Method and apparatus to control temperature of fuser in image forming apparatus by using power capsule

摘要

A method of controlling a temperature of a fuser in an image forming apparatus includes generating a power capsule including a soft start period in which a power supply is gradually increased to improve a flicker characteristic, a full turn on period in which the power supply is maximum, and a soft end period in which the power supply is gradually decreased to improve the flicker characteristic. The power capsule is profiled to supply a constant amount of power and to satisfy a predefined requirement for flicker and harmonic characteristics of an image forming apparatus with respect to the fuser in the soft start period, the full turn on period, and the soft end period. The method includes detecting the temperature of the fuser and controlling the temperature of the fuser by performing a power control operation corresponding to the power capsule according to a temperature variation of the detected temperature of the fuser with respect to a reference temperature of the fuser.

主权项

1. A method of controlling a temperature of a fuser of an image forming apparatus, the method comprising:
generating a plurality of power capsules each having a pattern of a power signal that is in the shape of a capsule, wherein a power level gradually increases, evens out at a sustained center portion and gradually decreases at a trailing end, and each having a different predetermined power pattern according to a predefined requirement for flicker and harmonic characteristics of the image forming apparatus with respect to the fuser; detecting the temperature of the fuser; and controlling the temperature of the fuser by supplying a power to the fuser in a unit of a power capsule selected from among the plurality of power capsules according to a temperature difference between the detected temperature of the fuser and a reference temperature of the fuser.