Power Consumption Model for AMOLED Display Panel Based on 2T-1C Pixel Circuit

Abstract

The display device has a significant contribution to the total power, which is critical for mobile consumer-electronic devices due to a limited battery capacity. We develop a power model of the active-matrix organic light-emitting diode (AMOLED) display and analyze the power contribution of thin-film transistor (TFT), OLED, and VDD line drop. Both theoretical analysis and calculation are derived from TFT mobility, OLED luminous efficiency, pixel aperture ratio, and VDD line drop. The TFT mobility from 0.1 to 10 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> /(V · s) is a bottleneck of display power. Metal oxide TFT may be more suitable for AMOLED display since relatively high mobility and low fabrication temperature. High luminous efficiency of OLED and top emission structure can decrease power consumption abundantly. The impact of copper wire technology is also discussed in large-size panels.