Patents by Inventor Masashi Miwa
Masashi Miwa 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).
-
Publication number: 20140192497Abstract: A display module 15 includes a display panel; a frame member 50 located on a rear surface of the display panel; a wiring board 60 located on a rear surface of the frame member 50; a first adhesive tape 55, both of two surfaces of which are adhesive, the first adhesive tape 55 being located between the frame member 50 and the wiring board 60 for securing the wiring board 60 and the frame member 50 to each other; and a second adhesive tape 70 pasted to a rear surface of the wiring board 60. The first adhesive tape 55 and the second adhesive tape 70 are directly bonded to each other.Type: ApplicationFiled: May 7, 2012Publication date: July 10, 2014Applicant: SHARP KABUSHIKI KAISHAInventors: Hiroaki Isobe, Masashi Miwa
-
Patent number: 8383252Abstract: The present invention has aimed to provide a method which is capable of producing a rare earth magnet having a protective layer that can provide a sufficient water resistance. The present invention provides a method for producing a rare earth magnet comprising a magnet body containing a rare earth element and a protective layer with high water resistance formed on the surface of the magnet body, the method comprising a first step in which a zinc compound soluble in an alkaline solution is dissolved in an alkali silicate solution to prepare a treatment solution, a second step in which the treatment solution is attached on the surface of the magnet body, and a third step in which the treatment solution attached on the magnet body surface is cured to form a protective layer comprising the cured product of the treatment solution.Type: GrantFiled: September 25, 2008Date of Patent: February 26, 2013Assignee: TDK CorporationInventors: Masashi Miwa, Jun Hagiwara
-
Patent number: 8292488Abstract: A backlight unit is provided that, for a case where on a mounting board on which a plurality of point light sources are mounted, an electronic component other than those point light sources is mounted, can reduce the occurrence of uneven luminance, with no increase in the size of the backlight unit. This backlight unit (10) is provided with a PWB (6) having at least an LED mounting region (6a) extending along a side surface (3a) of a light guide plate (3). The LED mounting region (6a) of the PWB (6) is, at an end portion thereof on one side, provided with an FPC mounting region (6b) and is, at an end portion thereof on the other side opposite to the one side, provided with a capacitor mounting region (6c) extending along a side surface (3b) perpendicular to the side surface (3a) of the light guide plate (3).Type: GrantFiled: October 24, 2007Date of Patent: October 23, 2012Assignee: Sharp Kabushiki KaishaInventors: Kazuki Ohfuku, Masashi Miwa, Masakazu Takeuchi
-
Publication number: 20120112862Abstract: A rare-earth element including a magnet body containing a rare-earth element, and a protective layer formed on a surface of the magnet body. The protective layer may include a first layer covering the magnet body and containing a rare-earth element, and a second layer covering the first layer and containing substantially no rare-earth element. Another protective layer in accordance may include an inner protective layer and an outer protective layer successively from the magnet body side. The outer protective layer is any of an oxide layer, a resin layer, a metal salt layer, and a layer containing an organic-inorganic hybrid compound.Type: ApplicationFiled: January 17, 2012Publication date: May 10, 2012Applicant: TDK CORPORATIONInventors: Masashi MIWA, Takeshi Sakamoto, Jun Hagiwara, Masami Mori
-
Publication number: 20110234348Abstract: A rare-earth magnet is an R-T-B-based rare-earth magnet containing a rare-earth element R, a transition metal element T, and boron B. The rare-earth magnet further contains Cu and Co, while having a Cu concentration distribution with a gradient along a direction from a surface of the rare-earth magnet to the inside thereof, Cu having a higher concentration on the surface side of the rare-earth magnet than on the inside thereof, and a Co concentration distribution with a gradient along a direction from the surface of the rare-earth magnet to the inside thereof, Co having a higher concentration on the surface side of the rare-earth magnet than on the inside thereof. The rare-earth magnet is excellent in corrosion resistance.Type: ApplicationFiled: March 21, 2011Publication date: September 29, 2011Applicant: TDK CORPORATIONInventors: Masashi MIWA, Yasuyuki KAWANAKA, Masahiro OISHI
-
Publication number: 20100182539Abstract: A plurality of LEDs (11) in an LED group (GP) are arranged in the longitudinal direction of an incident surface (21s) of a light guide plate (21) to form LED rows (12a and 12b). These two LED rows (12a and 12b) are arranged in a direction intersecting the incident surface (21s).Type: ApplicationFiled: January 18, 2008Publication date: July 22, 2010Inventors: Chiaki Ohyama, Masashi Miwa
-
Publication number: 20100053995Abstract: A backlight unit is provided that, for a case where on a mounting board on which a plurality of point light sources are mounted, an electronic component other than those point light sources is mounted, can reduce the occurrence of uneven luminance, with no increase in the size of the backlight unit. This backlight unit (10) is provided with a PWB (6) having at least an LED mounting region (6a) extending along a side surface (3a) of a light guide plate (3). The LED mounting region (6a) of the PWB (6) is, at an end portion thereof on one side, provided with an FPC mounting region (6b) and is, at an end portion thereof on the other side opposite to the one side, provided with a capacitor mounting region (6c) extending along a side surface (3b) perpendicular to the side surface (3a) of the light guide plate (3).Type: ApplicationFiled: October 24, 2007Publication date: March 4, 2010Inventors: Kazuki Ohfuku, Masashi Miwa, Masakazu Takeuchi
