[특허]Electrostatic discharge protection for luminaire

[미국특허] Electrostatic discharge protection for luminaire 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H05B-037/00 H05B-041/00 H05B-037/02 H05B-039/04 H05B-041/36 H05B-041/16 H05B-041/24
출원번호	US-0212074 (2011-08-17)
등록번호	US-8610358 (2013-12-17)
발명자 / 주소	Reed, William G.
출원인 / 주소	Express Imaging Systems, LLC
대리인 / 주소	Seed IP Law Group PLLC
인용정보	피인용 횟수 : 17 인용 특허 : 46

초록

An apparatus for protecting a solid state retrofit lighting or illumination system from electrostatic discharge damage caused by charge induced onto conductive surfaces of the lighting or illumination system.

대표청구항 ▼

1. A lighting system, comprising: at least one light emitting diode;a power supply coupled to the at least one light emitting diode and operable to convert a received power signal into a feedback-regulated power signal that is provided to the at least one light emitting diode, the power supply, including: a rectifier;a transformer coupled to the rectifier and having a primary winding and a secondary winding;a switch operable to at least partially control current passing through the primary winding;an overvoltage protection device coupled between an output of the rectifier and the primary winding; andan overcurrent protection device coupled between the switch and a common voltage reference that is common to the rectifier and the primary winding,the overcurrent protection device being operable to conduct an induced current from a ground reference node to the primary winding of the transformer; anda feedback circuit coupled between the at least one light emitting diode and the switch and operable to vary a magnitude of the feedback-regulated power signal. 2. The lighting system of claim 1 wherein the overvoltage protection device is a diode. 3. The lighting system of claim 1 wherein the overcurrent protection device is a resistor. 4. The lighting system of claim 3 wherein the resistor has a value of at least 631 Kiloohms and not greater than 3 Megaohms. 5. The lighting system of claim 3 wherein the resistor has a value of at least 1 Megaohm and not greater than 3 Megaohms. 6. The lighting system of claim 1 wherein the switch is at least one of a metal oxide semiconductor field effect transistor (MOSFET) and an insulated gate bipolar transistor (IGBT), and the overcurrent protection device is connected in parallel to a capacitor and is resistively coupled to a source terminal of the MOSFET or an emitter terminal of the IGBT. 7. The lighting system of claim 1 wherein the power supply is a flyback converter. 8. The lighting system of claim 1 wherein the feedback circuit senses a current through the at least one light emitting diode and in response pulse-width modulates a gate terminal of the switch to vary the magnitude of the feedback-regulated power signal. 9. A power supply to use with solid state lighting, comprising: a galvanized isolation transformer having a primary side and a secondary side; anda discharge path that electrically couples at least one of at least one light emitting diode, or a heat sink to which the at least one light emitting diode is thermally coupled, to a common ground of the primary side of the transformer via an overcurrent protection resistor, a capacitor electrically coupled in parallel with the overcurrent protection resistor, and a diode to handle current induced in the light emitting diode or the heat sink. 10. The power supply of claim 9 wherein the overcurrent protection resistor has a resistance that is at least 631 Kiloohms and not greater than 3 Megaohms. 11. The power supply of claim 9 wherein the overcurrent protection resistor has a resistance of at least 1 Megaohm and not greater than 3 Megaohms. 12. The power supply of claim 9, further comprising: a bulk capacitor filter at which the diode electrically couples the induced current to the overprotection resistor, wherein the diode is a transient voltage suppressor (TVS).

이 특허에 인용된 특허 (46) 인용/피인용 타임라인 분석

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[미국특허] Electrostatic discharge protection for luminaire 원문보기