# US 11,445,585 B2 · Non-neutral-based, illuminated electrical load controls > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,585 B2 - Document ID: US11445585B2 - Status: Granted - Kind: B2 - Application number: 16/942,057 - Filed: 2020-07-29 - Published: 2021-09-23 - Granted: 2022-09-13 - Earliest claimed: 2020-03-20 - Assignees: Leviton Manufacturing Co., Inc. - Applicants: Leviton Manufacturing Co., Inc. - Inventors: Aleksandr Aronov; Walter Ancipiuk; Melissa Cinelli; Timothy Lindh - Web page: https://patentgrep.com/patent/US11445585B2 ## CPC - H05B 45/345: Current stabilisation; Maintaining constant current - H01H 9/161: {comprising light emitting elements} - H01H 23/025: {Light-emitting indicators} - H05B 45/37: Converter circuits - H05B 45/39: Circuits containing inverter bridges - H05B 45/59: for reducing or suppressing flicker or glow effects - H01H 9/182: {Illumination of the symbols or distinguishing marks (H01H9/181 takes precedence)} - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) ## Abstract An illuminated electrical load control is provided for controlling electrical power to a light-emitting diode (LED) lighting load. The load control includes a wall-box mounted housing, and an electrical switch assembly disposed at least partially within the housing. The switch assembly includes an actuator coupled to transition the switch assembly between an ON state, where AC current flows to the LED lighting load, and an OFF state, where current is interrupted from flowing to the LED lighting load. Further, the load control includes an illumination assembly with an indicator light to illuminate, at least in part, the load control when the switch assembly is in OFF state, and a current-limiting circuit connected across terminals of the switch assembly, and configured to limit leakage current through to the LED lighting load to below an activation current of the LED lighting load when the switch assembly is in the OFF state. ## Claims ### Claim 1 A non-neutral-based, illuminated electrical load control for controlling a source of AC electrical power to a light-emitting diode (LED) lighting load, the non-neutral-based, illuminated electrical load control comprising: a wall-box mounted housing; an electrical switch assembly disposed at least partially within the wall-box mounted housing, the electrical switch assembly comprising: an actuator coupled to transition the electrical switch assembly between an ON state and an OFF state, where AC current flows to the LED lighting load in the ON state, and is interrupted from flowing to the LED lighting load in the OFF state; and an illumination assembly associated with the electrical switch assembly, the illumination assembly comprising: an indicator light that illuminates, at least in part, the non-neutral, illuminated electrical load control when the electrical switch assembly is in the OFF state; and a current-limiting circuit configured to limit leakage current through the illumination assembly to the LED lighting load to below an activation current of the LED lighting load when the electrical switch assembly is in the OFF state and the indicator light provides illumination. ### Claim 2 (depends on 1) The non-neutral-based, illuminated electrical load control of claim 1, wherein the illumination assembly is coupled in parallel with the electrical switch assembly. ### Claim 3 A non-neutral-based, illuminated electrical load control for controlling a source of AC electrical power to a light-emitting diode (LED) lighting load, the non-neutral-based, illuminated electrical load control comprising: a wall-box mounted housing; an electrical switch assembly disposed at least partially within the wall-box mounted housing, the electrical switch assembly comprising: an actuator coupled to transition the electrical switch assembly between an ON state and an OFF state, where AC current flows to the LED lighting load in the ON state, and is interrupted from flowing to the LED lighting load in the OFF state; and an illumination assembly associated with the electrical switch assembly, the illumination assembly comprising: an indicator light that illuminates, at least in part, the non-neutral, illuminated electrical load control when the electrical switch assembly is in the OFF state; and a current-limiting circuit configured to limit leakage current through the illumination assembly to the LED lighting load to below an activation current of the LED lighting load when the electrical switch assembly is in the OFF state and the indicator light provides illumination; and wherein the electrical switch assembly further comprises: a line terminal to electrically connect to a line conductor of the source of AC electrical power; a switched terminal to electrically connect to facilitate supplying electrical power to the LED lighting load; wherein AC current flows between the line terminal and the switched terminal in the ON state, and is interrupted from flowing between the line terminal and the switch terminal in the OFF state; and