| 摘要 |
A method and apparatus for thermal printing utilizes a thermal print head (20) having a plurality of thermal elements (22). In operation, a regulated current provided by current regulator diodes (56) is used to measure the resistance of each thermal element (22), the measured resistance being used by a processor (62) to determine the burn time for the associated thermal element (22) in dependence on the required energy for printing the relevent data item. Thus compensation is achieved for resistance variations among the individual thermal elements (22). Furthermore, gray scale printing can be effected. |
