Patent ID: 6801234
Filing Date: 2004-10-05
Classification: B41J

Abstract:
A color thermal printer for printing at least three primary color images on a recording material in frame sequential fashion, said color thermal printer comprising:a feeding motor for feeding said recording material; at least one thermal head for printing one of said three primary color images on said recording material by one line in a one-line printing cyclic process, said thermal head having each heating element for generating heat based on image data by pressing said recording material with predetermined pressing force; a correction device for setting a correction coefficient, said correction device including at least one of a type dependency correction unit, a humidity dependency correction unit, and a sheet number dependency correction unit, said type correction unit setting a type dependency correction coefficient based on a type of said recording material, said humidity correction unit setting a humidity dependency correction coefficient based on the humidity, and said sheet number correction unit setting a sheet number dependency correction coefficient based on accumulative sheet number, said correction coefficient being based on said type correction coefficient, said humidity correction coefficient, and said sheet number correction coefficient; a determination device for calculating a printing load per said one line based on said image data, said pressing force of said thermal head, and said correction coefficient; and a motor controller for controlling the rotation speed of said feeding motor according to the printing load per said one line.