公开(公告)号：JPH09318938A

公开(公告)日：1997-12-12

申请号：JP13317096

申请日：1996-05-28

Applicant: TOSHIBA CORP

Inventor： OKAMOTO MASUMI ,  ISHIKAWA MASAHITO ,  MANABE ATSUYUKI ,  TANAKA YASUHARU ,  HADO HITOSHI

IPC: G02F1/133 ,  G02F1/1335

Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal display element for high-definition display excellent in visibility by improving the contrast of a liquid crystal display element and visual angle characteristic of a display color. SOLUTION: A visual angle compensating element obtained by assembling negative optical anisotropic optical anisotropic elements 3 and 5 in which the inclination of optical axes are changed from one surface to the other surface to a TDTN(two-domain TN(twisted nematic)) and DDTN(domain divided TN) type liquid crystal display element 4 for driving forming one picture element at plural areas whose orientation characteristics is different is arranged on the liquid crystal element 4 surface for driving. The element can be arranged on both surfaces of the element 4.

公开(公告)号：JPH09203895A

公开(公告)日：1997-08-05

申请号：JP16145496

申请日：1996-06-21

Applicant: TOSHIBA CORP

Inventor： ISHIKAWA MASAHITO ,  MANABE ATSUYUKI ,  TANAKA YASUHARU ,  OKAMOTO MASUMI ,  HADO HITOSHI

IPC: G02B5/30 ,  G02B1/02 ,  G02F1/1335

Abstract: PROBLEM TO BE SOLVED: To reduce field angle dependency of, specially, a contrast ratio and a display color. SOLUTION: This display element is equipped with at least one polarizing plate 1 or 4 and a liquid crystal cell for driving which has liquid crystal e3 sandwiched between two substrates 3a and 3b. Further, the element has the optical anisotropic element 2 constituted by connecting optical anisotropic units along the thickness, and the optical anisotropic units are so arrayed that they are not constant, but minimum in optical-axis angle along the thickness and also negative in optical anisotropy along the thickness. Further, the angle between the optical axis of the optical anisotropic element 2 and the substrate surface of the liquid crystal cell for driving varies continuously or stepwise along the layer thickness of the optical anisotropic element 2. Then an optical anisotropic element which has positive optical anisotropy can be combined with this optical anisotropic element 2.

公开(公告)号：JPH0996790A

公开(公告)日：1997-04-08

申请号：JP25330295

申请日：1995-09-29

Applicant: TOSHIBA CORP

Inventor： TANAKA YASUHARU ,  ISHIKAWA MASAHITO ,  OKAMOTO MASUMI ,  FUKUOKA NOBUKO ,  NINOMIYA TOSHIHIRO ,  OYAMA TAKESHI ,  YOSHIDA NORIHIRO ,  SHOJI MASAHITO ,  HADO HITOSHI

IPC: G02F1/13 ,  G02F1/133

Abstract: PROBLEM TO BE SOLVED: To obtain a novel high-speed responsive LCD which has a large capacity and is practically usable for high-fineness display by adopting the constitution to approximately parallel the plural liquid crystal molecules of a third liquid crystal layer region with each other and to twist and arrange the liquid crystal molecules within the intra-surface direction of substrates from the one substrate toward the other substrate when no voltage is impressed on electrodes. SOLUTION: The liquid crystal layer 9 consists of the first liquid crystal layer region A, the liquid crystal layer region B and the third liquid crystal layer region C consisting of the plural liquid crystal molecules held between these two regions. The plural liquid crystal molecules in the third liquid crystal layer region C are approximately parallel with each other and are twisted and arranged within the intra-surface direction of the substrates from the one substrate toward the other substrate in the non-impression of the voltage on the electrodes. The inclination of a part of the liquid crystal molecules 9a among the plural liquid crystal molecules in the third liquid crystal layer region C is arranged approximately parallel with the normal direction of the substrates. The state of the liquid crystal layer at the impression of the first voltage attains the state approximate to the bent arrangement in pi cells. The high- speed response is obtd. when the liquid crystal driving voltage is changed.

