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1. 发明专利

JPH0667145A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH0667145A
公开(公告)日：1994-03-11
申请号：JP22382492
申请日：1992-08-24
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： TERAO HIROSHI , KONDO KATSUMI , NAKADA TADAO , OHARA SHUICHI , HIYAMA IKUO , KITAJIMA MASAAKI , SUZUKI KENKICHI , MADOKORO HITOMI
IPC分类号： G02F1/133 , G02F1/1335 , G02F1/13363 , G02F1/1362 , G02F1/139
摘要： PURPOSE:To obtain a low voltage driving liquid crystal display device which has multigradation and can be driven by a low voltage driving circuit. CONSTITUTION:To bring a range of twist angle 14 of a nematic liquid crystal layer between 95 deg. and 150 deg., to use phase difference plates 20, 21 with 0.005mum

2. 发明专利

JP2004046267A Liquid crystal display device 有权
公开(公告)号：JP2004046267A
公开(公告)日：2004-02-12
申请号：JP2003373870
申请日：2003-11-04
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KONDO KATSUMI , TERAO HIROSHI , ABE HIDETOSHI , OTA MASUYUKI , SUZUKI KENKICHI
IPC分类号： G02F1/1337 , G02F1/1335 , G02F1/1343 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To stably provide a bright liquid crystal display device having a high image quality. SOLUTION: The liquid crystal display device having a plurality of thin film transistors has a pair of substrates and a liquid crystal layer held between the pair of substrates, and at least one of the pair of substrates has an electrode structure formed to generate an electric field dominantly having components parallel with one of the pair of substrates, in the liquid crystal layer, a non-conductive layer formed so as to come into contact with the liquid crystal layer, and a color filter arranged on the non-conductive layer, and a surface coming into contact with the color filter, of the non-conductive layer makes the color filter flat, and a surface coming into contact with the liquid crystal layer controls orientation of liquid crystal of the liquid crystal layer. COPYRIGHT: (C)2004,JPO

3. 发明专利

JPH09230364A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH09230364A
公开(公告)日：1997-09-05
申请号：JP6415497
申请日：1997-03-18
申请人： HITACHI LTD
发明人： KONDO KATSUMI , TERAO HIROSHI , ABE HIDETOSHI , OTA MASUYUKI , SUZUKI KENKICHI
IPC分类号： G02B5/20 , G02F1/1335 , G02F1/1337 , G02F1/1343 , G02F1/136 , G02F1/1368
摘要： PROBLEM TO BE SOLVED: To stably provide a bright liquid crystal display device having high picture quality. SOLUTION: The liquid crystal display device having a plurality of thin film transistors consists of a pair of substrates, a liquid crystal layer held between the substrates, an electrode structure formed on at least one of the paired substrates to generate electric fields having a dominantly parallel component to the substrate in the liquid crystal layer, a nonconductive layer in contact with the liquid crystal layer, and a color filter 17 formed on the nonconductive layer. The interface of the nonconductive layer in contact with the color filter 17 has an effect to flatten the color filter 17 while the other interface in contact with the liquid crystal layer has an effect to control the alignment of the liquid crystal in the liquid crystal layer.

4. 发明专利

JPH06239839A 5-FLUORO-2-SUBSTITUTED PYRIMIDINE DERIVATIVE, ITS PRODUCTION AND LIQUID CRYSTAL COMPOSITION 失效
公开(公告)号：JPH06239839A
公开(公告)日：1994-08-30
申请号：JP2691593
申请日：1993-02-16
申请人： TAKEDA CHEMICAL INDUSTRIES LTD , HITACHI LTD
发明人： KAWADA MITSURU , UESUGI YOSHITAKA , YAMASHITA TOSHIRO , TERAO HIROSHI , KONDO KATSUMI , UCHIUMI YUUKA , OHARA SHUICHI
IPC分类号： C07D239/30 , C07D239/34 , C09K19/34 , G02F1/13
摘要： PURPOSE:To obtain a new compound useful as a liquid crystal component having a low viscosity, high physicochemical stability and a stable nematic phase. CONSTITUTION:This compound is expressed by formula I [R is 1-10C alkyl; Q is single bond, ether bond, carboxylic acid ester bond, etc.; rings A and B are benzene or cyclohexyl ring; X and Y are single bond, methylenoxy bond, oxymethylene bond, etc.; (m) and (n) are 0-2]. The compound is obtained by catalytically reducing a compound expressed by formula II in the presence of magnesium oxide, etc., in an inert solvent such as methanol. The compound expressed by formula I is one component useful for preparing liquid crystal compositions used in a liquid crystal flat panel display, etc., good in compatibility with many other liquid crystal compounds and capable of increasing the N-I point or improving other physical properties by adding thereof to the liquid crystal compositions containing the liquid crystal compounds.

