GB725525A - Beam-controlling systems for tri-colour kinescopes - Google Patents
Beam-controlling systems for tri-colour kinescopesInfo
- Publication number
- GB725525A GB725525A GB24677/53A GB2467753A GB725525A GB 725525 A GB725525 A GB 725525A GB 24677/53 A GB24677/53 A GB 24677/53A GB 2467753 A GB2467753 A GB 2467753A GB 725525 A GB725525 A GB 725525A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mask
- signals
- waves
- deflection
- beams
- 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
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/16—Picture reproducers using cathode ray tubes
- H04N9/28—Arrangements for convergence or focusing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
725,525. Colour television tubes. RADIO CORPORATION OF AMERICA. Sept. 7, 1953 [Sept. 17, 1952], No. 24677/53. Class 39 (1) [Also in Group XL (b)]. Relates to an electron beam controlling arrangement for a shadow-mask tri-colour cathode-ray tube 15, such as the tube described in the Proceedings of the LR.E. Vol. 39, No. 10 at page 1194, in which the beam from a single gun 22-24 is subject to a rotating field so as to produce the equivalent of a number of component beams 18, 19 and 20 approaching the mask 17 from different angles. The invention concerns the problem of maintaining the beams convergent at a point in the plane of the mask over the whole of a scanned raster. The rotating field is produced by deflecting means 26 from which the beams emerge divergent and are converged to the plane of the mask by coaxial cylindrical electrodes 27 and 28 energized statically by the potential across resistor 32 in the tube E.H.T. supply. According to the invention the energization of deflecting means 26 is varied as a function of the horizontal and vertical deflection signals so as to vary the beam divergence and thereby the convergence according to the angle of deflection. The deflection means 26 is energized by 90 degrees phase-displaced waves at the system sub-carrier frequency which are obtained from a local synchronized oscillator 28 applying its output through 90 degerees phase shifter 42 to amplifiers 43 and 44. Included between the oscillator and phase shifter is an amplitude modulator 41 to which are applied signals at the vertical and horizontal scan frequencies. A first pair of signals comprise parabolic waves 47 and 48 applied from generators 45 and 46 and in addition a second pair of signals 49 and 50 may be applied in the form of sawtooth waves. Generators 47 and 48 may be of the type described in the Proceedings of the I.R.E. Vol. 39, No. 10 at page 1249.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US310043A US2679614A (en) | 1952-09-17 | 1952-09-17 | Beam-controlling system for tricolor kinescopes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB725525A true GB725525A (en) | 1955-03-02 |
Family
ID=23200756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24677/53A Expired GB725525A (en) | 1952-09-17 | 1953-09-07 | Beam-controlling systems for tri-colour kinescopes |
Country Status (7)
Country | Link |
---|---|
US (1) | US2679614A (en) |
BE (1) | BE522838A (en) |
CH (1) | CH318661A (en) |
DE (1) | DE936637C (en) |
FR (1) | FR1086589A (en) |
GB (1) | GB725525A (en) |
NL (1) | NL181409B (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2849646A (en) * | 1953-02-24 | 1958-08-26 | Rauland Corp | Color convergence system |
US2849647A (en) * | 1954-03-04 | 1958-08-26 | Philips Corp | Color television reproducing device |
US2783413A (en) * | 1954-03-23 | 1957-02-26 | Rca Corp | High voltage supplies |
US2950406A (en) * | 1954-05-10 | 1960-08-23 | Philco Corp | Precision cathode-ray tube assembly |
US2813211A (en) * | 1954-11-08 | 1957-11-12 | Sucher Jerome | Color television tube |
US2938142A (en) * | 1955-04-01 | 1960-05-24 | Kendon Electronics Inc | Control of color television systems of the cathode ray tube type |
NL197194A (en) * | 1955-05-12 | |||
US2804572A (en) * | 1955-07-01 | 1957-08-27 | Admiral Corp | Method and apparatus for testing television receiver components |
NL210632A (en) * | 1955-09-16 | |||
US2943219A (en) * | 1955-09-19 | 1960-06-28 | Philco Corp | Beam positioning apparatus for cathode ray tubes |
US2859378A (en) * | 1956-05-21 | 1958-11-04 | Gen Electric | Electrode system for cathode ray tubes |
NL223160A (en) * | 1957-12-11 | |||
GB1195598A (en) * | 1967-01-14 | 1970-06-17 | Sony Corp | Cathode Ray Tube |
GB1217240A (en) * | 1967-04-06 | 1970-12-31 | Sony Corp | New and improved color picture tube system |
GB1221101A (en) * | 1967-04-06 | 1971-02-03 | Sony Corp | Convergence deflection system for a color picture tube |
GB1219637A (en) * | 1967-06-22 | 1971-01-20 | Sony Corp | Convergence system for a color picture tube |
GB1226614A (en) * | 1967-07-10 | 1971-03-31 | ||
US3548248A (en) * | 1967-07-19 | 1970-12-15 | Sony Corp | Misconvergence compensation for single gun,plural beam type color tv picture tube |
US3638064A (en) * | 1968-06-15 | 1972-01-25 | Sony Corp | Convergence deflection system for a color picture tube |
JPS52143713A (en) * | 1976-05-25 | 1977-11-30 | Matsushita Electric Ind Co Ltd | Convergence unit |
US4230972A (en) * | 1979-03-27 | 1980-10-28 | Motorola, Inc. | Dynamic focus circuitry for a CRT data display terminal |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2581487A (en) * | 1950-03-01 | 1952-01-08 | Rca Corp | Color television reproduction tube |
-
0
- NL NLAANVRAGE8002844,A patent/NL181409B/en unknown
- BE BE522838D patent/BE522838A/xx unknown
-
1952
- 1952-09-17 US US310043A patent/US2679614A/en not_active Expired - Lifetime
-
1953
- 1953-08-17 FR FR1086589D patent/FR1086589A/en not_active Expired
- 1953-09-07 GB GB24677/53A patent/GB725525A/en not_active Expired
- 1953-09-16 CH CH318661D patent/CH318661A/en unknown
- 1953-09-17 DE DER12566A patent/DE936637C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1086589A (en) | 1955-02-14 |
CH318661A (en) | 1957-01-15 |
DE936637C (en) | 1955-12-15 |
BE522838A (en) | |
NL181409B (en) | |
US2679614A (en) | 1954-05-25 |
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