U.S. Philips Corporation

Philips Electronics N.a. Corporation

Edward C Cosman

Edwin A Montie

Nicolaas Lambert

Siebe Tjerk De Zwart

Petrus H Trompenaars

Theunis S Baller

William N Osborne

Petrus J Prinsen

Antonius J Rademakers

A method for providing a resistive focusing lens structure for an electron beam device including forming a suspension of particles of a mixture of, by weight, of about 33-50% of an oxidic conductive material including about 40-60% of a lead ruthenate, about 25-38% of a lead titanate and about 2-15% of a ruthenium oxide, and of about 50-67% of a glass including about 30-40% of silicon dioxide (SiO.sub.2), about 3-7.5% alumina (Al.sub.2 O.sub.3), and about 53-67% of lead oxide (PbO) in a suspending medium consisting essentially of a non-acidic liquid having a boiling point of less than 150.degree. C., applying the suspension to an inside surface of a glass member to thereby provide a coating of the particles on the inside surface, firing the coating at a temperature of 700-900.degree. C. and before of after firing the coating, patterning the coating. The present method provides highly reproducible resistive focusing lens structures.

Method for providing a resistive lens structure for an electron beam

A display device comprising electron-transport ducts having entrance apertures for electrons and means for generating electrons and injecting electrons into the transport ducts via the entrance apertures. Measures have been taken to improve the picture quality. For example, the location of the entrance aperture is not the same for each transport duct, but instead shows a variation. This enables an improved control of the electron flow in the transport ducts to be achieved; in particular crosstalk between the transport ducts can be reduced.

Display device of the flat-panel type comprising an electron transport

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Eindhoven, Netherlands

Edward C Cosman