KR20100016723A - Led lighting fixtures - Google Patents

Abstract

PURPOSE: An LED(Light Emitting Diode) lighting fixture is provided to obtain the lighting effect of high efficiency by minimizing the back emitted light. CONSTITUTION: A lighting unit module(310) comprises a plurality of LED planar modules arranged symmetrical to each other with a reference to the z axis. An LED flat module arranges the LED light sources emitting the light. An LED light source(312) comprises an LED or a complex of LED and lens.

Description

LED lighting device {LED LIGHTING FIXTURES}

The present invention relates to an LED lighting device, and more particularly, to an LED lighting device capable of irradiating as much light as possible within the main irradiation range.

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 a lighting device composed of a conventional light source has a disadvantage of high power consumption and short lifespan, various research and development activities for street lamps using LED as a light source having a significantly low power consumption and a semi-permanent life have been made.

Currently, the developed LED street light has been configured by arranging LEDs in a luminaire formed in a plane, but the lower portion of the LED street lamp is installed is too bright while the space between the street lamp and the street lamp has a relatively dark disadvantage.

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. It increases fatigue and causes optical illusions and acts as a factor to impair safety.

The present applicant has proposed 'LED street light' in which LEDs are arranged and configured on a luminaire formed in a convex form without arranging LEDs on a luminaire formed in a plane by Korean Patent Application No. 10-2008-0047658. As shown in Figs. 1A and 1B, there is proposed a street light 100 in which LEDs are arranged on a mounting mechanism surface 101 having a curved structure. 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.

The LED street light 200 is configured as a single LED lighting whole module 210 by a plurality of LED lighting unit modules (211,212), as shown in Figure 2, LED lighting unit modules (211,212) is a plurality of LED The flat panel modules 211a and 212a are arranged in a hemispherical shape, and the LED flat panel module is composed of one metal PCB by arranging LEDs or a composite 213 of LEDs and lenses.

The LED lighting module 210 is disposed inside the lighting case 220 having a predetermined shape together with a power supply (not shown). Lighting case 220 is a front case 221 formed of a material such as acrylic in the irradiation direction (road side), and a rear case 222 coupled to the opposite side of the front case 221 and formed of a metal material such as aluminum Consists of. The front case 221 is formed in a convex shape along the outer shape of the LED lighting whole module 210. In this case, the front case 221 may also provide a diffusion function for uniformity in light distribution.

3 is a view schematically showing an installation example of a general street lamp, as shown in the street lamp 200 is installed so as to cross each other on both sides of the driveway. In the street lamp 200 installed as described above, for example, the area to be irradiated by the street lamp 200 is a main irradiation area b having a rectangular shape displayed on the roadway. Depending on the structure of the street lamp, the light from this street lamp may produce light (d) that is irradiated to other areas of the ground, in addition to the light (c) that is irradiated to the main irradiation area (b), or even a backlight (e) directed toward the sky. have. It is important to reduce the amount of light (d, e) irradiated in a range other than the main irradiation area 260 to secure a larger amount as much as possible in the main irradiation area (b). It causes glare for the driver or user and significantly reduces the efficiency of the luminaire because these requirements are not met.

The present invention has been proposed in view of the above, by blocking the rear light, and to minimize the glare of the driver or user, while irradiating a large amount of light within the main irradiation range, LED to enable a high efficiency lighting effect The purpose is to provide a lighting device.

_i (i= -n, -n+1, -n+2, ..., -1,1,2,3, ...,n)의 각도를 이루고 있으며, 이웃하는 상기 LED 평판모듈이 서로에 대하여 이루는 각(

_±i±1 -

_±i 또는

₊₁+

_-1, i=1,2,3 ..., n-1, 복호동순)이 150° 이상 175°이하의 범위에 있으며, 상기 LED 광원들이 상기 LED 평판모듈의 오목한 부위에 해당되는 내면에 설치되도록 구성된 것을 특징으로 한다.In order to achieve the above object, the LED lighting apparatus according to the present invention, the LED lighting apparatus is installed in a place that needs a uniform illuminance or luminance distribution on the bottom surface, the LED lighting apparatus is a plurality of LED light sources arranged It includes an LED lighting unit module configured by the LED flat panel module, wherein the LED lighting unit module is the angle formed by 2n (n is a natural number of 3 or more) the LED flat panel module arrangement direction (y-axis) of the LED lighting device

_i (i = -n, -n + 1, -n + 2, ..., -1,1,2,3, ..., n) and the neighboring LED flat panel modules The angle formed by

_{± i ± 1-}

_{± i} or

₊₁ +

_-1 , i = 1,2,3 ..., n-1, decoding order) is in the range of 150 ° or more and 175 ° or less, the LED light sources are installed on the inner surface corresponding to the recessed portion of the LED flat panel module Characterized in that configured to.

