Patents Assigned to Largan Precision Co.
  • Patent number: 12339425
    Abstract: A photographing optical lens system includes seven lens elements, the seven lens elements being, 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, a sixth lens element, and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one lens surface of the seven lens elements has at least one inflection point thereon.
    Type: Grant
    Filed: March 12, 2024
    Date of Patent: June 24, 2025
    Assignee: Largan Precision Co., Ltd.
    Inventor: Hsin-Hsuan Huang
  • Patent number: 10690886
    Abstract: An imaging lens assembly 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, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The seventh lens element has an image-side surface being concave in a paraxial region thereof. The image-side surface of the seventh lens element has at least one convex shape in an off-axis region thereof. An object-side surface and the image-side surface of the seventh lens element are aspheric. At least one of an image-side surface of the fourth lens element and an image-side surface of the fifth lens element has at least one inflection point.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: June 23, 2020
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Hsiang-Chi Tang, Cheng-Chen Lin, Chun-Yen Chen, Yu-Tai Tseng, Wei-Yu Chen
  • Patent number: 10649179
    Abstract: A photographing lens assembly includes, in order from an object side to an image side: a first, a second, a third, a fourth, a fifth and a sixth lens elements. The first lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, wherein the object-side surface has at least one convex critical point in an off-axis region thereof. The third lens element has an image-side surface being convex in a paraxial region thereof. The fourth lens element has positive refractive power. The fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof, and an image-side surface being convex in a paraxial region thereof. The sixth lens element has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface has at least one convex critical point in an off-axis region thereof.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: May 12, 2020
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Po-Lun Hsu, Wei-Yu Chen, Kuan-Ting Yeh, Ssu-Hsin Liu
  • Patent number: 10585262
    Abstract: An optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element and a third lens element. The first lens element with positive refractive power has an object-side surface being convex, and the object-side surface and an image-side surface thereof are aspheric. The second lens element with negative refractive power has an image-side surface being concave, and an object-side surface and the image-side surface thereof are aspheric. The third lens element with refractive power has an object-side surface being concave, and the object-side surface and an image-side surface thereof are aspheric. The optical lens assembly further includes a stop with no lens element having refractive power disposed between the stop and the first lens element. The optical lens assembly has a total of three lens elements with refractive power.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: March 10, 2020
    Assignee: Largan Precision Co., Ltd.
    Inventors: Chun-Che Hsueh, Hsin-Hsuan Huang
  • Patent number: 10545315
    Abstract: An optical imaging lens system includes five lens elements which are, 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 has positive refractive power. The second lens element has negative refractive power. The third lens element has positive refractive power. The fourth lens element has negative refractive power. The fifth lens element with negative refractive power can have an object-side surface being concave in a paraxial region thereof.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: January 28, 2020
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Hung-Shuo Chen, Shu-Yun Yang
  • Patent number: 10527821
    Abstract: An imaging optical lens assembly 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 and a fifth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region. The second lens element with negative refractive power has an object-side surface being concave in a paraxial region. The third lens element has an object-side surface and an image-side surface being aspheric. The fourth lens element with negative refractive power has an object-side surface being concave and an image-side surface being concave in a paraxial region, wherein the image-side surface has convex shape in an off-axis region, and the two surfaces thereof are aspheric. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being both aspheric.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: January 7, 2020
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Po-Lun Hsu, Wei-Yu Chen
  • Patent number: 10520705
    Abstract: An imaging lens system includes six lens elements, which are, 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 sixth lens element has an image-side surface being concave in a paraxial region thereof. The image-side surface of the sixth lens element has at least one inflection point.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: December 31, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Hsiang-Chi Tang, Cheng-Chen Lin, Chun-Yen Chen, Hsin-Hsuan Huang
  • Patent number: 10509202
    Abstract: An optical imaging lens system includes six lens elements which are, 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 negative refractive power. The fourth lens element has an image-side surface being convex in a paraxial region thereof. The fifth lens element has positive refractive power. The sixth lens element has an object-side surface being convex in a paraxial region thereof.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: December 17, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Chun-Che Hsueh, Shu-Yun Yang
  • Patent number: 10444471
    Abstract: An image system lens assembly includes seven lens elements which are, 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, a sixth lens element and a seventh lens element. At least one surface among object-side surfaces and image-side surfaces of the fifth lens element, the sixth lens element and the seventh lens element has at least one critical point in an off-axis region thereof.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: October 15, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Yu-Tai Tseng, Tzu-Chieh Kuo
  • Patent number: 10437017
