LED lighting apparatus with first and second colour LEDs
First Claim
Patent Images
1. A light engine comprising:
- a printed circuit board; and
a plurality of LED groups on said printed circuit board coupled between a power supply input and a respective one of a plurality of return paths associated with said LED group;
each of said LED groups comprising a plurality of LED sets coupled in parallel;
each of said LED sets comprising a plurality of LEDs coupled in series;
wherein a first one of said LED groups is comprised of at least a subset of LEDs having a first colour, and a second one of said LED groups is comprised of at least a subset of LEDs having a second colour different from said first colour;
wherein at least one of said LEDs having a first colour from said first LED group and at least one of said LEDs having a second colour from said second LED group are intertwined on said light engine.
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Abstract
A LED based lighting apparatus is disclosed. The light engine used in the lighting apparatus may use printed circuit board and have a plurality of LED groups that are independently controllable by a control unit. The power supply input and return paths connected to each LED group may be implemented on different layers to allow a compact footprint that may be used with traditional fluorescent encasements with relatively little modification. The LEDs may comprise a subset of LEDs having a first color and a subset of LEDs having a second color different from said first color intertwined on the light engine.
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Citations
20 Claims
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1. A light engine comprising:
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a printed circuit board; and a plurality of LED groups on said printed circuit board coupled between a power supply input and a respective one of a plurality of return paths associated with said LED group;
each of said LED groups comprising a plurality of LED sets coupled in parallel;
each of said LED sets comprising a plurality of LEDs coupled in series;
wherein a first one of said LED groups is comprised of at least a subset of LEDs having a first colour, and a second one of said LED groups is comprised of at least a subset of LEDs having a second colour different from said first colour;
wherein at least one of said LEDs having a first colour from said first LED group and at least one of said LEDs having a second colour from said second LED group are intertwined on said light engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light engine comprising:
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a printed circuit board; and a plurality of LED groups on said printed circuit board coupled between a respective one of a plurality of power supply inputs associated with said LED group and a return path;
each of said LED groups comprising a plurality of LED sets coupled in parallel;
each of said LED sets comprising a plurality of LEDs coupled in series;
wherein a first one of said LED groups is comprised of at least a subset of LEDs having a first colour, and a second one of said LED groups is comprised of at least a subset of LEDs having a second colour different from said first colour;
wherein at least one of said LEDs having a first colour from said first LED group and at least one of said LEDs having a second colour from said second LED group are intertwined on said light engine. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A lighting apparatus comprising:
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an optics section; and at least one light engine comprising;
a printed circuit board; and
a plurality of LED groups on said printed circuit board coupled between a power supply input and a respective one of a plurality of return paths associated with said LED group;
each of said LED groups comprising a plurality of LED sets coupled in parallel;
each of said LED sets comprising a plurality of LEDs coupled in series;
wherein a first one of said LED groups is comprised of at least a subset of LEDs having a first colour, and a second one of said LED groups is comprised of at least a subset of LEDs having a second colour different from said first colour;
wherein at least one of said LEDs having a first colour from said first LED group and at least one of said LEDs having a second colour from said second LED group are mounted so that the light emitted from said LEDs overlaps before reaching the optics section of said lighting apparatus. - View Dependent Claims (20)
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Specification