# US 11,079,073 B2 · Tubular solid state lighting > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,073 B2 - Document ID: US11079073B2 - Status: Granted - Kind: B2 - Application number: 16/754,314 - Filed: 2018-10-05 - Published: 2020-10-01 - Granted: 2021-08-03 - Earliest claimed: 2017-10-10 - Assignees: Signify Holding B.V. - Applicants: Signify Holding B.V. - Inventors: Haimin Tao - Web page: https://patentgrep.com/patent/US11079073B2 ## CPC - H05B 45/3725: Switched mode power supply [SMPS] - F21K 9/272: Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts (F21K9/278 takes precedence) - F21K 9/278: Arrangement or mounting of circuit elements integrated in the light source - F21V 23/009: {the casing being inside the housing of the lighting device} - F21V 23/023: {Power supplies in a casing (F21V23/003 takes precedence)} - H05B 45/357: specially adapted for retrofit LED light sources - F21Y 2103/10: comprising a linear array of point-like light-generating elements - F21Y 2115/10: Light-emitting diodes [LED] - H05B 45/375: using buck topology - H05B 45/38: using boost topology - H05B 45/385: using flyback topology - Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - 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 The invention provides a tubular solid state lamp having a driver at each end each with an associated section of the solid state light source arrangement. The two drivers are for connection in series so that the mains voltage is shared between them. In this way, each end connector of the lamp holder is only required to operate at half the mains voltage so that a lower creepage distance (e.g. 2 mm) can be tolerated. ## Claims ### Claim 1 A tubular solid state lamp for connecting to a fluorescent luminaire and for direct connecting with a mains voltage, the tubular solid state lamp comprising: a first pair of connection pins at one end of the tubular solid state lamp and a second pair of connection pins at the other end of the tubular solid state lamp; a solid state light source arrangement comprising a first section and a second section; a first driver electrically coupled to the first pair of connection pins and connected to the first section of the solid state light source arrangement for driving the first section; and a second driver electrically coupled to the second pair of connection pins and connected to the second section of the solid state light source arrangement for driving the second section, wherein the first section and the second section have no electric connections between them and wherein the first driver and the second driver are externally interconnected in series so that the mains voltage is shared between them, wherein an external interconnection is provided by the fluorescent luminaire. ### Claim 2 (depends on 1) A tubular solid state lamp as claimed in claim 1, wherein the first and second drivers each comprise a switch mode power supply. ### Claim 3 (depends on 1) A tubular solid state lamp as claimed in claim 1, wherein the first and second drivers each comprise a linear driver. ### Claim 4 (depends on 1) A tubular solid state lamp as claimed in claim 1, wherein the interconnection comprises a dummy starter. ### Claim 5 (depends on 1) A tubular solid state lamp as claimed in claim 1, wherein the interconnection comprises a shorting wire. ### Claim 6 (depends on 1) A lighting installation for use in a fluorescent luminaire, comprising: a fluorescent tube lighting driver comprising an electromagnetic ballast and first and second end connectors, each end connector comprising a pair of connection terminals; and a tubular solid state lamp as claimed in claim 1 connected between the first and second end connectors. ### Claim 7 (depends on 6) A lighting installation as claimed in claim 6, wherein each end connector comprises a G13 or G5 lamp holder. ### Claim 8 (depends on 6) A lighting installation as claimed in claim 6 wherein each end connector has creepage distance of between 2 mm and 2.5 mm. ### Claim 9 (depends on 6) A lighting installation as claimed in claim 6, wherein the end connectors define a live terminal (L) in one end connector and a neutral terminal (N) in the other end connector and wherein the other two terminals are connected by a dummy starter forming the external interconnection. ### Claim 10 (depends on 1) A lighting installation for use in a fluorescent luminaire, comprising: first and second end connectors, each end connector comprising a pair of connection terminals; and a tubular solid state lamp as claimed in claim 1 connected between the first and second end connectors, wherein the end connectors define a live terminal (L) in one end connector and a neutral terminal (N) in the other end connector and wherein the other two terminals are connected by a shorting wire forming the external interconnection. ### Claim 11 (depends on 10) A lighting installation as claimed in claim 10, wherein each end connector comprises a G13 or G5 lamp holder. ### Claim 12 (depends on 10) A lighting installation as claimed in claim 10 wherein each end connector has creepage distance of between 2 mm and 2.5 mm.