Elongated luminaire comprising LEDs for illuminating objects in front of the luminaire

• US 8,337,044 B2
• Filed: 10/20/2008
• Issued: 12/25/2012
• Est. Priority Date: 10/25/2007
• Status: Expired due to Fees

• Current Assignee: Philips Lighting BV (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Tukker, Teunis Willem, Van Oers, Denis Joseph Carel, Timmers, Wilhelmus Adrianus Gerardus, Van Lier, Edwin
• Primary Examiner(s): ALLEN, DANIELLE NICOLE
• Application Number:
  US12/738,313
• Publication Number:
  US 20100232156A1
• Time in Patent Office: 1,527 Days
• Field of Search: 362/235, 362/217.01, 362/219, 362/217.05, 362/217.06, 362/217.07, 362/217.1, 362/227, 362/230, 362/231, 362/237, 362/238, 362/240, 362/241, 362/243, 362/245, 362/247, 362/249.02
• US Class Current: 362/235
• CPC Class Codes: A47F 3/001 Devices for lighting, humidifying, heating, ventilation
• CPC Class Codes: A47F 3/04 air-conditioned, refrigerated refrigerators F25D; heating arrangements specially adapted for transparent or reflecting areas H05B3/84
• CPC Class Codes: F21S 4/20 with light sources held by or within elongate supports
• CPC Class Codes: F21W 2131/305 for refrigerators
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F25D 27/00 Lighting arrangements in general F21
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0066 in the form of an LED array

Abstract

An elongated luminaire for illuminating objects in front of the luminaire, comprising a plurality of side emitting LEDs (1) in only one straight array mounted on an elongated base plate (2). The base plate (2) carries two elongated reflectors (3) extending on either side of the array of LEDs (1) and parallel to the array of LEDs (1). Each reflector (3) has a reflecting surface (4) directed towards the array of LEDs (1).

Claims

1. An elongated luminaire, comprising:

a plurality of side-emitting LEDs disposed in at least one linear array mounted on an elongated base plate; and

at least two generally flat reflectors extending from said base plate at each side along and generally parallel to said linear array, each reflector having a profiled reflecting surface, wherein a ratio between a shortest distance (L) between the base plate and a top edge of said reflectors and a height of said plurality of side-emitting LEDs ranges from ¾

to 1 and wherein said profiled reflecting surface includes a plurality of undulations generally propagated towards the array of LEDs.

2. An elongated luminaire as claimed in claim 1, wherein the profiled reflecting surface is inclined with respect to the base plate.

3. An elongated luminaire as claimed in claim 1, wherein the reflecting surface of each of the reflectors diverge with respect to each other at an angle between 0°

and 60°

.

4. An elongated luminaire as claimed in claim 1, wherein the reflecting surfaces of each of the reflectors are generally symmetrical relative to said linear array.

5. An elongated luminaire as claimed in claim 1, further comprising a transparent cover plate disposed at the side of the luminaire opposite to the base plate, interconnecting the edges of the reflectors facing away from the base plate.