5. 发明专利

JPH06167684A LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPH06167684A
公开(公告)日：1994-06-14
申请号：JP32164292
申请日：1992-12-01
申请人： HITACHI LTD
发明人： UCHIUMI YUUKA , TERAO HIROSHI , SAWAHATA TOMOKO , OHARA SHUICHI
IPC分类号： G02F1/13
摘要： PURPOSE:To decrease the fluctuations in display quality by a change in ambient temp., such as threshold value and contrast, by incorporating a liquid crystal compd. specified in the ratio of the components of the two minor axis direction of the polarization rate of molecules into a liquid crystal compsn. CONSTITUTION:This liquid crystal display element is constituted by interposing a twisted nematic liquid crystal layer 60 between a display electrode substrate 5 and a counter electrode substrate 6. The display electrode substrate 5 of the active matrix type display system is constituted by forming signal electrodes and scanning electrodes on an optically transparent insulating substrate 32 and forming switching transistors and display pixel electrodes 42 at the intersected points thereof, then forming an oriented film 51 subjected to a rubbing treatment in one direction thereon. At least 20wt.% liquid crystal compd. having 1.0 to 1.2 ratio of the components in the two minor axis directions of the polarization rate of the molecules is incorporated into the liquid crystal compsn. clamped between a pair of substrates 5 and 6. The ratio between the minor axes of the polarization rate is nearly determined by the structure of the skeleton section of the liquid crystal molecules.

6. 发明专利

JPH02105116A NONLINEAR OPTICAL ELEMENT 失效
公开(公告)号：JPH02105116A
公开(公告)日：1990-04-17
申请号：JP25718688
申请日：1988-10-14
申请人： HITACHI LTD
发明人： TERAO HIROSHI , ONO YOSHIYO , ITO YUZO , ISOGAI MASATO , TSUNODA ATSUSHI
IPC分类号： G02F1/35 , C07D215/60 , G02F1/355 , G02F1/361
摘要： PURPOSE:To obtain the optical element formed by using an org. nonlinear optical material which has a large nonlinear optical constant, is short in a cut off wavelength and is stable by consisting the nonlinear optical medium of a specific compd. CONSTITUTION:The compd. expressed by the formula I is used as the nonlinear optical medium 3. In the formula I, R2 to R8 denote hydrogen, electron donative group or electron attracting group and these groups may be the same or different. The high polymer contg. the compd. in the side chain or main chain refers to a monomer of a transparent high polymer; for example, the monomers bonded and polymerized with acrylic acid, methacrylic acid, styrene, etc., by ester bonding, amide bonding or carbon-carbon bonding. The nonlinear optical element which is short in the cut off wavelength, stable and excellent in nonlinear optical performance is obtd. in this way.

7. 发明专利

JPH01118823A ORGANIC NONLINEAR OPTICAL ELEMENT 失效
公开(公告)号：JPH01118823A
公开(公告)日：1989-05-11
申请号：JP27576887
申请日：1987-11-02
申请人： HITACHI LTD
发明人： ITO YUZO , TERAO HIROSHI , ONO YOSHIYO , ARAYA SUKEKAZU , ISOGAI MASATO , TSUNODA ATSUSHI
IPC分类号： C09B13/00 , C07C49/675 , C07C49/813 , C07C49/83 , C07C49/84 , C07C205/45 , C07C225/22 , C07C323/31 , C07D311/86 , G02F1/35 , G02F1/355 , G02F1/361
摘要： PURPOSE:To improve nonlinear optical performance and to improve thermal stability by forming a nonlinear optical medium of fluorenone and the deriv. thereof. CONSTITUTION:The nonlinear medium is formed of the fluorenone and the deriv. thereof which have a large nonlinear optical constant, are thermally stable, i.e., have a high m.p. and are not thermally broken up to a high temp. The important requirement for said medium to exhibit the large nonlinear optical constant is that a pi electron conjugation system exists in the skeleton thereof and that the medium has an electron-donating group and electron- withdrawing group as a substituent. Such a molecular structure which has large cohesive energy at the time of forming crystals and has a small entropy increase at the time of fusionis selected in order to have the thermal stability, e.g., high m.p. These act effectively on each other with the fluorenone and the deriv. thereof. The nonlinear optical performance and thermal stability are thereby improved.

