Alphanumeric and graphic water display
US5363577A · kind A · utility
Inventors
Key dates
| Filing date | Jul 19, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Jul 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F13/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid display that has a plurality of adjacent parallel tubes filled with a fluid and connected to a source of air that introduces bubbles into the tubes, so that the combination of bubbles form a word, or another recognizable graphic display. Each tube has a valve connected to the air supply, that controls the duration and flowrate of air injected into the tube so that a single bubble is formed within the tube. The valves are connected to a computer that opens and closes each valve to produce a pattern of bubbles in accordance with a computer program within the computer. The program creates a combination of bubbles that together depict a legible design or display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.