| 摘要 |
Disclosed is an apparatus to display residual volume of a cartridge ribbon(1) in a color video printer. The apparatus comprises a detector(7), a memory(13), a comparer(12) and a display(9). The detector detects a rotation period of a suppling reel(3) or a winding reel(2). The memory(13) stores reference rotation periods according to the residual volume of each ribbons. The comparer(12) determines a present residual volume by comparing the reel rotation period from the detector(7) and the corresponding reference residual volume. The display(9) displays the present residual volume determined by the comparer(12). Thereby, more precise data of the present residual volume is acquired and displayed.
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