WO2020183381A1

WO2020183381A1 - Led scialytic lamp for medical or surgical applications

Info

Publication number: WO2020183381A1
Application number: PCT/IB2020/052123
Authority: WO
Inventors: Nicola Giaffreda; Alessandro STAFFA; Davide Galletti
Original assignee: G.Comm S.R.L.
Priority date: 2019-03-11
Filing date: 2020-03-11
Publication date: 2020-09-17
Also published as: IT201900003525A1; EP3937826A1; WO2020183381A9

Abstract

A LED scialytic lamp (1) that comprises at least one first lighting system (S1) comprising at least one first LED source (10a) and at least one respective optical element (11), and at least one second LED source (10b), and at least one respective optical element (11) for focusing the light radiation emitted by the first lighting system Sl on at least part of a first operating area (Al); at least one second lighting system (S2) comprising at least one first LED source (20a) and at least one respective optical element (21), and at least one second LED source (20b) and at least one respective optical element (21) for focusing the light radiation emitted by the second lighting system S2 on at least part of a second area (A2), is described. The lamp further comprises a structure (40) comprising at least one base body (40a, 40b, 40c, 40d) on which at least one first LED source (10a) and at least one second LED source (10b) of said first lighting system (S1), and at least one first LED source (20a) and at least one second LED source (20b) of said second lighting system (S2), are arranged. The lamp further comprises control means (U) configured to alternatively select at least one first operating mode in which the light radiation emitted by said at least one first LED source (10a) and said at least one second LED source (10b) of said at least one first lighting system (S1) illuminates at least part of a first operating area (A1), and at least one second operating mode in which the light radiation emitted by said at least one first LED source (20a) and said at least one second LED source (20b) of said at least one second lighting system (S2) illuminates at least part of a second operating area (A2).

Description

"LED scialytic lamp for medical or surgical applications"

* * *

Field of the invention

The present invention relates to LED scialytic lamp adapted to be used in medical or surgical applications, to illuminate operating areas with different geometric shapes and different spectrophotometric characteristics.

Known prior art

In the field of dental/oral surgery, in order to illuminate the operating area, it is known the use of particular lamps, defined scialytic, that have no shadows and are able to exclusively illuminate the aforementioned operating area and are adapted to provide complete visibility of the operating area for the entire duration of the operation, as the light sources of these lamps, which project light onto the area to be illuminated (which here and below will also be denoted by the term operating area or illuminated area), are arranged and oriented so as to minimize the presence of shadows projected for example by the instruments used, by the hand or head of the surgeon or dentist, which all stand between the lamp and the illuminated area.

The illuminated area must meet certain basic requirements to provide the surgeon with good visibility throughout the entire duration of the procedure.

In particular, the illuminated areas have peculiar characteristics, depending on whether the operation takes place in surgery or dentistry.

The area illuminated by the scialytic lamps for surgical applications is typically large and round in shape, and intensely illuminated. Typical indicative illuminance values for illuminated areas with a diameter of about 250mm are of the order of about 120 Kilolux, with the illumination gradually softening and thinning out towards the perimeter.

In surgical applications, the illuminated area must comply with specific standards, e.g. IEC - 60601 - 2 - 41 relating to basic safety and essential performance of surgical lighting apparatuses and lighting apparatuses for diagnosis.

On the other side, the area illuminated by the scialytic lamps for dental applications is typically rectangular or elliptic, and averagely illuminated. Typical illuminance values for illuminated rectangular areas, e.g. whose dimensions are 140mm x 70mm, are of the order of about 50 Kilolux, with sharper, more sudden softening towards the boundaries of the figure.

The illuminated area in dental applications must comply with specific standards, e.g. EC - EN - 9680, which specifies the requirements and test methods for lamps used in dental practices and intended to illuminate the oral cavity of patients. The standard also provides specifications for the manufacturer's instructions for use, packaging and marking.

It should be considered that in the operating field, the operations typically take place on sedated patients and in any case in areas far from the eyes, while in the dental field the operating field or operating area coincides with the mouth area, so a fundamental requirement the operating light in use must comply with is not to dazzle and not to damage the patient's eyes.

That’s why an illuminated area with sharper boundaries is needed in the dental sector. The characteristics of the light source can also be different for the different fields of application, for example color rendering indexes greater than 98CRI are used in the surgical sector, particularly optimized on R9 (red) and R13 (skin color) and with color temperatures between 4000K and 5500K, while for the dental sector reference is made to general color rendering greater than 95CRI and with color temperatures between 3000K and 6000K, which must also be able to operate by activating a filtering mode of certain wavelengths, when using, for example, certain reconstruction resins which would activate and polymerize faster if irradiated with such specific wavelengths of light. Typically, the light sources used for such scialytic lamps are LED sources mounted individually or in groups, and whose intensity is adjustable according to the specific characteristics of the desired illuminated area.

It should be noted at once that the expressions "LED source", or simply "LED", mean here and below at least one light source using LED technology (light emitting diode) to emit light radiation. In particular, it should be noted that, as known in the art, light emitting diodes can be arranged on a module or board that is conventionally referred to in the industry as "LED board". The term LED board will be used here and below to denote at least one light source, and therefore one or more light emitting diodes and the respective base or module. Obviously, in the lamp according to the present invention, LEDs of a type known in the art can be used.

Typically, a lamp with scialytic effect is obtained either by directly differentiating and multiplying the number of LED light sources present on the lamp, or else indirectly through a system reflecting the sources themselves.

It is therefore apparent that for the surgical field and dental field, lamps that differ in technical, constructive and regulatory characteristics and form illuminated areas having different shapes, color rendering, light temperatures and illuminance, are used.

In the surgical field there is a growing need to operate in mixed areas, both surgical and dental, for example in the maxillofacial sector.

In this case it is useful that the operator has at his/her disposal both the scialytic lamps, depending on the type of operation to be carried out, thus resulting in increased costs and overall dimensions and increased time to manage more lighting devices, even in spaces that may sometimes be confined.

A further problem is that known scialytic lamps often have large and expensive heat dissipation systems, in order to effectively dissipate the heat generated by LEDs.

It is an object of the present invention to provide a scialytic lamp which is able to overcome the above mentioned drawbacks.

A further object is to provide a scialytic lamp having good dissipation of the heat generated by LED sources and low production costs.

