Patents by Inventor Akitoyo Konno

Akitoyo Konno 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).

  • Patent number: 8736043
    Abstract: A power semiconductor device is provided in which reliability can be improved when the parallel number of semiconductor devices increases. When a bonding face on collector electrode is on an upper side, and a bonding face on emitter electrode is on a lower side, a collector electrode joint region as a joint region between a collector trace and a collector electrode on a chip mounted substrate and an emitter electrode joint region as a joint region between an emitter trace and an emitter electrode are located at a same position in an up-and-down direction and are adjacent in a right-and-left direction at an interval of 2 mm or more and 4 mm or less.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: May 27, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Akitoyo Konno, Katsunori Azuma, Takashi Ando
  • Publication number: 20130285039
    Abstract: In order to improve an external quantum efficiency of an organic light-emitting element, a first light extraction layer is formed over the surface of a second substrate on the side where the second substrate is present, a second light extraction layer is formed over the surface of the second substrate on the other side, the first and second light extraction layers contain fine particles and a binder, the average particle diameter of the fine particles contained in the first and second light extraction layers are 0.05 ?m or more and 2 ?m or less and 1 ?m or more and 10 ?m or less, respectively, and an optical length L1 between the emission point of the light emitting layer and a first electrode satisfies (2m?155/180)?0/4/cos 35°?L1?(2m?155/180)?0/4/cos 50°, where ?0 is a center emission wavelength of the light emitting layer and m is an integer of 1 or more.
    Type: Application
    Filed: January 23, 2012
    Publication date: October 31, 2013
    Applicant: Hitachi ,Ltd.
    Inventors: Shingo Ishihara, Hiroshi Sasaki, Akitoyo Konno, Shunichiro Nobuki, Hiroki Kaneko
  • Publication number: 20130154473
    Abstract: An adhesive sheet 1 including a binder 3 and adhesive particles 2 mixed in the binder 3 in which the adhesive particle 2 includes an inorganic particle 21 and a polymer 22, the inorganic particle 21 is chemically bonded with the polymer 22, a portion of the adhesive particles 2 is exposed to the surface of the binder 3, the refractive index of the inorganic particle 21 is higher than the refractive index of the binder 3, and the adhesion of the adhesive particle 21 larger than the adhesion of the inorganic particle 21. An adhesive sheet having high refractive index and high adhesion, as well as an optical member and an organic member and an organic light emission device can be provided.
    Type: Application
    Filed: August 16, 2011
    Publication date: June 20, 2013
    Applicant: Hitachi, Ltd.
    Inventors: Hiroki Kaneko, Hiroshi Sasaki, Akitoyo Konno, Tomokazu Tanase
  • Patent number: 8461576
    Abstract: An organic light-emitting diode in accordance with the present invention includes: a reflective electrode; an organic layer formed on the reflective electrode; a transparent electrode formed on the organic layer; a transparent resin layer formed on the transparent electrode; and an encapsulation glass formed on the transparent resin layer. The organic layer includes a light-emitting point. Cone- or pyramid-shaped transparent resin structures are provided in the transparent resin layer in such a manner that each of the cone- or pyramid-shaped transparent resin structures splays from the transparent resin layer toward the encapsulation glass in a normal direction of the encapsulation glass. A refractive index of the transparent resin layer is 1.3 times or more to 1.6 times or less as high as that of the cone- or pyramid-shaped transparent resin structures.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: June 11, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Akitoyo Konno, Shingo Ishihara, Hiroshi Sasaki
  • Patent number: 8411222
    Abstract: In a liquid crystal display device and a video display device using the same, for suppressing light unevenness at the end of a display region, the video display device is provided with a liquid crystal display device and a housing configured to support the liquid crystal display device, wherein the liquid crystal display device includes a liquid crystal panel, a first frame and a liquid crystal support member which interpose the liquid crystal panel therebetween, a light guide plate which is disposed at the liquid crystal support member on a side opposite to a side where the liquid crystal panel is disposed, and a light source which is disposed at a side surface of the light guide plate, and wherein a cushion member is disposed between the liquid crystal support member and the light guide plate.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: April 2, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Akitoyo Konno, Hiroshi Sasaki, Katsunari Sato
  • Publication number: 20130056717
    Abstract: An organic light-emitting device including a first substrate, a second substrate, a light drawing-out layer disposed between the first substrate and the second substrate, a transparent electrode disposed between the light drawing-out layer and the first substrate, a reflection electrode disposed between the transparent electrode and the first substrate, and a first light-emitting unit disposed between the transparent electrode and the reflection electrode. The first light-emitting unit includes a first light-emitting layer that emits a first light-emitting color.
