An Opportunistic Source Line Driving Scheme for Low Power Mobile TFT-LCD Driver IC

Author

Lee, Jae-Goo ; Woo, Jae-Hyuck ; Kong, Bai-Sun ; Jun, Young-Hyun ; Lee, Chil-Gee ; Kang, Im-Soo ; Kim, Bong-Nam ; Kim, Jin-Tae

Author_Institution

School of Information and Communication Engineering, SungKyunKwan University, Kyunggi-do, Korea. E-mail: leej9@skku.edu

fYear

2005

fDate

19-21 Dec. 2005

Firstpage

565

Lastpage

566

Abstract

An opportunistic source line driving (OSLD) scheme is proposed for use in mobile TFT_LCD driver ICs (T-LDIs). In OSLD scheme, the operation of the source drivers of a T-LDI is controlled by the equivalence of RGB color data for adjacent pixels. That is, one source driver drives the neighboring source lines as well as the corresponding one when the color data of adjacent pixcels are identical to each other. With this scheme, all the source drivers associated with the neighboring source lines can be completely turned off, allowing the reduction of static and dynamic current of these drivers. Test chip was fabricated in a 5-V/0.8-um 2.5V/0.25-um triple-metal CMOS process, and the experimental result shows that the power reduction of 12% ~ 21% was obtained with die size overhead less than 0.5%.

Keywords

Driver circuits; Electronic equipment testing; Energy consumption; Graphics; Liquid crystal displays; Logic; Mobile handsets; Power generation; Thin film transistors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices and Solid-State Circuits, 2005 IEEE Conference on

Print_ISBN

0-7803-9339-2

Type

conf

DOI

10.1109/EDSSC.2005.1635335

Filename

1635335