Pixel Structure (IMAGE) University of Cincinnati Caption Shown is the pixel structure that is able to reveal or hide the pigments with high contrast and video speed. The reservoir (center circle) holds the pigment until it is ready to be displayed by application of voltage. Credit Gamma Dynamics LLC Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.