公开(公告)号：JPH06289395A

公开(公告)日：1994-10-18

申请号：JP7264393

申请日：1993-03-31

Applicant: CASIO COMPUTER CO LTD

Inventor： NAKAJIMA YASUSHI

IPC: B01J19/00 ,  B05D1/20 ,  G02F1/1337

Abstract: PURPOSE:To provide the liquid crystal display device which is free from a defect in initial orientation of a liquid crystal and a defect in reverse tilt discrimination orientation at the time of impression of a driving voltage and has good display quality by orienting liquid crystal molecules by providing these molecules with a desired pretilt angle as the liquid crystal display element formed with horizontally oriented films consisting of polyimide by an LB method. CONSTITUTION:The horizontally oriented films 8, 9 consisting of polyimide films formed by laminating monomolecular films of amphiphatic compds. having hydrophobic groups and hydrophilic groups by the LB method and subjecting the laminated films to an imidization treatment are so formed by controlling the number of lamination of the monomolecular films that the long chain alkyl groups per unit area remain at a prescribed ratio. The liquid crystal molecules A are oriented at the pretilt angle phi meeting the remaining ratio of the long chain alkyl groups per unit areas of the horizontally oriented films 8, 9.

公开(公告)号：JPH06281939A

公开(公告)日：1994-10-07

申请号：JP6948193

申请日：1993-03-29

Applicant: CASIO COMPUTER CO LTD

Inventor： NAKAJIMA YASUSHI

IPC: G02F1/1337

Abstract: PURPOSE:To provide a liquid crystal display element capable of obtaining good display quality free from the initial orientation defect of a liquid crystal and reverse tilt discrimination, etc., at the time of applying a driving voltage by forming horizontally oriented films as rough surfaces films having microruggedness and horizontally orienting liquid crystal molecules with the pretilt angle corresponding to the surface roughness of the oriented films. CONSTITUTION:The horizontally oriented films 8, 9 formed by the LB method (Langmuir-Blodgett technique) on both substrates 1, 2 are formed as the rough surfaces films having the microruggedness and the liquid crystal molecules A are horizontally oriented at the pretilt angle phi corresponding to the surface roughness of the oriented films 8, 9. The horizontally oriented films 8, 9 are formed as the rough surface films by roughening the film surfaces of insulating films 6, 7 formed to cover transparent electrodes 4, 5 on the ground surfaces, i.e., both substrates 1, 2 on which the oriented films are formed. Then, the liquid crystal molecuels are oriented with the desired pretilt angle if the surface roughness of the oriented films 8, 9 is controlled. The display quality free from the initial orientation defect of the liquid crystal and the reverse tilt discrimination, etc., at the time of applying the driving voltage is obtd.

公开(公告)号：JPH06194662A

公开(公告)日：1994-07-15

申请号：JP34426392

申请日：1992-12-24

Applicant: CASIO COMPUTER CO LTD

Inventor： NAKAJIMA YASUSHI

IPC: G02F1/1337

Abstract: PURPOSE:To suppress the generation of static electricity and damaging the surface of the oriented film by rubbing the surface of the oriented film formed on the substrate of a liq. crystal element with a rubbing cloth made of a fibrous protein. CONSTITUTION:Many transparent picture-element electrodes 3 and active elements 4 corresponding to the electrodes 3 are arranged in the shape of a matrix on the surface of a lower substrate 1 opposed to a liq. crystal layer. The upper substrate and the electrode forming surface of the lower substrate 1 are covered with an insulating film 6 made of silicon oxide, etc., and the oriented film 8 is formed on the insulating film 6 to horizontally orient the liq. crystal molecules. The oriented film 8 is made of a polyimide, for example, and the film surface is oriented by rubbing. The orientation is carried out by a rubbing roller 20 obtained by sticking a rubber cloth 22 of a fibrous protein on a roller main body 21.

