Patent ID: 8395638

Claim:
A method for calibrating a test color measurement device that is dedicated for use with a particular make and model of emissive display, comprising: measuring initial spectral sensitivities of at least four channels of the test color measurement device; linearly regressing the initial spectral sensitivities to a least-square best fit to Commission International de l'Éclairage (CIE) color matching functions; measuring CIE tristimulus values of a set of known test colors on the emissive display using a reference color measurement device; measuring the CIE tristimulus values on the emissive display using the test color measurement device; transforming the CIE tristimulus values as measured by the test color measurement device to the CIE tristimulus values as measured by the reference color measurement device, using a nonlinear function with variable fitting coefficients; and storing a set of initial fitting coefficient values that provide a least-square best fit of the CIE tristimulus values as measured by the test color measurement device and the CIE tristimulus values as measured by the reference color measurement device.