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US 8,264,512 B2Granted
Method of controlling electric conduction through thermal head
AssigneeNisca Corporation
InventorHiroshi Mochizuki
Life of this patent
Estimating the term…
Abstract
A thermal printer detects an environmental temperature, and directly or indirectly detects a change in tension of an ink ribbon R. A correction value is read or calculated according to at least one of the detected environmental temperature and the detected change in the tension of the ink ribbon R. Thermal energy of each heating element in the thermal head is controlled based on the correction value so as to adjustably increase or reduce number of print lines on a print medium in a sub-scanning direction.
Claims11
A method of controlling electric conduction through a thermal head, comprising the steps of:
- detecting an environmental temperature,
- detecting a change in tension of an ink ribbon directly or indirectly,
- obtaining a correction value according to at least one of the detected environmental temperature and the detected change in the tension of the ink ribbon, the correction value increasing or decreasing print lines in a sub-scanning direction of a print medium, and
- controlling thermal energy of each heating element in the thermal head based on the correction value so that the thermal head increases or decrease a number of the print lines on the print medium in the sub-scanning direction to correct a printing area on the print medium.
1 more element
Dependencies are inferred from the claim text.