| 摘要 |
FIELD: lighting.SUBSTANCE: device for controlling levels of light output by a solid state lighting load at low dimming levels includes a bleed circuit connected in parallel with solid state lighting load. Bleed circuit includes a resistor and a transistor connected in series, transistor being configured to turn on and off in accordance with a duty cycle of a digital control signal when a dimming level set by a dimmer is less than a predetermined first threshold, decreasing an effective resistance of bleed circuit as dimming level decreases.EFFECT: technical result is reduction of light output by means of solid-state lighting load, when phase or dimming of regulator is set to a low set value.15 cl, 6 dwg |
