Incremental printing of symbolic information – Thermal marking apparatus or processes – Having driving circuitry for recording means
Reexamination Certificate
2007-04-25
2009-02-17
Feggins, K. (Department: 2861)
Incremental printing of symbolic information
Thermal marking apparatus or processes
Having driving circuitry for recording means
Reexamination Certificate
active
07492382
ABSTRACT:
The present invention discloses a voltage adjusting system and method for adjusting a driving voltage of a thermal print head by utilizing an electronic variable resistor. The voltage adjusting system includes a power converter, a voltage divider, an analog-to-digital converter (ADC), and a controller. The system and method of the present invention obtains a detecting voltage value through a feedback mechanism and the ADC, and then utilizes the detecting voltage value to control the electronic variable resistor implemented in the voltage divider to adjust the driving voltage of the thermal print head.
REFERENCES:
patent: 4573058 (1986-02-01), Brooks
patent: 5073786 (1991-12-01), Shimada et al.
patent: 5121135 (1992-06-01), Deguchi et al.
Chen Chia-Fu
Liu Kai-Hsiang
Feggins K.
Hsu Winston
Lite-On Technology Corp.
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