초록 ▼

A printing apparatus which can detect remaining ink with high precision regardless of trembles of ink surface in an ink tank caused by various factors such as scanning speed of a carriage, scanning width, impact of the carriage at the time of reversing the carriage scanning direction and the like, a

A printing apparatus which can detect remaining ink with high precision regardless of trembles of ink surface in an ink tank caused by various factors such as scanning speed of a carriage, scanning width, impact of the carriage at the time of reversing the carriage scanning direction and the like, and can perform printing by efficiently utilizing the remaining ink, and a facsimile apparatus using the above printing apparatus. According to the apparatus, when a CPU controls print operation, the CPU dynamically changes the threshold value as a determination reference, utilized to detect remaining ink on the basis of an output current of a reflection type photosensor, in accordance with the scanning speed of carriage movement, the scanning width, and the stop period for reversing the scanning direction.

대표청구항 ▼

[ What is claimed is:] [1.] A printing apparatus for performing print on a print medium by scanning a printhead and an ink tank containing ink and by discharging ink from the printhead, said printing apparatus comprising:scan means for reciprocally moving the printhead and the ink tank together;dete

[ What is claimed is:] [1.] A printing apparatus for performing print on a print medium by scanning a printhead and an ink tank containing ink and by discharging ink from the printhead, said printing apparatus comprising:scan means for reciprocally moving the printhead and the ink tank together;detection means for detecting whether or not a liquid surface of ink is at a in the ink tank predetermined level; andcontrol means for determining a decreased state of the liquid surface of ink, said determination being based at least in part on a comparison of a detection result by said detection means against a reference, and for changing the reference for said determination in accordance with conditions of reciprocal movement of the ink tank by said scan means.