Abstract
This study proposes two types of area-efficient fully resistor
digital-to-analog converter (R-DAC)-based thin-film transistor liquid
crystal display (TFT-LCD) column drivers. In the first type of the
column driver, two level shifters and two R-DACs are shared by four
channels for die area saving. Two full resolution R-DACs and two less
resolution R-DACs are used in four channels of the second column driver.
Two experimental prototype 8-bit column drivers were implemented using
0.35-
$\mu{m}$
CMOS technology to verify the proposed driving schemes.
The maximum DNL and INL are 0.68 LSB and 0.68 LSB, respectively, for
Type-I column driver, and are 0.81 LSB and 1.11 LSB, respectively,
for Type-II column driver. Compared with a conventional fully R-DAC
based TFT-LCD column driver, the proposed Type-I and Type-II column
drivers have an area saving of 29.6% and 24.9%.
© 2015 IEEE
PDF Article
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