International Business Machines Corporation

Campbell Cromer

Richard Ian Knox

Apparatus for setting the color point of a color display device comprises a video signal generator for generating an image on the display device and a color analyzer for measuring the chromaticity of the image to produce digital coordinates corresponding to the color point of the image on a chromaticity reference chart. The apparatus further comprises a computer system connected to the color analyzer. The computer system includes interface means for reading the digital coordinates from the color analyzer, display means for displaying a cursor at a point corresponding to the coordinates within a graphical representation of the reference chart, and processor means for moving the cursor within the graphical representation in response to a change in the coordinates read from the color analyzer. The apparatus advantageously permits rapid adjustment of the color point of a display device to a desired value with a high level of measurement repeatability. Any recalibration of the apparatus can be performed by adjusting a set of digital values stored in the computer system.

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Gourock, United Kingdom

Campbell Cromer