发明名称 |
LIGHTING APPARATUS USING MULTIPLE LED STRINGS WITH CURRENT MIRROR CIRCUITRY AND METHODS OF OPERATING SAME |
摘要 |
Lighting apparatus includes a first string of light-emitting diodes (LEDs) having a first terminal coupled to a current source and configured to produce a first correlated color temperature (CCT) and a second string of LEDs having a first terminal coupled to the current source and configured to produce a second CCT different from the first CCT. The lighting apparatus further includes a current control circuit coupled to second terminals of the first and second strings of LEDs and configured to vary a proportionality relationship between current levels in the first and second strings of LEDs responsive to variation in a current provided by the current source to the first terminals of the first and second strings of LEDs. The current control circuit may include a current mirror circuit and a control circuit configured to selectively enable and disable the current mirror circuit. |
申请公布号 |
WO2017015524(A1) |
申请公布日期 |
2017.01.26 |
申请号 |
WO2016US43454 |
申请日期 |
2016.07.22 |
申请人 |
CREE, INC. |
发明人 |
CHOBOT, Joseph Paul;WALTERS, Mike |
分类号 |
H05B33/08;G09G3/36;H05B37/02 |
主分类号 |
H05B33/08 |
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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