Patents by Inventor Kota Muto
Kota Muto 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: 8866858Abstract: An electro-optical device includes a control unit that controls a display unit having a plurality of pixels. The control unit performs a differential driving operation of performing an operation of erasing a first image component which is a part of a display image in a first display state and an operation of displaying a second image component which is a part of a display image in a second display state by selectively driving the pixels having different gray scales in the first display state and the second display state when the display unit is changed from the first display state to the second display state. The operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component.Type: GrantFiled: March 31, 2011Date of Patent: October 21, 2014Assignee: Seiko Epson CorporationInventors: Kota Muto, Masato Nishizawa
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Publication number: 20140285479Abstract: In a refresh period, a voltage for alternatingly inverting a memory display element between a first gray level and a second gray level is applied. The number of inversions in the refresh period when the temperature of the memory display element is low is lower than the number of inversions in the refresh period when the temperature of the memory display element is high.Type: ApplicationFiled: February 27, 2014Publication date: September 25, 2014Applicant: SEIKO EPSON CORPORATIONInventors: Toshimichi YAMADA, Kota MUTO, Hiroaki KANAMORI, Atsushi MIYAZAKI
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Publication number: 20140253604Abstract: An adjustment phase, a clearing phase, and a gray level control phase are used when changing the gray levels of pixels. A plurality of pixels are aligned to a predetermined gray level in the adjustment phase. In the adjustment phase, the gray level of a pixel is changed earlier the greater a gray level difference between the gray level of the pixel and the predetermined gray level is.Type: ApplicationFiled: March 4, 2014Publication date: September 11, 2014Applicant: SEIKO EPSON CORPORATIONInventors: Hiroaki KANAMORI, Atsushi MIYAZAKI, Toshimichi YAMADA, Kota MUTO
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Publication number: 20140247290Abstract: In order to achieve a desired gray level in an optical state of a bi-stable display element, voltage application is carried out so that the gray level follows a predetermined gray level change loop through a erasing period, a reset period, and a write period.Type: ApplicationFiled: February 28, 2014Publication date: September 4, 2014Applicant: SEIKO EPSON CORPORATIONInventors: Atsushi MIYAZAKI, Toshimichi YAMADA, Kota MUTO, Hiroaki KANAMORI
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Patent number: 8786644Abstract: A control device includes output means for outputting a signal for controlling an electro-optical device having a plurality of pixels which are provided so as to correspond to intersections of a plurality of scanning lines and a plurality of data lines, to the electro-optical device, and control means for controlling the output means to output a signal for applying a voltage corresponding to data stored in a memory to the plurality of data lines, whereby an image which is written by the signal when a first condition is satisfied has a higher spatial frequency of grayscale variations in an extending direction of the data lines than that of an image which is written by the signal when a second condition is satisfied.Type: GrantFiled: March 16, 2012Date of Patent: July 22, 2014Assignee: Seiko Epson CorporationInventors: Kota Muto, Yusuke Yamada
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Patent number: 8587503Abstract: An electro-optical device includes a display unit that includes a plurality of arranged pixels and a control unit that drives the display unit. When a part or the entirety of the display unit is displayed in a single gradation, the control unit performs a first elimination operation of selectively driving a first pixel group including the pixels displayed in gradations other than a first gradation to change the pixels included in the first pixel group to the first gradation, and a second elimination operation of selectively driving a second pixel group including the pixels positioned on the outline of an area formed of the first pixel group and the plurality of pixels provided adjacent to the area formed of the first pixel group and surrounding the area to change the pixels included in the second pixel group to the first gradation.Type: GrantFiled: March 1, 2011Date of Patent: November 19, 2013Assignee: Seiko Epson CorporationInventors: Kota Muto, Masato Nishizawa
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Publication number: 20130229445Abstract: When a write operation to change the pixel into one of the first gray level and the second gray level is stopped before completion of the write operation, and when a write section executes a write operation to change the pixel into another of the first gray level and the second gray level, the write section executes the write operation by voltage application to change the pixel into the other gray level the same number of times of voltage application as the number of times of voltage application in the write operation that has been stopped.Type: ApplicationFiled: February 21, 2013Publication date: September 5, 2013Applicant: SEIKO EPSON CORPORATIONInventors: Yusuke Yamada, Kota Muto
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Publication number: 20120287174Abstract: A control method of an electro-optical device includes: performing a first supply process for supplying an electric potential corresponding to the changed gray level to a pixel electrode of a first pixel; performing a second supply process for supplying the same electric potential as an electric potential of a counter electrode to a pixel electrode of a second pixel; extracting a contour image from a difference between an image before the image rewriting and an image after the image rewriting; determining whether or not the first supply process is being performed, in units of a pixel, for contour display pixels that display the contour image; and performing a contour elimination process for supplying an electric potential for eliminating the contour image to the pixel electrode of a pixel, for which it is determined that the first supply process is not being performed, among the contour display pixels.Type: ApplicationFiled: May 1, 2012Publication date: November 15, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Atsushi MIYAZAKI, Kota MUTO
