Patents by Inventor Hiroyuki Maru
Hiroyuki Maru 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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Patent number: 8436841Abstract: A display apparatus includes data lines, scanning lines arranged to cross the data lines, and pixel circuits aligning along the data lines and the scanning lines, such that one of the pixel circuits corresponds to each intersection between the data lines and the scanning lines. In addition, image signal lines transmit image signals, and switches connect the data lines to the image signal lines so that each of the data lines is connected to one of the image signal lines. The data lines are arranged such that adjacent data lines form a pair of data lines, and adjacent pairs of data lines are spaced apart from each other by two columns of pixel-circuits. Respective data lines of the pair of data lines are connected by the switches to two different image signal lines, and the switches connecting the pair of data lines to corresponding image signal lines are activated simultaneously.Type: GrantFiled: November 16, 2009Date of Patent: May 7, 2013Assignees: 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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Patent number: 8395570Abstract: A display apparatus includes a pixel circuit, a scanning line for supplying a scanning signal to the pixel circuit, a data line for supplying a data signal to the pixel circuit, and a shift register circuit having a number of stages, with every stage outputting the scanning signal to the scanning line. In addition, a first power supply supplies a voltage to the shift register circuit, and a second power supply supplies a voltage to the pixel circuit. After the first power supply is turned on, a constant level signal of either “H” or “L” is input into a terminal of the shift register circuit by clocks of the number of stages of the shift register such that every stage of the shift register outputs a same level signal before the second power supply is turned on.Type: GrantFiled: June 25, 2010Date of Patent: March 12, 2013Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Maru, Tatsuhito Goden, Fujio Kawano, Kouji Ikeda
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Patent number: 8183767Abstract: Provided is a display apparatus including multiple light emitting devices, in which each of the light emitting devices includes a reflective layer and a light emitting layer which are stacked, using interference between light directed from the light emitting layer to the reflective layer so as to be reflected by the reflective layer and light directed from the light emitting layer in the direction opposite to the reflective layer, and in which the multiple light emitting devices include a first light emitting device, a second light emitting device having a light emission color different from the first light emitting device, and a third light emitting device having the same emission spectrum as a spectrum in which light emission of the first light emitting device and light emission of the second light emitting device are mixed.Type: GrantFiled: July 3, 2008Date of Patent: May 22, 2012Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Maru, Osamu Yuki
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Patent number: 8076845Abstract: In a display apparatus, a thin film transistor, a planarization film, and at least two light-emitting devices are provided on a substrate, and the light-emitting device at least includes a light-emitting layer and first and second electrodes. At least two first contact holes and at least two second contact holes are provided in the planarization film at a part outside a display region and connect the first electrode to ground wiring and/or power wiring with a resistance lower than that of the first electrode, the distance between the second contact hole and the display region is longer than that between the first contact hole and the display region, and the opening area of the second contact hole is smaller than that of the first contact hole.Type: GrantFiled: December 8, 2009Date of Patent: December 13, 2011Assignee: Canon Kabushiki KaishaInventor: Hiroyuki Maru
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Publication number: 20110121738Abstract: A light-emitting apparatus includes a plurality of light-emitting devices which are connected in series and formed by alternately disposing electrodes and organic layers including a light-emitting material, wherein the electrodes include one electrode and another electrode disposed at an anode end and a cathode end of the light-emitting devices, respectively, and an intermediate electrode disposed between two of the organic layers which serves as a cathode of the light-emitting device disposed on a side of the anode end and as an anode of the light-emitting device disposed on a side of the cathode end; the intermediate electrode is connected to a drive circuit having two current output terminals connected in common; the drive circuit receives data signals concerning two of the plurality of light-emitting devices for which the intermediate electrode serves as the anode and the cathode, respectively; and the drive circuit outputs currents which are different in direction from each other from the two current outType: ApplicationFiled: June 19, 2009Publication date: May 26, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Fujio Kawano, Masami Iseki, Kohei Nagayama, Nobuhiko Sato, Toshihiko Mimura, Hiroyuki Maru, Yutaka Inaba
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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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Publication number: 20100141117Abstract: In a display apparatus, a thin film transistor, a planarization film, and at least two light-emitting devices are provided on a substrate, and the light-emitting device at least includes a light-emitting layer and first and second electrodes. At least two first contact holes and at least two second contact holes are provided in the planarization film at a part outside a display region and connect the first electrode to ground wiring and/or power wiring with a resistance lower than that of the first electrode, the distance between the second contact hole and the display region is longer than that between the first contact hole and the display region, and the opening area of the second contact hole is smaller than that of the first contact hole.Type: ApplicationFiled: December 8, 2009Publication date: June 10, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Hiroyuki Maru
