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: 20080239210
    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: Application
    Filed: January 25, 2008
    Publication date: October 2, 2008
    Inventors: Chieko Araki, Masaya Adachi, Osamu Itou, Shoichi Hirota, Schinichiro Oka, Jun Tanaka, Miharu Otani
  • Patent number: 7425794
    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: July 7, 2005
    Date of Patent: September 16, 2008
    Assignee: Hitachi Displays, Ltd.
    Inventor: Masaya Adachi
  • Publication number: 20080218461
    Abstract: A liquid crystal display device in which: there are provided lenticular lenses 1 and color separation filters, associated with a subpixel row direction, on the backlight 59 side with respect to lenticular lenses 1; and there are arranged, in a RGW row, a color separation filter 19B reflecting B wavelengths, and in a GBW row, a color separation filter 19R reflecting R wavelengths; wherein, together with collecting light in transmissive aperture parts 15 with lenticular lenses 1 and improving the transmitted quantity of light, the light reflected by color separation filters 19 is returned to backlight 59 and reutilized.
    Type: Application
    Filed: January 24, 2008
    Publication date: September 11, 2008
    Inventors: Tatsuya Sugita, Masaya Adachi, Shoichi Hirota
  • Publication number: 20080165307
    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: Application
    Filed: January 7, 2008
    Publication date: July 10, 2008
    Inventors: Masaya Adachi, Tatsuya Sugita
  • Patent number: 7394095
    Abstract: In the present invention, a lower electrode is utilized as a photomask to form a liquid-repellent region having a generally same pattern shape as that of the lower electrode and a liquid-attracting region having a generally reversed pattern shape on an insulating film. A conductive ink is coated and calcined in the liquid-attracting region to form an upper electrode having a generally reversed pattern shape to the lower electrode in a self-aligned manner, eliminating the occurrence of misregistration even when a printing method is used. Consequently, semiconductor devices such as an active matrix thin film transistor substrate can be formed using a printing method.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: July 1, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Ando, Masaya Adachi, Hiroshi Sasaki, Masatoshi Wakagi
  • Patent number: 7391568
    Abstract: A liquid crystal display apparatus including: a liquid crystal display element having a liquid crystal layer; a backlight apparatus arranged at one side of the couple of substrates of the liquid crystal display element; a polarizer arranged between the liquid crystal display element and the backlight apparatus; a luminous intensity distribution control element arranged at the other side of the couple of substrates of the liquid crystal display element; an analyzer arranged between the liquid crystal display element and the luminous intensity distribution control element, wherein the luminous intensity distribution control element comprises a transparent base member, a plural lenses arranged on the transparent base member, and a light absorbing layer having small opening portions substantially at focal positions of an individual lens of the plural lenses, and the transparent base member is constituted of a transparent body substantially optically isotropic or a transparent body having uniaxial optical anisotro
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: June 24, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Masaya Adachi, Makoto Tsumura, Ikuo Hiyama, Tetsuro Minemura
  • Publication number: 20080143253
    Abstract: Light-emitting devices (24) and light-emitting displays (1) for realizing bright display by allowing light emitted from an emissive layer (100) to efficiently contribute to a display. Polarization separators (500) are arranged between the emissive layer (100) and a phase plate (700). In the light of a wavelength range which includes a part or all of a light-emission wavelength range of the emissive layer and is narrower than a visible wavelength range and is directed from the emissive layer side to the polarization separators side, the polarization separators (500) reflect circularly polarized light components which are converted into linearly polarized light that is absorbed by the polarizer (600) due to the operation of the phase plate and transmit the other light.
    Type: Application
    Filed: December 31, 2007
    Publication date: June 19, 2008
    Inventors: Masaya Adachi, Yoshiyuki Kaneko, Sukekazu Aratani, Shingo Ishihara
  • Publication number: 20080143939
    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: Application
    Filed: December 11, 2007
    Publication date: June 19, 2008
    Inventors: Masaya Adachi, Chieko Araiki, Jun Tanaka, Miharu Otani, Osamu Itou, Shinichiro Oka
  • Publication number: 20080106676
    Abstract: In a transflective type IPS type liquid crystal display device in which a phase difference layer has been built in a reflection display portion, a retardation value of the phase difference layer corresponding to a short wavelength color filter is different from a retardation value of the phase difference layer corresponding to a long wavelength color filter; while a blue display pixel is set to the short wavelength color filter and both red and green pixels are set to the long wavelength filter, the retardation value of the phase difference layer corresponding to the former-mentioned short wavelength color filter is made smaller than the retardation value of the phase difference layer corresponding to the latter-mentioned long wavelength color filter.
    Type: Application
    Filed: November 6, 2007
    Publication date: May 8, 2008
    Inventors: Osamu Itou, Shoichi Hirota, Masaya Adachi, Shinichiro Oka
  • Publication number: 20080084376
    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 10, 2007
    Publication date: April 10, 2008
    Inventors: Shoichi Hirota, Shinichi Komura, Yoshifumi Sekiguchi, Tsunenori Yamamoto, Masaya Adachi
  • Publication number: 20080084517
    Abstract: In a liquid crystal display device, rays of light of a light source for blue light emission are concentrated on a fluorescent material by using a lens of a first micro-lens array and fluorescent rays from the fluorescent material are concentrated on a pixel of corresponding color by using a lens of a second micro-lens array.
