公开(公告)号：EP1361475A4

公开(公告)日：2005-07-20

申请号：EP01273682

申请日：2001-12-25

Applicant: IBM

Inventor： TAKENAKA ATSUSHI ,  IKEZAKI MITSURU ,  KUSAFUKA KAORU

IPC: G09G3/36

CPC classification number: G09G3/3648 ,  G09G3/3614 ,  G09G2300/0434 ,  G09G2320/0204 ,  G09G2320/0219 ,  G09G2320/0247 ,  G09G2330/026

Abstract: A liquid crystal display device requiring no flicker adjustment after manufactured. The liquid crystal display device is of IPS drive type. Just after the liquid crystal display device is turned on, there is an intial voltage component between a pixel electrode and a common electrode. The initial DC voltage component is considered to cause flicker. When the DC voltage component is automatically lowered to an allowable value in a predetermined time after the power is turned on, flicker adjustment is not required by changing the potential applied to the electrodes in the pixels. For this, it is necessary to lower the initial DC compositions sufficiently and to make a construction in which charge can migrate at a high speed in the liquid crystal panel. A punching-through compensation drive method is adopted as one technique of lowering the initial DC components. The construction of opposed substrates are made preferrable to facilitate the migration of charge therein.

公开(公告)号：JP2002107758A

公开(公告)日：2002-04-10

申请号：JP2000287410

申请日：2000-09-21

Applicant: IBM

Inventor： TAKASUGI CHIKATOMO ,  IKEZAKI MITSURU

IPC: G02F1/136 ,  G02F1/1362 ,  G02F1/1368 ,  G09F9/00 ,  G09F9/30

Abstract: PROBLEM TO BE SOLVED: To obtain a method for manufacturing a liquid crystal display device by which changes in the luminance in the sub-pixel part which comprises double exposure part(s) can be prevented. SOLUTION: In the patterning process of a TFT array substrate for a liquid crystal display device, the substrate is subjected to division exposure. In the exposure process of a resist, the substrate is divided into a plurality of fractions and exposed by using a stepper. The part where two division exposure regions are overlapped includes a part subjected to double exposure by considering the exposure error. The double exposure part is established into a non-linear form in the sub-pixel part. By establishing like this, the double exposure part is not overlapped with a storage capacitance or signal lines. Thus, changes in the capacitance in the storage capacitance between the signal lines and pixel electrodes can be prevented and irregular display or changes in the luminance can be prevented.

公开(公告)号：DE69220726T2

公开(公告)日：1998-01-15

申请号：DE69220726

申请日：1992-04-24

Applicant: IBM

Inventor： IKEZAKI MITSURU ,  SUZUKI SHUNJI ,  TAKANO HIDEO

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

公开(公告)号：JP2002098982A

公开(公告)日：2002-04-05

申请号：JP2000270143

申请日：2000-09-06

Applicant: IBM

Inventor： SHIMIZU EIJU ,  KUSAFUKA KAORU ,  IKEZAKI MITSURU ,  TERUKINA ASAO

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

Abstract: PROBLEM TO BE SOLVED: To provide a display panel and a display device, capable of enhancing opening ratio of a pixel area. SOLUTION: In each pixel area of a liquid crystal panel 100 of a transverse electric field system, a pixel electrode 18 is made into a two-layer structure consisting of a lower part pixel electrode 21, which is positioned on the same layer as that of a signal line 15 and a upper part pixel electrode 22, which is positioned on the same layer as that of a common electrode 17, and the electrode part of the lower part pixel electrode 21 is set closer to the signal line 15 than to the upper part pixel electrode 22. Moreover, the signal line 15, a gate line 16 and the common electrode 17 are arranged overlapped.

公开(公告)号：JP2000122596A

公开(公告)日：2000-04-28

申请号：JP29424598

申请日：1998-10-15

Applicant: IBM

Inventor： TAKENAKA ATSUSHI ,  IKEZAKI MITSURU

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: PROBLEM TO BE SOLVED: To prevent the occurrence of an unclear display image and to improve the quality of an animation by allowing a writing means to write in black color for other pixel line during an interval in which an image is at least written in one pixel line. SOLUTION: An image, which is displayed to a user, is written into all pixels of one pixel line during one interval of one frame interval by gating both a black color signal portion 16 and an image signal portion 17 of a data signal. Then, during a next frame interval, only the portion 16 is gated prior to writing an image in one pixel line and black color for eliminating the persistence of vision is written into all pixels of the line. Thus, two kind gate/pulse DI has a wide width to gate both portions 16 and 17.

