An encapsulating sheet includes a transparent layer in which a concave portion that is dented from the surface inwardly is formed and a phosphor encapsulating layer which fills the concave portion. Moreover, the first conductive layer may be a layer of a first material, the second conductive layer may be a layer of a second material, and the first and second materials may be different. If the key 15 pressed remains depressed for over a predetermined amount of time, the cellular phone 10 disregards the action and places the phone back in the standby mode.