Patents by Inventor Hidenao Kubota

Hidenao Kubota 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: 11207052
    Abstract: To reduce noise which leaks to the outside in an ultrasonic diagnostic apparatus. An internal AC wiring unit 34 is composed of internal AC wiring which is installed on the input side of a power source circuit, and a shield case 38 which accommodates it. The internal AC wiring includes an inlet, a plurality of connectors, a relay substrate, and a plurality of internal AC cables. The internal AC wiring is protected from radiation noise which is generated in a casing 22 by the shield case 38. Thereby, the noise which leaks to the outside via an external AC cable is reduced.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: December 28, 2021
    Assignee: HITACHI, LTD.
    Inventors: Hidenao Kubota, Masaharu Hirata, Yuta Tokita
  • Publication number: 20200253581
    Abstract: To reduce noise which leaks to the outside in an ultrasonic diagnostic apparatus. An internal AC wiring unit 34 is composed of internal AC wiring which is installed on the input side of a power source circuit, and a shield case 38 which accommodates it. The internal AC wiring includes an inlet, a plurality of connectors, a relay substrate, and a plurality of internal AC cables. The internal AC wiring is protected from radiation noise which is generated in a casing 22 by the shield case 38. Thereby, the noise which leaks to the outside via an external AC cable is reduced.
    Type: Application
    Filed: January 8, 2020
    Publication date: August 13, 2020
    Applicant: Hitachi, Ltd.
    Inventors: Hidenao Kubota, Masaharu Hirata, Yuta Tokita
  • Patent number: 9086594
    Abstract: A lighting device according to the present invention includes: a curvedly shaped base chassis having a reflection layer on its inner surface; an optical sheet facing the reflection layer to output illuminating light of the lighting device; a light source group, disposed between the base chassis and the optical sheet, including first light sources and second light sources emitting light in mutually opposite directions; a light source substrate mounted with the light source group, and a light distribution adjusting member, covering the optical sheet side of the light source group, to direct light from the light source group into predetermined directions. The directions of light emission from the light source group are in parallel with the light output surface of the optical sheet. The reflection layer is curved such that a portion thereof on each of the two direction sides is concave away from the optical sheet.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: July 21, 2015
    Assignee: HITACHI MAXELL, LTD.
    Inventors: Yuya Ogi, Satoshi Ouchi, Seiji Murata, Hidenao Kubota
  • Publication number: 20140204307
    Abstract: A lighting device according to the present invention includes: a curvedly shaped base chassis having a reflection layer on its inner surface; an optical sheet facing the reflection layer to output illuminating light of the lighting device; a light source group, disposed between the base chassis and the optical sheet, including first light sources and second light sources emitting light in mutually opposite directions; a light source substrate mounted with the light source group, and a light distribution adjusting member, covering the optical sheet side of the light source group, to direct light from the light source group into predetermined directions. The directions of light emission from the light source group are in parallel with the light output surface of the optical sheet. The reflection layer is curved such that a portion thereof on each of the two direction sides is concave away from the optical sheet.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 24, 2014
    Applicant: Hitachi Mixell, Ltd.
