Patent ID: 8928224
Filing Date: 2015-01-06
Classification: H05B

Abstract:
1. A lamp comprising: a light emitting diode as a light source; and a driving circuit that turns on the light emitting diode by an alternating-current or direct-current power source, wherein the lamp further comprises a life detecting element that turns off the light emitting diode before occurrence of reduction of brightness of the light emitting diode by blocking a current that turns on the light emitting diode subsequent to the occurrence of insulation failure of a resin material in the life detecting element due to heat produced by the light emitting diode when the light emitting diode has been operated for a predetermined time; and the life detecting element is arranged at a distance of 10 mm or less from a light emitting portion of the light emitting diode or a member for transferring heat produced by the light emitting diode.