Patent ID: 9414464
Filing Date: 2016-08-09
CPC Classification: F21V,H05B,Y02B

Claim Text:
1. A lighting system comprising: a lighting fixture including a first controller configured to control a light source; and a sensing device, wherein the sensing device includes: the first controller is configured to light the light source at a dimming level according to the dimming rate set by the second controller, the second controller is configured to judge whether or not a person is present in the predetermined area, based on the image of the predetermined area taken by the image sensor, the second controller is configured to, when concluding that a condition where no person is present in the predetermined area continues for a predetermined time period, perform an operation of decreasing the dimming rate by a preset value and increasing the sensitivity of the image sensor for a preset time period, the second controller is configured to judge whether a person is present in the predetermined area, based on whether a difference between a brightness value of the image of the predetermined area taken by the image sensor and a brightness value of a reference image is not less than a predetermined threshold, and the sensitivity of the image sensor is determined by the predetermined threshold.