KR101371117B1 - Led lighting apparatus - Google Patents

Abstract

The present invention relates to a plurality of LED lamps each coupled to each upper portion of the plurality of circuit boards, and has a hemispherical shape or a heart shape cross-section with a tube shape in the longitudinal direction and an open lower part, and has a hemispherical shape or a heart shape. Both lower ends have an inner housing positioned on each upper portion of the plurality of circuit boards in a shape of being bent in an outer direction while being spaced apart to accommodate a plurality of LED lamps, and a cylindrical tube in a longitudinal direction, having a circular cross section, and having a lower inner portion. An outer housing provided with diffusion protrusions for sealing the inside and the outside and diffusing light on the inner circumferential surface while fixing the plurality of circuit boards and the inner housing, and on one side or both sides of the outer housing to supply power to the plurality of circuit boards, respectively. The inner housing and the outer housing are made of a diffusion resin material or Is characterized by having a diffusion glass material.

Description

LED LIGHTING APPARATUS [0001]

The present invention relates to an LED lighting device which can improve light efficiency by diffusing light into a wider light emitting area by providing a double housing structure or by providing a light emission inhibiting member inside the light emitting front end housing.

As is well known, LEDs (Light Emitting Diodes) are widely used in liquid crystal displays, electronic displays, dashboards, and the like, and are being developed to be used in automobiles, signs, general lighting, and the like.

These LED lamps consume 20% less power than cold-cathode fluorescent lamps (fluorescent lamps) that use fluorescent materials, and have a long life of up to 10 years and, unlike conventional fluorescent lamps, do not use heavy metals such as lead and mercury. It has the advantage of not causing environmental pollution.

As described above, the LED lamp has a direct structure. A plurality of LEDs are connected to a planar circuit board in a longitudinal direction, connected to each other, and inserted into a tube housing such as glass. It may be formed in a structure that emits light (light) in a direction perpendicular to the.

The LED lamp having the direct structure has a light emission distribution as shown in FIG. 1, and in order to obtain the maximum light emission effect, dozens of LEDs must be installed at narrow intervals along the length of the tube housing, so that the number of LEDs is large. There is a problem that it is necessary, and this problem is directly linked to the rise in product prices, the situation is limited to the practical application. 1 is a view showing a light emission distribution of one LED lamp in the related art.

The present invention is to provide an LED lighting device that can improve the light efficiency by further spreading the light in the light emitting surface by having a double tube housing arranged inside the plurality of LEDs.

In addition, the present invention is to provide an LED lighting device having a double tube housing while changing the shape of the inner tube housing and the outer tube housing, respectively, to further diffuse the light in the light emitting surface to improve the light efficiency.

In addition, the present invention is to provide an LED lighting device that can improve the light efficiency by further diffusing light on the light emitting surface by providing a light emission suppressing member inside the housing of the front end of the light emission while having one housing.

The objects of the embodiments of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description .

According to an embodiment of the present invention, a plurality of LED lamps are provided, respectively coupled to each upper portion of the plurality of circuit boards, and has a hemispherical or heart-shaped cross-section in the form of a tube in the longitudinal direction, the lower portion of the hemisphere Lower ends of the two-sided or heart-shaped inner housings positioned at each upper portion of the plurality of circuit boards in an outwardly bent form to be spaced apart to accommodate the plurality of LED lamps, and a cylindrical tube form in the longitudinal direction. An outer housing having a circular cross section and having a diffusion protrusion for enclosing the inner and outer parts while fixing the plurality of circuit boards and the inner housing inside the lower end and for diffusing light on the inner circumferential surface, and the plurality of circuit boards, respectively. It includes a socket provided on one side or both sides of the outer housing to supply power, An inner housing and an outer housing, an LED lighting apparatus characterized in that it has a diffusing material or a diffusing glass resin material may be provided.

According to another embodiment of the present invention, a plurality of LED lamps are provided, respectively coupled to each upper portion of the plurality of circuit boards, a cylindrical tube in the longitudinal direction, has a circular cross section, the plurality of circuit boards inside the lower end A housing having a diffusion protrusion for diffusing light to the inner circumferential surface while sealing the inside and the outside, and a socket provided at one side or both sides of the housing to supply power to the plurality of circuit boards, respectively. In the inside, the light emission suppressing member for reducing the light transmittance is coupled to the upper end of the same material as the housing, the light emission suppressing member has a form of a flat plate or inclined in the direction in which the plurality of LED lamps are located. An LED lighting device may be provided.

