LCD增亮膜及幅面薄膜传送工艺的研究
摘要
LCD增亮膜是随着液晶显示器的兴起而诞生的新型光学薄膜,其被广泛的运用于消费电子、通讯及移动办公等领域。它的诞生解决了液晶显示器光的利用率底、能耗大、显示亮度低的问题,使LCD的显示从导光板到最终利用率由最初的不足10%提到到现在的90%以上。
增量膜产业俗称为BEF(Brightness Enhance Film),由3M最早发明的棱镜膜而命名,棱镜膜是利用微复技术和薄膜技术在聚酯表面上形成精密的丙烯酸树脂棱镜结构,特殊的棱镜结构使光经过多次反射后被有效地利用。此外,3M还开发了的多层光学膜(Multilayer Optical Film)技术,这种多层膜由上百层纳米级的膜组成,每一层的材料性质都不同,通过膜层间的光学作用控制光的出射最终达到反射光的功能。
3M VikuitiTM增亮膜主要分为三大类,即BEF棱镜膜、多层膜结构的反射型偏光片DBEF以及增强型镜面反射型膜ESR。随着液晶屏降价趋势,背光源厂纷纷寻求低成本的产品及替代品,应此,增量膜目前主要的竞争在于新产品的推陈出新及量产产品的成本控制。本论文我们将围绕三大类产品的产品结构、物理特性、光学特性及其工作原理展开讨论。并就增亮膜家族的新成员cGD在本土化资格评估时的过程进行详细的介绍,通过对比实验,验证其量产化的可行性。
幅面薄膜传送工艺是增亮膜生产过程中的重要部分,薄膜传送过程中张力控制区的确定及控制类型的选取优为关键,依据增亮膜加工工艺各段工艺特点我们将阐述如何进行有效的张力控制?并结合BEFIIIM2的翘曲问题进行实验研究,提出相应的解决方案。
LCD brightness enhance film is new type of optical film came forth with Liquid Crystal Display, which is widely applied on the fields of consume electron, communication, telecommuting and so on. The birth of LCD BEF Film resolved such problem as higher energy consumption, weaker display luminance and lower utilization rate of light, it improved final using rate of backlight from original less than 10% to 90% above.
The popular name of brightness enhance film is, BEF, which is denominated by the first prism film 3M invented. On prism film, exact prism structures of crylic acid are form on polyester base through micro-reprography and film technology, special prism structure have recycle using for backlight many times. Furthermore, 3M also developed multilayer optical film, which construct of hundreds of film of namo level and each different layer with different material property for reflecting light control.
3M VikuitiTM optical films mainly classify as the following three types of BEF prism film, multilayer DBEF(Dual Brightness film) and multilayer ESR (Enhanced Specular Reflector). Followed by LCD cost down, backlight factory seek lower price BEF film and its’substitution, therefore, primary competition for BEF optical film faced are development of new products of high optical performance and attractive price. In this report, we will study product structures, physical property, optical property and operation principles spread around 3M VikuitiTM optical films, and demonstrate local qualification process for cGD of new type of BEF optical film. Through comparison study with competitive optical film, we will verify competitive ability in market.
Normally, web transportation and tension control can not be deviated from optical film production line, it’s crucial segment in each individual process. However control zone determination and control strategy selection are uppermost steps for web tension control. According to difference of each individual process of web line, this report will show how to determine web control zone and how to do an effective web tension control based on BEF laminating process. Besides aim to curl issue of BEFIIIM2, we will demonstrate solution through total process analysis and experimental test.
