Method and apparatus for causing a dot matrix display to appear

Details Method and apparatus for causing a dot matrix display to appear Method and apparatus for causing a dot matrix display to appear

1977-11-11

1980-05-27

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340752, 340771, G06K 1518

Patent

active

042053129

ABSTRACT:
A method and apparatus for causing the display on a dot matrix display panel to appear to travel by advancing the characters of a message to be displayed in fractional character increments. The circuitry for causing the display characters to appear to travel across the display panel includes a display character generator for cyclically providing the display panel with character information column-by-column for all of the characters of a complete message, and display column enabling electronics for sequentially energizing each column of the display. An incrementing circuit increments either the display character generator or the display column enabling electronics by one column position after the complete message has been displayed and after the display character generator and display column enabling electronics are reset. This gives the appearance on the display panel that the characters of the message have shifted one column position to the left or right. After the next resetting function, the character generator or enabling electronics is incremented two column positions, thereby giving the appearance that the message has again shifted to the left or right an additional column position. This process is continued until a complete character has been shifted out of the visible display, at which time the display character generator is reloaded with the complete message shifted by one character position, and the incrementing circuit is reset so that after the first complete message of the refreshed (reloaded) character information is displayed, the incrementing circuit increments the display by one column position, and the steps described above are repeated.

REFERENCES:
patent: 4024531 (1977-05-01), Ashby

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