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1. 发明专利

JPH1195227A ORIENTED FILM IN COMMON USE AS PROTECTIVE FILM FOR LIQUID CRYSTAL, LIQUID CRYSTAL HOLDING SUBSTRATE USING THE SAME AND LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH1195227A
公开(公告)日：1999-04-09
申请号：JP25996197
申请日：1997-09-25
申请人： HITACHI CHEMICAL CO LTD , HITACHI LTD
发明人： KANETANI YUICHI , OKUDA NAOKI , KATSUYA YASUO , NAKAGAWA TAKAO , UEDA TOYOICHI , UMEDA HIROYUKI , KONDO KATSUMI , ARAYA SUKEKAZU , YOKOKURA HISAO
IPC分类号： G02F1/1337 , C08G73/10 , C08L79/08
摘要： PROBLEM TO BE SOLVED: To embody the adhesion property to glass substrates and color filters, etc., and excellent orientability and planarization characteristic by forming a liquid film consisting of a resin compsn. contg. specific polyamide acid on an electrode surface and drying the film by heating, thereby forming a polyamide film. SOLUTION: The liquid film consisting of the resin compsn. contg. the polyamide acid of 1000 to 20000 in weight average mol.wt. is formed by a printing method on the surface of the liquid crystal holding substrate formed with the electrode and is dried by heating, by which the polyamide film is formed. The resin compsn. contg. the polyamide acid contains a solvent in such a manner that a solid content concn. of 7 to 60 wt.% is attained. The viscosity of the soln. thereof is preferably 30 to 1000 mpa.s. The polyamide acid is preferably obtd. by bringing a diamine component contg. at least one kind of the compds. selected from a group consisting of a rigid diamine compd. having a benzene ring, rigid dihydrazine compd. having a benzene ring and diamine compd. having a sulfone group and/or sulfide group and a tetracarboxylic dianhydride component into reaction.

2. 发明专利

JPH1010539A RESIN COMPOSITION FOR COATING, LIQUID CRYSTAL ORIENTED FILM IN COMMON USE AS PROTECTIVE FILM FOR LCD FORMED BY USING THE SAME AND PRODUCTION OF LIQUID CRYSTAL ORIENTED FILM IN COMMON USE AS PROTECTIVE FILM FOR LCD 失效
公开(公告)号：JPH1010539A
公开(公告)日：1998-01-16
申请号：JP16793996
申请日：1996-06-27
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： KANETANI YUICHI , OKUDA NAOKI , KATSUYA YASUO , YOKOKURA HISAO , KONDO KATSUMI , ARAYA SUKEKAZU , UMEDA HIROYUKI
IPC分类号： G02F1/1337 , C09D179/04 , C09D179/08
摘要： PROBLEM TO BE SOLVED: To obtain a resin compsn. for coating having a good adhesion property to glass substrates and color filters, coatability, transparency and orientability in addition to heat resistance and chemical resistance by using a specific polyimide resin. SOLUTION: The polyimide resin contg. diamine having sulfone and/or sulfide on the main chain at >=30mol% of the total molar number of the diamine and contg. aliphat. and/or alicyclic tetracarboxylic acid dianhydride at >=30mol% of the total molar number of the acid dianhydride is used. As a result, the resin compsn. has the good light transparency and orientability. Further, a high-concn. and low-viscosity soln. is prepd. by a heat treatment and half esterification of the tetracarboxylic acid dianhydride, by which the use of the compsn. as a resin for coating and a liquid crystal oriented film in common use as a protective film for LCD(liquid crystal display) having an excellent flattening function is made possible. Consequently, the differences in level of color filters, TFTs, common electrodes, etc., are eliminated and, therefore, flat substrates are obtd. The orientation defect which is heretofore resulted from the ruggedness of the substrates is eliminated and the domain and contrast ratio are improved.

