Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Patent
1992-05-29
1993-12-21
Pascal, Robert J.
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
313422, 313495, 313302, 3151693, 345 10, G09G 310
Patent
active
052724190
ABSTRACT:
A flat, visible display device includes a backing plate and electrode, cathode wires extending parallel thereto, a face plate with a phosphorescent screen, an anode electrode, and an address plate with first and second addressing electrodes arranged in a crossing matrix pattern to selectively scan electrons. A first accelerating electrode is installed parallel to the same to form a thermal electron output section. Thermal electrons are accelerated to the electric field of the accelerating electrode to which a positive voltage is applied to form a space charge cloud of free electrons between the address plate and the accelerating electrode. The first and second addressing electrodes are selectively supplied with voltage to pass electrons through the apertures of the address plate to form a picture on the screen. The second addressing electrode is supplied with positive voltage, and backing and cut-off electrodes are supplied with a negative voltage to form a preliminary space charge cloud of free electrons. The second addressing electrode is supplied with zero voltage and the cut-off electrode is supplied with a positive voltage during blanking. The first addressing electrode is biased by zero volts or a negative potential for the space charge cloud to be moved to a thermal electron-generating section. After blanking, the cut-off electrode is supplied with negative voltage and at the same time, the second addressing electrode is supplied with a positive voltage to maintain the preliminary space charge cloud.
REFERENCES:
patent: 4719388 (1988-01-01), Oess
patent: 4794306 (1988-12-01), Tischer et al.
patent: 4841194 (1989-06-01), Kishino et al.
Pascal Robert J.
Samsung Electron Devices Co. Ltd.
Shingleton Michael B.
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