WO2015144847A1

WO2015144847A1 - Projector with directional reflectors for leds

Info

Publication number: WO2015144847A1
Application number: PCT/EP2015/056635
Authority: WO
Inventors: Flavio Mauro Sangiorgio; Andrea Giuseppe RIERA
Original assignee: Fael S.P.A.
Priority date: 2014-03-28
Filing date: 2015-03-26
Publication date: 2015-10-01
Also published as: EP3132189A1; EP3132189B1

Abstract

A method is described for constructing an asymmetrical reflector (1), comprising a first phase to construct a rear portion (2) from a first rotationally symmetrical solid (P) with respect to an axis of direction (V), a second phase to construct a front portion (3) from a second rotationally symmetrical solid (E) with respect to a geometrical axis (A), and a third phase to join together the rear portion (2) and the front portion (3) of said asymmetrical reflector (1).

Description

"Projector with directional reflectors for LEDs"

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DESCRIPTION

The present invention relates to a projector with directional reflectors for LEDs.

There are projectors for LEDs as described in WO2013144005 entitled to the Applicant, comprising a reflector which is geometrically constructed through rotational solids. Disadvantageously, it is not possible to orient the direction of the luminous flux of the individual LEDs of the plurality of LEDs forming the geometrical matrix of LEDs of the projector.

It is the object of the present invention to provide a projector with directional reflectors for LEDs which may easily and simply orient a light beam of projector 10 as desired by a user, create a desired form of light beam of the projector as desired by a user, by simply constructing at least one directional reflector for LEDs which is capable of directing the light beam of the individual LED and/or scattering it conveniently as desired by a user.

In accordance with the invention, such an object is achieved with a method for constructing an asymmetrical reflector according to claim 1.

These and other features of the present invention will become more apparent from the following detailed description of a non-limiting practical embodiment thereof shown in the accompanying drawings, in which:

Figure 1 shows a front bottom perspective view of a reflector according to the present invention;

Figure 2 shows a rear top perspective view of the reflector;

Figure 3 shows a bottom plan view of the reflector;

Figure 4 shows a sectional view according to line IV- IV in figure 3, with geometrical construction lines of a reflecting inner surface of the reflector;

Figure 5 shows the sectional view in figure 4, with lines representing light rays;

Figure 6 shows a cutaway perspective view of the geometrical reflector in figure 1 ;

Figure 7 shows a front plan view of the reflector;

Figure 8 shows a rear plan view of the reflector;

Figure 9 shows a side plan view of the reflector;

Figure 10 shows a first phase of a geometrical construction of the reflecting surface of the reflector, with lines representing light rays;

Figure 11 shows a perspective view of the first phase of the geometrical construction in figure 10;

Figure 12 shows a perspective view of a step of the first phase of the geometrical construction of the reflecting surface of the reflector;

Figure 13 shows a perspective view of another step of the first phase of the geometrical construction of the reflecting surface of the reflector;

Figure 14 shows a front bottom perspective view of an alternative reflector according to the present invention;

Figure 15 shows a top plan view of the alternative reflector;

Figure 16 shows a bottom plan view of the alternative reflector;

Figure 17 shows a side plan view of the alternative reflector;

Figure 18 shows a front plan view of the alternative reflector;

Figure 19 shows a rear plan view of the alternative reflector;

Figure 20 shows a perspective view of a step of the first phase of the geometrical construction of a reflecting surface of the alternative reflector;

Figure 21 shows a bottom perspective view of a further alternative reflector with controllable slots;

Figure 22 shows a projector which mounts a plurality of reflectors according to the present invention, in a first position for illuminating;

Figure 23 shows the projector with the plurality of reflectors in a second position for illuminating.

With reference to the above-listed figures, and in particular to figures 22-23, a projector 10 will be seen, comprising a plurality of LEDs 20 mounted on a horizontal surface 15 which is flat. An asymmetrical reflector 1 is mounted in correspondence with each LED 20 of said plurality of LEDs 20.

Each asymmetrical reflector 1 of a plurality of asymmetrical reflectors 1 angularly deflects the light rays 21-25 emitted by said LED 20 of said plurality of LEDs 20.

A light beam of LED 20 comprises said light rays 21-25. The assembly of light beams of the LEDs 20 creates a light beam of projector 10 which is formed by the diffraction and interference between the individual light beams of the LEDs 20.

