Patents by Inventor Cheng-Chih Chu

Cheng-Chih Chu 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: 8564212
    Abstract: Method for managing power of a display and apparatus thereof are provided. The proposed method includes the following steps: calculating a most appropriating voltage value and a most appropriating current value form a plurality of LEDs; and obtaining a first optimal working point according to the most appropriating voltage value and the most appropriating current value, wherein the first optimal working point is used for arranging the plurality of LEDs.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: October 22, 2013
    Assignee: Chung Yuan Christian University
    Inventors: Guan-Chyun Hsieh, Cheng-Chih Chu
  • Publication number: 20130016496
    Abstract: Method for managing power of a display and apparatus thereof are provided. The proposed method includes the following steps: calculating a most appropriating voltage value and a most appropriating current value form a plurality of LEDs; and obtaining a first optimal working point according to the most appropriating voltage value and the most appropriating current value, wherein the first optimal working point is used for arranging the plurality of LEDs.
    Type: Application
    Filed: July 11, 2011
    Publication date: January 17, 2013
    Applicant: Chung-Yuan Christian University
    Inventors: Guan-Chyun Hsieh, Cheng-Chih Chu
  • Publication number: 20100118460
    Abstract: A direct current (DC) drive includes a voltage input unit, a comparing unit, a latch unit and a voltage output unit. The voltage input unit has at least one input terminal and at least one output terminal provides a DC voltage. The comparing unit receives the DC voltage and generates a comparison control signal according to a comparison result obtained by comparing a voltage of a positive voltage terminal with a voltage of a negative voltage terminal. The latch unit is connected to the comparing unit and the voltage input unit. The voltage output unit connected to the latch unit receives the DC voltage from the voltage input unit. The latch unit selectively provides the DC voltage to the voltage output unit according to the comparison control signal.
    Type: Application
    Filed: November 10, 2008
    Publication date: May 13, 2010
    Inventors: Jian-Shen Li, Cheng-Chih Chu, Chun-Liang Lin
  • Patent number: 5844398
    Abstract: An automatic charging system for charging nickel-metal-hydride batteries is presented. The battery charging system uses a method of detecting the lowest charge current to control its charging process. The system has a constant voltage power supply including a short-circuit protection device, a battery voltage detector, a current detector, a current to voltage converter, a voltage amplifier, an analog to digital converter, a single chip microcomputer, a capacity indicator, a time indicator and a full-charge indicator. The system uses a constant voltage to charge batteries with a floating current according to the quantity of the active ions in the batteries. The battery charge current is converted to a voltage signal which is then amplified and digitized. The microcomputer detects the digitized signal to estimate the magnitude of the charge current.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: December 1, 1998
    Inventors: Hing-Hin Kwan, Yao-Ching Chen, Cheng-Chih Chu, Shu-Chin Chen, Chun-Sheng Wang