    Type: Application
    Filed: April 2, 2010
    Publication date: March 7, 2013
    Applicant: HITACHI, LTD.
    Inventors: Shingo Ishihara, Hiroshi Sasaki, Akitoyo Konno
  • Publication number: 20130015496
    Abstract: A power semiconductor device is provided in which reliability can be improved when the parallel number of semiconductor devices increases. When a bonding face on collector electrode is on an upper side, and a bonding face on emitter electrode is on a lower side, a collector electrode joint region as a joint region between a collector trace and a collector electrode on a chip mounted substrate and an emitter electrode joint region as a joint region between an emitter trace and an emitter electrode are located at a same position in an up-and-down direction and are adjacent in a right-and-left direction at an interval of 2 mm or more and 4 mm or less.
    Type: Application
    Filed: July 9, 2012
    Publication date: January 17, 2013
    Applicant: Hitachi, Ltd.
    Inventors: Akitoyo Konno, Katsunori Azuma, Takashi Ando
  • Patent number: 8339356
    Abstract: A liquid crystal display apparatus includes a white color light source and a coloring light source, a detection circuit which detects a brightness of an input image signal, an image quality processing calculation circuit, a light source control circuit, and an image control circuit. The coloring light source includes a blue light source. The image quality processing calculation circuit outputs to the light source control circuit a light source control signal for (1) increasing a light intensity of the coloring light source when an average luminance of the input image signal is detected to be higher than a predetermined luminance based on a detection result of the detection circuit, and for (2) turning-on only the white color light source without turning-on the coloring light source when the average luminance of the input image signal is detected to be lower than the predetermined luminance.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: December 25, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yuka Utsumi, Yasushi Tomioka, Akitoyo Konno, Katsumi Kondo
  • Patent number: 8284350
    Abstract: A lighting system has light-emitting diodes as light sources mounted on a circuit board, in which the light-emitting diodes include a red light-emitting diode, blue light-emitting diode and a green light-emitting diode, the light-emitting diodes are constituted of one single unit including one for each of the red, blue and green light-emitting diodes, and the one single unit is repeatedly arranged as plural pieces on the same circuit board, and each of the red, blue and green light-emitting diodes is individually connected electrically to emit a light.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: October 9, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Abe, Akitoyo Konno, Kaoru Katayama, Takeshi Miitsu
  • Patent number: 8259257
    Abstract: The liquid crystal display apparatus includes a liquid crystal panel and the back light device for emitting the light from a light source to the liquid crystal panel through a lens. The light source includes a first LED for emitting the light of a first color, a second LED for emitting the light of a second color, a third LED for emitting the light of a third color, a fourth LED for emitting the light of the third color, a fifth LED for emitting the light of the second color, and a sixth LED for emitting the light of the first color. The first, second, third, fourth, fifth and sixth LEDs are arranged on the wiring board in such a manner as to offset the deviation of the light distribution.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: September 4, 2012
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Yutaka Akiba, Ikuo Hiyama, Kiyomi Nakamura, Yoshinori Aono, Makoto Tsumura, Akitoyo Konno, Norihiro Uemura
  • Patent number: 8089582
    Abstract: An object of the present invention is to provide a liquid crystal display device having a light guide plate that is capable of providing improved liquid crystal display performance without generating a striped image. The liquid crystal display device includes a light guide plate, which illuminates a liquid crystal panel from its rear surface, and light sources, which shed a light ray on the light guide plate. The rear surface of the light guide plate is separated into a plurality of rear surface divisions by concave grooves. The light sources can adjust the brightness of each rear surface division. The display performance of the liquid crystal panel is improved by individually managing a plurality of regions of the liquid crystal panel, which correspond to the rear surface divisions, and darkening a rear surface division that corresponds to a region where the black color is predominant.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: January 3, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshifumi Sekiguchi, Akitoyo Konno, Hiroshi Sasaki
  • Publication number: 20110278557
