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:
Dec. 20, 2011
Filed:
Dec. 12, 2007
Michael R. Krames, Los Altos, CA (US);
Gerd Mueller, San Jose, CA (US);
Oleg Borisovich Shchekin, San Francisco, CA (US);
Mark Pugh, Los Gatos, CA (US);
Gerard Harbers, Sunnyvale, CA (US);
John E. Epler, San Jose, CA (US);
Serge Bierhuizen, Santa Rosa, CA (US);
Regina Mueller-mach, San Jose, CA (US);
Michael R. Krames, Los Altos, CA (US);
Gerd Mueller, San Jose, CA (US);
Oleg Borisovich Shchekin, San Francisco, CA (US);
Mark Pugh, Los Gatos, CA (US);
Gerard Harbers, Sunnyvale, CA (US);
John E. Epler, San Jose, CA (US);
Serge Bierhuizen, Santa Rosa, CA (US);
Regina Mueller-Mach, San Jose, CA (US);
Philips Lumileds Lighting Company, LLC, San Jose, CA (US);
Abstract
Low profile, side-emitting LEDs are described that generate white light, where all light is emitted within a relatively narrow angle generally parallel to the surface of the light-generating active layer. The LEDs enable the creation of very thin backlights for backlighting an LCD. In one embodiment, the LED emits blue light and is a flip chip with the n and p electrodes on the same side of the LED. Separately from the LED, a transparent wafer has deposited on it a red and green phosphor layer. The phosphor color temperature emission is tested, and the color temperatures vs. positions along the wafer are mapped. A reflector is formed over the transparent wafer. The transparent wafer is singulated, and the phosphor/window dice are matched with the blue LEDs to achieve a target white light color temperature. The phosphor/window is then affixed to the LED.