LED luminaire

• US 9,788,378 B2
• Filed: 02/10/2015
• Issued: 10/10/2017
• Est. Priority Date: 02/10/2015
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Bendtsen, Andrew Dan, Wilcox, Kurt S., Sobieski, John
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): Kaiser, Syed M
• Application Number:
  US14/618,819
• Publication Number:
  US 20160234900A1
• Time in Patent Office: 973 Days
• Field of Search: 315201, 315294, 315224
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 23/0464 the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 45/3725 Switched mode power supply [SMPS]
• CPC Class Codes: H05B 45/375 using buck topology
• CPC Class Codes: H05B 45/38 using boost topology
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

According to one aspect, an LED operating network comprises a first circuit board made of a fiberglass reinforced epoxy laminate having power connection terminals that receive AC power, a rectification element, and at least one of a surge protection element and a fuse element. A second circuit board is made of a heat-dissipative material that receives rectified AC electrical power comprising a plurality of cycles from the first circuit board and having a plurality of LED dies and at least one LED driver circuit. The LEDs are turned on at different points during each of the plurality of cycles.

Claims

1. An LED luminaire, comprising:

a first circuit board made of a fiberglass reinforced epoxy laminate comprising power connection terminals that receive AC power, a rectification element, and at least one of a surge protection element and a fuse element; and

a second circuit board made of a heat-dissipative material that receives rectified AC electrical power comprising a plurality of cycles from the first circuit board and wherein a plurality of LED dies and at least one LED driver circuit are disposed on the second circuit board;

wherein the LEDs are turned on at different points during each of the plurality of cycles;

wherein the first circuit board is disposed remote from the second circuit board; and

wherein the first circuit board is disposed within a compartment of the LED luminaire and an optical member is disposed about the second circuit board.

2. The LED luminaire of claim 1, wherein the first circuit board is made of FR-4 material.

3. The LED luminaire of claim 1, wherein the second circuit board is made of at least one of a ceramic, aluminum, alumina, a composition comprising aluminum, and combinations thereof.

4. The LED luminaire of claim 1, wherein the second circuit board comprises multiple layers of material, wherein at least one layer is a ceramic or a dielectric base layer.

5. The LED luminaire of claim 1, wherein the second circuit board comprises a one of a PCB, an MCPCB, a laminate structure comprising one or more layers connected via adhesive, a flexible printed circuit board, and one or more adhesive layers.

6. The LED luminaire of claim 1, wherein the second circuit board comprises a ceramic base comprising at least one layer adhered thereon.

7. The LED luminaire of claim 6, wherein the at least one layer is flexible.

8. The LED luminaire of claim 1, wherein the LED luminaire is disposed outdoors.