Back to results
US 5,345,275 AGranted
Color temperature selection circuitry having color matrix correction
AssigneeThomson Consumer Electronics, Inc.
InventorJeffery B. Lendaro
Life of this patent
Estimating the term…
Abstract
In a television receiver including a feature allowing a user to select a color temperature at which whites will be produced on a display screen, circuitry is provided for altering the gain of the red and blue kine driver stages and simultaneously automatically altering the gain of the R-Y and B-Y color difference signal amplifier, to correct for errors which would otherwise be introduced by adversely altering the B-Y/R-Y ratio.
Claims4
In a color television system, apparatus comprising:
- means for altering the gain of one of a red color signal amplifier and a blue color signal amplifier to affect the temperature of a white area displayed on a display screen;
- and
- means for controlling the gain of a respective one of an R-Y color difference amplifier and a B-Y color difference amplifier concurrently and in the opposite sense to the alternation of the gain of said one of said red color signal amplifier and said blue color signal amplifier.
Dependencies are inferred from the claim text.