增量膜产业俗称为BEF(Brightness Enhance Film),由3M最早发明的棱镜膜而命名,棱镜膜是利用微复技术和薄膜技术在聚酯表面上形成精密的丙烯酸树脂棱镜结构,特殊的棱镜结构使光经过多次反射后被有效地利用。此外,3M还开发了的多层光学膜(Multilayer Optical Film)技术,这种多层膜由上百层纳米级的膜组成,每一层的材料性质都不同,通过膜层间的光学作用控制光的出射最终达到反射光的功能。
3M VikuitiTM增亮膜主要分为三大类,即BEF棱镜膜、多层膜结构的反射型偏光片DBEF以及增强型镜面反射型膜ESR。随着液晶屏降价趋势,背光源厂纷纷寻求低成本的产品及替代品,应此,增量膜目前主要的竞争在于新产品的推陈出新及量产产品的成本控制。本论文我们将围绕三大类产品的产品结构、物理特性、光学特性及其工作原理展开讨论。并就增亮膜家族的新成员cGD在本土化资格评估时的过程进行详细的介绍,通过对比实验,验证其量产化的可行性。
幅面薄膜传送工艺是增亮膜生产过程中的重要部分,薄膜传送过程中张力控制区的确定及控制类型的选取优为关键,依据增亮膜加工工艺各段工艺特点我们将阐述如何进行有效的张力控制?并结合BEFIIIM2的翘曲问题进行实验研究,提出相应的解决方案。
LCD brightness enhance film is new type of optical film came forth with Liquid Crystal Display, which is widely applied on the fields of consume electron, communication, telecommuting and so on. The birth of LCD BEF Film resolved such problem as higher energy consumption, weaker display luminance and lower utilization rate of light, it improved final using rate of backlight from original less than 10% to 90% above.
The popular name of brightness enhance film is, BEF, which is denominated by the first prism film 3M invented. On prism film, exact prism structures of crylic acid are form on polyester base through micro-reprography and film technology, special prism structure have recycle using for backlight many times. Furthermore, 3M also developed multilayer optical film, which construct of hundreds of film of namo level and each different layer with different material property for reflecting light control.
3M VikuitiTM optical films mainly classify as the following three types of BEF prism film, multilayer DBEF(Dual Brightness film) and multilayer ESR (Enhanced Specular Reflector). Followed by LCD cost down, backlight factory seek lower price BEF film and its’substitution, therefore, primary competition for BEF optical film faced are development of new products of high optical performance and attractive price. In this report, we will study product structures, physical property, optical property and operation principles spread around 3M VikuitiTM optical films, and demonstrate local qualification process for cGD of new type of BEF optical film. Through comparison study with competitive optical film, we will verify competitive ability in market.
Normally, web transportation and tension control can not be deviated from optical film production line, it’s crucial segment in each individual process. However control zone determination and control strategy selection are uppermost steps for web tension control. According to difference of each individual process of web line, this report will show how to determine web control zone and how to do an effective web tension control based on BEF laminating process. Besides aim to curl issue of BEFIIIM2, we will demonstrate solution through total process analysis and experimental test.
引文
【1】3M Corporate, 3M Vikuiti TM Brightness Enhancement Film Product Structure, March 2005
【2】3M Corporate, 3M Vikuiti TM Dual Brightness Enhancement Film Product Structure, March 2005
【3】3M Corporate, 3M Corporate Enhanced Specular Reflector Product Structure, March 2005
【4】3M China, 3M Optical Film Seminar Presentation File, February 2007,
【5】蔡履中,光学,第三版,北京:科学出版社,2007,75:116
【6】3M Korea, China, cGD Internal Evaluation for ADTC, 2007
【7】3M Corporate, 3M Vikuiti TM BEFII90/50 180-635mm Dialog,Jun 2007
【8】Jim Dobbs,Web – Transport & Tension Control, 3M Corporate Process Research Laboratory, September 2007
【9】Jim Dobbs,Web Handling Miniclasses, 2nd Edition, 3M Corporate Process Research Laboratory, September 2007
【2】3M Corporate, 3M Vikuiti TM Dual Brightness Enhancement Film Product Structure, March 2005
【3】3M Corporate, 3M Corporate Enhanced Specular Reflector Product Structure, March 2005
【4】3M China, 3M Optical Film Seminar Presentation File, February 2007,
【5】蔡履中,光学,第三版,北京:科学出版社,2007,75:116
【6】3M Korea, China, cGD Internal Evaluation for ADTC, 2007
【7】3M Corporate, 3M Vikuiti TM BEFII90/50 180-635mm Dialog,Jun 2007
【8】Jim Dobbs,Web – Transport & Tension Control, 3M Corporate Process Research Laboratory, September 2007
【9】Jim Dobbs,Web Handling Miniclasses, 2nd Edition, 3M Corporate Process Research Laboratory, September 2007