公开(公告)号：JPH0695123A

公开(公告)日：1994-04-08

申请号：JP24381492

申请日：1992-09-11

Applicant: CASIO COMPUTER CO LTD

Inventor： NAKAJIMA YASUSHI

IPC: B01J19/00 ,  B05D1/20 ,  G02F1/13 ,  G02F1/1337

Abstract: PURPOSE:To provide the process for production of the electrode substrate which can easily form monomolecular films approximately uniformly arrayed with molecules along the direction orthogonal with the side edges of the substrate by an LB (Langmuir-Blodgett) technique. CONSTITUTION:Transparent electrodes 5 are extended and formed within the square substrate region AL set on the rectangular substrate 1' in the direction intersecting at a prescribed angle theta with the side edges 1'a, 1'a of the substrate material 1'. This substrate material 1' is immersed into the pure water 11 in a water tank 10 while the substrate material is supported in the posture to hold the side edges 1'a, 1'a perpendicular. The monomolecular layer A of an oriented film material is developed on the water surface of the water tank 10 and while the surface pressure of this monomolecular layer A is maintained under a specified pressure, the substrate material 1' is pulled up at a specified speed and the monomolecular layer A is deposited on the transparent electrode 5 of the substrate material 1'. As a result, the monomolecular, the orientation direction of the molecules (m) of which intersects diagonally at the angle thetawith the extension direction (d) of the electrodes is formed.

公开(公告)号：JPH052169A

公开(公告)日：1993-01-08

申请号：JP18025391

申请日：1991-06-24

Applicant: CASIO COMPUTER CO LTD ,  KANEGAFUCHI CHEMICAL IND

Inventor： NAKAJIMA YASUSHI ,  MURATA MAKOTO ,  KAMIKITA MASAKAZU

IPC: C08G73/10 ,  G02F1/1337

Abstract: PURPOSE:To provide the liquid crystal oriented film which can control the pretilt angle of a liquid crystal and is uniform and defectfree without using a diagonal vapor deposition method and rubbing method. CONSTITUTION:This process includes a stage for obtaining thin films by laminating the monomolecular films obtd. by developing an amphiphilic high-polymer material having the repeating unit expressed by formula I, for example the material expersed by formula III, on a water surface onto a substrate formed with electrodes and a stage for partially converting the thin films to the polyimide expressed by formula II in such a manner that the univalent groups of 12 to 30C in the thin films remain at 1.5 to 0.8 pieces ratio per the repeating unit of the high-polymer material expressed by the formula I.

公开(公告)号：JPH04353826A

公开(公告)日：1992-12-08

申请号：JP12974891

申请日：1991-05-31

Applicant: CASIO COMPUTER CO LTD

Inventor： NAKAJIMA YASUSHI

IPC: G02F1/1337

Abstract: PURPOSE:To uniformly vertically orient liquid crystal molecules and to obtain uniform optical characteristics by using films formed by depositing >=1 layers of monomolecular films of a compd. prepd. by bringing polyamic acid and long-chain alkyl amine into reaction as the vertical oriented films. CONSTITUTION:The soln. of the polyamic acid deriv. compd. is first formed by mixing a soln. prepd. by dissolving the polyamic acid into a solvent and a soln. prepd. by dissolving the long-chain alkyl amine at 1:1 ratio and bringing the polyamic acid and the long-chain alkyl amine into an ion bond reaction. The vertical oriented films 8, 9 are formed by superposing and depositing several layers and some tens layers of the monomolecular films of the polyamic acid deriv. compd. by a Langmuir-Blodgett technique onto substrates 1 formed with transparent electrodes 4 and formed with insulating films 6 thereon and drying the deposited films. Since the orientability of the vertical oriented films 8, 9 formed in such a manner is uniform over the entire part of the oriented films, the liquid crystal molecules are uniformly vertically oriented and the uniform optical characteristics are obtd.

公开(公告)号：JPH04100568A

公开(公告)日：1992-04-02

申请号：JP21493190

申请日：1990-08-16

Applicant: CASIO COMPUTER CO LTD

Inventor： KITAGAWA KATSUMI ,  NAKAJIMA YASUSHI

IPC: B05D1/20 ,  B01J19/00 ,  B05D1/28

Abstract: PURPOSE:To use a shallow water tank and reduce a space above the water tank by transferring a monomolecular film on the surface of water onto the surface of a base plate via a rotating drum. CONSTITUTION:Liq. substances are dropped on the water surface between a transfer barrier 13 in a water tank 11 and a rotating drum 14 therein to allow their monomolecules to flow on the water surface so as to be spread in the form of a film. A monomolecular film A on the water surface is thereafter forced toward a rotating drum 14 by a transfer barrier 13 and the rotating drum 14 is rotated synchronously therewith, whereby the monomolecular film A on the water surface is caused to adhere to the outer peripheral surface of the rotating drum 14 and then picked up thereby, and a base plate 10 is then carried and fed on the rotating drum 14 synchronously with the rotation thereof, whereby the monomolecular film A adhering to the outer periphery of the rotating drum 14 is transferred onto the underside of the base plate 10. In this way a shallow water tank can be used and a small space above the water tank 11 suffices for this purpose.

