【摘要】：現(xiàn)有的液晶顯示器都是在正視時亮度最高,在汽車、火車、飛機(jī)駕駛艙等環(huán)境中,顯示器的最大亮度方向與人眼視線方向存在一定的夾角,造成光源能量浪費(fèi)、觀看效果不佳。目前顯示器在這些場合使用時需傾斜安裝,導(dǎo)致安裝和設(shè)計(jì)成本增加。為有效解決這些問題,本文針對這種特殊的視角觀看問題,設(shè)計(jì)了一種新型的光學(xué)膜,可以使液晶顯示器的最大亮度方向根據(jù)觀看者的位置,實(shí)現(xiàn)特定角度的偏轉(zhuǎn),更大程度地利用有限空間,提高光效、節(jié)約成本。首先確定了視角偏轉(zhuǎn)膜的放置位置,根據(jù)現(xiàn)有背光模組的配光曲線,采用非成像光學(xué)理論的設(shè)計(jì)方法,理論設(shè)計(jì)得到了視角偏轉(zhuǎn)膜表面微結(jié)構(gòu)形貌,并分別對側(cè)入式和直下式兩種背光模組下設(shè)計(jì)的視角偏轉(zhuǎn)膜進(jìn)行仿真。針對仿真中存在的視角偏轉(zhuǎn)不達(dá)標(biāo)、最大光強(qiáng)以外出現(xiàn)增益等問題,提出了基于半光強(qiáng)視角范圍的方法對偏轉(zhuǎn)膜的表面微結(jié)構(gòu)形貌進(jìn)行優(yōu)化,并對此進(jìn)行了仿真優(yōu)化,實(shí)現(xiàn)了特定角度的視角偏轉(zhuǎn)要求。根據(jù)仿真設(shè)計(jì)結(jié)果,采用灰度光刻直寫的方法制備出了相應(yīng)的偏轉(zhuǎn)膜,并對加工得到的樣品進(jìn)行實(shí)際測試,測試結(jié)果表明:和傳統(tǒng)的背光模組視角相比,側(cè)入式背光垂直方向最大亮度由原來的0°偏轉(zhuǎn)到19.2°,半亮度視角范圍由(-30.1°,29.9°)變?yōu)?-30.0°,55.1°),透過率為83.4%;直下式背光垂直方向最大亮度由原來的0°偏轉(zhuǎn)到20.6°,半亮度視角范圍由(-18.0°,18.1°)變?yōu)?-4.5°,42.1°),透過率為81.0%,滿足了特定視角的觀看要求。
[Abstract]:In the environment of automobile, train and aircraft cockpit, there is a certain angle between the maximum luminance direction of the display and the direction of the human eye line of sight, which results in energy waste of the light source and poor viewing effect. The current display needs to be tilted to install when used in these situations, resulting in higher installation and design costs. In order to solve these problems effectively, a novel optical film is designed for this special viewing angle, which can make the maximum luminance direction of liquid crystal display achieve the deflection of specific angle according to the position of the viewer. Make greater use of limited space, improve light efficiency and save cost. Firstly, the position of the angle deflection film is determined. According to the light distribution curve of the existing backlight module and the design method of the non-imaging optics theory, the surface microstructure of the angle deflection film is designed theoretically. The angle of view deflector designed under two backlight modules, side in and straight down, is simulated respectively. Aiming at the problems such as the angle of view deflection is not up to the standard and the gain appears outside the maximum light intensity in the simulation, a method based on the half light intensity angle range is proposed to optimize the surface microstructure of the deflection film, and the simulation optimization is carried out. The angle of view deflection requirement is realized. According to the result of simulation design, the corresponding deflection film is prepared by the method of gray lithography, and the processed samples are tested. The test results show that: compared with the traditional backlight module angle, The maximum vertical brightness of the side-in backlight shifted from 0 擄to 19.2 擄, the half brightness angle changed from (-30.1 擄/ 29.9 擄) to (-30.0 擄/ (55.1 擄), the transmittance was 83.4%; the vertical maximum brightness of the straight backlight shifted from 0 擄to 20.6 擄, and the half luminance angle range changed from (-18.0 擄/ 18.1 擄) to 20.6 擄(-18.0 擄/ 18.1 擄). It becomes (-4.5 擄) and (42.1 擄), and the transmittance is 81.0 擄, which meets the viewing requirements of a specific angle of view.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN873.93

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