A novel current memory circuit for AMOLEDs

Author

Lin, Yen-Chung ; Shieh, Han-Ping David

Author_Institution

Inst. of Electro-optical Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

51

Issue

6

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1037

Lastpage

1040

Abstract

A novel switched-current (SI) memory circuit with improved accuracy and operating frequency for active-matrix organic light-emitting displays (AMOLEDs) was developed. The proposed SI memory, constructed from current memory structure, can not only reduce the influence of charge-injection without using larger storage capacitor, but also realize the significant amount of speed up by means of small storage capacitor. Furthermore, the capability of copying the current signal is achieved without relying on the matching of device characteristics. The proposed SI memory circuit was implemented by low temperature poly-silicon technology and is suitable for current driving scheme-based high-resolution AMOLED applications.

Keywords

LED displays; capacitors; elemental semiconductors; organic light emitting diodes; semiconductor storage; silicon; switched current circuits; LTPS-TFT; OLED; SI memory circuit; active-matrix organic light-emitting displays; charge-injection; current driving scheme; current memory structure; current signal; device characteristic matching; high-resolution AMOLED applications; low temperature polysilicon technology; storage capacitor; switched-current memory circuit; thin-film transistors; Active matrix organic light emitting diodes; Active matrix technology; Capacitors; Circuits; Flat panel displays; Frequency; Parasitic capacitance; Switches; Thin film transistors; Voltage; AMOLEDs; Active matrix; LTPS-TFT; OLEDs; active matrix organic light-emitting displays; current memory; low temperature poly-silicon thin-film transistors; organic light-emitting displays; switched current;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2004.827371

Filename

1300842