WO2011135151A1

WO2011135151A1 - Led light bulb

Info

Publication number: WO2011135151A1
Application number: PCT/ES2011/070307
Authority: WO
Inventors: Luís BERNAL BARRIOS; Rubén VILLA CHAPARRO
Original assignee: Investigacion Y Desarrollo De Led, S.L.
Priority date: 2010-04-29
Filing date: 2011-04-29
Publication date: 2011-11-03
Also published as: ES2378800A1; WO2011135151A4; ES2378800B1

Abstract

The invention relates to an LED light bulb formed by: a connection and attachment base (1); a body (2) that supports the connection and attachment base (1); one or more adjacent biconical bodies (3), of which at least one of the two side bodies includes a plurality of LEDs (37) disposed in an area close to the periphery thereof; optionally a closure body on one of the sides of the assembly formed by the biconical bodies (3); and a cover (4) provided with holes (41).

Description

LED bulb

The present invention has as its object a bulb constituted by a plurality of LEDs, which are arranged perimetrically, and is provided with reflector elements, as well as with cooling elements thereof, as well as a protection, dispersion cover and, where appropriate , focus of the light.

Over time the lighting technology has been developed that began with the first metallic filaments that, with the passage of electricity, reach the incandescent temperature and are arranged inside vacuum bulbs. Subsequently, gas tubes have been developed that are excited by the contribution of electrical energy and that by ionization excited by a pair of electrodes arranged at the ends of said tubes produce their ionization and emission of light at a lower temperature than in metal resistors . Because for the same performance Light / energy provided the gas tubes have given greater performance than incandescent light, these tubes have been adapted to conventional screw caps, in what we now know as energy saving lamps.

For greater performance and high light powers, especially used in public lighting, mercury vapor or sodium vapor lamps have been used, in which a corresponding amount of the corresponding bulb is provided in an internal bulb of a vacuum bulb steam, which thanks to an electrical excitation, as in the case of gas tubes (fluorescent tubes, for example) enters into a state of ionization and emission of light. These lamps have a conventional thread.

Recently, LED lighting has been developed in which an NP diode is electrically excited to produce light, and because it is not allows a significant current flow, the energy consumption is significantly lower than in the case of conventional lighting devices. Conventional lighting, and in particular the street lamp luminaires in public lighting, is provided with bushes with a metallic thread that constitutes one of the phases of the current, while its corresponding base, electrically isolated from the bushing, constitutes the other phase.

The costs of the luminaires in street lighting lamps have a significantly high cost, so despite the fact that there is a cost savings for consumption, it is undesirable to change an entire luminaire, thus avoiding significant disbursements for the entity that should cover them.

LED lighting can mean a significant reduction in energy consumption, in the order of 80% compared to the usual systems of sodium vapor or mercury vapor. Therefore, it is desirable that in addition to being able to use lighting in public lighting by means of LEDs, there is no need to replace the entire luminaire.

One of the problems that is solved with the present invention is that of the angle of diffusion of the light, which according to this invention is close to the spherical.

Description of the invention

The present invention relates to an omnidirectional LED bulb that is formed by the following elements:

· A connection and fixing bushing; normally it will be a male screw cap or an equivalent electrical connection or connection ;; • A support body for the connection and fixing bushing, normally for insertion into a standard female bushing, as well as for supporting the lighting elements; Preferably a plurality of heat dissipation striations produced in the bulb disposed externally to the support body of the connection and fixing sleeve;

Normally one or more biconic bodies.

A transparent or translucent cover, fastened, for example by threading, glued or screwed, to the support body of the thread; said cover also comprises a plurality of windows practiced in order to facilitate the evacuation of the heat produced by the LEDs, when connected; The cover can comprise a perimeter lens wrapping each of the biconic bodies, so that it makes a controlled concentration of the light rays.

