Patents Assigned to Advanced Display Inc.
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Publication number: 20020044239Abstract: An active matrix-type liquid crystal display device is provided with a black matrix which prevents light leakage between pixels, wherein the apertures in the black matrix in panel peripheral regions are made smaller than the apertures in the black matrix in the panel center region. Consequently, the occurrence of light leakage due to alignment anomalies arising from the horizontal-direction electric field between the signal lines and scanning lines and the pixel electrodes can be suppressed, and display quality can be enhanced without detracting from manufacturing efficiency or yield and without reducing the brightness of the liquid crystal display device, so that this invention affords excellent advantages.Type: ApplicationFiled: July 20, 2001Publication date: April 18, 2002Applicant: Advanced Display Inc.Inventor: Hitoshi Koyama
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Publication number: 20020041492Abstract: A planar light source device has a linear light source, a light guide plate for guiding light from the linear light source through the whole plane thereof, a lamp reflector for reflecting light from the linear light source in the direction of the light guide plate, an optical sheet positioned on the light output face of the light guide plate, and a frame member for regulating the positions of the linear light source, the light guide plate, the lamp reflector and the optical sheet. The position of the optical sheet in the planar direction is regulated by the side face portion of a protruding section formed in a portion of the frame member. Consequently, it is possible to regulate a position of an optical sheet by means of a simple structure.Type: ApplicationFiled: August 10, 2001Publication date: April 11, 2002Applicant: Advanced Display Inc.Inventor: Kouji Ichikawa
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Patent number: 6362031Abstract: A TFT of the present invention includes an insulating substrate, a first conductive film layer which is to be a gate electrode provided on the insulating substrate, a first insulating film layer which is to be a gate insulating film layer provided on the first conductive film layer, a non-doped semiconductor layer formed on the first insulating film layer, and a second conductive film layer which is to be a source electrode formed on a source region of the semiconductor layer and a drain electrode formed on a drain region of the semiconductor, wherein a junction is formed by implanting an n-type impurity in the source region of the semiconductor layer and the drain region of the semiconductor.Type: GrantFiled: November 24, 1999Date of Patent: March 26, 2002Assignee: Advanced Display Inc.Inventors: Takehisa Yamaguchi, Akio Nakayama
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Publication number: 20020033813Abstract: The present invention is directed to a display apparatus including a correcting means for producing a current corrected data signal by using a current image data signal and a previous corrected data signal; a storage means for storing said current corrected data signal within a predetermined frame period, outputting said current corrected data signal as the previous corrected data signal in such a manner as to be delayed at most said predetermined frame period; and a display means driven by a driving signal corresponding to said current corrected data signal.Type: ApplicationFiled: September 20, 2001Publication date: March 21, 2002Applicant: ADVANCED DISPLAY INC.Inventors: Tatsuya Matsumura, Susumu Shibata
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Publication number: 20020030993Abstract: A sheet-like light source device comprising a plurality of bar-shaped light sources, a diffusing plate for diffusing light emitted from the light sources, and a reflecting plate capable of mirror reflecting the light emitted from the light sources to the diffusing plate side. The reflecting plate is provided in a position opposite to the diffusing plate with respect to the light sources. The reflecting plate has at least one convex portion formed in parallel with the light sources in a space between the two adjacent light sources. It is possible to decrease or remove shield printing which has conventionally carried out over the diffusing plate, thereby enabling manufacture of a back light having a high efficiency.Type: ApplicationFiled: June 22, 2001Publication date: March 14, 2002Applicant: ADVANCED DISPLAY INC.Inventor: Atsushi Itoh
