【摘要】：摘要：三維(3D)立體顯示憑借其比傳統(tǒng)的二維(2D)顯示更具身臨其境的視覺感受,越來越得到更加廣泛的研究和應(yīng)用,將成為下一代顯示技術(shù)的重要發(fā)展方向。本文基于邊緣場開關(guān)(FFS)模式液晶面板,對3D顯示中一些關(guān)鍵技術(shù)進(jìn)行了研究。 對于快門式(SG)3D顯示器件,本文針對制約FFS模式液晶面板應(yīng)用于SG3D顯示器件的瓶頸—響應(yīng)時間問題,設(shè)計制備了FFS模式快響應(yīng)液晶面板,并采用該液晶面板成功制備了SG3D顯示器件。對FFS模式液晶面板響應(yīng)時間的提升,主要從像素設(shè)計的優(yōu)化、快響應(yīng)液晶材料的設(shè)計,以及低液晶層厚等方面進(jìn)行了研究。通過對面板像素的模擬,選取了像素電極周期(2nd ITO pitch)為8μm,電極寬度(Slit width)為2.7μm,電極與液晶取向夾角(Slit angle)11°,液晶層厚(Cell gap)從3.55μm減小到2.81μm的優(yōu)化條件。結(jié)合像素結(jié)構(gòu)的優(yōu)化,設(shè)計了低粘度(γ1)、高彈性常數(shù)(k2)和高光學(xué)各向異性(△n)的快響應(yīng)液晶材料,在驅(qū)動電壓基本保持不變的情況下,灰階響應(yīng)時間(GTG RT)從7.43ms降低到4.48ms,相對于同樣的液晶層厚,面板透過率相比于傳統(tǒng)液晶提高了15.6%。同時,控制了白光色度和色溫(CCT)的偏移。進(jìn)一步地,采用FFS模式快響應(yīng)液晶面板,制備了SG3D顯示器件,其3D串?dāng)_(Crosstalk)達(dá)到3.7%。并且,當(dāng)Cell gap從2.8μm調(diào)整到2.61μm時,優(yōu)化的灰階響應(yīng)時間達(dá)到3.18ms,優(yōu)化的3D crosstalk為3.33%,3D顯示效果得到進(jìn)一步提升。同時,研究了FFS模式下相位延遲(Retardation)對液晶光效和相對色溫的影響：在260-350nm光程區(qū)間內(nèi),Retardation每增加10nm,液晶光效有約3%的提高,色溫有約800-900K的降低。 對于偏光式(PR)3D顯示器件,本文針對垂直方向3D串?dāng)_敏感、難以對3D視角進(jìn)行精確評估的問題,分析研究了PR3D視角機理,推導(dǎo)建立了3D視角精確評估的理論模型。采用該模型,對基于FFS模式面板的PR3D垂直視角、PR的貼附偏差及PR與面板像素的匹配進(jìn)行了研究。相比于傳統(tǒng)3D視角計算方法,引入了串?dāng)_、像素開口和光界面折射等參數(shù),提出和構(gòu)建了新的3D視角評估模型,并推導(dǎo)了計算公式,實驗驗證了3D視角評估方法的有效性。系統(tǒng)研究了PR3D顯示面板主要參數(shù)對3D視角的影響：3D視角與BM寬度、像素尺寸,以及玻璃基板和偏振片的折射率成正比,而與玻璃基板和偏振片的厚度成反比。減薄玻璃基板的厚度,是一種提升3D視角行之有效的方法�；谛碌�3D視角計算模型,推導(dǎo)和驗證了當(dāng)PR帖附發(fā)生偏差時的上下3D視角：PR帖附發(fā)生偏差時,上下3D視角有偏移發(fā)生,視角偏移沿PR相對于像素錯位的方向,錯位越多,3D視角偏移越大,但總的3D視角基本保持不變。基于新的3D視角計算模型,推導(dǎo)和驗證了當(dāng)PR收縮設(shè)計時的上下3D視角：PR收縮設(shè)計有利于將上下3D視角向中心匯聚,能實現(xiàn)更好的3D視角效果。對于PR3D顯示器件,3D視角機理的分析和理論模型的建立,對于偏光立體顯示中3D垂直視角和面板設(shè)計的優(yōu)化具有重要的參考意義。 對于3D顯示器件對圖像的色彩再現(xiàn)能力提升,本文對應(yīng)用于3D顯示的FFS模式液晶面板的標(biāo)準(zhǔn)色域進(jìn)行了設(shè)計研究。模擬分析了光譜對色度的影響,從LED背光源和彩膜兩部分光譜進(jìn)行了調(diào)節(jié)和優(yōu)化,通過采用RG熒光粉LED背光匹配新的彩膜光阻,選取彩膜厚度2.2μm時,FFS模式3D顯示器件的NTSC色域從65.3%提升到74.9%,sRGB匹配率從83.2%提升到100%,實現(xiàn)了sRGB標(biāo)準(zhǔn)色域的全覆蓋,白光透過率達(dá)到28.1%。驗證了背光源和彩膜光譜波峰位置向顏色純化方向Shift、以及其半波寬度的窄化有利于色域的提升。
[Abstract]:Absrtact: Three-dimensional (3D) stereoscopic display is more and more widely studied and applied because of its more immediate visual experience than traditional two-dimensional (2D) display, and will become an important development direction of the next generation display technology.
