Decorative light

Patent metadata

Field	Value
Publication number	US-9726349-B2
Application number	US-201214009550-A
Country	US
Kind code	B2
Filing date	Mar 30, 2012
Priority date	Apr 7, 2011
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

The present disclosure provides decorative lights using prismatic film such as Optical Lighting Film (OLF) available from 3M Company, and a diffuse partial reflector. The decorative lights generate design styles and comfort for a light fixture, and can use solid state lighting such as Light Emitting Diodes (LEDs) to generate the light. The decorative lights can have an appearance that changes with the viewing angle of the light.

First claim

What is claimed is:

1. A decorative light, comprising:
a perforated reflector configured to define a cavity having a length and a curved cross-section, the perforated reflector having a first major surface facing an interior of the cavity;
a bulk or surface scattering diffuser laminated to a second major surface of the perforated reflector;
a first microstructured film disposed adjacent the diffuser and on the opposite side of the perforated reflector, the first microstructured film extending along a first portion of the length of the cavity;
a second microstructured film disposed adjacent the diffuser and on the opposite side of the perforated reflector, the second microstructured film extending along a second portion of the length of the cavity adjacent the first portion of the length of the cavity; and
a light source disposed to inject light into the interior of the cavity;
wherein the first microstructured film and the second microstructured film each comprise a planar major surface and a vee-grooved major surface aligned with the length of the cavity, and further wherein the vee-grooved major surface of the first microstructured film is adjacent the diffuser, and the planar major surface of the second microstructured film is adjacent the diffuser.

2. The decorative light of claim 1 , wherein the light source comprises at least one LED disposed adjacent the first major surface of the perforated reflector.

3. The decorative light of claim 1 , wherein the first microstructured film and the second microstructured film are film segments that alternate along the length of the cavity.

4. The decorative light of claim 1 , wherein the light source comprises a light emitting diode (LED), a fluorescent lamp, a halogen lamp, an incandescent lamp, an electroluminescent lamp, an organic light emitting diode (OLED), solar radiation, or a combination thereof.

5. The decorative light of claim 1 , wherein the perforated reflector comprises a broadband mirror.

6. The decorative light of claim 5 , wherein the broadband mirror comprises a metal, a metalized film, or a dielectric thin-film stack.

7. The decorative light of claim 5 , wherein the broadband mirror comprises a polymeric multilayer reflector.

8. The decorative light of claim 1 , wherein the perforated reflector comprises from about 10% to about 50% open area.

9. The decorative light of claim 1 , wherein the perforated reflector comprises an array of circular perforations.

10. The decorative light of claim 1 , wherein the diffuser comprises a bulk diffuser having a transmission from about 10% to about 80%.

11. The decorative light of claim 1 , wherein the vee-grooved major surface includes symmetric vee-grooves, asymmetric vee-grooves, or a combination thereof.

Assignees

• Tai Huiwen
• 3M Innovative Properties Co

Inventors

• Tai Huiwen

Classifications

• F21S6/002

  Table lamps, e.g. for ambient lighting · CPC title

• F21W2121/00

  Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00 · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V13/04 Primary

  the elements being reflectors and refractors {(for vehicle rear lights F21S43/40)} · CPC title

• F21S11/007

  characterised by the means for transmitting light into the interior of a building · CPC title