Patents by Inventor Chun Shan Chen
Chun Shan Chen 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: 20190258030Abstract: An imaging lens system comprises, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with refractive power; a third lens element with refractive power having object-side and image-side surfaces being aspheric, at least one surface thereof having at least one inflection point; a fourth lens element with refractive power having a concave object-side surface and a convex image-side surface; a fifth lens element with refractive power having an aspheric object-side surface and an aspheric concave image-side surface, the image-side surface thereof having at least one inflection point.Type: ApplicationFiled: May 1, 2019Publication date: August 22, 2019Inventor: CHUN-SHAN CHEN
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Patent number: 10353179Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being convex in a paraxial region thereof, wherein at least one surface of the fifth lens element is aspheric. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region thereof, wherein at least one surface of the sixth lens element is aspheric, and the image-side surface of the sixth lens element has at least one inflection point thereon.Type: GrantFiled: December 20, 2017Date of Patent: July 16, 2019Assignee: LARGAN PRECISION CO., LTD.Inventors: Chun-Shan Chen, Tsung-Han Tsai, Ming-Ta Chou
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Patent number: 10324276Abstract: An imaging lens system comprises, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with refractive power; a third lens element with refractive power having object-side and image-side surfaces being aspheric, at least one surface thereof having at least one inflection point; a fourth lens element with refractive power having a concave object-side surface and a convex image-side surface; a fifth lens element with refractive power having an aspheric object-side surface and an aspheric concave image-side surface, the image-side surface thereof having at least one inflection point.Type: GrantFiled: September 29, 2017Date of Patent: June 18, 2019Assignee: LARGAN PRECISION CO., LTD.Inventor: Chun-Shan Chen
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Patent number: 10209487Abstract: An optical imaging system includes, in order from an object side to an image side, a first lens element with positive refractive power, a second lens element, a third lens element, a fourth lens element, and a fifth lens element. Each of the fourth lens element and the fifth lens element includes at least one aspheric surface. The fourth lens element and the fifth lens element are made of plastic. The fifth lens element includes a concave image-side surface and at least one inflection point. An axial distance is formed between each of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element, and the optical imaging system further comprises a stop.Type: GrantFiled: March 23, 2017Date of Patent: February 19, 2019Assignee: LARGAN PRECISION CO., LTD.Inventors: Chun-Shan Chen, Tsung-Han Tsai, Hsin-Hsuan Huang
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Patent number: 10185128Abstract: An optical photographing lens assembly includes five lens elements, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface in a paraxial region thereof. The second lens element with negative refractive power has a convex object-side surface and a concave image-side surface in a paraxial region thereof. The fourth lens element with positive refractive power has a convex image-side surface in a paraxial region thereof. The fifth lens element with negative refractive power has a concave image-side surface in a paraxial region thereof, wherein the image-side surface of the fifth lens element has at least one convex critical point in an off-axial region thereof, and two surfaces of the fifth lens element are both aspheric.Type: GrantFiled: July 11, 2017Date of Patent: January 22, 2019Assignee: LARGAN Precision Co., Ltd.Inventors: Chun-Che Hsueh, Wei-Yu Chen, Chun-Shan Chen, Hsuan-Chin Huang, Kuan-Ting Yeh
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Publication number: 20180292631Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being convex in a paraxial region thereof, wherein at least one surface of the fifth lens element is aspheric. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region thereof, wherein at least one surface of the sixth lens element is aspheric, and the image-side surface of the sixth lens element has at least one inflection point thereon.Type: ApplicationFiled: June 15, 2018Publication date: October 11, 2018Inventors: Chun-Shan CHEN, Tsung-Han TSAI, Ming-Ta CHOU
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Publication number: 20180239114Abstract: An optical photographing lens assembly includes five lens elements, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface in a paraxial region thereof. The second lens element with negative refractive power has a convex object-side surface and a concave image-side surface in a paraxial region thereof. The fourth lens element with positive refractive power has a convex image-side surface in a paraxial region thereof. The fifth lens element with negative refractive power has a concave image-side surface in a paraxial region thereof, wherein the image-side surface of the fifth lens element has at least one convex critical point in an off-axial region thereof, and two surfaces of the fifth lens element are both aspheric.Type: ApplicationFiled: July 11, 2017Publication date: August 23, 2018Inventors: Chun-Che HSUEH, Wei-Yu CHEN, Chun-Shan CHEN, Hsuan-Chin HUANG, Kuan-Ting YEH
