Patent · US Active

Bulb reflector for thin direct lit backlights

US7802893B2 · kind B2 · utility

0Cited by

5References

16Claims

0Family size

Assignee

Sabic Innovative Plastics B.V. · NL

Inventors

John Frederick Graf · Ballston Lake, US
Dennis Coyle · Clifton Park, US

Key dates

Filing date	May 16, 2008
Grant date	Sep 28, 2010
Priority date	—
Expiry date	Dec 2, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/133604
WIPO fieldOptics
WIPO sectorInstruments

Abstract

In one embodiment, a backlight assembly comprises: a bulb having a bulb first side and a bulb second side located on a side of the bulb opposite the first side, a reflector plate disposed on the bulb first side, and a front bulb reflector disposed over the bulb second side. The front bulb reflector has a partially reflective member capable of reflecting greater than or equal to 60% of light from the bulb toward the reflector plate, and an inner surface on a reflector second side located opposite the reflector first side. The overall geometry of the front bulb reflector is concave on the reflector second side and convex on the reflector first side.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.