The LEDs 20 emit the maximum luminous intensity of the light beam of LED 20 in the vertical direction along a vertical axis Y, perpendicular to the horizontal surface 15. One of said vertical axis Y is in correspondence with each LED 20 of said plurality of LEDs 20. From 50% to 80% of the luminous intensity of the light beam of LED 20 is emitted within an angle of 60° with respect to the vertical axis Y.

As shown in figures 1-2, 22-23, said asymmetrical reflector 1 is rotatably mounted with the horizontal surface 15 through the upper inlet opening 5 thereof which lies on the horizontal surface 15, so that said asymmetrical reflector 1 is adapted to rotate about the vertical axis Y by passing from at least one first position for illuminating to at least one second position for illuminating.

As shown in figures 1-2, the asymmetrical reflector 1 comprises, on the lower flange thereof, two through openings 30 adapted to allow a fixing element, such as for example a screw, to pass between the asymmetrical reflector 1 and the horizontal surface 15 to fix advantageously at least one or more positions for illuminating the asymmetrical reflector 1. The horizontal surface 15 includes screw holes to fix at least one first position for illuminating and at least one second position for illuminating of the asymmetrical reflector 1.

The light beam of each individual LED 20 may be advantageously oriented to obtain a light beam of projector 10 as desired by a user in an easy and simple manner by orienting the individual asymmetrical reflectors 1 by rotating them about the vertical axis Y.

Even more advantageously, a light beam of a desired form of projector 10 may be created in an easy and simple manner by autonomously orienting the individual asymmetrical reflectors 1 by rotating them individually and autonomously about their vertical axis Y, so that the diffraction, interference and contribution in general of all the individual asymmetrical reflectors 1 may create an overall luminous figure of the light beam of projector 10 in a distant field of the form desired by the user. Therefore, it is extremely simple and advantageous for the final user to also create a figure of interference and diffraction as desired by simply rotating the individual asymmetrical reflectors 1 of the plurality of asymmetrical reflectors 1, each mounted on every corresponding LED 20 of the plurality of LEDs 20.

As shown in figures 1-9, said asymmetrical reflector 1 for LEDs 20 comprises the upper inlet opening 5 and a lower outlet opening 6.

The plurality of light rays 21-25 emitted by LED 20 are incident on an inner surface 4 of the asymmetrical reflector 1. The inner surface 4 comprising an inner surface 41 of a rear portion 2 of the asymmetrical reflector 1 and an inner surface 42 of a front portion 3 of the asymmetrical reflector 1 joined together by means, for example, of riveting or welding or gluing. The asymmetrical reflector 1 may be directly molded or electroformed in one single piece.

Three phases are provided to construct the asymmetrical reflector 1 according to the present invention.

A first phase to construct a rear portion 2 of the asymmetrical reflector 1 , a second phase to construct a front portion 3 of the asymmetrical reflector 1 and a third phase to join together the rear portion 2 and the front portion 3 of said asymmetrical reflector 1.

The first phase to construct the rear portion 2 of the asymmetrical reflector 1 comprises the following steps.

As shown in figures 10-11, a first step provides to construct a first rotationally symmetrical solid P by rotating a first geometrical plane curve 11, which is a parabola, about an axis of direction V.

Said first rotationally symmetrical solid P, which is a paraboloid, comprising a focus 100.

The asymmetrical reflector 1 will be placed over LED 20 so that LED 20 is placed in correspondence with focus 100 of the first rotationally symmetrical solid P.

A second step provides to identify a vertical axis Y passing by said focus 100 and being perpendicular to the horizontal surface 15 which mounts the LEDs 20, and to tilt the axis of direction V by a first angle a with respect to the vertical axis Y, as shown in figure 10.

Said first angle a lies on a first geometrical plane 14 identified by the vertical axis Y and the axis of direction V.

First light rays 21-22 of said plurality of light rays 21-25 are incident on an inner surface 41 of the rear portion 2 of the asymmetrical reflector 1 and are deflected in order to be parallel to each other and parallel to the axis of direction V.

The first angle a on the first geometrical plane 14 is selected so as to be in the range from 0° to 80° sexagesimal so as to deflect the light beam of LED 20, so that the first light rays 21-22 are parallel with the axis of direction V, as shown in figure 5.

