| 摘要 |
PROBLEM TO BE SOLVED: To provide achievable service advantages for both owner and customer of a restaurant.SOLUTION: A system includes the steps in which: power is wirelessly supplied from a power supply device 20 to a display 50 attached to a coffee cup 60; the power supply device 20 transmits information determined beforehand to the display 50 which supplies power; and the display 50 receives the information from the power supply device 20 and displays it on a display device 59 using the power supplied from the power supply device 20. |
