KR20100112104A - Led lighting with broad and uniform light distribution - Google Patents

Abstract

PURPOSE: An LED illumination having the distribution of light wide and uniform applies to the lamp installed at existing the LED module is embodied detachably. CONSTITUTION: A plurality of LEDs(230) emitting the light is mounted in the PCB(220). The light-transmitting part(240) diffuses the light coming out in LED the different main part distribution of light. The light-transmitting part comprises the base plane and the diffuse sheet formed into the polymer material or the glass.

Description

LED lighting with broad and uniform light distribution

The present invention relates to LED lighting, and more particularly to LED lighting having a wide and uniform light distribution.

LED (Light Emitting Diode) illumination is an illumination device using LED which emits light having a predetermined wavelength by supply of electricity. At present, LEDs have been used for signs of advertising, indoor and outdoor interiors, etc. in place of conventional lightings as their light emission lifespan increases. In particular, a lot of LED lighting devices have been developed to replace the fluorescent lamps are widely used as indoor lighting. However, currently developed LED lighting devices still do not show suitable light distribution characteristics as lighting.

1A shows a preferred light distribution curve that can be utilized in a lighting device. The light distribution curve is a curve representing the intensity of light in a plane including a light source as a function of direction, and is usually represented using a polar coordinate system with the light source as the origin, and well reveals the characteristics of the lighting device. In the case of an open fluorescent lamp, a wide and uniform good light distribution is achieved as shown in FIG. 1A.

FIG. 1B is a view showing a perspective view and a light path emitted of a flat panel LED light according to the prior art, and FIG. 1C is a view showing a light distribution curve of the LED light shown in FIG. 1B.

The LED light 1 is accommodated in the back box 5 and the printed circuit board (PCB) 2 on which the LED 3 is mounted, and the light emitting part 4 diffused through the light emitted from the LED 3. Include.

In FIG. 1B, the length of the arrow indicating the direction of light emitted from the LED 3 as a light source is shown corresponding to the intensity of the light emitted from the LED 3. Light from the LED 3 is emitted radially. The light L1 in the downward direction is the strongest and the light L2 near the side or near the light box 5 is due to the beam angle from the LED 3 and the area occupied by the light box 5. The light emitting area of (3) is limited and its intensity is relatively weak.

In general, when analyzing light distribution of the LED (3) as a light source, the illuminance of the irradiation surface is determined according to the distance between the light source and the irradiation surface, the illuminance of the irradiation surface is reduced in proportion to the square of the distance. Therefore, when considering the plane spaced apart from the light source, the point located in the waterline from the light source and the other point is different from the light source, so the illuminance is different.

As shown in FIG. 1C, the light distribution of the general LED light 1 has a high luminous intensity based on 0 degree and the illumination intensity of the irradiated light varies according to the angle of divergence because the distance from the light source is large depending on the divergence angle. The illuminance of the irradiated surface becomes uneven. That is, the light emitted from the LED light 1 has a light distribution in the form of a sphere while having the largest luminous intensity in the vertical direction with respect to the LED 3 as a whole.

In addition, the conventional flat panel LED light (1) is a PCB 2 is implemented in a plane, the LED 3 mounted thereon also emits light in a state arranged horizontally along the surface of the PCB (2). Therefore, in the conventional LED lighting, even if the output light passes through the light-transmitting part 4 including the diffusing member, the overall light distribution has the highest luminance in the vertical direction with respect to the flat panel LED lighting 1 as described above. There is a problem with form.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

The present invention is to provide an LED light having a wide and uniform light distribution so as to uniformly irradiate a large area.

In addition, the present invention is to provide a LED light having a wide and uniform light distribution that can be easily and inexpensively used in the conventional facility because it is detachable to a conventional back box in a room such as home, office.

Technical problems other than the present invention will be easily understood through the following description.

The principle of the present invention is to make the light distribution wide and uniform by forming a predetermined angle on the light-transmitting part by using the property that the average emission direction of the diffused light spreading through the light-transmitting part in the flat panel LED light is directed toward the normal direction of the light-emitting surface. In order to further reinforce this, the angle of the PCB on which the LED is mounted in the light emitting surface direction is adjusted.

According to an aspect of the present invention, a plurality of LEDs for emitting light are mounted, the surface of the PCB is mounted opposite to the surface on which the LED is mounted, and a predetermined angle is formed so that the light emitted from the LED corresponds to each other at a predetermined angle. There is provided an LED light having a wide and uniform light distribution including a flat type light transmitting part which diffuses in another main light distribution direction, a PCB support part supporting a PCB, and a power supply means for supplying power to the LED.

Angles of the side surfaces of the cross section of the light transmitting part are formed at 45 degrees to 175 degrees, and the PCB may have a predetermined angle so that the LEDs emit light in different directions.

