TFT-LCD用彩色滤光片

彩色滤光片作为液晶显示器件的关键组件,其性能直接影响显示器的对比度、亮度、视角乃至画面质量。本文阐述LCD用彩色滤光片的结构、特性和制取方法,着重介绍目前最常用的制取彩色滤光片的颜料分散法。彩色滤光片产业属于技术密集型产业,只有掌握相关的技术知识,打破国外在颜料领域的垄断,拥有自主知识产权,才能带动国内整个行业的发展。     

荫罩黑化因素导致低玻膜脱落原因分析与对策

本文主要讲述了彩管用荫罩在黑化处理过程中，黑化膜质发生劣化造成低玻膜脱落的原因。     

彩色滤光片用颜料细化工艺研究

彩色滤光片是液晶显示器实现彩色显示的部件,而颜料光阻是彩色滤光片的关键材料,占彩色滤光片成本的27%左右。在颜料光阻内作为着色剂的光阻颜料,其性能好坏直接决定了颜料光阻的性能,因此本文在介绍彩色滤光片的基础上,对颜料的细化工艺进行深入研究。     

一种斜入射多膜窄带滤光片透射特性分析

垂直入射的多膜窄带滤光片两偏振态的透射特性是相同的,而对于斜入射的多膜窄带滤光片,其两种偏振态的透射特性发生分离.本文对于所设计的155层三腔薄膜窄带滤光片,分为(无吸收)垂直入射、(无吸收)有角度(11.5°)入射、(有吸收)有角度(11.5°)入射三种情况的透射率随波长变化关系进行了分析.模拟图形结果显示了透射特性的变化趋势.     

窄带全介质膜滤光片的转值监控

本文用精确的和近似的方法,从理论上研究了转值法控制膜厚的误差对全介质干涉滤光片性能的影响。虽然该法控制单层膜的精度很差,但峰值频率的理论精度和窄带滤光片总性能极高。因此,实际生产的滤光片性能差的原因不象是该法固有局限性所致,而是使用方法不当或与控制方法无关的其他因素造成的。     

多色滤光片研究

本文将单色滤光片的概念引深,进而得出多色滤光片,并且具有普遍性,即单邑滤光片将作为多色滤光片的一种特殊情况寓于多色滤光片之中,多色滤光片膜系将成为窄带滤光片的普遍形式,文章最后叙述了多色滤光片膜系诸参量与滤光片光谱特性的关系。     

TFT-LCD光致发绿不良改善、机理分析及研究

广色域TFT-LCD产品需要使用高颜料浓度的RGB色阻,光照状态下易于发生发绿不良,严重影响TFT-LCD显示器件的视觉效果。通过研究不同成分的色阻制成的TFT-LCD与光电测试样板在光照前后的发绿情况以及光电特性变化,确定TFT-LCD光致发绿不良源于绿色色阻中含有的金属酞箐类G颜料,且不良程度与绿色色阻中G颜料含量强关联。此类颜料具有共轭结构与半导体特性,光照状态下发生电子迁移,导致介质损耗因数升高,影响TFT-LCD的耦合电场,进而导致RGB像素亮度的差异化,形成光致发绿不良。依托方法:(1)在保证TFT-LCD样品色度规格的前提下,通过广色域G颜料以降低绿色色阻中的G颜料含量;(2)使用高敏感度的光起始剂,可以有效改善TFT-LCD产品的光致发绿不良,尤其方法(1)更为有效。本文建立TFT-LCD显色核心的彩色滤光片RGB色阻成分管理基准,同时搭建光致发绿不良的生产线与实验室评价体系,为后续色阻材料开发提供理论指导。     

红外探测器用滤光片的技术现状及应用

近红外滤光片和中红外带通滤光片在航天、气象和遥感等领域都有重要的应用。红外滤光片是让红外光透过而使其他波长光截止的滤光片,它的主要指标是峰值透过率。带通滤光片的重要指标是峰值透过率和通带半宽度。光学薄膜的膜系结构和具体设计对这些指标起决定性作用。本文主要介绍这两种滤光片的几例实际运用。     

按多层干涉滤光片的峰值漂移测定蒸镀膜层光学厚度的变化

本文介绍一种干涉滤光片光学厚度变化的测定法,这种变化是在滤光片蒸镀后经过一定过程(如暴露于空气或热处理等)时常在其膜层中产生的。此方法是根据法布里-珀罗多层干涉滤光片蒸镀后由于上述处理引起的峰值漂移进行的,并已求得其峰值漂移公式。此法已用于测定MgF_2和ZnS膜层蒸镀后暴露于空气中的光学厚度的变化。已证实,所得结果对计算上述膜层形成的其他多层滤光片的透过率-波长特性的变化是有价值的。     