Summary of the invention

These and other objects are achieved by a scialytic lamp according to claim 1, comprising at least one first lighting system comprising at least one first LED source provided with at least one respective optical element, and at least one second LED source provided with at least one respective optical element, for focusing the light radiation emitted by said first lighting system on at least part of a first operating area;

at least one second lighting system, which can be activated alternatively to the first lighting system, comprising at least one first LED source provided with at least one respective optical element, and at least one second LED source provided with at least one respective optical element, for focusing the light radiation emitted by said second lighting system on at least part of a second operating area;

a structure comprising at least one base body on which at least one first LED source and at least one second LED source of the first lighting system, and at least one first LED source and at least one second LED source of the second lighting system, are arranged.

The lamp further comprises control means configured to alternatively select at least one first operating mode in which the light radiation emitted by the first lighting system illuminates at least part of a first operating area, and at least one second operating mode in which the light radiation emitted by the second lighting system illuminates at least part of a second operating area.

Advantageously, the lamp according to the present invention allows at least two different areas to be illuminated according to at least two different operational modes, respectively suitable for surgical or dental applications.

In fact, for example, according to the present invention, the aforesaid first operating area can have a geometry typical to carry out a surgical operation (being, for example, circular) and the respective first operating mode can allow such first operating area to be illuminated with a light intensity (e.g. 120 Kilolux), and with particular spectrophotometric characteristics, suitable for such a surgical operation, while the aforesaid second operating area can have a shape suitable for a dental operation (for example being rectangular) and the respective second operating mode can allow the second operating area to be illuminated with a light intensity (e.g. 50 Klux), and with particular spectrophotometric characteristics, suitable for a dental operation, or vice versa.

In this way, the lamp according to the present invention allows two operating areas with spectrophotometric and/or geometric characteristics different from each other to be alternatively illuminated through the first and the second lighting systems, thereby being able to be utilized for the different modes of use mentioned above.

According to an aspect of the invention, the at least one first lighting system has different optical characteristics with respect to the at least one second lighting system.

According to an aspect of the invention, the at least one first lighting system comprises at least one first LED source, that emits light radiation in a wavelength range comprised in the visible light spectrum and is equipped with at least one respective optical element for focusing the emitted radiation on a first area, and at least one second LED source equipped with at least one respective optical element for focusing the light radiation emitted on the first area, wherein said at least one second LED source emits a light radiation in a wavelength range comprised in the visible light spectrum that is different from the wavelength range of the light radiation emitted by the at least one first LED source of said first lighting system.

According to an aspect of the invention the at least one second lighting system, which can be activated alternatively to the first lighting system, comprises at least one first LED source emitting light radiation in a wavelength range comprised in the visible light spectrum and is equipped with at least one respective optical element for focusing the emitted radiation on a second area, and at least one second LED source equipped with at least one respective optical element for focusing the light radiation emitted on the second area, in which said at least one second LED source emits light radiation in a wavelength range comprised in the visible light spectrum that is different from the wavelength range of the light radiation emitted by the at least one first LED source of said second lighting system.

According to an aspect of the invention, the control means that allows the selection of the lighting system to be activated are of electronic type, and preferably the means comprise at least one control unit provided with a processor preferably configured to send an activation and adjustment signal to the first and second lighting systems.

Advantageously, the scialytic lamp according to the present invention allows a simple and effective operation for alternatively selecting one of the two operating modes, and therefore for selecting the respective operating area to be illuminated with predetermined lighting characteristics.

According to an aspect of the invention the light radiation emitted by the at least one first LED source of said first lighting system, which for example has a wavelength in the spectrum of red, amber or white light at 4000K, has characteristics of the radiation spectrum distinct from the characteristics of the spectrum of the light radiation emitted by the second LED source of said first lighting system, which for example emits white light at 5500K.

As regards the second lighting system, according to an aspect of the invention, the light radiation emitted by the at least one first LED source of said second lighting system, which for example has wavelength in the red, amber or white light spectrum at 3000K, has characteristics of the radiation spectrum distinct from the characteristics of the light radiation spectrum emitted by the at least one second LED source of said second lighting system, which for example emits white light at 6000K.

According to an aspect, the intensity of the light radiation emitted by the first or second lighting system is adjusted by adjusting the intensities of the light radiation emitted by said at least one first LED source and by said at least one second LED source of the first or second lighting system, by adjusting the intensities of the radiation emitted by the first and second sources in a way inversely dependent on each other, by increasing the intensity of the light radiation emitted by the at least one first LED source as the intensity of the light radiation emitted by the at least one second source decreases and vice versa, by adjusting the voltage of the electric current and/or the intensity of the electric current supplied to the scialytic lamp.

In other words, an increase in the intensity of the first source results in a decrease in the intensity of the second source, and vice versa.

Advantageously, the scialytic lamp according to the present invention allows a simple and effective adjusting operation of the light intensity of the light radiation emitted by the first or second lighting system of said first or second operating area.

Advantageously, such a configuration allows the spectrophotometric characteristics of the first lighting system in the first operating area to be simply and effectively adjusted by adjusting the intensities of the at least first LED source and the second LED source each emitting light radiations having optical properties different from each other.

Advantageously, such a configuration allows the spectrophotometric characteristics of the second lighting system in the second operating area to be simply and effectively adjusted by adjusting the intensities of the at least first LED source and the second LED source each emitting light radiations having optical properties different from each other. According to another aspect of this invention, the aforesaid at least first lighting system emits light radiation with CRI greater than 95, preferably greater than 98, and color temperature between 4000K and 5500K.

According to a further aspect of this invention, the at least one second lighting system emits light radiation with CRI greater than 90, preferably greater than 95, and color temperature between 3000K and 6000K.

According to another aspect of the present invention, each base body of the lamp structure comprises a plurality of first LED sources and a plurality of second sources of the first lighting system and of respective optical elements, and at least one plurality of first LED sources and at least one plurality of second sources of the second lighting system and respective optical elements.

According to a further aspect of this invention, the scialytic lamp comprises at least one supporting element to support the at least one first LED source and/or the at least one second LED source of the first lighting system, wherein such supporting element is connected to said at least one base body and comprises at least one outlet opening, at which the at least one optical element for the passage and focusing of the light radiation emitted by either the at least one first LED source and/or the at least one second LED source of the first lighting system, is arranged.

