本論文主要是在探討運用量子點和RGBW子畫素技術的液晶顯示器，其所顯現出來的影像品質之優劣。本論文中使用4種不同發光原理的顯示器，分別是2種背光源(一般白光 LED與量子點白光 LED) ，以及2種彩色濾光片(RGB 與 RGBW)所組合的液晶顯示器。
本論文共設計三種實驗，實驗一是使用儀器量測4台顯示器，量測的項目包括階調複製曲線(紅/綠/藍/灰階)、相關色溫以及色域。實驗二以及實驗三是利用心理物理實驗的方式，對4台顯示器作評價，評價方法都為配對比較法。實驗二使用14張測試影像以及9個評價項目，讓受測者評價顯示器的優劣。實驗三探討顯示影像儘量在不改變主色相的條件下，不同彩度與明度的組合情況，對顯示影像品質所造成的影響。
實驗結果得知色域範圍較大的量子點顯示器可以顯現更多的顏色，對於低彩色訊號時因漏光所產生的高色溫偏移現象也可以有效降低。量子點顯示器適合使用在觀看低彩度以及高明度的影像上，但是在顯現高彩度的影像時較不自然，整體而言量子點液晶顯示器的影像品質優於一般型液晶顯示器。

This purpose of this paper is to explore image quality of the displays which Quantum Dot and RGBW technologies are used, to compare their image quality performances. There are 4 different principles of light emitting displays are evaluated in this paper. Among them, two displays with backlight sources (white LED and quantum dots white LED) and the other two with color filters (RGB and RGBW).
Experiment 1 is designed to measure physical characteristics of the 4 LCD displays. The physical characteristics are tone response curves (red/green/blue/neutral colors), correlative color temperatures (CCTs) of gray tracking and color gamut. Experiments 2 and 3 are psycho-visual experiments. The experimental data is analyzed by Pair Comparison. Experiment 2 uses 14 test images and 9 evaluation projects to evaluate the 4 LCD displays. Experiment 3 explores how do the conditions that keeping the same hue with different chroma and lightness settings affect the image quality performances.
The results showed that quantum dots display could offer larger color gamut which can display a wider range of colors. Quantum dots display can effectively reduce the high color temperature caused by its light leakage during low level signal. Quantum dots display is suitable for viewing images with low-chroma and high-lightness, whereas it may be more unnatural when the images are close to high-chroma. Overall, the image quality of quantum dot LCD display is better than the general LCD display.

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