公开(公告)号：HK1058241A1

公开(公告)日：2004-05-07

申请号：HK04100938

申请日：2004-02-12

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYASHITA TAKASHI

IPC: G02F20060101 ,  G02F1/136 ,  G02F1/13357 ,  G02F1/1339 ,  G02F1/1343 ,  G02F1/1362 ,  G02F1/1368 ,  G09F20060101 ,  G09G20060101 ,  H01L21/336 ,  H01L29/786

Abstract: A field sequential liquid crystal display apparatus includes columnar spacers disposed between a pair of substrates to determine a thickness of a liquid crystal layer between the substrates, and spacer support portions formed on portions opposite to the columnar spacers. A driving device supplies a voltage corresponding to image data of one color corresponding to one of a plurality of colors between pixel electrodes and common electrode of the liquid crystal display device, thereby controlling a light transmission through the respective pixel regions, and allowing a light source to generate the light of the color of the image data and to emit the lights to the pixel regions.

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：SG46342A1

公开(公告)日：1998-02-20

申请号：SG1996003216

申请日：1992-05-04

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYASHITA TAKASHI ,  MIYASAWA YOSHINAGA

IPC: G02F1/1335 ,  G02F1/13363 ,  G02F1/139 ,  G02F1/133

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：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：JP2011059525A

公开(公告)日：2011-03-24

申请号：JP2009210929

申请日：2009-09-11

Applicant: Casio Computer Co Ltd ,  カシオ計算機株式会社

Inventor： MIYASHITA TAKASHI

IPC: G09G3/34 ,  G02F1/167 ,  G02F1/17 ,  G09G3/20

Abstract: PROBLEM TO BE SOLVED: To improve quality of display of an electrophoretic display element due to the aggregation of charging particles.
SOLUTION: A method of driving an electrophoretic display element includes pre-pulse operation in which a positive pulse and a negative pulse are alternately applied to a pixel electrode with common voltage as reference; a write-in operation in which voltage is applied to a pixel electrode to make the electrophoretic display element display colors; and a post-pulse operation in which a positive pulse and a negative pulse are applied alternately to a pixel electrode, with a common voltage as reference after finishing write-in operation. According to the pre-pulse operation, a force is applied to charging particles so as to perform reciprocating motion, aggregated charging particles are released. Also, needless weak charging particles around the common electrode can be eliminated by post-pulse operation. Consequently, the electrophoretic display device can prevent reduction in the display quality caused by the existence of charged microparticles of different colors.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了提高由于充电颗粒的聚集引起的电泳显示元件的显示质量。 解决方案：驱动电泳显示元件的方法包括预脉冲操作，其中正脉冲和负脉冲交替施加到具有公共电压的像素电极作为参考; 对像素电极施加电压以使电泳显示元件显示颜色的写入操作; 并且在完成写入操作之后，以公共电压为基准，在像素电极上交替施加正脉冲和负脉冲的后脉冲操作。 根据预脉冲操作，对充电颗粒施加力以进行往复运动，聚集的充电颗粒被释放。 此外，可以通过后脉冲操作来消除公共电极周围的不必要的弱充电颗粒。 因此，电泳显示装置可以防止由于不同颜色的带电微粒的存在而导致的显示质量的降低。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2000187244A

公开(公告)日：2000-07-04

申请号：JP36408998

申请日：1998-12-22

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYASHITA TAKASHI

IPC: G09F9/30 ,  G02F1/1345 ,  G02F1/136 ,  G02F1/1368

Abstract: PROBLEM TO BE SOLVED: To provide a two-way type liquid crystal display device, capable of obtaining a display having a satisfactory quality, in which abnormal displays due to disclination generated by tranverse electric fields to be generated among gate lines and pixel electrodes of the liquid crystal display element are not conspicuous, even when compensating for a picture luminance by emitting an illuminating light from a light illuminating means arranged at the rear of a liquid crystal display element. SOLUTION: In this device, compensation capacitance electrodes 32 provided on the inside surface of the rear-side substrate 22 of a liquid crystal display element 20 are formed in such shapes, that disclination generation areas due to tranverse electric fields generated among gate lines 30 and pixel electrodes 23 are covered, including areas where disclination lines D' are to be produced and an illumination light which is made incident on the disclination generation areas is interrupted by these compensation capacitance electrodes 32.

公开(公告)号：JP2000019561A

公开(公告)日：2000-01-21

申请号：JP19159298

申请日：1998-07-07

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYASHITA TAKASHI ,  TOYOSHIMA TAKESHI

IPC: G02F1/1335 ,  G02F1/13357 ,  G02F1/136 ,  G02F1/1368 ,  G09F9/35

Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal display device of a two-way type capable of displaying color images with a sufficiently bright screen even at the time of a reflection type display utilizing external light and improving image quality by eliminating the abnormal display near data lines. SOLUTION: The liquid crystal display device of the two-way type arranged with an illumination means, which emits illumination light to the rear of a liquid crystal display element and reflects the incident external light from the front of the liquid crystal display element, is provided with plural pixel electrodes 4, plural TFTs 5, gate lines 11 and the data lines 12 on the inside surface of the rear side substrate 3 of the liquid crystal display element 1. The inside surface of the front side substrate 2 is provided with counter electrodes 19, color filters 16R, 16G, 16B of red, green and blue and light shielding films 17 corresponding to the data lines 12. The portions between pixel regions A and light shielding films 17 among the inter-pixel regions D along the data lines 12 are formed as colorless light exit regions (d).

公开(公告)号：JPH11295762A

公开(公告)日：1999-10-29

申请号：JP10504798

申请日：1998-04-15

Applicant: CASIO COMPUTER CO LTD

Inventor： MIYASHITA TAKASHI ,  TOYOSHIMA TAKESHI

IPC: G02F1/1335 ,  G02F1/13357 ,  G02F1/136 ,  G02F1/1368

Abstract: PROBLEM TO BE SOLVED: To display a color picture on a screen with sufficient brightness in the case of a reflection type display utilizing external light, and to display a color picture with sufficient contrast as well as sufficient brightness on a screen in the case of a transmission type display utilizing illuminating light from a lighting means. SOLUTION: In a two-way liquid crystal display device in which a lighting means making illuminating light exit behind a liquid crystal display element and also reflecting external light made incident from the front is arranged, the liquid crystal element 1 is provided with picture element electrodes 3, thin film transistors(TFT) 5, gate lines 11 and data lines 12, and compensating capacitor electrodes 13 on an inner surface of a back side substrate 3, and color filters 17R, 17G, 17B an a counter electrode 20. At the same time, the compensating capacitor electrodes 13 are formed in a form having an extension part 13b facing a region between adjoining picture element electrodes, and spacing 18 corresponding to the extension parts 13b of the compensating capacitor electrodes are formed between the color filters 17R, 17G, 17B.