KR20090121652A - Led lighting apparatus - Google Patents

Abstract

PURPOSE: An LED lighting apparatus is provide to reduce power consumption and improve energy efficiency while supplying an effective lighting effect by supplying a uniform light in direction parallel with or vertical to a road or a pavement. CONSTITUTION: In an LED lighting apparatus, a plurality of LEDs is arranged in 2m LED flat panels(Mi,i=±1,±2,..,±m) to form one illumination unit module(610, 620, 630). An angle(i) between an y-axis and the LED flat panel module(Mi) satisfies a relation of ±i<±i± 1(double signs in same order). If luminous flux of the LED plate module(Mi) is Φi, a relation of Φ±i<=Φ±i±1(double signs in same order) and a relation of Φ ±m / Φ ±1>= 5(double signs in same order).

Description

LED lighting device {LED LIGHTING APPARATUS}

The present invention relates to an LED lighting device, and more particularly, to an LED lighting device that can obtain a uniform distribution of light in both the direction parallel to the driveway or sidewalk, and the direction perpendicular to the driveway or sidewalk.

In general, a street lamp is a lighting device installed along a roadway for the safety of street lighting or traffic, and is configured by attaching a lamp having a mercury lamp, sodium, or the like as a light source to a lighting fixture.

Since the street lamps formed by the conventional lamps have disadvantages of high power consumption and short lifespan, various research and development activities for street lamps using LEDs as light sources having a low power consumption and a semi-permanent lifetime have been made.

Currently, the developed LED street light is composed by arranging LEDs in a luminaire formed in a flat surface, but LED is superior to other light sources in terms of power consumption and light brightness, but since the irradiated light has a linear characteristic, the LED street light is installed. The lower part is too bright and the space between the street lamp and the street lamp has a relatively low illuminance.

In addition, the street light should be illuminated so that the road's illumination (or luminance) is uniform for safe driving at night, but when the LED street lamp is installed on the road, the illumination is uneven and the light and dark areas are repeatedly crossed at night. Increase fatigue and cause optical illusion, which adversely affects safe operation.

Accordingly, an LED street light as disclosed in Korean Patent No. 10-0754973 has been proposed as a solution to the above-mentioned problem. Such a street light is to form an inclination angle on the surface of the mounting mechanism of the LED so that the light can be sent far to the side.

In recent years, a street lamp 100 in which LEDs are arranged on a mounting mechanism surface 101 having a curved structure as shown in FIGS. 1A and 1B has been proposed. According to this, since the LEDs are arranged at different densities on the surface of the mounting mechanism of the curved structure, the uniformity of illuminance can be improved to some extent.

However, the above-described LED streetlight has a problem in that the plurality of lanes cannot all be uniformly light due to the characteristic of the LED having a narrow orientation angle. For example, when the LED street lamp of the above-described type is disposed on a one-way two-lane actual road having a lane width of 3.2 m, the distribution of light in a direction perpendicular to the lane is shown in the form shown in FIG. 2. As a result of evaluating the illuminance measured in this way, the luminance ratio is about 0.114, so it is significantly lower than the lighting standard (KS. A 3701 road lighting standard) for drivers of the Korean Industrial Standard. It can be seen that.

More specifically, the lane balance system is a standard for determining a ratio of luminance indicating a uniform degree of brightness distribution visible on a road surface, and is a ratio of minimum value to maximum value of illuminance measurement value, The lighting standard stipulates that 0.7 meets on highways and interstates. However, the above-described LED street light has a luminance ratio of about 0.114 or so, and the uniformity of the brightness distribution is remarkably poor and thus cannot be applied as a street light on an actual road.

The present invention has been proposed in view of the above, by obtaining a uniform distribution of light in both the direction parallel to the roadway and the direction perpendicular to the roadway, by applying as a street light on the actual road to show an effective lighting effect while It is an object of the present invention to provide an LED lighting device that can reduce consumption and improve energy efficiency.