According to a further aspect of the invention, the scialytic lamp comprises at least one supporting element to support the at least one first LED source and/or the at least one second LED source of the second lighting system, and said first supporting element is connected to said at least one base body and comprises at least one outlet opening, at which the at least one optical element for the passage and focusing of the light radiation emitted by either the at least one first LED source and/or the at least one second LED source of the second lighting system, is arranged.

According to a further aspect of the invention, the supporting element houses the at least one first and the at least one second LED sources in correspondence of its own base portion in a position substantially opposite the opening at which the at least one optical element, e.g. at least one lens, is arranged.

The supporting element preferably houses at least two of said first and second LED sources, and preferably houses a plurality of said first and second LED sources as well as at least one optical element, preferably with the LED sources in correspondence of the base portion in a position that is substantially opposite the opening at which the at least one optical element for the respective LED source is arranged.

Advantageously, the supporting elements are structured so that the required optical and mechanical elements, oriented to correctly focus each light source towards the focusing direction and therefore towards the area to be illuminated, are provided in correspondence of the position of each LED source. According to a further aspect of the invention said at least one first outlet opening and said at least one second outlet opening have different geometry.

Advantageously, such a configuration allows two distinct and alternative illuminated areas having different spectrophotometric and/or shape characteristics to be obtained so that the operator can select between them.

According to another aspect of the invention, in order to form the aforesaid structure, two or more base bodies can be reversibly assembled or constrained to each other, preferably in correspondence of at least one perimeter edge.

According to a further aspect of this invention, the structure comprises at least two base bodies that are equal to each other.

According to a further aspect, the structure of the scialytic lamp according to the invention can be made by means of the constraint, preferably of reversible type, of one or more base bodies.

Advantageously, thanks to such a configuration, a scialytic lamp with modules able to be reversibly assembled can be manufactured. In this way, lamps can be manufactured by using a preferred number of modules, so as to obtain lamps of variable size, which illuminate an operating area with an appropriate light intensity depending on the purpose of use.

For example, scialytic lamps with four modules but also lamps with a smaller number of modules, e.g. lamps obtained from single, double or triple modules, may be assembled, useful for example as accessory/satellite lamps or in consulting room environments. Advantageously, the modular configuration able to be assembled of the scialytic lamp according to the invention can allow the heat generated by each module (or group) to be better dissipated, as the shape and section of these base bodies on which the LED sources are arranged allow the heat generated by the LED to be easily transferred towards the opposite outer face of the base body, where it is dissipated to the environment, in addition the material of the base body is preferably provided to be thermally conductive.

Preferably, the at least one base body is provided with at least one fin, preferably a plurality of fins, which according to a possible embodiment are arranged in correspondence of the base body on which the two lighting systems are placed.

According to an aspect, the LED sources of the first and second lighting systems are arranged in correspondence of this heat dissipation fin or fins. According to an aspect, the dissipation fin or fins are arranged on the base body in correspondence of the positions where the LED sources of the two lighting systems are placed.

According to an aspect of the invention, the first operating area illuminated by the first lighting system and the second operating area illuminated by the second lighting system have different shape and/or size, preferably the first illuminated area (first operating area) is substantially circumferential, preferably round or elliptical, and the second illuminated area (second operating area) is substantially polygonal, preferably rectangular or square. According to a further aspect, the first illuminated area and the second illuminated area have respective illuminance values and spectrophotometric characteristics different from each other.

Advantageously, this configuration of the scialytic lamp according to the present invention provides a versatile scialytic lamp that can be used in different fields of application, where illuminated areas both with different geometry and with different lighting and photometry characteristics are required.

Advantageously, as already mentioned, according to this configuration, two distinct illuminated areas, different for geometry and optical properties, can be obtained at the same distance from the scialytic lamp, in particular a first illuminated area having circumferential shape for the specific use in surgical applications, and an illuminated area having different shape, for example rectangular, polygonal or elliptical, for the specific use in dental applications, can be obtained.

According to an aspect of the present invention, the first area illuminated by the first lighting system and the second area illuminated by the second lighting system lie in correspondence of a same axis (X), preferably in correspondence of a main projection axis (or central projection axis) of light radiation.

According to an aspect, said axis (X) is an axis of symmetry of the first and second illuminated areas.

According to an aspect, said axis (X) corresponds to the central axis of the lamp and preferably to the central axis of the lamp structure formed, for example, by two or more base bodies constrained to each other.

According to an aspect of the present invention, the light radiation emitted by the first lighting system (SI) and the light radiation emitted by the second lighting system (S2) both intersect a same axis (X), preferably intersect a main projection axis (or central projection axis) of light radiation.

The present invention also relates to a method of lighting at least two alternative operating areas by means of a scialytic lamp described and/or claimed herein.

It should be noted that what described and/or claimed herein referring to the scialytic lamp may be applied likewise to the method of lighting, and vice versa.

Object of the present invention is also a modular base body to manufacture the structure of a scialytic lamp. Preferably the modular base body can be constrained, preferably in a reversible way, to at least one second modular base body, preferably equal to the former. Description of the figures

Further characteristics and advantages of the present invention will be more evident in the following description, given for illustrative purposes by referring to the attached figures, in which:

• figure la is a schematic section of the scialytic lamp according to the invention in which the paths covered by the light radiation emitted by a first and a second LED sources of the first lighting system that illuminates a first area are visible;

• figure lb is the schematic section of the scialytic lamp 1 according to the invention of figure la in which the paths covered by the light radiation emitted by a first and a second LED sources of the second lighting system that illuminates a second area are visible;

• figure 2a is a schematic section of the scialytic lamp according to the invention in which the paths covered by the light radiation emitted by at least one first lighting system, having a first LED source and a second LED source, arranged in the same supporting element that illuminates a first area, are visible;

• figure 2b is the schematic section of the scialytic lamp according to the invention in which the paths covered by the light radiation emitted by at least one second lighting system having a first LED source and a second LED source grouped in the same supporting element, that illuminates a second area, are visible;

• figure 3a is a front bottom view of an embodiment of the scialytic lamp according to the invention, wherein a carter and the side connection for an outer arm, as well as a central element that acts as handle and/or container for a camera, are all visible;

• figure 3b is a perspective bottom view of the lamp of figure 3a;

• figure 4a is a perspective top view of an embodiment of the scialytic lamp according to the invention; without the carter and in which the structure consisting of four modular base bodies are visible;

• figure 4b is a perspective bottom view of the lamp of figure 4a;

• figure 5a is a perspective top view of the scialytic lamp according to the invention, without carter and having only one modular base body;

• figure 5b is a perspective bottom view of the scialytic lamp of figure 5a;

• figure 6a is a bottom view of only the modular base body of the scialytic lamp according to the invention;

• figure 6b is a perspective top view of the modular base body of figure 6a;

• figure 6c is a perspective bottom view of the modular base body of figures 6a and

6b.

