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Switching between metric and imperial units can be complicated. To solve this problem, we have created a very convenient product called the E-ink Ruler. The E-ink Ruler has four major features. First, it is able to change from one unit to the other immediately while being used. Second, it enables users to estimate the length of anything quickly. Third, it makes dividing a length into equal parts very easy just by adjusting the E-ink Rulers divide button. Fourth, when it is wrapped around a cylindrical object, it is able to calculate the diameter and radius automatically.
National Taiwan University of Science and Technology
Keelung City, Taiwan
Hsin Yeh, Yan-Ting Chen