_i)는

_±i＜

_±i±1(복호 동순)의 관계를 만족하고, 상기 LED 평판모듈(Mi)의 광속을 Φ_i 라 할 때, Φ_±i≤Φ_±i±1(복호 동순)의 관계를 만족하며, Φ_±m /Φ_±1≥5(복호 동순)의 관계를 만족하는 것을 특징으로 한다.In order to achieve the above object, the LED lighting device according to the present invention, such as street lights or security lights are arranged and installed continuously along the longitudinal direction (y axis) of the road surface requiring uniform illuminance or luminance distribution on the floor surface. In the lighting device, a plurality of LED light sources are arranged in 2m LED flat panel modules (Mi, i = ± 1, ± 2, ..., ± m) to form one LED lighting unit module, the y-axis and The angle formed by the LED flat panel module (Mi)

_i ) is

_{± i} <

Satisfies the relationship of _{± i ± 1} (decoding order), and when the luminous flux of the LED flat panel module Mi is Φ _i , satisfies the relationship of Φ _{± i} ≤ Φ _{± i ± 1} (decoding order), Φ _It is characterized by satisfying the relationship of _{± m} / Φ _{± 1} ≧ 5 (decoding same order).

Here, the LED light source is made of a LED or a composite of the LED and the lens, the direction angle width (Δη) may be composed of 10 ° to 40 °.

_i)는

_±i＜

_±i±1(복호 동순)의 관계를 만족하고, 상기 LED 평판모듈(Mi)의 광속을 Φ_i 라 할 때, Φ_±i≤Φ_±i±1(복호 동순)의 관계와, Φ_±m /Φ_±1≥5(복호 동순)의 관계를 만족하며, 상기 LED 조명단위모듈 n개를 상기 노면의 폭방향(x축)을 따라 연속적으로 배열하여 하나의 등기구를 형성한 것을 특징으로 한다.In order to achieve the above object, the LED lighting device according to the present invention, such as street lights or security lights are arranged and installed continuously along the longitudinal direction (y-axis) of the road surface requiring uniform illuminance or luminance distribution on the floor surface. In the lighting device, a plurality of LED light source is arranged in each of the 2m LED flat panel module (Mi, i = ± 1, ± 2, ..., ± m) to form one LED lighting unit module, the y-axis And the angle formed by the LED flat panel module Mi

_i ) is

_{± i} <

_When the relation of _{± i ± 1} (decoding order) is satisfied and the luminous flux of the LED flat panel module Mi is Φ _i , the relation of Φ _{± i} ≤ Φ _{± i ± 1} (decoding order) and Φ _{± m} It satisfies the relationship of / Φ _{± 1} ≥ 5 (decoding order), and characterized in that one LED lighting unit is formed by continuously arranging the n LED lighting unit modules along the width direction (x axis) of the road surface.

In addition, the LED light source is composed of an LED or a LED and a lens complex having a direction angle width Δη of 10 ° to 40 °, and the angle between the jth LED lighting unit module and the first LED lighting unit module ψ _j ( When j = 2, 3, 4, ..., n), the relationship of ψ _j <ψ _{j + 1} and (Δη-5 °) / (n-1) ≤ψ _{j + 1} -ψ _j ≤ The relationship of (Δη + 5 °) / (n-1) is satisfied.

At this time, the orientation angle width of the LED or the composite of the LED and the lens may be configured to 25 °.

_i)는

_±1 = 7°,

_±2 = 21°,

_±3 = 35°,

_±4 = 49°,

_±5 = 63°로 구성할 수 있다.The LED light sources are arranged in each of the ten LED flat panel modules (Mi, i = ± 1, ± 2, ..., ± m) to form one LED lighting unit module, and the LED flat panel module and the y-axis are Forming angle (

_i ) is

_{± 1} = 7 °,

_{± 2} = 21 °,

_{± 3} = 35 °,

_{± 4} = 49 °,

It can be configured as _{± 5} = 63 °.

The LED light sources are arranged in ten LED flat panel modules Mi, i = -5, -4, -3, -2, -1, 1, 2, 3, 4, and 5, respectively. The light unit Φ _i of the LED flat panel module satisfies Φ _i = Φ _−i , and Φ ₁ : Φ ₂ : Φ ₃ : Φ ₄ : Φ ₅ = 1: 1: 2: 2: Can be configured to satisfy 7.

