Display processing apparatus

Details Display processing apparatus Display processing apparatus

1982-09-21

1986-12-16

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340723, 340748, G09G 100

Patent

active

046300392

ABSTRACT:
A display processing apparatus which can simply and easily control the size and display screen location of character patterns. The invention is comprised of a memory for storing character data of a predetermined size, an addressing circuit for reading out predetermined character data from the memory, and a transfer circuit for transferring the read character to a display circuit. The addressing circuit includes a counter, an arithmetic circuit for calculating A=MX+B, where X is the counter output value, M is a multiplication factor, B is a predetermined number and A is an address to be provided to the memory for reading out character data. An output shift register passes the memory output to the display circuitry only when the counter value is within predetermined limits, and a control circuit controls the values of the limits as well as M and B.

REFERENCES:
patent: 3474438 (1969-10-01), Lauher
patent: 3903517 (1975-09-01), Hafner
patent: 3999168 (1976-12-01), Findley et al.
patent: 4090188 (1978-05-01), Suga
patent: 4107786 (1978-08-01), Masaki et al.
patent: 4168489 (1979-09-01), Ervin

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