Patents by Inventor Yoshifumi Sekiguchi

Yoshifumi Sekiguchi 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).

  • Publication number: 20190323835
    Abstract: A height detection apparatus is configured to project a pattern on a sample arranged at any of a plurality of reference positions and configured to detect a height of the sample. The apparatus includes: a projection optical system that generates a plurality of spatially separated light beams each having the pattern and projects the generated spatially separated light beams onto the sample; an imaging element that images the pattern reflected from the sample; a detection optical system that guides the pattern reflected from the sample to the imaging element; and at least one optical path length correction member disposed on an optical path different from an optical path having a shortest optical path length among a plurality of optical paths corresponding to the plurality of light beams at a position where the plurality of light beams is spatially separated.
    Type: Application
    Filed: April 9, 2019
    Publication date: October 24, 2019
    Inventors: Yoshifumi SEKIGUCHI, Naoya NAKAI, Koichi TANIGUCHI, Makoto SUZUKI
  • Publication number: 20190115186
    Abstract: The present invention provides a light guide capable of guiding light generated by a scintillator at high efficiency to a photoreceiving element, a detector, and a charged particle beam device. For attaining the purpose, the present invention proposes a light guide that guides light generated by a scintillator to a photoreceiving element, provided with a scintillator containment portion formed of a first surface facing a surface opposite to a charged particle incident surface of the scintillator and a second surface facing a surface different from the surface opposite to the charged particle incident surface of the scintillator, and a tilted surface reflecting light incident from the second surface to the inside of the light guide.
    Type: Application
    Filed: February 3, 2017
    Publication date: April 18, 2019
    Applicant: Hitachi High-Technologies Corporation
    Inventors: Yoshifumi SEKIGUCHI, Shin IMAMURA, Hajime KAWANO, Shahedul HOQUE
  • Publication number: 20180294386
    Abstract: The purpose of the present invention is to decrease the process temperature for a multilayer glass into which an optical element is to be packed, thereby reducing the damage to the optical element during processing. A multilayer glass according to the present invention is so configured that a gap formed between glass plates is sealed with a sealing material that can fix at a process temperature lower than a temperature employed for the processing of an optical element (see FIG. 1).
    Type: Application
    Filed: March 14, 2016
    Publication date: October 11, 2018
    Applicant: HITACHI, LTD.
    Inventors: Hiroki KANEKO, Takashi NAITO, Yoshifumi SEKIGUCHI, Tatsuya MIYAKE
  • Publication number: 20170178577
    Abstract: In a color display device, when using white (W) sub-pixels in addition to subpixels of red (R) and green (G) plus blue (B) without increasing a wiring line number, the per-color pixel number in a unit area decreases so that the image resolution is deteriorated. The area and number of subpixels are adjusted in accordance with the visual sensitivity or luminosity required. Practically, the area of red (R) and blue (B) subpixels which are relatively low in luminosity is set to be about two times greater than the area of green (G) and white (W) subpixels that are relatively high in luminosity while letting the number of green (G) and white (W) subpixels be twice the number of red (R) and blue (B) subpixels. A larger subpixel is configured from a plurality of unit subpixels. A smaller subpixel is formed of a one unit subpixel.
    Type: Application
    Filed: March 9, 2017
    Publication date: June 22, 2017
    Inventors: Shoichi HIROTA, Shinichi KOMURA, Yoshifumi SEKIGUCHI, Tsunenori YAMAMOTO, Masaya ADACHI
  • Patent number: 9626918
    Abstract: In a color display device, when using white (W) sub-pixels in addition to subpixels of red (R) and green (G) plus blue (B) without increasing a wiring line number, the per-color pixel number in a unit area decreases so that the image resolution is deteriorated. The area and number of subpixels are adjusted in accordance with the visual sensitivity or luminosity required. Practically, the area of red (R) and blue (B) subpixels which are relatively low in luminosity is set to be about two times greater than the area of green (G) and white (W) subpixels that are relatively high in luminosity while letting the number of green (G) and white (W) subpixels be twice the number of red (R) and blue (B) subpixels. A larger subpixel is configured from a plurality of unit subpixels. A smaller subpixel is formed of a one unit subpixel.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: April 18, 2017
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Shoichi Hirota, Shinichi Komura, Yoshifumi Sekiguchi, Tsunenori Yamamoto, Masaya Adachi
  • Publication number: 20150035738
    Abstract: In a color display device, when using white (W) sub-pixels in addition to subpixels of red (R) and green (G) plus blue (B) without increasing a wiring line number, the per-color pixel number in a unit area decreases so that the image resolution is deteriorated. The area and number of subpixels are adjusted in accordance with the visual sensitivity or luminosity required. Practically, the area of red (R) and blue (B) subpixels which are relatively low in luminosity is set to be about two times greater than the area of green (G) and white (W) subpixels that are relatively high in luminosity while letting the number of green (G) and white (W) subpixels be twice the number of red (R) and blue (B) subpixels. A larger subpixel is configured from a plurality of unit subpixels. A smaller subpixel is formed of a one unit subpixel.
