{"defaultlang":"zh","titlegroup":{"articletitle":[{"lang":"zh","data":[{"name":"text","data":"基于扩展光源的视角偏转膜表面微结构设计"}]},{"lang":"en","data":[{"name":"text","data":"Surface microstructure design of viewing angle deflection film based on extended light source"}]}]},"contribgroup":{"author":[{"name":[{"lang":"zh","surname":"冯","givenname":"奇斌","namestyle":"eastern","prefix":""},{"lang":"en","surname":"FENG","givenname":"Qi-bin","namestyle":"eastern","prefix":""}],"stringName":[],"aff":[{"rid":"aff1","text":"1"},{"rid":"aff2","text":"2"}],"role":["first-author"],"bio":[{"lang":"zh","text":["冯奇斌（1970-），女，天津人，副教授，1992年于上海机械学院获得学士学位，1995年于华东工业大学获得硕士学位，2006年于维也纳工业大学获得博士学位，主要从事立体显示、LED背光等方面的研究。 E-mail：fengqibin@hfut.edu.cn通讯作者："],"graphic":[{"print":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17424895&type=","small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17424904&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17424899&type=","width":"22.01333618","height":"32.00401306","fontsize":""}],"data":[[{"name":"text","data":"冯奇斌"},{"name":"text","data":"（1970-），女，天津人，副教授，1992年于上海机械学院获得学士学位，1995年于华东工业大学获得硕士学位，2006年于维也纳工业大学获得博士学位，主要从事立体显示、LED背光等方面的研究。 E-mail："},{"name":"text","data":"fengqibin@hfut.edu.cn"},{"name":"text","data":"通讯作者："}]]}],"email":"fengqibin@hfut.edu.cn","deceased":false},{"name":[{"lang":"zh","surname":"李","givenname":"德华","namestyle":"eastern","prefix":""},{"lang":"en","surname":"LI","givenname":"De-hua","namestyle":"eastern","prefix":""}],"stringName":[],"aff":[{"rid":"aff3","text":"3"}],"role":[],"deceased":false},{"name":[{"lang":"zh","surname":"肖","givenname":"慧丽","namestyle":"eastern","prefix":""},{"lang":"en","surname":"XIAO","givenname":"Hui-li","namestyle":"eastern","prefix":""}],"stringName":[],"aff":[{"rid":"aff4","text":"4"}],"role":[],"deceased":false},{"name":[{"lang":"zh","surname":"王","givenname":"梓","namestyle":"eastern","prefix":""},{"lang":"en","surname":"WANG","givenname":"Zi","namestyle":"eastern","prefix":""}],"stringName":[],"aff":[{"rid":"aff1","text":"1"},{"rid":"aff2","text":"2"}],"role":[],"deceased":false},{"name":[{"lang":"zh","surname":"吕","givenname":"国强","namestyle":"eastern","prefix":""},{"lang":"en","surname":"LÜ","givenname":"Guo-qiang","namestyle":"eastern","prefix":""}],"stringName":[],"aff":[{"rid":"aff3","text":"3"}],"role":["corresp"],"corresp":[{"rid":"cor1","lang":"en","text":"E-mail： guoqianglv@hfut.edu.cn","data":[{"name":"text","data":"E-mail： guoqianglv@hfut.edu.cn"}]}],"email":"guoqianglv@hfut.edu.cn","deceased":false}],"aff":[{"id":"aff1","intro":[{"lang":"zh","label":"1","text":"合肥工业大学 特种显示技术国家工程实验室，安徽  合肥  230009","data":[{"name":"text","data":"合肥工业大学 特种显示技术国家工程实验室，安徽  合肥  230009"}]},{"lang":"en","label":"1","text":"National Engineering Laboratory of Special Display Technology， Hefei University of Technology， Hefei  230009， China","data":[{"name":"text","data":"National Engineering Laboratory of Special Display Technology， Hefei University of Technology， Hefei  230009， China"}]}]},{"id":"aff2","intro":[{"lang":"zh","label":"2","text":"合肥工业大学 光电技术研究院，安徽  合肥  230009","data":[{"name":"text","data":"合肥工业大学 光电技术研究院，安徽  合肥  