Patents by Inventor Hideo Shibahara
Hideo Shibahara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7248328Abstract: An IPS (In-Plane-Switching) liquid crystal display panel has column spacers for spacing an active matrix substrate structure from a counter substrate structure, and liquid crystal fills the gap therebetween, wherein the ratio of total contact area between the column spacers and the active matrix substrate structure to the total area occupied by the pixels is fallen within the range from 0.050 percent to 0.150 percent so as to prevent the liquid crystal display panel from irregularity of brightness by keeping the gap constant.Type: GrantFiled: October 12, 2000Date of Patent: July 24, 2007Assignee: NEC LCD Technologies, Ltd.Inventor: Hideo Shibahara
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Publication number: 20050134784Abstract: A first substrate, a second substrate opposing to the first substrate, and liquid crystal provided in a space between the first substrate and second substrate are provided to an IPS mode liquid crystal display. A plurality of gate lines and a plurality of drain lines, thin film transistors, pixel electrodes, and common electrodes are formed on a transparent substrate in a first substrate. Each of the thin film transistors is provided in a vicinity of the intersection of the gate line and drain line. Each of the pixel electrodes is formed within a pixel region enclosed with an adjacent pair of the gate lines and an adjacent pair of the drain lines. Each of the common electrodes develops an electric field within each of the pixel regions between the pixel electrode and itself. The second substrate includes color layers provided for each of the pixel regions. The color layers are spaced apart from the gate lines and drain lines when seen on a plane.Type: ApplicationFiled: February 8, 2005Publication date: June 23, 2005Applicant: NEC LCD TECHNOLOGIES, LTDInventors: Hideo Shibahara, Kimikazu Matsumoto
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Patent number: 6870587Abstract: A first substrate, a second substrate opposing to the first substrate, and liquid crystal provided in a space between the first substrate and second substrate are provided to an IPS mode liquid crystal display. A plurality of gate lines and a plurality of drain lines, thin film transistors, pixel electrodes, and common electrodes are formed on a transparent substrate in a first substrate. Each of the thin film transistors is provided in a vicinity of the intersection of the gate line and drain line. Each of the pixel electrodes is formed within a pixel region enclosed with an adjacent pair of the gate lines and an adjacent pair of the drain lines. Each of the common electrodes develops an electric field within each of the pixel regions between the pixel electrode and itself. The second substrate includes color layers provided for each of the pixel regions. The color layers are spaced apart from the gate lines and drain lines when seen on a plane.Type: GrantFiled: May 18, 2001Date of Patent: March 22, 2005Assignee: NEC LCD Technologies, Ltd.Inventors: Hideo Shibahara, Kimikazu Matsumoto
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Patent number: 6549260Abstract: In an active matrix liquid crystal display device of a latitudinal electric field type, i.e., of an In-Plane-Switching type, a protruded spacer is formed on one of a color filter substrate and a TFT substrate, and the spacer is positioned only at a location over a common electrode wire or over a portion of a pixel electrode extended over a gate electrode wire, to thereby reduce the occurrence of a long-term afterimage phenomenon.Type: GrantFiled: March 23, 2000Date of Patent: April 15, 2003Assignee: NEC CorporationInventor: Hideo Shibahara
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Patent number: 6459468Abstract: Spacers are disposed at only positions corresponding to positions of pixels of one of the color layers, thereby widening the spacing at which the substrates are supported, the planar spacing between the spacers being widened to 5 pixels in the horizontal direction and 3 pixels in the vertical direction, thereby causing the substrates to flex so as to track a dimensional change in the gap that accompanies a temperature change in the liquid crystal between the substrates.Type: GrantFiled: August 22, 2001Date of Patent: October 1, 2002Assignee: NEC CorporationInventor: Hideo Shibahara
