Patents by Inventor Toshihiro Yanagi

Toshihiro Yanagi 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).

  • Publication number: 20140225881
    Abstract: A display device (1) includes (i) refresh rate changing means (15) for changing a refresh rate of a display panel (2) and (ii) a polarity reversal controlling section (20) for changing, in accordance with a change in the refresh rate, at least one of a temporal cycle and a spatial cycle of a polarity reversal of a source signal.
    Type: Application
    Filed: August 7, 2012
    Publication date: August 14, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kohzoh Takahashi, Kohji Saitoh, Akizumi Fujioka, Jun Nakata, Toshihiro Yanagi
  • Publication number: 20140191989
    Abstract: Electronic apparatus (100) includes a display device (1), a detecting device (20) which detects an input, a state change detecting section (31), and a control section. The control section controls the detecting device (20) so that the detecting device (20) carries out the detection more times during a non-scanning period in a case where a state change causing an improvement in detection accuracy is detected and so that the detecting device (20) carries out the detection fewer times during the non-scanning period in a case where the state change causing a deterioration in detection accuracy is detected. With the configuration, it is possible to improve detection accuracy of the detecting device while reducing electric power consumption.
    Type: Application
    Filed: April 3, 2012
    Publication date: July 10, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kohji Saitoh, Akizumi Fujioka, Masami Ozaki, Toshihiro Yanagi
  • Publication number: 20140168197
    Abstract: Provided is a display system (1) capable of further reducing electric power consumption. The display system (1) includes: a host device (2) including transceivers (Tx1, Tx2); a display device (3) including receivers (Rx1, Rx2); a plurality of interfaces (IF1, IF2) for transmitting image data from the transceivers (Tx1, Tx2) to the receivers (Rx1, Rx2); changing means for changing the number of transmission lanes to be used by each of the plurality of interfaces (IF1, IF2); and a display panel (5) provided in the display device (3). Each of the interfaces (IF1, IF2) transmits the image data at an identical transmission rate irrespective of the number of the transmission lanes to be used. The display panel (5) displays an image indicated by the image data, at a frame rate corresponding to the total number of the transmission lanes to be used by the each of the interfaces (IF1, IF2).
    Type: Application
    Filed: August 7, 2012
    Publication date: June 19, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Fumiyuki Kobayashi, Kohji Saitoh, Masami Ozaki, Taketoshi Nakano, Toshihiro Yanagi
  • Publication number: 20140168199
    Abstract: In one embodiment of the present application, a display controller is capable of changing a refresh rate, indicative of how often a screen displayed on a display device having a plurality of pixels is switched, between a low refresh rate of 40 Hz and a normal refresh rate of 60 Hz and generates (i) a dot clock (reference clock) serving as a timing signal indicative of a timing of operation in the display device, (ii) video data indicative of an image to be displayed on the screen, (iii) Hsync for defining a horizontal period of a display on the screen, and (vi) Vsync for defining a vertical period of the display on the screen, so as to supply the dot clock, the video data, Hsync, and Vsync to the display device, wherein the display controller includes a dot clock generation circuit for generating the reference clock whose frequency is constant without depending on a change of the refresh rate.
    Type: Application
    Filed: February 19, 2014
    Publication date: June 19, 2014
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Toshihiro Yanagi, Takuji Miyamoto, Atsuhito Murai
  • Publication number: 20140160237
    Abstract: A black line inserting section (3) inserts first grayscale inserts first grayscale lines, each of which has a color of certain grayscale and has a width corresponding to a certain number of pixels, into each of first video images such that a certain distance is secured, between the respective first grayscale lines, in a vertical or horizontal direction of each of the first video images. The black line inserting section (3) also inserts second grayscale lines into each of second video images, which corresponds to a certain number of frames and by which a corresponding one of the first video images is followed, such that the second grayscale lines are not inserted into second parts corresponding to first parts where the respective first grayscale lines are inserted.
    Type: Application
    Filed: July 18, 2012
    Publication date: June 12, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Ryoh Araki, Toshihiro Yanagi, Yoshinobu Hirayama, Kenichiroh Yamaki
  • Publication number: 20140152783
    Abstract: The display device (1) displays, based on at least information indicative of a visual line direction (20) of an observer (2), a three-dimensional video image (18) which (i) varies depending on the visual line direction (20) and (ii) is directing to the observer (2). The observer (2) can view the three-dimensional video image (18) of a three-dimensional object from various angles as if the observer (2) viewed the actual three-dimensional object from various angles.
