US2882432A - Colour television picture tube - Google Patents

Colour television picture tube Download PDF

Info

Publication number
US2882432A
US2882432A US559719A US55971956A US2882432A US 2882432 A US2882432 A US 2882432A US 559719 A US559719 A US 559719A US 55971956 A US55971956 A US 55971956A US 2882432 A US2882432 A US 2882432A
Authority
US
United States
Prior art keywords
sereen
elements
picture tube
sad
lenses
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
US559719A
Other languages
English (en)
Inventor
Pieter Martinus Van Alphen
Adriaan Gerard Van Doorn
Francken Jan Carel
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2882432A publication Critical patent/US2882432A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/12—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays
    • 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]

Definitions

  • a eolour television picture tube is known, whieh eomprises a sereen provided with parallel, strip-shaped element lumineseing in relatively different eolours npon ex eitation by an electron beam and distributed in a eertain order of sueeession over the sereen.
  • Sueh a tube produees it is true, a eolour image, but sornetimes an observer gets the impression that the strip-shaped elements luminesce separately in different eolours. Then he does not get the impression of a uniformly coloured lumineseent image, but of a picture divided into strips of dlereht eolours.
  • the present invention has for its object te obviate ths disadvantage.
  • the eolour television picture tube of the aforesad kind has, to this end, the feature that on the observers side of the first sereen the tube eomprises a second sereen, whieh diiuses the passing light from the first sereen, however, substantially only in directions transverse to the drection of length of the strip shaped elements on the first sereen. It is found that this measure ean obviate the aforesaid disadvantage of the known tubes.
  • the second screen is provided with ribs extending parallel to the stripshaped elements on the first sereen.
  • these ribs operate preferably as eylinder lenses.
  • the second sereen te be at a maximum equal to the transverse dimension of the strp-shaped elements on the first sereen. Partieularly satisfaetory results are obtained, if the second sereen is spaeed apart from the first sereen by a distanee whieh exceeds twice the foeal distanee of the eylinder lenses and whieh is preferably at least equal to tour times ths foeal distanee.
  • Fig. 1 is a sehematic view of the plural sereen structure of the picture tube of the invention
  • Fig. 2 is a eross-seetional view of a picture tube with the new sereen structure.
  • Fig. 1 of the drawng shows a eross-seetion of the sereen 1 comprised in a eolour television picture tube: ths sereen is provided with parallel, strip-shaped elements, of whieh the drawng shows the elements 2, 3 and 4 in eross-seetion. These elements have the property that they, npon being struck by an electron bearn the drection of whieh is indieated by the arrows P, luminesce in diflerent eolours. These elements are distributed in a subscribeular order over the sereen and exhibit, in reality, an extremely small transverse dimension of about 0.1 mm. T his transverse dimension is designated in the drawng by a.
  • Eaeh of these strip-shaped elements luminesees in one of three In order to red images to be deseribed hereinafter are designated by one vertieal dash, the blue element 3 and the blue images Patented Apr- 14, 1959 by two vertieal dashes andthe green element 4 andthe green images by three vertical dashes.
  • the eylinder lenses 5, 6 and 7 produee, in the plane of the drawng, reduced images 8, 9 and 10 of the parts of the seetion of the strip-shaped elements 2, 3 and 4 in front of the eylinder lenses.
  • the height e of these images is, in the arrangement shown, /3 of the height of the stripshaped elements 2, 3 and 4.
  • Eaeh of the lenses 5, 6 and 7 produees also a reduced real image of the adjaeent strip-shaped elements, these images lying approximately also in a distanee of 1% times the foeal distanee of the lenses on the righthand side thereof.
  • the image of the element 3 produeed by the lens 5 is designated by 11, the image of the elements 2 and 4 produeed by the lens 6 by 12 and 14 respeetively and the image of the element 3 prodneed by the lens 7 by 15.
  • the effect amed at may be improved further, if the height of the eylinder lenses is chosen not to be equal to the height a of the strip-shaped elements, but to be smaller.
  • the said sereen may be made of glass or of a synthetie substanee. Partieularly in the latter case it most be considered that the material of the sereen inside the tube must not give rise t0 phenomena whieh are likely to detraet from the quality of the tube.
  • Fig. 2 shows the sereens 1 and 20 in postion in the eathode-ray tube, whieh ineludes the usual electron gun 22 and defleetion coils 23 at the neek end of the tube.
  • the strip-shaped lumineseent elements 2, 3 and 4 3 are mounted en a light-transparent glass support 24, and the sereen 20 eomprisng the eylindrieal lenses 5, 6 and 7 is spaced therefrom the proper dstance te obtain the finer lnestrueture of the inventon.
  • a eolor televsion picture tube eornprising, an electron-reeeiving sereen comprising a plurality of parallel, elongated, strip-shaped, eleetron-respnnsive, eolor-produeing areas with adjacent areas produeing dfierent eolored lght and with some areas produeing the Same colored light grouped in a periode manner on sad sereen, eleetron beam producing means on one side of sad sereen for exeting same, and a plurality of lentieular elements disposed en the side of sad sereen opposite to sad one side for elmnating the lne-like appearanee of the sereen, sad lentieular elements eooperatng with sad eolor-produeing areas to produee, in a transverse direetion t sad elongated areas, a plurality of images of eaeh
  • a lentieular element being assoeiated with eaeh of sad eolor-produeing areas, sad lentieular elements being spaeed from their assoeiated eolor-produeing area a dstanee greater than its foeal length and at whieh, in a transverse direetion te sad elongated areas, a plurality of images of eaeh eolor-produeing area are produeed on the side of sad lentieular elements remote frorn sad sereen, whereby the resultant maged line strueture has at least twiee the fineness of that of the eleetron-reeeivng sereen.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Filters (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Lenses (AREA)
US559719A 1955-01-19 1956-01-17 Colour television picture tube Expired - Lifetime US2882432A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL336442X 1955-01-19

