Patents by Inventor Masahiro Tada
Masahiro Tada 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: 20160254276Abstract: A display device according to one embodiment, includes a thin-film transistor. The thin-film transistor includes a semiconductor layer including a channel region, first and second high-concentration impurity regions on both sides of the channel region, low-concentration impurity regions on both sides of the channel region, gate electrodes, first and second electrodes, and a light-shielding electrode opposing the channel region and the entire first high-concentration impurity region via an insulating layer, to produce a capacitance between itself and the first high-concentration impurity region.Type: ApplicationFiled: February 22, 2016Publication date: September 1, 2016Applicant: Japan Display Inc.Inventors: Masahiro TADA, Takashi NAKAMURA
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Patent number: 9411478Abstract: According to one embodiment, a display device includes a display panel having a counter substrate, an array substrate and a liquid crystal layer held therebetween, a counter electrode provided on the counter substrate, a pixel electrode arranged on the array substrate in a matrix, a sensor circuit arranged between rows of the plurality of pixel electrodes and configured to read out intensity of capacitive coupling between the sensor circuit and a dielectric, and a counter electrode drive circuit configured to pulsatively drive a common voltage added to the counter electrode during a period of driving the sensor circuit, wherein the sensor circuit comprises a detection electrode configured to form capacitance between the sensor circuit and the dielectric and to form capacitance between the sensor circuit and the counter electrode, and wherein the counter electrode comprises an aperture including at least a portion opposed to the detection electrode.Type: GrantFiled: April 21, 2014Date of Patent: August 9, 2016Assignee: Japan Display Inc.Inventors: Miyuki Ishikawa, Masahiro Tada, Takashi Nakamura, Yutaka Umeda, Hirotaka Hayashi, Yoshiro Aoki, Takanori Tsunashima
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Patent number: 9383880Abstract: According to one embodiment, a lateral-electric-field liquid crystal display device includes a light-emitting display layer including OLEDs and a driving circuit controlling light emission of the OLEDs, a moisture impermeable film provided to be laminated on the light-emitting display layer to prevent infiltration of moisture into the light-emitting display layer, an optical substrate provided separately from the moisture impermeable film and subjecting light from the light-emitting display region to optical processing, a first touch electrode group serving as one electrode group of touch electrodes and provided on a back surface of the optical substrate, and an extraction electrode group formed to be laminated on the moisture impermeable film, the extraction electrode group and the optical substrate have an overlapping part in plan view, and electrodes of the first touch electrode group being electrically connected to electrodes of the extraction electrode group in the overlapping part.Type: GrantFiled: January 14, 2016Date of Patent: July 5, 2016Assignee: Japan Display Inc.Inventors: Yoshiro Aoki, Takashi Nakamura, Masahiro Tada, Hirotaka Hayashi, Makoto Shibusawa, Yutaka Umeda, Miyuki Ishikawa
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Publication number: 20160132159Abstract: According to one embodiment, a lateral-electric-field liquid crystal display device includes a light-emitting display layer including OLEDs and a driving circuit controlling light emission of the OLEDs, a moisture impermeable film provided to be laminated on the light-emitting display layer to prevent infiltration of moisture into the light-emitting display layer, an optical substrate provided separately from the moisture impermeable film and subjecting light from the light-emitting display region to optical processing, a first touch electrode group serving as one electrode group of touch electrodes and provided on a back surface of the optical substrate, and an extraction electrode group formed to be laminated on the moisture impermeable film, the extraction electrode group and the optical substrate have an overlapping part in plan view, and electrodes of the first touch electrode group being electrically connected to electrodes of the extraction electrode group in the overlapping part.Type: ApplicationFiled: January 14, 2016Publication date: May 12, 2016Applicant: JAPAN DISPLAY INC.Inventors: Yoshiro AOKI, Takashi NAKAMURA, Masahiro TADA, Hirotaka HAYASHI, Makoto SHIBUSAWA, Yutaka UMEDA, Miyuki ISHIKAWA
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Patent number: 9335856Abstract: According to one embodiment, a display device includes a display pixel allocated at a matrix state in a display area, an image-reading device which detects strength of capacitive coupling by a dielectric material coming close to or making contact with the display area, and a control portion which controls each transistor of the image-reading device. The image-reading device includes a detection electrode which forms capacitance between the detection electrode and the dielectric material, a pre-charge gate line, a coupling pulse line, a readout gate line, a pre-charge line and a readout line. These lines supply a signal which drives the image-reading device. The image-reading device further includes a pre-charge transistor, an amplification transistor, a readout transistor, a compensation transistor, and a power-source switching transistor.Type: GrantFiled: January 10, 2014Date of Patent: May 10, 2016Assignee: Japan Display Inc.Inventors: Keiichi Saito, Hideyuki Takahashi, Takashi Nakamura, Satoru Tomita, Masahiro Tada, Hirotaka Hayashi, Takashi Okada, Yoshiro Aoki, Takanori Tsunashima
