Key switch structure
US7525056B2 · kind B2 · utility
27Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2007 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Feb 16, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2221/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key switch structure includes a key top, a membrane sheet, a plate member, and a light source. The key top on which an unpainted character portion that is permeable to light is formed. The membrane sheet comprises a contact portion and is permeable to light. The plate member is disposed below the membrane sheet and is permeable to light. The light source is disposed below the plate member. The unpainted character portion of the key top is lighted via the plate member and the membrane sheet by causing the light source to emit light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.