WO2005093512A1 - Système d'affichage vidéo - Google Patents

Système d'affichage vidéo Download PDF

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Publication number
WO2005093512A1
WO2005093512A1 PCT/JP2005/005179 JP2005005179W WO2005093512A1 WO 2005093512 A1 WO2005093512 A1 WO 2005093512A1 JP 2005005179 W JP2005005179 W JP 2005005179W WO 2005093512 A1 WO2005093512 A1 WO 2005093512A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
image
display system
video
display surface
Prior art date
Application number
PCT/JP2005/005179
Other languages
English (en)
Japanese (ja)
Inventor
Takashi Kuwabara
Susumu Ibaraki
Hiroyuki Hamada
Kazumasa Nagashima
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2005093512A1 publication Critical patent/WO2005093512A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B60R11/0229—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for displays, e.g. cathodic tubes
    • B60R11/0235—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for displays, e.g. cathodic tubes of flat type, e.g. LCD
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R2011/0001—Arrangements for holding or mounting articles, not otherwise provided for characterised by position
    • B60R2011/0003—Arrangements for holding or mounting articles, not otherwise provided for characterised by position inside the vehicle
    • B60R2011/0028—Ceiling, e.g. roof rails
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
    • B60R2011/008—Adjustable or movable supports
    • B60R2011/0085—Adjustable or movable supports with adjustment by rotation in their operational position

