Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1997-01-20
1998-06-09
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250221, 362 84, 362191, 362334, 362368, F21S 902, F21V 916, H05B 3300
Patent
active
057638721
ABSTRACT:
A night light device provides a low level illumination using electro-phosphorescent lighting which is automatically turned on when motion near the device is detected by the device and if the ambient lighting level is low. When the ambient light level is above a specified level so that it is possible to see without artificial light, the device is inactive. A high intensity lighting feature allows the device to be used as a flashlight in emergencies since the device is fastened to a wall in such a way that it is easily and quickly removed. The front face of the device provides a downwardly directed surface for projecting light toward the floor, and sideways directed surfaces for projecting light to each side. Spherical Fresnel lenses enable the device to detect motion over a 180 degree azimuth. The device may have phosphorescent doping within its case structure so as to provide a dim light even when not energized.
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Lee John R.
Westin Edward P.
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