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Publication number: 20160116776Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes a light-shielding layer formed in the shape of a band, a first semiconductor layer, a second semiconductor layer, a gate line, a first pixel electrode and a second pixel electrode. A third region of the first semiconductor layer and a sixth region of the second semiconductor layer are each U-shaped, and each includes a first channel region and a second channel region, which are located opposite to the gate line.Type: ApplicationFiled: October 15, 2015Publication date: April 28, 2016Applicant: Japan Display Inc.Inventors: Hirotaka Hayashi, Masahiro Tada, Kazuhide Mochizuki
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Patent number: 9285911Abstract: According to one embodiment, a display device includes a display pixel allocated at a matrix state in a display area, an image-reading device which detects strength of capacitive coupling by a dielectric material coming close to or making contact with the display area, and a control portion which controls each transistor of the image-reading device. The image-reading device includes a detection electrode which forms capacitance between the detection electrode and the dielectric material, a pre-charge gate line, a coupling pulse line, a readout gate line, a pre-charge line and a readout line. These lines supply a signal which drives the image-reading device. The image-reading device further includes a pre-charge transistor, an amplification transistor, a readout transistor, a compensation transistor, and a power-source switching transistor.Type: GrantFiled: January 10, 2014Date of Patent: March 15, 2016Assignee: Japan Display Inc.Inventors: Keiichi Saito, Hideyuki Takahashi, Takashi Nakamura, Satoru Tomita, Masahiro Tada, Hirotaka Hayashi, Takashi Okada, Yoshiro Aoki, Takanori Tsunashima
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Patent number: 9262030Abstract: According to one embodiment, a lateral-electric-field liquid crystal display device includes a light-emitting display layer including OLEDs and a driving circuit controlling light emission of the OLEDs, a moisture impermeable film provided to be laminated on the light-emitting display layer to prevent infiltration of moisture into the light-emitting display layer, an optical substrate provided separately from the moisture impermeable film and subjecting light from the light-emitting display region to optical processing, a first touch electrode group serving as one electrode group of touch electrodes and provided on a back surface of the optical substrate, and an extraction electrode group formed to be laminated on the moisture impermeable film, the extraction electrode group and the optical substrate have an overlapping part in plan view, and electrodes of the first touch electrode group being electrically connected to electrodes of the extraction electrode group in the overlapping part.Type: GrantFiled: October 3, 2014Date of Patent: February 16, 2016Assignee: Japan Display Inc.Inventors: Yoshiro Aoki, Takashi Nakamura, Masahiro Tada, Hirotaka Hayashi, Makoto Shibusawa, Yutaka Umeda, Miyuki Ishikawa
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Publication number: 20160033829Abstract: There is provided a high-definition liquid crystal display device that can prevent flicker due to a reduction in the pixel potential in a low-frequency drive of about 10 Hz to reduce power consumption. The pixel has a TFT formed of Poly-Si as a switching element. In the pixel, a capacitance insulating film is formed on a planar first electrode on which a comb-shaped second electrode is formed. When the film thickness of the insulating film is d and the dielectric constant at 10 Hz frequency is ?, it is given that ?d?5×10?6 m at 10 Hz frequency. The capacitance insulating film does not have a hysteresis characteristic. The refractive index of the capacitance insulating film with respect to a light of a wavelength of 632.8 nm is 1.7 to 2.0.Type: ApplicationFiled: July 29, 2015Publication date: February 4, 2016Inventors: Toshiki KANEKO, Takashi NAKAMURA, Masahiro TADA, Yukio TANAKA, Hiroyuki KIMURA, Osamu ITOU
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Publication number: 20160005880Abstract: According to one embodiment, provided is a thin film transistor with which it is possible to reduce the leakage current and thereby, for a liquid crystal display device, to ensure a good display quality. The thin film transistor includes a semiconductor layer, gate electrodes, first light-blocking electrodes, and second light-blocking electrodes. The first light-blocking electrodes are disposed opposite to the gate electrodes with respect to the semiconductor layer and opposed to channel regions to block light incident into the channel regions. The second light-blocking electrodes are disposed opposite to the semiconductor layer with respect to the gate electrodes, arranged to block light incident into the channel regions, and electrically connected with one of a signal line and a pixel electrode.Type: ApplicationFiled: June 9, 2015Publication date: January 7, 2016Applicant: Japan Display Inc.Inventors: Masahiro TADA, Takashi NAKAMURA
