Patents by Inventor Tatsuhito Goden
Tatsuhito Goden 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).
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Publication number: 20110316431Abstract: A display device includes a display unit in which display elements provided with pixel circuits are arranged so as to have a sequence of three different colors in a row direction and the colors are shifted in a column direction by 1.5 columns. A scanning line is provided in every row of the display unit, a signal line is provided in every column of the display unit, and a column control circuit outputs a display signal for every column. The positions of the pixel circuits are displaced in the row direction with respect to the arrangement of the display elements, and are thus aligned in the column direction and also connected to the signal line only on one side of the signal line. No inversion of the pixel circuit pattern occurs and variations of the circuit characteristics in every row are suppressed.Type: ApplicationFiled: August 31, 2011Publication date: December 29, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Somei Kawasaki, Masami Iseki, Tatsuhito Goden
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Patent number: 8026669Abstract: A display device includes a display unit in which display elements provided with pixel circuits are arranged so as to have a sequence of three different colors in a row direction and the colors are shifted in a column direction by 1.5 columns. A scanning line is provided in every row of the display unit, a signal line is provided in every column of the display unit, and a column control circuit outputs a display signal for every column. The positions of the pixel circuits are displaced in the row direction with respect to the arrangement of the display elements, and are thus aligned in the column direction and also connected to the signal line only on one side of the signal line. No inversion of the pixel circuit pattern occurs and variations of the circuit characteristics in every row are suppressed.Type: GrantFiled: March 30, 2007Date of Patent: September 27, 2011Assignee: Canon Kabushiki KaishaInventors: Somei Kawasaki, Masami Iseki, Tatsuhito Goden
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Publication number: 20110205210Abstract: In a display apparatus, after sampling switches turn on and a voltage signal to be held in a driving circuit is transmitted to a plurality of data lines and subsequently the sampling switches turn off, a selected scanning line supplies a control signal to the driving circuits along the selected scanning line, thereby causing the driving circuits to hold the voltage signal, and the plurality of scanning lines supply a control signal to the driving circuits simultaneously, and thereafter the sampling switches turn on and the voltage signal which is to cause the driving circuit to drive the display element is transmitted to the data lines thereby causing the driving circuits along the plurality of scanning lines to drive the display element simultaneously.Type: ApplicationFiled: February 18, 2011Publication date: August 25, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Takanori Yamashita, Tatsuhito Goden
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Patent number: 7939998Abstract: A display apparatus includes a first wiring disposed on one side of a periphery of a display part, a second wiring connecting a terminal to the first wiring, and a third wiring disposed in the display part. The third wiring extends between the one side where the terminal is located and an opposite side. The third wiring is connected to the first wiring. The first, second, and third wirings have resistances per unit length, R1, R2, and R3, respectively, which are set such that R2<R1<R3.Type: GrantFiled: May 13, 2009Date of Patent: May 10, 2011Assignee: Canon Kabushiki KaishaInventors: Takanori Yamashita, Masami Iseki, Tatsuhito Goden
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Patent number: 7911425Abstract: In a current driving display device, a first operation in which pixel circuits in odd rows are sequentially scanned to set a current supplied to display elements and a second operation in which pixel circuits in even rows are sequentially scanned to set a current supplied to display elements are alternately repeated. The current set in the pixel circuits is supplied to the display elements in parallel with the first and second operations, and the number of times in the period is twice or more than the number of times in which the pixel circuit sets a current supplied to the display element.Type: GrantFiled: March 30, 2007Date of Patent: March 22, 2011Assignee: Canon Kabushiki KaishaInventors: Tatsuhito Goden, Somei Kawasaki, Masami Iseki
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Publication number: 20110001689Abstract: A light emitting element is provided to allow for resetting a shift register while keeping a frame narrow without increasing complexity of a shift register circuit. A display apparatus has a data line, a scanning line, a pixel circuit, a shift register circuit, a first power supply supplying a voltage to the shift register circuit and a second power supply supplying a voltage to the pixel circuit. One end of the scanning line is connected to an output of the shift register circuit, and writing of a data signal from the data line to the pixel circuit can be controlled by a scanning signal from the scanning line. When the first power supply is on, any one of a high-level signal and a low-level signal is input into the shift register circuit for the number of stages of the shift register, and thereafter, the second power supply is turned on.Type: ApplicationFiled: June 25, 2010Publication date: January 6, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Hiroyuki Maru, Tatsuhito Goden, Fujio Kawano, Kouji Ikeda
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Publication number: 20100328365Abstract: A display apparatus includes: a light emitting element, a source which supplies a current to the light emitting element from a drain; a capacitor one end of which is connected to a gate of the transistor; a gate voltage setting circuit detachably connected to the gate of the transistor, the gate voltage setting circuit setting the gate voltage of the transistor to an initial voltage; and a capacitor terminal voltage setting circuit which is connected to another end of the capacitor, and which sets the voltage of the another end of the capacitor to any of data voltage corresponding to image information and constant reference voltage which does not depend on the image information, wherein a range, in which a current flowing through the light emitting element varies depending on the data voltage, is adjusted by changing one of the initial voltage and the reference voltage.Type: ApplicationFiled: June 7, 2010Publication date: December 30, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Kouji Ikeda, Masami Iseki, Fujio Kawano, Hiroyuki Maru, Tatsuhito Goden, Takanori Yamashita
