Patent ID: 9717127
Date: 2017-07-25
CPC Classifications: F21V,F21Y,H05B

Claim:
1. A dimming system for controlling a luminance of a light emitting diode (LED) device, wherein the dimming system comprises: a signal generating circuit configured to generate a driving signal according to an input signal and switch the driving signal among a plurality of states according to a switch signal; and a first dimming circuit configured to generate a dimming signal according to the driving signal for adjusting the luminance of the LED device, wherein when the driving signal switches from a first state to a second state of the plurality of states, the first dimming circuit correspondingly changes the dimming signal, such that the luminance of the LED device is adjusted from a first luminance level to a second luminance level; and a second dimming circuit configured to adjust the input signal according to a control signal, such that the dimming signal is adjusted correspondingly and the luminance of the LED device is between the first luminance level and a minimum luminance level or between the second luminance level and the minimum luminance level.