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11. 发明专利

JPH04372929A ANTIFERROELECTRIC LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPH04372929A
公开(公告)日：1992-12-25
申请号：JP15048891
申请日：1991-06-21
申请人： TOYOTA MOTOR CORP
发明人： UENO HIDEAKI , NONOBE YASUHIRO
IPC分类号： G02F1/1335 , G09G3/36
摘要： PURPOSE:To provide an antiferroelectric liquid crystal display element having a high contrast ratio for displaying light and shade and not affected by the change of the threshold value voltage due to temperature. CONSTITUTION:The long axis direction of the liquid crystal molecule of an antiferroelectric liquid crystal cell arranged between a pair of polarizing plates arranged on a cross nicol is inclined at an nonzero angle against the polarization direction of the polarizing plate on the incidence side in the antiferroelectric state while no voltage is applied. When a triangular wave is applied, the permeability is largely changed in the range of the fixed inclination angle, the permeability becomes O in the uniform ferroelectric state when the negative electrode side voltage is applied, high permeability is obtained in the uniform ferroelectric state when the positive electrode side voltage is applied, and a high contrast ratio 200 or above is obtained. A liquid crystal display element is driven by the voltage sufficiently higher than the threshold value voltage, and it is not affected by the change of the threshold value voltage due to temperature.

12. 发明专利

JPH04102823A FORMING METHOD FOR GLASS SUBSTRATE FOR CURVED SURFACE LIQUID CRYSTAL CELL 失效
公开(公告)号：JPH04102823A
公开(公告)日：1992-04-03
申请号：JP22163990
申请日：1990-08-22
申请人： TOYOTA MOTOR CORP , KAWAMURA KOUGIYOU KK
发明人： UENO HIDEAKI , HIBINO KOETSU , YOKOISHI SHOJI , SHIMIZU TATSUHIKO , KAWAMURA TAKUMI , TAKENAKA HIROSHI
IPC分类号： G02F1/13 , G02F1/1333
摘要： PURPOSE:To prevent an end part of a substrate from chipping by heating and pressing two glass substrates, which are formed gravitationally to the same curved surfaces with a specific radius of curvature, as to the curved-surface liquid crystal cell, and further performing press working to a smaller radius of curvature. CONSTITUTION:The two glass substrates 1 are dried after ultrasonic-wave cleaning, put one over another across an ITO thin film 2, and mounted on a metallic bottom force installed in a heating furnace equipped with a heater. Then the two glass substrates 1 are heated to the specific temperature and formed to the same curved surfaces having the specific radius of curvature. In a principal forming process, the two glass substrates 1 are heated to the same extent with the gravitational formation and heated and pressed, and the press working is performed to obtain the same curved surfaces which has the smaller radius of curvature are obtained. At this time, compression-directional stress which operates on both the end surfaces of the concave- side substrate and drawing-directional stress which operates on both the end surfaces of the convex-side substrate decrease. Consequently, both the ends of the substrates are prevented from chipping and the gap between the substrates is made uniform.

13. 发明专利

JPH01156726A TWISTED NEMATIC LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPH01156726A
公开(公告)日：1989-06-20
申请号：JP31651587
申请日：1987-12-15
申请人： TOYOTA MOTOR CORP
发明人： FUKUOKA YUKO , UENO HIDEAKI , ABE YOKO
IPC分类号： G02F1/137 , G02F1/139
摘要： PURPOSE:To improve a contrast ratio by setting a phase difference within a specific range and the degree of polarization of a couple of polarizing plates to >=97%. CONSTITUTION:Transparent substrates 61 and 62 of plastic, etc., are so arranged that the phase difference of a nematic liquid crystal layer 3 is 1.4-2.3 or 3.3-4.5 and layer 3 is sandwiched. Transparent conductive films 51 and 52 of ITO, NESA, etc., are formed on the internal surfaces of the substrates 61 and 62 by a PVD method or CVD method. Light distribution films 41 and 42 are arranged on the surfaces of the films 51 and 52, and the layer 3 with positive dielectric anisotropy and the peripheral edge part are sealed in a gap (d) formed between the films 41 and 42 with spacers by using seal parts 2. A couple of polarizing plates 11 and 12 whose polarization degree is >=97% are stuck on the external surfaces of the substrates 61 and 62. Consequently, extremely high light transmissivity, i.e. contrast ratio is obtained.

