Adjustable gamma correction circuit for TFT LCD

Author

Lee, Po-Ming ; Chen, Hung-Yi

Author_Institution

Dept. of Electron. Eng., Southern Taiwan Univ. of Technol., Taiwan

fYear

2005

fDate

23-26 May 2005

Firstpage

780

Abstract

Gamma correction is an essential function in every display device such as CRT, plasma TV, and TFT LCD. In this paper, a new gamma correction architecture of the source drive IC used in the TFT LCD is proposed. Instead of using non-linear DAC architecture, a linear DAC architecture is used to reduce the number of resistors required. The complexity of our design is also reduced due to less resistors. Moreover, the proposed design is capable to support multiple gamma values from 2.2 to 2.5 without further cost. In short, the proposed gamma correction design possesses several advantages which makes it a better alternative.

Keywords

CMOS integrated circuits; brightness; circuit simulation; driver circuits; integrated circuit design; liquid crystal displays; thin film transistors; CMOS process; TFT LCD; adjustable gamma correction circuit; design complexity; gamma correction architecture; gamma correction design; linear DAC architecture; resistors; source drive IC; Cathode ray tubes; Circuits; Costs; Liquid crystal displays; Plasma displays; Resistors; Streaming media; Thin film transistors; Very large scale integration; Voltage; Gamma Correction; Linear DAC; VLSI; gamma 2.2; gamma 2.5;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1464704

Filename

1464704