Definitions

  • the present invention relates to a video display system for displaying a video.
  • an in-vehicle display system that is configured so that a polarization transmission direction of a rear view of a vehicle is substantially perpendicular to the vehicle and reduces a dazzling effect on a following vehicle due to display light emitted from a display screen.
  • Patent Document 1 JP-A-10-51764 (Page 2-3, Figure 1-2)
  • the present invention has been made to solve the conventional problems, and has as its object to provide a video display system capable of displaying a video that is easier for a user to view than in the past. Means for solving the problem
  • an image display system of the present invention includes an image display device having a display surface for displaying an image, and an image display device for polarizing image light, which is light constituting the image.
  • the member is disposed at a position between a predetermined position for showing the image to a user and the display surface, and the non-image light polarizing member is disposed at the predetermined position and the image light polarizing member. And a polarization direction different from that of the image light polarizing member.
  • the video light polarizing member suppresses non-video light such as illumination light or sunlight from reaching the display surface. It is possible to display a video which is easy to see.
  • the video display system of the present invention may be configured such that the video display device includes a projector that projects light on the display surface, and a screen on which the display surface is formed. .
  • the image display system of the present invention can display an image such as a CRT (Cathode-Ray Tube) or a PDP (Plasma Display Panel) by receiving non-image light such as illumination light or sunlight.
  • a video display device having a screen on which a display surface on which a video display state is likely to be deteriorated compared to the display surface of the device a video which is easy for a user to see can be displayed.
  • the image display system according to the present invention may further include the image display system including a first position between the predetermined position and the display surface, and a second position other than between the predetermined position and the display surface. It may have a configuration provided with a support device that movably supports the light polarizing member.
  • the video display system of the present invention can show the video to the user as necessary without the intervention of the video light polarizing member. Compared to a configuration that cannot be shown to the user, it is possible to display an image that is easy for the user to see when non-image light such as illumination light or sunlight hardly reaches the display surface.
  • the video display system of the present invention includes an illuminating device that illuminates the predetermined position.
  • the non-image light polarizing member may have a configuration in which illumination light of the illumination device is polarized as the non-image light.
  • the image display system of the present invention does not need to reduce the amount of illumination light of the illumination device when presenting the image displayed on the display surface to the user, and thus the image displayed on the display surface. Displaying images and images that are easier for the user to view while the illumination device illuminates a specified position compared to a configuration in which the amount of illumination light from the illumination device must be reduced when the Can be.
  • the image display device may have a configuration in which the image is displayed with light polarized in a direction substantially the same as the polarization direction of the image light polarizing member. ,.
  • the image display system of the present invention can suppress the amount of image light from being reduced by the image light polarizing member, and thus can display an image with light polarized in a direction different from the polarization direction of the image light polarizing member. Compared to the configuration in which the display device displays an image, it is possible to display an image that is easy for the user to see.
  • the video display device may be any one of red, green, and blue, and a first light that is a single color of light and is polarized;
  • the image is displayed with two colors of light other than the first light and polarized second light, and the polarization direction of the first light and the polarization direction of the second light are different from each other.
  • the image light polarizing member may have a configuration in which the angle formed by the polarization direction is substantially the same.
  • the video light polarizing member is arranged at a position where light projected by the projector is directed toward the display surface, and the projector is provided with the video light polarizing member. It may have a configuration in which light polarized in a direction substantially the same as the polarization direction is projected toward the display surface.
  • the image display system of the present invention can suppress the amount of light projected on the projector power screen from being reduced by the image light polarizing member. As compared with a configuration in which the projector projects the polarized light toward the display surface, it is possible to display an image that is easy for the user to see.
  • the video light polarizing member is disposed at a position where the light projected by the projector is incident on the display surface, and the projector is provided with red, green, and blue.
  • the first projection light which is light of any one of the colors and is polarized
  • the second projection light which is light of two colors other than the first projection light of red, green, and blue and is polarized.
  • the amount of red, green, and blue light projected from the projector onto the screen is reduced substantially uniformly by the video light polarizing member.
  • the amounts of red, green, and blue light are unevenly reduced by the image light polarizing member, an image that is easy for the user to see can be displayed.
  • the video display system of the present invention may have a configuration mounted on a moving object.
  • the video light polarizing member suppresses the light from the outside of the moving body from reaching the display surface, so that the light from the outside of the moving body enters the inside of the moving body. Even if the amount and direction of the emitted light changes due to the movement of the moving object, it is possible to display an image that is easy for the user to see.
  • a moving object of the present invention has a configuration including any of the above-described video display systems.
  • the image light polarizing member suppresses external light from reaching the display surface, the light amount and direction of light incident from the outside to the inside can be reduced. Even if it changes due to the movement of the image, it is possible to display an image that is easier for the user to see than before.
  • the present invention can provide an image display system that can display an image that is easier for a user to view than in the past.
  • FIG. 1 is a top view for explaining the principle of a video display system according to a first embodiment of the present invention.
  • FIG. 2 is a partially cutaway perspective view of an automobile equipped with the video display system shown in FIG. 1.
  • FIG. 3 (a) is a partially cut-away side view of the automobile shown in FIG. 2 when a polarizing film is used.
  • FIG. 3 (b) is a partially cut-away side view of the automobile shown in FIG. 2 when a polarizing film is stored.
