Light emitting apparatus

• US 20080031009A1
• Filed: 02/22/2007
• Published: 02/07/2008
• Est. Priority Date: 02/22/2006
• Status: Abandoned Application

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Imai, Sadato, Kodaira, Hiroshi, Ishizaka, Mitsunori
• Application Number:
  US11/709,282
• Publication Number:
  US 20080031009A1
• Time in Patent Office: Days
• US Class Current: 362/612
• CPC Class Codes: H01L 2224/45144 Gold (Au) as principal constituent
• CPC Class Codes: H01L 2224/48091 Arched
• 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 33/52 Encapsulations
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

A light emitting apparatus including a board (2), at least one LED element (3) mounted on the board (2), a first resinous sealing member (4) to seal the LED element (3) and having a linear coefficient of expansion, and a second resinous sealing member (5) to cover the first resinous sealing member (4) and having a linear coefficient of expansion, the first resinous sealing member (4) containing a functional additive comprising at least one of a fluorescent material, an inorganic filler, and a diffusing agent, the linear coefficient of expansion of the first resinous sealing member (4) being set to be substantially identical with the linear coefficient of expansion of the second resinous sealing member (5).

Claims

1. A light emitting apparatus, comprising:

a board;

at least one light emitting diode element mounted on the board;

a first resinous sealing member sealing the light emitting diode element and

a second resinous sealing member covering the first resinous sealing member,

respective linear coefficients of expansion of the first resinous member and the second resinous sealing member being set to be substantially identical.

2. The light emitting apparatus according to claim 1, wherein at least one functional additive is contained in the first resinous sealing member.

3. The light emitting apparatus according to claim 2, wherein the functional additive comprises at least one selected from among at least one fluorescent material, at least one inorganic filler and at least one diffusing agent.

4. The light emitting apparatus according to claim 2, wherein the first resinous sealing member contains at least one inorganic filler to enable a fine adjustment of the linear coefficient of expansion.

5. The light emitting apparatus according to claim 1, wherein the first resinous sealing member is made from resin softer than that of the second resinous sealing member.

6. The light emitting apparatus according to claim 1, wherein the first resinous sealing member which is a liquid resin is filled in a space formed by the board and the second resinous sealing member.

7. The light emitting apparatus according to claim 1, wherein the second resinous sealing member includes a collecting lens part disposed to face the light emitting diode element.

8. The light emitting apparatus according to claim 1, wherein the first resinous sealing member and the second resinous sealing member are made from silicon resin.

9. The light emitting apparatus according to claim 2, wherein the light emitting diode element is configured to emit blue light or ultraviolet light,

wherein the at least one functional additive is a fluorescent material to convert the blue light or ultraviolet light into white light.

10. The light emitting apparatus according to claim 1, wherein at least one injection hole to mold the first resinous sealing member is provided in one selected from the second resinous sealing member or the board.