Patent ID: 9603213
Date: 2017-03-21
CPC Classifications: H05B

Claim:
1. A circuit for controlling a plurality of LED segments, comprising: a first input for receiving a control signal; a second input for receiving an oscillating signal; a first comparator for comparing the control signal and the oscillating signal; a second comparator for comparing the control signal and a second oscillating signal, wherein the second oscillating signal is based on the oscillating signal and an offset, wherein the offset and the oscillating signal are inputs to a summing circuit; a first switch for controlling a first LED segment, wherein an output of the first comparator controls the first switch so that the first LED segment is powered when both the oscillating signal and the second oscillating signal exceed the control signal; a second switch for controlling a second LED segment, wherein the output of the first comparator and an output of the second comparator control the second switch so that the second LED segment is powered when the control signal exceeds the oscillating signal and the second oscillating signal exceeds the control signal; a third switch for controlling a third LED segment, wherein the output of the second comparator controls the third switch so that the third LED segment is powered when the control signal exceeds both the oscillating signal and the second oscillating signal, wherein the first LED segment, the second LED segment, and the third LED segment each have a different characteristic.