Patents by Inventor Tsuyoshi Maeda

Tsuyoshi Maeda 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: 7250995
    Abstract: The invention provides a liquid crystal display having uniform display and having a wide viewing angle despite the fact that the display includes active elements for switching pixels in the display area, and an electronic device including the same. Specifically, the invention is a transflective liquid crystal display, each dot of which has a reflective display area and a transmissive display area. The liquid crystal display can include an element substrate having a plurality of pixel electrodes, each pixel electrode being provided with a thin film diode (TFD) element, and an opposite substrate facing the element substrate. A reflective layer formed on the opposite substrate extends directly below the TFD element.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: July 31, 2007
    Assignee: Seiko Epson Corporation
    Inventor: Tsuyoshi Maeda
  • Patent number: 7251008
    Abstract: The invention provides a reflection type liquid crystal device, and a projection type display and electronic equipment in which display defects caused by disclination are reduced, minimized or prevented from being produced for a highly fine liquid crystal display with a space between pixels made to be narrow to make it possible to provide a high-contrast and bright display. A liquid crystal device includes a liquid crystal layer sandwiched between a first substrate and a second substrate, and a first electrode and a second electrode formed on a face of the above-described second substrate on a side of the above-described liquid crystal layer. The above-described first electrode and the above-described second electrode are formed so that an electric field substantially parallel to the surface of the substrate with respect to the above-described liquid crystal layer can be applied thereto.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: July 31, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Tsuyoshi Maeda, Kinya Ozawa, Osamu Okumura, Eiji Okamoto, Hirotaka Kawata, Toshiharu Matsushima, Takumi Seki, Kimitaka Kamijo
  • Publication number: 20070115404
    Abstract: A liquid crystal device includes a pair of substrates and a liquid crystal layer between the pair of substrates. In addition, the device includes a scattering reflective plate disposed between the liquid crystal layer and one of the pair of substrates, the scattering reflective plate having a light scattering surface, the scattering reflective plate reflecting 80% or more of impinging light into a 30° cone.
    Type: Application
    Filed: January 5, 2007
    Publication date: May 24, 2007
    Applicant: Seiko Epson Corporation
    Inventors: Osamu Okumura, Eiji Okamoto, Tsuyoshi Maeda, Toshiharu Matsushima
  • Publication number: 20070098277
    Abstract: An apparatus or system transmits a video signal of a screen of a PC or the like to a display such as a projector accurately at a high speed via a network. The apparatus or system includes a region determining unit comparing each block of a predetermined frame of a video signal composed of frames zone-divided into a predetermined number of blocks with each block corresponding to the block within an immediately preceding frame of the predetermined frame, and thereby determining a rectangular region including a region having a different pixel value; an extracting unit extracting a video signal included in (1) the determined rectangular region or (2) a rectangular region obtained from the determined rectangular region by applying a predetermined rule; and a transmitting unit transmitting the video signal extracted by the extracting unit.
    Type: Application
    Filed: March 9, 2004
    Publication date: May 3, 2007
    Inventors: Takashi Watanabe, Tsuyoshi Maeda
  • Publication number: 20070097298
    Abstract: The invention can provide a liquid crystal display device in which a homeotropic alignment liquid crystal layer is interposed between a pair of substrates and a trarsmissive display region and a reflective display region are provided in one dotregion. A liquid crystal layer thickness-adjusting layer for making the thickness of the liquid crystal layer in the reflective display region smaller than the thickness of the liquid crystal layer in the transmissive display region can be formed between at least one substrate of the pair of substrates and the liquid crystal layer, and wherein, in at least one substrate of the pair of substrates, convex portions that protrude from the internal surface of the substrate to the inside of the liquid crystal layer are formed in the transmissive display region in the dot region and in the region where the liquid crystal layer thickness-adjusting layer is formed outside the dot region.
    Type: Application
    Filed: December 13, 2006
    Publication date: May 3, 2007
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Tsuyoshi Maeda
  • Publication number: 20070098082
    Abstract: In an image processing method of sequentially loading, compressing, and transmitting images to thereby display the images, there is provided the image processing method capable of preventing the images from degradation while keeping the respondibility until the image is displayed. When a changed region is determined to be present, the image is compressed using a method with a high compression ratio, while when there is no changed region and a predetermined period of time elapses, the image is determined to be static to thereby be compressed using a method with a low compression ratio and very little distortion.
    Type: Application
    Filed: March 10, 2004
    Publication date: May 3, 2007
    Inventors: Tsuyoshi Maeda, Takashi Watanabe
  • Publication number: 20070091234
    Abstract: The invention can provide a liquid crystal display device in which a homeotropic alignment liquid crystal layer is interposed between a pair of substrates and a transmissive display region and a reflective display region are provided in one dotregion. A liquid crystal layer thickness-adjusting layer for making the thickness of the liquid crystal layer in the reflective display region smaller than the thickness of the liquid crystal layer in the transmissive display region can be formed between at least one substrate of the pair of substrates and the liquid crystal layer, and wherein, in at least one substrate of the pair of substrates, convex portions that protrude from the internal surface of the substrate to the inside of the liquid crystal layer are formed in the transmissive display region in the dot region and in the region where the liquid crystal layer thickness-adjusting layer is formed outside the dot region.
