液晶显示特定指向视角技术研究
发布时间：2018-08-30 20:55
【摘要】：现有的液晶显示器都是在正视时亮度最高,在汽车、火车、飞机驾驶舱等环境中,显示器的最大亮度方向与人眼视线方向存在一定的夹角,造成光源能量浪费、观看效果不佳。目前显示器在这些场合使用时需倾斜安装,导致安装和设计成本增加。为有效解决这些问题,本文针对这种特殊的视角观看问题,设计了一种新型的光学膜,可以使液晶显示器的最大亮度方向根据观看者的位置,实现特定角度的偏转,更大程度地利用有限空间,提高光效、节约成本。首先确定了视角偏转膜的放置位置,根据现有背光模组的配光曲线,采用非成像光学理论的设计方法,理论设计得到了视角偏转膜表面微结构形貌,并分别对侧入式和直下式两种背光模组下设计的视角偏转膜进行仿真。针对仿真中存在的视角偏转不达标、最大光强以外出现增益等问题,提出了基于半光强视角范围的方法对偏转膜的表面微结构形貌进行优化,并对此进行了仿真优化,实现了特定角度的视角偏转要求。根据仿真设计结果,采用灰度光刻直写的方法制备出了相应的偏转膜,并对加工得到的样品进行实际测试,测试结果表明:和传统的背光模组视角相比,侧入式背光垂直方向最大亮度由原来的0°偏转到19.2°,半亮度视角范围由(-30.1°,29.9°)变为(-30.0°,55.1°),透过率为83.4%;直下式背光垂直方向最大亮度由原来的0°偏转到20.6°,半亮度视角范围由(-18.0°,18.1°)变为(-4.5°,42.1°),透过率为81.0%,满足了特定视角的观看要求。
[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 掳to 19.2 掳, the half brightness angle changed from (-30.1 掳/ 29.9 掳) to (-30.0 掳/ (55.1 掳), the transmittance was 83.4%; the vertical maximum brightness of the straight backlight shifted from 0 掳to 20.6 掳, and the half luminance angle range changed from (-18.0 掳/ 18.1 掳) to 20.6 掳(-18.0 掳/ 18.1 掳). It becomes (-4.5 掳) and (42.1 掳), and the transmittance is 81.0 掳, which meets the viewing requirements of a specific angle of view.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN873.93
[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 掳to 19.2 掳, the half brightness angle changed from (-30.1 掳/ 29.9 掳) to (-30.0 掳/ (55.1 掳), the transmittance was 83.4%; the vertical maximum brightness of the straight backlight shifted from 0 掳to 20.6 掳, and the half luminance angle range changed from (-18.0 掳/ 18.1 掳) to 20.6 掳(-18.0 掳/ 18.1 掳). It becomes (-4.5 掳) and (42.1 掳), and the transmittance is 81.0 掳, which meets the viewing requirements of a specific angle of view.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN873.93
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