Colorimeter for color displays

Details Colorimeter for color displays Colorimeter for color displays

1992-04-16

1994-11-08

Evans, F. L.

Optics: measuring and testing

By shade or color

Tristimulus examination

356406, 364526, 348179, 348189, G01J 350

Patent

active

053631978

ABSTRACT:
A tristimulus colorimeter for color displays is required to remove measurement errors caused by deviations of the spectral responsivities thereof from the color matching functions. The colorimeter is provided with a light receiving unit having spectral responsivities close to the color matching functions, a tristimulus values operation unit for performing operations to calculate tristimulus values, and a chromaticity operation unit for performing operations to calculate a chromaticity. The colorimeter is further provided with a spectral distribution storage unit for storing spectral distributions of representative colored lights, a mixing ratio operation unit for performing operations to calculate a mixing ratio of a mixed light including colored lights of red, green, and blue. The colorimeter is also provided with a spectral distribution operation unit and a corrected chromaticity operation unit. The spectral distribution operation unit performs operations to calculate a spectral distribution of the mixed light while the corrected chromaticity operation unit performs operations to calculate a corrected chromaticity of the mixed light.

REFERENCES:
patent: 4989982 (1991-02-01), Osaki et al.

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