ES2399156B1 - LIGHT-BASED DIODE LIGHTING SYSTEM WITH MOBILE OPTICS FOR CONTROLLING THE OUTLIGHT BEAM. - Google Patents

Abstract

The LED lighting system with mobile optics for controlling the output light beam, comprises an LED plate and a mobile optical device with individual optics forming groups with different patterns corresponding to different light distributions that are repeated sequentially within each group. The individual LEDs occupy concentric circumferences at the center of the LEDS plate and the individual optical structures of each group occupy concentric circumferences at the center of said optical device, these positions corresponding to the positions occupied by the individual LEDs and the optical device is provided as a rotating disk around an axis E to rotate, even with the aid of driving means, between a plurality of operating positions, so that at least one of said optical structures of a group is placed above, totally or partially, on one of the individual LEDs, when the optical device rotates.

Description

Lighting system based on light emitting diodes with mobile optics for controlling the output light beam.

The present invention belongs to the field of lighting elements.

Scope and prior art

The invention relates generally to a lighting system with light emitting diodes that allows controlling the light distribution of the light emitted by the diodes, and has application in all types of lighting installations both domestic and industrial or public use.

From US 2008/0231162 A1 a lighting device is known that includes a light source intended as a strip of light emitting diodes and at least two plates in which respective transparent areas and areas formed with alternately defined respective matches of different color, said plates being provided to move relative to each other and also with respect to the light source, either linearly or rotatably, to gradually overlap transparent areas and zones with different matches of the respective plates, with which the radiation spectrum can be varied, that is to say the color, and more specifically its colorimetric properties from the light source, thus taking advantage of the principle of additive synthesis for color generation. Starting from a blue emitted light and using red and green matches, an RGB model similar to that used in color television is created that allows sintering a wide range of colors, but all without mentioning the possibility of modifying the pattern of light distribution of the beams generated by the LEDs.

By means of WO 2005/093319 A1 a lighting system is disclosed which comprises means for generating a beam of converging light on a central axis, a lens located basically around said central axis and means for moving said lens with respect to the means of light generation When a lens, for example, a flat-concave lens, travels along said central axis, the width of the light beam can be changed and when a lens, for example, a biconcave lens travels perpendicularly to the central axis, the angle of exit of the light beam. The possibility of grouping several lenses with different patterns of light distribution to alternately vary between various types of light beam distribution patterns is not contemplated here, in addition, to vary the distribution of the beam only a translation of the lens is contemplated longitudinally to the central axis of the system and only a translation of the lens perpendicular to the central axis is mentioned to change the orientation of the beam but not to produce a change in the distribution of said beam.

Additionally, through document ES 2339209 A1, in the name of the applicant, an optical system consisting of a plate of electro-luminous diodes (LEDs) arranged longitudinally and mutually equidistant and a single mobile optical part consisting of a strip is known periodically, with a period equal to the distance between LEDs, formed by sequences of lenses with different light distribution patterns. In this system, by means of a longitudinal displacement of the moving optical part with respect to the LEDs, it is selected what type of lens the light from the LED collects, and, consequently, it is possible to vary the width and distribution of the resulting light beam with the appropriate choice of the lens This system is adapted to linear type lighting and is intended as a single optical stage implemented by a single lens, but does not allow its application to focus-type circular optical systems.

Description of the invention

Starting from the state of the art described above, the invention aims to develop a system of the type indicated in a principle that allows solving the problems of the prior art.

This objective is achieved through the characteristics indicated in claim 1. Other objectives and advantages of the invention are achieved by the characteristics indicated in the dependent claims.

The system comprises a plate of LEDs with a plurality of individual light emitting diodes and an optical device with a plurality of individual optical structures forming groups with different patterns corresponding to different light distributions that are repeated sequentially within each group, being said optical device arranged to move with respect to the LED plate so that their respective light beams impact on the optical structures of each group with a certain common light distribution pattern, and according to the invention it is characterized in that:

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 The LED plate is provided as a plate with a plurality of individual light emitting diodes that are distributed occupying respective concentric circumferences to the center of said plate at positions defined by the radius of a respective circumference in the plate and its angular coordinate of a system polar originating in said center of said plate;

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 The optical device is essentially provided as a rotating disk around an axis containing the geometric center of the LED plate and the geometric center of the rotating disk, so that it can be moved by rotating between a plurality of operating positions;

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 in the optical device the individual optical structures of each group are distributed occupying respective concentric circumferences to the center of said disk in positions defined by the radius of a respective circumference in the disk and its angular coordinate of a polar system originating in said center of said disk, these positions corresponding to the positions occupied by the associated individual LEDs of the LED board, so that, at least, one of said optical structures of a group is placed above, totally or partially, on one of the LEDs individual of the LED board, when the optical device moves to control the distribution of the light beam emitted by the LED.

