Kevin Yang - Chula Vista CA Chien F. Chao - Rancho Palos Verdes CA John Yu - Torrance CA Albert Peng - Long Beach CA Feng Hu - Palos Verdes Estates CA
Assignee:
Philips Electronic North America Corporation - New York NY
International Classification:
H05B 3702
US Classification:
315102
Abstract:
An electronic ballast for a fluorescent lamp includes a delay triggered circuit which, upon expiration of a predetermined period during which the lamp filaments, constituting opposite electrodes of the lamp, are preheated, applies high frequency operating voltage across the opposite electrodes of the lamp beginning with a transition from a condition of no voltage to a condition of full rated voltage which occurs within one cycle of the high frequency voltage. The sharp transition from zero "glow current" to full "arc current" at the end of the preheating period has been found to increase the life of lamps in the number of on-off starts, particularly with respect to lamps of poor quality. The rapid transition is possible because the ballast uses the same inverter and transformer for supplying preheating and operating voltages. The operating voltage is applied between the opposite electrodes of the lamp via an electronic bi-directional switch, controlled by a preheating delay RC timing circuit.
Medicine Doctors
Dr. Albert Peng, Novato CA - MD (Doctor of Medicine)
Joseph H Greenberg MD 750 Las Gallinas Ave STE 205, San Rafael, CA 94903 (415)4723903 (phone), (415)4722102 (fax)
Joseph H Greenberg MD 500 Professional Ctr Dr STE 511, Novato, CA 94947 (415)8979624 (phone), (415)4722102 (fax)
Redwood Family Dermatology 2725 Mendocino Ave, Santa Rosa, CA 95403 (707)5454537 (phone), (707)5456726 (fax)
Education:
Medical School Thomas Jefferson University, Jefferson Medical College Graduated: 1997
Procedures:
Destruction of Benign/Premalignant Skin Lesions Destruction of Skin Lesions Skin Surgery Skin Tags Removal
Conditions:
Atopic Dermatitis Dermatitis Skin Cancer Tinea Unguium Acne
Languages:
English Spanish
Description:
Dr. Peng graduated from the Thomas Jefferson University, Jefferson Medical College in 1997. He works in San Rafael, CA and 2 other locations and specializes in Dermatology. Dr. Peng is affiliated with Marin General Hospital, Santa Rosa Memorial Hospital, Sutter Health Novato Community Hospital and Sutter Santa Rosa Regional Hospital.