KR20200058769A - LED lighting apparatus - Google Patents

Abstract

The present invention relates to a LED lighting device for efficiently increasing the overall uniformity by reducing a dark zone in a preset lighting area since diffusion lenses for diffusing light emitted from LED lamps to form an elliptical shape that a light distribution surface has a long axis and a short axis are installed on a circuit board so that a direction of a long axis of a light distribution surface is formed to be inclined from a reference direction.

Description

LED lighting apparatus

The present invention relates to an LED lighting device that is installed on a street light on the side of the road, and in detail, it is installed on the front of each of the LED lamps and the light emitted from the LED lamps so that the light distribution surface forms an elliptical shape having a long axis and a short axis. Diffusion lenses for diffusing the light is provided to be included in one of a plurality of groups having the same direction of the long axis of the light distribution surface, thereby reducing the dark zone of the illumination area and effectively increasing the overall uniformity.

LED (Light Emitting Diode) is a semiconductor device that converts electrical energy into light energy, and is the next generation lighting due to advantages such as low power consumption, high brightness, long life and excellent impact resistance compared to light sources such as incandescent, fluorescent, and sodium lamps. It is in the spotlight as a circle.

In general, a luminaire is a lighting fixture that is installed on sidewalks and driveways to increase the visibility of drivers and pedestrians at night, allowing vehicles and pedestrians to pass safely.

1 is an exemplary view for explaining a conventional LED luminaire.

As shown in FIG. 1, the LED luminaire 100 (hereinafter referred to as a conventional LED luminaire) illuminates the road 101 so that a vehicle driving the road 101 safely runs.

In addition, the conventional LED luminaire 100 has the advantage of excellent lighting efficiency due to the characteristics of the LED that emits high-brightness light.

However, since the LED has excellent straightness of light, but has poor diffusivity, looking at the light distribution surface 110 of the light emitted from the conventional LED luminaire 100, high-brightness light is emitted to the central area 111 of the light distribution surface. However, the luminance decreases sharply toward the peripheral regions 112, 113, and 114.

In addition, since the conventional LED luminaire 100 does not diffuse light, it emits light only in the narrow region 110, thereby reducing the lighting efficiency. Accordingly, a dark zone in which light is not emitted is formed between adjacent luminaires 100 and 100 '. At this time, the dark zone increases the fatigue of the driver's eyes and interferes with the field of view, causing an accident. That is, in the conventional LED luminaire 100, when installed on roads and sidewalks, the dark zone area increases rapidly, and to overcome these problems, the luminaires are installed at narrow intervals, thereby increasing manufacturing and installation costs.

In addition, although the national standard (KS) sets technical standards such as road surface average brightness and comprehensive uniformity so as not to interfere with driver's driving and driving safety, the conventional LED street light 100 in FIG. 1 is presented in the national standard (KS). Does not satisfy the comprehensive system.

In order to overcome this problem, to improve the overall uniformity by forming the substrate on which the LED module is seated, or by installing a diffuser and a lens on the front of the LED module, or by diffusing light using a reflector.

A variety of studies are underway.

However, the LED luminaire that is formed to incline the circuit board requires a large amount of LED lamps according to the inclination of the circuit board, which increases the manufacturing cost and creates a troublesome manufacturing of the housing and the circuit board.

In addition, the LED luminaire that diffuses light using a reflector has a problem of increasing production cost because it must be accompanied by precise design of the reflector structure in order to satisfy the required light distribution surface, and production cost is reduced because the reflector must be purchased and installed separately. This happens.

2 is a perspective view showing a diffusion lens disclosed in Korean Patent No. 10-0890270 (name: a lighting device for a street light equipped with a diffusion lens), and FIG. 3 is light distribution when light is diffused through the diffusion lens of FIG. 2 It is an exemplary view showing a surface.

The diffusion lens 200 of FIG. 2 is a lens that diffuses the light emitted from the LED lamps by being installed on a circuit board as if surrounding the outer surfaces of the LED lamps, and the lens unit 201 formed on the upper side and the circuit formed on the lower side It is composed of a pair of fixing parts 203 and 203 'coupled to a substrate, and an LED lamp (not shown) is installed inside the diffusion lens 200.

