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題名:螢幕種類、環境照明、與文字/背景色彩組合對終端機視覺作業影響之研究
作者:林清泉
作者(外文):Lin, Chin-Chiuan
校院名稱:國立臺灣科技大學
系所名稱:工業管理系
指導教授:謝光進
學位類別:博士
出版日期:2000
主題關鍵詞:螢幕種類環境照明色彩組合極性閱讀績效主觀偏好視覺疲勞主觀評量視距screen typeambient illuminationcolor combinationpolarityreading performancesubjective preferencesubjective visual fatigueviewing distance
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本研究以兩個實驗探討CRT和TFT-LCD二種螢幕在各種顯示條件下對視覺作業的影響。實驗1為”瞬間顯示”實驗方式,探討螢幕種類、環境照明、與文字/背景色彩組合對視覺績效與主觀偏好的影響。實驗結果發現:TFT-LCD的視覺績效優於CRT;環境照明於450 lx的視覺績效較200 lx佳;色彩組合以黃底藍字的視覺績效最佳,紅底紫字最差。螢幕種類與環境照明的組合有交互作用,在200 lx的環境照明時,兩螢幕間的視覺績效差異不大,但在450 lx時,TFT-LCD的視覺績效顯著優於CRT。文字/背景色彩組合為唯一對主觀偏好評分有顯著影響的因子,黃底藍字的偏好最高,紅底紫字最低,色彩組合對主觀偏好與視覺績效的影響相當一致。
實驗2為”長時間閱讀”實驗方式,探討螢幕種類、極性、與文字色彩對長時間閱讀績效、視覺疲勞主觀評量、與視距的影響。實驗結果發現:螢幕種類、極性、與文字色彩對閱讀績效與視覺疲勞主觀評量的影響皆不顯著。極性為唯一對平均視距影響顯著的因子,陽性呈現的平均視距較遠。視覺疲勞主觀評量與平均視距間呈顯著負相關。綜合研究結果,TFT-LCD似乎優於CRT,陽性呈現優於陰性呈現,色彩以非飽合色彩較佳。
Two experiments were conducted to compare CRT and TFT-LCD under various working conditions in this study. The first experiment investigated the effects of screen type, ambient illumination, and target/background color combination on visual identification performance and subjective preference. Results showed that screen type significantly affected visual performance. Subjects performed better with the thin film transistor liquid crystal display (TFT-LCD) than with the cathode ray tube (CRT). Visual performance was better under 450 lx ambient illumination, versus, 200 lx. Color combination also significantly affected visual performance, with blue letters on a yellow background resulting in the best performance and purple-on-red the worst. Subjective preference was significantly affected by color combination. Blue-on-yellow resulted in the greatest subjective preference, while purple-on-red the worst. Thus, subjective preference and visual performance for color combinations were related.
The second experiment investigated the effects of screen type, polarity, and color combination on long time reading performance, subjective visual fatigue, and viewing distance. Results indicated that neither reading performance nor subjective visual fatigue was significantly affected by screen type, polarity, or color combination. Viewing distance was significantly affected by polarity, with positive presentation resulting in longer viewing distance than negative presentation. Subjective visual fatigue was significantly related to viewing distance. Subjects with longer viewing distance generally experienced less subjective visual fatigue.
In summary, for VDT work, the TFT-LCD screen seemed to be the preferred technology, positive presentation more appropriate than negative presentation, and unsaturated color better than saturated color.
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