Drive circuit for thermal printing array

Details Drive circuit for thermal printing array Drive circuit for thermal printing array

1976-05-10

1977-06-28

Hartary, Joseph W.

Recorders

Thermal recording

219216, G01D 1510

Patent

active

040329259

ABSTRACT:
A drive circuit for a matrix coupled thermal printing bar which permits the address of large arrays as would be used in a thermal facsimile printing system without the necessity for individually driving each element or providing isolated diodes to prevent leakage paths. The circuit utilizes the application of an intermediate voltage to the unaccessed rows or columns to limit the applied power to the unaccessed elements below that required to raise them to printing temperatures.

REFERENCES:
patent: 3354817 (1967-11-01), Sakurai
patent: 3938136 (1976-02-01), Kawakami

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