Patents by Inventor Kohji Fujiwara
Kohji Fujiwara 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: 10817073Abstract: An electronic device capable of detecting a rotation amount of a dial without depending on a mechanism is achieved. A ring-like shape dial surrounds a peripheral edge of an electrostatic type touch panel, the dial includes a conductive pattern, which is formed of a conductive material, on an inner surface facing the touch panel.Type: GrantFiled: March 16, 2018Date of Patent: October 27, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Tomohiro Kimura, Kohji Fujiwara, Hiroshi Fukushima
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Publication number: 20200089327Abstract: An electronic device capable of detecting a rotation amount of a dial without depending on a mechanism is achieved. A ring-like shape dial surrounds a peripheral edge of an electrostatic type touch panel, the dial includes a conductive pattern, which is formed of a conductive material, on an inner surface facing the touch panel.Type: ApplicationFiled: March 16, 2018Publication date: March 19, 2020Inventors: TOMOHIRO KIMURA, KOHJI FUJIWARA, HIROSHI FUKUSHIMA
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Patent number: 10428757Abstract: A fuel injection control device for an internal combustion engine includes an electronic control unit configured to execute division processing for learning for dividing a requested injection amount into an injection amount of partial lift injection of an in-cylinder injection valve and a port injection amount of injection of a port injection valve, detect, on the basis of at least one of a terminal electric potential of a coil and a current flowing through the coil, an inflection point of a change in induced electromotive force of the coil in time attributable to a decline in a relative speed of a mover with respect to the coil, and correct the energization processing at a time when the partial lift injection is executed based on a timing of the detection of the inflection point.Type: GrantFiled: January 10, 2018Date of Patent: October 1, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yohei Moriyama, Shinji Satoh, Daisuke Kobayashi, Kohji Fujiwara
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Publication number: 20180209370Abstract: A fuel injection control device for an internal combustion engine includes an electronic control unit configured to execute division processing for learning for dividing a requested injection amount into an injection amount of partial lift injection of an in-cylinder injection valve and a port injection amount of injection of a port injection valve, detect, on the basis of at least one of a terminal electric potential of a coil and a current flowing through the coil, an inflection point of a change in induced electromotive force of the coil in time attributable to a decline in a relative speed of a mover with respect to the coil, and correct the energization processing at a time when the partial lift injection is executed based on a timing of the detection of the inflection point.Type: ApplicationFiled: January 10, 2018Publication date: July 26, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yohei MORIYAMA, Shinji SATOH, Daisuke KOBAYASHI, Kohji FUJIWARA
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Patent number: 9811216Abstract: A display device (1) includes a display panel (12), a touch panel (14) for detecting contact of a target object with a display region (P) of the display panel (12) or approach thereof to the display region (P), and a casing (17) containing the display panel (12) and the touch panel (14), a minimum distance (d) between the touch panel (14) and an outside surface (A) being not larger than a detectable distance, within which the touch panel (14) is capable of detecting the contact of the target object with the outside surface (A) or the approach thereof to the outside surface (A).Type: GrantFiled: September 13, 2013Date of Patent: November 7, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Yasuhiro Sugita, Tomohiro Kimura, Shinji Yamagishi, Hiroyuki Ogawa, Kohji Fujiwara
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Patent number: 9711093Abstract: The light emitting device is divided into a plurality of areas, and has, as main configuration elements, an area drive circuit (2), which generates LED data and LCD data, an LED controller (4), and a backlight unit (5), which is provided with a plurality of LEDs (52) corresponding to each of the areas. The power calculating unit of the LED controller (4) is mainly configured of a power calculating circuit (42), a power limiter circuit (43), and a limit value updating circuit (45), and the emission power to be supplied to each of the LEDs (52) is calculated for each are on the basis of image data. The power calculating unit performs the calculation such that the sum (Psum) of the emission power does not exceed a power limit value (Plimit) currently set, and updates the power limit value (Plimit) by following a previously set pattern.Type: GrantFiled: November 10, 2010Date of Patent: July 18, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Kohji Fujiwara, Takayuki Murai
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Patent number: 9632322Abstract: A display device is provided with: a display module that is provided with a first display region and a second display region; an optical member that faces the second display region, and that has a transmissive mirror portion; and a positioning member. The display module and the optical member respectively have end faces in contact with the positioning member, and end faces as free ends.Type: GrantFiled: July 22, 2014Date of Patent: April 25, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Tomohiro Kimura, Kohji Fujiwara
