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US 2004/0057252 A1Published application
Replaceable LED bulb with interchageable lens optic
AssigneeOsram Sylvania Inc.
InventorCharles M. Coushaine
Life of this patent
Estimating the term…
Abstract
LED lamp assembly particularly adapted for automotive applications that utilizes one or more standard replaceable LED bulbs with changeable optics to make multiple beam patterns. Preferably the optic is molded and easily replaced. An electric module is mounted directly under the LED to facilitate the electrical connection and provide good thermal contact. The LED light source(s) and interchangeable optic are positioned and sealed in the base of a main reflector or the vehicle hull by means well known to those skilled in the art.
Claims19
A lamp assembly, comprising:
- a replaceable base;
- one or more LED light sources supported on said base, said one or more LED light sources each adapted to emit light in a predetermined, substantially forward direction;
- an optic supported from said base and over said LED light sources and oriented with respect to said one or more LED light sources so as to intercept said light emanating from said one or more LED light sources and direct the same in a predetermined pattern.
An automotive lamp assembly comprising:
- a main reflector generally having the form of a shell defining an enclosed volume, and having a reflective interior surface generally facing in a forward axial direction towards an opening, the main reflector having an optical depth being the maximal distance along the axis between transverse planes intercepting the reflective surface;
- and having a reflector radius being the maximal distance transverse to the axis from the axis to the reflective surface;
- wherein the ratio R of the optical radius to the optical depth is greater than 2;
- one or more LEDs positioned within the enclosed volume and about the axis to generally face in the forward direction;
- and
- an intermediate reflector, located along the axis forward of the one or more LEDs, the intermediate reflector having a reflective surface, the reflective surface generally facing opposite the forward direction with normals ranging between 0 degrees to 90 degrees with respect to rearward axis.
3 more elements
Dependencies are inferred from the claim text.