A new model for accurate colorimetric characterization of liquid crystal displays

摘要

For accurate colorimetric characterization of liquid crystal displays (LCDs), a new model, piecewise partition model (PP model), was proposed. The PP model divides the digital input values into three segments for each color channel and the device space into three kinds of subspaces according to the properties of the channel chromaticity and their interactions. The characterization process mainly involves two steps. Firstly, the relationship between the CIE 1931 tristimulus values and their corresponding digital input values of primary channels are regressed with piecewise quadratic polynomial. secondly, the two-or three- channels'crosstalk items, expressed with the production of two-or three-channels'digital input values, respectively, are inserted into the model to represent the subspaces'color characteristics. Comparing with Three Dimension Look-up Table (3D- LUT), Masking, S-Curve, and Two-Primary Crosstalk models, the accuracy of the PP model surpassed all other models except for the 3D-LUT, while the number of training samples for 3D-LUT was about 11 times of that for the PP model. Hereby, in the case of less training samples, the PP model achieved comparatively the best performance.