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Patent number: 6435570Abstract: A resin pipe joint comprising a tapered flare portion (10a) formed on a pipe (10), an inclined portion (11a) formed internally of a joint body (11), an annular member (12) having inner peripheral surface fitted on the pipe (10) and the outer peripheral surface inserted in the joint body and formed at the end with a tapered chamfered portion (12a), and a pipe clamping member (13) threadedly fitted to the joint body (11). The pipe clamping member (13) being threadedly fitted to the joint body causes the chamfered portion (12a) of the annular member to pressure-contact the flare portion (10a) of the pipe and the flare portion of the pipe to pressure-contact the inclined portion in the interior of the joint body, whereby the clamping force can be concentrated on the flare portion of the pipe, so that a high sealing capability between the pipe and the joint body is obtained.Type: GrantFiled: May 4, 2001Date of Patent: August 20, 2002Assignee: Toho Kasei Co., Ltd.Inventors: Masahide Kato, Noboru Tamaki, Hideo Shibahara
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Publication number: 20020008836Abstract: Spacers are disposed at only positions corresponding to positions of pixels of one of the color layers, thereby widening the spacing at which the substrates are supported, the planar spacing between the spacers being widened to 5 pixels in the horizontal direction and 3 pixels in the vertical direction, thereby causing the substrates to flex so as to track a dimensional change in the gap that accompanies a temperature change in the liquid crystal between the substrates.Type: ApplicationFiled: August 22, 2001Publication date: January 24, 2002Applicant: NEC CorporationInventor: Hideo Shibahara
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Patent number: 6323922Abstract: Liquid crystal display (LCD) has sub-pixel domains in each of pixels to obtain a wide viewing angle. The sub-pixel domains are formed by divided orientation alignment in which the sub-pixel domain are subjected to rubbing in different directions opposite to each other. The liquid crystal has a splay-type TN deformation structure in the first sub-pixel domain and a normal TN deformation structure in the second sub-pixel domain. The pre-tilt angles of the liquid crystal in the first domain and second domain are selected to obtain a wide viewing angle. The LCD has a shield pattern for for shielding disclination causing afterimages and storage capacitor electrodes having a function as a signal lines.Type: GrantFiled: March 31, 2000Date of Patent: November 27, 2001Assignee: NEC CorporationInventors: Masayoshi Suzuki, Ken-Ichi Takatori, Ken Sumiyoshi, Setsuo Kaneko, Teruaki Suzuki, Hideo Shibahara, Yoshihiko Hirai
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Publication number: 20010043303Abstract: A first substrate, a second substrate opposing to the first substrate, and liquid crystal provided in a space between the first substrate and second substrate are provided to an IPS mode liquid crystal display. A plurality of gate lines and a plurality of drain lines, thin film transistors, pixel electrodes, and common electrodes are formed on a transparent substrate in a first substrate. Each of the thin film transistors is provided in a vicinity of the intersection of the gate line and drain line. Each of the pixel electrodes is formed within a pixel region enclosed with an adjacent pair of the gate lines and an adjacent pair of the drain lines. Each of the common electrodes develops an electric field within each of the pixel regions between the pixel electrode and itself. The second substrate includes color layers provided for each of the pixel regions. The color layers are spaced apart from the gate lines and drain lines when seen on a plane.Type: ApplicationFiled: May 18, 2001Publication date: November 22, 2001Applicant: NEC CorporationInventors: Hideo Shibahara, Kimikazu Matsumoto
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Patent number: 6317188Abstract: Spacers are disposed at only positions corresponding to positions of pixels of one of the color layers, thereby widening the spacing at which the substrates are supported, the planar spacing between the spacers being widened to 5 pixels in the horizontal direction and 2 pixels in the vertical direction, thereby causing the substrates to flex so as to track a dimensional change in the gap that accompanies a temperature change in the liquid crystal between the substrates.Type: GrantFiled: April 19, 2000Date of Patent: November 13, 2001Assignee: NEC CorporationInventor: Hideo Shibahara
