KR102471646B1 - LED lighting - Google Patents

Abstract

The present invention relates to an LED lighting fixture, and more particularly, to a lighting fixture, which reduces the occurrence rate of defects due to perforation and fastening of pieces by fixing an attached LED substrate on which LED elements are disposed on an inner wall of a lighting fixture body through adhesion, and prevents deterioration of each LED element by ensuring stable heat generation between the LED substrate and lighting fixture body, while uniformly diffusing light emitted from the LED elements to suppress glare.

Description

LED lighting {LED lighting}

The present invention relates to an LED lighting fixture, and more particularly, to reduce the occurrence rate of defects due to perforation and fastening of pieces by fixing an attached LED substrate on which LED elements are disposed on the inner wall of the lighting fixture body through adhesion, and to provide an LED substrate and a lighting fixture It relates to an LED luminaire that prevents deterioration of each LED element by securing stable heat generation between main bodies, and suppresses glare by uniformly diffusing light emitted from the LED element.

As is well known, a Light Emitting Diode (hereinafter referred to as 'LED') is a device that generates and emits light by generating injected minority carriers using a p-n junction structure of a semiconductor and recombination thereof, on a substrate A light emitting source is constituted by the layered structure of the grown compound semiconductor.

These light emitting diodes are adopted as a light source for lighting in homes and offices, and are used as low-power, high-efficiency lighting fixtures.

The luminaire is configured to have an LED board on which LED elements are disposed in an installation space formed in a luminaire body, so as to increase the illuminance of an indoor space through light emitted from the LED elements.

However, the conventional LED substrate on which the LED elements are disposed is assembled to the inner wall of the lamp body through a fixing piece, causing local deformation of the LED substrate due to the fastening of the fixing piece, and deterioration in heat generation performance of the LED substrate. This led to a shortened lifespan due to deterioration of the LED element.

In particular, in order to fix the LED substrate to the inner wall of the luminaire body through the fastening bolt, since the fastening holes must be drilled and formed correspondingly to the LED substrate and the luminaire body, not only the workability is greatly reduced, but also the fastening fixing process through the fixing piece Direct deformation of the LED substrate causes damage to the circuit formed on the LED substrate, resulting in frequent defects.

In addition, the light emitted from the LED elements of the LED substrate disposed on the installation surface of the luminaire body causes glare due to its high linearity. The emitted light is diffused while passing through the diffuser plate.

However, if the distance between the LED substrate and the diffusion plate is narrowed, light emitted from the LED element disposed on the LED substrate is not properly diffused, resulting in glare. 50mm or more) to eliminate glare, but if the distance between the LED element and the diffuser plate is formed far, the light efficiency decreases and the thickness of the luminaire body that provides the installation space for the LED substrate and the diffuser plate increases. this occurs

KR 10-2018-0003956 A (2018. 01. 10) KR 10-2016-0026604 A (2016. 03. 09)

An object of the present invention, which was made to solve the above problems, is to reduce the defect rate of the LED board by preventing deformation of the LED board while securing improved workability by arranging the LED board on the installation surface of the lamp body, and LED It is to provide an LED luminaire that prevents deterioration of the LED elements disposed on the LED substrate by ensuring stable heat dissipation between the substrate and the luminaire body, while suppressing glare by uniformly diffusing light emitted from the LED elements.

The above object is achieved by the following structure provided by the present invention.

The LED luminaire according to the present invention,

A lamp body having an open lower installation space with an installation surface formed thereon; an LED board disposed on an installation surface of the lighting fixture body and having a plurality of LED elements arranged on a lower surface thereof; and a diffusion plate disposed below the installation space to diffuse light emitted from the LED elements disposed on the LED substrate,

On the LED substrate on which the LED elements are arranged, a diffusion lens is disposed to cover the LED elements individually with a diffusion structure,

The diffusion lens is characterized in that it is configured to be bonded to the LED substrate through a lens adhesive layer formed by an adhesive applied in a radial structure on the outside of the LED element in a point form.

Preferably, the diffusion lens includes a lens body made of injection molded material having a concave light-incoming surface and a convex light-emitting surface formed on an outer diameter surface to accommodate an LED element in an upper central portion;

A diffusion core is formed in the central portion of the light exit surface of the lens body to re-diffuse light transmitted to the central portion of the light exit surface of the lens body.

More preferably, a lower open type socket groove is concave upwardly at the center of the light exit surface of the lens body, and a diffusion core having a concave light exit surface is formed in the socket groove.

