Patents by Inventor Masae Kawabata

Masae Kawabata 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).

  • Patent number: 9389474
    Abstract: A liquid crystal panel (10) includes a plurality of pixels arranged in a matrix pattern having rows and columns. A plurality of Cs bus lines (43c) as storage capacitor lines are routed in the row direction of the liquid crystal panel (10). A plurality of branch lines (310) are routed in the column direction across a pixel region (10a). The branch lines (310) are connected to the Cs bus lines (43c) so that control signals are sent to storage capacitors from the branch lines (310) through the Cs bus lines (43c).
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: July 12, 2016
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masae Kawabata, Fumikazu Shimoshikiryoh, Yuki Yamashita, Akihiro Shohraku
  • Patent number: 9318041
    Abstract: A liquid crystal display device includes a liquid crystal panel having a plurality of pixels grouped into four types of type 1, type 2, type 3, and type 4; a panel driver circuit connected to the liquid crystal panel to drive the liquid crystal panel; and a display control circuit connected to the panel driver circuit, wherein said display control circuit divides each refresh cycle of the image signal into consecutive first to fourth terms and causes the panel driver circuit to drive the liquid crystal panel to perform a halftone display by changing pixel luminance during each refresh cycle composed of the first to fourth terms, and wherein said display control circuit provides timing signals and gradation data to the panel driver circuit so that, for a given halftone to be displayed in a refresh cycle, pixels belonging to respective types in the liquid crystal panel are driven such that the halftone is generated as averaged over the first to fourth terms.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: April 19, 2016
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masae Kawabata, Fumikazu Shimoshikiryoh, Kentaroh Irie
  • Patent number: 9236004
    Abstract: In a liquid crystal display device adopting a time-division scheme to improve viewing angle characteristics, the occurrence of horizontal lines on a screen is suppressed. When first output gray scales are obtained for one-line data, the sum total of differences between “source voltages for a horizontal scanning period immediately before a horizontal scanning period during which a processing target line is placed in a selected state” and “source voltages determined based on the first output gray scales obtained by a gray scale value obtaining unit” for all source bus lines is determined (step S110). Then, based on the amount of CS ripple corresponding to the sum total determined at step S110, correction addition/subtraction values are obtained from a polarity-by-polarity background look-up table, for the respective picture elements included in the processing target line (step S120).
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: January 12, 2016
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hiroaki Nakasu, Kentaroh Irie, Masae Kawabata
  • Patent number: 9218791
    Abstract: The present invention provides a liquid crystal display device that appropriately compensates for a feed-through voltage.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: December 22, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kentaroh Irie, Masae Kawabata, Fumikazu Shimoshikiryoh
  • Patent number: 9214122
    Abstract: A liquid crystal display device which carries out a single tone display with a change in pixel luminance during a single cycle composed of first to mth frame periods (m is an integer of 4 or more), includes: pixels of a first type in which when a halftone is displayed, supply of two or more kinds of data voltage during at least either the first to nth frame periods (n is an integer of 2 or more to m or less) or the (n+1)th to mth frame periods causes liquid crystal layers to produce rise responses during the first to nth frame periods and produce decay responses during the (n+1)th to mth frame periods; and pixels of a second type in which when a halftone is displayed, supply of two or more kinds of data voltage during at least either the first to nth frame periods or the (n+1)th to mth frame periods causes liquid crystal layers to produce decay responses during the first to nth frame periods and produce rise responses during the (n+1)th to mth frame periods.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: December 15, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masae Kawabata, Fumikazu Shimoshikiryoh, Kentaroh Irie
  • Patent number: 9093018
    Abstract: The present invention has as an object to reduce display unevenness that occurs under the influence of a coupling between a first pixel in which a green component is displayed and a data signal line by which second pixel is driven. The present invention includes a correction process section (21) for obtaining pixel data on a second pixel in which a blue component or a red component is displayed, the second pixel being driven by a data signal line adjacent to a first pixel in which a green component is displayed, and for, if the pixel data on the second pixel represents a tone value falling within a range of 0 to a predetermined first value, correcting the tone value to be the first value.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: July 28, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Toshikazu Tsuchiya, Masae Kawabata, Fumikazu Shimoshikiryoh
  • Publication number: 20150170613
    Abstract: The present invention provides a liquid crystal display device that appropriately compensates for a feed-through voltage.