In addition, the lens unit 201 is formed in a shape of a pair of peaks with curvature so as to diffuse the light source as wide as possible to the outside (front-to-back direction) so that the light distribution surface forms an elliptical shape having a long axis and a short axis. At this time, the lens unit 201 is compared to the light distribution surface 110 when not passing through the lens unit 201, as shown in Figure 3, the light emitted from the LED lamp installed therein through each of the peak shape 3 The light distribution surface 210 wider than the ship is formed. At this time, the light distribution surface 220 represents the light distribution surface of the adjacent LED street light.

That is, since the diffusing lens 201 diffuses light in an elliptical shape as shown in FIG. 3, the light distribution surface of the conventional LED luminaire 100 of FIG. 1 does not form a long axis, thereby partially solving the problem that the luminaires must be narrowly installed. have.

However, when looking at the light distribution surfaces 210 and 220 of the diffusion lens 200, compared to the light distribution surface 110 of the conventional LED luminaire 100, the overall bacteria system is rapidly increased, but the light distribution surface is formed in an elliptical shape. Since it can be seen that the dark zone (Darkzone) (211), (221) is formed in the corner area.

That is, the LED luminaire using the diffusing lens 200 has the advantage that the total uniformity system is partially increased compared to the conventional LED luminaire 100, but still does not reach the comprehensive uniformity system required by the Korean Standard (KS). There are limits to being installed in India.

The present invention is to solve this problem, the problem of the present invention is a diffusion lens that diffuses light so that the light distribution surface is formed in an elliptical shape that forms a long axis and a short axis, the diffusion lenses are installed on the front of each of the LED lamps It is to provide an LED lighting device that is installed on a circuit board so as to be included in one of a plurality of groups in which the direction of the long axis of the plane coincides, thereby reducing the dark zone of the preset lighting area and effectively increasing the overall uniformity.

In addition, another problem of the present invention is to provide a LED lighting device that can be installed on the circuit board so that the direction of the long axis of the light distribution surface is directed to the installation direction of the street light props, so that the distance between the street lights is wide, thereby reducing the installation cost. It is to do.

In addition, another problem of the present invention is to configure the LED lighting device so that the light distribution surface is symmetrically formed in the same size and shape by constructing such that diffusion lenses having the same direction in the long axis of the light distribution surface are symmetrically installed at the center of the circuit board. It is to provide.

In addition, another problem of the present invention is that the groups are configured to have the same number of diffusion lenses included in each group, so as to provide an LED lighting device so that light is not concentrated in a specific area.

The solution of the present invention for solving the above problems is an LED lighting device mounted on a street light installed along the road direction: a circuit board having a flat plate installed inside the housing; A plurality of LED lamps installed on the circuit board to emit light; It is installed on the outside of each of the LED lamps, and includes a diffusion lens for diffusing light emitted from the LED lamps so that the light distribution surface forms an elliptical shape having a long axis and a short axis, and the diffusion lenses are long axes of the light distribution surface The direction of is formed differently, but is installed on the circuit board so that the absolute value of the angle between the long axis direction of the light distribution surface and the road direction forms a predetermined angle or less.

In addition, another solution of the present invention is an LED lighting device mounted on a street light installed along the road direction: a housing; a circuit board of a flat plate installed inside the housing; A plurality of LED lamps installed on the circuit board to emit light; It is installed on the outside of each of the LED lamps, and includes a diffusion lens for diffusing light emitted from the LED lamps so that the light distribution surface forms an elliptical shape having a long axis and a short axis, and the diffusion lenses are long axes of the light distribution surface When the diffusing lenses having the same direction are included in one group, they are included in any one of a plurality of groups, and the absolute value of the angle between the long axis direction of the light distribution surface of each of the groups and the road direction is equal to or less than a preset angle. will be.

In addition, in the present invention, it is preferable that diffusion lenses having the same direction in the long axis of the light distribution surface are symmetrically installed at the center of the circuit board.

Also, in the present invention, it is preferable that all of the diffusion lenses included in the groups are the same.

