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1. 发明专利

JPH07270802A ORIENTED FILM FOR LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPH07270802A
公开(公告)日：1995-10-20
申请号：JP5859294
申请日：1994-03-29
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： INOUE KEIKO , YOKOKURA HISAO , OHARA SHUICHI
IPC分类号： G02F1/1337 , C08G73/10 , C08G73/16
摘要： PURPOSE:To lessen the dependency of a pretilt angle on production conditions and to lessen the dependency of the threshold voltage on frequencies at the high pretilt so as to prevent uneven display by composing an oriented film of a polyimide resin contg. specific constituting units. CONSTITUTION:This oriented film consists of the polyimide resin contg. the constituting units expressed by the formula. In the formula, R denotes 7 to 18C alkyl group; R denotes 1 to 18C alkyl group; R and R denote hydrogen or 1 to 18C alkyl groups; X denotes 1 to 4C alkyl group; a to d denote 0, 1 or 2; Z denotes an arom. hydrocarbon group. The polyimide resin is obtd. by polymerizing a diamine having basic skeleton of a bis-benzoyloxyphenylene type and tetracarboxylic dianhydride. The diamine of the bis- benzoyloxyphenylene is exemplified by 2,2-bis[4-(p-aminobenzoyloxy) phenylene]nonane, etc.

2. 发明专利

JPH05241162A 失效
公开(公告)号：JPH05241162A
公开(公告)日：1993-09-21
申请号：JP4272592
申请日：1992-02-28
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： YOKOKURA HISAO , INOUE KEIKO , OE MASATO , KONDO KATSUMI , OHARA SHUICHI , HASEGAWA SHINJI
IPC分类号： G02F1/1337
摘要： PURPOSE:To prevent production of domain and irregular luminance by incorporating a specified polymer material obtd. by polymn. of specified tetracarboxylic anhydride and specified diamine. CONSTITUTION:The compds. contains tetracarboxylic acid dianhydride expressed by formula I, tetracarboxylic acid dianhydride expressed by formula II, diamine expressed by H2N-(CH2)n-NH2 (n is an integer 4-12), and diamine expressed by formula III. In formula I, X is -O-, -COO-or -OCO-, R is an alkyl group of 5-18 carbon number, and R is an alkyl group of 1-18 carbon number. Namely, the compsn. contains tetracarboxylic acid dianhydride having long-chain alkyl groups, tetracarboxylic acid dianhydride having no long-chain alkyl group, diamine having long-chain alkyl groups, and diamine having no long-chain alkyl group, and an oriented film for a liquid crystal display element is obtd. from this compsn. Thereby, even when calcination temp. of the oriented film is changed, the obtd. film has an almost constant pretilt angle and the frequency dependence of the threshold voltage can be stabilized.

3. 发明专利

JPH06148650A LIQUID CRYSTAL ORIENTED FILM AND LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPH06148650A
公开(公告)日：1994-05-27
申请号：JP32623792
申请日：1992-11-12
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： YOKOKURA HISAO , OE MASATO , INOUE KEIKO , KONDO KATSUMI , OHARA SHUICHI , HASEGAWA SHINJI
IPC分类号： C08G73/10 , G02F1/1337
摘要： PURPOSE:To provide the org. oriented film which is constant in pretilt angle, exhibits a high pretilt angle in spite of changing of the baking temp. of the oriented film and is further improved in the dependency characteristic of the threshold voltage on frequencies and the liquid crystal display element including this org. oriented film. CONSTITUTION:This org. oriented film 4 for the liquid crystal display element contains the polyimide high-polymer material obtd. by polymerizing the diamine expressed by general formula (where (n) is an integer from 1 to 18; X is 1 to 4C alkyl group; (a), (b) denote 0, 1 or 2) and tetracarboxylic dianhydride. This oriented film 4 may be used by making combination use of other diamine. The oriented films 4 are formed between transparent electrodes 2 and a liquid crystal layer 5 of the liquid crystal display element constituted by clamping a nematic liquid crystal 5 exhibiting positive dielectric anisotropy between a pair of substrates 1 and 1 which have the electrodes 2 and at least one of which are transparent.

4. 发明专利

JPH05214101A THERMOPLASTIC POLYESTER-IMIDE AND ELECTRONIC PART AND DEVICE USING THE SAME 失效
公开(公告)号：JPH05214101A
公开(公告)日：1993-08-24
申请号：JP2096392
申请日：1992-02-06
申请人： HITACHI LTD , HITACHI CHEMICAL CO LTD
发明人： YOKOKURA HISAO , INOUE KEIKO , NAKADA TADAO , KONDO KATSUMI , OHARA SHUICHI , HASEGAWA SHINJI
IPC分类号： C08G73/16 , G02F1/1337 , G11B5/31 , H01L21/30 , H01L21/312 , H05K1/03
摘要： PURPOSE:To obtain the subject polyester-imide which is a polymer of a specific tetracarboxylic acid anhydride and a diamine, excellent in low temperature curability, etching properties and heat resistance and useful as electronic parts, etc. CONSTITUTION:The objective polyester-imide is a polymer of (A) a tetracarboxylic acid of formula I [Y is formula II (R1 is 7-18C alkyl; R3 is 1-18C alkyl), etc.; X is 1-4C alkyl; (a) to (d) are 0-2] such as 2,2-bis[4-(3,4- dicarboxybenzoyloxy)phenyl]nonane and (B) a diamine of formula III (Z is 0, CO, C02, etc.; X' is halogen or 1-4C alkyl) such as 2,2-bis[4-(p-aminophenoxy) phenyl]ether.