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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: 20090009076Abstract: Provided is a display apparatus including multiple light emitting devices, in which each of the light emitting devices includes a reflective layer and a light emitting layer which are stacked, using interference between light directed from the light emitting layer to the reflective layer so as to be reflected by the reflective layer and light directed from the light emitting layer in the direction opposite to the reflective layer, and in which the multiple light emitting devices include a first light emitting device, a second light emitting device having a light emission color different from the first light emitting device, and a third light emitting device having the same emission spectrum as a spectrum in which light emission of the first light emitting device and light emission of the second light emitting device are mixed.Type: ApplicationFiled: July 3, 2008Publication date: January 8, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Hiroyuki Maru, Osamu Yuki
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Patent number: 7364272Abstract: A printing head which outputs an output from a sensor device provided for monitoring various condition of a printing head as digital data, and a printing apparatus using the printing head. The output from the device for detecting condition of the printing head, e.g., information indicative of a substrate temperature, a resistance value of an electrothermal transducer, an ON resistance value of a power transistor which drives the electrothermal transducer and the like is digitized on the substrate, and outputted as digital information to the outside. Further, the digital information is outputted by utilizing a clock signal and a latch signal used for transferring print data to the printing head. This does not increase the number of wires and the area of the substrate.Type: GrantFiled: April 15, 2005Date of Patent: April 29, 2008Assignee: Canon Kabushiki KaishaInventors: Tatsuo Furukawa, Hiroyuki Maru, Takashi Yoshida, Kazuki Ohta
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Patent number: 7101099Abstract: A printing head which outputs an output from a sensor device provided for monitoring various condition of a printing head as digital data, and a printing apparatus using the printing head. The output from the device for detecting condition of the printing head, e.g., information indicative of a substrate temperature, a resistance value of an electrothermal transducer, an ON resistance value of a power transistor which drives the electrothermal transducer and the like is digitized on the substrate, and outputted as digital information to the outside. Further, the digital information is outputted by utilizing a clock signal and a latch signal used for transferring print data to the printing head. This does not increase the number of wires and the area of the substrate.Type: GrantFiled: August 16, 1999Date of Patent: September 5, 2006Assignee: Canon Kabushiki KaishaInventors: Tatsuo Furukawa, Hiroyuki Maru, Takashi Yoshida, Kazuki Ohta
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Patent number: 6963615Abstract: A pixel modulation apparatus for converting pixel data D composed of N1 bits to a pixel data signal composed of one bit. The pixel data D is input into the apparatus at a pixel period T0. The apparatus includes a first data conversion unit which converts the pixel data D to pixel data D1 expanded to N2 bits (N2>N1) at the period T0, a second data conversion unit which converts the pixel data D1 to pixel data D2 composed of N3/m bits at a period T0/m, a third data conversion unit which inputs n data from among the pixel data D2 and pixel data Dd2 constituting the pixel data D2 before having the period T0/m to execute logical sum operations a predetermined number (equal to or less than n) of times to convert the n data to pixel data D3 composed of N3 bits, including additional data corresponding to the predetermined number, and a fourth data conversion unit which converts the pixel data D3 to the pixel data signal composed of one bit at the period T0/m.Type: GrantFiled: April 8, 2002Date of Patent: November 8, 2005Assignee: Canon Kabushiki KaishaInventors: Somei Kawasaki, Masami Iseki, Hiroyuki Maru, Fujio Kawano
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Publication number: 20050185023Abstract: A printing head which outputs an output from a sensor device provided for monitoring various condition of a printing head as digital data, and a printing apparatus using the printing head. The output from the device for detecting condition of the printing head, e.g., information indicative of a substrate temperature, a resistance value of an electrothermal transducer, an ON resistance value of a power transistor which drives the electrothermal transducer and the like is digitized on the substrate, and outputted as digital information to the outside. Further, the digital information is outputted by utilizing a clock signal and a latch signal used for transferring print data to the printing head. This does not increase the number of wires and the area of the substrate.Type: ApplicationFiled: April 15, 2005Publication date: August 25, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Tatsuo Furukawa, Hiroyuki Maru, Takashi Yoshida, Kazuki Ohta
