| 摘要 |
PROBLEM TO BE SOLVED: To provide an easier-to-use electronic device. SOLUTION: In the electronic device such as a mobile information personal digital terminal as represented by a cellular phone, and an information terminal as represented by a personal computer or a fixed telephone, operation keys are provided with an EL display device, so that a user can identify each operation key via the characters, symbols, and figures displayed on the operation keys by the EL display device. Owing to the above constitution, the user can identify the operation keys even in a dark. |