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Publication number: 20020030652Abstract: A liquid crystal display device is provided with a image data inputting means for inputting image data and a image data memory for storing image data comprising a number of bits which is fewer than the number of bits in the image data input to the image data inputting means, on the basis of this image data. In addition, a liquid crystal display device is provided with corrected data generating means for generating corrected data by correcting the current image data input to the image data inputting means, on the basis of previous image data stored in the image data memory. Consequently, the liquid crystal display device enables the capacity of image data memory for storing previous image data to be reduced, thereby yielding a merit in that cost savings can be achieved.Type: ApplicationFiled: August 31, 2001Publication date: March 14, 2002Applicant: Advanced Display Inc.Inventors: Susumu Shibata, Shiro Miyake
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Patent number: 6356329Abstract: The present invention discloses a liquid crystal display apparatus including (1) a liquid crystal panel including an electrodes substrate provided with pixel electrodes and counter electrodes, a counter substrate which opposes the electrodes substrate, and a liquid crystal layer containing therein liquid crystal molecules which are driven by an electric field that is generated in a substantially parallel manner with respect to a surface of the electrodes substrate when voltage is applied on the pixel electrodes and counter electrodes; and (2) a driving circuit for supplying predetermined electric signals to the pixel electrodes and the counter electrodes, wherein inclining directions of liquid crystal molecules which are closest to the electrodes substrate and those of liquid crystal molecules which are closest to the counter substrate are identical, and aligning directions of liquid crystal molecules which are closest to the electrodes substrate and those of liquid crystal molecules which are closest to theType: GrantFiled: January 27, 1999Date of Patent: March 12, 2002Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display Inc.Inventors: Akira Tamatani, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Yasuhiro Morii, Masayuki Fujii, Yasuo Fujita
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Publication number: 20020018176Abstract: The present invention is a thin film transistor array substrate includes: an insulating substrate; a first metallic pattern formed on said insulting substrate; an insulating film provided on said first metallic pattern; a semiconductor pattern provided on said insulating film; and a second metallic pattern provided on said semiconductor pattern; wherein said second metallic pattern is surrounded by said semiconductor pattern.Type: ApplicationFiled: March 14, 2001Publication date: February 14, 2002Applicant: ADVANCED DISPLAY INC.Inventors: Kazuhiro Kobayashi, Nobuhiro Nakamura, Kazunori Inoue, Takuji Yoshida, Ken Nakashima, Yuichi Masutani, Hironori Aoki
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Patent number: 6343868Abstract: A sheet-like light source device of side-light type comprising a light-conducting plate, at least one rod-like light source disposed proximate to a light-incident surface, a tubular reflecting member covering portions other than a surface facing the light-conducting plate of the rod-like light source, and a planar reflecting member disposed proximate to a position facing a rear surface of the light-conducting plate. An end portion of the planar reflecting member is projecting out from an end portion of the light-conducting plate within the tubular reflecting member, and the projecting end portion of the planar reflecting member is bent in a parting direction from the rod-like light source. It is possible to prevent degradations in display qualities owing to anomalous emission without degrading the brightness thereof.Type: GrantFiled: September 6, 2000Date of Patent: February 5, 2002Assignee: Advanced Display Inc.Inventor: Atsushi Itoh
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Patent number: 6339456Abstract: The present invention discloses a liquid crystal display apparatus comprising: a first pixel including a gate electrode extended forming a predetermined angle &thgr; to the scanning line; a drain electrode provided having a portion to be superposed on the gate electrode in a first predetermined region on the signal line side in the gate electrode; a source electrode provided in a second predetermined region opposite to the drain electrode in the gate electrode; a second pixel including a gate electrode extended forming the predetermined angle &thgr; to the scanning line; a source electrode provided having a portion to be superposed on the gate electrode in a third predetermined region on the scanning line side in the gate electrode; and a drain electrode provided in a fourth predetermined region opposite to the source in the gate electrode.Type: GrantFiled: March 17, 1999Date of Patent: January 15, 2002Assignee: Advanced Display Inc.Inventor: Shingo Nagano