Detailed description of the invention

Some possible embodiments of the scialytic lamp 1 according to the present invention will be described referring to the attached figures.

However, the present invention can be implemented in many different embodiments and has not to be intended as limited to those described below; rather, these embodiments are provided so that this description is complete and fully comprehensible to those skilled in the art with exemplary and nondimiting reference to the attached figures.

A scialytic LED lamp 1 according to the invention comprises at least one first lighting system SI comprising at least one first LED source 10a and at least one respective optical element 11, e.g. a lens preferably a TIR (Total Internal Reflection) lens, for focusing on a first area A1 the light radiation emitted by the first LED source 10a, and at least one second LED source 10b having optical characteristics different from the first LED source 10a and at least one respective optical element 11 for focusing on the first area A1 the light radiation emitted by the second LED source 10b of said first SI lighting system, as shown for example in figure la.

It should be noted that the optical element 11, for example the TIR lens, may comprise a plurality of lenses, which are made in one piece or joined together, each placed in correspondence of at least one respective LED source. As can be seen, for example, in figures 4b, 5b, the TIR lens 11 may comprise a plurality of lenses each for a respective LED source, e.g. the TIR lens 11 may be made of a transparent amorphous polymer, e.g. polycarbonate or polymethyl methacrylate.

The lighting system SI is suitable for focusing the light radiation emitted by this first lighting system SI on a first operating area Al, as shown for example in figure la.

In an embodiment according to the invention, this first lighting system has color rendering indexes (CRI) greater than 95, preferably greater than 98, and are optimized for red color rendering (index R9 > 98) and skin color rendering (index R13 > 98), these indexes being measured at color temperatures between 4000k and 5500K, and are therefore suitable for application in surgical field.

In an embodiment according to the invention, at least one first LED source 10a and at least one second LED source 10b have different optical characteristics.

As shown for example in figure lb, the lamp 1 according to the invention further comprises at least one second lighting system S2 comprising at least one first LED source 20a and at least one respective optical element 21, and at least one second LED source 20b having optical characteristics different from the first LED source 20a and at least one respective optical element 21 for focusing the light radiation emitted by the second LED source 20b of said second lighting system S2 on the second area A2 .

The lighting system S2 is suitable for focusing the light radiation emitted by this second lighting system S2 on a second operating area A2.

Preferably the light radiations emitted by this first LED source 20a and by this second LED source 20b of the second lighting system S2 pass through the aforesaid optical element 21, which is for example a lens, preferably a biconvex one.

Preferably, the light radiations emitted by this first LED source 20a and this second LED source 20b of the second lighting system S2 pass through at least one light-guide element 26 (schematically shown in figures la - 2b, for example provided with a rectangular passage section) arranged between the LED source 20a - 20b and the optical element 21. In an embodiment, the first lighting system SI comprises at least one first LED source 10a and at least one second LED source 10b, both grouped in LED modules.

In the embodiment shown in figure 2b, the second lighting system S2 comprises at least one first LED source 20a and at least one second LED source 20b, grouped in LED modules.

Preferably, the light radiations emitted by such LED sources 20a - 20b pass through at least one respective optical element 21, for focusing the light radiation emitted on a second area A2, e.g. a lens, preferably a biconvex lens.

Preferably, the light radiations emitted by the LED sources 20a - 20b of the second lighting system S2 pass through a light-guide element 26 placed between the LED source and the optical element.

In an embodiment according to the invention, this second lighting system S2 has color rendering indexes (CRI) greater than 90, preferably greater than 95, these indexes being measured at color temperatures between 3000K and 6000K, and are therefore suitable for applications in the dental field.

In an embodiment the at least first LED source 20a has optical characteristics different from the second LED source 20b.

It should not be excluded that in alternative embodiments the at least one first LED source and the at least one second LED source of the first lighting system SI and/or the second S2 lighting system are equipped with a common optical element.

According to an aspect of the present invention, the light radiation emitted by the first lighting system SI (preferably emitted by at least one first LED source 10a and at least one respective optical element 11 and at least one second LED source 10b and at least one respective optical element 11), and the light radiation emitted by the second lighting system S2 (preferably emitted by at least one first LED source 20a and at least one respective optical element 21, and at least one second LED source 20b and at least one respective optical element 21) intersect a same axis X, preferably intersect a main projection axis (or central projection axis) of the light radiation.

According to an aspect, said axis X corresponds to the central axis of the lamp and preferably to the central axis of the lamp structure formed, for example, by two or more base bodies constrained to each other, as better described in detail below. The lamp 1 according to the invention further comprises a preferably modular base structure 40 comprising at least one base body 40a, 40b, 40c, 40d on which at least one first LED source 10a and at least one second LED source 10b of the first lighting system SI and which has optical characteristics different from the first LED source 10a, and at least one second LED source 20a and at least one second LED source 20b having optical characteristics different from the first LED source 20a of the second lighting system S2, are arranged.

As will be better seen below, in an embodiment shown in figures 4a and 4b, the lamp is formed by a plurality of modular base bodies 40a, 40b, 40c, 40d, preferably equal to each other, which can be quickly constrained in variable numbers according to the needs.

The lamp 1 according to the invention can be used in two distinct operating modes through control means U (schematically shown only in figure la for simplicity) configured to alternatively select at least one first operating mode, in which the light radiation emitted by the at least one first lighting system SI illuminates at least part of a first operating area Al, as shown in figures la and 2a, and at least one second operating mode in which the light radiation emitted by the at least one second lighting system S2 illuminates at least part of a second operating area A2, as shown in figures lb and 2b.