ES 2 399 156 A1

Advantages

The following are the main advantages of this device with a purely enunciative and non-limiting nature, namely:

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 According to an additional feature of the invention, it is an advantage when each of the individual LEDs is provided with a respective reflector / lens to control and direct its light beam in the normal direction to the LED board.

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 According to an additional feature of the invention, an advantageous configuration of the system results when the individual LEDs are distributed angularly equidistant within the LEDS board; and in the optical device the first individual optical structures of each group are also distributed angularly equidistant and with the same angular separation (Bh) within each group.

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According to a further feature of the invention, it is advantageous to mount the disk-shaped optical device on a guide support with an annular guide groove.

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In accordance with a further feature of the invention, it is especially advantageous to provide motor means adapted to move the optical device between the operating positions in which the light beam of at least one individual LED of the LED plate totally or partially affects on, at least, one of the individual optical structures of the groups of optical structures, in order to control the distribution of said beam of light according to the pattern of distribution of the optical structure or structures on which it affects.

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Also according to an additional feature of the invention, the driving means is advantageously adapted to move the optical device with respect to the LEDS plate in a progressive or continuous manner.

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According to an additional feature of the invention, an advantageous arrangement of the system can also be obtained when the driving means are adapted to move the optical device with respect to the LEDS plate discontinuously or step by step.

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Also according to an additional feature of the invention is an advantageous configuration of the system when the optical structures are chosen from a group that includes concave lenses, convex lenses that provide intensive or extensive distributions, cylindrical or prismatic surfaces, which can offer distributions without symmetry. of revolution such as elliptical light patterns, conical lenses, which have annular patterns, or Fresnel lenses that produce a specific pattern.

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Even in accordance with an additional feature of the invention, an advantageous configuration of the system results when the optical structures are provided as matrix clusters of concave, convex, cylindrical, prismatic, conical or pyramidal microlenses.

Brief description of the drawings

Other features and advantages of the invention will result more clearly from the description that follows with the help of the attached drawings, referring to an example of non-limiting execution and in which

Figure 1 schematically shows a partially sectioned view of a lighting system according to the invention.

Figure 2 shows the system of Figure 1 partially divided into an operating position that produces an intensive distribution of the light beam.

Figure 3 shows the system of Figure 1 partially divided into another operating position that produces an extensive distribution of the light beam.

Figure 4 schematically illustrates a distribution of the individual LEDS on an electronic board for the system of Figure 1.

Figure 5 also shows schematically the distribution of the individual optical structures on a mobile optical device of the system of Figure 1.

ES 2 399 156 A1

Figures 6 and 7 show respective views of the LED board and the optical device for a variant of the number of LEDs and optical structures.

Figures 8A to 8E show optical structures with various configurations for use in the system according to the invention.

Figure 9 illustrates in a simplified manner a lighting system according to the invention implemented as a focus.

Detailed description of the preferred embodiments

As shown in Figure 1, the lighting system according to the invention, generally designated by the numerical reference (1), is essentially constituted by a plate of LEDs (2) and an optical device (4) which is arranged to move rotatably with respect to said LED board.

The LED board (2) consists of a plurality of individual light emitting diodes (3), while the optical device (4) is provided with a plurality of individual optical structures (5) that form groups (6) of different structures optics corresponding to different patterns of light distribution that are repeated sequentially as will be explained in detail below.

When the optical device (4) occupies an operating position as shown in Figure 2, the light beams of each individual LED (3) affect optical structures (5) of the groups (6) that have a first distribution pattern of common light, in this case an intensive light pattern indicated in the figure with barely divergent arrows; but when the optical device (4) is rotated and becomes another operating position as shown in figure 3, the light beams of each LED affect other optical structures (5) of the groups (6) with a second pattern of common, different light distribution, in this case an extensive light pattern indicated in the figure with appreciably divergent arrows. It should be clarified here that, for simplicity of representation, Figures 2 and 3 show the device of Figure 1 fragmented in its central part, illustrating only the individual LEDs (3) and the individual optical structures (5) in the respective proximities of the edge of the LED board

(2) and the edge of the disc (4).