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Patent number: 6335779Abstract: A method of manufacturing an in-plane switching liquid crystal display apparatus which includes forming on a TFT array substrate, a plurality of scanning signal lines, a plurality of image signal lines each crossing the scanning signal lines, thin film transistors at each intersection of the scanning signal lines and image signal lines, liquid crystal driving electrodes opposing the liquid crystal driving electrodes, and common signal lines connected to the common electrodes. Further, the method includes opposing a counter substrate to the TFT array substrate, interposing a plurality of spacers in a gap between the TFT array substrate and the counter substrate, and interposing a sealing agent in the gap between the TFT array substrate and the counter substrate so as to adhere the TFT array substrate and the counter substrate at peripheral portions thereof.Type: GrantFiled: September 19, 2000Date of Patent: January 1, 2002Assignees: Mistubishi Denki Kaubshiki Kaisha, Advanced Display Inc.Inventors: Yasuhiro Morii, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Masayuki Fujii, Yasuo Fujita
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Publication number: 20010052959Abstract: A liquid crystal display device comprising a sealing material provided on a periphery of a substrate, projections formed by etching a film formed on the subtrate, and another substrate opposite the substrate being remote therefrom by a gap and being supported by the projections. An area occupying rate of the projections portions with respect to a region enclosed by the sealing material is not less than 0.0001 and not more than 0.003. It is possible to obtain a liquid crystal display device free of display blurs at the time of using the same in a high temperature condition and with which no bubbles are generated when using the same in a low temperature condition by setting the area occupying ratio for the columnar spacers to be optimal value.Type: ApplicationFiled: March 12, 2001Publication date: December 20, 2001Applicant: ADVANCED DISPLAY INC.Inventors: Akira Tamatani, Yasunori Niwano
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Publication number: 20010048412Abstract: The present invention is directed to a method of driving a liquid crystal display, where said liquid crystal display includes steps of: setting said central electric potential of said source signals and said central electric potential of said common signals, in such a manner as to compensate a reduction of said electric potential of a pixel electrode induced by said gate signals in a case of the gradation where said amplitude of said source signals is large, and setting said central electric potential of said source signals, in such a manner that said central electric potential of said source signals is higher than said central electric potential of said source signals compensating said reduction of the electric potential induced by said gate signals in case of the gradation where said amplitude of said source signals is small.Type: ApplicationFiled: May 3, 2001Publication date: December 6, 2001Applicant: ADVANCED DISPLAY INC.Inventors: Kunifumi Nakanishi, Tomoya Teragaki
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Publication number: 20010038430Abstract: A liquid crystal display of the present invention includes: a pair of substrates, at least one of which is transparent; a liquid crystal layer being interposed between said pair of substrates; electrodes for applying an electric field to liquid crystals molecules in said liquid crystal layer; active switching elements connected with said electrodes; an alignment film being formed on a surface of at least one of said pair of substrates, said surface being contacted with said liquid crystal layer; and an optical device for controlling a transmission of light in cooperation with alignment of said liquid crystal molecules in each pixel, said means being located on at least one said pair of substrates; wherein an aligning direction of each liquid crystal molecule in each pixel is ranged between −2 degree to +2 degrees with respect to an average aligning direction &thgr;1c of said liquid crystal layer.Type: ApplicationFiled: April 5, 2001Publication date: November 8, 2001Applicant: ADVANCED DISPLAY INC.Inventors: Masaya Mizunuma, Akira Tamatani, Ken Nakashima
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Patent number: 6313890Abstract: The present invention is directed to a liquid crystal display including: an active matrix liquid crystal display element; and a surface light source; the liquid crystal display element including a liquid crystal substance sandwiched between an electrode substrate and an counter substrate via alignment films; the electrode substrate having a surface formed with a matrix of pixel portion having switching elements surrounded by a plurality of image signal lines and scanning signal lines; wherein a transmittance distribution of the liquid crystal display element reduces a brightness distribution inconsistency in the surface light source; or more specifically; wherein Xmax is a maximum brightness value in a display region of the surface light source, Xmin is a minimum brightness value thereof, Zmax is a maximum brightness value of the liquid crystal display, and Zmin is a minimum brightness value thereof; and wherein the expression of Xmax/Xmin>Zmax/Zmin is satisfied.Type: GrantFiled: July 12, 2000Date of Patent: November 6, 2001Assignee: Advanced Display Inc.Inventor: Akira Tamatani
