GB872607A - Improvements in and relating to cathode ray tube apparatus and systems - Google Patents

Improvements in and relating to cathode ray tube apparatus and systems

Info

Publication number
GB872607A
GB872607A GB37640/57A GB3764057A GB872607A GB 872607 A GB872607 A GB 872607A GB 37640/57 A GB37640/57 A GB 37640/57A GB 3764057 A GB3764057 A GB 3764057A GB 872607 A GB872607 A GB 872607A
Authority
GB
United Kingdom
Prior art keywords
radiation
strips
tube
green
layer
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
Application number
GB37640/57A
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.)
Space Systems Loral LLC
Original Assignee
Philco Ford 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 Philco Ford Corp filed Critical Philco Ford Corp
Publication of GB872607A publication Critical patent/GB872607A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/22—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information
    • H04N9/24—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/26—Luminescent screens with superimposed luminescent layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Luminescent Compositions (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

872,607. Cathode-ray tubes. PHILCO CORPORATION. Dec. 3, 1957 [Dec. 3, 1956], No. 37640/57. Class 39(1). A cathode-ray tube has a luminescent screen provided with portions emitting radiations of two different ranges of wavelengths and with a covering layer deposited on these portions for reflecting radiation of one range of wavelengths while transmitting radiation of the other range of wavelengths. In a colour television tube the green strips 44 are also indexing strips emitting ultra-violet or infra-red radiation. This radiation is transmitted through the layer 50 to a photocell 65 controlling the indexing system. A window 70 is provided in the wall of the tube for the emergence of the radiation. Anode layer 34 may be constituted to reflect the radiation as described in Specification 822,017. The glass face plate 60 of the tube may also be constructed to reflect the radiation. For emitting ultra-violet radiation the green strips, e.g. of magnesium activated zinc orthosilicate; may include unactivated zinc orthosilicate which also serves to balance the light output of the green strips relative to that of the blue and red strips as described in Specification 753,452. Alternatively there may be used activated zinc oxide which has two peaks of emission, one in the green region of the spectrum and the other near the ultra-violet region. Layer 50 may be of silver. For emitting infra-red radiation, the green strips may include manganese activated magnesium silicate. Layer 50 then consists of silicon, or germanium. Indexing material may be placed in the spaces between the colour phosphors instead of in one of the phosphor strips. The invention may also be applied to a monochrome tube in which indexing signals are used to stabilise the linearity of sweep.
GB37640/57A 1956-12-03 1957-12-03 Improvements in and relating to cathode ray tube apparatus and systems Expired GB872607A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US625734A US2923846A (en) 1956-12-03 1956-12-03 Electrical systems
FR816838A FR1248229A (en) 1956-12-03 1960-01-27 Cathode ray tubes for color television receivers

Publications (1)

Publication Number Publication Date
GB872607A true GB872607A (en) 1961-07-12

Family

ID=26184931

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37640/57A Expired GB872607A (en) 1956-12-03 1957-12-03 Improvements in and relating to cathode ray tube apparatus and systems

Country Status (5)

Country Link
US (1) US2923846A (en)
DE (1) DE1230453B (en)
FR (1) FR1248229A (en)
GB (1) GB872607A (en)
NL (1) NL247954A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3152042C2 (en) * 1980-05-29 1989-01-05 Mitsubishi Denki K.K., Tokio/Tokyo, Jp

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177389A (en) * 1961-03-30 1965-04-06 Rca Corp Color-kinescopes of the line-screen sensing variety
US3164744A (en) * 1961-05-23 1965-01-05 Rca Corp Color tube beam indexing with ultra-violet rays
US3280250A (en) * 1962-06-01 1966-10-18 Scope Inc Color television receiver including means for scanning the same horizontal lines during consecutive fields
GB1175698A (en) * 1965-12-27 1969-12-23 Sony Corp Colour Cathode Ray Tube

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633547A (en) * 1950-06-30 1953-03-31 Rca Corp Two-sided electron-sensitive screen
US2951113A (en) * 1954-05-27 1960-08-30 Itt Color television receiver
US2737608A (en) * 1954-11-29 1956-03-06 Rca Corp Color image reproduction apparatus
US2774908A (en) * 1955-03-30 1956-12-18 Rca Corp Cathode-ray tubes of the feed-back variety

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3152042C2 (en) * 1980-05-29 1989-01-05 Mitsubishi Denki K.K., Tokio/Tokyo, Jp

Also Published As

Publication number Publication date
US2923846A (en) 1960-02-02
FR1248229A (en) 1960-12-09
NL247954A (en) 1964-03-10
DE1230453B (en) 1966-12-15

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