  • FIG. 4 is a partially cut-away side view of an automobile equipped with the video display system according to the first embodiment of the present invention, which is different from the example shown in FIG.
  • FIG. 5 is a top view of an image display system according to the first embodiment of the present invention, which is different from the example shown in FIG. 1.
  • FIG. 6 is a side sectional view of a room in which a video display system according to a second embodiment of the present invention is installed.
  • video display system 10 is installed in automobile 60 as a moving object. Further, the video display system 10 includes a video display device 20 having a screen 21 on which a display surface 21a for displaying video is formed, and a projector 22 for projecting light onto the display surface 21a of the screen 21, and a light passing therethrough. A polarizing film 31 and a polarizing film 32 that polarize the light; a roll 41 that is installed substantially at the center of the ceiling inside the automobile 60 and can be wound around the screen 21 to be stored; As shown in FIGS. 3 (a) and 3 (b), a rotation support section 42 is provided as a support device for rotatably supporting the polarizing film 31.
  • the screen 21 is a reflection type screen that maintains the polarization direction of light, that is, a silver screen.
  • the projector 22 divides the light of the light source into three colors of red, green and blue by a dichroic mirror, and the light passing through the liquid crystal panel for each color is projected on the display surface 21 a of the screen 21 to form an image.
  • the liquid crystal panels for red, green, and blue have substantially the same polarization direction.
  • the projector 22 is installed behind the ceiling inside the automobile 60.
  • the polarizing film 31 is set so as to have a polarization direction substantially the same as the polarization direction of the liquid crystal panel for each color of red, green and blue of the projector 22 in the state shown in FIG. 3A. ing.
  • the polarizing film 31 polarizes image light, which is light constituting an image displayed on the display surface 21a of the screen 21, and forms an image light polarizing member.
  • the polarizing film 31 is seated on a predetermined position for showing the image displayed on the display surface 21a of the screen 21 to the user 61, that is, on the rear seat of the automobile 60. It is arranged between the position of the eyes of the user 61 and the display surface 21a of the screen 21.
  • the polarizing finolem 32 is attached to the window glass on the side of the automobile 60 so that the polarizing direction is substantially orthogonal to the polarizing film 31 in the state shown in FIG. 3A. That is, the polarizing finolem 32 is arranged at a position other than between the position of the eyes of the user 61 sitting on the rear seat of the car 60 and the polarizing film 31 in the state shown in FIG. .
  • the polarizing film 32 is light other than image light, and is non-image light incident on the polarizing film 31 toward the display surface 21a of the screen 21, for example, the inside of the automobile 60 through the window glass from the outside of the automobile 60.
  • the light, such as the light from the sun 62, incident on the portion is polarized, and constitutes a non-image light polarizing member.
  • the polarizing film 31 When light enters the interior of the automobile 60 through the window glass from the outside of the automobile 60, the polarizing film 31 is brought into a state shown in FIG.
  • the light is reflected by the screen 21 while maintaining the polarization direction.
  • the projection light of the projector 22 reflected by the screen 21 again passes through the polarizing film 31 whose polarization direction is substantially the same, and the user sitting on the rear seat of the automobile 60
  • the polarizing film 31 is brought into the state shown in FIG. Is done.
  • the projection light of the projector 22 reflected by the screen 21 does not pass through the polarizing film 31 and enters the eyes of the user 61 sitting on the rear seat of the automobile 60.
  • the polarizing film 31 suppresses the light outside the vehicle 60 from reaching the display surface 21a of the screen 21, the image display system 10 Even if the amount and direction of light incident on the inside of the vehicle is changed by the movement of the automobile 60, it is possible to display an image that is easier for the user 61 to see than before.
  • the image display system 10 also suppresses non-image light from reaching the display surface 21a of the screen 21.
  • Shina Power S et al. Show the outside view of the car 60 to the user 61 via the polarizing film 32.
  • the image display system 10 a display surface 21a in which the display state of an image is easily deteriorated by the arrival of non-image light compared to the display surface of an image display device such as a CRT or a PDP is formed. Even the image display device 20 having the screen 21 can display an image that is easy to see for the user 61.
  • the video display system 10 may include a video display device such as a CRT or PDP instead of the video display device 20.
  • the video display system 10 includes a first position shown in FIG. 3A between a position of an eye of a user 61 sitting on a rear seat of the car 60 and a display surface 21a of the screen 21.
  • the polarizing film 31 is movably supported between the position of the eyes of the user 61 sitting in the rear seat of the car 60 and the second position shown in FIG. 3B except between the display surface 21a of the screen 21 and the second position.
  • the rotation support section 42 is provided, and the image can be shown to the user 61 without passing through the polarizing film 31, so that the image cannot be shown to the user 61 without passing through the polarizing film 31.
  • the image display system 10 moves the polarizing film 31 to the second position shown in FIG. 3 (b) when the non-image light is difficult to reach the display surface 21a of the screen 21 and the vehicle 60 The space inside can be secured.
  • the video display system 10 has a polarizing film 31 disposed at a position where light projected by the projector 22 is directed toward the display surface 21 a of the screen 21, and the polarization direction of the polarizing film 31 is substantially the same as that of the polarizing film 31.
  • the projector 22 projects the light polarized in the direction toward the display surface 21a of the screen 21 to prevent the amount of light projected from the projector 22 onto the screen 21 from being reduced by the polarizing film 31.
  • the projector 22 projects light polarized in a direction different from the polarization direction of the polarizing film 31 toward the display surface 21 a of the screen 21, it is possible to display an image that is easy for the user 61 to see.
  • the image display device 20 displays an image on the display surface 21a of the screen 21 with light polarized in substantially the same direction as the polarization direction of the polarizing film 31. Since the amount of light can be suppressed from being reduced by the polarizing film 31, Compared to the configuration in which the image display device 20 displays an image on the display surface 21a of the screen 21 with light polarized in a direction different from the polarization direction of the polarizing film 31, the ability to display an image that is easy for the user 61 to see S it can.
  • the screen 21 is desirably a silver screen, but may be a surface diffusion type screen. Further, the screen 21 can be housed by being wound around the roll 41, but may be housed by another method or may not be housed.
  • the polarization directions of the liquid crystal panels for red, green, and blue are substantially the same, but the polarization directions of the liquid crystal panels for red, green, and blue are different from each other. They may be different from each other.