According to a first embodiment, which can be seen in Figures 1, 3 and 5 which will be described later, each of the biconic bodies is formed by:

o A pair of cones (strictly truncated cones), with their vertices facing each other;

o A cylindrical body that joins the vertices of the cones;

o A pair of discoidal bodies arranged perimetrically at the bases of the cones; each of the discoidal bodies is provided with a plurality of housings in which the LEDs are housed;

Biconic bodies exert the function of reflective surface of the light emitted by the LEDs; since the surface of said surface is curved, it disperses the light rays avoiding concentration, and providing a more pleasant illumination than in the case of concentrated light; according to this configuration, each biconic body has the desired reflector effect and does not need additional elements; However, to achieve a frontal light projection, you need an additional projector element, such as a bulb termination body, for example a flat or curved outer surface disk, provided with a plurality of housings for LEDs, or once mounted provided with said LEDs;

According to a second embodiment, represented in Figures 7 to 11 and 13 to 14, the biconic bodies are mounted in an inverse manner, that is, each of the biconic bodies is formed by:

o A pair of cones with their bases facing each other; according to a material embodiment, the area closest to the bases has a portion that forms a shoulder or discoidal body; we will call them tapered biconic bodies;

o A heat dissipation body disposed in the inner hollow and between the bases of the pair of cones, and which also exercises the function of holding the LED-carrying circuits; o A pair of discoidal bodies arranged on each of the faces of the heat dissipation body;

or perimeter in the bases of the cones; each of the discoidal bodies is provided with a plurality of housings in which the LEDs are housed; Unlike the previous embodiment, this configuration requires an additional cone or bicone for a correct radial reflection of the light, but the frontal projection is provided by the last portion (the furthest from the screw cap); the support body of the bulb screw socket requires in this case to be provided with a conical body (in fact a biconic half body) provided with its corresponding LEDs forming a base socket; thus, by adding one or more biconic bodies to said base bushing, a configuration similar to that of the first embodiment is obtained, unlike the initial and final portions (closer and further away respectively from the screw bushing).

The bulb is thus constituted of a standard connection and fixing socket that allows its insertion in fixed connectors to an installation bright, just like a lamppost. The bulb can thus adopt different configurations:

• A first configuration consists in the union of a biconical body to the support body of the connection and fixing bushing and of the lighting elements, and at the outer end of the latter there is a termination body, all covered with the corresponding cover;

• According to a second configuration, the bulb consists of the serial connection of two or more biconic bodies, attached by one of the bases of each of the bicones, and the free base of one of the end bicons of the series being connected to the support body of the connection and fixing socket, and the other free base corresponding to the other end of the series, to a bulb termination body.

• According to the third configuration, derived from the first or second, the bulb will not comprise the termination body of the bulb;

• A fourth configuration will consist of directly attaching the termination body of the bulb to the support body of the connection and fixing socket; in this case the lighting will be directional, depending on the geometry and distribution of the LEDs in said termination body.

According to the second embodiment, the configurations can be the following:

• A fifth configuration consists in attaching a biconical half body to the support body, forming a base bushing, which can be used directly;

• According to a sixth configuration, one or more biconic bodies (attached to the bases of the respective cone trunks) are attached to the base bushing of the fifth configuration.

Thus, in all cases, the light of each LED projected on the trunk surface facing it is in turn projected outward at a certain angle and with a certain degree of diffusion, so a series of few LEDs (a from three) arranged with angular separations regular or irregular in a section of the bulb, it will be enough to provide a radial illumination at an angle of 360 ° for the set of LEDs of a section, and axially at an angle close to 180 ° for each LED.

Any of the described configurations may be covered with the corresponding translucent or transparent cover or screen, and may include reflector elements and / or ventilation windows. Brief description of the drawings

In order to illustrate the explanation to be followed, we attach to the present specification nine sheets of drawings, in which fourteen figures represent the essence of the present invention, and in which:

Figure 1 shows a schematic view in longitudinal section of the body of an embodiment of the LED bulb of the invention, according to a first embodiment;

Figure 2 shows a perspective view of a support body of the connection and fixing bushing, susceptible to insertion into a standard female bushing, said body also being a support body of the lighting elements;

Figure 3 shows a schematic perspective view of a biconic body, according to a first embodiment, provided with a discoidal ring at the edges of each of the bases of the bicone, provided with LEDs in opposite positions;

Figure 4 shows a schematic perspective view of a termination body, provided with a plurality of housings in which the LEDs are located, but in which said LEDs have not yet been placed;

Figure 5 shows a sectional view of the biconic body of Figure 3, without the LEDs arranged therein; Y Figure 6 shows a schematic sectional view of a protective cover and possibly diffusion of the light generated, provided with a plurality of cooling windows.

