Patents by Inventor Koichi Fukuda
Koichi Fukuda 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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Publication number: 20090231508Abstract: A display device includes a display panel having opposed first and second substrates with the second substrate being arranged closer to a viewer, an upper polarizer which is arranged closer to the viewer than the second substrate, and a resin film which is arranged closer to the viewer than the upper polarizer and is in contact with the upper polarizer. An outer periphery of the upper polarizer is arranged inside an outer periphery of the second substrate, and an outer periphery of the resin film is arranged outside the outer periphery of the upper polarizer as viewed from a front surface of the display panel. A cushion material is in contact with the second substrate, and the resin film is interposed between the second substrate and the resin film.Type: ApplicationFiled: May 21, 2009Publication date: September 17, 2009Inventors: Tsutomu Sato, Masayuki Yanagihara, Koichi Fukuda
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Patent number: 7590004Abstract: A nonvolatile semiconductor memory includes a memory cell array including horizontally aligned memory cell columns, each including vertically arranged memory cell transistors and select transistors selecting the memory cell transistors; first cell well lines connecting well regions in which the memory cell columns are formed; second cell well lines arranged in an interconnect layer above the first cell well lines and connecting the first cell well lines to one another electrically; and a cell source line connecting source terminals of the select transistors in each memory cell column.Type: GrantFiled: February 2, 2006Date of Patent: September 15, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Takumi Abe, Koichi Fukuda, Hiroshi Maejima
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Patent number: 7586361Abstract: This disclosure concerns a semiconductor device that includes a booster portion including first switches and first capacitors; and a voltage converter comprising boosting stages each of which includes a second capacitor whose one end is connected to a first voltage source via a second switch and whose other end is connected to a reference voltage via a third switch, the second capacitor being charged on the basis of a voltage difference between the first voltage source and the reference voltage, and comprising fourth switches each of which is provided between two of the boosting stages to control the number of the second capacitors connected in series between a second power source and the other ends of the first capacitors according to the voltages of the first and second voltage sources, the voltage converter outputting clock signals with phases opposed to each other to adjacent ones of the first capacitors.Type: GrantFiled: June 12, 2007Date of Patent: September 8, 2009Assignee: Kabushiki Kaisha ToshibaInventor: Koichi Fukuda
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Publication number: 20090213306Abstract: A liquid crystal display includes a liquid crystal display panel having a first substrate, a second substrate disposed on an observer side with respect to the first substrate and opposed to the first substrate, a liquid crystal held between the first substrate and the second substrate, an upper polarizing plate disposed on the observer side with respect to the second substrate, and a resin film disposed on the observer side with respect to the upper polarizing plate and affixed in contact with the upper polarizing plate. The resin film is higher in surface hardness than the upper polarizing plate and has a surface hardness of at least 3H in terms of surface pencil hardness. Each of the first and second substrates have a thickness of no greater than 0.5 mm, and a total thickness of the liquid crystal display panel is no greater than 2 mm.Type: ApplicationFiled: May 7, 2009Publication date: August 27, 2009Inventor: Koichi Fukuda
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Publication number: 20090194028Abstract: A plasma processing device of the type comprises an RF electrode which is made of a metal and is covered with a ceramic material at least at a portion of the metal exposed to a plasma. The RF electrode is so controlled that a discharge amount of a gas generated therefrom is in the range of 10?8 Torr·L/second to 10?6 Torr·L/second. To this end, the ceramic material is favorably made of a sintered ceramic material.Type: ApplicationFiled: February 10, 2009Publication date: August 6, 2009Inventors: Koichi FUKUDA, Donggil Kim, Tadahiro Ohmi
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Patent number: 7542105Abstract: A display device includes a display panel having opposed first and second substrates with the second substrate being arranged closer to a viewer, an upper polarizer which is arranged closer to the viewer than the second substrate, and a resin film which is arranged closer to the viewer than the upper polarizer and is in contact with the upper polarizer. An outer periphery of the upper polarizer is arranged inside an outer periphery of the second substrate, and an outer periphery of the resin film is arranged outside the outer periphery of the upper polarizer as viewed from a front surface of the display panel. A cushion material in contact with the second substrate, and the resin film is interposed between the second substrate and the resin film.Type: GrantFiled: March 21, 2007Date of Patent: June 2, 2009Assignee: Hitachi Displays, Ltd.Inventors: Tsutomu Sato, Masayuki Yanagihara, Koichi Fukuda
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Patent number: 7538487Abstract: There is provided a display device which quenches ambient light by using only an optical interference effect without additionally using an optical filter such as a color filter, and can provide good visibility out of doors in the daylight. The display device includes a plurality of organic EL elements each having a light extraction electrode, a reflective electrode, and a plurality of organic compound layers disposed between the electrodes, wherein the plurality of organic EL elements include at least organic EL elements which emit a red light, a green light, and a blue light, respectively; a layer comprised of a material having anomalous dispersion is disposed at a location which is on a light extraction side with respect to the reflective electrode in each of the plurality of organic EL elements; and an ambient light reflectance of the display device shows a minimal in a region of 535 nm or more and 575 nm or less.Type: GrantFiled: September 22, 2006Date of Patent: May 26, 2009Assignee: Canon Kabushiki KaishaInventors: Toshinori Hasegawa, Hiroshi Matsuda, Masahiro Okuda, Masataka Yashima, Koichi Fukuda, Nobutaka Mizuno
