This invention describes a device that creates white light by combining light from two different sources. One source is a solid-state light, like an LED, which is mounted on a frame and encased. The claims specify this solid-state light often emits blue light, which then mixes with light from a second source, possibly a glowing material, to create white light.
Why it matters: The core technology of generating white light using solid-state sources and phosphors, as described, has become highly efficient and inexpensive since 2004, removing previous cost and performance barriers for such devices.
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