Patent ID: 9055629
Filing Date: 2015-06-09
Classification: H05B,Y02B

Abstract:
1. A silicon-controlled rectifier (SCR) dimming circuit, comprising: a) an SCR element configured to generate a lack-phase AC voltage based on a sinusoidal AC supply; b) a rectifier bridge configured to generate a lack-phase DC voltage based on said lack-phase AC voltage; c) a conduction angle generator configured to receive said lack-phase DC voltage from said rectifier bridge, and to generate a controlling signal that represents a conduction angle of said SCR element, a clamping voltage, and an adjustment signal; and d) a dimming signal generator configured to generate a dimming signal in response to said controlling signal, said clamping voltage, and said adjustment signal, wherein said dimming signal is configured to regulate luminance of a light-emitting diode (LED) load in accordance with said lack-phase DC voltage.