【正文】 分辨率全色顯示方向的發(fā)展，人們對視頻畫面顯示質(zhì)量的要求日益提高。而 液晶顯示器的響應時間過慢會導致圖像質(zhì)量的降低，液晶顯示中“殘像”、“拖尾”的現(xiàn)象，即是因為響應時間過長而導致。如何降低液晶顯示器的響應時間是液晶顯示器應用到大屏幕電視中所需研究的重要課題。本文采用過驅(qū)動處理技術(shù)，對數(shù)據(jù)幀進行過驅(qū)動處理，以降低液晶顯示器的響應時間，來提高圖像畫質(zhì)。常說的 25ms、 16ms 就是指的這個反應時間，反應時間越短則使用者在看動態(tài)畫面時越不會有尾影拖曳的感覺。 關(guān)鍵詞 ：響應時間，過驅(qū)動，液晶顯示器 本科畢業(yè)設(shè)計論文 3 ABSTRACT With the development of highdefinition LCD TV to the big screen, high resolution full color display, the image quality requirements of LCD display is increased. But the slow response time of LCD will result in lower image quality, the “image sticking”, “tail” phenomenon of liquid crystal display is result from the long response time. Reduce the response time on the LCD display is important. How to reduce the response time of LCD is an important research subject in applied the LCD to large screen TV. There has been a lot of this research in this area and from different starting points put forward a lot of improvement techniques. In this paper, we use the overdriven processing to process the data fames to reduce the response time and improve the image quality. Gray to gray response time is the time the LCD unit required for the input signal transition from one gray level to another gray value, that is, the time the liquid crystal cell required for change its arrangement of molecule from one state to another state, which reflects the response rate of the input singal of the LCD pixel, the response time is the smaller the better. The principle is applying voltage to liquid crystal molecules, make the liquid crystal molecules twist or recovery. Often said of 25ms, 16ms are the response times, the shorter response time, there will be no tail drag feeling when the user looking at the dynamic screen. Generally, we divide the black and white response time into two parts: the rise time and fall time, generally, rise time and fall time are different. Key words: response time, overdrive, LCD 本科畢業(yè)設(shè)計論文 4 目錄 第一章 緒論 .................................................................................................................. 6 應用背景 ........................................................................................................... 6 研究現(xiàn)狀 ........................................................................................................... 6 主要工作 ........................................................................................................... 7 論文組織 ........................................................................................................... 7 第二章 算法實現(xiàn)原理 ................................................................................................. 9 液晶顯示器概述 ............................................................................................... 9 液晶顯示器的顯示原理 ................................................................................... 9 過驅(qū)動算法的實現(xiàn)原理 ................................................................................. 10 第三章 針對高清液晶電視的過驅(qū)動算法 ............................................................... 15 算法流程圖 ..................................................................................................... 15 圖像數(shù)據(jù)色彩空間轉(zhuǎn)換 ................................................................................. 16 雙線性插值方法 ............................................................................................. 17 詳細處理過程 ................................................................................................. 18 代碼實現(xiàn) ......................................................................................................... 19 PSNR 的計算 ................................................................................................... 19 測試效果 ......................................................................................................... 19 算法復雜度分析 ............................................................................................. 22 誤差分析 ......................................................................................................... 22 第四章 針對高清液晶電視過驅(qū)動處理的改進算法 ............................................... 24 三角插值的基本原理： ................................................................................. 24 算法流程圖 ..................................................................................................... 25 詳細處理過程 ................................................................................................. 26 代碼實現(xiàn) ......................................................................................................... 27 兩種插值的比較： ......................................................................................... 27 測試效果 ......................................................................................................... 27 算法復雜度分析 ............................................................................................. 30 誤差分析 ......................................................................................................... 30 第五章 未來的工作 ................................................................................................... 31 處理后圖像幀的動態(tài)顯示 ............................................................................. 31 與硬件的結(jié)合 .................................................................................................. 31 針對硬件存儲空間 的優(yōu)化 ............................................................................. 31 更多的嘗試 ..................................................................................................... 31 第六章 全文總結(jié) ....................................................................................................... 32 本科畢業(yè)設(shè)計論文 5 參考文獻 33 致謝 34 畢業(yè)設(shè)計小結(jié) .............................................................................................................. 35 附錄 36 附錄 1：雙線性插值過驅(qū)動算法主要代碼實現(xiàn) ..