Patents by Inventor Tadaaki Ikeda
Tadaaki Ikeda 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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Patent number: 10854790Abstract: A light emitting device includes a first light emitting element including a rectangular first light extraction surface, a second light emitting element including a rectangular second light extraction surface and emitting light having an emission peak wavelength different from an emission peak wavelength of the first light emitting element, and a light-transmissive member covering the first light extraction surface and the second light extraction surface. The light-transmissive member includes a first light-transmissive layer facing the first light extraction surface and the second light extraction surface, a wavelength conversion layer located on the first light-transmissive layer, and a second light-transmissive layer located on the wavelength conversion layer. The first light-transmissive layer contains a first matrix and first diffusive particles. The wavelength conversion layer contains a second matrix and wavelength conversion particles.Type: GrantFiled: December 21, 2018Date of Patent: December 1, 2020Assignee: NICHIA CORPORATIONInventors: Takuya Nakabayashi, Tadaaki Ikeda, Toru Hashimoto, Yukiko Yokote
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Publication number: 20200303599Abstract: A light emitting device is provided. The light emitting device includes a light emitting element, which emits blue light, and a light transmissive member having a first principal face bonded to the light emitting element and a second principal face opposite the first principal face. The light transmissive member has a light transmissive base material and wavelength conversion substances, which are contained in the base material and which absorb the light from the light emitting element and emit light. The wavelength conversion substances are localized in the base material towards the first principal face, and include a first phosphor which emits green to yellow light and a second phosphor which emits red light. The first phosphor is more localized towards the first principal face than the second phosphor. The second phosphor is a manganese-activated fluoride phosphor.Type: ApplicationFiled: June 10, 2020Publication date: September 24, 2020Applicant: NICHIA CORPORATIONInventors: Tadaaki IKEDA, Takuya NAKABAYASHI
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Publication number: 20200287095Abstract: A light-emitting device includes a substrate including a base member having an upper surface having a substantially rectangular shape, a lower surface opposite to the upper surface, a first longer lateral surface, a second longer lateral surface opposite to the first longer lateral surface, a first shorter lateral surface, and a second shorter lateral surface opposite to the first shorter lateral surface, first wirings disposed on the upper surface, and second wirings disposed on the lower surface and each electrically connected with a respective one of the first wirings; at least one light-emitting element; and a light-reflective covering member covering lateral surfaces of the light-emitting element and the upper surface of the base member. The base member has at least one first recess open at the upper surface and the first longer lateral surface. Surfaces defining the at least one first recess are covered with the covering member.Type: ApplicationFiled: May 26, 2020Publication date: September 10, 2020Applicant: NICHIA CORPORATIONInventors: Takuya NAKABAYASHI, Tadaaki IKEDA
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Patent number: 10734555Abstract: A light emitting device is provided. The light emitting device includes a light emitting element, which emits blue light, and a light transmissive member having a first principal face bonded to the light emitting element and a second principal face opposite the first principal face. The light transmissive member has a light transmissive base material and wavelength conversion substances, which are contained in the base material and which absorb the light from the light emitting element and emit light. The wavelength conversion substances are localized in the base material towards the first principal face, and include a first phosphor which emits green to yellow light and a second phosphor which emits red light. The first phosphor is more localized towards the first principal face than the second phosphor. The second phosphor is a manganese-activated fluoride phosphor.Type: GrantFiled: September 18, 2018Date of Patent: August 4, 2020Assignee: NICHIA CORPORATIONInventors: Tadaaki Ikeda, Takuya Nakabayashi
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Patent number: 10707384Abstract: A light-emitting device includes a substrate including a base member having an upper surface having a substantially rectangular shape, a lower surface opposite to the upper surface, a first longer lateral surface, a second longer lateral surface opposite to the first longer lateral surface, a first shorter lateral surface, and a second shorter lateral surface opposite to the first shorter lateral surface, first wirings disposed on the upper surface, and second wirings disposed on the lower surface and each electrically connected with a respective one of the first wirings; at least one light-emitting element; and a light-reflective covering member covering lateral surfaces of the light-emitting element and the upper surface of the base member. The base member has at least one first recess open at the upper surface and the first longer lateral surface. Surfaces defining the at least one first recess are covered with the covering member.Type: GrantFiled: July 5, 2018Date of Patent: July 7, 2020Assignee: NICHIA CORPORATIONInventors: Takuya Nakabayashi, Tadaaki Ikeda
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Patent number: 10700248Abstract: A light emitting device includes: a rectangular substrate, a light emitting element, a reflective member disposed at one or more lateral sides of the light emitting element while being away from therefrom, a light guide member, and a light transmissive member on the light guide member. The reflective member includes one or more first reflective members opposing lateral faces of the light emitting element, and a second reflective member outside the first reflective member. The first reflective members have inner lateral faces opposing each other each having an oblique or curved portion slanted so that a distance therebetween increases towards the light transmissive member from a side close to the substrate. The second reflective member covers outer lateral faces of the light transmissive member and the first reflective members, and an upper face of the second reflective member is flush with an upper face of the light transmissive member.Type: GrantFiled: August 20, 2019Date of Patent: June 30, 2020Assignee: NICHIA CORPORATIONInventors: Tadaaki Ikeda, Toru Hashimoto
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Publication number: 20200161498Abstract: A method for manufacturing a light emitting device includes: providing an intermediate structure including first and second layered structures arranged in a first direction in a light reflecting member, wherein each of the layered structures includes a first and second electrodes arranged in a second direction, and wherein the intermediate structure has a first surface at which the first and second electrodes are exposed; on the first surface, forming a first hole in the light reflecting member between the first electrodes as viewed in the second direction; on the first surface, forming a second hole in the light reflecting member between the second electrodes as viewed in the second direction; forming a conductive film on exposed surfaces of the first and second electrodes, and in the first and second holes; and severing the light reflecting member and the conductive film at positions that pass through the first and second holes.Type: ApplicationFiled: November 14, 2019Publication date: May 21, 2020Applicant: NICHIA CORPORATIONInventors: Tadaaki IKEDA, Toru HASHIMOTO
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Publication number: 20200152843Abstract: A light emitting element includes: a light reflecting member including a first region and a second region; a first semiconductor layered body disposed between the first region and the second region and configured to emit first light having a first peak wavelength; a second semiconductor layered body disposed between the first semiconductor layered body and the second region and configured to emit second light having a second peak wavelength different from the first peak wavelength; a base member disposed between the first semiconductor layered body and the second semiconductor layered body; and a wavelength conversion member on which the first light and the second light is incident, the wavelength conversion member producing third light having a third peak wavelength different from the first peak wavelength and the second peak wavelength.Type: ApplicationFiled: November 13, 2019Publication date: May 14, 2020Applicant: NICHIA CORPORATIONInventors: Yoshiki INOUE, Naoto FURUHA, Tadaaki IKEDA
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Publication number: 20200111940Abstract: A light-emitting device having an upper surface, a lower surface opposite to the upper surface, and a first lateral surface, the upper surface serving as a light-emitting surface, the first lateral surface being adjacent and orthogonal to the upper surface, the first lateral surface serving as a mounting surface, the light-emitting device including: a pair of a first metal films disposed at the lower surface; and a pair of second metal films disposed at the first lateral surface; wherein an area of each of the second metal films is larger than an area of each of the first metal films.Type: ApplicationFiled: October 7, 2019Publication date: April 9, 2020Applicant: NICHIA CORPORATIONInventor: Tadaaki IKEDA
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Publication number: 20200105729Abstract: A light emitting device includes a substrate including first, second, third and fourth wiring portions on a top surface of a base member and arrayed in a first direction, and a connection wiring portion connecting the second and third wiring portions. The connection wiring portion includes first and second connection ends respectively connected with the second and third wiring portions, and a connection central portion connecting the first and second connection ends and having a maximum width in a second direction different from each of a maximum width of the first connection end and a maximum width of the second connection end. In the second direction, at least a part of the connection wiring portion has a width narrower than each of a maximum width of the second wiring portion and a maximum width of the third wiring portion.Type: ApplicationFiled: September 26, 2019Publication date: April 2, 2020Applicant: NICHIA CORPORATIONInventors: Takuya NAKABAYASHI, Tadaaki IKEDA, Tetsuya ISHIKAWA
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Publication number: 20200098964Abstract: The method of manufacturing a light emitting device includes: providing a first intermediate body, the first intermediate body including a temporary substrate including a base and a pair of first wirings, and a light emitting element including a pair of element electrodes, each of the pair of element electrodes connected to a respective one of the first wirings via a respective one of a plurality of solders; removing a portion of the temporary substrate to form a second intermediate body having a second lower surface in which a lower surface of each of the element electrodes and a lower surface of each of the plurality of solders are located; and forming a pair of external connection electrodes on the second lower surface such that each of the pair of external connection electrodes cover a respective one of the element electrodes and a respective one of the plurality of solders.Type: ApplicationFiled: September 25, 2019Publication date: March 26, 2020Applicant: NICHIA CORPORATIONInventors: Toru HASHIMOTO, Yoichi BANDO, Tadaaki IKEDA, Gensui TAMURA
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Publication number: 20200035874Abstract: A light-emitting device has a longitudinal direction and a width direction perpendicular to the longitudinal direction, and includes a first light-emitting element, a second light-emitting element having a peak emission wavelength different from a peak emission wavelength of the first light-emitting element and being aligned with the first light-emitting element in the longitudinal direction, a light-transmissive member covering a first element light extracting surface and a second element light extracting surface such that a portion of a light-guide member is located between the light-transmissive member and each of the first element light extracting surface and the second element light extracting surface, a first reflective member surrounding the first light-emitting element, the second light-emitting element, and the light-guide member in a top view, and a first inclined member between the first light-emitting element and the first reflective member in the longitudinal direction and having an inclined surfType: ApplicationFiled: July 23, 2019Publication date: January 30, 2020Applicant: NICHIA CORPORATIONInventors: Takuya NAKABAYASHI, Yukiko YOKOTE, Tadaaki IKEDA
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Patent number: 10504876Abstract: A light-emitting device includes a mounting board, a first light-emitting element, a second light-emitting element and a light-reflective covering member. The mounting board includes first lands and second lands on an upper surface of the mounting board. The first light-emitting element is flip-chip mounted on the first lands. The second light-emitting element is flip-chip mounted on the second lands. The light-reflective covering member covers a lateral surface of the first light-emitting element, a lateral surface of the second light-emitting element, and the upper surface of the mounting board. The mounting board and the light-reflective covering member define a depressed portion between the first light-emitting element and the second light-emitting element with a bottom surface of the depressed portion being located inside the mounting board.Type: GrantFiled: February 6, 2018Date of Patent: December 10, 2019Assignee: NICHIA CORPORATIONInventors: Takuya Nakabayashi, Tadaaki Ikeda
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Publication number: 20190371986Abstract: A light emitting device includes: a rectangular substrate, a light emitting element, a reflective member disposed at one or more lateral sides of the light emitting element while being away from therefrom, a light guide member, and a light transmissive member on the light guide member. The reflective member includes one or more first reflective members opposing lateral faces of the light emitting element, and a second reflective member outside the first reflective member. The first reflective members have inner lateral faces opposing each other each having an oblique or curved portion slanted so that a distance therebetween increases towards the light transmissive member from a side close to the substrate. The second reflective member covers outer lateral faces of the light transmissive member and the first reflective members, and an upper face of the second reflective member is flush with an upper face of the light transmissive member.Type: ApplicationFiled: August 20, 2019Publication date: December 5, 2019Applicant: NICHIA CORPORATIONInventors: Tadaaki IKEDA, Toru HASHIMOTO
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Patent number: 10446725Abstract: A light emitting device includes a mounting board, first and second light emitting elements and a light reflective covering member. The mounting board includes an insulating base, first and second lands arranged, and an intermediate part arranged between the first and second lands. The first and second light emitting elements are flip-chip mounted on the first and second lands, respectively. The light reflective covering member is provided above the intermediate part and covers lateral surfaces of the first and second light emitting elements. The light reflective covering member defines a recess part arranged above the intermediate part with a bottom of the recess part being positioned below top surfaces of the first and second light emitting elements and above the top surface of the intermediate part, and a surface of the light reflective covering member defining the recess part constitutes a part of an outer surface of the light emitting device.Type: GrantFiled: February 5, 2018Date of Patent: October 15, 2019Assignee: NICHIA CORPORATIONInventors: Takuya Nakabayashi, Tadaaki Ikeda
