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Do LCDs have a chance to keep a leading position on flat panel display market? 液晶显示器是否有机会在平板显示器市场上保持领先地位?
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581128
J. Zieliński, M. Olifierczuk
{"title":"Do LCDs have a chance to keep a leading position on flat panel display market?","authors":"J. Zieliński, M. Olifierczuk","doi":"10.1117/12.581128","DOIUrl":"https://doi.org/10.1117/12.581128","url":null,"abstract":"A lot of significant discoveries and inventions in the field of technology of displays were made in the latter part of the twentieth century. Apart from well-known CRT, the plasma-, luminescence- and liquid crystal-displays are commercially available. One can notice that a leading position on that flat panel displays market belong to LCD. But the progress in Organic LED materials and devices is impressive. Threshold voltage for light emission have fallen from several thousands V to just 2 - 3 V for today's OLEDs (polymer and small molecule). Luminous efficiency has increased from 0,01 to more than 10 lm/W. These improvements have brought PLED technology to the point where serious consideration is being given to OLED graphic and video display product. The question given some years ago by Dr. M. E. Becker, [Display Metrology and Systems]: \"...is the current OLED enthusiasm justified because OLED displays feature significant improvements in visual and ergonomic performance, and because they are much cheaper to manufacture; Or it is just another hope for those who missed the LCD train?...,\" is trite. During SID Conference in Baltimore in 2003 two companies claiming to have built the largest organic LED. International Display Technology demonstrated a 20 inch display driven by \"super amorphous silicon\" technology; Sony showed off its 24 inch screen, which consists of a 2x2 tiled array of OLED displays. The presented work will be oriented towards specifying the characteristic features of liquid crystal and electro luminescence organic compounds which make these groups of displays so attractive and prospective among other imagery systems devices existing nowadays.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131347239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Peculiar properties of LC orientation by thin inorganic oxide films obtained by glow discharge plasma 发光放电等离子体制备的无机氧化薄膜的LC取向特性
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581212
Y. Kolomzarov, P. Oleksenko, V. Sorokin, P. Tytarenko, R. Zelinskyy
{"title":"Peculiar properties of LC orientation by thin inorganic oxide films obtained by glow discharge plasma","authors":"Y. Kolomzarov, P. Oleksenko, V. Sorokin, P. Tytarenko, R. Zelinskyy","doi":"10.1117/12.581212","DOIUrl":"https://doi.org/10.1117/12.581212","url":null,"abstract":"Orienting properties of thin inorganic oxide films created by the method of reactive cathode sputtering in glow discharge plasma are demonstrated. The quality of homogeneous and twist alignment of nematic LC was evaluated by polarization microscopy methods. For comparison of orienting properties of silicon oxide films, the parameter of twist orientation quality was used, and its dependence on technological parameters of sputtering (such as cathode voltage, discharge current density, deposition angle, content of gas atmosphere) was shown. The morphologies of SiOx orienting layers deposited on substrates with different coatings are demonstrated.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"292 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120885941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
AFM study of some isothiocyanato-compounds and their binary mixtures 一些异硫氰酸酯化合物及其二元混合物的原子力显微镜研究
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581139
B. Wazynska, J. Okowiak, M. Woźniak
{"title":"AFM study of some isothiocyanato-compounds and their binary mixtures","authors":"B. Wazynska, J. Okowiak, M. Woźniak","doi":"10.1117/12.581139","DOIUrl":"https://doi.org/10.1117/12.581139","url":null,"abstract":"AFM studies of mixtures with different smectic A, B and E phase were done. Compounds with terminal NCS group were used. AFM images were obtained for liquid crystals samples spread on mica surface or mica covered by polyvinyl alcohol in order to examine the influence of molecular orientation.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128215144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and mesomorphic properties of 5,10,15,20-tetra(aminophenyl)porphin derivatives on the basis of 3,4,5-trihydroxybenzoic acid 基于3,4,5-三羟基苯甲酸的5,10,15,20-四(氨基苯基)卟啉衍生物的合成及介形性质
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581076
V. Bykova, M. Zharova, A. Semeikin, T. Karmanova, N. Usol'tseva
