公开(公告)号：JPH11131062A

公开(公告)日：1999-05-18

申请号：JP30039897

申请日：1997-10-31

Applicant: TOSHIBA CORP

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

IPC: G02F1/137 ,  C09K19/02 ,  G02F1/13

Abstract: PROBLEM TO BE SOLVED: To obtain the subject element developing excellent temperature characteristics comprising the resistance to the lowering of contrast ratio and the generation of the thickening of dark part, etc., even by varying the temperature and useful for a displaying device of a notebook computer, etc., by using a plurality of specific liquid crystal materials in combination. SOLUTION: This liquid crystal display element contains a liquid crystal composition (A) sandwiched between electrodes and displays by controlling the orientation state of the liquid crystal by the application of potential. Plural liquid crystal materials are used as the composition (A) in such a manner as to keep the value (Z) defined by the formula Δn.Δε/K (Δn is refractive index anisotropy; Δε is dielectric anisotropy; K is elasticity constant of orientation mode to elastic deformation) to a definite level even by the variation of temperature. For example, the plural liquid crystal materials contain a fluorine- containing liquid crystal having tricyclic molecular skeleton and positive temperature coefficient of Z (concretely the compound of the formula I) and a liquid crystal having tetracyclic molecular skeleton and having negative temperature coefficient of Z (concretely the compound of the formula II).

公开(公告)号：JPH09166793A

公开(公告)日：1997-06-24

申请号：JP33968995

申请日：1995-12-26

Applicant: TOSHIBA CORP

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

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

Abstract: PROBLEM TO BE SOLVED: To provide a display element which gives bright display having a fast response rate, extremely small dependence on the visual angle, and almost no temp. dependence and can be practically used. SOLUTION: This element is produced by combining a guest-host liquid crystal display element and an optically compensated birefrengenece(OCB) mode liquid crystal display element. Namely, the liquid crystal layer consists of a liquid crystal material containing liquid crystal compsns. (3A, 3B, 3C) including a dichroic dye and having positive dielectric anisotropy. The orientation direction of liquid crystal molecules 3A near the first substrate 1 makes about 90 deg. angle from the orientation direction of liquid crystal molecules 3C near the second substrate 2. The liquid crystal molecules (3A, 3B, 3C) are arranged between the first and second substrates 1, 2 to form a bend arrangement from a state with no voltage applied or a state with specified or higher voltage applied.

公开(公告)号：JPH09160022A

公开(公告)日：1997-06-20

申请号：JP24835096

申请日：1996-09-19

Applicant: TOSHIBA CORP

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

IPC: G02B5/30 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/137 ,  G02F1/139

Abstract: PROBLEM TO BE SOLVED: To extend an angle of visibility of an electro-optical device optimum to an OCB mode in normally white mode display and a mode similar to the OCB mode. SOLUTION: When a liquid crystal cell 10 with a bend array is combined with an optically anisotropic element 30 as the device 1, the elliptical coefficient Z of a refractive index ellipsoid of the element 30 is expressed by Z=(ndx-ndz)/(ndx-ndy). In this case, the optically anisotropic element 30 capable of satisfying 7

公开(公告)号：JPH09105957A

公开(公告)日：1997-04-22

申请号：JP26441695

申请日：1995-10-12

Applicant: TOSHIBA CORP

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

IPC: G02F1/137

Abstract: PROBLEM TO BE SOLVED: To provide an OCB mode LCD of practicably usable constitution with which a display of a large capacity and high fineness is embodied by shortening the transition time of the OCB mode LCD (OCB mode liquid crystal display element) in a range where the pretilt angle control of liquid crystal molecules is easy. SOLUTION: The transition from the spray arrangement of the liquid crystal molecule arrangement of the OCB mode LCD to bend arrangement is passed through a twist arrangement, by which the transition 18 smoothly induced and is completed in an extremely short time. More specifically, the spray arrangement in the state of not impressing the voltage is set at the molecular arrangement having the twist angle in a range of 2 to 30. The pretilt angle suffices if the angle is set within a range of 0.5 to 5 deg.. A proper amt. of chiral materials may be added to the liquid crystal material in order to generate a prescribed twist angle.

公开(公告)号：JP2003222880A

公开(公告)日：2003-08-08

申请号：JP2002024300

申请日：2002-01-31

Applicant: TOSHIBA CORP

Inventor： YOSHIDA NORIHIRO ,  YAMAMOTO TAKESHI

IPC: G02B5/20 ,  G02F1/1335 ,  G02F1/1339

Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal display device having excellent uniformity of inter-substrate spacing. SOLUTION: The liquid crystal display device 1 is furnished with color filter layers 18 having first to third color regions 15a to 15c, a plurality of spacers 17 and peripheral edge light shielding layers 16, in which the third color regions 15c are formed backward of the first and second color regions 15a and 15b; each of a plurality of the spacers 17 has a structure successively laminated with an intermediate layer consisting of the same material as the material of the color region 15c on the lowermost layer with at least either of the color regions 15a and 15b as the lowermost layer; and the uppermost layer consisting of the same material as the material of the light shielding layers 16 and the intermediate layers are all spaced from the color regions 15c. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2001264741A