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Patent number: 6278427Abstract: Disclosed is an active matrix liquid-crystal display device, which has: an electrode-formed substrate which is composed of a drain signal electrode, a gate signal electrode, a pixel electrode and a common electrode to compose a pixel unit, and an active element; a color-filter-formed substrate where no electrode is formed and a color filter layer of red (R), green (G) and blue (B) to color light transmitted therethrough is formed; and a liquid-crystal layer sandwiched between the electrode-formed substrate and the color-filter-formed substrate; wherein the fieldthrough of respective color layers (R, G, B) of the color filter layer is equalized.Type: GrantFiled: November 30, 1998Date of Patent: August 21, 2001Assignee: NEC CorporationInventors: Kimikazu Matsumoto, Shinichi Nishida, Hideo Shibahara
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Patent number: 6147731Abstract: Scanning signal lines and video signal lines are provided in a matrix on the surface of one of a pair of glass substrates between which liquid crystal is filled. In each pixel area, thin film transistor is provided corresponding to each of cross points of the scanning signal lines and video signal lines. A reference signal line is provided across adjacent pixel areas, and reference electrodes are provided on one side of the reference signal line and extend in a comb-like form into each pixel area. A display electrode having a comb-like shape is provided such that it meshes with the reference electrodes. A light interception layer 111 having a width greater than that of display electrode and reference electrode is formed so as to overlap both of the electrode with an insulation film being interposed therebetween.Type: GrantFiled: March 17, 1999Date of Patent: November 14, 2000Assignee: NEC CorporationInventor: Hideo Shibahara
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Patent number: 6104463Abstract: There is provided an in-plane switching type liquid crystal display including (a) a first transparent substrate, (b) a pixel electrode and a common electrode both formed on an upper surface of the first transparent substrate so that they are spaced away from each other, (c) a second transparent substrate spaced away from the first transparent substrate in parallel, (d) a color filter formed on the second transparent substrate so that the color filter faces the upper surface of the first transparent substrate, (e) a liquid crystal layer sandwiched between the first and second transparent substrates, (f) a pair of polarizing plates sandwiching the first and second transparent substrates therebetween, (g) a back-light source for emitting a back-light through a lower surface of the first transparent substrate, and (h) a chromaticity controller for controlling chromaticity of the back-light in such a manner that chromaticity of the back-light is determined in accordance with chromaticity variation in display nonunType: GrantFiled: October 28, 1998Date of Patent: August 15, 2000Assignee: NEC CorporationInventor: Hideo Shibahara
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Patent number: 6081314Abstract: Liquid crystal display (LCD) has sub-pixel domains in each of pixels to obtain a wide viewing angle. The sub-pixel domains are formed by divided orientation alignment in which the sub-pixel domain are subjected to rubbing in different directions opposite to each other. The liquid crystal has a splay-type TN deformation structure in the first sub-pixel domain and a normal TN deformation structure in the second sub-pixel domain. The pre-tilt angles of the liquid crystal in the first domain and second domain are selected to obtain a wide viewing angle. The LCD has a shield pattern for shielding disclination causing afterimages and storage capacitor electrodes having a function as signal lines.Type: GrantFiled: June 12, 1998Date of Patent: June 27, 2000Assignee: NEC CorporationInventors: Masayoshi Suzuki, Ken-Ichi Takatori, Ken Sumiyoshi, Setsuo Kaneko, Teruaki Suzuki, Hideo Shibahara, Yoshihiko Hirai
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Patent number: 6031592Abstract: A reflection type liquid crystal display comprising an active matrix board having active matrix elements at the intersections of signal lines formed of a transparent conducting film and scanning lines formed of a metal, a counter electrode board having a reflector layer thereon, and a liquid crystal sealed between the active matrix board and the counter electrode board which are bonded so that the film-bearing surfaces thereof face each other, wherein the reflector layer is not formed in those parts of the counter electrode board which correspond to the signal lines formed of the transparent conducting film and disposed on the active matrix board.Type: GrantFiled: August 18, 1997Date of Patent: February 29, 2000Assignee: NEC CorporationInventor: Hideo Shibahara
