Connect public, paid and private patent data with Google Patents Public Datasets

Stereoscopic television receiving system

Download PDF

Info

Publication number
US2756363A
US2756363A US44067154A US2756363A US 2756363 A US2756363 A US 2756363A US 44067154 A US44067154 A US 44067154A US 2756363 A US2756363 A US 2756363A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
tube
area
eye
stereoscopic
image
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
Inventor
Wright Arthur
Original Assignee
Wright Arthur
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
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00Cathode ray tubes; Electron beam tubes
    • H01J31/08Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/26Image pick-up tubes having an input of visible light and electric output
    • H01J31/28Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
    • H01J31/30Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at anode potential, e.g. iconoscope

Description

y 24, 1956 A. WRIGHT STEREOSCOPIC TELEVISION R ECEIVING SYSTEM Filed July 1, 1954 INVENTOR United States Patent STEREOSCOPIC TELEVISION RECEIVING SYSTEM Arthur Wright, Forest Hills, N. Y.

Application July 1, 1954, Serial No. 440,671

18 Claims. (Cl. 315-1) My invention relates to a television system, including receivers, for producing and receiving television pictures and other graphic subjects stereoscopically and in accordance with which pictures may be viewed either in colors or in black and white, including, also, the method involved therein.

An object of my invention is to provide a system and apparatus for producing and receiving television pictures or any other graphic subjects stereoscopically, either in colors or in black and white. A further object is to reproduce multicolor or black and White images stereoscopically on a single receiver tube so that thereby the stereoscopic couple may be viewed by the respective eyes of any one of many simultaneous observers, and which may be accomplished without the interposition of selective devices such as scanning wheels, shutters and other moving parts. Further objects of my invention will be readily seen from the description of the same hereinafter in detail.

While my invention can be embodied in various different ways I have shown, for the purpose of illustration, only one form thereof in the accompanying drawings, in which:

Fig. 1 is a diagrammatic horizontal cross-section of a stereoscopic television receiver tube made in accordance with my invention;

Fig. 2 is a front elevation, enlarged, of the end of the tube; and

Fig. 3 is an enlarged cross-section of the same taken on line 33 of Fig. 2.

In the drawings, there is shown a television receiver tube 1 having an enlarged vacuum chamber 2 formed by a thickened front wall 3 which is approximately flat and of uniform thickness, as well as a thinner cylindrical side wall 4 connected to a narrow neck portion 5. The forward face of the tube 1, as shown in Fig. 2, is provided with a series of parallel cylindrical lenticles or gofferings 6 or alternatively similarly-positioned spaced black lines, it being understood that the said gofierings 6 or black lines are preferably located at an angle to the horizontal, for instance an angle of 45, or which may be horizontally or vertically arranged. These cylindrical lenticles may, for example, be made from 5 to per mm. It will be understood, similarly, that if the black lines are used instead, these lines will be located at similar distances or periodicities and that the said black lines may have any desired width, although, preferably, the Width or" each black line 6 may be equal to the width of each lighttransmitting interval. By means of the thickened front face 3, the tube is not only provided with adequate strength but this provides a uniform distance separating the series of lines or gofierings 6 from the inner face 7 of the tube having a ground glass surface 8. The neck portion 4 of. the tube ends in the usual insulating cylinder 9 carrying any desired electrical terminal or connections 10 for producing a scanning beam 11 in the usual manner, from an electron gun 12 operated by the usual deflecting coils 13, there being also provided on the inner wall of 2,756,363 Patented July 24, 1956.

the tube a metallic electron-collecting coating 14, in the usual manner. The electrical circuits of the tube may be of any usual design and construction, for instance as in my Patent No. 2,621,247, upon Stereoscopic Television, 01 as set forth in Fink, Principles of Television Engineering, 1949, particularly pages 16, 20, 341, 465 thereof; or Grob, Basic Television, 1949; or my Patent No. 2,683,834, upon Television Receivers; or Terman, Radio Engineering, 1947; all of which are published by the McGraw-Hill Book Co., New York, N. Y.

