Patents by Inventor Genshiro Kawachi
Genshiro Kawachi 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: 20180069029Abstract: Provided is a liquid crystal display device, including: an array substrate; a plurality of pixels sectioned by video signal lines and scanning signal lines formed on the array substrate; a TFT arranged for each of the plurality of pixels; and a pixel electrode arranged inside each of the plurality of pixels. The TFT includes a channel semiconductor layer and the pixel electrode that are formed of a seamless layer made of an oxide semiconductor. The pixel electrode has an electrical conductivity larger than an electrical conductivity of the channel semiconductor layer under a state in which a gate voltage is not applied.Type: ApplicationFiled: November 13, 2017Publication date: March 8, 2018Inventor: Genshiro KAWACHI
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Publication number: 20180005595Abstract: Provided is a liquid crystal display device, including: a plurality of scanning connection lines formed on at least one side of edges of the image display region, the plurality of scanning connection lines connecting together a scanning signal drive circuit and a plurality of scanning signal lines; a selection circuit formed so as to be interposed between the plurality of scanning connection lines and the plurality of scanning signal lines, the selection circuit being configured to selectively short-circuit one of a plurality of the scanning signal lines to one of the plurality of scanning connection lines based on a selection signal; and a selection signal line connected to the selection circuit, the selection signal line transmitting the selection signal to the selection circuit.Type: ApplicationFiled: September 18, 2017Publication date: January 4, 2018Inventors: Genshiro KAWACHI, Kazuo KITA
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Publication number: 20170373131Abstract: In an organic electroluminescent light emitting display device comprising a plurality of pixels each of which includes an organic electroluminescent element emitting light by a current supplied thereto, a plurality of active elements including a first active element which acquires a data signal and a second active element which regulates the current supplied to the organic electroluminescent element in accordance with the data signal, and a capacitive element storing the data signal, the present invention utilizes a part of the capacitive element arranged in one of the pixels for a light shielding member which shields the plurality of active elements arranged the one of the pixels from light emitted by the organic electroluminescent element arranged therein or another pixel adjacent thereto so as to suppress image quality deterioration and smear appearing in an image display area of the organic electroluminescent light emitting display device.Type: ApplicationFiled: September 8, 2017Publication date: December 28, 2017Inventors: Toshihiro SATO, Genshiro KAWACHI, Yoshiro MIKAMI, Masaya ADACHI
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Patent number: 9847350Abstract: Provided is a liquid crystal display device, including: an array substrate; a plurality of pixels sectioned by video signal lines and scanning signal lines formed on the array substrate; a TFT arranged for each of the plurality of pixels; and a pixel electrode arranged inside each of the plurality of pixels. The TFT includes a channel semiconductor layer and the pixel electrode that are formed of a seamless layer made of an oxide semiconductor. The pixel electrode has an electrical conductivity larger than an electrical conductivity of the channel semiconductor layer under a state in which a gate voltage is not applied.Type: GrantFiled: November 12, 2014Date of Patent: December 19, 2017Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventor: Genshiro Kawachi
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Patent number: 9792870Abstract: Provided is a liquid crystal display device, including: a plurality of scanning connection lines formed on at least one side of edges of the image display region, the plurality of scanning connection lines connecting together a scanning signal drive circuit and a plurality of scanning signal lines; a selection circuit formed so as to be interposed between the plurality of scanning connection lines and the plurality of scanning signal lines, the selection circuit being configured to selectively short-circuit one of a plurality of the scanning signal lines to one of the plurality of scanning connection lines based on a selection signal; and a selection signal line connected to the selection circuit, the selection signal line transmitting the selection signal to the selection circuit.Type: GrantFiled: October 10, 2014Date of Patent: October 17, 2017Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Genshiro Kawachi, Kazuo Kita
