KR20150094267A - Indirect led light apparatus - Google Patents

Abstract

The present invention relates to a tubular LED lamp applying an indirect emission method capable of illuminating an indoor or outdoor part by reflecting light from an LED by a reflector. The present invention provides the LED lamp applying the indirect emission method capable of reducing the weight of a product by applying an Mg heat sink, improving Klm/￦ by decreasing the reduced luminous efficiency due to an existing optical diffusion sheet, and removing discomfort glare by applying the indirect emission method by implementing a new LED lamp system of the indirect emission method applying a heat sink using Mg and reflective paint with high reflectivity.

Description

INDIRECT LED LIGHT APPARATUS < RTI ID = 0.0 >

[0001] The present invention relates to an LED lighting fixture to which an indirect illumination method is applied, and more particularly, to an indirect lighting type LED lighting fixture which reflects light of an LED light source to a reflector to illuminate indoor or outdoor.

Generally, LED has advantages such as small power consumption, semi-permanent lifetime, impact resistance and high precision, and it does not cause mercury pollution or discharge gas such as fluorescent lamps and does not cause environmental pollution. A response speed can be obtained, and it is a recent trend that it is gradually used as a substitute light source of a fluorescent lamp or a bulb.

For example, in spite of many advantages of LEDs, there are various displays such as a stock change display board, a subway electric display board, and display screens of various electric / electronic devices until recently due to the lack of diversity of colors and lower luminance compared to other lighting apparatuses It was mainly used in the area.

As the technology related to LED gradually develops through a lot of studies to improve the brightness of LED, a high-brightness and high-output LED has been developed, and a technology for applying LED to a lamp has been continuously studied.

Currently, lamps with high output power LEDs are being used in outdoor lighting as well as indoor lighting such as street lamps, security lamps, factories, floodlights, and the like.

In recent years, there have been many proposals for fluorescent lamp type intuitive-type LED lamps, which can reduce power consumption as a high luminance and can provide various color conversions and long life.

Accordingly, the interior lamps of each home or office, street lamps on the roads, and traffic signals are being replaced by intuitive LED lamps.

Such an intuitive LED lamp can be used in various types of products such as Korean Patent Laid-Open Nos. 10-2011-0071864, Korean Patent Laid-open No. 10-2010-0099942, Korean Patent No. 10-1165381, Korean Public Utility New 20-2010-0009413 Lt; / RTI >

In the case of existing products, the LED light source is applied directly to the illumination type, which causes a high discomfort glare. In order to reduce the discomfort glare, the light diffusion sheet of the translucent type is used.

That is, in the case of a light diffusion sheet, polycarbonate or the like is used to control the glare, but it is not a fundamental solution, and when a light diffusion polycarbonate is used, the light transmission loss is about 70% do.

In consideration of this point, Korean Patent Laid-Open Publication No. 10-2013-0136659 proposes a "reflection-lighted LED indirect lighting device".

However, the above-mentioned indirect illumination apparatus for the radiation-irradiated type LED has an advantage of being able to improve the discomfort glare through the indirect irradiation method, but still has insufficient in terms of securing the light efficiency.

Accordingly, the present invention has been made in view of the above points, and it is an object of the present invention to provide a novel indirect illumination type LED lighting system employing a reflective coating having high reflectance and a heat sink using Mg, The present invention aims to provide an LED lighting device which can improve the Klm / ₩ by reducing the light efficiency reduced by the conventional light diffusion sheet and the indirect illumination method which can reduce the weight of the product by applying the Mg heat sink.

In order to accomplish the above object, an LED lighting apparatus to which the indirect illumination method provided by the present invention is applied has the following features.

The LED lighting device using the indirect illumination method is an indirect lighting type indirect lighting type LED lighting device that reflects the light of the LED light source to a reflector so as to illuminate indoor or outdoor. The LED light source is an LED COB (Chip On Board) A plurality of LEDs are arranged at regular intervals along the longitudinal direction of the reflector 11 and at the widthwise end of the reflector 11 to which the LED light source belongs And a structure in which a reflective portion of a shape having a concave arc-shaped cross section facing the LED light source is formed.