As mentioned, in an embodiment according to the invention, the control means U may comprise electronic-type means, which alternatively allow or prevent the activation of the LED sources, such as for example a control unit which comprises a processor and can be connected to switches or circuit breakers acting on the aforesaid LED sources of the first and second lighting systems SI, S2.

In order to illuminate a first area Al or a second area A2 having geometry different from each other, the scialytic lamp 1 according to the invention can be operated according to the first or second mode, respectively, as will be better discussed below.

In a preferred embodiment shown in figures 4a and 4b, the scialytic lamp 1 comprises a plurality of modular base bodies 40a, 40b, 40c, 40d shaped as sectors of an annular surface (or annulus), and more preferably shaped as quarters of an annular surface.

In a further embodiment according to the invention not shown in the figure, in which the modular structure 40 comprises a plurality of modular base bodies 40a, 40b, 40c, 40d, they are shaped as sectors of circumference, which subtend an arc of circumference of equal or different dimensions.

In a further embodiment shown in figures 3a and 3b, the base structure 40 comprises a single base body, which is substantially circumferentially shaped.

In a possible embodiment according to the invention, these modular base bodies 40a, 40b, 40c, 40d can be made of metal material, preferably aluminum or an alloy thereof.

In a possible embodiment according to the invention, these modular base bodies 40a, 40b, 40c, 40d can be made of polymeric material, preferably a thermally conductive polymer. In a preferred embodiment of the present invention shown in figures 4b, 5b, each modular base body 40a, 40b, 40c, 40d comprises a plurality of first LED sources 10a and respective optical elements 11, and a plurality of first LED sources 20a and respective optical elements 21 of the first and second lighting systems SI, S2, respectively, and at least one plurality of said second LED sources 10b and respective optical elements 11 and of said second LED sources 20b and respective optical elements 21, respectively of the first and second lighting systems SI, S2.

In an embodiment shown in figures la and lb, the scialytic lamp 1 according to the invention comprises at least one first supporting element 12 for both the at least one first LED source 10a of the first optical system SI and the at least one respective optical element 11, and at least one second supporting element 12 for both the at least one second LED source 10b of the first optical system SI and the at least one respective optical element 11.

The two supporting elements 12 for the first and second LED sources, respectively, can be placed adjacent to each other, basically in contact with each other, or can be spaced apart.

In a further embodiment shown for example in figures 2a, 2b, 3a, 3b, 4b and 5b, the lamp 1 comprises a supporting element 12 for housing at least one first and at least one second LED sources 10a, 10b and the respective optical elements 11. According to this configuration, as discussed above, the optical element 11 can comprise a plurality of lenses (for example schematically shown in figures 4b and 5b) for a respective LED source installed in the supporting element 12.

The supporting element 12 is connected to the respective base body 40a, 40b, 40c, 40d and comprises a cavity or seat, in which the at least one first and the at least one second LED sources 10a, 10b, as well as the respective optical elements 11 of the first lighting system SI, are housed.

In an embodiment according to the present invention, shown in figures 4b and 5b, on the front of the supporting element 12 there is at least one output opening 13, at which at least one optical element 11 is placed, for the passage and focusing of the light radiations emitted by said at least one first and at least one second LED sources 10a, 10b.

In an embodiment shown in figures la and lb (2a, 2b), the scialytic lamp 1 according to the invention further comprises at least one first supporting element 22 for both the at least one first LED source 20a and the at least one respective optical element 21 of the second lighting system, and at least one second supporting element 22 for both the at least one second LED source 20b of the second optical system S2 and the at least one respective optical element 21.

The two supporting elements 22 for the first and second LED sources, respectively, can be placed adjacent to each other, basically in contact with each other, or can be spaced apart.

In a further embodiment shown in figures 4b, 5b, the lamp 1 comprises a supporting element 22 for housing both the at least one first and the at least one second LED sources 20a, 20b as well as the respective optical elements 21 of the second lighting system S2. The supporting element 22 is connected to the respective base body 40a, 40b, 40c, 40d and comprises a cavity or seat, in which the at least one first and the at least one second LED sources 20a, 20b as well as the respective optical elements 21 are housed.

On the front of the supporting element 22 there is at least one output opening 23, at which the at least one optical element 21, for example a biconvex lens, is placed, for the passage and focusing of the light radiation emitted by the at least one first and at least one second LED sources 20a, 20b.

In an embodiment not shown in figure, the supporting element 12 houses a plurality of first and second LED sources 10a, 10b, and at least one optical element 11.

In an embodiment according to the invention, shown in figures la, lb, 2a, 2b, 4b, 5b, the at least one first outlet opening 13 and the at least one second outlet opening 23, respectively of the first and second supporting elements 12, 22, have different geometry. In particular, the at least one outlet opening 13 of the first supporting element 12 extends over a greater area with respect to the area over which the least one outlet opening 23 of the second supporting element 22 is extended.

In a preferred embodiment shown in figures 5a - 6b according to the present invention, each modular base body comprises at least one perimeter edge 42.

In order to form the structure 40, two or more modular base bodies can be reversibly assembled or constrained to each other, preferably in correspondence of the at least one perimeter edge 42.

In particular, as shown for example in figures 4a and 4b, the at least one perimeter edge 42 of a modular base body 40a, 40b, 40c, 40d has a profile shaped so that it can be constrained or assembled, preferably in a reversible manner, to a perimeter edge 42 of a second modular base body 40a, 40b, 40c, 40d, for example by using joining or constraining means 41 such as, for example, one or more connecting means such as, for example, pins, screws, grub screws or other means having similar function.

In an embodiment according to the invention, the modular structure 40 comprises at least two modular base bodies 40a, 40b, 40c, 40d, preferably having the same shape and size. Figures 4a and 4b show for example a possible embodiment of the structure 40 according to the invention, which comprises four modular base bodies 40a, 40b, 40c, 40d shaped as quarters of an annular surface.

Obviously, even if not shown in the figures, further embodiments of the structure 40 are possible, which may include three or two modular base bodies or a single base body.

In a possible embodiment of the invention, the first and second LED sources of the first and second lighting systems SI, S2 are arranged on the respective base bodies so that, when these base bodies are assembled to form the structure 40, the arrangements of the first and second lighting systems SI and S2 follow a predefined pattern.

