液晶基板玻璃厚度的测量方法

厚度是液晶基板玻璃生产过程中一项重要的品质指标。随着液晶基板玻璃尺寸越来越大,生产节拍要求越来越短,传统的手动式测量已不能满足生产需求。本文总结了作者实际研发的使用接触式或非接触式传感器的在线自动测厚仪的设计使用经验,说明了激光三角法和干涉法非接触式测厚的原理,电涡流/光栅尺式接触式测厚的原理,并根据实际使用情况,分析了各种方式面临的主要问题以及各自的优缺点,并提出了各种方式的使用领域。作者研发的多台在线自动测厚仪均已成功应用到本公司现有生产线中,效果良好。     

浅谈液晶玻璃生产中厚度的测量方式

液晶基板玻璃厚度是液晶玻璃生产过程中一项重要的品质指标,是后续面板厂加工应用良品率的关键性因素。随着液晶基板玻璃代次的提高,玻璃尺寸越来越大,生产节拍要求越来越短,自动化程度及人工成本越来越高,传统的手动式测量已不能满足生产需求。最新开发的在线式自动化测厚采用传感器检测方式,通过机械与电气的相互配合,将数据反馈至前端工序供生产参考。前端工序通过将在线数据与离线数据做比较,和在线数据大量采集的趋势性,对玻璃厚度做出调整。目前主要分为接触式与非接触式两种测量方式,均已成功应用到本公司现有生产线中,起到了良好的效果。     

液晶玻璃基板切割缺陷分析与对策

随着液晶玻璃基板行业的不断进步,逐步向大尺寸、超薄化发展,对液晶玻璃基板的品质需求也日益提高。由于玻璃基板行业竞争日益强烈,对生产型企业来说,提升玻璃基板品质尤为关键。为降低液晶玻璃基板在生产过程切割缺陷造成加工边部品质波动,从切割、掰断原理、缺陷分类、缺陷影响因素及对策方法展开深入研究,并通过实践加以论证,为液晶玻璃基板生产中切割缺陷分析与对策提供正确思路,提升液晶玻璃基板切割品质及良率。     

液晶玻璃基板应力分析与对策

光电产业对液晶基板玻璃的要求向超薄化、高清晰、全面屏发展,对液晶玻璃基板的品质需求也日益提高。由于玻璃基板行业竞争日益强烈,对生产企业来说,提升玻璃基板品质尤为关键。为降低TFT-LCD液晶玻璃生产过程中因退火温度不均、厚薄差异大、形状不稳、环境压差波动及切割晃动造成成型品质应力的波动,从溢流下拉法生产原理、应力分类、应力影响因素及对策方法展开深入研究,并通过实践加以论证,为TFT-LCD液晶玻璃生产中应力分析与对策提供正确思路,同时提升高效对策,促进行业健康稳定发展。     

液晶玻璃横切切割质量的研究分析

本文从切割原理及其影响因素展开研究,并通过刀轮选型和清洁、试作加以论证,为液晶玻璃基板生产中切割质量分析提供正确思路,从而提升液晶玻璃基板切割品质及良品率。     

液晶面板生产成本将会明显降低

液晶电视产业链从上往下包括液晶玻璃基板、液晶面板、液晶模组、整机等环节,其中最重要的核心部件——液晶玻璃基板还处于国外公司的“技术封锁”状态中,使得中国液晶电视行业一直受制于人。     

液晶级高纯锶盐现状及发展趋势

介绍了液晶玻璃基板用途,分析了中国液晶玻璃基板发展现状和发展趋势,预测了作为玻璃基板的原料之一的液晶级高纯锶盐的市场需求。详细介绍了液晶级高纯锶盐的生产工艺和主要特点,以及技术发展趋势。重点介绍了中国液晶级高纯锶盐的生产现状,预测了国内液晶级高纯锶盐市场未来的发展前景,同时提出了行业发展存在的问题及建议,旨在促进液晶级高纯锶盐的可持续、健康发展。     

液晶面板生产成本将会明显降低

液晶电视产业链从上往下包括液晶玻璃基板、液晶面板、液晶模组、整机等环节,其中最重要的核心部件一液晶玻璃基板还处于国外公司的“技术封锁”状态中,使得中国液晶电视行业一直受制于人。     

液晶基板玻璃的应力测定研究

为了保证玻璃使用时的安全,对各种玻璃制品都规定其残余的内应力不能超过某一规定值。所以在玻璃生产过程中,应力测量是不可或缺的一部分,本文介绍了液晶玻璃基板应力测量的机理。     

玻璃基板热收缩率测量方法浅析

随着显示技术向高分辨率发展,TP(Total Pitch)成为面板品质的关键控制指标之一,对玻璃基板的品质提出了更高的要求,尤其是LTPS制程中的热收缩性能已成为玻璃基板的核心指标之一。热收缩性能现有5种测试方法:划线对比法、膨胀法、激光法、密度法、拉丝法。通过分析每种方法的优缺点,提出了划线对比法、膨胀法、激光法的改进方向。     

