Patents by Inventor Tomoyuki Shirasaki

Tomoyuki Shirasaki 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: 7907105
    Abstract: A display apparatus includes: a light-emitting device; a pixel circuit which is connected to the light-emitting device; a display driver having a voltage adjustment section which adjusts the potential of an adjustment voltage such that the potential thereof is approximated to a potential which is changed in accordance with the change amount of the characteristics inherent to the pixel circuit when a reference current having a predetermined current value is supplied to the pixel circuit; and a data line which connects the display driver and pixel circuit.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: March 15, 2011
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tomoyuki Shirasaki, Jun Ogura
  • Patent number: 7898507
    Abstract: A display device which displays image information based on display data comprising a display panel having a plurality of signal lines and scanning lines with a plurality of display pixels containing current control type light emitting devices; a scan driver circuit applies a scanning signal to each of the scanning lines and sets the display pixels connected to the scanning lines in a selective state; a signal driver circuit generates gradation current based on the display data luminosity gradation component and supplies to the display pixels set in the selective state; a precharge circuit applies a precharge voltage to each signal line and sets a capacity component attached to each of the scanning lines in a predetermined charged state; and an operation control circuit controls setting of the light emitting devices in a non-light emitting state when the capacity component is set in a predetermined charged state.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: March 1, 2011
    Assignee: Casio Computer Co., Ltd.
    Inventors: Manabu Takei, Tomoyuki Shirasaki, Ikuhiro Yamaguchi, Tsuyoshi Ozaki, Jun Ogura
  • Patent number: 7896722
    Abstract: A partitioning wall is formed on one surface of a substrate. The partitioning wall has a lattice-like shape and defines a plurality of surrounded-regions. Each of the surrounded-regions is surrounded by the partitioning wall and includes a plurality of pixel-regions on which pixels are to be formed. A first predetermined region of the substrate adjacent to a part of the partitioning wall is maintained at a higher temperature, and a second predetermined region other than the first predetermined region is maintained at a lower temperature. Liquid which contains a carrier transporting material is coated on the pixel-regions in the surrounded-regions while maintaining the temperatures of the substrate.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: March 1, 2011
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tomoko Tano, Tomoyuki Shirasaki
  • Patent number: 7887877
    Abstract: At a first timing, an ink jetting unit of a printer head coats an aqueous ink or an organic solvent ink on pixel forming regions on a panel substrate. At a second timing, a first infrared light source unit or a second infrared light source unit disposed adjacently to the ink jetting unit radiates infrared light to the aqueous ink or the organic solvent ink coated on the pixel forming regions to heat the ink and vaporize and dry the solvent in the aqueous ink or the organic solvent ink to fix a hole transporting material or an electron transporting material on the panel substrate.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: February 15, 2011
    Assignee: Casio Computer Co., Ltd.
    Inventors: Kazunori Morimoto, Tomoyuki Shirasaki
  • Patent number: 7871837
    Abstract: A display panel manufacturing method according to one aspect of the present invention comprises: patterning a plurality of pixel electrodes on a panel to be arrayed in a matrix; forming an interconnection made of a metal between the pixel electrodes; coating a surface of the interconnection with a liquid repellent conductive layer; and forming an organic compound layer by applying an organic compound-containing solution to the electrodes.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: January 18, 2011
    Assignee: Casio Computer Co., Ltd.
    Inventors: Satoru Shimoda, Tomoyuki Shirasaki, Jun Ogura, Minoru Kumagai
  • Patent number: 7864167
    Abstract: A display device that displays image information in response to a digital display signal includes a display panel signal lines and scanning lines which intersect at right angles with each other, and a plurality of display pixels with optical elements arranged near the intersecting points of the signal lines and scanning lines. A signal driver circuit has a plurality of current generation circuits including a drive current generation circuit for generating drive current from a plurality of gradation currents based on the display signal value supplied to each of the scanning lines, a scanning driver circuit for sequentially applying a scanning signal to each of the scanning lines for setting the selection state of each line of each display pixel, and a gradation current generation circuit for generating gradation currents according to each display signal bit at least based on a constant predetermined reference current.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: January 4, 2011
    Assignee: Casio Computer Co., Ltd.
