Patent ID: 8901831
Filing Date: 2014-12-02
Classification: H05B

Abstract:
1. A lighting circuit comprising: a constant current power source; a first set of light-emitting elements electrically coupled with the constant current power source; a first drive circuit electrically coupled to the first set of light-emitting elements in parallel; a second set of light-emitting elements serially electrically coupled to each of the first set of light-emitting elements and the first drive circuit; and a second drive circuit serially electrically coupled to each of the first set of light-emitting elements and the first drive circuit and electrically coupled to the second set of light-emitting elements in parallel; wherein the first drive circuit is configured to receive a first control input; wherein the first drive circuit is configured to operate the first set of light-emitting elements responsive to the first control input; wherein the second drive circuit is configured to receive a second control input; wherein the second drive circuit is configured to operate the second set of light-emitting elements responsive to the second control input; wherein the first drive circuit is configured such that electricity will flow to each of the second set of light-emitting elements and the second drive circuit through the first drive circuit when the first control input is in a first state, and through the first set of light-emitting elements when the control input is in a second state.