Patents by Inventor Takeyuki Tsuruma
Takeyuki Tsuruma 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: 20230335068Abstract: Provided is a method for controlling a display device that is driven by using PWM signals, the method comprising: obtaining, by a controller, a type of display contents which are displayed on the display device; and controlling, by the controller, a duty of the PWM signals for driving the display device according to the type of the display contents, wherein the duty of the PWM signals is set to a first value if the type of the display contents is a video, and the duty of the PWM signals is set to a second value larger than the first value if the type of the display contents is a static-image.Type: ApplicationFiled: June 26, 2023Publication date: October 19, 2023Inventors: Takeyuki TSURUMA, Teppei ISOBE, Masafumi MATSUI
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Patent number: 10527891Abstract: 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 first line, a second line, a switching element, a common electrode, an insulating film disposed on the common electrode, a pixel electrode connected with the switching element and opposed to the common electrode with the insulating film interposed therebetween, and a first alignment film covering the pixel electrode. The second substrate includes a second alignment film. And the pixel electrode includes one main pixel electrode extending in a belt shape in a pixel area defined by the first line and the second line.Type: GrantFiled: December 29, 2017Date of Patent: January 7, 2020Assignee: Japan Display Inc.Inventors: Seiji Uejima, Hidemasa Yamaguchi, Yoshitaka Ozeki, Takeyuki Tsuruma, Kenta Seki, Toshiaki Fukushima
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Patent number: 10520779Abstract: In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.Type: GrantFiled: October 5, 2018Date of Patent: December 31, 2019Assignee: Japan Display Inc.Inventors: Takeyuki Tsuruma, Hidemasa Yamaguchi
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Patent number: 10394369Abstract: According to one embodiment, a display device includes a display area with pixels, and a detection electrode which includes first conductive lines overlapping the display area. Each of the pixels includes a first subpixel, a second subpixel adjacent to the first subpixel in a first direction, a third subpixel adjacent to the first subpixel in a second direction, and a fourth subpixel adjacent to the third subpixel in the first direction and to the second subpixel in the second direction. The pixels are arranged in the first direction with a first pitch, and the first conductive lines are arranged in the first direction with a second pitch which falls within a range of 2.2 times the first pitch or more and 3.2 times the first pitch or less.Type: GrantFiled: October 13, 2016Date of Patent: August 27, 2019Assignee: Japan Display Inc.Inventors: Takeyuki Tsuruma, Masaru Uchiyama, Michiaki Sakamoto, Koji Ishizaki
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Publication number: 20190041706Abstract: In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.Type: ApplicationFiled: October 5, 2018Publication date: February 7, 2019Inventors: Takeyuki Tsuruma, Hidemasa Yamaguchi
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Patent number: 10120245Abstract: In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.Type: GrantFiled: November 11, 2016Date of Patent: November 6, 2018Assignee: Japan Display Inc.Inventors: Takeyuki Tsuruma, Hidemasa Yamaguchi
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Patent number: 10054829Abstract: According to one embodiment, a liquid crystal display device includes a first scanning line, a third scanning line, a second scanning line, a first linear electrode, a second linear electrode and a third linear electrode. The first linear electrode is located between the first scanning line and the second scanning line, and extends in a third direction. The second linear electrode is located between the first scanning line and the second scanning line, and extends in a fourth direction. The third linear electrode is located between the second scanning line and the third scanning line, and comprises a portion extending in the fourth direction. The second linear electrode is electrically connected to the third linear electrode.Type: GrantFiled: January 2, 2018Date of Patent: August 21, 2018Assignee: Japan Display Inc.Inventors: Takeyuki Tsuruma, Masakatsu Kitani, Yoshihide Ohue
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Patent number: 9978321Abstract: According to one embodiment, a display device includes signal lines, scanning lines, a first pixel, a second pixel and a third pixel. The first pixel including a first subpixel which displays a first color, a second subpixel which displays white, and a third subpixel which displays a second color. The second pixel including a fourth subpixel which displays a third color, a fifth subpixel which displays white, and a sixth subpixel which displays the first color. The third pixel including a seventh subpixel which displays the second color, an eighth subpixel which displays white, and a ninth subpixel which displays the third color.Type: GrantFiled: July 28, 2016Date of Patent: May 22, 2018Assignee: Japan Display Inc.Inventors: Takeyuki Tsuruma, Akira Sakaigawa, Masaaki Kabe, Kojiro Ikeda
