Patents by Inventor Takayuki Shu
Takayuki Shu 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: 10248436Abstract: An electronic apparatus that is capable of checking connection between the electronic apparatus body and accessories without performing communication between the electronic apparatus body and accessories. The electronic apparatus is capable of communicating with an accessory device connected. A detection unit detects whether the accessory device supports both a first communication method and a second communication method of which communication speed is higher than communication speed of the first communication method. A setting unit sets the second communication method during communication when the detection unit detects that the accessory device supports both the first communication method and the second communication method, and to set the first communication method except communicating.Type: GrantFiled: August 18, 2016Date of Patent: April 2, 2019Assignee: CANON KABUSHIKI KAISHAInventor: Takayuki Shu
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Publication number: 20180302580Abstract: An image pickup apparatus is capable of reducing saturation of a photoelectric conversion part at a time of photometry. The image pickup apparatus includes a photographing lens and an image pickup device including the following units. A photoelectric conversion part generates an electric charge by converting incident light through the lens photoelectrically and can accumulate the generated electric charge. A transfer switch transfers the electric charge to a charge accumulation part from the photoelectric conversion part. A control unit selectively sets a driving mode from among a first driving mode in which the electric charge generated by the photoelectric conversion part is intermittently transferred to the charge accumulation part by switching ON/OFF of the transfer switch and a second driving mode in which the electric charge generated by the photoelectric conversion part is continuously transferred to the charge accumulation part by keeping an ON state of the transfer switch.Type: ApplicationFiled: April 2, 2018Publication date: October 18, 2018Inventor: Takayuki Shu
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Publication number: 20170094207Abstract: A focus detection apparatus comprises a line sensor including a photoelectric conversion element and an integrating capacitor, a storage unit configured to store information concerning a defective pixel, a first comparison unit configured to compare a signal from the defective pixel with a predetermined threshold, a switching unit configured to switch between a first accumulation mode and a second accumulation mode, and a control unit configured to control the switching unit so as to set the line sensor in the first accumulation mode if the first comparison unit determines that a signal from the defective pixel is not more than the predetermined threshold and set the line sensor in the second accumulation mode if the first comparison unit determines that a signal from the defective pixel is larger than the threshold.Type: ApplicationFiled: December 8, 2016Publication date: March 30, 2017Inventors: Takayuki Shu, Takashi Ichimiya
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Publication number: 20170052797Abstract: An electronic apparatus that is capable of checking connection between the electronic apparatus body and accessories without performing communication between the electronic apparatus body and accessories. The electronic apparatus is capable of communicating with an accessory device connected. A detection unit detects whether the accessory device supports both a first communication method and a second communication method of which communication speed is higher than communication speed of the first communication method. A setting unit sets the second communication method during communication when the detection unit detects that the accessory device supports both the first communication method and the second communication method, and to set the first communication method except communicating.Type: ApplicationFiled: August 18, 2016Publication date: February 23, 2017Inventor: Takayuki Shu
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Patent number: 9554033Abstract: A focus detection apparatus comprises a line sensor including a photoelectric conversion element and an integrating capacitor, a storage unit configured to store information concerning a defective pixel, a first comparison unit configured to compare a signal from the defective pixel with a predetermined threshold, a switching unit configured to switch between a first accumulation mode and a second accumulation mode, and a control unit configured to control the switching unit so as to set the line sensor in the first accumulation mode if the first comparison unit determines that a signal from the defective pixel is not more than the predetermined threshold and set the line sensor in the second accumulation mode if the first comparison unit determines that a signal from the defective pixel is larger than the threshold.Type: GrantFiled: March 16, 2015Date of Patent: January 24, 2017Assignee: Canon Kabushiki KaishaInventors: Takayuki Shu, Takashi Ichimiya
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Patent number: 9456125Abstract: A focus detection apparatus comprises: a sensor unit, having a plurality of photoelectric conversion elements for receiving light that passed through an imaging optical system and accumulating charge, configured to generate an image signal to be used for correlation calculation for focus detection based on the accumulated charge; a control unit configured to control the photoelectric conversion elements to stop charge accumulation in a case where a first signal that represents contrast of the image signal reaches a predetermined voltage level; and a voltage level setting unit. The voltage level setting unit sets a larger voltage level in a first case, in which luminance change in a direction of the correlation calculation in the plurality of the photoelectric conversion elements is gentler than a second case, than in the second case.Type: GrantFiled: March 26, 2015Date of Patent: September 27, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Tomokuni Hirosawa, Takayuki Shu
