| Summary: | 碩士 === 國立清華大學 === 工業工程與工程管理學系 === 88 === Because of the prevalence of personal computers, the interaction between displays and human beings is more and more frequent. The traditional displays, cathode ray tubes (CRTs), are still the main stream in the market, but have drawbacks such as higher power consumption, heavy and big size. Liquid crystal displays (LCDs) don''t have the above-mentioned drawbacks, and LCDs may substitute CRTs in the display market gradually.
Because of the difference of manufacture technology between CRTs and LCDs, it results in different visual display quality. In this study, the suitable display environmental design when people take searching tasks in LCDs was explored, and it contained two factors, color setting and image polarity. The tasks similar with searching tasks on the world wide web (WWW) were designed and used in different display environments (the combination between different color settings, image polarity and displays) in the experiments. The subjects'' searching time, the amount of errors and visual frequency threshold would be recorded and the subjects would be asked to give the rating of subjective evaluation in different conditions. The effect of background image on visual display quality was also a topic in this study.
The results in this study indicated that negative polarity was more suitable than positive polarity in LCDs. Red as background color is not a good choice in negative polarity no matter in LCDs or in CRTs. The color setting, green as background color and magenta as front color, is not suggested to be used in positive polarity in LCDs or in CRTs. Avoid using background images behind words, and just use background images surrounding the words or articles.
The results of this research will be useful in searching task design or web page design in LCDs.
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