| DC 欄位 |
值 |
語言 |
| DC.contributor | 光電科學與工程學系 | zh_TW |
| DC.creator | 簡瑋廷 | zh_TW |
| DC.creator | Wei-ting Chien | en_US |
| dc.date.accessioned | 2010-7-27T07:39:07Z | |
| dc.date.available | 2010-7-27T07:39:07Z | |
| dc.date.issued | 2010 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:444/thesis/view_etd.asp?URN=952406023 | |
| dc.contributor.department | 光電科學與工程學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 本論文主要著重在多LED 光源結構的精準光學模型之研究，我們將從
中場擬合法做延伸性的研究，討論光學模型其中場距離行為的限制，歸納
出準遠場距離約為LED 透鏡直徑的十倍。藉由中場距離的分析去修正傳統
模型法之誤差，我們使用光源強度權重法來建立一個多晶白光單一封裝
LED 光學模型，並在中場距離下做驗證此精準光學模型，相關係數達99.5%
以上。而後我們將討論擴散板之光學腔體效率，建立出LED 陣列搭配擴散
板之光學腔體快速計算效率之模型，並實際驗證該模型的準確性，其誤差
約在5%內。
| zh_TW |
| dc.description.abstract | In this dissertation, we studied the precise optical model of multi-LEDs for different applications. We started from the mid-field algorithm to discuss the limitation of the midfield distance for optical model. In general, the quasi
far-field distance is about 5 to 10 times of the diameter of the encapsulated lens. Based on it, a weighting factor was proposed to modify the light source in the optical model of multi-chips white LED. This optical model was also verified in several midfield distances, and then a precise model of multi-chips white LED was successfully built up. The normalized correlation coefficient is higher than 99.5%.
Then we studied the efficiency of lighting cavities composed of LED arrays. A lighting cavity is a reflecting box with light sources inside, and its exit side is covered with a diffuser plate to mix and distribute light. We derived a simple but precise calculation model for the optical efficiency of diffuser plates attached to a light cavity. Finally, the model was demonstrated in different conditions experimentally. The error between calculation model and experiment is about 5% error.
| en_US |
| DC.subject | 腔體效率 | zh_TW |
| DC.subject | 多晶白光 | zh_TW |
| DC.subject | 中場 | zh_TW |
| DC.subject | 光學模型 | zh_TW |
| DC.subject | mid-field | en_US |
| DC.subject | multi-chip | en_US |
| DC.subject | cavity efficiency | en_US |
| DC.subject | Optical model | en_US |
| DC.title | 多LED光源結構的精準光學模型之研究 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | The study of the precise optical model of multi-LEDs | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |