Patents by Inventor Naoki ISHIMI
Naoki ISHIMI 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: 20230176420Abstract: An object is to promote a reduction in thickness of a light guide plate and to provide a technique for suppressing brightness non-uniformity in the light guide plate. A light guide plate includes: a depressed portion provided on an opposite side of a light exit surface from which light is emitted; a first direction changing portion which is provided inside the depressed portion and above a light emitting element in a direction oriented toward the light exit surface, the light emitting element being provided on the opposite side of the light exit surface, and which changes a direction of travel of at least a part of light of the light emitting element; and a second direction changing portion which is provided above the light emitting element and higher than the light exit surface and which changes a direction of travel of at least a part of light of the light emitting element.Type: ApplicationFiled: January 31, 2023Publication date: June 8, 2023Applicant: NICHIA CORPORATIONInventors: Shotaro WATANABE, Naoki ISHIMI, Yoshinori ITO, Tomokazu SHIMODA
-
Patent number: 11624865Abstract: To provide a technique for suppressing brightness non-uniformity of an area illuminated by a light source and also suppressing a decline in contrast between areas caused by incidence of a luminous flux of the area to another area. Provided is a light guide plate including: a diverging portion which is provided on an opposite side of a light exit surface from which light is emitted, the diverging portion causing a luminous flux emitted from a light emitting element to diverge; and a restricting portion which is provided, when a prescribed range from the light emitting element on the light exit surface is defined as an illuminated area illuminated by the light emitting element, in at least a periphery of the illuminated area on the light exit surface and which deflects or shields light traveling from inside toward outside of the illuminated area to restrict traveling, toward a side of the light exit surface, of light traveling toward the outside of the illuminated area.Type: GrantFiled: January 13, 2022Date of Patent: April 11, 2023Assignee: NICHIA CORPORATIONInventors: Shotaro Watanabe, Naoki Ishimi, Yoshinori Ito, Tomokazu Shimoda
-
Publication number: 20220146734Abstract: To provide a technique for suppressing brightness non-uniformity of an area illuminated by a light source and also suppressing a decline in contrast between areas caused by incidence of a luminous flux of the area to another area. Provided is a light guide plate including: a diverging portion which is provided on an opposite side of a light exit surface from which light is emitted, the diverging portion causing a luminous flux emitted from a light emitting element to diverge; and a restricting portion which is provided, when a prescribed range from the light emitting element on the light exit surface is defined as an illuminated area illuminated by the light emitting element, in at least a periphery of the illuminated area on the light exit surface and which deflects or shields light traveling from inside toward outside of the illuminated area to restrict traveling, toward a side of the light exit surface, of light traveling toward the outside of the illuminated area.Type: ApplicationFiled: January 13, 2022Publication date: May 12, 2022Applicant: NICHIA CORPORATIONInventors: Shotaro WATANABE, Naoki ISHIMI, Yoshinori ITO, Tomokazu SHIMODA
-
Patent number: 11300722Abstract: An object is to promote a reduction in thickness of a light guide plate and suppress brightness non-uniformity of the light guide plate. A light guide plate, including: a light exit surface from which light is emitted; an opposite surface on an opposite side of the light exit surface; a depressed portion provided on the opposite surface; and a plurality of scattering portions which are provided on the light exit surface, the opposite surface, and a bottom surface of the depressed portion and which refract and scatter light, wherein the depressed portion has a tapered surface which spreads from the bottom surface of the depressed portion toward an opening of the depressed portion.Type: GrantFiled: October 19, 2020Date of Patent: April 12, 2022Assignee: NICHIA CORPORATIONInventors: Shotaro Watanabe, Kazuhide Hirota, Naoki Ishimi
-
Patent number: 11256017Abstract: To provide a technique for suppressing brightness non-uniformity of an area illuminated by a light source and also suppressing a decline in contrast between areas caused by incidence of a luminous flux of the area to another area. Provided is a light guide plate including: a diverging portion which is provided on an opposite side of a light exit surface from which light is emitted, the diverging portion causing a luminous flux emitted from a light emitting element to diverge; and a restricting portion which is provided, when a prescribed range from the light emitting element on the light exit surface is defined as an illuminated area illuminated by the light emitting element, in at least a periphery of the illuminated area on the light exit surface and which deflects or shields light traveling from inside toward outside of the illuminated area to restrict traveling, toward a side of the light exit surface, of light traveling toward the outside of the illuminated area.Type: GrantFiled: October 22, 2020Date of Patent: February 22, 2022Assignee: NICHIA CORPORATIONInventors: Shotaro Watanabe, Naoki Ishimi, Yoshinori Ito, Tomokazu Shimoda
-
