LED lamp

• US 7,066,626 B2
• Filed: 04/08/2004
• Issued: 06/27/2006
• Est. Priority Date: 04/09/2003
• Status: Active Grant

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Omata, Kazuki
• Primary Examiner(s): Luebke, Renee
• Assistant Examiner(s): Shallenberger, Julie A.
• Application Number:
  US10/820,109
• Publication Number:
  US 20040201987A1
• Time in Patent Office: 810 Days
• Field of Search: 362/227, 362/235, 362/249, 362/252, 362/257, 362/260, 362/307, 362/308, 362/310, 362/317, 362/326, 362328- 9, 362/347, 362/350
• US Class Current: 362/257
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/486 adapted for surface mounting
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

An LED lamp including a circuit substrate (22) on which an electrode pattern is formed, a reflecting frame (31) including a tapered concave portion (32) having an inner peripheral surface broadening toward an upper end of the reflecting frame, a light emitting unit (27) disposed on a central portion of the concave portion (32), an air layer (40) disposed above the light emitting unit (27), and a lens body (44) provided through the air layer above the reflecting frame (31), the reflecting frame being provided with an air hole (45) for communicating the air layer with an outside area of the LED lamp.

Claims

1. An LED lamp comprising:

a circuit substrate provided with an electrode pattern;

a light emitting unit mounted on said circuit substrate;

a reflecting frame mounted on said circuit substrate and including a concave portion disposed to surround said light emitting unit;

a lens body disposed above the light emitting unit and attached to said reflecting frame to seal the concave portion of the reflecting frame;

one air hole provided in at least one of the circuit substrate, the reflecting frame and the lens body for communication between the sealed concave portion of the reflecting frame and an outside of the lamp; and

a reflecting surface formed on an inner peripheral surface of the concave portion of the reflecting frame,

said reflecting surface including a taper shape configured to broaden toward an upper end of the reflecting frame.

2. The LED lamp according to claim 1, wherein said light emitting unit includes a plurality of light emitting diode elements and a transparent or translucent resin material to seal said light emitting diode elements.

3. The LED lamp according to claim 2, wherein the plurality of light emitting diode elements comprise a semi-conductor of a gallium nitride system compound.

4. The LED lamp according to claim 2, wherein the plurality of light emitting diode elements are spaced equally peripherally of a central portion of the reflecting surface.

5. The LED lamp according to claim 1, wherein said lens body has a light incident surface and a light exit surface, and at least one of the light incident and exit surfaces comprises a convex surface or fresnel surface.

6. The LED lamp according to claim 1,

wherein said lens body has a light incident surface and a light exit surface,

wherein the light incident surface comprising a convex surface or fresnel surface is disposed to face the light emitting unit, and the exit surface is composed of a planar surface.

7. The LED lamp according to claim 6,

wherein said convex surface or fresnel surface formed on the light incident surface of the lens body is disposed to face the light emitting unit inside the concave portion of the reflecting frame,

wherein an outer edge of the planar surface formed on the light exit surface of the lens body is substantially flush with an outer side of an upper end of the reflecting frame.

8. The LED lamp according to claim 1, wherein said light emitting unit includes a blue light emitting diode element, a resin body to seal the blue light emitting diode element and a fluorescent material of yttrium, aluminum, garnet (YAG), mixed in the resin material, in order to obtain a light emitting color of white.

9. The LED lamp according to claim 1, wherein said light emitting unit includes a three kinds of light emitting diode elements comprising red, green and blue colors and a resin body to seal the light emitting diode elements.

10. The LED lamp according to claim 1, wherein a mirror surface or plating surface is provided on said inner peripheral surface of the concave portion.

11. The LED lamp according to claim 1, wherein said circuit substrate and the reflecting frame are formed by a molded interconnect device to form a circuit and an electrode on a three-dimensional resin molding.

12. The LED lamp according to claim 1,

wherein said lens body has a light incident surface and a light exit surface,

wherein the light incident surface comprising a planar surface is disposed to face the light emitting unit, and the exit surface comprises a convex surface.