LED lamp unit

• US 20050243577A1
• Filed: 04/28/2005
• Published: 11/03/2005
• Est. Priority Date: 04/29/2004
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Moon, Jeong Min
• Granted Patent: US 7,950,831 B2
• Time in Patent Office: Days
• US Class Current: 362/612
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• 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 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/54 having a particular shape

Abstract

A light emitting diode (LED) lamp unit is disclosed for obtain a thin profile display device, to improve uniformity of light, and to simplify a power connection line for operation, which includes an optical lens having a central recess part and an edge, wherein the central recess part is hollowed out inwardly, and the edge is formed in shape of a flat surface or in shape of a convex lens; at least one or more LED chips arranged at fixed intervals in a lower portion of the optical lens; and a lower reflecting sheet positioned on a bottom surface of the LED chip.

Claims

1. An LED lamp unit for a liquid crystal display device comprising:

an optical lens having a central recess part and an edge, wherein the central recess part is hollowed inwardly, and the edge is formed in shape of a flat surface or a convex lens;

at least one or more LED chips arranged at fixed intervals in a lower portion of the optical lens; and

a lower reflecting sheet positioned on a bottom surface of the LED chip.

2. The LED lamp unit of claim 1, wherein the central recess part has a V-shape.

3. The LED lamp unit of claim 1, wherein the central recess part of the optical lens has a flat surface or a curved surface.

4. The LED lamp unit of claim 1, further comprising an upper reflecting sheet on an upper surface of the optical lens.

5. The LED lamp unit of claim 4, wherein the upper reflecting sheet is formed by adhesion of a reflecting sheet, by coating of a reflecting material, or by processing a surface with a functional sheet.

6. The LED lamp unit of claim 1, further comprising a light-absorbing film or a light-scattering film on the upper surface of the optical lens.

7. The LED lamp unit of claim 6, wherein the light-absorbing film is formed of a black sheet.

8. The LED lamp unit of claim 6, wherein the light-scattering film may be formed in a method of roughing a surface of a film, or in a method of coating irregular particles on a surface of a film.

9. The LED lamp unit of claim 1, wherein, in state both ends in each of the LED chips are connected with each of anode electrode terminals and each of cathode electrode terminals by lead, the anode electrode terminals of the LED chips are separately connected, and the cathode electrode terminals of the LED chips are separately connected.

10. The LED lamp unit of claim 1, wherein, in state both ends in each of the LED chips are connected with each of anode electrode terminals and each of cathode electrode terminals by lead, the anode electrode terminals of the LED chips are separately connected, and the cathode electrode terminals of the LED chips are connected in common by a first electrode connection wire.

11. The LED lamp unit of claim 1, wherein, in state both ends in each of the LED chips are connected with each of anode electrode terminals and each of cathode electrode terminals by lead, the anode electrode terminals of the LED chips are connected in common by a second electrode connection wire, and the cathode electrode terminals of the LED chips are separately connected.

12. The LED lamp unit of claim 1, wherein, in state both ends in each of the LED chips are connected with each of anode electrode terminals and each of cathode electrode terminals by lead, the anode electrode terminals of the LED chips are connected in common by the second electrode connection wire, and the cathode electrode terminals of the LED chips are connected in common by the first electrode connection wire.

13. The LED lamp unit of claim 1, wherein the LED chips emit monochromatic light, tri-chromatic light of R, G and B, or white light.

14. An LED lamp unit comprising:

an optical lens having an edge in shape of a flat surface or in shape of a convex lens;

a plurality of LED chips arranged at fixed intervals in a lower portion of the optical lens;

a lower reflecting sheet positioned on a bottom surface of the optical lens and the LED chips; and

an upper reflecting sheet positioned on an upper surface of the optical lens.

15. The LED lamp unit of claim 14, wherein the upper surface, on which the upper reflecting sheet is positioned, is formed as a flat surface.

16. The LED lamp unit of claim 14, wherein the upper reflecting sheet is formed by adhesion of a reflecting sheet, by coating of a reflecting material, or by processing a surface with a functional sheet.

17. The LED lamp unit of claim 14, wherein, in state both ends in each of the plurality of LED chips are connected with each of anode electrode terminals and each of cathode electrode terminals by lead, the anode electrode terminals of the plurality of LED chips are separately connected, and the cathode electrode terminals of the plurality of LED chips are separately connected.

18. The LED lamp unit of claim 14, wherein, in state both ends in each of the plurality of LED chips are connected with each of anode electrode terminals and each of cathode electrode terminals by lead, the anode electrode terminals of the plurality of LED chips are separately connected, and the cathode electrode terminals of the plurality of LED chips are connected in common by a first electrode connection wire.

19. The LED lamp unit of claim 14, wherein, in state both ends in each of the plurality of LED chips are connected with each of anode electrode terminals and each of cathode electrode terminals by lead, the anode electrode terminals of the plurality of LED chips are connected in common by a second electrode connection wire, and the cathode electrode terminals of the plurality of LED chips are separately connected.

20. The LED lamp unit of claim 14, wherein, in state both ends in each of the plurality of LED chips are connected with each of anode electrode terminals and each of cathode electrode terminals by lead, the anode electrode terminals of the plurality of LED chips are connected in common by the second electrode connection wire, and the cathode electrode terminals of the plurality of LED chips are connected in common by the first electrode connection wire.

21. The LED lamp unit of claim 14, wherein the LED chips emit monochromatic light, tri-chromatic light of R, G and B, or white light.

22. An LED lamp unit comprising:

an optical lens having an edge in shape of a flat surface or in shape of a convex lens;

a plurality of LED chips arranged at fixed intervals in a lower portion of the optical lens;

a lower reflecting sheet positioned on a bottom surface of the optical lens and the LED chips; and

a light-absorbing film or a light-scattering film positioned on an upper surface of the optical lens.

23. The LED lamp unit of claim 22, wherein the light-absorbing film is formed of a black sheet.

24. The LED lamp unit of claim 22, wherein the light-scattering film may be formed in a method of roughing a surface of a film, or in a method of coating irregular particles on a surface of a film.