_i (i= -n, -n+1, -n+2, ..., -1,1,2,3, ...,n)의 각도를 이루고 있으며, 이웃하는 상기 LED 평판모듈이 서로에 대하여 이루는 각(

_±i±1 -

_±i 또는

₊₁+

_-1, i=1,2,3 ..., n-1, 복호동순)이 150° 이상 175°이하의 범위에 있으며, 상기 LED 광원들이 상기 LED 평판모듈의 오목한 부위에 해당되는 내면에 설치되도록 구성되고, m(m은 2 이상의 자연수)개의 상기 LED 조명단위모듈을 y축에 수직한 방향(x축)을 따라 연속적으로 배열하여 구성한 것을 특징으로 한다.And, in order to achieve the above object, the LED lighting apparatus according to the present invention, the LED lighting apparatus is installed in a place that needs a uniform illuminance or luminance distribution on the bottom surface, the LED lighting apparatus is arranged LED light source It includes an LED lighting unit module consisting of a plurality of LED flat panel module, wherein the LED lighting unit module is 2n (n is a natural number of 3 or more) that the LED flat panel module and the array direction (y-axis) of the LED lighting device Angle

_i (i = -n, -n + 1, -n + 2, ..., -1,1,2,3, ..., n) and the neighboring LED flat panel modules The angle formed by

_{± i ± 1-}

_{± i} or

₊₁ +

_-1 , i = 1,2,3 ..., n-1, decoding order) is in the range of 150 ° or more and 175 ° or less, the LED light sources are installed on the inner surface corresponding to the recessed portion of the LED flat panel module It is configured so that m (m is a natural number of two or more) is characterized in that the LED lighting unit modules are arranged in series along the direction (x-axis) perpendicular to the y-axis.

Here, when the coupling angles of the m LED lighting unit modules are ψ ₁ , ψ ₂ , ..., ψ _{m- 1} , ψ _j ≤40 ° (j = 1,2, ..., m-1) It can be configured to be in the range of.

When the luminous flux of the 2n LED flat panel modules is Φ _{± 1} , Φ _{± 2} , Φ _{± 3} , ..., Φ _{± n} , respectively, Φ _± 1≤Φ _± 2≤ ... ≤Φ _{± n} (Decoding order) ) And at the same time satisfy the relationship Φ _{± n} / Φ _{± 1} ≥ 3.

In addition, the LED light source is composed of a LED or a composite of the LED and the lens, the direction angle width (Δη) can be configured in the range of ± 5 ° or more and ± 50 ° or less.

The LED lighting device of the present invention has a uniform light distribution characteristic which should be provided as a street lamp and at the same time can minimize the glare of the driver as the light does not leave the main irradiation area, and the rear light is minimized to exhibit a high efficiency lighting effect. have. By applying this principle, it can be applied to various lighting devices including security light, security light, tunnel light or indoor light. As a result, the technology level of the LED lighting industry, which has been attracting attention for power saving and environmental problems, can be advanced.

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

Figure 4a is a simplified view showing the overall shape of the LED lighting unit module in the LED lighting apparatus according to the present invention, Figure 4b is a view showing the longitudinal cross-sectional structure of Figure 4a. For convenience, the direction in which the lighting device such as a street lamp is arranged is referred to as the y axis, the direction perpendicular to the arrangement direction from the floor surface is the x axis, and the direction from the lighting device to the floor surface using the left-handed coordinate system is called the z axis. Reference)

4A and 4B, the LED lighting apparatus according to the present invention is a street light that is continuously arranged along the y-axis (continuous along the longitudinal direction of the road surface, the installation direction of the street light is installed) that requires lighting It can be applied to a security light or the like, LED light source (not shown) by using a plurality of LED flat panel module 311 arranged and installed to configure one LED lighting unit module 310.

The LED lighting unit module 310 is arranged such that the plurality of LED flat panel modules 311 are arranged to correspond to each other on the basis of the z-axis so that the shape shown on the longitudinal section has an approximately arc shape. At this time, one LED flat panel module 311 may be composed of one metal PCB.

In the present invention, for convenience, the ten LED flat panel modules 311 constitute one LED lighting unit module, and the LED flat panel module 311 is provided with an array of LED (Light emitting diode) light sources for emitting light. As shown in 4b, it is very important to configure the internal surface corresponding to the concave portion of the arc formed by the LED flat panel modules 311. That is, in the prior art, the LED light source 312 is located on the convex surface of the LED lighting unit module 300, whereas in the present invention, the LED light source 312 is located on the concave surface of the LED lighting unit module.

The LED light source 312 may be composed of an 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.

LEDs generally exhibit Lambertian characteristics with respect to angles, which can be changed by using additional lenses or by designing the internal structure of the LEDs. Here, the direction angle width Δη refers to the range of angles that are half of the brightness when the maximum brightness is shown at a predetermined angle (mainly 0 °).