Figure 7 shows a schematic perspective view of a tapered biconical body for the composition of the LED bulb of the invention, made in accordance with a second embodiment;

Figure 8 shows a schematic perspective view in explosion of the LED bulb according to the second embodiment;

Figure 9 shows a schematic sectional view of a base socket of the LED bulb of the invention according to the second embodiment; Figure 10 shows a schematic perspective view in explosion of one of the tapered biconic bodies that make up the LED bulb of the invention according to the second embodiment;

Figure 11 shows a schematic exploded view of the base socket of the LED bulb of Figure 9;

Figure 12 shows a schematic perspective view of an exemplary embodiment of a heat dissipation element of the LED bulb, arranged according to the second embodiment in the base sleeve or between each tapered biconic body;

Figure 13 shows a schematic sectional view of a set of two tapered biconic bodies joined together, according to the second embodiment; and Figure 14 shows a schematic sectional view of the LED bulb of the invention, according to the second embodiment; Description of the embodiments of the invention

Therefore, a LED bulb is described, which, according to a first embodiment, is formed by the following elements:

• A connection and fixing bushing (1); the connection and fixing bushing (1) is a standard screw bushing, usually an E27 or E40 type thread, although an E14 bushing, or even a bayonet type, could also be used in the same way; the connection and fixing bushing (1) is susceptible to insertion into a standard female bushing;

· A support body (2) of the connection and fixing bushing (1); the connection and fixing bushing is integral with the support body (2), being used as a single piece from its connection; the support body (2) holds and constitutes the support of the lighting elements, as well as the rest of the bulb elements; preferably, it is provided externally with a set of striations or fins (24) for dissipating the heat produced in the bulb; Y

• One or more biconic bodies (3); the biconic bodies (3) consist of a pair of cone trunks (31) with their smaller bases joined together, or possibly joined by means of a cylindrical portion (32), which separates them; preferably, both the cone trunks (31) and the cylindrical portion are hollow, so that it constitutes the passage for interior connection cables and facilitates the evacuation of heat; in case there are several of the biconic bodies (3), these will be joined together by their major bases, for example by screws, and always a larger base of a biconic body will be attached to the support body (2), possibly also by screws, while another of the major bases will always be free; at least one, and normally the two cones of each of the biconic bodies comprises a plurality of LEDs (37) arranged in an area near its periphery; As a preferred embodiment, the LED bulb of the invention will comprise in the major base of each of the cone trunks (31) that make up the biconic bodies (3) and perimeter to said major base, a discoidal annular portion (33) (a flat ring) disposed on the edge of said major base, each of said discoidal annular portions (33) provided with a plurality of holes or housings (34) in which the LEDs (37) are located; preferably, the discoidal body of each of the biconic bodies comprises a perimeter wall (39) that defines a hollow or inner housing (38) in which an electronic circuit (6) with connections for the corresponding LEDs (37) is provided.

Thus, in each of the biconical bodies (3) each cone trunk (31) exerts the function of reflecting element of the light emitted by the LEDs arranged in the other of the cone trunks (31). This reflection is also carried out in the cylindrical portion (32) of union of the cone trunks (31) with each other, and in the free surface existing in the discoidal annular portions, thus achieving a 360 ° diffusion in the plane perpendicular to the axis of the bulb.

According to the embodiment shown, the support body (2) of the connection and fixing bushing (1) has two distinct portions; a first portion (21) is essentially cylindrical (although slightly conical) and a second portion (22) essentially truncated conical; the minor base of the cone trunk (31) of the second portion (22) is attached to the first portion (21); the first portion (21) is in turn attached to the connection and fixing bushing (1). The second portion (22) also has a threaded recess (23) next to its major base.

In each bulb, the free end of the biconic bodies (3) which is not attached to another biconic leather (3) or to the support body (2)) further preferably comprises a closing body (5) of the biconic body (3); it normally consists of a disk (51) provided with a plurality of housings (54) for LEDs, and having a perimeter wall (59) in which an electronic circuit (6) with the connections of said LEDs are arranged; the disk that constitutes the closing body (5) it can be essentially flat, or form a convex curve according to a view from the outside. With said closing body (5) provided with LEDs, a solid illumination angle close to 300 ° or even more is achieved, only the area of the bulb connection socket being devoid of illumination.