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Patent number: 7852299Abstract: A display device includes a driving transistor for supplying driving current to a display element; a first switch connecting the driving transistor to a corresponding data line; a second switch selectively connecting a control electrode of the driving transistor to one of two main electrodes of the driving transistor; and a third switch connecting the driving transistor to the display element in one pixel. The first switch is controlled by a first control line. The second and third switches each include two switching elements connected in series controlled by the first control line and a second control line, respectively. Four functions of writing of data in the pixel, light emission of the display element by supplying current, non-light emission of the display element, and examination of the pixel operation can be switched using the two control lines.Type: GrantFiled: March 22, 2007Date of Patent: December 14, 2010Assignee: Canon Kabushiki KaishaInventors: Somei Kawasaki, Tatsuhito Goden
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Patent number: 7812812Abstract: A display device is driven by a driving method including a first drawing step of displaying an image by controlling a display medium on the basis of a first image signal, and a second drawing step of overwriting a handwritten image on the displayed image by controlling the display medium on the basis of a second image signal. In the first drawing step, an image is drawn by a reset drive for resetting a previous display image and a writing drive for writing an image, and in the second drawing step, the writing drive of a minimum or a substantially maximum luminance is performed without effecting the reset drive only in an area in which the handwritten image is written.Type: GrantFiled: March 24, 2004Date of Patent: October 12, 2010Assignee: Canon Kabushiki KaishaInventors: Hideki Yoshinaga, Hideo Mori, Tatsuhito Goden, Noriyuki Shikina
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Publication number: 20100128160Abstract: A display apparatus including: data lines; scanning lines arranged to cross the data lines; pixel circuits arranged along the data lines and the scanning lines, such that each of the pixel circuits corresponds to each of intersections between the data lines and the scanning lines; image signal lines for transmitting image signal; and switches, each arranged correspondingly to each of the data lines, for connecting each of the data lines to each one of the image signal lines, wherein the data lines are arranged such that adjacent two data lines are close to each other, and are connected simultaneously by the switches to different two of the image signal lines.Type: ApplicationFiled: November 16, 2009Publication date: May 27, 2010Applicants: CANON KABUSHIKI KAISHA, HITACHI DISPLAYS, LTD.Inventors: Hiroyuki Maru, Masami Iseki, Fujio Kawano, Tatsuhito Goden, Takanori Yamashita, Kouji Ikeda, Takeshi Izumida, Hiroshi Kageyama
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Publication number: 20100026677Abstract: A display apparatus includes two-dimensionally arranged light emitting devices driven by drive circuits, scanning lines and lighting lines connecting the drive circuits in a row direction, and data lines connecting the drive circuits in a column direction, wherein, in a programming scanning period for supplying signals to the data lines, sequentially selecting the scanning lines and setting the signals to the drive circuits connected to the selected scanning lines throughout all scanning lines, the light emitting scanning for sequentially selecting the lighting lines and supplying current corresponding to the signal set to the drive circuits from the drive circuit connected to the selected lighting lines to the light emitting device is performed at least twice, and the length of a period for supplying the currents from the drive circuits connected to the lighting lines to the light emitting devices varies every period of the light emitting scanning.Type: ApplicationFiled: June 17, 2008Publication date: February 4, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Noriyuki Shikina, Hideo Mori, Tatsuhito Goden, Somei Kawasaki, Masami Iseki
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Publication number: 20090284147Abstract: A display apparatus includes a first wiring disposed on one side of a periphery of a display part, a second wiring connecting a terminal to the first wiring, and a third wiring disposed in the display part. The third wiring extends between the one side where the terminal is located and an opposite side. The third wiring is connected to the first wiring. The first, second, and third wirings have resistances per unit length, R1, R2, and R3, respectively, which are set such that R2<R1<R3.Type: ApplicationFiled: May 13, 2009Publication date: November 19, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Takanori Yamashita, Masami Iseki, Tatsuhito Goden
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Patent number: 7605899Abstract: A display apparatus includes a display panel including pixels arranged in a matrix, pixel electrodes provided to the pixels, respectively, a common electrode provided commonly to the pixels, and scanning lines and signal lines for supplying a voltage to the pixel electrodes. In addition, a drive circuit is connected to the common electrode, the scanning lines, and the signal lines, and a control circuit provides a signal to the drive circuit. The control circuit selectively switches between a display drive mode in which an image is displayed on the display panel through sequential scanning of the scanning lines and application of a variable voltage to pixels via the signal lines by the drive circuit and a rewriting drive mode in which selected pixels are rewritten into black or white through application of a voltage, which is higher than a range of the variable voltage, to the selected pixels on a scanning line selected by the drive circuit.Type: GrantFiled: December 3, 2004Date of Patent: October 20, 2009Assignee: Canon Kabushiki KaishaInventors: Noriyuki Shikina, Hideo Mori, Hideki Yoshinaga, Tatsuhito Goden
