Patents by Inventor Yasunori Yoshida
Yasunori Yoshida 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: 20230252948Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (1/2) Lmax2<Lmax1<(9/10) Lmax2 is satisfied in the one frame period, is provided.Type: ApplicationFiled: April 12, 2023Publication date: August 10, 2023Inventors: Yasunori YOSHIDA, Hajime KIMURA
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Patent number: 11657770Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½) Lmax2<Lmax1<( 9/10) Lmax2 is satisfied in the one frame period, is provided.Type: GrantFiled: July 9, 2020Date of Patent: May 23, 2023Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yasunori Yoshida, Hajime Kimura
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Patent number: 11600236Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½) Lmax2<Lmax1<( 9/10) Lmax2 is satisfied in the one frame period, is provided.Type: GrantFiled: February 17, 2022Date of Patent: March 7, 2023Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yasunori Yoshida, Hajime Kimura
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Publication number: 20220172685Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½) Lmax2<Lmax1<( 9/10) Lmax2 is satisfied in the one frame period, is provided.Type: ApplicationFiled: February 17, 2022Publication date: June 2, 2022Inventors: Yasunori YOSHIDA, Hajime KIMURA
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Patent number: 11341924Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½) Lmax2<Lmax1<( 9/10) Lmax2 is satisfied in the one frame period, is provided.Type: GrantFiled: July 9, 2020Date of Patent: May 24, 2022Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yasunori Yoshida, Hajime Kimura
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Publication number: 20200342820Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½) Lmax2<Lmax1<( 9/10) Lmax2 is satisfied in the one frame period, is provided.Type: ApplicationFiled: July 9, 2020Publication date: October 29, 2020Inventors: Yasunori YOSHIDA, Hajime KIMURA
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Patent number: 10714024Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½)Lmax2<Lmax1<( 9/10)Lmax2 is satisfied in the one frame period, is provided.Type: GrantFiled: June 19, 2018Date of Patent: July 14, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yasunori Yoshida, Hajime Kimura
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Publication number: 20190355303Abstract: In a display element such as an organic EL element, deterioration progresses due to light emission, and emission luminance is lowered even if the same voltage is applied to the display element. Therefore, use over time causes variations in luminance of each pixel, thereby a so-called “image burn-in” phenomenon occurs. Given this factor, the invention provides a display device which can reduce the difference in deterioration of a display element in each pixel and suppress variations in light emission of a display element in a pixel. It is prevented that only a specific pixel has a long accumulated lighting time. For that purpose, a gray scale of a display pattern is changed to prevent the difference in deterioration of display element in pixels from increasing. Alternatively, a specific display pattern is prevented from being fixedly displayed in a specific region.Type: ApplicationFiled: June 7, 2019Publication date: November 21, 2019Inventors: Shunpei YAMAZAKI, Hajime KIMURA, Atsushi UMEZAKI, Yasunori YOSHIDA, Hideaki SHISHIDO, Takuya KIMISHIMA, Yasuyuki ARAI
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Patent number: 10319298Abstract: In a display element such as an organic EL element, deterioration progresses due to light emission, and emission luminance is lowered even if the same voltage is applied to the display element. Therefore, use over time causes variations in luminance of each pixel, thereby a so-called “image burn-in” phenomenon occurs. Given this factor, the invention provides a display device which can reduce the difference in deterioration of a display element in each pixel and suppress variations in light emission of a display element in a pixel. It is prevented that only a specific pixel has a long accumulated lighting time. For that purpose, a gray scale of a display pattern is changed to prevent the difference in deterioration of display element in pixels from increasing. Alternatively, a specific display pattern is prevented from being fixedly displayed in a specific region.Type: GrantFiled: November 17, 2017Date of Patent: June 11, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Hajime Kimura, Atsushi Umezaki, Yasunori Yoshida, Hideaki Shishido, Takuya Kimishima, Yasuyuki Arai
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Publication number: 20180301097Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (1/2)Lmax2<Lmax1<(9/10)Lmax2 is satisfied in the one frame period, is provided.Type: ApplicationFiled: June 19, 2018Publication date: October 18, 2018Inventors: Yasunori YOSHIDA, Hajime KIMURA