-
Publication number: 20090087672Abstract: The present invention has aimed to provide a method which is capable of producing a rare earth magnet having a protective layer that can provide a sufficient water resistance. The present invention provides a method for producing a rare earth magnet comprising a magnet body containing a rare earth element and a protective layer with high water resistance formed on the surface of the magnet body, the method comprising a first step in which a zinc compound soluble in an alkaline solution is dissolved in an alkali silicate solution to prepare a treatment solution, a second step in which the treatment solution is attached on the surface of the magnet body, and a third step in which the treatment solution attached on the magnet body surface is cured to form a protective layer comprising the cured product of the treatment solution.Type: ApplicationFiled: September 25, 2008Publication date: April 2, 2009Applicant: TDK CORPORATIONInventors: Masashi MIWA, Jun HAGIWARA
-
Publication number: 20080202642Abstract: The present invention aims to provide a rare earth magnet having sufficiently excellent anticorrosion property. The rare earth magnet 1 according to the present invention to solve the above problems includes a magnet body 10 containing rare earth elements, a substantial amorphous layer 20 formed on a surface of the magnet body 10, and a protecting layer 30 on a surface of the amorphous layer 20, and the amorphous layer 20 contains material identical to main component elements of magnet material contained in the magnet body 10.Type: ApplicationFiled: March 28, 2005Publication date: August 28, 2008Applicant: TDK CORPORATIONInventors: Takeshi Sakamoto, Masami Mori, Yoshitomo Tanaka, Masashi Miwa
-
Publication number: 20080050581Abstract: The object of the present invention is to provide a rare-earth magnet having a sufficient corrosion resistance, and a method of manufacturing the same. The rare-earth element in accordance with a preferred embodiment comprises a magnet body containing a rare-earth element, and a protective layer formed on a surface of the magnet body. The protective layer in accordance with a preferred embodiment includes a first layer covering the magnet body and containing a rare-earth element, and a second layer covering the first layer and containing substantially no rare-earth element. Another protective layer in accordance with a preferred embodiment comprises an inner protective layer and an outer protective layer successively from the magnet body side. The outer protective layer is any of an oxide layer, a resin layer, a metal salt layer, and a layer containing an organic-inorganic hybrid compound.Type: ApplicationFiled: March 31, 2005Publication date: February 28, 2008Applicant: TDK CORPORATIONInventors: Masashi Miwa, Takeshi Sakamoto, Jun Hagiwara, Masami Mori, Mutsuko Nakano, Hiroshi Kawahara, Hiroki Kitamura
-
Patent number: 6803122Abstract: The invention aims to solve the problem of prior art EL devices that undesirable defects form in dielectric layers, and especially the problems of EL devices having dielectric layers of lead-base dielectric material including a lowering, variation and change with time of the luminance of light emission, and thereby provide an EL device ensuring high display quality without increasing the cost. Such objects are achieved by an EL device comprising at least an electrically insulating substrate 11 and a structure including an electrode layer 12, a dielectric layer 13, 14, 15, a light emitting layer 17 and a transparent electrode layer 19 stacked on the substrate 11, wherein the dielectric layer is a laminate including a first thick-film ceramic high-permittivity dielectric layer 13 whose composition contains at least lead, a second high-permittivity layer 14 whose composition contains at least lead, and a third high-permittivity layer 15 whose composition is free of at least lead.Type: GrantFiled: April 29, 2002Date of Patent: October 12, 2004Assignee: TDK CorporationInventors: Yukihiko Shirakawa, Masashi Miwa, Katsuto Nagano, Yoshihiko Yano
-
Patent number: 6677059Abstract: The invention aims to solve the problem of prior art EL devices that undesirable defects form in dielectric layers, and especially the problems of EL devices having dielectric layers of lead-base dielectric material including a lowering, variation and change with time of the luminance of light emission, and thereby provide an EL device ensuring high display quality and a method for manufacturing the same at a low cost.Type: GrantFiled: May 30, 2001Date of Patent: January 13, 2004Assignee: TDK CorporationInventors: Yukihiko Shirakawa, Masashi Miwa, Katsuto Nagano
-
Patent number: 6650046Abstract: The invention aims to provide, without incurring any cost increase, a thin-film EL device comprising a multilayer dielectric layer formed of a lead-based dielectric material by a solution coating-and-firing process, which has solved problems including light emission luminance drops, luminance variations and changes of light emission luminance with time, thereby achieving high display quality, and a process for the fabrication of the same. The object is accomplished by forming a patterned electrode layer on an electrically insulating substrate and constructing thereon a dielectric layer having a multilayer structure wherein lead-based dielectric layers formed by repeating the solution coating-and-firing process plural times and a non-lead-based, high-permittivity dielectric layer are stacked, the uppermost surface layer of the dielectric layer having a multilayer structure being the non-lead-based, high-permittivity dielectric layer.Type: GrantFiled: November 19, 2001Date of Patent: November 18, 2003Assignee: TDK CorporationInventors: Yukihiko Shirakawa, Masashi Miwa, Katsuto Nagano, Yoshihiko Yano