  • the image display system 10 is provided with the projector 22 and the polarizing film 31 so that the deviation of each color is minimized. Is desirable.
  • the image display system 10 it is desirable that the projector 22 and the polarizing film 31 be installed so that the polarization direction of the liquid crystal panel for each color and the polarization direction of the polarizing film 31 make an angle of about 45 °.
  • the image display system 10 includes a first projection light, which is a light of any one of red, green, and blue and is polarized, and a second projection light of red, green, and blue other than the first projection light.
  • the projector 22 projects the light and the polarized second projection light toward the display surface 21a of the screen 21, and the polarization direction of the first projection light and the polarization direction of the second projection light are different from each other.
  • the polarization direction of the light and the polarization direction of the second projection light make substantially the same angle with the polarization direction of the polarizing film 31, the amounts of red, green, and blue light projected from the projector 22 to the screen 21 are reduced.
  • the user can reduce the light intensity substantially uniformly by the polarizing film 31.
  • An easy-to-view image can be displayed on 61.
  • the image display system 10 includes a first light polarized in one of red, green, and blue and two colors other than the first light in red, green, and blue. And the second polarized light
  • the image display device 20 displays an image on the display surface 21a of the screen 21, and the polarization directions of the first light and the second light are different from each other, and the polarization directions of the first light and the second light are polarized.
  • the angle formed by the polarization direction of the film 31 is substantially the same, the amount of red, green, and blue image light is reduced almost uniformly by the polarizing film 31, so that the red, green, and blue images are reduced.
  • an image that is easy to see for the user 61 can be displayed.
  • the projector 22 may be a projector other than a power three-panel liquid crystal projector that is a three-panel liquid crystal projector.
  • the projector 22 may be a single-panel type liquid crystal projector or a DLP (Digital Light Processing) projector.
  • the installation angle of the polarizing film 31 is not limited by the polarization characteristics of the polarizing film 31.
  • the polarization finolem 31 preferably has a polarization direction substantially the same as the polarization direction of the liquid crystal panel for each color of red, green, and blue of the projector 22, but is different from the polarization direction of the liquid crystal panel. It may be in the direction.
  • the polarizing film 31 is housed by being rotated by the rotation support part 42 and is housed by being wound around the roll 41 together with the screen 21 by being attached to the front surface of the screen 21 and the like.
  • the storage may be performed by another method, or the storage may not be possible.
  • the polarizing film 32 is affixed to the window glass on the side of the automobile 60 in FIG. 2, but may be arranged at a position other than the side of the automobile 60.
  • the polarizing film 32 may be affixed to the window glass on the back of the car 60.
  • the polarizing film 32 may be attached to both the side window and the rear window of the automobile 60.
  • the polarizing film 32 may be lit for shellfish inside or outside the window glass, or may be provided separately from the window glass.
  • the image display system 10 includes a reflecting member 51 that reflects the light projected from the projector 22 and a reflecting member 51 installed on the rear side of the ceiling inside the automobile 60. And a rotation support portion 52 rotatably supported like a polarizing film 31 shown in FIG.
  • the projector 22 may be installed on the rear side to project light from the rear side of the screen 21.
  • the configuration of the video display system according to the second embodiment will be described. Note that among the configurations of the video display system according to the present embodiment, the same configuration as the configuration of the video display system according to the first embodiment is the same as the configuration of the video display system according to the first embodiment. The same reference numerals are given and the detailed description is omitted.
  • video display system 70 As shown in FIG. 6, video display system 70 according to the present embodiment is installed in room 90.
  • the video display system 70 includes a video display device 20 having a screen 21 and a projector 22 provided on a wall surface of a room 90 having a display surface 21 a formed thereon, and a polarization device attached to a front surface of the screen 21.
  • a polarizing film 32 for polarizing the illumination light.
  • the projection light of the projector 22 passes through the polarizing film 31 having substantially the same polarization direction, and is reflected by the screen 21 while maintaining the polarization direction.
  • the projection light of the projector 22 reflected by the screen 21 passes through the polarizing film 31 having substantially the same polarization direction again, and enters the eyes of the user inside the room 90.
  • the illuminating light of the illuminating device 80 passes through the polarizing film 32 and is polarized by the polarizing film 32 into only one direction component, and is polarized by the polarizing film 31 whose polarization direction is substantially orthogonal to the polarizing film 32. Shut off, screen 21 is not reached.
  • the image display system 70 turns off or turns off the illumination of the illumination device 80 when displaying the image displayed on the display surface 21a of the screen 21 to the user. Since there is no need to reduce the amount of illumination light of the screen 21, it is displayed on the display surface 21a of the screen 21. Compared to a configuration in which the amount of illumination light of the lighting device 80 must be reduced when the image to be shown is shown to the user, an image that is easy for the user to see while the interior of the room 90 is illuminated by the lighting device 80 Can be displayed.
  • the lighting device 80 is installed on the ceiling of the room 90, but may be installed in a place other than the ceiling.
  • the lighting device 80 may be installed on the wall of the room 90.
  • the image display system 70 includes a plurality of lighting devices 80, it is sufficient if the polarizing film 32 is attached to each surface of the plurality of lighting devices 80.
  • the polarizing film 32 may be stuck to the window, needless to say.
  • the video display system 70 is configured such that the projector 22 is installed on the back side of the screen 21 and the projector 22 projects light from the back side of the screen 21. It may be. Further, the image display system 70 is provided with a rotating support portion 42 for rotating the polarizing film 31 or a roll 41 for winding and storing the screen 21, and the polarizing film 31 is rotated by the rotating supporting portion 42. May be stowed, or may be stowed by other methods, such as being stuck on the front of the screen 21 and wound around the screen 21 together with the screen 21. Needless to say, it may be impossible to store.
  • the video display system according to the present invention has an effect of displaying a video that is easier for the user to view as compared with the related art, and is useful as an in-vehicle video display system or the like. .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Projection Apparatus (AREA)
  • Liquid Crystal (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

