Lighting device for optimized light distribution

• US 10,649,125 B2
• Filed: 05/24/2016
• Issued: 05/12/2020
• Est. Priority Date: 07/29/2015
• Status: Active Grant

• Current Assignee: SMR Patents Sarl (SMR Patents)
• Original Assignee: SMR Patents Sarl (SMR Patents)
• Inventors: Schmidt, Oliver
• Primary Examiner(s): Truong, Bao Q
• Application Number:
  US15/748,569
• Publication Number:
  US 20180203176A1
• Time in Patent Office: 1,449 Days
• CPC Class Codes: B60Q 3/258 Rear-view mirrors
• CPC Class Codes: F21S 43/13 characterised by the type of light source
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21S 43/236 characterised by the shape of the light guide
• CPC Class Codes: F21S 43/237 rod-shaped
• CPC Class Codes: F21S 43/245 emitting light from one or more of its major surfaces
• CPC Class Codes: G02B 6/0003 the light guides being doped with fluorescent agents

Abstract

A lighting device installed in a vehicle for optimized light distribution includes a substrate having quantum dots which are adapted to emit light, a reflecting layer which may be arranged on the bottom side of the substrate, and a transparent layer which may be arranged on the top side of the substrate.

Claims

1. A lighting device for use in an automotive environment and configured to be installed in a vehicle for optimized light distribution, the lighting device comprising:

a substrate comprising quantum dots which are adapted to emit light, essentially uniform in size and shape, and comprise semiconductor nanocrystals having at least one dimension smaller than 100 nanometers;

a reflecting layer arranged on a bottom side of the substrate; and

a transparent layer arranged on a top side of the substrate, wherein

at least one of the reflecting layer and/or the transparent layer has electroconductive properties.

2. The lighting device of claim 1, wherein the substrate comprises a substantially non-planar shape.

3. The lighting device of claim 1, wherein the substrate is flexible.

4. The lighting device of claim 1, further comprising a light source that is adapted to excite the quantum dots of the substrate.

5. The lighting device of claim 4, wherein the substrate is at least one of

part of the light source, and

arranged in a housing of the light source.

6. The lighting device of claim 4, wherein the light source is part of the substrate comprising the quantum dots.

7. The lighting device of claim 1, further comprising a power source that is adapted to excite the quantum dots of the substrate.

8. A rear view mirror for a vehicle comprising the lighting device of claim 1.