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Publication number: 20120262505Abstract: A method of controlling an electro-optical device includes, during image rewriting, executing a first control operation to supply a potential different from a potential on a counter electrode to a pixel electrode of a first pixel in a plurality of frame periods, executing a second control operation to supply the same potential as the potential on the counter electrode to a pixel electrode of a second pixel, which is adjacent to the first pixel and in which a gradation to be displayed during image rewriting is not changed, in at least some frame periods of a plurality of frame periods, and executing a third control operation to supply a potential different from the potential on the counter electrode to the pixel electrode of the second pixel in a frame period after the potential has been supplied in at least one frame period during the first control operation.Type: ApplicationFiled: April 10, 2012Publication date: October 18, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Kota MUTO, Yusuke YAMADA, Toshimichi YAMADA, Hiroaki KANAMORI
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Publication number: 20120242715Abstract: A control device includes output means for outputting a signal for controlling an electro-optical device having a plurality of pixels which are provided so as to correspond to intersections of a plurality of scanning lines and a plurality of data lines, to the electro-optical device, and control means for controlling the output means to output a signal for applying a voltage corresponding to data stored in a memory to the plurality of data lines, whereby an image which is written by the signal when a first condition is satisfied has a higher spatial frequency of grayscale variations in an extending direction of the data lines than that of an image which is written by the signal when a second condition is satisfied.Type: ApplicationFiled: March 16, 2012Publication date: September 27, 2012Applicant: Seiko Epson CorporationInventors: Kota Muto, Yusuke Yamada
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Publication number: 20120194570Abstract: A control device for a display unit that includes pixels each having display elements is disclosed. The control device comprising a control unit counting sections where pixels with different gradations are placed next to each other in a predetermined region among an image to be displayed on the display unit. The control unit outputs an instruction to execute a refresh drive in the predetermined region when an integrated value of the sections exceeds a predetermined value.Type: ApplicationFiled: January 17, 2012Publication date: August 2, 2012Applicant: Seiko Epson CorporationInventors: Kota Muto, Yusuke Yamada
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Publication number: 20120050349Abstract: A display device changes the gray scale of a pixel by performing a write operation in which a voltage is applied to the pixel a plurality of times. In a case where the display state of the pixel is changed based on image data written into a memory, the display device determines whether or not the pixel of which the display state is changed is in the middle of the write operation. The display device starts the write operation for the pixel that is not in the middle of the write operation. On the other hand, for the pixel that is in the middle of the write operation, the display device, after completion of the write operation that is in the middle of the process, starts a new write operation for the pixel so as to have a gray scale determined based on the image data.Type: ApplicationFiled: August 26, 2011Publication date: March 1, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Yusuke YAMADA, Kota MUTO, Masato NISHIZAWA
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Publication number: 20120044232Abstract: A control device that controls the driving of a display device which changes display states by a writing operation of applying a driving voltage several times, wherein the control device includes a determining portion that determines whether or not the writing operation is performed for each pixel; and a control portion that starts the writing operation in the pixel in which the writing operation is determined to be performed by the determining portion, the writing operation including applying, wherein, in a case where a previous writing operation is not performed on the pixel in which the writing operation is determined to be performed by the determining portion, the control portion starts the writing operation, and in a case where the previous writing operation is performed on the pixel, the control portion starts the next writing operation after the previous writing operation is finished.Type: ApplicationFiled: August 20, 2011Publication date: February 23, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Yusuke YAMADA, Kota MUTO
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Publication number: 20110261031Abstract: In an electro-optical device including: a plurality of scanning lines; a plurality of data lines intersecting the plurality of scanning lines; and a plurality of pixels arranged at positions corresponding to the intersections of the plurality of scanning lines and the plurality of data lines, a method of driving the electro-optical device when refreshing only a part of the plurality of pixels includes: during a first period, selecting the scanning lines connected to part of the pixels and inputting display image data to the part of the pixels through the data lines; and during a second period, selecting the scanning lines which are not connected to the part of the pixels, wherein a period in which the respective scanning lines are selected during the second period is shorter than a period in which the respective scanning lines are selected during the first period.Type: ApplicationFiled: April 6, 2011Publication date: October 27, 2011Applicant: SEIKO EPSON CORPORATIONInventor: Kota MUTO
