公开(公告)号：DE69328051T2

公开(公告)日：2000-07-13

申请号：DE69328051

申请日：1993-06-17

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYASHITA TAKASHI ,  MIYAZAWA YOSHINAGA ,  KIKUCHI ZENTA

IPC: G02F1/13363 ,  G02F1/139 ,  G02F1/1335

Abstract: A polarizer (2) is arranged on the incident side of a TN type liquid crystal cell (1) in which the arrangement of liquid crystal molecules is twist-aligned through substantially 90 DEG in a direction from one substrate (8) to the opposite substrate (11) and the value of a product DELTA nc.dc of a refractive index anisotropy DELTA nc and a gap dc is set within a range of 300 to 600 nm, and an analyzer (3) is arranged on the exit side of the liquid crystal cell. A twist-aligned retardation plate (4), in which the arrangement of polymer molecules is twist-aligned through 90 DEG in a direction opposite to the twist direction of the twist orientation of the liquid crystal molecules and the value of DELTA n.d ranges between 100 and 600 nm, is arranged between the liquid crystal cell and the analyzer.

公开(公告)号：DE69231455D1

公开(公告)日：2000-10-26

申请号：DE69231455

申请日：1992-05-04

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYASHITA TAKASHI ,  MIYAZAWA YOSHINAGA

IPC: G02F1/1335 ,  G02F1/13363 ,  G02F1/139

Abstract: In an STN type liquid crystal display device, two retardation plates (112, 113) are located one on each side of an STN liquid crystal cell (101). A twist angle m0 of the liquid crystal material (109) is set to fall within the range of 200 DEG to 240 DEG , and the DELTA n.d value of the liquid crystal is set to fall within the range of 700 nm to 900 nm (measurement wavelength: 589 nm). With respect to the direction of aligning treatment of an incident-side substrate (104), the light-transmitting axis of a polarizer (110) is inclined at an angle falling within the range of 140 DEG to 180 DEG , the light-transmitting axis of an analyzer (111) is inclined at an angle falling within the range of (270 DEG -¦ phi 0¦/2) +/- 10 DEG , the phase delay axis of the first retardation plate (112) is inclined at an angle falling within the range of (180 DEG -¦ phi 0¦/2) to (180 DEG - ¦ phi 0¦/2) + 30 DEG , and the phase delay axis of the second retardation plate (113) is inclined at an angle falling within the range of (180 DEG -¦ phi 0¦/2) to (180 DEG -¦ phi 0¦/2) - 30 DEG . The DELTA n.d value of each of the first and second retardation plates (112, 113) is preferably set to be 1/2 (i.e., 2 in 1/2 represents the number of retardation plates) a value obtained by multiplying the DELTA n.d value of the liquid crystal with 0.80 to 0.95.

公开(公告)号：DE69231455T2

公开(公告)日：2001-01-18

申请号：DE69231455

申请日：1992-05-04

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYASHITA TAKASHI ,  MIYAZAWA YOSHINAGA

IPC: G02F1/1335 ,  G02F1/13363 ,  G02F1/139

Abstract: In an STN type liquid crystal display device, two retardation plates (112, 113) are located one on each side of an STN liquid crystal cell (101). A twist angle m0 of the liquid crystal material (109) is set to fall within the range of 200 DEG to 240 DEG , and the DELTA n.d value of the liquid crystal is set to fall within the range of 700 nm to 900 nm (measurement wavelength: 589 nm). With respect to the direction of aligning treatment of an incident-side substrate (104), the light-transmitting axis of a polarizer (110) is inclined at an angle falling within the range of 140 DEG to 180 DEG , the light-transmitting axis of an analyzer (111) is inclined at an angle falling within the range of (270 DEG -¦ phi 0¦/2) +/- 10 DEG , the phase delay axis of the first retardation plate (112) is inclined at an angle falling within the range of (180 DEG -¦ phi 0¦/2) to (180 DEG - ¦ phi 0¦/2) + 30 DEG , and the phase delay axis of the second retardation plate (113) is inclined at an angle falling within the range of (180 DEG -¦ phi 0¦/2) to (180 DEG -¦ phi 0¦/2) - 30 DEG . The DELTA n.d value of each of the first and second retardation plates (112, 113) is preferably set to be 1/2 (i.e., 2 in 1/2 represents the number of retardation plates) a value obtained by multiplying the DELTA n.d value of the liquid crystal with 0.80 to 0.95.

