Patents Assigned to Panasonic Liquid Crystal Display Co., Ltd.
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Patent number: 11681184Abstract: Disclosed is a manufacturing method of a liquid crystal display device which is a manufacturing method of a liquid crystal display device including a liquid crystal alignment film to which an alignment regulating force is imparted by a photo-alignment treatment, including: a film forming step of forming a film containing a polymer whose main chain is cleaved by irradiation with light; a photo-alignment step of imparting an alignment regulating force to the film formed in the film forming step by irradiation of the film with light in an atmosphere of a temperature lower than 100° C.; and a removing step of removing a low-molecular weight component generated by cleaving the main chain of the polymer through the light irradiation after the light irradiation. Also disclosed is a liquid crystal display device manufactured by the manufacturing method.Type: GrantFiled: June 16, 2022Date of Patent: June 20, 2023Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Shoichi Uchino, Noboru Kunimatsu, Hidehiro Sonoda, Chikae Matsui, Yuko Matsumoto, Tomio Yaguchi, Toshiki Kaneko, Jun Tanaka
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Patent number: 11675235Abstract: A liquid crystal display device includes a TFT substrate having a display region where pixels each having a TFT and a pixel electrode are formed in a matrix, a counter substrate having a display region where color filters of three colors are formed in a matrix, the TFT substrate and the counter substrate being bonded together with a sealing material in a seal portion at a periphery, and liquid crystal sealed between the TFT substrate and the counter substrate by the seal material. In the display region, a first insulation film, a first alignment film, a first columnar spacer, an overcoat film, a first color filter among the color filters of three colors are stacked in this order between the TFT substrate and the counter substrate.Type: GrantFiled: July 26, 2022Date of Patent: June 13, 2023Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takashi Yamamoto, Tomoya Sugano, Takamitsu Kamada
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Patent number: 11650450Abstract: A color display device comprises an array of a plurality of sub-pixels including a red sub-pixel, a blue sub-pixel, a first green sub-pixel and a second green sub-pixel. The first green sub-pixel and the second green sub-pixel are smaller than that of the red sub-pixel or the blue sub-pixel. The two adjacent first green sub-pixels are arranged in a first direction, the two adjacent second green sub-pixels are arranged in the first direction. The blue sub-pixel is directly adjacent to the red sub-pixel in a second direction; the blue sub-pixel is directly adjacent to the two first green sub-pixels and the two second green sub-pixels.Type: GrantFiled: May 18, 2022Date of Patent: May 16, 2023Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Shoichi Hirota, Shinichi Komura, Yoshifumi Sekiguchi, Tsunenori Yamamoto, Masaya Adachi
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Patent number: 11635844Abstract: A display device includes a display panel, and an electrostatic capacitive type touch panel which is formed in an overlapping manner with the display panel. A plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes. A first signal line supplies signals to the X electrodes, a second signal line supplies signals to the Y electrodes, and the first signal line and the second signal line are formed on a flexible printed circuit board. A dummy electrode is formed adjacent to an electrode portion of each X electrode and electrode portion of each Y electrode, the dummy electrode does not overlap the X electrode and the Y electrode, and the dummy electrode does not electrically connect with the first and second signal lines.Type: GrantFiled: February 22, 2022Date of Patent: April 25, 2023Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Shinya Hashimoto
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Patent number: 11579479Abstract: A liquid crystal display device includes: first and second liquid crystal cells; first and second circuit boards connected to the first and second liquid crystal cells through first and second flexible wiring boards, respectively; a frame disposed on an opposite side to the first liquid crystal cell with respect to the second liquid crystal cell; and a holder that holds the first circuit board and the second circuit board. The first circuit board and the second circuit board are disposed on an opposite side to the second liquid crystal cell with respect to the frame. The second circuit board is located closer to the frame than the first circuit board, and the holder sandwiches the first circuit board, and stores the second circuit board between the frame and the holder.Type: GrantFiled: November 23, 2021Date of Patent: February 14, 2023Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.Inventor: Ryosuke Yabuki
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Patent number: 11543581Abstract: A liquid crystal display device includes a LCD panel having a first polarizer, a first substrate, a second substrate and a second polarizer are sequentially provided from a front surface side, a frame which surrounds the LCD panel and has a first opening having first to fourth sides, a planar light source disposed on the rear surface side of the LCD panel in the first opening, a plurality of optical sheet groups which are disposed between the planar light source and the LCD panel, and an adhesive layer which has a second opening formed along the first to fourth sides of the frame. A front surface side of the adhesive layer is adhered to the LCD panel along at least the first side, and a rear surface side of the adhesive layer is adhered to the plurality of optical sheet groups and the frame along at least the first side.Type: GrantFiled: March 28, 2022Date of Patent: January 3, 2023Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Eiji Oohira
