LIGHTING DEVICE

• US 20110266939A1
• Filed: 05/03/2010
• Published: 11/03/2011
• Est. Priority Date: 05/03/2010
• Status: Active Grant

• Current Assignee: Young Lighting Technology Inc. (Coretronic Corporation)
• Original Assignee: Young Lighting Technology Corporation
• Inventors: Custodis, Udo, Hwang, Jung-Min, Wang, Wei-Chih
• Granted Patent: US 8,482,186 B2
• Time in Patent Office: Days
• US Class Current: 313/116
• 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: F21V 3/02 characterised by the shape
• 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: G02B 6/0016 Grooves, prisms, gratings, scattering particles or rough surfaces
• CPC Class Codes: G02B 6/0096 the lights guides being of the hollow type

Abstract

A lighting device includes a light guide body and at least one light-emitting unit. The light guide body has a light guide channel and a local roughened surface on the light guide channel as a scattering region. The at least one light-emitting unit is capable of emitting a light into the light guide channel, wherein at least one portion of the light is guided to the scattering region, and the scattering region scatters the light as a local light source region.

Claims

1. A lighting device, comprising:

a light guide body, having a light guide channel and a local roughened surface on the light guide channel as a scattering region; and

at least one light-emitting unit capable of emitting a light into the light guide channel, wherein at least one portion of the light is guided to the scattering region, and the scattering region scatters the light as a local light source region.

2. The lighting device of claim 1, wherein the light guide body has an outer surface to serve as the light guide channel, and the portion of the light is guided within the light guide body by the outer surface.

3. The lighting device of claim 1, wherein the light guide body has a concave channel to server as the light guide channel, the portion of the light is capable of entering the concave channel and is guided within the light guide body.

4. A lighting device, comprising:

a light guide body, having an indenting part with a roughened surface thereon or a protruding part with a roughened surface thereon to serve as a scattering region;

at least one light-emitting unit capable of emitting a light into the light guide body, wherein at least one portion of the light is guided within the light guide body and reaches to the scattering region, and the scattering region scatters the light as a local light source region; and

a cap, covering over the light guide body, wherein the local light source region is within the cap.

5. The lighting device of claim 4, wherein the light guide body is a bar structure, a round cone-like structure, a polygon cone-like structure, or a curving surface structure.

6. The lighting device of claim 4, wherein the light guide body has a first end region and a second end region, the scattering region is at the first end region, and the at least one light-emitting unit is at the second end region.

7. The lighting device of claim 6, wherein a transverse cross-sectional area of the first end region is smaller than a transverse cross-sectional area of the second end region.

8. The lighting device of claim 4, wherein the at least one light-emitting unit comprises a light emitting diode.

9. The lighting device of claim 4, wherein the roughened surface is a forested-like surface.

10. A lighting device, comprising:

a light guide body, having a concave channel and a local roughened surface on the light guide body to serve as a scattering region in connection with the concave channel;

at least one light-emitting unit capable of emitting a light into the concave channel, wherein at least one portion of the light is guided within the concave channel and reaches to the scattering region, and the scattering region scatters the light as a local light source region,

wherein the light guide body with the concave channel covers over the at least one light-emitting unit.

11. The lighting device of claim 10, wherein the concave channel is a uniform columnar space, a round cone-like space, a polygon cone-like space, or a curving surface space.

12. The lighting device of claim 10, wherein the concave channel has a first end region and a second end region, the scattering region is at the first end region, and the at least one light-emitting unit is at the second end region.

13. The lighting device of claim 12, wherein a transverse cross-sectional area of the first end region is smaller than a transverse cross-sectional area of the second end region.

14. The lighting device of claim 10, wherein the at least one light-emitting unit comprises a light emitting diode.

15. The lighting device of claim 10, wherein the roughened surface of the scattering region is a forested-like surface.