Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit
Patent
1995-07-13
1997-07-08
Pascal, Robert
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
315107, 315337, 313613, 313623, 313242, 313292, 313580, H01J 1702
Patent
active
056464878
ABSTRACT:
The present invention is to provide a gas discharge tube which is properly lighted to improve the reproducibility of a satisfactory light emission state. The gas discharge tube includes an envelop for accommodating a hot cathode for emitting thermoelectrons, an anode for receiving the thermoelectrons, a focusing electrode having a focusing opening for converging paths of the thermoelectrons, and a discharge shielding member supporting the focusing electrode and the anode, the discharge shielding member further supporting a cathode box for surrounding the hot cathode while being electrically insulated from the focusing electrode. Since a lighting device for the gas discharge tube sets the focusing electrode to a zero or negative potential while an electric field is generated between the hot cathode and the anode, the lighting device will be certainly turned on.
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Ikedo Tomoyuki
Ito Yoshinobu
Matui Ryotaro
Hamamatsu Photonics K.K.
Kinkead Arnold
Pascal Robert
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