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Patent number: 9407810Abstract: A focus detection apparatus comprises a sensor unit including a first sensor and a second sensor and configured to output a signal for focus detection, each of the first sensor and the second sensor being configured to receive light that has passed through an imaging optical system and accumulate electric charges, a first signal generation unit configured to generate a first signal based on a contrast of a signal corresponding to the electric charges accumulated in the first sensor, a second signal generation unit configured to generate a second signal based on a contrast of a signal corresponding to the electric charges accumulated in the second sensor; and a control unit configured to control an accumulation time of the electric charges in the first sensor and the second sensor.Type: GrantFiled: January 24, 2014Date of Patent: August 2, 2016Assignee: Canon Kabushiki KaishaInventor: Takayuki Shu
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Patent number: 9167151Abstract: A focus detection apparatus comprises: a sensor unit provided with a plurality of sensor pairs, including a first and second sensor pairs, each of which receives a light beam from an object, accumulates charge, and outputs a pair of image signals for focus detection; a control unit configured to detect a level of a predetermined signal based on the accumulated charge in each sensor pair, and controls charge accumulation time in accordance with the level of the predetermined signal; and a setting unit configured to set a priority of each sensor pair in accordance with the object. The priority of the first sensor pair is set higher than that of the second sensor pair, and the control unit detects the level of the predetermined signal of the first sensor pair in prior to that of the second sensor pair.Type: GrantFiled: March 4, 2014Date of Patent: October 20, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Takayuki Shu, Tomokuni Hirosawa
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Publication number: 20150281557Abstract: A focus detection apparatus comprises: a sensor unit, having a plurality of photoelectric conversion elements for receiving light that passed through an imaging optical system and accumulating charge, configured to generate an image signal to be used for correlation calculation for focus detection based on the accumulated charge; a control unit configured to control the photoelectric conversion elements to stop charge accumulation in a case where a first signal that represents contrast of the image signal reaches a predetermined voltage level; and a voltage level setting unit. The voltage level setting unit sets a larger voltage level in a first case, in which luminance change in a direction of the correlation calculation in the plurality of the photoelectric conversion elements is gentler than a second case, than in the second case.Type: ApplicationFiled: March 26, 2015Publication date: October 1, 2015Inventors: Tomokuni Hirosawa, Takayuki Shu
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Publication number: 20150271385Abstract: A focus detection apparatus comprises a line sensor including a photoelectric conversion element and an integrating capacitor, a storage unit configured to store information concerning a defective pixel, a first comparison unit configured to compare a signal from the defective pixel with a predetermined threshold, a switching unit configured to switch between a first accumulation mode and a second accumulation mode, and a control unit configured to control the switching unit so as to set the line sensor in the first accumulation mode if the first comparison unit determines that a signal from the defective pixel is not more than the predetermined threshold and set the line sensor in the second accumulation mode if the first comparison unit determines that a signal from the defective pixel is larger than the threshold.Type: ApplicationFiled: March 16, 2015Publication date: September 24, 2015Inventors: Takayuki Shu, Takashi Ichimiya
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Publication number: 20140253787Abstract: A focus detection apparatus comprises: a sensor unit provided with a plurality of sensor pairs, including a first and second sensor pairs, each of which receives a light beam from an object, accumulates charge, and outputs a pair of image signals for focus detection; a control unit configured to detect a level of a predetermined signal based on the accumulated charge in each sensor pair, and controls charge accumulation time in accordance with the level of the predetermined signal; and a setting unit configured to set a priority of each sensor pair in accordance with the object. The priority of the first sensor pair is set higher than that of the second sensor pair, and the control unit detects the level of the predetermined signal of the first sensor pair in prior to that of the second sensor pair.Type: ApplicationFiled: March 4, 2014Publication date: September 11, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Takayuki Shu, Tomokuni Hirosawa
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Publication number: 20140218596Abstract: A focus detection apparatus comprises a sensor unit including a first sensor and a second sensor and configured to output a signal for focus detection, each of the first sensor and the second sensor being configured to receive light that has passed through an imaging optical system and accumulate electric charges, a first signal generation unit configured to generate a first signal based on a contrast of a signal corresponding to the electric charges accumulated in the first sensor, a second signal generation unit configured to generate a second signal based on a contrast of a signal corresponding to the electric charges accumulated in the second sensor; and a control unit configured to control an accumulation time of the electric charges in the first sensor and the second sensor.Type: ApplicationFiled: January 24, 2014Publication date: August 7, 2014Applicant: CANON KABUSHIKI KAISHAInventor: Takayuki Shu
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Patent number: 8730142Abstract: A gate line drive circuit includes: X level shift circuits configured to convert first address signals into second address signals; and a logic circuit configured to drive a selection gate line of N gate lines of a display unit based on the second address signals by supplying a first driving voltage to the selection gate line and by supplying a second driving voltage to non-selection gate lines of the N gate lines other than the selection gate line. X is an integer of 1 or more. N is equal to 2 raised to a power X. The first address signals includes X voltages each of which is a first voltage or a second voltage. The second address signals includes X driving voltages each of which is the first driving voltage or the second driving voltage.Type: GrantFiled: July 30, 2009Date of Patent: May 20, 2014Assignee: Renesas Electronics CorporationInventor: Takayuki Shu
