Backlight module and keyboard
US8950881B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 18, 2013 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Sep 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2219/064
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight module includes a light guide plate, a light source, a light shielding sheet, a light reflecting sheet and a light shielding member. The light guide plate has a hole formed thereon and the hole has a side wall. The light source is disposed neighboring to the light guide plate and used for emitting light into the light guide plate. The light shielding sheet is disposed on the light guide plate. The light reflecting sheet is disposed below the light guide plate. The light shielding member is disposed in the hole and covers the side wall of the hole, so as to block the light guided by the light guide plate from being emitted out of the hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.