Here, the reflective surface of the reflector may be coated with a reflective coating having a high reflectivity, and the LED light source may be inclined at an angle of 60 to 70 degrees toward the center of the reflective sheath with reference to a horizontal line.

A heat sink may be attached to the back surface of the LED light source, and the heat sink may be made of Mg.

In addition, when the LED light sources are located at both ends in the width direction of the reflector, the reflectors on both sides corresponding to the respective LED light sources can be partitioned by protrusions formed therebetween.

As a preferred embodiment of the present invention, the indirect illumination type LED lighting fixture of the present invention can be applied to indoor lighting for indoor lighting or street light for outdoor lighting.

The LED lighting apparatus to which the indirect illumination method provided by the present invention is applied can reduce the uncomfortable glare of the indoor user, reduce the light loss, realize a high efficiency lighting apparatus, reduce the manufacturing cost of the luminaire, It is effective.

1 is a cross-sectional view and a plan view showing an example in which an LED lamp according to the present invention is applied to an interior lamp;
2 is a cross-sectional view and a plan view showing another example in which an LED lamp according to the present invention is applied to an interior lamp
3 is a cross-sectional view and a plan view showing an example in which an LED lamp according to the present invention is applied as a street lamp
4 is a cross-sectional view and a plan view showing another example in which the LED lamp according to the present invention is applied as a street lamp
5 is a schematic view showing the characteristics of a reflective paint applied to an LED lamp according to the present invention
6 and 7 are schematic diagrams illustrating an embodiment of a reflector (reflector) in an LED luminaire according to the present invention

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

FIGS. 1 and 2 are a cross-sectional view and a plan view showing various examples in which an LED lamp according to the present invention is applied to an interior lamp, and FIGS. 3 and 4 are a cross-sectional view and a plan view showing various examples of application of the LED lamp according to the present invention to a street lamp.

As shown in FIGS. 1 to 4, the LED lighting fixture includes an LED lighting fixture of indirect illumination type which reflects the light of the LED light source 10 to the reflector 11 to illuminate indoor or outdoor, and a 250 W LED streetlight System is a LED lighting system using a reflective coating having high reflectance and a heat sink using Mg.

These LED luminaires can improve the Klm / ₩ by reducing the light efficiency reduced by the light diffuser sheet while eliminating the uncomfortable glare by applying the indirect irradiation method, and the lighting system capable of reducing the weight of the product by applying the Mg heat sink to be.

Here, the LED light source 10 is formed in the form of an LED COB (Chip On Board) package.

That is, the LED light source 10 includes a plurality of LED chips mounted on one metal pattern, and each LED chip is electrically connected to a metal pattern through connecting members, for example, LED COB Chip On Board) package.

In this case, it is preferable that the LED light source 10 is applied in the form of a parallel-connected LED COB (Chip On Board) package, and the inefficient part Can be excluded.

The LED light source 10 is positioned at one or both ends in the width direction of the reflection plate 11 with the LED element facing upward toward the reflection plate 11 and a plurality of LED light sources 10 are arranged along the longitudinal direction of the reflection plate 11 As shown in FIG.

The LED light source 10 is suitably supported on the housing 16 side or the reflector 11 side using a bracket or the like or directly supported on the housing 16 side or the reflector 11 side As shown in FIG.

Here, the installation structure of the LED light source and the installation structure of the reflection plate, which will be described later, are not particularly limited and may be adopted as long as the structure is commonly known in the art.

In the case of the LED light source 10, the LED light source 10 is installed in a posture inclined at a predetermined angle. For example, the LED light source 10 may be inclined at an angle of 30 to 150 °, Respectively.

At this time, the LED light source 10 having a predetermined inclination angle may be inclined inward (FIGS. 1 and 3) or inclined toward the outside (refer to FIG. 2 , Fig. 4).

