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:
May. 07, 2013
Filed:
Feb. 07, 2011
William Hamburgen, Palo Alto, CA (US);
Ken Foo, Santa Clara, CA (US);
William Hamburgen, Palo Alto, CA (US);
Ken Foo, Santa Clara, CA (US);
Google Inc., Mountain View, CA (US);
Abstract
A backlight for providing light to a computer-controlled display device, includes a plurality of first light sources, a plurality of second light sources, and a light guide panel (LGP). The LGP has at least one edge and a surface facing a display surface of the display device and is adapted for guiding light emitted by, and received from, the first and second light sources at one or more edges of the LGP to the surface of the LGP. The first light sources include first light emitting diodes (LEDs) having a peak emission wavelength of greater than 500 nm. The second light sources include second LEDs having a peak emission wavelength of less than 480 nm and phosphor material that absorbs a portion of light emitted from the second LEDs and converts the absorbed light into light emitted from the phosphor material having a peak emission wavelength greater than 500 nm.