Time-variable control for lamp intensity

Details Time-variable control for lamp intensity Time-variable control for lamp intensity

1981-07-06

1983-07-26

Dixon, Harold A.

Electric lamp and discharge devices: systems

Time-controlled

315 76, 315208, H05B 3702

Patent

active

043956610

ABSTRACT:
A time-variable illumination control apparatus for a lamp permits light intensity to be gradually increased starting at a predetermined time. The intensity control includes a clock-timer to initiate time-variable power supply network. The illumination control apparatus is designed for use on mornings when a user would commonly arise before daylight. By setting the illumination control apparatus to gradually increase the light intensity of a lamp prior to awakening, the lamp simulates sunrise so that the eyes gradually adjust to the light while sleeping. Upon awakening, the eyes are fully adjusted to the light and eye discomfiture from a sudden increase in intensity is avoided.

REFERENCES:
patent: 1665412 (1928-04-01), Hall
patent: 1964846 (1934-07-01), Earnshaw
patent: 1972159 (1934-09-01), Morrison
patent: 3991343 (1976-11-01), Delpy
"Slow On/Off", Elektor, vol. 4, No. 2, Feb. 1978, pp. 2-17 to 2-19.
"Circuit of the Day", Component Report XIII, Dec. 1978, No. 6, pp. 209-211.

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