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Patent number: 9760221Abstract: An embedded touch screen, including: a first substrate including, on a front surface thereof, a plurality of detecting electrodes extending in a second direction; a second substrate having an image region in which a plurality of pixels are arranged in matrix, the second substrate including: a pixel electrode connected to corresponding one of the plurality of video signal lines via a switching element connected to corresponding one of the plurality of scanning signal lines in each of the plurality of pixels; and a common electrode; a liquid crystal layer sandwiched between the first substrate and the second substrate; an application circuit for applying an alternating signal to the pixel electrode; a detection circuit for detecting a signal excited on the corresponding one of the plurality of detecting electrodes; and a scanning circuit for scanning the pixel electrode in the second direction during detection by the detection circuit.Type: GrantFiled: November 19, 2014Date of Patent: September 12, 2017Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Genshiro Kawachi, Kazuo Kita, Kikuo Ono
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Patent number: 9651836Abstract: A first substrate of a display device includes a plurality of signal lines which are arranged in an image display area and a plurality of driving circuits which drive the plurality of signal lines, the driving circuit is electrically connected to a metal line which is formed in the first substrate in an area of the first substrate overlapping the driving circuit in planar view, the metal line is electrically connected via a contact hole, in the area, to a lead-out line which is formed in a layer different from that of the metal line in the first substrate, the lead-out line is extended to the outside of the area and electrically connected to the signal line.Type: GrantFiled: February 26, 2014Date of Patent: May 16, 2017Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Kazuo Kita, Ryutaro Oke, Genshiro Kawachi
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Patent number: 9653495Abstract: A method of manufacturing a display device includes: forming a gate electrode on a substrate; forming a gate insulating film on the substrate; forming an oxide semiconductor on the substrate; forming a source electrode and a drain electrode on the substrate; forming a passivation film on the substrate; forming a common electrode on the substrate; forming an interlayer insulating film on the substrate; forming a pixel electrode on the substrate; forming an alignment film on the substrate; radiating UV-rays onto the oxide semiconductor; and heat-treating the oxide semiconductor irradiated with the UV-rays. The radiating UV-rays is performed after the forming an oxide semiconductor, and the heat-treating is performed after the forming a passivation film.Type: GrantFiled: April 13, 2015Date of Patent: May 16, 2017Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hironori Yasukawa, Genshiro Kawachi, Tomoya Kato, Kazuo Kita
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Publication number: 20170092219Abstract: A display device comprises: data lines extending in a first direction; gate lines extending in a second direction, and being divided into groups each of which has the gate lines adjacent in the first direction; selection signal supplying wirings each of which is provided in each group, and connected to each control electrode of the selector transistors corresponding to the group; gate voltage supplying wirings connected to the other conductive electrode of each of the selector transistors corresponding to the group; and wherein a gate driver supplies a second gate voltage having a voltage level lower than that of a first gate voltage to at least one of the gate voltage supplying wirings in each of the groups before supplying the first gate voltage in order to turn on a pixel transistor disposed in an intersection portion of the data line and the gate line.Type: ApplicationFiled: September 29, 2016Publication date: March 30, 2017Inventors: Yoshihisa OOISHI, Daisuke KAJITA, Genshiro KAWACHI, Sachiko YAMAZAKI, Kuniaki AMANO
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Patent number: 9483987Abstract: Provided is an embedded touch screen, including: a first substrate; a second substrate including: scanning signal lines extending in a first direction; video signal lines extending in a second direction; a plurality of pixels each including a pixel electrode connected to corresponding one of the video signal lines via a switching element connected to corresponding one of the scanning signal lines; and a common electrode; a liquid crystal layer; an application circuit for applying an alternating signal to a plurality of excitation electrodes; a detection circuit for detecting a signal excited on a plurality of detection electrodes each arranged adjacent to each of the plurality of excitation electrodes; and a scanning circuit for scanning at least one of each of the plurality of excitation electrodes and each of the plurality of detection electrodes at least in the second direction.Type: GrantFiled: February 19, 2013Date of Patent: November 1, 2016Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Genshiro Kawachi, Kazuo Kita, Kikuo Ono