As shown in figures 10-12, a third step provides to cut the first rotationally symmetrical solid P along an upper cutting line X lying on the horizontal surface 15 and to cut it again along a lower cutting line C lying on a geometrical horizontal plane 16 being parallel to the horizontal surface 15 so as to create a rotationally symmetrical solid frustum T comprising a hollow upper base 51 lying on the horizontal surface 15 and a hollow lower base 52 lying on the geometrical horizontal plane 16, as shown in figure 10.

Cutting the paraboloid P with the horizontal surface 15 so that the focus 100 of paraboloid P lies on the horizontal surface 15 advantageously simplifies the placement of the asymmetrical reflector 1 over LED 20 when the upper inlet opening 5 of the asymmetrical reflector 1 is rotatably mounted with the horizontal surface 15.

By so cutting the tilted paraboloid P, a rotationally symmetrical solid frustum T is created which is a paraboloid frustum T, as shown in figure 12.

Said paraboloid frustum T comprising a hollow upper base 1 lying on the horizontal surface 15 and a hollow lower base 52 lying on the geometrical horizontal plane 16.

Said hollow upper base 51 has a smaller area than said hollow lower base 52 so as to advantageously diffract the light beam of LED 20.

Said geometrical horizontal plane 16 is placed at a distance 105 from said horizontal surface 15. Said distance 105 is measured along the vertical axis Y. Said distance 105 is greater than another distance 101 between said focus 100 and an intersection D on the first geometrical plane 14 between the vertical axis Y and the geometrical plane curve 11. Thereby, a light ray of greater intensity directed along the vertical axis Y is advantageously deflected by the inner surface 41 of the rear portion 2 of the asymmetrical reflector 1 so that it advantageously becomes parallel to the axis of direction V.

The paraboloid frustum T has very large dimensions with respect to LED 20. If such dimensions of the asymmetrical reflector 1 were maintained, then many LEDs 20 could not be inserted on the horizontal surface 15, since most of the space would be occupied by the enormous dimensions of the paraboloid frustum T. Reducing the number of LEDs 20 on the horizontal surface 15 of projector 10 would have repercussions on the maximum luminous intensity which could reach the light beam of projector 10. -

A fourth step provides to cut the rotationally symmetrical solid frustum T along a cutting line coincident with the axis of direction V lying on a geometrical cutting plane 17 so as to advantageously reduce the dimensions of the paraboloid frustum T.

Said geometrical cutting plane 17 is perpendicular to the first geometrical plane 14. In figures 4-5, 8, 10, the geometrical cutting plane 17 is identified by the axis of direction V. In figure 13, said geometrical cutting plane 17 is identified in a perspective view. The geometrical cutting plane 17 is precisely selected because it passes by the focus 100 of paraboloid P and thus allows the position of the focus 100 of the paraboloid to be identified in an extremely advantageous and simple manner, focus 100 lying on the horizontal surface 15 where the upper inlet opening 5 of the asymmetrical reflector 1 is also located.. The simplicity in identifying focus 100 allows the asymmetrical reflector 1 to be placed by mounting it over

LED 20 so that LED 20 is exactly in correspondence with focus 100 without wasting time in further calibrations, which in the state of the art are instead difficult and not very accurate.

Said cut performed by means of the geometrical cutting plane 17 advantageously reduces the dimensions of the paraboloid frustum T, thus allowing the asymmetrical reflector 1 to easily rotate about the vertical axis Y and allows the horizontal surface 15 of projector 10 to be covered with a greater number of asymmetrical reflectors 1 according to the present invention.

The second phase to construct the front portion 3 of the asymmetrical reflector 1 comprises the following steps.

A first step provides to construct a second rotationally symmetrical solid E by rotating a second geometrical plane curve 12, which is an ellipse, about a geometrical axis A of the second geometrical plane curve 12, which corresponds to a larger axis of the ellipse. Said second rotationally symmetrical solid E is an ellipsoid and comprises two foci 201, 202.

A second step provides to place a first focus 201 of said at least two foci 201, 202 in correspondence with said focus 100 of the first rotationally symmetrical solid P.

A third step provides to tilt the geometrical axis A by a second angle β on the first geometrical plane 14 with respect to the axis of direction V.

