Illumination device for simulating channel letters

• US 7,118,251 B1
• Filed: 05/21/2004
• Issued: 10/10/2006
• Est. Priority Date: 05/23/2003
• Status: Expired due to Fees

• Current Assignee: iLight Technologies Incorporated (Luminii, LLC)
• Original Assignee: iLight Technologies Incorporated (Luminii, LLC)
• Inventors: Hulse, George R., Eriksson, Eric Olav, Cleaver, Mark J., Chambers, Joe A., Dominick, John R.
• Primary Examiner(s): Luebke, Renee
• Assistant Examiner(s): May, Robert
• Application Number:
  US10/850,743
• Time in Patent Office: 872 Days
• Field of Search: 405/44, 362544-545, 362/219, 362/223, 362/225, 359/707, 359/599, 359/513
• US Class Current: 362/311.02
• CPC Class Codes: G09F 13/0404 the light source being enclosed in a box forming the character of the sign
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00

Abstract

An illumination device generally comprises a housing, a light source, and a scattering member. The housing includes a base portion and a side wall, which collectively defines an interior cavity with an open end having a predetermined shape. A light source is positioned within the interior cavity, along with an electric connecting member adapted to connect the light source to a remote power source. A scattering member having substantially the same predetermined shape as the open end of the housing is positioned adjacent the light source at the open end of the interior cavity. The scattering member has a light-emitting surface and is composed of a material which causes light entering the scattering member to be directed through a portion of thereof before being scattered and emitted, such that a substantially uniform light pattern is perceived along the light-emitting surface of the scattering member in the predetermined shape.

Claims

1. An illumination device, comprising:

a housing, including a base portion and a side wall, which defines an interior cavity with an open end having a predetermined shape;

a light source positioned within said interior cavity;

an electric connecting member also positioned within said interior cavity and adapted to connect said light source to a remote power source; and

a scattering member positioned adjacent said light source at the open end of said interior cavity, said scattering member having substantially the same predetermined shape as the open end of said housing, and said scattering member having a light-emitting surface and being composed of an acrylic compound impregnated with malloons, which causes light entering said scattering member to be directed through a portion of said scattering member and then scattered and emitted, such that a substantially uniform light pattern is perceived along the light-emitting surface of said scattering member in said predetermined shape.

2. The illumination device as recited in claim 1, wherein said light source is a plurality of point light sources.

3. The illumination device as recited in claim 2, wherein said point light sources are light-emitting diodes.

4. The illumination device as recited in claim 2, and further comprising a plurality of collectors, each collector being associated with one of said point light sources for directing light emitted from said point light source into said scattering member.

5. The illumination device as recited in claim 1, wherein an interior surface of said housing is provided with a light-reflecting material.

6. The illumination device as recited in claim 5, wherein an exterior surface of said housing is provided with a light-absorbing material.

7. The illumination device as recited in claim 1, in which a portion of the volume of the interior cavity is filled with a light-transmitting potting material.

8. The illumination device as recited in claim 7, wherein light-transmitting potting material includes one or more light-fluorescing dyes, such that the substantially uniform light pattern perceived along the light-emitting surface of said scattering member has a hue distinct from that of the light source.

9. The illumination device as recited in claim 1, and further comprising an intermediate member generally composed of a matrix of light-transmitting material and one or more light-fluorescing dyes, said intermediate member including a light-receiving surface for receiving light of a predetermined first hue emitted from said light source and a light-emitting surface for emitting light into said scattering member, each of said light-fluorescing dyes emitting light of a predetermined wavelength following absorption of light from said light source, wherein a collective light ultimately emitted from said scattering member is of a second hue with a substantially uniform intensity along the light-emitting surface of the scattering member.

10. The illumination device as recited in claim 1, wherein said scattering member is composed of a material that includes one or more light-fluorescing dyes, such that the substantially uniform light pattern perceived along the light-emitting surface of said scattering member has a hue distinct from that of the light source.

11. An illumination device, comprising:

a housing, including a base portion and a side wall, which defines an interior cavity with an open end having a predetermined shape;

a light source positioned within said interior cavity;

an electric connecting member also positioned within said interior cavity and adapted to connect said light source to a remote power source; and

a scattering member positioned adjacent said light source at the open end of said interior cavity, said scattering member having substantially the same predetermined shape as the open end of said housing, and said scattering member having a light-emitting surface and being composed of a polyurethane compound impregnated with malloons, which causes light entering said scattering member to be directed through a portion of said scattering member and then scattered and emitted, such that a substantially uniform light pattern is perceived along the light-emitting surface of said scattering member in said predetermined shape.

12. The illumination device as recited in claim 11, wherein said light source is a plurality of light-emitting diodes.