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Publication number: 20180267373Abstract: In a display device including a backlight and a display panel, the area of the backlight is divided into a plurality of unit regions; the display panel includes pixels which are larger in number than the unit regions; a frame rate of image data input to the device is converted to perform display while part of the unit regions in which black is displayed is in a non-light emission state; and the driving frequency of the backlight is converted in accordance with the display.Type: ApplicationFiled: March 29, 2018Publication date: September 20, 2018Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventor: Yasunori Yoshida
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Patent number: 10013923Abstract: It is an object of the present invention to provide a display device in which problems such as an increase of power consumption and increase of a load of when light is emitted are reduced by using a method for realizing pseudo impulsive driving by inserting an dark image, and a driving method thereof. A display device which displays a gray scale by dividing one frame period into a plurality of subframe periods, where one frame period is divided into at least a first subframe period and a second subframe period; and when luminance in the first subframe period to display the maximum gray scale is Lmax1 and luminance in the second subframe period to display the maximum gray scale is Lmax2, (½) Lmax2<Lmax1<( 9/10) Lmax2 is satisfied in the one frame period, is provided.Type: GrantFiled: November 12, 2015Date of Patent: July 3, 2018Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yasunori Yoshida, Hajime Kimura
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Patent number: 9989089Abstract: A guide mechanism includes: a guide member having a first groove; a slide member having a second groove; and rolling bodies arranged in a guide groove comprising the first groove and the second groove. A stopper for preventing the rolling bodies from moving out of the guide groove is affixed to the second groove by welding. A method for manufacturing the guide mechanism includes a welding step in which the second groove and the stopper are welded by resistance welding while the stopper is pressed against the second groove.Type: GrantFiled: April 9, 2015Date of Patent: June 5, 2018Assignee: SMC CORPORATIONInventors: Yasunori Yoshida, Rikiya Ishikawa, Youichi Kawamura, Yoshihiro Toshimori, Motohiro Sato, Nariaki Suzuki, Toshio Sato
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Patent number: 9984640Abstract: To provide a semiconductor device which operates stably with few malfunctions due to noise, with low power consumption, and little variation in characteristics; a display device including the semiconductor device; and an electronic device including the display device. An output terminal is connected to a power supply line, thereby reducing variation in electric potential of the output terminal. In addition, a gate electrode potential which turns ON a transistor is maintained due to the capacitance of the transistor. Further, change in characteristics of the transistor is reduced by a signal line for reverse bias.Type: GrantFiled: July 14, 2016Date of Patent: May 29, 2018Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Yasunori Yoshida
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Patent number: 9960225Abstract: It is an object to improve performance of a power storage device, such as cycle characteristics. A power storage device includes a current collector and a crystalline semiconductor layer including a whisker, which is formed on and in close contact with the current collector. Separation of the crystalline semiconductor layer is suppressed by an increase of adhesion, whereby cycle characteristics in which a specific capacity of a tenth cycle number with respect to a first cycle number is greater than or equal to 90% is realized. In addition, cycle characteristics in which a specific capacity of a hundredth cycle number with respect to a first cycle number is greater than or equal to 70% is realized.Type: GrantFiled: June 21, 2011Date of Patent: May 1, 2018Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Kazutaka Kuriki, Michiko Konishi, Asami Tadokoro, Yasunori Yoshida, Kiyofumi Ogino, Toshihiko Takeuchi
