Patents by Inventor Hiroko Sehata
Hiroko Sehata 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: 20260120785Abstract: A shift register circuit, including: a plurality of clock signal lines each supplying a clock pulse respectively; a plurality of cascade-connected register circuits including a top register circuit, and main register circuits providing between the top register circuit and the bottom register circuit; and a forward scan signal line supplying a forward scan signal to the plurality of cascade-connected register circuits.Type: ApplicationFiled: December 23, 2025Publication date: April 30, 2026Inventors: Takahiro OCHIAI, Mitsuru GOTO, Hiroko SEHATA, Hiroyuki HIGASHIJIMA
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Patent number: 12525308Abstract: A shift register circuit, including: a plurality of clock signal lines each supplying a plurality of clock pulses respectively; phases of the plurality of clock pulses are different from each other, and a plurality of cascade-connected register circuits including a top register circuit, a bottom register circuit, and main register circuits are provided between the top register circuit and the bottom register circuit. Each of the plurality of cascade-connected register circuits includes a set terminal, a reset terminal, a first node, a second node, a second node reset terminal, an output part, a second output part, a first node set part, a second node set part, a first node control part, and a second node control part.Type: GrantFiled: July 9, 2024Date of Patent: January 13, 2026Assignees: Magnolia Purple CorporationInventors: Takahiro Ochiai, Mitsuru Goto, Hiroko Sehata, Hiroyuki Higashijima
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Publication number: 20240363182Abstract: A shift register circuit, including: a plurality of clock signal lines each supplying a clock pulse respectively; a plurality of cascade-connected register circuits including a top register circuit, and main register circuits providing between the top register circuit and the bottom register circuit; and a forward scan signal line supplying a forward scan signal to the plurality of cascade-connected register circuits.Type: ApplicationFiled: July 9, 2024Publication date: October 31, 2024Inventors: Takahiro OCHIAI, Mitsuru GOTO, Hiroko SEHATA, Hiroyuki HIGASHIJIMA
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Patent number: 12057181Abstract: A shift register circuit, including: a plurality of clock signal lines each supplying a clock pulse respectively; a plurality of cascade-connected register circuits including a top register circuit, and main register circuits providing between the top register circuit and the bottom register circuit; and a forward scan signal line supplying a forward scan signal to the plurality of cascade-connected register circuits.Type: GrantFiled: December 5, 2022Date of Patent: August 6, 2024Assignees: Japan Display Inc.Inventors: Takahiro Ochiai, Mitsuru Goto, Hiroko Sehata, Hiroyuki Higashijima
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Patent number: 12007636Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.Type: GrantFiled: October 7, 2022Date of Patent: June 11, 2024Assignees: Japan Display Inc., Pansonic Liquid Crystal Display Co., Ltd.Inventors: Hideo Tanabe, Masaru Takabatake, Toshiki Kaneko, Atsushi Hasegawa, Hiroko Sehata
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Publication number: 20230104638Abstract: A display device including a bidirectional shift register circuit, including: a plurality of cascade-connected register circuits; various circuits for setting various nodes to various voltage levels responsive to various signals input to various terminals; and an output circuit which outputs the clock pulse as an output pulse when the voltage of the first node is high level, wherein, at the forward shift operation, the bottom dummy register circuit is not input the reset signal and the first node of the bottom dummy register circuit is reset if the initial reset circuit of the bottom dummy register circuit receives the backward trigger signal, and wherein, at the backward shift operation, the top dummy register circuit is not input the reset signal and the first node of the top dummy register circuit is reset if the initial reset circuit of the top dummy register circuit receives the forward trigger signal.Type: ApplicationFiled: December 5, 2022Publication date: April 6, 2023Inventors: Takahiro OCHIAI, Mitsuru GOTO, Hiroko SEHATA, Hiroyuki HIGASHIJIMA
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Publication number: 20230036779Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.Type: ApplicationFiled: October 7, 2022Publication date: February 2, 2023Inventors: Hideo TANABE, Masaru TAKABATAKE, Toshiki KANEKO, Atsushi HASEGAWA, Hiroko SEHATA
