摘要:
This invention is directed to a polyimide film useful as use applications for electronic materials; a liquid crystal aligning film using the same; a liquid crystal display element provided with the liquid crystal aligning film; and a polyamic acid used as a raw material of the polyimide constituting the polyimide film. The polyimide used for preparing the above polyimide films, consists of a diamine component, the 50% by mol or more based upon the total diamine, of which is a diamine having a core structure having no polar group such as 1,2-bis(4-(4-aminobenzyl)phenyl)ethane, 1,6-bis(4-(4-aminobenzyl)phenyl)hexane, 1,1-bis(4-(4-aminobenzyl)phenyl)heptane, etc., and a tetracarboxylic acid dianhydride, and if necessary, an aminosilicon compound, is used as a liquid crystal aligning film.
摘要:
The present invention is to provide new diamino compounds useful for raw materials for production of liquid crystal aligning films that have excellent aligning properties and uniform and high pretilt angles over the whole display surface of wide substrates without afterimage phenomenons. The liquid crystal aligning films are constituted by a certain polyimide having as a principal constituent a structure unit represented by the formula; ##STR1##
摘要:
The present invention is to provide new diamino compounds useful for raw materials for production of liquid crystal aligning films that have excellent aligning properties and uniform and high pretilt angles over the whole display surface of wide substrates without afterimage phenomenons. The liquid crystal aligning films are constituted by a certain polyimide having as a principal constituent a structure unit represented by the formula; ##STR1##
摘要:
A varnish composition which comprises a solvent and a polymer component comprising a polyamic acid (B) (having residues which are derived from tetracarboxylic acids and a diamine respectively and which are residues having no side chains or residues having a pendant C1-2 alkyl group or are residues having a composition comprising a mixture of these), a polyamic acid (A) (having residues which are derived from tetracarboxylic acids and a diamine respectively and at least either of which is a residue having a pendant C3+ alkyl group or is a residue having a composition containing that residue), and a soluble polyimide, and in which the proportion of the polyamic acid (A) to the soluble polyimide is 1/99 to 99/1 by weight, the, sum of the polyamic acid (A) and the soluble polyimide accounts for 1 to 80 wt. % of the polymer component, the polyamic acid (B) accounts for 99 to 20 wt. % of the polymer component, and the proportion of the polymer component in the whole varnish composition is 0.1 to 40 wt. %. Also provided is a liquid-crystal display element having an alignment film formed from this varnish composition.
摘要:
A method for treating an aligning film for a liquid crystal display element wherein an aligning film consisting of an organic high molecular compound formed on a transparent substrate with a transarent electrode is subjected to a robbing treatment and thereafter said aligning film is irradiated with soft X-rays in a gas.A method for preparing a liquid crystal display element comprising the steps of arranging a transparent electrode on a pair of transparent substrates, forming an aligning film consisting of an organic high molecular compound on the said transparent electrode, treating said aligning film by a rubbing treatment, assembling the substrates to face each other with a spacer disposed therebetween, and then applying and sealing to a substrate a liquid crystal material wherein the aligning film is subjected to a robbing treatment and thereafter said aligning film is irradiated with soft X-rays in gas.
摘要:
An object of the present invention is to provide a varnish composition which can achieve totally and with good balance the improvement in various properties including electrical properties such as residual charge, a voltage holding ratio and image sticking, a pre-tilt angle, coating property, alignment property, and so on, which are desired for a liquid crystal aligning film formed. The varnish composition comprises polymer ingredients containing polyamic acid B represented by formula (1), polyamic acid A represented by formula (2) having a side chain of not less than 3 carbon atoms and N-substituted polyamide represented by formula (3), and a solvent for dissolving the polymer ingredients. The varnish composition contains 0.1 to 40% by weight of the polymer ingredients
摘要:
Disclosed is a method for producing liquid crystal display devices comprising a step for forming a transparent electrode and a circuit element of semiconductor on the surface of a pair of transparent substrates, and various steps for applying a photoresist, exposing to the light, etching, releasing the photoresist, inspecting the electrodes and circuit elements of semiconductor, forming an insulating film, forming an alignment film, rubbing the alignment film, spreading spacers, applying a sealing agent, fabricating a cell, filling a liquid crystal, pasting a polarizing plate, and connecting a driver IC characterized in that a soft X-ray is irradiated to the substrate in at least one step prior to the rubbing of the alignment films to produce liquid crystal display devices, at a high yield, in which devices number of pixel defect is small.
摘要:
A method for treating an aligning film for a liquid crystal display element and a method for preparing a liquid crystal display element are proposed. The said treating method comprises rubbing a specified aligning film formed on a transparent substrate with a transparent electrode and thereafter radiating soft X-ray for 2 seconds or more in gas. The said preparing method comprises arranging a transparent electrode on a pair of transparent substrates, forming an aligning film consisting of an organic high molecular compound on the said transparent electrode, treating the said aligning film by a rubbing treatment, assembling the substrates face to face each other via a spacer, and then sealing a liquid crystal material. By a method for treating an aligning film according to the invention, it is possible to lower display unevenness of a liquid crystal display element and to improve an yield of product.
摘要:
Disclosed is a method for producing liquid crystal display devices comprising a step for forming a transparent electrode and a circuit element of semiconductor on the surface of a pair of transparent substrates, and various steps for applying a photoresist, exposing to the light, etching, releasing the photoresist, inspecting the electrodes and circuit elements of semiconductor, forming an insulating film, forming an alignment film, rubbing the alignment film, spreading spacers, applying a sealing agent, fabricating a cell, filling a liquid crystal, pasting a polarizing plate, and connecting a driver IC characterized in that a soft X-ray is irradiated to the substrate in at least one step prior to the rubbing of the alignment films to produce liquid crystal display devices, at a high yield, in which devices number of pixel defect is small.
摘要:
A liquid crystal alignment film and a liquid crystal display element are provided, according to which a phenomenon of afterimage is slight in the case of liquid crystal display elements of TN mode or STN mode, while a problem of printing phenomenon is solved and a good memory characteristic is obtained in the case of ferroelectric liquid crystal display elements,the liquid crystal alignment film and the liquid crystal display element being characterized in that at least one kind of compounds expressed by the following formula (2) or (3) is added into a liquid crystal alignment film consisting of a polyimide expressed by the following formula (1): ##STR1##