In addition, the two LED lighting unit modules are arranged along the x-axis to form a single luminaire, the angle (ψ) formed by the first LED lighting unit module and the second LED lighting unit module (Δη-5 °) ≤ψ It can be configured to satisfy ≤ (Δη + 5 °).

The LED illuminating device of this invention can be comprised so that LED light source may have uniform light distribution characteristic which should have as a street lamp. By applying this principle, it can be applied to various lighting devices such as security lamps requiring the same and similar light distribution characteristics. In addition, the commercialization of LED lighting can be advanced through a technology for adjusting light distribution characteristics, which is one of the main problems to be solved in LED lighting, which has been attracting attention due to power saving and environmental problems.

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

3 is a view schematically showing an installation example of the LED lighting apparatus according to the present invention, Figure 4 is a perspective view schematically showing an example of the LED lighting apparatus according to the present invention.

3 and 4, the LED lighting apparatus according to the present invention, the longitudinal direction (y-axis; direction parallel to the lane of the road surface (a) that requires uniform illuminance or luminance distribution on the bottom surface, that is, road surface It can be applied to the street lights 301, 302, security lights, etc. installed in a continuous arrangement along the longitudinal direction, parallel to the lighting device to be installed, the plurality of LED light source (s) are arranged, installed One LED lighting unit module is composed of LED flat panel module.

The LED lighting device may be constituted by a single LED lighting unit module, but preferably, two or more n LED lighting unit modules are continuously arranged to form one luminaire. At this time, the LED lighting unit module is configured to be arranged along the width direction of the road surface (x axis; continuous along the longitudinal direction of the road surface, the direction perpendicular to the installed lighting device).

In addition, a light emitting diode (LED) applied as a light source arranged in an LED flat panel module generally exhibits Lambertian characteristics with respect to an angle, and has a direction angle width Δη of about η = ± 60 ° (Δη = 120 °). ), You can use additional lenses or modify the shape of the LED to change its characteristics. Here, the directional angle width Δη refers to a range of angles that is half of the brightness at the front.

In the present invention, the LED light source s may be composed of a LED or a complex of LEDs and lenses. In other words, the LED itself may include a condenser lens, or a condenser lens may be installed as a separate additional lens to form a composite.

At this time, the directional angle width Δη of the LED light source s is in a range of ± 5 ° to ± 20 °, but more preferably configured to have an angle of about ± 15 °.

On the other hand, LED lighting unit modules connected to each other in the LED lighting device has a predetermined coupling angle. As an example, when the LED lighting device 500 is configured by two LED lighting unit modules 510 and 520 as shown in FIG. 4, two LED lighting unit modules 510 and 520 are arranged along the x-axis to provide one luminaire. Wherein, the first LED lighting unit module 510 is configured to satisfy the following equation (1) formed by the second LED lighting unit module 520.

(Δη-5 °) ≤ψ≤ (Δη + 5 °)

5 is a perspective view schematically showing another example of the LED lighting apparatus according to the present invention.

Referring to Figure 5, the LED lighting device 600 is composed of three LED lighting unit modules (610, 620, 630), the first LED lighting unit module 610 and the second LED lighting unit module 620 is a combination of ψ ₂ Combined at an angle, the second LED lighting unit module 620 and the third LED lighting unit module 630 is connected to the coupling angle of ψ ₃ . In this way, when n LED lighting unit modules are combined, they have a coupling angle of ψ ₂ , ψ ₃ , ..., ψ _n , where the coupling angle is ψ ₂ <ψ ₃ <... <ψ _n relationship. Must satisfy

And it is preferable to satisfy following formula (2).

ψ _{j + 1} -ψ _j = constant (j = 1, 2, 3, ..., n-1)

In addition, it is more preferable to satisfy the following Equation 3 when an angle between the _jth LED lighting unit module and the first LED lighting unit module is ψ _j (j = 2, 3, 4, ..., n). Do.

