Patents Assigned to Fujitsu Display Technologies
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Patent number: 6825892Abstract: When radiating light onto a liquid crystal composition containing a photosensitive material, the alignment of liquid crystal molecules is adjusted by applying a voltage to the liquid crystal composition layer, to achieve substantially orderly alignment of the liquid crystal molecules, or the alignment of the liquid crystal molecules is made uniform by adjusting the structure of the liquid crystal display device, or any display defect is driven out of the display area. When radiating light to the liquid crystal composition containing the photosensitive material, the alignment of the liquid crystal molecules can be adjusted so as to achieve substantially orderly alignment of the liquid crystal molecules, and the liquid crystal display device can thus be driven stably.Type: GrantFiled: March 11, 2004Date of Patent: November 30, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Hiroyasu Inoue, Kenichi Nagaoka, Yuji Nakahata, Yoji Taniguchi
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Patent number: 6819384Abstract: AC voltage of rectangular wave is applied between a pixel electrode 25A and a common electrode 23A, and the amplitude Vac of the AC voltage component and the DC voltage component Vdc thereof are changed to measure the range of optimal DC component variation &Dgr;Vdc and determine a structure or material of a liquid crystal display device so as to lower &Dgr;Vdc less than a given value, wherein &Dgr;Vdc=|Vdcb−Vdcw|, Vdcb is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying black (2V), and Vdcw is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying white (7 V). Thickness of an insulating layer 26A on the pixel electrode 25A and on the common electrode 23A are the same. Electrode crossover portions are made to be in axial symmetry. The top surface of each stripe electrode of a pixel electrode has convex shape in cross section.Type: GrantFiled: August 9, 2001Date of Patent: November 16, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Yohei Nakanishi, Hidefumi Yoshida, Takashi Sasabayashi, Yasutoshi Tasaka
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Patent number: 6819392Abstract: The present invention relates to a method for manufacturing a liquid crystal display utilizing the dispense-injection method, and it is an object of the invention to provide a method for manufacturing a liquid crystal display which allows an optimum quantity of liquid crystals to be dispensed on each substrate. At a dispense-injection step, in the case of a two-shot process for fabricating two liquid crystal display panels from a single glass substrate, the heights of support posts on two CF substrates having columnar spacers formed thereon are measured at a plurality of points (e.g., five locations) on each of the surfaces using a laser displacement gauge and an average value of the height is obtained. The support post height of the columnar spacers is thus measured in advance to control the quantity of dispensed liquid crystals based on the measured value.Type: GrantFiled: March 19, 2001Date of Patent: November 16, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Satoshi Murata, Hiroyuki Sugimura, Norimichi Nakayama, Hiroyasu Inoue
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Patent number: 6812975Abstract: The present invention relates to an active matrix type display providing a thin film transistor (TFT) as a switching device and which can obtain a large storage capacitor without thinning an insulating film between electrodes or expanding an electrode to a pixel area. The active matrix type display is structured to have a plurality of gate wirings formed on a glass substrate, a plurality of data wirings formed on the glass substrate substantially orthogonal to the gate wirings, the TFT decided by the gate wirings and data wirings and formed in a plurality of pixel areas arranged in a matrix shape, a pixel electrode formed inside the pixel area and connected to the TFT, and a plurality of storage capacitor electrodes layers formed a plurality of storage capacitors between the glass substrate and pixel electrode via a plurality of insulating films.Type: GrantFiled: April 18, 2000Date of Patent: November 2, 2004Assignee: Fujitsu Display Technologies CorporationInventor: Yoshio Nagahiro