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Publication number: 20180120654Abstract: According to one embodiment, a liquid crystal display device includes a first scanning line, a third scanning line, a second scanning line, a first linear electrode, a second linear electrode and a third linear electrode. The first linear electrode is located between the first scanning line and the second scanning line, and extends in a third direction. The second linear electrode is located between the first scanning line and the second scanning line, and extends in a fourth direction. The third linear electrode is located between the second scanning line and the third scanning line, and comprises a portion extending in the fourth direction. The second linear electrode is electrically connected to the third linear electrode.Type: ApplicationFiled: January 2, 2018Publication date: May 3, 2018Applicant: Japan Display Inc.Inventors: Takeyuki TSURUMA, Masakatsu KITANI, Yoshihide OHUE
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Publication number: 20180120653Abstract: 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 first line, a second line, a switching element, a common electrode, an insulating film disposed on the common electrode, a pixel electrode connected with the switching element and opposed to the common electrode with the insulating film interposed therebetween, and a first alignment film covering the pixel electrode. The second substrate includes a second alignment film. And the pixel electrode includes one main pixel electrode extending in a belt shape in a pixel area defined by the first line and the second line.Type: ApplicationFiled: December 29, 2017Publication date: May 3, 2018Applicant: Japan Display Inc.Inventors: Seiji Uejima, Hidemasa Yamaguchi, Yoshitaka Ozeki, Takeyuki Tsuruma, Kenta Seki, Toshiaki Fukushima
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Patent number: 9941412Abstract: According to one embodiment, a display device includes a first scanning line, a signal line, a second pixel electrode, a first pixel electrode, a second thin-film transistor, a first line and a second line. The first line is connected to the second pixel electrode, and extends through a region facing the first pixel electrode to the first scanning line side. The first line and a second semiconductor layer of the second thin-film transistor are provided on a first insulating film and are formed of a same material. The second line connects the first line and a fourth electrode of the second thin-film transistor.Type: GrantFiled: March 31, 2017Date of Patent: April 10, 2018Assignee: Japan Display Inc.Inventors: Takeyuki Tsuruma, Yoshihide Ohue, Masakatsu Kitani
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Patent number: 9897871Abstract: According to one embodiment, a liquid crystal display device includes a first scanning line, a third scanning line, a second scanning line, a first linear electrode, a second linear electrode and a third linear electrode. The first linear electrode is located between the first scanning line and the second scanning line, and extends in a third direction. The second linear electrode is located between the first scanning line and the second scanning line, and extends in a fourth direction. The third linear electrode is located between the second scanning line and the third scanning line, and comprises a portion extending in the fourth direction. The second linear electrode is electrically connected to the third linear electrode.Type: GrantFiled: March 31, 2017Date of Patent: February 20, 2018Assignee: Japan Display Inc.Inventors: Takeyuki Tsuruma, Masakatsu Kitani, Yoshihide Ohue
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Patent number: 9891479Abstract: 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 first line, a second line, a switching element, a common electrode, an insulating film disposed on the common electrode, a pixel electrode connected with the switching element and opposed to the common electrode with the insulating film interposed therebetween, and a first alignment film covering the pixel electrode. The second substrate includes a second alignment film. And the pixel electrode includes one main pixel electrode extending in a belt shape in a pixel area defined by the first line and the second line.Type: GrantFiled: January 22, 2015Date of Patent: February 13, 2018Assignee: Japan Display Inc.Inventors: Seiji Uejima, Hidemasa Yamaguchi, Yoshitaka Ozeki, Takeyuki Tsuruma, Kenta Seki, Toshiaki Fukushima
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Patent number: 9804448Abstract: An IPS LCD that not only increases the screen luminance but also prevents the occurrence of image blurs by reducing the area of disclination and preventing the liquid crystal molecules from rising in a direction normal to the TFT substrate. A pixel electrode is disposed in the pixel surrounded by two gate lines and two data lines. A planar common electrode is located below the pixel electrode with an inter-layer insulating film provided therebetween. The pixel electrode includes slits each being open at the edge on one side and has the shape of a comb. Liquid crystals with negative dielectric anisotropy are used as liquid crystal. The above structure increases the transmissive area of the pixel up to the open edges of the slits and also prevents the liquid crystal molecules from rising in a direction normal to the TFT substrate, thereby preventing the occurrence of blurs.Type: GrantFiled: January 14, 2015Date of Patent: October 31, 2017Assignee: Japan Display Inc.Inventors: Takeyuki Tsuruma, Hidemasa Yamaguchi
