Electric lamp and discharge devices – Cathode ray tube – Beam deflecting means
Patent
1994-10-03
1996-07-02
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Beam deflecting means
313495, 313258, 313292, H01J 1942
Patent
active
055325483
ABSTRACT:
A flat panel display includes a faceplate and an opposing backplate. The two are sealed together and a sealed envelope is created that includes an active area of length L.sub.1. The active layer includes addressable pixels on the faceplate. Spacers are perpendicular to the faceplate and backplate. The length of a spacer is in a direction parallel to the plane of the faceplate. At least one spacer is positioned in the envelope and provides rigidity to the display. This is required because of the high vacuum which is maintained within the envelope. One or more electrodes are formed on an exterior surface of the spacer. The electrodes extend a length of L.sub.2 along a side of the spacer that is at least equal to L.sub.1. Voltages applied to the electrodes are controlled to achieve a desired voltage distribution between the backplate and the faceplate. The electrode is made of a material with a sheet resistance of less than about 10.sup.5 to 10.sup.7 .OMEGA./.quadrature.. The potential drop across the spacer between the faceplate and the backplate can be tailored by the selection of the position of the electrodes on the spacers, as well as the potentials applied to the electrodes. An additional way of tailoring the potential drop is selecting a desired thickness or conductivity of the spacer from top to bottom.
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Curtin Christopher J.
Field John E.
Morris David L.
Spindt Christopher J.
O'Shea Sandra L.
Patel Ashok
Silicon Video Corporation
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