Bulb type semiconductor light-emitting device lamp

• US 8,956,011 B2
• Filed: 08/29/2012
• Issued: 02/17/2015
• Est. Priority Date: 08/29/2011
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ariyoshi, Tetsuo, Park, Cheon-ho, Yu, Byeong-hyeon, Yun, Ji-hoon
• Primary Examiner(s): NEILS, PEGGY A
• Application Number:
  US13/597,727
• Publication Number:
  US 20130051013A1
• Time in Patent Office: 902 Days
• Field of Search: 362/249.02, 362/294, 362/373, 362/363
• US Class Current: 362/249.02
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• 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 29/74 with fins or blades
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21V 3/10 characterised by coatings
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2224/8592 Applying permanent coating, e.g. protective coating
• 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 2924/19107 off-chip wires

Abstract

A bulb-type semiconductor light-emitting device lamp having wide light distribution characteristics which are similar to those of a typical incandescent bulb is provided. The semiconductor light-emitting device lamp includes: a plurality of light-emitting devices that are arranged such that light is emitted therefrom toward a central axis of the bulb-type semiconductor light-emitting device lamp. Also, the bulb-type semiconductor light-emitting device lamp includes a heat dissipation structure having a plurality of installation surfaces that surround the central axis and are separated from each other, wherein each of the plurality of light-emitting devices includes one or more light-emitting devices.

Claims

1. A bulb-type semiconductor light-emitting device lamp comprising:

a plurality of installation portions;

a plurality of light-emitting devices that are arranged on the plurality of installation portions to emit light toward a central axis of the bulb-type semiconductor light-emitting device lamp; and

a plurality of cover members disposed between the plurality of installation portions, wherein the plurality of installation portions and the plurality of cover members form a bulb shape of the lamp and encapsulate the plurality of light-emitting devices.

2. The bulb-type semiconductor light-emitting device lamp of claim 1, further comprising:

a heat dissipation structure comprising the plurality of installation portions, wherein the plurality of installation portions surround the central axis and are separated from each other,

wherein the plurality of installation portions comprise a plurality of installation surfaces on which one or more light-emitting devices of the plurality of light-emitting devices are arranged along the central axis.

3. The bulb-type semiconductor light-emitting device lamp of claim 2, wherein the plurality of installation surfaces are rotationally symmetric about the central axis.

4. The bulb-type semiconductor light-emitting device lamp of claim 3, wherein a number of the plurality of installation surfaces is an odd number of 3 or more.

5. The bulb-type semiconductor light-emitting device lamp of claim 2, wherein the plurality of installation surfaces do not face each other with respect to the central axis.

6. The bulb-type semiconductor light-emitting device lamp of claim 2, wherein the plurality of installation surfaces are arranged at different intervals with respect to the central axis.

7. The bulb-type semiconductor light-emitting device lamp of claim 2, wherein the plurality of installation surfaces extend in a direction parallel to the central axis.

8. The bulb-type semiconductor light-emitting device lamp of claim 2, wherein the plurality of installation surfaces are inclined at an angle with respect to the central axis.

9. The bulb-type semiconductor light-emitting device lamp of claim 2, wherein the heat dissipation structure further comprises:

a main body; and

a connection portion which connects the main body and the plurality of installation portions,

wherein the plurality of installation portions further comprise exposed surfaces opposite to the plurality of installation surfaces and exposed to an outside of the bulb-type semiconductor light-emitting device lamp, and ends of the plurality of installation portions are connected to each other to form a summit of the bulb shape.

10. The bulb-type semiconductor light-emitting device lamp of claim 9, wherein the exposed surfaces are curved surfaces that constitute a portion of the bulb shape.

11. The bulb-type semiconductor light-emitting device lamp of claim 9, wherein the plurality of cover members are disposed between adjacent installation portions of the plurality of installation portions, and encapsulate an inner space in which the plurality of light-emitting devices are disposed together with the plurality of installation portions.

12. The bulb-type semiconductor light-emitting device lamp of claim 9, wherein the exposed surfaces comprise a heat dissipation pattern which dissipates heat.

13. The bulb-type semiconductor light-emitting device lamp of claim 9, wherein the main body has a heat dissipation pattern which dissipates heat.

14. The bulb-type semiconductor light-emitting device lamp of claim 9, wherein the main body comprises a plurality of heat dissipation fins which dissipate heat.

15. The bulb-type semiconductor light-emitting device lamp of claim 2, wherein a first installation surface, of the plurality of installation surfaces, faces a second installation surface, of the plurality of installation surfaces, with respect to the central axis of the bulb-type semiconductor light-emitting device lamp.

16. The bulb-type semiconductor light-emitting device lamp of claim 9, further comprising a high-reflection coating on at least one of a surface of the main body, surfaces of the plurality of connection portions, and a surface of the installation portion.

17. A bulb-type semiconductor light-emitting device lamp comprising:

a first installation portion comprising a first installation surface provided in a first region of an interior surface of the bulb-type semiconductor light-emitting device lamp;

a first light-emitting device mounted on the first installation surface and configured to emit light toward a second region of the interior surface;

a second installation portion comprising a second installation surface provided in a third region of the interior surface;

a second light-emitting device mounted on the second installation surface and configured to emit light toward a fourth region of the interior surface, and

a cover member disposed between the first and second installation portions, wherein the first and second installation portions and the cover member form a bulb shape of the lamp and encapsulate the first and second light-emitting devices.

18. The bulb-type semiconductor light-emitting device lamp of claim 17, further comprising:

a heat dissipation structure comprising the plurality of installation portions, wherein the plurality of installation portions surround a central axis of the bulb-type semiconductor light-emitting device lamp and are separated from each other.

19. The bulb-type semiconductor light-emitting device lamp of claim 18, wherein the first installation surface faces the second installation surface.