Multi-color liquid display system
US5617657A · kind A · utility
Inventor
Key dates
| Filing date | Jan 29, 1996 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Jan 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F13/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multi-color liquid display system comprising a transparent conduit and system for sequentially circulating liquids of different color and different specific gravity through the conduit to present a dynamic display such as "raining" of one liquid into another. The circulating system includes a reservoir, a pump, device for communicating liquids in the reservoir with the transparent conduit, and device for controlling the proportionate flow of the different colored liquids from the reservoir. The display system includes a panel assembly in which a front transparent panel is bonded to a second transparent panel in spaced relation thereto and the conduit for liquids is formed in a desired configuration between the panels. The sign is illuminated by back lighting and the front panel is coated to mask all but the portions of the sign to be illuminated. The corridor can be configured with an enlarged chamber and a narrower contiguous portion with openings to the chamber whereby a first circulated liquid is received in the chamber and portions of a second different colored liquid are flowed into the chamber to simulate "raining" therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.