Accordingly, the light emitted from the LED light source 10 can be irradiated to the front surface after being sufficiently reflected by the reflecting portion 12 in the reflection plate 11 (particularly, when the light is tilted toward the outside) As a result, a sufficient irradiation amount can be ensured due to the inclined posture of the LED light source 10.

Particularly, the present invention provides a reflection plate 11 having features such as a shape and a reflection paint that can realize high reflection efficiency.

The reflector 11 reflects the light emitted from the LED light source 10 and irradiates the light to the front side (downward). The reflector 11 is of an intuitive type (in the case of an interior lamp) A reflective portion 12 having a concave arc-shaped cross section facing the LED light source 10 is formed at the widthwise end of the reflection plate 11 on which the light source 10 is disposed.

The reflector 12 having such an arc-shaped sectional shape is formed at both ends of the reflector 11 when the LED light source 10 is positioned at both ends of the reflector 11, When the LED light source 10 is positioned at one end of the reflection plate 11, it is formed at one end of the reflection plate 11.

Accordingly, by using the reflector 12, it is possible to disperse the high-intensity LED light in various directions, thereby making it possible to ensure comfortable eyes and high degree of high degree of bacteria.

In the case where the LED light sources 10 are positioned at both ends in the width direction of the reflector 11 and the reflector 12 is formed at both ends of the reflector 11 in correspondence thereto, A protrusion 15 protruding from the front surface (light-irradiated side) is formed between the protrusions 15 and the reflective portions 12 on both sides can be defined by the protrusions 15 formed as described above.

Accordingly, each of the lights reflected from both the reflective portions 12 can be reflected by the protruding portion 15 without being interfered with each other, and can be totally guided to the front surface.

Here, the protrusion 15 may be formed in a wedge shape having a sharp end or a gently bent shape.

An embodiment of the reflection plate 11 to which the reflection unit 12 is applied will be described in more detail as follows.

As shown in FIGS. 6 and 7, by setting the optimum inclination range by dividing the entire reflective portion into six sections in the vertical and horizontal directions, the light efficiency of the light source can be maximized and the offensive clair can be reduced.

To this end, the reflection plate 11 reflects light emitted from an LED light source (not shown) and irradiates the light toward the front (lower)

The reflective plate 11 is formed with a reflective portion 12 having a concave arc-shaped cross section formed by projections 15 on both sides thereof.

The reflector 12 is divided into six sections A, B, C, D, E and F in the longitudinal direction and six sections A ', B', C ', D' And each section is connected to a straight line, the angle of the reflection part (reflection surface) is bent at the boundary point between the section and the section, and the boundary point can be connected to the straight line.

In other words, the reflection angle can be bent at six boundary points A (F '), B (E'), C (D '), D (C'), E (B ' And each boundary point is connected to a straight line.

Particularly, when the reflector 12 is divided into six sections A, B, C, D, E and F in the longitudinal direction (vertical direction in the drawing) The height of the reflector can be set to a length of 2 to 3 cm, B to 5 to 6 cm, C to 6 to 7 cm, D to 5 to 6 cm, E to 3 to 4 cm, and F to 1 to 3 cm.

The reflector 12 is divided into six sections A ', B', C ', D', E 'and F' in the lateral direction , A 'is 0.1 to 1 cm, B' is 0.5 to 1.5 cm, C 'is 1 to 2 cm, D' is 3 to 5 cm, for example, when the transverse length corresponding to 1/2 of the entire transverse length of the reflector is 12.5 cm. (The length corresponding to 1/2 of the total length) of the reflector can be set to a length of 4 cm, E 'of 7 to 8 cm, and F' of 12.5 cm.

Particularly, in order to obtain a high reflection efficiency, a reflective coating 13 having a high reflectance is applied to the reflective surface of the reflection plate 11 (the entire reflective surface including the reflective portion).

As shown in FIG. 5, the reflective coating 13 is a coating of a nano-sized air layer 17, and may have a reflectance different from that of the incident angle. However, at least 20% .

Accordingly, in the case of the reflective surface on which the reflective paint 13 is formed, the reflectance is 90 to 95%, which is similar to that of the conventional metal reflector. However, in the case of the metal reflective reflector, a large disadvantage is a mirror- The reflection efficiency is higher than the reflectance of 85%.