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Publication number: 20160267866Abstract: A display apparatus includes an image display region having pixels sectioned by scanning signal lines and video signal lines, scanning connecting lines, thin film transistors, selection signal lines connected to gate electrodes of the thin film transistors, plural ones of the thin film transistors connected to different ones of the scanning connecting lines being connected to one of the selection signal lines; and a scanning signal drive circuit. The scanning signal drive circuit performs a normal scanning mode in which pulse signals are supplied in turn to plural ones of the scanning connecting lines connected to the one of the selection signal lines, and in the normal scanning mode, a fall timing of the gate-on voltage differs from a fall timing of a last one of the pulse signals supplied to the plural ones of the scanning connecting lines during the selection period.Type: ApplicationFiled: May 20, 2016Publication date: September 15, 2016Inventors: Yoshihisa OOISHI, Genshiro KAWACHI, Kazuo KITA, Toshikazu KOUDO, Hideyuki NAKANISHI
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Publication number: 20160267869Abstract: A display device includes an image display area that includes pixels sectioned by scanning signal lines and video signal lines, first scanning connection lines connected to scanning signal lines, first thin film transistors, first selection signal lines, second thin film transistors, second selection signal lines, and a scanning signal drive circuit connected to the first scanning connection lines, the first selection signal lines, and the second selection signal lines, wherein the scanning signal drive circuit sequentially supplies a pulse signal to the first scanning connection lines in a selection period in which a gate-on voltage is applied to the one of the first selection signal lines, and the scanning signal drive circuit applies a gate-off voltage to the one of the second selection signal lines corresponding to the one of the first selection signal lines to which the gate-on voltage is applied.Type: ApplicationFiled: May 19, 2016Publication date: September 15, 2016Inventors: Genshiro KAWACHI, Kazuo KITA, Yoshihisa OOISHI, Hideyuki NAKANISHI, Toshikazu KOUDO
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Patent number: 9178075Abstract: A thin-film semiconductor device includes a gate electrode formed above a substrate; a gate insulating film formed to cover the gate electrode; a semiconductor layer formed above the gate insulating film and having a channel region; a channel protective layer formed above the semiconductor layer and containing an organic material which includes silicon, oxygen, and carbon; an interfacial layer which is formed in contact with the channel protective layer between the semiconductor layer and the channel protective layer, and which includes carbon as a major component, the carbon originating from the organic material; and a source electrode and a drain electrode which are electrically connected to the semiconductor layer.Type: GrantFiled: February 27, 2012Date of Patent: November 3, 2015Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., JOLED INC.Inventors: Takahiro Kawashima, Hisao Nagai, Eiichi Satoh, Yuji Kishida, Genshiro Kawachi
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Patent number: 9166056Abstract: In a thin-film semiconductor device, a semiconductor layer has a bandgap energy of 1.6 eV or less, an insulating layer formed above the semiconductor layer includes: a first insulating layer region placed outside of a first contact opening and above one end of a gate electrode; a second insulating layer region placed outside of a second contact opening and above the other end of the gate electrode which opposes the one end; and a third insulating layer region being rectangular and placed between the first contact opening and the second contact opening.Type: GrantFiled: July 12, 2013Date of Patent: October 20, 2015Assignees: PANASONIC CORPORATION, PANASONIC LIQUID DISPLAY CO., LTD.Inventors: Hiroshi Hayashi, Takahiro Kawashima, Genshiro Kawachi
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Patent number: 9121829Abstract: A crystallinity evaluation method of evaluating crystallinity of a semiconductor film formed above a substrate includes following steps. First, a peak waveform of a Raman band in a Raman spectrum of the semiconductor film is obtained using Raman spectrometry. The Raman band corresponds to a phonon mode unique to the semiconductor film. The peak waveform is a wavelength range having a peak of the Raman band. Next, a first waveform is generated by fitting the obtained peak waveform by Gauss function. Then, a peak value of the first waveform is extracted. Then, a second waveform is generated by fitting the obtained peak waveform by Lorenz function based on the extracted peak value. Then, a peak value, a FWHM, and/or a wavelength indicating the peak value regarding the generated second waveform are obtained. Then, crystallinity of the semiconductor film is evaluated based on the obtained information.Type: GrantFiled: October 5, 2012Date of Patent: September 1, 2015Assignees: JOLED INC., PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.Inventors: Takahiro Kawashima, Genshiro Kawachi, Tomohiko Oda, Hikaru Nishitani
