Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit
Reexamination Certificate
2005-08-30
2005-08-30
Vu, David (Department: 2828)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Impedance or current regulator in the supply circuit
C315S307000, C315SDIG005, C315SDIG007
Reexamination Certificate
active
06936976
ABSTRACT:
Circuit arrangement for starting and operating discharge lamps (Lp1, Lp2) with control of the lamp current and preheating of electrode filaments. No control device is required for the sequence of the preheating, igniting and operating phases. This is achieved by a preheating resistor which changes its value after the preheating phase, in combination with controller properties according to the invention.
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patent: 6140779 (2000-10-01), Kanazawa et al.
patent: 6593703 (2003-07-01), Sun
patent: 0 845 928 (1998-06-01), None
patent: 0 930 808 (1999-07-01), None
Jinrong Qian et al., “Analysis, Design, and Experiments of a High-Power-Factor Electronic Ballast”,IEEE Transactions on Industry Applications, vol. 34, No. 3, May/Jun. 1998.
Jinrong Qian et al., “New Continuous-Input Current Charge Pump Power-Factor-Correction Electronic Ballast”,IEEE Transactions On Industry Applications, vol. 35, No. 2, Mar./Apr. 1999.
Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
Vu David
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