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Patent number: 9176616Abstract: In one embodiment, a display device having a touch function includes an insulating substrate and a plurality of pixels formed on the insulating substrate and arranged in a matrix of rows and columns. The pixels form a plurality of pixel blocks formed of a plurality of rows and columns of the pixels. A sensor circuit is arranged in a space between adjacent pixels on the insulating substrate and includes a coupling electrode, a detection electrode arranged adjacent to the coupling electrode for forming a coupling capacitance therebetween, and a reading-out circuit to read out a potential of the detection electrode. At least one sensor circuit is arranged in each pixel block. The contact or non-contact by a fingertip or a nib is detected by a potential difference of the detection electrode.Type: GrantFiled: August 10, 2011Date of Patent: November 3, 2015Assignee: JAPAN DISPLAY, INC.Inventors: Takashi Nakamura, Satoru Tomita, Masayoshi Fuchi, Hirotaka Hayashi, Takayuki Imai, Takashi Okada, Takahiko Endo, Miyuki Ishikawa, Masahiro Tada, Yasuo Saruhashi, Keiichi Saito, Hideyuki Takahashi
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Publication number: 20150097810Abstract: According to one embodiment, a lateral-electric-field liquid crystal display device includes a light-emitting display layer including OLEDs and a driving circuit controlling light emission of the OLEDs, a moisture impermeable film provided to be laminated on the light-emitting display layer to prevent infiltration of moisture into the light-emitting display layer, an optical substrate provided separately from the moisture impermeable film and subjecting light from the light-emitting display region to optical processing, a first touch electrode group serving as one electrode group of touch electrodes and provided on a back surface of the optical substrate, and an extraction electrode group formed to be laminated on the moisture impermeable film, the extraction electrode group and the optical substrate have an overlapping part in plan view, and electrodes of the first touch electrode group being electrically connected to electrodes of the extraction electrode group in the overlapping part.Type: ApplicationFiled: October 3, 2014Publication date: April 9, 2015Applicant: Japan Display Inc.Inventors: Yoshiro AOKI, Takashi NAKAMURA, Masahiro TADA, Hirotaka HAYASHI, Makoto SHIBUSAWA, Yutaka UMEDA, Miyuki ISHIKAWA
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Publication number: 20140333852Abstract: According to one embodiment, a display device includes a display panel having a counter substrate, an array substrate and a liquid crystal layer held therebetween, a counter electrode provided on the counter substrate, a pixel electrode arranged on the array substrate in a matrix, a sensor circuit arranged between rows of the plurality of pixel electrodes and configured to read out intensity of capacitive coupling between the sensor circuit and a dielectric, and a counter electrode drive circuit configured to pulsatively drive a common voltage added to the counter electrode during a period of driving the sensor circuit, wherein the sensor circuit comprises a detection electrode configured to form capacitance between the sensor circuit and the dielectric and to form capacitance between the sensor circuit and the counter electrode, and wherein the counter electrode comprises an aperture including at least a portion opposed to the detection electrode.Type: ApplicationFiled: April 21, 2014Publication date: November 13, 2014Applicant: Japan Display Inc.Inventors: Miyuki ISHIKAWA, Masahiro Tada, Takashi Nakamura, Yutaka Umeda, Hirotaka Hayashi, Yoshiro Aoki, Takanori Tsunashima
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Patent number: 8872793Abstract: According to one embodiment, a sensor module includes a first sensor circuit, a second sensor circuit and a differential circuit. The first sensor circuit includes a first detection electrode, a first amplifier formed of a thin-film transistor and a first coupling capacitor. The second sensor circuit includes a second detection electrode, a second amplifier formed of a thin-film transistor and a second coupling capacitor. The differential circuit is connected to the drain electrode of the first amplifier and the drain electrode of the second amplifier.Type: GrantFiled: June 18, 2012Date of Patent: October 28, 2014Assignee: Japan Display Inc.Inventors: Masahiro Tada, Takashi Nakamura, Hirotaka Hayashi, Masayoshi Fuchi, Takahiko Endo, Miyuki Ishikawa, Takashi Okada, Takayuki Imai, Satoru Tomita, Yasuo Saruhashi
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Publication number: 20140225844Abstract: According to one embodiment, a touchpanel includes, a plurality of electrodes arranged in each of a first direction and a second direction on the touchpanel, a module configured to supply a signal for detecting a position of a conductor on the touchpanel to each of the electrodes, and configured to compute the position of the conductor based on a signal output from the electrode, a module configured to output a tactile signal to an electrode in a vicinity to the position of the conductor, a module configured to switch between a signal line from the touch detection module and a signal line from the tactile output module, and to connect the signal line to a signal line from each of the electrodes, and a control module configured to control operations of the modules.Type: ApplicationFiled: January 9, 2014Publication date: August 14, 2014Applicant: Japan Display Inc.Inventors: Masahiro TADA, Yutaka Umeda, Takashi Nakamura, Hirotaka Hayashi