Second light rays 23-25 of said plurality of light rays 21-25 are incident on an inner surface 42 of the front portion 3 of the asymmetrical reflector 1 and are deflected in order to pass by a second focus 202 of said two foci 201, 202 of the second rotationally symmetrical solid E.

Said second angle β on the first geometrical plane 14 is selected so as to be in the range from 0° to 80° sexagesimal so that said light rays 21-25 advantageously maintain a maximum intensity of a light beam of LED 20 in the direction of the axis of direction V.

A fourth step provides to cut the second rotationally symmetrical solid E along the upper cutting line X lying on the horizontal surface 15 and along the lower cutting line C lying on the geometrical horizontal plane 16, so as to create a second rotationally symmetrical solid frustum comprising a hollow upper base lying on the horizontal surface 15 and a hollow lower base lying on the geometrical horizontal plane 16. Thereby, the dimensions of the ellipsoid are advantageously reduced.

A fifth step provides to cut the second rotationally symmetrical solid frustum along the cutting line coincident with the axis of direction V lying on a geometrical cutting plane 17 so as to easily and advantageously join together the two portions 2, 3 of the asymmetrical reflector 1. The geometrical cutting plane 17 advantageously also passes by the first focus 201 of the ellipsoid E, thus allowing the asymmetrical reflector 1 to be advantageously simply placed over LED 20 while keeping LED 20 in correspondence with the foci 100, 201. The third phase provides to join together the rear portion 2 and the front portion 3 of said asymmetrical reflector 1 along the geometrical cutting plane 17.

A joining line 7 is shown in figures 1-2, 6, 8. Said joining line 7 identifies where the two portions 2, 3 of the asymmetrical reflector 1 are joined together by means, for example, of riveting, welding or gluing.

Using two rotationally symmetrical solids P, E with foci 100, 201, 202 advantageously allows the asymmetrical reflector 1 to be simply placed over LED 20 mounted on the horizontal surface 15, and the foci 100, 201 of the asymmetrical reflector 1 to be advantageously and extremely simply identified. This advantageously allows a significant reduction of the calibration time for identifying the focus where the LED is to be placed. The geometry of the asymmetrical reflector 1 advantageously and easily allows LED 20 to be placed in correspondence with the focus 100 of the rear portion 2 corresponding to the focus 201 of the rear portion 3 of the asymmetrical reflector 1, so that the light beam of LED 20 may be deflected by the asymmetrical reflector 1 in the best manner possible provided by the geometry of the inner surface 4 of the asymmetrical reflector 1.

When also considering that there is a plurality of LEDs 20 on the horizontal surface 15, it is extremely advantageous to simply mount the asymmetrical reflectors 1 over the respective LEDs 20 without the need to waste time in conveniently calibrating the position of the foci 100, 201, considering that the foci remain exactly on the horizontal surface 15 where the upper inlet opening 5 of the asymmetrical reflector 1 lies.

Alternatively, as shown in figure 21, an alternative asymmetrical reflector 1 comprises two elongate through openings 30 adapted to allow a fixing element, such as for example a screw, to pass between the asymmetrical reflector 1 and the horizontal surface 15 to advantageously fix a plurality of positions for illuminating the asymmetrical reflector 1.

It is again possible to provide for the asymmetrical reflector 1 to be rotatably mountable with the horizontal surface 15 by means of a spring fixing element so that said asymmetrical reflector 1 may be rotated about the vertical axis Y from 0° to 360° sexagesimal to allow the user to direct the light beam of the individual LED 20 as best desired and so as to give the user ample possibility to advantageously create a plurality of forms of the light beam of projector 10 as desired by the user.

Again alternatively, the method for constructing the asymmetrical reflector 1 provides for the first geometrical plane curve 11 to be selected from a parabola, an ellipse, a hyperbola and a conic, and for the second geometrical plane curve 12 to be selected from an ellipse, a hyperbola and a conic.

A further alternative again provides for the second phase to construct the front portion 3 of the asymmetrical reflector 1 in the first step to provide to construct a second rotationally symmetrical solid E by rotating a second geometrical plane curve 12, which is an ellipse, about a geometrical axis A of the ellipse, which is a smaller axis of the ellipse, as shown in the alternative asymmetrical reflector 1 in figures 14-20.