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Patent number: 8442396Abstract: A focus detection apparatus comprising a focus detection sensor formed by arranging a plurality of pairs of line sensors, each pair of line sensors receiving light beams that have passed through different pupil areas of an imaging lens configured to form an object image, a sensitivity setting unit configured to set a sensitivity for each pair of the plurality of pairs of line sensors, a selection unit configured to select line sensors of the pair of line sensors, whose signals are to be used for focus detection calculation, and a calculation unit configured to perform the focus detection calculation using the signals of the line sensors selected by the selection unit.Type: GrantFiled: January 6, 2011Date of Patent: May 14, 2013Assignee: Canon Kabushiki KaishaInventor: Takayuki Shu
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Patent number: 7999780Abstract: An amplifier circuit includes an operational amplifier having first and second input nodes and one output node which is connected to a data line for which a pixel is provided; a feedback circuit having first and second elements which are connected to one of the first and second input nodes at their one ends; and a first switch section. The first switch section switches an operation mode between a first drive mode in which the other end of the first element is connected to the output node and a second drive mode in which the other end of the second element is connected to the output node.Type: GrantFiled: April 4, 2007Date of Patent: August 16, 2011Assignee: Renesas Electronics CorporationInventors: Yoshiharu Hashimoto, Takayuki Shu, Masayuki Kumeta
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Publication number: 20110176793Abstract: A focus detection apparatus comprising a focus detection sensor formed by arranging a plurality of pairs of line sensors, each pair of line sensors receiving light beams that have passed through different pupil areas of an imaging lens configured to form an object image, a sensitivity setting unit configured to set a sensitivity for each pair of the plurality of pairs of line sensors, a selection unit configured to select line sensors of the pair of line sensors, whose signals are to be used for focus detection calculation, and a calculation unit configured to perform the focus detection calculation using the signals of the line sensors selected by the selection unit.Type: ApplicationFiled: January 6, 2011Publication date: July 21, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Takayuki Shu
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Patent number: 7808493Abstract: A data line driving circuit includes a first buffer circuit configured to drive a data line, and a second buffer circuit configured to drive a data line. N first data lines (n is a natural number larger than 1), and m second data lines (m is a natural number larger than 1) are alternately arranged in units of data lines as a group. The data line driving circuit further includes a first switch circuit configured to select one of the n first data lines in a first ON period and to connect the selected first data line with the first buffer circuit, and a second switch circuit configured to select one of the m second data lines adjacent to the selected first data line in a second ON period and to connect the selected second data line with the second buffer circuit.Type: GrantFiled: May 18, 2007Date of Patent: October 5, 2010Assignee: NEC Electronics CorporationInventors: Yoshiharu Hashimoto, Takayuki Shu
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Publication number: 20100033417Abstract: A gate line drive circuit includes: X level shift circuits configured to convert first address signals into second address signals; and a logic circuit configured to drive a selection gate line of N gate lines of a display unit based on the second address signals by supplying a first driving voltage to the selection gate line and by supplying a second driving voltage to non-selection gate lines of the N gate lines other than the selection gate line. X is an integer of 1 or more. N is equal to 2 raised to a power X. The first address signals includes X voltages each of which is a first voltage or a second voltage. The second address signals includes X driving voltages each of which is the first driving voltage or the second driving voltage.Type: ApplicationFiled: July 30, 2009Publication date: February 11, 2010Applicant: NEC Electronics CorporationInventor: Takayuki Shu
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Publication number: 20090009510Abstract: A data line driving circuit in a display device has an output terminal and a precharge circuit. The output terminal is connected to a pixel of a display panel through a data line. A gray-scale voltage corresponding to a display data is applied to the data line through the output terminal. The precharge circuit precharges the output terminal to a precharge voltage before the gray-scale voltage is applied to the data line. The precharge voltage depends on the gray-scale voltage.Type: ApplicationFiled: June 24, 2008Publication date: January 8, 2009Applicant: NEC Electronics CorporationInventors: Takayuki Shu, Yoshiharu Hashimoto
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Publication number: 20070273633Abstract: A driving circuit for a display apparatus includes a common line driver that supplies at least two different common voltages to a common line included in the display apparatus, a plurality of data line drivers that supply a data voltage to each of a plurality of data lines included in the display apparatus, and a switch section that has a larger operating voltage range than that of the data line drivers and temporarily short-circuits the common line and the data line.Type: ApplicationFiled: May 8, 2007Publication date: November 29, 2007Applicant: NEC ELECTRONICS CORPORATIONInventors: Yoshiharu Hashimoto, Takayuki Shu, Masayuki Kumeta