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Publication number: 20140210777Abstract: According to one embodiment, a display device includes a display pixel allocated at a matrix state in a display area, an image-reading device which detects strength of capacitive coupling by a dielectric material coming close to or making contact with the display area, and a control portion which controls each transistor of the image-reading device. The image-reading device includes a detection electrode which forms capacitance between the detection electrode and the dielectric material, a pre-charge gate line, a coupling pulse line, a readout gate line, a pre-charge line and a readout line. These lines supply a signal which drives the image-reading device. The image-reading device further includes a pre-charge transistor, an amplification transistor, a readout transistor, a compensation transistor, and a power-source switching transistor.Type: ApplicationFiled: January 10, 2014Publication date: July 31, 2014Applicant: Japan Display Inc.Inventors: Keiichi SAITO, Hideyuki Takahashi, Takashi Nakamura, Satoru Tomita, Masahiro Tada, Hirotaka Hayashi, Takashi Okada, Yoshiro Aoki, Takanori Tsunashima
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Patent number: 8755668Abstract: According to one embodiment, a playback apparatus includes a decoder, a resolution receiver, and an image quality enhancer. The decoder configured to decode encoded first moving image data to generate second moving image data. The resolution receiver configured to receive a resolution of a display device on which a video image based on the second moving image data is displayed. The image quality enhancer configured to perform image quality enhancement processing to the second moving image data according to the resolution of the display device.Type: GrantFiled: May 17, 2011Date of Patent: June 17, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Kosuke Uchida, Masahiro Tada
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Publication number: 20130187888Abstract: According to one embodiment, a display device includes, a module which divides a display surface of the display device into a plurality of regions composed of a plurality of display pixels and a plurality of sensor circuits and which causes a part of the sensors in each of the regions to perform a normal operation of reading the magnitude of capacitive coupling, a module which causes the other sensor circuits in the same region to perform a correction operation of not reading the magnitude of capacitive coupling, and a module which determines the magnitude of capacitive coupling using the difference between output signals from the sensor circuits that perform the normal operation in the corresponding regions and output signals from the sensor circuits that perform the correction operation.Type: ApplicationFiled: December 21, 2012Publication date: July 25, 2013Inventors: Satoru TOMITA, Masahiro Tada, Takashi Okada, Hideyuki Takahashi, Miyuki Ishikawa, Takashi Nakamura
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Publication number: 20130187877Abstract: According to one embodiment, a display device includes a plurality of pixel circuits which are arranged in a matrix, a plurality of sensor circuits which are arranged in regions between the pixel circuits and which read the magnitude of capacitance coupling, a plurality of scanning lines for the pixel circuits and sensor circuits, a plurality of signal lines for the pixel circuits and sensor circuits a part of which are shared, a controller which controls alternating-current driving that inverts, with a specific period, the polarity of a display signal written into the pixel circuits, and a determination module which determines a magnitude correlation between a sensor signal read from the sensor circuit and a polarity-based threshold value corresponding to the polarity of alternating-current driving in reading the sensor signal.Type: ApplicationFiled: December 21, 2012Publication date: July 25, 2013Inventors: Masahiro TADA, Takashi Nakamura, Hirotaka Hayashi, Masayoshi Fuchi, Yasuo Saruhashi
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Publication number: 20130002603Abstract: According to one embodiment, a sensor module includes a first sensor circuit, a second sensor circuit and a differential circuit. The first sensor circuit includes a first detection electrode, a first amplifier formed of a thin-film transistor and a first coupling capacitor. The second sensor circuit includes a second detection electrode, a second amplifier formed of a thin-film transistor and a second coupling capacitor. The differential circuit is connected to the drain electrode of the first amplifier and the drain electrode of the second amplifier.Type: ApplicationFiled: June 18, 2012Publication date: January 3, 2013Inventors: Masahiro Tada, Takashi Nakamura, Hirotaka Hayashi, Masayoshi Fuchi, Takahiko Endo, Miyuki Ishikawa, Takashi Okada, Takayuki Imai, Satoru Tomita, Yasuo Saruhashi