Lamp

摘要

There is provided a lamp capable of informing a user that the LED lamp is at the end of its productive life and urging the user to replace the lamp reliably with a simple configuration. The lamp includes: a light emitting diode (1) as a light source; and a driving circuit (3) that turns on the light emitting diode (1) by an alternating-current or direct-current power source. The lamp further includes a life detecting element (2) that turns off the light emitting diode (1) following the occurrence of insulation deterioration in a resin material when the light emitting diode (1) has been operated for a predetermined time.

主权项

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.