(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2005/0162851 Al
Kazar et al. (43) Pub. Date: Jul. 28,2005
(54) YEAR-ROUND DECORATIVE LIGHTS WITH TIME-MULTIPLEXED ILLUMINATION OF INTERLEAVED SETS OF COLOR-CONTROLLABLE LEDS
(76) Inventors: Dennis Michael Kazar, Austin, TX
(US); John Jeffery Oskorep, Chicago,
JOHN J. OSKOREP, ESQ.
ONE MAGNIFICENT MILE CENTER
980 N. MICHIGAN AVE.
CHICAGO, IL 60611 (US)
(21) Appl. No.: 10/763,658
(22) Filed: Jan. 23, 2004
Publication Classification (51) Int. CI.7 121V 9/00
(52) U.S. C I 362 231
A decorative lighting apparatus provides user-selectable color schemes corresponding to several holidays and other occasions for year-round use. In one illustrative example, the decorative lighting apparatus includes control circuitry which has a plurality of color-control outputs for coupling to color-control terminals of each one of a plurality of colorcontrollable lights along a decorative light strand. The control circuitry is operative to illuminate the color-controllable lights with any given color scheme by repeatedly time-multiplexing color-control signals at the color-control outputs to different interleaved sets of color-controllable lights along the decorative light strand. Each color-controllable light is a Red-Green-Blue (RGB) Light-Emitting Diode (LED). Preferably, the time-multiplexing rate is sufficient such that the RGB LEDs appear to be simultaneously illuminated along the strand (e.g. 32 Hertz or greater). Advantageously, this low-cost implementation reduces the number of wires required along the decorative light strand without sacrificing versatility.