Patent ID: 6392345
Filing Date: 2002-05-21
Classification: H01J

Abstract:
A high pressure discharge lamp comprising:a vessel made of a non-conductive material which forms an inner space filled with an ionizable light-emitting material and a starting gas, said vessel having an opening portion at one end thereof; a tubular member arranged at said opening portion of the vessel and having an outer diameter which is substantially the same as an inner diameter of said opening portion; an electrode unit inserted into said tubular member and having an outer diameter which is smaller than an inner diameter of said tubular member; a stopper arranged between said tubular member and said electrode unit and having an outer diameter which is substantially the same as said inner diameter of said tubular member, said stopper having a hole through which said electrode unit is inserted, said hole of the stopper being defined by an inner surface that contacts said electrode unit directly; and a frit seal filled in a gap which is formed by said tubular member, said stopper and said electrode unit, with said stopper defining an inner end position of said frit seal in said tubular member.