COLOUR TELEVISION DISPLAYS: ERROR diagrams for evaluating the reproduced chromaticities of some test colours

摘要

Sets of charts or 'error diagrams' are provided, which enable the errors in the reproduction of each of seventeen test colours to be obtained, when this reproduction is effected by a colour television display in which one or more phosphors have chromaticities differing from the specified System J values. The error in test-colour reproduction is given by the vector sum of the three errors obtained by considering the effect of each display phosphor by itself. A statistical assessment of the accuracy of the method over the range of phosphor chromaticities covered by the error diagrams is given, showing that the test-colour chromaticity coordinate values obtained by the use of the charts are likely to be accurate to within a tolerance given, at worst, by 13% of the scalar sum of the errors in test-colour reproduction found for the individual phosphors.