Light-emitting device

• US 9,825,012 B2
• Filed: 11/05/2015
• Issued: 11/21/2017
• Est. Priority Date: 08/15/2012
• Status: Active Grant

• Current Assignee: Epistar Corporation
• Original Assignee: Epistar Corporation
• Inventors: Hsieh, Min Hsun
• Primary Examiner(s): Mondt, Johannes P
• Application Number:
  US14/933,816
• Publication Number:
  US 20160056134A1
• Time in Patent Office: 747 Days
• Field of Search: None
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21W 2121/00 Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/04105 Bonding areas formed on an encapsulation of the semiconductor or solid-state body, e.g. bonding areas on chip-scale packages
• CPC Class Codes: H01L 2224/13 of an individual bump connector
• CPC Class Codes: H01L 2224/24137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 24/24 of an individual high density interconnect connector
• CPC Class Codes: H01L 24/82 by forming build-up interconnects at chip-level, e.g. for high density interconnects [HDI] interconnection structure between a plurality of semiconductor chips H01L23/5389
• 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 2924/12041 LED
• CPC Class Codes: H01L 33/385 the electrode extending at least partially onto a side surface of the semiconductor body
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

A light-emitting device of an embodiment of the present application comprises light-emitting units; a transparent structure having cavities configured to accommodate at least one of the light-emitting units; and a conductive element connecting at least two of the light-emitting units.

Claims

1. A light-emitting device, comprising:

a plurality of light-emitting units, each comprising a substrate, a first electrode, a second electrode, a lateral surface, and a bottom surface, wherein the first electrode and the second electrode are disposed on a top surface opposite to the bottom surface, and each substrate is separated from an adjacent substrate;

a transparent structure covering the lateral surface and the bottom surface of each of the plurality of light-emitting units;

a reflective layer arranged on the transparent structure; and

a conductive element arranged on the reflective layer, connecting at least two of the plurality of light-emitting units;

wherein the conductive element is higher than the first electrode on an entire region between adjacent light-emitting units in a cross-sectional view.

2. The light-emitting device of claim 1, wherein the transparent structure comprises a protrusion corresponding to one of the plurality of light-emitting units.

3. The light-emitting device of claim 1, further comprising a supporting structure formed on a surface of the transparent structure opposite to the topmost surface.

4. The light-emitting device of claim 3, wherein the supporting structure comprises one or more transparent materials.

5. The light-emitting device of claim 3, wherein the supporting structure has a hardness greater than that of the transparent structure.

6. The light-emitting device of claim 3 wherein the supporting structure has a thickness between 100 μ

m and 700 μ

m.

7. The light-emitting device of claim 3, wherein the supporting structure has an upper surface which is opposite to the topmost surface and has a plurality of protrusions.

8. The light-emitting device of claim 3, wherein the supporting structure comprises a protrusion corresponding to one of the plurality of light-emitting units.

9. The light-emitting device of claim 1, wherein the reflective layer on the transparent structure extends between two of the plurality of light-emitting units.

10. The light-emitting device of claim 1, further comprising a first terminal and a second terminal which are arranged on one end of the transparent structure.

11. The light-emitting device of claim 1, further comprising a first wavelength converting material disposed between the transparent structure and one of the plurality of light-emitting units.

12. The light-emitting device of claim 11, further comprising a second wavelength converting material disposed between the transparent structure and another one of the plurality of light-emitting units, wherein the second wavelength converting material is different from the first wavelength converting material.

13. The light-emitting device of claim 1, further comprising a tube inside which the transparent structure and the light-emitting units are arranged.

14. The light-emitting device of claim 13, wherein the light-emitting units comprises an emanating side parallel to a central axis of the tube.

15. The light-emitting device of claim 13, wherein the light-emitting units comprises an emanating side perpendicular to a central axis of the tube.

16. The light-emitting device of claim 13, wherein the tube is filled with air, a transparent material, or both thereof.

17. The light-emitting device of claim 13, further comprising a wavelength converting material formed in the tube.

18. The light-emitting device of claim 17, wherein the shape of the tube comprises blade shape, flower shape, branch shape, vein shape, cylinder shape, U-shape, or arc shape.