Patent ID: 9374856
Filing Date: 2016-06-21
CPC Classification: F21S,F21V,F21Y,H02H,H05B

Claim Text:
1. An under-cabinet luminaire adapted to be mounted near a wall comprising: a housing adapted to fit under a cabinet with a power connector mounted on said housing; said housing containing a printed wiring board holding an array of LEDs and a switch-mode power supply having a power factor of greater than 90% configured to supply DC power to said printed wiring board and said array of LEDs; said printed wiring board containing a power control circuit with a dimmer circuit for controlling said array of LEDs, said power control circuit configured to supply a predetermined constant current to said array of LEDs as controlled by said dimmer circuit; a translucent light diffuser mounted on said housing adapted to provide focused light from said array of LEDs over a working area under a cabinet; wherein said array of LED's contains at least 56 LEDs arranged into 7 electrically parallel rows, each row having 8 LEDs in series to replace a F13T5 fluorescent tube; wherein lenses of LEDs in said array of LEDs are configured so that an inner row of said array near the wall has a 30 degree light spread and an outer row of said array away from the wall has a 60 degree light spread; a ferrite transformer in said switch mode power supply having the following windings: a first winding of 18 turns being on an EFD15 magnet core of 0.15 mm enamel coated wire; a second winding of 135 turns being on said magnet core of 0.2 mm enamel coated wire; a third winding of 32 turns being on said magnet core of three 0.2 mm enamel coated wires.