Patents by Inventor Kazufumi Watabe
Kazufumi Watabe 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: 20170338437Abstract: The invention provides an organic EL display device that, even if bent, is not prone to plastic deformation and has improved moisture blocking characteristics. An organic EL display device includes: a glass substrate; an organic EL layer formed on an upper side of the glass substrate; and a support substrate glued on a lower side of the glass substrate via a first adhesive. Recessed portions or projecting portions are formed on the glass substrate at a side thereof facing the support substrate. The recessed portions or a space between each of the projecting portions is filled with the first adhesive.Type: ApplicationFiled: May 16, 2017Publication date: November 23, 2017Inventors: Kazufumi WATABE, Yoshinori ISHll
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Patent number: 9780307Abstract: A glass substrate that corresponds to a plurality of product regions and a first grid region that surrounds each of the plurality of product regions and is grid-like is prepared. A protective film that is harder than the glass substrate is formed in the first grid region. A resin layer is formed so as to cover the protective film and the glass substrate. A part of the resin layer is removed by blast processing in a second grid region that avoids the plurality of product regions, overlaps with the first grid region and surrounds each of the plurality of product regions. A circuit layer is formed on the resin layer. The glass substrate is cut along lines that pass through the second grid region where the part of the resin layer is removed. The glass substrate is peeled off from the resin layer.Type: GrantFiled: December 13, 2016Date of Patent: October 3, 2017Assignee: Japan Display Inc.Inventors: Kazufumi Watabe, Hiroshi Kawanago
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Publication number: 20170243933Abstract: A manufacturing method of a display device including a pixel region including a plurality of pixels each including a light emitting element and a terminal region provided outside the pixel region and including connection terminals; the method comprising: forming a recessed portion in a part of a top surface of each of the connection terminals; forming a first inorganic insulating layer, an organic insulating layer, and a second inorganic insulating layer sequentially in the pixel region and continuously in the terminal region; and etching the first inorganic insulating layer and the second inorganic insulating layer in an area where the first inorganic insulating layer and the second inorganic insulating layer are stacked directly, the area being on the top surface except the recessed portion.Type: ApplicationFiled: September 29, 2016Publication date: August 24, 2017Inventors: Takeshi KURIYAGAWA, Kazufumi WATABE, Toshihiro SATO
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Publication number: 20170229664Abstract: Simple and high-precision processing, and narrowing of the frame are to be facilitated at the time of preparing display panels by multiple formation. After bonding a first substrate layer in which a plurality of element substrates is formed on a support plate and a second substrate layer in which a plurality of counter substrates is formed on a support plate, these substrate layers are divided into a plurality of display panels. Ridge-like ribs of a covalently or ionically bonding inorganic material are formed along edges of the element substrate and the counter substrate. The dividing includes scribing the support plates along the ribs, and flexing and breaking the support plates.Type: ApplicationFiled: November 18, 2016Publication date: August 10, 2017Applicant: Japan Display Inc.Inventors: Kazufumi WATABE, Toshihiro SATO
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Publication number: 20170207245Abstract: According to one embodiment, a semiconductor device includes an insulating substrate, a first semiconductor layer formed of silicon and positioned above the insulating substrate, a second semiconductor layer formed of a metal oxide and positioned above the first semiconductor layer, a first insulating film formed of a silicon nitride and positioned between the first semiconductor layer and the second semiconductor layer, and a block layer positioned between the first semiconductor film and the second semiconductor layer, the block layer hydrogen diffusion of which is lower than that of the first insulating film.Type: ApplicationFiled: January 13, 2017Publication date: July 20, 2017Applicant: Japan Display Inc.Inventors: Akihiro HANADA, Hajime WATAKABE, Kazufumi WATABE
