Data Supply Voltage Reduction Scheme for Low-Power AMOLED Displays

ETRI Journal

关键词: AMOLED;    level-shifting;    low-power;    Data supply voltage reduction;   

Others  :  1186295
DOI  :  10.4218/etrij.12.0112.0139

【 摘 要 】

This paper demonstrates a new driving scheme that allows reducing the supply voltage of data drivers for low-power active matrix organic light-emitting diode (AMOLED) displays. The proposed technique drives down the data voltage range by 50%, which subsequently diminishes in the peak power consumption of data drivers at the full white pattern by 75%. Because the gate voltage of a driving thin film transistor covers the same range as a conventional driving scheme by means of a level-shifting scheme, the low-data supply scheme achieves the equivalent dynamic range of OLED currents. The average power consumption of data drivers is reduced by 60% over 24 test images, and power consumption is kept below 25%.

   

【 参考文献 】

• [1]S.S. Kim, “The Next Big Thing in Displays,” keynote presentation, SID, 2010.
• [2]J. Souk and S. Whangbo, “Green Technology in LCDs,” Information Display, vol. 26, no. 11&12, Nov./Dec. 2010, pp. 4-7.
• [3]K. Teunissen and L.J. de OLDE, “EcoDesign for TV Displays’ Information Display,” Inf. Display, vol. 26, no. 11&12, Nov./Dec. 2010, pp. 10-14.
• [4]J.Y. Lee, J.H. Kwon, and H.K. Chung, “High Efficiency and Low Power Consumption in Active Matrix Organic Light Emitting Diodes,” Organic Electron., vol. 4, no. 2-3, Sept. 2003, pp. 143-148.
• [5]S.H. Jung et al., “A New Low-Power pMOS Poly-Si Inverter for AMDs,” IEEE Electron Device Lett., vol. 26, no. 1, Jan. 2005, pp. 23-25.
• [6]H. Kanno et al., “Reduction in Power Consumption for Full-Color Active Matrix Organic Light-Emitting Devices,” Jpn. J. Appl. Phys., vol. 45, no. 35, Sept. 2006, pp. L947-L950.
• [7]H. Nam and S.-W. Lee, “Low-Power Liquid Crystal Display Television Panel with Reduced Motion Blur,” IEEE Trans. Consum. Electron., vol. 56, no. 2, May 2010, pp. 307-311.
• [8]N. Komiya et al., “Comparison of Vth Compensation Ability among Voltage Programming Circuits for AMOLED Panels,” Proc. 10th Int. Display Workshops, 2003, pp. 275-278.
• [9]T. Sasaoka et al., “A 13.0-inch AM-OLED Display with Top Emitting Structure and Adaptive Current Mode Programmed Pixel Circuit (TAC),” Soc. Inf. Display (SID) Symp. Digest, 2001, pp. 384-386.
• [10]T. Inukai et al., “4.0-in. TFT-OLED Displays and a Novel Digital Driving Method,” Soc. Inf. Display (SID) Symp. Digest, 2000, pp. 924-927.
• [11]R.M.A. Dawson et al., “Design of an Improved Pixel for a Polysilicon Active-Matrix Organic LED Display,” Soc. Inf. Display (SID) Symp. Digest, 1998, pp. 11-14.