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P‐23: Design Parameters for Using Charging Technique for TFT‐LCDs
Author(s) -
Kim DoSung,
Lee WonHo,
Lee JunYeop,
Lee SangYeop,
Jung SungHun,
Yoon DongJun,
Choi ByungJin,
Song HongSung,
Oh JinWoo,
Lee GueTai,
Oh ChangHo,
Kang InByeong
Publication year - 2007
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2785278
Subject(s) - thin film transistor , pixel , liquid crystal display , capacitor , computer science , focus (optics) , electrical engineering , electronic engineering , optoelectronics , materials science , engineering , voltage , artificial intelligence , physics , optics , nanotechnology , layer (electronics)
In case of charging a large capacitor in a short time, We use a well‐known pre charging technique(1), which is a method of charging a pixel two times at an interval of one gate pulse width. But there is a side effect of a pattern looking like out of focus. This phenomenon is caused directly by a different quantity of charging being introduced into two pixels which are two pixels apart vertically with each other. To remove this side efeect, we optimize the charging design parameter; Cst+Clc, Ion condition from TFT device. with the pre charging technique, A 120Hz 32″ WXGA TFT‐LCD which has three times of Cst + Clc as compared to conventional IPS structure has been developed.