本論文總共分成三個主題探討。第一個實驗探討使用色彩分析儀(colorimeter)量測OLED (Organic Light-Emitting Diode，有機發光二極體)顯示器於不同環境光下顯示器的階調反應曲線特性，使用兩段式(線性+非線性)的公式描述不同環境光下的顯示器階調特性，並與傳統一段式曲線公式比較，驗證能夠達到較精確的預測。
第二個實驗旨在探討三種RGB轉換到RGBW的分色演算法，並用Matlab程式語言將之實現在彩色影像上，將彩色影像分色成紅、綠、藍、灰階四張影像，比較觀察不同的演算法在分色程度上的差異，且探討灰階在不同分色演算法的分色結果。
最後，將實驗一中量測到的環境光影響帶入一併探討，先討論RGB OLED在不同環境光照度下色域的變化，接著深入討論RGBW OLED系統中正規化RGB 訊號階段和線性化RGB 訊號階段在CIE LAB色域再現的差異。最後實驗結果發現正規化RGB訊號會造成OLED色域大幅縮小，影響顯示器的顯色能力；而線性化RGB訊號對顯示器的顯色能力幾乎沒有影響，是分色流程中較理想的操作方式。

There are three topics discussed in this thesis. The first topic majorly studied OLED (Organic Light-Emitting Diode) display characteristic under various ambient lighting conditions by using olorimeter. After the measurement, the linear piecewise formula in conjunction with the flare correction is used to describe TRC(tone response curve) under various ambient lighting conditions. The TRCs will be predicted more precisely.
The second topic discussed three kinds of RGB to RGBW conversions and used Matlab to fullfill three conversion algorithms. The stimulation included red channel, green channel, blue channel and neutral channel based on different images. The difference images related to their corresponding conversion algorithms will be discussed subsequently.
Finally, combined the flare values measuring in the first experiment with the gamut volumes. The cases were discussed whether normalized RGB stage and linear RGB stage could influence the color gamut volumes in RGBW OLED display. The results showed normalized RGB stage can reduce gamut volumes and the linear RGB stage can not.

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