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Patent number: 11536999Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.Type: GrantFiled: March 1, 2021Date of Patent: December 27, 2022Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hideo Tanabe, Masaru Takabatake, Toshiki Kaneko, Atsushi Hasegawa, Hiroko Sehata
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Patent number: 11532371Abstract: A display device including a bidirectional shift register circuit, including: a plurality of cascade-connected register circuits; various circuits for setting various nodes to various voltage levels responsive to various signals input to various terminals; and an output circuit which outputs the clock pulse as an output pulse when the voltage of the first node is high level, wherein, at the forward shift operation, the bottom dummy register circuit is not input the reset signal and the first node of the bottom dummy register circuit is reset if the initial reset circuit of the bottom dummy register circuit receives the backward trigger signal, and wherein, at the backward shift operation, the top dummy register circuit is not input the reset signal and the first node of the top dummy register circuit is reset if the initial reset circuit of the top dummy register circuit receives the forward trigger signal.Type: GrantFiled: August 5, 2021Date of Patent: December 20, 2022Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takahiro Ochiai, Mitsuru Goto, Hiroko Sehata, Hiroyuki Higashijima
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Publication number: 20210366564Abstract: A display device including a bidirectional shift register circuit, including: a plurality of cascade-connected register circuits; various circuits for setting various nodes to various voltage levels responsive to various signals input to various terminals; and an output circuit which outputs the clock pulse as an output pulse when the voltage of the first node is high level, wherein, at the forward shift operation, the bottom dummy register circuit is not input the reset signal and the first node of the bottom dummy register circuit is reset if the initial reset circuit of the bottom dummy register circuit receives the backward trigger signal, and wherein, at the backward shift operation, the top dummy register circuit is not input the reset signal and the first node of the top dummy register circuit is reset if the initial reset circuit of the top dummy register circuit receives the forward trigger signal.Type: ApplicationFiled: August 5, 2021Publication date: November 25, 2021Inventors: Takahiro OCHIAI, Mitsuru GOTO, Hiroko SEHATA, Hiroyuki HIGASHIJIMA
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Patent number: 11114177Abstract: A display device including a bidirectional shift register circuit, including: a plurality of cascade-connected register circuits; various circuits for setting various nodes to various voltage levels responsive to various signals input to various terminals; and an output circuit which outputs the clock pulse as an output pulse when the voltage of the first node is high level, wherein, at the forward shift operation, the bottom dummy register circuit is not input the reset signal and the first node of the bottom dummy register circuit is reset if the initial reset circuit of the bottom dummy register circuit receives the backward trigger signal, and wherein, at the backward shift operation, the top dummy register circuit is not input the reset signal and the first node of the top dummy register circuit is reset if the initial reset circuit of the top dummy register circuit receives the forward trigger signal.Type: GrantFiled: June 19, 2020Date of Patent: September 7, 2021Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takahiro Ochiai, Mitsuru Goto, Hiroko Sehata, Hiroyuki Higashijima
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Publication number: 20210181569Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.Type: ApplicationFiled: March 1, 2021Publication date: June 17, 2021Inventors: Hideo TANABE, Masaru TAKABATAKE, Toshiki KANEKO, Atsushi HASEGAWA, Hiroko SEHATA
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Patent number: 10962815Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.Type: GrantFiled: January 6, 2020Date of Patent: March 30, 2021Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hideo Tanabe, Masaru Takabatake, Toshiki Kaneko, Atsushi Hasegawa, Hiroko Sehata