As shown, for example, in Figure 1, each of the individual LEDs (3) is equipped with a respective reflector / lens (7) which allows controlling and directing its light beam in the normal direction to the LED board (2). ).

With further reference to Figure 4, it can be seen that the LED plate (2) is provided as a circular plate with a plurality of individual light emitting diodes (3) that are distributed occupying respective concentric circumferences to the center Op of said plate in Rpi-Apj positions, angularly equidistant, Rpi being the radius of a respective circumference in the plate and Apj its angular coordinate in a polar system originating in said center of said plate.

With further reference to Figure 5, it can be seen that in the rotating optical device (4), the individual optical structures (5) of each group (6) are distributed occupying respective concentric circumferences to the center Od of said disk in Rdl-Adm positions. , angularly equidistant, where Rdl is the radius of a respective circumference in the disk and Adm is its angular coordinate in a polar system originating in said center of said disk, these positions corresponding to the positions occupied by the individual LEDs (3) LED board partners (2). In addition, it can be seen that the individual optical structures (5) of each group (6) are arranged with the same angular separation Bh, and said angular separation being sufficient for only one of the optical structures (5) of each group (6) ) pick up the light beam of the associated individual LED (3), when said optical device is rotated to an operating position; however, even when the separation between the optical structures (5) of each group is not represented, it can be adapted so that adjacent optical structures partially collect the light beam from a single individual LED (3).

It should be noted here that for clarity of representation in Figure 5, only some of the groups of optical structures included in the device (4) are represented; and that for the same reason in figure 4 only some of the individual LEDs (2) of the LED board (2) are represented.

As mentioned and shown in Figure 1, the optical device (4) is essentially disk-shaped and is intended to rotate around an E axis that extends between the geometric center OP of the LED plate (2) and the geometric center OD of the rotating disk (4), so that angularly separated discrete operating positions can be moved between a plurality as shown in Figures 2 and 3.

As shown in Figures 6 and 7, in a particular embodiment, the LED plate (2) may be provided with three circumferences of individual LEDs (3), the optical device being arranged with three circumferences of individual optical structures (5) , each respective group (6) consisting of only two individual optical structures corresponding to two different light distribution patterns, for example an intensive distribution pattern and an extensive distribution pattern.

ES 2 399 156 A1

It should be mentioned, however, that the number of circumferences occupied by the LEDs and the individual optical structures, as well as the number of each other, can be chosen discretionally depending on the lighting application chosen. Additionally, the number of optical structures of each group (6) can be two or more, being the light distribution patterns, an intensive pattern, another extensive pattern and still others with other light distribution patterns, being important only according to the invention that the sequence of light distribution patterns be repeated in the same order for each group (6).

Although not shown, it should still be mentioned that according to the invention the groups (6) of optical structures (5) must not necessarily be angularly equidistant, nor should the optical structures (5) of each group be distributed with the same angular separation.

Referring again to Figure 1, it can be seen that the disk-shaped optical device (4) is mounted on a guide support (8) with an annular guide groove (80). Additionally, motor means (9) adapted to move the optical device (4) may be provided either progressively / continuously or discontinuously / in steps between the operating positions in which the light beam of each individual LED (3 ) of the LED board (2), only directly affects the individual optical structures (5) of the groups (6) that have a certain pattern of common light distribution or that the associated individual LED light beam ( 3), influence two or more optical structures (5) of each group (6) adjacent.

Here it should be clarified that the driving means (9) are represented symbolically associated with the axis of rotation E of the optical support to indicate their functionality as responsible for the rotation of the optical device (4), but may be arranged in the system (1) of any other technically appropriate way.

It should be further mentioned that the individual optical structures (5) may be provided as lenses to configure the light beams, for example with intensive or extensive patterns. In particular, concave lenses of the type depicted in Figure 8A could be used, but convex lenses that provide intensive or extensive distributions, cylindrical or prismatic surfaces, not shown, which can offer distributions without revolution symmetry such as elliptical light patterns could be used. , conical lenses, which have annular patterns, or Fresnel lenses that produce a specific pattern that are not shown.