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Publication number: 20090231239Abstract: In a current driving display device, a first operation in which pixel circuits in the odd rows are sequentially scanned to set a current supplied to display elements and a second operation in which pixel circuits in the even rows are sequentially scanned to set a current supplied to display elements are alternately repeated. The current set in the pixel circuits is supplied to the display elements in parallel with the first and the second operations, the number of times in the period is twice or more than the number of times in which the pixel circuit sets a current supplied to the display element. Flickers are suppressed.Type: ApplicationFiled: March 30, 2007Publication date: September 17, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Tatsuhito Goden, Somei Kawasaki, Masami Iseki
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Publication number: 20090109144Abstract: A circuit device includes a first circuit including a thin-film transistor and a second circuit including another thin-film transistor. The second circuit is controlled by control signals including a first control signal and a second control signal delayed from the first control signal. The second control signal is generated on the basis of the first control signal which has been propagated through the second circuit.Type: ApplicationFiled: October 23, 2008Publication date: April 30, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Tatsuhito Goden, Somei Kawasaki, Masami Iseki
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Publication number: 20090015571Abstract: During a first selection period, a second main conductive terminal of a drive transistor and a display element are isolated, and at the same time, a control terminal of the drive transistor and the second main conductive terminal and a signal line are connected, and the signal line is supplied with a constant current capable of conducting the drive transistor, and during a second selection period, a connection of the second main conductive terminal of the drive transistor and the signal line is broken, and the signal line is supplied with a signal current corresponding to a current injected to the display element, and during a non-selection period, the second main conductive terminal of the drive transistor and the display element are connected, and the drive current of the drive transistor corresponding to voltage between both terminals of a capacitive element is supplied to the display element.Type: ApplicationFiled: June 30, 2008Publication date: January 15, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Somei Kawasaki, Tatsuhito Goden
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Patent number: 7453201Abstract: In a display apparatus, second organic EL elements are closer to the edge of a display portion than first organic EL elements. The voltage drop in the first organic EL element is larger than that in the second organic EL element. The thickness of the organic compound layer in the first organic EL element is different from the thickness of the organic compound layer in the second organic EL element. The light-extraction efficiency in the first organic EL element is higher than the light-extraction efficiency in the second organic EL element.Type: GrantFiled: November 30, 2006Date of Patent: November 18, 2008Assignee: Canon Kabushiki KaishaInventors: Tatsuhito Goden, Somei Kawasaki, Masami Iseki
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Patent number: 7439949Abstract: A display apparatus includes a matrix display panel including scanning lines and signal lines disposed so as to form pixels each at an intersection of the scanning and signal lines, and a drive circuit for applying a voltage to the scanning and signal lines, the drive circuit generates a signal voltage depending on an image data inputted externally and applies the signal voltage to the signal lines while sequentially applying a selection voltage to the scanning line to effect writing of an image in the display panel. The drive circuit has a correction function of correcting a signal voltage depending on an image data in current image writing, at the time of image writing to the display panel, on the basis of a signal voltage in preceding image writing and an elapsed time from the preceding image writing, thereby to apply the corrected signal voltage to the signal lines.Type: GrantFiled: March 4, 2004Date of Patent: October 21, 2008Assignee: Canon Kabushiki KaishaInventors: Noriyuki Shikina, Hideo Mori, Hideki Yoshinaga, Tatsuhito Goden
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Patent number: 7432907Abstract: An electrophoretic display device includes a plurality of electrophoretic particles and an insulating liquid which are held in a container, a first electrode and a second electrode which are disposed close to the insulating liquid, and means for applying voltages between the first electrode and the second electrode. The electrophoretic display device exhibits a display state including a first state in which the electrophoretic particle are dispersed in the insulating liquid by applying an AC voltage between the first and second electrodes, a second state in which the electrophoretic particles are attracted toward the first electrode by applying a DC voltage of one polarity between the first and second electrodes, and third state in which the electrophoretic particles are attracted toward by applying a DC voltage of the other polarity between the first and second electrodes. The second and third states are exhibited alternately.Type: GrantFiled: March 3, 2004Date of Patent: October 7, 2008Assignee: Canon Kabushiki KaishaInventor: Tatsuhito Goden
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Publication number: 20070229412Abstract: A display device includes a driving transistor for supplying driving current to a display element; a first switch connecting the driving transistor to a corresponding data line; a second switch selectively connecting a control electrode of the driving transistor to one of two main electrodes of the driving transistor; and a third switch connecting the driving transistor to the display element in one pixel. The first switch is controlled by a first control line. The second and third switches each include two switching elements connected in series controlled by the first control line and a second control line, respectively. Four functions of writing of data in the pixel, light emission of the display element by supplying current, non-light emission of the display element, and examination of the pixel operation can be switched using the two control lines.Type: ApplicationFiled: March 22, 2007Publication date: October 4, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Somei Kawasaki, Tatsuhito Goden