230009"}]},{"lang":"en","label":"2","text":"Academy of Photoelectric Technology， Hefei University of Technology， Hefei  230009， China","data":[{"name":"text","data":"Academy of Photoelectric Technology， Hefei University of Technology， Hefei  230009， China"}]}]},{"id":"aff3","intro":[{"lang":"zh","label":"3","text":"合肥工业大学 仪器科学与光电工程学院，安徽  合肥  230009","data":[{"name":"text","data":"合肥工业大学 仪器科学与光电工程学院，安徽  合肥  230009"}]},{"lang":"en","label":"3","text":"School of Instrumentation and Opto-Electronics Engineering， Hefei University of Technology， Hefei  230009， China","data":[{"name":"text","data":"School of Instrumentation and Opto-Electronics Engineering， Hefei University of Technology， Hefei  230009， China"}]}]},{"id":"aff4","intro":[{"lang":"zh","label":"4","text":"合肥工业大学 电子科学与应用物理学院，安徽  合肥  230009","data":[{"name":"text","data":"合肥工业大学 电子科学与应用物理学院，安徽  合肥  230009"}]},{"lang":"en","label":"4","text":"School of Electronic Science & Applied Physics， Hefei University of Technology， Hefei  230009， China","data":[{"name":"text","data":"School of Electronic Science & Applied Physics， Hefei University of Technology， Hefei  230009， China"}]}]}]},"abstracts":[{"lang":"zh","data":[{"name":"p","data":[{"name":"text","data":"为了使应用于驾驶舱内的液晶显示器满足观看者的特殊视角要求，设计了一种能够将液晶显示器的最大亮度由正视方向根据观看者的位置偏转到特定方向的光学膜。本文基于扩展光源进行设计，根据扩展光源上不同位置的光线到达微结构的能量不同，提出了分段加权叠加的方法设计出微结构面型。仿真结果表明：水平视角不变，垂直视角偏转"},{"name":"italic","data":[{"name":"text","data":"-"}]},{"name":"text","data":"15º，光线透过率为84.7%，半亮度视角范围为（-38.4º，4.4º）。采用无掩膜直写光刻工艺制作了实际样品并进行了效果测试，测试结果表明：和传统的背光视角相比，垂直方向的最大亮度由原来的0º偏转到-16°，半亮度视角由（-23.8º，27.4º）变为（-43º，9.4º），透过率为83.0%，同时满足视角偏转和亮度的要求。"}]}]},{"lang":"en","data":[{"name":"p","data":[{"name":"text","data":"To make a liquid crystal display used in the cockpit meet the special viewing angle requirements of the viewer， we designed a new type of optical film for deflecting the maximum brightness of the liquid crystal display from the frontal direction to a specific direction according to the position of the viewer. Using an extended light source， we propose a segment-weighted method for designing microstructures wherein the light from the different positions of the extended light source has different energy levels. The simulation results show that the horizontal viewing angle is unchanged， the vertical viewing angle is deflected by -15°， the light transmittance is 84.7%， and the half-brightness viewing angle range was （-38.4°， 4.4°）. An actual sample was fabricated using a maskless direct-write lithography process， and an effect test was performed. The test results show that the maximum vertical brightness was deflected from 0° to -16° and the half-brightness viewing angle is changed from （-23.8°， 27.4°） to （-43°， 9.4°） compared with the traditional backlight viewing angle. The transmittance is 83.0%， which meets the requirements of deflected viewing angle and brightness."