Patent ID: 6198229
Filing Date: 2001-03-06
Classification: F21S,F21V,F21W,H05B,Y02B

Abstract:
Lighting apparatus comprising:a light source control apparatus for controlling luminescence provided by a light source which comprises a pressure sensor for sensing motion of air and a circuit coupled to the light source for changing the luminescence of the light source when motion of air is sensed and a control means changes the luminescence of the light source in response to sensed changes in the air pressure; andthe light source comprising first and second electric lamps located adjacent to each other, each supplied with a periodic electrical waveform and the luminescence of both lamps being controlled by the control apparatus; whereinthe control apparatus synchronously switches each periodic electrical waveform to control the luminescence of each of the lamps and the control apparatus operates in such a way that the first lamp is supplied with a first switched waveform and the second lamp is supplied with a second switched waveform and the control apparatus introduces a phase difference between the first and second switched waveforms in order to achieve apparent movement of illumination.