Patents by Inventor Masaya Adachi

Masaya Adachi 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: 20110285269
    Abstract: A light-emitting device includes a substrate and a light-emitting element formed on the substrate. The light-emitting element includes a stacked layer structure portion including a reflective electrode, a light-emitting layer on the reflective electrode and a transparent electrode on the light-emitting layer which are stacked over the substrate with the reflective electrode as a bottom layer, the light-emitting layer having a flat surface provided at least on a portion of the light-emitting layer. A bank is disposed in a peripheral area surrounding the flat surface or on a peripheral portion of the flat surface and has a tilt surface tilted with respect to the flat surface. A conductive film is at least provided on the tilt surface and is electrically connected with the transparent electrode, and forms a reflective surface on the tilt surface, and an optical waveguide layer is provided in an area surrounded by the tilt surface.
    Type: Application
    Filed: August 10, 2011
    Publication date: November 24, 2011
    Inventors: Masaya Adachi, Kazutaka Tsuji, Hajime Murakami, Etsuko Nishimura
  • Patent number: 8049405
    Abstract: A self light emitting display device having high level of the external coupling efficiency and high grade image presentation as no optical cross-talk or blur can be obtained by a new light-emitting element. The device is constructed as follows. A plurality of picture elements, each of which picture elements has an organic layer composing light emitting areas, a transparent electrode and a reflective electrodes, are formed on a substrate. Between the picture elements, a bank which has a tilted reflective surface is formed so that the light emitting area is surrounded by the bank wherein the transparent optical waveguide layer is formed as optically isolated for each of the picture elements.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: November 1, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masaya Adachi, Kazutaka Tsuji, Hajime Murakami, Etsuko Nishimura
  • Publication number: 20110260605
    Abstract: A color light emitting display includes light-emitting devices of a plurality of red, green and blue pixels disposed in a matrix form. The light-emitting display takes out light from a side opposite to a substrate on which the light-emitting devices are formed. A wavelength of the light, of which an interference intensity to the light emitted from an emissive layer constituting a part of one of said light-emitting devices becomes a maximum value at 0 degree of a viewing angle, is ?imax, a wavelength of the light becomes a minimum value in the interference intensity is ?imin, a wavelength of the light becomes a maximum in a light intensity in relation to the light emitted from said emissive layer is ?emax, and a relationship of ?imax<?emax and ?imin??emax+70 nm, is satisfied for at least one color among red, green and blue.
    Type: Application
    Filed: July 6, 2011
    Publication date: October 27, 2011
    Inventors: Masaya Adachi, Toshihiro Sato, Naoki Tokuda
  • Patent number: 8031305
    Abstract: A transflective liquid crystal display includes a first substrate, a second substrate, and liquid crystal intercalated between the first and second substrates in which each pixel includes a reflection area and a transmission area. The second substrate includes pixel electrodes and common electrodes to drive the liquid crystal. In the reflection area, a reflective layer is arranged between the pixel and common electrodes and the second substrate, and a polarizing layer is disposed between the pixel and common electrodes and the reflective layer.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: October 4, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masaya Adachi, Chieko Araki, Jun Tanaka, Miharu Otani, Osamu Itou, Shinichiro Oka
  • Patent number: 8026662
    Abstract: It is an object to provide an organic light-emitting element having two or more light-emitting layers, wherein degradation of each constituent material for the light-emitting layer is reduced to improve reliability of the element. The present invention provides an organic light-emitting element having a laminated structure with a first mixed light-emitting layer 4 composed of a hole transport material, an electron transport material and a dopant which determines a color of an emitted light, and a second mixed light-emitting layer 5 composed of a hole transport material, an electron transport material and a dopant which determines a color of an emitted light, and also provides an image display device which uses the organic light-emitting element.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: September 27, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Shingo Ishihara, Sukekazu Aratani, Masaya Adachi, Takayuki Ouchi
  • Patent number: 8022431
    Abstract: An illuminating apparatus has a reduced number of mounting spots by soldering or the like to permit an increased yield rate and a reduced cost. The illuminating apparatus has light emitting diodes, lead frames, and a transparent sealer. N light emitting diodes, N sets of lead frames mounted with the N light emitting diodes, and one set or more of lead frames each not mounted with a light emitting diode are sealed by the transparent sealer for integration into a modular illuminating apparatus. Also provided are a method for fabricating the illuminating apparatus, and a display apparatus using the illuminating apparatus.
    Type: Grant
    Filed: November 3, 2005
    Date of Patent: September 20, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hiroki Kaneko, Ikuo Hiyama, Toshiaki Tanaka, Masaya Adachi, Tsunenori Yamamoto, Haruo Akahoshi
  • Publication number: 20110221998
    Abstract: An illuminating device includes: a light source; a light guide plate which converts light emitted from the light source into a surface light ray and emits the surface light ray through a front surface of the light guide plate; and an optical sheet which changes a propagation direction of the surface light ray emitted from the light guide plate. The light source is arranged in end surface different from the front surface in the light guide plate. A polarization state converting structure to convert a polarization state of the light propagating through the light guide plate is provided in a surface opposing the front surface in the light guide plate. The polarization state converting structure contains an inclination plane having a ridge line in a direction different from a direction in parallel to the longitudinal direction of the end surface.
