Patent ID: 6906461
Filing Date: 2005-06-14
Classification: G02F,H01J

Abstract:
1. A light source device comprising: at least one discharge tube; a discharge medium sealed inside the discharge tube; and inner and outer electrodes for exciting the discharge medium, wherein the inner electrode is arranged inside only one end of the discharge tube, the outer electrode includes a first outer electrode and a second outer electrode, the second outer electrode being connected electrically with the first outer electrode, the first outer electrode is in contact with an outer surface of the discharge tube at a plurality of first contact portions, the first contact portions being located at different distances from the inner electrode and being provided discontinuously, the second outer electrode is in contact with the outer surface of the discharge tube at second contact portions, the second contact portions are arranged closer to the inner electrode than the first contact portions at a surface density greater than that of the first contact portions, and the plurality of the first contact portions are arranged in a tube axial direction of the discharge tube.