}]}]}],"keyword":[{"lang":"zh","data":[[{"name":"text","data":"液晶显示"}],[{"name":"text","data":"扩展光源"}],[{"name":"text","data":"分段加权叠加"}],[{"name":"text","data":"表面微结构"}],[{"name":"text","data":"视角偏转"}]]},{"lang":"en","data":[[{"name":"text","data":"liquid crystal display"}],[{"name":"text","data":"extended light source"}],[{"name":"text","data":"segment-weighted method"}],[{"name":"text","data":"surface microstructure"}],[{"name":"text","data":"viewing angle deflection"}]]}],"highlights":[],"body":[{"name":"sec","data":[{"name":"sectitle","data":{"title":[{"name":"text","data":"1 引　言"}],"level":"1","id":"s1"}},{"name":"p","data":[{"name":"text","data":"液晶显示已经广泛用于电视、手机、个人电脑等领域"},{"name":"sup","data":[{"name":"text","data":"［"},{"name":"xref","data":{"text":"1","type":"bibr","rid":"R1","data":[{"name":"text","data":"1"}]}},{"name":"text","data":"］"}]},{"name":"text","data":"。在这些应用中，通常要求液晶显示的主视角是液晶屏的法线方向，也就是在液晶屏法线方向的亮度最高。但是，在飞机、火车、汽车驾驶舱等一些特殊的显示环境中，受显示器安装位置和角度的限制，观看者不能正视显示器，显示器通常需要倾斜安装以便于观看者获得最佳的观看角度，这会大大增加安装和设计成本。一个有效的解决方法是对液晶显示器的背光源进行光线调控，根据显示器法线方向与观看者视线之间的夹角，利用一层具有表面微结构的光学膜使背光源的最大亮度方向由0°偏转到观看者视线方向。目前，这种方法都是基于点光源设计，偏转后的视角曲线与光源视角曲线的拟合度较差，并且光线透过率较低。"}]},{"name":"p","data":[{"name":"text","data":"液晶显示器的背光源分为直下式和侧入式。目前对直下式背光的视角调控有两种方法，一种是通过自由曲面透镜对LED发出的光线进行调控"},{"name":"sup","data":[{"name":"text","data":"［"},{"name":"blockXref","data":{"data":[{"name":"xref","data":{"text":"2","type":"bibr","rid":"R2","data":[{"name":"text","data":"2"}]}},{"name":"text","data":"-"},{"name":"xref","data":{"text":"11","type":"bibr","rid":"R11","data":[{"name":"text","data":"11"}]}}],"rid":["R2","R3","R4","R5","R6","R7","R8","R9","R10","R11"],"text":"2-11","type":"bibr"}},{"name":"text","data":"］"}]},{"name":"text","data":"，这种透镜会增加背光模块的厚度；另一种方法是利用特殊设计的具有表面微结构的光学膜来调控光线"},{"name":"sup","data":[{"name":"text","data":"［"},{"name":"blockXref","data":{"data":[{"name":"xref","data":{"text":"12","type":"bibr","rid":"R12","data":[{"name":"text","data":"12"}]}},{"name":"text","data":"-"},{"name":"xref","data":{"text":"15","type":"bibr","rid":"R15","data":[{"name":"text","data":"15"}]}}],"rid":["R12","R13","R14","R15"],"text":"12-15","type":"bibr"}},{"name":"text","data":"］"}]},{"name":"text","data":"，能够实现液晶显示器的轻薄化。侧入式背光通常是针对导光板进行设计，在导光板的上下表面设计不同形状的微结构实现对光线的偏转和提取"},{"name":"sup","data":[{"name":"text","data":"［"},{"name":"xref","data":{"text":"16","type":"bibr","rid":"R16","data":[{"name":"text","data":"16"}]}},{"name":"text","data":"］"}]},{"name":"text","data":"；设计两个LED光源模块以提供不同的视角模式，即宽视角模式和窄视角模式"},{"name":"sup","data":[{"name":"text","data":"［"},{"name":"xref","data":{"text":"17","type":"bibr","rid":"R17","data":[{"name":"text","data":"17"}]}},{"name":"text","data":"］"}]},{"name":"text","data":"。但上述方法只能实现视角范围的收缩或扩大，并不能偏转背光源的最大亮度视角。文献［"},{"name":"blockXref","data":{"data":[{"name":"xref","data":{"text":"18","type":"bibr","rid":"R18","data":[{"name":"text","data":"18"}]}},{"name":"text","data":"-"},{"name":"xref","data":{"text":"20","type":"bibr","rid":"R20","data":[{"name":"text","data":"20"}]}}],"rid":["R18","R19","R20"],"text":"18-20","type":"bibr"}},{"name":"text","data":"］设计了具有表面微结构的光学膜来实现视角偏转，但是该方法基于点光源，而实际要应用于扩展光源，理论设计与实际效果之间有很大差距，需要通过大量的优化工作来改善视角偏转效果，过程繁琐。"}]},{"name":"p","data":[{"name":"text","data":"本文提出一种基于扩展光源设计视角偏转膜微结构的方法，将扩展光源离散成有限个点光源，通过分段加权叠加方法对多个点光源计算出的初始面型曲线进行叠加得到单个微结构面型，无需后续的优化过程，即可得到透过率较高的视角偏转效果。"