Variable LED Light Illumination

摘要

Improvements in lighting are disclosed where the light uses PWM to gradually increase the illumination to reduce illumination shock as the lighting abruptly changes. PWM essentially changes illumination by using square waves where the width of the square wave is adjusted to vary the amount of visible illumination. The frequency of the pulse must be sufficiently fast enough to eliminate visible pulsation. The lighting is designed in lengths of one and two feet long where the one or two foot sections that can be daisy chained together to increase to decrease the length to fit the application. The LED's can be a single color of white or blue or can be a tri-color LED that can create nearly any desired color or variable color that can create an appearance of a sunrise or sunset.

主权项

1. A variable LED light comprising:
a plurality of LED's; a pulse width modulated circuit that gradually alters the perceived brightness of said plurality of LED's, and wherein said altering of said brightness is by increasing said perceived brightness from completely off to a first desired level of brightness over an adjustable first duration of time, and by altering said perceived brightness from said first desired level of brightness to a second desired level of brightness over an adjustable second duration of time.