GB799533A - Improvements in and relating to electrostatic lens structures in electron discharge devices - Google Patents

Improvements in and relating to electrostatic lens structures in electron discharge devices

Info

Publication number
GB799533A
GB799533A GB34635/55A GB3463555A GB799533A GB 799533 A GB799533 A GB 799533A GB 34635/55 A GB34635/55 A GB 34635/55A GB 3463555 A GB3463555 A GB 3463555A GB 799533 A GB799533 A GB 799533A
Authority
GB
United Kingdom
Prior art keywords
field
lens
potential
convergence
dec
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
GB34635/55A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB799533A publication Critical patent/GB799533A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
    • H01J31/201—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode
    • H01J31/203—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode with more than one electron beam
    • H01J31/205—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode with more than one electron beam with three electron beams in delta configuration
    • 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/51—Arrangements for controlling convergence of a plurality of beams by means of electric field only
    • 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/62—Electrostatic lenses

Abstract

799,533. Multi-beam cathode-ray tubes. SYLVANIA ELECTRIC PRODUCTS, Inc. Dec. 2, 1955 [Dec. 6, 1954], No. 34635/55. Class 39(1). A multi-beam cathode-ray tube, particularly for colour television using an apertured mask has a bi-potential lens with unsymmetrical convergence field at the points of entry of the beams into the lens. The lens is formed by the cup-shaped convergence electrode 52 and the wall anode 26 of the tube or a cylinder supported by the gun mount and at the same potential as the wall anode, the cup 52 being shortened axially and given a potential such that the field is shaped as in Fig. 4, i.e., so that the entering beam is nearly normal to the equipotential lines. In an alternative form, Fig. 5, an axial pin 68 of the desired shape or size produces a modified field shape shown by equipotential lines 72. The dimensions and potentials of the electrodes and the desired shaping of the convergence field are discussed in the Specification.
GB34635/55A 1954-12-06 1955-12-02 Improvements in and relating to electrostatic lens structures in electron discharge devices Expired GB799533A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US473213A US3024380A (en) 1954-12-06 1954-12-06 Cathode ray tube gun construction

Publications (1)

Publication Number Publication Date
GB799533A true GB799533A (en) 1958-08-13

Family

ID=23878637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34635/55A Expired GB799533A (en) 1954-12-06 1955-12-02 Improvements in and relating to electrostatic lens structures in electron discharge devices

Country Status (6)

Country Link
US (1) US3024380A (en)
BE (1) BE543332A (en)
DE (1) DE1124160B (en)
FR (1) FR1139940A (en)
GB (1) GB799533A (en)
NL (2) NL94232C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE634599A (en) * 1962-07-06
US3252032A (en) * 1963-12-13 1966-05-17 Sylvania Electric Prod Electrode assembly locating means
US3258625A (en) * 1964-07-27 1966-06-28 Aligned electrode holders for mount- ing parallel array of electron guns
US4590403A (en) * 1984-08-31 1986-05-20 Rca Corporation Color picture tube having an improved inline electron gun
US6559586B1 (en) 2000-02-08 2003-05-06 Sarnoff Corporation Color picture tube including an electron gun in a coated tube neck

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563500A (en) * 1951-08-07 Plural beam tube
GB432485A (en) * 1933-12-29 1935-07-29 Alan Dower Blumlein Improvements in and relating to television and the like systems employing cathode ray tubes
US2173165A (en) * 1936-05-16 1939-09-19 Rca Corp Electron tube
US2223040A (en) * 1937-06-30 1940-11-26 Gen Electric Electron discharge device
GB505751A (en) * 1937-09-13 1939-05-15 Frederick Hermes Nicoll Improvements in or relating to cathode ray tubes
GB510699A (en) * 1937-12-04 1939-08-04 Otto Klemperer Improvements in or relating to electron discharge devices such as cathode ray tubes
US2249453A (en) * 1938-12-02 1941-07-15 Gen Electric Electron microscope
US2496127A (en) * 1947-02-05 1950-01-31 Rca Corp Electron gun for cathode-ray tubes
US2661436A (en) * 1951-11-07 1953-12-01 Rca Corp Ion trap gun
US2669672A (en) * 1953-03-10 1954-02-16 Sam H Kaplan Color image target structure
US2726347A (en) * 1953-04-30 1955-12-06 Rca Corp Multiple-beam electron gun
US2726348A (en) * 1953-05-26 1955-12-06 Rca Corp Multiple beam gun
US2729759A (en) * 1953-10-13 1956-01-03 Rca Corp Beam controlling apparatus
US2957106A (en) * 1954-08-12 1960-10-18 Rca Corp Plural beam gun

Also Published As

Publication number Publication date
NL202514A (en)
BE543332A (en)
US3024380A (en) 1962-03-06
FR1139940A (en) 1957-07-08
DE1124160B (en) 1962-02-22
NL94232C (en)

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