}]}]},{"name":"sec","data":[{"name":"sectitle","data":{"title":[{"name":"text","data":"2 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segmentation"}]}],"subcaption":[],"note":[],"graphics":[{"print":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425041&type=","small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425048&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425046&type=","width":"75.01467133","height":"38.60799789","fontsize":""}]}},{"name":"p","data":[{"name":"text","data":"将31条曲线段与对应的权重相乘得到第"},{"name":"italic","data":[{"name":"text","data":"k"}]},{"name":"text","data":"段上叠加后的曲线段"},{"name":"italic","data":[{"name":"text","data":"L"},{"name":"sub","data":[{"name":"text","data":"k"}]}]},{"name":"text","data":"，即有："}]},{"name":"dispformula","data":{"label":[{"name":"text","data":"（3）"}],"data":[{"name":"math","data":{"math":"<math display=\"block\" id=\"M6\"><msubsup><mrow><mi>L</mi></mrow><mrow><mi>k</mi></mrow><mrow/></msubsup><mo>=</mo><mstyle displaystyle=\"true\"><munderover><mo 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surface curve after piecewise weighted superposition"}]}],"subcaption":[],"note":[],"graphics":[{"print":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425069&type=","small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425077&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425073&type=","width":"75.01467133","height":"57.78500366","fontsize":""}]}}]}]},{"name":"sec","data":[{"name":"sectitle","data":{"title":[{"name":"text","data":"3 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film"}]}],"subcaption":[],"note":[],"graphics":[{"print":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425081&type=","small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425090&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425085&type=","width":"75.01467133","height":"35.89866638","fontsize":""}]}},{"name":"fig","data":{"id":"F10","caption":[{"lang":"zh","label":[{"name":"text","data":"图10"}],"title":[{"name":"text","data":"仿真视角曲线"}]},{"lang":"en","label":[{"name":"text","data":"Fig.10"}],"title":[{"name":"text","data":"Simulated perspective curves"}]}],"subcaption":[],"note":[],"graphics":[{"print":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425094&type=","small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425102&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425098&type=","width":"75.01467133","height":"41.95233154","fontsize":""}]}},{"name":"p","data":[{"name":"text","data":"由"},{"name":"xref","data":{"text":"图10","type":"fig","rid":"F10","data":[{"name":"text","data":"图10"}]}},{"name":"text","data":"可以看出，最大亮度视角偏转到了-15º，半亮度视角为（-38.4º，4.4º），偏转后的视角曲线与光源的视角曲线的拟合度很好，没有任何增益出现，并且偏转膜的光线透过率为84.7%。"}]},{"name":"p","data":[{"name":"text","data":"为了与基于点光源"},{"name":"sup","data":[{"name":"text","data":"［"},{"name":"xref","data":{"text":"19","type":"bibr","rid":"R19","data":[{"name":"text","data":"19"}]}},{"name":"text","data":"］"}]},{"name":"text","data":"和后期优化方法进行对比，本文重复了文献［"},{"name":"xref","data":{"text":"19","type":"bibr","rid":"R19","data":[{"name":"text","data":"19"}]}},{"name":"text","data":"］的设计工作，同样的仿真参数设置下得到的视角曲线如"},{"name":"xref","data":{"text":"图11","type":"fig","rid":"F11","data":[{"name":"text","data":"图11"}]}},{"name":"text","data":"所示。