Electric lamp and discharge devices – Cathode ray tube – Beam deflecting means
Patent
1997-10-27
1999-11-09
O'Shea, Sandra
Electric lamp and discharge devices
Cathode ray tube
Beam deflecting means
313495, 313496, 313497, H01J 162, H01J 6304, H01J 2970
Patent
active
059820861
ABSTRACT:
A picture display device has a vacuum envelope and is provided with a face plate whose inner side supports a luminescent screen, a rear wall situated at a short distance therefrom, and the space in-between accommodating a plurality of electron sources, which cooperate with a plurality of electron transport duct including dielectric walls fro transporting, through vacuum, the produced electrons towards positions at a small distance from the luminescent screen. The display device further includes means for reducing the effects of undesired charge transfer of the duct walls, which are provided to improve the start-up and/or steady state electron transport conditions. Specifically, the outer sides of the duct rear walls are provided with a conductor to which an initiation potential is applied, which is equal to or higher than the potential applied for producing the electron transport field.
De Zwart Siebe T.
Lambert Nicolaas
Trompenaars Petrus H. F.
Van Gorkom Gerardus G. P.
Haynes Mack
Kraus Robert J.
O'shea Sandra
U.S. Philips Corporation
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