A CMOS Current-Mode S-Shape Correction Circuit with Shape-Adjustable Control

Kuo-Jen LIN  Chih-Jen CHENG  Hsin-Cheng SU  Jwu-E CHEN  

IEICE TRANSACTIONS on Electronics   Vol.E95-C   No.11   pp.1730-1736
Publication Date: 2012/11/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E95.C.1730
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Electronic Displays)
TFT-LCD,  S-shape correction,  current-mode circuit,  quadratic circuit,  

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A CMOS current-mode S-shape correction circuit with shape-adjustable control is proposed for suiting different LCD panel's characteristics from different manufactures. The correction shape is divided into three segments for easy curve-fitting using three lower order polynomials. Each segment could be realized by a corresponding current-mode circuit. The proposed circuit consists of several control points which are designed for tuning the correction shape. The S-shape correction circuit was fabricated using the 0.35 µm TSMC CMOS technology. The measured input dynamic range of the circuit is from 0 µA to 220 µA. The -3 dB bandwidth of the circuit is up to 262 MHz in a high input current region.