Colorimetric evaluation of display performance

摘要

The development of information techniques, using new technologies, physical phenomena and coding schemes, enables new application areas to be benefited form the introduction of displays. The full utilisation of the visual perception of a human operator, requires the colour coding process to be implemented. The evolution of displays, from achromatic (B&W) and monochromatic, to multicolour and full-colour, enhances the possibilities of information coding, creating however a need for the quantitative methods of display parameter assessment. Quantitative assessment of colour displays, restricted to photometric measurements of their parameters, is an estimate leading to considerable errors. Therefore, the measurements of a displays colour properties have to be based on spectral measurements of the display and its elements. The quantitative assessment of the display system parameters should be made using colorimetric systems like CIE 1931, CIE1976 LAB or LUV. In the paper, the constraints on the measurement method selection for the colour display evaluation are discussed and the relations between their qualitative assessment and the ergonomic conditions of their application are also presented. The paper presents the examples of using LUV colorimetric system and colour difference ΔE in the optimisation of colour liquid crystal displays.