Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy controlled regulation of the current supply...
Patent
1978-08-18
1980-11-25
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Radiant energy controlled regulation of the current supply...
250214AL, 315156, 315307, H05B 3702
Patent
active
042361010
ABSTRACT:
In an area illuminated by both artificial and natural light sources, a control system is implemented to reduce the energy consumption by proportionately dimming the artificial sources to a level such that the sum of natural plus artificial light is held essentially constant. Use of an open loop sensing scheme allows the control system to operate over a wide range of conditions with no oscillations and good control of the total illumination level.
REFERENCES:
patent: 3449629 (1969-06-01), Wigert et al.
patent: 4122334 (1978-10-01), Owens
patent: 4135116 (1979-01-01), Smith
LaRoche Eugene R.
Lutron Electronics Co. Inc.
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