Magnet erased eWriter
US11262635B1 · kind B1 · utility
1Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2021 |
| Grant date | Mar 1, 2022 |
| Priority date | — |
| Expiry date | Feb 5, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/026
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A magnet erased writing device or eWriter includes cholesteric liquid crystal material, in which a written image is erased using magnetically activated electronic circuitry. By eliminating the mechanical erase button of Prior Art eWriters, the eWriter can be designed with a display footprint that can cover nearly the entire face of the eWriter. An erasing magnet can be used with the device, which can be handheld as, for example, by being part of a stylus. With the erasing magnet separated from the device and the mechanical erase button being omitted, the eWriter avoids unintentional erasures, a drawback of Prior Art eWriters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.