| Summary: | 碩士 === 國立臺灣科技大學 === 色彩與照明科技研究所 === 104 === Using 3 dancers performing altogether for 7 minutes, the researchers conducted 3 psychophysical experiments at the Taipei Crown Art Center Theater. Viewing the performance under various light sources, 45 observers were asked to make ratings in terms of preference and visual impression of the performance.
In the first experiment, the dancers were illuminated by 21 traditional Tungsten Halogen lamps as the light sources, with 8 different lighting directions and 6 colors. In the second experiment the researchers used exactly the same dance performance and stage settings, the sole difference being the use of LED lamps as the light sources instead of the Halogen lamps. Note that the lighting settings for the LED lamps were made to be as similar to those for the Halogen lamps as possible, in terms of illuminance and correlated color temperature. The experimental results show that the observers had similar ratings for performances in the two experiments, suggesting that the difference in light sources did not make a significant impact on visual impressions of the performance.
In the third experiment, the 3 dancers sat on chairs at the stage, illuminated by 30 LED front lights with various light colors. We measured the visual perception of the observers to develop a predictive model of skin color preference illuminated by LED lights.
From the experimental results we found that color temperatures between 2400K to 3700K tended to make the dancers look warm and rich in their skin tones. Color temperatures between 4300K to 6400K made the skins feel slightly light and cold. Color temperatures between 2400K to 3700K in the range of 300lux to 1000lux tended to make the skin tone feel bright. The results also show that preference for a skin tone was correlated closely with perceived brightness of the skin tone.
This study investigates the potential of usage of new LED lighting technology in theater performance, and how the audience may react to such a change. By comparing LED and traditional lights in this study, we hope to realize new possibilities of using LED in theaters and finding suitable usage of them in stage lighting applications.
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