Lamp assembly

• US 7,828,471 B2
• Filed: 12/30/2008
• Issued: 11/09/2010
• Est. Priority Date: 06/11/2008
• Status: Expired due to Fees

• Current Assignee: Gold Charm Limited (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Lin, I-Thun
• Primary Examiner(s): Lee; Y My Quach
• Application Number:
  US12/346,818
• Publication Number:
  US 20090310351A1
• Time in Patent Office: 679 Days
• Field of Search: 362/26, 362/27, 362/216, 362/217.01, 362/217.05, 362/217.07, 362/554, 362/555, 362/615, 362/623, 362/624, 362/628
• US Class Current: 362/555
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/61 using light guides
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An exemplary lamp assembly includes a light guide member, a light reflective member and a light source. The light guide member includes a light-emitting surface, a concave surface opposite to the light-emitting surface, and a light incident surface connected between the light emitting surface and the concave surface. The light reflective member includes a reflective surface opposite to the concave surface of the light guide member. The light source is arranged adjacent to the light incident surface of the light guide member. The light source includes a circuit board, a plurality of light emitting diodes, and two contact pins. The light emitting diodes are electrically mounted on the circuit board and face toward the light incident surface. The contact pins are electrically connected to the circuit board and extend in a direction away from the light incident surface for electrical connection to a power source.

Claims

1. A lamp assembly comprising:

a light guide member comprising

a light-emitting surface,

a concave surface opposite to the light-emitting surface,

a light incident surface connected between the light emitting surface and the concave surface,

a groove defined in the concave surface, the groove extending along a lengthwise direction of the light guide member, and

a plurality of light scattering structures arranged on the concave surface;

a light reflective member comprising a reflective surface opposite to the concave surface of the light guide member, wherein the light reflective member comprises a protrusion protruding from the reflective surface, the protrusion extending in a lengthwise direction of the light reflective member and engaged in the groove in the concave surface; and

a light source arranged adjacent to the light incident surface of the light guide member, the light source comprising a circuit board, a plurality of light emitting diodes, and two contact pins, the light emitting diodes electrically mounted on the circuit board and facing toward the light incident surface, the contact pins electrically connected to the circuit board and extending in a direction away from the light incident surface for electrical connection to a power source.

2. The lamp assembly of claim 1, wherein the light guide member and the light reflective member cooperatively form a cylinder.

3. The lamp assembly of claim 1, wherein the shape of the cross-section of the groove is semi-circular.

4. The lamp assembly of claim 1, wherein the shape of the protrusion is semi-cylindrical.

5. The lamp assembly of claim 1, wherein the light scattering structures comprise a plurality of parallel V-shaped grooves extending along a lengthwise direction of the light guide member.

6. The lamp assembly of claim 1, wherein the light scattering structures comprise a plurality of scattering dots.

7. A lamp assembly comprising:

a light guide member comprising

a light-emitting surface,

a concave surface opposite to the light-emitting surface, and

two light incident surfaces connected between the light emitting surface and the concave surface and located at opposite sides of the light guide member;

a light reflective member comprising a reflective surface opposite to the concave surface of the light guide member, the light reflective member and the light guide member cooperatively forming a substantially cylindrical body;

two light source modules mounted at opposite ends of the substantially cylindrical body, each light source module comprising a circuit board, a plurality of light emitting diodes, and two contact pins, the light emitting diodes electrically mounted on the circuit board and facing toward the corresponding light incident surface, the contact pins electrically connected to the circuit board and extending in a direction away from the light incident surface for electrical connection to a power source; and

a groove defined in the concave surface of the light guide member, wherein the groove extending along a lengthwise direction of the light guide member;

wherein the light reflective member further comprises a protrusion protruding from the reflective surface, the protrusion extending in a lengthwise direction of the light reflective member and engaged in the groove in the concave surface.

8. The lamp assembly of claim 7, wherein the length of the light reflective member is greater than that of the light guide member.

9. The lamp assembly of claim 7, wherein the shape of the cross-section of the groove is semi-cylinder.

10. The lamp assembly of claim 7, wherein the shape of the protrusion is semi-cylindrical.

11. The lamp assembly of claim 7, wherein the light guide member is substantially a semi-cylinder, and the light reflective member is substantially a semi-cylinder.

12. The lamp assembly of claim 7, further comprising a plurality of light scattering structures arranged on the concave surface of the light guide member.

13. The lamp assembly of claim 12, wherein the light scattering structures comprise a plurality of parallel V-shaped grooves extending along a lengthwise direction of the light guide member.

14. The lamp assembly of claim 12, wherein the light scattering structures comprise a plurality of scattering dots.