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:
May. 21, 1996
Filed:
Nov. 16, 1994
Stephen T Opresko, Lancaster, PA (US);
Richard LaPeruta, Jr, Lititz, PA (US);
Richard E Roland, Conestoga, PA (US);
Thomson Consumer Electronics, Inc., Indianapolis, IN;
Abstract
The present invention relates to a CRT 10 having an evacuated envelope comprising a funnel 11 sealed at one end to a faceplate panel 12 with a luminescent screen 14 on an interior surface thereof. A color selection electrode 16, mounted on a frame 19, is disposed within the envelope in proximity to the screen. An internal magnetic shield 22, is secured to the frame of the color selection electrode, and is spaced from and extends along at least a portion of the funnel. The magnetic shield has a plurality of openings 32 therethrough. An evaporable getter 28 is disposed within the envelope adjacent to the exterior surface 26 of the magnetic shield 22. The magnetic shield is improved by having tabs or louvers 36, 38, 136, 138, associated with the openings, for restricting the deposition of a film of getter material 30 to the exterior surface 26 of the shield 22. In a second embodiment, two magnetic shields 122, 222, with openings 132 and 232, respectively are attached to the frame 19 of the color selection electrode 16. The openings 132 and 232 are non-aligned, thereby restricting the getter film to the exterior surfaces to the two magnetic shields.