Publication number: 20210041617Abstract: To provide a technique for suppressing brightness non-uniformity of an area illuminated by a light source and also suppressing a decline in contrast between areas caused by incidence of a luminous flux of the area to another area. Provided is a light guide plate including: a diverging portion which is provided on an opposite side of a light exit surface from which light is emitted, the diverging portion causing a luminous flux emitted from a light emitting element to diverge; and a restricting portion which is provided, when a prescribed range from the light emitting element on the light exit surface is defined as an illuminated area illuminated by the light emitting element, in at least a periphery of the illuminated area on the light exit surface and which deflects or shields light traveling from inside toward outside of the illuminated area to restrict traveling, toward a side of the light exit surface, of light traveling toward the outside of the illuminated area.Type: ApplicationFiled: October 22, 2020Publication date: February 11, 2021Applicant: NICHIA CORPORATIONInventors: Shotaro WATANABE, Naoki ISHIMI, Yoshinori ITO, Tomokazu SHIMODA
-
Publication number: 20210033772Abstract: An object is to promote a reduction in thickness of a light guide plate and suppress brightness non-uniformity of the light guide plate. A light guide plate, including: a light exit surface from which light is emitted; an opposite surface on an opposite side of the light exit surface; a depressed portion provided on the opposite surface; and a plurality of scattering portions which are provided on the light exit surface, the opposite surface, and a bottom surface of the depressed portion and which refract and scatter light, wherein the depressed portion has a tapered surface which spreads from the bottom surface of the depressed portion toward an opening of the depressed portion.Type: ApplicationFiled: October 19, 2020Publication date: February 4, 2021Applicant: NICHIA CORPORATIONInventors: Shotaro WATANABE, Kazuhide HIROTA, Naoki ISHIMI
-
Patent number: 10852467Abstract: Provided is a light guide plate including: a diverging portion which is provided on an opposite side of a light exit surface from which light is emitted, the diverging portion causing a luminous flux emitted from a light emitting element to diverge; and a restricting portion which is provided, when a prescribed range from the light emitting element on the light exit surface is defined as an illuminated area illuminated by the light emitting element, in at least a periphery of the illuminated area on the light exit surface and which deflects or shields light traveling from inside toward outside of the illuminated area to restrict traveling, toward a side of the light exit surface, of light traveling toward the outside of the illuminated area.Type: GrantFiled: December 5, 2017Date of Patent: December 1, 2020Assignee: NICHIA CORPORATIONInventors: Shotaro Watanabe, Naoki Ishimi, Yoshinori Ito, Tomokazu Shimoda
-
Patent number: 10845524Abstract: An object is to promote a reduction in thickness of a light guide plate and suppress brightness non-uniformity of the light guide plate. A light guide plate, including: a light exit surface from which light is emitted; an opposite surface on an opposite side of the light exit surface; a depressed portion provided on the opposite surface; and a plurality of scattering portions which are provided on the light exit surface, the opposite surface, and a bottom surface of the depressed portion and which refract and scatter light, wherein the depressed portion has a tapered surface which spreads from the bottom surface of the depressed portion toward an opening of the depressed portion.Type: GrantFiled: December 5, 2017Date of Patent: November 24, 2020Assignee: NICHIA CORPORATIONInventors: Shotaro Watanabe, Kazuhide Hirota, Naoki Ishimi
-
Publication number: 20200049876Abstract: An object is to promote a reduction in thickness of a light guide plate and suppress brightness non-uniformity of the light guide plate. A light guide plate, including: a light exit surface from which light is emitted; an opposite surface on an opposite side of the light exit surface; a depressed portion provided on the opposite surface; and a plurality of scattering portions which are provided on the light exit surface, the opposite surface, and a bottom surface of the depressed portion and which refract and scatter light, wherein the depressed portion has a tapered surface which spreads from the bottom surface of the depressed portion toward an opening of the depressed portion.Type: ApplicationFiled: December 5, 2017Publication date: February 13, 2020Applicants: OMRON Corporation, NICHIA CORPORATIONInventors: Shotaro WATANABE, Kazuhide HIROTA, Naoki ISHIMI
-
Publication number: 20200049877Abstract: Provided is a light guide plate including: a diverging portion which is provided on an opposite side of a light exit surface from which light is emitted, the diverging portion causing a luminous flux emitted from a light emitting element to diverge; and a restricting portion which is provided, when a prescribed range from the light emitting element on the light exit surface is defined as an illuminated area illuminated by the light emitting element, in at least a periphery of the illuminated area on the light exit surface and which deflects or shields light traveling from inside toward outside of the illuminated area to restrict traveling, toward a side of the light exit surface, of light traveling toward the outside of the illuminated area.Type: ApplicationFiled: December 5, 2017Publication date: February 13, 2020Applicants: OMRON Corporation, NICHIA CORPORATIONInventors: Shotaro WATANABE, Naoki ISHIMI, Yoshinori ITO, Tomokazu SHIMODA
-
Publication number: 20190227382Abstract: A light guide plate includes: a depressed portion provided on an opposite side of a light exit surface from which light is emitted; a first direction changing portion which is provided inside the depressed portion and above a light emitting element in a direction oriented toward the light exit surface, the light emitting element being provided on the opposite side of the light exit surface, and which changes a direction of travel of at least a part of light of the light emitting element; and a second direction changing portion which is provided above the light emitting element and higher than the light exit surface and which changes a direction of travel of at least a part of light of the light emitting element.Type: ApplicationFiled: December 5, 2017Publication date: July 25, 2019Applicants: OMRON Corporation, NICHIA CORPORATIONInventors: Shotaro WATANABE, Naoki ISHIMI, Yoshinori ITO, Tomokazu SHIMODA