公开(公告)号：JPH07225394A

公开(公告)日：1995-08-22

申请号：JP1437194

申请日：1994-02-08

Applicant: IBM

Inventor： KODATE MANABU ,  KIMURA SHINICHI ,  YAMANAKA SHUHO ,  IKEZAKI MITSURU

IPC: G02F1/1333 ,  G02F1/1345 ,  G02F1/136 ,  G02F1/1362 ,  G02F1/1368 ,  H01L29/78 ,  H01L29/786

Abstract: PURPOSE: To provide the liquid crystal display device which is improved the light shielding capability in a frame area and preventing capability against electrostatic trouble without increasing manufacture processes as to the improvement of the frame area of the liquid crystal display panel of the liquid crystal display device. CONSTITUTION: A light shield layer 12 is formed in the frame area 1 on a TFT array substrate 3. The edge part of the light shield layer 12 has an overlap area 14 which overlaps with respective edge parts of data lines 10 as metallic layers and the surface of the TFT array substrate 3 by a specific overlap quantity (d) when viewed vertically. An insulating layer 16 is formed on the light shield layer 12 and TFT array substrate 3. On the insulating layer 16, a semiconductor layer 18 is formed. The data lines 10 are wired on the semiconductor layer 18.

公开(公告)号：JPH04355790A

公开(公告)日：1992-12-09

申请号：JP13866891

申请日：1991-05-15

Applicant: IBM

Inventor： IKEZAKI MITSURU ,  SUZUKI SHUNJI ,  TAKANO HIDEO

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: PURPOSE: To provide a liquid crystal display device which simultaneously realizes a wide angle of field, a high contrast ratio, and a satisfactory gradation. CONSTITUTION: With respect to the liquid crystal display device in the normally white mode where plural different application voltages corresponding to plural different gradation levels respectively are set to display the gradation, a curve (V-T) curve) expressing a relation or the light transmittance to the lowest application voltage is shifted in the monotonously falling direction of the T-V curve. SInce the V-T curve of the lowest application voltage is shifted in the monotonously falling direction of the V-T curve, the reversion of luminance or gradation is prevented.

公开(公告)号：GB2342754B

公开(公告)日：2003-02-19

申请号：GB9923849

申请日：1999-10-11

Applicant: IBM

Inventor： TAKENAKA ATSUSHI ,  IKEZAKI MITSURU

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: To prevent the display image from becoming unclear due to an overlap of the afterimage of the display image of the preceding frame period with the display image of the current frame period so that the image quality of the motion picture may be improved, a display apparatus includes a display surface having a plurality of pixel lines and a write circuit adapted to sequentially write an image into each of said plurality of pixel lines. The write circuit writes, during a time period for writing said image into at least one pixel line, a black color into another pixel line. The another pixel line is separated from the at least one pixel line by a predetermined distance. The write circuit writes the black color into a plurality of pixel lines separated from the at least one gate line by the predetermined distance.

公开(公告)号：CA2065981A1

公开(公告)日：1992-11-16

申请号：CA2065981

申请日：1992-04-14

Applicant: IBM

Inventor： IKEZAKI MITSURU ,  SUZUKI SHUNJI ,  TAKANO HIDEO

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: JA9-91-007 METHOD FOR DRIVING LCD AND APPARATUS FOR DRIVING LCD AND LCD APPARATUS To provide a liquid crystal display apparatus that simultaneously satisfies both good contrast ratios and good gradation at large viewing angles. A liquid crystal display apparatus in normally-white mode in which gray scale displaying is obtained by providing different applied voltages corresponding to different gray scale levels, respectively, is characterized in that, in a curve showing the relation between an applied voltage and light transmittance ( V-T curve ) the lowest applied voltage is set so as to be shifted in the direction of a monotonously decreasing area of the V-T curve. By shifting the lowest applied voltage in the V-T curve in the direction of a monotonously decreasing area of the V-T curve, brightness or gradation is prevented from being inverted. A liquid crystal display apparatus in normally-white mode in which gray scale displaying is obtained by providing different applied voltages corresponding to different gray scale levels, respectively, characterized in that in a curve showing the relation between the an applied voltage and light transmittance (thereafter called V-T curve) the lowest applied voltage is set so as to be shifted in the direction of a monotonously decreasing area of the V-T curve. By shifting the lowest applied voltage in the V-T curve in the direction of a monotonously decreasing area of the V-T curve, brightness or gradation is prevented from being inverted.

公开(公告)号：CA2436451A1

公开(公告)日：2002-08-15

申请号：CA2436451

申请日：2001-12-25

Applicant: IBM

Inventor： IKEZAKI MITSURU ,  KUSAFUKA KAORU ,  TAKENAKA ATSUSHI

IPC: G09G3/36 ,  G02F1/133 ,  G02F1/1368 ,  G09G3/20

Abstract: A liquid crystal display device requiring no flicker adjustment after manufactured. The liquid crystal display device is of IPS drive type. Just after the liquid crystal display device is turned on, there is an intial voltage component between a pixel electrode and a common electrode. The initial DC voltage component is considered to cause flicker. When the DC voltage component is automatically lowered to an allowable value in a predetermined time after the power is turned on, flicker adjustment is not required by changing the potential applied to the electrodes in the pixels. For this, it is necessary to lower the initial DC compositions sufficiently and to make a construction in which charge can migrate at a high speed in th e liquid crystal panel. A punching-through compensation drive method is adopte d as one technique of lowering the initial DC components. The construction of opposed substrates are made preferrable to facilitate the migration of charg e therein.