In the present invention, by providing an LED lighting device having an inner housing of the hemispherical shape and the outer housing of the cylindrical shape, the light emitted from the plurality of LED lamps is first diffused through the inner housing, the outer projection is formed on the inner peripheral surface Secondary diffusion through the housing can improve the light efficiency.

In addition, when the thickness of the upper surface (light emitting surface) of the outer housing is thickened or when the light emitting suppressing member is provided, light emission in the center portion can be suppressed, and light can be further diffused to have a wider light emitting area, thereby further improving light efficiency. have.

1 is a view showing a light emission distribution of a conventional LED lamp;
2A and 2B illustrate an LED lighting device according to an embodiment of the present invention.
3 is a cross-sectional view of the LED lighting apparatus according to the embodiment 1-1 of the present invention,
4 is a cross-sectional view of the LED lighting apparatus according to the embodiment 1-2 of the present invention,
5 is a cross-sectional view of the LED lighting apparatus according to the embodiment 1-3 of the present invention,
6 is a cross-sectional view of the LED lighting apparatus according to the embodiment 2-1 of the present invention,
7 is a cross-sectional view of the LED lighting apparatus according to the embodiment 2-2 of the present invention,
8 is a cross-sectional view of the LED lighting apparatus according to the embodiment 2-3 of the present invention,
9 is a cross-sectional view of the LED lighting apparatus according to the embodiment 3-1 of the present invention;
10 is a cross-sectional view of the LED lighting apparatus according to the embodiment 3-2 of the present invention,
11 is a view showing the light emission distribution of one LED lamp according to an embodiment of the present invention,
12A and 12B are views illustrating an arrangement form of the LED lamp according to the embodiment of the present invention.

Advantages and features of embodiments of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2A and 2B illustrate an LED lighting apparatus according to an embodiment of the present invention.

2A and 2B, the LED lighting apparatus according to the embodiment of the present invention includes an outer housing having a cylindrical tube shape (long rod shape), and as shown in Figure 2a at both ends of the outer housing A socket (G13 BASE type same as a conventional fluorescent lamp) for connecting a power source is provided, or as shown in FIG. 2B, a socket (waterproof type using a waterproof cable) for connecting a power supply to one end of an outer housing is provided. Can be prepared.

Such LED lighting devices may be installed alone in an interior space of a house, an office, or the like, or may be arranged (arranged) in outdoor facilities such as a billboard or a signboard.

Inside the outer housing as described above, a plurality of circuit boards are fixedly coupled to the lower end as described below, a plurality of LED lamps are fixedly coupled to each upper portion of the plurality of circuit boards, and the inner housing is wrapped to surround the plurality of LED lamps. It may be prepared in a combined form. Hereinafter, the LED lamp will be positioned to emit light upward, and will be described in detail as a combined form of the cross section.

3 is a cross-sectional view of the LED lighting apparatus according to the embodiment 1-1 of the present invention, FIG. 4 is a cross-sectional view of the LED lighting apparatus according to the embodiment 1-2 of the present invention, Figure 5 is a first view of the present invention 3 is a cross-sectional view of the LED lighting apparatus according to the embodiment.

Referring to FIG. 3, the LED lighting apparatus according to the first embodiment of the present invention may include a plurality of circuit boards 110, a plurality of LED lamps 120, an inner housing 130, an outer housing 140, and the like. It may include.

The plurality of LED lamps 120 are coupled to the upper portions of the plurality of circuit boards 110, respectively, according to signals and power supplies supplied by sockets (power connection sockets) provided on one side or both sides of the outer housing 140. Since the light emitting device is known in the related art in terms of its structure and coupling relationship, a detailed description thereof will be omitted.

In the plurality of LED lamps 120 coupled to the plurality of circuit boards 110, the spacing gradually decreases from the center to the both ends in the longitudinal direction of the outer housing 140 in the form of a cylindrical tube in one LED lighting device. It can be arranged so that the light diffusion efficiency can be improved.

