Patents by Inventor Michiaki Takeda
Michiaki Takeda 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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Publication number: 20230257605Abstract: A colored dispersion for inkjet and a method for producing the same, the colored dispersion including a colorant, a dispersant, a tellurium compound, and water, in which the dispersant is an A-B block polymer; monomers constituting an A block are (meth)acrylic acid and butyl (meth)acrylate; the content of the (meth)acrylic acid in the A block is 26-42 mass %; a monomer constituting a B block includes cyclohexyl (meth)acrylate; the acid value of the dispersant is 100-159 mg KOH/g; and the mass-average molecular weight of the dispersant is 10,000-50,000. An inkjet recording ink containing the dispersion; an inkjet recording method using the ink; recording media to which the ink adheres; and an inkjet printer equipped with a container containing the ink.Type: ApplicationFiled: July 29, 2021Publication date: August 17, 2023Inventors: Yuki KAJI, Maiko IWAMI, Michiaki TAKEDA, Aiko MATSUMURA
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Publication number: 20220315783Abstract: An ink which comprises a water-insoluble colorant, a dispersant, a polymer resin, and water. The polymer resin is one of four monomers which are methacrylic acid and three monomers selected respectively from among C1- to C4-alkyl methacrylates, C6- to C10-alkyl acrylates, and unsaturated C2- to C4-alkyl methacrylates; and a reactive emulsifier having a radical-polymerizable double bond in the molecule. An ink-jet recording method in which the ink is used; a recording medium to which the ink has been adhered; and an ink-jet printer including a vessel filled with the ink.Type: ApplicationFiled: July 3, 2020Publication date: October 6, 2022Inventors: Ha SAI, Shogo TODA, Michiaki TAKEDA, Hirotoshi TAKAHASHI
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Patent number: 9727166Abstract: A touch panel controller is equipped with a control unit that outputs a decimation signal to a drive line driving circuit when touch response magnitude data is a designated value or greater, or in other words, when the distance between a touch panel and a stylus pen is closer than a designated value. Thus, it is possible to realize a touch panel system able to moderate the amount of power consumed when synchronizing drive timings between the pen and the touch panel controller that drives the touch panel, and thereby operate with low power consumption.Type: GrantFiled: July 1, 2014Date of Patent: August 8, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Michiaki Takeda, Mamoru Takaya
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Publication number: 20170192549Abstract: Driving of a stylus pen is satisfactorily controlled even when the touch panel controller and the stylus pen are not connected through a wire. A touch panel (2) is driven by a touch panel controller (4), and is given with an input operation from a stylus pen (3) that is able to transmit and receive information to and from the touch panel controller (4) via wireless communication. The touch panel controller (4) includes a timing generator (14) that generates a synchronization signal to synchronize drive timing of the stylus pen (3) and drive timing of the touch panel (2) with each other, and an information signal generating unit (19) that generates an information signal representing a drive state of the touch panel (2). The information signal is transferred from the touch panel controller (4) to the stylus pen (3) subsequent to the synchronization signal.Type: ApplicationFiled: May 18, 2015Publication date: July 6, 2017Applicant: SHARP KABUSHIKI KAISHAInventors: Takahiro KATAYAMA, Michiaki TAKEDA, Mamoru TAKAYA
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Publication number: 20170123568Abstract: Sensitivity of a stylus pen to a touch panel is stabilized. The stylus pen (3) includes a pen tip (31) which is provided to be movable in an axial direction in accordance with a writing pressure and a writing pressure sensor (31d) which generates a signal corresponding to the amount of movement of the pen tip (31). A threshold updating circuit (40) is provided to update a threshold for determining, by the writing pressure sensor (31d), presence or absence of the writing pressure on the basis of a distance between the stylus pen (3) and the touch panel.Type: ApplicationFiled: June 22, 2015Publication date: May 4, 2017Applicant: SHARP KABUSHIKI KAISHAInventors: Michiaki TAKEDA, Takahiro KATAYAMA, Mamoru TAKAYA
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Publication number: 20170108984Abstract: Provided is a touch panel system capable of minimizing the possibility of a stylus pen failing to detect a synchronization signal. A touch panel controller (4) in the touch panel system generates a preparation signal including a high state and a low state that acts as a reference for adjusting the reception sensitivity of the synchronization signal in the stylus pen, and outputs the preparation signal to the touch panel earlier than the timing at which to output the synchronization signal to the touch panel.Type: ApplicationFiled: May 19, 2015Publication date: April 20, 2017Applicant: SHARP KABUSHIKI KAISHAInventors: Mamoru TAKAYA, Michiaki TAKEDA, Takahiro KATAYAMA
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Patent number: 9501091Abstract: In a touch panel system of the present invention, a touch pen is configured of an electronic pen that signals can be input into and output from. A touch panel controller includes a synchronization signal transmission unit that transmits a synchronization signal to the electronic pen during synchronization signal transmission periods immediately before each of a first signal line drive period and a second signal line drive period. The synchronization signal transmission unit transmits the synchronization signal of which the waveform is configured of a Manchester-coded pseudorandom sequence having periodicity to the electronic pen during the synchronization signal transmission period. The electronic pen includes a synchronization signal detecting unit that detects the synchronization signal.Type: GrantFiled: May 16, 2014Date of Patent: November 22, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Michiaki Takeda, Mamoru Takaya
