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    • Discharge lamp lighting control device 

      Virginia Tech Intellectual Properties, Inc.; Matsushita Electric Works, Ltd.; Lee, Fred C.; Eriguchi, Hiroyasu; Okawa, Masanao; Zhou, Jinghai; Jiang, Yan; Tran, Dung A. (United States Patent and Trademark Office, 2008-06-24)
      A discharge lamp lighting control device (100) having a DC power converter, a power factor improving power converter (1), a polarity reversing circuit (2), a starter circuit (3), and a controller (4). The power factor ...