And, the LED substrate is configured to be disposed on the installation space installation surface by a substrate adhesive layer formed by an adhesive on the installation space installation surface formed in the luminaire body.

As described above, in the present invention, by proposing and adding a diffusion lens that multi-diffuses light emitted from an LED device, stable diffusion of light is possible through multi-diffusion of light.

In addition, in the present invention, while securing improved workability by arranging the LED substrate on the installation surface of the installation space of the lighting fixture body, the deformation of the LED substrate is prevented to reduce the defect rate of the LED substrate, and stable heat generation between the LED substrate and the lighting fixture body It has improved durability by preventing deterioration of the LED elements disposed on the LED substrate by ensuring the durability.

1 shows the overall configuration of an LED lighting fixture proposed as a preferred embodiment in the present invention,
Figure 2 shows the overall assembly state of the LED lighting fixture proposed as a preferred embodiment in the present invention,
Figure 3 shows the detailed configuration of the diffusion lens in the LED lighting fixture proposed as a preferred embodiment in the present invention,
4 and 5 are detailed action state diagrams schematically showing the detailed assembly state and heat dissipation and diffusion action of the 'A' portion of FIG. 2,
6 shows a detailed configuration of a diffusion lens proposed in another form in an LED lamp proposed as a preferred embodiment of the present invention.

Hereinafter, an LED lamp proposed as a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows the overall configuration of the LED lighting fixture proposed as a preferred embodiment in the present invention, Figure 2 shows the overall assembly state of the LED lighting fixture proposed as a preferred embodiment in the present invention, Figure 3 is the present invention In the LED lighting fixture proposed as a preferred embodiment in, the detailed configuration of the diffusion lens is shown, and FIGS. 4 and 5 schematically show the detailed assembly state of the 'A' portion of FIG. 2 and the heat dissipation and diffusion action. It is a detailed working state diagram, and FIG. 6 shows a detailed configuration of a diffusion lens proposed in another form in an LED lamp proposed as a preferred embodiment of the present invention.

The LED lighting fixture 1 proposed as a preferred embodiment in the present invention is a lighting fixture that is fixed to the ceiling of a home or office to secure the illumination of the corresponding indoor space.

As shown in FIGS. 1 and 2, the LED lighting fixture 1 includes a lighting fixture body 10 having a lower open installation space 12 with an installation surface formed thereon; an LED substrate 20 disposed on an installation surface of the installation space 12 of the lamp body 10 and having a plurality of LED elements 21 arranged on a bottom surface; and a diffusion plate 30 disposed below the installation space 12 to diffuse light emitted from the LED elements 21 .

Therefore, the light emitted from the LED elements 21 disposed on the LED substrate 20 is emitted to the indoor space through the lower surface of the installation space 11, and at this time, each LED element 21 emits light from the installation space ( 11) The light emitted to the lower surface is diffused through the diffuser plate 30 to suppress glare caused by the LED element 21 lit with high brightness.

By the way, if the diffusion plate 30 is disposed close to the LED substrate 20 on which the LED elements 21 are disposed, light transmittance is increased and high light efficiency can be secured. Each LED element 20 is projected to generate glare.

Conversely, if the LED substrate 20 and the diffusion plate 30 are spaced apart at intervals of 50 mm or more, glare can be minimized. If it is farther away, not only the light efficiency is lowered, but also the thickness of the lamp body 10 providing the installation space for the LED substrate 20 and the diffusion plate 30 increases.

In order to solve this problem, in the present embodiment, a diffusion lens 100 covering the entire light emitting surface of the LED elements 21 with a diffusion structure is disposed on the LED substrate 20 on which the LED elements 21 are disposed. The light emitted from each LED element 21 is firstly diffused while passing through the diffusion lens 100 and then is secondarily diffused through the diffusion plate 30. By shortening the interval (less than 50 mm), it is possible to manufacture a slimmer LED lighting fixture (1).

According to this embodiment, as shown in FIGS. 2 to 5 , the diffusion lens 100 is formed on the outside of the LED element 21 by a lens adhesive layer 15 formed through a dotted adhesive applied in a radial structure to the LED substrate. (20) is attached and placed.

In this embodiment, a multi-diffusion structure is formed on the diffusion lens 100 so that the light emitted from the LED device 21 is multi-diffused by the multi-diffusion structure to prevent glare more stably.

