Light-emitting diode

• US 20060001030A1
• Filed: 07/05/2005
• Published: 01/05/2006
• Est. Priority Date: 07/05/2004
• Status: Active Grant

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Okuwaki, Daisaku, Shimura, Takashi
• Granted Patent: US 7,345,318 B2
• Time in Patent Office: Days
• US Class Current: 257/79
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• 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

Abstract

An LED comprising a circuit board, a connecting electrode unit provided on the circuit board, a reflective cup provided within the circuit board, an LED element disposed in the reflective cup and connected to the connecting electrode unit, and a resin with which the reflective cup is filled, a fluorescent material contained in the resin absorbing one portion of light emitted from the LED element and changing the wavelength of the light.

Claims

1. A light-emitting diode, comprising:

a circuit board;

a connecting electrode unit provided within the circuit board;

at least one reflective cup provided within the circuit board;

at least one light-emitting diode element disposed in the reflective cup and electrically connected to the connecting electrode unit; and

a resin with which the reflective cup is filled,

a fluorescent material contained in the resin filled in the reflective cup and converting one portion of light emitted from the light-emitting diode element.

2. The light-emitting diode according to claim 1,

wherein the connecting electrode unit includes at least one pair of wiring patterns provided on the upper surface of the circuit board and at least one pair of connecting terminals provided on the lower surface of the circuit board and connected to the wiring patterns.

3. The light-emitting diode according to claim 1,

wherein the connecting electrode unit includes at least one electronic parts connected to the wiring patterns.

4. The light-emitting diode according to claim 3,

wherein the electronic parts is a resistor or a capacitor.

5. The light-emitting diode according to claim 1,

wherein the reflective cup has a truncated-pyramid-shaped or truncated-cone-shaped concave portion.

6. The light-emitting diode according to claim 5,

wherein the concave portion includes a reflecting surface having a straight or curved shape in section.

7. The light-emitting diode according to claim 6,

wherein a metal coating containing Al, Ag, or Ni forms the reflecting surface.

8. The light-emitting diode according to claim 2,

further comprising a translucent resin disposed on the circuit board to cover the upper surface of the reflective cup filled with the resin containing the fluorescent material and the wiring patterns.

10. The light-emitting diode according to claim 1,

further comprising at least one lens disposed to face the light-emitting diode element.

11. The light-emitting diode according to claim 10,

wherein the lens includes a convex lens or a Fresnel lens.

12. The light-emitting diode according to claim 8,

further comprising at least one optical sheet disposed on the translucent resin.

13. The light-emitting diode according to claim 12,

wherein the optical sheet includes at least one prismatic sheet or diffusion sheet.

9. An assemblage light-emitting diode, comprising:

a circuit board;

at least one pair of wiring patterns provided on the circuit board;

a plurality of reflective cups provided in the circuit board;

at least one light emitting diode element disposed in each of the reflective cups and electrically connected to the wiring patterns respectively; and

a resin with which each of the reflective cups is filled,

a fluorescent material contained in the resin filled in each of the reflective cups and converting one portion of light emitted from the light-emitting diode element.