Flexible backlight unit for key of input device
US7364339B2 · kind B2 · utility
21Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2006 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Jun 25, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a backlight unit for a key of an input device. The unit includes a light guide plate and at least one light emitting unit. The light guide plate is formed of flexible transparent resin and has a light guide pattern portion in which a plurality of engraved patterns are formed in a plurality of requirement character shapes so that light can be diffused and scattered at desired luminance from a necessary light emitting portion, using a minimal number of light sources. The light emitting unit is installed at a side wall of the light guide plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.