Patent ID: 9137869
Filing Date: 2015-09-15
Classification: H05B

Abstract:
1. An illumination apparatus comprising: a power supply circuit; a capacitive element connected between output terminals of the power supply circuit; a light emitting unit including at least one first semiconductor light emitting element and at least one second semiconductor light emitting element connected with the at least one first semiconductor light emitting element in series; and a keying circuit provided between the capacitive element and the light emitting unit and configured to electrically open or close a first power supply path which passes through both the at least one first semiconductor light emitting element and the at least one second semiconductor light emitting element from the power supply circuit or the capacitive element, and a second power supply path which passes through the at least one first semiconductor light emitting element without passing through the at least one second semiconductor light emitting element from the capacitive element, wherein the keying circuit is set in a first state in which the first power supply path is electrically closed and the second power supply path is electrically opened while a power from the power supply circuit is being supplied, and is set in a second state in which the first power supply path is electrically opened and the second power supply path is electrically closed when a reduction in quantity of charges of the capacitive element is detected after the power supplied from the power supply circuit is stopped.