A Current-Mode Display Driver IC Using Sample-and-Hold Scheme for QVGA Full-Color AMOLED Displays

Author

Baek, Jong Hak ; Lee, Myunghee ; Lee, Jae Hoon ; Pae, Han Su ; Lee, Chang Ju ; Kim, Jin Tae ; Choi, Chang Sik ; Kim, Hong Kwon ; Kim, Tae Jin ; Chung, Ho Kyoon

Author_Institution

Syst. LSI Bus., Samsung Electron. Co. Ltd., Gyeonggi-Do

Volume

41

Issue

12

fYear

2006

Firstpage

2974

Lastpage

2982

Abstract

A display driver IC based on a current-sink driving scheme has been developed for QVGA (240times320), low-temperature poly-silicon (LTPS) active matrix organic light-emitting diodes (AMOLEDs) displays. The current-mode driver IC consists of a source driver block and a controller block. It uses a sample-and-hold scheme in the source driver block. The source driver block has 720 channel outputs, an 8-bit segmented DAC, a pre-charge generation block, and a 64-level gray scale (64 selections out of 256 gray levels for Gamma correction) per channel. The source driver output current ranges from 10 nA to 10 mum. The controller block generates control signals for the source driver and LTPS drivers (emission and scan driver), which are integrated on the panel glass. The current-mode driver IC was fabricated in a 0.18-mum CMOS technology (two poly and four metals) with 5.3-V high-voltage transistor devices

Keywords

current-mode circuits; driver circuits; organic light emitting diodes; sample and hold circuits; 0.18 micron; 5.3 V; QVGA full-color AMOLED displays; active matrix organic light-emitting diodes displays; controller block; current-mode display driver IC; low-temperature poly-silicon; sample-and-hold scheme; source driver block; switched current; Active matrix organic light emitting diodes; CMOS technology; Companies; Driver circuits; Flat panel displays; Glass; Gray-scale; Signal generators; Thin film transistors; Threshold voltage; AMOLED display; current-mode driver; sample-and-hold; switched current;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2006.885333

Filename

4014598