In particular, in a possible embodiment in which the structure 40 has circular geometry, at least one first LED source 10a and/or at least one second LED source 10b, and preferably a plurality of first and second LED sources 10a, 10b of the first lighting system SI, and at least one first LED source 20a and/or at least one second LED source 20b, and preferably a plurality of first and second LED sources 20a, 20b of the second lighting system S2, are alternately arranged along a first annulus defined along a circumferential pattern PI around the center of the structure 40. Preferably, as shown for example in figure 3 a and 4b, the LED sources of the first and second lighting systems are alternately arranged along the circumferential pattern PI so that between two first LED sources 10a and/or two second LED sources 10b of the first lighting system SI there is at least one first LED source 20a and/or one second LED source 20b of the second lighting system S2.

In addition, according to a possible embodiment, as shown for example in the figures, this configuration is along at least one second annulus. For example, at least one first LED source 10a and/or at least one second LED source 10b and preferably a plurality of first and second LED sources 10a, 10b of the first lighting system SI, and at least one first LED source 20a and/or at least one second LED source 20b, are all alternately arranged along a second annulus defined along a circumferential pattern P2 around the center of the structure 40, around the first annulus.

Preferably, as for example shown in figures 3a and 4b, the LED sources of the first and second lighting systems are alternately arranged so that between two first LED sources 10a and/or two second LED sources 10b of the first lighting system SI there are at least two first LED sources 20a and/or two second LED sources 20b of the second lighting system S2, preferably three first LED sources 20a and/or three second LED sources 20b of the second lighting system S2, even more preferably four first LED sources 20a and/or four second LED sources 20b of the second lighting system S2.

The scialytic lamp 1 according to the invention can be operated in at least two different modes, in particular a first mode in which the light radiation emitted by the first lighting system SI is emitted to illuminate a first operating area A1 as shown in figure la and 2a, and a second mode in which the light radiation emitted by the second lighting system S2 is emitted to illuminate at least a part of a second operating area A2 as shown in figures lb and 2b.

The scialytic lamp 1 according to the invention can be operated in at least two aforesaid different modes, in particular a first mode in which the light radiations emitted by the at least one first and the at least one second LED sources 10a, 10b of the first lighting system SI are mixed to illuminate at least a part of a first operating area Al, as shown in figure la - 2a, and a second mode in which the light radiations emitted by the at least one first and the at least one second LED sources 20a, 20b of the second lighting system S2 are mixed to illuminate at least a part of a second operating area A2, as shown in figures lb - 2b.

In particular, according to a possible embodiment, the first lighting system SI is adapted to illuminate the first area Al, which can have substantially circumferential shape, preferably round or elliptical, and is adapted to illuminate operating areas in surgical field, for example in compliance with the specific international standard CEI-EN-60601-2-41, while the second lighting system S2 is adapted to illuminate the second area A2, which can have different shape and/or size, for example it can have polygonal, preferably rectangular, square or elliptical shape, and is adapted to illuminate operating areas in dental field, for example in compliance with the specific international standard CEI-EN- 9680.

In addition, the first illuminated or operating area Al and the second illuminated or operating area A2 have different illuminance and spectrophotometric characteristics, and in particular differ in terms of illuminance values and other spectrophotometric characteristics. In particular, the area Al has illuminance values between 60 and 120 Kilolux, while the illuminated area A2 has illuminance values between 8 and 60 Kilolux. In an embodiment according to the invention, that can be seen for example in figure 6c, the modular base bodies 40a, 40b, 40c, 40d are provided with at least one heat capture, transfer and dissipation element 44 shaped as a surface, or fin (preferably a plurality of fins), which extends in a direction substantially perpendicular to the extending direction of the respective modular base body 40a, 40b, 40c, 40d.

In an embodiment shown in figure 6c, these heat capture, transfer and dissipation elements can be placed on the base body side having the lighting systems SI, S2 connected thereto.

In a possible embodiment shown in figure 6c, these heat capture, transfer and dissipation elements 44 are positioned on the base body side in correspondence of the LED sources, so as to capture, transfer and dissipate the heat generated by the latter.

In a further possible embodiment not shown in the figure, this dissipation element is arranged near the perimeter edge 42

This heat capture, transfer and dissipation element 44 conveys or directs the heat produced by the LED sources to the outside of the lamp. In an embodiment according to the invention, this at least one heat capture, transfer and dissipation element 44 is obtained in one piece with the modular base body.

In a possible embodiment, the at least one first lighting system SI is suitable for illuminating the area A1 at a certain focusing distance and the at least second lighting system is suitable for illuminating the area A2 at a certain focusing distance.

It should be specified that in the present description and the related claims, 'focusing distance' means the distance between an opening 13, 23 of a respective supporting element 12, 22 and the point belonging to the respective illuminated area (or operating area) Al, A2, illuminated by the light radiation emitted by the respective at least one LED source housed in that supporting element 12, 22, this distance being measured along an axis parallel to the propagation direction of the light radiation emitted by the respective LED source housed in that supporting element 12, 22.

In a possible embodiment, the focusing distance of the first lighting system SI coincides with the focusing distance of the second lighting system S2, so that the lamp 1 can selectively illuminate, at the same focusing distance, an area Al or an area A2 with different geometry and spectrophotometric characteristics.

In a further particular embodiment, the focusing distance of the first lighting system SI does not coincide with the focusing distance of the second lighting system S2, so that the lamp 1 can selectively illuminate, at different focusing distances, an area Al or an area A2 with different geometry and spectrophotometric characteristics.

According to an aspect of the present invention, the first area Al illuminated by the first lighting system SI and the second area A2 illuminated by the second lighting system S2 lie in correspondence of a same axis X, preferably in correspondence of a main projection axis (or central projection axis) of light radiation.

According to an aspect, said axis X is an axis of symmetry of the first and second illuminated areas, as can be seen for example by comparing the figures la, lb, 2a, 2b. According to an aspect, said axis X corresponds to the central axis of the lamp and preferably to the central axis of the lamp structure 40 formed, for example, by two or more base bodies constrained to each other.

In an embodiment shown in figure 4b, the scialytic lamp 1 comprises an inner arm 48 constrained between two modular base bodies 40a, 40b, 40c, 40d or else to an end of a base body 40a, 40b, 40c, 40d, and this arm 48 acts as a supporting element for the scialytic lamp 1 and extends to the outside of the lamp, for example towards an outer arm (not shown in the figures) that is connected thereto by means of a joint (not shown in the figures) and that forms therewith a coupling useful to combine a handle (also not shown in the figures) necessary to orient the lamp towards the focusing direction during use.

