H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/41
H05B 41/36 (2006.01) H05B 41/232 (2006.01)
Patent
CA 2024507
ABSTRACT Discharge Lamp Life And Lamp Lumen Life-Extender Module, Circuitry, And Methodology A method of extending discharge lamp life includes slowing electrode deterioration by powering the discharge lamp so that a lamp arc current having a reduced crest factor results, either by retrofitting an existing discharge lamp system with a waveform conditioning module, by powering the discharge lamp with a ballast producing a squarewave-type waveform, or by slowing deterioration of an emissive coating on a discharge lamp electrode by such means as preheating the electrode prior to use in order to bond the emissive coating on the electrode. A discharge lamp system includes a discharge lamp and components operatively coupled to the discharge lamp for supplying a lamp arc current to the discharge lamp that has a reduced crest factor and controlled lamp watt loading, such as a ballast configured to supply a lamp arc current with a waveform that is substantially a squarewave or an existing ballast retrofitted with waveform conditioning circuitry that causes the lamp arc current to have a reduced crest factor. A module is provided for retrofit purposes in order to tune an existing ballast and discharge lamp so that the crest factor is reduced.
Boyd Dudley G.
Chen Nian
Kanaga Valiant G.
Price Edward G.
National Energy Research Corp.
Smart & Biggar
LandOfFree
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