In addition, in the present invention, the diffusion lenses are inclined to one of -15 ° to 15 ° in the direction of the long axis of the light distribution surface from a reference direction that is the direction of the long axis when the direction of the long axis of the light distribution surface is the road direction. It is preferably installed.

According to the present invention having the above-described problems and solutions, diffusion lenses for diffusing light emitted from LED lamps to form an elliptical shape forming a long axis and a short axis are included in one of a plurality of groups having a long axis direction of the light distribution surface coinciding. By configuring it as much as possible, the total zone system is increased by reducing the dark zone where light is not emitted within the preset illumination area.

In addition, according to the present invention, the diffusion lens is installed so that the direction of the long axis of the light distribution surface faces the installation direction of the pillars, so that street lights can be installed at wide intervals, thereby reducing installation cost.

In addition, according to the present invention, it is possible to create an excellent cost-effective effect, such as removing the dark zone and increasing the overall system, by simply changing the installation method of the known diffusion lens without structural deformation of the housing and the circuit board or using a reflector.

1 is an exemplary view for explaining a conventional LED luminaire.
2 is a perspective view showing a diffusion lens disclosed in Korean Patent No. 10-0890270 (name: lighting device for a street light equipped with a diffusion lens).
3 is an exemplary view showing a light distribution surface when light is diffused through the diffusion lens of FIG. 2.
4 is a plan view showing an LED lighting device according to an embodiment of the present invention.
5 is a real picture showing the LED lighting device of FIG. 4.
6 (a) is a plan view showing the light distribution surface when the direction of the long axis of the diffusion lens of FIG. 4 is the reference direction, and (b) the direction of the long axis of the diffusion lens of FIG. 4 is 15 ° from the reference direction. It is a plan view showing the light distribution surface when installed inclined with.
7 is a plan view showing a light distribution surface when the diffusion lens of FIG. 4 is installed such that the direction of the long axis is inclined to a size of 15 ° or more from the reference direction.
8 is a plan view showing a light distribution surface of an LED lighting device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described.

4 is a plan view showing an LED lighting device according to an embodiment of the present invention, and FIG. 5 is a real picture showing the LED lighting device of FIG. 4.

The LED lighting device 1 of FIG. 4 includes a housing 3 in which a circular opening groove 31 is formed on the front surface, and a circuit board on which a circuit is printed and inserted and seated in the opening groove 31 of the housing 3 ( 4) and a plurality of LED RAMs installed in each of the installation grooves (not shown) of the circuit board 4

It is composed of a plurality of diffusing lenses 5 that are installed to wrap each of the lamps 7 and the LED lamps 7 to diffuse light emitted from the LED lamps 7. At this time, the LED lighting device 1 preferably further includes a cover (not shown) installed on the front surface of the housing 3, and the cover prevents moisture and foreign matter from flowing inside.

In addition, the LED lighting device 1 is installed on the upper part of the pillar (not shown) vertically installed from the ground to emit light to a predetermined lighting area at a height of at least 12M.

The housing 3 is formed with a power supply device (not shown) for generating power therein and an accommodating space in which wirings for power gaps are installed, and a circular opening groove 31 in which the circuit board 4 is seated on the front surface. It is formed. At this time, in FIG. 4, for convenience of description, the opening groove 31 of the housing 3 is described as being formed in a circular shape, but the shape of the housing 3 is not limited thereto, and may be configured in various shapes. .

The circuit board 4 is a circuit board printed therein, preferably a PCB substrate.

In addition, although the circuit board 4 is not shown in the drawing, a plurality of installation grooves in which LED lamps 7 are seated are formed spaced apart.

The LED lamps 7 are semiconductor elements that convert power energy into light energy, and are installed in each of the installation grooves of the circuit board 4. At this time, the LED lamps 7 form a spherical light distribution surface as is known.

Diffusion lenses 5 are installed on the outside of each of the LED lamps 7 to diffuse the light emitted from the LED lamps 7, in particular, the light distribution surface, such as the diffusion lens 200 of FIG. The light emitted from the LED lamps 7 is diffused to form an elliptical shape having.

