Method and device for equalizing resistance of heating element o

Details Method and device for equalizing resistance of heating element o Method and device for equalizing resistance of heating element o

1994-03-18

1996-06-18

Fuller, Benjamin R.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Density control

324678, B41J 235

Patent

active

055282768

ABSTRACT:
When setting up the thermal head, respective resistances of the heating elements of the thermal head are measured, and a difference between the resistance value of each heating element and the smallest resistance value is detected. A predetermined amount of resistance trimming energy for lowering the resistance of the heating element by a predetermined constant amount is applied to each heating element for a number of times which depends on the detected difference in the resistance of the heating element from the smallest resistance, to trim the resistance of the heating element down to the smallest resistance.

REFERENCES:
patent: 4782202 (1988-11-01), Sawae et al.
Constantin, et al., Proceedings of the 1982 International Microelectronics Conference --Effect of Surge Voltage on Thin & Thick Film Resistors.

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