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:
Aug. 24, 1982
Filed:
Feb. 05, 1979
Piet G Barten, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
Because the deflection fields in color television display tubes on the display screen side often have a pin-cushion-shaped and barrel-shaped field distribution, a defocusing of the electron beams occurs upon deflection. By forming the barrel-shaped deflection field on the display screen side of the display tube so as to be pin-cushion-shaped on the neck side near each electron beam and simultaneously deforming the deflection field which is pin-cushion-shaped on the display screen side of the display tube so as to be barrel-shaped on the neck side near each electron beam, the effects of said defocusing of the electron beams as a result of the deflection are considerably reduced. The haze occurring in the vertical direction is also reduced.