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:
Dec. 05, 1989
Filed:
Mar. 01, 1988
Albertus A Sluyterman, Eindhoven, NL;
Nicolaas G Vink, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An electromagnetic deflection unit for use in a projection television display tube, includes: a system of line deflection coils having two oppositely located saddle coils each with their longitudinal conductor groups which are to be positioned on either side of the longitudinal axis of the display tube. At the screen-sided end the conductor groups of the oppositely located saddle coils are located at a first distance, on one side of the tube axis and on the other side they are located at a second, smaller distance from each other, whereas at the gun-sided end the situation is just the reverse. The distances at the screen-sided end are adjusted to generate a 4-pole component upon energization of the line deflection coil system, which component renders the raster to be written on the display screen trapezoidal. The distances at the gun-sided end are adjusted to generate a 4-pole component which is opposite to the 4-pole component generated in the proximity of the screen-sided end.