US2265657A - Television system - Google Patents

Television system Download PDF

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Publication number
US2265657A
US2265657A US268460A US26846039A US2265657A US 2265657 A US2265657 A US 2265657A US 268460 A US268460 A US 268460A US 26846039 A US26846039 A US 26846039A US 2265657 A US2265657 A US 2265657A
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US
United States
Prior art keywords
screen
lines
image
images
television
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
US268460A
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English (en)
Inventor
Manfred Von Ardenne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch Fernsehanlagen GmbH
Original Assignee
Fernseh GmbH
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 Fernseh GmbH filed Critical Fernseh GmbH
Application granted granted Critical
Publication of US2265657A publication Critical patent/US2265657A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only

Definitions

  • This invention relates to television systems and more particularly to television reproduction in natural colours and to stereoscopic television.
  • An object of the invention is to provide a novel apparatus for improving the quality of electro-.
  • Another object of the invention is to provide improved means for producing in a receiver pictures with exactly coinciding differently coloured components and to produce multicoloured pictures free from flicker.
  • Another object of the invention is to provide a television receiver for reproducing multicoloured and stereoscopic images, which is simple in construction and includes preferably a cathode ray tube as a source of light.
  • This cathode ray tube has preferably a screen, containing only a small number of light emitting areas, each area emitting light of a different wave length.
  • the screen composed of areas of difierent light emitting properties, it is also possible to use a small number of stationary colour or polarising filters.
  • three differently coloured or two stereoscopic lines of a picture are produced in a receiver adjacent to each other.
  • a picture of these lines is viewed or projected by means of an electrical or optical compensating device in such a manner, that the lines appear coincident for the observer.
  • the compensating device is moved in synchronism with the scanning of the lines, so that the scanning component having a direction vertical to the direction of the lines is compensated.
  • the lines do not only coincide geometrically on the viewing screen, but also with regard to time, so that there appears no flicker.
  • the cathode ray tube For the reception of television images the cathode ray tube is being made use of in most cases.
  • the cathode ray tube however makes special difficulties in this respect. It has been suggested to use a screen divided in adjacent differently coloured lines over its entire surface. This method has however the drawback, that the luminescent screen must be composed of lines of luminescent material corresponding with a precision of 1% with the lines drawn by the cathode ray. This precision cannot be obtained with the means to-day available for deflecting the cathode ray. In consequence of the limited precision of the deflection all methods must be excluded, in which the lines of the cathode ray must be brought to coincidence with lines mechanically produced on the screen. The same holds true with regard to stereoscopic images.
  • Fig. 1A shows a side View of .theithree line .el e; ments disposed close to the bottom of. tl-iel cathvv ode ray tube 2.
  • Fig. 2 shows a section through an arrange- 2'0 men-tincluding a .cathoderay tube, a mir'ror wheeL-andaviewing:screen and Fig. 3. shows a similar arrangement for pro.- ducing stereoscopic images.
  • Fig. 1 shows the screen it of acathoderay tube 2.
  • the left hand side of the figure shows a front view of the screenand the-rightihand sidea side view.
  • the screen consists of three lines of. luminescent material A, B, C, eachline luminating upon impingement of the. cathode '30 ray in adifierent colour, for instance blue, yellow and red.
  • the screen may for instance consist of zinc cadmium sulfide, the spectral .wave length of the different lineszof-thelscreen is obtained by using a differentncontent of cadmium sulfide,
  • Fig. 2 shows the complete. arrangement;
  • the cathode. ray tube 2 contains a. lineldeflecting system H and. an auxiliary defiecting...system 3 40 moving the .ray verticallyto thedirection of the lines.
  • a lens hissituatedinfrontof the cath- *line .C hasbeen scanned the deflecting. device :3
  • the deflection field 3 is synchronisedwith the frequencies. of the line deflecting field .in such a manner that its frequency is exactly one third of the .line frequency. Ac cording. to the invention the deflection of field 3 and the distancebetween. the. three lines is so arranged, that the. linesare-brought to coincide by the compensating device- In thepresent case the, mirrorwheel 4. is. used for building. .up the image. in the direction vertical to thelines. and at the same time, as compensating device.
  • the 'e5 speed, of rotation of the mirror Wheel is so chosenwith respect to the image -.frequency, that themirror wheel. rotates once. for aewhole numberof images. The mirror. wheel rotates very slowlyandxdoes neither .produce vibrationswm nor-acoustical disturbances.
  • a suitable device 'iorlproducing-the compensating movement of .the 'lig'ht.:.ray can be used. If a stereoscopic imageshall be produced only two lines are arranged on the luminescent screen.
  • Fig. 3 shows such a device.
  • the cathode ray-tube ⁇ 2' contains .aescreen with two: lines A fand, i3, In front of the screentwo strips 8; and-9 .01 polarising material are arranged; which-produce;:a polarisation in two directions pernpndicular-toeach other.
  • characteristic components and for" successively spatially displacing subsequent. groups of characteristic light componentstofproduce scansion of said screen and reproduction-of the -.trans'- v w-acme.-

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
US268460A 1938-03-29 1939-04-18 Television system Expired - Lifetime US2265657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE211575X 1938-03-29

Publications (1)

Publication Number Publication Date
US2265657A true US2265657A (en) 1941-12-09

Family

ID=5803476

Family Applications (1)

Application Number Title Priority Date Filing Date
US268460A Expired - Lifetime US2265657A (en) 1938-03-29 1939-04-18 Television system

Country Status (4)

Country Link
US (1) US2265657A (is")
BE (1) BE433540A (is")
CH (1) CH211575A (is")
FR (1) FR852308A (is")

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598941A (en) * 1950-05-20 1952-06-03 Solo S Roth Color television system
US2615975A (en) * 1948-07-30 1952-10-28 Rca Corp Color television receiving system
US4754324A (en) * 1982-02-19 1988-06-28 Raytheon Company Multi-color image display apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615975A (en) * 1948-07-30 1952-10-28 Rca Corp Color television receiving system
US2598941A (en) * 1950-05-20 1952-06-03 Solo S Roth Color television system
US4754324A (en) * 1982-02-19 1988-06-28 Raytheon Company Multi-color image display apparatus

Also Published As

Publication number Publication date
FR852308A (fr) 1940-01-30
BE433540A (is")
CH211575A (de) 1940-09-30

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