The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2013
Filed:
Jan. 31, 2011
Louis Lerman, Las Vegas, NV (US);
Allan Brent York, Langley, CA;
Michael David Henry, Albuquerque, NM (US);
Robert Steele, Redwood City, CA (US);
Brian D. Ogonowsky, Mountain View, CA (US);
Louis Lerman, Las Vegas, NV (US);
Allan Brent York, Langley, CA;
Michael David Henry, Albuquerque, NM (US);
Robert Steele, Redwood City, CA (US);
Brian D. Ogonowsky, Mountain View, CA (US);
Quarkstar LLC, Las Vegas, NV (US);
Abstract
A solid state light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. The bottom electrodes of an array of LEDs (e.g., 500 LEDs) are bonded to an array of electrodes formed on a flexible bottom substrate. Conductive traces are formed on the bottom substrate connected to the electrodes. A transparent top substrate having conductors is then laminated over the bottom substrate. Various ways to connect the LEDs in series are described along with many embodiments. The light sheets may be formed to emit light from opposite surfaces of the light sheet, enabling it to be used in a hanging fixture to illuminate the ceiling as well as the floor. The light sheet provides a practical substitute for a standard 2×4 foot fluorescent ceiling fixture.