GB798776A - Focussing arrangements for cathode ray tubes - Google Patents
Focussing arrangements for cathode ray tubesInfo
- Publication number
- GB798776A GB798776A GB27901/55A GB2790155A GB798776A GB 798776 A GB798776 A GB 798776A GB 27901/55 A GB27901/55 A GB 27901/55A GB 2790155 A GB2790155 A GB 2790155A GB 798776 A GB798776 A GB 798776A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- coil
- ray tubes
- tuned
- cathode
- 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
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
- H04N3/26—Modifications of scanning arrangements to improve focusing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
798,776. Cathode-ray tubes. STANDARD TELEPHONES & CABLES, Ltd. Sept. 30, 1955 [Oct. 6, 1954], No. 27901/55. Drawings to Specification. Class 39(1). [Also in Group XL(c)] Variation of focus with scan deflection in a cathode-ray tube is compensated by a sinusoidal compensating field generated by a circuit tuned to the scan frequency and coupled to the deflector coil or plate so that the circuit is excited by the flyback strokes of the deflection sawtooth waveform. For an electrostatically focused tube the tuned circuit is coupled to the normal focus electrode and for an electromagnetically focused tube, the coil of the tuned circuit may be arranged as an auxiliary focus coil, Fig. 3 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE195977T | 1954-10-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB798776A true GB798776A (en) | 1958-07-30 |
Family
ID=29555867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27901/55A Expired GB798776A (en) | 1954-10-06 | 1955-09-30 | Focussing arrangements for cathode ray tubes |
Country Status (2)
| Country | Link |
|---|---|
| AT (1) | AT195977B (en) |
| GB (1) | GB798776A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1273566B (en) * | 1966-07-09 | 1968-07-25 | Telefunken Patent | Circuit for television sets to correct distortions of the raster written on the fluorescent screen of a cathode ray tube |
| DE1273567B (en) * | 1966-08-06 | 1968-07-25 | Telefunken Patent | Circuit for television sets to correct distortions of the raster written on the fluorescent screen of a cathode ray tube |
| DE1294447B (en) * | 1967-08-24 | 1969-05-08 | Zentrallaboratorium Rundfunk | Circuit for generating horizontal convergence currents for a multi-beam picture tube |
| US4460851A (en) * | 1981-09-28 | 1984-07-17 | International Business Machines Corporation | Combined dynamic focus circuit flyback capacitor |
-
1955
- 1955-09-24 AT AT195977D patent/AT195977B/de active
- 1955-09-30 GB GB27901/55A patent/GB798776A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT195977B (en) | 1958-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1202307A (en) | A deflection circuit for a cathode ray tube | |
| GB515947A (en) | Improvements in or relating to cathode ray tube arrangements | |
| GB1060023A (en) | Focusing circuit for cathode ray tube | |
| GB729685A (en) | Improvements in or relating to colour-television image-reproducing apparatus | |
| GB878219A (en) | Improvements in or relating to cathode ray tubes | |
| GB798776A (en) | Focussing arrangements for cathode ray tubes | |
| US4555649A (en) | Cathode ray tube focusing circuitry | |
| ES427182A1 (en) | Cathode ray tubes herbicide | |
| ES487233A1 (en) | Magnetic electron lens for cathode-ray tube. | |
| ES264908A1 (en) | Circuit arrangement for dynamic postfocusing in electrostatic focusing cathode-ray tubes | |
| GB517597A (en) | Improvements in or relating to deflecting means for use with cathode ray tubes | |
| GB605572A (en) | Improvements in or relating to circuit arrangements embodying cathode ray tubes | |
| GB442724A (en) | Braun tube | |
| GB495707A (en) | Improvements in or relating to focussing systems for use in electric discharge tubes | |
| JPS54152912A (en) | Deflection output circuit | |
| GB677983A (en) | Improvements relating to cathode ray tube apparatus | |
| GB869123A (en) | Improvements in and relating to deflection systems for cathode ray tubes | |
| JPS563949A (en) | Color picture tube device | |
| GB399192A (en) | Television reception arrangement with braun tube | |
| GB449245A (en) | Cathode ray tube | |
| GB1358063A (en) | Scanning electron microscope | |
| GB505355A (en) | Improvements in or relating to cathode ray deflection | |
| SU136826A1 (en) | The method of transferring the electron beam in the sign of the cathode-ray tube | |
| NL7413436A (en) | CRT with constant magnetic focussing field - has electrostatic field to compensate variations in magnetic focussing | |
| FR2288386A1 (en) | CRT with constant magnetic focussing field - has electrostatic field to compensate variations in magnetic focussing |