Although the present invention employs a relatively narrow beam angle, the value is preferably in the range of ± 5 ° or more and ± 50 ° or less.

Figure 5 is a simplified view showing the longitudinal cross-sectional structure of the LED lighting unit module in the LED lighting apparatus according to the present invention, in this figure omit the illustration of the LED light source for convenience.

_i (i= -n, -n+1, ..., -1,1,2, ...,n)라 한다면, 하기 수학식1의 관계를 만족하는 것이 편리하다. 여기서,

_i 는 각각의 LED 평판모듈(311)이 y축과 이루는 각도, 즉, 가로등이 배열된 방향과 이루는 각도를 의미한다.Referring to FIG. 5, in the LED lighting unit module 300, the LED flat panel modules 311 are symmetric with respect to the z axis and arranged at a predetermined angle with the y axis. Each angle formed by 2n LED flat panel modules 311

_{If i} (i = -n, -n + 1, ..., -1, 1, 2, ..., n), it is convenient to satisfy the relationship of the following formula (1). here,

_i means an angle formed by each of the LED flat panel module 311 with the y-axis, that is, the angle formed with the direction in which the street light is arranged.

5°≤ (_±i±1 - _±i ) ≤ 30° (i=1,2 ..., n-1, 복호동순)

5 ° ≤ ( _{± i ± 1- ± i} ) ≤ 30 ° (i = 1,2 ..., n-1, decoding order)

And it is more preferable to satisfy the relationship of the following formula (2).

5°≤ (₁ - _-i ) ≤ 30°

5 ° ≤ ( ₁ -- _i ) ≤ 30 °

In other words, the LED flat panel 311 neighboring each other has an angle of 150 ° or more and 175 ° or less with respect to each other. If the above conditions (Equations 1 and 2) are satisfied, when the 2n LED flat panel modules 311 are symmetrically disposed about the z-axis, the LED lighting unit module 300 having an approximately arc shape is obtained. You lose. At this time, n is configured to be three or more natural numbers. That is, it is preferable that the LED flat panel module 311 is composed of six or more.

On the other hand, when the luminous flux of each of the 2n LED flat panel module 311 is Φ _{± 1} , Φ _{± 2} , Φ _{± 3} , ..., Φ _{± n} , it should satisfy the following equation (3) and equation (4) at the same time .

Φ _{± 1} ≤Φ _{± 2} ≤ ... ≤Φ _{± n} (decoding order)

Φ _{± n} / Φ _{± 1} ≥3 (decoding order)

And, there can be a variety of methods for changing the luminous flux of each LED flat panel module 311, each of the LED flat panel module 311 to arrange a different amount of LED light source and of the current flowing through each LED One example is to keep the amount constant. As another method, there is a method of arranging LEDs of the same quantity in all the LED flat panel modules 311 and changing the amount of current flowing through each LED to obtain different luminous fluxes. In addition, the above two methods may be used in combination.

Figure 6a is a simplified view of the LED lighting apparatus according to an embodiment of the present invention, Figure 6b is a simplified view of the LED lighting apparatus according to another embodiment of the present invention.

The LED lighting device 300 may be constituted by a single LED lighting unit module 310, but preferably, two or more m LED lighting unit modules 310 are continuously arranged to form one luminaire.

For example, as shown in FIG. 6A, the LED lighting device 300 is constituted by two LED lighting unit modules 310. At this time, the two LED lighting unit module 310 is coupled at an angle of ψ ₁ .

And, as shown in Figure 6b LED lighting device 300 is composed of three LED lighting unit module (310). At this time, the three LED lighting unit module 310 is coupled at an angle of ψ ₁ , ψ ₂ .

On the other hand, in configuring the entire module of the LED lighting device using the m LED lighting unit module 310, the coupling angle with the neighboring LED lighting unit module 310 is ψ ₁ , ψ ₂ , ..., ψ _{In the case of m-1} , each coupling angle is preferably determined within 40 ° of ψ _j (j = 1, 2, ..., m-1).

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

The LED lighting device 300 as shown in FIG. 6A is configured by using two LED lighting unit modules 310 formed in the shapes shown in FIGS. 4A and 4B. The LED lighting unit module 310 is composed of ten LED flat panel module 311, and at this time, the angle formed by the two neighboring LED flat panel module 311 is 12 ° each.

It is important to install the LED light source 312 in the LED flat panel module to be arranged on the concave inner surface of the LED lighting unit module (310). Combination angle (ψ) between the two LED lighting unit module 310 to 20 ° to configure the whole module, and then placed in the lighting case. At this time, except for the light emitting part by the LED light source 312 to use the reflection shade to minimize the absorption of light in the interior.

