GB1220900A - Measuring the beam landing characteristic of a shadow-mask cathode-ray tube - Google Patents

Measuring the beam landing characteristic of a shadow-mask cathode-ray tube

Info

Publication number
GB1220900A
GB1220900A GB39156/69A GB3915669A GB1220900A GB 1220900 A GB1220900 A GB 1220900A GB 39156/69 A GB39156/69 A GB 39156/69A GB 3915669 A GB3915669 A GB 3915669A GB 1220900 A GB1220900 A GB 1220900A
Authority
GB
United Kingdom
Prior art keywords
tube
screen
values
value
measuring
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
GB39156/69A
Inventor
John Kenneth Oxenham
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 Components Ltd
Original Assignee
Mullard Ltd
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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB39156/69A priority Critical patent/GB1220900A/en
Priority to DE19702034334 priority patent/DE2034334A1/en
Priority to US00055441A priority patent/US3723801A/en
Priority to NL7011270A priority patent/NL7011270A/xx
Priority to FR7028320A priority patent/FR2057876A5/fr
Publication of GB1220900A publication Critical patent/GB1220900A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

1,220,900. Testing cathode ray tubes. MULLARDLtd. Aug. 5, 1969, No. 39156/69. Heading G1A. In a method of measuring the beam landing characteristic of a shadow mask colour display cathode ray tube a detector arrangement, for light radiation resulting from electron excitation of a particular luminescent material present in the form of phosphor dots on the screen is positioned in the path of the radiation from a part of the screen area and in order to be substantially insensitive to light radiation resulting from the electron excitation of other screen areas may include a filter; a tube gun corresponding to the particular material is caused to emit an electron beam while the other beams are cut-off; the beam is scanned over the part of the area; a magnetic field is applied to the tube for purity correction in a given direction and its value is stepped between two values for different periods of the scan, the difference in values being such as to give a beam deflection between one value and the other in the order of the diameter of a dot of the luminescent material or the diameter of the spot formed by incidence of the electron beam on the screen, whichever is greater; the D.C. level of the purity field is adjusted so that the detector gives substantially the same output for each of said values and its value is a measure of the initial beam mislanding in the said direction. The same arrangement may be applied to obtaining a measure of the mislanding in a second direction which may be perpendicular to the first. Suitable stepped waveforms are exemplified and a commutator circuit in which they are developed and applied to the tube is described.
GB39156/69A 1969-08-05 1969-08-05 Measuring the beam landing characteristic of a shadow-mask cathode-ray tube Expired GB1220900A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB39156/69A GB1220900A (en) 1969-08-05 1969-08-05 Measuring the beam landing characteristic of a shadow-mask cathode-ray tube
DE19702034334 DE2034334A1 (en) 1969-08-05 1970-07-10 Method for regulating the landing of electron beams in a color picture display tube
US00055441A US3723801A (en) 1969-08-05 1970-07-16 Measuring the beam landing characteristic of a shadow-mask cathode-ray tube
NL7011270A NL7011270A (en) 1969-08-05 1970-07-30
FR7028320A FR2057876A5 (en) 1969-08-05 1970-07-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB39156/69A GB1220900A (en) 1969-08-05 1969-08-05 Measuring the beam landing characteristic of a shadow-mask cathode-ray tube

Publications (1)

Publication Number Publication Date
GB1220900A true GB1220900A (en) 1971-01-27

Family

ID=10407975

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39156/69A Expired GB1220900A (en) 1969-08-05 1969-08-05 Measuring the beam landing characteristic of a shadow-mask cathode-ray tube

Country Status (5)

