Patents by Inventor Ssu-Hsin LIU

Ssu-Hsin LIU 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: 20220244504
    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: Application
    Filed: April 14, 2022
    Publication date: August 4, 2022
    Applicant: LARGAN PRECISION CO., LTD.
    Inventors: Po-Lun HSU, Wei-Yu CHEN, Kuan-Ting YEH, Ssu-Hsin LIU
  • Patent number: 11333862
    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: April 2, 2020
    Date of Patent: May 17, 2022
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Po-Lun Hsu, Wei-Yu Chen, Kuan-Ting Yeh, Ssu-Hsin Liu
  • Publication number: 20220035131
    Abstract: An image lens assembly includes five lens elements which are, in order from an object side to an image side along an optical path: 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 with positive refractive power has an image-side surface being convex in a paraxial region thereof. The fourth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and having at least one concave critical point in an off-axis region thereof. The fifth lens element has an image-side surface being concave in a paraxial region thereof and having at least one convex critical point in an off-axis region thereof.
    Type: Application
    Filed: September 14, 2020
    Publication date: February 3, 2022
    Applicant: LARGAN PRECISION CO., LTD.
    Inventors: Yu-Chun KE, Jin Sen WANG, Ssu-Hsin LIU, Wei-Yu CHEN
  • Patent number: 10935770
    Abstract: The present disclosure provides an optical photographing lens system comprising four lens elements, the four lens elements being, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element; a third lens element; and a fourth lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the fourth lens element having at least one convex critical point in an off-axial region thereof, both the object-side and the image-side surfaces thereof being aspheric.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: March 2, 2021
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Ssu-Hsin Liu, Tzu-Chieh Kuo
  • Publication number: 20200278515
    Abstract: The present disclosure provides an optical photographing lens system comprising four lens elements, the four lens elements being, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element; a third lens element; and a fourth lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the fourth lens element having at least one convex critical point in an off-axial region thereof, both the object-side and the image-side surfaces thereof being aspheric.
    Type: Application
    Filed: May 20, 2020
    Publication date: September 3, 2020
    Inventors: Ssu-Hsin LIU, Tzu-Chieh KUO
  • Publication number: 20200233183
    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: Application
    Filed: April 2, 2020
    Publication date: July 23, 2020
    Applicant: LARGAN PRECISION CO., LTD.
    Inventors: Po-Lun HSU, Wei-Yu CHEN, Kuan-Ting YEH, Ssu-Hsin LIU
  • Patent number: 10698186
    Abstract: The present disclosure provides an optical photographing lens system comprising four lens elements, the four lens elements being, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element; a third lens element; and a fourth lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the fourth lens element having at least one convex critical point in an off-axial region thereof, both the object-side and the image-side surfaces thereof being aspheric.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: June 30, 2020
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Ssu-Hsin Liu, Tzu-Chieh Kuo
  • 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
  • Publication number: 20190235211
    Abstract: The present disclosure provides an optical photographing lens system comprising four lens elements, the four lens elements being, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element; a third lens element; and a fourth lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the fourth lens element having at least one convex critical point in an off-axial region thereof, both the object-side and the image-side surfaces thereof being aspheric.
    Type: Application
    Filed: April 5, 2019
    Publication date: August 1, 2019
    Inventors: Ssu-Hsin LIU, Tzu-Chieh KUO
  • Patent number: 10302916
    Abstract: The present disclosure provides an optical photographing lens system comprising four lens elements, the four lens elements being, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element; a third lens element; and a fourth lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the fourth lens element having at least one convex critical point in an off-axial region thereof, both the object-side and the image-side surfaces thereof being aspheric.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: May 28, 2019
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Ssu-Hsin Liu, Tzu-Chieh Kuo
  • 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
  • Publication number: 20180299649
    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: Application
    Filed: October 27, 2017
    Publication date: October 18, 2018
    Inventors: Po-Lun HSU, Wei-Yu CHEN, Kuan-Ting YEH, Ssu-Hsin LIU
  • Publication number: 20180210177
    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: Application
    Filed: May 17, 2017
    Publication date: July 26, 2018
    Inventors: Ssu-Hsin LIU, Shu-Yun YANG
  • Publication number: 20180172952
    Abstract: The present disclosure provides an optical photographing lens system comprising four lens elements, the four lens elements being, in order from an object side to an image side: a first lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a second lens element; a third lens element; and a fourth lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the fourth lens element having at least one convex critical point in an off-axial region thereof, both the object-side and the image-side surfaces thereof being aspheric.
    Type: Application
    Filed: May 8, 2017
    Publication date: June 21, 2018
    Inventors: Ssu-Hsin LIU, Tzu-Chieh KUO