{"title":"Synthesis and mesomorphic properties of 5,10,15,20-tetra(aminophenyl)porphin derivatives on the basis of 3,4,5-trihydroxybenzoic acid","authors":"V. Bykova, M. Zharova, A. Semeikin, T. Karmanova, N. Usol'tseva","doi":"10.1117/12.581076","DOIUrl":"https://doi.org/10.1117/12.581076","url":null,"abstract":"The synthesis and investigation of mesomorphic properties of 5,10,15,20-tetra(aminophenyl)porphin derivatives on the basis of 3,4,5-trihydroxybezoic acid were carried out to study the influence of molecular structure geometry on thermotropic and lyotropic mesomorphism in a number of organic solvents. Introduction of two bulky fragments into R1 position (X, XI) or four bulky fragments into R1 and R2 (XII, XIII) positions (in case of meta- or ortho-substitution of benzene rings) leads to emerging of monotropic mesophase. Tetra-substitution of porphyrine cycle in the para-position of the benzene ring (compound XIV) reveals the enantiotropic mesophase. The influence of bulky fragments on the glass-forming capacity of the compounds was researched.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130729956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selective reflection of light in binary mixtures with different types of smectic A phase 不同类型近晶A相二元混合物中光的选择性反射
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581082
M. Tykarska
{"title":"Selective reflection of light in binary mixtures with different types of smectic A phase","authors":"M. Tykarska","doi":"10.1117/12.581082","DOIUrl":"https://doi.org/10.1117/12.581082","url":null,"abstract":"In the mixtures of chiral compounds in which smectic A phase exists in limited range of concentration the selective reflection of light for compositions without smectic A phase can be from red to blue the same as above smectic phase or from blue to red as in mixtures without smectic phase. To check either the type of smectic A phase of the phenomenon of phase induction are responsible for the difference in the light colour sequence polar compounds having chiral nematic phase were mixed with compounds having nonpolar ('classic') smectic A phase or polar A1 or Ad smectic phases in lower temperatures than chiral nematic phase (in these systems the smectic phase was destabilized) or with compounds having nematic phase chosen in such a way that smectic A1 or Ad were induced in the system. It was found that the light colour sequence depends on the distance of compositions giving the selective reflection of the light in temperature-concentration scale from smectic phase.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129453263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Homologous series of fluorinated antiferroelectric liquid crystals: a comparative study of physical properties and the electro-optical performance 同源系列氟化反铁电液晶:物理性质与电光性能的比较研究
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581079
W. Piecek, P. Perkowski, Z. Raszewski, J. Kędzierski, J. Przedmojski, V. Bastys, A. L. Madrigal, R. Dabrowski, J. Zieliński
{"title":"Homologous series of fluorinated antiferroelectric liquid crystals: a comparative study of physical properties and the electro-optical performance","authors":"W. Piecek, P. Perkowski, Z. Raszewski, J. Kędzierski, J. Przedmojski, V. Bastys, A. L. Madrigal, R. Dabrowski, J. Zieliński","doi":"10.1117/12.581079","DOIUrl":"https://doi.org/10.1117/12.581079","url":null,"abstract":"Recently the investigation in the field of LCD technology has been boosted by the availability of new materials. The new group of fluorinated mesogens has been recently synthesized in Poland. In this work we have been focused on investigations of properties of materials having the broad temperature range of antiferroelectric phase. Such key factors as apparent tilt angle and structural properties and electro-optical performance have been studied by means of electro-optical and X-ray methods. The bend molecular shape and the presence of fluorinated tail has been assumed as a factor leading to an extremely high apparent optical tilt. The length of the fluorinated chain seems to affect th mesogenic behavior.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130279916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Liquid crystals with high photorefractive index and different cell construction solutions for optical light modulators 高光折射率液晶及不同的光调制器单元结构方案
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581204
J. Parka, T. Grudniewski, Y. Kurioz, R. Dabrowski
{"title":"Liquid crystals with high photorefractive index and different cell construction solutions for optical light modulators","authors":"J. Parka, T. Grudniewski, Y. Kurioz, R. Dabrowski","doi":"10.1117/12.581204","DOIUrl":"https://doi.org/10.1117/12.581204","url":null,"abstract":"Dynamic optical data storage and other applications in the field of optical data processing would be enabled by the development of suitable nonlinear optical materials. In this paper we present an experimental investigation of the orientation photorefractive effect in nematic liquid crystal mixtures with different optical anisotropy and various cell construction layers.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122049786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polarized FTIR spectra investigation of the metallo-organic copper (II) and nickel (II) compounds 金属有机铜(II)和镍(II)化合物的偏振FTIR光谱研究
