平面顯示器之液晶電視畫質研析

Analysis of picture quality for LCD TV

何靜燕(Ching-Yen Ho)

指導教授 ： 溫武義

中原大學/工學院/電子工程研究所/碩士(2007年)

https://doi.org/10.6840/cycu200700048

摘要

現今多媒體平面顯示器（Flat Panel Display，FPD）技術中，目前應用較廣的平面顯示器技術就屬---薄膜電晶體液晶顯示器（Thin Film Transistor-Liquid Crystal Display，TFT-LCD）為重點發展領域。液晶顯示器產業的基礎架構包括了新的應用、新的技術改進、更好的顯示解決方案，另外還有市場需求和價格的變化等。因此，平面顯示器產業在現今的眾多產業中，以TFT LCD前景最為看好，而台灣的平面顯示器之TFT LCD產業鏈也已具有相當規模，可與日、韓等TFT LCD大廠互相較勁了。

TFT LCD產品應用趨於多元化，在解析度、產品尺寸等方面都提出不同的要求。對於LCD來說是尺寸和解析度的提升，從以往的4：3發展到現今的16：9，對高清晰信號格式更完善，色彩飽和度從72%更是發展到90％以上，響應時間、視角寬度都有改善，在外觀上，因背光使用燈管背光或者LED背光，外形更為輕薄，這些都是LCD的重要發展項目。

未來對液晶電視（LCD TV）產品的期望是”更大、更平、更薄、更寬、更清楚”。在畫面清晰度也加入了不少研究，讓影像品質更逼真，減少影像鋸齒、模糊、毛邊或扭曲變形等現象發生，當然還有棘手的色溫調整等問題。因此，如何調整較佳的色溫，是影響LCD TV畫面品質重要的因素之ㄧ。

本研究乃針對影響LCD TV產品優劣的關鍵話題--色溫，來作一探討分析。即使在不同的訊號源輸入時，若適當地修改軟體的設定及針對視訊解碼器的預設內容作調整，則能讓LCD TV的亮度和色溫都不至於偏移太多，而表現出較佳的液晶電視之畫質顯示。

關鍵字

顯示器 ； 液晶電視

並列摘要

TFT-LCD (Thin Film Transistor-Liquid Crystal Display) is one of the technologies used for current multimedia Flat Panel Displays, which has been applied in various applications, especially in the filed of monitor. New applications, technologies and better performance are the basic requirements of the industry to meet the future market demand and cost. TFT-LCD is therefore considered to be the star in the flat panel display industry. It is worth noting that the scale of TFT-LCD manufacture chain in Taiwan is of competitiveness comparied with those of Korean and Japan.

Larger in display size, more flatter, thinner, wider, lighter and more clearer are what consumer expected in future for TV product which is also expected to be hung on the wall. For better resolution, new technologies have been applied to reduce the phenomena of picture saw-edge, blurring or distortion. Otherwise, color temperature is another key factor that affects the performance of display. A suitable adjustment of color temperature is critical to exhibit the picture quality of LCD TV.

Various display resolutions and screen sizes have been considered in the new TFT LCD applications due to the trend of multifunction. The display size had been developed from 4:3 to current 16:9 to show better performance on HD signal and color saturation has been improved from 72% to 90%. Also better performances on the response time and viewing angles are evident. The overall size is also one of the main developments for TFT LCD. The overall size can be made smaller and thinner due to the usage of light tube or LED as backlight.

The color temperature was analyzed and discussed in this study. It was found that even under different input signal sources, better performance in brightness and color temperature could be achieved for LCD TV by giving optimal parameter settings for the software and video-information decoder used.

並列關鍵字

LCD TV ； Monitor

參考文獻

【1】液晶顯示器技術入門

【18】ITIS經濟部技術處產業技術知識服務計畫

【8】Sony、Nikkei Micro Electronics雜誌

1. LCD簡介

原著：苗村省平，原出版社：工業調查會，編譯：陳建銘，全華出版2005/10