Power optimization of thermally actuated organic display by pulse width modulation technique

Abstract

A power optimization method, pulse width modulation (PWM) technique, is proposed for a thermochromic organic display that consists of a polydiacetylene (PDA) derivative film as the thermally activating material. Heat generation of micro heaters by pulse generator is more efficient in power minimization than by dc voltage supply. The pulse wave of about 30% duty ratio is the most appropriate for power minimization. In addition to the power reduction, pulse wave activation can circumvent the overheating problem.