In a possible embodiment, a handle element 45, connected to an arm outside of the lamp 1 for example by means of a joint or interlock, can be constrained between two or more adjacent modular base bodies 40a, 40b, 40c, 40d, so that the handle element 45 is adapted to orient the lamp in the focusing direction during use.

In an embodiment this handle element 45 can be connected to an extended portion of the inner arm 48, in order to create a structural connection between the handle element 45, the inner arm 48 and an outer arm (not shown in figures).

In an embodiment, this handle element 45 can also act as a container in which a camera is accommodated, useful for capturing high-resolution images from the portion of the illuminated area A1 or A2.

In a possible embodiment shown in figures 3 a and 3b, in the front part of the lamp there is a covering element 70 provided with openings in correspondence of the openings 13, 23 of the supporting elements 12, 22.

The covering element 70 is fixed to the structure 40 so that only the optical elements 11 and 21 are left uncovered in correspondence of the openings 13, 23 of the supporting elements 12, 22 of the respective LED sources.

The lamp 1 according to the invention comprises a back cover 80 shown in figure 3b and connected to the structure of the scialytic lamp 1 so as to leave uncovered the part radiating the heat that is captured, transferred (and therefore conveyed) and dissipated by the fins 44 and then emitted to the environment outside the lamp by the at least one base body 40a, 40b, 40c, 40d.

The lamp 1 according to the invention comprises a front covering frame 81 which is able to not interfere with the light radiation emitted by the LED sources and which supports the transparent plate 75 adapted to protect the optical elements 11, 21 through which the light radiation come out.

A method for using the scialytic lamp 1 according to the invention will be described hereafter.

At least one operating area A1 or A2 can be illuminated by means of the LED scialytic lamp 1 according to the invention, by activating control means U to alternatively select a first operating mode, in which the light radiation emitted by the at least one first optical system SI illuminates at least part of a first operating area Al, and a second operating mode in which the light radiation emitted by the at least one second optical system S2 illuminates at least part of a second operating area A2.

The method comprises the step of selecting a first operating mode by activating the control means U to alternatively select a first operating mode, in which the light radiations emitted by the at least one first and one second LED sources 10a, 10b, preferably having different spectrophotometric characteristics, of the first optical system SI are adjustably mixed by the operator to illuminate at least part of the first operating area AL

The method further comprises the step of selecting a second operating mode by activating the control means U to alternatively select a second operating mode, in which the light radiations emitted by the at least one first and at least one second LED source 20a, 20b, preferably having different spectrophotometric characteristics, of the second optical system S2 are adjustably mixed by the operator, to illuminate at least part of the second operating area A2.

The intensity of the light radiation incident on the operating area Al or A2 to be illuminated is adjusted by adjusting the intensities of the radiations emitted by the at least one first source 10a or 20a and the at least one second source 10b or 20b of the first or second lighting systems SI or S2, respectively.

At least one first and one second LED sources are adjusted dependently of each other according to an inverse dependency relationship.

In other words, to adjust the intensity of the light radiation incident on the operating area Al or A2, the intensity of the light radiation emitted by the at least one first LED source 10a or 20a is increased and/or the intensity of the light radiation emitted by the at least one second LED source 10b or 20b is decreased, or vice versa.

This adjustment of the intensity of the light radiation emitted by the LED sources is carried out, for example, by the activation of said control means U, by adjusting the electric voltage and/or adjusting the intensity of electric current supplied both to the LED sources 10a, 10b of the first lighting system SI and to the LED sources 20a, 20b of the lighting system S2 of the scialytic lamp 1.

What described and/or claimed herein referring to the lamp may be referred to the method, and vice versa.

Claims

1. LED scialytic lamp (1) comprising:

- at least one first lighting system (SI) comprising at least one first LED source (10a) and at least one respective optical element (11), and at least one second LED source (10b) and at least one respective optical element (11), for focusing the light radiation emitted by the first lighting system (SI) on at least part of a first operating area (Al);

- at least one second lighting system (S2) comprising at least one first LED source (20a) and at least one respective optical element (21), and at least one second LED source (20b) and at least one respective optical element (21), for focusing the light radiation emitted by the second lighting system (S2) on at least part of a second area (A2);

- a structure (40) comprising at least one base body (40a, 40b, 40c, 40d) on which at least one first LED source (10a) and at least one second LED source (10b) of said first lighting system (SI), and at least one first LED source (20a) and at least one second LED source (20b) of said second lighting system (S2), are arranged;

said lamp further comprising control means (U) configured to alternatively select at least one first operating mode in which the light radiation emitted by said at least one first LED source (10a) and said at least one second LED source (10b) of said at least one first lighting system (SI) illuminates at least part of a first operating area (Al), and at least one second operating mode in which the light radiation emitted by said at least one first LED source (20a) and said at least one second LED source (20b) of said at least one second lighting system (S2) illuminates at least part of a second operating area (A2).

2. Scialytic lamp (1) according to claim 1, wherein said first lighting system (SI) and said second lighting system (S2) have different optical characteristics, preferably said at least first sources (10a, 20a) and said at least second sources (10b, 20b) have different optical characteristics.

3. Scialytic lamp (1) according to one of the preceding claims, wherein said at least first sources (10a, 20a) emit light radiation in a wavelength range comprised in the visible light spectrum, and said at least second LED sources (10b, 20b) emit light radiation in a wavelength range comprised in the visible light spectrum, the latter wavelength range being different from the wavelength range of the light radiation emitted by said at least first LED sources (10a, 20a).

4. Lamp according to any one of the preceding claims, wherein the at least one first LED source (10a) and the at least one second source (10b) of the first lighting system (SI) have spectrophotometric characteristics different from each other and/or the at least one first LED source (20a) and the at least second source (20b) of the second lighting system (S2) have spectrophotometric characteristics different from each other.

5. Scialytic lamp (1) according to one of the preceding claims, wherein said control means (U) are of electronic type, preferably said electronic-type control means comprising at least one control unit equipped with a processor.