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Publication number: 20170179386Abstract: A glass substrate that corresponds to a plurality of product regions and a first grid region that surrounds each of the plurality of product regions and is grid-like is prepared. A protective film that is harder than the glass substrate is formed in the first grid region. A resin layer is formed so as to cover the protective film and the glass substrate. A part of the resin layer is removed by blast processing in a second grid region that avoids the plurality of product regions, overlaps with the first grid region and surrounds each of the plurality of product regions. A circuit layer is formed on the resin layer. The glass substrate is cut along lines that pass through the second grid region where the part of the resin layer is removed. The glass substrate is peeled off from the resin layer.Type: ApplicationFiled: December 13, 2016Publication date: June 22, 2017Applicant: Japan Display Inc.Inventors: Kazufumi WATABE, Hiroshi KAWANAGO
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Patent number: 9680127Abstract: In an organic EL display device, an improvement in the performance of a barrier film that blocks entry of a substance that causes degradation, such as moisture, into an organic electroluminescent element is achieved. The organic EL display device includes the barrier film, which is a stacked film including a barrier base material layer made of silicon oxide or silicon nitride and a base material coating layer in contact with an impregnated barrier base material layer. The barrier film blocks transmission of a substance that degrades the organic electroluminescent element. Nano-ink is applied on a surface of the barrier base material layer, and the barrier base material layer is impregnated with the nano-ink. The barrier base material layer subjected to the impregnation treatment serves as the impregnated barrier base material layer, while the nano-ink after impregnation serves as the base material coating layer.Type: GrantFiled: July 24, 2015Date of Patent: June 13, 2017Assignee: Japan Display Inc.Inventor: Kazufumi Watabe
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Publication number: 20170077401Abstract: A method of manufacturing a display device, including: a stacking step of stacking, on a glass substrate, a sacrificial resin layer, a metal layer, a transparent metal oxide layer, a base material resin layer, and a functional layer including at least one of a pixel circuit-constituting layer driving a plurality of pixels and a color filter layer, in this order; a radiating step of radiating a pulsed light of a xenon flash lamp to the metal layer through the glass substrate and the sacrificial resin layer; and a detaching step of reducing a force of adhesion between the sacrificial resin layer and the metal layer with the pulsed light radiated in the radiating step, and detaching the sacrificial resin layer from the metal layer.Type: ApplicationFiled: August 25, 2016Publication date: March 16, 2017Inventors: Hiroshi KAWANAGO, Kazufumi WATABE
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Publication number: 20170062761Abstract: A base body including a plurality of first regions and a second region having a shape surrounding each of the first regions is prepared. A resin layer is formed in the plurality of first regions while avoiding the second region. A buried layer having a moisture-proof property higher than the resin layer is formed in the second region. A functional layer including a self-emitting element layer emitting light whose luminance is controlled for each of a plurality of unit pixels constituting an image is formed on the resin layer and the buried layer. The buried layer and the functional layer are cut along a line passing through the second region, so as to separate the resin layer into a plurality of portions respectively corresponding to the plurality of first regions.Type: ApplicationFiled: August 22, 2016Publication date: March 2, 2017Inventors: Takeshi KURIYAGAWA, Kazufumi WATABE
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Publication number: 20170040569Abstract: First rib layers made of an inorganic material are formed in first frame regions of a first glass substrate. First resin layers are formed in first product regions after the first rib layers are formed. First functional layers which include light emitting element layers as a result of luminance of each of unit pixels forming an image being controlled and sealing layers covering the light emitting element layers are formed on the first rib layers and the first resin layers. The first rib layers and the first functional layers are cut along lines passing through the first frame regions while avoiding the first product regions in order to separate the first product regions from each other. In the step of cutting the first rib layers and the first functional layers, the first rib layers and the sealing layers are cut.Type: ApplicationFiled: August 5, 2016Publication date: February 9, 2017Inventors: Kazufumi WATABE, Hiroshi KAWANAGO, Manabu YAMASHITA, Hideaki ISHIGE
