| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink droplet detector which can inexpensively perform parallel detection, and which can reduce time for detection of nonejection. SOLUTION: The ink droplet detector has detection light formed between a beam-emitting means 2 and beam-receiving means 3 and 4 in such a manner as to cross a traveling path for an ink droplet and arranged in the state of corresponding to a plurality of nozzle arrays composed of a plurality of nozzles for ejecting the ink droplet, and detects the ink droplet by capturing the shade and shadow of the ink droplet, sequentially ejected from each of the nozzles, by the means 3 and 4. The ink droplet detector comprises: an ejection control circuit part 100 for ejecting the ink droplet from each of the nozzles of the plurality of nozzle arrays; and control part 101 which transmits the same ejection starting signal to the circuit part 100 in common when flying states of the ink droplets ejected from the respective nozzles are sequentially detected, and which performs control so that the timings of the ejection of the ink droplets ejected from the respective nozzles of the plurality of nozzle arrays can be synchronized with one another by the circuit part 100. COPYRIGHT: (C)2007,JPO&INPIT |
