Transparent displays allow observers to see the objects behind the displays as well as information on the displays. For this reason, transparent displays have received attention as next-generation displays. Visibility of the background objects when they are seen through the on-screen contents is very important for designers of on-screen contents as well as observers of transparent displays. In this paper, factors affecting the visibility of the seethrough objects are examined first. Each of selected factors is formulated. Finally, visibility of the see-through objects is defined as a function of the selected factors. Validity of the proposed model for visibility of the see-through objects is verified by comparing them with results from human visual experiments.
Transparent displays allow observers to see the objects behind the displays as well as information on the displays. See-through capability is one of the most important performance indices of transparent display. It is often called as blurriness of transparent display. This paper presents performance evaluations of the various measures of blurriness designed to describe the see-through capability of transparent display. Performance of the measures was evaluated by comparing values of measures with results from human visual experiments.
This paper presents results of perceptible and acceptable ranges for color gamut change of transparent liquid crystal display (LCD) by luminous sources. Color gamut of transparent LCD can be changed by external luminous source because LCD cannot emit by itself. In this paper, perceptible and acceptable ranges to optimize color gamut for transparent LCD were found by psychophysical experiments. External luminous sources which have color temperatures of 3000, 5000 and 6500K were used. As a result, the differences of perceptible and acceptable ranges of color gamut using light sources are about 3% and 18% respectively. In addition, the differences of perceptible and acceptable range were investigated according to illuminance of external luminous. The difference of perceptible ranges does not affect the illuminance intensity. When the intensity of illuminance was high, the acceptable range was decreased than low illuminance. When the color gamut of transparent LCD has decreased within acceptable ranges, most observers can permit the image quality regardless of light source. In other words, transparent LCD which has somewhat narrow color gamut can be permitted.