Patent ID: 9226374
Filing Date: 2015-12-29
Classification: H05B,Y02B

Abstract:
1. An illumination light source comprising: a light-emitting unit; a disturbance detecting unit configured to detect a specific disturbance; a timer circuit that times a first period and a second period, the first period starting from when the disturbance detecting unit detects the specific disturbance, the second period immediately following after the first period; and a driving circuit that turns ON the light-emitting unit at a start of the first period, causes the light-emitting unit to emit light during the first period, decreases illuminance of the light-emitting unit substantially linearly during the second period, and turns OFF the light-emitting unit at an end of the second period, wherein, a part of the disturbance detecting unit other than a lens is not covered with a non-translucent member, or the disturbance detecting unit is positioned close to the light-emitting unit.