SOLID STATE LIGHTING APPARATUS WITH COMPENSATION BYPASS CIRCUITS AND METHODS OF OPERATION THEREOF
摘要
A lighting apparatus includes a string of serially-connected light emitting devices and a bypass circuit coupled to first and second nodes of the string and configured to variably conduct a bypass current around at least one of the light-emitting devices responsive to a temperature and/or a total current in the string. In some embodiments, the bypass circuit includes a variable resistance circuit coupled to the first and second nodes of the string and configured to variably conduct the bypass current around the at least one of the light-emitting devices responsive to a control voltage applied to a control node and a compensation circuit coupled to the control node and configured to vary the control voltage responsive to a temperature and/or total string current.
申请公布号
EP2471347(A4)
申请公布日期
2014.04.30
申请号
EP20100819249
申请日期
2010.09.13
申请人
CREE, INC.
发明人
VAN DE VEN, ANTONY P.;NEGLEY, GERALD H.;HARRIS, MICHAEL JAMES;PICKARD, PAUL KENNETH;CHOBOT, JOSEPH PAUL;GIVEN, TERRY