8. 发明专利

JPH01102529A ORGANIC NONLINEAR OPTICAL ELEMENT 失效
公开(公告)号：JPH01102529A
公开(公告)日：1989-04-20
申请号：JP25971887
申请日：1987-10-16
申请人： HITACHI LTD
发明人： TERAO HIROSHI , ITO YUZO , ONO YOSHIYO , ARAYA SUKEKAZU , ISOGAI MASATO , TSUNODA ATSUSHI
IPC分类号： C08F246/00 , C07D309/32 , C08K5/1545 , G02F1/35 , G02F1/355 , G02F1/361
摘要： PURPOSE:To provide the title element which has a large nonlinear optical constant, is short in cut-off wavelength and is stable by forming a medium of pyrone and the deriv. thereof. CONSTITUTION:The medium is formed of the pyrone and the deriv. thereof. The pyrone has the structure expressed by formula I. The pyrone deriv. has preferably an electrodonating group or electron-attracting group or a substituent to break symmetry. The representative example thereof is 3-nitropyrone, etc. The nonlinear optical element which is short in the cut-off wavelength, is formed by using the material having nonlinear optical performance and operates efficiently is thereby obtd.

9. 发明专利

JPS6419282A THERMOSTATIC CELL 失效
公开(公告)号：JPS6419282A
公开(公告)日：1989-01-23
申请号：JP17463587
申请日：1987-07-15
申请人： HITACHI LTD
发明人： OKADA TEIGO , GUNJI YASUHIRO , TERAO HIROSHI
IPC分类号： F25D23/00 , F21V8/00 , G02B6/00
摘要： PURPOSE: To observe the state of an article or a sample in a thermostatic bath efficiently in safety while blocking heat transfer by conducting the inside and outside of the bath through an optical fiber and connecting the optical fiber with a display window provided on the outside of the tank body. CONSTITUTION: An optical fiber 4 embedded in tank body 1 has one end exposed into a tank and the other end connecting with a display window 5. Optical components, e.g. lenses, are fixed to the end of the fiber 4 in the tank or the joint with the window 5. An illumination light 10 illuminates a sample 8 and when the temperature regulator of the thermostatic tank is operating normally, state of the sample 8 in the tank can be displayed on the window 5 through the fiber 4 even it the door is closed. More specifically, inside of the tank can be observed constantly without opening the door.

10. 发明专利

JPS62113109A PRODUCTION OF PLASTIC OPTICAL TRANSMISSION BODY 失效
公开(公告)号：JPS62113109A
公开(公告)日：1987-05-25
申请号：JP25277685
申请日：1985-11-13
申请人： HITACHI LTD
发明人： TANNO SEIKICHI , EGUCHI KUNIYUKI , TAKEYA NORIAKI , OKABE YOSHIAKI , TERAO HIROSHI , ASANO HIDEKI , ABE TOMIYA
IPC分类号： G02B6/00 , C08F2/00 , C08F2/02 , G02B6/028
摘要： PURPOSE:To obtain a plastic optical transmission body having a continuous refractive index distribution and suitable for mass production independently of the diameter or length by extracting monomers with a solvent which dissolves the monomers but does not dissolve polymers, polymerizing the monomers and evaporating the extracting solvent. CONSTITUTION:Two or more kinds of monomers A giving transparent polymers having different refractive indexes are mixed with a solvent B having no polymerizable functional group in the molecule, and the monomers are polymerized to obtain a prepolymer consisting of the resulting polymers, the remaining unreacted monomers, and the solvent B. The prepolymer is immersed in a solvent C to extract the unreacted monomers and/or the solvent B. By the extraction, a continuous concn. distribution is provided to the unreacted monomers from the center of the prepolymer toward the periphery and then the unreacted monomers are completely polymerized. Since the solvent B is added, the monomer mixture is prevented from gelling excessively in a tube and clogging the tube during prepolymn., so a plastic optical transmission body can be continuously produced in the form of a fiber.

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