    Type: Application
    Filed: February 17, 2011
    Publication date: September 15, 2011
    Inventors: Masaya Adachi, Tatsuya Sugita
  • Patent number: 8016445
    Abstract: A planar light emitting element is capable of outputting light having high directivity in at least one direction. The planar light emitting element has a light guide plate and first and second low refractive index layers. Light incident on the light guide plate is totally reflected on the interface between the light guide plate and the second low refractive index layer, propagates in the light guide plate, and is output from the light guide plate to the first low refractive index layer through a light output opening section. When a refractive index of the first low refractive index layer is sufficiently smaller than a refractive index of the light guide plate, the light propagates in the light guide plate at a large angle with respect to a light output surface of the light guide plate. When the difference between the refractive indexes of the first and second low refractive index layers is small, a spreading angle of light output to the first low refractive index layer is small.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: September 13, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tatsuya Sugita, Masaya Adachi, Shinichi Komura
  • Patent number: 8013961
    Abstract: An object of the present invention is to implement a bright liquid crystal display device having a high contrast ratio and a wide viewing angle. A liquid crystal display device according to the present invention has: a number of data lines; gate lines formed so as to cross the number of data lines; a number of switching elements formed in locations where the number of data lines and the number of gate lines cross; a reflection area and a transmission area formed within each pixel; a liquid crystal layer sandwiched between first and second substrates; a common electrode placed between the first substrate and the liquid crystal layer; and a pixel electrode placed between the second substrate and the liquid crystal layer, and the common electrode has slits or protrusions, and the data lines overlap the slits in the common electrode or protrusions of the common electrode in the direction of normal to a surface of the first substrate in the configuration.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: September 6, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masaya Adachi, Miharu Otani, Jun Tanaka
  • Patent number: 8008852
    Abstract: An organic light-emitting display device is provided which achieves high efficiency by reducing the number of steps for vapor deposition using a mask with a fine pattern and photolithography. A blue light-emitting portion (B), a green light-emitting portion (G) and a red light-emitting portion (R) placed on a substrate 10 have a thickness relationship represented as (blue light-emitting portion (B)<green light-emitting portion (G)=red light-emitting portion (R)), so that the green light-emitting portion (G) and the red light-emitting portion are formed with common deposition steps. In addition, an electron injection layer 2 and an electron transport layer 3 between a lower electrode and an organic light-emitting layer 4 are formed with common depositions steps in the light-emitting portions (B, G and R).
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: August 30, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Sukekazu Aratani, Masao Shimizu, Toshiyuki Matsuura, Masahiro Tanaka, Masaya Adachi
  • Publication number: 20110194052
    Abstract: In a display device which includes: a first substrate; a second substrate; and a thin film polarizer which is directly formed on a surface of the second substrate on a side opposite to the first substrate, the thin film polarizer includes a polarization element film and a protection layer which is laminated to the polarization element film, the polarization element film is made of an aligned lyotropic liquid crystal material, and the protection layer has a refractive index smaller than a refractive index of the polarization element film in a transmission axis direction. The protection layer may have a thickness smaller than a thickness of polarization element film.
    Type: Application
    Filed: February 8, 2011
    Publication date: August 11, 2011
    Inventors: Takato Hiratsuka, Masaya Adachi, Hiroshi Sasaki, Miharu Otani
  • Patent number: 7977875
    Abstract: A light emitting display includes light-emitting devices in which unnecessary layers for the emission operation of the light-emitting device are removed in an emission region, and in a case where a wavelength of a light, of which an interference intensity to the light emitted from an emissive layer constituting the light-emitting device becomes a maximum value at 0 degree of a viewing angle, is ?imax and a wavelength of the light becoming a maximum in a light intensity in relation to the light emitted from the emissive layer is ?emax, a relationship of ?imax<?emax is satisfied, obtaining a light emitting display with a little variation in color over a wide range of viewing angles.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: July 12, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masaya Adachi, Toshihiro Sato, Naoki Tokuda
  • Publication number: 20110163333
    Abstract: A display device includes a plurality of pixels placed in a matrix form in which each pixel has a light emitting device. The light emitting device includes a light emissive layer; a reflective electrode disposed on a rear surface side of the light emissive layer; a transparent electrode disposed on a front surface side of the light emissive layer; a dividing wall, disposed between the reflective electrode and the light emissive layer at a periphery part of a region where the reflective electrode is formed; a protective layer on a front surface side of the transparent electrode; and a transparent substrate disposed above the protective layer. The protective layer and the transparent substrate are spaced from one another so as to delimit a space where a gas is sealed.