3. 发明专利

JPH11241041A RESIN COMPOSITION FOR PRINTING, PRINTED RESIN FILM, PRODUCTION OF PRINTED RESIN FILM, LIQUID CRYSTAL ALIGNMENT FILM, SUBSTRATE WITH SANDWICHED LIQUID CRYSTAL, AND LIQUID CRYSTAL DISPLAY 失效
公开(公告)号：JPH11241041A
公开(公告)日：1999-09-07
申请号：JP4537798
申请日：1998-02-26
申请人： HITACHI CHEMICAL CO LTD , HITACHI LTD
发明人： KANETANI YUICHI , OKUDA NAOKI , KATSUYA YASUO , UMEDA HIROYUKI , KONDO KATSUMI , ARAYA SUKEKAZU , TOMIOKA YASUSHI
IPC分类号： G02F1/1337 , C08G73/10 , C09D11/033 , C09D11/10 , C09D11/102 , C09D179/08 , C09K19/38
摘要： PROBLEM TO BE SOLVED: To obtain a composition which can form a printed resin film easily patterned without a step of photolithography by using each of a low-molecular-weight portion having a specified molecular weight distribution peak and a high-molecular-weight portion having a specified molecular weight peak as the resin component of a polyimide or of a precursor thereof. SOLUTION: The peaks of the low-molecular-weight and of the high-molecular-weight portion are 1,000 to below 10,000 and 10,000 to 1,000,000, respectively. The polyimide or the precursor thereof is desirably one prepared by reacting an aliphatic or alicyclic tetracarboxylic acid dianhydride with a diamine compound. The composition desirably has a solid matter concentration of 7-60 wt.% and a viscosity of 30-1,000 mPa.s. The transmittance to light at a wavelength of 400-800 nm is desirably 90% or above when measured on a film having a thickness of 0.1-3 μm. The composition can easily form a resin film having a uniform thickness of 0.1-3 μm, and the formed film is useful as an insulation film for semiconductors, a protective film for liquid crystal color filters and, after surface rubbing, is useful as a liquid crystal alignment film or a liquid crystal protecting/alignment film.

4. 发明专利

JPH1192659A RESIN COMPOSITION FOR PRINTING AND PRODUCTION OF PATTERNED PRINTING RESIN FILM 失效
公开(公告)号：JPH1192659A
公开(公告)日：1999-04-06
申请号：JP25996097
申请日：1997-09-25
申请人： HITACHI CHEMICAL CO LTD , HITACHI LTD
发明人： KANETANI YUICHI , OKUDA NAOKI , KATSUYA YASUO , NAKAGAWA TAKAO , UEDA TOYOICHI , UMEDA HIROYUKI , KONDO KATSUMI , ARAYA SUKEKAZU , YOKOKURA HISAO
IPC分类号： G02F1/1337 , C08G73/10 , C08L79/08
摘要： PROBLEM TO BE SOLVED: To obtain the subject composition having excellent properties such as heat-resistance and capable of easily forming a patterned printing resin film without using a photolithographic step by including a polyamic acid having a molecular weight falling within a specific range. SOLUTION: This composition contains a polyamic acid having a weight- average molecular weight of 1,000-20,000 and preferably has a solid concentration of 7-60 wt.% and a viscosity of 30-1,000 mPa.s. The polyamic acid is preferably produced by reacting (A) a diamine component containing at least one kind of compound selected from a rigid diamine compound having benzene ring, a rigid dihydrazide compound having benzene ring and a diamine compound having sulfone group and/or sulfide group with (B) a tetracarboxylic acid dianhydride component [concretely containing >=20 mol.% (based on the total molar number of acid dianhydride component) of a tetracarboxylic acid dianhydride of the formula ((n) is 2=20)].

