The colorimetric model for predicting the luminance and chromaticity coordinates produced by Digital Light Processing (DLP) Projection (PJ) TV has been proposed. A series of test colors were measured. A polynomial function fitted the tone reproduction curves with five coefficients per RGB primary channel. The characterization of neutral color due to the use of spoke light was discussed. Experimental results showed that the proposed method is very effective in the colorimetry in DLP PJ TV.
The color characterization of a DLP (digital light processing) PJ (projection) TV is studied by changing the picture modes. After measuring the chromaticity coordinates, luminance, and spectral radiance of red-green-blue and white as a function of the digital-analog convert value, the contrast ratio, white luminance, chromaticity constancy, channel independency are analyzed. And then colorimetric models for producing desired colors on DLP PJ TV are studied. The performances of GOG (gain-offset-gamma) model and 1-D LUT (look up table) model are evaluated by comparing Δ Eab between measured and predicted values for 56 target colors.