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Patent number: 9105209Abstract: In a liquid crystal display device, a data signal generation unit generates a data signal for controlling the orientation of liquid crystal. A plurality of transistors supply the data signal output from a source IC unit to a plurality of data signal lines of a liquid crystal display panel in a time sharing manner. A gate signal line controls each of the plurality of transistors. A fluctuation suppression unit is connected to the gate signal line that controls any one of the plurality of transistors, and suppresses, in accordance with a gate signal of the connected gate signal line, a voltage fluctuation in the data signal which occurs when another transistor changes from the ON state to the OFF state.Type: GrantFiled: December 7, 2012Date of Patent: August 11, 2015Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Kazuo Kita, Genshiro Kawachi
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Publication number: 20150221675Abstract: A method of manufacturing a display device includes: forming a gate electrode on a substrate; forming a gate insulating film on the substrate; forming an oxide semiconductor on the substrate; forming a source electrode and a drain electrode on the substrate; forming a passivation film on the substrate; forming a common electrode on the substrate; forming an interlayer insulating film on the substrate; forming a pixel electrode on the substrate; forming an alignment film on the substrate; radiating UV-rays onto the oxide semiconductor; and heat-treating the oxide semiconductor irradiated with the UV-rays. The radiating UV-rays is performed after the forming an oxide semiconductor, and the heat-treating is performed after the forming a passivation film.Type: ApplicationFiled: April 13, 2015Publication date: August 6, 2015Inventors: Hironori YASUKAWA, Genshiro KAWACHI, Tomoya KATO, Kazuo KITA
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Publication number: 20150116618Abstract: A first substrate of a display device includes a plurality of signal lines which are arranged in an image display area and a plurality of driving circuits which drive the plurality of signal lines, the driving circuit is electrically connected to a metal line which is formed in the first substrate in an area of the first substrate overlapping the driving circuit in planar view, the metal line is electrically connected via a contact hole, in the area, to a lead-out line which is formed in a layer different from that of the metal line in the first substrate, the lead-out line is extended to the outside of the area and electrically connected to the signal line.Type: ApplicationFiled: February 26, 2014Publication date: April 30, 2015Applicant: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Kazuo KITA, Ryutaro OKE, Genshiro KAWACHI
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Publication number: 20150077393Abstract: An embedded touch screen, including: a first substrate including, on a front surface thereof, a plurality of detecting electrodes extending in a second direction; a second substrate having an image region in which a plurality of pixels are arranged in matrix, the second substrate including: a pixel electrode connected to corresponding one of the plurality of video signal lines via a switching element connected to corresponding one of the plurality of scanning signal lines in each of the plurality of pixels; and a common electrode; a liquid crystal layer sandwiched between the first substrate and the second substrate; an application circuit for applying an alternating signal to the pixel electrode; a detection circuit for detecting a signal excited on the corresponding one of the plurality of detecting electrodes; and a scanning circuit for scanning the pixel electrode in the second direction during detection by the detection circuit.Type: ApplicationFiled: November 19, 2014Publication date: March 19, 2015Inventors: Genshiro KAWACHI, Kazuo KITA, Kikuo ONO
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Publication number: 20150069388Abstract: Provided is a liquid crystal display device, including: an array substrate; a plurality of pixels sectioned by video signal lines and scanning signal lines formed on the array substrate; a TFT arranged for each of the plurality of pixels; and a pixel electrode arranged inside each of the plurality of pixels. The TFT includes a channel semiconductor layer and the pixel electrode that are formed of a seamless layer made of an oxide semiconductor. The pixel electrode has an electrical conductivity larger than an electrical conductivity of the channel semiconductor layer under a state in which a gate voltage is not applied.Type: ApplicationFiled: November 12, 2014Publication date: March 12, 2015Inventor: Genshiro KAWACHI