    Abstract: A photographing optical 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 and a fifth lens element. The first lens element has positive refractive power. The second lens element has negative refractive power. The fourth lens element with negative refractive power has an object-side surface being convex and an image-side surface being concave in a paraxial region thereof, wherein, either the object-side surface thereof, the image-side surface thereof or both the two surfaces thereof have at least one critical point in an off-axial region thereof, and either the object-side surface thereof, the image-side surface thereof or both the two surfaces thereof are aspheric.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: October 8, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Cheng-Chen Lin, Hung-Shuo Chen, Tzu-Chieh Kuo
  • Patent number: 10394002
    Abstract: A photographing optical lens assembly includes, in order from object side to image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element has positive refractive power. The second, third, fourth and fifth lens elements have refractive power. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region, wherein an object-side surface and the image-side surface of the sixth lens element are both aspheric, and the image-side surface has at least one inflection point. The seventh lens element with refractive power has an image-side surface being concave in a paraxial region, wherein an object-side surface and the image-side surface of the seventh lens element are both aspheric, and the image-side surface has at least one inflection point.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: August 27, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventor: Hsin-Hsuan Huang
  • Patent number: 10365460
    Abstract: A photographing lens assembly includes seven lens elements which are, 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, a sixth lens element and a seventh lens element. The second lens element has positive refractive power. The seventh lens element has an image-side surface being concave in a paraxial region thereof, and the image-side surface of the seventh lens element has at least one convex shape in an off-axis region thereof.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: July 30, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventor: Shu-Yun Yang
  • Patent number: 10310229
    Abstract: A photographing optical lens assembly includes six lens elements which are, 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 second lens element has positive refractive power. The third lens element has negative refractive power. The sixth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof, wherein the image-side surface of the sixth lens element has at least one inflection point.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: June 4, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventor: Hsin-Hsuan Huang
  • Patent number: 10310230
    Abstract: A photographing lens system includes five lens elements which are, 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 has positive refractive power. The third lens element has an object-side surface being convex in a paraxial region thereof. The fourth lens element has an object-side surface being convex in a paraxial region thereof.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: June 4, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Hung-Shuo Chen, Hsin-Hsuan Huang
  • Patent number: 10288845
    Abstract: An image capturing lens system includes five lens elements which are, 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. Each of the five lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power. The object-side surface of the first lens element is convex in a paraxial region thereof. The second lens element has negative refractive power. At least one surface among the object-side surfaces and the image-side surfaces of the five lens elements is aspheric. The image capturing lens system further includes an aperture stop disposed between an imaged object and the object-side surface of the second lens element.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: May 14, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Hung-Shuo Chen, Hsin-Hsuan Huang
  • Patent number: 10241295
    Abstract: A imaging lens assembly 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 negative refractive power. The second lens element has positive refractive power. The third lens element has positive refractive power. The fourth lens element has positive refractive power. The fifth lens element has positive refractive power. The sixth lens element has negative refractive power. The imaging lens assembly has a total of six lens elements.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: March 26, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Lin-Yao Liao, Hsin-Hsuan Huang
  • Patent number: 10228535
    Abstract: A photographing optical lens assembly 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 with negative refractive power has an image-side surface being concave. The second lens element has an image-side surface being concave. The fourth lens element has an image-side surface being convex. The sixth lens element has an object-side surface being concave. The photographing optical lens assembly has a total of six lens elements.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: March 12, 2019
    Assignee: Largan Precision Co., Ltd.
    Inventors: Tung-Yi Hsieh, Wei-Yu Chen
  • Patent number: 10215962
    Abstract: An optical imaging lens system includes six lens elements which are, 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 negative refractive power. The third lens element has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The fourth lens element has positive refractive power. The fifth lens element has negative refractive power. The sixth lens element has positive refractive power.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: February 26, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Ssu-Hsin Liu, Shu-Yun Yang
  • Patent number: 10209488
    Abstract: An optical imaging lens assembly 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 and a fifth lens element. The first lens element has an object-side surface being concave in a paraxial region thereof. The second lens element has positive refractive power. The third lens element has negative refractive power. The fourth lens element has positive refractive power. The fifth lens element has negative refractive power.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: February 19, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Yu-Tai Tseng, Chun-Che Hsueh, Tzu-Chieh Kuo
  • Patent number: 10197772
    Abstract: An optical photographing 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 and a fifth lens element. The second lens element has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The third lens element has positive refractive power. The fourth lens element has positive refractive power. The fifth lens element has negative refractive power. The optical photographing lens system has a total of five lens elements.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: February 5, 2019
    Assignee: LARGAN Precision Co., Ltd.
    Inventors: Chun-Yen Chen, Shu-Yun Yang