雙色場色序法應用於無彩色濾光片之液晶顯示器

Abstract

色序型液晶顯示器提升了光效率並且反映了綠色顯示器的需求，因此具有極大的潛能成為次世代之節能環保顯示器。傳統色序型液晶顯示器利用180Hz場頻率時序顯示，紅色、綠色、和藍色色場，經由人眼的積分而在視網膜上呈現一全彩影像。所以，此傳統時序顯示法需要搭配快速反應之液晶，例如: 光學補償彎曲排列型液晶(OCB mode)。然而，此類型之液晶仍未成為現行主要之商業液晶模態。 基於以上論述，此研究提出一雙色場色序演算法應用於無彩色濾光片之液晶顯示器進而提供液晶足夠的反應時間。此演算法利用最少的色場數目，進而減緩了色序型顯示器對快速液晶反映時間的要求。經由此演算法，可達成產生一可接受之平均色差小於3(ΔE00ave<3)之色彩影像資訊。除此之外，此研究利用混色的概念呈現兩個色場，因而在色帶拖出時能降低人眼對色彩差異之感知程度，藉而抑制色分離現象。

A field sequential color liquid crystal display (FSC LCD) might become a next-generation display because of enhanced energy efficiency and respond to demand for Green techniques. The conventional FSC LCD flashes red, green and blue field images at 180 Hz field rate to generate a full color image so the color sequence must be achieved by using fast LC modes, such as the optically compensated bend (OCB) mode. However, the OCB mode have not commercialized for TV application yet. In the thesis, a novel color-filter free displaying method, two-color-field sequential method, was proposed for color filterless LCDs. The least field number alleviated the demand for fast-response LC modes for sequential-type LCDs, and produced full color images with acceptable color reproduction accuracy, average ΔE00ave<3. Furthermore, less chrominance difference between the two fields was beneficial in suppressing color break-up.