An Area Look-Up-Table based Controller for Improving Performance of Luminance on Lighting Passive Matrix Organic Light Emitting Diodes Panels

  • Juan, Chang-Jung (Dept. of Electronic Engineering, Hwa Hsia Institute of Technology) ;
  • Tsai, Ming-Jong (Graduate School of Engineering Technology) ;
  • Liu, Chia-Lin (Central Research Institute, Chunghwa Picture Tubes, Ltd.) ;
  • Mo, Chi-Neng (Central Research Institute, Chunghwa Picture Tubes, Ltd.)
  • Published : 2005.07.19

Abstract

This study proposes a controller with the techniqu e of voltage -compensated driver for producing grayscaled pictures on passive matrix organic light emitting diodes (PMOLEDs) panels; especially, the controller overcomes the problem of luminance nonuniformity on displaying pictures. Because the controller is a voltage type driver, the output impedance of the driver is much less than that of the current-type driver. Hence, the controller provides a better electron-optical response than those of traditional current drivers. An area compensated look-up table (ACLUT) is designed in data feeding paths for removing luminance non-uniformity; thus, the proposed controller provides nearly 95% luminance uniformity.

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