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Patent number: 5875009Abstract: There is herein disclosed a sequential staggered type thin film transistor in a liquid crystal display comprising a glass substrate, and a gate line, a drain line, a pixel electrode and the sequential staggered type thin film transistor formed on the glass substrate, wherein the sequential staggered type thin film transistor has a structure in which an amorphous silicon layer, a gate insulating film and a gate electrode are laminated in turn on a source electrode and a drain electrode, and the width of an outgoing line connecting the source electrode of the thin film transistor to the pixel electrode is smaller than that of the source electrode.Type: GrantFiled: August 18, 1997Date of Patent: February 23, 1999Assignee: NEC CorporationInventor: Hideo Shibahara
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Patent number: 5781262Abstract: Liquid crystal display (LCD) has sub-pixel domains within each pixel to obtain a wide viewing angle. The sub-pixel domains are formed by divided orientation alignment in which the sub-pixel domain are subjected to rubbing in different directions opposite to each other. The liquid crystal has a splay-type TN deformation structure in the first sub-pixel domain and a normal TN deformation structure in the second sub-pixel domain. The pre-tilt angles of the liquid crystal in the first domain and second domain are selected to obtain a wide viewing angle. The LCD has a shield pattern for for shielding disclination causing afterimages and storage capacitor electrodes having a function as a signal lines.Type: GrantFiled: April 19, 1995Date of Patent: July 14, 1998Assignee: NEC CorporationInventors: Masayoshi Suzuki, Ken-Ichi Takatori, Ken Sumiyoshi, Setsuo Kaneko, Teruaki Suzuki, Hideo Shibahara, Yoshihiko Hirai
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Patent number: 5739886Abstract: A liquid crystal display and its producing method which prevents induction of electrons in a back channel part of a TFT by a positive voltage applied to an opposite electrode formed on a color filter substrate so as to reduce a leakage current in off of the transistor. A TFT substrate and the color film substrate are bonded together via a liquid crystal interposed therebetween. On the TFT substrate, a pixel electrode and the TFT including a gate electrode, a gate insulating film, an a-Si film, an n+ a-Si film, a drain electrode and a source electrode are formed. On the color filter substrate, a color filter and the opposite electrode are formed and an opening is further formed in a part facing to the TFT in the opposite electrode.Type: GrantFiled: April 3, 1997Date of Patent: April 14, 1998Assignee: NEC CorporationInventor: Hideo Shibahara
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Patent number: 5726727Abstract: In a liquid crystal display device including first and second substrate members, a layer of a liquid crystal material between the first and the second substrate members, an active switching element formed on the first substrate member, a pixel electrode connected to the active switching element and which has first and second portions, a primary signal line connected to the pixel electrode, a secondary signal line adjacent to the primary signal line with the pixel electrode interposed therebetween, a scanning line connected to the pixel electrode, the first portion of the pixel electrode is nearer to the primary signal line than to the secondary signal line while the second portion of the pixel electrode is nearer to the secondary signal line than to the primary signal line.Type: GrantFiled: April 1, 1996Date of Patent: March 10, 1998Assignee: NEC CorporationInventors: Hideo Shibahara, Susumu Ohi, Muneo Maruyama, Michiaki Sakamoto
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Patent number: 5526012Abstract: In a method for driving an active matrix liquid crystal display panel, a selection signal composed of a scan signal superimposed with a modulation signal is sequentially supplied to the scan signal lines one by one, so as to turn on the thin film transistors connected to the scan signal line applied with the selection signal so that a video signal is applied from each of the video signal lines through the associated turned-on thin film transistor to the corresponding pixel electrode and stored in the corresponding storage capacitor, whereby an image is displayed. The selection signal is configured to assume a first potential which is a high voltage, a second potential which is lower than the first potential, and a third potential which is lower than the second potential.Type: GrantFiled: March 23, 1994Date of Patent: June 11, 1996Assignee: NEC CorporationInventor: Hideo Shibahara