    Abstract: An organic light emitting diode has a reflection electrode, an organic layer with a luminous point, a transparent electrode, an output-side substrate, and a light scattering layer in contact with the output-side substrate. The light scattering layer is made of a base material and particles contained therein. These particles are higher in refractive index than the base material and the output-side substrate. The luminous point emits light at an emission peak wavelength ? (nm). Letting a height from an interface between the electrode and the organic layer to the luminous point be “a×d” (where d (nm) is the thickness of the organic layer, 0<a<1), the height satisfies: (2m?155/180)?/4/n/cos 35°?a×d?(2m?155/180)?/4/n/cos 50° (where n is the refractive index of the organic layer, and m is an integer larger than or equal to 1).
    Type: Application
    Filed: May 5, 2011
    Publication date: November 17, 2011
    Inventors: Akitoyo KONNO, Shingo Ishihara, Hiroki Kaneko, Masaaki Fujimori
  • Patent number: 7990491
    Abstract: A liquid crystal display device has a thin structure with a backlight device appropriate for illuminating a liquid crystal panel where there is no area in band form where the brightness is inconsistent. The size of the diffusion plate that forms the optical sheet of the backlight device is made smaller than the opening for illumination in the diffusion region, and the diffusion plate is not provided in the vicinity of the end portions of the opening for illumination in the configuration. In this configuration, the reflection properties are different in the vicinity of the end portions and as the center portion of the opening for illumination, and the brightness increases in the vicinity of the end portions of the backlight device, so that an area in band form where the brightness is inconsistent can be prevented from being created in the end portions of the display device.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: August 2, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Daisuke Kajita, Yoshifumi Sekiguchi, Akitoyo Konno, Makoto Tsumura, Ikuo Hiyama
  • Patent number: 7990369
    Abstract: An image display apparatus configured by a display panel having an image memory element in a pixel, which achieves low power consumption. A nonvolatile image memory element 1, which can change the resistance value by phase change, is connected to a pixel electrode 25 of a liquid crystal element 5. The output of a thin-film transistor 17 driven by scanning and signal electrode lines 7, 9 is connected to the pixel electrode 25. When the scanning electrode line 7 is selected to have a high level voltage, the thin-film transistor 17 is turned on and a current signal flowing through the signal electrode 9 is sent through the image memory element 1 to a reference electrode line 15. Depending on the current value or pulse width passing through the image memory element 1, the resistance of the image memory element 1 is changed and is stored as a resistance value.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: August 2, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Tsunenori Yamamoto, Tetsuya Ooshima, Susumu Edo, Akitoyo Konno
  • Publication number: 20110147777
    Abstract: An organic light-emitting diode in accordance with the present invention includes: a reflective electrode; an organic layer formed on the reflective electrode; a transparent electrode formed on the organic layer; a transparent resin layer formed on the transparent electrode; and an encapsulation glass formed on the transparent resin layer. The organic layer includes a light-emitting point. Cone- or pyramid-shaped transparent resin structures are provided in the transparent resin layer in such a manner that each of the cone- or pyramid-shaped transparent resin structures splays from the transparent resin layer toward the encapsulation glass in a normal direction of the encapsulation glass. A refractive index of the transparent resin layer is 1.3 times or more to 1.6 times or less as high as that of the cone- or pyramid-shaped transparent resin structures.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 23, 2011
    Inventors: Akitoyo Konno, Shingo Ishihara, Hiroshi Sasaki
  • Publication number: 20110128306
    Abstract: A liquid crystal display apparatus includes a white color light source and a coloring light source, a detection circuit which detects a brightness of an input image signal, an image quality processing calculation circuit, a light source control circuit, and an image control circuit. The coloring light source includes a blue light source. The image quality processing calculation circuit outputs to the light source control circuit a light source control signal for (1) increasing a light intensity of the coloring light source when an average luminance of the input image signal is detected to be higher than a predetermined luminance based on a detection result of the detection circuit, and for (2) turning-on only the white color light source without turning-on the coloring light source when the average luminance of the input image signal is detected to be lower than the predetermined luminance.
