# US 2018/0320832 A1 · Non-etched wiring board for LED applications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0320832 A1 - Document ID: US20180320832A1 - Status: Published application - Kind: A1 - Application number: 15/973,922 - Filed: 2018-05-08 - Published: 2018-11-08 - Earliest claimed: 2017-05-08 - Assignees: Ledvance GmbH - Applicants: LEDVANCE GmbH - Inventors: Bernhard Rieder; Christoph Strauss; Florian Wagner; Xiongqiang He - Web page: https://patentgrep.com/patent/US20180320832A1 ## CPC - F21K 9/278: Arrangement or mounting of circuit elements integrated in the light source - F21K 9/27: Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes - H05K 1/0296: {Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295 (H05K1/11 takes precedence; lay-out adapted to mounted component configuration H05K1/18)} - H05K 1/181: associated with surface mounted components - F21Y 2103/10: comprising a linear array of point-like light-generating elements - F21Y 2115/10: Light-emitting diodes [LED] - H05B 45/3725: Switched mode power supply [SMPS] - H05K 2201/09063: Holes or slots in insulating substrate not used for electrical connections - H05K 2201/09227: Layout details of a plurality of traces, e.g. escape layout for Ball Grid Array [BGA] mounting - H05K 2201/09236: Parallel layout - H05K 2201/09709: Staggered pads, lands or terminals; Parallel conductors in different planes - H05K 2201/10022: Non-printed resistor - H05K 2201/10106: Light emitting diode [LED] - H05K 2201/10522: Adjacent components - H05K 2201/10651: Component having two leads, e.g. resistor, capacitor - Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - 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 - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - 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 - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A light engine for a tube lamp has a substrate defining a longitudinal direction, having at least three conductive traces extending in the longitudinal direction. At least two of the conductive traces are divided into a plurality of trace sections. The light engine further includes a plurality of semiconductor light emitting elements, each light emitting element having two electric terminals and being arranged perpendicular to the longitudinal direction and electrically connected with a first electric terminal to one of the conductive traces and with a second electric terminal to another one of the conductive traces. ## Claims ### Claim 1 A light engine for a tube lamp, comprising a substrate defining a longitudinal direction, having at least three conductive traces extending in the longitudinal direction, wherein at least two of the conductive traces are divided into a plurality of trace sections; a plurality of semiconductor light emitting elements, each of the light emitting element having two electric terminals, wherein each of the light emitting elements is arranged perpendicular to the longitudinal direction (L) and is electrically connected with a first electric terminal to one of the conductive traces and with a second electric terminal to another one of the conductive traces. ### Claim 2 (depends on 1) The light engine according to claim 1, wherein a first conductive trace of the conductive traces is divided into a first plurality of trace sections at a first set of longitudinal positions, wherein a second conductive trace of the conductive traces is divided into a second plurality of trace sections at a second set of longitudinal positions, wherein the longitudinal positions of the first set are different from the longitudinal positions of the second set. ### Claim 3 (depends on 1) The light engine according to claim 1, wherein each trace section comprises a proximal portion and a distal portion, wherein each of the light emitting elements is electrically connected with a first electric terminal to the proximal portion of the trace section of one of the conductive traces and with a second electric terminal to the distal portion of the trace section of another one of the conductive traces. ### Claim 4 (depends on 1) The light engine according to claim 1, wherein the light emitting elements are arranged in groups of electrically parallel light emitting elements. ### Claim 5 (depends on 4) The light engine according to claim 4, wherein each trace section comprises a proximal portion and a distal portion, wherein the light emitting elements of each group are electrically connected with their respective first electric terminals to the proximal portion of the trace section of one of the conductive traces and with their respective second electric terminals to the distal portion of a trace section of another one of the conductive traces. ### Claim 6 (depends on 1) The light engine according to claim 1, wherein the trace sections of the divided conductive traces, apart from the respective first and last trace section of the divided conductive traces, each have the same length. ### Claim 7 (depends on 6) The light engine according to claim 6, wherein the ratio of the distance of a gap between two trace sections of a first conductive trace of the conductive traces from a neighboring gap in proximal direction between two trace sections of a second conductive trace of the conductive traces to the distance of the gap between two trace sections of the first conductive trace from the neighboring gap in distal direction between two trace sections of the second conductive trace is approximately between ⅓ and 3. ### Claim 8 (depends on 1) The light engine according to claim 1, wherein the trace sections of a conductive trace are separated from each other by punched holes. ### Claim 9 (depends on 1) The light engine according to claim 1, wherein one of the conductive traces has a width that is smaller than the width of the other conductive traces. ### Claim 10 (depends on 1) The light engine according to claim 1, further comprising at least one zero-ohm resistor arranged perpendicular to the longitudinal direction and electrically connected with a first electric terminal to one of the conductive traces and with a second electric terminal to another one of the conductive traces. ### Claim 11 (depends on 1) A tube lamp comprising the light engine according to claim 1.