The inner housing 130 may be formed of a diffusion resin material, a diffusion glass material, or the like, and may be manufactured to have a tube shape in a length direction and a cross section of a hemispherical shape or a heart shape with an open lower portion. Here, both lower end portions of the hemispherical shape or the heart shape may be positioned on each upper portion of the plurality of circuit boards 110 in a form in which the plurality of LED lamps 120 are spaced apart from each other to be accommodated.

The lower ends of both sides of the inner housing 130 are positioned at each upper portion of the plurality of circuit boards 110 in a state of being spaced apart by a predetermined distance, and each end may be formed in a shape bent in an outward direction, such as "". Accordingly, the circuit board 110 may be stably mounted on the plurality of circuit boards 110.

The outer housing 140 may be formed of a diffusion resin material, a diffusion glass material, or the like, and may be manufactured to have a cylindrical tube shape in a length direction and have a circular cross section. Inside and outside the lower end of the outer housing 140 can be sealed inside and outside while fixing the plurality of circuit boards 110 and the inner housing 130 seated on the upper portion of the plurality of circuit boards 110, the inner surface Diffusion protrusion 144 may be provided to diffuse the.

Here, the outer housing 140 has a seating groove 141 for seating the plurality of circuit boards 110 inside the lower end so that the arrangement interval gradually decreases from the center to both ends in the longitudinal direction of the outer housing 140. A coupling groove 142 and a coupling protrusion 143 may be provided to couple and fix the end shape (ie, “″” shape) of the lower end of the inner housing 130.

The mounting groove 141, the coupling groove 142 and the coupling protrusion 143 is provided at the lower end of the outer housing 140, the mounting groove 141 has a width corresponding to the width of the plurality of circuit board 110 The lower surface may have a concave shape in an arc shape corresponding to the inner circumferential surface of the outer housing 140, and the side surface may have a height corresponding to the height of the plurality of circuit boards 110.

In addition, the coupling groove 142 is formed to extend in the mounting groove 141, and has a concave shape in the outward direction based on both sides of the mounting groove 141, the height and depth of the lower end of the inner housing 130 It may be formed to correspond to the end shape.

In addition, the coupling protrusion 143 is formed to extend in the coupling groove 142, and to extend inward corresponding to the coupling groove 142, the end may be formed to be supported on the side of the inner housing 130. .

The LED lighting device having such a cross-sectional configuration is provided with sockets (power connection sockets) at one or both ends of the outer housing 140, and can supply power to the plurality of circuit boards 110 through these sockets, respectively.

On the other hand, the LED lighting apparatus according to the embodiment 1-2 of the present invention and the LED lighting apparatus according to the embodiment 1-3 of the present invention is similar to the LED lighting apparatus according to the embodiment 1-1 as described above As the same configuration is described as described above, only the differences will be described below.

Referring to FIG. 4, in the external housing 140 of the LED lighting apparatus, a light emission suppressing region 145 having an upper end portion having a thickness greater than that of both sides may be formed. Here, although the lower surface of the light emission inhibiting region 145 is illustrated as having a flat surface, the diffusion protrusions 144 formed on the inner peripheral surface of both sides of the outer housing 140 may be formed on the lower surface, of course. .

In addition, referring to FIG. 5, an emission suppression member 150 for reducing light transmittance may be coupled to an inner upper end portion of the outer housing 140 of the LED lighting apparatus. The light emission suppressing member 150 may be provided in the form of a diffusion resin plate or a diffusion glass plate.

Here, the upper seating groove 146 and the upper coupling protrusion 147 may be formed on the inner upper end portion of the outer housing 140 so that the light emission inhibiting member 150 may be coupled, and the upper seating groove 146 may emit light. It has a width corresponding to the width of the suppression member 150, the upper surface may be formed in a concave shape in the form of an arc corresponding to the inner peripheral surface of the outer housing 140, the side of the plurality of circuit boards 110 It may have a height corresponding to the height. Here, the concave arc of the seating groove 146 may be formed with a diffusion protrusion 144 like the side portion of the outer housing 140.

In addition, the upper coupling protrusion 147 is formed to extend in the upper seating groove 146, and extends inward to correspond to the upper seating groove 146, the protruding both ends may be formed to be spaced a predetermined distance apart.

Accordingly, by providing an LED lighting device having an inner housing in a hemispherical shape and an outer housing in a cylindrical shape, the light emitted from the plurality of LED lamps is first diffused through the inner housing, and the outer housing having diffusion protrusions formed on the inner circumferential surface thereof. Through the secondary diffusion can improve the light efficiency.