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Patent number: 6808302Abstract: The present invention provides a backlight device that has a heat-generating light source, such as a fluorescent tube. This backlight device includes; fluorescent tubes that emit light when power is supplied to the fluorescent tube electrodes; and a light guide plate that guides the light emitted from the fluorescent tubes to a liquid crystal panel. In this backlight device, heat release members for releasing the heat from the fluorescent tube electrodes are provided at the corners of the light guide plate that face the fluorescent tube electrodes of the fluorescent tubes. With these heat release members, the light guide plate is prevented from melting.Type: GrantFiled: December 2, 2002Date of Patent: October 26, 2004Assignee: Fujitsu Display Technologies CorporationInventor: Hirofumi Miyamoto
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Patent number: 6806862Abstract: A liquid crystal display device including a display part having pixels arranged in a matrix formation; signal lines and scan lines connected to the pixels; a data driver which supplies display signals to the signal lines; and a reset circuit which resets the potentials of the signal lines to a predetermined potential with a given period. In one embodiment, the reset circuit includes a first reset circuit connected to the signal lines, and a second reset circuit connected to an output part of the driver.Type: GrantFiled: April 8, 1999Date of Patent: October 19, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Hongyong Zhang, Hirokazu Miwa, Michiya Oura, Hiroshi Murakami, Kazuhiro Takahara
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Patent number: 6798488Abstract: A liquid crystal display device has a liquid crystal inserted between first and second substrates and surrounded by a peripheral seal. The liquid crystal is dripped onto the first substrate in an area defined by the seal of the first substrate. The first substrate and the second substrate are joined or bonded together under pressure in a vacuum chamber. The chamber is then exposed to the atmosphere while keeping the first substrate and the second substrate under pressure. The pressure is then released and thereafter light is irradiated onto the peripheral seal. The vacuum chamber includes upper and lower surface plates to support the substrates. The surface plate includes an electrostatic chuck and a vacuum attraction passage provided in the chuck.Type: GrantFiled: September 24, 2002Date of Patent: September 28, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Satoshi Murata, Hiroyuki Sugimura, Norimichi Nakayama
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Publication number: 20040183985Abstract: A liquid crystal display apparatus that can detect a signal in an input signal wire and perform tests by measuring the resistance of the wire even without any signal input substrate is disclosed. The liquid crystal display apparatus includes an almost quadrilateral liquid crystal panel having a liquid crystal display part and a plurality of first drive IC substrates. The first drive IC substrates are aligned along an edge of the liquid crystal panel and connected to the liquid crystal panel. Each first drive IC substrate has a first drive IC and further includes a through wire to connect between distinct terminals of a plurality of terminals aligned along an edge thereof, and a test pad is formed on a portion of the through wire.Type: ApplicationFiled: March 16, 2004Publication date: September 23, 2004Applicant: Fujitsu Display Technologies CorporationInventor: Yoshihisa Taguchi
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Publication number: 20040180480Abstract: A stagger type TFT substrate and a fabrication method therefor in which the number of exposure processes is reduced. A resist pattern is formed in an area on the TFT substrate where a drain bus-line (DB) is to be formed and an area on the TFT substrate where a TFT is to be formed by the use of a half tone mask. Etching is performed with this resist pattern as a mask to form the DB and a channel area for the TFT. In addition, a resist pattern is formed in an area where a gate bus-line (GB) is to be formed and an area where a pixel electrode is to be formed by the use of a half tone mask. Etching is performed with this resist pattern as a mask to form the GB and the pixel electrode. The DB and the channel are formed by one half tone mask and the GB and the pixel electrode are formed by another half tone mask. As a result, the number of exposure processes necessary for fabricating a stagger type TFT substrate can be reduced.Type: ApplicationFiled: March 8, 2004Publication date: September 16, 2004Applicant: Fujitsu Display Technologies CorporationInventor: Yoshio Dejima
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Publication number: 20040178411Abstract: The invention relates to a substrate for a display, a method of manufacturing the same, and a display having the same and provides a substrate for a display which can be manufactured through simple steps with high reliability, a method of manufacturing the same, and a display having the same. The substrate is configured to have a gate bus line, an OC layer formed on the gate bus line, a pixel electrode formed on the OC layer at each pixel region, and a gate terminal for electrically connecting an external circuit and the gate bus line.Type: ApplicationFiled: February 24, 2004Publication date: September 16, 2004Applicant: Fujitsu Display Technologies CorporationInventors: Katsunori Misaki, Shiro Hirota
