| 摘要 |
PROBLEM TO BE SOLVED: To improve convenience by combining a plurality of devices to arrange the devices.SOLUTION: An image display device 100A comprises: a display part 110A that electronically displays an image; a power generation part 120A that generates power from light and outputs the power; and a judgement part 192A that judges visibility of the image displayed by the display part 110A on the basis of an output value of the power generation part 120A. |