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Publication number: 20170285379Abstract: According to one embodiment, a display device includes a first scanning line, a signal line, a second pixel electrode, a first pixel electrode, a second thin-film transistor, a first line and a second line. The first line is connected to the second pixel electrode, and extends through a region facing the first pixel electrode to the first scanning line side. The first line and a second semiconductor layer of the second thin-film transistor are provided on a first insulating film and are formed of a same material. The second line connects the first line and a fourth electrode of the second thin-film transistor.Type: ApplicationFiled: March 31, 2017Publication date: October 5, 2017Applicant: Japan Display Inc.Inventors: Takeyuki TSURUMA, Yoshihide OHUE, Masakatsu KITANI
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Publication number: 20170285421Abstract: According to one embodiment, a liquid crystal display device includes a first scanning line, a third scanning line, a second scanning line, a first linear electrode, a second linear electrode and a third linear electrode. The first linear electrode is located between the first scanning line and the second scanning line, and extends in a third direction. The second linear electrode is located between the first scanning line and the second scanning line, and extends in a fourth direction. The third linear electrode is located between the second scanning line and the third scanning line, and comprises a portion extending in the fourth direction. The second linear electrode is electrically connected to the third linear electrode.Type: ApplicationFiled: March 31, 2017Publication date: October 5, 2017Applicant: Japan Display Inc.Inventors: Takeyuki TSURUMA, Masakatsu Kitani, Yoshihide Ohue
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Publication number: 20170177147Abstract: According to one embodiment, a display device comprises pixel electrodes, a drive electrode, a detection electrode, and a detection module. The pixel electrodes are provided for respective pixels arrayed in a display area. The drive electrode forms an electric field for image display with the pixel electrodes. The detection electrode is opposed to the drive electrode. And The detection module detects an object in proximity to the display area based on a signal obtained from the detection electrode. In the display device, the detection electrode includes conductive lines extending parallel to each other, and the conductive lines are arranged at randomized pitch.Type: ApplicationFiled: December 13, 2016Publication date: June 22, 2017Applicant: JAPAN DISPLAY INC.Inventors: MICHIAKI SAKAMOTO, KOJI ISHIZAKI, TAKEYUKI TSURUMA
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Publication number: 20170123282Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including a first electrode, and a second electrode, a second substrate, and a liquid crystal layer, the second electrode includes an edge, the edge includes a first portion, a second portion, and a middle part which is located between the first portion and the second portion and is bent, and liquid crystal molecules form a region, between the first portion and the second portion, in which the liquid crystal molecules are rotated in a same direction by an electric field produced between the first electrode and the second electrode.Type: ApplicationFiled: October 28, 2016Publication date: May 4, 2017Applicant: Japan Display Inc.Inventor: Takeyuki TSURUMA
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Publication number: 20170102817Abstract: According to one embodiment, a display device includes a display area with pixels, and a detection electrode which includes first conductive lines overlapping the display area. Each of the pixels includes a first subpixel, a second subpixel adjacent to the first subpixel in a first direction, a third subpixel adjacent to the first subpixel in a second direction, and a fourth subpixel adjacent to the third subpixel in the first direction and to the second subpixel in the second direction. The pixels are arranged in the first direction with a first pitch, and the first conductive lines are arranged in the first direction with a second pitch which falls within a range of 2.2 times the first pitch or more and 3.2 times the first pitch or less.Type: ApplicationFiled: October 13, 2016Publication date: April 13, 2017Applicant: Japan Display Inc.Inventors: Takeyuki TSURUMA, Masaru UCHIYAMA, Michiaki SAKAMOTO, Koji ISHIZAKI
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Publication number: 20170059950Abstract: In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.Type: ApplicationFiled: November 11, 2016Publication date: March 2, 2017Inventors: Takeyuki TSURUMA, Hidemasa Yamaguchi