The color signal components forming the scanning beam 11 may be provided from any desired signal series produced in a television camera tube, by scanning with an electron beam a lenticulated photo-cathode plate, as for instance in my PatentNo. 2,621,247 aforesaid, or according to any similar system utilizing a lenticulated light-receiving plate for separating the light into the two stereoscopic images or elements forming a stereoscopic couple, in either black and white or color components by.

means of the gofierings of said plate. These golferings on the said plate, which may be spherical or cylindrical linear lenticulations, are located at any desired angle to the horizontal, for instance 45 or even horizontal or vertical, and make a stereoscopic separation forming the stereoscopic couple comprised of the two right and left-eye images, respectively, either in black and white or color.- In other Words, each of the images of the stereoscopic couple may be formed into and transmitted by electrical impulses corresponding to a color light separation of the multicolor image into any component colors, forv rear of the glass plate 16 and have a radius approximately. one third of the plate thickness. The lenticle width may be of any desired size. For instance, it may be of the same size as the lenticles in the camera tube, such for.

example as 5 to 30 per mm., or larger or even smaller. It will, of course, be understood that the movement and operation of the scanning beam 11 will be synchronized in time, distance and direction with the movements of the camera tube scanning beam. However, the two scanning beams may be or may not be paralIel to the direction of the linear lenticulations in the camera tube and receiver tube. If the images in the camera tube and receiver tube are the same size, the lenticulations on the plates in the camera tube and receiver tube may have the same actual size but if the two plates and their lenticles are of different size, the time and distance of movement of the scanning beam 11 will be changed in proportion, thereby producing larger or smaller images.

The synchronized light representing the stereoscopic couple in the two alternately placed images thus emitted by the phosphor 15 is transmitted to and through the lenticulations 17, each of said two imagesbeing divided into two, three or more portions corresponding to the two, three or more color components of the color'filter- The respective light components" of the camera tube. thus formed thereupon pass at their respective angles,

caused by the curvature of each lenticle, to an objective system 18, of any desired type, thence through a multi-- zone color filter 19, preferably. a S-banded filter, the zones of which are arranged parallel to the zones of the I like-color filter of the camera tube in the said Patent August 30, 1932.

thereupon focuses the images of the stereoscopic couple in their multicolor components, with the same respective arrangement in which they were received by the camera tube, onto the ground gIasssurfaceS, which acts as a view ing screen and which is viewed between the series of black lines 6 or by means of the lenticulations 6 on the front face of the picture tube 1. The observer, on account of theinterposition of these lines or lenticles 6 will see with his left eye only the left-eye images of the'stereoscopic couple in its 3-color components and will simultaneously see with his right eye only the right-eye images of the stereoscopic couple in its color components, owing to the fact'that the said lines or lenticles 6 will block the view of the right-eye'images by the left eye and prevent the left-eye images from being seen bythe right eye. It-will be understood, of course, that the "dimensions and positioning of the respective lines or lenticulations 6 will be such as to correspond to the dimensions and positioning of the lines of the respective two images of the stereo scopic couple received on the ground glass surface 8. Also, of course, the spectator may shift his position slightly laterally in one direction or the other to choose the best position of observation in which the two images of the stereoscopic couple will be most visible to the two eyes, respectively, on which they are intendedto be received. Also, especially if the gofferings of "the lenticulated plates in the camera tube and receiver tube and. the lines 6 are located at an angle to thehorizontal, this selected position of observation may be aided by a slight tilting of a head to one side or the other, inasmuch as the left-eye images of the stereoscopic couple are located on one side of each particular lenticle while the other eye images are located on the other side of each lenticle. While,;as above indicated, the lenticulations 6 and 17 may be of the same size, the lenticles 17 may be made somewhat or proportionately larger than the lentic1es17, especially as the image received on the ground glass surface 8 may be larger than the electron image on the sary, for the lenticles 6 to focus exactly on the ground glass surface 8. Furthermore, in case of lines 6being used'instead of lenticulations, the light obstructing lines 6 may benarrower than the light-transmitting intervals between them, asthe lines 6 are nearer to theeye than the lines of the stereoscopic couple on the ground glass phosphor 15. Also, it is desirable, but not wholly necessurface 8. Also, said lines 6 may be white or any other color and may even be made by merely etching or engraving themupon the outer surface of the front wall 3,

