发明名称 |
LIGHT EMITTING DEVICE DRIVER CIRCUIT, CURRENT RIPPLE REJECTER THEREIN, AND CURRENT RIPPLE REJECTION METHOD THEREFOR |
摘要 |
The present invention discloses a light emitting device driver circuit, a current ripple rejecter therein, and a current ripple rejection method therefor. The light emitting device driver circuit includes: a power converter circuit, for converting an input voltage carrying an AC component to an output voltage and supplying an output current; and a current ripple rejecter, which is coupled to the power converter circuit, for filtering a ripple of the output current to generate a light emitting device current, and supplying the light emitting device current to a light emitting device circuit. The current ripple rejecter includes: a low-pass-filter circuit, for filtering the ripple of the output current to generate a filtered current; and a current amplification circuit, which is coupled to the low-pass-filter circuit, for amplifying the filtered current to generate an amplified current; wherein the light emitting device current includes the amplified current. |
申请公布号 |
US2015340944(A1) |
申请公布日期 |
2015.11.26 |
申请号 |
US201514706915 |
申请日期 |
2015.05.07 |
申请人 |
Lin Tzu-Chen;Wu Chang-Yu;Chen Isaac Y. |
发明人 |
Lin Tzu-Chen;Wu Chang-Yu;Chen Isaac Y. |
分类号 |
H02M1/14;H05B37/02 |
主分类号 |
H02M1/14 |
代理机构 |
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代理人 |
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主权项 |
1. A light emitting device driver circuit, comprising:
a power converter circuit, for converting an input voltage carrying an AC component to an output voltage and supplying an output current; and a current ripple rejecter, which is coupled to the power converter circuit, for filtering a ripple of the output current to generate a light emitting device current which is supplied to a light emitting device circuit, the current ripple rejecter including:
a low-pass-filter circuit, which is coupled to the power converter circuit, for filtering the ripple of the output current to generate a filtered current; anda current amplification circuit, which is coupled to the low-pass-filter circuit, for amplifying the filtered current to generate an amplified current; wherein the light emitting device current includes the amplified current. |
地址 |
Tianzhong Township TW |