Figure 7 is a graph measuring the change in brightness according to the angle of the LED lighting apparatus according to an embodiment of the present invention. Measurements were made on the yz plane, where the angle is the angle between the z-axis and the imaginary line from the streetlight.

7, the luminance (indicated by the solid line) in the range of -60 ° to + 60 ° representing the main irradiation range of the LED street light according to an embodiment of the present invention is indicated by the dashed-dotted line. It can be seen that the measured value is higher than. That is, the LED lighting apparatus according to the present invention can be seen that a relatively larger amount of light is irradiated within the main irradiation range than the conventional street light. In particular, the LED lighting device 300 according to an embodiment of the present invention can be seen that there is almost no light irradiated at an angle of more than 80 °. This means that no back-illumination is generated, thereby demonstrating high efficiency lighting effect.

What has been described above is only an embodiment for implementing the LED lighting apparatus according to the present invention, the present invention is not limited to the above-described embodiment, and do not depart from the gist of the present invention as claimed in the following claims. Anyone skilled in the art to which the present invention pertains within the scope will have the technical idea of the present invention to the extent that various modifications can be made. For example, the LED lighting unit module may be configured in singular rather than plural, and may be used for indoor lighting or tunnel lighting.

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

2 is a view schematically showing a configuration example of a conventional LED lighting apparatus;

3 is a view schematically showing an example of installation of a general street light;

Figure 4a is a simplified view showing the overall shape of the LED lighting unit module in the LED lighting apparatus according to the present invention,

4B is a view showing the longitudinal cross-sectional structure of FIG. 4A;

Figure 5 is a simplified view showing the longitudinal cross-sectional structure of the LED lighting unit module in the LED lighting apparatus according to the present invention,

Figure 6a is a simplified view showing the LED lighting apparatus according to an embodiment of the present invention,

Figure 6b is a simplified view showing the LED lighting apparatus according to another embodiment of the present invention,

Figure 7 is a graph measuring the change in brightness according to the angle of the LED lighting apparatus according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

300: LED lighting device

310: LED lighting unit module

311: LED flat panel module

312: LED light source

Claims (5)

In the LED lighting device installed in a place that needs a uniform illuminance or luminance distribution on the floor,  The LED lighting device includes an LED lighting unit module configured by a plurality of LED flat panel modules, the LED light source is arranged, The LED lighting unit module is the angle formed by 2n (n is a natural number of 3 or more) of the LED flat panel module with the array direction (y-axis) of the LED lighting device

_i (i = -n, -n + 1, -n + 2, ..., -1,1,2,3, ..., n) and the neighboring LED flat panel modules The angle formed by

_{± i ± 1-}

_{± i} or

₊₁ +

_-1 , i = 1,2,3 ..., n-1, decoding order) is in the range of 150 ° or more and 175 ° or less, the LED light sources are installed on the inner surface corresponding to the recessed portion of the LED flat panel module LED lighting device, characterized in that configured to. In the LED lighting device installed in a place that needs a uniform illuminance or luminance distribution on the floor,  The LED lighting device includes an LED lighting unit module configured by a plurality of LED flat panel modules, the LED light source is arranged, The LED lighting unit module is the angle formed by 2n (n is a natural number of 3 or more) of the LED flat panel module with the array direction (y-axis) of the LED lighting device

_i (i = -n, -n + 1, -n + 2, ..., -1,1,2,3, ..., n) and the neighboring LED flat panel modules The angle formed by

_{± i ± 1-}

_{± i} or

₊₁ +

_-1 , i = 1,2,3 ..., n-1, decoding order) is in the range of 150 ° or more and 175 ° or less, the LED light sources are installed on the inner surface corresponding to the recessed portion of the LED flat panel module Configured to  m (m is a natural number of two or more) LED lighting unit, characterized in that configured to be arranged continuously along the direction (x axis) perpendicular to the y-axis. The method of claim 2, The m LED lighting unit modules coupled to the angle _{ψ 1, ψ 2, ...,} ψ m- 1 referred to _{when, ψ j ≤40 ° (j =} 1,2, ..., m-1) range LED lighting device, characterized in that configured to. The method according to any one of claims 1 to 3, 2n of the LED flat plate modules, each light beam _{Φ ± 1, Φ ± 2,} Φ ± 3, ..., Φ to as _{± n, Φ ± 1 ≤Φ ±} 2 ≤ ... ≤Φ ± n ( decoding dongsun LED lighting device, characterized in that it is configured to satisfy the relationship of) and at the same time the relationship of Φ _{± n} / Φ _{± 1} ≥ 3. The method of claim 4, wherein The LED light source is composed of a LED or LED and a composite of the lens and the LED, the direction angle width (Δη) of the LED lighting device, characterized in that configured in the range of ± 5 ° or more and ± 50 ° or less.

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