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Publication number: 20110249041Abstract: A method of driving an electrophoretic display device includes changing the gradation level of image data on the basis of correction data corresponding to the gradation level, converting image data with the changed gradation level to a dithering pattern, in which the first color and the second color are combined, corresponding to the changed gradation level for each predetermined region of image data, and driving the electrophoretic particles of the first color and the electrophoretic particles of the second color on the basis of image data converted to the dithering pattern for the plurality of pixels in the display section.Type: ApplicationFiled: April 7, 2011Publication date: October 13, 2011Applicant: Seiko Epson CorporationInventors: Tetsuaki Otsuki, Kota Muto
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Publication number: 20110242147Abstract: An electro-optical device includes a control unit that controls a display unit having a plurality of pixels. The control unit performs a differential driving operation of performing an operation of erasing a first image component which is a part of a display image in a first display state and an operation of displaying a second image component which is a part of a display image in a second display state by selectively driving the pixels having different gray scales in the first display state and the second display state when the display unit is changed from the first display state to the second display state. The operation of erasing the first image component includes an extended erasing operation of driving a first pixel group which includes the pixels constituting the first image component and the pixels being adjacent to the first image component and surrounding the first image component.Type: ApplicationFiled: March 31, 2011Publication date: October 6, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Kota MUTO, Masato Nishizawa
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Publication number: 20110221732Abstract: An electro-optical device includes a display unit that includes a plurality of arranged pixels and a control unit that drives the display unit. When a part or the entirety of the display unit is displayed in a single gradation, the control unit performs a first elimination operation of selectively driving a first pixel group including the pixels displayed in gradations other than a first gradation to change the pixels included in the first pixel group to the first gradation, and a second elimination operation of selectively driving a second pixel group including the pixels positioned on the outline of an area formed of the first pixel group and the plurality of pixels provided adjacent to the area formed of the first pixel group and surrounding the area to change the pixels included in the second pixel group to the first gradation.Type: ApplicationFiled: March 1, 2011Publication date: September 15, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Kota MUTO, Masato NISHIZAWA
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Patent number: 7834839Abstract: An image display device for displaying an image on a display panel is provided. The image display device includes a temperature variation rate detecting unit that detects a temperature variation rate of the display panel; a driving condition setting unit that sets driving conditions so as to display the image on the display panel in accordance with an image data of the image; a driving condition changing unit that changes the set driving conditions in accordance with the detected temperature variation rate; and a display panel driving unit that displays the image on the display panel by driving the display panel with the driving conditions changed by the driving condition changing unit.Type: GrantFiled: April 2, 2007Date of Patent: November 16, 2010Assignee: Seiko Epson CorporationInventors: Kota Muto, Munenori Sawada
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Patent number: 7804477Abstract: An image display apparatus that displays an image on a display includes: a temperature measuring unit that measures temperatures of a plurality of display regions of the display; a determining unit that determines whether or not a temperature difference between one of the plurality of display regions and the other display regions is larger than a threshold value on the basis of the temperatures measured by the temperature measuring unit; a driving condition setting unit that sets a driving condition for displaying the image on the display according to image data of the image; a driving condition changing unit that, in a case when the determining unit determines that the temperature difference is larger than the threshold value, changes the set driving condition to a driving condition different from that in a case in which the temperature difference is determined to be equal to or smaller than the threshold value; and a display driving unit that drives the display under the driving condition changed by the driType: GrantFiled: April 3, 2007Date of Patent: September 28, 2010Assignee: Seiko Epson CorporationInventors: Munenori Sawada, Kota Muto
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Publication number: 20100238145Abstract: An electro-optical apparatus includes a display unit including a plurality of pixels, a plurality of pixel electrodes, each of the plurality of pixel electrodes being provided for the pixel, a common electrode facing the plurality of pixel electrodes, an electro-optical layer disposed between the plurality of pixel electrodes and the common electrode, a plurality of holding capacitors, each of the plurality of holding capacitors being provided for the pixel, a capacitance line connected to the electrode of the holding capacitor, and a control unit that controls the potentials of the plurality of pixel electrodes, the common electrode, and the capacitance line.Type: ApplicationFiled: March 4, 2010Publication date: September 23, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Kota MUTO, Yuko KOMATSU, Kazunori HIRAMATSU