公开(公告)号：JPH0836182A

公开(公告)日：1996-02-06

申请号：JP11720895

申请日：1995-05-16

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI

IPC: G02F1/137 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/141

Abstract: PURPOSE:To provide a liquid crystal element having high contrast, fast response rate, high precision, and high luminance in which the liquid crystal has a bookshelf structure or a structure with a small gradient of layers nearly to the bookshelf structure and especially shows excellent orientation state. CONSTITUTION:A liquid crystal compsn. 15 containing a liquid crystal comprising a single component or several components without having cholesteric phase is held between substrates 11a and 11b facing each other. In this element, the surface energy gamma1 of a polyimide film or aromatic polyamide film 13a formed in the substrate 11a side and the surface energy gamma2 of the film in the substrate 11b side are in the relation of gamma1>gamma2. Further, only the polyimide or aromatic polyamide film 13a is subjected to uniaxial orientation treatment.

公开(公告)号：JPH05216034A

公开(公告)日：1993-08-27

申请号：JP4061992

申请日：1992-01-31

Applicant: CANON KK

Inventor： HANIYU YUKIO ,  NAKAMURA KATSUTOSHI

IPC: G02F1/1337

Abstract: PURPOSE:To improve the durability of a device by preventing the transfer of a liquid crystal and lessening the increase in the cell thickness at the ends of a cell. CONSTITUTION:This ferroelectric liquid crystal element has the ferroelectric liquid crystal 15 and a pair of substrates 11a, 11b which face each other by holding this ferroelectric liquid crystal 15 in-between, are formed with electrodes 12a, 12b for impressing a voltage to the ferroelectric liquid crystal on the respective opposite surfaces and are subjected to a uniaxial orientation treatment of the same direction in nearly parallel with each other for orienting the ferroelectric liquid crystal 15. The relation between the cone angle THETA of the ferroelectric liquid crystal 15 and the inclination angle delta of a chiral smectic layer has the orientation state expressed by delta/THETA>=0.80. In addition, the orientation state thereof exhibits at least two stable states and thetaa which is half the angle formed by these optical axes and the tilt angle theta of the ferroelectric liquid crystal have a relation theta/2

公开(公告)号：JPH04294321A

公开(公告)日：1992-10-19

申请号：JP8110591

申请日：1991-03-22

Applicant: CANON KK

Inventor： KODERA YASUHITO ,  HANIYU YUKIO ,  NAKAMURA KATSUTOSHI ,  HOTTA SHIGEHISA

IPC: G02F1/13 ,  G02F1/1337 ,  G02F1/1341 ,  G02F1/137 ,  G02F1/141

Abstract: PURPOSE:To place the entire surface of a liquid crystal panel in a uniform orientation state. CONSTITUTION:A couple of substrates 11a and 11b which have electrodes are arranged having their electrode surfaces opposite each other, a sealant 17 is provided at the peripheral edge part of the substrates, and a liquid crystal injection hole 21 is bored in part of the sealant to charge liquid crystal between both the substrates through the injection hole to form the ferroelectric liquid crystal element. Then this ferroelectric liquid crystal element has a -45-+45 deg. angle of intersection in the direction of rubbing for orienting the liquid crystal and the direction of injection of the liquid crystal from the injection hole.

公开(公告)号：JPH04232920A

公开(公告)日：1992-08-21

申请号：JP40893290

申请日：1990-12-28

Applicant: CANON KK

Inventor： KODERA YASUHITO ,  NAKAMURA KATSUTOSHI ,  HANIYU YUKIO ,  HOTTA SHIGEHISA

IPC: G02F1/133 ,  G02F1/1337

Abstract: PURPOSE:To improve contrast and to increase driving margin by forming a uniform orientation showing bistability in a ferroelectric liquid crystal. CONSTITUTION:The ferroelectric liquid crystal element consists of a pair of substrates (101, 101') and a ferroelectric liquid crystal between the substrates. Each substrate has uniaxial orientation axis (401, 402) and is provided with electrode groups to apply voltage on the ferroelectric liquid crystal and to energize. The uniaxial orientaion axes of substrates cross each other by a specified angle theta (403), and the pretilt angle between the liquid crystal orientation plane and the director of liquid crystal molecule is between >=5 deg. and

公开(公告)号：JPH112827A

公开(公告)日：1999-01-06

申请号：JP15191497

申请日：1997-06-10

Applicant: CANON KK

Inventor： OKADA SHINJIRO ,  NAKAMURA KATSUTOSHI ,  SUNAGA MAKI ,  MUNAKATA HIROHIDE ,  MIZUTANI HIDEMASA

IPC: G02F1/1341

Abstract: PROBLEM TO BE SOLVED: To manufacture a liquid crystal element of high quality with good manufacture efficiency by specifying the physical direction of an upper and a lower substrate and the shape of an injection hole in consideration of a difference in surface energy between the substrates. SOLUTION: The pattern of the sealing material 3 of a liquid crystal cell 5 is provided with a 1st opening part 4 for injecting liquid crystal 8 and a 2nd opening part 9 for allowing excessive liquid crystal 8 to flow out of the cell 5. The liquid crystal cell 5 is so formed that the difference between the large surface energy of the substrate 1 and the surface energy of the liquid crystal 8 is >=20 dyne/cm and the striped electrodes of the substrate 1 cross the 1st opening part 4, so the preferential direction of liquid crystal injection is as shown by an arrow 12. Liquid crystal 8 which enters the cell as shown by an arrow 11 is therefore injected into the cell speedily in the preferential direction 12. The 1st opening part 4 is formed to 95 to 100% of the length of the side where the opening part 4 is provided, so the liquid crystal 8 reaches both the sides of the cell sufficiently and no defect in liquid crystal injection is caused.