At this time, the diffusion lenses 5 are installed on the circuit board so that the long axis of the light distribution surface faces the direction in which the pillars are installed.

In addition, in FIG. 4, the diffusion lens 5 is configured as a rectangular shape, for example, but the shape of the diffusion lens 5 is not limited thereto. At this time, since the diffusion lens 5 is a well-known technology and is a device already released as a product, a detailed description of a method and structure for diffusing light in an elliptical shape will be omitted.

In addition, each of the diffusion lenses 5 forms a light distribution surface of the same shape and size when the light efficiency of the LED lamp 7 accommodated therein is the same.

FIG. 6 (a) is a plan view showing the light distribution surface when the direction of the long axis of the diffusion lens of FIG. 4 is the reference direction, and (b) the direction of the long axis of the diffusion lens of FIG. 4 is 15 ° from the reference direction. 7 is a plan view showing a light distribution surface when installed inclined, and FIG. 7 is a plan view showing a light distribution surface when the diffusion lens of FIG. 4 is installed to be inclined to a size of 15 ° or more from the reference direction.

The diffusion lenses 5 diffuse the light of the LED lamps 7 to form an elliptical light distribution surface having a long axis and a short axis. Hereinafter, as shown in FIG. 6 (a), when the direction of the long axis of the light distribution surface coincides with the road direction, the direction of the long axis will be referred to as a reference direction.

Also, as shown in FIG. 6B, if the diffusion lens 5 is more specific than a diffusion lens (hereinafter referred to as a reference direction diffusion lens) 5 'in which the long axis direction of the light distribution surface forms a reference direction. When installed on the circuit board 4 to be inclined at an angle (), the light distribution surface (B) of the diffusion lens 5 is also formed to be inclined at a specific angle () from the reference direction.

Also, as the light distribution surface B is inclined, the dark zone D1 of the diffusing lens 5 and the dark zone D of the diffusing lens 5 'in the reference direction are also changed. That is, the light distribution surface A in the reference direction forms a dark zone D at the corners of the entire illumination area S, but the light distribution surface B inclined at a specific angle () is the reference light distribution surface A A dark zone D1 partially removing the dark zone D of the opposite edge region formed at is formed.

That is, when the diffusion lens 5 is installed such that the direction of the long axis is inclined at a specific angle () rather than the reference direction, it is possible to emit light to the area not emitted from the reference direction diffusion lens 5 '.

Using these points, the diffusion lenses 5 applied to the present invention are formed such that when the circuit board 4 is coupled, the direction of the long axis of the light distribution surface is inclined to one of -15 ° to 15 ° from the reference direction. Specifically, the diffusion lens 5 is installed on the circuit board 4 so that the absolute value of the angle between the diffusion lenses 5 in the reference direction forms a predetermined angle or less. At this time, the preset angle is preferably 15 °.

If the diffusion lens 5 is installed to be inclined to a size of ± 15 ° or more, the escape areas 71 and 71 'outside the illumination area S on the light distribution surface D2 increase as shown in FIG. In other words, as the light emitted to an area other than the illumination area S increases, the total uniformity of light falls.

In addition, in the diffusion lens 5, the direction of the long axis of the light distribution surface is -15 °, -12 °, -9 °, -6 °, -3 °, 0 °, 3 °, 6 °, 9 °, 12 from the reference direction. It is preferable to be installed on the circuit board 5 so as to be inclined to one of 15 ° and 15 °. If the inclination angle is less than ± 3 ° or if it fluctuates to a size less than ± 3 °, the change in the light distribution surface is too small to expect the effect of the present invention, and the diffusion lens (5) is installed when the diffusion lens (5) is installed. ), It is necessary to perform a precise operation to install a fine size less than ± 3 °, which causes a problem of delay in manufacturing and installation.

In addition, the diffusion lenses 5 may have the same or different directions in the long axis of the light distribution surface. At this time, when the diffused lenses having the same long-axis direction of the light distribution surface are configured as one group, if all of the diffused lenses 5 have the same direction of the long axis of the light distribution surface, they are constituted as one group, and the diffused lenses 5 are If the direction of the long axis of the light distribution surface is all different, it is composed of a plurality of groups equal to the quantity of the diffusing lenses 5.