    Type: Application
    Filed: February 23, 2015
    Publication date: June 18, 2015
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kentaroh IRIE, Masae KAWABATA, Fumikazu SHIMOSHIKIRYOH
  • Publication number: 20150145972
    Abstract: Provided is a liquid crystal display device with which it is possible to suppress degradation of image quality during video display or three-dimensional display without causing gradational luminance irregularities. Writing of an image to be displayed is sequentially performed from one side of a panel to the other side thereof during each frame period, and writing of a black image is sequentially performed from the one side of the panel to the other side thereof during the vertical blanking period in each frame period. A plurality of LEDs composing a backlight are divided into a plurality of segments so that a group of LEDs arrayed in a line in the direction in which scanning signal lines extend belong to the same segment. A segment lighting control circuit in a backlight control circuit controls emission intensities of the LEDs segment by segment so that the intensity of light irradiating the panel increases gradually from the one side of the panel to the other side thereof.
    Type: Application
    Filed: May 29, 2013
    Publication date: May 28, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Kentaroh Irie, Masae Kawabata, Shinji Matsumoto
  • Publication number: 20150130694
    Abstract: A liquid crystal display device includes a liquid crystal panel having a plurality of pixels grouped into four types of type 1, type 2, type 3, and type 4; a panel driver circuit connected to the liquid crystal panel to drive the liquid crystal panel; and a display control circuit connected to the panel driver circuit, wherein said display control circuit divides each refresh cycle of the image signal into consecutive first to fourth terms and causes the panel driver circuit to drive the liquid crystal panel to perform a halftone display by changing pixel luminance during each refresh cycle composed of the first to fourth terms, and wherein said display control circuit provides timing signals and gradation data to the panel driver circuit so that, for a given halftone to be displayed in a refresh cycle, pixels belonging to respective types in the liquid crystal panel are driven such that the halftone is generated as averaged over the first to fourth terms.
    Type: Application
    Filed: January 23, 2015
    Publication date: May 14, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Masae KAWABATA, Fumikazu SHIMOSHIKIRYOH, Kentaroh IRIE
  • Publication number: 20150130854
    Abstract: An objective of the present invention is to implement a liquid crystal display device which is capable of a three dimensional display, with which it is possible to alleviate image quality degradation caused by crosstalk when a difference in gradation between a left eye image and a right eye image is large. Provided is a liquid-crystal display device that is capable of a three dimensional display, in which a panel drive control circuit alternately performs writing of a right-eye image and writing of a left-eye image for each frame period in order from one end to another end of a liquid crystal panel, and performs writing of either a near-black image or a black image in order from the one end to the other end of the liquid crystal panel in a vertical blanking period during each of the frame periods.
    Type: Application
    Filed: May 29, 2013
    Publication date: May 14, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Shinji Matsumoto, Masae Kawabata, Kentaroh Irie
  • Patent number: 8994760
    Abstract: The present invention provides a liquid crystal display device that appropriately compensates for a feed-through voltage.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: March 31, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kentaroh Irie, Masae Kawabata, Fumikazu Shimoshikiryoh
  • Patent number: 8982287
    Abstract: Provided is a data processing apparatus including a correction circuit. In at least one embodiment, the data correction circuit acquires pixel data of a first pixel for display of a first color component and pixel data of a second pixel for display of a second color component, the second pixel being driven by a scanning signal line which drives the first pixel and being driven by a data signal line which is adjacent to the first pixel, and corrects the pixel data of the second pixel in accordance with a relationship between a value of the pixel data of the first pixel and a value of the pixel data of the second pixel. Thus, it is possible to cause a liquid crystal driving panel to perform uniform display without causing display unevenness even in a case where a halftone of a specific color component is uniformly displayed.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: March 17, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshikazu Tsuchiya, Masae Kawabata, Fumikazu Shimoshikiryoh
  • Patent number: 8976096
    Abstract: Provided is a liquid crystal display device which displays each halftone by changing the luminance of pixels during a cycle (F1-F8) composed of a first term (F1-F2), a second term (F3-F4), a third term (F5-F6), and a fourth term (F7-F8).
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: March 10, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masae Kawabata, Fumikazu Shimoshikiryoh, Kentaroh Irie
  • Publication number: 20140368762
    Abstract: A liquid crystal panel (10) includes a plurality of pixels arranged in a matrix pattern having rows and columns. A plurality of Cs bus lines (43c) as storage capacitor lines are routed in the row direction of the liquid crystal panel (10). A plurality of branch lines (310) are routed in the column direction across a pixel region (10a). The branch lines (310) are connected to the Cs bus lines (43c) so that control signals are sent to storage capacitors from the branch lines (310) through the Cs bus lines (43c).