公开(公告)号：JPH10197884A

公开(公告)日：1998-07-31

申请号：JP35680496

申请日：1996-12-27

Applicant: CANON KK

Inventor： KOJIMA MAKOTO ,  NAKAMURA KATSUTOSHI

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

Abstract: PROBLEM TO BE SOLVED: To provide the liquid crystal element which has neither an orientation defect nor uneven threshold characteristics due to an injection defect of liquid crystal and unevenness of a cell gap by preventing the injection defect and unevenness of the cell gap in a process for charging liquid crystal in a liquid crystal cell. SOLUTION: The liquid crystal cell 1 is provided with a 1st opening part 3 and a 2nd opening part 4, and the pressure P3 of the 1st opening part 3, the pressure P2 of the 2nd opening part 4, and the pressure P3 of a display area are so controlled individually that P1 >P2 and P1 -P3 ; and liquid crystal 10 is injected into the cell 1 from the 1st opening part 3 by utilizing the pressure difference between the 1st opening part 3 and 2nd opening part 4 and liquid crystal contaminated with impurities is made to flow out of the 2nd opening part 4. Then the cell gap due to the pressure difference in the cell 1 is eliminated by setting the pressure so that 0 .

公开(公告)号：JPH10186388A

公开(公告)日：1998-07-14

申请号：JP35095096

申请日：1996-12-27

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI ,  KOJIMA MAKOTO ,  OKADA SHINJIRO

IPC: G02F1/1341 ,  C09K19/02 ,  G02F1/13

Abstract: PROBLEM TO BE SOLVED: To provide a production method for liquid crystal element capable of preventing generation of an unpoured region of a liquid crystal, preventing degradation of a liquid crystal material by deterioration, etc., attaining in plane uniformity of cell gaps and pouring the liquid crystal therein in a shorter time. SOLUTION: A cell 1 having a first opening part 12 and a second opening part 13 is formed by arranging a pair of substrates 11a, 11b to face each other. After executing degassing treatment of the cell 1, pressure difference is given between the first opening part 12 and the second opening part 13 and the heated liquid crystal is poured in the cell 1 from the first opening part 12 during a prescribed period, further, while discharging the liquid crystal passing through inside of the cell 1 out of the second opening part 13, the liquid crystal is charged in the cell 1.

公开(公告)号：JPH10186387A

公开(公告)日：1998-07-14

申请号：JP35073096

申请日：1996-12-27

Applicant: CANON KK

Inventor： KOJIMA MAKOTO ,  NAKAMURA KATSUTOSHI ,  OKADA SHINJIRO

IPC: G02F1/1341 ,  C09K19/02 ,  G02F1/13

Abstract: PROBLEM TO BE SOLVED: To prevent degradation of liquid crystal material by deterioration, etc., to attain in-plane uniformity of cell gaps and to enhance the reliability of liquid crystal element. SOLUTION: When a liquid crystal 24 is charged from the first opening part 12 in a cell 1 having a first opening part 12 and a second opening part 13 which are constituted by disposing a pair of substrates to face each other by utilizing pressure difference provided between the first opening part 12 and the second opening part 13, a contact preventing means 22 for preventing contact of a gas for pressurizing the first opening part 12 with the liquid crystal 24 is provided. Thus the gas utilized for pressurizing does not dissolve in the liquid crystal material poured in the cell.

公开(公告)号：JPH09236810A

公开(公告)日：1997-09-09

申请号：JP34756696

申请日：1996-12-26

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI ,  SUNAGA MAKI ,  KOJIMA MAKOTO

IPC: G02F1/1341 ,  C09K19/02 ,  G02F1/13

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a liquid crystal element which prevents degradation of liquid crystal materials from alteration, etc., uniformizes cell gaps in a plane and is capable of injecting a liquid crystal in a short time. SOLUTION: A pair of substrates 11a, 11b are disposed to face each other to form a cell 1 having a first opening 12 and a second opening 13 and pressure reference is formed between the first opening 12 and the second opening 13. The liquid crystal is charged in the cell 1 while pouring the heated liquid crystal in the cell 1 from the first opening 12 in a prescribed time and discharing the liquid crystal which has passed through the cell 1 from the second opening 13. Thus, even when smetic liquid crystal having high vapor pressure and high viscosity is used, alteration thereof from vaporation can be prevented and gap defective caused by pressure difference between inside and outside of the cell can be prevented.

公开(公告)号：JPH0843828A

公开(公告)日：1996-02-16

申请号：JP17408994

申请日：1994-07-26

Applicant: CANON KK

Inventor： NAKAMURA KATSUTOSHI

IPC: G02F1/1337

Abstract: PURPOSE:To provide a high contrast liquid crystal element showing uniform and excellent orientation state by performing more excellent orientation state and performing a liquid crystal layer having small layer tilt angle as same as or near the bookshelf structure. CONSTITUTION:The liquid crystal element is obtained by arranging a ferroelectric liquid crystal composition containing a compound expressed by formulas I and III between glass substrates 11a and 11b having respectively orientation control layers 13a and 13b having a condensed polycyclic hydrocarbon in the skeleton.