Vehicle interior light assembly with reflector and lens

• US 10,442,350 B2
• Filed: 05/31/2017
• Issued: 10/15/2019
• Est. Priority Date: 05/31/2017
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Chen, Linsheng, Antilla, Steven J.
• Primary Examiner(s): Gyllstrom, Bryon T
• Application Number:
  US15/609,186
• Publication Number:
  US 20180345857A1
• Time in Patent Office: 867 Days
• CPC Class Codes: B60Q 3/60 characterised by optical aspects
• CPC Class Codes: B60Q 3/76 for spotlighting, e.g. reading lamps spotlighting on or for specific fittings B60Q3/20; spotlighting in mass transit vehicles B60Q3/44
• CPC Class Codes: B60Q 3/80 Circuits; Control arrangements for dashboards B60Q3/16; for mass transit vehicles B60Q3/47

Abstract

A light assembly for a vehicle comprises: a light source that emits light; a reflector that reflects the light emitted by the light source to a reflected focal point; and an optical device through which the light emitted by the light source transmits, the optical device having an optical focal point; wherein the optical focal point and the reflected focal point are approximately the same focal point. The light leaving the optical device is directed toward a target illuminance area that allows a driver or passenger of the vehicle to read. The light source is an LED. The optical device is a lens. The reflector is an elliptical reflector. The light assembly further comprises a printed circuit board and the LED is mounted on the printed circuit board.

Claims

1. A vehicle comprising:

an interior;

an overhead console accessible from the interior; and

a light assembly providing light from the overhead console to the interior, the light assembly comprising;

a printed circuit board;

an LED light source that emits the light, the LED light source mounted to the printed circuit board;

an elliptical reflector that reflects the light emitted by the LED light source to a reflected focal point; and

a non-reflective lens having an incident surface and an exit surface, at least one of which is planar, and an optical focal point that is at least approximately the same as the reflected focal point, the light propagating from the reflected focal point directly to the incident surface and through the non-reflective lens;

wherein, the light exiting the non-reflective lens is more collimated not orthogonally to the printed circuit board; and

wherein, a distance between the printed circuit board and the non-reflective lens is 10 millimeters or longer.

2. The vehicle of claim 1 further comprising a seating assembly in the interior, wherein the light assembly directs the light provided by the light assembly toward the seating assembly.

3. A method of configuring components of a light assembly to direct light provided by the light assembly to a target illuminance area within an interior of a vehicle using an LED as a light source of the light assembly without mounting the LED to a satellite board comprising:

mounting an LED on a printed circuit board;

determining dimensions of an elliptical reflector that reflects light that a light source of the LED emits to a reflected focal point that at least approximately coincides with an optical focal point of a non-reflective lens that is a distance 10 millimeters or longer away from the printed circuit board, the non-reflective lens having an incident surface and an exit surface, at least one of which is planar, the light propagating from the reflected focal point directly to the incident surface and through the non-reflective lens;

positioning the elliptical reflector adjacent the LED such that the reflected focal point at least approximately coincides with the optical focal point; and

positioning the non-reflective lens so that light exiting the non-reflective lens is more collimated not orthogonally to the printed circuit board.

4. The method of claim 3, wherein the light directed to the target illuminance area is appropriate for reading.

5. The method of claim 3 wherein the vehicle further comprises an overhead console and the light assembly provides light from the overhead console to the interior.

6. The method of claim 3, wherein the vehicle further comprises a seating assembly in the interior and the target illuminance area is between the seating assembly and the light assembly;

and

wherein the dimensions of the elliptical reflector reflect the light to a reflected focal point that coincides with the optical focal point of the non-reflective lens and the elliptical reflector is positioned adjacent the LED such that the reflected focal point coincides with the optical focal point.