Generally, LED is a semiconductor device that generates about 80% of heat according to input power and about 20% of light is converted into light. Heat dissipation is very important technology in this semiconductor device. .

Therefore, in order to ensure long life, one of the great advantages of LED, it is necessary to apply a heat sink with excellent performance.

However, metal is generally used as the heat sink, and the weight of the heat sink is accordingly a weight of the total weight of the product.

In this case, the heat sink 14 is made of a Mg material, and at the same time, the heat sink 14 is provided on the rear surface of the LED light source 10, As shown in FIG.

The Mg-based heat sink has a specific gravity lower than that of currently used Al material and is suitable for light weight, and has advantages of excellent heat dissipation effect, vibration absorbing rate, excellent heat distortion rate, and is suitable as a material of a heat sink for LED lighting.

As can be seen in Table 1 below, the Mg material heatsink is 35% less in weight than the Al heat sink when using an intuitive LED luminaire, and is suitable for heat dissipation of the light source module of an intuitive LED lamp because of its excellent thermal conductivity. .

In other words, as shown in Table 1 above, in the case of a heat sink to which Mg is applied, the light weight can be reduced by 30% or more compared with the conventional Al heat sink and the heat radiation effect can be improved by 2 to 3 ° C (5 ° C effect at 100 ° C).

Therefore, according to the present invention, the following technological effects can be expected.

① We can secure high-efficiency reflector (reflex glow) manufacturing technology using high-reflection paint.

- Since the light diffusing sheet is not used, it is possible to reduce the light loss and finally produce a highly efficient lighting device.

- The weight of the product can be effectively reduced through the production of the luminaire using the lightweight material without the metal reflector.

- In the case of reflective paint, it can be applied to plastic type or wall surface to improve reflection efficiency on various types of lighting equipment and improve indoor illumination.

- It is possible to reduce the discomfort due to the direct use environment in case of indoors by damping the offensive glare not by the light diffusing sheet but by the reflection plate type and reflection paint. In the case of streetlight, it can reduce the influence on the driver and secure the safety.

(2) It is possible to secure a high heat dissipation light weight heat sink manufacturing technology using Mg.

- It is possible to lighten various lighting products by developing Mg heat sink.

- It is possible to reduce the weight by up to 35% compared to the aluminum heat sink.

-Mg Extrusion productivity can be ensured, and excellent heat sink manufacturing technology can be secured.

③ It is possible to acquire uncomfortable glare-damped straight tube LED lighting equipment using indirect irradiation method.

-120lm / W, color rendering of 80, and weight of 5kg or less, it is possible to reduce the uncomfortable glare of indoor users.

- Reduction of cost due to reduction of manufacturing materials of luminaire by indirect inspection method has a substitution effect of low price and low price product.

- It is possible to develop eco-friendly indoor lighting equipment by applying existing metal materials and other lightweight materials.

- It is possible to extend the life of the light source by improving the heat dissipation effect (42,000 hours extension per 10 ℃).

④ Obsolete Glare attenuation applying indirect lighting method It can secure 250W class LED street lamp manufacturing technology.

- 80lm / W, average illumination of 30lux @ 10m, and Glair Ti 10% streetlight, which can secure the driver's view visually.

- Light weight of luminaire can be reduced by applying lightweight material.

- It is possible to extend the life of the light source by improving the heat dissipation effect (42,000 hours extension per 10 ℃).

Further, according to the present invention, the following economical effects can be expected.

- By eliminating the use of secondary optical sheets due to the use of high reflective coatings, it is possible to replace low-priced foreign LED module imports by reducing costs.

- It is possible to contribute to green industrialization by suppressing CO ₂ emission by power saving by achieving high efficiency by excluding the use of light diffusion polycarbonate.

- The substitution effect of traditional lighting can reduce environmental pollutants generated during waste disposal.

- In response to the government's energy efficiency policy, it is possible to generate a lot of alternative demand and contribute to sales growth and job creation in the new LED lighting sector.