Again, in said further alternative, the asymmetrical reflector 1 has the first geometrical plane curve 11, which is a first ellipse, and has the second geometrical plane curve 12, which is a second ellipse.

The plurality of light rays 21-25 emitted by LED 20, placed in correspondence with focus 100, 201, is incident on the inner surface 4 of the asymmetrical reflector 1.

First light rays 21-22 are incident on an inner surface 41 of the rear portion 2 of the asymmetrical reflector 1 and are deflected in order to pass by a second focus of said at least one focus 100 of the first rotationally symmetrical solid P.

Second light rays 23-25 are incident on an inner surface 42 of the front portion 3 of the asymmetrical reflector 1 and are deflected in order to pass by a second focus 202 of said at least two foci 201, 202 of the second rotationally symmetrical solid E.

Said first angle a on the first geometrical plane 14 being in the range from 0° to 80° sexagesimal, while said second angle β on the first geometrical plane 14 being selected so as to be in the range from 0° to 80° sexagesimal, so that said light rays 21-25 advantageously reduce the intensity of the light beam of LED 20, thus scattering the light rays 21-25 in directions in the range from 0° to 90° with respect to the direction of the axis of direction V. Using said alternative asymmetrical reflector 1 allows a plurality of asymmetrical reflectors 1 and of alternative asymmetrical reflectors 1 to be installed on projector 10, so that the final user may, by simply rotating the asymmetrical reflectors 1 over the individual LEDs 20, create a desired light beam of projector 10 by selecting it from a plurality of possible light beams of projector 10, because the individual asymmetrical reflectors 1 may be rotated about the vertical axis Y independently and autonomously from one another.

Again, a further alternative provides for the method of constructing the asymmetrical reflector 1 to comprise a first phase to construct the rear portion 2 of the asymmetrical reflector 1 comprising a fourth step which provides to cut the rotationally symmetrical solid frustum T along a cutting line which passes by the focus 100 of the rotationally symmetrical solid P, said cutting line lying on a geometrical cutting plane 17 so as to advantageously reduce the dimensions of the paraboloid frustum T.

Said geometrical cutting plane 17 is perpendicular to the first geometrical plane 14. The geometrical cutting plane 17 is identified by the axis of direction V. The geometrical cutting plane 17 is precisely selected because it passes by the focus 100 of paraboloid P and therefore allows the position of the focus 100 of the paraboloid to be identified in an extremely advantageous and simple manner, focus 100 lying on the horizontal surface 15 where the upper inlet opening 5 of the asymmetrical reflector 1 is also located. The simplicity in identifying focus 100 allows the asymmetrical reflector 1 to be placed by mounting it over LED 20 so that LED 20 is exactly in correspondence with focus 100 without wasting time in further calibrations, which in the state of the art are instead difficult and not very accurate.

Another alternative provided by the present invention is that of providing two geometrical cutting planes 17, 27, a first geometrical cutting plane 17 and a second geometrical cutting plane 27 (not shown in the figures).

Said other alternative provides for the method of constructing the asymmetrical reflector 1 to comprise a fourth step which provides to cut the rotationally symmetrical solid frustum T along a cutting line which passes by the focus 100 of the rotationally symmetrical solid P, said cutting line lying on a first geometrical cutting plane 17 so as to advantageously reduce the dimensions of the paraboloid frustum T.

Said first geometrical cutting plane 17 is tilted by a third angle γ with respect to the first geometrical plane 14. The first geometrical cutting plane 17 is precisely selected because it passes by the focus 100 of paraboloid P and therefore allows the position of the focus 100 of the paraboloid to be identified in an extremely advantageous and simple manner, focus 100 lying on the horizontal surface 15 where the upper inlet opening 5 of the asymmetrical reflector 1 is also located. The simplicity in identifying focus 100 allows the asymmetrical reflector 1 to be placed by mounting it over LED 20 so that LED 20 is exactly in correspondence with focus 100 without wasting time in further calibrations, which in the state of the art are instead difficult and not very accurate.

