According to one embodiment of the invention, a method comprises receiving a time-varying power waveform. The power waveform may be periodic and/or phase-controlled. Compressed within a power range associated with the time-varying power waveform, a pulse width modulated (PWM) signal is produced, which...http://www.google.com/patents/US7850327?utm_source=gb-gplus-sharePatent US7850327 - Apparatus, logic and method for emulating the lighting effect of a candle