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Publication number: 20160276625Abstract: A structure including a first resin layer and a second resin layer sandwiching a self-light emitting element layer, a first stopper layer, a first resin sacrificial layer and a first glass substrate which are stacked on the first resin layer on the opposite side of the self-light emitting element layer, and a second glass substrate stacked on the second resin layer is prepared. The first glass substrate is peeled off from the first resin sacrificial layer by irradiating the first glass substrate with a laser beam. The first resin sacrificial layer is decomposed by a chemical reaction using a gas. The first stopper layer has a resistance to the chemical reaction, and the first resin sacrificial layer is removed while leaving the first stopper layer in a step of decomposing the first resin sacrificial layer.Type: ApplicationFiled: March 15, 2016Publication date: September 22, 2016Inventors: Kazufumi WATABE, Hiroshi KAWANAGO
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Publication number: 20160036003Abstract: In an organic EL display device, an improvement in the performance of a barrier film that blocks entry of a substance that causes degradation, such as moisture, into an organic electroluminescent element is achieved. The organic EL display device includes the barrier film, which is a stacked film including a barrier base material layer made of silicon oxide or silicon nitride and a base material coating layer in contact with an impregnated barrier base material layer. The barrier film blocks transmission of a substance that degrades the organic electroluminescent element. Nano-ink is applied on a surface of the barrier base material layer, and the barrier base material layer is impregnated with the nano-ink. The barrier base material layer subjected to the impregnation treatment serves as the impregnated barrier base material layer, while the nano-ink after impregnation serves as the base material coating layer.Type: ApplicationFiled: July 24, 2015Publication date: February 4, 2016Inventor: Kazufumi WATABE
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Patent number: 9250437Abstract: Provided is a display device, including: a light shielding film including a plurality of fixed apertures, each allowing passage of light; a lens arranged above the plurality of fixed apertures; a plurality of shutters, which are arranged between the light shielding film and the lens and correspond to the plurality of fixed apertures, respectively, for controlling passage and blocking of the light; and a drive portion for driving each of the plurality of shutters to move between a position above each of the plurality of fixed apertures and a position retracted from each of the plurality of fixed apertures. The plurality of fixed apertures each have an elongated shape including a long-side direction and a short-side direction. The lens has a light refractive power that is larger in the short-side direction than in the long-side direction.Type: GrantFiled: May 7, 2012Date of Patent: February 2, 2016Assignee: Pixtronix, Inc.Inventors: Takahiko Muneyoshi, Naohisa Ando, Takahide Kuranaga, Mitsuhide Miyamoto, Kazufumi Watabe
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Patent number: 9170360Abstract: A display device includes a side light type backlight for white color display by single color LEDs, an LED set is placed in a concave portion of a light guide plate, in which a first color LED is located in the center and a second or third color LED is located on the side of the first color LED. An incident slit with an arc shaped convex portion is formed facing the first color LED, and a saw tooth slit with a right-angled triangular concave portion is formed facing the second or third color LED. This allows directing the distribution axes of the lights from the second and third color LEDs to the center side, and adjusting orientation angles to allow effective mixing of the three color lights, in order to increase the white color area and effective display area.Type: GrantFiled: July 29, 2013Date of Patent: October 27, 2015Assignee: JAPAN DISPLAY INC.Inventors: Kazufumi Watabe, Masayuki Mifune
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Publication number: 20140029297Abstract: A display device includes a side light type backlight for white color display by single color LEDs, an LED set is placed in a concave portion of a light guide plate, in which a first color LED is located in the center and a second or third color LED is located on the side of the first color LED. An incident slit with an arc shaped convex portion is formed facing the first color LED, and a saw tooth slit with a right-angled triangular concave portion is formed facing the second or third color LED. This allows directing the distribution axes of the lights from the second and third color LEDs to the center side, and adjusting orientation angles to allow effective mixing of the three color lights, in order to increase the white color area and effective display area.Type: ApplicationFiled: July 29, 2013Publication date: January 30, 2014Applicant: Japan Display Inc.Inventors: Kazufumi WATABE, Masayuki MIFUNE
