Patent ID: 8755843
Filing Date: 2014-06-17
Classification: G06F,H04M

Abstract:
1. A portable telephone equipped with key backlights comprising: key backlight light-emitting units that are provided corresponding to each of a plurality of operation keys and that illuminate each of the operation keys; and a control unit that supplies control signals that provide instructions to said key backlight light-emitting units about colors of light that is to be emitted; wherein: said key backlight light-emitting units each include a plurality of light-emitting devices that produce different colors and a lighting control unit that realizes lighting control of the plurality of light-emitting devices in accordance with control signals from said control unit; and said control unit supplies control signals for causing light to be emitted in a specified color in the key backlight light-emitting units that correspond to one or a plurality of operation keys and supplies control signals for causing light to be emitted in colors other than the specified color in said key backlight light-emitting units other than the key backlight light-emitting units that are lighted in the specified color, wherein: upon the occurrence of an event relating to specified information, the control unit supplies control signals that cause light to be emitted in a first specified color to the key backlight light-emitting unit that illuminates a specified operation key that displays the specified information; the control unit supplies control signals that cause light to be emitted in a second specified color to the key backlight light-emitting units that illuminate a plurality of operation keys that are installed closed to said specified operation key and that are arranged in different directions with reference to said specified operation key; and the control unit, upon the passage of each prescribed time interval, supplies control signals that cause light to be emitted in said second specified color to a greater number of key backlight light-emitting units than the number of key backlight light-emitting units to which control signals that cause light to be emitted in the second specified color were supplied before the passage of the prescribed time interval.