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Patent number: 10431724Abstract: A light emitting device includes: a rectangular substrate, a light emitting element, a reflective member disposed at one or more lateral sides of the light emitting element while being away from therefrom, a light guide member, and a light transmissive member on the light guide member. The reflective member includes one or more first reflective members opposing lateral faces of the light emitting element, and a second reflective member outside the first reflective member. The first reflective members have inner lateral faces opposing each other each having an oblique or curved portion slanted so that a distance therebetween increases towards the light transmissive member from a side close to the substrate. The second reflective member covers outer lateral faces of the light transmissive member and the first reflective members, and an upper face of the second reflective member is flush with an upper face of the light transmissive member.Type: GrantFiled: May 11, 2018Date of Patent: October 1, 2019Assignee: NICHIA CORPORATIONInventors: Tadaaki Ikeda, Toru Hashimoto
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Patent number: 10367121Abstract: A method of manufacturing a package, the method comprising the steps of: preparing a resin compact having a recess, and including a pair of leads arranged at a bottom surface of the recess, a first resin body forming a lateral wall of the recess, and a second resin body arranged between the pair of leads; forming a reflective film entirely on at least the bottom surface of the recess and an inner surface of the lateral wall of the recess; and removing the reflective film formed on the pair of leads in the recess in the resin compact on which the reflective film has been formed.Type: GrantFiled: December 6, 2017Date of Patent: July 30, 2019Assignee: NICHIA CORPORATIONInventors: Tadaaki Ikeda, Masaki Hayashi, Koji Abe, Kimihiro Miyamoto
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Publication number: 20190198722Abstract: A light emitting device includes a first light emitting element including a rectangular first light extraction surface, a second light emitting element including a rectangular second light extraction surface and emitting light having an emission peak wavelength different from an emission peak wavelength of the first light emitting element, and a light-transmissive member covering the first light extraction surface and the second light extraction surface. The light-transmissive member includes a first light-transmissive layer facing the first light extraction surface and the second light extraction surface, a wavelength conversion layer located on the first light-transmissive layer, and a second light-transmissive layer located on the wavelength conversion layer. The first light-transmissive layer contains a first matrix and first diffusive particles. The wavelength conversion layer contains a second matrix and wavelength conversion particles.Type: ApplicationFiled: December 21, 2018Publication date: June 27, 2019Applicant: NICHIA CORPORATIONInventors: Takuya NAKABAYASHI, Tadaaki IKEDA, Toru HASHIMOTO, Yukiko YOKOTE
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Patent number: 10270011Abstract: A light emitting device includes a base body, a light emitting element and a sealing member. The base body includes a base material and a pair of connection terminals on at least a first main surface of the base material. The light emitting element is connected to the connection terminals. The sealing member seals the light emitting element. The sealing member includes a light transmissive member disposed on an upper surface of the light emitting element, and a light shielding member sealing an end surface of the light emitting element and an end surface of the light transmissive member. The base material has a linear expansion coefficient within ±10 ppm/° C. of a linear expansion coefficient of the light emitting element.Type: GrantFiled: March 24, 2017Date of Patent: April 23, 2019Assignee: NICHIA CORPORATIONInventors: Takuya Nakabayashi, Takeshi Ikegami, Tadaaki Ikeda, Tadao Hayashi, Hiroto Tamaki
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Patent number: RE47453Abstract: A chip-type light-emitting semiconductor device includes: a substrate 4; a blue LED 1 mounted on the substrate 4; and a luminescent layer 3 made of a mixture of yellow/yellowish phosphor particles 2 and a base material 13 (translucent resin). The yellow/yellowish phosphor particles 2 is a silicate phosphor which absorbs blue light emitted by the blue LED 1 to emit a fluorescence having a main emission peak in the wavelength range from 550 nm to 600 nm, inclusive, and which contains, as a main component, a compound expressed by the chemical formula: (Sr1-a1-b1-xBaa1Cab1Eux)2SiO4 (0?a1?0.3, 0?b1?0.8 and 0<x<1). The silicate phosphor particles disperse substantially evenly in the resin easily. As a result, excellent white light is obtained.Type: GrantFiled: July 5, 2016Date of Patent: June 25, 2019Assignee: Panasonic CorporationInventors: Toshihide Maeda, Shozo Oshio, Katsuaki Iwama, Hiromi Kitahara, Tadaaki Ikeda, Kei Sakanoue, Hidenori Kamei, Yasuyuki Hanada