LIGHTING APPARATUS

• US 20160258592A1
• Filed: 08/05/2015
• Published: 09/08/2016
• Est. Priority Date: 03/04/2015
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: ONO, Reiji
• Application Number:
  US14/819,022
• Publication Number:
  US 20160258592A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 11/14 with many small apertures
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 3/049 Patterns or structured surfaces for diffusing light, e.g. frosted surfaces
• 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 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G03B 21/10 Projectors with built-in or built-on screen
• CPC Class Codes: G09B 27/04 Star maps
• CPC Class Codes: G09B 27/06 Celestial globes
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

A lighting apparatus includes an LED, a diffusion member, and a light shielding member. The diffusion member is disposed so as to at least partially cover the LED and diffuses light emitted from the LED. The light shielding member is disposed so as to at least partially cover the diffusion member and is provided with a plurality of pinholes through which light diffused by the diffusion member is transmitted. In some example embodiments, the light apparatus can be a planetarium apparatus for projecting star images such as constellations or the like.

Claims

1. A lighting apparatus, comprising:

a light emitting diode;

a diffusion member at least partially covering the light emitting diode and configured to diffuse light emitted from the light emitting diode; and

a light shielding member that at least partially covers the diffusion member and is provided with a plurality of pinholes through which light diffused by the diffusion member is transmitted.

2. The lighting apparatus according to claim 1, wherein the diffusion member has an outer surface that is a portion of a sphere.

3. The lighting apparatus according to claim 2, wherein the outer surface of the diffusion member is a hemisphere.

4. The lighting apparatus according to claim 2, wherein the outer surface of the diffusion member is more than one half of the sphere.

5. The lighting apparatus according to claim 4, further comprising:

a base plate that supports the light emitting diode and the diffusion member, wherein

a region of the base plate contacting the diffusion member has a hydrophobic surface.

6. The lighting apparatus according to claim 1, wherein the diffusion member includes a plurality of protrusion portions and has a star-shape profile when viewed along at least one direction.

7. The lighting apparatus according to claim 1, wherein the pinholes in the plurality of pinholes are provided at positions corresponding to positions of stars.

8. The lighting apparatus according to claim 1, wherein the diffusion member includes a plurality of phosphors that absorb light emitted at a wavelength of light emitted by the light emitting diode and emit light at a different wavelength.

9. The lighting apparatus according claim 1, further comprising:

a base table having a support surface that supports the light emitting diode, the diffusion member, and the light shielding member, wherein

light from the light emitting diode is transmitted through the light shielding member in a direction parallel to the support surface.

10. The lighting apparatus according to claim 1, wherein the lighting apparatus is in a planetarium.

11. A planetarium apparatus, comprising:

a light emitting diode element mounted on a substrate including wiring and electrodes for providing electrical power to the light emitting diode;

a diffusion member that is translucent at a wavelength of light emitted by the light emitting diode, the diffusion member disposed on the substrate and covering the light emitting diode; and

a constellation plate covering the diffusion member and including a blocking portion, which is opaque to light at a wavelength of light output from the diffusion member, and a plurality of transparent portions in the blocking portion, the transparent portions being at least partially transparent to the wavelength of light output from the diffusion member.

12. The planetarium apparatus of claim 11, wherein the transparent portions in the blocking portion are at positions corresponding to star positions.

13. The planetarium apparatus of claim 11, wherein the diffusion member is a dome shape.

14. The planetarium apparatus of claim 11, wherein the diffusion member is a hemispherical shape.

15. The planetarium apparatus of claim 11, wherein the diffusion member is a shape that is less than a full sphere, but greater than a hemisphere.

16. The planetarium apparatus of claim 11, wherein the diffusion member includes a plurality of protrusion portions and has a star shape when viewed from at least one direction.

17. The planetarium apparatus of claim 11, wherein the diffusion member includes a phosphor which absorbs light at the wavelength emitted by the light emitting diode and outputs light at a different wavelength.

18. The planetarium apparatus of claim 11, wherein the constellation plate is cylindrical.

19. A method of making a lighting apparatus, comprising:

mounting a light emitting diode on a substrate;

causing the substrate to have a hydrophobic surface; and

forming a diffusion member having a partial spherical outer surface to cover the light emitting diode mounted on the substrate by putting a resin having a contact angle, with respect to hydrophobic surface of the substrate, that is greater than 90 degrees on the light emitting diode mounted on the substrate, and then curing the resin.

20. The method of claim 19, further comprising:

placing a light shielding member over the diffusion member, the light shielding member having an opaque portion, which blocks light from the diffusion member, and a plurality of transparent portions, which transmit light output from the diffusion member, wherein positions of the transparent portions in the light shielding member correspond to star positions.