Light guiding plate and a keystroke module for use therewith
US7423229B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2006 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Jan 26, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2221/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A keystroke module for use with a light guiding plate includes a contacting and controlling layer, a light guiding plate and a light source. The contacting and controlling layer has a pressing side and a contacting and light guiding side. The light guiding plate is arranged under the contacting and light guiding side of the contacting and controlling layer and further includes a light auxiliary layer and a light inducting layer, which is a soft piece body having a reflecting side, on which plural light guiding parts are arranged, while the auxiliary light layer is a hard transparent piece body that is laminated correspondingly above the reflecting side of the light inducting layer. In addition, the light source is arranged at one side of the light guiding plate for irradiating light from the light auxiliary layer, then the light being reflected out by the reflecting side and the light guiding parts of the light inducting layer; thereby, it is possible to prevent the components contacted with the light inducting layer of the light guiding plate from easy wearing and permanent deforming, and the using lifetime of the light guiding plate or the keystroke module may be prolonged signif…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.