PERCEPTUAL SENSITIVITY TO THE COLOUR CHANGE OF TEMPORALLY MODULATED STIMULUS - TOWARDS INDEXING VIEW ANGLE DEPENDENCY OF OLED PANELS

摘要

Organic electroluminescent lighting (OLED) is expected to become one of the next generation lighting devices. However, OLED panel changes its chromaticity depending on the view angle. It will become ellipse-like shapes if the chromaticity change is plotted in the CIE xy diagram. In order to index the performance of the OLED panel properly, it is essential to evaluate this property. Thus, it is necessary to know how we perceive such chromatic change. We assume that this chromatic change can be simulated with dynamic colour change, or temporally modulated colour. Under this assumption, we conducted a psychophysical experiment to evaluate the perceived magnitude of this chromatic change. In our preliminary experiments, we obtained the results that the subjects perceived the colour change to be larger as the change of a~* direction increased.