Luminaire with LEDs and cylindrical lens

Patent metadata

Field	Value
Publication number	US-9695992-B2
Application number	US-201314397650-A
Country	US
Kind code	B2
Filing date	Mar 21, 2013
Priority date	May 2, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A lamp is provided having at least one module that includes a plurality of LEDs distributed over a module surface. The plurality of LEDs are arranged in a row of a plurality of rows in a longitudinal direction of the at least one module. Each of the plurality of rows are arranged next to each other in a transverse direction of the at least one module that is perpendicular to the longitudinal direction. The lamp includes an optical system for bundling the light emitted by the plurality of LEDs. The optical system includes at least one cylinder lens that extends in the longitudinal direction. The light of at least some of the plurality of LEDs from a first row of the plurality of rows is bundled into a line on a target surface by the at least one cylinder lens.

First claim

The invention claimed is:

1. A lamp comprising:
at least one module ( 1 ) having a plurality of light emitting diodes (LEDs) ( 3 ) distributed over a module surface ( 2 ), wherein the plurality of LEDs ( 3 ) are arranged in a plurality of rows (R) in a longitudinal direction (L) of the at least one module ( 1 ), and wherein more than one of the plurality of rows (R) are arranged next to each other in a transverse direction (W) of the at least one module ( 1 ) that is perpendicular to the longitudinal direction (L), and
an optical system ( 5 , 8 ) for bundling light emitted by the plurality of LEDs ( 3 ), the optical system ( 5 , 8 ) comprising a primary optical system ( 5 ) and a secondary optical system ( 8 ) for bundling the emitted light into a line on a target surface,
wherein the primary optical system ( 5 ) comprises a plurality of lenses ( 6 ) that are arranged directly on the plurality of LEDs ( 3 ), the primary optical system being provided as a transparent polymer layer that is applied to the at least one module ( 1 ) and extends, as a single part, above at least two of the plurality of LEDs ( 3 ), and
wherein the secondary optical system ( 8 ) is arranged in an optical path of the emitted light while being spatially separated from the at least one module ( 1 ), the secondary optical system ( 8 ) including a plurality of first cylinder lenses ( 9 ), each of which extends in the longitudinal direction (L) and is assigned to one the rows (R) of LEDs ( 3 ), each first cylinder lens ( 9 ) being configured to bundle light from the LEDs ( 3 ) in the corresponding row (R) into the line on the target surface.

2. The lamp according to claim 1 , wherein the primary optical system ( 5 ) comprises reflectors ( 11 ) that are arranged immediately lateral to the plurality of LEDs ( 3 ).

3. The lamp according to claim 1 , wherein the plurality of lenses ( 6 ) that are arranged above the plurality of LEDs ( 3 ) are positioned at a lateral offset (V 1 ) in the transverse direction with respect to a center ( 3 a ) of the plurality of LEDs ( 3 ).

4. The lamp according to claim 1 , wherein the secondary optical system ( 8 )is provided as a transparent polymer layer on a transparent substrate ( 10 ).

5. The lamp according to claim 1 , wherein at least two of the first cylinder lenses are arranged next to each other in a plane.

6. The lamp according to claim 5 , wherein the plane is inclined with respect to the module surface ( 2 ) or target surface.

7. The lamp according to claim 1 , wherein a central plane ( 3 a ) of the first row of the plurality of rows (R) of the plurality of LEDs ( 3 ), and a central optical axis ( 9 a ) situated parallel to the central axis of the row of the plurality of LEDs ( 3 ) of one of the first cylinder lenses ( 9 ) bundling the light of the row, are offset (V 2 +V 1 ) with respect to each other in the transverse direction.

8. The lamp according to claim 1 , wherein a packing density of the plurality of LEDs ( 3 ) in the longitudinal direction (L) is larger than in the transverse direction (W).

9. The lamp according to claim 1 , wherein the lamp is configured to dry a coating.

Assignees

• Heraeus Noblelight Gmbh

Inventors

• Schadt Susanne
• Peil Michael
• Maiweg Harald

Classifications

• F21K9/60 Primary

  Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction · CPC title

• G02B3/06

  with cylindrical or toric faces · CPC title

• B41F23/0409

  Ultraviolet dryers · CPC title

• F21V13/04

  the elements being reflectors and refractors {(for vehicle rear lights F21S43/40)} · CPC title

• F21V5/007

  Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane (combination of two or more refractors F21V5/008) · CPC title