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Patent number: 9495056Abstract: In a touch panel system (1) of the present invention, a stylus pen (3) produces output that indicates that a quantitative characteristic value is increased from the characteristic value of a previous output by using a waveform that corresponds to an (L+1)-th drive line (DLL+1) other than L numbers of drive lines (DL1 to DLL) and, meanwhile, produces output that indicates that the quantitative characteristic value is decreased from the characteristic value of the previous output by using a waveform that corresponds to an (L+2)-th drive line (DLL+2) other than the L numbers of drive lines (DL1 to DLL).Type: GrantFiled: May 16, 2014Date of Patent: November 15, 2016Assignee: SHARP KABUSHIKI KAISHAInventor: Michiaki Takeda
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Publication number: 20160139732Abstract: A touch panel controller is equipped with a control unit that outputs a decimation signal to a drive line driving circuit when touch response magnitude data is a designated value or greater, or in other words, when the distance between a touch panel and a stylus pen is closer than a designated value. Thus, it is possible to realize a touch panel system able to moderate the amount of power consumed when synchronizing drive timings between the pen and the touch panel controller that drives the touch panel, and thereby operate with low power consumption.Type: ApplicationFiled: July 1, 2014Publication date: May 19, 2016Applicant: SHARP KABUSHIKI KAISHAInventors: Michiaki TAKEDA, Mamoru TAKAYA
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Publication number: 20160117019Abstract: In a touch panel system (1) of the present invention, a stylus pen (3) produces output that indicates that a quantitative characteristic value is increased from the characteristic value of a previous output by using a waveform that corresponds to an (L+1)-th drive line (DLL+1) other than L numbers of drive lines (DL1 to DLL) and, meanwhile, produces output that indicates that the quantitative characteristic value is decreased from the characteristic value of the previous output by using a waveform that corresponds to an (L+2)-th drive line (DLL+2) other than the L numbers of drive lines (DL1 to DLL).Type: ApplicationFiled: May 16, 2014Publication date: April 28, 2016Applicant: SHARP KABUSHIKI KAISHAInventor: Michiaki TAKEDA
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Publication number: 20160110015Abstract: A touch panel system includes a touch panel which includes a plurality of horizontal signal lines and a plurality of vertical signal lines, a touch panel controller which controls the touch panel, and a touch pen. The touch panel controller drives the horizontal signal lines in one of successive two frame periods and drives the horizontal signal lines or the vertical signal lines in the other of the frame periods, the touch pen outputs a state signal about a state of the touch pen in each frame period, and a first item representing a state of the touch pen is expressed by a plurality of state signals which are outputted in a plurality of successive frame periods.Type: ApplicationFiled: May 28, 2014Publication date: April 21, 2016Applicant: SHARP KABUSHIKI KAISHAInventors: Mamoru TAKAYA, Michiaki TAKEDA
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Publication number: 20160098124Abstract: In a touch panel system (1) of the present invention, a stylus pen (3) is configured of an electronic pen that outputs at least two types of the states of a first pen function signal and a second pen function signal for different functions. The stylus pen (3) is provided with a controller circuit that produces output with a drive pattern which indicates the state of the first pen function signal each time of or once in a plurality of one of a first signal line drive period and a second signal line drive period and that produces output with a drive pattern which indicates the state of the second pen function signal each time of or once in a plurality of the other of the first signal line drive period and the second signal line drive period when outputting the state of the first pen function signal and the state of the second pen function signal.Type: ApplicationFiled: May 20, 2014Publication date: April 7, 2016Applicant: SHARP KABUSHIKI KAISHAInventor: Michiaki TAKEDA
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Publication number: 20160091919Abstract: In a touch panel system of the present invention, a touch pen is configured of an electronic pen that signals can be input into and output from. A touch panel controller includes a synchronization signal transmission unit that transmits a synchronization signal to the electronic pen during synchronization signal transmission periods immediately before each of a first signal line drive period and a second signal line drive period. The synchronization signal transmission unit transmits the synchronization signal of which the waveform is configured of a Manchester-coded pseudorandom sequence having periodicity to the electronic pen during the synchronization signal transmission period. The electronic pen includes a synchronization signal detecting unit that detects the synchronization signal.Type: ApplicationFiled: May 16, 2014Publication date: March 31, 2016Applicant: SHARP KABUSHIKI KAISHAInventors: Michiaki TAKEDA, Mamoru TAKAYA