But as can be seen through Figures 8B to 8E, the optical structures (5) can be respectively provided as matrix clusters of concave, convex, cylindrical, prismatic, conical or pyramidal microlenses that provide similar optical characteristics in a reduced space.

As will be readily understood by persons versed in the art, the above described is merely illustrative of preferred embodiments of the invention so that technical modifications of all kinds are possible, whereby the invention will only be limited by the scope of The following claims.

ES 2 399 156 A1

Claims (10)

1. Lighting system based on light emitting diodes with mobile optics for control of the output light beam, said system (1) comprising a plate of LEDs (2) with a plurality of individual light emitting diodes (3) and a optical device (4) with a plurality of individual optical structures (5) forming groups (6) with different patterns corresponding to different light distributions that are repeated sequentially within each group, said optical device (4) being arranged to move with respect to the LED board (2) so that their respective light beams affect the optical structures of each group with a certain common light distribution pattern, characterized in that:

-

 The LED plate is provided as a plate with a plurality of individual light emitting diodes (3) that are distributed occupying respective concentric circumferences to the center (Op) of said plate in positions (Rpi, Apj) where Rpi is the radius of a respective circumference in the plate and Apj its angular coordinate of a polar system originating in said center of said plate;

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 The optical device (4) is essentially provided as a rotating disk around an axis (Eg) containing the geometric center (Op) of the LED plate (2) and the geometric center (Od) of the rotating disk, so that it can move by rotating between a plurality of operating positions;

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 in the optical device (4) the individual optical structures (5) of each group (6) are distributed occupying respective concentric circumferences to the center (Od) of said disk in positions (Rdl, Adm) where Rdl is the radius of a respective circumference in the disk and Adm its angular coordinate of a polar system originating in said center of said disk, these positions corresponding to the positions occupied by the individual LEDs

(3) associated with the LED plate (2), so that at least one of said optical structures of a group is placed, totally or partially, on one of the individual LEDs (3) of the license plate. LEDs (2), when the optical device moves to control the distribution of the light beam emitted by the LED.

2.

 System according to claim 1 characterized in that each of the individual LEDs (3) is provided with a respective reflector / lens (7) for controlling and directing its light beam in the normal direction to the LED board (2).

3.

 System according to claim 1 characterized in that the individual LEDs (3) are distributed angularly equidistant within the LEDS board (2); and in the optical device (4) the first individual optical structures (5) of each group (6) are also angularly equidistant and with the same angular separation (Bh) within each group (6).

Four.

 System according to claim 1 characterized in that the disk-shaped optical device (4) is mounted on a guide support (8) with an annular guide groove (80).

5.

 System according to at least one of the preceding claims, characterized in that motor means (9) adapted to move the optical device (4) between the operating positions in which the light beam of at least one Individual LED (3) of the LED board (2) totally or partially affects at least one of the individual optical structures (5) of the groups of optical structures (6) in order to control the distribution of said light beam according to the distribution pattern of the structure or optical structures (5) on the one / s that it affects.

6.

 System according to claim 5 characterized in that the driving means (9) are adapted to move the optical device (4) with respect to the LEDS plate in a progressive or continuous manner.

7.

 System according to claim 5, characterized in that the driving means (9) are adapted to move the optical device (4) with respect to the LEDS plate (2) discontinuously or step by step.

8.

 System according to the preceding claims, characterized in that the optical structures (5) are provided as concave, convex lenses that provide intensive or extensive distributions, cylindrical or prismatic surfaces, which can offer distributions without revolution symmetry such as elliptical light patterns, conical lenses, which have annular patterns, or Fresnel lenses that produce a specific pattern.

9.

 System according to claim 8, characterized in that the optical structures (5) are provided as matrix groups of concave, convex, cylindrical, prismatic, conical microlenses (50)

or pyramidal. SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 201130408 SPAIN Date of submission of the application: 03.22.2011 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: See Additional Sheet RELEVANT DOCUMENTS

Category

56 Documents cited Claims Affected

X

WO 2007007271 A2 (KONINKL PHILIPS ELECTRONICS NV et al.) 18.01.2007, 1-9

page 2, lines 5-21; page 5, line 13 - page 6, line 9; page 11, lines 5-25;

Figures 1A, 1B, 2A, 2B, 5.