    Inventors: Katsuhiko Morosawa, Tomoyuki Shirasaki
  • Patent number: 7855699
    Abstract: A display device includes a display panel having rows of scanning lines and columns of data lines; and a matrix of display pixels near intersections of the scanning lines and the data line. A scanning driver circuit which selects display pixels of rows connected to some of the scanning lines, and a signal driver generates display data for each display pixel. The display panel has scanning line groups which constitute sets of scanning lines through which simultaneous selection is performed by the scanning driver circuit; a plurality of scanning signal lines connected to each of the scanning line groups; and a plurality of data line groups which constitute sets of the data lines corresponding to a line count of the display pixels of the rows connected to each of the scanning line groups within the data lines.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: December 21, 2010
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tomoyuki Shirasaki, Manabu Takei
  • Patent number: 7830084
    Abstract: A display panel including a plurality of pixels. Each pixel includes: a light emitting element; a pixel circuit having a driving transistor connected to the light emitting element in series; a data line to which a data current is supplied through the pixel circuit; a scanning line for selecting the pixel circuit; a first insulation film to cover the data line; and a second insulation film made of a material different from the first insulation film, to cover the data line and the first insulation film, wherein the following expression is satisfied. C total 20 ? ? 0 ? ? a ? ? b ? a ? D b + ? b ? D a ? C total 5 Ctotal: parasitic capacitance of whole path to data line through pixel circuit; ?0: vacuum dielectric constant; ?a: relative dielectric constant of first insulation film; Da: first insulation film thickness; ?b: relative dielectric constant of second insulation film; Db: second insulation film thickness.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: November 9, 2010
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tomoyuki Shirasaki, Minoru Kumagai, Hiroyasu Yamada, Tsuyoshi Ozaki, Jun Ogura
  • Patent number: 7732019
    Abstract: A solution spray apparatus includes a nozzle which sprays a droplet of a solution such as EL solution, a heater is provided on the nozzle to heat the solution in the nozzle to a temperature lower than a boiling point of the solution in the nozzle, so that the droplet of the heated solution is ejected from the spray to an object.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: June 8, 2010
    Assignee: Casio Computer Co., Ltd.
    Inventors: Satoru Shimoda, Tomoyuki Shirasaki
  • Publication number: 20100051993
    Abstract: Disclosed is a light emitting apparatus including: a first electrode; at least one carrier transporting layer on the first electrode; a second electrode on the carrier transporting layer; a partition wall formed on an upper face side of a substrate the partition wall including an opening to be communicated with the first electrode; and a light emitting protecting layer mediating between the partition wall and the carrier transporting layer.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 4, 2010
    Applicant: CASIO COMPUTER CO., LTD.
    Inventors: Satoru SHIMODA, Tomoyuki SHIRASAKI, Takashi KIDU
  • Patent number: 7663615
    Abstract: A light emission drive circuit includes an electric charge accumulating section for accumulating electric charges on the basis of a gradation sequence signal designating a luminance gradation sequence. A light emission control section flows a light emission drive current having a current value in accordance with an amount of the electric charges accumulated in the electric charge accumulating section. A writing control section controls a supplying state of the electric charges based on the gradation sequence signal to the electric charge accumulating section on the basis of a first control signal. A voltage control section controls a drive voltage for operating the light emission controlling section on the basis of a second control signal.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: February 16, 2010
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tomoyuki Shirasaki, Jun Ogura
  • Publication number: 20090243482
    Abstract: A display device comprising: a light-emitting element formed on a substrate; a driver element formed on the substrate, that controls a current flowing in the light-emitting element; a switching element that switches the driver element; and a light-blocking film formed so as to correspond to only the switching element.
    Type: Application
    Filed: March 26, 2009
    Publication date: October 1, 2009
    Applicant: Casio Computer Co., Ltd.
    Inventors: Tadahisa TOHYAMA, Tomoyuki Shirasaki, Tomomi Sawano, Tsuyoshi Ozaki
  • Publication number: 20090239321
    Abstract: A transistor array substrate includes a plurality of driving transistors which are arrayed in a matrix on a substrate. The driving transistor has a gate, a source, a drain, and a gate insulating film inserted between the gate, and the source and drain. A plurality of signal lines are patterned together with the gates of the driving transistors and arrayed to run in a predetermined direction on the substrate. A plurality of supply lines are patterned together with the sources and drains of the driving transistors and arrayed to cross the signal lines via the gate insulating film. The supply line is electrically connected to one of the source and the drain of the driving transistor. A plurality of feed interconnections are formed on the supply lines along the supply lines, respectively.
    Type: Application
    Filed: June 3, 2009
    Publication date: September 24, 2009
    Applicant: Casio Computer Co., Ltd.
    Inventors: Satoru SHIMODA, Tomoyuki Shirasaki, Jun Ogura, Minoru Kumagai
  • Publication number: 20090220679
    Abstract: A method of manufacturing a display apparatus including an optical element having an optical material layer between a first electrode and a second electrode which are formed on a substrate, includes an aligning step of making the substrate oppose a plate which has a wettability changeable layer and to which a droplet of an optical material containing liquid sticks in accordance with a pattern based on a difference in wettability. The substrate and the plate are aligned with each other, and the droplet is bring into contact with the substrate to transfer the droplet to the substrate side, thereby forming the optical material layer.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 3, 2009
    Applicant: Casio Computer Co., Ltd.
