Patent ID: 6784908
Filing Date: 2004-08-31
Classification: B41J

Abstract:
A printer comprising:a thermal head for transferring a plurality of color inks successively to paper so that a color image can be printed on the paper according to image data; battery power supply means; voltage detecting means for detecting a voltage developed from said battery power supply means; and control means for feeding power supplied from said battery power supply means to a load at the timing immediately preceding the transfer of the color inks to the paper, instructing said voltage detecting means to detect the voltage developed from said battery power supply means at the predetermined timing immediately succeeding the feeding of power, and performing correction according to the result of the detection so that a printing density of inks transferred from said thermal head will remain constant irrespective of whether the voltage developed from said battery power supply is high or low, wherein: the predetermined timing is found within a period which, after power feeding of a predetermined period, immediately succeeds discontinuation of the feeding of power, which is supplied from said battery power supply to the load for a predetermined time; and during the period, the voltage developed from said battery power supply remains substantially constant.