Prism sheet and backlight unit employing the same
US7448787B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2005 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Nov 30, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0053
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a prism sheet including a substrate transmitting incident light and having at least one groove inwardly formed in a surface of the substrate. A refractive member is provided in the groove and has a relatively higher refractive index than a refractive index of the substrate. A prism is arranged to face the refractive member, refract and transmit incident light, and has a relatively lower refractive index than the refractive index of the refractive member. A backlight unit is provided that includes at least one light source emitting light, along with a light guide panel that guides a procession of light emitted from the light source. The prism sheet includes at least one groove inwardly formed in a surface of the light guide panel. A refractive member is provided in the groove and a prism is arranged to face the refractive member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.