公开(公告)号：JPH0497225A

公开(公告)日：1992-03-30

申请号：JP21184490

申请日：1990-08-10

Applicant: CASIO COMPUTER CO LTD

Inventor： NAKAJIMA YASUSHI

IPC: G02F1/1333 ,  G02F1/1337 ,  G09F9/35

Abstract: PURPOSE:To allow the simplification of a structure, improvement in productivity and the variation of phase differences by forming a composite material of a film in which high-polymer materials and liquid crystal materials to orient molecules in a prescribed direction by the stress applied to the composite material coexist. CONSTITUTION:The composite material 6 form the film in which high-polymer materials 7 and the liquid crystal materials 8 to orient the molecules in the prescribed direction by the stress applied to the composite material coexist. Namely, a sealing material 5 is provided in the form of a frame in the peripheral part between respective transparent substrates 1 and 2 and the composite material 6 is sealed between the transparent substrates 1 and 2 enclosed by this sealing material 5. The composite material 6 is formed by mixing the high-polymer materials 7 of a two-pack curing type consisting of a principal component and a hardener or UV curing type and the liquid crystal materials 8. The liquid crystal materials 8 are regularly oriented in the prescribed direction by the stress applied to the composite material while the composite material is held sealed between a pair of the upper and lower transparent substrates 1 and 2. The optical element which is simple in the structure, is good is productivity and is changed in the phase difference according to the electric field impressed to the composite material 6 is obtd. in this way.

公开(公告)号：JPH0497222A

公开(公告)日：1992-03-30

申请号：JP21184190

申请日：1990-08-10

Applicant: CASIO COMPUTER CO LTD

Inventor： NAKAJIMA YASUSHI

IPC: G02F1/1333 ,  G09F9/35

Abstract: PURPOSE:To reduce electric power consumption by adding an ion material which induces disturbing motion in liquid crystal molecules by the voltage impressed between electrodes facing each other in the specific mixture of a composite material. CONSTITUTION:The composite material 6 is formed of the mixture composed of the high-polymer material 7 and the liquid crystal material 8 which is nearly equal in the refractive index in the state of not impressing the voltage between electrodes 3 and 4 facing each other to the refractive index of the high-polymer material. The ion material which induces the disturbing motion in the liquid crystal molecules by the voltage impressed between the electrodes 3 and 4 facing each other is added to this mixture and the orienting state of the liquid crystal material 8 is changed by the disturbing motion generated by the ion current of the ion material at the time of voltage impression to scatter the incident light. The optical element which allows the transmission of light when not impressed with the voltage and can scatter the light when impressed with the voltage and is simple in construction is obtd. in this way.

公开(公告)号：JPH0228620A

公开(公告)日：1990-01-30

申请号：JP9438489

申请日：1989-04-14

Applicant: CASIO COMPUTER CO LTD

Inventor： HIGA MASAKATSU ,  NAKAJIMA YASUSHI ,  AOKI HISASHI

IPC: G02F1/13 ,  G02F1/133 ,  G02F1/1335

Abstract: PURPOSE:To reduce variation in OFF light quantity with the temperature of environment and to stabilize the operation of the shutter by making the transmission axis of at least one of a couple of polarizing plates parallel or orthogonally to the direction of optical anisotropy which is caused by a temperature gradient in the minor side direction of a substrate. CONSTITUTION:The transmission axis B1 of the polarizing plate 348 of at east one of the couple of polarizing plates 348 and 349 is set almost parallel to or almost orthogonal to the direction of the temperature gradient generated in the liquid crystal shutter and the transmission axis B2 of the other polarizing plate 349 is made almost orthogonal to or parallel to the transmissive axis B1. The orientation processing direction A1 or A2 of at least one of both substrates 341 and 342 is made to cross one or the other transmission axis B1 or B2 at a specific angle. Consequently, the variation in the quantity of transmissive light at the time of the on-off operation of the shutter with the ambient temperature is nearly eliminated to perform stable operation even against the variation in the ambient temperature.