Light emitting diode lighting with frustoconical reflector

• US 6,464,373 B1
• Filed: 11/03/2000
• Issued: 10/15/2002
• Est. Priority Date: 11/03/2000
• Status: Expired due to Fees

• Current Assignee: TWR Lighting, Inc.
• Original Assignee: TWR Lighting, Inc.
• Inventors: Petrick, John T.
• Primary Examiner(s): O'Shea, Sandra
• Assistant Examiner(s): DELGIZZI, RONALD ERNEST
• Application Number:
  US09/704,592
• Time in Patent Office: 711 Days
• Field of Search: 362/235, 362/247, 340/815.45, 340/815.75
• US Class Current: 362/235
• CPC Class Codes: F21S 10/06 flashing, e.g. with rotating reflector or light source signalling lighting devices mounted on vehicles B60Q1/26
• CPC Class Codes: F21V 11/14 with many small apertures
• CPC Class Codes: F21V 7/0008 providing for indirect lighting
• CPC Class Codes: F21V 7/041 with conical or pyramidal surface
• CPC Class Codes: F21W 2111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
• CPC Class Codes: F21W 2111/06 for aircraft runways or the like
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 25/13 the devices being of a type provided for in group H01L33/00
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

A light emitting diode lighting system comprising a plate having an exterior periphery and a central generally circular attachment zone of a reduced circumference. The plate has an upper surface with a plurality of mounting areas thereon. The mounting areas include a plurality of mounting areas in a generally circular exterior array adjacent to the exterior periphery and a generally circular interior array around the attachment zone and at least one circular intermediate arrays there between. A plurality of light emitters have light emitting upper areas and with lower areas formed with electrical leads for illuminating the upper areas with intermediate securement means there between. Each of the light emitters is secured within an associated mounting area on the plate. A reflector is in a generally truncated cone-shaped configuration with a central axis perpendicular to the plate and a generally circular smaller end of a reduced circumference positioned within the attachment zone of the circular plate and with a generally circular upper end of an enlarged circumference positioned above the plate. An intermediate surface is there between. The intermediate surface of the reflector has a continually diminishing circumference from its upper end to its lower end and is located entirely above the light emitters and with the reflector and plate having a common axis there through.

Claims

1. A light emitting diode warning light system for projecting light at a predetermined angle in a long life, cost effective manner comprising, in combination:

a circular plate having an enlarged exterior periphery and a central circular attachment zone of a reduced circumference, the plate having an upper surface with a plurality of mounting areas thereon, the mounting areas including a plurality of mounting areas in a circular exterior array adjacent to the exterior periphery and a circular interior array around the circular attachment zone and a plurality of circular intermediate arrays there between;

a plurality of light emitting diodes having light emitting upper areas and with lower areas formed with electrical leads for illuminating the upper areas with intermediate securement means there between, each of the light emitting diodes being secured on the plate;

a reflector in a truncated cone-shaped configuration over essentially the entire surface of the reflector with a central axis perpendicular to the plate and a circular smaller end of a reduced circumference positioned within the circular attachment zone of the circular plate and with an circular upper end of an enlarged circumference at least as great as that of the plate positioned above the plate and parallel therewith and with an intermediate surface there between, the intermediate surface of the reflector having continually diminishing circumference from its upper end to its lower end and located entirely above the light emitting diodes and with the reflector and plate having a common axis there through and with the surface at an angle of between about 22 to 50 degrees from the common axis; and

means to apply an electrical current to the anodes and cathodes of the light emitting diodes whereby illumination from the upper ends of the light emitting diodes will project outwardly and also reflect from the surface of the reflector to disseminate an annular beam of the reflected light in all directions upwardly at between −

45 and +70 degrees from the plane of the plate with a horizontal divergence of between about 2 and 120 degrees, and a vertical divergence of between 2 and 46 degrees, preferably 10 degrees.