Publications (1)

Publication Number Publication Date
US2882432A true US2882432A (en) 1959-04-14

Family

ID=19784554

Family Applications (1)

Application Number Title Priority Date Filing Date
US559719A Expired - Lifetime US2882432A (en) 1955-01-19 1956-01-17 Colour television picture tube

Country Status (7)

Country Link
US (1) US2882432A (fr)
BE (1) BE544492A (fr)
CH (1) CH336442A (fr)
DE (1) DE1033250B (fr)
FR (1) FR1140244A (fr)
GB (1) GB781838A (fr)
NL (1) NL194124A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039872A (fr) * 1973-08-11 1975-04-12

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337980A (en) * 1941-04-26 1943-12-28 Du Mont Allen B Lab Inc System for color television receivers
US2479820A (en) * 1947-05-01 1949-08-23 Remington Rand Inc Color television system
US2605434A (en) * 1949-12-08 1952-07-29 John H Homrighous Single beam three color cathoderay tube
US2682571A (en) * 1946-11-16 1954-06-29 Chromatic Television Lab Inc Television

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT157650B (de) * 1937-02-12 1939-12-27 Telefunken Gmbh Fernsehverfahren.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337980A (en) * 1941-04-26 1943-12-28 Du Mont Allen B Lab Inc System for color television receivers
US2682571A (en) * 1946-11-16 1954-06-29 Chromatic Television Lab Inc Television
US2479820A (en) * 1947-05-01 1949-08-23 Remington Rand Inc Color television system
US2605434A (en) * 1949-12-08 1952-07-29 John H Homrighous Single beam three color cathoderay tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039872A (fr) * 1973-08-11 1975-04-12
JPS579187B2 (fr) * 1973-08-11 1982-02-19

Also Published As

Publication number Publication date
FR1140244A (fr) 1957-07-17
CH336442A (de) 1959-02-28
BE544492A (fr)
DE1033250B (de) 1958-07-03
GB781838A (en) 1957-08-28
NL194124A (fr)

Similar Documents

Publication Publication Date Title
US4829365A (en) Autostereoscopic display with illuminating lines, light valve and mask
US4717949A (en) Autostereoscopic display with illuminating lines and light valve
US2480848A (en) Color television device
CA1046813A (fr) Systeme de retroprojection et ecran de projection
GB1267088A (fr)
DE3787970T2 (de) Stereoskopisches Wiedergabegerät mit beleuchteten Zeilen und Lichtventilen.
US2510106A (en) Catoptric television projector having tube screen and object surface connected by light-conducting filaments
US3495908A (en) Visual telephone subscriber alignment apparatus
US3877802A (en) Method of enlarging images without lenses and display device utilizing the method
US3345462A (en) Light valve projection apparatus
US2882432A (en) Colour television picture tube
US3267209A (en) Colored image reproduction device
US3130263A (en) Color display system
US3863093A (en) Multicolor direct view device
GB589345A (en) Improvements in optical filters and masks
US2756363A (en) Stereoscopic television receiving system
GB987677A (en) Improvements in and relating to television receivers
US2612614A (en) Cathode-ray tube for color television systems
US2621247A (en) Stereoscopic television
US2683834A (en) Cathode-ray tube for color television receivers
US3860955A (en) Color image pickup device
US2820395A (en) Stereoscopic view detectors
TW460900B (en) Method of producing a screen for a display device, screen for a display device produced by means of said method and display device provided with said screen
US2527896A (en) Optical image separating device with plural prism for dividing the light beam for colored photography and cinematography
US2957044A (en) Optical scanning device