Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1975-11-26
1977-01-04
Richardson, Robert L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 962
Patent
active
040018776
ABSTRACT:
In a multi-beam color display tube, having a screen on which phosphor deposits are disposed which are impinged upon by the electron beams so that they luminesce with different colors, one electron beam at a time is activated and scanned while the picture to be displayed is a blank raster. A special post-deflection coil introduces magnetic fields in the region just forward of a deflection yoke to displace the scanned beams in a controlled pattern from their normal landing points on the screen while photosensors measure the light from each color deposit at a plurality of measurement locations on the screen. The displaced beam causes the emission of an error color, the intensity of which is measured by those photosensors which are sensitive to the error color emitted. The intensity of a reference color emitted by the phosphor deposits stimulated by the undisplaced electron beam is then measured. The ratio of the error color to the reference color is then calculated for each measurement location with the largest ratio being displayed as an indication of the color purity tolerance of the tube.
REFERENCES:
patent: 3916437 (1975-10-01), Barbin
Bruestle Glenn H.
Murray William H.
RCA Corporation
Richardson Robert L.
LandOfFree
Method of measuring color purity tolerance of a color display tu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of measuring color purity tolerance of a color display tu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring color purity tolerance of a color display tu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-260440