公开(公告)号：GB2313465B

公开(公告)日：1999-11-17

申请号：GB9709681

申请日：1997-05-14

Applicant: IBM

Inventor： KIMURA YASUHIRO ,  MATINO HARUHIRO

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

Abstract: To correct the dependency of the transmissivity/applied voltage characteristics on color, a computing circuit is provided for generating corrected gray scale data by performing an addition or subtraction of the gray scale level related to at least one color. A delay circuit delays the gray scale data for uncorrected colors to maintain synchronization between the gray scale signals of all colors.

公开(公告)号：GB2313465A

公开(公告)日：1997-11-26

申请号：GB9709681

申请日：1997-05-14

Applicant: IBM

Inventor： KIMURA YASUHIRO ,  MATINO HARUHIRO

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

Abstract: In a colour liquid crystal display grey scale data for one colour is fed to a computing circuit 32. This circuit modifies the grey scale data by addition or subtraction so that it has the same transmissivity as the other colours. The unmodified greyscale signals for the other colours are directed to a buffer 26 which delays the signals while the modified greyscale is being generated. This technique corrects for the dependency of the transmissivity/voltage characteristic on wavelength.

公开(公告)号：JPH09185037A

公开(公告)日：1997-07-15

申请号：JP33457995

申请日：1995-12-22

Applicant: IBM

Inventor： NAKAMURA HAJIME ,  KIMURA YASUHIRO ,  SUEOKA KUNIAKI ,  TAIRA YOICHI ,  UCHIDA TATSUO

IPC: G02F1/137 ,  G02F1/133 ,  G02F1/139 ,  G09G3/36

Abstract: PROBLEM TO BE SOLVED: To shift an OCB cell from a spray orientation state to a bend orientation state in a short time by applying a voltage which is higher than an electric field needed to continue bend orientation between a display electrode (pixel electrode) and a common electrode. SOLUTION: When the power source is turned on, a power-on reset signal is outputted for t1 seconds, and a gate pulse which is about 20-20V similar to an ordinary gate pulse, but has a period much wider than that in ordinary gate timing is outputted to a gate line in the t1 seconds. The gate-on time of this driving method is set long to several msec - several sec. Consequently, the bend orientation as a nucleus is formed between the gate electrode and common electrode. Further, the whole pixel shifts to the bend orientation with the electric field applied between the display electrode and common electrode. As a higher and higher voltage is applied between the display electrode and common electrode, the shift to the bend orientation is faster and faster.

公开(公告)号：JPH07181484A

公开(公告)日：1995-07-21

申请号：JP27663393

申请日：1993-11-05

Applicant: IBM

Inventor： YAMAGUCHI AKIYA ,  KURIHARA MIKIO ,  NISHI SATORU ,  KIMURA YASUHIRO

IPC: G02F1/1335 ,  F21V8/00 ,  F21V19/04 ,  G02B6/00 ,  G02F1/13357

Abstract: PURPOSE: To obtain a back light for liquid crystal display device and a liquid crystal display device where a light source can be safely and easily replaced in perpendicular from the rear side in a small space and the cost is reduced. CONSTITUTION: A lamp guard unit 26 of a back light 20 is freely detachable from a lamp hold unit 24, which is fixed to a light transmission plate 22, in the direction orthogonal to the light irradiated face of the light transmission plate 22. Consequently, it is unnecessary to replace the whole of the back light 20 when a fluorescent lamp 44 is replaced, and a user is safe because he doesn't touch the fluorescent lamp 44 difficult to handle, and further, only a small space is required for detachment ecause it is pulled out in the perpendicular direction, and thus, the fluorescent lamp 44 is safely and easily replaced in the small space.

公开(公告)号：JPH08184809A

公开(公告)日：1996-07-16

申请号：JP32315894

申请日：1994-12-26

Applicant: IBM

Inventor： KIMURA YASUHIRO ,  NISHI SATORU ,  YOSHIDA TOSHIHIKO

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

Abstract: PURPOSE: To display an image with a fixed quality on a liquid crystal display device regardless of the change of length of the period for applying a voltage of the same polarity to the liquid crystal. CONSTITUTION: The length of one period of a horizontal synchronous signal inputted from an information processing device to a LCD unit is counted, and on the basis of the length of one period and whether a gate overlap scan is performed or not, the amplitude and center of amplitude of the data voltage applied to a liquid crystal are corrected in such a manner that the amplitude of the data voltage is increased, and the correction quantity to the center of amplitude is increased as the length of the period of applying the data voltage of the same polarity to the liquid crystal is shortened. Thus, in both cases of a relatively long period and a short period, the absolute values V of the voltage between electrodes before and after TFT is OFF are equal to each other regardless of the polarity of the data voltage applied to the liquid crystal.

