projected on a plurality of screens using a plurality of projection-type image devices, and a wide image is created by connecting the ends of each image to each other.
  • a light shielding plate disposed in front of a projection lens of an image generation unit provided in the projection-type imaging device, for shielding an end of the projection light and adjusting the brightness of the connection unit, The light shielding plate was composed of a filter whose transmittance gradually decreased from the central part to the peripheral part of the projected light.
  • the present invention is configured such that the transmittance of the filter gradually decreases gradually.
  • the present invention is configured such that the transmittance of the filter is gradually reduced continuously.
  • the shape of the fill is adjusted to the shape of the curved screen so that the ends of the images can be continuously joined.
  • FIG. 1 is a diagram showing an overall configuration in which two projection type image devices are provided with a density gradient light shielding plate according to the present invention, respectively.
  • FIG. 2 is a concentration gradient light shielding plate according to an embodiment of the present invention.
  • FIG. 3 is a diagram for explaining the optical function of the concentration gradient light shielding plate according to the embodiment of the present invention, and
  • FIG. 4 is another embodiment of the present invention having a different concentration gradient.
  • FIG. 5 is a diagram illustrating a concentration gradient light shielding plate according to an embodiment of the present invention.
  • FIG. 5 is a diagram for explaining an effect when the concentration gradient light shielding plate according to the embodiment of the present invention is used.
  • FIG. FIG. 7 is a view showing the structure of a concentration gradient shielding plate according to another embodiment of the present invention,
  • FIG. 7 is a view for explaining projection of an image on a screen by a general projection type video apparatus, and
  • FIG. Figure 9 explains the optical function of the plate. It is a figure which shows the
  • FIG. 1 shows an overall configuration in which a transmission type density gradient shielding plate of the present invention is attached to two projection type video devices (video video projectors).
  • the projection type video devices 55, 60 are placed on the screen 16 composed of a plurality of screens, and are installed so that adjacent comrades overlap each other.
  • Projection type imaging devices 55, 60 Each of the lens holders 10 and the defocus line between the lens 5 and the screen 16 on the defocus line physically fills these optical paths. Are provided.
  • the fill-shaped shielding plate is the concentration gradient shielding plate 21 of the present invention.
  • FIG. 2 is a view of the lens holder 10 and the concentration gradient blocking plate 21 as viewed from the direction of arrow A in the figure, and the right view of FIG. 2 is an enlarged view of a circle in the left view.
  • the density gradient blocking plate 21 is constituted by a plurality of filters each having a predetermined width in which light transmittance changes stepwise from an opaque region to a transmissive region, which are sequentially adjacent to each other.
  • the structure is such that the width of the transmission band filter can be set and changed arbitrarily.
  • the concentration gradient cutoff plate 21 is a kind of neutral wavelength filter, and has a white light transmittance stepwise from, for example, the vicinity of the optical axis, and a transmission density (D) of 0.15 to 0.30, 1. 2. Finally, it is a gray-scale filter that changes to an opaque plate and changes gradually from white to gray and then to black.
  • a band filter 50 of D 0.15
  • a band filter 51 of D 0.30
  • a band filter 52 of D l.2
  • an opaque wide band filter 53 are formed by connecting the ends to each other. ing.
  • the widths of the band filters 50, 51, and 52 are substantially the same, and the length (width) is experimentally determined according to the distance between the video image projector 1 and the white screen 6.
  • the first video image projector 55 When a white light is projected, a large rectangular white image is projected on the screen 16.
  • this density gradient cutoff plate 21 is set at the lower (right) end of the lens holder 110 of the video image projector 55, the light projected from the lower (right) end is
  • the band filter 53 blocks all light.
  • the brightness on the screen 16 is white with a brightness of 1.0 inside the window, and then the brightness of White, luminance in the part of light transmitted through the band filter 51
  • the white part of 0.70 and the light transmitted through the band-pass filter 52 gradually decreases in luminance to white of 0.01 luminance, and finally becomes a part without light.
  • the luminous intensity on this screen 16 (in the figure, the number of diagonal lines decreases as the brightness increases and the number of diagonal lines decreases, and the number of diagonal lines increases as the brightness decreases) is measured on the line R toward the end. As shown in the figure, there is a step-like line graph (curve) descending to the right.
  • a video image project equipped with these two density gradient cutoff plates 21 and 22 The brightness of the projected images from the evening 55 and 60 overlapped as shown by the dotted line on the right side of Fig. 1. In the part, one is down-sloping to the right and the other is down-sloping to the left, so the sum of these luminances is exactly 1.0, and the luminance of the connection is the same white as the luminance 1.0 inside both windows. .
  • a boundary between a plurality of screens can be formed into a continuous screen image without continuous seams.
  • the concentration gradient cut-off plate 21 can be used as the concentration gradient cut-off plate 22 composed of a continuous gray scale.
  • the density gradient blocking plate 23 As shown in FIG. 4, in the density gradient blocking plate 23, a density graph for reference is shown above, and the transmission density in the width direction from 0.10 (approximately) to 0.30, etc., from the left end to the right end The concentration has been continuously changed to 1.9 mag.
  • the height (length) of the density gradient blocking plate 23 is slightly larger than the diameter of the lens holder 10, and the width is set slightly wider in the gradient direction of the density than the overlap of each image generating laminate 2.
  • the structure of the concentration gradient blocking plate 23 is a filter in which the light transmittance changes continuously from a transmission region to a non-transmission region, and the width of the region can be set arbitrarily.
  • a boundary between multiple screens can be converted into a continuous screen image without continuous seams.
  • the screen is further screen-lifted in the upper (lower) direction of the screen 16, and a third video image projector is added in the upper (lower) direction of the video image projector 55 (60).
  • Density gradient blocking plates 21 (22, 23) will be attached to both sides of the lens holder 110 of the video image project 55 sandwiched between them.
  • the concentration gradient blocking plate 21 and the concentration gradient blocking plate 22 have been described as blending the flat screen 16, but the screen may be vertical or inclined.
  • the screen can be used with any curved surface such as a cylinder, sphere, paraboloid, or hyperboloid. Constitute.
  • the concentration gradient blocking plate 24 is formed in a crescent shape as shown in FIG. 6, and an arc-shaped neutral filter having a constant curvature is connected.
  • the filter is manufactured such that the transmission density (D) of each filter changes from 0.15 to 0.30, 1.2, and finally to an opaque plate from the side closer to the optical axis.
  • the combined image area T of the screen and the screen has a density filter corresponding to the emission luminance curve (a) of the video projector.
  • the structure of the concentration gradient cut-off plate can be made to suit the individual case, such as vertical blending in the vertical direction, horizontal blending in the horizontal direction, and slanting or curved blending. Therefore, it is possible to perform the rendering according to the shape of the projection screen such as flat, dome, hemisphere, and circle.
  • a split projection method using multiple screens is adopted.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