    Inventors: Yuya OGI, Satoshi OUCHI, Seiji MURATA, Hidenao KUBOTA
  • Patent number: 8736543
    Abstract: An area control section individually sets illumination intensity (light control value) of each backlight cell corresponding to each area of the display screen. A spatial filter corrects the light control values so that spatial distribution of the light control values becomes more moderate between adjoining areas. A black area control section sets the minimum value of the light control value based on a “black area” in the screen. A power control section corrects the light control values so that power consumption of the backlight does not exceed a limit value. A shading control section corrects the light control values to relatively lower brightness in the peripheral part of the screen compared to the central part of the screen. A micro-controller switches the operations of the above light control value correcting sections according to an image display mode selected by the user.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: May 27, 2014
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Hidenao Kubota, Yasutaka Tsuru
  • Patent number: 8687148
    Abstract: The present invention enables a liquid crystal display device using LEDs as a light source to reduce uneven brightness, increase efficiency of heat discharged from the LEDs, and provide area brightness control. The liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes a light guide panel and a plurality of LEDs arranged on a line. The light guide panel includes a concave portion extending in a longitudinal direction of the light guide panel. A large number of LEDs are placed in the concave portion of the light guide panel. The plurality of LEDs arranged on a line emit light alternately in opposite directions. This configuration allows for uniform brightness distribution without forming a large number of concave portions in the light guide panel. Further, this configuration also allows for area brightness control by controlling a large number of LEDs by group.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: April 1, 2014
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Hidenao Kubota, Hiroshi Iwasa, Koichi Sakita
  • Publication number: 20140028953
    Abstract: An objective of the present invention is to enable making a liquid crystal display device thin, and to enable regional control of window brightness with power conservation. A backlight of a liquid crystal display device comprises a plate-shaped light guiding plate (20). Recesses (21) are formed on the light guiding plate (20), and LEDs (30) are housed in the recesses (21). The LEDs (30) further comprise light emitting faces (301) and rear faces. The rear faces of the LEDs (30) are brought into contact with the interior walls of the recesses (21) of the light guiding plate, and light that leaks from the rear faces of the LEDs (30) is proactively used. A resin (25) for optical coupling is positioned between the LEDs (30) and the interior faces of the recesses (21). Using the light from the rear faces of the LEDs (30) allows reducing the number of LEDs that need to be lit, allowing obtaining a liquid crystal display device with minimized power consumption.
    Type: Application
    Filed: January 26, 2011
    Publication date: January 30, 2014
    Inventors: Hidenao Kubota, Satoshi Ouchi
  • Patent number: 8596848
    Abstract: A cross section of each divided light guiding plate is formed in a wedge shape, a step is formed at a portion of each divided light guiding plate where LEDs are arranged, and holes used for accommodating the LEDs are formed at the step. A plated face is formed on a lower face of each LED, and is coupled to a wiring substrate through solder. Each LED includes a light-emitting face, a lower frame, and an upper frame. The height of the lower frame of each LED is larger than the height of the upper frame, so that a lower end of the light-emitting face of each LED can be always located higher than a lower end of the divided light guiding plate.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: December 3, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Hidenao Kubota, Satoshi Ouchi, Hiroshi Iwasa, Mayumi Nagayoshi, Hajime Inoue
  • Publication number: 20130278866
    Abstract: A plurality of backlight blocks are configured by being juxtaposed in the plane direction of an illumination device and include a bidirectional backlight block. Light sources are formed on both lateral sides of the bidirectional backlight block in the direction of the axes of emission of the light sources, the light sources formed on one lateral side are arranged so that light is emitted in the direction toward the light sources formed on the other lateral side, the light sources formed on the other lateral side are arranged so that light is emitted in the direction toward the light sources formed on the one lateral side, and the bidirectional backlight block is arranged in the center part of the illumination device in the direction of the axes of emission of the light sources.
    Type: Application
    Filed: April 19, 2013
    Publication date: October 24, 2013
    Applicant: HITACHI CONSUMER ELECTRONICS CO., LTD.
    Inventors: Makoto TSUMURA, Satoshi OUCHI, Hidenao KUBOTA, Masayuki TANABE
  • Patent number: 8514349
    Abstract: A plurality of backlight blocks are aligned, each block includes light sources and a unit light guide plate for guiding light from the light sources to the side of a liquid crystal panel, unit diffusion patterns are formed in a zigzag alignment on the unit light guide plate and another diffusion pattern is formed on the back of the unit light guide plate. One side of the unit light guide plate is defined as a light entrance surface and LEDs as the light sources are aligned along the light entrance surface to satisfy p?a?c where a indicates the size of the unit diffusion pattern in a direction orthogonal to an exit optical axis of the LEDs, c indicates the size of an LED emission surface in the direction of alignment of the LEDs, and p indicates the pitch of alignment of the light sources.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: August 20, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Satoshi Ouchi, Hajime Inoue, Hidenao Kubota, Mayumi Nagayoshi
  • Publication number: 20130169905
    Abstract: A backlight device, for irradiating lights on a liquid crystal panel, comprises plural numbers of backlight blocks, each backlight block has a sheet-like reflection member (19), which is disposed on a bottom surface of the backlight block, a plate-like optical element (2), provided facing to the reflection member and disposed separating in direction perpendicular to a light irradiating surface of the backlight from the reflection member, and LEDs (7), disposed within a space between the optical element and the reflection member, for emitting the lights in direction in parallel with the light irradiating surface of the backlight.