6. Scialytic lamp (1) according to one of the preceding claims, characterized in that said first lighting system (SI) emits light radiation with CRI greater than 95, preferably greater than 98, and color temperature between 4000K and 5500K.

7. Scialytic lamp (1) according to one of the preceding claims, characterized in that said second lighting system (S2) emits light radiation with CRI greater than 90, preferably greater than 95, and color temperature between 3000K and 6000K.

8. Scialytic lamp (1) according to one of the preceding claims, wherein each base body (40a, 40b, 40c, 40d) comprises a plurality of said at least first LED sources (10a) and a plurality of said at least second LED sources (10b) of said first lighting system (SI) and respective optical elements (11), and at least one plurality of said at least first LED sources (20a) and at least one plurality of said at least second LED sources (20b) of said second lighting system (S2) and respective optical elements (21).

9. Scialytic lamp (1) according to one of the preceding claims, comprising at least one supporting element (12) to support the at least one first LED source (10a) and/or the at least one second LED source (10b) as well as the at least one respective optical element (11) of said first lighting system (SI), and said first supporting element (12) is connected to said at least one base body (40a, 40b, 40c, 40d), and comprises at least one outlet opening (13) at which the at least one optical element (11) for the passage of the light radiation emitted by either said at least one first LED source (10a) and/or said at least one second LED source (10b) of said first lighting system (SI), is arranged .

10. Scialytic lamp (1) according to one of the preceding claims, comprising at least one supporting element (22) to support the at least one first LED source (20a) and/or the at least one second LED source (20b) as well as the at least one respective optical element (21) of said second lighting system (SI), and said first supporting element (22) is connected to said at least one base body (40a, 40b, 40c, 40d), and comprises at least one outlet opening (23) at which the at least one optical element (21) for the passage of the light radiation emitted by either said at least one first LED source (20a) and/or said at least one second LED source (20b) of said second lighting system (S2), is arranged.

11. Scialytic lamp (1) according to claim 9, wherein said supporting element (12) houses a plurality of first LED sources (10a) and/or a plurality of second LED sources (10b) and respective optical elements (11) of said first lighting system (SI).

12. Scialytic lamp (1) according to claim 10, wherein said supporting element (22) houses a plurality of first LED sources (20a) and/or a plurality of second LED sources (20b) and respective optical elements (21) of said second lighting system (S2).

13. Scialytic lamp (1) according to one of the preceding claims wherein said at least one outlet opening (13) of the supporting element (12) for at least one LED source (10a, 10b) of the first lighting system (SI) has shape and/or size different from said at least one outlet opening (23) of the supporting element (22) for at least one LED source (20a, 20b) of the second lighting system (S2).

14. Scialytic lamp (1) according to any one of the preceding claims, characterized in that two or more base bodies (40a, 40b, 40c, 40d) are configured to be reversibly assembled or constrained to each other, preferably in correspondence of at least one perimeter edge (42) in order to form said structure (40).

15. Scialytic lamp (1) according to claim 14, characterized in that said base bodies are modular elements.

16. Scialytic lamp (1) according to claim 14 or 15, characterized by comprising at least two modular base bodies (40a, 40b, 40c, 40d) equal to each other.

17. Scialytic lamp (1) according to one of the preceding claims, characterized in that the light radiation emitted by the first lighting system (SI) and the light radiation emitted by the second lighting system (S2) both intersect a same axis (X), and preferably intersect a main projection axis of light radiation.

18. Scialytic lamp (1) according to one of the preceding claims, characterized in that the first area (Al) illuminated by the first lighting system (SI) has shape and/or size different from the second area (A2) illuminated by the second lighting system (S2).

19. Scialytic lamp (1) according to one of the preceding claims, characterized in that the first area (Al) illuminated by the first lighting system (SI) and the second area (A2) illuminated by the second lighting system (S2) lie in correspondence of a same axis (X), preferably in correspondence of a main projection axis of light radiation.

20. Scialytic lamp (1) according to one of the preceding claims, characterized in that the first illuminated area (Al) is substantially circumferential, preferably round or elliptical, and the second illuminated area (A2) is substantially polygonal, preferably rectangular, square or elliptical.

21. Scialytic lamp (1) according to one of the preceding claims, characterized in that the first illuminated area (Al) and the second illuminated area (A2) have respective illuminance values and spectrophotometric characteristics different from each other.

22. Lamp according to any one of the preceding claims, characterized by comprising at least one heat dissipation element (44), preferably comprising at least one fin, said heat dissipation element being arranged on said base body (40) in correspondence of at least one LED source (10a, 10b, 20a, 20b).

23. Method of illuminating at least one operating area (Al, A2) by means of a LED scialytic lamp (1) according to any one of the preceding claims, comprising the step of activating said control means (U) to alternatively select a first operating mode in which the light radiation emitted by said at least one first lighting system (SI) illuminates at least part of a first operating area (Al), and a second operating mode in which the light radiation emitted by said at least one second lighting system (S2) illuminates at least part of a second operating area (A2).

24. Method according to claim 23, comprising the step of activating said control means (U) to alternatively select a first operating mode in which the light radiation emitted by said at least one first and at least one second LED sources (10a, 10b) of said at least one first optical system (SI) are adjustably mixed by the operator, in order to illuminate at least part of a first operating area (Al), and a second operating mode in which the light radiation emitted by said at least one first and at least one second LED sources (20a, 20b) of said at least one second optical system (S2) are adjustably mixed by the operator, in order to illuminate at least part of a second operating area (A2).

25. Method according to claim 23 or 24, wherein the intensity of the light radiation incident on the operating area (Al, A2) to be illuminated is adjusted by adjusting the intensities of the radiation emitted by either the first or the second lighting system (SI, S2) respectively, in a mutually dependent way according to an inverse dependency relationship, preferably by increasing the intensity of the light radiation emitted by the at least one first LED source (10a, 20a) as the intensity of the light radiation emitted by the at least one second LED source (10b, 20b) of the respective lighting systems (SI, S2) decreases, and vice versa.

26. Method according to claim 25, wherein the intensity of the light radiation emitted by the LED sources is adjusted by the activation of said control means (U) by adjusting the voltage and/or intensity of electric current supplied both to the LED sources (10a, 10b) of the first lighting system (SI) and to the LED sources (20a, 20b) of the second lighting system (S2) of the scialytic lamp (1).