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Publication number: 20180113283Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being convex in a paraxial region thereof, wherein at least one surface of the fifth lens element is aspheric. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region thereof, wherein at least one surface of the sixth lens element is aspheric, and the image-side surface of the sixth lens element has at least one inflection point thereon.Type: ApplicationFiled: December 20, 2017Publication date: April 26, 2018Inventors: Chun-Shan CHEN, Tsung-Han TSAI, Ming-Ta CHOU
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Patent number: 9915808Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being convex in a paraxial region thereof, wherein at least one surface of the fifth lens element is aspheric. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region thereof, wherein at least one surface of the sixth lens element is aspheric, and the image-side surface of the sixth lens element has at least one inflection point thereon.Type: GrantFiled: December 13, 2016Date of Patent: March 13, 2018Assignee: LARGAN PRECISION CO., LTD.Inventors: Chun-Shan Chen, Tsung-Han Tsai, Ming-Ta Chou
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Publication number: 20180067285Abstract: An optical imaging system includes, in order from an object side to an image side, a first lens element with positive refractive power, a second lens element, a third lens element, a fourth lens element, and a fifth lens element. Each of the fourth lens element and the fifth lens element includes at least one aspheric surface. The fourth lens element and the fifth lens element are made of plastic. The fifth lens element includes a concave image-side surface and at least one inflection point. An axial distance is formed between each of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element, and the optical imaging system further comprises a stop.Type: ApplicationFiled: October 24, 2017Publication date: March 8, 2018Applicant: LARGAN PRECISION CO.,LTD.Inventors: Chun-Shan CHEN, Tsung-Han TSAI, Hsin-Hsuan HUANG
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Patent number: 9897783Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being convex in a paraxial region thereof, wherein at least one surface of the fifth lens element is aspheric. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region thereof, wherein at least one surface of the sixth lens element is aspheric, and the image-side surface of the sixth lens element has at least one inflection point thereon.Type: GrantFiled: December 13, 2016Date of Patent: February 20, 2018Assignee: LARGAN PRECISION CO., LTD.Inventors: Chun-Shan Chen, Tsung-Han Tsai, Ming-Ta Chou
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Publication number: 20180031809Abstract: An imaging lens system comprises, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with refractive power; a third lens element with refractive power having object-side and image-side surfaces being aspheric, at least one surface thereof having at least one inflection point; a fourth lens element with refractive power having a concave object-side surface and a convex image-side surface; a fifth lens element with refractive power having an aspheric object-side surface and an aspheric concave image-side surface, the image-side surface thereof having at least one inflection point.Type: ApplicationFiled: September 29, 2017Publication date: February 1, 2018Inventor: CHUN-SHAN CHEN
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Publication number: 20180024327Abstract: An imaging lens system comprises, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with refractive power; a third lens element with refractive power having object-side and image-side surfaces being aspheric, at least one surface thereof having at least one inflection point; a fourth lens element with refractive power having a concave object-side surface and a convex image-side surface; a fifth lens element with refractive power having an aspheric object-side surface and an aspheric concave image-side surface, the image-side surface thereof having at least one inflection point.Type: ApplicationFiled: September 29, 2017Publication date: January 25, 2018Inventor: CHUN-SHAN CHEN
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Publication number: 20170363844Abstract: An optical imaging system includes, in order from an object side to an image side, a first lens element with positive refractive power, a second lens element, a third lens element, a fourth lens element, and a fifth lens element. Each of the fourth lens element and the fifth lens element includes at least one aspheric surface. The fourth lens element and the fifth lens element are made of plastic. The fifth lens element includes a concave image-side surface and at least one inflection point. An axial distance is formed between each of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element, and the optical imaging system further comprises a stop.Type: ApplicationFiled: August 31, 2017Publication date: December 21, 2017Applicant: LARGAN PRECISION CO.,LTD.Inventors: Chun-Shan CHEN, Tsung-Han TSAI, Hsin-Hsuan HUANG