可以看到，最大亮度视角为-15°，透过率为75%，在30°处存在增益。和基于点光源的设计方法相比，基于扩展光源的设计方法视角偏转效果更好，光线透过率更高。"}]},{"name":"fig","data":{"id":"F11","caption":[{"lang":"zh","label":[{"name":"text","data":"图11"}],"title":[{"name":"text","data":"基于点光源设计的偏转膜仿真视角曲线"}]},{"lang":"en","label":[{"name":"text","data":"Fig.11"}],"title":[{"name":"text","data":"Simulated viewing angle curves of deflection film based on point light source"}]}],"subcaption":[],"note":[],"graphics":[{"print":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425107&type=","small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425114&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425110&type=","width":"75.01467133","height":"41.57133484","fontsize":""}]}}]},{"name":"sec","data":[{"name":"sectitle","data":{"title":[{"name":"text","data":"4 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microscope"}]}],"subcaption":[],"note":[],"graphics":[{"print":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425118&type=","small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425128&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425125&type=","width":"75.01467133","height":"35.13666534","fontsize":""}]}},{"name":"p","data":[{"name":"text","data":"使用光学特性自动测量仪测试不加偏转膜和加偏转膜两种情况下背光模组的视角曲线，测试使用的偏转膜尺寸为7 cm×7 cm，基底是厚度为190 μm的PET，测试时将偏转膜贴在背光模组的最上层，也就是扩散膜上。如"},{"name":"xref","data":{"text":"图13","type":"fig","rid":"F13","data":[{"name":"text","data":"图13"}]}},{"name":"text","data":"所示，加偏转膜后垂直方向的最大亮度视角由0°方向偏转到-16°；半亮度视角由（-23.8°，27.4°）变为（-43°，9.4°）；最大亮度由411 900 nit降低到341 900 nit，光线透过率为83.0%。-16°处亮度由293 695 nit提高到了341 900 nit，增加了16.4%，提升了指定视角上的亮度；0°方向视角亮度由411 900 nit降低到244 500 nit，下降了40.64%。"}]},{"name":"figgroup","data":{"id":"F13","caption":[{"lang":"zh","label":[{"name":"text","data":"图13"}],"title":[{"name":"text","data":"垂直方向的视角曲线"}]},{"lang":"en","label":[{"name":"text","data":"Fig.13"}],"title":[{"name":"text","data":"Vertical viewing angle curves of BLU"}]}],"note":[],"layout":"1;2;","grid":[[{"name":"fig","data":{"id":"F13a1","caption":[{"lang":"zh","title":[]}],"subcaption":[],"note":[],"graphics":[{"print":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425132&type=","small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425139&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425134&type=","width":"75.01467133","height":"53.00133133","fontsize":""}]}},{"name":"fig","data":{"id":"F13a2","caption":[{"lang":"zh","title":[]}],"subcaption":[],"note":[],"graphics":[{"print":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425143&type=","small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425150&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425147&type=","width":"75.01467133","height":"57.32664871","fontsize":""}]}}]],"alternatives":{"small":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425158&type=","big":"http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=17425153&type=","width":"76.90000153","height":"117.83198547","fontsize":""}}}]},{"name":"sec","data":[{"name":"sectitle","data":{"title":[{"name":"text","data":"5 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