Patent ID: 8030859

Claim:
A cold-cathode lamp that is supplied with electric power via first and second conductive members provided externally, comprising: an insulating tube made of a light-transmitting, electrically insulating material; a first internal electrode disposed inside the insulating tube; a second internal electrode disposed inside the insulating tube; a first external electrode disposed outside the insulating tube and connected to the first internal electrode so as to be at a same potential as the first internal electrode; a first insulating member; a first counter electrode disposed to face the first external electrode across the first insulating member; wherein the first counter electrode has a non-facing portion not facing the first external electrode; a gap between the non-facing portion of the first counter electrode and the insulating tube is filled by part of the first insulating member, and when the cold-cathode lamp is mounted for actual use, the first conductive member and the first counter electrode are electrically connected together.