公开(公告)号：AT169414T

公开(公告)日：1998-08-15

申请号：AT93100950

申请日：1993-01-22

Applicant: CANON KK

Inventor： HANYU YUKIO ,  TSUBOYAMA AKIRA ,  TANIGUCHI OSAMU ,  MIHARA TADASHI ,  NAKAMURA KATSUTOSHI ,  MORI SUNAO

IPC: G02F1/1337 ,  G02F1/141 ,  G02F1/137

Abstract: A ferroelectric liquid crystal device is constituted by disposing a ferroelectric liquid crystal between a pair of substrates having thereon electrodes for voltage application and provided with uniaxial alignment axes, as by rubbing, so as to provide a high pretilt angle of at least 10 degrees. A problematic liquid crystal movement in such a high-pretilt angle ferroelectric liquid crystal device is suppressed by improving a smectic layer structure therein, inclusive of a symmetry of pretilt angles at the pair of substrate boundary surfaces. Such an improved smectic layer structure is accomplished by a realigning treatment after cooling to the chiral smectic phase or in the final stage of the cooling to the chiral smectic phase as by application of an AC electric field and/or by repetitive heating-cooling in the chiral smectic phase. The improved smectic layer structure is represented by, e.g., an X-ray diffraction peak having an increased peak area and/or a decreased half-value width.

公开(公告)号：AU673459B2

公开(公告)日：1996-11-07

申请号：AU7449094

申请日：1994-10-07

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI ,  KANEKO SHUZO ,  KISHI ETSURO ,  MIYATA HIROKATSU ,  SHIBATA MASAAKI

IPC: G02F1/1337 ,  G02F1/141 ,  G02F1/137

公开(公告)号：JP2003145029A

公开(公告)日：2003-05-20

申请号：JP2001348140

申请日：2001-11-14

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI ,  IIYAMA TOMONORI

IPC: G03F7/16 ,  B05D3/02 ,  B05D3/12 ,  H01L21/027

Abstract: PROBLEM TO BE SOLVED: To provide a method of forming a film having uniform film thickness even when the thick film is formed by applying a coating liquid on a substrate to form the coating film and removing a solvent in the coating film efficiently in a short time. SOLUTION: The solvent is removed by heating the substrate while keeping the certain degree of vacuum in a vacuum chamber by continuing the replacement with a gas containing no solvent in the vacuum chamber.

公开(公告)号：JP2000047231A

公开(公告)日：2000-02-18

申请号：JP22954498

申请日：1998-07-31

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI

IPC: G02F1/1341

Abstract: PROBLEM TO BE SOLVED: To provide a method for injecting liq. crystal high in injection efficiency without damaging a panel. SOLUTION: A liq. crystal injecting method injects liq. crystal 2 into a panel 1 comprising a pair of substrates 13 and 14 which are placed oppositely to each other at a constant interval. In this case, a jig 6 is set at a step 15 of the upper and the lower substrates having an injection hole 3 of the panel 1 so that a space formed between the panel 1 and the jig 6 is larger than the content volume of the panel and liq. crystal is arranged in this space.

公开(公告)号：JPH10197883A

公开(公告)日：1998-07-31

申请号：JP35656896

申请日：1996-12-27

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI ,  OKADA SHINJIRO ,  KOJIMA MAKOTO ,  SUNAGA MAKI ,  MIZUTANI HIDEMASA

IPC: G02F1/1341 ,  B29C39/24 ,  B29C39/38 ,  B29K27/12 ,  B29L11/00

Abstract: PROBLEM TO BE SOLVED: To provide a process for producing a liquid crystal element capable of preventing the deterioration of a liquid crystal material by the denaturization, etc., thereof, making a cell gap uniform within the plane and rapidly injecting smectic liquid crystals. SOLUTION: A cell 1 having a first aperture 12 and a second aperture 13 is formed by arranging a pair of substrates 11a, 11b opposite to each other. The first aperture 12 and the second aperture 13 are provided with a pressure difference. The liquid crystals having a smectic phase previously heated to a liquid phase are injected into the cell 1 for the prescribed time from the first aperture 12. The liquid crystals are packed into the cell while the liquid crystals past the inside of the cell 1 are discharged from the second aperture 13. The liquid crystals in the part of the second aperture 13 are cooled to the smectic phase before the difference pressure between the first aperture 12 and the second aperture 13 is released. As a result, the generation of the uninjected regions of the liquid crystals which arises heretofore by accompanying with the release of the differential pressure described above is averted.

