Color vision perception testing device
AssigneeSynemed, Inc.
InventorWilliam C. Murr
Life of this patent
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Abstract
A controlled color source used in testing color vision perception includes a cathode ray tube capable of producing the three primary colors and at least one photo-detector array coupled directly to the tube screen for sensing the primary color output of the screen. The device also includes a microprocessor which processes the photo-detector signals and compares them with stored values having a predetermined correspondence to a desired color output of known hue, saturation, and luminance. The output of the comparison check is used to correct the drive voltage of the electron guns of the cathode ray tube, so that a precise color is displayed by the tube. A subject responds to the displayed color, and the color saturation and hue data are graphically displayed or stored for further use.
Claims10
An apparatus for producing a controlled color light signal, comprising a light source capable of producing and displaying any combination of the three primary colors;
- photodetector means for sensing the primary color output of said light source and generating a detector signal in response thereto;
- first storage means for storing a plurality of predetermined detector signal values corresponding to a unique combination of specific color output values of said light source;
- comparator means for comparing said detector signal with one of said stored detector signal values corresponding to a desired specific color output of said light source, and for generating a comparator signal in response to differences therebetween;
- and control means for receiving said comparator signal and correcting the output of said light source in response thereto to display said unique combination of color output values.
Dependencies are inferred from the claim text.