Planar Illumination Device
US7575358B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2006 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Feb 24, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/853
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Thinning of a planar illumination device using an LED is accelerated while higher and more uniform brightness is promoted.An LED 24 constituting the planar illumination device has no lamp house, but a translucent resin that seals an LED chip 25 is exposed. An outline of the translucent resin is formed as a projecting portion 28 comprising a continuous curved surface. Moreover, on a side end face 12a opposed to the LED 24 of a light guide plate 12, a notch portion 12d following the outline of the projecting portion 28 is formed, and on this notch portion 12d, a prism row 101 made of a plurality of unit prisms extending in a direction crossing the light guide plate 12 is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.