Said other alternative provides for the second phase to construct the front portion 3 of the asymmetrical reflector 1 to comprise a fifth step which provides to cut the second rotationally symmetrical solid frustum along a cutting line lying on the second geometrical cutting plane 27 so as to easily and advantageously join together the two portions 2, 3 of the asymmetrical reflector 1. The second geometrical cutting plane 27 advantageously passes both by focus 100 of the first rotationally symmetrical solid P, and by the first focus 201 of the second rotationally symmetrical solid E, thus allowing the asymmetrical reflector 1 to be advantageously simply placed over LED 20 while keeping LED 20 in correspondence with the foci 100, 201. The second geometrical cutting plane 27 is tilted by a fourth angle δ with respect to the first geometrical cutting plane 17. Cutting the front portion 3 with the second geometrical cutting plane 27 and the rear portion 2 with the first geometrical cutting plane 17 advantageously allows an increased possibility to construct asymmetrical reflectors 1 according to the present invention. Said third angle γ being from 0° to 90° and said forth angle δ being from 0° to 90°, and not shown in the figures.

Claims

1. Method for constructing an asymmetrical reflector (1), comprising a first phase to construct a rear portion (2) of the asymmetrical reflector (1), a second phase to construct a front portion (3) of the asymmetrical reflector (1) and a third phase to joint together the rear portion (2) and the front portion (3) of said asymmetrical reflector (1),

the first phase to construct the rear portion (2) of the asymmetrical reflector (1) comprises following steps,

a first step provides to construct a first rotationally symmetrical solid (P) by rotating a first geometrical plane curve (11) about an axis of direction

(V), said first rotationally symmetrical solid (P) comprises at least one focus (100),

a second step provides to identify a vertical axis (Y) passing by said at least one focus (100) and being perpendicular to a horizontal surface (15) which mounts LEDs (20) and to tilt the axis of direction (V) by a first angle

(a) with respect to the vertical axis (Y), said first angle (a) lies on a first geometrical plane (14) identified by the vertical axis (Y) and the axis of direction (V),

a third step provides to cut the first rotationally symmetrical solid (P) along a upper cutting line (X) lying on the horizontal surface (15) and along a lower cutting line (C) lying on a geometrical horizontal plane (16) being parallel to the horizontal surface (15) adapted to create a rotationally symmetrical solid frustum (T) comprising a hollow upper base (51) lying on the horizontal surface (15) and a hollow lower base (52) lying on the geometrical horizontal plane (16),

a fourth step provides to cut the rotationally symmetrical solid frustum (T) along a first cutting line passing by said at least one focus (100) lying on a geometrical cutting plane (17), said geometrical cutting plane (17) being tilted by a third angle (γ) with respect to the first geometrical plane (14), the second phase to construct the front portion (3) of the asymmetrical reflector (1) comprises following steps,

a first step provides to construct a second rotationally symmetrical solid (E) by rotating a second geometrical plane curve (12) about a geometrical axis (A) of the second geometrical plane curve (12), said second rotationally symmetrical solid (E) comprising at least two foci (201, 202), a second step provides to place a first focus (201) of said at least two foci (201, 202) in correspondence with said at least one focus (100) of the first rotationally symmetrical solid (P),

a third step provides to tilt the geometrical axis (A) by a second angle (β) on the first geometrical plane (14) with respect to the axis of direction (V),

a fourth step provides to cut the second rotationally symmetrical solid (E) along the upper cutting line (X) lying on the horizontal surface (15) and along the lower cutting line (C) lying on the geometrical horizontal plane (16) adapted to create a second rotationally symmetrical solid frustum comprising a hollow upper base lying on the horizontal surface (15) and a hollow lower base lying on the geometrical horizontal plane (16),

a fifth step provides to cut the second rotationally symmetrical solid frustum along a second cutting line passing by said first focus (201) and lying on a second geometrical cutting plane (27) which is tilted by a fourth angle (δ) with respect to the geometrical cutting plane (17),

the third phase to joint together the rear portion (2) and the front portion (3) of said asymmetrical reflector (1) along the geometrical cutting plane (17, 27), characterized in that

said hollow upper base (51) of the rotationally symmetrical solid frustum (T) comprising an area smaller than said hollow lower base (52) of the rotationally symmetrical solid frustum (T),

said geometrical horizontal plane (16) placed at a distance (105) from said horizontal surface (15),

said distance (105) measured along a vertical axis (Y), said distance (105) is greater than another distance (101) between said at least one focus (100) and an intersection (D) on the first geometrical plane (14) between the vertical axis (Y) and the geometrical plane curve (11).