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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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Patent number: 11513396Abstract: An alignment film is given a 2-layer structure comprising a photoalignment film that is photoalignable and a low-resistivity alignment film whose resistivity is smaller than that of the photoalignment film. The photoalignment film is formed by a polyimide whose precursor is polyamide acid alkyl ester, the number molecular weight of the photoalignment film is large, and the stability of alignment of the photoalignment film by photoalignment is excellent. The low-resistivity alignment film is formed by a polyimide whose precursor is polyamide acid, the number molecular weight of the low-resistivity alignment film is small, and the resistivity of the low-resistivity alignment film is small. The 2-layer structure alignment film can be maintaining an excellent photoalignment characteristic, so DC afterimages can be controlled.Type: GrantFiled: October 23, 2020Date of Patent: November 29, 2022Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Chikae Matsui, Noboru Kunimatsu, Hidehiro Sonoda
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Patent number: 11493792Abstract: An electronic device includes a liquid crystal display device having a first substrate, a second substrate bonded to the first substrate, with liquid crystal material held between the first substrate and the second substrate, and an upper polarizing plate affixed to the second substrate. A protective member is disposed over the upper polarizing plate, and an adhesive member is disposed between the protective member and the upper polarizing plate without an air layer between the protective member and the upper polarizing plate. The protective member is configured as a protective cover of the electronic device.Type: GrantFiled: January 13, 2022Date of Patent: November 8, 2022Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Koichi Fukuda
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Patent number: 11480831Abstract: A liquid crystal display device includes a TFT substrate and a counter substrate and a liquid crystal layer sandwiched therebetween. A scanning line, a video signal line, a thin film transistor connected to the scanning line and the video signal line, a pixel electrode connected to the thin film transistor, and a counter electrode are formed on the TFT substrate, and a columnar spacer formed on the counter substrate. The pixel and counter electrodes are transparent, and the liquid crystal layer is controlled by an electric field generated between the pixel and counter electrodes. The counter electrode contacts with a metal line having a first part which is extended in parallel with the scanning line and a second part which is extended in parallel with the video signal line, a width of the first part of the metal line being narrower than a width of the scanning line.Type: GrantFiled: March 22, 2021Date of Patent: October 25, 2022Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co.. Ltd.Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
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Patent number: 11448911Abstract: A method of setting a common electrode voltage of a liquid crystal display panel in a liquid crystal module is provided. The liquid crystal module includes the liquid crystal display panel including an alignment film, and a backlight disposed behind the liquid crystal display panel. The method of setting a common electrode voltage of a liquid crystal display panel includes: eliminating an electric charge of the alignment film by turning on the backlight without driving the liquid crystal display panel to emit light of the backlight onto the liquid crystal display panel; and setting the common electrode voltage of the liquid crystal display panel by adjusting the common electrode voltage, after the eliminating of the electric charge.Type: GrantFiled: July 13, 2021Date of Patent: September 20, 2022Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.Inventors: Keisuke Izawa, Makoto Arita, Toshitaka Uchikoba
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Patent number: 11448923Abstract: A liquid crystal display panel to be used in a vertical orientation includes: a first substrate; a second substrate located opposite to the first substrate; and a liquid crystal layer disposed between the first substrate and the second substrate. When a position of a top end of the liquid crystal layer is defined as a first position and a position of a bottom end of the liquid crystal layer is defined as a second position when the liquid crystal display panel is placed in the vertical orientation, a distance between the first substrate and the second substrate when the liquid crystal panel is in a horizontal orientation gradually decreases from the first position to the second position.Type: GrantFiled: July 13, 2021Date of Patent: September 20, 2022Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.Inventors: Keisuke Izawa, Makoto Arita, Toshitaka Uchikoba
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Patent number: 11428995Abstract: A liquid crystal display device includes a TFT substrate having a display region where pixels each having a TFT and a pixel electrode are formed in a matrix, a counter substrate having a display region where color filters of three colors are formed in a matrix, the TFT substrate and the counter substrate being bonded together with a sealing material in a seal portion at a periphery, and liquid crystal sealed between the TFT substrate and the counter substrate by the seal material. In the display region, a first insulation film, a first alignment film, a first columnar spacer, an overcoat film, a first color filter among the color filters of three colors are stacked in this order between the TFT substrate and the counter substrate.Type: GrantFiled: June 7, 2021Date of Patent: August 30, 2022Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takashi Yamamoto, Tomoya Sugano, Takamitsu Kamada
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Patent number: 11422422Abstract: A liquid crystal display panel, comprising: a plurality of source lines extending in a first direction, and including a first source line and a second source line; a plurality of gate lines extending in a second direction different from the first direction, and crossing the plurality of source lines; and a plurality of pixel units defined by the plurality of source lines and the plurality of gate lines, in which a plurality of transistors and a plurality of pixel electrode are disposed, respectively; the first source line and the second source line are respectively connected to two adjacent rows of the pixel unit; wherein the first source line comprises a first line segment disposed on a first wiring layer; the second source line comprises a second line segment, and the second line segment is disposed on a second wiring layer different from the first wiring layer.Type: GrantFiled: February 20, 2020Date of Patent: August 23, 2022Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.Inventor: Teruhisa Nakagawa
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Patent number: 11422399Abstract: A portable device and method of manufacturing a display device includes a display panel having a glass substrate and a polarizer adhered to the glass substrate, a touch panel which is made of resin material and adhered to the polarizer of the display panel by a first adhesive material, and a front window which is made of glass and adhered to the touch panel by a second adhesive material. One of the first adhesive material and the second adhesive material is an adhesive sheet, and an other of the first adhesive material and the second adhesive material is an ultraviolet-curing adhesive material.Type: GrantFiled: September 7, 2021Date of Patent: August 23, 2022Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Eiji Oohira
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Patent number: 11402707Abstract: A liquid crystal display device includes: a first liquid crystal cell; a second liquid crystal cell disposed in a backlight side; and a first optical sheet and a second optical sheet both having an identical layer structure. The first optical sheet is disposed on a front surface side of the first liquid crystal cell and the second optical sheet is disposed on a back surface side of the second liquid crystal cell, or vice versa.Type: GrantFiled: May 2, 2019Date of Patent: August 2, 2022Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.Inventors: Yoichi Yasui, Takao Imaoku, Katsuhiro Kikuchi, Kazuhiko Tsuda
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Patent number: 11398198Abstract: A display device includes a first display panel disposed closer to an observer and a second display panel disposed farther from the observer than the first display panel. An image display region of the second display panel is larger than an image display region of the first display panel.Type: GrantFiled: February 8, 2021Date of Patent: July 26, 2022Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNERS INC.Inventors: Toshikazu Koudo, Tetsuo Fukami
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Patent number: 11398503Abstract: A display device, comprising: a first pixel row including a first pixel electrode and a second pixel electrode that are arranged in a first direction; a second pixel row; a third pixel row; a first source line and a second source line that extend in a second direction between the first pixel electrode and the second pixel electrode; a first gate line that extends in the first direction between the first pixel row and the second pixel row; a second gate line that extends in the first direction between the second pixel row and the third pixel row; a first end connection wiring that connects the first gate line to the second gate line at an end portion of the second pixel row; and one or more first cross connection wirings that transverse the second pixel row and connect the first gate line to the second gate line.Type: GrantFiled: January 28, 2020Date of Patent: July 26, 2022Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.Inventor: Teruhisa Nakagawa
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Patent number: 11391993Abstract: Disclosed is a manufacturing method of a liquid crystal display device which is a manufacturing method of a liquid crystal display device including a liquid crystal alignment film to which an alignment regulating force is imparted by a photo-alignment treatment, including: a film forming step of forming a film containing a polymer whose main chain is cleaved by irradiation with light; a photo-alignment step of imparting an alignment regulating force to the film formed in the film forming step by irradiation of the film with light in an atmosphere of a temperature lower than 100° C.; and a removing step of removing a low-molecular weight component generated by cleaving the main chain of the polymer through the light irradiation after the light irradiation. Also disclosed is a liquid crystal display device manufactured by the manufacturing method.Type: GrantFiled: March 24, 2020Date of Patent: July 19, 2022Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Shoichi Uchino, Noboru Kunimatsu, Hidehiro Sonoda, Chikae Matsui, Yuko Matsumoto, Tomio Yaguchi, Toshiki Kaneko, Jun Tanaka