Patent ID: 7786664
Filing Date: 2010-08-31
Classification: H01J

Abstract:
1. A plane display device in which a cathode panel having a plurality of electron emitting areas provided therein, and an anode panel having phosphor layers and an anode electrode provided therein are joined to each other in their peripheral portions, and a space defined between said cathode panel and said anode panel is kept at a vacuum, said plane display device, comprising: a supporting body containing the cathode panel and the anode panel and having a supporting body hole extending therethrough; a hollow exhaust tube made of a conductive material, said exhaust tube having a first end portion, a second end portion and an intermediate portion disposed between and integrally connected to the first and second end portions, the first end portion being disposed internally of the supporting body and in communication with the space, the second end portion disposed exteriorly of the supporting body and the intermediate portion being disposed in the supporting body hole and in contact with the supporting body; and an elastic member made of a conductive material; wherein said exhaust tube and said anode electrode are electrically connected to each other through said elastic member disposed in said space with one end of the elastic member being in electrical contact with the anode electrode and an opposite end of the elastic member being in electrical contact with the first end portion of the exhaust tube; and a predetermined voltage is applied to said anode electrode through said exhaust tube and said elastic member such that the predetermined voltage drops in series through the second end portion, the intermediate portion, the first end portion of the exhaust tube and then to the elastic member.