GB691805A - Improvements in or relating to television receivers - Google Patents
Improvements in or relating to television receiversInfo
- Publication number
- GB691805A GB691805A GB3078250A GB3078250A GB691805A GB 691805 A GB691805 A GB 691805A GB 3078250 A GB3078250 A GB 3078250A GB 3078250 A GB3078250 A GB 3078250A GB 691805 A GB691805 A GB 691805A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- ray tube
- voltage
- fly
- during
- 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
- H04N3/24—Blanking circuits
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
691,805. Television. GENERAL ELECTRIC CO., Ltd., and BIGGS, A. J. Nov. 8, 1951 [Dec. 18, 1950], No. 30782/50. Class 40 (iii). In a cathode-ray tube television receiver in which the fly-back stroke E, Fig. 1b, ends after the end of the corresponding line synchronizing pulse D, Fig. 1a, a voltage is derived during the fly-back stroke and applied to the cathode-ray tube so as to prevent the occurrence of any spurious elements in the picture due to overshoot in the trailing edge of the synchronizing pulse. As shown in Fig. 2, the video amplifier 4 feeds the cathode of the cathode-ray tube 5 and also feeds a separator circuit 8 to derive the line synchronizing pulses D to control the line time base 9. The grid of the cathode-ray tube receives bias from a source 7 and is also connected through a resistance 12 of the order of one megohm so as to receive the potential developed across deflector coils 11. During the scanning stroke I the developed voltage is small but during the fly-back stroke E the voltage reverses in polarity and becomes of sufficient magnitude to suppress the effect of any overshoot in the trailing edge of the synchronizing pulse. In receivers employing electrostatic deflection such a voltage may be derived by differentiation of the output of the line time base.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3078250A GB691805A (en) | 1950-12-18 | 1950-12-18 | Improvements in or relating to television receivers |
| FR1046288D FR1046288A (en) | 1950-12-18 | 1951-12-11 | Television receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3078250A GB691805A (en) | 1950-12-18 | 1950-12-18 | Improvements in or relating to television receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB691805A true GB691805A (en) | 1953-05-20 |
Family
ID=10313054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3078250A Expired GB691805A (en) | 1950-12-18 | 1950-12-18 | Improvements in or relating to television receivers |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1046288A (en) |
| GB (1) | GB691805A (en) |
-
1950
- 1950-12-18 GB GB3078250A patent/GB691805A/en not_active Expired
-
1951
- 1951-12-11 FR FR1046288D patent/FR1046288A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1046288A (en) | 1953-12-04 |
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