SELF-BALLASTED LAMP AND LIGHTING EQUIPMENT

• US 20100327751A1
• Filed: 06/29/2010
• Published: 12/30/2010
• Est. Priority Date: 06/30/2009
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Hisayasu, Takeshi, Sakai, Mokoto, Osawa, Shigeru, Morikawa, Kazuto, Shibahara, Yusuke, Takenaka, Erika, Sanpei, Tomohiro
• Application Number:
  US12/825,956
• Publication Number:
  US 20100327751A1
• Time in Patent Office: Days
• US Class Current: 315/113
• 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 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21V 23/002 Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The present invention provides a self-ballasted lamp which efficiently conducts heat of a plurality of LED chips of a light emitting module to its holder, and can prevent the temperature rise of the LED chips. The holder has a base portion, an edge portion provided at one end side of the base portion, which is thick at the base portion side thereof and thin at the distal end side thereof, and heat radiation fins provided at the other end side from the edge part and at the circumference of the base portion. The heat from the semiconductor light emitting elements is conducted from the base portion to the edge part and radiated therefrom. At this time, the edge part is thickened at the base portion side, wherein the thermal capacity is increased, and the heat conduction is improved.

Claims

1. A self-ballasted lamp comprising:

a light emitting module having a light emitting portion having a plurality of semiconductor light emitting elements mounted on the surface of one side of a substrate;

a holder which has a base portion, an edge part provided at one end side of the base portion, which is thick at the base portion side and is thin at the distal end side, and heat radiating fins provided at the other end part side of the edge part and at the circumference of the base portion and in which the surface of the other side of the substrate is brought into contact with one end side of the base portion so as to enable heat conduction so that the light emitting portion of the light emitting module is positioned in an area at one end side of the base portion;

a cap provided at the other end side of the holder; and

a lighting circuit accommodated between the base portion of the holder and the cap.

2. The self-ballasted lamp according to claim 1, wherein the edge part is shaped so that one end side surface thereof is flush with the base portion, and the other end side surface thereof is made into a tapered surface.

3. The self-ballasted lamp according to claim 2, wherein the tapered surface of the edge part is linked with the end portion of the heat radiating fins.

4. The self-ballasted lamp according to any one of claim 1, wherein the thermal capacity of the base portion is greater than the heat radiating fins.

5. The self-ballasted lamp according to any one of claim 1, wherein a wiring hole which communicates one edge side of the base portion and the other edge side thereof with each other and enables wiring connection between the light emitting module and the lighting circuit is formed at the holder, and

a relief portion which causes the wiring hole to be opened in a state where the substrate is in contact with the base portion is formed at the substrate of the light emitting module.

6. The self-ballasted lamp according to any one of claim 1, wherein a hole portion which communicates one edge side of the base portion and the other edge side thereof with each other is formed at the holder, and a groove portion is formed on the surface of one edge side of the holder from one edge side of the hole portion toward the surrounding area of the holder is formed, and a wiring hole which enables wiring connection between the light emitting module and the lighting circuit is formed by the hole portion and the groove portion.

7. Lighting equipment comprising:

an equipment main body having a socket; and

a self-ballasted lamp according to any one of claims claim 1 through 6, which is mounted in the socket of the equipment main body.

8. The self-ballasted lamp according to claim 2, wherein the thermal capacity of the base portion is greater than the heat radiating fins.

9. The self-ballasted lamp according to claim 3, wherein the thermal capacity of the base portion is greater than the heat radiating fins.

10. The self-ballasted lamp according to claim 2, wherein a wiring hole which communicates one edge side of the base portion and the other edge side thereof with each other and enables wiring connection between the light emitting module and the lighting circuit is formed at the holder, and

a relief portion which causes the wiring hole to be opened in a state where the substrate is in contact with the base portion is formed at the substrate of the light emitting module.

11. The self-ballasted lamp according to claim 3, wherein a wiring hole which communicates one edge side of the base portion and the other edge side thereof with each other and enables wiring connection between the light emitting module and the lighting circuit is formed at the holder, and

a relief portion which causes the wiring hole to be opened in a state where the substrate is in contact with the base portion is formed at the substrate of the light emitting module.

12. The self-ballasted lamp according to claim 4, wherein a wiring hole which communicates one edge side of the base portion and the other edge side thereof with each other and enables wiring connection between the light emitting module and the lighting circuit is formed at the holder, and

a relief portion which causes the wiring hole to be opened in a state where the substrate is in contact with the base portion is formed at the substrate of the light emitting module.

13. The self-ballasted lamp according to claim 2, wherein a hole portion which communicates one edge side of the base portion and the other edge side thereof with each other is formed at the holder, and a groove portion is formed on the surface of one edge side of the holder from one edge side of the hole portion toward the surrounding area of the holder is formed, and a wiring hole which enables wiring connection between the light emitting module and the lighting circuit is formed by the hole portion and the groove portion.

14. The self-ballasted lamp according to claim 3, wherein a hole portion which communicates one edge side of the base portion and the other edge side thereof with each other is formed at the holder, and a groove portion is formed on the surface of one edge side of the holder from one edge side of the hole portion toward the surrounding area of the holder is formed, and a wiring hole which enables wiring connection between the light emitting module and the lighting circuit is formed by the hole portion and the groove portion.

15. The self-ballasted lamp according to claim 4, wherein a hole portion which communicates one edge side of the base portion and the other edge side thereof with each other is formed at the holder, and a groove portion is formed on the surface of one edge side of the holder from one edge side of the hole portion toward the surrounding area of the holder is formed, and a wiring hole which enables wiring connection between the light emitting module and the lighting circuit is formed by the hole portion and the groove portion.

16. Lighting equipment comprising:

an equipment main body having a socket; and

a self-ballasted lamp according to claim 2, which is mounted in the socket of the equipment main body.

17. Lighting equipment comprising:

an equipment main body having a socket; and

a self-ballasted lamp according to claim 3, which is mounted in the socket of the equipment main body.

18. Lighting equipment comprising:

an equipment main body having a socket; and

a self-ballasted lamp according to claim 4, which is mounted in the socket of the equipment main body.

19. Lighting equipment comprising:

an equipment main body having a socket; and

a self-ballasted lamp according to claim 5, which is mounted in the socket of the equipment main body.

20. Lighting equipment comprising:

an equipment main body having a socket; and

a self-ballasted lamp according to claim 6, which is mounted in the socket of the equipment main body.