公开(公告)号：JP2001033810A

公开(公告)日：2001-02-09

申请号：JP19189499

申请日：1999-07-06

Applicant: IBM

Inventor： KATSU YOSHIHIRO ,  YAMASHITA HIROSHI ,  KIMURA YASUHIRO ,  TSUJI SATOSHI

IPC: G06F3/041 ,  G02F1/13 ,  G02F1/133 ,  G02F1/136 ,  G02F1/1362 ,  G02F1/1368 ,  G06F3/03 ,  G06F3/033 ,  G02F1/1365

Abstract: PROBLEM TO BE SOLVED: To provide the device and method capable of effectively performing processing on pixel areas of a display device. SOLUTION: On each pixel area 41 on a liquid crystal TFT array substrate, an ITO transparent electrode 43, a gate line 48, a data line 46, a TFT active element 45, an identification mark 50, etc., are formed. The identification mark 50 is provided on the gate line 48 by forming a silver bar code. Since the identification mark is provided in the pixel area, it is possible to surely identify the transistor to be repaired, by detecting the identification mark, for instance, in repair processing of a TFT array substrate. Moreover, in an information processor for inputting graphics and characters onto a screen by using a laser pen, it is possible to accurately specify a locus of the pen by specifying a position of the pixel area from the identification mark detected by the pen, and to recognize inputted graphics, etc., in details.

公开(公告)号：JPH11259021A

公开(公告)日：1999-09-24

申请号：JP3467498

申请日：1998-02-17

Applicant: IBM

Inventor： KURIHARA MIKIO ,  KIMURA YASUHIRO

IPC: G09F9/35 ,  G02F1/13

Abstract: PROBLEM TO BE SOLVED: To assemble a liquid crystal display panel thinned and made light in weight with an excellent waterproof property or the like by a simple process. SOLUTION: This liquid crystal display panel is composed of liquid crystal display panel member kinds composed of plural liquid crystal display panel members such as an array cell 10, optical system sheets 8, a light transmission body 6, a lamp reflector 4 and a lamp, etc., and a film 16 for laminating them. The film can be provided so as to cover the entire member kinds or can be provided with an opening. For positioning, the liquid crystal display panel members can be provided with recessed and projected parts for positioning.

公开(公告)号：JPH09319334A

公开(公告)日：1997-12-12

申请号：JP12717396

申请日：1996-05-22

Applicant: IBM

Inventor： KIMURA YASUHIRO ,  MACHINO HARUHIRO

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

Abstract: PROBLEM TO BE SOLVED: To effectively correct dependency between transmissivity and impression voltage characteristic for every color by generating a gradation corrected by adjusting a gradation concerning one wavelength and delaying outputs of gradations which are not corrected concerning other wavelengths by a time required for the generation of the corrected gradation. SOLUTION: A color to be an object for correction and colors which are not to be objects for correction are respectively defined as blue (B) and red (R), green (G). A part 20 to which gradation data concerning these R, G are inputted includes a delay circuit 24, which compensates a time when gradation data B0∼B5 concerning B are operated by an arithmetic circuit 32 and a condition judging table 33. That is, gradation data R0∼R5, G0∼G5 concerning R, G corresponding to gradation data B0∼B5 concerning B receive delays equivalent to the delay of the data of B by a delay circuit 24. As a result, a timing in which the gradation data B0∼B5 concerning B are outputted from a buffer circuit 36 to an X driver and a timing in which the gradation data R0∼R5, G0∼G5 concerning R, G are outputted from a buffer circuit 26 to the X driver become the same time.

公开(公告)号：JPH07129127A

公开(公告)日：1995-05-19

申请号：JP27642493

申请日：1993-11-05

Applicant: IBM

Inventor： KIMURA YASUHIRO ,  NISHI SATORU ,  ONODERA TAKAHIRO

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

Abstract: PURPOSE: To prevent the generation of flicker, etc., when the contrast of an image to be displayed is changed. CONSTITUTION: The amplitude of a data voltage, of which the polarity is inverted at timing synchronized with the display cycle of the image, is changed corresponding to gradation and instructed contrast and the position of 0V (center) corresponding to the amplitude of the data voltage is offset by much offset quantity according to the increase of contrast. Thus, even when the instructed contrast is comparatively high and the amplitude of the data voltage is comparatively small as shown in (A) or even when the instructed contrast is comparatively low and the amplitude of the data voltage is comparatively large as shown in (B), a change ΔV of an inter-electrode voltage caused by the influence of parasitic capacitance of a TFT in the case of turning off the TFT is corrected and after the TFT is turned off, the inter-electrode voltage is made equal in spite of the polarity of data voltage to be impressed to liquid crystal.