公开(公告)号：DE69328051D1

公开(公告)日：2000-04-20

申请号：DE69328051

申请日：1993-06-17

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYASHITA TAKASHI ,  MIYAZAWA YOSHINAGA ,  KIKUCHI ZENTA

IPC: G02F1/13363 ,  G02F1/139 ,  G02F1/1335

Abstract: A polarizer (2) is arranged on the incident side of a TN type liquid crystal cell (1) in which the arrangement of liquid crystal molecules is twist-aligned through substantially 90 DEG in a direction from one substrate (8) to the opposite substrate (11) and the value of a product DELTA nc.dc of a refractive index anisotropy DELTA nc and a gap dc is set within a range of 300 to 600 nm, and an analyzer (3) is arranged on the exit side of the liquid crystal cell. A twist-aligned retardation plate (4), in which the arrangement of polymer molecules is twist-aligned through 90 DEG in a direction opposite to the twist direction of the twist orientation of the liquid crystal molecules and the value of DELTA n.d ranges between 100 and 600 nm, is arranged between the liquid crystal cell and the analyzer.

公开(公告)号：JPH09230387A

公开(公告)日：1997-09-05

申请号：JP2309497

申请日：1997-01-23

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYAZAWA YOSHINAGA

IPC: G02F1/1337 ,  G02F1/1343 ,  G02F1/136 ,  G02F1/1362 ,  G02F1/1368

Abstract: PROBLEM TO BE SOLVED: To enlarge an opening ratio by providing an auxiliary capacity electrode on a first substrate, and arranging it along one side of scanning lines of the side large in leakage of light due to disclination so as to have the area overlapping with the side part of a pixel electrode and the area positioning at the outside of the side part. SOLUTION: An auxiliary capacity electrode 35 comprises a common straight line part 35a provided in parallel with a scanning line 31 in a position corresponding to a upper side part of a pixel electrode 34, a left side drawer part 35b drawn out from the common straight line part 35a along the left side part of the pixel electrode 34, and a right side drawer part 35c drawn out from the common straight line part 35a along the right side part of the pixel electrode 34. The common straight line part 35a is arranged at the inside of the upper side of the pixel electrode 34, and wholly overlapped with the upper side part of the pixel electrode 34. Also, the auxiliary capacity electrode 35 is arranged so as to have the area overlapping with the side part of the pixel electrode 34 and the area positioned at the outside of the side part of the pixel electrode 34, and the auxiliary capacity electrode 35 is not provided in a scanning line 31 side.

公开(公告)号：JPH08184834A

公开(公告)日：1996-07-16

申请号：JP33762194

申请日：1994-12-28

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYAZAWA YOSHINAGA

IPC: G02F1/1337

Abstract: PURPOSE: To provide a liquid crystal display element capable of displaying high-quality images at a wide visual field angle. CONSTITUTION: The respective pixels of the liquid crystal display element are bisected or divided to a stripe form by using a pixel division method. The respective partial pixels are subjected to orientation treatments in such a manner that the twist directions of liquid crystal molecules are the same in the respective partial pixels, that the average directors in the plane direction of the liquid crystal molecules in an initial orientation state are substantially parallel with boundary lines of the partial pixels and that the pretilt angle attains