In addition, as described above, in the present invention, the direction of the long axis of the light distribution surface of the diffusion lens 5 is -15 °, -12 °, -9 °, -6 °, -3 °, 0 °, 3 °, than the reference direction. Since it is configured to be inclined to one of 6 °, 9 °, 12 ° and 15 °, the diffusing lenses 5 are -15 ° group, -12 ° group, -9 ° group, -6 ° group, It is included in one of -3 ° group, 0 ° group, 3 ° group, 6 ° group, 9 ° group, 12 ° group, and 15 ° group.

Also, as shown in FIG. 4, diffusion lenses having the same direction in the long axis of the light distribution surface are symmetrically installed at the center of the circuit board 4. That is, by configuring the inclination angle to be installed with the same size, the amount of light emitted to the illumination area S is uniformly emitted vertically and horizontally.

In addition, the diffusing lenses 5 are arranged on the circuit board 4 such that each of the groups in which the diffusing lenses 5 are contained has the same number of diffusing lenses. If the number of diffusion lenses included in each of the groups is not the same, the light efficiency is reduced because the light distribution surface inclined at an arbitrary angle is concentrated compared to the other light distribution surfaces.

8 is a plan view showing a light distribution surface of an LED lighting device according to an embodiment of the present invention.

As shown in Figure 8, the LED lighting device 1 of the present invention has a dark zone (D1) rapidly compared to the dark zone (D) when the light distribution surface forms a reference direction (when the tilt angle is 0 °) You can see the savings. At this time, the diffusion lenses 5 are -15 °, -12 °, -9 °, -6 °, -3 °, when viewed in a plan view from the installation direction of the diffusion lens when the light distribution surface forms a reference direction. It is installed on the circuit board 4 to be inclined to one of 0 °, 3 °, 6 °, 9 °, 12 °, and 15 °.

In addition, the LED lighting device 1 can increase the total microbial system to more than that specified by the Korean Standard (KS) by emitting light to the existing dark zone (D) area.

As described above, the LED lighting device 1 of the present invention can be used to change the dark zone area by simply changing the direction of the long axis of the light distribution surface, which has been applied in the prior art, without the complicated structural deformation of the housing 3 and the circuit board 4 or the use of a reflector. By removing it, it is possible to effectively increase the overall level of light uniformity.

In addition, the LED lighting device 1 can solve the problem of increasing the cost by installing the conventional LED street lights at a narrow interval by diffusing the light so that the light distribution surface forms an elliptical shape.

1: LED lighting device 3: Housing 4: Circuit board
5: Diffusion lens 7: LED lamp
100: conventional LED street light 101: road
110: light distribution surface

Claims (2)

In the LED lighting device mounted on a street light installed along the road direction:
housing;
A circuit board having a flat shape installed inside the housing;
A plurality of LED lamps installed on the circuit board to emit light;
It is installed on the outside of each of the LED lamps, and includes a diffusion lens for diffusing the light emitted from the LED lamps so that the light distribution surface forms an elliptical shape having a long axis and a short axis, and the diffusion lenses are long axes of the light distribution surface The LED lighting device is characterized in that the direction of each is formed differently, but the absolute value of the angle between the long axis direction of the light distribution surface and the road direction is installed on the circuit board to form a predetermined angle or less. In the LED lighting device mounted on a street light installed along the road direction:
housing;
A circuit board having a flat shape installed inside the housing;
A plurality of LED lamps installed on the circuit board to emit light;
It is installed on the outside of each of the LED lamps, and includes a diffusion lens for diffusing the light emitted from the LED lamps so that the light distribution surface forms an elliptical shape having a long axis and a short axis, and the diffusion lenses are long axes of the light distribution surface When the diffusing lenses having the same direction are included in one group, they are included in any one of a plurality of groups, and the absolute value of the angle between the long axis direction of the light distribution surface of each of the groups and the road direction is equal to or less than a preset angle. LED lighting device, characterized in that.

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