EP0250053A3 - Aging process for cathode ray tubes - Google Patents

Aging process for cathode ray tubes Download PDF

Info

Publication number
EP0250053A3
EP0250053A3 EP87201145A EP87201145A EP0250053A3 EP 0250053 A3 EP0250053 A3 EP 0250053A3 EP 87201145 A EP87201145 A EP 87201145A EP 87201145 A EP87201145 A EP 87201145A EP 0250053 A3 EP0250053 A3 EP 0250053A3
Authority
EP
European Patent Office
Prior art keywords
grid
cathode ray
aging process
voltage
ray tubes
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.)
Ceased
Application number
EP87201145A
Other languages
German (de)
French (fr)
Other versions
EP0250053A2 (en
Inventor
Samuel Sunwhee Chung
Charles Henry Rehkopf
Frankling George Reigel
Donald Louis Siefker
James Richard Stowe
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.)
Philips North America LLC
Original Assignee
North American Philips Consumer Electronics Corp
North American 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 North American Philips Consumer Electronics Corp, North American Philips Corp filed Critical North American Philips Consumer Electronics Corp
Publication of EP0250053A2 publication Critical patent/EP0250053A2/en
Publication of EP0250053A3 publication Critical patent/EP0250053A3/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/44—Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/44—Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances
    • H01J9/445—Aging of tubes or lamps, e.g. by "spot knocking"

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

An improved aging process for a cathode ray tube in which the main focusing grid (G3) is aged at a potential below that of the G2 grid, resulting in significantly reduced incidence of dark center cathode. In a typical example of the process the G3 grid is at a voltage of at least 100 volts, which voltage is at least 50 volts less than the G2 grid voltage.
EP87201145A 1986-06-19 1987-06-16 Aging process for cathode ray tubes Ceased EP0250053A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US87615086A 1986-06-19 1986-06-19
US876150 1986-06-19

Publications (2)

Publication Number Publication Date
EP0250053A2 EP0250053A2 (en) 1987-12-23
EP0250053A3 true EP0250053A3 (en) 1990-03-28

Family

ID=25367087

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201145A Ceased EP0250053A3 (en) 1986-06-19 1987-06-16 Aging process for cathode ray tubes

Country Status (4)

Country Link
EP (1) EP0250053A3 (en)
JP (1) JPS6324530A (en)
KR (1) KR880001015A (en)
CA (1) CA1304774C (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966287A (en) * 1975-06-27 1976-06-29 Rca Corporation Low-voltage aging of cathode-ray tubes
JPS61110935A (en) * 1984-11-05 1986-05-29 Toshiba Corp Manufacture of cathode-ray tube

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966287A (en) * 1975-06-27 1976-06-29 Rca Corporation Low-voltage aging of cathode-ray tubes
JPS61110935A (en) * 1984-11-05 1986-05-29 Toshiba Corp Manufacture of cathode-ray tube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, unexamined applications, E field, vol. 6, no. 107, June 17, 1982 THE PATENT OFFICE JAPANESE GOVERNMENT page 136 E 113 *

Also Published As

Publication number Publication date
JPS6324530A (en) 1988-02-01
EP0250053A2 (en) 1987-12-23
CA1304774C (en) 1992-07-07
KR880001015A (en) 1988-03-30

Similar Documents

Publication Publication Date Title
AU554743B2 (en) Controlling multiple cathode ray tubes
CA2112432A1 (en) Image-Forming Apparatus, and Designation of Electron Beam Diameter at Image-Forming Member in Image-Forming Apparatus
JPS6438947A (en) Color picture tube device
EP0971385A3 (en) In-line electron gun for a colour cathode-ray tube
GB8804749D0 (en) Cathode ray tubes having an implosion proof structure
AU8342682A (en) Cathode ray tube
KR900010820U (en) Electron gun for multi-stage focused cathode ray tube
EP0250053A3 (en) Aging process for cathode ray tubes
EP0369101A3 (en) Multistep focusing electron gun for cathode ray tube
AU5004685A (en) Cathode-ray tube having an ion trap
AU563275B2 (en) Cathode ray tube
TW331647B (en) Electron beam deflection system
EP0436401A3 (en) Multistep focusing electron gun for cathode ray tube
EP0283941A3 (en) Cathode ray tube having an electron gun constructed for readay refocusing of the electron beam
EP0349251A3 (en) Method for spot-knocking an electron gun mount assembly of a crt
FR2498810B1 (en) METHOD FOR FIXING AN ELECTRON CANON IN THE NECK OF A CATHODE RAY TUBE AND TUBE THUS OBTAINED
DE69010423D1 (en) With high efficiency cathodoluminescent screen for high-luminous cathode ray tubes.
DE3564641D1 (en) Electrostatic deflection type cathode ray tubes
JPS57190481A (en) High voltage color switch for beam penetration cathode ray tube
AU578659B2 (en) Cathode ray tube
EP0163443A3 (en) Cathode ray tube astigmatism correction apparatus
AU2440584A (en) Cathode ray tube
EP0133771A3 (en) Cathode driven crossed-field amplifier
JPS57190484A (en) High voltage color switch for beam penetraton cathode ray tube
JPS57190483A (en) High voltage color switch for beam penetraton cathode ray tube

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR GB NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB NL

RHK1 Main classification (correction)

Ipc: H01J 9/44

17P Request for examination filed

Effective date: 19900926

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NORTH AMERICAN PHILIPS CORPORATION

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NORTH AMERICAN PHILIPS CORPORATION

17Q First examination report despatched

Effective date: 19930706

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19931230

RIN1 Information on inventor provided before grant (corrected)

Inventor name: REHKOPF, CHARLES HENRY

Inventor name: REIGEL, FRANKLING GEORGE

Inventor name: SIEFKER, DONALD LOUIS

Inventor name: CHUNG, SAMUEL SUNWHEE

Inventor name: STOWE, JAMES RICHARD