14. 发明专利

JPH0196289A LIQUID CRYSTAL COMPOSITION 失效
公开(公告)号：JPH0196289A
公开(公告)日：1989-04-14
申请号：JP25405587
申请日：1987-10-08
申请人： TOYOTA MOTOR CORP
发明人： ABE YOKO , UENO HIDEAKI , OKUWA NAOMI
IPC分类号： G02F1/137 , C09K19/54
摘要： PURPOSE:To obtain an inexpensive dynamic scattering mode (DSM) type liquid crystal composition having low current consumption and high speed of response, by blending a liquid crystal compound having negative dielectric anisotropy with a specific amount of di-2-ethylhexyl adipate. CONSTITUTION:The aimed composition obtained by blending (A) a liquid crystal compound having negative anisotropy of a higher dielectric constant in the minor axis direction of liquid crystal molecules than that in the major axis direction with (B) di-2-ethylhexyl adipate in an amount of 1-7pts.vol. (preferably 4-7pts.vol.) based on 100pts.vol. total composition. Furthermore, an additive, such as electrolytic compound, as necessary, may be further blended. When the above-mentioned composition is especially applied to a large-sized liquid crystal panel, cost down is extremely great.

15. 发明专利

JPS63118718A PRODUCTION OF LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPS63118718A
公开(公告)日：1988-05-23
申请号：JP26636986
申请日：1986-11-07
申请人： TOYOTA MOTOR CORP
发明人： OTA KAZUHIDE , UENO HIDEAKI , HIBINO KOETSU
IPC分类号： G09F9/00 , G02F1/133 , G02F1/1335
摘要： PURPOSE:To prevent visuality from being deteriorated by working burrs so that their height from a film face is uniformed and sticking the reflecting face side peripheral edge part of a reflecting member fast to the peripheral edge part of a cell on the optical film sticking side while holding a gap between the reflecting face and a film face. CONSTITUTION:An optical film 2 is stuck to one outer surface of a liquid crystal cell 1 and the peripheral edge part of the film 2 is cut off from the normal direction of a film surface by a mechanical means to form burrs 3 projecting from the film surface on the cut part. Then, the burrs 3 are worked so that the height from the film surface is uniformed and the reflecting face side peripheral edge part of the reflecting member is stuck fast to the optical film sticking peripheral edge parts on both the sides of the cell 1 while holding the gap between the reflecting face and the film face by the burrs 3. Consequently, the generation of a troublesome phenomenon such as interference stripes and double display can be prevented and the invasion of uncured sealing agent into the gap between the optical film and the reflecting plate immediately after its application can be suppressed.

16. 发明专利

JPS6342413A METHOD AND INSTRUMENT FOR MEASURING FLATNESS 失效
公开(公告)号：JPS6342413A
公开(公告)日：1988-02-23
申请号：JP18705886
申请日：1986-08-08
申请人： TOYOTA MOTOR CORP
发明人： HIBINO KOETSU , UENO HIDEAKI
IPC分类号： G01B11/30
摘要： PURPOSE:To easily measure the flatness of a body to be measured with practical accuracy by projecting reflected light images of the surface of the body to be measured and a reference reflecting surface on the same screen, and measuring the deviation between both light images. CONSTITUTION:This instrument consists of a slide projector 1 which has a light source and a grating type pattern internally, a reference reflecting plate 2 which has the flat reference reflecting surface 21 on the top surface and is positioned below the projector, and the screen 3 where the two reflected light images of the plate type body 4 to be measured on the surface 21 and the surface 21 are projected. The center axis of the projection light of from the projector 1 is slanted at alpha (

17. 发明专利

JPS62286018A PRODUCTION OF LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPS62286018A
公开(公告)日：1987-12-11
申请号：JP12883986
申请日：1986-06-03
申请人： TOYOTA MOTOR CORP
发明人： OOTA KAZUHIDE , HIBINO KOETSU , UENO HIDEAKI
IPC分类号： G02F1/13 , G02F1/133 , G02F1/1335 , G09F9/00
摘要： PURPOSE:To prevent a seal agent from penetrating a gap part between an optical film and a reflecting plate or a liquid crystal cell by cutting the optical film like a quarter-wave plate at a certain depth with a dumbbell having double blades to form burrs (projecting parts) having a uniform height. CONSTITUTION:A dumbbell 1 is equipped with two blades 2 and 2', and heated blades 2 and 2' are pressed to an optical film 4, which is adhered to a plate- shaped liquid crystal cell 3 with an adhesive 21, with a certain load P to form burrs (projecting parts) 5-8 having a uniform height (h) in the right and the left of blades. A reflecting plate 13 is laminated on the cut optical film 4 and the liquid crystal cell 3 and the reflecting plate 13 are stuck to each other to complete the lamination process. A seal part 14 is formed on the outside peripheral part of laminated reflecting plate 13, optical film 4, and plate-shaped liquid crystal cell 3. Thus, penetration of the sealing adhesive is prevented by the first, the second, or the third dam, and defective goods due to penetration of the seal agent over three dams are eliminated.

