Cathode structure for emissive screen
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United States of America Patent
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Jul 20, 2010
Grant Date -
Dec 23, 2004
app pub date -
Feb 18, 2003
filing date -
Feb 19, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
This invention relates to a triode type cathode structure comprising, in superposition, an electrode forming a cathode (13) and supporting means made of an electron emitting material in the form of a layer (14), an electrical insulation layer (11) and a grid electrode (15), an opening (12) formed in the grid electrode and in the electrical insulation layer exposing the means made of an electron emitting material. The means made of an electron emitting material (14) are located in the central part of the opening of the grid electrode (15), this opening being in the form of a slit and the means made of an electron emitting material exposed by the slit being composed of elements aligned along the longitudinal axis of the slit.
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