Light emitting apparatus, method for manufacturing the light emitting apparatus, electronic device and cell phone device

• US 8,288,936 B2
• Filed: 06/05/2008
• Issued: 10/16/2012
• Est. Priority Date: 06/05/2007
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Takenaka, Yasuji, Ohta, Masayuki, Konishi, Masahiro
• Primary Examiner(s): Santiago, Mariceli
• Assistant Examiner(s): RALEIGH, DONALD L
• Application Number:
  US12/134,047
• Publication Number:
  US 20080303411A1
• Time in Patent Office: 1,594 Days
• Field of Search: 257/40, 257/72, 257 98-100, 257642-643, 257/759, 313498-512, 313110-117, 315/169.1, 315/169.3, 427/58, 427/64, 427/66, 427532-535, 427/539, 428690-691, 428/917, 438 26- 29, 438/34, 438/82, 445 24- 25
• US Class Current: 313/503
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/0883 Arsenides; Nitrides; Phosphides
• CPC Class Codes: C09K 11/77342 Silicates
• CPC Class Codes: H01L 2224/48091 Arched
• 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 2933/0091 Scattering means in or on the semiconductor body or semiconductor body package H01L33/22 takes precedence
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector
• CPC Class Codes: H01L 33/50 Wavelength conversion elements

Abstract

A light emitting apparatus is provided, and the light emitting apparatus has a light emitting device mounted on a substrate or a resin package where a substrate surface or the resin package is resin-encapsulated by an encapsulating resin section added with a phosphor in such a manner to cover the light emitting device. A surface resin layer of a different color from that of the encapsulating resin section is provided on a surface side of the encapsulating resin section.

Claims

1. A light emitting apparatus having a light emitting device mounted on a substrate or a resin package where a substrate surface or the resin package is resin-encapsulated by an encapsulating resin section comprising an encapsulating resin added with a first phosphor in such a manner to cover the light emitting device and configured to control a color of light output by the light emitting apparatus,

wherein a thickness of the encapsulating resin section is configured to balance with a white color of the light emitting apparatus when the light emitting device is not emitting light,

the encapsulating resin section is a translucent mold section, which is divided, from the side closer to the light emitting device, into a layer substantially including the first phosphor, an intermediate layer including the first phosphor, an optical diffusion material and a second phosphor and a layer substantially including the optical diffusion material and the second phosphor that is substantially precipitated to a surface side of the encapsulating resin section, such that the layer substantially including the optical diffusion material and the second phosphor has a different color from that of the layer substantially including the first phosphor, and

a portion of the encapsulating resin section containing the optical diffusion material and the second phosphor is configured to cause a surface of the encapsulating resin section to appear white when the light emitting device is not emitting light.

2. A light emitting apparatus according to claim 1, wherein the light emitting device is a blue color LED.

3. A light emitting apparatus according to claim 1, wherein the first phosphor is a yellow color phosphor or a chromatic color phosphor.

4. A light emitting apparatus according to claim 1, wherein the color of the encapsulating resin added with the first phosphor is yellow.

5. A light emitting apparatus according to claim 1, wherein the optical diffusion material is capable of reflecting a visible light ranging between a blue color and a red color.

6. A light emitting apparatus according to claim 1, wherein a surface of the substrate or a surface of a recess section of the resin package, on which the light emitting device is mounted, is a reflection face.

7. A light emitting apparatus according to claim 1, wherein the substrate is an insulating substrate.

8. A light emitting apparatus according to claim 1,

wherein a plurality of the light emitting devices and the encapsulating resin sections are provided on the substrate as light emitting modules.

9. A light emitting apparatus according to claim 1, wherein the encapsulating resin section further includes, on the side farthest from the light emitting device, a layer with only the encapsulating resin.

10. A light emitting apparatus according to claim 1, wherein the first and second phosphors and the optical diffusion material are selected to have specific gravities greater than the specific gravity of a resin material for an encapsulating resin section that includes the first and second phosphors and the optical diffusion material.

11. A light emitting apparatus according to claim 1, wherein the first phosphor is selected to have a specific gravity greater than the specific gravity of the optical diffusion material and the second phosphor.

12. A light emitting apparatus according to claim 1, wherein the optical diffusion material is composed of inorganic fine particles.

13. A light emitting apparatus according to claim 1, wherein a material for the encapsulating resin is any one of solventless liquid translucent thermosetting resin, solvent liquid translucent thermosetting resin, and solvent liquid translucent thermoplastic resin.

14. An electronic device equipped with a camera and the light emitting apparatus according to claim 1 as camera lighting.

15. A cell phone device equipped with a camera and the light emitting apparatus according to claim 1 as camera lighting.

16. A cell phone device according to claim 15, wherein a transparent cover is provided for a surface side of the light emitting apparatus.