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71. 发明专利

JPH04366431A OPTICAL RECORDING MEDIUM AND ITS MANUFACTURE 失效
公开(公告)号：JPH04366431A
公开(公告)日：1992-12-18
申请号：JP14305091
申请日：1991-06-14
申请人： HITACHI LTD
发明人： SASAKI HIROSHI , KOBAYASHI SETSUO , IWASAKI KISHIRO , OHARA SHUICHI
IPC分类号： B41M5/26 , G11B7/24 , G11B7/241
摘要： PURPOSE:To obtain an optical recording medium which does not cause any recording error even when the fragment, etc., of its recording layers falls on recording bits and has an excellent recording characteristic by providing an intermediate layer. CONSTITUTION:This optical recording medium is provided with recording layers provided on substrates 1 and an intermediate layer 3 made of a solid material having hardness of 95 deg. by a spring type hardness meter (JIS K6301-1982) at both surfaces of the layer 3 which are brought into contact with the recording layers 2.

72. 发明专利

JPH04251787A MANUFACTURE OF OPTICAL DISK MEMORY 失效
公开(公告)号：JPH04251787A
公开(公告)日：1992-09-08
申请号：JP828691
申请日：1991-01-28
申请人： HITACHI LTD
发明人： KOBAYASHI SETSUO , IWASAKI KISHIRO , SASAKI HIROSHI , OHARA SHUICHI , MINEMURA HIROYUKI
IPC分类号： B41M5/26 , G11B7/24 , G11B7/26
摘要： PURPOSE:To provide a method for manufacturing optical disk memory wherein the optical disk memory and a readout device therefor are made thin. CONSTITUTION:An optical disk memory 140 is manufactured in such a manner that an information recording layer is provided on a substrate having thickness of 1mm or less and the substrate is housed rotatably in a card having credit card size. That is, a series in which azaphthalo, phthalo, naphthalocyanin derivatives and heat quencher are mixed is used for the optical disk memory 140. A thin film is formed on the substrate by spin coating or dip coating. Thus, the optical disk memory having a thin substrate can be manufactured.

73. 发明专利

JPH03258889A OPTICALLY FUNCTIONAL MATERIAL 失效
公开(公告)号：JPH03258889A
公开(公告)日：1991-11-19
申请号：JP5365690
申请日：1990-03-07
申请人： HITACHI LTD
发明人： SASAKI HIROSHI , KOBAYASHI SETSUO , NAKAMURA MARIKO , IWASAKI KISHIRO , ITO YUTAKA , ISOGAI MASATO , KOBI AKIO
IPC分类号： G02F1/13 , C09K9/02 , C09K19/60 , G02F1/137 , G02F3/00
摘要： PURPOSE:To obtain an optically functional material useful as light recording medium, light shutter, light circuit, etc., by using a dianthracene derivative as a photosensitive material and liquid crystal as a dispersion medium, respectively wherein the derivative is rapidly isomerized and the isomer is extremely stable. CONSTITUTION:The objective optically functional material using (A) preferably a dianthracene derivative containing a straight-chain alkyl chain or polyethylene glycol chain at crosslinked part of two anthracene residues as a photosensitive material and (B) preferably liquid crystal having low TTomega (temperature at which solid becomes liquid crystal) and high TomegaT (temperature at which liquid crystal becomes liquid) (>=60 deg.C) to give the objective optically functional material.