be made, for example, as set. forth in the patent to Kitroser, No. 1,941,696, granted January 2, 1934, or the patent to Oswald, No. 1,825,122, granted September 29, 19.31, or the patent to Oswald No. 1,874,621, granted In this way, at'the groundglass sur-' optical properties of the camera tube objectiveand color filter, in the preferred form of my. invention.

It will be understood, however, that if'the stereoscopic pictures are. produced and transmitted in black and white for reception by the receiver tube 1,-they. will be received and exhibited onlyin black and white on the ground" glass surface 8, Also, this could be donegifdesird, by

omission of the color filter 1 9 from the objective ning beams in the receiver tube are moved in the same synchronized direction as the camera tube and both scanning beams arepreferably moved parallel to and in registry with the respective lenticulations, the said two scanning beams, while moved in the same direction synchronously, may, if desired, be moved across or at an angle to the direction of the lenticulations in the camera tube and the receiver tube.

While I have described my invention above in detail I wish it to be understood that may changes may be made therein without departing from the spirit of the same.

I claim: I

1. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective within the tube, a'fluorescent area arranged to receive said beam, a lenticular surface in proximity to said areafor receiving light therefrom in the rear of said lenticles, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple and a viewing screen located at said'tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively.

2, In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective within" the tube, a fluorescent area arranged to receive said beam, a lenticular'surface in proximity to said area for receiving light therefrom in the rear of said lenticles, an image area so located with regard to said'objective as to exhibit at said tube a picture in two images of a stereoscopic couple and a viewing screen located on the body of said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively.

3. In a stereoscopic television cathode-ray beam resaid beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple incom ponents of difierent colors simultaneously on the'sa'me image area, and a viewing screen located at said'tube having elements thereon to. obstruct the view of the left and right eye images by the right eye and left eye respectively.

4. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as'to exhibit at said tube a' picture in two images of a stereoscopic couple in components of different colors simultaneously on the same 2 image area, and a viewing screen located on; the body of said tube having elements thereon toobstruct the view of the left and right eye images by the right eye and left eye respectively.

5. In a stereoscopic television cathode-ray beam receiver tube havingan optical-image forming objective ,Within the tube, afiuorescent area arranged to receive a stereoscopic couple and a viewing screen located at said tube having elements thereon toob'struct the view of the left and right eye images by the right eye and left eye respectively, said image area and lenticular surface being located, respectively, in two anti-principal planes of said objective.

6. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple and a viewing screen located on the body of said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively, said image area and lenticular surface being located, respectively, in two anti-principal planes of said objective.

7. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving lig'ht therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of 'a stereoscopic couple in components of different colors simultaneously on the same image area, and a viewing screen located at said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively, said image area and lenticular surface being located, respectively, in two anti-principal planes of said objective.

8. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple in components of different colors simultaneously on the same image area, and a viewing screen located on the body of said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively, said image area and lenticular surface being located, respectively, in two anti-principal planes of said objective.

9. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming collimated objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple and a viewing screen located at said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively.

10. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming collimated objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple and a viewing screen located on the body of said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively.

11. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming collimated objective within the tube, a fluorescent area arranged to receive said beam, 2. lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple in components of different colors simultaneously on the same image area, and a viewing screen located at said tube having elements thereon to obstruct the View of the left and right eye images by the right eye and left eye respectively.

12. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming collimated objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple in components of different colors simultaneously on the same image area, and a viewing screen located on the body of said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively.

13. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple in components of different colors simultaneously on the same image area, and a viewing screen located at said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively, the color filter being between the objective and the image area.

14. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple in components of different colors simultaneously on the same image area, and a viewing screen located on the body of said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively, the color filter being between the objective and the image area.

15. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective Within the tube, a fluorescent are-a arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple in components of different colors simultaneously on the same image area, and a viewing screen located at said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively, said image 'area and lenticular surface being located, respectively, in two anti-principal planes of said objective, the color filter being between the objective and the image area.

16. In a stereoscopic television cathode-ray beam receiver tube having an optical-image forming objective within the tube, a fluorescent area arranged to receive said beam, a lenticular surface in proximity to said area for receiving light therefrom in the rear of said lenticles, a color filter having color zones, an image area so located with regard to said objective as to exhibit at said tube a picture in two images of a stereoscopic couple in components of diiferent colors simultaneously on the same image area, and a viewing screen located on the body of said tube having elements thereon to obstruct the view of the left and right eye images by the right eye and left eye respectively, said image area and lenticular surface being located, respectively, in two anti-principal planes of said objective, the color filter being between the objective and the image area.

17. A method of producing stereoscopic television pictures which comprises transmitting impulses representing a picture in a vacuum electronically, forming therefrom on a viewing screen in said vacuum the images of a stereoscopic couple and exhibiting the picture thereon stereoscopically while in said vacuum through a stereoscopic grating mounted on'said screen.

18. A method of producing stereoscopic television pictures which comprises transmitting and producing, by the employment of a single beam, impulses representing a picture in a vacuum electronically, forming therefrom 15 References Cited in the file of this patent UNITED STATES PATENTS 2,107,464 Zworykin Feb. 8,1938 2,201,245 Ruska et al. May 21, 1940 2,289,978 Malter July 14, 1942 2,683,834 Wright July 13, 1954 FOREIGN PATENTS 497,691 Great Britain, Dec. 23, 1 938

US2756363A 1954-07-01 1954-07-01 Stereoscopic television receiving system Expired - Lifetime US2756363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2756363A US2756363A (en) 1954-07-01 1954-07-01 Stereoscopic television receiving system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2756363A US2756363A (en) 1954-07-01 1954-07-01 Stereoscopic television receiving system

Publications (1)

Publication Number Publication Date
US2756363A true US2756363A (en) 1956-07-24

Family

ID=23749704

Family Applications (1)

Application Number Title Priority Date Filing Date
US2756363A Expired - Lifetime US2756363A (en) 1954-07-01 1954-07-01 Stereoscopic television receiving system

Country Status (1)

Country Link
US (1) US2756363A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2837676A (en) * 1956-02-20 1958-06-03 Hyman A Michlin Method and means for optically reducing the perceptibleness of discrete component color elements of a color image
US2890363A (en) * 1954-08-16 1959-06-09 Aronstein Robert Method and apparatus for image reproduction
US3334179A (en) * 1963-06-04 1967-08-01 Winnek Television Systems Inc Stereoscopic television
US3529082A (en) * 1967-02-16 1970-09-15 Henry T Hoesli Multidimensional electrical-optical transmitting and reproducing system
US3688045A (en) * 1969-03-10 1972-08-29 Takanori Ohkoshi Method for photographing and reproducing three-dimensional images
JPS4714939U (en) * 1971-03-19 1972-10-21
US4506296A (en) * 1981-01-16 1985-03-19 Centre National De La Recherche Scientifique Method and device for three-dimensional visualization from video signals, notably for electron microscopy
US4989078A (en) * 1988-08-15 1991-01-29 Eastman Kodak Company Still video camera for recording stereo images on a video disk
US5475419A (en) * 1994-06-29 1995-12-12 Carbery Dimensions, Ltd. Apparatus and method for three-dimensional video

