System for maintaining white uniformity in a displayed video image by predicting and compensating for display register changes
AssigneeThomson Licensing
InventorsIstvan Gorog, Robert Barbin
Life of this patent
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Abstract
A system for correcting a color characteristic of an image displayed in response to a video signal involves processing the video signal for predicting a variation in a physical characteristic of a display device displaying the image, processing the video signal for determining a change in the color characteristic occurring in response to the variation in the physical characteristic, and modifying the video signal for compensating for the change in the color characteristic.
Claims11
A method of correcting a color characteristic of an image displayed in response to a video signal comprising the steps of:
- A) processing the video signal for predicting a variation in a physical characteristic of a display device displaying the image;
- B) processing the video signal for determining a change in the color characteristic occurring in response to the variation in the physical characteristic;
- and
- C) modifying the video signal for compensating for the change in the color characteristic.
A method of correcting a color characteristic of an image displayed in response to a video signal comprising the steps of:
- processing the video signal for determining a temperature variation of a mask of a color picture tube;
- determining in response to the temperature variation a change in a location of an aperture of the mask relative to an initial location;
- determining in response to the change in location of the aperture a change in a register characteristic of an electron beam projected through the aperture in the mask;
- determining a change in the color characteristic occurring in response to the change in the register characteristic;
- and
- modifying the video signal for correcting for the change in the color characteristic.
Apparatus for correcting a color characteristic of an image displayed in response to a video signal comprising:
- means for processing a video signal for predicting a variation in a physical characteristic of a display device displaying an image in response to the video signal, and for processing the video signal for determining a change in a color characteristic of the image occurring in response to the variation in the physical characteristic;
- and
- means for modifying the video signal for compensating for the change in the color characteristic.
Dependencies are inferred from the claim text.