5. 发明专利

JPH1010535A FLATTENING AND ORIENTATION CONTROL FILM FOR LIQUID CRYSTAL 失效
公开(公告)号：JPH1010535A
公开(公告)日：1998-01-16
申请号：JP15867996
申请日：1996-06-19
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： YOKOKURA HISAO , KONDO KATSUMI , ARAYA SUKEKAZU , UMEDA HIROYUKI , MATSUYAMA SHIGERU , KANETANI YUICHI , OKUDA NAOKI , KATSUYA YASUO
IPC分类号： G02F1/1333 , G02F1/1337
摘要： PROBLEM TO BE SOLVED: To make it possible to obtain a liquid crystal element which is lessened in unequal display and has high image quality by using specific imide ring-contg. org. molecules for the flattening and oriented films of orientation control layers holding a liquid crystal compsn., thereby increasing the allowance in a production process. SOLUTION: Wire-shaped electrodes 4, 1 are formed on the inner side of a pair of substrates 7, 7 and the liquid crystal compsn. is held between the substrates on both sides or one side of the flattening and orientation control films 5 of the substrate surfaces. The bar-shaped liquid crystal molecules 6 are subjected to orientation control toward a direction 10 by some angle in the longitudinal direction of the electrodes 4, 1 on the boundaries of both substrates by integration with the control films 5 and attain the state that the high polymers uniformly face the direction within the liquid crystal layer at the time of non-impression of an electric field. The film thickness of the single layer of the control films 5 is >=0.5μm. The imide ring-contg. org. high polymers having a weight average mol.wt. of =90% in a range of a wavelenght 400 to 800nm, a resin component concn. of >=15wt.% and varnish viscosity of

6. 发明专利

JP2000302866A LIQUID CRYSTAL ORIENTED FILM COMPOSITION, LIQUID CRYSTAL- HOLDING BASE PLATE AND LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2000302866A
公开(公告)日：2000-10-31
申请号：JP8269699
申请日：1999-03-26
申请人： HITACHI CHEMICAL CO LTD
发明人： KANETANI YUICHI , OKUDA NAOKI , KATSUYA YASUO , UMEDA HIROYUKI
IPC分类号： G02F1/1337 , C08G73/10
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal oriented film composition which shortens the time required for preparing a liquid crystal display device and shows good display properties and a high contrast ratio in a transverse electric field liquid crystal display device, a liquid crystal-holding base plate and a liquid crystal display device. SOLUTION: This liquid crystal oriented film composition comprises a polyimide precursor obtained by allowing a diamine component to react with an acid dianhydride component wherein an aliphatic tetracarboxylic acid dianhydride and/or alicyclic tetracarboxylic acid dianhydride accounts for from 30 to 99 mol % of the total molar of the acid dianhydride component. A liquid crystal- holding base plate is prepared by applying the obtained polyimide precursor to a plate, drying it and subjecting it to a dehydration ring closure to form a polyimide film. A liquid crystal display device has a series of electrodes which consist of the liquid crystal-holding base plate and apply an electric field roughly parallel to the substrate surface to a liquid crystal layer, and a liquid crystal oriented film formed from the liquid crystal oriented film composition.

7. 发明专利

JP2000298279A RESIN COMPOSITION, RESIN COMPOSITION FOR LIQUID CRYSTAL ALIGNMENT LAYER, THE LIQUID CRYSTAL ALIGNMENT LAYER, SUBSTRATE-HOLDING LIQUID CRYSTAL AND LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2000298279A
公开(公告)日：2000-10-24
申请号：JP8269599
申请日：1999-03-26
申请人： HITACHI CHEMICAL CO LTD
发明人： KANETANI YUICHI , OKUDA NAOKI , KATSUYA YASUO , UMEDA HIROYUKI
IPC分类号： G02F1/1337 , C08G73/10
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal alignment layer with superior characteristics, even if it is hardened at a temperature as low as 200 deg.C or lower. a resin composition useful for it and substrates to hold a liquid crystal in between suppressing alignment defect while film thickening of the liquid crystal alignment layer causes to alleviate projecting and recessing due to TFT elements, comb-shaped electrodes or the like, and a liquid crystal display device. SOLUTION: The resin composition for a liquid crystal alignment layer comprises a resin composition containing a polyamide acid, obtained by reacting a tetracarboxylic acid dianhydride containing 10-70 mol% tetracarboxylic acid dianhydride expressed by general formula (I) (where in the formula, (n) expresses an integer of 2-20) with a diamine compound. The liquid crystal alignment layers are produced by rubbing polyimide layers, formed on surfaces of substrates, on which electrodes are formed. The substrates to hold a liquid crystal in between are formed by forming the liquid crystal alignment layers, and the liquid crystal display device is provided with the substrates to hold the liquid crystal in between.

