Patents by Inventor Yu-Huai Chen

Yu-Huai 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).

  • Patent number: 11988847
    Abstract: An optical element driving mechanism is provided. The optical element driving mechanism includes a fixed portion, a first movable portion, a second movable portion, a first driving assembly, and a second driving assembly. The first movable portion is movable relative to the fixed portion. The second movable portion is used for holding an optical element having a main axis, and is movable relative to the first movable portion. The first driving assembly is used for driving the first movable portion to move in a first dimension relative to the fixed portion, and the second driving assembly is used for driving the second movable portion to move in a second dimension relative to the fixed portion. The first dimension and the second dimension are different.
    Type: Grant
    Filed: July 26, 2021
    Date of Patent: May 21, 2024
    Assignee: TDK TAIWAN CORP.
    Inventors: Yun-Fei Wang, Yu-Huai Liao, Sheng-Zong Chen, Wei-Han Hsia, Kun-Shih Lin
  • Patent number: 11902658
    Abstract: Systems, apparatuses, and methods for implementing an instant auto-focus mechanism with distance estimation are disclosed. A camera includes at least an image sensor, one or more movement and/or orientation sensors, a timer, a lens, and control circuit. The control circuit receives first and second images captured by the image sensor of a given scene. The control circuit calculates a distance between first and second camera locations when the first and second images, respectively, were captured based on the one or more movement and/or orientation sensors and the timer. Next, the control circuit calculates an estimate of a second distance between the camera and an object in the scene based on the distance between camera locations and angles between the camera and the object from the first and second locations. Then, the control circuit causes the lens to be adjusted to bring the object into focus for subsequent images.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: February 13, 2024
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Po-Min Wang, Yu-Huai Chen
  • Publication number: 20240003748
    Abstract: Techniques for performing phase detect operations are described. The techniques include obtaining first measurements with a set of half-shield phase-detect sensors; obtaining second measurements with a set of non-phase detect sensors that are not configured as phase-detect sensor; and determining a phase difference based on the first measurements and the second measurements.
    Type: Application
    Filed: June 29, 2022
    Publication date: January 4, 2024
    Applicant: Advanced Micro Devices, Inc.
    Inventors: Wei-Chih Hung, Po-Min Wang, Yu-Huai Chen
  • Publication number: 20240003680
    Abstract: Techniques for generating a depth map are described. The techniques include obtaining a set of phase difference measurements with a phase detect sensor, and generating a depth map based on the set of phase difference measurements, utilizing a first set of calibration data correlating phase difference measurements with lens defocus data and a second set of calibration data correlating lens positions with object distances.
    Type: Application
    Filed: June 30, 2022
    Publication date: January 4, 2024
    Applicant: Advanced Micro Devices, Inc.
    Inventors: Wei-Chih Hung, Po-Min Wang, Yu-Huai Chen
  • Publication number: 20230319429
    Abstract: Systems, apparatuses, and methods for estimating object distance with camera lens focus calibration are disclosed. A relationship between in-focus lens position and object distance is captured in a calibration phase for a plurality of object distances and lens positions for a given camera. The in-focus lens positions and corresponding object distances are stored as calibration data in a memory device of the given camera. Next, during operation of the given camera, a control circuit receives the in-focus lens position that was used to capture a given image. Then, the control circuit performs a lookup of the calibration data with the in-focus lens position to retrieve a corresponding object distance. Next, the corresponding object distance is used as an estimate of a distance to an object in the scene captured in the given image by the given camera.
    Type: Application
    Filed: March 31, 2022
    Publication date: October 5, 2023
    Inventors: Po-Min Wang, Yu-Huai Chen, Wei-Chih Hung
  • Patent number: 11616901
    Abstract: An apparatus and method for efficiently determining a final camera lens position that captures a focused input image are described. An image signal processing system of a camera capable of performing automatic focus includes a camera lens, an image sensor, a focus engine, and a lens controller. Rather than generate a single contrast value based on digital signals corresponding to a single image, the focus engine uses at least two value generators to generate multiple contrast values. The value generators are bandpass filters with different bandwidths from one another. The focus engine uses the multiple contrast values, rather than from a single contrast value, to determine a search direction for finding a final lens position of the camera lens, when to use relatively large or coarse step sizes for updating the lens position, and when to use relatively small or fine step sizes for updating the lens position.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: March 28, 2023
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Yu-Huai Chen, Po-Min Wang
  • Publication number: 20220311945
    Abstract: An apparatus and method for efficiently determining a final camera lens position that captures a focused input image are described. An image signal processing system of a camera capable of performing automatic focus includes a camera lens, an image sensor, a focus engine, and a lens controller. Rather than generate a single contrast value based on digital signals corresponding to a single image, the focus engine uses at least two value generators to generate multiple contrast values. The value generators are bandpass filters with different bandwidths from one another. The focus engine uses the multiple contrast values, rather than from a single contrast value, to determine a search direction for finding a final lens position of the camera lens, when to use relatively large or coarse step sizes for updating the lens position, and when to use relatively small or fine step sizes for updating the lens position.
    Type: Application
    Filed: March 29, 2021
    Publication date: September 29, 2022
    Inventors: Yu-Huai Chen, Po-Min Wang
  • Publication number: 20220070357
    Abstract: Systems, apparatuses, and methods for implementing an instant auto-focus mechanism with distance estimation are disclosed. A camera includes at least an image sensor, one or more movement and/or orientation sensors, a timer, a lens, and control circuit. The control circuit receives first and second images captured by the image sensor of a given scene. The control circuit calculates a distance between first and second camera locations when the first and second images, respectively, were captured based on the one or more movement and/or orientation sensors and the timer. Next, the control circuit calculates an estimate of a second distance between the camera and an object in the scene based on the distance between camera locations and angles between the camera and the object from the first and second locations. Then, the control circuit causes the lens to be adjusted to bring the object into focus for subsequent images.
    Type: Application
    Filed: August 31, 2020
    Publication date: March 3, 2022
    Inventors: Po-Min Wang, Yu-Huai Chen