(Δη-5 °) / (n-1) ≤ψ _{j + 1} -ψ _j ≤ (Δη + 5 °) / (n-1)

6A and 6B are diagrams schematically showing the LED lighting unit module of the LED lighting apparatus according to the present invention, in which FIG. 6A is a front view (shown in the yz axis), and FIG. 6B is a side view (shown in the xz axis). Drawing). At this time, the z-axis is the height direction of the street light.

_i)는

_±i＜

_±i+1(복호 동순)의 관계를 만족하도록 구성한다One LED lighting unit module 700 applied to the LED lighting apparatus according to the present invention is 2m LED flat panel module (Mi, i = -m + 1, -m + 2, ..., -1, 1, 2 , 3, ..., m) arranged a plurality of LED light sources, respectively, the y-axis and the angle formed by the LED flat panel module (Mi) (

_i ) is

_{± i} <

Configure to satisfy the relationship of _{± i + 1} (decoding same order)

For example, as shown in FIG. 6A, the LED lighting unit module 700 includes a plurality of LED flat panel modules 701, 701 ′, 702, 702 ′, 703, 703 ′, 704, 704 ′, 705, 705 ′. The LED flat panel modules 701, 701 ', 702, 702', 703, 703 ', 704, 704', 705, 705 'are preferably at least six, and the LED flat panel modules 701, 701', 702, 702 ', 703, 703' in the LED lighting unit module 700. (704, 704 ', 705, 705') has a structure symmetric about the z axis.

_i는 수학식4를 만족하는 것이 편리하고, 수학식5를 만족하는 것이 바람직하다.At this time, the angle formed by each of the LED flat panel modules 701, 701 ', 702, 702', 703, 703 ', 704, 704', 705, 705 'with the y-axis

It is convenient for _i to satisfy (4), and it is preferable to satisfy (5).

_-1 + ₁ = Δ

_-1 + ₁ = Δ

On the other hand, the LED lighting unit module satisfies the relationship of Φ _{± i} ≤ Φ _{± i ± 1} (decoding order) when the luminous flux of the LED flat panel module (Mi) is Φ _i , and Φ _{± m} / Φ _{± 1} ≥ 5 It is configured to satisfy the relationship of (decoding same order).

For example, as shown in FIG. 6A, the LED lighting unit module 700 includes LED flat panel modules 701 701 ′, 702 702 ′, and 703 703 ′ to secure uniformity of illuminance in the y-axis direction. Φ ₁ , Φ ₂ , Φ ₃ , Φ ₄ , and Φ ₅ at, 704, (704 ') and 705 (705'), respectively, Φ ₁ ≤Φ ₂ ≤Φ ₃ ≤Φ ₄ ≤Φ ₅ It should be configured to satisfy the relationship and at the same time satisfy the relationship of Φ ₅ / Φ ₁ ≥5.

In addition, the plurality of LED flat panel modules 701, 701 ', 702, 702', 703, 703 ', 704, 704', 705, 705 'are each composed of a separate member and assembled into a single LED lighting unit module 700, or a plurality of LED flat panel modules It may be configured to satisfy the above conditions and relationships by a single member.

Hereinafter, an LED lighting apparatus according to an embodiment of the present invention will be described.

As shown in FIG. 3, the LED lighting apparatus according to the present invention is configured as a street lamp, but the installation height H is 10 m, the distance D between the street lamps is 35 m, and the length OH at the street lamps 301 and 301. Overhangs 311 and 312 which are 1 m are installed, and the LED lighting devices 321 and 322 are mounted at their ends.

The LED lighting devices 321 and 322 are 150 watts (W) class, but use 52 3 watt (W) class LED packages, and control the amount of current input to the LED package, so that the power consumption of the LED is 150 in one street light. Adjust to wattage (W). At this time, the LED light source uses a lens so that the beam angle width is Δη = 25 °.

In addition, the LED lighting unit module is composed of two, as shown in Figure 4, the combined angle (ψ) of each LED lighting unit module is 25 °, 26 LED and the lens complex arranged in each LED lighting unit module To form as shown in FIG. 6A.