公开(公告)号：JPH08328045A

公开(公告)日：1996-12-13

申请号：JP13323095

申请日：1995-05-31

Applicant: TOSHIBA CORP

Inventor： HISATAKE YUZO ,  OKAMOTO MASUMI ,  WATANABE RYOICHI ,  HADO HITOSHI

IPC: G02F1/137 ,  G02F1/1337 ,  G02F1/139

Abstract: PURPOSE: To obtain a liquid crystal display element of OCB mode constitution with which the TFT switching elements and MIM elements used for a large- capacity display are usable, the starting time is shortened and the lower voltage for maintaining bent arrangement is necessitated. CONSTITUTION: This liquid crystal display element has a pair of electrodes 13, 14 arranged apart a spacing and a liquid crystal layer 20 arranged between these electrodes. The liquid crystal layer 20 is so arranged that liquid crystal molecules 21 have pretilt angles on the electrode surfaces and that the respective pretilt angles are reversed on both electrode surfaces and the pretilt directions of the liquid crystal molecules 21 are parallel. Further, the liquid crystal display element has a bent arrangement in a state of applying a voltage between the electrodes. The magnitude of the pretilt angles of the liquid crystal molecules 21 vary with the pretilt angle α01 of the one electrode surface and the pretilt angle α02 of the other electrode surface.

公开(公告)号：JPH07234414A

公开(公告)日：1995-09-05

申请号：JP17293594

申请日：1994-07-25

Applicant: TOSHIBA CORP

Inventor： HISATAKE YUZO ,  SATOU MAKIKO ,  ISHIKAWA MASAHITO ,  HADO HITOSHI ,  OKAMOTO MASUMI ,  OYAMA TAKESHI

IPC: G02F1/137 ,  G02F1/133 ,  G02F1/1333 ,  G02F1/1343

Abstract: PURPOSE:To provide an LCD of novel constitution which has a high light scattering characteristic, low driving voltage, bright and high contrast ratio and excellent gradation characteristic, does not invert display in spite of gradation display and is extremely wide in visual field angle. CONSTITUTION:This liquid crystal display element consists of substrates 11, 12 with electrode arranged to face each other and a liquid crystal layer 20 consisting of a nematic liquid crystal compsn. held between these substrates. At least one of the substrates of the substrates 11, 12 with the electrodes arranged to face each other have the regions consisting of conductor parts 13a, 14a having the electrode structure specified in the width of the widest parts to =S/2 is satisfied when the width of the narrowest parts of the non-conductor parts 13b, 14b is defined as S and the spacing between the electrodes of both substrates arranged to face each other as D.

公开(公告)号：JPH0728067A

公开(公告)日：1995-01-31

申请号：JP8685394

申请日：1994-04-25

Applicant: TOSHIBA CORP

Inventor： HARUHARA KAZUYUKI ,  HASEGAWA TSUTOMU ,  OSADA HIROYUKI ,  YAMAMOTO TAKESHI ,  OKAMOTO MASUMI ,  YAMAMOTO TAKAHIRO

IPC: C08G73/10 ,  G02F1/1337

Abstract: PURPOSE:To provide a liquid crystal display device which is wide in effective visual field angle and lessens abnormal display. CONSTITUTION:This liquid crystal display device is provided with installs a liquid crystal cell packed with liquid crystals 4 between a pair of substrates 1a, 1a on the surface of which oriented films are formed. The device described above forms plural oriented regions varying in the orientation bearings or rising direction of liquid crystal molecules formed within its display screen. The material of the oriented films 3a, 3b is composed of the polyimide selected from the group consisting of a polyimide which has 300 to 400 deg.C glass transition temp., a polyimide which has no two rotationally symmetrical axes in skeleton, a polyimide in which a non-conjugation carbon occupies at 10 to 60% of total carbon atoms exclusive of the imide bonded part in the skeleton, a polyimide which has 4 to 7 specific dielectric constant at 1kH frequency at 20 deg.C, a polyimide in which the tetracarboxylic dianhydride part does not induce free rotation and a polyimide which has >=90% imidization rate.

公开(公告)号：JPH0713166A

公开(公告)日：1995-01-17

申请号：JP15403293

申请日：1993-06-25

Applicant: TOSHIBA CORP

Inventor： HISATAKE YUZO ,  OKAMOTO MASUMI ,  YAMAMOTO TAKAHIRO ,  YAMAMOTO TAKESHI ,  HADO HITOSHI

IPC: G02F1/1337 ,  G02F1/1343

Abstract: PURPOSE:To fix the points where discrination lines are generated by slit parts and to stabilize the generation of the boundary lines for orientation to different liquid crystal orientation states by providing the slit parts along the boundary parts of the different liquid crystal orientation states in respective pixels to at least one of the first electrode and the second electrode. CONSTITUTION:Lower electrodes 55 of a lower substrate 54 are rectangular and the boundaries b0 of the liquid crystal orientation state of a lower oriented film 60 are formed in the prescribed positions bisected in a longitudinal direction. Namely, the regions of the different orientation states shifting the rubbing direction by 180 deg. are formed within one pixel P. The running orientation regions shifting the rubbing directions b1 and c1 by 180 deg. with the boundary b0 bisecting the one pixel P as a boundary are similarly formed on the upper oriented film 53 on an upper substrate 51 as well. Further, the slit parts 61 are formed by each one pixel along the boundaries b0 of the different orientation states on the common electrode 52 of the upper substrate 51. On the other hand, black matrix layers 62, 59 are formed on the lower substrate 54 surface on the rear side of the lower electrodes 55 corresponding to the slit parts 61.

