Jong-Woong Chang
Samsung
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Publication
Featured researches published by Jong-Woong Chang.
international conference on solid state sensors actuators and microsystems | 2009
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
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
Sung-man Kim; Seong-Young Lee; Yeon-Kyu Moon; Yun-Hee Kwak; Jong-Woong Chang
Archive | 2001
Dong-Gyu Kim; Woon-Yong Park; Jong-Woong Chang
Archive | 2007
Jong-Woong Chang
Archive | 2004
Jong-Woong Chang; Dong-Gyu Kim
Archive | 1998
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
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
Jong-Woong Chang; Shin-Tack Kang
Archive | 1997
Dong-Gyu Kim; Woon-Yong Park; Jong-Woong Chang