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Patent number: 6791646Abstract: A liquid crystal display panel comprises first and second substrates and a liquid crystal inserted therebetween. The first substrate has active elements, picture electrodes and a first alignment film, and the second substrate has a common electrode and a second alignment film. The first and second alignment films are treated such that the liquid crystal molecules adjacent to the alignment films are oriented in predetermined directions (by rubbing), and at least one of the first and second alignment films is at least partly treated such that its surface condition is changed in order to restrain movement of the liquid crystal molecules (by UV irradiation).Type: GrantFiled: October 27, 1997Date of Patent: September 14, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Hiroyasu Inoue, Keiji Imoto
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Patent number: 6791650Abstract: A vertically aligned liquid crystal display device includes a site in a liquid crystal layer in which liquid crystal molecules are tilted in a predetermined direction in a non-activated state of the liquid crystal display device.Type: GrantFiled: March 31, 1999Date of Patent: September 14, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Seiji Tanuma, Yohei Nakanishi, Takatoshi Mayama
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Patent number: 6791518Abstract: A timing controller for a liquid-crystal display panel includes a data enable signal detection circuit which detects a data enable signal applied to the timing controller, and a timing generating circuit which controls a display timing of image data to be displayed on the liquid-crystal display panel on the basis of the data enable signal detected by the data enable signal detection circuit.Type: GrantFiled: April 16, 1998Date of Patent: September 14, 2004Assignee: Fujitsu Display Technologies CorporationInventor: Yasutake Furukoshi
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Publication number: 20040174471Abstract: When radiating light onto a liquid crystal composition containing a photosensitive material, the alignment of liquid crystal molecules is adjusted by applying a voltage to the liquid crystal composition layer, to achieve substantially orderly alignment of the liquid crystal molecules, or the alignment of the liquid crystal molecules is made uniform by adjusting the structure of the liquid crystal display device, or any display defect is driven out of the display area. When radiating light to the liquid crystal composition containing the photosensitive material, the alignment of the liquid crystal molecules can be adjusted so as to achieve substantially orderly alignment of the liquid crystal molecules, and the liquid crystal display device can thus be driven stably.Type: ApplicationFiled: March 11, 2004Publication date: September 9, 2004Applicant: Fujitsu Display Technologies CorporationInventors: Yohei Nakanishi, Kazutaka Hanaoka, Yuichi Inoue, Masakazu Shibasaki
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Publication number: 20040169790Abstract: When radiating light onto a liquid crystal composition containing a photosensitive material, the alignment of liquid crystal molecules is adjusted by applying a voltage to the liquid crystal composition layer, to achieve substantially orderly alignment of the liquid crystal molecules, or the alignment of the liquid crystal molecules is made uniform by adjusting the structure of the liquid crystal display device, or any display defect is driven out of the display area. When radiating light to the liquid crystal composition containing the photosensitive material, the alignment of the liquid crystal molecules can be adjusted so as to achieve substantially orderly alignment of the liquid crystal molecules, and the liquid crystal display device can thus be driven stably.Type: ApplicationFiled: March 11, 2004Publication date: September 2, 2004Applicant: Fujitsu Display Technologies CorporationInventors: Hiroyasu Inoue, Kenichi Nagaoka, Yuji Nakahata, Yoji Taniguchi
