Lighting fixture

Abstract

Abstract PURPOSE:To eliminate the ununiformity of the light emission of a discharge tube to obtain a high luminance and a long life time by providing several series of electrodes along the length of the discharge tube and arranging them so as be respective electrodes of the adjacent series do not lie on a same circle to each other in the peripheral direction. CONSTITUTION:A series 2A of electrodes consisting of several electrodes, for example coil electrodes divided into 2-8 pieses 2a, 2b...2n, is arranged along the length of a discharge tube 1 on the outer periphery. And another series 2B of electrodes consisting of electrodes divided into several pieces 2a, 2b...2n similar to the electrode series 2A is arranged so as to face to the electrode series 2A in radial direction. Here, the respective electrodes of adjacent electrode series 2A and 2B are arranged so as they do not lie on the same circle along the length of the discharge tube 1. That is, for example the electrode 2a of the said series 2A is arranged facing to the connecting portion between The electrode 2a and 2b of the said series 2B on the discharge tube 1. Thereby a lighting fixture of high luminance and long life time without ununiformity of light emission can be obtained.

Inventors

• 👤 Katsuya Oikawa
• 👤 克哉 及川
• 👤 Hidemi Egami
• 👤 江上　秀己
• 👤 Katsuo Saito
• 👤 勝雄 斉藤

Bibliographic Details