公开(公告)号：JPH06167706A

公开(公告)日：1994-06-14

申请号：JP32896992

申请日：1992-11-16

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYAZAWA YOSHINAGA

IPC: G02F1/1335

Abstract: PURPOSE:To improve the inversion of brightness by visual angles at the time of displaying medium graduations and to lessen the color change by visual angles by providing a pair of polarizing plates disposed to hold a liquid crystal cell therebetween on the outer side of the cell and a specific perpendicular axis phase plate disposed between a pair of the polarizing plates and specifying the value of DELTAnd of the liquid crystal cell. CONSTITUTION:The value of the product DELTAnd of the gap d and refractive index anisotropy DELTAn of the liquid crystal cell 1 is set in a 300 to 600nm range. The polarizer 2 is so disposed that its transmission axes 2a intersects nearly orthogonally with the orientation treatment direction 7a on the incident side of the liquid crystal cell 1. The analyzer 3 is so disposed that its transmission axes 3a intersects nearly orthogonally with the transmission axis 2a of the polarizer 2. The perpendicular axis phase plate 4 has the refractive indices in three directions; a stretching direction refractive index nx, intra-surface orthogonal direction refractive index ny and thickness direction refractive index nz. The refractive indices in these three directions satisfy the relation nx=ny=nz. Then, the difference in the phase difference of the light transmitted perpendicularly in the liquid crystal cell and the light transmitted diagonally therein is compensated.

公开(公告)号：JP2003108535A

公开(公告)日：2003-04-11

申请号：JP2001297473

申请日：2001-09-27

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYAZAWA YOSHINAGA

IPC: G06F15/02 ,  G06F17/13

Abstract: PROBLEM TO BE SOLVED: To provide a technology capable of easily making a numerical analysis of a high order differential equation in an electronic computer having the differential operation function without compelling excess labor to a user. SOLUTION: In the differential operation function, a CPU 2 accepts input of the high order differential equation in an analytical mode of the high order differential equation, stores the high order differential equation inputted at this time in an input buffer area 3a, converts the high order differential equation into a prescribed simultaneous differential equation according to a degree of the high order differential equation when detecting indication for converting the high order differential equation stored in the input buffer area 3a into the simultaneous differential equation, and determines a numerical solution of the converted simultaneous differential equation.

公开(公告)号：JP2002318789A

公开(公告)日：2002-10-31

申请号：JP2001121453

申请日：2001-04-19

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYAZAWA YOSHINAGA

IPC: G06F15/02 ,  G06F3/00 ,  G06F3/048 ,  G06F17/12 ,  G06F17/13

Abstract: PROBLEM TO BE SOLVED: To provide technology which can avoid a case wherein an electronic computer equipped with a differential arithmetic function and a composite function recognizes a mathematical expression that a user inputs as a differential equation as a mathematical expression showing a composite function. SOLUTION: Through the differential arithmetic function, a CPU 11 when detecting a place where neither arithmetical operation symbols nor other calculation symbols are inserted between a polynomial or monomial parenthesized in a differential equation stored in an input buffer area 121 and the variable symbol Y right before the parenthesized polynomial or monomial regards the variable symbol as a variable to be multiplied by the polynomial or monomial and finds the numerical resolution of the differential equation.

公开(公告)号：JPH08136916A

公开(公告)日：1996-05-31

申请号：JP29601194

申请日：1994-11-07

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYAZAWA YOSHINAGA

IPC: G02F1/1335 ,  G02B1/11 ,  G02B1/115 ,  G02B1/14 ,  G02F1/133

Abstract: PURPOSE: To widen a visual field angle and to display images with a high contrast by providing the above element with polarizing plates arranged on at least either side of a liquid crystal cell and plural thin films which are laminated on the outside surfaces of these polarizing plates and vary in refractive index. CONSTITUTION: This liquid crystal display element is composed of a pair of transparent substrates 11, 12, the liquid crystal cell 19 which is composed of liquid crystals 13 enclosed between these substrate substrates 11 and 12, a pair of the polarizing plates 14, 15 which are arranged across the liquid crystal cell 19 and low reflection films (antireflection films) 16, 17 which are arranged on the outside surfaces of the polarizing plates 14, 15. TFTs 21 as active elements and pixel electrodes 22 are arranged in a matrix form on the one transparent substrate 11 and the oriented film 23 is arranged thereon. These low reflection films 16, 17 are formed by alternately laminating plural TiO2 films and plural SiO2 films. Since the TiO2 and the SiO2 vary in the refractive index, the refraction and reflection of light arise at the boundaries between the TiO2 films and the SiO2 films and the reflection of incident light is lessened.