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Patent number: 9557600Abstract: A backlight unit includes excellent heat radiation characteristics. The backlight unit of an embodiment of the present invention includes a chassis and a light source attached to the chassis. As the light source, an LED is preferably used. The chassis includes an aluminum base or aluminum layer, and a porous alumina layer or pore-sealed porous alumina layer provided on the surface of the aluminum base or aluminum layer.Type: GrantFiled: March 31, 2011Date of Patent: January 31, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Takao Imaoku, Takatomo Yoshioka, Kohji Fujiwara
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Publication number: 20160238853Abstract: A display device is provided with: a display module that is provided with a first display region and a second display region; an optical member that faces the second display region, and that has a transmissive mirror portion; and a positioning member. The display module and the optical member respectively have end faces in contact with the positioning member, and end faces as free ends.Type: ApplicationFiled: July 22, 2014Publication date: August 18, 2016Applicant: Sharp Kabushiki KaishaInventors: Tomohiro KIMURA, Kohji FUJIWARA
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Patent number: 9361835Abstract: In the present liquid crystal display device, an LED output value correction section (513) included in an area-active drive processing section (5) corrects LED data Dbl obtained by an LED output value calculation section (512) with reference to a luminance correction LUT (13), such that the luminance in the area from an intermediate value to near a maximum value shifts to a higher degree. Thus, even if the backlight luminance is low (typically, the mean luminance of an input image is low), contrast ratio is enhanced, thereby preventing a tone jump (insufficient luminance) at high tone levels due to an insufficient backlight luminance.Type: GrantFiled: November 17, 2010Date of Patent: June 7, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Tetsuya Ueno, Kohji Fujiwara
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Patent number: 9324279Abstract: A micon unit (11) performs, along at least one direction within the plane of planar light, brightness correction processing for adjusting brightness distribution of the planar light on light source color video signals (RSd, Gsd and BSd) so as to change them into light source color video signals (RSd?, GSd? and BSd?), and the micon unit (11) further calculates the total light emission power of all LEDs (52) based on the light source color video signals (RSd?, GSd? and BSd?), and performs, when the total light emission power exceeds an allowable light emission power, light emission power correction processing on the light source color video signals (RSd?, GSd? and BSd?).Type: GrantFiled: November 11, 2010Date of Patent: April 26, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Kohji Fujiwara, Takayuki Murai
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Patent number: 9159272Abstract: Specifically provided is a light emitting device for image display, wherein each of light emitting elements, a PWM control unit which PWM-controls a current to be supplied to the light emitting element, a control condition setting unit which, according to the APL of image data, determines and updatably sets the PWM limiting condition for limiting the PWM value that is the duty ratio of the PWM control, and the reference current value that is the value of the current flowing to the light emitting element in response to turn-on of the PWM control, and a PWM value calculation unit which on the basis of the image data, the PWM limit condition, and the reference current value, calculates the PWM value of each area, and the PWM control unit performs the PWM control on the basis of the reference current value and the calculated PWM value.Type: GrantFiled: November 16, 2010Date of Patent: October 13, 2015Assignee: Sharp Kabushiki KaishaInventors: Takayuki Murai, Kohji Fujiwara, Tomohiko Yamamoto
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Publication number: 20150261347Abstract: A display device (1) includes a display panel (12), a touch panel (14) for detecting contact of a target object with a display region (P) of the display panel (12) or approach thereof to the display region (P), and a casing (17) containing the display panel (12) and the touch panel (14), a minimum distance (d) between the touch panel (14) and an outside surface (A) being not larger than a detectable distance, within which the touch panel (14) is capable of detecting the contact of the target object with the outside surface (A) or the approach thereof to the outside surface (A).Type: ApplicationFiled: September 13, 2013Publication date: September 17, 2015Inventors: Yasuhiro Sugita, Tomohiro Kimura, Shinji Yamagishi, Hiroyuki Ogawa, Kohji Fujiwara
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Patent number: 9122094Abstract: Provided is a backlight unit (49) which includes a plurality of LEDs (11). The LEDs (11) are two-dimensionally disposed, thereby having the collection of light emitted from the LEDs (11) in a state of planar light. Furthermore, the backlight unit (49) has the planar light divided into a plurality of sections, and includes a luminance variable system (for instance, a system having disposition which a difference in the density of LEDs (11)), which can change luminance, corresponding to each section.Type: GrantFiled: March 15, 2010Date of Patent: September 1, 2015Assignee: Sharp Kabushiki KaishaInventors: Kohji Fujiwara, Takayuki Murai, Kingfoong Lew
