A 402-output TFT-LCD driver IC with power-controlling function by selecting number of colors

Author

Itakura, Tetsuro ; Minamizaki, H. ; Saito, Takashi ; Kuroda, Tadashi

Author_Institution

Corporate Res. & Dev. Center, Toshiba Corp., Japan

fYear

2002

fDate

2002

Firstpage

257

Lastpage

260

Abstract

A 402-output TFT-LCD driver with a power-controlling function by selecting a number of colors to be displayed is described. Power-controlling is realized by turning on and off reference voltage buffers used in DACs to convert RGB digital signals. The buffers must drive 1 to 402 capacitive loads. A phase compensation using a zero formed with the capacitive loads is proposed for the buffers. The analog section consumes 529 μA, 182 μA, 112 μA for 262,144 colors, 4,096 colors, 512 colors, respectively.

Keywords

CMOS integrated circuits; buffer circuits; colour displays; driver circuits; liquid crystal displays; mixed analogue-digital integrated circuits; 112 muA; 182 muA; 402-output TFT-LCD driver IC; 529 muA; CMOS process; DACs; RGB digital signal conversion; analog section power consumption; capacitive loads; color displays; phase compensation; power-controlling function; reference voltage buffers; zero; Analog circuits; Capacitance; Latches; Liquid crystal displays; Mobile handsets; Power dissipation; Research and development; Shift registers; Turning; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 2002. Proceedings of the IEEE 2002

Print_ISBN

0-7803-7250-6

Type

conf

DOI

10.1109/CICC.2002.1012808

Filename

1012808