    Type: Application
    Filed: June 14, 2012
    Publication date: July 4, 2013
    Inventors: SATOSHI OUCHI, Hidenao KUBOTA, Mayumi NAGAYOSHI, Makoto TSUMURA
  • Patent number: 8477259
    Abstract: In order to achieve a liquid crystal display device for TV with a reduced thickness, light weight, and uniform brightness, a liquid crystal display panel and a backlight are housed in a mold. In the backlight, light emitting diodes are provided in a frame-like flexible wiring substrate, in which plural the light emitting diodes are provided on each of four side surfaces of a light guide panel. A distance between the light emitting diodes in the central portion of each side of the light guide panel is small, while a distance in the corners of each side is large.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: July 2, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Hidenao Kubota, Nobuo Masuoka
  • Patent number: 8421955
    Abstract: An LCD device using LEDs as light sources provided herein is capable of reducing the manufacturing cost and the power consumption by a reduction in the number of LEDs used. A backlight according to the present invention includes LEDs mounted on a wiring board and a light guide plate having a matrix array of light guide plate blocks assigned the LEDs. The number of LEDs assigned to the block located in a peripheral area is smaller than the number assigned to the block located around the center to reduce the number of LEDs used in the backlight. If a ratio of the brightness in a peripheral area of the screen to the brightness in a central area is 60% or higher, the human eye does not perceive non-uniform luminance. Thus, the manufacturing cost and the power consumption of the LCD device can be reduced.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: April 16, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Hidenao Kubota, Satoshi Ouchi
  • Patent number: 8421788
    Abstract: It is an object of the present invention to provide an image display apparatus which enables cost reduction while being free from electromagnetic interference problems. A power supply circuit comprises, on a single circuit board, an AC inlet to which a power cord is connected from an external AC power supply, a filter circuit to which an inductance element is connected to suppress leakage of electromagnetic waves to the outside of the image display apparatus, and a switch which switches on/off an AC output supplied from the filter circuit. The circuit board of the power supply circuit is entirely covered by electromagnetic shielding means to shield electromagnetic waves. The electromagnetic shielding means is composed of, for example, a first shielding section which surrounds the lateral side of the circuit board and a second shielding section which covers the upper side of the circuit board. The second shielding section is formed of a part of the flat section of a rear cover of the image display apparatus.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: April 16, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Hidenao Kubota, Yuzo Nishinaka, Yuki Iwane, Yutaka Yamada, Katsunobu Kimura
  • Patent number: 8363179
    Abstract: A liquid crystal display device with improved thermal exhaustion property, enabling a thickness reduction, includes a backlight including light sources illuminating a liquid crystal panel from a back face, and a chassis holding the backlight. The backlight includes: plural light-source units each including a combination of a LED emitting light in a direction parallel to a display surface of the panel, a wiring board mounted with the LED, and a light-guide plate having translucency for guiding the LED light toward the panel; a metal chassis supporting the light-source units; and a thermally conductive sheet tightly inserted between the metal chassis and a reverse side of the wiring board opposite to the LED-mounted face. A wiring pattern is formed on the reverse side. The metal chassis and the wiring pattern located within a predetermined distance of the LED outer periphery are connected through the thermally conductive sheet.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: January 29, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Hidenao Kubota, Kazuhiro Kaizaki, Shigeyuki Sasaki, Takeshi Mochizuki, Toshihiro Tsutsui
  • Patent number: 8350986
