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. 09, 2004
Filed:
Oct. 02, 2002
Applicant:
Inventor:
Bernd Fey, Villingen-Schwenningen, DE;
Assignee:
Thomson Licensing S.A., Boulogne Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 1/04 ; H04N 5/14 ;
U.S. Cl.
CPC ...
G09G 1/04 ; H04N 5/14 ;
Abstract
The invention provides a circuit for controlling a cathode ray tube. The circuit comprises a source of input color signals (U (R), U (G), U (B)) for the primary colors of the cathode ray tube. Output amplifiers are coupled to the source of color input signals and to electron guns of the cathode ray tube. Finally, limiting means are provided to limit the color input signals to a predetermined threshold value. In this way the output amplifiers are prevented from saturation and undesirable smears do not appear on the screen. In an advantageous embodiment the limiting means are realized by a diode biased in reverse direction.