Solid state lamp for retrofit

Patent metadata

Field	Value
Publication number	US-2020378564-A1
Application number	US-202016999766-A
Country	US
Kind code	A1
Filing date	Aug 21, 2020
Priority date	Sep 21, 2015
Publication date	Dec 3, 2020
Grant date	—

Abstract

A HID solid state retrofit lamp includes a circumferential array of solid state light sources mounted on circuit boards, a heat sink located in the lamp's interior volume, and a fan positioned in the interior volume to force airflow across the heat sink. A capper assembly includes at least one aperture to vent the interior volume, and an intermediate circuit board within the capper assembly. The intermediate circuit board distributes electrical power to the circuit boards by tabs and contacts extending from the boards that are mechanically bonded together. An optical transmissive shield is positioned exterior to the circumferential array, and can include prismatic structures to direct light emitted from the LED sources in an off axis direction.

First claim

1 . A high intensity discharge (HID) solid state retrofit lamp comprising:
one or more circuit boards configured as a circumferential array defining an interior volume of the retrofit lamp, each circuit board having an interior surface, an exterior surface, a first edge, and a second edge; solid-state light sources mounted on the exterior surface of the one or more circuit boards; a heat sink located in the interior volume, the heat sink in thermal communication with the interior surface of the one or more circuit boards; an active cooling device fan positioned proximal to the interior volume configured to force airflow across the heat sink; a capper assembly located proximal to the first edge of the one or more circuit boards, the capper assembly including at least one aperture configured to vent the interior volume; and a top cap located proximal to the second edge of the one or more circuit boards, the top cap including at least one aperture configured to vent the interior volume.

2 . The lamp of claim 1 , the heat sink including internal fins extending into the interior volume.

3 . The lamp of claim 1 , including a dome assembly located distal from the second edge, the dome assembly including a secondary circuit board having solid-state light sources.

4 . The lamp of claim 1 , including an optical transmissive shield positioned proximal to the exterior surfaces of the one or more circuit boards.

5 . The lamp of claim 4 , the optical transmissive shield including prismatic structures extending laterally from the optical transmissive shield, the prismatic structures configured to direct light emitted from the solid state light sources in an off axis direction.

6 . The lamp of claim 1 , including a lamp base at an end of the capper assembly opposite the first edge.

7 . The lamp of claim 1 , including an intermediate circuit board and a light source driver electronics supply within the capper assembly.

8 . The lamp of claim 7 , the intermediate circuit board in electrical communication with the driver electronics supply, the intermediate circuit board configured to distribute electrical power to the one or more circuit boards.

9 . The lamp of claim 8 , the intermediate circuit board including:
protruding tabs extending inwards from the intermediate circuit board; and electrical contacts extending from the first edge of the one or more circuit boards.

9 . The lamp of claim 9 , the protruding tabs and the electrical contacts mechanically bonded to form an electrical connection.

10 . The lamp of claim 1 , including a reflector between the circumferential array and the capper assembly.

11 . The lamp of claim 10 , the reflector having a reflective film coated on a first surface of the reflector.

12 . The lamp of claim 10 , the reflector formed from a diffuse material.

13 . The lamp of claim 1 , the one or more circuit boards being metal-clad printed circuit boards.

14 . The lamp of claim 1 , the one or more circuit boards being a flexible circuit board conformed to an external profile of the heat sink.

15 . The lamp of claim 1 , the SSL source being one of a light emitting diode, an organic light-emitting diode, polymer light-emitting diodes, a laser diode, and a laser.

16 . The lamp of claim 1 , the active cooling device being a fan.

Assignees

• Current Lighting Solutions Llc

Inventors

• Ramaiah Raghu
• Knapp Thomas Alexander
• Yoder Benjamin Lee
• Firis James William

Classifications

• Y02B20/30

  Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] · CPC title

• F21K9/238

  Arrangement or mounting of circuit elements integrated in the light source · CPC title

• F21K9/232 Primary

  specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb · CPC title

• F21Y2107/30

  on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section · CPC title

• F21V29/83

  the elements having apertures, ducts or channels, e.g. heat radiation holes · CPC title