Seok-Ha Hong
Samsung
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Publication
Featured researches published by Seok-Ha Hong.
IEEE\/OSA Journal of Display Technology | 2016
Bong-Hyun You; Soo-yeon Lee; Seok-Ha Hong; Jae-Hoon Lee; Hyun-Chang Kim; Haram Ju; Moon-Chul Choi; Deog-Kyoon Jeong
In order to suppress the malfunction caused by the shift of the threshold voltage (VTH) of oxide thin film transistors (TFTs) to a negative value, double-gate TFTs are used in the shift register of the gate driving system to control VTH by adjusting the top gate bias. The proposed circuit detects the current consumption of the shift register and adjusts VTH so that the current consumption of the shift register is regulated within the desired value. The system includes a compensation algorithm, which can search for an optimized top gate bias in various circumstances such as process fluctuations and ambient temperature change. The proposed system provides a stable operation compared with a conventional structure especially at high temperature. Experimental results show that, in the conventional system without compensation, the output voltage of the shift register deteriorates at 80°C and above, and the power consumption increases from 1.15 to 2.14 mW after 21600 s of continuous operation at 60°C. On the other hand, the proposed system provides a stable gate output up to 100°C and keeps the power consumption below 1.10 mW by adjusting the top gate bias responding to environment changes.
Archive | 2015
Dong-won Park; Joon-Chul Goh; Seok-Ha Hong
Archive | 2014
Hyun-Sik Hwang; Dae-Gwang Jang; Byung-Sun Kim; Sang-Mi Kim; Ji-Myoung Seo; Seok-Ha Hong
Archive | 2013
Dong-won Park; Bong-Hyun You; Jae-sung Bae; Dong-Gyu Lee; Seok-Ha Hong
Archive | 2016
Seokyun Son; Kuk-Hwan Ahn; Bong-Hyun You; Jai-Hyun Koh; Sungjae Park; Dong-won Park; Ik-soo Lee; Seok-Ha Hong
Electronics Letters | 2017
Bong-Hyun You; Jae-Hoon Lee; Soo-yeon Lee; Seok-Ha Hong; Hyun-Chang Kim; Haram Ju; Moon-Chul Choi; Deog-Kyoon Jeong
SID Symposium Digest of Technical Papers | 2016
Bong-Hyun You; Jae-Hoon Lee; Seok-Ha Hong; Dong-won Park; Hyun-Chang Kim; Deog-Kyoon Jeong
Archive | 2016
Jung-taek Kim; Young-Soo Yoon; Eun-ho Lee; Jiwoong Jeong; Seok-Ha Hong
Archive | 2012
Dong-won Park; Bong-Hyun You; Jae-sung Bae; Dong-Gyu Lee; Seok-Ha Hong
Archive | 2012
Hyun-Sik Hwang; Dae-Gwang Jang; Byung-Sun Kim; Sang-Mi Kim; Ji-Myoung Seo; Seok-Ha Hong