    Type: Application
    Filed: December 14, 2006
    Publication date: April 26, 2007
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Tsuyoshi Maeda
  • Publication number: 20070091233
    Abstract: The invention can provide a liquid crystal display device in which a homeotropic alignment liquid crystal layer is interposed between a pair of substrates and a transmissive display region and a reflective display region are provided in one dotregion. A liquid crystal layer thickness-adjusting layer for making the thickness of the liquid crystal layer in the reflective display region smaller than the thickness of the liquid crystal layer in the transmissive display region can be formed between at least one substrate of the pair of substrates and the liquid crystal layer, and wherein, in at least one substrate of the pair of substrates, convex portions that protrude from the internal surface of the substrate to the inside of the liquid crystal layer are formed in the transmissive display region in the dot region and in the region where the liquid crystal layer thickness-adjusting layer is formed outside the dot region.
    Type: Application
    Filed: December 14, 2006
    Publication date: April 26, 2007
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Tsuyoshi Maeda
  • Patent number: 7209197
    Abstract: The invention comprises a pair of substrates having electrodes on the opposing inner surfaces and forming a matrix-patterned dot group, liquid crystals sandwiched between said substrates, at least two colors of color filters, at least one polarizing plate, and a reflective plate. Also, of said color filters, at least one color of color filters has a transmissivity of 50% or more for the light of all the wavelengths in the range of 450 nm to 660 nm.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: April 24, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Osamu Okumura, Eiji Okamoto, Tsuyoshi Maeda, Toshiharu Matsushima
  • Publication number: 20070085862
    Abstract: A display device includes a first sub-pixel formed by a blue-type-hue colored area included in a visible light region whose hue changes in accordance with wavelength, a second sub-pixel formed by a red-type-hue colored area included in the visible light region, a third sub-pixel and a fourth sub-pixel formed by colored areas of two types of hues included in the visible light region, the two types of hues being selected from a hue range of from a blue hue to a yellow hue, and a plurality of pixels regularly disposed horizontally and vertically and each including the first to fourth sub-pixels. At least two of the four sub-pixels have different areas, and two of the four sub-pixels having smaller areas among the four sub-pixels are disposed so as not to be adjacent to each other.
    Type: Application
    Filed: September 7, 2006
    Publication date: April 19, 2007
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hidekuni MORIYA, Tsuyoshi MAEDA
  • Patent number: 7196760
    Abstract: The invention provides a reflection type liquid crystal device, and a projection type display and electronic equipment in which display defects caused by disclination are reduced, minimized or prevented from being produced for a highly fine liquid crystal display with a space between pixels made to be narrow to make it possible to provide a high-contrast and bright display. A liquid crystal device includes a liquid crystal layer sandwiched between a first substrate and a second substrate, and a first electrode and a second electrode formed on a face of the above-described second substrate on a side of the above-described liquid crystal layer. The above-described first electrode and the above-described second electrode are formed so that an electric field substantially parallel to the surface of the substrate with respect to the above-described liquid crystal layer can be applied thereto.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: March 27, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Tsuyoshi Maeda, Kinya Ozawa, Osamu Okumura, Eiji Okamoto, Hirotaka Kawata, Toshiharu Matsushima, Takumi Seki, Kimitaka Kamijo
  • Patent number: 7190427
    Abstract: The invention provides a thin reflective plate having cholesteric liquid crystal that can prevent or reduce a decrease of reflection efficiency. A reflective plate includes a cholesteric liquid crystal layer, and the cholesteric liquid crystal layer includes a plurality of regions in which the helical axes of the cholesteric liquid crystal are aligned in different directions in the plane of a substrate, and therefore, the regions can reflect color light components having different wavelengths. Consequently, the cholesteric liquid crystal layer can reflect light formed of light components of different colors (for example, white light) as a whole. When the reflective plate is applied to a reflective liquid crystal display device or the like, it is possible to appropriately reflect white light for display.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: March 13, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Tsuyoshi Maeda, Kimitaka Kamijo, Kinya Ozawa, Hitoshi Tsuchiya
  • Publication number: 20070015429
    Abstract: Provided is a method of manufacturing an electroluminescence device, in which a plurality of pixel forming regions is formed on a substrate, a light emitting element, in which an anode having a light transmission property, a light emission function layer including at least a light emitting layer and a cathode are laminated, is provided in each of the plurality of pixel forming regions, the pixel forming regions include a pixel forming region of first color and a pixel forming region of second color different from the first color, and the anode includes a first anode formed in the pixel forming region of the first color with a first thickness and a second anode formed in the pixel forming region of the second color with a second thickness, including: forming a first transparent conductive film in the pixel forming region of the first color with a thickness obtained by subtracting the second thickness from the first thickness; and forming a second transparent conductive film in the pixel forming region of the s
    Type: Application
    Filed: July 10, 2006
    Publication date: January 18, 2007