The set of elements of the bulb, with the exception of the support body (2), preferably comprises a transparent or translucent cover (4), wrapping the biconic bodies (3), and the closing body (5), in its case; the cover (4) is preferably provided with a plurality of ventilation windows (41); furthermore, according to a preferred option, said cover comprises a threaded portion (42) in accordance with the threaded recess (23) formed in the support body (2), in which it can be screwed.

According to a second embodiment, the LED bulb is formed from the following elements:

• A base bushing, consisting of:

o The support body (2) together with the connection and fixing bushing (1); This base body conforms to an inner hollow (25)

or a first semi-bicone (77) attached by its major base to said support body (2); the first semi-bicone comprises at its free end a thread (71) provided with a recess (75);

o An electronic circuit (6) carrying the LEDs;

o A dissipating body (8); according to this embodiment, the dissipating body (8)), in addition to evacuating the heat produced, exerts the support function of the electronic circuit (6) carrying the LEDs; Y

o At least one connector for connecting additional lighting modules. Depending on the basic configuration, the base bushing as described is susceptible to direct use, but with the limitation that the light will be emitted only in the axial direction;

The first semi-bicone (77) is fixed to the support body by means of screws or rivets (68); which pass through holes (67, 65, 66), respectively, made in the first semi-bicone (77), in the electronic circuit (6) and in the dissipating body (8);

• One or more tapered biconic bodies (7); the tapered biconic bodies (7) consist of a pair of semi-bicons (77, 78) with their major bases joined together; Each of the tapered biconic bodies is formed in turn by:

o A first semi-bicone (77) (strictly it is a cone trunk); the minor base of the first semi-bicone (77) is provided with a hollow, hollow thread (71) through which the connecting elements of the tapered biconic bodies pass together or to the base bushing;

o A second semi-bicone (78) (strictly also a cone trunk); the first semi-bicone is linked to the second semi-bicone by its major base; the semi-bicons are assembled together and can be fixed by screws or rivets (68), so that they constitute an inseparable unit; the second semi-bicone (78) also comprises a thread (72) complementary to the thread (71) of the first semi-bicone;

o An electronic circuit (6) LED carrier (37); and o A dissipating body (8); the dissipating body is formed by a disk from which a plurality of dissipation fins (81) emerge; The center of the disk that forms the dissipating body (8) forms a hole (82).

Each of the semi-bicones (77, 78) comprises a discoidal annular portion (33) on the major base; said discoidal annular portion (33) comprises a perimeter wall (39); preferably the perimeter wall (39) of one of the semi-bicones (77,78) externally envelops the corresponding perimeter wall (39) of the other of the semi-bicones (78.77); the first semi-bicone (77 is fixed to the second semi-bicone (78) by means of screws or rivets (68); which pass through holes (67, 65, 66) respectively made in the semi-bicons (77, 78), in electronic circuits (6), in the dissipator body (8).

It is envisaged that ventilation windows (73) are arranged in the cone trunks (31) that make up the semi-bicycles (77, 78). Also, each of the semi-bicycles (77, 78) comprises, normally in the flat portion of the annular disk portion (33), holes (34) through which the LEDs (37) emerge.

The protective cover (4), in this case comprises a concavity (43) at its end, which serves as a housing for a nut (44).

In summary, the bulb is configured as a support body (2), provided with a connection and fixing socket, to which one or more semi-bicones (77, 78) or cone trunks (31) are added; in case of being more than one, the semi-biconos (77, 78) or the trunks of cone (31) are united to each other in their major bases and / or in their minor bases; the semi-bicones (77, 78) or cone trunks (31) can be grouped in modules of two, inseparably linked. The outer conical surface of the cone trunks (31) or the semi-bicycles (77, 78) constitutes a light reflective element.

Claims

1. - LED bulb, characterized by being formed by the following elements:

«A connection and fixing bushing (1);

• A support body (2) of the connection and fixing bushing (1), said support body (2) also being the support of the lighting elements;

• One or more bodies constituting a cone trunk (31) or a hollow semi-bicone (77, 78), the outer face of the cone trunk (31) or the semi-bicone (77, 78) comprising a plurality of LEDs (37) arranged in an area near its periphery;

at least one cone trunk (31) or a semi-bicone (77) attached to the support body (2).

