Thermal recording system using unregulated power supply

Details Thermal recording system using unregulated power supply Thermal recording system using unregulated power supply

1985-06-18

1987-08-04

Evans, Arthur G.

Recorders

Thermal recording

400120, G01D 1510

Patent

active

046849599

ABSTRACT:
A thermal recording system includes a thermal print head provided with a plurality of electrical resistors arranged in the form of a single row and selectively activated when an activation pulse is supplied, a brute supply for supplying a power supply voltage to the resistors and a pulse generator for controlling the duration of the activation pulse in accordance with the level of the power supply voltage actually applied to the resistors. The pulse generator controls the pulse width of the activation pulse so as to maintain substantially constant the activation energy defined as a product of (power supply voltage actually applied).sup.2 and (pulse width of activation pulse).

REFERENCES:
patent: 4168421 (1979-09-01), Ito
patent: 4219824 (1980-08-01), Asai
patent: 4409600 (1983-10-01), Minowa

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