公开(公告)号：JPH10197882A

公开(公告)日：1998-07-31

申请号：JP35656796

申请日：1996-12-27

Applicant: CANON KK

Inventor： KODERA YASUHITO ,  NAKAMURA KATSUTOSHI

IPC: G02F1/1341 ,  B29C39/24 ,  B29L11/00

Abstract: PROBLEM TO BE SOLVED: To prevent the change of properties by the evaporation of a liquid crystal material at the time of liquid crystal injection and to improve a display grade by heating the liquid crystals to a temp. at which the liquid crystals attain a smectic A phase or attain the co-existing state of the smectic A phase and isotropic phase at the time of packing the liquid crystals into a cell constituted by arranging substrates opposite to each other. SOLUTION: At the time of packing the liquid crystals into the cell 1 composed of a pair of the substrates opposite to each other, an aperture 12 part which is the injection port for the liquid crystals and an effective optical modulation region 16 are sealed into a pressurization vessel 17 and an aperture 13 part which is an outflow port for the liquid crystals is installed outside this pressurization vessel. The aperture 12 is immersed at this state into a liquid crystal tray 18 filled with the liquid crystals 19 previously heated to the temp. at which the liquid crystals attains the smectic A phase or the temp. at which the liquid crystals attains the co-existing state of the smectic A phase and the isotropic phase. The inside of the pressurization vessel 17 is then pressurized. The pressure PI (the pressure in the pressurization vessel 17) acting on the aperture 12 and the pressure P2 acting on the aperture 13 are set at a relation P1>P2 and the liquid crystals 19 are injected into the cell 1 according to this pressure difference.

公开(公告)号：JPH0798458A

公开(公告)日：1995-04-11

申请号：JP20283394

申请日：1994-08-03

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI ,  ITO YASUHIRO ,  HANYU YUKIO

IPC: G02F1/1337 ,  C09K19/02 ,  G02F1/141

Abstract: PURPOSE:To provide the liquid crystal element which is improved in display characteristics by improving the orientation state of liquid crystal molecules. CONSTITUTION:The liquid crystal of which the relation between the interlayer spacing (dA) at a first transition point where the interlayer spacing decreases near the temp. shifting from an SmA phase to an Sm*C phase without having a Ch phase and the interlayer spacing (dmin) at the second transition point where the interlayer spacing changes from a decrease again to an increase according to the temp. fall from the first transition point satisfies 0.99

公开(公告)号：JPH06308499A

公开(公告)日：1994-11-04

申请号：JP9774293

申请日：1993-04-23

Applicant: CANON KK

Inventor： SHIBATA MASAAKI ,  HANIYU YUKIO ,  NAKAMURA KATSUTOSHI

IPC: G02F1/1337 ,  B82B1/00

Abstract: PURPOSE:To uniformize orientation and to obtain equal and symmetric inversion threshold between bistable two states by subjecting the one substrate to perpendicular orientation, forming a film on the other substrate, orienting this film in one direction, and then orienting the first substrate in a different direction as second orientation. CONSTITUTION:This liquid crystal element has a substrate 11 on which a hybrid oriented film 15 is formed and a substrate 11' having an oriented film 15' treated by perpendicular orientation. The oriented film 15 is subjected to first orientation in one direction (shown as arrow 12) and then to second orientation in a different direction (arrow 13). The first rubbing direction 12 differs from the second rubbing direction 13 by an angle thetam. thetam is defined positive in the clockwise direction. When a liquid crystal having negative Ps is used, thetam is positive. When a liquid crystal having positive Ps is used, thetam is negative. The absolute value of Pm is preferably almost same as the apparent tilt angle thetaa of the liquid crystal.

公开(公告)号：JPH06186568A

公开(公告)日：1994-07-08

申请号：JP35478392

申请日：1992-12-17

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI ,  HANIYU YUKIO

IPC: G02F1/133 ,  G02F1/1337

Abstract: PURPOSE:To provide the ferroelectric liquid crystal device which eliminates unequalness within a panel plane. CONSTITUTION:This liquid crystal device has a ferroelectric liquid crystal 14 and a pair of substrates 11a, 11b which face each other by holding this ferroelectric liquid crystal 14 in-between, are formed with electrodes for applying voltage to the ferroelectric liquid crystal 14 respectively on the opposite surfaces and are subjected to uniaxial orientation treatments in order to orient the ferroelectric liquid crystal 14. The apparent tilt angle of the above-mentioned liquid crystal device is made larger than in the case of not applying AC by the treatment to apply the AC to the device. The inclination directions of this liquid crystal and at the boundary between the substrates are reverse directions between the upper and lower substrates and the pretilt angle is =25nC/cm .

公开(公告)号：JPH06186566A

公开(公告)日：1994-07-08

申请号：JP35478892

申请日：1992-12-17

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI ,  HANIYU YUKIO

IPC: G02F1/1337

Abstract: PURPOSE:To provide the ferroelectric liquid crystal device which eliminates seizure, is free from a change in characteristics with a temp. history and has excellent durability. CONSTITUTION:This liquid crystal device has a ferroelectric liquid crystal 14 and a pair of substrates 11a, 11b which face each other by holding this ferroelectric liquid crystal 14 in-between, are formed with electrodes for applying voltages to the ferroelectric liquid crystal 14 respectively on the opposite surfaces and are subjected to uniaxial orientation treatments in order to orient the ferroelectric liquid crystal 14. The apparent tilt angle of the liquid crystal device is made larger than in the case of not applying AC by the treatment to apply the AC to the element. The inclination directions of this liquid crystal and at the substrate boundary are the same and the pretilt angle is >=5 deg.. The spontaneous polarization of the ferroelectric liquid crystal 14 is >=25nC/cm .