The present invention relates to a modular LED luminaire for street lights and the like.
As is known, there are several types of public lighting apparatus that include lighting apparatuses for vehicular roads.
Lighting apparatuses for vehicular roads include lighting bodies with an optical system that is specific for lighting streets with motorized traffic.
Apparatuses provided with LED devices, constituted by a plurality of LEDs arranged in parallel rows, each provided with its own optical system, are increasingly widespread.
In order to obtain the photometric curve required by the specific application, manufacturers normally modify the geometry of the lenses and the arrangement of each LED as a function of the type of road to be lit.
For example, the LEDs located close to the edge of the roadway, i.e. close to the support of the street light, diffuse the light downward and to the sides, while the LEDs that are progressively further away from the base diffuse the light forward, i.e., toward the center of the roadway, because the street lights are generally arranged on both sides of the roadway in interleaved positions.
LED modules constituted by a plurality of LEDs arranged in a row on an elongated plate are known. Those modules can be assembled in parallel rows in order to form a battery of LED modules.
However, each individual LED must be provided with a different lens, by shape and orientation, in order to obtain the desired photometric curve and according to the required luminous intensity.
The manufacture and installation of LED street lights is therefore onerous in terms of costs and time.
A problem of the known LED lighting systems is to effectively and economically seal the electrical components, the LED and the optical systems from the environment.
The aim of the present invention is to provide a modular LED luminaire, for street lights and the like, that overcomes the drawbacks of the cited prior art.
Within the scope of this aim, an object of the invention is to provide an LED module for a street light that does not require any intervention for modification on the lenses of the individual LEDs in order to vary the luminous intensity of the street light and modify the photometric curve.
Another object of the invention is to provide a modular device that is constituted by a limited number of components.
Another object of the present invention is to provide a device which, by virtue of its particular constructive characteristics, is capable of giving the greatest assurances of reliability and safety in use.
This aim and other objects that will become better apparent hereinafter are achieved by a modular LED luminaire for street lights and the like, comprising an LED board having a plurality of LEDs arranged in rows; a transparent plate provided with a number of lenses that corresponds to the number of said LEDs; said plate being applied to said board wherein each LED corresponds to a respective lens; said luminaire is characterized in that each one of said lenses has a different profile in order to distribute the light emitted by the respective LED in a different manner.
Further characteristics and advantages will become better apparent from the description of preferred but not exclusive embodiments of the invention, illustrated by way of non-limiting example in the accompanying drawings, wherein:
With reference to the cited figures, the modular LED luminaire according to the invention, generally designated by the reference numeral 1, comprises an LED board 2 on which a series of LEDs 3 is soldered.
In the example illustrated herein, the LED board 2 includes a total of sixteen LEDs 3 which are arranged in pairs longitudinally along the board 2.
The board 2 is associated with an aluminum heat sink 4.
According to the present invention, a transparent plate 5, provided with a number of lenses that corresponds to the number of LEDs 3 of the board 2, is applied to the board so that each LED 3 or pair of LEDs 3 works in a respective lens.
Specifically, there are eight double lenses, designated by the reference numerals 61, 62, 63, 64, 65, 66, 67 and 68, each of which has a different profile in order to distribute the light emitted by the pair of LEDs in a different manner.
The transparent plate 5 has an internal edge 8 configured so as to provide the seal with the LED board 2.
The luminaire 1 also has a front member 9, constituted by a casing made of plastics, which has the function of pressing the transparent plate 5 against the LED board 2 when the assembly is mounted in the street light.
Specifically, the device 1 is designed to be mounted in a street light body 7, transversely to the roadway lit by the street light, which is arranged at the edge of the roadway, and therefore the double lenses 61-68 are designed to distribute the light forward. In other words, the front double lens 61 distributes the light forward, toward the center of the roadway, while the double lenses that are progressively further backward, up to the last rear lens 68, distribute the light in a manner that is more diffused downward.
As shown more clearly in
The street light body 7 can have a variable number of modules 1 so as to modify the luminous intensity of the street light according to the specific requirements, as a function of the height of the poles and of the mutual distance, without however modifying the photometric curve, differently from traditional systems in which the geometry of the lenses and the arrangement are modified as a function of the type of road to be lit.
The modular device according to the present invention is arranged longitudinally and provides a luminous emission that is directed forward, without the need to orient the modules.
In practice it has been found that the invention achieves the intended aim and objects providing a modular LED luminaire that allows to modify the luminous characteristics of a street light simply by modifying the number of luminaires mounted therein, without further interventions.
An advantage of the present invention resides in that it has a single plate, provided with multiple lenses, which provides the required optical performance and also constitutes a sealing element to protect the LEDs.
This application claims the priority of Italian Patent Application No.
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