Electrophoretic display keypad structure
US8441445B2 · kind B2 · utility
3Cited by
1References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 2010 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | Jan 14, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/0266
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electrophoretic display keypad structure utilizes a whole piece of electrophoretic display film to show a plurality of figures for keys. The electrophoretic display film is disposed on a printed circuit board having a patterned electrode and sealed by a sealant or a sealing material applied to entire periphery of the electrophoretic display film for preventing humidity or pollution, thereby to display excellent figures and be made relatively easily. The figures displayed may be changed by selecting a desired mode, and users may accordingly easily choose desired figures for pressing the keys.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.