公开(公告)号：JPH075468A

公开(公告)日：1995-01-10

申请号：JP14665193

申请日：1993-06-18

Applicant: TOSHIBA CORP

Inventor： HISATAKE YUZO ,  HIRATA JUNKO ,  OKAMOTO MASUMI ,  YAMAMOTO TAKAHIRO ,  YAMAMOTO TOMIAKI ,  HADO HITOSHI

IPC: G02F1/1337

Abstract: PURPOSE:To provide the liquid crystal display element which is symmetrical in dependency of left and right visual angles and has a wide visual angle with substantially no generation of inversion phenomenon, etc. CONSTITUTION:This liquid crystal display element consists of a liquid crystal cell 4 formed by clamping a liquid crystal layer 18 consisting of a nematic liquid crystal having positive dielectric anisotropy oriented to twist in liquid crystal molecule arrangement by the liquid crystal molecule orientation directions of substrates between two sheets of the substrates 13 and 16 with electrodes 11, 14 forming plural pixels, a negative optically anisotropic element 3 and two sheets of polarizing plates 1, 2 clamping the liquid crystal cell and the optically anisotropic element. The liquid crystal molecule orientation directions by two sheets of the substrates are combined of two kinds. The liquid crystal layer forms the liquid crystal molecule arrangement regions A, B having two kinds of the twist directions. The twist angles of two kinds of the liquid crystal molecule arrangement regions are set at

公开(公告)号：JPH06110060A

公开(公告)日：1994-04-22

申请号：JP26046292

申请日：1992-09-30

Applicant: TOSHIBA CORP

Inventor： OKAMOTO MASUMI ,  HISATAKE YUZO ,  YAMAMOTO TOMIAKI ,  HADO HITOSHI

IPC: G02F1/1337

Abstract: PURPOSE:To decrease the number of generated disclination lines which cause a problem when one pixel is divided into two different-orientation areas by forming areas of pixels, which adjoin to an optional pixel, into the same molecule array area. CONSTITUTION:Pixels a11, a12... and a21, a22... which are arrayed in matrix on a substrate have rectangular surface areas respectively, and each of the pixel is divided into an area A (A1-A3) which differs vertically in molecular array and a B area (B1-B3) which is 180 deg. different in the tilt direction of liquid crystal molecules from the area A about a screen horizontal direction. Further, the pixels are so arrayed that the areas A and B are inverted in position by horizontal lines. For example, the area A2 of the pixel a12 is the same molecular array area with the areas A1, A3, and A5 of other pixels a11 and 13 which adjoin to the pixel a12 on the left and right side and the pixel a22 which adjoins to it the lower side, and the areas B are in the same relation, so that the areas of all the pixels are held substantially in this relation.

公开(公告)号：JPH10239705A

公开(公告)日：1998-09-11

申请号：JP4366797

申请日：1997-02-27

Applicant: TOSHIBA ELECTRONIC ENG ,  TOSHIBA CORP

Inventor： TANAKA YASUHARU ,  OKAMOTO MASUMI ,  HASEGAWA MAKOTO ,  MIDORIKAWA TERUYUKI ,  MONMA KOICHI ,  MIYAZAKI DAISUKE ,  HADO HITOSHI

IPC: G02F1/1339 ,  G02F1/136 ,  G02F1/1368 ,  H01L21/768 ,  H01L23/522

Abstract: PROBLEM TO BE SOLVED: To make it possible to obtain excellent display performance. SOLUTION: This liquid crystal display element is provided with a matrix substrate 1 provided with plural scanning lines 2 and plural signal lines 5 arranged on a first substrate in matrix, a switch element 6 formed at every crossing part between the scanning line 2 and the signal line 5, whose one end is connected to the signal line 5 and on/off operating based on the signal of the scanning line 2, an insulation layer formed so as to cover the signal line 5 and the switch element 6, plural pixel electrodes 10 formed on this insulation layer at every switch element, a contact hole 9 formed on the insulation layer for connecting each pixel electrode 10 with the answering switch element 6, a counter substrate provided with a common electrode formed on a second substrate and a spacer 15 formed on one side substrate for keeping a gap between the matrix substrate and the counter substrate. Then, a positional relation between the spacer 15 and the contact hole 9 closest to this spacer 15 is constituted so that the contact hole 9 exists on a nearly extended line in the orientation processing direction of an oriented film on the substrate surface, on which the spacer 15 is formed viewing from the spacer 15.