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Patent number: 6781656Abstract: The liquid crystal display device comprising a pair of substrates with alignment layers formed thereon, and a liquid crystal filled between the substrates. Each pixel has pixel display portions CA, CB and non-display portions DA, EA, DB, EB. The pixel display portions are treated for realizing alignment in a different manner from the non-display portions and the alignment of the pixel display portions is controlled by the alignment of the non-display portions. Moreover, the alignment treatment is executed by the irradiation with ultraviolet rays in an inclined direction.Type: GrantFiled: December 12, 2002Date of Patent: August 24, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Hidefumi Yoshida, Tsutomu Seino, Yasutoshi Tasaka
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Patent number: 6781665Abstract: The invention relates to a liquid crystal display in which a polymeric component included in a liquid crystal layer is polymerized while adjusting a voltage applied to the liquid crystal layer to regulate the direction of alignment of liquid crystal molecules during polymerization and a method of manufacturing the same. The invention provides a liquid crystal display in which image sticking is mitigated and a method of manufacturing the same. In a method of manufacturing a liquid crystal display in which a liquid crystal composition including a polymeric component that is optically or thermally polymerized is sealed between substrates and in which the polymeric component is polymerized while applying a voltage to the liquid crystal composition to regulate the direction of alignment of liquid crystal molecules during driving, a configuration is employed such that a polymerization initiator in the liquid crystal composition has a concentration x that satisfies 0≦x≦0.Type: GrantFiled: January 30, 2003Date of Patent: August 24, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Yohei Nakanishi, Hiroyasu Inoue, Yuji Nakahata, Kengo Kanii, Kazutaka Hanaoka, Masakazu Shibasaki, Yuichi Inoue
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Patent number: 6778229Abstract: When radiating light onto a liquid crystal composition containing a photosensitive material, the alignment of liquid crystal molecules is adjusted by applying a voltage to the liquid crystal composition layer, to achieve substantially orderly alignment of the liquid crystal molecules, or the alignment of the liquid crystal molecules is made uniform by adjusting the structure of the liquid crystal display device, or any display defect is driven out of the display area. When radiating light to the liquid crystal composition containing the photosensitive material, the alignment of the liquid crystal molecules can be adjusted so as to achieve substantially orderly alignment of the liquid crystal molecules, and the liquid crystal display device can thus be driven stably.Type: GrantFiled: October 2, 2002Date of Patent: August 17, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Hiroyasu Inoue, Kenichi Nagaoka, Yuji Nakahata, Yoji Taniguchi
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Patent number: 6767754Abstract: A TFT matrix-type liquid crystal display device is used in laptop personal computers and wall televisions. On a transparent insulating substrate there are formed gate bus lines for commonly connecting the gates of thin film transistors, drain bus lines for commonly connecting the drains of the thin film transistors, and outside terminals opposed respectively to the ends of the gate bus lines and the drain bus lines. Gate connection lines for commonly connecting the gate bus lines, and drain connection lines for commonly connecting the drain bus lines, are formed on the transparent insulating substrate in regions inner of the outside terminals. The thin film transistor matrix device can be fabricate without occurrence of short circuit defects, with little characteristic change, and with high yields.Type: GrantFiled: February 21, 2002Date of Patent: July 27, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Hidaki Takizawa, Shougo Hayashi, Takeshi Kinjo, Makoto Tachibanaki, Kenji Okamoto
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Publication number: 20040141117Abstract: A reflection-type liquid crystal display device includes a first substrate, a second substrate facing the first substrate and carrying projections and depressions, a reflective electrode on the second substrate so as to cover the projections and depressions and in electrical contact with a switching device provided on the second substrate via a contact hole, and a negative liquid crystal layer between the first and second substrates, wherein the contact hole is disposed centrally to the reflection electrode and a structure controlling alignment of liquid crystal molecules in the liquid crystal layer is disposed so as to overlap the contact hole viewed in a direction perpendicular to the second substrate.Type: ApplicationFiled: January 9, 2004Publication date: July 22, 2004Applicant: Fujitsu Display Technologies CorporationInventors: Kunihiro Tashiro, Norio Sugiura, Katsufumi Ohmuro