    Type: Application
    Filed: October 20, 2014
    Publication date: February 5, 2015
    Inventors: Shoichi HIROTA, Shinichi KOMURA, Yoshifumi SEKIGUCHI, Tsunenori YAMAMOTO, Masaya ADACHI
  • Patent number: 8891044
    Abstract: In a color display device, when using white (W) sub-pixels in addition to subpixels of red (R) and green (G) plus blue (B) without increasing a wiring line number, the per-color pixel number in a unit area decreases so that the image resolution is deteriorated. The area and number of subpixels are adjusted in accordance with the visual sensitivity or luminosity required. Practically, the area of red (R) and blue (B) subpixels which are relatively low in luminosity is set to be about two times greater than the area of green (G) and white (W) subpixels that are relatively high in luminosity while letting the number of green (G) and white (W) subpixels be twice the number of red (R) and blue (B) subpixels. A larger subpixel is configured from a plurality of unit subpixels. A smaller subpixel is formed of a one unit subpixel.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: November 18, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Display Co., Ltd.
    Inventors: Shoichi Hirota, Shinichi Komura, Yoshifumi Sekiguchi, Tsunenori Yamamoto, Masaya Adachi
  • Patent number: 8780298
    Abstract: A liquid crystal display device includes: a light guide plate having an emission surface emitting light to a liquid crystal panel and a plurality of side surfaces; and a plurality of light sources LEDPKG inputting light to the light guide plate from at least one side surface. The light guide plate is divided into a plurality of parts extending from the light inputted one side surface to an opposite side surface and the plurality of parts include at least one first part and at least one second part. The first part and the second part are adjacent to each other, and two-dimensionally overlap with the display area, respectively. At least the second part has a shape for emitting the light from an emission surface, and a sectional shape in the extending direction of the first part is greater than that of the second part.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: July 15, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshifumi Sekiguchi, Ikuo Hiyama
  • Patent number: 8659718
    Abstract: Provided is a liquid crystal display device (1) with increased light use efficiency and thin frame on the side on which the light emitting diode is disposed, including: a liquid crystal panel (3); a backlight unit (5) including a light guide plate (12) and light emitting diodes being disposed side by side in a longitudinal direction of an incident surface; an intermediate frame (9), which includes a plurality of protruding portions that protrude to an exiting surface side of the light guide plate (12); and an end portion reflection sheet (14), which is disposed on an exiting surface side of the intermediate frame (9) and adjacent to the plurality of protruding portions, extends in an array direction of the light emitting diodes, and includes tongue-shaped portions each extending between adjacent ones of the plurality of protruding portions.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: February 25, 2014
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshifumi Sekiguchi, Naoki Sato, Naoki Iwasaki, Takaaki Kitada
  • Patent number: 8421957
    Abstract: A liquid crystal display device includes a liquid crystal panel and an illuminating device having a plurality of LED packages which include LED's and a lens. Each LED package includes a high refractive index member containing a substance having a larger refractive index than that of a material forming the lens and which seals the LED. The lens is shaped to have a recess near its center, and is shaped so that a moving radius increases as a polar angle increases within a range of 0 to 80 degrees. The moving radius is defined as a distance starting from the lens center and ending in the lens surface, and the polar angle is defined as an angle that is made by the moving radius to the center axis that is vertical to a plane on which said LED package is located and passing through the center of the lens.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: April 16, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshifumi Sekiguchi, Ikuo Hiyama, Tsunenori Yamamoto, Hiroki Kaneko, Toshiaki Tanaka
  • Patent number: 8384845
    Abstract: The side surface of the light guide plate includes an incident surface which faces the light source unit in an opposed manner, and a fixing surface which is directed in the left-and-right direction orthogonal to the top-and-bottom direction which is the direction along which the light source unit and the incident surface each other in an opposed manner. An engaging portion which is engageable with a lower frame is formed on the fixing surface or an edge portion which forms the fixing surface. The engaging portion is configured to allow a change of a distance between the incident surface and the lower frame due to expansion or shrinkage of the light guide plate while restricting the movement of the light guide plate in the top-and-bottom direction.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: February 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshifumi Sekiguchi, Yoshiro Mikami, Ikuo Hiyama, Naoki Iwasaki, Masaki Tsubokura
  • Publication number: 20120162569
    Abstract: Provided is a liquid crystal display device (1) with increased light use efficiency and thin frame on the side on which the light emitting diode is disposed, including: a liquid crystal panel (3); a backlight unit (5) including a light guide plate (12) and light emitting diodes being disposed side by side in a longitudinal direction of an incident surface; an intermediate frame (9), which includes a plurality of protruding portions that protrude to an exiting surface side of the light guide plate (12); and an end portion reflection sheet (14), which is disposed on an exiting surface side of the intermediate frame (9) and adjacent to the plurality of protruding portions, extends in an array direction of the light emitting diodes, and includes tongue-shaped portions each extending between adjacent ones of the plurality of protruding portions.