Country Link
US (1) US3723801A (en)
DE (1) DE2034334A1 (en)
FR (1) FR2057876A5 (en)
GB (1) GB1220900A (en)
NL (1) NL7011270A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366579A1 (en) * 1976-09-30 1978-04-28 Rca Corp Colour purity fault simulator for colour TV tube - uses auxiliary deflection coils to pull beams from correct alignment
DE3016439A1 (en) 1979-05-03 1980-11-13 Philips Nv DEVICE FOR MEASURING AND METHOD FOR MEASURING AND SETTING THE CONVERGENCE OF ELECTRON BEAMS IN COLORED PIPES
EP0030259A1 (en) * 1979-12-07 1981-06-17 International Business Machines Corporation Method and apparatus for determining beam dimensions at the screen of a shadow mask cathode-ray tube
FR2480032A1 (en) * 1980-04-02 1981-10-09 Videocolor METHOD FOR ANALYZING THE CONVERGENCE OF A THREE-LINE CANNON CATHODIC TUBE AND DEVICE FORMING A SENSOR FOR IMPLEMENTING SAID METHOD
US4439735A (en) * 1981-07-17 1984-03-27 Zenith Radio Corporation Method and apparatus for testing line screen CRT registration
DE4219646A1 (en) * 1992-06-16 1993-12-23 Nokia Deutschland Gmbh Device and method for charge measurement in color picture tubes

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035834A (en) * 1976-04-12 1977-07-12 Matsushita Electric Corporation Of America Beam landing indicator for color cathode ray tube
JPS53144220A (en) * 1977-05-23 1978-12-15 Hitachi Ltd Automatic adjuster for color purity of color television
US4291256A (en) * 1979-06-11 1981-09-22 International Business Machines Corporation Alignment or correction of energy beam type displays
US4316211A (en) * 1980-09-30 1982-02-16 Rca Corporation Color kinescope convergence measuring system
DE3113454A1 (en) * 1981-04-03 1982-10-21 Standard Elektrik Lorenz Ag, 7000 Stuttgart METHOD AND DEVICE FOR DETERMINING THE COLOR UNIT AND THE CONVERGENCE CORRECTION SIZE ON A COLOR TELEVISION SCREEN OF IN-LINE TYPE WITH MAGNETIC DEFLECTING AGENTS
US4380716A (en) * 1981-10-09 1983-04-19 Hazeltine Corporation External magnetic field compensator for a CRT
US6097355A (en) * 1997-11-17 2000-08-01 Image Processing Systems, Inc. Purity/beam landing error measurement method for electronic display devices
US6058221A (en) * 1998-01-16 2000-05-02 Image Processing Systems, Inc. Electron beam profile measurement method and system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630548A (en) * 1937-12-04 1953-03-03 Muller Egon Nicolas Cathode-ray system
GB641936A (en) * 1946-08-02 1950-08-23 Cinema Television Ltd Improvements in or relating to television systems
US2611816A (en) * 1948-02-28 1952-09-23 Rca Corp Deflection control system
US2657331A (en) * 1948-06-05 1953-10-27 Int Standard Electric Corp Electronic color television
US2851525A (en) * 1953-02-20 1958-09-09 Kihn Harry Sweep linearity correction system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366579A1 (en) * 1976-09-30 1978-04-28 Rca Corp Colour purity fault simulator for colour TV tube - uses auxiliary deflection coils to pull beams from correct alignment
DE3016439A1 (en) 1979-05-03 1980-11-13 Philips Nv DEVICE FOR MEASURING AND METHOD FOR MEASURING AND SETTING THE CONVERGENCE OF ELECTRON BEAMS IN COLORED PIPES
EP0030259A1 (en) * 1979-12-07 1981-06-17 International Business Machines Corporation Method and apparatus for determining beam dimensions at the screen of a shadow mask cathode-ray tube
FR2480032A1 (en) * 1980-04-02 1981-10-09 Videocolor METHOD FOR ANALYZING THE CONVERGENCE OF A THREE-LINE CANNON CATHODIC TUBE AND DEVICE FORMING A SENSOR FOR IMPLEMENTING SAID METHOD
EP0037766A1 (en) * 1980-04-02 1981-10-14 Videocolor Convergence analysis process of cathode ray tubes having three in-line guns and measuring device implenting this process
US4439735A (en) * 1981-07-17 1984-03-27 Zenith Radio Corporation Method and apparatus for testing line screen CRT registration
DE4219646A1 (en) * 1992-06-16 1993-12-23 Nokia Deutschland Gmbh Device and method for charge measurement in color picture tubes

Also Published As

Publication number Publication date
DE2034334A1 (en) 1971-02-18
US3723801A (en) 1973-03-27
NL7011270A (en) 1971-02-09
FR2057876A5 (en) 1971-05-21

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