74. 发明专利

JPH03173686A OPTICAL DATA RECORDING MATERIAL 失效
公开(公告)号：JPH03173686A
公开(公告)日：1991-07-26
申请号：JP31406589
申请日：1989-12-02
申请人： HITACHI LTD
发明人： KOBAYASHI SETSUO , IWASAKI KISHIRO , NAKAMURA MARIKO , SASAKI HIROSHI , ITO YUTAKA
IPC分类号： B41M5/26 , G11B7/24 , G11B7/244
摘要： PURPOSE:To lower the absorptivity of a data recording layer, to reduce the quantity of light converted to heat and to enhance the stability of reading light by containing a compound wherein the absorption max. value of a data recording layer is shifted toward a short wavelength region by a specific wavelength with respect to the wavelength of used laser beam. CONSTITUTION:The recording layer provided on the surface of a substrate contains a compound wherein an absorption max value is shifted toward a short wavelength region by 20-100nm with respect to the wavelength of used laser beam. This recording layer contains at least one of an azaphthalocyanine compound, a phthalocyanine compound or a naphthalocyanine compound represented by formula I [wherein M is Si, Ge or Sn, Z , Z , Z and Z are a pyridine ring, benzene ring or naphthalene ring skeletal which is not substituted or has one or move monovalent substituent X and may be same and different, Y and Y are -Ar, -OR, -OAr, -ISi(R)3, -OSI(OR)3, -OSi(OAr)3 or -OC(C6H )3 and may be same or different, Ar is a phenyl group or a substituted phenyl group, R is a 1-20C straight chain or branched alkyl group]. The azaphthalocyanine compound, the phthalocyanine compound or the naphthalocyanine compound is dissolved or dispersed in a solvent along with a binder and the obtained solution is applied to the surface of the substrate according to a usual coating method to be formed into a film.

75. 发明专利

JPH02204088A OPTICAL INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JPH02204088A
公开(公告)日：1990-08-14
申请号：JP2389489
申请日：1989-02-03
申请人： HITACHI LTD
发明人： KOBAYASHI SETSUO , IWASAKI KISHIRO , NAKAMURA MARIKO , SASAKI HIROSHI , ITO YUTAKA
IPC分类号： B41M5/26 , C07D487/22 , C09B47/04 , G11B7/24 , G11B7/244
摘要： PURPOSE:To provide an erasable optical information recording medium having excellent stability as a recording medium and excellent preservation stability of a recording state by incorporating specific naphthalocyanine compound in an information recording layer provided on a board. CONSTITUTION:Naphthalocyanine compound represented by a formula (I) is contained in an information recording layer of an optical information recording medium having the information recording layer on a board. In the formula (I), M is bivalent or trivalent metal, metal oxide, halogenide or hydroxide. Such naphthalocyanine compound has excellent thermal stability, and excellent preservation stability of a recording state. The optical information recording medium using it can be recorded, reproduced and erased by a reversible recording layer state change.

76. 发明专利

JPH01142616A FERROELECTRIC LIQUID CRYSTAL ELECTRO-OPTIC DEVICE 失效
公开(公告)号：JPH01142616A
公开(公告)日：1989-06-05
申请号：JP30024887
申请日：1987-11-30
申请人： HITACHI LTD
发明人： YOKOKURA HISAO , KONDO KATSUMI , KITAMURA TERUO , HANAWA YASUO , IWASAKI KISHIRO , NAKADA TADAO , KOBI AKIO
IPC分类号： G02F1/1337 , G02F1/133
摘要： PURPOSE:To obtain a device having excellent electro-optic characteristics without allowing a ferroelectric liquid crystal to lose the memory characteristic by using an oriented film laminated with >=2 layers of different polyimide films between either or both of liquid crystal layers as a light transparent electrode. CONSTITUTION:This optical device includes a substrate, an electric field impressing means provided on this substrate, an orientation control layer and a ferroelectric liquid crystal layer. The oriented film consisting of the constitution in which >=2 layers of the different polyimide films are laminated is used for the orientation control layer. Namely, the orientation control film laminated with >=2 layers is the orientation control film provided with the polyimide system of the 1st layer in contact with the liquid crystal to

77. 发明专利

JPS62200327A LIQUID CRYSTAL ELECTROOPTIC DEVICE 失效
公开(公告)号：JPS62200327A
公开(公告)日：1987-09-04
申请号：JP4178986
申请日：1986-02-28
申请人： HITACHI LTD
发明人： ERA SUSUMU , KITAMURA TERUO , YOKOKURA HISAO , ISOGAI MASATO , KONDO KATSUMI , IWASAKI KISHIRO , HANAWA YASUO , NAKADA TADAO , KOBI AKIO
IPC分类号： G02F1/1337 , G02F1/133
摘要： PURPOSE:To realize a new switching system by stabilizing preferentially one of the two molecular orientation states where the spiral of a liquid crystal is loosened. CONSTITUTION:With respect to an electrooptic device which uses a ferroelectric liquid crystal 1 and is switched by inversion of an electric field, only one of molecule oriented states (a) and (b) is stabilized preferentially and the state where the spiral is loosened is held to set the extinguishing state, and the other is set to the lighting state by application of the electric field. For the purpose of stabilizing preferentially one state, the method which increases the interface interaction between one substrate or oriented film layer and the liquid crystal or the like is used. Switching between th4e state where one state (a) or (c) is stabilized preferentially and a state (b) where the spiral is restored is possible also. Thus, a new switching system is possible to obtain the electrooptic device superior in responsiveness and contrast.

