LIGHTING APPARATUS

• US 20170211749A1
• Filed: 04/07/2017
• Published: 07/27/2017
• Est. Priority Date: 10/15/2014
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Materials Company Limited (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Materials Company Limited (Toshiba Corporation)
• Inventors: HAYASHIHARA, Hiromichi, KONDO, Hiroyasu, TSUDA, Ryoji, OOYA, Yasumasa, OHNO, Hiroshi, KATO, Mitsuaki
• Granted Patent: US 10,107,457 B2
• Time in Patent Office: Days
• 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 9/61 using light guides
• CPC Class Codes: F21S 2/00 Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
• CPC Class Codes: F21V 7/24 characterised by the material
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting apparatus according to an embodiment includes a globe, an optical element including a scattering portion inside and transparent to visible light, and a light source disposed to be opposed to a light incident surface of the optical element. The scattering portion is disposed inside the globe.

Claims

1. :

A lighting apparatus comprising;

a globe;

an optical element including inside a scattering portion extending along an axis, a transparent portion outside the scattering portion, and a light incident surface at an end along the axis; and

a light source disposed to be opposed to the light incident surface of the optical element,

wherein the scattering portion is disposed inside the globe.

2. :

The lighting apparatus of claim 1, wherein

the optical element has a rotation-symmetrical shape,

the globe has a rotation-symmetrical shape, and

a first rotation-symmetrical axis serving as the axis of the optical element agrees with a second rotation-symmetrical axis of the globe.

3. :

The lighting apparatus of claim 1, wherein the scattering portion is disposed opposite to the light source with respect to center of the globe.

4. :

The lighting apparatus of claim 3, wherein an end portion of the scattering portion on the light source side is disposed in the center of the globe.

5. :

The lighting apparatus of claim 1, wherein the scattering portion is disposed in a position including center of the globe.

6. :

The lighting apparatus of claim 5, wherein center of the scattering portion agrees with the center of the globe.

7. :

The lighting apparatus of claim 1, wherein the scattering portion is disposed on the light source side beyond center of the globe.

8. :

The lighting apparatus of claim 7, wherein an end portion of the scattering portion on a side opposite to the light source is disposed in the center of the globe.

9. :

The lighting apparatus of claim 1, wherein

the light source includes an LED device, and

a light emitting surface of the light source is opposed to the light incident surface of the optical element.

10. :

The lighting apparatus according to claim 1, further comprising;

a diffusion portion subjected to surface treatment to diffuse and reflect light, the diffusion portion thermally connected with the light source and disposed inside the globe.

11. :

The lighting apparatus according to claim 1, wherein the globe is of an ordinary bulb type.

12. :

The lighting apparatus according to claim 1, wherein the globe is of a chandelier bulb type.

13. :

The lighting apparatus according to claim 1, wherein the globe is of a ball bulb type.