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Publication number: 20120307332Abstract: A display device includes an aperture substrate including a plurality of openings arranged in a matrix form and a plurality of shutter parts that are arranged between a first substrate and a second substrate correspondingly to the openings. The plurality of shutter parts move in a horizontal direction relative to the aperture substrate so as to control an amount of light emitted from the plurality of openings. Also, the display device includes a liquid holding wall configured to hold a liquid between the first substrate and the second substrate and is arranged to surround a display area including the plurality of shutter parts, and includes at least one bubble holding part configured to hold a bubble that is generated in the liquid and is guided to the at least one bubble holding part. The at least one bubble holding part is provided as a part of the liquid holding wall.Type: ApplicationFiled: May 30, 2012Publication date: December 6, 2012Inventors: Naohisa ANDO, Takahiko Muneyoshi, Kazufumi Watabe, Mitsuhide Miyamoto, Takahide Kuranaga
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Publication number: 20120300494Abstract: Light sources include a pair of first light sources located at both ends in an arrangement direction and a second light source located between the first light sources. Each of directions in which the first light sources face is set so as to cross a direction in which the second light source faces. Each of the first light sources has first light-emitting portions arranged along a circumferential edge and emitting lights of different colors. The second light source has second light-emitting portions arranged along the circumferential edge and emitting lights of different colors. Light emitted by one of the first light-emitting portions which is nearest to the second light-emitting portions is the same in color as light emitted by one of the second light-emitting portions which is nearest to the first light-emitting portions.Type: ApplicationFiled: May 23, 2012Publication date: November 29, 2012Inventors: Kazufumi WATABE, Masayuki Mifune, Takahiko Muneyoshi, Naohisa Andou, Mitsuhide Miyamoto
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Publication number: 20120287509Abstract: Provided is a display device, including: a light shielding film including a plurality of fixed apertures; a plurality of shutters; and a drive portion for driving each of the plurality of shutters. The plurality of fixed apertures each have an elongated shape including a long-side direction and a short-side direction, and include: fixed apertures of a first group in which the long-side direction is directed in a first direction; and fixed apertures of a second group in which the long-side direction is directed in a second direction orthogonal to the first direction. The plurality of shutters include: shutters of a first group, which correspond to the fixed apertures of the first group, respectively, and are linearly driven in the second direction; and shutters of a second group, which correspond to the fixed apertures of the second group, respectively, and are linearly driven in the first direction.Type: ApplicationFiled: May 7, 2012Publication date: November 15, 2012Inventors: Takahiko MUNEYOSHI, Naohisa Ando, Takahide Kuranaga, Mitsuhide Miyamoto, Kazufumi Watabe
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Publication number: 20120287508Abstract: Provided is a display device, including: a light shielding film including a plurality of fixed apertures, each allowing passage of light; a lens arranged above the plurality of fixed apertures; a plurality of shutters, which are arranged between the light shielding film and the lens and correspond to the plurality of fixed apertures, respectively, for controlling passage and blocking of the light; and a drive portion for driving each of the plurality of shutters to move between a position above each of the plurality of fixed apertures and a position retracted from each of the plurality of fixed apertures. The plurality of fixed apertures each have an elongated shape including a long-side direction and a short-side direction. The lens has a light refractive power that is larger in the short-side direction than in the long-side direction.Type: ApplicationFiled: May 7, 2012Publication date: November 15, 2012Inventors: Takahiko MUNEYOSHI, Naohisa ANDO, Takahide KURANAGA, Mitsuhide MIYAMOTO, Kazufumi WATABE
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Patent number: 7751007Abstract: A liquid crystal display device includes an orientation film on a liquid-crystal-side surface of at least one substrate out of respective substrates which are arranged to face each other with liquid crystal therebetween. The orientation film forms a pattern which is constituted of either a plurality of notches or holes which are spaced from one another on an edge of the orientation film which is beyond a periphery of a display region, and the pattern is formed along an entirety of the edge of the orientation film. The edge of the orientation film is formed along a periphery of the substrate.Type: GrantFiled: December 12, 2006Date of Patent: July 6, 2010Assignee: Hitachi Displays, Ltd.Inventors: Masateru Morimoto, Hirotaka Imayama, Ryoji Iwamura, Kazufumi Watabe, Hiromu Terao