Patent ID: 7161311
Filing Date: 2007-01-09
Classification: F21K,F21W,F21Y,G09G,H05B,Y02B

Abstract:
1. An apparatus, comprising: a plurality of first LEDs, each first LED configured to generate first radiation having a first spectrum; a plurality of second LEDs, each second LED configured to generate second radiation having a second spectrum different than the first spectrum; a diffuser to blend the first radiation and the second radiation, when generated, so as to provide a uniform color of light having a visible spectrum based on a combination of the first spectrum and the second spectrum; and at least one controller configured to control the first LEDs and the second LEDs based on a square wave signal applied to each LED, such that all visible light provided by the diffuser is perceived only as one or more colors, and not as alphanumeric characters or graphic images, wherein the apparatus is configured to have a form that resembles a conventional lightbulb.