长波滤光片(一)——15微米窄带滤光片

1.1引言根据美国空军No.AF61(052)-833号合同,里丁(Reading)大学和格·巴公司(Gr-ubb Parsons)研制红外多层膜干涉滤光片要达到如下目的: (1)确定适用作0.8～100微米区多层膜干涉滤光片材料的光学性质; (2)用上述适当材料设计、试制和制造滤光片; (3)设计和制造75、85和95微米多层膜滤光片各二片,滤光片的半宽≤10微米,透过率≥50％。     

发育期黄肉桃色素、质体细胞学和叶绿素荧光的变化

为探究发育期黄果肉桃果实质体发育情况，以黄肉桃‘23－40’为研究对象，对发育期桃果实，分别采用分光光度法测定色素变化，冷冻切片法观察质体的形态，Mini?Imaging?PAM叶绿素荧光成像仪测定不同区域叶绿素荧光。结果表明：（1）随着果实发育，光合色素组分处于动态变化之中，叶绿素a（ Chl． a）、叶绿素b（ Chl． b）含量、Chl． a／b和Chl．（a＋b）／Car．（类胡萝卜素）均下降，而类胡萝卜素（Car．）和花青素（Ant．）含量上升。（2）盛花后65天，桃果实表皮下第4～12层果肉细胞分布大量叶绿体，且叶绿体数量由外向内逐渐减少；随着发育，叶绿体体积缩小，数量下降，类胡萝卜素的积累使质体由绿色向黄色转变，果实成熟后，质体类囊体解体，叶绿体转化为有色体。（3）随着果实发育，桃中果皮捕光能力和光合潜力逐渐减弱，叶绿体的光能利用效率先上升后下降；且果实中果皮外侧的荧光活性比内侧强，成熟桃果实中果皮基本不具备光合能力。这些结果暗示黄肉桃发育过程中色素成分含量、质体形态分布和光合能力具有时空差异。     

High color rendering index and chromatic-stable white organic light emitting diodes incorporating excimer and fluorescence emission

We developed high color rendering index (CRI) white organic light emitting diodes (WOLEDs) by the incorporation of yellow or green fluorescence emission located between the monomer and excimer emission of platinum [1,3-difluoro-4,6-di (2-pyridinyl) benzene]chloride (Pt-4). The devices comprising yellow or green fluorescence emission exhibited a maximum CRI of 92 and 94, respectively. Meanwhile, the devices showed excellent chromatic stability and low efficiency roll-off. We attribute the high CRI to the perfect spectrum complement and the relative intensity adjustment between two emission layers (EMLs). The mechanism of triplet excition confinement plays a crucial role in the suppression of chromaticity shifting and efficiency roll-off.     

可见光波段的窄带导模共振滤光片的设计

为了使导模共振滤光片能在可见光范围内表现出良好的滤光效果,根据严格耦合波理论和等效介质理论,提出基于半导体材料单晶氧化锌薄膜的亚波长导模共振光栅滤光片的结构设计。通过仿真分析可知,该滤光片在可见光范围内的475nm,530nm与650nm波长处,反射效率都达到了100%,旁带反射率低于4%,并且峰值带宽均小于0.3nm。结果表明,该滤光片能分别在可见光的红、绿、蓝波段表现出良好的滤光效果,可以作为三基色的滤光片,在彩色合成与调制中得到重要的应用。     

Axial and radial fluorescence of dye-doped polymer fiber

Fluorescence spectra of perylene-doped polymer fiber were measured in both radial and axial directions, i.e., for leaky and guided beams, by exciting the fiber with a pulsed laser of 460-540-nm wavelength. Green (540-550 nm) and yellow (580 nm) peaks were observed in the radial fluorescence spectrum. Measuring fluorescence change at positions closer to the input end and progressing forward to the output end, we observed that green fluorescence decreased rapidly corresponding to an attenuation constant at incident laser wavelength. In contrast, yellow fluorescence decreased gradually, because it was induced by the absorption of green fluorescence, which attenuated more gradually than incident laser. Therefore, in axial output beams, green fluorescence was much weaker than yellow. As incident laser power increased, intensities of axial green fluorescence and radial fluorescence (both green and yellow) saturated to a certain level. In contrast, axial yellow fluorescence increased nonlinearly with increase in laser power. The output light intensity became strongest at a fiber length of 20-30 mm. These phenomena were analyzed theoretically taking self-absorption and stimulated emission by fluorescent dyes into consideration     

