LED compensation circuit

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A warning signal light according to the principles of the invention is indicated generally herein as numeral 10.
FIGS.
1 and 2 depict light bar 70 mounted to an emergency vehicle 104.
Light bar 70 includes base 72, mounting means 74, cover 82, and warning signal lights 10.
Also included in light bar 70 may be gyrators 90 used to impart motion to warning signal lights 10.
Referring to FIG.
4, warning signal light 10 comprises light support 12, light sources 30, controller 50 (shown in FIG.
6), and connecting portion 40 for attaching the warning signal light 10 to light bar 70 or gyrator 90.
The warning signal light 10 operates to create a warning signal for use by an emergency vehicle 104 by selectively activating light sources 30 using controller 50.
Alternatively, warning signal light 10 may be formed of a solitary LED light source 30.
Light sources 30 are preferably light emitting diodes (LED's) and are generally arranged in modules formed of groups of LED's as shown in FIG.
15.
Each of the light emitting diodes (LED's) may have shoulder portion 38 adjacent LED support 12 and dome 36.
LED's 30 are situated to be in electric communication with controller 50 and a power supply, a battery, or power source.
The use of light emitting diodes (LED's) to replace traditional halogen, incandescent, or gaseous discharge xenon lamps reduces heat generation, current draw, and electromagnetic emissions, while increasing lamp life and producing a more true output light color.
The controller 50 is used to selectively activate one or more individual LED's 30, to illuminate any number of a plurality of visually distinct types of warning light signals at any moment; to illuminate more than one of a plurality of visually distinct types of warning light signals simultaneously at any moment; to illuminate one of a plurality of combinations or patterns of visually distinct warning light signals at any moment, or over any desired period of time, or to illuminate more than one of a plurality of combinations or patterns of visually distinct warning light signals over any desired period of time