8. 发明专利

JP2001281671A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2001281671A
公开(公告)日：2001-10-10
申请号：JP2000097820
申请日：2000-03-30
申请人： HITACHI LTD
发明人： TOMIOKA YASUSHI , OKISHIRO KENJI , UMEDA HIROYUKI , OAKU HITOTSUGU , KONDO KATSUMI
IPC分类号： C08G73/10 , G02F1/1333 , G02F1/1337 , G02F1/1343 , G02F1/136 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal display device, having reduced display unevenness due to image sticking and a residual image phenomenon and with high image quality, with respect to a liquid crystal display device using an IPS(in-plane switching) mode, in which a liquid crystal is rotationally operated mostly inside a plane, and displaying is carried out using birefringence of the liquid crystal. SOLUTION: In the liquid crystal display device comprising a pair of substrates of which at least one is transparent, a liquid crystal layer held between the substrates, a pixel electrode, a common electrode and an active element on one of the substrates and alignment control layers and polarizing plates formed on the respective substrates, the image sticking and generation of the residual image are prevented by forming the pair of the alignment control layers with an organic polymer of polyamic acid type or polaymic acid ester type with 60% or higher relative imide ratio or by disposing at least one or more insulation layers between the alignment control layer on the side of the substrate, on which a group of the electrodes is formed and the pixel and common electrodes thereunder so as to flatten the end parts of the electrodes and to moderate the electric field concentrating.

9. 发明专利

JP2000066210A ACTIVE MATRIX TYPE LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2000066210A
公开(公告)日：2000-03-03
申请号：JP23809598
申请日：1998-08-25
申请人： HITACHI LTD
发明人： UMEDA HIROYUKI , TOMIOKA YASUSHI , ARATANI YOSHIKAZU
IPC分类号： G02F1/1337
摘要： PROBLEM TO BE SOLVED: To provide an active matrix type liquid crystal display device having a wide angle of visual field without producing afterimages by controlling the density of polar functional groups in the alignment controlling layer formed between one substrate and a liquid crystal compsn. layer to be smaller than the density of polar functional groups in the alignment controlling layer formed between the other substrate and liquid crystal compsn. layer. SOLUTION: A first alignment layer 8 and second alignment layer 10 are made of different materials from each other so that the second alignment layer 10 easily adsorbs ionic impurities than the first alignment layer 8. Namely, the density of carboxyl groups and amide bonds in the second alignment layer 10 is controlled to be larger than in the first alignment layer 8. Therefore, lots of ionic impurities are adsorbed to the second alignment layer 10, which decreases the amt. of ionic impurities adsorbed to the first alignment layer 8. Thereby, since deviation of changes produced by DC voltage caused by burst voltage is decreased on the first alignment layer 8 having a larger effect to change the potential of the liquid crystal layer, production afterimages is decreased.

10. 发明专利

JPH09105925A LIQUID CRYSTAL DISPLAY DEVICE AND ITS PRODUCTION 失效
公开(公告)号：JPH09105925A
公开(公告)日：1997-04-22
申请号：JP26385995
申请日：1995-10-12
申请人： HITACHI LTD
发明人： ARAYA SUKEKAZU , UMEDA HIROYUKI , KAGAWA HIROYUKI , YOKOKURA HISAO , KONDO KATSUMI , MATSUYAMA SHIGERU , OE MASATO
IPC分类号： G02B5/20 , G02F1/1333 , G02F1/1335 , G02F1/1343
摘要： PROBLEM TO BE SOLVED: To obtain a liquid crystal display device having a wide visual field angle, a high contrast and less unequal display by providing one substrate of a pair of substrates with plural electrodes, protective films formed on these plural electrodes and insulating films formed in the recessed parts on these protective films in order to make the thickness of a liquid crystal uniform. SOLUTION: This liquid crystal display device is provided with a pair of the substrates and the liquid crystal layer 8 held between a pair of the substrates. At least one substrates of a pair of the substrates are provided with the plural electrodes 3, the protective films 4 formed on the plural electrodes 3 and the insulating films formed in the recessed parts on the protective films 4 in order to make the thickness of the liquid crystal uniform. The change in the thickness of the liquid crystal layer is preferably confined to

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