Downward illuminating lighting apparatus and lamp post comprising a light pole module thereof

Patent metadata

Field	Value
Publication number	US-11359782-B2
Application number	US-201917250027-A
Country	US
Kind code	B2
Filing date	May 8, 2019
Priority date	May 8, 2018
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A lighting apparatus comprising: a mounting substrate being arranged in the lighting apparatus at an angle below 45° with respect to a vertical direction; a plurality of light sources mounted on a lower or vertical surface of the mounting substrate such that at least two light sources are at a different height; a plurality of lens elements provided to the mounting substrate such that each of the light sources is provided with a corresponding lens element; at least two reflector elements provided to the at least two light sources, such that each of the at least two reflector elements has a reflective surface facing the mounting substrate; wherein each of the at least two reflector elements extends between a first edge, located above a corresponding light source as seen in a vertical direction, and a second edge, located below a corresponding light source as seen in a vertical direction.

First claim

The invention claimed is:

1. A lighting apparatus comprising:
a mounting substrate being arranged in the lighting apparatus at an angle below 45° with respect to a vertical direction;
a plurality of light sources mounted on a lower or vertical surface of the mounting substrate such that at least two light sources of the plurality of light sources are at a different height;
a plurality of lens elements provided to the mounting substrate such that each of the plurality of light sources is provided with a corresponding lens element;
at least two reflector elements provided to the at least two light sources, such that each of the at least two reflector elements has a reflective surface facing the mounting substrate;
wherein each of the at least two reflector elements extends between a first edge and a second edge;
wherein each of the at least two reflector elements first edge is being located above a corresponding light source of the at least two light sources as seen in a vertical direction;
wherein each of the at least two reflector elements second edge is being located below a corresponding light source of the at least two light sources as seen in a vertical direction.

2. The apparatus of claim 1 , further comprising a lens plate integrating the plurality of lens elements; wherein the at least two reflector elements are mounted on the lens plate.

3. The apparatus of claim 1 , wherein the plurality of light sources is arranged as an array of light sources with at least two rows of light sources and two columns of light sources.

4. The apparatus of claim 3 , wherein one or each of the at least two reflector elements corresponds to at least two adjacent light sources of a row of light sources; and/or
wherein one or each of the plurality of reflector elements corresponds to one lens element.

5. The apparatus of claim 1 , wherein one or each of the at least two reflector elements is at a tangential angle with respect to the mounting substrate at the first edge of each of the plurality of reflector elements, said tangential angle being between 90° and 170° with respect to the mounting substrate.

6. The apparatus of claim 1 , wherein a first reflector element of the at least two reflector elements is at a first obtuse tangential angle with respect to the mounting substrate lower than a second obtuse tangential angle of a second reflector element of the at least two reflector elements provided at a lower height; wherein the difference between the first and second obtuse tangential angle is at least 1%.

7. The apparatus of claim 1 , wherein the mounting substrate is vertical.

8. The apparatus of claim 1 , wherein one or each of the plurality of lens elements has a first surface and a second surface located on opposite sides thereof; wherein the first surface is a convex surface; wherein the second surface is a concave surface; and wherein the second surface extends over the corresponding light source.

9. The apparatus of claim 8 , wherein at least one of said first surface and said second surface of one or each of the plurality of lens elements comprises a first curved surface and a second curved surface, said first curved surface being connected to said second curved surface through a connecting surface or line comprising a saddle point or discontinuity.

10. The apparatus of claim 9 , wherein the first curved surface is located higher than the second curved surface as seen in a vertical direction, and wherein the saddle point or discontinuity is located below the corresponding light source as seen in a vertical direction, said saddle point or discontinuity being optionally comprised by the first surface of one or each of the plurality of lens elements.

11. The apparatus of claim 1 , wherein one or each of the plurality of lens elements comprises a free form lens element.

12. The apparatus of claim 1 , wherein one or each of the plurality of lens elements is configured for guiding at least 50% of the light emitted by the corresponding light source towards the reflective surface of the corresponding reflector element.

13. The apparatus of claim 12 , wherein one or each of the plurality of lens elements is configured for guiding at most 45% of the light emitted by the corresponding light source below the second edge of the corresponding reflector element.

14. The apparatus of claim 13 , wherein the plurality of lens elements associated and the at least two reflector elements are configured such that at least 55% of the light emitted by the at least two light sources is reflected by the at least two reflector elements.

15. The apparatus of claim 1 , further comprising:
another plurality of light sources mounted on a lower or vertical surface of the mounting substrate such that another at least two light sources of the another plurality of light sources are at a different height, wherein the plurality of light sources and the another plurality of light sources are at a different height;
a first light-shaping module;
a second light-shaping module;
wherein the first light-shaping module comprises:
the plurality of lens elements; and
the at least two reflector elements;

wherein the second light-shaping module comprises:
another plurality of lens elements provided to the mounting substrate such that each of the another plurality of light sources is provided with a corresponding lens element;
another at least two reflector elements provided to the another at least two light sources, such that each of the another at least two reflector elements has a reflective surface facing the mounting substrate;
wherein each of the another at least two reflector elements extends between a first edge and a second edge;
wherein each of the another at least two reflector elements first edge is being located above a corresponding light source of the another at least two light sources as seen in a vertical direction;
wherein each of the another at least two reflector elements second edge is being located below a corresponding light source of the another at least two light sources as seen in a vertical direction.

16. The apparatus of claim 15 , wherein a first distance h 1 between adjacent light sources at different heights associated with the first light-shaping module or second light-shaping module is lower than a second distance h 2 between a light source associated with the first light-shaping module and another light source associated with the second light-shaping module at a different height.

17. A light pole module comprising:
a lighting apparatus according to claim 1 ;
a housing, said housing comprising an at least partially transparent or translucent sidewall facing the plurality of light sources, and said housing further comprising a lower end portion configured for being attached to a support pole.

18. A lamp post comprising a support pole and a light pole module according to claim 17 .

19. The lamp post of claim 18 , further comprising a functional module;
wherein the functional module and the light pole module are arranged one above the other, aligned with the support pole; and
wherein the functional module comprises any one or more of the following:
an antenna configured for receiving and emitting cellular data;
power management circuitry configured to manage the provision of power to multiple lamp posts;
telecommunication circuitry;
audio system management circuitry;
WiFi circuitry;
charger circuitry;
an environmental sensor such as a microphone, a detector of CO 2 , NO x , or smoke, and the associated circuitry;
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Assignees

• Schreder Sa

Inventors

• Caprara Roxane

Classifications

• F21V13/04

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

• F21V7/0083

  Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane (combination of two or more reflectors F21V7/0025) · CPC title

• F21Y2105/10

  comprising a two-dimensional [2D] array of point-like light-generating elements · CPC title

• F21S8/085 Primary

  of high-built type, e.g. street light · CPC title

• F21S8/083

  of bollard type, i.e. with lighting fixture integrated into the standard or mounted on top of it and having substantially the same diameter · CPC title