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Patent number: 6860576Abstract: Power consumed by a resistor connected between a first power supply and a drive control circuit is controlled by a power driving circuit connected to a second power supply. When the value of current that flows into the resistor fluctuates, the value of current output from power driving circuit to a control terminal of the drive control circuit is controlled in such a manner that power consumed is the same as that when the resistance value of the resistor is a set value. As a result, the value of power consumed by the resistor is rendered substantially constant without being influenced by a variation in the resistance value of the driven resistor or by the power supply voltage. If such a drive circuit is used in driving the printhead of a printing apparatus, stabilized drive can be achieved with the minimum margin, power consumption can be suppressed and the lifetime of the printhead can be prolonged.Type: GrantFiled: June 17, 2003Date of Patent: March 1, 2005Assignee: Canon Kabushiki KaishaInventors: Somei Kawasaki, Hiroyuki Maru
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Patent number: 6755580Abstract: A printing head which outputs an output from a sensor device provided for monitoring various condition of a printing head as-digital data, and a printing apparatus using the printing head. The output from the device for detecting condition of the printing head, e.g., information indicative of a substrate temperature, a resistance value of an electrothermal transducer, an ON resistance value of a power transistor which drives the electrothermal transducer and the like is digitized on the substrate, and outputted as digital information to the outside. Further, the digital information is outputted by utilizing a clock signal and a latch signal used for transferring print data to the printing head. This does not increase the number of wires and the area of the substrate.Type: GrantFiled: August 30, 2002Date of Patent: June 29, 2004Assignee: Canon Kabushiki KaishaInventors: Tatsuo Furukawa, Hiroyuki Maru, Takashi Yoshida, Kazuki Ohta
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Publication number: 20040004647Abstract: Power consumed by a resistor connected between a first power supply and a drive control circuit is controlled by a power driving circuit connected to a second power supply. When the value of current that flows into the resistor fluctuates, the value of current output from power driving circuit to a control terminal of the drive control circuit is controlled in such a manner that power consumed is the same as that when the resistance value of the resistor is a set value. As a result, the value of power consumed by the resistor is rendered substantially constant without being influenced by a variation in the resistance value of the driven resistor or by the power supply voltage. If such a drive circuit is used in driving the printhead of a printing apparatus, stabilized drive can be achieved with the minimum margin, power consumption can be suppressed and the lifetime of the printhead can be prolonged.Type: ApplicationFiled: June 17, 2003Publication date: January 8, 2004Applicant: Canon Kabushiki KaishaInventors: Somei Kawasaki, Hiroyuki Maru
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Patent number: 6520611Abstract: In a print head of this invention, electricity-to-heat converters and a driver circuit for driving these electricity-to-heat converters in accordance with print data are formed on a single board. The board further includes an input/output interface circuit for receiving print data from an external apparatus, a CPU for controlling a printer apparatus, a ROM, a RAM, an A/D converter, a D/A converter, a timer, and the like, and also includes an external element driver for driving a mechanism portion of the printer apparatus.Type: GrantFiled: January 12, 2001Date of Patent: February 18, 2003Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Ishinaga, Junji Shimoda, Fumio Murooka, Tatsuo Furukawa, Hiroyuki Maru, Masaaki Izumida, Yoshinori Misumi
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Publication number: 20030002899Abstract: A printing head which outputs an output from a sensor device provided for monitoring various condition of a printing head as-digital data, and a printing apparatus using the printing head. The output from the device for detecting condition of the printing head, e.g., information indicative of a substrate temperature, a resistance value of an electrothermal transducer, an ON resistance value of a power transistor which drives the electrothermal transducer and the like is digitized on the substrate, and outputted as digital information to the outside. Further, the digital information is outputted by utilizing a clock signal and a latch signal used for transferring print data to the printing head. This does not increase the number of wires and the area of the substrate.Type: ApplicationFiled: August 30, 2002Publication date: January 2, 2003Inventors: Tatsuo Furukawa, Hiroyuki Maru, Takashi Yoshida, Kazuki Ohta
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Patent number: RE44825Abstract: The present invention is directed to resolve the noise problem with the ink in an ink jet head without changing the substrate manufacturing process for the ink jet head, that is, increasing the cost on the manufacture, and without needs of disposing a noise countermeasure component on the side of the printer main device, or making the design change for the countermeasure. The present invention is characterized in that to prevent malfunction from arising by the noise, a hysteresis circuit to provide different input data threshold values upon rising and falling is provided on an input portion of the signal for a drive control logic system such as a drive input signal for a shift register and a latch circuit on the same substrate as that of the heating elements, the driver and the drive control logic circuit, utilizing a diffusion layer constituting a driver.Type: GrantFiled: December 6, 2011Date of Patent: April 8, 2014Assignee: Canon Kabushiki KaishaInventors: Yoshiyuki Imanaka, Tatsuo Furukawa, Kimiyuki Hayasaki, Hiroyuki Maru, Masaaki Izumida