Patent ID: 8981911
Filing Date: 2015-03-17
Classification: H05B,Y02B

Abstract:
1. A wireless brightness detection device for detecting the intensity of a light output signal emitted by a light source controlled by a control device and for providing feedback information to the control device concerning actual light intensity levels of said light source for further control adjustment of the light source, said light source being powered by pulse-width modulation at a first frequency and at a second frequency different from the first frequency selectively, said device comprising: a standalone energy generator supplying a charging current converted from said signal of either said first frequency or said second frequency; electrical energy storage means for receiving and storing the charging current supplied by the standalone energy generator; a sensor designed to generate light intensity measurement values of said signal to provide said feedback information, wherein said wireless brightness detection device is in a standby mode when receiving said light output signal at said first frequency; and a reactivation circuit connected to the standalone energy generator to reactivate the sensor to provide said feedback information to the control device, comprising, tripping means connected to the signal detecting means for tripping a reactivation of the detection device when the signal detected by the signal detecting means is pulse-width modulated at the second frequency different from tile first frequency, said tripping means receiving as input a voltage that is a function of the charging current generated by the standalone energy generator, and