公开(公告)日：2001-09-26

申请号：JP2000074484

申请日：2000-03-16

Applicant: TOSHIBA CORP

Inventor： YOSHIDA NORIHIRO ,  HADO HITOSHI

IPC: G02F1/1339 ,  G02F1/1333 ,  G02F1/1335

Abstract: PROBLEM TO BE SOLVED: To shorten the thermosetting time in forming a plurality of thin film patterns containing a photosensitive resin on a substrate in the manufacturing process of a liquid crystal display device. SOLUTION: The method for manufacturing the liquid crystal display device is provided with a step to form a first thin film pattern containing the photosensitive resin on one out of a pair of substrates 6, 13, a step to imperfectly thermoset the first thin film pattern, a step to form a second thin film pattern containing the photosensitive resin on the surface of the one substrate on which the imperfectly thermoset first thin film is formed and a step to perfectly thermoset both the imperfectly thermoset first thin film pattern and the second thin film pattern simultaneously. The method is characterized by constructing one out of a color filter layer 9 and a peripheral light shielding layer with the perfectly thermoset first thin film pattern and by constructing at least the other out of the color filter layer 9 and the peripheral light shielding slayer or a spacer 12 with the perfectly thermoset second thin film pattern.

公开(公告)号：JP2001033790A

公开(公告)日：2001-02-09

申请号：JP20490299

申请日：1999-07-19

Applicant: TOSHIBA CORP

Inventor： HADO HITOSHI ,  YOSHIDA NORIHIRO

IPC: G09F9/30 ,  G02F1/1339

Abstract: PROBLEM TO BE SOLVED: To improve display quality of a liquid crystal display device by reinforcing pressure resistance between both substrates with a post spacer, which uniformly maintains the gap between the array substrate and the counter substrate, and preventing local uneven cell thickness in a liquid crystal cell from being generated by pressure added when the liquid crystal cell is manufactured. SOLUTION: A post spacer 20 having a planar flat part on the top is formed on an array substrate by exposing a negative photoresist via a photomask 22 having about 3 μm×3 μm unexposed part 22b inside about 7 μm×15 μm exposed part 22a and subsequently developing it. Therefore the area of the post spacer 20 in contact with the counter substrate is enlarged so as to heighten pressure resistance, between the array and the counter substrates, to the pressure added in manufacturing the liquid crystal cell.

公开(公告)号：JP2000267132A

公开(公告)日：2000-09-29

申请号：JP7048299

申请日：1999-03-16

Applicant: TOSHIBA CORP

Inventor： YOSHIDA NORIHIRO

IPC: G02F1/1335 ,  G02F1/136 ,  G02F1/1368

Abstract: PROBLEM TO BE SOLVED: To provide an electrode substrate and a liquid crystal display device having high reliability and manufacture thereof. SOLUTION: A pixel electrode 151 is brought in contact with a source electrode 131 of FT 121 via contact hole 501 of a color filter CF and a contact hole 502 of a transparent insulating film 171, to be electrically connected. Gentler tapered angles can be formed for those of both contact holes without precise control of them, by forming at least a part of the contact hole 502 of the transparent insulating film 171 inside of the contact hole 501 of the color filter CF, and it is possible to prevent discontinuance between an electrode member of a pixel area and an electrode member filled in the contact hole.

公开(公告)号：JPH11264979A

公开(公告)日：1999-09-28

申请号：JP6708398

申请日：1998-03-17

Applicant: TOSHIBA CORP

Inventor： YOSHIDA NORIHIRO

IPC: G02F1/1337

Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal display device in which the visual field characteristics are improved by orientating and dividing liquid crystal molecules without performing a special orientation. SOLUTION: This liquid crystal display device provided with a liquid crystal cell constituted by arranging two substrates provided with electrodes constituting plural pixels on one main surface so that the main surfaces oppose to each other and holding a liquid crystal composition between both substrates and at least one polarizing plate 15 arranged in parallel to the liquid crystal cell and performing display by changing the orientation state of the liquid crystal composition with a voltage applied to the electrodes is characterized by providing an uneven part on each pixel of at least one of the substrates 11 and dividing the switching direction of liquid crystal molecules 16 in the pixels into >=2 directions by the strain of an electric field at the uneven part or the orientation of the liquid crystal molecules 16. One operation process can be omitted by preparing the unevenness as black stripes or the spacers in common.

公开(公告)号：JPH09105913A

公开(公告)日：1997-04-22

申请号：JP26441995

申请日：1995-10-12

Applicant: TOSHIBA CORP

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

IPC: G02F1/133

Abstract: PROBLEM TO BE SOLVED: To provide a TN type liquid crystal display element with which the respopse speed is greatly improved, the high definition display of a large capacity is embodied and the constitution is practicably usable. SOLUTION: The value of the min. driving voltage of the TN type liquid crystal display element having the liquid crystal molecule arrangement in which the nematic liquid crystal compsn. 9 has about 90 deg.C helix angle and the orientation direction of the liquid crystal molecules is nearly parallel with the surfaces of substrates 1, 2 is set at the value below the voltage value which exceeds the rising threshold voltage of the liquid crystal molecules and at which the liquid crystal molecules rise completely. More specifically, the value described above is so set that the effective retardation value of the liquid crystal cells in state of impressing the min. driving voltage on the element attains about 0.48μm. The high-fineness display of the large capacity is embodied and the response speed of the practicably usable TN type liquid crystal display element is greatly improved by this constitution.