In addition, by increasing the thickness of the upper surface (light emitting surface) of the outer housing or by providing a light emission inhibiting member, light emission in the center portion can be suppressed, and light can be further diffused to have a wider light emitting area, thereby further improving light efficiency. have.

Next, another embodiment of the LED lighting apparatus as described above has a heart shape, a lower portion having an open tube shape, and lower ends of both sides having an inner housing located at each upper portion of the plurality of circuit boards. do.

6 is a cross-sectional view of the LED lighting apparatus according to the embodiment 2-1 of the present invention, Figure 7 is a cross-sectional view of the LED lighting apparatus according to the embodiment 2-2 of the present invention, Figure 8 is a second view of the present invention 3 is a cross-sectional view of the LED lighting apparatus according to the embodiment.

Referring to FIG. 6, the LED lighting apparatus according to the second embodiment of the present invention may include a plurality of circuit boards 210, a plurality of LED lamps 220, an inner housing 230, an outer housing 240, and the like. It may include.

A plurality of LED lamps 220 are coupled to the upper portions of the plurality of circuit boards 210, respectively, according to signals and power supplies supplied by sockets (power connection sockets) provided on one side or both sides of the outer housing 240. Since the light emitting device is known in the related art in terms of its structure and coupling relationship, a detailed description thereof will be omitted.

In the plurality of LED lamps 220 coupled to the plurality of circuit boards 210, the spacing gradually decreases from the center to the both ends in the longitudinal direction of the outer housing 240 in the form of a cylindrical tube in one LED lighting device. It can be arranged so that the light diffusion efficiency can be improved.

The inner housing 230 may be formed of a diffusion resin material, a diffusion glass material, or the like, and may be manufactured to have a tube shape in a length direction and a cross section of a heart shape having an open lower portion. Here, both lower ends of the heart shape may be positioned on each upper portion of the plurality of circuit boards 210 in a form in which the plurality of LED lamps 220 are spaced apart to accommodate the plurality of LED lamps 220.

The lower ends of both sides of the inner housing 230 are positioned at each upper portion of the plurality of circuit boards 210, and each end may be formed to be bent in an outward direction, such as a "" form, and accordingly, a plurality of circuits. The upper surface of the substrate 210 may be stably mounted. That is, the inner housing 230 has a curved upper portion as shown in the shape of a heart in the cross section, two ellipses may be formed to extend on both sides, and both ends of the inner housing 230 may have a shape of "" in a predetermined distance. It may be formed extending in the form bent in the outward direction.

The outer housing 240 is formed of a diffusion resin material, a diffusion glass material, or the like, and may be manufactured to have a cylindrical tube shape in a length direction and have a circular cross section. Inside and outside the lower end of the outer housing 240, while fixing the plurality of circuit boards 210 and the inner housing 230 which is seated on the upper portion of the plurality of circuit boards 210 can be sealed inside and outside, the light on the inner surface Diffusion protrusion 244 may be provided to diffuse the.

Here, the outer housing 240 has a seating groove 241 for seating the plurality of circuit boards 210 inside the lower end of the outer housing 240 in such a way that the arrangement interval gradually decreases from the center to both ends in the longitudinal direction of the outer housing 240. A coupling groove 242 and a coupling protrusion 243 may be provided to couple and fix the end shape (ie, “″” shape) of the lower end of the inner housing 230.

The mounting groove 241, the coupling groove 242 and the coupling protrusion 243 is provided at the lower end of the outer housing 240, the mounting groove 241 has a width corresponding to the width of the plurality of circuit boards 210 The lower surface may have a concave shape in an arc shape corresponding to the inner circumferential surface of the outer housing 240, and the side surface may have a height corresponding to the height of the plurality of circuit boards 210.

In addition, the coupling groove 242 is formed to extend to the mounting groove 241, and has a concave shape in the outward direction based on both sides of the mounting groove 241, the height and depth of the lower portion of the inner housing 230 It may be formed to correspond to the end shape.

In addition, the coupling protrusion 243 is formed to extend to the coupling groove 242, and to extend inward corresponding to the coupling groove 242, the end may be formed to be supported on the side of the inner housing 230. .