X

US 2008273324 A1 (BECKER AARON JAMES et al.) 06.11.2008, 1-9

paragraphs [0014] - [0024], [0027]; Figures 1,2A, 2B, 4.

X

ES 2278955 T3 (GELCORE LLC) 16.08.2007, 1-9

page 3, lines 1-26; page 4, lines 18-55; page 5, lines 1-5,62-68; page 6, lines 15-23;

page 8, lines 1-5.

TO

WO 03044870 A1 (GEORGES MIREILLE et al.) 05.30.2003, 1-9

page 3, lines 25-35; page 4, lines 20-30; page 5, lines 25-38; Figures 3-5.

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of completion of the report 02.22.2013

Examiner V. Balmaseda Valencia Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 201130408 CLASSIFICATION OBJECT OF THE APPLICATION F21V14 / 06 (2006.01) F21V5 / 00 (2006.01) F21V7 / 00 (2006.01) Minimum documentation sought (classification system followed by classification symbols) F21V Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENES, EPODOC, WPI, NPL State of the Art Report Page 2/4  WRITTEN OPINION Application number: 201130408 Date of Completion of Written Opinion: 02.22.2013 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 6, 7 1-5, 8, 9 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1-9 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 201130408  1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

WO 2007007271 A2 (KONINKL PHILIPS ELECTRONICS NV et al.) 18.01.2007

D02

US 2008273324 A1 (BECKER AARON JAMES et al.) 06.11.2008

D03

ES 2278955 T3 (GELCORE LLC) 08/16/2007

 2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement The object of the present invention is a lighting system based on light emitting diodes with mobile optics for controlling the output light beam comprising a plurality of individual light emitting diodes and an optical device with a plurality of individual optical structures. Document D01 describes a lighting system comprising: -A plate of light-emitting diodes arranged in the foreground occupying concentric circumferences at the center of said plane and equidistant.-A plurality of associated optical structures located in the second plane in the form of rotating disk around an axis that contains the same center of the foreground. Each optical structure has the same distribution as the diodes and the same focal length. Foreground and background is in parallel position and at a distance equal to the focal length of the lenses. Likewise, said system comprises displacement means that allow translational and rotational displacement of the plurality of optical structures with respect to the diode plate. In a preferred embodiment, the individual LEDs are provided with a reflector to guide the light and the optical structures are Fresnel lenses (page 2, lines 5 21; page 5, line 13 -page 6, line 9; page 11, lines 5 - 25; Figures 1A, 1B, 2A, 2B, 5). Document D02 discloses a lighting system comprising an array of lenses capable of generating multiple light distributions. Said matrix of lenses has a circular shape and is located on a plate of light emitting diodes. The lenses have a radial distribution in equidistant positions and can be placed totally or partially on each of the LEDs. In turn, both the lens matrix and the diode plate can be provided with mechanisms that allow their rotational and translational displacement (paragraphs [0014] - [0024] and [0027]; Figures 1, 2A, 2B, 4). Document D03 describes a variable beam concentrated light beam module comprising an LED module consisting of a plurality of LEDs; an optical system comprising a plurality of lenses (fresnel lenses) in optical communication with the LED module along an optical axis between the lenses and the LEDs; and a zoom apparatus that adjusts the relative axial separation between the optical system and the LED module by means of two rings on which the lenses and LEDs respectively are arranged. The plurality of lenses is arranged in conjunction with the LEDs so that each LED is located on the optical axis of the lens and its distribution is essentially uniform. On the other hand, in a preferred embodiment in the zoom apparatus an annular projection extends from one of the rings and selectably moves into one of five recesses that can be annular grooves, holes or the like (page 3, lines 1 -26; page 4, lines 18 -55; page 5, lines 1-5, 62-68; page 6, lines 15-23; page 8, lines 1 -5). Thus, it is considered that the technical characteristics set forth in claims 1-5,8 and 9 are known from documents D01-D03. Consequently, it is considered that the object of said claims lacks novelty and inventive activity as established in Articles 6.1 and 8.1 of the L.P. The difference between the object of claims 6 and 7 and documents D01-D03 is that none of said documents discloses a diode-based lighting system in which the driving means are adapted to move the optical device well continuously. or discontinuously. However, these differences are not considered to confer any element of significance with respect to the known state of the art of the cited documents. Consequently, it is considered that the object of these claims does not imply inventive activity (Article 8.1 of the L.P.) State of the Art Report Page 4/4