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Publication number: 20010035711Abstract: A display device comprising a display portion of planar type, electronic parts for driving the display portion through external signals, and mechanical parts for fixing the display portion and the electronic parts to specified positions. The mechanical parts comprise at least thin metallic parts and wherein nuts are either mounted to the metallic parts through caulking or metallic parts are directly threaded. By mounting various parts to the display device through caulked nuts or through directly performing threading of metal, it is possible to remarkably improve operability than compared to the prior art and to mount a large number of parts to the display device.Type: ApplicationFiled: April 4, 2001Publication date: November 1, 2001Applicant: ADVANCED DISPLAY INC.Inventor: Atsushi Itoh
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Patent number: 6310669Abstract: A TFT array substrate including: an insulating substrate, a gate electrode, a gate electrode line, an insulating film, a semiconductor layer, a contact layer, a source electrode, a drain electrode, a source electrode line, an interlayer insulating film, a pixel electrode, and a connecting line which is made of a same material that of the pixel electrode and connects electrically between the gate electrode line and the source electrode line through a second contact hole provided in the insulating film and a third contact hole provided in the interlayer insulating film.Type: GrantFiled: May 21, 1998Date of Patent: October 30, 2001Assignees: Mitsubishi Denki Kabushiki Kaisha, Advanced Display IncInventors: Kazuhiro Kobayashi, Nobuhiro Nakamura, Yukio Endoh
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Publication number: 20010030719Abstract: The liquid crystal display of the present invention comprising: a gate electrode line formed on an insulating substrate; a source electrode line including a source electrode intersected with said gate electrode line via an insulating film, a thin film transistor located in a vicinity of a portion in which said gate electrode line is intersected with said source electrode line; two drain electrode lines, each including two drain electrodes in said thin film transistor, said drain electrode line being connected with a pixel electrode; wherein said thin film transistor includes said two drain electrode lines located on both sides of said source electrode; said two drain electrodes being formed at a place where each end portion of said two drain electrode lines opposed to said source electrode is superposed with said gate electrode line.Type: ApplicationFiled: April 12, 2001Publication date: October 18, 2001Applicant: ADVANCED DISPLAY INC.Inventors: Takehisa Yamaguchi, Takafumi Hashiguchi, Naoki Nakagawa, Satoshi Kohtaka
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Publication number: 20010028560Abstract: A sheet-like light source device of edge-light type comprising at least a light source, a light-conducting plate and a retention member for retaining the light-conducting plate. At least one convex portion or concave portion is provided on a lateral surface portion of the light-conducting plate other than a light-incident portion with the light-conducting plate being held in a specified positional relationship by means of the retention member formed with a concave portion or a convex portion which fits with the convex portion or concave portion of the light-conducting plate. A light-absorbing means is provided on at least a surface portion of either surface of the concave portion or convex portion of the retention member. It is possible to eliminate occurrence of abnormal emission of light and decreases in luminance so that the display quality of the display might be maintained.Type: ApplicationFiled: April 4, 2001Publication date: October 11, 2001Applicant: ADVANCED DISPLAY INC.Inventors: Shigeru Yachi, Atsushi Itoh
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Publication number: 20010029054Abstract: By using a metal thin film comprising a layer of metal and a layer obtained by adding nitrogen atoms to metal for a metal thin film which becomes a gate electrode and the like, and for a metal thin film which becomes a source electrode and a drain electrode, there is prepared electro-optic elements free from display defects caused by high contact resistance at connected portion of the pixel electrode with the above electrodes even when a low resistance line material is used.Type: ApplicationFiled: March 30, 2001Publication date: October 11, 2001Applicant: ADVANCED DISPLAY INC.Inventors: Yoichiro Maeda, Nobuhiro Nakamura, Nobuaki Ishiga, Kazunori Inoue