BubBowl: Display Vessel Using Electrolysis Bubbles in Drinkable Beverages

Research has been conducted regarding a display that presents digital information using bubbles. Conventional bubble displays require moving parts, because it is common that air taken from outside of the water is used to present pixels. However, it is difficult to increase the number of pixels at a low cost. We propose a novel bubble display using gas generated from electrolysis, and present a cup-type system that generates a dot matrix pattern with 10 × 10 pixels on the surface of a beverage. Our technique requires neither a gas supply from the outside nor moving parts. Using the proposed electrolysis method, a higher-resolution display can be easily realized using a PCB with a higher density of matrix electrodes. Moreover, the method is simple and practical, and it can be utilized in daily life, such as for presenting information with bubbles on the surface of coffee in a cup.