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US 9,867,244 B2Granted
Arbitrarily sizable broad-area lighting system
AssigneeCooledge Lighting Inc.
InventorsPaul Palfreyman, Paul Jungwirth, Jane Wei Yang, Michael A. Tischler
Life of this patent
Estimating the term…
Abstract
In accordance with certain embodiments, lighting systems feature lightsheets including multiple illumination units or modules electrically interconnected such that unremoved illumination units or modules remain energized upon removal of at least a portion of one or more illumination units or modules.
Claims36
A lighting system comprising:
- a lightsheet comprising:
- a substrate;
- a first power conductor disposed on the substrate;
- a second power conductor disposed on the substrate and electrically isolated from the first power conductor;
- and
- a plurality of light-emitting strings each electrically connected between and being energizable via the first and second power conductors, wherein each light-emitting string comprises a plurality of electrically connected illumination units,
- wherein each illumination unit comprises (i) one or more electrically connected light-emitting elements, and (ii) a bypass element (a) electrically connected across the first and second power conductors and (b) configured to transition from a high-impedance state to a low-impedance state and thereby complete a circuit, in the illumination unit, between the first and second power conductors upon removal of the one or more light-emitting elements of the illumination unit from the lightsheet, whereby energization of unremoved light-emitting elements within the light-emitting string is maintained.
4 more elements
A lighting system comprising:
- a lightsheet comprising:
- a substrate;
- a first power conductor disposed on the substrate;
- a second power conductor disposed on the substrate and electrically isolated from the first power conductor;
- and
- a plurality of light-emitting strings each electrically connected between and being energizable via the first and second power conductors, wherein each light-emitting string comprises a plurality of electrically connected illumination units,
- wherein each illumination unit comprises (i) one or more electrically connected light-emitting elements, and (ii) a bypass element (a) electrically connected across the first and second power conductors and (b) configured to transition from a high-impedance state to a low-impedance state and thereby complete a circuit between the first and second power conductors upon removal of the one or more light-emitting elements of the illumination unit from the lightsheet, whereby energization of unremoved light-emitting elements within the light-emitting string is maintained, and
- wherein, for at least one light-emitting string, at least one illumination unit further comprises (i) a voltage-drop element and (ii) a shunt configured to (a) prevent voltage drop across the voltage-drop element when the one or more light-emitting elements of the illumination unit are present on the lightsheet, and (b) upon removal of the one or more light-emitting elements of the illumination unit, cause a voltage drop across the voltage-drop element.
5 more elements
A lighting system comprising:
- a lightsheet comprising:
- a substrate;
- a first power conductor disposed on the substrate;
- a second power conductor disposed on the substrate and electrically isolated from the first power conductor;
- and
- a plurality of light-emitting strings each electrically connected between and being energizable via the first and second power conductors, wherein each light-emitting string comprises a plurality of electrically connected illumination units,
- wherein each illumination unit comprises (i) one or more electrically connected light-emitting elements, and (ii) a bypass element (a) electrically connected across the first and second power conductors and (b) configured to transition from a high-impedance state to a low-impedance state and thereby complete a circuit between the first and second power conductors upon removal of the one or more light-emitting elements of the illumination unit from the lightsheet, whereby energization of unremoved light-emitting elements within the light-emitting string is maintained, and
- wherein, for each illumination unit, (i) the one or more electrically connected light-emitting elements are electrically connected in series with the first power conductor, (ii) the bypass element has first and second electrical connection points, (iii) the first electrical connection point of the bypass element is electrically connected between (a) the one or more light-emitting elements of the illumination unit and (b) the one or more light-emitting elements of an adjoining illumination unit, and (iv) the second electrical connection point of the bypass element is electrically connected to the second power conductor.
5 more elements
Dependencies are inferred from the claim text.