2. Method according to claim 1, characterized in that the first geometrical plane curve (11) is selected from a parabola, a parabola, an ellipse, a hyperbola, a conic and that the second geometrical plane curve (12) is selected from an ellipse, a hyperbola and a conic.

3. Method according to any one of the claims 1 or 2, characterized in that said geometrical cutting plane (17) overlaps on said second geometrical cutting plane (27) and the first cutting line overlaps on the second cutting line and overlaps on the axis of direction (V).

4. Asymmetrical reflector (1) for LED (20) suitable for angularly deflecting light rays (21-25) emitted by said LED (20), said asymmetrical reflector (1) constructed according to any one of the claims 1-3, wherein the asymmetrical reflector (1) comprises an upper inlet opening (5) and a lower outlet opening (6),

said upper inlet opening (5) lying on the horizontal surface (15), said LED (20) is placed at said at least one focus (100) of the first rotationally symmetrical solid (P),

the asymmetrical reflector (1) is rotatably mounted with said horizontal surface (15) in such said asymmetrical reflector (1) is suitable for rotating about the vertical axis (Y) passing from at least one first position for illuminating to at least one second position for illuminating, characterized in that

the first geometrical plane curve (11) is a parabola and the second geometrical plane curve (12) is an ellipse,

a plurality of light rays (21-25) emitted by the LED (20) placed at the focus (100, 201), are incident on an inner surface (4) of the asymmetrical reflector (1),

first light rays (21-22) are incident on an inner surface (41) of the rear portion (2) of the asymmetrical reflector (1) and are deflected in order to be parallel to each other and parallel to the axis of direction (V),

second light rays (23-25) are incident on an inner surface (42) of the front portion (3) of the asymmetrical reflector (1) and are deflected in order to pass by a second focus (202) of said at least two foci (201, 202) of the second rotationally symmetrical solid (E),

said first angle (a) on the first geometrical plane (14) being comprised in range from 0° to 80° sexagesimal,

said second angle (β) on the first geometrical plane (14) being comprised in range from 0° to 80° sexagesimal,

said light rays (21-25) maintaining a maximum intensity of a light beam of the LED (20) in direction towards the axis of direction (V).

5. Asymmetrical reflector (1) for LED (20) suitable for angularly deflecting light rays (21-25) emitted by said LED (20), said asymmetrical reflector (1) constructed according to any one of the claims 1-3, wherein the asymmetrical reflector (1) comprises an upper inlet opening (5) and a lower outlet opening (6),

the first geometrical plane curve (11) is a first ellipse and the second geometrical plane curve (12) is a second ellipse,

a plurality of light rays (21-25) emitted by the LED (20) placed at the focus (100, 201), are incident on an inner surface (4) of the asymmetrical reflector (1), first light rays (21-22) are incident on an inner surface (41) of the rear portion (2) of the asymmetrical reflector (1) and are deflected in order to pass by a second focus of said at least one focus (100) of the first rotationally symmetrical solid (P),

said light rays (21-25) decrease in intensity a light beam scattering the light rays (21-25) in directions comprised in range from 0° to 90° with respect to the direction of the axis of direction (V).

6. Projector (10) comprising a plurality of LEDs (20) mounted with a horizontal surface (15), wherein in correspondence with each LED (20) of said plurality of LEDs (20) is mounted an asymmetrical reflector (1), each asymmetrical reflector (1) of a plurality of asymmetrical reflectors (1) being suitable for angularly deflecting light rays (21-25) emitted by said LED (20) of said plurality of LED (20), said asymmetrical reflector (1) being rotatably mounted with the horizontal surface (15) through upper inlet opening (5) of said asymmetrical reflector (1), said horizontal surface (15) mounting said plurality of LED (20), in such that said asymmetrical reflector (1) is suitable for rotating about a vertical axis (Y) passing from at least one first position for illuminating to at least one second position for illuminating, said vertical axis (Y) being perpendicular to the horizontal surface (15) and being in correspondence with each LED (20) of said plurality of LED (20),

said asymmetrical reflector (1) comprises at least one through opening (30) adapted for passing a fixing element between the asymmetrical reflector (1) and the horizontal surface (15) to fix at least one position for illuminating of the asymmetrical reflector (1),

said asymmetrical reflector (1) is the asymmetrical reflector (1) for LED (20) according to any one of the claims 4 or 5.