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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/62587


    Title: 利用LED與晝光混光照明應用在學校教學大樓上之設計;The Illumination Design and Application of LED and Daylight Hybrid Lighting Used in the Teaching Building
    Authors: 孫文信
    Contributors: 國立中央大學光電科學與工程學系
    Keywords: 材料科技;光電工程
    Date: 2012-12-01
    Issue Date: 2014-03-17 11:51:41 (UTC+8)
    Publisher: 行政院國家科學委員會
    Abstract: 研究期間:10108~10207;Hybrid sunlight and light-emitting diode (LED) illumination with renewable solar energy saving concept in indoor lighting is planning to be simulated and presented in this project. We can illuminate the indoor space and collect the solar energy by an optical switching system. When we out of the office, the system is turn off, the full spectrum of the sunlight is concentrated by a concentrator, and absorbed by solar photovoltaic devices that provide the electricity power for LEDs or other electric equipments; when we in the office, the system is turn on, the sunlight is collected by a concentrator and split into visible and non-visible rays by a beam splitter. The visible rays pass through the light guide into a light box and mixed with red, green, blue, and white light LED uniformly in it, and finally provide more uniform illumination by a diffuser. The non-visible rays are supposed to be absorbed by solar photovoltaic devices and also provide the electricity power for LEDs or other electric devices. Simulating results will show that the efficiency of the hybrid sunlight/LED illumination with renewable solar energy saving design is better than LED and traditional lighting systems. Methods for simulating the color temperature, hue and brightness of daylight illumination for hybrid light box lighting simply by adjusting the intensity of red, green, and blue light emitting diodes will be also proposed in this project. We will obtain uniform color mixing with a light box by adjusting the ratios between the intensities of red, green, blue, and white LEDs. The intensity can be found by measuring the CIE chromaticity coordinates (x, y) and the luminance Y of the daylight with a chroma meter. After the chromaticity coordinates (x, y) and the luminance Y are found, the tristimulus values can be calculated and then transferred to red, green, and blue primaries by linear transformation. With the correct ratio of red, green, blue, and white intensities, the color temperature, hues and brightness of daylight can be rebuilt by red, green, and blue light emitting diodes.
    Relation: 財團法人國家實驗研究院科技政策研究與資訊中心
    Appears in Collections:[光電科學與工程學系] 研究計畫

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