As shown in FIGS. 3 to 5, the diffusion lens 100 having a multi-diffusion structure proposed in this embodiment accommodates the LED element 21 in the upper center portion and has a concave light incident surface 111 formed. , a lens body 110 made of injection molded material having a convex light exit surface 112 formed on the outer diameter surface; A diffusion core 120 is disposed in the center of the light exit surface 112 of the lens body 110 and re-diffuses the light transmitted to the center of the light exit surface 112 of the lens body 110 .

According to the present embodiment, a bottom open socket groove 113 is concave upward at the center of the light exit surface 112 of the lens body 110, and the diffusion core 120 has at least the light exit surface 121 concave. Made of a molded material, it is formed in the socket groove 113.

At this time, the lens body 110 and the diffusion core 120 forming the multi-diffusion structure may be separated and molded through injection molding, and then formed into a single body through an ultrasonic welding process or an adhesion process.

However, in this embodiment, the injection-molded lens body 110 is multi-injected to form a diffusion core 120 having a concave light exit surface 121 in a central portion of the light exit surface 112 of the lens body 110. One is scheduled as a more preferred embodiment.

In a more preferred embodiment, as shown in FIG. 6, a ball joint type press-fit socket 114 is formed at the center of the light exit surface 112 of the lens body 110, and a ball joint is formed on the upper surface of the diffusion core 120. By forming protrusions 122, the diffusion core 120 is press-fitted into the central portion of the light exit surface 112 of the lens body 110 in a ball joint structure and assembled.

In this way, when the diffusion core 120 is press-fitted into the light exit surface 112 of the lens body 110 in a ball joint structure, the diffusion core 120 can be tilted around the ball joint protrusion 112, which Through this, it is possible for the constructor or the user to arbitrarily set the diffusion angle of the light emitted from the LED element 21 by tilting the diffusion core 120 in consideration of the field situation.

In addition, the lens body 110 and the diffusion core 120 constituting the diffusion lens 100 are made of optical synthetic resin, and the lens body 110 and the diffusion core 120 are made of a release material having different light transmittance and diffusion rate. consists of

In the present invention, for example, the lens body 110 is made of polycarbonate resin having excellent light transmittance, and the diffusion core 120 multi-injected into the lens body 110 is an acrylic resin having excellent diffusion rate ( It is made of poly methyl acrylate), so that the transmittance and diffusion rate between materials are different.

At this time, the central portion of the light-incoming surface 111 of the lens body 110 and the light-emitting surface 112 of the lens body 110 where the socket groove 113 is formed is composed of a non-light layer, and the lens body 110 The edge of the light exit surface 112 is composed of a glossy layer, so that sufficient light transmittance is secured through the light layer, while excessive light transmits through the central portion of the light exit surface 112 of the lens body 110 made of a matte layer, resulting in glare. suppress the phenomenon.

In addition, the light exit surface 121 of the diffusion core 120 formed at the center of the light exit surface 112 of the lens body 110 is composed of a matte layer, and the center of the light exit surface 112 of the lens body 110 is formed. The light emitted through the light diffuses to the edge while passing through the conical diffusion core 120 having the concave light exit surface 121, thereby suppressing the concentration of illumination in the center of the diffusion lens 120 and minimizing the occurrence of glare.

In the present specification, the glossy layer refers to having a transparent surface with a smooth surface like a general lens to refract light according to Snell's law, and the matte layer has characteristics in which light is diffused and scattered as the surface is roughened through corrosion or sanding. refers to having

In this way, when a diffusion lens having a multi-diffusion structure is disposed on the LED substrate 20 so that the light emitted from the LED element 21 disposed on the LED substrate 20 is diffused, the illumination intensity is reduced to the central portion of the diffusion lens 100. A phenomenon that causes glare is suppressed, and as a result, it is possible to manufacture a slimmer LED lamp by shortening the distance between the LED substrate 20 and the diffusion plate 30.

Meanwhile, the LED substrate 20 is bonded to the installation surface of the lamp body 10 through an adhesive applied to the installation surface of the lamp body 10, and adhered to the installation surface of the lamp body 10 through a substrate adhesive layer 14 to be fixed.

In this way, when the LED substrate 20 is fixed to the installation surface of the lamp body 10 through adhesion, various aspects of assembling the LED substrate to the installation surface of the lamp body through a fixing piece are formed by drilling holes in the conventional LED substrate. problems can be solved.