LED lighting device having such a cross-sectional configuration is provided with a socket (power connection socket) at one end or both ends of the outer housing 240, it is possible to supply power to each of the plurality of circuit boards 210 through the socket.

On the other hand, the LED lighting apparatus according to the embodiment 2-2 of the present invention and the LED lighting apparatus according to the embodiment 2-3 of the present invention is similar to the LED lighting apparatus according to the embodiment 2-1 as described above As the same configuration is described as described above, only the differences will be described below.

Referring to FIG. 7, in the external housing 240 of the LED lighting apparatus, a light emission suppressing region 245 in which an upper end portion is relatively thicker than both sides may be formed. Here, although the lower surface of the light emission inhibiting region 245 is illustrated as having a flat surface, the diffusion protrusions 244 formed on the inner peripheral surface of both sides of the outer housing 240 may be formed on the lower surface, of course. .

In addition, referring to FIG. 8, a light suppression member 250 for reducing light transmittance may be coupled to an inner upper end portion of the outer housing 2140 of the LED lighting apparatus. The light emission suppressing member 250 may be provided in the form of a diffusion resin plate or a diffusion glass plate.

Here, the upper seating groove 246 and the upper coupling protrusion 247 may be formed on the inner upper end portion of the outer housing 240 so that the light emission suppressing member 250 may be coupled, and the upper seating groove 246 emits light. It has a width corresponding to the width of the suppression member 250, the upper surface may be formed in a concave shape in the shape of an arc corresponding to the inner peripheral surface of the outer housing 240, the side surface of the plurality of circuit boards 210 It may have a height corresponding to the height. Here, the concave arc of the seating groove 246 may be formed with a diffusion protrusion 244 like the side portion of the outer housing 240.

In addition, the upper coupling protrusion 247 is formed to extend in the upper seating groove 246, and extends inward corresponding to the upper seating groove 246, the protruding both ends may be formed to be spaced a predetermined distance.

Accordingly, by providing an LED lighting device having an inner housing in a hemispherical shape and an outer housing in a cylindrical shape, the light emitted from the plurality of LED lamps is first diffused through the inner housing, and the outer housing having diffusion protrusions formed on the inner circumferential surface thereof. Through the secondary diffusion can improve the light efficiency.

In addition, by increasing the thickness of the upper surface (light emitting surface) of the outer housing or by providing a light emission inhibiting member, light emission in the center portion can be suppressed, and light can be further diffused to have a wider light emitting area, thereby further improving light efficiency. have.

Next, another embodiment of the external housing in which the light emission inhibiting member is coupled to the inner upper end portion in the LED lighting apparatus as described above will be described.

9 is a cross-sectional view of the LED lighting apparatus according to the embodiment 3-1 of the present invention, Figure 10 is a cross-sectional view of the LED lighting apparatus according to the embodiment 3-2 of the present invention.

9, the LED lighting apparatus according to the third embodiment of the present invention includes a plurality of circuit boards 310, a plurality of LED lamps 320, a housing 340, a light emission suppressing member 350, and the like. It may include.

Here, since the plurality of circuit boards 310 and the plurality of LED lamps 320 have the same configuration and function as in the case of the embodiment 1-1 of the present invention as described above, only the differences will be described below.

The LED lighting apparatus according to the embodiment 3-1 of the present invention has one housing 320, which may be made of the same material as the outer housing 140 of the embodiment 1-1 as described above. The internal shape may include a seating groove 341 in which a plurality of circuit boards 310 are seated on a lower portion (ie, a rear end of the light emitting surface), and first coupling protrusions protruding to fix both ends of the plurality of circuit boards 310. 342 and a second coupling protrusion 343 and a third coupling protrusion 344 for fixedly coupling the light suppression member 350 in the form of a flat plate to the upper portion (ie, the front of the light emitting surface).

In addition, the inner peripheral surface of the housing 340 may be provided with a diffusion protrusion 345 for diffusing light.

Meanwhile, referring to FIG. 10, the light emission inhibiting member 350 provided at the front of the light emitting surface is formed at the rear end of the light emitting surface (ie, the plurality of LED lamps 320) instead of the flat plate shape described in the third embodiment. ) May be inclined in the direction in which the () is located.

Therefore, by providing the light emission suppressing member inside the housing in front of the light emitting surface, it is possible to improve the diffusivity of the light emitted from the plurality of LED lamps, thereby improving the light efficiency of the LED lighting apparatus.

