AC AC DIRECT LED DRIVER CIRCUIT
The present invention provides an AC direct-connection type light emitting diode driving circuit comprising: a light emitting diode; a rectifier that rectifies AC voltage to DC voltage; a capacitor that discharges a charge voltage charged with the DC voltage; an input current driver that determines...
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| Hauptverfasser: | , |
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| Format: | Patent |
| Sprache: | eng ; kor |
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| Zusammenfassung: | The present invention provides an AC direct-connection type light emitting diode driving circuit comprising: a light emitting diode; a rectifier that rectifies AC voltage to DC voltage; a capacitor that discharges a charge voltage charged with the DC voltage; an input current driver that determines an input current corresponding to the DC voltage; and a headroom voltage controller connected to the light emitting diode, and controlling a headroom voltage so that a diode current set with the light emitting diode flows. Therefore, the present invention is capable of having an advantage of improving an efficiency and a flicker characteristic.
본 발명은, 발광 다이오드, AC 전압을 DC 전압으로 정류하는 정류기, 상기 DC 전압으로 충전한 충전 전압을 방전하는 커패시터, 상기 DC 전압에 대응하는 입력 전류를 결정하는 입력전류 구동기 및 상기 발광 다이오드와 연결되며, 상기 발광 다이오드로 설정된 다이오드 전류가 흐르게 헤드룸 전압을 제어하는 헤드룸 전압 제어기를 포함하는 AC 직결형 발광 다이오드 구동회로를 제공한다. |
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