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Dive into the research topics where Jong-Woong Chang is active.

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Featured researches published by Jong-Woong Chang.


international conference on solid state sensors actuators and microsystems | 2009

Novel voltage controlled spatial modulation method for digital microshutter display with high performance

Kilsung Lee; Dong-Hyun Kim; Jong-Woong Chang; Jun-Bo Yoon

In this work, we have proposed a novel voltage controlled spatial modulation method for a digital microshutter display. A single pixel is composed of multiple sub-microshutters with the same characteristics. And the grayscale level of it is modulated by the number of actuated sub-microshutters controlled by applied voltage distribution in floating counter electrodes and hysteresis phenomenon in electrostatic microshutters. Through the proposed modulation method, the microshutter having low operation voltage under 20V together with large deflection of quarter circle shape has been demonstrated.


49th Annual SID Symposium, Seminar, and Exhibition 2011, Display Week 2011 | 2011

P‐56: Design of Gate Integrated Circuit Using IGZO Thin Film Transistors for TFT‐LCD Panel

Sangjin Jeon; Gwang-Bum Ko; Jong-Woong Chang; Samjin Hwang; Jae Min Myoung

This thesis deals with the method to improve the gate driver stability of large sized IGZO TFT panel. The proposed Gate driver circuit was designed for 26-inch HD LCD Panel and the circuit has been designed considering the electrical characteristic of instability under the bias stress and temperature This circuit consists of twenty TFT using two clock signals such as CK1,CK2 (Von) and 1 power signals such as VSS (Voff), and new circuit with double inverter suppress the ripple occurrence for every time except actuating time that the signal of the gate line is revealed. By applying the proposed new circuit, the H-SPICE simulation was performed. TFT in integrated circuit can be stable in the low frequency drive (48 Hz) althought ΔVth was 29 V and It could be applicable to the threshold frequency of 86 Hz in the high frequency operation without a problem.


Archive | 2006

Driving unit and display apparatus having the same

Sung-man Kim; Seong-Young Lee; Yeon-Kyu Moon; Yun-Hee Kwak; Jong-Woong Chang


Archive | 2001

Liquid crystal display having repair lines and methods of repairing the same

Dong-Gyu Kim; Woon-Yong Park; Jong-Woong Chang


Archive | 2007

Liquid crystal display and method of repairing the same

Jong-Woong Chang


Archive | 2004

Display device, display panel therefor, and inspection method thereof

Jong-Woong Chang; Dong-Gyu Kim


Archive | 1998

IPS-LCD having a third electrode having aperture and formed on counter substrate

Jin-Tae Yuh; Kye-Hun Lee; Byoung-Sun Na; Dong-Gyu Kim; Jong-Woong Chang; Jung-Uk Shim; Jang-kun Song; Hyun-Sik Lee


Archive | 2007

LIQUID CRYSTAL DISPLAY HAVING A MODIFIED ELECTRODE ARRAY

Jin-Tae Yuh; Kye-Hun Lee; Byoung-Sun Na; Dong-Gyu Kim; Jong-Woong Chang; Jung-Uk Shim; Jang-Kun Song; Hyun-Sik Lee


Archive | 2015

Liquid crystal display device and method of repairing bad pixels therein

Jong-Woong Chang; Shin-Tack Kang


Archive | 1997

Liquid crystal display having repair lines that cross data lines twice and cross gate lines in the active area and related repairing methods

Dong-Gyu Kim; Woon-Yong Park; Jong-Woong Chang

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