The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 1998
Filed:
Dec. 21, 1994
Petrus Franciscus Bongaerts, Waalre, NL;
Jacob Bruinink, Eindhoven, NL;
Adrianus Leonardus Burgmans, Eindhoven, NL;
Henri Roger Van Helleputte, Eindhoven, NL;
Babar Ali Khan, Ossining, NL;
Karel Elbert Kuijk, Dommelen, NL;
Thomas Stanley Buzak, Beaverton, OR (US);
Kevin John Ilcisin, Beaverton, OR (US);
Paul Christopher Martin, Vancouver, WA (US);
Philips Electronics North America Corp., Tarrytown, NY (US);
Tektronix, Inc., Wilsonville, OR (US);
Abstract
A plasma-addressed electro-optic display device having a layer of electro-optic material, data electrodes coupled to the electro-optic layer and adapted to receive data voltages for activating portions of the electro-optic layer, and a plurality of plasma channels extending generally transverse to the data electrodes for selectively switching on the electro-optic portions. The plasma channels each contain spaced elongated cathode and anode plasma electrodes and an ionizable gas filling. To improve performance, reliability and lifetime of the device, at least the cathode electrodes have surface portions of a negative electron affinity material. Preferably, the negative electron affinity material is a film of conductive or semiconductive diamond, diamond-like carbon, or aluminum nitride.