Un système d'affichage vidéo (10) composé d'un écran vidéo (20) ayant une surface d'affichage (21a) permettant d'afficher une image vidéo, un film de polarisation (31) pour polariser une lumière d'image vidéo constituant une image vidéo et un film de polarisation (32) pour polariser une lumière d'image non vidéo différente de la lumière d'image vidéo et imprégnant le film de polarisation (31) vers la surface d'affichage (21a). Le film de polarisation (31) est agencé dans une position située entre une position prédéterminée pour présenter une image vidéo à un utilisateur (61) et la surface d'affichage (21a), tandis que le film de polarisation (32) est agencé dans une position autre que toute position, entre la position prédéterminée pour afficher l'image vidéo à l'utilisateur (61) et le film de polarisation (31) et possède une direction de polarisation autre que celle du film de polarisation (31). Le système d'affichage vidéo (10) ainsi agencé peut afficher une image vidéo facile à présenter à l'utilisateur, en comparaison avec les systèmes conventionnels.
PCT/JP2005/005179 2004-03-26 2005-03-23 Système d'affichage vidéo WO2005093512A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004092157A JP2005275287A (ja) 2004-03-26 2004-03-26 映像表示システム
JP2004-092157 2004-03-26

Publications (1)

Publication Number Publication Date
WO2005093512A1 true WO2005093512A1 (fr) 2005-10-06

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WO (1) WO2005093512A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9547112B2 (en) 2013-02-06 2017-01-17 Steelcase Inc. Polarized enhanced confidentiality
US11106124B2 (en) 2018-02-27 2021-08-31 Steelcase Inc. Multiple-polarization cloaking for projected and writing surface view screens
US11221497B2 (en) 2017-06-05 2022-01-11 Steelcase Inc. Multiple-polarization cloaking

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007178582A (ja) * 2005-12-27 2007-07-12 Nishizawa Gakuen プロジェクター映像の表示方法および表示システム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6190148A (ja) * 1984-10-09 1986-05-08 Citizen Watch Co Ltd 投影型表示装置
JPS6364483A (ja) * 1986-09-05 1988-03-22 Kawasaki Heavy Ind Ltd 室内画像投影方法
JPH0389316A (ja) * 1989-09-01 1991-04-15 Canon Inc 投映型映像表示システム
JPH07503348A (ja) * 1992-01-31 1995-04-06 ベル　コミュニケーションズ　リサーチ　インコーポレーテッド ハイコントラスト前面映写ビデオディスプレイシステム
JPH10186548A (ja) * 1996-10-30 1998-07-14 Seiko Epson Corp 投写型表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6190148A (ja) * 1984-10-09 1986-05-08 Citizen Watch Co Ltd 投影型表示装置
JPS6364483A (ja) * 1986-09-05 1988-03-22 Kawasaki Heavy Ind Ltd 室内画像投影方法
JPH0389316A (ja) * 1989-09-01 1991-04-15 Canon Inc 投映型映像表示システム
JPH07503348A (ja) * 1992-01-31 1995-04-06 ベル　コミュニケーションズ　リサーチ　インコーポレーテッド ハイコントラスト前面映写ビデオディスプレイシステム
JPH10186548A (ja) * 1996-10-30 1998-07-14 Seiko Epson Corp 投写型表示装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9547112B2 (en) 2013-02-06 2017-01-17 Steelcase Inc. Polarized enhanced confidentiality
US9885876B2 (en) 2013-02-06 2018-02-06 Steelcase, Inc. Polarized enhanced confidentiality
US10061138B2 (en) 2013-02-06 2018-08-28 Steelcase Inc. Polarized enhanced confidentiality
US11221497B2 (en) 2017-06-05 2022-01-11 Steelcase Inc. Multiple-polarization cloaking
US11106124B2 (en) 2018-02-27 2021-08-31 Steelcase Inc. Multiple-polarization cloaking for projected and writing surface view screens
US11500280B2 (en) 2018-02-27 2022-11-15 Steelcase Inc. Multiple-polarization cloaking for projected and writing surface view screens

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