    Type: Application
    Filed: August 29, 2012
    Publication date: June 5, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kei Oyobe, Toshihiro Yanagi, Ryoh Araki, Shigenori Tanaka, Yoshinobu Hirayama, Kryoshi Nakagawa
  • Patent number: 8723775
    Abstract: In one embodiment of the present invention, when a still image is displayed, applied voltages respectively corresponding to a total of n (n being an integer of not less than 4) types of gradation 0 to (n?1) are outputted to pixels. When a moving image is displayed, an applied voltage corresponding to a predetermined gradation m (1?m?(n?2)) is applied to the pixels instead of applied voltages respectively corresponding to gradations of less than the predetermined gradation m. Overdrive driving is performed with respect to a total of n types of gradation.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: May 13, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Asahi Yamato, Yuki Kawashima, Kiyoshi Nakagawa, Kohzoh Takahashi, Toshihiro Yanagi
  • Publication number: 20140125569
    Abstract: According to a liquid crystal display device (1), a gate driver is controlled to (a) scan all of scan signal lines during at least two driving frames contained in a first driving period and (b) not scan any of the scan signal lines during pausing frames in a pausing period which is (i) secured between the first driving period and a second driving period by which the first driving period is followed and (ii) is longer than each of the first and second driving periods.
    Type: Application
    Filed: July 2, 2012
    Publication date: May 8, 2014
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Jun Nakata, Akizumi Fujioka, Kohzoh Takahashi, Toshihiro Yanagi, Masami Ozaki
  • Publication number: 20140104301
    Abstract: There is provided an image display device, in which a pixel includes sub-pixels of four or more colors that include a color in addition to the three primary colors, and which can display a high-quality image in which false colors or artifacts are suppressed. The image display device includes a pixel area in which a plurality of pixels P are arranged in a matrix shape, and each of the pixels P includes m (m is an integer which is equal to or greater than 4) sub-pixels SP. When it is assumed that the colors of the m sub-pixels SP included in one pixel are C1, C2, . . . , and Cm, the m sub-pixels SP which are sequentially arrayed from an arbitrary position include all of the colors of C1, C2, . . . , and Cm in both the vertical direction and the horizontal direction in the pixel area.
    Type: Application
    Filed: June 20, 2012
    Publication date: April 17, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shinji Nakagawa, Hidekazu Miyata, Hiroyuki Furukawa, Kazuyoshi Yoshiyama, Yasuhiro Yoshida, Toshihiro Yanagi, Taketoshi Nakano, Asahi Yamato, Ken Inada
  • Patent number: 8692822
    Abstract: A display controller is capable of changing a refresh rate, indicative of how often a screen displayed on a display device having a plurality of pixels is switched, between a low refresh rate of 40 Hz and a normal refresh rate of 60 Hz and generates (i) a dot clock (reference clock) serving as a timing signal indicative of a timing of operation in the display device, (ii) video data indicative of an image to be displayed on the screen, (iii) Hsync for defining a horizontal period of a display on the screen, and (vi) Vsync for defining a vertical period of the display on the screen, so as to supply the dot clock, the video data, Hsync, and Vsync to the display device, wherein the display controller includes a dot clock generation circuit for generating the reference clock whose frequency is constant without depending on a change of the refresh rate.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: April 8, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshihiro Yanagi, Takuji Miyamoto, Atsuhito Murai
  • Publication number: 20140085280
    Abstract: A timing controller (7) controls a display module (2) which carries out a scanning process to display a picture based on a picture signal. The timing controller (7) is configured such that when a display signal reception section (20) no longer receives the picture signal, an operation determination section (21) determines the scanning process should be paused, and a timing generation section (22) instructs drive circuits (4, 5) to pause the scanning process in a display panel (2a).
    Type: Application
    Filed: May 24, 2012
    Publication date: March 27, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kohji Saitoh, Asahi Yamato, Masami Ozaki, Toshihiro Yanagi
  • Publication number: 20140055697
    Abstract: A source AMP output circuit (10) is provided with a switching circuit (17) for carrying out the following operation. That is, in a case where a polarity is reversed, the switching circuit (17) disconnects a data signal line (S(M)) from output terminals of a positive amplifier circuit (15) and a negative polarity amplifier circuit (16) each included in the source AMP output circuit (10), and then connects the data signal line S(M) to a power supply which is in a power supply voltage range (Vdd1 to Vdd3) of the positive polarity amplifier circuit (15) or to a power supply which is in a power supply voltage range (Vdd2 to Vdd4) of the negative polarity amplifier circuit (16).
    Type: Application
    Filed: April 23, 2012
    Publication date: February 27, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kohji Saitoh, Masaki Uehata, Masami Ozaki, Toshihiro Yanagi
  • Publication number: 20140043377
    Abstract: A backlight unit (20) includes: light sources (4A, 4B); light guide members (2A, 2B), the light source (4A) being provided to a side surface of the light guide member (2A), the light source (4B) being provided to a side surface of the light guide member (2B), the light sources (4A, 4B) being provided across the light guide members (2A, 2b) in plane view; and an optical path changing member (1) for changing an optical path of light passing through the optical path changing member, the optical path changing member (1) having a light incidence surface (SUF1) for receiving light emitted directly from the light guide member (2A or 2B), and a light exit surface (SUF2) for emitting, directly to a display panel outside of the backlight unit (20), the light thus received via the light incidence surface (SUF1).
