| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to easily manage the security of data and changes of each settings by simple operation even in the case that plural units of the same model are grounded, by performing one-to-one identification between a wireless input device and a LED display device main body, and security keeping via a user interface installed on the LED device main body. SOLUTION: The LED display device 10 permits various kinds of settings on the LED display device main body 10 through a wireless input device 20 like a remote controller etc. One-to-one identification and security keeping between the wireless input device 20 and the LED display device main body 10 are performed via a user interface installed on the LED display device main body 10. The user interface is provided with a password input function, a password enciphering function, a function to display and confirm the enciphered password as necessary, and a function permitting to change the enciphered password without special operation every time a password is inputted.
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