78. 发明专利

JPS62161124A LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPS62161124A
公开(公告)日：1987-07-17
申请号：JP209886
申请日：1986-01-10
申请人： HITACHI LTD
发明人： YOKOKURA HISAO , NAKADA TADAO , ERA SUSUMU , HANAWA YASUO , IWASAKI KISHIRO
IPC分类号： G02F1/133 , G02F1/1337
摘要： PURPOSE:To obtain a liquid crystal element suitable for mass production without generating scattering domain by using orientation control film comprising an org. high molecular material having a large tilt angle by means of the rubbing method. CONSTITUTION:The liquid crystal display element comprises a substrate, an electric field impressing means, an orientation control layer, and a nematic liquid crystal layer being usable for all purposes including display element, light modulation element, etc., wherein said orientation control layer is constituted of film of long-chain hydrocarbon polymer. The orientation control film comprising a specified poly phenyl silsesquioxane having >=3 deg. tilt angle is constituted of a polymer having >=2:1 proportion of C6H5 group to CH3 group in the side chain along the minor axis direction of the molecule. The polymer may be used in combination with a silane coupling agent, SiO2, Al2O3, TiO2, etc. The orientation film is formed similarly as the TN mode system by the general dipping method, rotation coating method, spray method, printing method, etc., then rubbing the coated material.

79. 发明专利

JPS62111237A FERROELECTRIC LIQUID CRYSTAL ELEMENT AND ITS PRODUCTION 失效
公开(公告)号：JPS62111237A
公开(公告)日：1987-05-22
申请号：JP2588586
申请日：1986-02-10
申请人： HITACHI LTD
发明人： KITAMURA TERUO , KONDO KATSUMI , HANAWA YASUO , ERA SUSUMU , IWASAKI KISHIRO , NAKADA TADAO , ISOGAI MASATO , YOKOKURA HISAO , KOBI AKIO , SHINDO YASUHIKO
IPC分类号： C09K19/20 , C09K19/22 , G02F1/13 , G02F1/133 , G02F1/1337
摘要： PURPOSE:To obtain an element provided with both of uniform orientation control and stable memory characteristic with the use of a ferroelectric liquid crystal smectic C* liquid crystal by providing an orientation control layer having a specific tilting angle for orientation with respect to the nematic liquid crystal to at least one between an electrode and liquid crystal layer. CONSTITUTION:The orientation control layer having

80. 发明专利

JPS6256938A FERROELECTRIC LIQUID CRYSTAL ELECTROOPTIC DEVICE 失效
公开(公告)号：JPS6256938A
公开(公告)日：1987-03-12
申请号：JP19590985
申请日：1985-09-06
申请人： HITACHI LTD
发明人： ERA SUSUMU , KONDO KATSUMI , IWASAKI KISHIRO , HANAWA YASUO , YOKOKURA HISAO , NAKADA TADAO , ISOGAI MASATO , KITAMURA TERUO , KOBI AKIO
IPC分类号： G02F1/1337 , F02B1/04 , G02F1/137 , G02F1/141
摘要： PURPOSE:To stably realize a bistable state by subjecting substrates to an orientation treatment in a parallel rubbing direction without via a smectic A phase in the phase transfer stage of a liquid crystal layer which exhibits a smectic C phase. CONSTITUTION:A liquid crystal material of which the phase changes in order of an isotropic phase, cholesteric phase and smectic C phase or the isotropic phase and smectic C phase from a high temp. side is used for the liquid crystal layer to be held between the substrates and the org. high-polymer films provided on the upper and lower substrates are subjected to the orientation treatment by parallel rubbing both faces. The bistable state is thereby realized with >=3mum thickness of the liquid crystal layer.

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