A 10-bit CMOS DAC With Current Interpolated Gamma Correction for LCD Source Drivers

Author

Liu, Pang-Jung ; Chen, Yi-Jan Emery

Author_Institution

Dept. of Electr. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan

Volume

22

Issue

6

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

958

Lastpage

965

Abstract

This paper presents a compact 10-bit digital-to-analog converter (DAC) for LCD source drivers. The cyclic DAC architecture is used to reduce the area of LCD column drivers when compared to the use of conventional resistor-string DACs. The current interpolation technique is proposed to perform gamma correction after D/A conversion. The gamma correction circuit is shared by four DAC channels using the interleave technique. A prototype 10-bit DAC with gamma correction function is implemented in 0.35 μm CMOS technology and its average die size per channel is 0.053 mm², which is smaller than those of the R-DACs with gamma correction function. The settling time of the 10-bit DAC is 1 μs, and the maximum INL and DNL are 2.13 least significant bit (LSB) and 1.30 LSB, respectively.

Keywords

CMOS integrated circuits; digital-analogue conversion; driver circuits; CMOS DAC; D/A conversion; DNL; INL; LCD source driver; LSB; R-DAC; conventional resistor-string DAC; current interpolated gamma correction; digital-to-analog converter; gamma correction; least significant bit; size 0.35 mum; time 1 mus; word length 1.30 bit; word length 10 bit; word length 2.13 bit; Active matrix liquid crystal displays; Computer architecture; Electronic mail; Gray-scale; Interpolation; Materials; Microprocessors; Current interpolation; LCD driver; digital-to-analog converter (DAC); gamma correction;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/TCSVT.2012.2186742

Filename

6148267