18. 发明专利

JPS62174721A MANUFACTURE OF LIQUID CRYSTAL GLARE SHIELD MIRROR 失效
公开(公告)号：JPS62174721A
公开(公告)日：1987-07-31
申请号：JP19019185
申请日：1985-08-29
申请人： TOYOTA MOTOR CORP
发明人： HIBINO KOETSU , OTSUKA YASUHIRO , UENO HIDEAKI
IPC分类号： G02B5/08 , B60R1/04 , G02F1/13 , G02F1/133 , G02F1/1335
摘要： PURPOSE:To reduce considerably the formation of interference fringes and to improve visibility by curving a liquid crystal cell outward and superposing it upon a mirror, and applying an adhesive to the peripheral parts of the liquid crystal cell and mirror while a load is placed in such a direction that the both are clamped. CONSTITUTION:A GH type liquid crystal cell 1 which is manufactured by a normal method consists of a couple of glass plates 3 where GH type liquid crystal 2 is charged internally, and a transparent electrode and an orientation film (both not shown in figure) are formed inside those glass plates 3. Such GH type liquid crystal cell 1 is mounted on a surface plate, its curvature is checked by using a skimmer, and a cellulose-based quarter-wavelength phase difference plate 5 is stuck on the recessed part side of the curvature with an adhesive compound 4 by using a roller, etc. The surface of a glass plate 6, on the other hand, is coated with an Al film 7 forming a mirror surface by a vacuum film forming method to form a mirror 8. Then, the cell 1 is superposed on the mirror 8 with the quarter-wavelength phase difference plate 5 inside to obtain a mirror assay. Then, three assays are installed between press patterns 9 across plate type rubber 10 as an elastic member and clamped with bolts, thereby fixing the both with the adhesive.

19. 发明专利

JPS6252525A MANUFACTURE OF LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPS6252525A
公开(公告)日：1987-03-07
申请号：JP19331385
申请日：1985-09-02
申请人： TOYOTA MOTOR CORP
发明人： HAMAGUCHI SHIGEKI , OTSUKA YASUHIRO , UENO HIDEAKI
IPC分类号： G02F1/13 , G09F9/35
摘要： PURPOSE:To apply uniform pressure and to improve the parallelism of the transparent substrate of a liquid crystal cell, i.e. uniformity of a cell gap by arranging projection streaks slantingly on a transparent substrate. CONSTITUTION:An ITO film 2 is formed on float plate glass 1 which is cleaned and dried sufficiently. The glass is dipped in a carboxylic acid chromium complex and dried to form an oriented film 3. Thus, two float glass plates 1 are formed and superposed one over the other with their ITO films 2 put opposite each other by scattering polystyrene beads over one plate and applying an epoxy resin adhesive 4 to the other by screen printing, thereby forming a liquid crystal cell. A silicone rubber sheet 5 is interposed between liquid crystal cells, semicircularly sectioned projections streaks 6 are formed slantingly on both surfaces, and they are arranged across the liquid crystal cells so that the projection streaks 6 cross one another. Nematic liquid crystal 7 having dielectric anisotropy is injected from a liquid crystal injection hole and polarizing plates 8 are stuck on both surfaces of a liquid crystal cell at right angles.

20. 发明专利

JPS6247031A FORMING METHOD FOR ORIENTED FILM ON CURVED SUBSTRATE OF LIQUID CRYSTAL DISPLAY ELEMENT 失效
公开(公告)号：JPS6247031A
公开(公告)日：1987-02-28
申请号：JP18784785
申请日：1985-08-26
申请人： TOYOTA MOTOR CORP
发明人： FUKUOKA YUKO , OTSUKA YASUHIRO , HAMAGUCHI SHIGEKI , UENO HIDEAKI
IPC分类号： G02F1/1337 , G02F1/133 , G09F9/35
摘要： PURPOSE:To form quickly an oriented film uniform in film thickness on a transparent substrate having a curved shape by giving a curved surface to the substrate and providing a guide of a roll equally distant from the substrate with the same curvature as the curved surface of the substrate in the range of contacting between the roll and the substrate. CONSTITUTION:An ITO film 2 is formed on the convex of one curved glass 1 and is formed on the concave of the other curved glass 1, and a letterpress printing machine 11 is used to form oriented films 3 on ITO films 2 of curved glasses. A shaft 16 of a roll 13 whose surface a printing plate 15 is attached to is placed on a guide 14, and the roll 13 is moved on the guide 14 while rotat ing by a driving means. Therefore, the interval between the guide 14 and a processing base 12 is made slightly longer than the radius of the roll 13. A part of the guide 14 has a curved part 14 which is formed with the same curva ture as curved glasses 1 on which oriented films 3 are formed. The roll 13 is moved while rotating along the curved part 14a of the guide 14 in the part contacting with curved glasses 1 to print a polyimide solution on curved glasses.

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