摘要:
A layer of discotic liquid crystal having a molecular structure including a disk-shaped core and plural side chains connected to the core is disposed in contact with a substrate boundary provided with a homeotropic alignment power for aligning the side chains of the discotic liquid crystal molecules vertically to the boundary, whereby a uniform columnar structure vertical to the substrate of the discotic liquid crystal is formed. As a result, a discotic liquid crystal device having a stable homeotropic monodomain alignment can be formed from a wide scope of discotic liquid crystal materials.
摘要:
A novel class of discotic liquid crystals represented by the following formula was synthesized, and a layer thereof was incorporated in an organic electroluminescence device.
摘要:
A liquid crystal device is constituted by a chiral smectic liquid crystal and a pair of substrates sandwiching the chiral smectic liquid crystal therebetween and each having thereon an electrode for applying a voltage to the liquid crystal. At least one of the substrates being provided with an alignment control film comprising a specific aromatic polyimide which has been subjected to a uniaxial aligning treatment. The chiral smectic liquid crystal assumes bistability in a chiral smectic temperature range when incorporated in a test cell which is not provided with an alignment control film and has been subjected to shearing treatment. In the liquid crystal device including the polyimide alignment control film, the chiral smectic liquid crystal at least has a voltage-transmittance characteristic such that an effective tilt angle and a transmittance continuously change depending on an electric field applied thereto.
摘要:
A display apparatus is constituted by a display device including a plurality of pixels and control means for effecting a plurality of displaying operations at each pixel. Each of the displaying operation includes at least a first operation for displaying a first image at a first luminance and a second operation for displaying a second image substantially identical to the first image at a second luminance, said first and second luminances being non-zero and different from each other. One of the first and second luminances may preferably be smaller than ⅕ of the other luminance.
摘要:
A display apparatus is constituted by a display device including a plurality of pixels and control means for effecting a plurality of displaying operations at each pixel. Each of the displaying operation includes at least a first operation for displaying a first image at a first luminance and a second operation for displaying a second image substantially identical to the first image at a second luminance, said first and second luminances being non-zero and different from each other. One of the first and second luminances may preferably be smaller than ⅕ of the other luminance.
摘要:
A liquid crystal device has a pair of oppositely disposed substrates and a liquid crystal having chiral smectic C phase disposed therebetween. The liquid crystal is placed in an alignment state in chiral smectic C phase with smectic molecular layers forming a chevron structure. Under no electric field application, the liquid crystal has an average molecular axis substantially in alignment with the uniaxial alignment axis and/or a bisector of a maximum angle formed between two extreme molecular axes established under electric field application, while under electric field application, the liquid crystal provides an effective tilt angle and a transmittance that continuously changes depending on an electric field applied thereto.
摘要:
A liquid crystal device is constituted by a pair of substrates each provided with an electrode, and a chiral smectic liquid crystal composition disposed between the substrates. At least one of the substrates is provided with an alignment control film of a polyimide represented by the following formula (I): ##STR1## in which A denotes a planar tetravalent organic residue group; B denotes a divalent group represented by --CR.sub.1 (R.sub.2)-- where R.sub.1 and R.sub.2 independently denote H or alkyl group; a, b and c are independently 0 or 1; x and y are independently an integer of at least 0 and x+y=at least 1; and n is an integer of at least 2.
摘要翻译:液晶装置由分别设置有电极的一对基板和设置在基板之间的手性近晶液晶组合物构成。 至少一个基板设置有由下式(I)表示的聚酰亚胺的取向控制膜:其中A表示平面四价有机残基; B表示由-CR1(R2)表示的二价基团,其中R1和R2独立地表示H或烷基; a,b和c独立地为0或1; x和y独立地为至少为0且x + y =至少为1的整数; n为2以上的整数。
摘要:
A metal coordination compound having a structure according to formula (1) or (3), wherein ligand L is a phenylisoquinoline ligand and ligand L2 is different from L: A luminescence device and a display apparatus using this metal coordination compound are provided.
摘要:
A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and a dopant for improving the dispersability thereof. As the dopant, there are employed a light emitting compound and a non-light emitting compound or a current enhancing material. In case of employing the light emitting compound, the composition corresponds to a case of utilizing plural light emitting materials, and, in such case, the light emission wavelengths are preferably mutually closer. Also, evaporation of the light emitting material and the dopant in the same evaporation boat makes it possible to reduce evaporation temperature, thereby improving the dispersability of the light emitting material.
摘要:
An electroluminescence device having a layer containing a specific metal coordination compound is provided. The metal coordination compound is represented by formula (1) below: MLmL′n, (1) wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L′ are mutually different bidentate ligands; m is 1, 2 or 3 and n is 0, 1 or 2 with the proviso that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown below and a partial structure ML′n is represented by formula (3) or (4) shown below: The metal coordination compound of the formula (1) is characterized by having at least one aromatic substituent for at least one of CyN1, CyN2, CyC1 and CyC2. The metal coordination compound having the aromatic substituent is effective in providing high-efficiency luminescence, long-term high luminance, and less deterioration by current passing.
摘要翻译:提供具有含有特定金属配位化合物的层的电致发光器件。 金属配位化合物由下式(1)表示:<?in-line-formula description =“In-line Formulas”end =“lead”?> ML sub> L' 其中M是Ir,Pt,Rh或Pd的金属原子;(3)其中M是Ir,Pt,Rh或Pd的金属原子; L和L'是相互不同的二齿配体; m为1,2或3,n为0,1或2,条件是m + n为2或3; 部分结构MLm由下面所示的式(2)表示,并且部分结构ML'N N由如下所示的式(3)或(4)表示:式(1)的金属配位化合物 )的特征在于对于CyN1,CyN2,CyC1和CyC2中的至少一种具有至少一个芳族取代基。 具有芳香族取代基的金属配位化合物在提供高效率发光,长期高亮度和通过电流劣化方面是有效的。