    Inventors: Minoru Kumagai, Tomoyuki Shirasaki
  • Patent number: 7583261
    Abstract: A predetermined voltage is supplied to a voltage supply line connected in common to respective current paths of driving elements of each of a plurality of display pixels. Adjustment voltages based on a predetermined unit voltage are sequentially applied to a plurality of data lines connected to the display pixels. Specific values corresponding to element characteristics of the respective driving elements of the display pixels are sequentially detected based on a value of a detection value that is a potential difference between a data line and the voltage supply line or a value of a current flowing into the voltage supply line. Correction gradation voltages are generated for each pixel by correcting a gradation voltage having a voltage value corresponding to display data for the pixel based on the specific value for the pixel, so as to compensate for characteristic fluctuation of the driving element of the pixel.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: September 1, 2009
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tomoyuki Shirasaki, Jun Ogura
  • Patent number: 7580014
    Abstract: A display apparatus includes a substrate, a plurality of pixel electrodes which are arrayed on a side of one surface of the substrate, EL layers each of which is formed on a corresponding one of the pixel electrodes, and an counter electrode which is formed on the EL layers. An auxiliary electrode is electrically connected to the counter electrode and overlaps portions between the pixel electrodes.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: August 25, 2009
    Assignee: Casio Computer Co., Ltd.
    Inventors: Yukikazu Tanaka, Tomoyuki Shirasaki
  • Patent number: 7580011
    Abstract: A current generation supply circuit which supplies drive currents corresponding to digital signals for a plurality of loads comprising a current generation circuit which supplies output currents to the loads as the drive currents comprising a reference voltage generation circuit in which reference current having a constant current value is supplied and generates reference voltages based on the reference current; a drive current generation circuit which generates the output currents having current value ratios corresponding to the digital signals relative to the reference current based on the reference voltages; and a characteristic control circuit which sets the ratio of the output currents relative to the reference current.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: August 25, 2009
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tsuyoshi Toyoshima, Tomoyuki Shirasaki, Katsuhiko Morosawa
  • Publication number: 20090207160
    Abstract: A display drive apparatus for driving a display pixel including a light-emitting element and a drive element in which one end of a current path is connected to the light-emitting element. The display drive apparatus has a specific value detection section detecting a difference value between a measured voltage detected at one end of a data line when a reference current is applied via the data line and a standard voltage corresponding to the reference current so as to obtain a specific value corresponding to variation of an element characteristic of the drive element, and a gradation signal correction section generating a corrected gradation signal by correcting a gradation signal according to display data based on the specific value so as to apply the corrected gradation signal from the one end of the data line to the display pixel.
    Type: Application
    Filed: February 11, 2009
    Publication date: August 20, 2009
    Applicant: Casio Computer Co., Ltd.
    Inventors: Tomoyuki SHIRASAKI, Jun Ogura, Satoru Shimoda
  • Patent number: 7576358
    Abstract: A display panel includes a plurality of sets of transistors which are formed on an upper side of a substrate. An insulating film is formed to cover upper surfaces of the transistors and has a plurality of trenches formed in an upper surface thereof. A plurality of first interconnections are buried in the trenches. An interconnection insulating film covers upper surfaces of the first interconnections. A plurality of second interconnections are provided on an upper side of the interconnection insulating film. Each of a plurality of pixel electrodes is provided between two adjacent interconnections of the second interconnections. Each of a plurality of light-emitting layers is provided on one of the pixel electrodes. A counter electrode is provided on the light-emitting layers.
    Type: Grant
    Filed: September 22, 2005
    Date of Patent: August 18, 2009
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tomoyuki Shirasaki, Tadahisa Tohyama, Jun Ogura
  • Patent number: 7573068
    Abstract: A transistor array substrate includes a plurality of driving transistors which are arrayed in a matrix on a substrate. The driving transistor has a gate, a source, a drain, and a gate insulating film inserted between the gate, and the source and drain. A plurality of signal lines are patterned together with the gates of the driving transistors and arrayed to run in a predetermined direction on the substrate. A plurality of supply lines are patterned together with the sources and drains of the driving transistors and arrayed to cross the signal lines via the gate insulating film. The supply line is electrically connected to one of the source and the drain of the driving transistor. A plurality of feed interconnections are formed on the supply lines along the supply lines, respectively.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: August 11, 2009
    Assignee: Casio Computer Co., Ltd.
    Inventors: Satoru Shimoda, Tomoyuki Shirasaki, Jun Ogura, Minoru Kumagai