Illuminated laptop keyboard with uniform illumination
US8288673B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2010 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Feb 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2219/062
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A laptop keyboard in one embodiment includes a rectangular key printing film formed of an optically transmissive material and comprising keys; a rectangular luminescent sheet formed of optically transmissive silicone rubber, the luminescent sheet being mounted below the key printing film; an LED light source disposed to a side of the luminescent sheet; and a capacitive layer mounted below the luminescent sheet and comprising an insulative layer and pairs of upper and lower conductors wherein a pressing of the key changes capacitance of the pair of upper and lower conductors for typing or performing a predetermined command. Light emitted by the LED light source is directed to the luminescent sheet which in turn directs the light upward toward the key printing film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.