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Patent number: 7532274Abstract: A liquid crystal display comprises a liquid crystal display panel, the liquid crystal display panel comprising a first substrate; a second substrate disposed on an observer side with respect to the first substrate and opposed to the first substrate; a liquid crystal held between the first substrate and the second substrate; an upper polarizing plate disposed on the observer side with respect to the second substrate; and a resin film disposed on the observer side with respect to the upper polarizing plate and affixed in contact with the upper polarizing plate, the resin film being higher in surface hardness than the upper polarizing plate. Both reduction in thickness of the liquid crystal display panel and ensuring of a sufficient strength are attained.Type: GrantFiled: December 26, 2006Date of Patent: May 12, 2009Assignee: Hitachi Displays, Ltd.Inventor: Koichi Fukuda
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Patent number: 7532520Abstract: A semiconductor memory device includes a memory cell array, a voltage generating circuit, a memory circuit which stores a reference pulse number of an erase voltage of the memory cell array and a parameter, and a control circuit which controls, when a pulse number of the erase voltage exceeds the reference pulse number of the erase voltage, the voltage generating circuit in a manner to increase at least an erase verify level in accordance with the parameter.Type: GrantFiled: July 16, 2007Date of Patent: May 12, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Kosuke Yanagidaira, Koichi Fukuda, Takahiko Hara
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Publication number: 20090103028Abstract: The present invention provides a liquid crystal display device. An optical film having negative uniaxial double refractive index ellipsoids is arranged below a semi-transmitting liquid crystal display cell and, thereafter, a ?/4 phase difference plate, a ?/2 phase difference plate and a polarizer are arranged. The orientation axis direction of the optical film having negative uniaxial double refractive index ellipsoids is substantially equal to the direction which is rotated by 90° in the clockwise direction from a resultant vector of the orientation axis direction of the upper orientation film and the orientation axis direction of the lower orientation film of the liquid crystal display cell. Further, phase lagging axis of the upper and lower ?/4 phase difference plate is set substantially equal to the orientation axis direction of the optical film having negative uniaxial double refractive index ellipsoids.Type: ApplicationFiled: November 19, 2008Publication date: April 23, 2009Inventors: Koichi Fukuda, Yoshiaki Nakamura
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Publication number: 20090091686Abstract: A liquid crystal display device includes a first substrate, a second substrate arranged on a viewer side, and a liquid crystal between the first and second substrates. A light guide plate is arranged on a back surface of the first substrate, a polarization plate is arranged between the first substrate and the light guide plate, and a prism sheet is arranged between the light guide plate and the polarization plate with prisms being provided on a light guide plate side thereof. A diffusion layer is arranged between the prism sheet and the polarization plate, and a light control sheet is arranged between the diffusion layer and the polarization plate. The light control sheet, which is a ?/2 retardation plate, rotates a polarization of light emitted from the diffusion layer, is arranged in contact with the polarization plate.Type: ApplicationFiled: December 5, 2008Publication date: April 9, 2009Inventor: Koichi Fukuda
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Patent number: 7514747Abstract: A semiconductor device formed in a silicon-on-insulator substrate includes a silicon channel region located between silicon source and drain regions, and a low-carrier-concentration layer that underlies the channel region. The low-carrier-concentration layer makes contact with both the channel region and the source region. The channel region and the low-carrier-concentration layer are of the same conductive type, but the low-carrier-concentration layer is doped to have a lower carrier concentration than the channel region. The low-carrier-concentration layer eliminates the floating substrate effect, because carriers that would otherwise accumulate in the channel region can escape through the low-carrier-concentration layer into the source region.Type: GrantFiled: May 18, 2007Date of Patent: April 7, 2009Assignee: Oki Semiconductor Co., Ltd.Inventor: Koichi Fukuda
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Patent number: 7515473Abstract: A semiconductor memory device includes: a memory cell array; a sense amplifier circuit for reading and writing data of the memory cell array page by page; a verify-judge circuit configured to judge write or erase completion based on the verify-read data held in the sense amplifier circuit; and data latches disposed for the respective columns in the memory cell array to be attached to the verify-judge circuit, into which column separation data are written to serve for excluding the corresponding columns from a verifying object, wherein the column separation data are automatically set in the data latches in an initial set-up mode at a power-on time so that at least a part of inaccessible columns for users are excluded from the verifying object.Type: GrantFiled: September 27, 2007Date of Patent: April 7, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Koichi Fukuda, Midori Morooka, Hiroyuki Dohmae
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Publication number: 20090051627Abstract: Sticking of a Pixel is suppressed to improve the life of a display panel. In an emission display apparatus with a display panel in which a plurality of pixels each having at least one subpixel are disposed. A first display method of emitting light with only a pixel P(i,j) serving as an emission center and a second display method of allocating luminance of the pixel P(i,j) serving as an emission center to nearby pixels surrounding the pixel are combined in a controllable manner. A high-resolution mode with a high ratio of the first display method and a long-life mode with a high ratio of the second display method are switched therebetween depending on a spatial change or time change of image input data, an emission time, a degradation rate, a temperature, an emission luminance, and a display time.Type: ApplicationFiled: August 4, 2008Publication date: February 26, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Junichi Ihata, Koichi Fukuda
