Information presenting device
US7942538B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2006 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Sep 14, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/0283
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention is directed towards an information presenting device and a portable electronic device including such an information presenting device. The information presenting device (16) comprises a first information layer (18) having a first information presentation structure (20) of photo chromatic material changing appearance when irradiated by light (28) of a specific wavelength, a second information layer (22) having a second information presentation structure (24), and a first light source (26) illuminating the second information layer for presenting the second information presentation structure, wherein the first information layer is of a material that is transparent for light emanating at least from the first light source when the first layer is not exposed to light of said specific wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.