_i)를

_±1 = 7°,

_±2 = 21°,

_±3 = 35°,

_±4 = 49°,

_±5 = 63°로 하고, LED 평판모듈 701(701'):702(702'):703(703'):704,(704'):705(705')의 광속을 Φ₁:Φ₂:Φ₃:Φ₄:Φ₅ 라 할 때, 그 비를 1:1:2:2:7이 되도록 한다.At this time, the angle formed between the LED flat panel modules 701, 701 ', 702, 702', 703, 703 ', 704, 704', 705, 705 'and the y-axis (

_i )

_{± 1} = 7 °,

_{± 2} = 21 °,

_{± 3} = 35 °,

_{± 4} = 49 °,

_{± 5} = to 63 ° and, LED flat plate modules 701 (701 '): 702 (702'): 703 (703 '): 704, (704'): 705 to Φ ₁ a light flux (705 '): Φ _2: When Φ ₃ : Φ ₄ : Φ ₅ , let the ratio be 1: 1: 2: 2: 7.

Figure 7 is a view for explaining a uniformity measuring method of the LED lighting apparatus according to the present invention, Figures 8a and 8b is a graph showing the illuminance distribution of the LED lighting apparatus according to an embodiment of the present invention, Figure 8a is x The illuminance distribution in the axial direction (direction perpendicular to the lane) is shown, and FIG. 8B shows the illuminance distribution in the y-axis direction (direction parallel to the lane).

The LED lighting device configured as described above was configured as a street lamp on a one-way two-lane road having a lane width of 3.2 m, and it was checked whether the illumination meets the lighting standard for the driver defined by the Korean Industrial Standard. There are various methods of measuring illuminance, but the 30-point illuminance measurement method is preferred.

This, a 30-point roughness measurement method intervals in the y-axis direction as shown in Fig. 7 (D _0, D ₁₎ to _{D 0: D 0 = 1.75m,} D 1 so as to satisfy the proportion of _1: D 1 = 0.5 a = 3.5m, and the distance in the x-axis direction (W _O, W ₁₎ a _{W O: W 1 = 0.5:} 30 of the measurement point to a _{W O = 1.066m, W 1 =} 2.133m to satisfy the proportion of the 1 ( p).

As a result of measuring illuminance from each measuring point shown in FIG. 7, the illuminance distribution of the measuring points w in the x-axis direction (direction perpendicular to the lane) was shown as a measurement as shown in FIG. 9a, and the y-axis direction (lane In the direction parallel to the illuminance distribution of the measurement points l were shown as measurements, as shown in FIG.

Based on the measurement results, the lane balance system was calculated to be about 0.724, and this value was 0.7 standard of lighting standard (KS. A 3701 road lighting standard) for drivers of Korean Industrial Standard. It can be seen that the value is exceeded and the relevant criteria are satisfied.

In addition, a comprehensive bacterium calculated on the basis of the measurement result (a ratio of luminance indicating a uniform degree of the surface luminance distribution, and the ratio of the minimum value to the roughness average value of 30 measurement points should be 0.4 or more) is 0.4. It is exceeded and it turns out that the said standard is satisfied.

What has been described above is only one embodiment for implementing the LED lighting apparatus according to the present invention, the present invention is not limited to the above-described embodiment, the subject matter of the present invention as claimed in the following claims Any person with ordinary skill in the art to which the present invention pertains without departing from the scope of the present invention will have the technical idea of the present invention to the extent that various modifications can be made.

