Patent ID: 6525756
Filing Date: 2003-02-25
Classification: B41J

Abstract:
A heat-sensitive recording apparatus comprising:a thermal head having a plurality of heating elements arranged in a main scanning direction, a common electrode connected to all of the heating elements, and at least one connecting portion which connects said common electrode to a power source such that drive power is supplied at the heating elements located at both ends in said main scanning direction, wherein said common electrode is such that impedance from said at least one connecting portion to a heating element at one end in said main scanning direction is equal to impedance from said at least one connecting portion to a heating element at the other end in said main scanning direction; and an image processing section which, in accordance with image data, determines a current distribution within said common electrode for each of positions in the main scanning direction that correspond to said heating elements, said image processing section using the determined current distribution to determine amount of voltage drop due to resistance of said common electrode as a function of a position in said main scanning direction, and correcting resulting density unevenness in accordance with said image data based on both the amount of voltage drop due to the resistance of said common electrode as the function of the position in said main scanning direction and the amount of voltage drop due to resistances that are independent of the position in said main scanning direction.