Self-stepping vertical scan system

Details Self-stepping vertical scan system Self-stepping vertical scan system

1975-12-05

1977-04-19

La Roche, Eugene R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Pulse storing

315365, 315391, 340324AD, H01J 2970

Patent

active

040190900

ABSTRACT:
Circuitry utilizing either composite sync or separated sync data provides self-stepping capability for the vertical scan of a CRT alphanumeric display. A counter counts horizontal sync pulses for varying the vertical scan rate between rows of characters in steps, and is synchronized with the beginning of each frame by the vertical sync pulse. Alphanumeric data can be displayed with any desired spacing between rows without change of character format and with minimum effect on the size of the displayed characters.

REFERENCES:
patent: 3816791 (1974-06-01), Fluegel

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