2. - LED bulb according to claim 1, characterized in that the outer conical surface of the cone trunks (31) or semi-bicones (77, 78) constitutes a reflective element.

3. LED bulb, according to any of claims 1 to 3, characterized in that it also comprises one or more tapered biconic bodies (7), formed by a pair of semi-bicons (77, 78) joined together by their major bases .

4. LED bulb according to claim 3, characterized in that each of the tapered biconic bodies (7) comprises between the pair of semi-bicons (77, 78):

• A dissipating body (8);

• An electronic circuit (6) disposed between each of the semi-bicycles (77, 78) and the corresponding side of said dissipating body.

5. - LED bulb according to claim 1, characterized in that between the support body (2) and the cone trunk (31) or semi-bicone (77), are located:

• A dissipating body (8);

An electronic circuit (6) disposed between each of the semi-bicycles (77, 78) and the corresponding side of said dissipating body.

6. - LED bulb according to claim 4 or according to claim 5, characterized in that the dissipating body (8) consists of a disc with a central recess (82) provided with a set of fins (81).

7. - LED bulb according to claim 1, characterized in that the biconic bodies (3) consist of a pair of cone trunks (31) joined together by their smaller bases.

8. - LED bulb, according to claim 7, characterized in that the biconic bodies (3) are connected at their vertices to a hollow cylindrical portion (32) of separation between both cone trunks (31).

9. - LED bulb, according to any of claims 7 to 8, characterized in that each pair of biconic bodies (3) is fastened together by means of screws, and because one of the biconic bodies (3) is in turn attached by means of screws to the support body (2) of the connection and fixing bushing (1).

10. - LED bulb, according to any of claims 7 to 9, characterized in that each of the cone trunks (31) that make up the biconic bodies (3) comprises at its major base a disk-shaped annular body (33) arranged perimetrically , each of said discoidal annular bodies (33) being provided with a plurality of housings (34) in which the LEDs (37) are located.

11. - LED bulb according to claim 10, characterized in that the discoidal body of each of the biconic bodies comprises a perimeter wall (39) that defines a hollow or inner housing (38) in which an electronic circuit is provided with connections for the corresponding LEDs (37).

12. - LED bulb, according to any of claims 7 to 11, characterized in that it further comprises a closing body (5) of the biconic body (3) located at the opposite end to the support body (2) of the connection socket and fixing (1).

13. - LED bulb according to claim 12, characterized in that the closing body (5) of the biconic body (3) located at the opposite end to the support body (2) of the connection and fixing socket (1) consists of a disk (51) which is provided with a plurality of housings (54) for LEDs, and has a perimeter wall (59) in which the connections of said LEDs are arranged.

14. - LED bulb, according to any of claims 7 to 13, characterized in that the disk constituting the closing body (5) of the biconic body (3) is essentially flat.

15. - LED bulb, according to any of claims 7 to 13, characterized in that the disk constituting the closing body (5) of the biconic body (3) forms a convex curve according to a view from the outside.

16. - LED bulb according to any of claims 1 to 15, characterized in that the support body (2) of the connection and fixing socket (1) has two portions, a first portion (21) essentially cylindrical and a second portion (22) essentially truncated cone, the smaller base of the cone attached to the first portion (21), and the first portion (21) in turn attached to the connection and fixing bushing (1).

17. - LED bulb according to claim 16, characterized in that the second essentially conical trunk portion (22) of the support body (2) of the connection and fixing sleeve (1) also has a threaded recess (23) next to its larger base .

18. - LED bulb, according to any of claims 16 to 17, characterized in that the support body (2) of the connection and fixing socket (1), is provided externally with a set of striations or dissipation fins (24) of the heat produced in the bulb.

19. - LED bulb, according to any one of the preceding claims, characterized in that it also comprises a transparent or translucent cover (4), for wrapping the biconic bodies (3).

20. - LED bulb according to claim 19, characterized in that the transparent or translucent cover (4) is provided with a plurality of ventilation windows (41).

21. LED bulb, any of claims 19 to 20 as long as they depend on claim 8, characterized in that the transparent or translucent shell cover (4) of the biconic bodies (3) comprises a matching threaded portion (42) with the threaded recess (23) formed in the support body (2).