For the shutter type (SG) 3D display device, this paper designs and fabricates the fast response liquid crystal panel in FFS mode, aiming at the bottleneck of the application of FFS mode LCD panel in SG3D display device, and successfully fabricates the SG3D display device with this LCD panel. Through the simulation of the panel pixels, the pixel electrode period (2nd ITO pitch) is 8 micron, the electrode width (Slit width) is 2.7 micron, the angle between the electrode and the liquid crystal orientation (Slit angle) is 11 degrees, and the thickness of the liquid crystal layer (Cell gap) is reduced from 3.55 micron to 2.81 micron. Combining with the optimization of pixel structure, a low viscosity (gamma 1), high elastic constant (k 2) and high optical anisotropy (delta n) fast response liquid crystal material was designed. The gray-scale response time (GTG RT) was reduced from 7.43 MS to 4.48 MS with the driving voltage unchanged. Compared with the same thickness of liquid crystal layer, the transmittance of the panel was lower than that of the traditional one. Furthermore, the fast response liquid crystal panel in FFS mode was used to fabricate the SG3D display device, and the Crosstalk was 3.7%. Moreover, when the Cell gap was adjusted from 2.8 to 2.61 micron, the optimized grey-scale response time was 3.18 ms, the optimized 3D crosstalk was 3.33%. At the same time, the effect of phase delay on the light efficiency and relative color temperature of liquid crystal in FFS mode is studied. For every 10 nm increase of Retardation, the light efficiency of liquid crystal increases by about 3% and the color temperature decreases by about 800-900K in the 260-350 nm optical path.
For polarized-light (PR) 3D display devices, in view of the problem that the vertical 3D crosstalk is sensitive and it is difficult to accurately evaluate the 3D viewing angle, the mechanism of PR3D viewing angle is analyzed and studied, and a theoretical model for precise evaluation of 3D viewing angle is deduced. Comparing with the traditional 3D viewing angle calculation method, the parameters of crosstalk, pixel opening and optical interface refraction are introduced. A new 3D viewing angle evaluation model is proposed and constructed, and the calculation formula is deduced. The validity of the 3D viewing angle evaluation method is verified by experiments. The influence of the main parameters of PR3D display panel on the 3D viewing angle is studied systematically. 3-D viewing angle is proportional to BM width, pixel size, and the refractive index of glass substrate and polarizer, but inversely proportional to the thickness of glass substrate and polarizer. Thinning the thickness of glass substrate is an effective method to enhance the 3-D viewing angle. Based on the new 3-D viewing angle calculation model, the up and down 3-D viewing angles are deduced and verified when PR attachment deviates. View angle: When PR attachment deviation occurs, the upper and lower 3D view angle deviates. The more the deviation, the greater the 3D view angle deviation. But the total 3D view angle remains unchanged. Based on the new 3D view angle calculation model, the upper and lower 3D view angle when PR contraction design is carried out is deduced and validated: PR contraction design is beneficial to the design of PR contraction. For PR3D display devices, the analysis of 3D viewing mechanism and the establishment of theoretical model are of great significance to the optimization of 3D vertical viewing angle and panel design in polarized stereoscopic display.
In order to improve the color reproduction ability of 3D display devices, the standard color gamut of FFS mode LCD panel for 3D display is designed and studied in this paper. The NTSC gamut of FFS mode 3D display was increased from 65.3% to 74.9% and the matching ratio of sRGB was increased from 83.2% to 100% when the thickness of color film was 2.2 micron. The full coverage of sRGB standard gamut was achieved, and the white light transmittance was 28.1%. It was verified that the peak position of backlight and color film was in the direction of color purification, and the narrowing of its half-wave width. Conducive to the promotion of color gamut.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TN873

【共引文獻(xiàn)】

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本文編號：2208782