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 tubeInfo
- 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
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.
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)
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)
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)
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 |
-
1969
- 1969-08-05 GB GB39156/69A patent/GB1220900A/en not_active Expired
-
1970
- 1970-07-10 DE DE19702034334 patent/DE2034334A1/en active Pending
- 1970-07-16 US US00055441A patent/US3723801A/en not_active Expired - Lifetime
- 1970-07-30 NL NL7011270A patent/NL7011270A/xx unknown
- 1970-07-31 FR FR7028320A patent/FR2057876A5/fr not_active Expired
Cited By (7)
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 |
---|---|
NL7011270A (en) | 1971-02-09 |
FR2057876A5 (en) | 1971-05-21 |
US3723801A (en) | 1973-03-27 |
DE2034334A1 (en) | 1971-02-18 |
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