    Type: Application
    Filed: March 15, 2011
    Publication date: July 7, 2011
    Inventor: Masaya Adachi
  • Patent number: 7952663
    Abstract: In a transflective liquid crystal display device having a first substrate, a second substrate, a liquid crystal layer disposed between the two substrates and a reflective region and a transmissive region in each pixel; the second substrate has a pixel electrode to drive the liquid crystal layer and a common electrode; the reflective region of the second substrate is formed with an in-cell polarizer between the pixel electrode and common electrode and the reflector. In this invention, the thickness of the liquid crystal layer is set greater in the reflective region than in the transmissive region. The difference in the liquid crystal layer thickness between the reflective region and the transmissive region is provided by forming a step in the first substrate or the second substrate.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: May 31, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Chieko Araki, Masaya Adachi, Osamu Itou, Shoichi Hirota, Shinichiro Oka, Jun Tanaka, Miharu Otani
  • Publication number: 20110116021
    Abstract: A liquid crystal display device includes light source sections 150, a light guide plate 130 guiding light of the light source sections from a side edge and including a light emitting surface, and a liquid crystal panel 200 including a lower polarizer 230 opposed to the light emitting surface. The lower polarizer has a transmission axis generally along a light guide azimuth in which the light guide plate guides the light. The light guide plate includes a polarization converting section 131 on at least one of the light emitting surface and a rear surface. The polarization converting section reflects light made incident from the light guide azimuth in a different traveling azimuth and further reflects the light reflected in the different traveling azimuth to bring the traveling azimuth closer to the light guide azimuth to thereby convert polarization of the light traveling from the light guide azimuth.
    Type: Application
    Filed: November 10, 2010
    Publication date: May 19, 2011
    Inventors: Chieko Araki, Tatsuya Sugita, Masaya Adachi
  • Patent number: 7936422
    Abstract: An optical element is arranged in such a manner that a screen thereof can be hardly observed from a predetermined direction, and a deterioration of an image quality caused by moire does not occur. The optical element is constituted by a first polarizing layer, a second polarizing layer, and a liquid crystal layer arranged between these two polarizing layers. In the optical element, absorption axes of the first polarizing layer and the second polarizing layer are located parallel to each other; the liquid crystal layer is made of hybrid-aligned discotic liquid crystal; and an alignment axis of the liquid crystal layer is located parallel to, or perpendicular to both absorption axes of the first polarizing layer and of the second polarizing layer.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: May 3, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masaya Adachi, Osamu Itou, Shinichi Komura
  • Patent number: 7928639
    Abstract: A display device of the present invention has light-emitting devices making up a plurality of pixels placed in a matrix form. In the display device of the present invention, the light-emitting devices each possesses an emissive layer and a reflective element placed on the rear surface of the emissive layer; the emissive layer possesses at the said of the front side, a polarization separator which separates the light emitted from the emissive layer into two kinds of polarized components by the reflection and the transmission, and phase plate; the emissive layer substantially maintains the sate of the polarization of the light transmitted there-through; the reflective element at least reflects the circularly polarized light impinging in the vertical direction mainly as a circularly polarized light having a reverse helicity direction; and the polarization separator has a reflectance of the wavelength range from 520 nm to 600 nm smaller than a reflectance of range not more than 540 nm.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: April 19, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventor: Masaya Adachi
  • Patent number: 7905646
    Abstract: A light-guiding member is provided with two light source groups on its both terminals and the light-guiding board comprises two light mixing areas which have a cross section form which is symmetry for its center line, and a light outputting area between these. The light mixing areas function as an area in which the lights from each adjacent light source group are mixed and at the same time function as an area to output the mixed lights from each remote light source group. The light outputting area functions as an area to pass a part of the mixed lights from the two light source groups and at the same time functions as an area to output the rest.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: March 15, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masaya Adachi, Tatsuya Sugita
  • Publication number: 20110058128
    Abstract: An E-type polarizing layer is provided between a pair of orthogonally oriented O-type polarizing layers, and alternatively, an O-type polarizing layer and an E-type polarizing layer which are oriented orthogonal to each other are provided. When a liquid crystal layer has a slow axis, the E-type polarizing layer is disposed so that an absorption axis thereof is orthogonal to the slow axis. Therefore, a liquid crystal display device having a wide viewing angle is realized in which a contrast ratio is improved by suppressing a light leakage occurring when observed from an oblique direction.
    Type: Application
    Filed: August 20, 2010
    Publication date: March 10, 2011
    Inventors: Masaya Adachi, Takato Hiratsuka
  • Patent number: 7872414
    Abstract: A light-emitting device which is manufactured by a simple manufacturing method and which efficiently extracts light emitted from an emissive layer outward to improve the light extraction efficiency. The light-emitting device comprises a first electrode, a second electrode and an emissive layer disposed between them and extracts a part of light emitted from the emissive layer as radiated light. In this light-emitting device, the first electrode, the nano-structure layer for extracting the radiated light, and a gap having a refractive index lower than an average refractive index of the emissive layer and a nano-structure layer, are arranged in that order in a direction in which the radiated light is extracted.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: January 18, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tatsuya Sugita, Masaya Adachi, Hiroshi Sasaki