Method for manufacturing a light-guiding plate and key module having the light-guiding plate
US7650056B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2006 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Apr 1, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
For manufacturing a light-guiding plate and a key module having the light-guiding plate, a mold is prepared first. Then, a material having high light transmittance is injected into the mold. After the plastic material is formed, the mold is released, so that the plastic material is formed into a sheet-like light-guiding plate, and one surface of the light-guiding plate is formed with a plurality of light-guiding portions thereon. The light-guiding plate is disposed in the key module of an electronic device. The light generated by light-emitting elements within the electronic device is introduced from the front end of a substrate of the light-guiding plate, and the light is refracted by the light-guiding portion to a corresponding key, thereby to display the numeral or pattern of the surface of a key cap of the key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.