    Abstract: A backlight unit of thin-type comprises: at least one or more light source(s); plural numbers of light guide plates, each of which is configured to guide and irradiate the light of the light source(s) to a side of a liquid crystal panel; and a chassis, on which the light source(s) and the light guide plates are fixed, thereby being constructed by aligning the light guide plates, wherein the following conditions are satisfied: 15.0 mm>h, 20°???60° when assuming that a distance from an irradiation surface of the backlight unit to the light guide plate is “h”, and that an angle indicative of a half-value light intensity of a light emitting from a light emission surface of the light guide plate, thereby providing a video of high picture quality, and there is also provided a video display apparatus applying the same therein.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: January 8, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Satoshi Ouchi, Hajime Inoue, Hidenao Kubota, Mayumi Nagayoshi
  • Patent number: 8320119
    Abstract: For improving a cooling efficiency of a display panel in a flat-type image display, various substrates and an image display element are disposed within a thin-sized housing thereof, including: a display panel; a chassis supporting the display panel from a rear surface side thereof; a front surface-side cover on a front side of the display panel; a rear surface-side cover on a rear side of the display panel; an image display element connected to the display panel; a display driver substrate connected to the display panel, and on a surface thereof opposite to the chassis are provided circuit parts; a power source substrate, supplying driving power to the display driver substrate and the image display element, and on a surface thereof opposite to the chassis are provided circuit parts thereof; and a first insulator board opposite to the display driver substrates and the power source substrate of the chassis.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: November 27, 2012
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Nobuyuki Isoshima, Kohei Miyoshi, Mika Ri, Yutaka Yamada, Toshihiro Tsutsui, Teppei Tanaka, Hidenao Kubota, Yuzo Nishinaka
  • Publication number: 20120140149
    Abstract: A liquid crystal display apparatus equipped with a backlight unit includes an LED, a light guide plate for light emission by guiding light from the LED to a liquid crystal panel, an LED board for driving the LED, a reflection sheet interposed between the light guide plate and the LED board, and a chassis on which the LED, the light guide plate, the reflection sheet and the LED board are mounted. The light guide plate has a half length and a half width of the liquid crystal panel, and the reflection sheet has substantially the same size as the light guide plate. The reflection sheet is extended at portions abutting on sides of the chassis to define flanges.
    Type: Application
    Filed: November 18, 2011
    Publication date: June 7, 2012
    Inventors: Koichi SAKITA, Satoshi Ouchi, Hajime Inoue, Mayumi Nagayoshi, Hidenao Kubota, Yoshiharu Yamashita, Nobuyuki Kaku
  • Publication number: 20120139885
    Abstract: According to the present invention, area control of a liquid crystal display device prevents luminance insufficiency attributing to leaking of illumination light between adjacent areas. A peak luminance detector detects a peak luminance area in which a luminance level is equal to or higher than a first threshold. A peripheral luminance detector detects luminance levels of peripheral areas located adjacent to the peak luminance area. When the average of the luminance levels of the peripheral areas is equal to or lower than a second threshold, a peak luminance corrector increases a light source luminance level of a backlight cell that corresponds to the peak luminance area.
    Type: Application
    Filed: November 15, 2011
    Publication date: June 7, 2012
    Inventors: Hiroshi IWASA, Hidenao Kubota
  • Publication number: 20120140448
    Abstract: A backlight device includes light emitting diodes (LED's) and a plate-like light guide plate which guides light from the light emitting diodes to a liquid crystal panel. Grooves are disposed on the back of the light guide plate and the light emitting diodes are disposed in the grooves. The light emitting diodes disposed in the grooves are arranged so that light emission direction thereof is parallel with light emission plane of the light guide plate. First optical pattern is disposed on first side opposite to light emission plane of light emitting diodes and second optical pattern is disposed on second side opposite to the back of light emitting diodes. The optical patterns are formed into minute prism array or lens array, for example.
    Type: Application
    Filed: November 16, 2011
    Publication date: June 7, 2012
    Inventors: Mayumi NAGAYOSHI, Satoshi Ohuchi, Hajime Inoue, Hidenao Kubota