Exterior illumination and emergency signaling system and related methods
AssigneeCRS Electronics
InventorScott Riesebosch
Life of this patent
Estimating the term…
Abstract
LEDs that provide street illumination are used to create emergency signals. This facilitates simple retrofitting of existing streetlighting infrastructure. In one embodiment, a streetlight comprises an LED set that itself comprises or consists of a plurality of LEDs collectively producing a white light output. The streetlight also includes a receiver for receiving a signal of an alarm condition, and a controller for (i) disabling the LED set during a daylight period, (ii) maintaining the normal operating mode during a lighting period distinct from the daylight period, and (iii) in response to the alarm condition detected by the receiver, de-activating at least one of the LEDs to produce a non-white (e.g., red or amber) output signaling the alarm condition.
Claims17
A streetlight comprising:
- an LED set comprising a plurality of LEDs all of which are active in a normal operating mode to collectively produce a white light output;
- a receiver for receiving a signal of an alarm condition;
- and a controller for (i) disabling the LED set during a daylight period, (ii) maintaining the normal operating mode during a lighting period distinct from the daylight period, and (iii) in response to the alarm condition detected by the receiver, de-activating at least one of the LEDs to produce a non-white output signaling the alarm condition.
A method of lighting comprising the steps of:
- providing, in a normal operating mode, light from a plurality of proximate LEDs, the light from the LEDs combining to produce a white light output;
- receiving a signal of an alarm condition;
- and in response to the alarm condition, de-activating at least one of the LEDs to produce a non-white output signaling the alarm condition.
Dependencies are inferred from the claim text.