Surface illumination device
US8858059B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2012 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Mar 7, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A surface illumination device has a light source and a light guide plate having a light-emitting surface. The light guide plate guides light from the light source such that the light is emitted from a display region of the light-emitting surface. A plurality of first deflection patterns having deflection inclined surfaces and a plurality of second deflection patterns having deflection inclined surfaces are formed in the display region in at least one of the light-emitting surface of the light guide plate and an opposite surface to the light-emitting surface. When viewed from a direction perpendicular to the light-emitting surface of the light guide plate, the first deflection pattern is disposed such that an angle formed by a line normal to the deflection inclined surface and a direction connecting the light source and the first deflection pattern is less than or equal to 30°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.