A Gray-Level Dependent Pre-Emphasis Column Driver With Fast Settling for Active-Matrix LCD Applications

In this brief, simple analytical solutions for pre-emphasis driving conditions in active-matrix liquid crystal display (AMLCD) applications are presented. According to the solutions presented, the column driver with a gray-level dependent pre-emphasis (GLDP) function is designed for fast settling. T...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2007-12, Vol.54 (12), p.1057-1061
Main Authors: Son, Young-Suk, Son, Hong-Hee, Kim, Yong-Suk, Oh, Hyeong-Seog, Cho, Gyu-Hyeong
Format: Article
Language:English
Subjects:
Active matrix liquid crystal displays
Active matrix technology
Active-matrix liquid crystal display (AMLCD)
CMOS
CMOS process
column driver
Columns (process)
Costs
data driver
Delay
Driver circuits
Drivers
Driving conditions
Energy consumption
Fabrication
fast settling
Liquid crystal displays
overdrive
pre-emphasis
Reduction
Settling
Voltage
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Summary:In this brief, simple analytical solutions for pre-emphasis driving conditions in active-matrix liquid crystal display (AMLCD) applications are presented. According to the solutions presented, the column driver with a gray-level dependent pre-emphasis (GLDP) function is designed for fast settling. The GLDP column driver is implemented without using additional frame memory. Also, modifications to the display system and integrated circuit fabrication process changes are not required. The GLDP column driver provides output voltage signals with variable pre-emphasis durations according to the magnitude of the gray-level shift to be driven. By applying the GLDP column driver, 8-mus reduction of the required one row line time was achieved on average. This one row line time reduction makes it possible to realize high performance and low cost AMLCDs. The 640 channel, full function GLDP column driver is fabricated by a 13.5-V 0.35-mum CMOS process.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2007.905362