    Type: Application
    Filed: February 7, 2011
    Publication date: June 2, 2011
    Inventors: Yuka Utsumi, Yasushi Tomioka, Akitoyo Konno, Katsumi Kondo
  • Patent number: 7948581
    Abstract: In a liquid crystal display equipped with a side edge backlight device, visualization of “a dot provided to a light guide plate” in the vicinity of the light source while keeping the luminance of the display screen. The shapes and the arrangement of the light diffusing dots (dots) provided to the principal surface of the light guide plate of the backlight device are made different between the area of the principal surface in the vicinity of the light source and the other areas, thereby adjusting the whiteness of the light guide plate in the vicinity of the light source. The plurality of dots formed in the vicinity of the light source are each composed of a first section for diffusing the light propagating the light guide plate, and a second section surrounded by the first section and less capable of diffusing the light, and are disposed in the vicinity of the light source in a zigzag manner.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: May 24, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hitoshi Taniguchi, Akitoyo Konno
  • Patent number: 7932681
    Abstract: A lighting device includes at least two lines connected in parallel, a constant current source for applying a constant current to at least one of the at least two lines, an ON/OFF controller, and a voltage detector for measuring a value of voltage flowing in each line of the at least two lines. Each line of the at least two lines is formed by one or more light-emitting diodes and a switch for turning ON/OFF the current flowing in the light-emitting diodes connected in series, and according to the voltage value of each line of the at least two lines measured by the voltage detector, the ON/OFF controller controls the duty ratio of the one or more light-emitting diodes of each line in accordance with the voltage measured.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: April 26, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Akitoyo Konno, Tsunenori Yamamoto, Tatsuki Inuzuka
  • Patent number: 7905616
    Abstract: An illumination device has at least one fluorescent tube, a lower frame supporting the fluorescent tube, a light diffusion plate which opposes the lower frame with the fluorescent tube being interposed therebetween for forward diffusion of output light of the fluorescent tube, a reflection sheet disposed along the fluorescent tube side of the lower frame for reflecting the fluorescent light toward the light diffuser plate, and an upside reflector covering an electrode of the fluorescent tube for reflecting the light toward the light diffuser. When letting a direction along a length of the fluorescent tube be a horizontal direction, a distance between the fluorescent tube and the reflection sheet at at least one of nearby portions of right and left ends of the illuminator is greater than such distance at a central portion thereof. A liquid crystal display (LCD) apparatus using the illuminator is also disclosed.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: March 15, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Akitoyo Konno, Yoshifumi Sekiguchi, Makoto Tsumura, Ikuo Hiyama, Daisuke Kajita
  • Patent number: 7893903
    Abstract: A liquid crystal display apparatus having first white color light sources and blue and/or red second coloring light sources disposed on a back side of a liquid crystal panel, and an image quality processing calculation circuit for detecting a brightness of input image signals, in accordance with a detection result, controlling intensities of the first white color light sources and/or second coloring light sources and correcting pixel signals to be supplied to the liquid crystal panel.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: February 22, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yuka Utsumi, Yasushi Tomioka, Akitoyo Konno, Katsumi Kondo