1a and 1b is a front view and a side view for explaining a conventional LED lighting device,

2 is a graph illustrating the illuminance distribution of a conventional LED lighting apparatus;

3 is a view schematically showing an installation example of an LED lighting apparatus according to the present invention;

4 is a perspective view schematically showing an example of an LED lighting apparatus according to the present invention;

5 is a perspective view schematically showing another example of the LED lighting apparatus according to the present invention;

6a and 6b schematically show the LED lighting unit module of the LED lighting apparatus according to the present invention;

7 is a view for explaining a method for measuring uniformity of the LED lighting apparatus according to the present invention;

8A and 8B are graphs showing the illuminance distribution of the LED lighting apparatus according to the embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

500,600: LED lighting device

701,701 ', 702,702', 703,703 ', 704,704', 705,705 ': LED flat panel module

510,520,610,620,630,700: LED lighting unit module

s: LED light source

Claims (8)

In a lighting device that is continuously arranged and installed along the longitudinal direction (y-axis) of the road surface requiring a uniform illuminance or luminance distribution on the floor, such as a street lamp or security light, A plurality of LED light sources are arranged in 2m LED flat panel modules (Mi, i = ± 1, ± 2, ..., ± m) respectively to constitute one LED lighting unit module, the y-axis and the LED flat panel module ( The angle of Mi

_i ) is

_{± i} <

Satisfies the relationship of _{± i ± 1} (decoding order), and when the luminous flux of the LED flat panel module Mi is Φ _i , satisfies the relationship of Φ _{± i} ≤ Φ _{± i ± 1} (decoding order), Φ LED lighting device characterized by satisfying the relationship of _{± m} / Φ _{± 1} ≥ 5 (decoding order). The method of claim 1, The LED light source is made of LED or LED and a composite of the lens and the LED, characterized in that the direction angle width (Δη) is 10 ° to 40 °. In a lighting device that is continuously arranged and installed along the longitudinal direction (y-axis) of the road surface requiring a uniform illuminance or luminance distribution on the floor, such as a street lamp or security light, A plurality of LED light sources are arranged in 2m LED flat panel modules (Mi, i = ± 1, ± 2, ..., ± m) respectively to constitute one LED lighting unit module, the y-axis and the LED flat panel module (Mi) angle (

_i ) is

_{± i} <

_When the relation of _{± i ± 1} (decoding order) is satisfied and the luminous flux of the LED flat panel module Mi is Φ _i , the relation of Φ _{± i} ≤ Φ _{± i ± 1} (decoding order) and Φ _{± m} / Φ _{± 1} ≥5 (decoding same order) N LED lighting unit modules are arranged in a row along the width direction (x-axis) of the road surface LED lighting device, characterized in that to form one luminaire. The method of claim 3, The LED light source is composed of a LED or LED and a lens and a composite having a direction angle width (Δη) of 10 ° to 40 °, When the jth LED illumination unit module makes an angle between the first LED illumination unit module and ψ _j (j = 2, 3, 4, ..., n), the relationship between ψ _j <ψ _{j + 1} , ( An LED lighting apparatus characterized by satisfying a relationship of Δη-5 °) / (n-1) ≦ ψ _{j + 1} −ψ _j ≦ (Δη + 5 °) / (n-1). The method according to claim 2 or 4, LED lighting device characterized in that the directivity angle width of the LED or the composite of the LED and the lens is 25 °. The method of claim 4, wherein The LED light sources are arranged in each of the ten LED flat panel modules (Mi, i = ± 1, ± 2, ..., ± m) to form one LED lighting unit module, and the LED flat panel module and the y-axis are Forming angle (

_i ) is

_{± 1} = 7 °,

_{± 2} = 21 °,

_{± 3} = 35 °,

_{± 4} = 49 °,

LED lighting device, characterized in that _{± 5} = 63 °. The method according to any one of claims 2, 4, and 6, The LED light sources are arranged in ten LED flat panel modules Mi, i = -5, -4, -3, -2, -1, 1, 2, 3, 4, 5, respectively, and the LED lighting unit Module, the luminous flux Φ _i of each of the LED flat panel modules satisfies Φ _i = Φ _-i , and Φ ₁ : Φ ₂ : Φ ₃ : Φ ₄ : Φ ₅ = 1: 1: 2: 2: 7 LED lighting apparatus characterized in that it satisfies. The method according to claim 3 or 4, The two LED lighting unit modules are arranged along the x-axis to form one luminaire, wherein the angle ψ formed by the first LED lighting unit module and the second LED lighting unit module is (Δη-5 °) ≤ψ≤ (Δη + 5 °) to satisfy the LED lighting device.

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