Optical waveguide structure with raised or embedded waveguides

• US 6,139,176 A
• Filed: 12/07/1998
• Issued: 10/31/2000
• Est. Priority Date: 07/02/1998
• Status: Expired due to Term

• Current Assignee: Rebo Lighting & Electronics, LLC
• Original Assignee: Federal-Mogul Worldwide Incorporated (Apollo Global Management, Inc.)
• Inventors: Young, Joe P., Woodward, Ronald O., Hulse, George R.
• Primary Examiner(s): Nguyen, Thong
• Assistant Examiner(s): Curtis, Craig
• Application Number:
  US09/206,306
• Time in Patent Office: 694 Days
• Field of Search: 362/581, 362/551, 362/576, 362/31, 362/30, 362/32, 362/27, 362/277, 385/18, 385/19, 385/39, 385/901
• US Class Current: 362/581
• CPC Class Codes: B60Q 3/66 for distributing light among several lighting devices
• CPC Class Codes: G02B 6/0005 the light guides being of the fibre type G02B6/0003 takes precedence
• CPC Class Codes: G02B 6/0006 Coupling light into the fibre in general G02B6/4298
• CPC Class Codes: Y10S 385/901 Illuminating or display apparatus

Abstract

An optical waveguide structure (1000) is configured to receive light from a light source (1020) and distribute the light to output ports. The structure includes a central portion having top and bottom surfaces, peripheral edges and an opening (1070) for receiving the light source (1020). A first waveguide (1010) extends above the top surface of the central portion. The first waveguide (1010) has an input face (1030) at an end nearest the opening (1070). The first waveguide (1010) extends from the opening (1070) toward a peripheral edge of the central portion.

Claims

1. An optical waveguide structure configured to receive light from a light source and distribute the light to output ports, characterized in that substructure comprises:

a central waveguide portion having top and bottom surfaces, peripheral edges and an opening for receiving the light source, and

a first waveguide extending from one of said top and said bottom surfaces of said central portion, said first waveguide having an input face at an end nearest said opening, and said first waveguide extending from said opening toward a peripheral edge of said central portion, said first waveguide receiving light transmitted from said central waveguide portion.

2. The optical waveguide structure of claim 1, wherein said first waveguide and said central waveguide portion are integrally formed as a single piece of material.

3. The optical waveguide structure of claim 1, wherein said input face of said first waveguide is orthogonal to a side of said first waveguide.

4. The optical waveguide structure of claim 5, wherein said input face of said first waveguide forms a non-orthogonal angle with respect to a side of said second waveguide.

5. The optical waveguide structure of claim 1, further comprising a second waveguide extending from one of said top and said bottom surfaces of said central portion, said second waveguide having an input face at an end nearest said opening, and said second waveguide extending from said opening toward a peripheral edge of said central portion.

6. The optical waveguide structure of claim 1, further comprising tabs positioned in an interior portion of said opening, the tabs being configured to attach the light source to said waveguide structure.

7. The optical waveguide structure of claim 1, further comprising a channel formed in said bottom surface beneath said first waveguide.

8. The optical waveguide structure of claim 7, wherein a width of said channel is narrower than a width of said first waveguide.

9. The optical waveguide structure of claim 7, wherein a width of said channel expands in a direction from the top surface to the bottom surface.

10. The optical waveguide structure of claim 7, wherein a depth of said channel is less than a thickness of said central waveguide portion.

11. The optical waveguide structure of claim 1 wherein said first waveguide extends from both of said top and said bottom surfaces.

12. The optical waveguide structure of claim 11, wherein said first waveguide and said central portion are integrally formed as a single piece of material.

13. The optical waveguide structure of claim 11, wherein said input face of said first waveguide is orthogonal to a side of said first waveguide.

14. The optical waveguide structure of claim 15, wherein said input face of said first waveguide forms a non-orthogonal angle with respect to a side of said second waveguide.

15. The optical waveguide structure of claim 11, further comprising of a second waveguide extending from both of said top and said bottom surfaces of said central portion, such second waveguide having an input face at an end nearest said opening, and said second waveguide extending from said opening towards said peripheral edges of said central portion.

16. The optical waveguide structure of claim 11, further comprising tabs positioned in an interior portion of said opening, the tabs being configured to attach the light source to said waveguide structure.

17. A lighting assembly comprising:

a light source,

a waveguide support structure made of an optically transmissive material having a top and a bottom surface,

said light source extending above said top surface; and

an integral optical waveguide on the top surface, receiving light directly from the light source, and receiving light reflected from the waveguide support structure, the optical waveguide being made of a solid material.

18. The optical waveguide structure of claim 17, further comprising a channel formed in said bottom surface beneath said optical waveguide.

19. The optical waveguide structure of claim 18, wherein a width of said channel is narrower than a width of said optical waveguide.

20. The optical waveguide structure of claim 18, wherein a depth of said channel is less than a thickness of said central portion.

21. The lighting component of claim 17, wherein the optical waveguide comprises an upper surface that is roughened to output light.

22. The lighting component of claim 17, wherein the optical waveguide comprises a notch formed in an upper surface of the optical waveguide to output light.

23. The lighting component of claim 17, wherein the optical waveguide comprises a branch portion that connects a first section of the waveguide to a second section of the waveguide, the branch having an upper surface that is roughened to output light.

24. The lighting component of claim 23, wherein the first section of the optical waveguide comprises a notch formed in a side surface of the waveguide to reflect light into the branch portion.