# US 11,112,065 B2 · Solid state lamp for retrofit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,112,065 B2 - Document ID: US11112065B2 - Status: Granted - Kind: B2 - Application number: 16/999,766 - Filed: 2020-08-21 - Published: 2020-12-03 - Granted: 2021-09-07 - Earliest claimed: 2015-09-21 - Assignees: Current Lighting Solutions, LLC - Applicants: Current Lighting Solutions, LLC - Inventors: Raghu Ramaiah; Thomas Alexander Knapp; Benjamin Lee Yoder; James William Firis - Web page: https://patentgrep.com/patent/US11112065B2 ## CPC - F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb - F21K 9/238: Arrangement or mounting of circuit elements integrated in the light source - F21V 29/67: characterised by the arrangement of fans - F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes - F21Y 2107/30: on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section - F21Y 2115/10: Light-emitting diodes [LED] - Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## 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. ## Claims ### Claim 1 A solid state lamp comprising: one or more circuit boards configured as a circumferential array defining an interior volume of the 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 interior to the circumferential array and including internal fins extending into the interior volume, the heat sink having one or more external faces in thermal communication with the interior surface of the one or more circuit boards; an active cooling device 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 dome assembly located proximal to the second edge, the dome assembly being substantially flat on top and including a secondary circuit board having solid-state light sources, the secondary circuit board including at least one aperture to allow air to pass through into the interior volume. ### Claim 2 (depends on 1) The lamp of claim 1, including a lamp base at an end of the capper assembly opposite the first edge. ### Claim 3 (depends on 1) The lamp of claim 1, including driver electronics within the capper assembly. ### Claim 4 (depends on 3) The lamp of claim 3, further including an intermediate circuit board within the capper assembly, the intermediate circuit board in electrical communication with the driver electronics, the intermediate circuit board configured to distribute electrical power to the one or more circuit boards. ### Claim 5 (depends on 4) The lamp of claim 4, 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. ### Claim 6 (depends on 1) The lamp of claim 1, including a reflector between the circumferential array and the capper assembly. ### Claim 7 (depends on 6) The lamp of claim 6, the reflector having a reflective film coated on a first surface of the reflector. ### Claim 8 (depends on 1) The lamp of claim 1, the one or more circuit boards being metal-clad printed circuit boards. ### Claim 9 (depends on 1) 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. ### Claim 10 (depends on 1) 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. ### Claim 11 (depends on 1) The lamp of claim 1, the active cooling device being a fan. ### Claim 12 (depends on 1) The lamp of claim 1, wherein the lamp fits the form function of ANSI BT/ED17, BT/ED23.5, BT/ED28, BT/ED37, ED28, or BT56. ### Claim 13 A lamp comprising: one or more circuit boards configured as a circumferential array defining an interior volume of the 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 interior to the circumferential array and including internal fins extending into the interior volume, the heat sink having one or more external faces in thermal communication with the interior surface of the one or more circuit boards; an active cooling device 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 dome assembly located proximal to the second edge, the dome assembly being substantially flat on top and including a secondary circuit board having solid-state light sources, the secondary circuit board including at least one aperture to allow air to pass through into the interior volume, wherein the dome assembly includes at least one vent for air flow into the interior volume. ### Claim 14 (depends on 13) The lamp of claim 13, further comprising driver electronics within the capper assembly. ### Claim 15 (depends on 13) The lamp of claim 13, wherein the lamp fits the form function of ANSI BT/ED17, BT/ED23.5, BT/ED28, BT/ED37, ED28, or BT56. ### Claim 16 A lamp comprising: one or more circuit boards configured as a circumferential array defining an interior volume of the 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 interior to the circumferential array and including internal fins extending into the interior volume, the heat sink having one or more external faces in thermal communication with the interior surface of the one or more circuit boards; an active cooling device 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 driver electronics within the capper assembly; and a dome assembly located proximal to the second edge, the dome assembly including a secondary circuit board having solid-state light sources, the secondary circuit board including at least one aperture to allow air to pass through into the interior volume. ### Claim 17 (depends on 16) The lamp of claim 16, wherein the dome assembly being substantially flat on top.