LIGHTING FIXTURE WITH CONTROLLED PHOTOMETRIC LIGHT EMISSION

• US 20120224369A1
• Filed: 02/16/2012
• Published: 09/06/2012
• Est. Priority Date: 03/02/2011
• Status: Active Grant

• Current Assignee: Beghelli S.P.A.
• Original Assignee: Beghelli S.P.A.
• Inventors: Beghelli, Gian Pietro
• Granted Patent: US 8,757,850 B2
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21S 8/02 of recess-mounted type, e.g. downlighters specially adapted for vehicle exteriors F21S41/00-F21S45/00
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

Lighting fixture (10) with controlled photometric light emission, comprising a LED light source (21), whose operation is ensured by an electronic printed circuit board (20) which is properly sized and designed, and a housing (30) for containing the LED light source (21) and the electronic printed circuit board (20), able to obtain a heat dissipation; in particular, different type of lenses (25, 26, 27) having different surface geometry can be placed over the LED light source (21), said lenses (25, 26, 27) being able to direct the light beam emitted from the LED light source (21), in order to obtain uniform illumination on surfaces having variable geometry.

Claims

1. Lighting fixture (10) with controlled photometric light emission, comprising at least one LED light source (21), whose operation is ensured by an electronic printed circuit board (20) which is properly sized and designed, and at least one housing (30) for containing said LED light source (21) and said electronic printed circuit board (20) and able to obtain a heat dissipation, characterized in that different type of lenses (25, 26, 27) having different surface geometry are placed over said LED light source (21), said lenses (25, 26, 27) being able to direct the light beam emitted from said LED light source (21), in order to obtain uniform illumination on surfaces having variable geometry.

2. Lighting fixture (10) as claimed in claim 1, characterized in that said lenses (25, 26, 27) are made of methacrylate (PMMA) with high transparency and are placed within at least one cover (23).

3. Lighting fixture (10) as claimed in claim 1, characterized in that said fixture (10) is used for recessed installations, installations in existing lamps, ceiling installations and/or wall installations.

4. Lighting fixture (10) as claimed in claim 1, characterized in that said fixture (10) is fixed at a certain height by means of a bracket (24).

5. Lighting fixture (10) as claimed in claim 4, characterized in that at least one protective film (29) is positioned between said cover (23) and said electronic printed circuit board (20).

6. Lighting fixture (10) as claimed in claim 1, characterized in that at least one first (27) and at least one second type of lenses (26) are able to generate a symmetrical distribution of light, so as to obtain a squared illuminated area over a floor.

7. Lighting fixture (10) as claimed in claim 1, characterized in that a third type of lens (25) is able to generate an asymmetric light distribution to obtain a rectangular illuminated area over a floor.

8. Lighting fixture (10) as claimed in claim 6, characterized in that said first (27) and second type of lenses (26) have equal and symmetrical sections on plans (H, K) at 0°

and on plans at 90° and

a different section on a plane (J, L) at 45°

, said sections being able to identify on a plane a plurality of circle arcs, which form the geometrical shape of said lenses (27, 26), with rays having different lengths at least every 15°

of the section plane and with offset centers.

9. Lighting fixture (10) as claimed in claim 7, characterized in that said third type of lens (25) has different sections on planes (M, N, P) at 0°

, at 45° and

at 90°

, said sections being able to identify on a plane a plurality of circle arcs, which form the geometrical shape of said lens (25), with rays having different lengths at least every 15°

of the section plane and with offset centers.