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tsuyoshi MAEDA, Tomotaka MATSUMOTO
  • Patent number: 7158197
    Abstract: The invention comprises a pair of substrates having electrodes on the opposing inner surfaces and forming a matrix-patterned dot group, liquid crystals sandwiched between said substrates, at least two colors of color filters, at least one polarizing plate, and a reflective plate. Also, of said color filters, at least one color of color filters has a transmissivity of 50% or more for the light of all the wavelengths in the range of 450 nm to 660 nm.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: January 2, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Osamu Okumura, Eiji Okamoto, Tsuyoshi Maeda, Toshiharu Matsushima
  • Patent number: 7148939
    Abstract: To achieve clear image display without providing a feeling of roughness by fixing the position where disclination is generated in a liquid crystal device of a homeotropic alignment type, a conductive light shielding film provided on the side of an opposed substrate as a common electrode to drive a liquid crystal layer by pixel electrodes of an array substrate and the light shielding film of the opposed substrate.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: December 12, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Tsuyoshi Okazaki, Kinya Ozawa, Tsuyoshi Maeda
  • Publication number: 20060274241
    Abstract: When a backlight 15 is turned on in a dark environment, white light emerging from the surface of a light guide plate 15b passes through a polarizer 12 and a retardation film 14, enters the interior of the liquid crystal cell, passes through openings of reflective electrodes 7, and is introduced into a liquid crystal layer 3. The light introduced into the liquid crystal layer 3 passes through a color filter 5, emerges from the liquid crystal cell, and passes through the retardation film 13 and the polarizer 11 towards the exterior. In a lighted environment, the light incident on the polarizer 11 passes through the liquid crystal layer 3, is reflected by the reflective electrode 7, and passes through the polarizer 11 again and is emitted towards the exterior.
    Type: Application
    Filed: July 13, 2006
    Publication date: December 7, 2006
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tsuyoshi MAEDA, Eiji OKAMOTO, Takumi SEKI, Osamu OKUMURA
  • Publication number: 20060268202
    Abstract: A reflective type color liquid crystal device can include a pair of substrates and a plurality of color filters with colors different from each other, all of the plurality of color filters having an average transmissivity of 70% to 90% for light of all wavelengths in a range of 450 nm to 660 nm. In addition, a reflective type color liquid crystal device can include a pair of opposing substrates, a liquid crystal layer between the substrates, a plurality of dots capable of independently applying voltage to the liquid crystal layer, each dot having a dot area that includes a first section and a second section, a color filter arranged in the first section, and a layer arranged in the second section where the color filter is not arranged, the layer being substantially transparent.
    Type: Application
    Filed: July 26, 2006
    Publication date: November 30, 2006
    Applicant: Seiko Epson Corporation
    Inventors: Osamu Okumura, Eiji Okamoto, Tsuyoshi Maeda, Toshiharu Matsushima
  • Patent number: 7139052
    Abstract: The invention provides a liquid crystal display device capable of displaying images with a wide angle in both of transmissive display and reflective display. In the liquid crystal display device, a liquid crystal layer can be interposed between a pair of substrates, and a transmissive display region and a reflective display region can be provided in one dot region. The liquid crystal layer is made of liquid crystal whose dielectric anisotropy showing that liquid crystal molecules are vertically aligned at an initial stage is negative. A liquid crystal layer thickness controlling layer for making the thickness of the liquid crystal layer in the reflective display region different from the thickness of the liquid crystal layer in the transmissive display region can be provided between the substrate and the liquid crystal layer.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: November 21, 2006
    Assignee: Seiko Epson Corporation
    Inventor: Tsuyoshi Maeda
  • Patent number: 7123313
    Abstract: To provide a highly reliable projection display device capable of being used for a long period of time without deterioration of a particular liquid crystal light valve, desirably, without any variation in color balance with time, even if a light source having a deviation of light intensity distribution is used. A projection display device in which a liquid crystal light valve includes a liquid crystal layer including TN liquid crystals having a twisted angle of substantially 90 degrees, with a polarization direction of a primary light LB incident upon the liquid crystal layer and an alignment direction of liquid crystal molecules disposed at a primary-light incident surface of the liquid crystal layer being substantially perpendicular to each other.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: October 17, 2006
    Assignee: Seiko Epson Corporation
    Inventor: Tsuyoshi Maeda
  • Publication number: 20060214573
    Abstract: A light emitting apparatus having light emitting devices having a stack of a light-transmitting anode, a functional layer including at least a light emitting layer, and a cathode for a plurality of pixels corresponding to red, green, and blue colors on a substrate, wherein an optical resonator having a lower-layer-side reflecting layer at a lower-layer side of the anode is formed in the light emitting device, wherein a plurality of the pixels include pixels which correspond to different thicknesses of a anode, and wherein a light-transmitting insulating protective film is formed between the anode and the lower-layer-side reflecting layer to cover the lower-layer-side reflecting layer.
    Type: Application
    Filed: February 21, 2006
    Publication date: September 28, 2006
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tsuyoshi Maeda, Tomotaka Matsumoto