Des images sont projetées sur des écrans (16) par des appareils vidéo de projection (55, 60) et les bords des images sont reliés entre eux, de sorte qu'une image large soit formée. Une plaque pare-lumière perfectionnée (11) pour le réglage de la luminance au niveau de la partie reliée (T), par le blocage de la partie marginale du faisceau lumineux projeté, est placée en regard de la lentille de projection d'une unité de production vidéo prévue dans chacun des appareils vidéo de projection (55, 60). La plaque pare-lumière est un filtre dont la transmittance décroît graduellement du centre du faisceau lumineux projeté jusqu'à sa périphérie, ce qui permet l'obtention d'une plaque pare-lumière (21, 22, 23, 24) à gradient de densité.
PCT/JP2000/002978 1999-06-09 2000-05-10 Plaque pare-lumiere pour appareil video de projection WO2000075724A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11162944A JP2000352763A (ja) 1999-06-09 1999-06-09 投写型映像装置の光遮蔽板
JP11/162944 1999-06-09

Publications (1)

Publication Number Publication Date
WO2000075724A1 true WO2000075724A1 (fr) 2000-12-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/002978 WO2000075724A1 (fr) 1999-06-09 2000-05-10 Plaque pare-lumiere pour appareil video de projection

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JP (1) JP2000352763A (fr)
WO (1) WO2000075724A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006003409A (ja) * 2004-06-15 2006-01-05 Olympus Corp 画像投影システム
JP5939718B2 (ja) * 2014-07-20 2016-06-22 公益財団法人日本科学技術振興財団 映像投影システム及び映像投影方法
JPWO2020137174A1 (ja) * 2018-12-28 2021-11-18 株式会社Ｊｖｃケンウッド プロジェクタシステム
KR102136511B1 (ko) * 2020-04-09 2020-07-22 주식회사 한국미디어테크 모의훈련용 영상 혼합 방법
KR102310108B1 (ko) * 2021-04-14 2021-10-08 주식회사 한국미디어테크 영상 혼합을 위한 필터 제어 방법

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5063921A (fr) * 1973-10-08 1975-05-30
JPH0354540A (ja) * 1989-07-24 1991-03-08 Seiko Epson Corp マルチビジョン
JPH0413385A (ja) * 1990-04-30 1992-01-17 Shimadzu Corp 高精細度投影式ディスプレイ装置
JPH09138368A (ja) * 1995-11-14 1997-05-27 Chiyoda Corp 合成映像表示システム
EP0786687A1 (fr) * 1996-01-29 1997-07-30 Hughes-Jvc Technology Corporation Insertion d'image projetée des images multiples
JPH11288041A (ja) * 1998-03-03 1999-10-19 Kokubobu Zhongshan Kagaku Kenkyuin 複数のプロジェクターの組合せの映像継ぎ目消去方法と装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5063921A (fr) * 1973-10-08 1975-05-30
JPH0354540A (ja) * 1989-07-24 1991-03-08 Seiko Epson Corp マルチビジョン
JPH0413385A (ja) * 1990-04-30 1992-01-17 Shimadzu Corp 高精細度投影式ディスプレイ装置
JPH09138368A (ja) * 1995-11-14 1997-05-27 Chiyoda Corp 合成映像表示システム
EP0786687A1 (fr) * 1996-01-29 1997-07-30 Hughes-Jvc Technology Corporation Insertion d'image projetée des images multiples
JPH11288041A (ja) * 1998-03-03 1999-10-19 Kokubobu Zhongshan Kagaku Kenkyuin 複数のプロジェクターの組合せの映像継ぎ目消去方法と装置

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