A new current-mirror pixel circuit employing poly-Si TFTs for active-matrix organic light-emitting-diode displays

2006 ◽  
Vol 14 (4) ◽  
pp. 411 ◽  
Author(s):  
Jae-Hoon Lee ◽  
Woo-Jin Nam ◽  
Hee-Sun Shin ◽  
Min-Koo Han ◽  
Yong-Min Ha ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Current Mirror ◽  
Active Matrix ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Pixel Circuit

A LTPS-TFT pixel circuit for active matrix organic light emitting diode based on improved current mirror

Displays ◽  
2016 ◽  
Vol 44 ◽  
pp. 1-4 ◽  
Author(s):  
Kun Sun ◽  
Liuyan Chen ◽  
Jianping Guo ◽  
Dongdong Teng ◽  
Lilin Liu
Keyword(s):  
Light Emitting Diode ◽  
Current Mirror ◽  
Active Matrix ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Pixel Circuit

A New Poly-Si TFT Current-Mirror Pixel for Active Matrix Organic Light Emitting Diode

2006 ◽  
Vol 27 (10) ◽  
pp. 830-833 ◽  
Author(s):  
J.-H. Lee ◽  
W. Nam ◽  
B.-K. Kim ◽  
H.-S. Choi ◽  
Y.-M. Ha ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Current Mirror ◽  
Active Matrix ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

A Novel Voltage-Programmed Pixel Circuit with Poly-Si TFTs for AMOLED Displays

2018 ◽  
Vol 27 (14) ◽  
pp. 1850221
Author(s):  
Zunkai Huang ◽  
Li Tian ◽  
Hui Wang ◽  
Songlin Feng
Keyword(s):  
Threshold Voltage ◽  
Light Emitting Diode ◽  
Active Matrix ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Electrical Stress ◽  
Organic Light ◽  
Pixel Circuit ◽  
Display Performance

In this paper, we propose a novel voltage-programmed pixel circuit with polysilicon thin–flim transistors (poly-Si TFTs) for active matrix organic light-emitting diode (AMOLED) displays, which consists of one programming transistor, one driving transistor, four switching transistors and two storage capacitors, respectively. Specifically, the proposed pixel circuit is able to not only efficiently compensate for the threshold variations of TFTs, but also largely suppresses the electrical degradations of the devices caused by the long-term electrical stress. Moreover, the mobility variation of the driving transistor can be compensated as well. The simulation has been performed by HSPICE, and results indicate that the average values of nonuniformities are, respectively, 7.3% as the threshold-voltage varies by [Formula: see text][Formula: see text]V and 2.1%, as the mobility of the driving transistor varies by [Formula: see text]%, both of which are much lower than that of the conventional two-transistor and one-capacitor (2T1C) pixel. Furthermore, since the OLED is reverse-biased during the nonemission phases, the lifetime of OLED will be extended naturally. As a consequence, the proposed pixel circuit can substantially improve the display performance.

Sign in / Sign up

Export Citation Format

Share Document