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Patent number: 8988338Abstract: In an image display device which performs area-active drive, backlight sources are emitted with appropriate luminances while inhibiting increase in power consumption and inhibiting reduction of image quality. An emission luminance calculation section divides an input image into a plurality of areas, and obtains luminances upon emission (first emission luminances) of LEDs in the areas. A plurality of correction modes are prepared as methods for correcting the first emission luminances, and a correction mode that is applied to an emission luminance correction process (selected correction mode) is stored to a correction mode storage section. For any LED units whose flag data stored in a correction-enabled map has the value of 1, an emission luminance correction section corrects their first emission luminances to obtain second emission luminances in accordance with the selected correction mode, with reference to correction value data stored in correction value tables.Type: GrantFiled: May 18, 2010Date of Patent: March 24, 2015Assignee: Sharp Kabushiki KaishaInventors: Katsuya Otoi, Kohji Fujiwara, Katsuteru Hashimoto
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Patent number: 8976204Abstract: Disclosed is a liquid crystal display device (1) provided with a backlight part (3) that has a light-emitting diode (light source), and a liquid crystal panel (display part) (2) that includes a plurality of pixels (P) and displays information using illumination light from the backlight part (3). A video generating device (control part) (9) decides, in a frame in which a gray-scale transition occurs, at least a length of either an OFF period of the light-emitting diode in a first half of the frame or an ON period of the light-emitting diode in a latter half of the frame, based on the time information from the time information generating part (26), and outputs an instruction signal to a light source driving part (14) in accordance with the decided OFF or ON period for driving the light-emitting diode.Type: GrantFiled: January 7, 2011Date of Patent: March 10, 2015Assignee: Sharp Kabushiki KaishaInventors: Hirofumi Murakami, Kohji Fujiwara
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Patent number: 8963800Abstract: In order to display an image with a high contrast ratio while suppressing power consumed by a multi-display device and to adjust brightness of images displayed on image display devices, the multi-display device includes light emission APL value adjusting means 102. The light emission APL value adjusting means 102 sends, to light emission control means, a light emission APL value that has been adjusted, on the basis of light emission APL values calculated by light emission APL value calculating means of image display devices 11 to 19, so that total light emission power value of image-display light-emitting means 6 does not exceed an allowable power value and images are displayed at predetermined brightness.Type: GrantFiled: February 3, 2012Date of Patent: February 24, 2015Assignee: Sharp Kabushiki KaishaInventors: Takayuki Murai, Hideki Ichioka, Kohji Fujiwara, Naoko Kondoh
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Publication number: 20140373082Abstract: A display system (100) includes a television receiver (110a) and a smartphone (110b). The television receiver (110a) is provided with a display unit (51a) for outputting content and a keyword detector (15) for extracting keywords (1) from the content. The smartphone (110b) is provided with a keyword selector (16) and a keyword-related information acquisition unit (17) that extract the related information (2) acquired from the outside that is related to the keywords (1) selected by the user from among the keywords (1) extracted by a keyword detector (15), and a display unit (51b) for outputting the keywords (1) and the related information (2).Type: ApplicationFiled: January 30, 2013Publication date: December 18, 2014Applicant: Sharp Kabushiki KaishaInventors: Akiko Miyazaki, Kohji Fujiwara, Tomohiro Kimura, Toshiharu Kusumoto
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Patent number: 8885103Abstract: The present display device is a display device in which a display unit is provided with a first area (MAR) that displays a first picture and a second area (SAR) that displays a second picture, and is equipped with a first illumination unit that illuminates the first area with light and a second illumination unit that illuminates the second area with light, wherein power supply to the first illumination unit and power supply to the second illumination unit are controlled separately. Thus, it is possible to reduce power consumption.Type: GrantFiled: December 26, 2011Date of Patent: November 11, 2014Assignee: Sharp Kabushiki KaishaInventors: Kohji Fujiwara, Tomohiro Kimura, Akiko Miyazaki, Toshiharu Kusumoto
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Patent number: 8872756Abstract: A backlight unit according to the present invention includes a plurality of LED drivers (5a) to (5i), an LED controller (61) that generates a control information group in which lighting control information for selected LED drivers is arranged and a cascade line that connects the LED drivers in cascade. The LED controller (61) enables the selected LED drivers (5), and feeds the control information group to the cascade line, and the enabled LED drivers (5) perform an operation (acquisition operation) of acquiring the lighting control information on itself among the control information group whereas the LED drivers (5) that are not enabled do not perform the acquisition operation. According to the present invention, it is possible to reduce the performance of unnecessary operations of the backlight unit. The present invention can be utilized in a liquid crystal display device that uses LEDs as a light source of backlight.Type: GrantFiled: March 10, 2010Date of Patent: October 28, 2014Assignee: Sharp Kabushiki KaishaInventors: Kohji Fujiwara, Takayuki Murai