Thermal print head termperature control

Details Thermal print head termperature control Thermal print head termperature control

1988-09-23

1991-06-18

Reynolds, Bruce A.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 76PH, 400120, G01D 900, G01D 1510

Patent

active

050252674

ABSTRACT:
An apparatus and method is disclosed for controlling the temperature of a thermal print head and individual dot elements thereon, thereby optimizing print quality and reducing the thermal and electrical stress on the thermal print head. Hysteresis control determines the amount of energy supplied to each dot element in the thermal print head. Peak temperature control determines the width of the pulses supplied to the dot elements on the thermal print head. Pre-heating control raises the temperature of each dot element when the dot element has been idle for a predetermined period. Substrate temperature control maintains the temperature of said thermal print head at a predetermined value.

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