Light emitting apparatus and method for the same

• US 8,110,840 B2
• Filed: 07/12/2010
• Issued: 02/07/2012
• Est. Priority Date: 09/12/2006
• Status: Expired due to Fees

• Current Assignee: Mutual-Tek Industries Co., Ltd.
• Original Assignee: Mutual-Tek Undustries Company Limited
• Inventors: Chang, Jung-Chien
• Primary Examiner(s): Lebentritt, Michael
• Application Number:
  US12/834,202
• Publication Number:
  US 20100276718A1
• Time in Patent Office: 575 Days
• Field of Search: 257 89-103, 257/E23.119, 257 33072- 33074
• US Class Current: 257/89
• CPC Class Codes: G02B 5/02 Diffusing elements; Afocal elements
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• 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 2924/181 Encapsulation
• 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 33/52 Encapsulations

Abstract

A light emitting apparatus includes a patterned conductive layer, a light emitting device on the patterned conductive layer, and a first light diffusion layer. The light emitting device and the patterned conductive layer are embedded in the first light diffusion layer. A method of forming such a light emitting apparatus is also disclosed.

Claims

1. A light emitting apparatus, comprising:

a patterned conductive layer;

a light emitting device on the patterned conductive layer; and

a first light diffusion layer covering the light emitting device and the patterned conductive layer, wherein the light emitting device and the patterned conductive layer are embedded in the first light diffusion layer,

wherein the first light diffusion layer further includes at least one light diffusion particle therein and the light diffusion particle comprises a material selected from a group consisting of TiO2, SiO2, acrylate resin, polystyrene, and the combination thereof.

2. The apparatus according to claim 1, further comprising a light-transparent layer between the first light diffusion layer and the light emitting device, wherein the light-transparent layer covers the light emitting device so that the light emitting device is embedded in the light-transparent layer.

3. The apparatus according to claim 2, wherein the patterned conductive layer is embedded in the light-transparent layer.

4. The apparatus according to claim 2, wherein the light-transparent layer is an arc shape structure or a wave shape structure.

5. The apparatus according to claim 2, wherein the light-transparent layer comprises a material selected from a group consisting of epoxy, silicone, acrylic resin, and fluorinated resin.

6. The apparatus according to claim 1, wherein the first light diffusion layer is formed with a rough surface.

7. The apparatus of claim 1, wherein the first light diffusion layer comprises a material selected from a group consisting of polycarbonate, acrylate resin, copolymer of methyl acrylate and styrene, cyclic olefin copolymer, poly ethylene terephthalate and polystyrene.

8. The apparatus of claim 1, further comprising a prism layer covering the first light diffusion layer.

9. The apparatus of claim 8, wherein the prism layer comprises a material selected from a group consisting of polycarbonate, acrylate resin, copolymer of acrylate and styrene, cyclic olefin copolymer, poly ethylene terephthalate and polystyrene.

10. The apparatus of claim 8, further comprising a second light diffusion layer between the prism layer and the first light diffusion layer.

11. The apparatus of claim 10, wherein the second light diffusion layer comprises a material selected from a group consisting of TiO2, SiO2, acrylate resin, polystyrene.

12. The apparatus of claim 1, further comprising an electronic device on the patterned conductive layer and embedded in the first light diffusion layer, wherein the electronic device is configured to control the light emitting device.

13. The apparatus of claim 1, further comprising a heat dissipation element contacting an exposed surface of the patterned conductive layer.