    Type: Application
    Filed: October 10, 2007
    Publication date: April 10, 2008
    Inventors: Osamu Itou, Tatsuya Sugita, Masaya Adachi, Shinichi Komura, Shoichi Hirota
  • Patent number: 7339316
    Abstract: Light-emitting devices and light-emitting displays for realizing bright display by allowing light emitted from an emissive layer to efficiently contribute to a display. Polarization separators are arranged between the emissive layer and a phase plate. In the light of a wavelength range which includes a part or all of a light-emission wavelength range of the emissive layer and is narrower than a visible wavelength range and is directed from the emissive layer side to the polarization separators side, the polarization separators reflect circularly polarized light components which are converted into linearly polarized light that is absorbed by the polarizer due to the operation of the phase plate and transmit the other light.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: March 4, 2008
    Assignee: Hitachi, Ltd
    Inventors: Masaya Adachi, Yoshiyuki Kaneko, Sukekazu Aratani, Shingo Ishihara
  • Publication number: 20080030132
    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: Application
    Filed: September 7, 2007
    Publication date: February 7, 2008
    Applicant: HITACHI DISPLAYS, LTD.
    Inventors: Masaya Adachi, Kazutaka Tsuji, Hajime Murakami, Etsuko Nishimura
  • Publication number: 20080030129
    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: Application
    Filed: August 3, 2007
    Publication date: February 7, 2008
    Inventors: Sukekazu Aratani, Masao Shimizu, Toshiyuki Matsuura, Masahiro Tanaka, Masaya Adachi
  • Publication number: 20080007155
    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: Application
    Filed: September 13, 2007
    Publication date: January 10, 2008
    Applicant: HITACHI DISPLAYS, LTD.
    Inventor: Masaya ADACHI
  • Publication number: 20070285410
    Abstract: An illuminating device includes a light-condensing sheet, a light-emitting portion, and a control unit. The light-condensing sheet includes a plurality of lenses each with a light-condensing function ranged on a light transmittance substrate. The light-emitting portion is opposed to the light-condensing sheet and includes light-emitting areas with respective dimensions. The control unit switches a luminous state of the light-emitting area to a non-luminous state or vice versa. A display device is provided with the illuminating device described above.
    Type: Application
    Filed: June 6, 2007
    Publication date: December 13, 2007
    Inventors: Toshinari Shibasaki, Hideo Homma, Katsusuke Shimazaki, Masaya Adachi, Sukekazu Aratani
  • Patent number: 7301274
    Abstract: An active matrix type organic light emitting diode display serving as a bottom emission type device coupling out emission of an organic electroluminescence layer from a substrate where thin film transistors are formed or as a top emission type device coupling out the emission on the opposite side to the substrate. In a suitable layer (102, 106, 107) in each device, an insulating film containing SiO is formed. The insulating film is porous with nano pores in the film. The porous insulating film is controlled as to film density, film refractive index, nano pore diameter in film, average nano pore diameter in film and maximum nano pore diameter in film so that the refractive index is lower than that of a transparent electrode or a transparent substrate of the display holding the organic electroluminescence layer therebetween, and nano pores are present in the film.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: November 27, 2007
    Assignee: Hitachi Displays, Ltd.
    Inventors: Jun Tanaka, Kiyoshi Ogata, Masaya Adachi, Miharu Otani
  • Publication number: 20070262708
    Abstract: An active matrix type organic light emitting diode display serving as a bottom emission type device coupling out emission of an organic electroluminescence layer from a substrate where thin film transistors are formed or as a top emission type device coupling out the emission on the opposite side to the substrate. In a suitable layer (102, 106, 107) in each device, an insulating film containing SiO is formed. The insulating film is porous with nano pores in the film. The porous insulating film is controlled as to film density, film refractive index, nano pore diameter in film, average nano pore diameter in film and maximum nano pore diameter in film so that the refractive index is lower than that of a transparent electrode or a transparent substrate of the display holding the organic electroluminescence layer therebetween, and nano pores are present in the film.
    Type: Application
    Filed: July 19, 2007
    Publication date: November 15, 2007
    Inventors: Jun Tanaka, Kiyoshi Ogata, Masaya Adachi, Miharu Otani
  • Patent number: 7291973
    Abstract: An organic light-emitting display is provided which includes an organic electroluminescent (EL) substrate, a drive layer formed on the substrate, a first electrode formed on the drive layer; organic layers formed on the first electrode, a second electrode formed on the organic layers, and a plurality of pixels. A counter substrate is formed adjacent the organic EL substrate, and a light extraction layer is formed between the substrate and the counter substrate. Each of the pixels includes sub-pixels and is disposed such that an auxiliary electrode of the second electrode is disposed in a part of one of the sub-pixels. The auxiliary electrode is formed on a same level as the first electrode and is connected to a current supply line within the drive layer via a contact hole formed in an inter-layer insulating layer formed over the drive layer.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: November 6, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Shingo Ishihara, Sukekazu Aratani, Masaya Adachi
  • Patent number: 7279833
    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: February 23, 2006
    Date of Patent: October 9, 2007
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masaya Adachi, Kazutaka Tsuji, Hajime Murakami, Etsuko Nishimura