    Type: Application
    Filed: December 21, 2011
    Publication date: June 28, 2012
    Applicant: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshifumi SEKIGUCHI, Naoki SATO, Naoki IWASAKI, Takaaki KITADA
  • Patent number: 8194203
    Abstract: A liquid crystal display device is provided with a backlight where there is little inconsistency in the temperature in the fluorescent lamps and which can illuminate the liquid crystal panel well even when the structure is thin.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: June 5, 2012
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Yoshifumi Sekiguchi, Naoki Iwasaki, Yoshihiro Imajo
  • Patent number: 8164712
    Abstract: A liquid crystal display device includes a backlight device, a liquid crystal panel and a light source unit. The light source unit includes a case having an opening surface, a fluorescent tube, an electric holder, and a cover member. The cover member includes a shield plate, a fixed groove and an overhanging portion, wherein the overhanging portion is provided at an edge of the fixed groove and on a side of the liquid crystal panel with respect to the fluorescent tube which includes a portion which extends through the fixed groove. A portion of the cover member includes a protrusion which is a separate member from the overhanging portion and which extends more toward the liquid crystal panel than a surface portion of the overhanging portion.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: April 24, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshifumi Sekiguchi, Yoshinori Aono, Masaki Tsubokura
  • 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
  • Patent number: 8054407
    Abstract: The present invention provides a light-weighted backlight capable of ensuring a sufficient light quantity at a low cost. A backlight is arranged below a liquid crystal panel. A light source is arranged in the vertical direction with respect to a screen of the liquid crystal panel so that light from the light source is directed toward the liquid crystal panel by a reflector. Due to such a constitution, the reflector can also function as a back lid of the backlight. Further, the reflector plays a role of directing the light from the light source toward the liquid crystal panel and hence, a light guide plate can be omitted. Due to such a constitution, the present invention can realize the reduction of weight and cost of the backlight or the liquid crystal display panel.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: November 8, 2011
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Yoshihiro Imojo, Yoshifumi Sekiguchi
  • Publication number: 20110267559
    Abstract: An illuminating device capable of being produced at low costs and irradiating rays of light uniformly to a liquid crystal panel. The illuminating device has a plurality of LED packages each having LED's and a lens, the LED packages being congregated on a plane in a large area. Each of the LED packages includes at least four LED's corresponding to LED's for emitting at least red, green and blue, and at least two of the LED's in each LED package are positioned symmetrically to the center of the lens and emit the same color.
    Type: Application
    Filed: July 13, 2011
    Publication date: November 3, 2011
    Inventors: Yoshifumi Sekiguchi, Ikuo Hiyama, Tsunenori Yamamoto, Hiroki Kaneko, Toshiaki Tanaka
  • Patent number: 8004545
    Abstract: A display apparatus is arranged to have pixels, each of which has a RGBW (Red, Green, Blue and White) wavelength distribution characteristic, located two-dimensionally. The display apparatus includes an input unit for inputting a signal for controlling a using ratio of a W signal, a color signal converting unit for calculating a RGBW driving signal from a RGB input signal and the W using ratio. The RGBW signal is calculated so as to control the contribution of the W signal to the image quality. The display apparatus switches the display from the contrast-highlighted display in a relatively bright lighting condition to the color-reproducibility-highlighted display in a relatively gloomy lighting condition.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: August 23, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tatsuki Inuzuka, Shinichi Komura, Yoshifumi Sekiguchi
  • 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
  • Publication number: 20110181809
    Abstract: The side surface of the light guide plate includes an incident surface which faces the light source unit in an opposed manner, and a fixing surface which is directed in the left-and-right direction orthogonal to the top-and-bottom direction which is the direction along which the light source unit and the incident surface each other in an opposed manner. An engaging portion which is engageable with a lower frame is formed on the fixing surface or an edge portion which forms the fixing surface. The engaging portion is configured to allow a change of a distance between the incident surface and the lower frame due to expansion or shrinkage of the light guide plate while restricting the movement of the light guide plate in the top-and-bottom direction.
    Type: Application
    Filed: January 24, 2011
    Publication date: July 28, 2011
    Inventors: Yoshifumi Sekiguchi, Yoshiro Mikami, Ikuo Hiyama, Naoki Iwasaki, Masaki Tsubokura