When the LED lighting device of the present invention is applied to an intact LED indoor light and 250W LED street light, it is possible to attenuate unpleasant glare by indirect irradiation, increase the light efficiency by excluding the use of polycarbonate, It is possible to secure price competitiveness.

In addition, by using a heat sink to which Mg is applied, weight reduction of 10% or more compared to the reference product can be achieved.

In the case of a product to which the technology of the present invention is applied, it can be used in a variety of applications such as a house, an apartment, an office, a public office, a school, a factory, Outdoor lighting, billboards, automobile interior lamps, ship cabin, airplane cabin, etc.

10: LED light source
11: Reflector
12:
13: Reflective paint
14: Heatsink
15:
16: Housing
17: air layer

Claims (9)

An indirectly illuminated LED lighting fixture for illuminating the inside or outside of a room by reflecting the light of the LED light source (10) with the reflection plate (11)
The LED light source 10 is formed in the form of an LED COB (Chip On Board) package. The LED element is positioned at one or both ends of the reflective plate 11 in the width direction with the LED element facing upward toward the reflective plate 11, 11) are arranged at regular intervals along the longitudinal direction of the reflector 11 and the reflector 11 at the widthwise end of the reflector 11 to which the LED light source 10 belongs has a concave arc- And a reflection part (12) of the shape of the LED is formed.
The method according to claim 1,
Characterized in that a reflection coating (13) having a high reflectance is applied to the reflection surface of the reflection plate (11).
The method according to claim 1,
Wherein the LED light source (10) is inclined at an angle of 30 to 150 degrees toward the center of the width of the reflector with respect to a horizontal line.
The method according to claim 1 or 3,
Wherein the heat sink (14) is attached to the back surface of the LED light source (10), and the heat sink (14) is made of Mg material.
The method according to claim 1,
When the LED light sources 10 are positioned at both ends in the width direction of the reflector 11, the reflectors 12 on both sides corresponding to the LED light sources 10 are divided by the protrusions 15 formed therebetween, The LED lighting fixture adopts the indirect lighting method which is characterized by that it can be made.
The method according to claim 1,
Wherein the indirect illumination type LED lighting fixture can be applied to indoor lighting for indoor illumination or street light for outdoor illumination.
An indirectly illuminated LED lighting fixture for illuminating the inside or outside of a room by reflecting the light of the LED light source (10) with the reflection plate (11)
The LED light source 10 is formed in the form of an LED COB (Chip On Board) package. The LED element is positioned at one or both ends of the reflective plate 11 in the width direction with the LED element facing upward toward the reflective plate 11, 11 are arranged at regular intervals along the longitudinal direction of the LED light source 10 and the LED light source 10 faces the LED light source 10 at the widthwise end of the reflection plate 11 and is divided by the projecting portion 15 And a reflective portion 12 having a concave arc-shaped cross section is formed,
The reflector 12 is divided into six sections A, B, C, D, E and F and six sections A ', B', C ', D', E 'and F' And the angle of the reflection part (reflection surface) can be bent at a boundary point between the section and the section as each section is connected to a straight line.
The method of claim 7,
The reflector 12 is divided into six sections A, B, C, D, E and F in the longitudinal direction. When the vertical height of the reflecting section 12 is 7 cm, A is 2 to 3 cm, The height of the reflector can be set to a length of 6 cm, 6 to 7 cm, D is 5 to 6 cm, E is 3 to 4 cm, and F is 1 to 3 cm. Luminaire.
The method of claim 7,
The reflector 12 is divided into six sections of A ', B', C ', D', E 'and F' in the transverse direction. When the transverse length of the reflector 12 is 12.5 cm, A ' The length of the reflector is set at a ratio of length of 0.1 to 1 cm, B 'of 0.5 to 1.5 cm, C' of 1 to 2 cm, D 'of 3 to 4 cm, E' of 7 to 8 cm and F 'of 12.5 cm LED illumination device adopting the indirect illumination method which is characterized by being made to be able to be illuminated.

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