Patents by Inventor Cheng-Chuan Tsai

Cheng-Chuan 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).

  • Method for creating gamma look-up table and display device
    Patent number: 8648885
    Abstract: A method for creating a Gamma look-up table (LUT) includes: calculating interpolated display characteristics of a plurality of colors by using a nonlinear interpolation algorithm based on a plurality of display characteristics of the predetermined patterns wherein the number of the display characteristics is smaller than the product of the number of the colors and the number of the interpolated display characteristics of the colors; and correcting the interpolated display characteristics of the colors on the basis of a maximum display characteristic value and a reference gamma value so that the Gamma look-up table is created. The predetermined patterns comprise a plurality of gray level patterns which one-by-one correspond to a plurality of levels, and the interval of a pair of adjacent gray level patterns among the gray level patterns is different from the interval of another pair of adjacent gray level patterns among the gray level patterns.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: February 11, 2014
    Assignee: Realtek Semiconductor Corp.
    Inventors: Yu-Chung Lee, Cheng-Chuan Tsai, Pei-Chen Huang
  • BATTERY CHARGING CONTROL DEVICE AND METHOD OF IMPLEMENTING THE SAME
    Publication number: 20130038297
    Abstract: The invention discloses a charging control method for adjusting a charging current of a charging device, including monitoring a working voltage of the charging device, wherein the working voltage includes a voltage difference between a charging voltage and a battery voltage; adjusting the charging current of the charging device dynamically according to the working voltage of the charging device to maintain a working power of the charging device within a predetermined power range.
    Type: Application
    Filed: August 10, 2012
    Publication date: February 14, 2013
    Applicant: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Zhao SANG, Zheng LI, Chih-Yuan HSU, Chi-Ming LEE, Cheng-Chuan TSAI, Shieh-Chen WANG
  • METHOD FOR CREATING GAMMA LOOK-UP TABLE AND DISPLAY DEVICE
    Publication number: 20100225663
    Abstract: A method for creating a Gamma look-up table (LUT) includes: calculating interpolated display characteristics of a plurality of colors by using a nonlinear interpolation algorithm based on a plurality of display characteristics of the predetermined patterns wherein the number of the display characteristics is smaller than the product of the number of the colors and the number of the interpolated display characteristics of the colors; and correcting the interpolated display characteristics of the colors on the basis of a maximum display characteristic value and a reference gamma value so that the Gamma look-up table is created. The predetermined patterns comprise a plurality of gray level patterns which one-by-one correspond to a plurality of levels, and the interval of a pair of adjacent gray level patterns among the gray level patterns is different from the interval of another pair of adjacent gray level patterns among the gray level patterns.
    Type: Application
    Filed: February 11, 2010
    Publication date: September 9, 2010
    Inventors: Yu-Chung LEE, Cheng-Chuan Tsai, Pei-Chen Huang