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Patent number: 7489377Abstract: It is an object of the present invention to provide a liquid crystal display device with a back-side prism type backlight in order to prevent a stain in an image displayed and attain high brightness. A liquid crystal display device comprises: a first substrate; a second substrate arranged on the viewer side compared with the first substrate; a liquid crystal held between the first substrate and the second substrate; a light guide plate arranged on the back surface of the first substrate; a polarization plate arranged between the first substrate and the light guide plate; a prism sheet arranged between the light guide plate and the polarization plate and having prisms provided on the light guide plate side; a diffusion layer arranged between the prism sheet and the polarization plate; and a light control sheet arranged between the diffusion layer and the polarization plate. The light control sheet rotates the polarization of the light emitted from the diffusion layer.Type: GrantFiled: November 29, 2006Date of Patent: February 10, 2009Assignee: Hitachi Displays, Ltd.Inventor: Koichi Fukuda
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Publication number: 20090033852Abstract: A liquid crystal display device includes: a first substrate; a second substrate which is placed nearer to a viewer than the first substrate, and which faces a viewer side of the first substrate; a liquid crystal sandwiched between the first substrate and the second substrate; an upper polarization plate which is placed nearer to the viewer than the second substrate, and which faces a viewer side of the second substrate; and a transparent resin plate which is placed nearer to the viewer than the upper polarization plate, and which is attached to a viewer side of the upper polarization plate with one of an adhesive material and a bonding material, the transparent resin plate includes a transparent oxide film on a face that faces the upper polarization plate, and the transparent resin plate is in close contact with the adhesive material or the bonding material through the transparent oxide film.Type: ApplicationFiled: August 1, 2008Publication date: February 5, 2009Inventors: Koichi Fukuda, Tetsuya Oshima, Satoru Kawasaki, Tsutomu Sato, Kouji Hayakawa
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Patent number: 7486559Abstract: 2 or more sets of initial setup data specifying different operation conditions are stored in a memory cell array comprising electrically-rewritable non-volatile memory cells arranged therein. A control circuit reads a set of initial setup data out of the 2 or more sets of initial setup data via an sense amplifier circuit based on the area information. The initial setup data is transferred to an initial setup data latch and stored therein.Type: GrantFiled: April 26, 2007Date of Patent: February 3, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Midori Morooka, Koichi Fukuda
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Publication number: 20090021151Abstract: Provided is a display apparatus, in which: among a red light emitting device, a green light emitting device, and a blue light emitting device, one or two of the organic light emitting devices include a metal translucent layer on a side closer to a second electrode with respect to a emission layer and a second reflection surface includes a surface of the metal translucent layer on a side of the emission layer; and the rest of the organic light emitting devices include a low-refractive index layer having a lower refractive index than the second electrode on the side closer to the second electrode with respect to the emission layer and the second reflection surface includes a surface of the low-refractive index layer on the side of the emission layer.Type: ApplicationFiled: June 23, 2008Publication date: January 22, 2009Applicant: CANON KABUSHIKI KAISHAInventor: Koichi Fukuda
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Patent number: 7471361Abstract: The present invention provides a liquid crystal display device. An optical film having negative uniaxial double refractive index ellipsoids is arranged below a semi-transmitting liquid crystal display cell and, thereafter, a ?/4 phase difference plate, a ?/2 phase difference plate and a polarizer are arranged. The orientation axis direction of the optical film having negative uniaxial double refractive index ellipsoids is substantially equal to the direction which is rotated by 90° in the clockwise direction from a resultant vector of the orientation axis direction of the upper orientation film and the orientation axis direction of the lower orientation film of the liquid crystal display cell. Further, phase lagging axis of the upper and lower ?/4 phase difference plate is set substantially equal to the orientation axis direction of the optical film having negative uniaxial double refractive index ellipsoids.Type: GrantFiled: March 21, 2007Date of Patent: December 30, 2008Assignee: Hitachi Displays, Ltd.Inventors: Koichi Fukuda, Yoshiaki Nakamura
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Publication number: 20080303419Abstract: Provided is a light-emitting apparatus which can improve the light extraction efficiency without adversely influencing a functional layer of a light-emitting device and which includes a substrate; a light-emitting device formed on the substrate, the light-emitting device including: a first electrode formed on the substrate; an insulating member covering a periphery of the first electrode; and a functional layer formed on an exposed portion of the first electrode and including an emission layer; and a second electrode formed on the functional layer and the insulating member, in which a periodic structure is formed on a surface of the insulating member opposite to a substrate side, and an optical waveguide is formed between a bottom portion of the periodic structure and the first electrode or between the bottom portion of the periodic structure and the substrate.Type: ApplicationFiled: February 8, 2008Publication date: December 11, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Koichi Fukuda