发明名称 |
AC DRIVEN SOLID STATE LIGHTING APPARATUS WITH LED STRING INCLUDING SWITCHED SEGMENTS |
摘要 |
A diode selection circuit for a light emitting apparatus according to some embodiments includes a plurality of light emitting devices coupled in series. The diode selection circuit includes a comparator configured to receive a rectified AC input signal and a reference voltage and to generate a control signal in response to comparison of the rectified AC input signal with the reference voltage, a voltage controlled current source configured to supply a current to the plurality of light emitting diodes that is proportional to the rectified AC input signal, and a switch configured to receive the control signal and to shunt current away from at least one of the plurality of light emitting devices in response to the control signal. |
申请公布号 |
WO2011139624(A1) |
申请公布日期 |
2011.11.10 |
申请号 |
WO2011US33736 |
申请日期 |
2011.04.25 |
申请人 |
CREE, INC.;VAN DE VEN, ANTONY P.;GIVEN, TERRY |
发明人 |
VAN DE VEN, ANTONY P.;GIVEN, TERRY |
分类号 |
H05B41/24 |
主分类号 |
H05B41/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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