Characterisation of a desktop LCD projector

A typical desktop LCD projector was characterised. Having determined the op timum settings of the brightness and contrast controls, measurements were m ade with a spectroradiometer to establish the additivity of the primaries, inter-channel dependence, colour gamut, tone scale, contrast, spatial non-u niformity, temporal stability and viewing angle variation. Four mathematica l models were compared for their accuracy in predicting the colours generat ed by the display for arbitrary signal inputs. A new model was developed fo r the S-shaped electro-optical transfer function of the LCD device, and was extended to predict the anomalous colour tracking of the primaries. (C) 20 00 Elsevier Science B.V. All rights reserved.