Patent ID: 6636004
Filing Date: 2003-10-21
Classification: H01J

Abstract:
A discharge lamp having a discharge vessel, containing a discharge medium, an electrode arrangement with at least one anode (1, 6, 7, 12, 13, 17, 25, 29, 32) and at least one cathode (3, 4, 9, 10, 15, 19, 22, 24, 26, 30, 31), which define a small discharge spacing (b) of 3 mm or less, and having a dielectric layer between at least the anode (1, 6, 7, 12, 13, 17, 25, 29, 32) and the discharge medium, characterized in that at least two separately operable electrode groups (1, 2, 5-8, 11, 12; 2-5, 8-11; 13, 14, 16-18; 14-16, 18-20; 26, 27; 26, 27, 28) are provided in the case of at least one (2-5, 8-11, 14-16, 18-20, 26, 27, 28) of which the small discharge spacing (b) is present, and which differ from one another with reference to the discharge spacing (b).