Patent ID: 8063567

Claim:
A light output control method for a lighting system, the lighting system comprising a plurality of sensors and a light-emitting unit, wherein the sensors include a first sensor and a second sensor with different operating frequencies, the light output control method comprising steps of: sensing a motion of an object within the sensing ranges of the sensors at different time spots, thereby generating multiple sensing values, wherein the motion of the object is a hand gesture of a user; obtaining a sensing sequence data according to the sensing values indicating the motion of the object sensed by the sensors, wherein the contents of the sensing sequence data include a first sensing value obtained at a first time spot when the object passes through the first sensor, a second sensing value obtained at a second time spot when the object passes through the second sensor, a third sensing value obtained at a third time spot when the object passes through the second sensor and a fourth sensing value obtained at a fourth time spot when the object passes through the first sensor; and controlling the light-emitting unit to perform a light output control operation if the sensing sequence data complies with a predetermined condition, wherein if the first sensing value, the second sensing value, the third sensing value and the fourth sensing value are sequentially obtained, and if the magnitude of the first sensing value is close to the second sensing value, the magnitude of the third sensing value is close to the fourth sensing value and the magnitude of the first sensing value is greater than the third sensing value, an O-shaped hand gesture is recognized such that the light-emitting unit is turned on to generate a light output.