When the light emission distribution of the LED lighting apparatus as described above is measured, when the LED lamp is located at the position of "0" as shown in FIG. 11, a shape such as a camel is shown, and light is emitted more at both sides than at the center portion. It can be seen that the efficiency is high.

12A and 12B illustrate an arrangement form of the LED lamp according to an exemplary embodiment of the present invention, wherein the plurality of LED lamps A are arranged such that the arrangement interval gradually decreases from the center portion to the both ends in the longitudinal direction. (FIG. 10A) Alternatively, when the plurality of LED lamps A 'are disposed to be relatively narrow in distance from both ends of the LEDs in the longitudinal direction (FIG. 10B), the LED lighting device may have improved balance, and the LEDs may be improved. The power consumption of the lighting device can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be readily apparent that such substitutions, modifications, and alterations are possible.

110, 210, 310: a plurality of circuit boards 120, 220, 320: a plurality of LED lamps
130, 230: inner housing 140, 240, 340: outer housing
150, 250, 350: Luminescence suppressing member

Claims (6)

delete A plurality of LED lamps each coupled to each upper portion of the plurality of circuit boards,
It has a tube shape in the longitudinal direction, and has a hemispherical shape or a heart-shaped cross section with an open bottom, and both bottom ends of the hemispherical shape or heart shape are bent in an outward direction while being spaced apart to accommodate the plurality of LED lamps. Internal housings positioned at upper portions of the plurality of circuit boards,
An outer housing having a cylindrical tube shape in the longitudinal direction and having a circular cross section and sealing the inner and outer parts while fixing the plurality of circuit boards and the inner housing inside the lower end and provided with diffusion protrusions for diffusing light on the inner peripheral surface thereof;
It includes a socket provided on one side or both sides of the outer housing to supply power to each of the plurality of circuit boards,
The inner housing and the outer housing have a diffusion resin material or a diffusion glass material,
The outer housing, the LED lighting apparatus, characterized in that the light emission suppressing region is formed that the thickness of the upper end is relatively thicker than the thickness of both sides.
A plurality of LED lamps each coupled to each upper portion of the plurality of circuit boards,
It has a tube shape in the longitudinal direction, and has a hemispherical shape or a heart-shaped cross section with an open bottom, and both bottom ends of the hemispherical shape or heart shape are bent in an outward direction while being spaced apart to accommodate the plurality of LED lamps. Internal housings positioned at upper portions of the plurality of circuit boards,
An outer housing having a cylindrical tube shape in the longitudinal direction and having a circular cross section and sealing the inner and outer parts while fixing the plurality of circuit boards and the inner housing inside the lower end and provided with diffusion protrusions for diffusing light on the inner peripheral surface thereof;
It includes a socket provided on one side or both sides of the outer housing to supply power to each of the plurality of circuit boards,
The inner housing and the outer housing have a diffusion resin material or a diffusion glass material,
The inside of the outer housing, the LED lighting device is characterized in that the light emission suppressing member for reducing the light transmittance is coupled to the upper end of the same material as the inner housing and the outer housing.
The method according to claim 2 or 3,
The plurality of LED lamps, the LED illumination device is characterized in that the arrangement interval is gradually reduced from the central portion to both ends in the longitudinal direction or the interval between the two end portions are arranged relatively narrower than the interval of the central portion.
A plurality of LED lamps each coupled to each upper portion of the plurality of circuit boards,
A housing having a cylindrical tube shape in a longitudinal direction, a circular cross section, and having a diffusion protrusion for enclosing the inside and the outside while fixing the plurality of circuit boards inside the lower end and diffusing light on the inner circumferential surface thereof;
It includes a socket provided on one side or both sides of the housing to supply power to each of the plurality of circuit boards,
Inside the housing, a light emission suppressing member for reducing the light transmittance is coupled to the upper end of the same material as the housing,
The light emission suppressing member has a flat plate shape or a shape inclined in the direction in which the plurality of LED lamps are located.
The method of claim 5, wherein
The plurality of LED lamps, the LED illumination device is characterized in that the arrangement interval is gradually reduced from the central portion to both ends in the longitudinal direction or the interval between the two end portions are arranged relatively narrower than the interval of the central portion.

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