Lighting system and method
A lighting system and method is disclosed wherein a sensor module controls a lighting apparatus comprising lamps that emit light having a wavelength within a first range of wavelengths. The sensor module comprises a sensor that is configured to detect light having a wavelength within a second range of wavelengths. The first and second ranges do not overlap one another. Accordingly, the sensor is blind to light from the lighting device. The sensor module controls the illumination of the lighting device in accordance with a predetermined strategy based upon the detection of a threshold intensity of light by the sensor.
1 . A lighting apparatus, comprising
a body;
a plurality of lamps on or adjacent the body, each of the lamps adapted to emit light having a wavelength within a first range of light wavelengths and not emit light having a wavelength outside the first range; and
a sensor on or adjacent the body, the sensor adapted to sense light having a wavelength within a second range of light wavelengths and not sense light having a wavelength outside the second range;
wherein the lamps are controlled in accordance with conditions sensed by the sensor.
2 . The lighting apparatus of claim 1 , wherein the first and second ranges do not overlap.
3 . The lighting apparatus of claim 2 , wherein the lamps comprise light emitting diodes.
4 . The lighting apparatus of claim 1 , wherein the apparatus is configured so that the intensity of light emitted by the lamps is controlled in accordance with the sensed condition.
5 . The lighting apparatus of claim 2 , comprising a controller, and the controller allows power to be supplied to the lamps when the sensor detects light below a predetermined intensity.
6 . The lighting apparatus of claim 5 , wherein the predetermined intensity corresponds to a level of light anticipated at dusk.
7 . The lighting apparatus of claim 5 , wherein the predetermined intensity is less than about 100 foot-candles.
8 . The lighting apparatus of claim 7 , wherein the predetermined intensity is less than about 70 foot-candles.
9 . The lighting apparatus of claim 1 , wherein the sensor is arranged so that light from the lamps impinges on the sensor.
10 . The lighting apparatus of claim 2 , wherein the sensor is adapted to detect light that is not within the visible spectrum.
11 . The lighting apparatus of claim 10 , wherein the sensor comprises an infrared photo diode.
12 . The lighting apparatus of claim 11 , wherein the second range is from about 700-900 nm.
13 . The lighting apparatus of claim 12 , wherein the sensor is adapted to detect light having a wavelength about 800 nm.
14 . An illuminated display apparatus, comprising:
a plurality of light emitting diodes (LEDs) adapted to emit only light having a wavelength within a first range of light wavelengths;
a radiation sensor adapted to detect only light radiation having a wavelength within a second range of light wavelengths that does not overlap the first range; and
a controller configured to receive inputs from the light sensor;
wherein the controller varies the intensity of light emitted by the LEDs in accordance with inputs received from the light sensor.
15 . The illuminated display apparatus of claim 14 , wherein the second range of wavelengths is not within the visible spectrum.
16 . The illuminated display apparatus of claim 14 , wherein the sensor comprises an infrared light sensor.
17 . The illuminated display apparatus of claim 16 , wherein the sensor is configured to sense radiation emitted by human body heat.
18 . The illuminated display apparatus of claim 17 , wherein the sensor is configured to sense radiation within a range of wavelengths of about 6,000 to 8,000 nm.
19 . The illuminated display apparatus of claim 17 , wherein the sensor is configured to sense an intensity of body heat that varies with proximity of the body heat source to the sensor.
20 . The illuminated display apparatus of claim 19 , wherein the controller is configured to vary the intensity of light emitted by the LEDs as the body heat source approaches the sensor.
21 . The illuminated display apparatus of claim 20 , wherein the controller is configured to increase the light intensity as the body heat source approaches the sensor.
22 . The illuminated display apparatus of claim 20 , wherein the controller is configured to decrease the light intensity as the body heat source approaches the sensor.
23 . The illuminated display apparatus of claim 19 , wherein the controller is configured to actuate a secondary effect when the sensed body heat intensity exceeds a threshold value.
24 . The illuminated display apparatus of claim 23 , wherein the secondary effect is a non-lighting effect.
25 . The illuminated display apparatus of claim 24 , wherein the secondary effect is an auditory effect.
26 . The illuminated display apparatus of claim 24 , wherein the secondary effect is a lighting effect.
27 . The illuminated display apparatus of claim 20 , wherein the display apparatus comprises a battery configured to power the LED, sensor, and controller.