wherein the current-limiting circuit is in series-electrical connection between the line terminal and the switched terminal of the electrical switch assembly. ### Claim 4 (depends on 3) The non-neutral, illuminated electrical load control of claim 3, wherein the indicator light illuminates, at least in part, the electrical switch assembly when the electrical switch assembly is in the OFF state. ### Claim 5 (depends on 4) The non-neutral, illuminated electrical load control of claim 4, wherein the indicator light backlight illuminates, at least in part, at least one of a cover or the actuator of the electrical switch assembly when the electrical switch assembly is in the OFF state. ### Claim 6 (depends on 3) The non-neutral, illuminated electrical load control of claim 3, wherein the current-limiting circuit is configured to limit leakage current through the illumination assembly to the LED lighting load to below an activation current of a driver of the LED lighting load when the electrical switch assembly is in the OFF state and the indicator light provides illumination. ### Claim 7 (depends on 3) The non-neutral, illuminated electrical load control of claim 3, wherein the current-limiting circuit limits leakage current through the illumination assembly to the LED lighting load to 2 mA or less when the electrical switch assembly is in the OFF state and the indicator light provides illumination. ### Claim 8 (depends on 3) The non-neutral, illuminated electrical load control of claim 3, wherein the current-limiting circuit limits leakage current through the illumination assembly to the LED lighting load to 0.5 mA or less when the electrical switch assembly is in the OFF state and the indicator light provides illumination. ### Claim 9 A non-neutral-based, illuminated electrical load control for controlling a source of AC electrical power to a light-emitting diode (LED) lighting load, the non-neutral-based, illuminated electrical load control comprising: a wall-box mounted housing; an electrical switch assembly disposed at least partially within the wall-box mounted housing, the electrical switch assembly comprising: an actuator coupled to transition the electrical switch assembly between an ON state and an OFF state, where AC current flows to the LED lighting load in the ON state, and is interrupted from flowing to the LED lighting load in the OFF state; and an illumination assembly coupled in parallel with the electrical switch assembly, the illumination assembly comprising: a light-emitting diode (LED) indicator light that illuminates, at least in part, the non-neutral, illuminated electrical load control when the electrical switch assembly is in the OFF state; a current-limiting circuit electrically configured to limit leakage current through the illumination assembly to the LED lighting load to below an activation current of the LED lighting load when the electrical switch assembly is in the OFF state and the indicator light provides illumination; and an AC-to-DC converter providing a DC current to the LED indicator light when the electrical switch assembly is in the OFF state and the indicator light provides illumination. ### Claim 10 A non-neutral-based, illuminated electrical load control for controlling a source of AC electrical power to a light-emitting diode (LED) lighting load, the non-neutral-based, illuminated electrical load control comprising: a wall-box mounted housing; an electrical switch assembly disposed at least partially within the wall-box mounted housing, the electrical switch assembly comprising: an actuator coupled to transition the electrical switch assembly between an ON state and an OFF state, where AC current flows to the LED lighting load in the ON state, and is interrupted from flowing to the LED lighting load in the OFF state; and an illumination assembly associated with the electrical switch assembly, the illumination assembly comprising: a light-emitting diode (LED) indicator light that illuminates, at least in part, the non-neutral, illuminated electrical load control when the electrical switch assembly is in the OFF state; a current-limiting circuit configured to limit leakage current through the illumination assembly to the LED lighting load to below an activation current of the LED lighting load when the electrical switch assembly is in the OFF state and the indicator light provides illumination; and an AC-to-DC converter providing a DC current to the LED indicator light when the electrical switch assembly is in the OFF state and the indicator light provides illumination; and wherein the current-limiting circuit further comprises a first resistor and a second resistor, the first resistor being electrically coupled between a first terminal of the electrical switch assembly and the AC-to-DC converter, and the second resistor being electrically coupled between a second terminal of the electrical switch assembly and the AC-to-DC converter. ### Claim 11 (depends on 10) The non-neutral, illuminated electrical load control of claim 