5. 发明专利

JPH11160716A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH11160716A
公开(公告)日：1999-06-18
申请号：JP32448097
申请日：1997-11-26
申请人： HITACHI LTD
发明人： SHIMURA MASATO , INOUE KEIKO , ISHII MASAHIRO , MATSUYAMA SHIGERU
IPC分类号： G02F1/1339 , G02F1/1337
摘要： PROBLEM TO BE SOLVED: To enable a high-contrast display which is stable in an alignment state on spacer peripheries, is highly reliable against a process fluctuation, vibration and impact and is lessened in display unevenness by subjecting spacers to a perpendicular alignment treatment or horizontal alignment treatment. SOLUTION: The spacers BZ of the liquid crystal display device are subjected to the perpendicular alignment treatment or horizontal alignment treatment. The initial alignment state of the liquid crystal molecules LK near the central part of the liquid crystal layer at the spacer (bead) BZ surface in a non- impression state of an electric field EDR attains the state radially arrayed from the center of the spacers BZ viewing in plane. The state of light leakage is nearly zero in the rubbing direction RDR and the direction perpendicular to the rubbing direction (a). At the time of the impression of the electric field EDR, the liquid crystal molecules LK are realigned with a twist of max. 45 deg. with respect to the rubbing direction RDR but the region where the alignment direction of the liquid crystal molecules LK changes by >=45 deg. decreases the further from the spacers BZ and the adverse influence of the light leakage is negligible (b).

6. 发明专利

JPH09171187A ACTIVE MATRIX TYPE LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH09171187A
公开(公告)日：1997-06-30
申请号：JP33052795
申请日：1995-12-19
申请人： HITACHI LTD
发明人： INOUE KEIKO , OE MASATO , MATSUYAMA SHIGERU , ASUMA HIROAKI , KONDO KATSUMI
IPC分类号： G02F1/1337 , G02F1/133 , G02F1/1335 , G02F1/1343
摘要： PROBLEM TO BE SOLVED: To make it possible to lower surface reflection by metallic electrodes and to make display with high image quality possible by providing a liquid crystal layer with means for suppressing the surface reflection of the electrodes applying approximately parallel electric fields. SOLUTION: The scanning electrodes, signal electrodes 15, pixel electrodes 3 and active elements constituting display pixel parts are formed on a first substrate 1. An alignment control layer for aligning the molecules of liquid crystals in a prescribed direction is formed directly or via an insulating layer 4 on the first substrate 1. The first substrate 1 is arranged to face a second substrate 1' formed with another alignment control layer for aligning the molecules of the liquid crystals in a prescribed direction. A liquid crystal layer 10 is held between the first and second substrates 1 and 1'. An antireflection layer 5 as means for suppressing the surface reflection of the electrodes applying the approximately parallel electric fields is formed on the liquid crystal layer 10. In such a case, the antireflection layer 5 is so arranged as to cover at least part of the electrodes applying the electric fields parallel with the liquid crystal layer 10.

7. 发明专利

JPH11218771A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH11218771A
公开(公告)日：1999-08-10
申请号：JP1960898
申请日：1998-01-30
申请人： HITACHI LTD
发明人： INOUE KEIKO , TANNO JUNJI , MATSUYAMA SHIGERU
IPC分类号： G02F1/1339 , G02F1/1335 , G02F1/1337 , G02F1/136 , G02F1/1365 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To obtain fine display quality capable of removing the reduction of contrast and the generation of defective display such as uneven display by suppressing defects in the liquid crystal orientation control function of an orientation film due to spacers. SOLUTION: In a liquid crystal display device provided with a pair of orientation films formed on respective opposed surfaces of a pair of opposed insulated substrates having a shading means 22 arranged like a grating surrounding one or plural pixels 10 at least on one substrate, spacers 30 and liquid crystal component held between both the orientation films to hold a counter gap between the substrates at a fixed width and pixel electrodes and reference electrodes for impressing an approximately horizontal or vertical electric field to the surfaces of insulating substrates, the center position 102 of each spacer 30 is arranged on a position displaced from the width direction center parts 103, 104 of the means 22.

8. 发明专利

JPH11119227A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH11119227A
公开(公告)日：1999-04-30
申请号：JP27857597
申请日：1997-10-13
申请人： HITACHI LTD
发明人： INOUE KEIKO , MATSUYAMA SHIGERU , KOBAYASHI SETSUO , ASUMA HIROAKI
IPC分类号： G02F1/1337 , G02F1/1339 , G02F1/1343
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of display irregularity caused by the move ment of a spacer member by fixing the member to the lower layer insulating film of the orientation layer in contact with the liquid crystal at the one side of transparent substrates. SOLUTION: A spacer member 30 is fixedly formed on a flat film 24 of a transparent substrate 1B side that differs from a transparent substrate 1A, on which pixel electrodes 18 and reference electrodes 14 are formed. Since the member 30, that exists between the substrates 1A and 1B, is fixed to the substrate 1B, the movement of the member 30 is prevented. The member 30 is fixed to the lower layer film 24 of an orientation layer 25 and is not directly fixed to the film 25. In this way, the member 30 is covered with the film 25, so that condition of the orientation of the liquid crystal around the member 30 is not greatly varied. Also when the member 30 is fixed to the film 25, the complicated work such as fixing surface treatment is eliminated.

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