    Type: Application
    Filed: September 3, 2014
    Publication date: December 18, 2014
    Inventors: Masae KAWABATA, Fumikazu SHIMOSHIKIRYOH, Yuki YAMASHITA, Akihiro SHOHRAKU
  • Patent number: 8878760
    Abstract: At least one embodiment of a liquid crystal display device including: scanning signal lines provided in a display area; and a dummy scanning signal line provided in a non-display area, the scanning signal lines being divided into groups each of which includes a plurality of scanning signal lines, the groups being sequentially selected, signal electric potentials of an identical polarity being sequentially supplied to a data signal line while scanning signal lines belonging to a selected group are sequentially scanned horizontally, the polarity of the signal electric potentials being inverted when the selected group is changed from a preceding group to a succeeding group which is selected immediately after the preceding group, a dummy scanning period being inserted between a horizontal scanning period corresponding to last horizontal scanning in the preceding group and a horizontal scanning period corresponding to first horizontal scanning in the succeeding group, and the dummy scanning signal line being subje
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: November 4, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masae Kawabata, Fumikazu Shimoshikiryoh, Toshikazu Tsuchiya
  • Patent number: 8854562
    Abstract: A liquid crystal panel (10) includes a plurality of pixels arranged in a matrix pattern having rows and columns. A plurality of Cs bus lines (43c) as storage capacitor lines are routed in the row direction of the liquid crystal panel (10). A plurality of branch lines (310) are routed in the column direction across a pixel region (10a). The branch lines (310) are connected to the Cs bus lines (43c) so that control signals are sent to storage capacitors from the branch lines (310) through the Cs bus lines (43c).
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: October 7, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masae Kawabata, Fumikazu Shimoshikiryoh, Yuki Yamashita, Akihiro Shohraku
  • Patent number: 8830255
    Abstract: The present invention provides a display device which is arranged so that when an image is scrolled, a noise pattern does not easily overlap the image. The display device includes a display region that includes a region in which an arrangement pattern (U1) including X i-th pixels arranged next to one another in the row direction for each data color, the arrangement pattern being repeated in the row direction, the X being represented by X=A/2+A·Q, where Q is an integer of 0 or greater, and is defined for each row.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: September 9, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kentaroh Irie, Masae Kawabata, Fumikazu Shimoshikiryoh
  • Patent number: 8743047
    Abstract: At least one embodiment of a liquid crystal display device including: pixels each of which includes a plurality of sub-pixels; and scanning signal lines provided in a display area, the scanning signal lines being divided into groups each of which includes a plurality of scanning signal lines, the groups being sequentially selected, the polarity POL of signal electric potentials being inverted when the selected group is changed from a preceding group to a succeeding group which is selected immediately after the preceding group, a plurality of (for example, two) dummy scanning periods being inserted between a horizontal scanning period corresponding to last horizontal scanning (scanning of G23) in the preceding group and a horizontal scanning period corresponding to first horizontal scanning (scanning of G2) in the succeeding group, and a scanning signal line (for example, G2) which belongs to a group selected after the preceding group being subjected to dummy scanning during each dummy scanning period so as to
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: June 3, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masae Kawabata, Fumikazu Shimoshikiryoh
  • Patent number: 8736544
    Abstract: At least one embodiment of a liquid crystal display device including a display unit having scan signal lines divided into a plurality of groups which are successively selected. While the scan signal lines belonging to the selected group are successively scanned horizontally, signal potentials of the same polarity are successively supplied to a data signal line. The polarity of the signal potential is reversed between a preceding group and a subsequent group which are selected continuously. A plurality of dummy scan periods are inserted between the horizontal scan period corresponding to the last horizontal scan in the preceding group and the horizontal scan period corresponding to the first horizontal scan in the subsequent group.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: May 27, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Fumikazu Shimoshikiryoh, Masae Kawabata
  • Publication number: 20140139562
    Abstract: In a liquid crystal display device adopting a time-division scheme to improve viewing angle characteristics, the occurrence of horizontal lines on a screen is suppressed. When first output gray scales are obtained for one-line data, the sum total of differences between “source voltages for a horizontal scanning period immediately before a horizontal scanning period during which a processing target line is placed in a selected state” and “source voltages determined based on the first output gray scales obtained by a gray scale value obtaining unit” for all source bus lines is determined (step S110). Then, based on the amount of CS ripple corresponding to the sum total determined at step S110, correction addition/subtraction values are obtained from a polarity-by-polarity background look-up table, for the respective picture elements included in the processing target line (step S120).
    Type: Application
    Filed: July 20, 2012
    Publication date: May 22, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroaki Nakasu, Kentaroh Irie, Masae Kawabata