LED lighting device

• US 7,600,907 B2
• Filed: 09/21/2007
• Issued: 10/13/2009
• Est. Priority Date: 08/08/2007
• Status: Expired due to Fees

• Current Assignee: Ledtech Electronics Corp.
• Original Assignee: Ledtech Electronics Corp.
• Inventors: Lee, Hung-Hsin, Liu, Yen-Fu
• Primary Examiner(s): O'Shea; Sandra L
• Assistant Examiner(s): DZIERZYNSKI, EVAN P
• Application Number:
  US11/859,692
• Publication Number:
  US 20090040782A1
• Time in Patent Office: 753 Days
• Field of Search: 362/555, 362/581, 362/35, 362/249.03, 362/269, 362/287, 362/418, 362/396, 362/438
• US Class Current: 362/555
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21S 4/20 with light sources held by or within elongate supports
• CPC Class Codes: F21V 15/013 the housing being an extrusion
• CPC Class Codes: F21V 19/001 the light sources being semiconductors devices, e.g. LEDs
• CPC Class Codes: F21V 19/04 with provision for changing light source, e.g. turret auxiliary devices for cleaning, placing, or removing incandescent lamps H01K3/32, fluorescent lamps H01J9/006
• CPC Class Codes: F21V 21/30 Pivoted housings or frames
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED lighting device includes a light pipe and a support portion. The light pipe includes a light emitting diode module inside and two first fastening portions on an outer wall thereof. A support portion secures the light pipe and provides a rotatable function for the light pipe. The support portion further includes a clamp and a base member. A clamp has two second fastening portions at opposite sides thereof. The second fastening portions engage with the first fastening portions. The clamp further includes a strip hollow slot. A base member includes a pair of positioning portions for holding an outer wall of the clamp, wherein a fastener is led through the strip hollow slot and fastened on the base member. The clamp slides relative to the base member along the strip hollow slot such that the light pipe rotates relative to the base member.

Claims

1. An LED lighting device, comprising:

a light pipe, comprising a light emitting diode module inside and a pair of first fastening portions on an outer wall thereof;

a support portion for securing the light pipe and providing a rotatable function for the light pipe, the support portion comprising;

an arc-shaped clamp, comprising a pair of second fastening portions at opposite sides thereof, the pair of second fastening portions engaging with the pair of first fastening portions, the arc-shaped clamp further comprising a strip hollow slot; and

a base member, comprising a pair of positioning portions for holding an outer wall of the arc-shaped clamp, wherein a fastener is led through the strip hollow slot and fastened on the base member, the arc-shaped clamp slides relative to the base member along the strip hollow slot such that the light pipe rotates relative to the base member.

2. The LED lighting device of claim 1, wherein the light pipe comprises a semicircular cross-section, which is concentric with a cross-section of the arc-shaped clamp.

3. The LED lighting device of claim 1, wherein the light pipe comprises a housing and a transparent emitting flat sheet.

4. The LED lighting device of claim 3, wherein the light pipe further comprises a first reflective surface and a second reflective surface inside the housing, the transparent emitting flat sheet and extension surfaces of the first reflective surface and the second reflective surface together define a hollow triangular cylinder.

5. The LED lighting device of claim 4, wherein an included angle between the transparent emitting flat and the first reflective surface is unequal to an included angle between the transparent emitting flat and the second reflective surface.

6. The LED lighting device of claim 5, wherein the housing comprises a hollow space penetrating through the housing.

7. The LED lighting device of claim 1, wherein the base member comprises two holes such that screws is led through the holes to secure the base member on a wall.

8. The LED lighting device of claim 1, further comprising a fastening member for securing the arc-shaped clamp to the base member, wherein the arc-shaped clamp is sandwiched between the positioning member and the base member.

9. The LED lighting device of claim 1, wherein the outer wall of the arc-shaped clamp further comprises a plurality of convex members arranged in parallel with the strip hollow slot.

10. The LED lighting device of claim 9, wherein the convex members are arranged along two rows.

11. The LED lighting device of claim 10, wherein the strip hollow slot is located between the two rows of convex members.

12. The LED lighting device of claim 1, wherein the pair of first fastening portions is a pair of concave sections.

13. The LED lighting device of claim 12, wherein the pair of second fastening portions is a pair of hooks.

14. The LED lighting device of claim 1, wherein the pair of positioning portions respectively extend outward from two opposite sides of the base member to form two positioning wings.