광표시전극의 저항이 작은 NESA glass($In_2O_3$ 또는 $SnO_2$)로 Electro Chromism Display 소자를 마들어 주입하밀도, 광학밀도 그리고 응답특성 등을 착소광현상으로 실험한 결과, $WO_3$와 Cell내에 광전기화학반응을 일으키기 쉬운 물질이 함유된 경우에는 착소광의 반복이 가능하였고 착광특성이 좋았다. 착소광전압이 높을수록 전극저항이 낮을수록 또 $WO_3$박막이 얇을수록 반응특성이 좋아졌다. 따라서 Electro Chromism(EC)의 현상을 분석한 결과 착소광소자로서 시계, 계기, 행선안내판 등에 쓰이는 실용가능성을 발견하였다.
For experiment, we made the electro chemical display element with the NESA glass of display electrode which had low resistance. Density of injection charge, optical density and response characteristics were observed through coloring and achromatizing phemomena in the display element As optical electric chemical reaction was occured in $WO_3$ and cell, it was possible to repeat colouring and achromatizing, and the colouring characteristics was good. And the higher colouring and achromatizing voltage, the lower resistance of electrode and the thinner $WO_3$film was, the better response characteristics. With analyzing phenomena of electro chromism, we could find the possibility of practical use of the coloring and achromatizing element for clock, instrument and guide plate.
