H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/14 (2006.01) H05B 41/24 (2006.01) H05B 41/38 (2006.01)
Patent
CA 2609752
A ballast for operating a high intensity discharge (HID) lamp includes a mechanism which provides electrical power to the lamp and a frequency-selecting mechanism which selects a frequency of the electrical power based on an atomic component present in the lamp. Preferably, the frequency is selected within a range between 200 kilohertz and 900 kilohertz. Preferably, the frequency is near 200 kilohertz and the operation enhances radiant efficiency at blue-green wavelengths due to excitation states of: scandium, indium, thallium and rare earth elements. Preferably, when the operation frequency is near 700 kilohertz, the operation enhances radiant efficiency at red wavelengths due to excitation states of atomic components selected from alkali metals. Preferably, the ballast includes a dimming mechanism for dimming the lamp thereby reducing said electrical power, and upon the dimming, the frequency-selecting mechanism selects the frequency for optimizing color parameters and luminous flux of the radiant emission.
Yakub Yuri
Yanai Yigal
Integral Ip
Metrolight Ltd.
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