LIGHT EMITTING DEVICE

• US 20140362565A1
• Filed: 06/10/2014
• Published: 12/11/2014
• Est. Priority Date: 06/11/2013
• Status: Active Grant

• Current Assignee: Epistar Corporation
• Original Assignee: Epistar Corporation
• Inventors: YAO, Chiu-Lin, HSIEH, Min-Hsun, LIAW, Been-Yu, HSU, Ming-Chi, HU, Wei-Chiang, LAI, Po-Hung, LIU, Chun-Hung, LIAO, Shih-An, SUNG, Yu-His
• Granted Patent: US 9,664,340 B2
• Time in Patent Office: Days
• US Class Current: 362/223
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/235 Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps F21K9/238 takes precedence
• CPC Class Codes: F21Y 2107/10 on concave supports or substrates, e.g. on the inner side of bowl-shaped supports
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/16225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/32225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/49107 on the semiconductor or solid-state body
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• 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 2924/00014 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 33/54 having a particular shape
• 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

This disclosure discloses a light-emitting device. The light-emitting device comprises: a first electrode part; a second electrode part; a third electrode part, spaced apart from the first electrode part and the second electrode part; and a light-emitting unit partially covering the first electrode part and the second electrode part and fully covering the second electrode part, the light-emitting unit having a conductive structure contacting the second electrode part.

Claims

1. An light-emitting device, comprising:

a first electrode part;

a second electrode part;

a third electrode part, spaced apart from the first electrode part and the second electrode part; and

a light-emitting unit partially covering the first electrode part and the second electrode part and fully covering the second electrode part, the light-emitting unit having a conductive structure contacting the second electrode part.

2. The light-emitting device of claim 1, wherein the conductive structure does not contact the first electrode part and the third electrode part.

3. The light-emitting device of claim 1, wherein the light-emitting unit further comprises a first light-emitting diode and a second light-emitting diode, and the first light-emitting is connected to the second light-emitting diode through the conductive structure.

4. The light-emitting device of claim 1, wherein the light-emitting unit further comprises a first transparent structure covering the first light-emitting diodes and the second light-emitting diode.

5. The light-emitting device of claim 1, wherein the light-emitting unit further comprises a connecting pad partially covering the first electrode part.

6. The light-emitting device of claim 1, wherein the light-emitting unit further comprises a first light-emitting diode and a second light-emitting diode, and wherein the first electrode part merely contacts the first light-emitting diode the second part contacts the first light-emitting diode and the second light-emitting diode, and the third electrode part merely contacts the second light-emitting diode.

7. The light-emitting device of claim 1, wherein the light-emitting unit further comprises a first transparent structure that partially covers the first electrode part and the third electrode part, and fully covers the second electrode part.

8. The light-emitting device of claim 7, further comprising a protective layer formed between the conductive structure and the first transparent structure.

9. The light-emitting device of claim 1, further comprising a carrier and a transparent layer, wherein the light-emitting unit is formed on the carrier and the transparent layer covers the light-emitting unit;

and a longest distance between the transparent layer and the carrier is H₁; and

the light-emitting unit has a height (H₂);

H₂≧

0.5H₁.

10. The light-emitting device of claim 1, further comprising a transparent layer fully covering the light-emitting unit and the second electrode part and partially covering the first electrode part.

11. A light-emitting tube comprising (filament tube):

a cover having a first end;

a light-emitting device, enclosed by the cover, having two electrode pads exposed from the first end of the cover; and

a transparent substance formed between the light-emitting device and the cover.

12. The light-emitting tube of claim 11, wherein the cover comprises diamond, glass, epoxy, quartz, acrylic resin, SiO_x, Al₂O₃, ZnO or silicone.

13. The light-emitting tube of claim 11, wherein the transparent substance includes silicone, epoxy, polyimide (PI), BCB, perfluorocyclobutane (PFCB), SU8, acrylic resin, polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), polycarbonate (PC), polyetherimide, fluorocarbon polymer, Al₂O₃, SINR, spin-on-glass (SOG).

14. The light-emitting tube of claim 11, wherein the light-emitting device further comprises:

a carrier having a top surface and a bottom surface opposite to the top surface; and

a light-emitting unit arranged on the top surface.

15. The light-emitting tube of claim 14, wherein the two electrode pads are formed on the top surface.

16. The light-emitting tube of claim 14, wherein the two electrode pads are formed on the same side of the carrier.

17. The light-emitting tube of claim 11, wherein the transparent substance comprises a wavelength conversion material.