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Patent number: 9810881Abstract: An imaging lens system comprises, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with refractive power; a third lens element with refractive power having object-side and image-side surfaces being aspheric, at least one surface thereof having at least one inflection point; a fourth lens element with refractive power having a concave object-side surface and a convex image-side surface; a fifth lens element with refractive power having an aspheric object-side surface and an aspheric concave image-side surface, the image-side surface thereof having at least one inflection point.Type: GrantFiled: March 11, 2016Date of Patent: November 7, 2017Assignee: LARGAN PRECISION CO., LTD.Inventor: Chun-Shan Chen
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Patent number: 9784948Abstract: An imaging lens system comprises, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with refractive power; a third lens element with refractive power having object-side and image-side surfaces being aspheric, at least one surface thereof having at least one inflection point; a fourth lens element with refractive power having a concave object-side surface and a convex image-side surface; a fifth lens element with refractive power having an aspheric object-side surface and an aspheric concave image-side surface, the image-side surface thereof having at least one inflection point.Type: GrantFiled: March 11, 2016Date of Patent: October 10, 2017Assignee: LARGAN PRECISION CO., LTD.Inventor: Chun-Shan Chen
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Patent number: 9726860Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being convex in a paraxial region thereof, wherein at least one surface of the fifth lens element is aspheric. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region thereof, wherein at least one surface of the sixth lens element is aspheric, and the image-side surface of the sixth lens element has at least one inflection point thereon.Type: GrantFiled: August 28, 2015Date of Patent: August 8, 2017Assignee: LARGAN PRECISION CO., LTD.Inventors: Chun-Shan Chen, Tsung-Han Tsai, Ming-Ta Chou
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Publication number: 20170192208Abstract: An optical imaging system includes, in order from an object side to an image side, a first lens element with positive refractive power, a second lens element, a third lens element, a fourth lens element, and a fifth lens element. Each of the fourth lens element and the fifth lens element includes at least one aspheric surface. The fourth lens element and the fifth lens element are made of plastic. The fifth lens element includes a concave image-side surface and at least one inflection point. An axial distance is formed between each of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element, and the optical imaging system further comprises a stop.Type: ApplicationFiled: March 23, 2017Publication date: July 6, 2017Applicant: LARGAN PRECISION CO.,LTD.Inventors: Chun-Shan CHEN, Tsung-Han TSAI, Hsin-Hsuan HUANG
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Patent number: 9645356Abstract: An optical imaging system includes, in order from an object side to an image side, a first lens element with positive refractive power, a second lens element, a third lens element, a fourth lens element, and a fifth lens element. Each of the fourth lens element and the fifth lens element includes at least one aspheric surface. The fourth lens element and the fifth lens element are made of plastic. The fifth lens element includes a concave image-side surface and at least one inflection point. An axial distance is formed between each of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element, and the optical imaging system further comprises a stop.Type: GrantFiled: June 22, 2015Date of Patent: May 9, 2017Assignee: LARGAN PRECISION CO., LTD.Inventors: Chun-Shan Chen, Tsung-Han Tsai, Hsin-Hsuan Huang
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Publication number: 20170090161Abstract: An optical image lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has positive refractive power. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has refractive power. The fifth lens element with refractive power has an image-side surface being convex in a paraxial region thereof, wherein at least one surface of the fifth lens element is aspheric. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region thereof, wherein at least one surface of the sixth lens element is aspheric, and the image-side surface of the sixth lens element has at least one inflection point thereon.Type: ApplicationFiled: December 13, 2016Publication date: March 30, 2017Inventors: Chun-Shan CHEN, Tsung-Han TSAI, Ming-Ta CHOU