彩色形态滤波器分析

形态滤波属于非线性信号变换处理,它利用信号的局部特征对信号进行修正。最近的研究表明形态滤波器能有效地滤除二值图像及灰度图像中的噪声,本文引入了建立在ＲＧＢ彩色空间上的彩色形态变换,针数字形态学理论从灰度空间扩展到彩色空间,对基本彩色形态滤波器（即彩色形态闭、开）及以它们为基础所构造出一些复杂的彩色形态滤波器进行了研究,并对它们选用不同结构元素的情况进行了分析,实验表明彩色形态滤波器能直接有效地消除     

Utilizing white OLED for full color reproduction in flat panel display

Full color reproduced by white OLED (organic light emitting diodes) coupled with transmission color filters for the application in flat panel display was analyzed theoretically and experimentally. A white emitter made up of three primary emission peaks was found to be superior to a white emitter made up of complementary colors, i.e. two emission peaks. However, though the full color reproduction by white emitter possesses the merit of manufacturing simplicity, it is much worse than the color reproduction by three individual primary color sub-pixels, in terms of power efficiency and the power consumption. Adjusted to the same external quantum efficiency, the full color pixel made of three primary color sub-pixels is 10 times more efficient than that made of white emitter coupled with color filters.     

无机红,绿,蓝滤色膜的设计和制备

本文阐述了应用在Ｔｒｉｎｉｃｏｎ管中的二氧化钛无机红、绿,蓝滤色膜的的设计和制备。研制的红滤色膜透过率达到８０％以上,蓝滤色膜透过率达到７５％以上,绿滤色膜透过率达到６５％以上。这类无机滤色膜也可用于其它成像和显示器件。     

三基色滤光片的设计

为了得到纯正的三基色,以实现大色域显示功能,采用光学薄膜技术的传递矩阵方法进行了模拟计算,分别得到红、绿、蓝三色的F-P滤光片,并将其叠加在一起,得到将显示光源中杂色滤除、留下三基色的滤光片。结果表明,三基色滤光片很好地满足了设计要求,如果应用于显示技术,可以很好地提高显示器的彩色显示功能。     

Light‐Harvesting Fluorescent Supramolecular Block Copolymers Based on Cyanostilbene Derivatives and Cucurbit[8]urils in Aqueous Solution

A novel system of light‐harvesting supramolecular block copolymers (SBCPs) in water is demonstrated. To realize cucurbit[8]uril (CB[8])‐based SBCPs generating artificial light‐harvesting in water, finely color‐tuned supramolecular homopolymers (SHPs) comprising CB[8] host and different cyanostilbene guests (named as B , G , Y , and R ) emitting blue, green, yellow, and red fluorescence are first synthesized and characterized, respectively. Light‐harvesting SBCPs with mixed guest emitters are then simply produced by mixing blue and red‐emitting SHPs according to the dynamic host–guest exchange interaction. The light‐harvesting SBCPs show highly efficient energy transfer from B (donor D) to R (acceptor A) attributed to the D/A proximity and parallel orientation of their transition dipoles secured in the block copolymer structure. It is comprehensively shown that cyanostilbene/CB[8]‐based fluorescent SBCPs represent a novel and fascinating class of eco‐friendly artificial light‐harvesting system.     

三芯片集成高显色指数白光LED的研究

运用基于蒙特卡罗的光线追迹方法,对采用"光转换"兼"多色混合"技术的白光LED的显色指数、相关色温、光通量、光辐射功率、荧光粉颗粒密度和色坐标进行了仿真计算和优化选择。通过改变红、绿、蓝三种LED芯片的组合方式和红、绿、黄三种荧光粉的混合方式及各色荧光粉的密度,在保证有合理的光通量输出的条件下,得到了不同色温区的高显色指数白光LED。从显色指数角度看,冷白、正白和暖白光应分别选择BBB芯片+绿、红色荧光粉、BBB芯片+黄、红色荧光粉和RBB芯片+黄色荧光粉组合。实验上测试了采用这几种组合方式的白光LED光谱、显色指数、色温、光通量和色坐标,实验数据与仿真结果基本吻合。