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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65244

    Title: LED廣告看板的閃爍眩光與視覺舒適度評估;Investigation of Flicker Glare and Visual Comfort of LED Billboards
    Authors: 林孟緯;Lin,Meng-wei
    Contributors: 光電科學與工程學系
    Keywords: 眩光;光汙染;LED廣告看板的視覺舒適度;視覺舒適度模型;Glare;light pollution;visual comfort of LED billboards;model of visual comfort ratings
    Date: 2014-08-25
    Issue Date: 2014-10-15 14:44:39 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 由於LED在節約能源、環保以及動態顯示這幾點上的優勢,LED看板漸漸地取代了傳統廣告看板。然而,LED也有一些特性,像是光源面積小、高準直性以及藍光峰值,使得LED可能會對人眼感官造成不適甚至危害。此外,LED廣告看板常常在晚上使用過強亮度播放閃爍畫面,這些情況造成了不舒適眩光和光汙染的問題。
    ;Due to the advantages of LEDs in energy saving, eco-friendliness and dynamic display capability, traditional billboards are replaced by high brightness LED panels progressively. However, some distinct characteristics of LEDs, such as small source size, high directivity and the blue-peaked spectrum, make LEDs more probable to induce glare that disturbs human’s visual sensation. In addition, LED billboards usually display flashing advertisements with high brightness during the night; these conditions have led to concerns about discomfort glare and light pollution.
    This study investigates the flicker glare and visual discomfort produced by the high brightness LED panel and aims to reduce discomfort feelings by modulating some important factors. Flicker frequency, luminance, visual angle and ambient illuminance are chosen as the independent variables. The experiment complies with the within-subjects design. The orthogonal design and Latin-square design are adopted to arrange the experimental conditions. Levels of these factors are selected according to the hardware specifications and common nighttime illumination conditions.
    The results show that visual comfort is not affected by ambient illuminance, and significantly affected by flicker frequency, luminance, and visual angle. By analyzing the experimental results, we model the comfort ratings as functions of these factors and find the range of comfortable operating conditions.
    Appears in Collections:[光電科學研究所] 博碩士論文

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