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:
Mar. 14, 2000
Filed:
Jun. 16, 1998
Istvan Gorog, Lancaster, PA (US);
Richard LaPeruta, Jr, Lititz, PA (US);
Samuel Pearlman, Lancaster, PA (US);
Nitin Vithalbher Desai, Princeton Junction, NJ (US);
Wilber Clarence Stewart, Hightstown, NJ (US);
Gregory James Cohee, Newtown, PA (US);
Richard William Nosker, Princeton, NJ (US);
Pabitra Datta, deceased, late of Cranbury, NJ (US);
Danielle Helene Herford, Etters, PA (US);
Thomson Consumer Electronics, Inc.,, Indianapolis, IN (US);
Abstract
A light-absorbing matrix 23, having openings therein, is formed on an interior surface of a faceplate panel 12 of a cathode-ray tube 10 by providing a photoreceptor thereon, electrostatically charging the photoreceptor 72 to a substantially uniform level of charge, and exposing the photoreceptor to light through openings 33 in a color selection electrode 24 to selectively discharge the more intensely illuminated areas of the photoreceptor, without substantially discharging the less intensely illuminated areas. The photoreceptor 72 comprises a plurality of layers including a photoresist layer 56, a conductive layer 62, and a photoconductive layer 66. The openings 33 in the color selection electrode 24 have a dimension substantially greater than the dimension of the openings in the resultant matrix 23. The photoreceptor 72 is contacted with a liquid toner having charged pigment particles which form toner lines 84 on the less intensely illuminated areas of the photoreceptor. The photoreceptor 72 is exposed to UV radiation to selectively change the solubility of the photoresist portion 56 thereof into areas of greater and lesser solubility. The photoreceptor 72 is serially developed to expose portions of the interior surface of the panel 12, while leaving the areas of lesser solubility intact. Next, the interior surface of the panel and the areas of lesser solubility are coated with a matrix suspension which is dried to form the matrix 23. The areas of lesser solubility and the overlying light-absorbing matrix material thereon are removed, thereby forming in the matrix 23 a plurality of openings having a width less than the width of the openings 33 in the color selection electrode 24.