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Publication number: 20150363043Abstract: A touch panel device (1) detecting a finger operation and a pen operation, the touch panel device includes: a touching object determining section (23) for determining whether or not a touch operation is the finger operation or the pen operation, depending on (a) whether or not a value outputted from a sensor is within a range indicated by a finger threshold value and (b) whether or not the value outputted from the sensor is within a range indicated by a pen threshold value, the touching object determining section (23) making no determination as to whether or not the touch operation in an Lp area is the pen operation but making a determination only as to whether or not the touch operation in the Lp area is the finger operation, depending on whether or not the value outputted from the sensor is in the range indicated by the finger threshold value.Type: ApplicationFiled: January 9, 2014Publication date: December 17, 2015Applicant: SHARP KABUSHIKI KAISHAInventors: Kenichirou MIKAMI, Shinichi YOSHIDA, Masayuki YAMAGUCHI, Michiaki TAKEDA
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Publication number: 20150161932Abstract: In the present invention, when a main screen and one or more secondary screens are displayed, the screen luminance for the main screen can be suitably controlled without being affected by video signal for the secondary screens. A video display device (1) is provided with an LED backlight (7) that illuminates an LCD panel (5) and an area active control portion (3) that controls the light emission luminance of the LED backlight (7). The area active control portion (3) divides the LED backlight (7) into a plurality of areas and controls the light emission luminance of the LEDs corresponding to each area according to the video signal corresponding to each area.Type: ApplicationFiled: March 19, 2013Publication date: June 11, 2015Inventors: Hiroyoshi Kure, Michiaki Takeda
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Patent number: 9001166Abstract: The present invention effectively suppresses not only occurrences of halos but also degradation of the black level. This image display device has a liquid crystal panel (17) that displays images according to an image signal and a backlight (14) in which LEDs are used and controls the light emission brightness of the LEDs for each division region, which is obtained by dividing the backlight (14) into a plurality of regions, on the basis of a prescribed relation between a gradation value for an image region corresponding to each division region and the LED light emission brightness.Type: GrantFiled: June 27, 2012Date of Patent: April 7, 2015Assignee: Sharp Kabushiki KaishaInventors: Michiaki Takeda, Eishi Oda, Hiroyoshi Kure
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Patent number: 8963826Abstract: Light leakage and black float are reduced in dark ambient while a perception of high contrast is achieved when a backlight is divided into a plurality of areas and backlight brightness is controlled depending on a video signal corresponding to each area. An area active control portion (2) divides a video signal into a plurality of areas and outputs a first feature value for each area. An LED control portion (3) acquires a first brightness for each divided area of an LED backlight (5) depending on the first feature value of each area, and acquires a second brightness for each area that is acquired by uniformly multiplying a specific multiplying factor acquired depending on the lighting ratio of the LED backlight (5) with respect to the first brightness within a range where a total value of the LED driving current does not exceed a predetermined permissible current value.Type: GrantFiled: May 10, 2012Date of Patent: February 24, 2015Assignee: Sharp Kabushiki KaishaInventors: Eishi Oda, Michiaki Takeda, Hiroyoshi Kure
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Publication number: 20140160180Abstract: Light leakage and black float are reduced in dark ambient while a perception of high contrast is achieved when a backlight is divided into a plurality of areas and backlight brightness is controlled depending on a video signal corresponding to each area. An area active control portion (2) divides a video signal into a plurality of areas and outputs a first feature value for each area. An LED control portion (3) acquires a first brightness for each divided area of an LED backlight (5) depending on the first feature value of each area, and acquires a second brightness for each area that is acquired by uniformly multiplying a specific multiplying factor acquired depending on the lighting ratio of the LED backlight (5) with respect to the first brightness within a range where a total value of the LED driving current does not exceed a predetermined permissible current value.Type: ApplicationFiled: May 10, 2012Publication date: June 12, 2014Applicant: SHARP KABUSHIKI KAISHAInventors: Eishi Oda, Michiaki Takeda, Hiroyoshi Kure
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Publication number: 20140160181Abstract: The present invention effectively suppresses not only occurrences of halos but also degradation of the black level. This image display device has a liquid crystal panel (17) that displays images according to an image signal and a backlight (14) in which LEDs are used and controls the light emission brightness of the LEDs for each division region, which is obtained by dividing the backlight (14) into a plurality of regions, on the basis of a prescribed relation between a gradation value for an image region corresponding to each division region and the LED light emission brightness.Type: ApplicationFiled: June 27, 2012Publication date: June 12, 2014Applicant: SHARP KABUSHIKI KAISHAInventors: Michiaki Takeda, Eishi Oda, Hiroyoshi Kure