Patents by Inventor Wan-Ching Tsai

Wan-Ching Tsai 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: 10419708
    Abstract: An image processing circuit and an image contrast enhancement method of the imaging processing circuit are provided. The image processing circuit includes an index generating unit, a data compensation unit, and a data gain unit. The index generating unit receives a plurality of pixel data of a first frame to provide a plurality of local curve indices corresponding to a plurality of display areas of a display panel. The data compensation unit selects parts of a plurality of gray-level transformation curves respectively corresponding to the pixel data according to the local curve indices, so as to regulate the pixel data and then provide a plurality compensated pixel data. The data gain unit determines a data gain according to a backlight duty cycle signal and regulates the compensated pixel data according to the data gain, so as to provide a plurality of enhanced pixel data.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: September 17, 2019
    Assignee: Novatek Microelectronics Corp.
    Inventors: Wan-Ching Tsai, Chih-Chia Kuo
  • Publication number: 20180278808
    Abstract: A method of performing gamut mapping on an input image for an image output device includes receiving the input image to analyze a color distribution of the input image; determining a protect range corresponding to a first percentage of color codes of the input image and a compression range corresponding to a second percentage of the color codes of the input image based on the color distribution of the input image; and moving at least one of the color codes of the input image outside the protect range of the color codes to the compression range by a compression algorithm to perform gamut mapping on the input image.
    Type: Application
    Filed: May 30, 2018
    Publication date: September 27, 2018
    Inventors: Chia-Jung Hsu, Wan-Ching Tsai, Chao-Wei Ho, Chih-Chia Kuo
  • Patent number: 10019785
    Abstract: A method of performing luminance/brightness adjustment and gamut mapping to high dynamic range images for a display device includes receiving an input image to analyze an image distribution of the input image, generating a scene information of the input image according to the image distribution, and performing luminance/brightness adjustment and gamut mapping to the input image according to the scene information, to generate an output image corresponding to the input image, wherein the scene information is regarded as dynamic metadata of the input image.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: July 10, 2018
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Chia-Jung Hsu, Wan-Ching Tsai, Chao-Wei Ho, Chih-Chia Kuo
  • Patent number: 9986200
    Abstract: A switching method of video setting for a video conversion system includes generating a static metadata change flag when a static metadata change event is detected, repeating an output video after the static metadata change flag is generated, updating a video setting according to a static metadata corresponding to an input video when the output video is repeated, and converting the input video into the output video according to the video setting to display the output video.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: May 29, 2018
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Wan-Ching Tsai, Chih-Chia Kuo, Shih-Sung Wen, Fu-Sheng Liang
  • Publication number: 20170256039
    Abstract: A method of performing luminance/brightness adjustment and gamut mapping to high dynamic range images for a display device includes receiving an input image to analyze an image distribution of the input image, generating a scene information of the input image according to the image distribution, and performing luminance/brightness adjustment and gamut mapping to the input image according to the scene information, to generate an output image corresponding to the input image, wherein the scene information is regarded as dynamic metadata of the input image.
    Type: Application
    Filed: March 7, 2016
    Publication date: September 7, 2017
    Inventors: Chia-Jung Hsu, Wan-Ching Tsai, Chao-Wei Ho, Chih-Chia Kuo
  • Patent number: 9613409
    Abstract: An image converting method includes calculating a plurality of segment averages of pixel values in a plurality segments of an input image; acquiring the maximum among the segment averages as a first threshold; calculating a plurality of local averages of pixel values in adjacent segments of input image; acquiring the maximum among local averages as a second threshold; counting the number of pixel values exceeding first threshold in the segments as a plurality of first pixel counts and counting the number of pixel values exceeding second threshold in the segments as a plurality of second pixel counts; generating a specular map and a confidence according to the first pixel counts and the second pixel counts; mapping the input image according to the specular map, to generate an intermediate image; and blending the input image and the intermediate image according to the confidence, to generate an output image.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: April 4, 2017
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Wan-Ching Tsai, Chao-Wei Ho, Chia-Jung Hsu, Chih-Chia Kuo
  • Publication number: 20160309112
    Abstract: An image processing circuit and an image contrast enhancement method of the imaging processing circuit are provided. The image processing circuit includes an index generating unit, a data compensation unit, and a data gain unit. The index generating unit receives a plurality of pixel data of a first frame to provide a plurality of local curve indices corresponding to a plurality of display areas of a display panel. The data compensation unit selects parts of a plurality of gray-level transformation curves respectively corresponding to the pixel data according to the local curve indices, so as to regulate the pixel data and then provide a plurality compensated pixel data. The data gain unit determines a data gain according to a backlight duty cycle signal and regulates the compensated pixel data according to the data gain, so as to provide a plurality of enhanced pixel data.
    Type: Application
    Filed: April 20, 2015
    Publication date: October 20, 2016
    Inventors: Wan-Ching Tsai, Chih-Chia Kuo
  • Publication number: 20150269904
    Abstract: An image processing device and a method thereof are provided, and said device includes a valid bits detector and a compensator. The valid bits detector is configured to detect valid bits of an image input signal thereby outputting a correcting coefficient correspondingly. The compensator is coupled to the valid bits detector to receive the correcting coefficient, bit-compensating for the image input signal according to the correcting coefficient, thereby outputting an image output signal correspondingly.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 24, 2015
    Applicant: Novatek Microelectronics Corp.
    Inventor: Wan-Ching Tsai