10, wherein the DC current to the LED indicator light is limited by the current-limiting circuit to one 1 mA or less, and the LED indicator light has an illuminated intensity of 1000 mcd or greater, with a 5 mA DC test current to the LED indicator light. ### Claim 12 (depends on 10) The non-neutral, illuminated electrical load control of claim 10, wherein the first resistor and the second resistor are of an equal resistance. ### Claim 13 A non-neutral-based, illuminated electrical load control for controlling a source of AC electrical power to a light-emitting diode (LED) lighting load, the non-neutral-based, illuminated electrical load control comprising: a wall-box mounted housing; an electrical switch assembly disposed at least partially within the wall-box mounted housing, the electrical switch assembly comprising: an actuator coupled to transition the electrical switch assembly between an ON state and OFF state, where AC current flows to the LED lighting load in the ON state, and is interrupted from flowing to the LED lighting load in the OFF state; and an illumination assembly coupled in parallel with the electrical switch assembly, the illumination assembly comprising: a circuit board disposed within the wall-box mounted housing; an indicator light that illuminates, at least in part, the non-neutral, illuminated electrical load control when the electrical switch assembly is in the OFF state, the indicator light being coupled to the circuit board; and a current-limiting circuit configured to limit leakage current through the illumination assembly to the LED lighting load to below an activation current of the LED lighting load when the electrical switch assembly is in the OFF state and the indicator light provides illumination. ### Claim 14 (depends on 13) The non-neutral, illuminated electrical load control of claim 13, wherein the indicator light comprises a light-emitting diode (LED) indicator light, and the illumination assembly further comprises an AC-to-DC converter, the AC-to-DC converter providing a DC current to the LED indicator light coupled to the circuit board when the electrical switch assembly is in the OFF state and the indicator light provides illumination, the DC current to the LED indicator light being limited by the current-limiting circuit is 1 mA or less. ### Claim 15 (depends on 14) The non-neutral, illuminated electrical load control of claim 14, wherein the current-limiting circuit comprises a first resistor and a second resistor, the first resistor being electrically coupled between a first terminal of the electrical switch assembly and the AC-to-DC converter, and the second resistor being electrically coupled between a second terminal of the electrical switch assembly and the AC-to-DC converter, and wherein the first resistor and the second resistor are of an equal resistance. ### Claim 16 (depends on 13) The non-neutral, illuminated electrical load control of claim 13, wherein the actuator is a toggle-type actuator movable by a user to transition the electrical switch assembly between the OFF state and an ON state, and wherein the circuit board is oriented transverse to a cover of the electrical switch assembly. ### Claim 17 (depends on 16) The non-neutral, illuminated electrical load control of claim 16, wherein the circuit board includes a groove sized to receive, at least in part, a dividing wall within the housing to facilitate orienting and holding the circuit board in position within the housing over, at least in part, the dividing wall. ### Claim 18 (depends on 16) The non-neutral, illuminated electrical load control of claim 16, wherein the illumination assembly further comprises at least one electrical contact extending from the circuit board and electrically connecting the circuit board to at least one terminal of the electrical switch assembly, the electrical contact further facilitating maintaining the circuit board in position by physically contacting the at least one terminal of the electrical switch assembly. ### Claim 19 (depends on 13) The non-neutral, illuminated electrical load control of claim 13, wherein the actuator is a rocker-type actuator movable by a user to transition the electrical switch assembly between the OFF state and the ON state, and wherein the circuit board is oriented parallel to the rocker-type actuator. ### Claim 20 (depends on 19) The non-neutral, illuminated electrical load control of claim 19, wherein the circuit board includes a central opening through which one or more components of the electrical switch assembly extend. ### Claim 21 (depends on 19) The non-neutral, illuminated electrical load control of claim 19, wherein the illumination assembly further comprises a first electrical contact extending from the circuit board and electrically connecting the circuit board to a first terminal of the electrical switch assembly, and a second electrical contact extending from the circuit board and electrically connecting the circuit board to a second terminal of the electrical switch assembly.