激光光谱法同步测量尿素水溶液液膜厚度与浓度

对尿素水溶液液膜厚度和浓度进行定量分析在工业应用中至关重要,而传统的测量方法只能对液膜厚度和浓度分别进行测量。提出了一种用于尿素水溶液液膜厚度和浓度高精度同步在线测量的新方法。通过灵敏度分析和内部交叉验证,选取了测量精度及灵敏度最高的一对波长组合(7040.75 cm^-1 与 6761.00 cm^-1)。由内部交叉验证可知,该方法测量液膜厚度误差小于1.40%,浓度误差小于5.76%。     

浅谈应变调光玻璃

简介现有电控调光玻璃技术,叙述应变调光玻璃专利技术系列新产品结构、原理和应用设想,认为应变调光玻璃可望引领廉价节能调光玻璃新技术革命。     

Drying of Granular Ceramic Films: I, Effect of Processing Variables on Cracking Behavior

Drying of binder-free granular ceramic films was studied to identify processing variables which affect their cracking behavior. Films were prepared from electrostatically stabilized suspensions of α-alumina in water. A critical cracking thickness (CCT) was determined, above which films would spontaneously crack during drying. The effects of particle size, liquid surface tension, drying rate, dispersion stability, and sedimentation time were evaluated by a statistical design methodology. The CCT for films prepared on glass substrates was used as a measure of the effect of each variable on cracking. The statistically significant variables were particle size, dispersion stability, and sedimentation time. The effect of substrate constraint was also studied by producing films on a Teflon substrate and a pool of liquid Hg. The observations were consistent with a capillary formed tensile stress acting on the entire film rather than differential stress generated by a moisture gradient over the film thickness.     

塑料微管壁厚的在线测量方法

根据几何光学原理,在平行光束透射下,对塑料微管进行了光路分析。从理论上计算出微管的外径和内径与入射光线位置、折射率和偏移量之间的数量关系。并论述了利用点激光光源测量微管壁厚的方法。该方法可以一次测量出多个截面的壁厚数据,具有简单可靠等特点,适用于非接触式的在线测量。     

液晶玻璃窑炉全氧燃烧技术探讨

全氧燃烧技术的应用是玻璃工业史上的一次重要突破,液晶玻璃窑炉一般采用电加热和全氧燃烧相结合的混合加热方式,对配合料进行加热,使之熔化成满足要求的高温玻璃液。主要探讨液晶玻璃窑炉全氧燃烧技术的优点、使用前测试、燃气分配比例和使用注意事项等。     

Drying dynamics of polymers films by an interferometric technique

We analyze a simple laser reflectivity measurement as a tool to monitor the drying kinetics of transparent polymer films. The reflectivity signal of a laser beam at normal incidence shows oscillations due to interference arising from multiple reflection of the laser light within the drying film. We develop a model to interpret the reflectivity curves in terms of time evolving refractive indices at the top and bottom of the film. We present results of the drying kinetics of transparent alkyd films on a glass substrate of high refractive index. Data shows a clear hallmark indicating the evolution of the crosslinking process. From the reflectivity curves, the time evolution of the refractive indices at the top and bottom is obtained. Assuming a linear-gradient of the refractive index along the depth of the film the average refractive index and consequently the film thickness as a function of time are estimated. Clear features in the time evolution of the refractive indices and thickness, correlate well with qualitative “dust”, “touch” and “fingerprint” drying times. Additionally, we present some preliminary results for water based latex binders, where scattering of light is present, showing that this simple optical technique could be extended for studying latex film formation.     

Effect of TiO2 thin film thickness and specific surface area by low-pressure metal–organic chemical vapor deposition on photocatalytic activities

TiO₂ photocatalyst films having an anatase crystal structure with different thickness were prepared by the low-pressure metal–organic chemical vapor deposition (LPMOCVD) to examine the effect of growth conditions on photocatalytic activity. Film thickness was linearly proportional to the deposition time. Structure of the film was strongly dependent on the deposition time. In early stage of deposition, fine particles deposit on the substrate. As increasing the deposition time, crystal orientation is gradually selected following the Kolmogorov model and c-axis oriented columnar crystals become dominant. The photocatalytic activity strongly depends on the film deposition time (or film thickness) in nonlinear way. The optimum thickness of TiO₂ catalyst film grown by LPMOCVD may locate between 3 and 5 μm.     

双向稳流拉薄法生产0.75 mm超薄浮法玻璃之实践

浙江玻璃股份有限公司在生产实践的基础上,研发出"双向稳流拉薄法",成功地生产0.75mm超薄浮法玻璃,其厚薄差和微观波纹度均达质量指标要求.本文将从合理使用拉边机、稳定锡液对流、稳定玻璃液流等方面所采取的有效措施作一些介绍.