Patents by Inventor Hyeong-un Park

Hyeong-un Park 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).

  • Auto-focus regulating method for video cameras and device thereof
    Patent number: 5477271
    Abstract: An auto-focus regulating method for a video camera includes the steps of: obtaining slopes between adjacent pixels contained in a sampling area constituting at least part of a frame screen; integrating all slopes of the sampling area: calculating the difference of the integrated values between the previous and following frame screens; and performing a focus control so that the integrated values in the following frame screens are increased by the difference of the integrated values. The auto-focus regulating method for video cameras has an advantage that various focus modes can be provided compared with the conventional method by which the focus is regulated by the sum of envelopes.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: December 19, 1995
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hyeong-un Park