Method and apparatus pertaining to keycap light guides
US9601285B2 · kind B2 · utility
0Cited by
0References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2012 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Aug 18, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49105
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus (such as a keyboard) has a plurality of keycaps and a corresponding light guide film disposed on the underside of those keycaps. The light guide film has a periphery, and at least portions of that periphery are thicker than in an interior portion of the light guide film. So configured, more light can be made available for backlighting purposes in the thicker portions than at the thinner portions. These teachings include determining the various (different) thicknesses to employ for the light guide film based upon desired backlighting of one or more of the plurality of keycaps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.