Further, in the present invention, one or more assembly slots 12 cut vertically and through are formed on the installation surface of the lamp body 10, and a heat dissipation sheet 13 made of a heat dissipation piece is inserted into each assembly slot 12. A substrate adhesive layer 14 formed by gluing an LED substrate 20 on the installation surface made of the heat dissipation sheet 13 are connected through

At this time, the heat dissipation sheet 13 is composed of a metal piece made of a copper material so that the heat emitted from the LED substrate 20 bonded to the bottom surface is radiated to the outside.

Preferably, the outer wall of the heat dissipation sheet 13 is formed with a shoulder groove 13a press-fitted to the inner wall of the assembly slot 12, and the heat dissipation sheet 13 disposed penetrating the assembly slot 12 is fixed by press fit to the inner wall of the assembly slot 12 through the shoulder groove 13a.

Therefore, the heat dissipation sheet 13 is disposed to pass through the assembly slot 12 formed by penetrating the lamp body 10 without a separate fastening process to form an installation surface exposed to the outside on the outer wall surface, and the substrate adhesive layer 14 ) through which the LED substrate 20 is fixed to the installation surface through adhesion.

In this way, an installation surface communicating with the outside is formed on the top of the lamp body 10 through the heat dissipation sheet 13 made of the heat dissipation piece, and the LED substrate 20 is bonded to the installation surface made of the heat dissipation sheet 13. When disposed, a stable contact state is formed between the heat radiation sheet 13 forming the installation surface and the LED substrate 20, and deterioration of the LED elements 21 due to heat emitted from the LED substrate 20 is suppressed.

In particular, the LED substrate 20 disposed in the installation space 11 through the heat dissipation sheets 13 locally disposed on the upper part of the installation space 11 even without configuring the lamp body 10 with a heat dissipation material. Since it is possible to promote stable heat dissipation, it has a uniqueness capable of manufacturing an LED lamp having an excellent heat dissipation rate at a low cost.

As described above, the present invention has been shown and described in relation to specific embodiments, but those skilled in the art can make various modifications and changes without departing from the spirit and scope of the invention indicated by the claims. Anyone who grows up will easily understand.

1. LED luminaires
10. Luminaire body 11. Installation space
12. Assembly slot 13. Heat radiation sheet
13a. 14. Substrate adhesive layer
15. Lens adhesive layer
20. LED board 21. LED element
30. Diffuser plate
100. Diffusion lens 110. Lens body
111. Light entrance surface 112. Light exit surface
113. Socket groove 114. Ball joint type press-fit socket
120. Diffusion core 121. Concave light exit surface
122. Ball joint projection

Claims (3)

A lamp body having an open lower installation space with an installation surface formed thereon; an LED substrate disposed on an installation surface of the lighting fixture body and having a plurality of LED elements arranged on a lower surface thereof; and a diffusion plate disposed below the installation space to diffuse light emitted from the LED elements disposed on the LED substrate,
On the LED substrate on which the LED elements are arranged, a diffusion lens is disposed to cover the LED elements individually with a diffusion structure,
The diffusion lens is configured to be adhered to and disposed on the LED substrate through a lens adhesive layer formed by an adhesive applied in a radial structure on the outside of the LED element,
The diffusion lens includes a lens body made of an injection molded material which accommodates an LED element in an upper central portion, has a concave light-incoming surface, and has a convex light-emitting surface formed on an outer diameter surface;
A diffusion core formed in the center of the light exit surface of the lens body to re-diffuse light transmitted to the center of the light exit surface of the lens body,
Multi-injection of the injection-molded lens body forms a diffusion core having a concave light exit surface in a laminated manner at the center of the light exit surface of the lens body,
A socket groove of a lower open type is concave upwardly at the center of the light exit surface of the lens body, and a diffusion core having a concave light exit surface is formed in the socket groove.
A ball joint type press-fitting socket is formed at the center of the light exit surface of the lens body, and a ball joint protrusion is formed on the upper surface of the diffusion core, so that the diffusion core is press-fitted to the center of the light exit surface of the lens body in a ball joint structure to assemble. In this way, the diffusion core is tilted around the ball joint protrusion to arbitrarily set a diffusion angle of light emitted from the LED device. delete The LED lighting fixture according to claim 1, wherein the LED substrate is configured to be disposed on the installation space installation surface by a substrate adhesive layer formed by an adhesive on the installation space installation surface formed in the luminaire body.

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