IP Library › Granted Patent US 8,201,956
Granted Patent B2
US 8,201,956 · App. 12/770,530 · Granted Jun 19, 2012

Task light

Assignee: 3M Innovative Properties Company
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Quick Facts
Patent No.
US 8,201,956
App. No.
12/770,530
Granted
Jun 19, 2012
Kind
B2
Abstract

A task lighting apparatus produces glare-free illumination of a work area. The apparatus includes a shade defining a cavity having an opening, a light source positioned to emit light into the cavity, and a glare control member disposed within the opening wherein the diffuser comprises a louvered array of dual brightness enhancement film.

Claims (9)

1. A light fixture comprising a shade having a number of vent openings formed therein and defining a cavity having an opening, a light source positioned to emit light into said cavity, and a glare control member disposed within said opening wherein said glare control member comprises a louvered array comprising a plurality of light transmissive, light diffusing members arranged parallel to each other with openings therebetween, defining a plane and oriented such that members overlap with adjacent members in the direction perpendicular to the plane of the array.

2. The fixture of claim 1 further comprising a reflector on the inner surface of said cavity.

3. The fixture of claim 1 wherein said light source is at least a device selected from the group consisting of an incandescent bulb, a fluorescent lamp, a light emitting diode, and a combination thereof.

4. The fixture of claim 1 wherein said light diffusing members comprise light polarizing material.

5. The fixture of claim 4 wherein said light polarizing material tends to pass p-waves and to reflect s-waves.

6. The fixture of claim 5 wherein said light polarizing material transmits at least 50% of p-wave light incident thereto and transmits less than 50% of s-wave light incident thereto.

7. The fixture of claim 5 wherein said light polarizing material transmits at least 75% of p-wave light incident thereto and transmits less than 35% of s-wave light incident thereto.

8. The fixture of claim 5 wherein said light polarizing material transmits at least 85% of p-wave light incident thereto and transmits less than 20% of s-wave light incident thereto.

9. The fixture of claim 1 wherein said members are oriented to said plane at an angle from about 10° to about 80°.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 14, 2010
From: YEH, KUO-TAI
To: 3M INNOVATIVE PROPERTIES COMPANY
Reel/Frame 024681/0996 →
Continuity (2)
Provisional Application 61174172 · Apr 30, 2009
Related Publication 20100277888A1 · Nov 4, 2010