Goldeneye granted wavelength conversion patent

Jan. 30, 2007
Goldeneye has been granted a patent covering technology that enables wavelength conversion within light-recycling cavities.
Goldeneye, a Carlsbad, CA, company that has developed light recycling technology for high brightness LED light sources, has been granted US patent number 7,040,774. The patent is entitled "Illumination Systems Utilizing Multiple Wavelength Light Recycling."

The technology described in the patent provides a unique method for incorporating wavelength conversion materials into Goldeneye’s light recycling cavities to produce white, yellow, green, red and a spectrum of visible colors from blue or ultraviolet LEDs.

In Goldeneye’s basic technology, multiple LEDs are combined in a "light-recycling cavity" to enhance their individual brightness output. In this arrangement, the individual LEDs can operate at lower drive levels with improved optical efficiency, unlike other high brightness approaches that rely on overdrive conditions. The result is a light source with a longer lifetime, greater wavelength stability and very high color uniformity.

"This [new] patent further illustrates the novelty of Goldeneye's recycling optical approach," says Scott Zimmerman, Vice President of Technology for Goldeneye. "In particular, it allows for higher efficiency, better color rendering, and higher luminance white light sources than can be obtained using other approaches."

Zimmerman says that the patent adds to Goldeneye's already strong IP portfolio, enhancing the company’s ability to manufacture and license technology in virtually all solid-state lighting applications.

In addition to the potential for white light sources, the incorporation of wavelength conversion materials into the recycling cavity can be used to produce high brightness light sources "tuned" to desirable wavelengths. These will provide projection display makers with unmatched color replication on the screen. The light recycling principle ensures that such high brightness light sources will operate at greater efficiency than in other conversion schemes.