Patent ID: 8188684
Filing Date: 2012-05-29
Classification: G01C,H04M,H05B,Y02B

Abstract:
1. A portable device comprising: a light emission unit to emit light on a case; a clocking unit to clock time; an information acquisition unit to acquire position information indicating a position necessary for illuminating the light emission unit; a storing unit to store map information; and a control unit to determine whether to illuminate the light emission unit by using timekeeping information acquired from the clocking unit and the position information acquired from the information acquisition unit, and to control the light emission unit under either a light emission state or an extinction state from a result of the determination, wherein the control unit refers to the position information acquired by the information acquisition unit and the map information read from the storing unit, determines whether the portable device is on a road or not from a position on a map, and uses a result of determining whether the portable device is on a road or not, for light emission control of the light emission unit.