Patent ID: 8242697
Filing Date: 2012-08-14
Classification: F21V,F21W,F21Y,H05B

Abstract:
1. A light emitting diode street lamp comprising: a light emitting diode array; a brightness sensor configured for sensing a brightness of an environment; a humidity sensor configured for sensing a humidity of the environment; and a controlling system electrically connected to the light emitting diode array, the humidity sensor, and the brightness sensor, a plurality of humidity ranges and a plurality of brightness ranges predefined in the controlling system, wherein the controlling system is configured for controlling the light emitting diode array to emit an amount of light according to a relationship between the sensed humidity and the plurality of humidity ranges, and according to a relationship between the sensed brightness and the plurality of brightness ranges; wherein the humidity sensor is a capacitive humidity sensor or a resistive humidity sensor; wherein the controlling system comprises a first judging unit, at least two brightness ranges are predefined in the first judging unit, and the first judging unit is configured for receiving a brightness value sensed by the brightness sensor and determining which brightness range the brightness value falls into.