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Publication number: 20200321068Abstract: A display device including a bidirectional shift register circuit, including: a plurality of cascade-connected register circuits; various circuits for setting various nodes to various voltage levels responsive to various signals input to various terminals; and an output circuit which outputs the clock pulse as an output pulse when the voltage of the first node is high level, wherein, at the forward shift operation, the bottom dummy register circuit is not input the reset signal and the first node of the bottom dummy register circuit is reset if the initial reset circuit of the bottom dummy register circuit receives the backward trigger signal, and wherein, at the backward shift operation, the top dummy register circuit is not input the reset signal and the first node of the top dummy register circuit is reset if the initial reset circuit of the top dummy register circuit receives the forward trigger signal.Type: ApplicationFiled: June 19, 2020Publication date: October 8, 2020Inventors: Takahiro OCHIAI, Mitsuru GOTO, Hiroko SEHATA, Hiroyuki HIGASHIJIMA
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Patent number: 10726933Abstract: A plurality of cascade-connected register circuits which comprises a bidirectional shift register include a top register circuit, a bottom register circuit, and main register circuits. The register circuit has an output circuit which outputs one of four-phase clock pulses when a voltage of a first node is an active level; a second output circuit which outputs a non-active level when a voltage of a second node is the active level; a second node reset circuit which sets the second node to the non-active level when a voltage of a second node reset terminal is the active level. The forward scan signal sets the voltage of the first node of the top register circuit to the active level, and the forward scan signal sets the voltage of the second node reset terminal of the bottom register circuit to the active level.Type: GrantFiled: January 3, 2019Date of Patent: July 28, 2020Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takahiro Ochiai, Mitsuru Goto, Hiroko Sehata, Hiroyuki Higashijima
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Publication number: 20200150484Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.Type: ApplicationFiled: January 6, 2020Publication date: May 14, 2020Inventors: Hideo TANABE, Masaru TAKABATAKE, Toshiki KANEKO, Atsushi HASEGAWA, Hiroko SEHATA
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Patent number: 10564459Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.Type: GrantFiled: October 16, 2018Date of Patent: February 18, 2020Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hideo Tanabe, Masaru Takabatake, Toshiki Kaneko, Atsushi Hasegawa, Hiroko Sehata
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Publication number: 20190156905Abstract: A display device including a bidirectional shift register circuit, including: a plurality of cascade-connected register circuits; various circuits for setting various nodes to various voltage levels responsive to various signals input to various terminals; and an output circuit which outputs the clock pulse as an output pulse when the voltage of the first node is high level, wherein, at the forward shift operation, the bottom dummy register circuit is not input the reset signal and the first node of the bottom dummy register circuit is reset if the initial reset circuit of the bottom dummy register circuit receives the backward trigger signal, and wherein, at the backward shift operation, the top dummy register circuit is not input the reset signal and the first node of the top dummy register circuit is reset if the initial reset circuit of the top dummy register circuit receives the forward trigger signal.Type: ApplicationFiled: January 3, 2019Publication date: May 23, 2019Inventors: Takahiro OCHIAI, Mitsuru GOTO, Hiroko SEHATA, Hiroyuki HIGASHIJIMA
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Patent number: 10210945Abstract: A display device including a bidirectional shift register circuit, including: a plurality of cascade-connected register circuits; various circuits for setting various nodes to various voltage levels responsive to various signals input to various terminals; and an output circuit which outputs the clock pulse as an output pulse when the voltage of the first node is high level, wherein, at the forward shift operation, the bottom dummy register circuit is not input the reset signal and the first node of the bottom dummy register circuit is reset if the initial reset circuit of the bottom dummy register circuit receives the backward trigger signal, and wherein, at the backward shift operation, the top dummy register circuit is not input the reset signal and the first node of the top dummy register circuit is reset if the initial reset circuit of the top dummy register circuit receives the forward trigger signal.Type: GrantFiled: December 20, 2017Date of Patent: February 19, 2019Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takahiro Ochiai, Mitsuru Goto, Hiroko Sehata, Hiroyuki Higashijima
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Publication number: 20190049775Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.Type: ApplicationFiled: October 16, 2018Publication date: February 14, 2019Inventors: Hideo TANABE, Masaru TAKABATAKE, Toshiki KANEKO, Atsushi HASEGAWA, Hiroko SEHATA