GB351378A - Improvements in or relating to television systems - Google Patents
Improvements in or relating to television systemsInfo
- Publication number
- GB351378A GB351378A GB35233/30A GB3523330A GB351378A GB 351378 A GB351378 A GB 351378A GB 35233/30 A GB35233/30 A GB 35233/30A GB 3523330 A GB3523330 A GB 3523330A GB 351378 A GB351378 A GB 351378A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- picture
- television
- currents
- signals
- 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
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/257—Picture signal generators using flying-spot scanners
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Closed-Circuit Television Systems (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
351,378. Television. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Nov. 22, 1930, No. 35233. Convention date, Dec. 11, 1929. [Classes 40 (iii) and 40 (v).] A television receiver comprises a cathode ray tube operated by currents of substantially uniform intensity interrupted to correspond with the light and shade of the picture, so as to prevent the position of the scanning ray being distorted by the varying intensity of the scanning ray. Thus, Fig. 1 represents the operating currents for very bright grading (a) through to dark e. At the transmitter, the lightsensitive cell 2, Fig. 2, controls the time interval between the discharges of a glow discharge device 1 feeding the grid of a valve 4. A variable condenser 3 adjusts the frequency of discharge, and the resulting signals are transmitted to the receiver. The frequency of interruption of the picture signals should be as great or greater than the highest analysed frequency of the picture signals.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE351378X | 1929-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB351378A true GB351378A (en) | 1931-06-25 |
Family
ID=6268308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35233/30A Expired GB351378A (en) | 1929-12-11 | 1930-11-22 | Improvements in or relating to television systems |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2090004A (en) |
| GB (1) | GB351378A (en) |
-
1930
- 1930-11-22 GB GB35233/30A patent/GB351378A/en not_active Expired
- 1930-12-06 US US500467A patent/US2090004A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2090004A (en) | 1937-08-17 |
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