-
Patent number: 6577059Abstract: The invention has for its object to provide a thin-film EL device comprising a multilayer dielectric layer formed of a lead-based dielectric material by a solution coating-and-firing process, which provides a solution to problems in conjunction with its light emission luminance drops, luminance variations and changes of light emission luminance with time, thereby achieving high display quality, and a process for the fabrication of the same. This is accomplished by the provision of a thin-film EL device comprising a patterned electrode stacked on an electrically insulating substrate and a dielectric layer having a multilayer structure wherein at least one lead-based dielectric layer formed by repeating the solution coating-and-firing process one or more times and at least one non-lead, high-dielectric-constant dielectric layer are stacked together, and the uppermost surface layer of the dielectric layer having such a multilayer structure is defined by the non-lead, high-dielectric-constant dielectric layer.Type: GrantFiled: May 30, 2001Date of Patent: June 10, 2003Assignee: TDK CorporationInventors: Yukihiko Shirakawa, Masashi Miwa, Katsuto Nagano
-
Publication number: 20020177008Abstract: The invention aims to solve the problem of prior art EL devices that undesirable defects form in dielectric layers, and especially the problems of EL devices having dielectric layers of lead-base dielectric material including a lowering, variation and change with time of the luminance of light emission, and thereby provide an EL device ensuring high display quality without increasing the cost. Such objects are achieved by an EL device comprising at least an electrically insulating substrate 11 and a structure including an electrode layer 12, a dielectric layer 13, 14, 15, a light emitting layer 17 and a transparent electrode layer 19 stacked on the substrate 11, wherein the dielectric layer is a laminate including a first thick-film ceramic high-permittivity dielectric layer 13 whose composition contains at least lead, a second high-lead, layer 14 whose composition contains at least lead, and a third high-permittivity layer 15 whose composition is free of at least lead.Type: ApplicationFiled: April 29, 2002Publication date: November 28, 2002Applicant: TDK CORPORATIONInventors: Yukihiko Shirakawa, Masashi Miwa, Katsuto Nagano, Yoshihiko Yano
-
Publication number: 20020130616Abstract: The invention aims to provide, without incurring any cost increase, a thin-film EL device comprising a multilayer dielectric layer formed of a lead-based dielectric material by a solution coating-and-firing process, which has solved problems including light emission luminance drops, luminance variations and changes of light emission luminance with time, thereby achieving high display quality, and a process for the fabrication of the same. The object is accomplished by forming a patterned electrode layer on an electrically insulating substrate and constructing thereon a dielectric layer having a multilayer structure wherein lead-based dielectric layers formed by repeating the solution coating-and-firing process plural times and a non-lead-based, high-permittivity dielectric layer are stacked, the uppermost surface layer of the dielectric layer having a multilayer structure being the non-lead-based, high-permittivity dielectric layer.Type: ApplicationFiled: November 19, 2001Publication date: September 19, 2002Applicant: TDK CORPORATIONInventors: Yukihiko Shirakawa, Masashi Miwa, Katsuto Nagano, Yoshihiko Yano
-
Publication number: 20020127429Abstract: The invention aims to solve the problem of prior art EL devices that undesirable defects form in dielectric layers, and especially the problems of EL devices having dielectric layers of lead-base dielectric material including a lowering, variation and change with time of the luminance of light emission, and thereby provide an EL device ensuring high display quality and a method for manufacturing the same at a low cost.Type: ApplicationFiled: May 30, 2001Publication date: September 12, 2002Applicant: TDK CORPORATIONInventors: Yukihiko Shirakawa, Masashi Miwa, Katsuto Nagano
-
Publication number: 20020105264Abstract: The invention has for its object to provide a thin-film EL device comprising a multilayer dielectric layer formed of a lead-based dielectric material by a solution coating-and-firing process, which provides a solution to problems in conjunction with its light emission luminance drops, luminance variations and changes of light emission luminance with time, thereby achieving high display quality, and a process for the fabrication of the same. This is accomplished by the provision of a thin-film EL device comprising a patterned electrode stacked on an electrically insulating substrate and a dielectric layer having a multilayer structure wherein lead-based dielectric layer(s) formed by repeating the solution coating-and-firing process plural times and non-lead, high-dielectric-constant dielectric layer(s) are stacked together, and the uppermost surface layer of the dielectric layer having such a multilayer structure is defined by the non-lead, high-dielectric-constant dielectric layer.Type: ApplicationFiled: May 30, 2001Publication date: August 8, 2002Applicant: TDK CORPORATIONInventors: Yukihiko Shirakawa, Masashi Miwa, Katsuto Nagano