GB1046206A - Improvements in or relating to electric discharge tube circuits - Google Patents
Improvements in or relating to electric discharge tube circuitsInfo
- Publication number
- GB1046206A GB1046206A GB2739364A GB2739364A GB1046206A GB 1046206 A GB1046206 A GB 1046206A GB 2739364 A GB2739364 A GB 2739364A GB 2739364 A GB2739364 A GB 2739364A GB 1046206 A GB1046206 A GB 1046206A
- Authority
- GB
- United Kingdom
- Prior art keywords
- controlled
- tube
- cathode
- beam current
- matrix
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
- G09G1/20—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using multi-beam tubes
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
1,046,206. Cathode-ray tube circuits. RANK ORGANIZATION Ltd. July 16, 1965 [July 2, 1964], No. 27393/64. Heading H4T. In a cathode-ray tube symbol display arrangement of the kind in which the symbols are produced by the impingement on the tube screen of a plurality of electron beams selectively controlled by a matrix forming part of the tube gun so that each symbol is made up of a number of simultaneously produced individual dots, uniformity of dot brightness is enhanced by switching " ON " the electron beams with maximum permissible beam current for a fraction of a character cycle, i.e. for a fraction of the period during which the deflection means directs the beams to a given screen position, before " stepping-on " to the next character position. Fig. 1 shows one embodiment in which the beam current is controlled by the matrix drive amplifiers which are only energized for a short period by means of a four microsecond width pulse t derived from the timing input signals. In a second embodiment (Fig. 2, not shown) the matrix amplifiers are permanently energized and the beam current controlled by applying the pulse t, in inverted polarity, to the tube cathode. The brightness may also be controlled by varying the width of the pulses t.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2739364A GB1046206A (en) | 1964-07-02 | 1964-07-02 | Improvements in or relating to electric discharge tube circuits |
| NL6508453A NL6508453A (en) | 1964-07-02 | 1965-07-01 | |
| FR23046A FR1449009A (en) | 1964-07-02 | 1965-07-01 | Device for displaying alphanumeric symbols |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2739364A GB1046206A (en) | 1964-07-02 | 1964-07-02 | Improvements in or relating to electric discharge tube circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1046206A true GB1046206A (en) | 1966-10-19 |
Family
ID=10258861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2739364A Expired GB1046206A (en) | 1964-07-02 | 1964-07-02 | Improvements in or relating to electric discharge tube circuits |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB1046206A (en) |
| NL (1) | NL6508453A (en) |
-
1964
- 1964-07-02 GB GB2739364A patent/GB1046206A/en not_active Expired
-
1965
- 1965-07-01 NL NL6508453A patent/NL6508453A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL6508453A (en) | 1966-01-03 |
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