| 摘要 |
PROBLEM TO BE SOLVED: To securely clean substances in an area to be cleaned by confirming the existence of the substances reflecting/absorbing ultraviolet rays and by visibly judging the positions. SOLUTION: The vacuum cleaner is provided with a two-dimensional CCD (charge coupled device) for sensing an image through the rays reflecting a floor 8 by receiving the rays reflected on the floor 8 and a liquid crystal display device 7 for displaying the ultraviolet ray information generated from the image through the rays sensed by the CCD. COPYRIGHT: (C)2007,JPO&INPIT
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