    Type: Application
    Filed: April 16, 2012
    Publication date: February 13, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shigenori Tanaka, Ryoh Araki, Yoshinobu Hirayama, Toshihiro Yanagi
  • Publication number: 20140043357
    Abstract: The display device (100) including a display panel (20) including pixels (21) each of which includes a red (R) sub pixel (22), a green (G) sub pixel (23), a blue (B) sub pixel (24), and white (W)sub pixel (25), the display device (100) includes an RGB data obtaining section (110) for obtaining RGB data; and a first calculating section (1 12a) for setting luminance of a white (W) sub pixel of one pixel (21) of the pixels (21) to be substantially identical with luminance of white sub pixels of some pixels (21) of the pixels (21) in the case where the RGB data obtained by the obtaining section (100) is converted into RGBX data for each pixel.
    Type: Application
    Filed: April 4, 2012
    Publication date: February 13, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Asahi Yamato, Ken Inada, Taketoshi Nakano, Toshihiro Yanagi
  • Publication number: 20140028955
    Abstract: Provided are (i) at least two light sources (4A and 4B), (ii) a light guide plate (2) having a light exit surface (SUF4), and (iii) an optical path changing member (1) which directly receives light emitted from the light exit surface (SUF4) and which has a light exit surface (SUF2) from which the light is directly emitted to a liquid crystal panel (5). The light emitted from the light exit surface (SUF2) has a luminance directivity in which luminance distribution is maximum in at least two directions other than a direction normal to a display screen of the liquid crystal panel (5).
    Type: Application
    Filed: April 16, 2012
    Publication date: January 30, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shigenori Tanaka, Yoshinobu Hirayama, Toshihiro Yanagi
  • Publication number: 20140028658
    Abstract: Provided for each data signal line drive circuit (6a, 6b, 6c) are: a voltage generation circuit (61a, 61b, 61c) that generates a drive voltage in accordance with an external voltage; and a voltage determination circuit (63a, 63b, 63c) which determines whether or not a voltage level of at least either the external voltage or the drive voltage falls within a range of allowable voltages, in a case where the voltage level does not fall within the range of allowable voltages, operation of the voltage generation circuits (61a, 61b, 61c) being stopped.
    Type: Application
    Filed: April 5, 2012
    Publication date: January 30, 2014
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Jun Nakata, Masaki Uehata, Kohji Saitoh, Masami Ozaki, Toshihiro Yanagi
  • Publication number: 20140028655
    Abstract: A display device (10) includes a timing control section (13) and a signal line drive circuit (16), either of which receives a lower power supply voltage level than the other, and a level changing circuit (20) for changing an amplitude level (T) of a reset signal (B). The timing control section (13) and the level changing circuit (20) receive the reset signal (B). The level changing circuit (20) changes the amplitude level (T) of the supplied reset signal (B) and then supply, to the signal line drive circuit (16), a reset signal (Ba) with a converted amplitude level. This makes it possible to achieve an image display with low power consumption and a stable display quality.
    Type: Application
    Filed: April 4, 2012
    Publication date: January 30, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kazuki Takahashi, Masaki Uehata, Kohji Saitoh, Masami Ozaki, Toshihiro Yanagi
  • Publication number: 20140028646
    Abstract: A display device including a display panel and repeating a scanning period during which the display panel is scanned and a pause period during which the display panel is not scanned. A scanning period and a pause period are set successively to a preceding frame out of two consecutive frames. A pause period is set to an entire period of a subsequent frame out of the two consecutive frames.
    Type: Application
    Filed: April 3, 2012
    Publication date: January 30, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kohji Saitoh, Asahi Yamato, Masami Ozaki, Toshihiro Yanagi, Masakazu Wada
  • Publication number: 20140028739
    Abstract: Disclosed is a display device that (i) converts an input image formed of R, G, and B into a converted image formed of R, G, B, and W to display the converted image and that (ii) compresses the luminance of an input image for the subsequent frame on the basis of an adjustment value C which is corrected in correspondence with the number of, among all pixels in a converted image for the current frame, pixels in a state of luminance saturation and that then converts the input image into a converted image, the display device including a luminance oscillation detecting section (10) for detecting, while input images identical to each other are being inputted each as the above input image, whether converted images corresponding to the respective input images have an oscillating luminance, the display device, in the case where the luminance oscillation detecting section (10) has detected that the converted images have an oscillating luminance, stopping correction of the adjustment value C to fix the adjustment value C
    Type: Application
    Filed: April 9, 2012
    Publication date: January 30, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kohzoh Takahashi, Taketoshi Nakano, Asahi Yamato, Ken Inada, Fumiyuki Kobayashi, Toshihiro Yanagi
  • Publication number: 20140028654
    Abstract: In order to provide a display device and a method for driving a display device, each of which is capable of repairing a disconnection in a data signal line and further reduces electric power consumption, a display device (1) includes a repair amplifier control section (14) for causing a repair amplifier circuit (12) to operate at a low-performance level during any period within a period from when scanning of pixels in the display area in the display device (1) is finished to when next scanning is started.
    Type: Application
    Filed: April 4, 2012
    Publication date: January 30, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kohji Saitoh, Masaki Uehata, Masami Ozaki, Toshihiro Yanagi