| 摘要 |
PROBLEM TO BE SOLVED: To provide a display device that achieves improvement of user convenience and suppressed power consumption during inspection.SOLUTION: A display part 110 is applied to a filter 10 stored in an openable and closeable door part 17. The display part 110 is disposed such that a user can visually recognize the display part 110 from the outside through an opening 18 provided in the door part 17 even in a closed state of the door part 17. The display part 110 automatically lights up when a lighting reservation time input by the user arrives. A lighting time of the display part 110 according to arrival of the lighting reservation time is set to be longer than input time increment of the lighting reservation time.SELECTED DRAWING: Figure 1 |
