A real time video data adjusting method for active matrix organic light emitting diode displays with high image quality

A real time video data adjusting method for television applications of active matrix organic light emitting diode (AMOLED) displays with high image quality is proposed. The proposed method senses electrical characteristics of polycrystalline silicon (poly-Si) thin film transistors (TFTs) and organic light emitting diode (OLED) of pixels and compensates nonuniform luminance due to the electrical characteristic variations of TFTs and the degradation of OLEDs by adjusting video data. The sensing and compensation operations are performed while the image is displayed on the screen. Experimental results show that the luminance error is improved from 92.1% to 0.8% when the proposed adjusting method is used. The proposed method is demonstrated on 14.1-inch AMOLED display panel.

[1]  S.R.P. Silva,et al.  Investigation on the current nonuniformity in current-mode TFT active-matrix display pixel circuitry , 2005, IEEE Transactions on Electron Devices.

[2]  Stephen R. Forrest,et al.  Design of flat-panel displays based on organic light-emitting devices , 1998 .

[3]  Hoon-Ju Chung,et al.  A new pixel circuit for active matrix organic light emitting diodes , 2002 .

[4]  Hai-Jung In,et al.  External Compensation of Nonuniform Electrical Characteristics of Thin-Film Transistors and Degradation of OLED Devices in AMOLED Displays , 2009, IEEE Electron Device Letters.

[5]  M. Weaver,et al.  OLED Device Operational Lifetime: Insights and Challenges , 2007, 2007 IEEE International Reliability Physics Symposium Proceedings. 45th Annual.

[6]  Man Young Sung,et al.  A novel current driving method using organic TFT pixel circuit for active-matrix OLED , 2007, 2007 Internatonal Conference on Microelectronics.

[7]  Chul-Hi Han,et al.  A new pixel circuit for active matrix organic light emitting diodes , 2002, IEEE Electron Device Letters.

[8]  A. Nathan,et al.  Single-Technology-Based Statistical Calibration for High-Performance Active-Matrix Organic LED Displays , 2007, Journal of Display Technology.

[9]  Ya-Hsiang Tai,et al.  A new pixel circuit for driving organic light-emitting diode with low temperature polycrystalline silicon thin-film transistors , 2005, Journal of Display Technology.

[10]  Nao Mishima,et al.  Novel frame interpolation method for hold-type displays , 2004, 2004 International Conference on Image Processing, 2004. ICIP '04..

[11]  C. H. Chen,et al.  Electroluminescence of doped organic thin films , 1989 .

[12]  Oh-Kyong Kwon,et al.  Voltage-programming method with transimpedance-feedback technique for threshold voltage and mobility compensations in large-area high-resolution AMOLED displays , 2006 .

[13]  H.C. Lin,et al.  New Current Programmed Pixel Circuit for Active-Matrix Organic Light-Emitting-Diode Displays , 2007, 2007 IEEE Conference on Electron Devices and Solid-State Circuits.

[14]  Ya-Hsiang Tai,et al.  A new pixel circuit for driving organic light-emitting diode with low temperature polycrystalline si , 2005 .