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2107464A (en) * 1931-09-26 1938-02-08 Rca Corp Television system
GB497691A (en) * 1937-07-27 1938-12-23 Reginald Stanley Clay Stereoscopic television
US2201245A (en) * 1936-11-17 1940-05-21 Firm Fernseh Aktien Ges Cathode ray projection tube
US2289978A (en) * 1940-11-30 1942-07-14 Rca Corp Television picture tube screen
US2683834A (en) * 1950-10-07 1954-07-13 Wright Arthur Cathode-ray tube for color television receivers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2107464A (en) * 1931-09-26 1938-02-08 Rca Corp Television system
US2201245A (en) * 1936-11-17 1940-05-21 Firm Fernseh Aktien Ges Cathode ray projection tube
GB497691A (en) * 1937-07-27 1938-12-23 Reginald Stanley Clay Stereoscopic television
US2289978A (en) * 1940-11-30 1942-07-14 Rca Corp Television picture tube screen
US2683834A (en) * 1950-10-07 1954-07-13 Wright Arthur Cathode-ray tube for color television receivers

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890363A (en) * 1954-08-16 1959-06-09 Aronstein Robert Method and apparatus for image reproduction
US2837676A (en) * 1956-02-20 1958-06-03 Hyman A Michlin Method and means for optically reducing the perceptibleness of discrete component color elements of a color image
US3334179A (en) * 1963-06-04 1967-08-01 Winnek Television Systems Inc Stereoscopic television
US3529082A (en) * 1967-02-16 1970-09-15 Henry T Hoesli Multidimensional electrical-optical transmitting and reproducing system
US3688045A (en) * 1969-03-10 1972-08-29 Takanori Ohkoshi Method for photographing and reproducing three-dimensional images
JPS4714939U (en) * 1971-03-19 1972-10-21
US4506296A (en) * 1981-01-16 1985-03-19 Centre National De La Recherche Scientifique Method and device for three-dimensional visualization from video signals, notably for electron microscopy
US4989078A (en) * 1988-08-15 1991-01-29 Eastman Kodak Company Still video camera for recording stereo images on a video disk
US5475419A (en) * 1994-06-29 1995-12-12 Carbery Dimensions, Ltd. Apparatus and method for three-dimensional video
WO1996001028A1 (en) * 1994-06-29 1996-01-11 Carbery Dimensions, Ltd. Apparatus and method for three-dimensional video

Similar Documents

Publication Publication Date Title
US3588224A (en) Adjustable bandwidth optical filter
US3621127A (en) Synchronized stereoscopic system
US5790086A (en) 3-D imaging system
US5283640A (en) Three dimensional television camera system based on a spatial depth signal and receiver system therefor
US4737840A (en) Color image projection apparatus with a screen including a shield plate, light-emitting layer and diffusion surface to expand viewing range of bright pictures
US4872750A (en) Image projection apparatus
US5036385A (en) Autostereoscopic display with multiple sets of blinking illuminating lines and light valve
US5365370A (en) Three dimensional viewing illusion with 2D display
US6160527A (en) Stereoscopic image display apparatus
US4853764A (en) Method and apparatus for screenless panoramic stereo TV system
US4807024A (en) Three-dimensional display methods and apparatus
EP0354851A2 (en) Technique of stereoscopic image display
US4583117A (en) Stereoscopic video camera
US5541642A (en) Stereoscopic imaging systems
US6906762B1 (en) Multi-layer display and a method for displaying images on such a display
US20070109401A1 (en) Monitor with integral interdigitation
US4528587A (en) Three-dimensional video apparatus and methods using composite and mixed images
US2623433A (en) Stereoscopic projection system, including anaglyphic and polarizing filters
US3495908A (en) Visual telephone subscriber alignment apparatus
US20030063186A1 (en) 2D/3D convertible display
US4650282A (en) Visual parallax compensation 3-D image structure
EP0540137A1 (en) Three-dimensional image display using electrically generated parallax barrier stripes
US5465175A (en) Autostereoscopic display device
US6128132A (en) Method and apparatus for generating an autostereo image
US6151062A (en) Stereoscopic image display apparatus using specific mask pattern