Patents by Inventor Kwang Il Koo

Kwang Il Koo 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).

  • Print head driving apparatus and printing apparatus having the same
    Patent number: 10850503
    Abstract: Disclosed is a print head driving apparatus including: a print head unit having a plurality of heater resistors arranged therein, the plurality of heater resistors being divided into sub groups; a counter configured to sequentially generate code signals corresponding to the sub groups, using a driving clock signal; a driving signal generation unit configured to generate a driving signal for the heater resistors included in each of the sub groups, using the code signal; and a head control unit configured to extract heater resistors to which the driving signal is inputted, among heater resistors corresponding to input image data, and drive the extracted heater resistors.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: December 1, 2020
    Assignee: WOOSIM SYSTEM INC.
    Inventors: Il Bok Lee, Kwang Il Koo, Jae Kwang Lee
  • PRINT HEAD DRIVING APPARATUS AND PRINTING APPARATUS HAVING THE SAME
    Publication number: 20190351675
    Abstract: Disclosed is a print head driving apparatus including: a print head unit having a plurality of heater resistors arranged therein, the plurality of heater resistors being divided into sub groups; a counter configured to sequentially generate code signals corresponding to the sub groups, using a driving clock signal; a driving signal generation unit configured to generate a driving signal for the heater resistors included in each of the sub groups, using the code signal; and a head control unit configured to extract heater resistors to which the driving signal is inputted, among heater resistors corresponding to input image data, and drive the extracted heater resistors.
    Type: Application
    Filed: March 15, 2019
    Publication date: November 21, 2019
    Applicant: WOOSIM SYSTEM INC.
    Inventors: IL BOK LEE, Kwang Il Koo, Jae Kwang Lee