发明名称 |
Driving light emitting diodes |
摘要 |
Disclosed is a driver that includes a main power supply that has outputs coupled across a string of light emitting diodes to supply a main current. A secondary power supply is coupled to a junction between successive light emitting diodes in the string to supply or withdraw a delta current from the junction. The delta current is at least five times smaller than the main current. A controller controls the secondary power supply to generate the delta current to obtain a desired spectral composition of the mixed light emitted by the string. |
申请公布号 |
US8203284(B2) |
申请公布日期 |
2012.06.19 |
申请号 |
US20080593308 |
申请日期 |
2008.03.31 |
申请人 |
PEETERS HENRICUS MARIE;VAN WOUDENBERG ROEL;BREMER PETRUS JOHANNES;KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
PEETERS HENRICUS MARIE;VAN WOUDENBERG ROEL;BREMER PETRUS JOHANNES |
分类号 |
H05B37/02 |
主分类号 |
H05B37/02 |
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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