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Publication number: 20180075806Abstract: In a display element such as an organic EL element, deterioration progresses due to light emission, and emission luminance is lowered even if the same voltage is applied to the display element. Therefore, use over time causes variations in luminance of each pixel, thereby a so-called “image burn-in” phenomenon occurs. Given this factor, the invention provides a display device which can reduce the difference in deterioration of a display element in each pixel and suppress variations in light emission of a display element in a pixel. It is prevented that only a specific pixel has a long accumulated lighting time. For that purpose, a gray scale of a display pattern is changed to prevent the difference in deterioration of display element in pixels from increasing. Alternatively, a specific display pattern is prevented from being fixedly displayed in a specific region.Type: ApplicationFiled: November 17, 2017Publication date: March 15, 2018Inventors: Shunpei YAMAZAKI, Hajime KIMURA, Atsushi UMEZAKI, Yasunori YOSHIDA, Hideaki SHISHIDO, Takuya KIMISHIMA, Yasuyuki ARAI
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Publication number: 20170365226Abstract: It is an object to provide a display device in which a problem of light leakage from a liquid crystal element in black display is reduced or overcome and the contrast is improved. It is another object to provide a pixel circuit having a function to control a lighting state of a backlight based on each pixel. These objects are achieved by turning off a light-emitting element in display of a black gray scale, and by providing a light-emitting element in each pixel and providing, in a pixel circuit, a function to individually control lighting and non-lighting of the light-emitting element depending on a gray scale to perform display. When a backlight is provided in each pixel, a light-emitting element that is a backlight is turned off when a black gray scale is displayed, whereby reduction in contrast due to light leakage from a liquid crystal element can be prevented.Type: ApplicationFiled: August 10, 2017Publication date: December 21, 2017Inventors: Hajime KIMURA, Yasunori YOSHIDA, Hideaki SHISHIDO, Atsushi UMEZAKI, Makoto YANAGISAWA, Shunpei YAMAZAKI
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Patent number: 9824631Abstract: In a display element such as an organic EL element, deterioration progresses due to light emission, and emission luminance is lowered even if the same voltage is applied to the display element. Therefore, use over time causes variations in luminance of each pixel, thereby a so-called “image burn-in” phenomenon occurs. Given this factor, the invention provides a display device which can reduce the difference in deterioration of a display element in each pixel and suppress variations in light emission of a display element in a pixel. It is prevented that only a specific pixel has a long accumulated lighting time. For that purpose, a gray scale of a display pattern is changed to prevent the difference in deterioration of display element in pixels from increasing. Alternatively, a specific display pattern is prevented from being fixedly displayed in a specific region.Type: GrantFiled: August 6, 2015Date of Patent: November 21, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Hajime Kimura, Atsushi Umezaki, Yasunori Yoshida, Hideaki Shishido, Takuya Kimishima, Yasuyuki Arai
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Patent number: 9734802Abstract: To provide an active matrix display device in which power consumption of a signal line driver circuit can be suppressed, so that power consumption of the entire memory can be suppressed. A plurality of memory circuits which can write data of a video signal input to a pixel in one line period and can hold the data are provided in a signal line driver circuit of a display device. Then, the data held in each memory circuit is input to a pixel of a corresponding line as a video signal. By providing two or more memory circuits in a driver circuit, pieces of data of video signals corresponding to two or more line periods can be concurrently held in the memory circuits.Type: GrantFiled: May 15, 2015Date of Patent: August 15, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Yasunori Yoshida
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Publication number: 20170058950Abstract: A guide mechanism (10) is provided with: a guide member (72) having a first groove (81); a slide member (74) having a second groove (82); and rolling bodies (76) arranged in a guide groove (98) comprising the first groove (81) and the second groove (82). A stopper (100) for preventing the rolling bodies (76) from moving out of the guide groove (98) is affixed to the second groove (82) by welding. A method for manufacturing the guide mechanism (10) includes a welding step in which the second groove (82) and the stopper (100) are welded by resistance welding while the stopper (100) is pressed against the second groove (82).Type: ApplicationFiled: April 9, 2015Publication date: March 2, 2017Applicant: SMC CORPORATIONInventors: Yasunori YOSHIDA, Rikiya ISHIKAWA, Youichi KAWAMURA, Yoshihiro TOSHIMORI, Motohiro SATO, Nariaki SUZUKI, Toshio SATO