Title :
Design of exponential stage for organic pixel addressing
Author :
El Halim, Ahmed A Abd ; Korzec, Darek Z.
Author_Institution :
Fac. of Electr. & Electron. Eng., German Univ. in Cairo, Cairo, Germany
Abstract :
This paper presents a new approach for driving an organic light emitting diode (OLED) pixel circuit using organic thin film transistor (OTFT). Depending on the linear relation between the current passing through the OLED and its luminosity and relying on Weber´s law which states that the sensation of the eye to the change in brightness is logarithmic to the change itself an improved column driver is proposed. An exponential stage is added to the column driver after the digital to analog converter (DAC) block to supply the pixel circuit with exponential current. The design is done with OTFT (n-type and p-type). The model is extracted according to the current technology of organic electronics.
Keywords :
CMOS integrated circuits; brightness; digital-analogue conversion; driver circuits; integrated circuit design; organic light emitting diodes; thin film transistors; CMOS exponential circuit; OLED; Weber law; brightness; column driver; digital-to-analog converter; exponential current; exponential stage; eye sensation; luminosity; organic electronics; organic light emitting diode pixel circuit; organic pixel addressing; organic thin film transistor; Active matrix organic light emitting diodes; CMOS technology; Circuit simulation; Driver circuits; Fabrication; Flat panel displays; Organic light emitting diodes; Organic thin film transistors; Thermal degradation; Thin film transistors; Organic Light Emitting Diode (OLED); Organic Thin Film Transistor (OTFT); Weber´s Law;
Conference_Titel :
Microelectronics, 2008. ICM 2008. International Conference on
Conference_Location :
Sharjah
Print_ISBN :
978-1-4244-2369-9
Electronic_ISBN :
978-1-4244-2370-5
DOI :
10.1109/ICM.2008.5393557