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581114
L. Rastenienė, S. Pajeda, Antanas Kudarauskas, V. Bastys, A. Kulbickas, Mantas Miksys, Jonas Tiskevicius, R. Vaišnoras
{"title":"Polarized FTIR spectra investigation of the metallo-organic copper (II) and nickel (II) compounds","authors":"L. Rastenienė, S. Pajeda, Antanas Kudarauskas, V. Bastys, A. Kulbickas, Mantas Miksys, Jonas Tiskevicius, R. Vaišnoras","doi":"10.1117/12.581114","DOIUrl":"https://doi.org/10.1117/12.581114","url":null,"abstract":"Was synthesized two copper (II) complexes and one nickel complex of N-benzylidene-aniline derivatives and their ligands. We have performed polarized FTIR spectroscopy and X-ray diffraction measurements in wide temperature range (0-220°C) in order to establish correlation's among molecular, crystal and mesophase structures. We provided comparison of the FTIR and X-ray diffractometry results between well known metallo-organic copper (II) complexes, which crystallizes in the monoclinic space group C2/c, with similar nickel complex. Investigated ligands and their metallo-mesogens are displaying the same sequence of the liquid crystalline phases -- only with higher melting temperature for metallo-complexes.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"5565 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130472496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel ultra-low power liquid crystal display light shutter driving scheme 一种新颖的超低功耗液晶显示灯快门驱动方案
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581203
J. Pirs, D. Ponikvar, R. Petkovšek, B. Marin, M. Chambers
{"title":"A novel ultra-low power liquid crystal display light shutter driving scheme","authors":"J. Pirs, D. Ponikvar, R. Petkovšek, B. Marin, M. Chambers","doi":"10.1117/12.581203","DOIUrl":"https://doi.org/10.1117/12.581203","url":null,"abstract":"A novel liquid crystal display (LCD) driving concept for light shutters is shown here, based on driving signal polarity reversal controlled by the driving voltage integral across the LCD switching element electrodes, as opposed to plain periodic polarity reversal. This driving scheme optimizes the DC driving signal voltage balancing and guarantees compensation of the long-term (DC) component of the driving voltage within one polarity reversal cycle, irrespectively of driving voltage amplitude variations. The possibility of using low driving frequencies reduces the LCD switching elements power consumption significantly compared to standard driving techniques, which is important for portable devices such as welding light shutters.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132613557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum chemical DFT calculations of electronic and geometric structure of 4-(2-hexyloxy-ethoxy)-4`-cyano biphenyl (6O2OCB) 4-(2-己氧基-乙氧基)-4′-氰基联苯(6O2OCB)电子结构和几何结构的量子化学DFT计算
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581092
W. Witko, R. Tokarz-Sobieraj
{"title":"Quantum chemical DFT calculations of electronic and geometric structure of 4-(2-hexyloxy-ethoxy)-4`-cyano biphenyl (6O2OCB)","authors":"W. Witko, R. Tokarz-Sobieraj","doi":"10.1117/12.581092","DOIUrl":"https://doi.org/10.1117/12.581092","url":null,"abstract":"Density functional theory (DFT) calculations for 6020CB cyano biphenyl derivative were performed (using StoBe code). Total energy was calculated for different possible conformations of the rod-like molecule and the optimal conformation was found for the terminal chain lying in the plane of attached phenyl ring, whereas the rings of biphenyl were twisted ca. 35°. The calculation of molecular geometry with removal of restrictions for all atoms changed rod-like shape of molecule towards banana-like with the angle between axes of phenyl rings and chain ca. 150°. Electron densities for the lowest energy conformations were studied showing the decay of electron cloud at 2 Å. Finally the interactions of two molecules both rod-like and banana-like were also analyzed for different positions of rigid cores vs. terminal chains. Minimum energy criterion was used for each geometry of the system. It was found that rod-like conformations has reached the lowest energy for slightly shifted position of molecules whereas banana-like were packed close together. Many conformations with similar energies may give some hints towards interpretation of rich polymorphism of 6020CB which has been observed experimentally.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114408789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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