Here, the plurality of LEDs mounted on different surfaces of the PCB are arranged in a zigzag form with each other, the PCB support portion is formed with a predetermined angle parallel to the PCB, the power supply means is located in the groove formed by bending the PCB support portion. The smaller angle of the angle formed by the PCB may be 45 degrees to 180 degrees.

In addition, the PCB support may be formed with a plurality of surfaces to which different PCBs are coupled, or the cross section of the PCB support may be an arc to which different PCBs are coupled to both sides, or the PCB support may be accommodated in the transmissive portion and may be disposed in one direction. It may include a first support arm protruding to receive the PCB and a second support arm accommodated in the light transmitting portion, protruding in another direction to support the PCB.

In addition, one surface of the light transmitting portion may be an arc, or the coupling portion between the side surfaces of the light emitting portion may be an arc shape, or the side surface of the light emitting portion may have an arc shape having a concave direction facing the PCB, and the cross section of the light transmitting portion may have a triangular or trapezoidal shape. And polygons, including rectangles and pentagons.

In addition, the LED includes a blue spectrum, and the light-transmitting part includes a phosphor for controlling the color temperature by converting the wavelength of the light of the LED, and when the PCB includes three or more sides, the luminance of the LED mounted on the PCB in both directions is both sides. It may be greater than the brightness of the LED mounted on the PCB in all directions located between the PCB in the direction.

The light transmitting part may be formed of a polymer material or glass, and at least one surface of one side and the other surface of the light transmitting part may have roughness or the light transmitting part may further include a diffusion member for diffusing the LED light.

In addition, the light transmitting part may further include one or more diffusion sheets or prism sheets coupled to one or more of one surface and the other surface, or any one or more surfaces of the light transmitting part and the other surface may have a pattern for inducing diffusion of LED light. .

In addition, the light-transmitting portion may be formed of a polymer material or glass, and may include one or more diffusion sheets, one or more of which is bonded to one or more of one or the other surface of the base surface and the embossed base surface. have.

Here, the transmittance of the light transmission unit may be 30% to 88%, the haze of the light transmission unit may be 42% to 99.8%, the distance between adjacent LEDs of the plurality of LEDs may be 1mm to 125mm.

In addition, the length of one side of the LED may be 2mm to 9mm or the length of the diameter of the LED may be 2mm to 25mm.

According to another aspect of the present invention, a plurality of LEDs emitting light having a predetermined wavelength is a PCB mounted on one surface, a PCB support for supporting the PCB and detachably coupled to the housing for housing the PCB, the light emitted from the LED An LED lighting having a wide and uniform light distribution is provided which opposes the surface on which the LED of the PCB is mounted so as to transmit, and includes a flat light transmitting portion and a power supply means for supplying power to the LED.

Here, the PCB support may be coupled by a fastening portion that can be fastened to the housing, and the PCB may have a predetermined angle so that the LEDs emit light in different directions.

In addition, the present embodiment may further include a skin portion coupled to the edge of the housing so as to be exposed to the PCB support portion and the light transmitting portion, and the skin portion and the light transmitting portion may be integrally formed to be detachably coupled to the housing.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

LED lighting according to the present invention is to overcome the disadvantages of the distorted circular light distribution of the conventional flat panel LED lighting between the PCBs when the LED is mounted on the attachment surface of the luminaire or mounted with other forms of fixture A predetermined angle can be formed, and when the PCB is placed in the luminaire in this manner and the lighting is turned on, the light distribution shape of the luminaire can be wide and form uniform illuminance, and the end face of the light transmitting part is wider so as to face the PCB. There is an effect of forming uniform light distribution.

In addition, the LED lighting according to the present invention has an effect that can easily replace the LED module by easily detachable to the conventionally installed luminaire by implementing a removable LED module.

1A shows a preferred light distribution curve available in an illumination device.
1b shows a perspective view of the LED light and the emitted light path.
1C is a view showing a light distribution curve of the LED light shown in FIG. 1B.
2A is a cross-sectional view of an LED light having a wide and uniform light distribution in accordance with an embodiment of the present invention.
FIG. 2B shows a light distribution curve of the LED light shown in FIG. 2A. FIG.
3A is a cross-sectional view of an LED light having a wide and uniform light distribution according to another embodiment of the present invention.
3B is a plan view of an LED light having a wide and uniform light distribution according to another embodiment of the present invention.
4 is a cross-sectional view of an LED light having a wide and uniform light distribution according to another embodiment of the present invention.
5 is a cross-sectional view of an LED light having a wide and uniform light distribution according to another embodiment of the present invention.
Figure 6a is a view showing the appearance of the LED on the PCB used in the LED lighting according to an embodiment of the present invention.
6B illustrates various forms of LED lighting according to an embodiment of the present invention.
7 to 9 are cross-sectional views of LED lighting having a wide and uniform light distribution according to another embodiment of the present invention.
10 to 12 are schematic cross-sectional views of LED lighting having a wide and uniform light distribution according to another embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

In addition, in the description with reference to the accompanying drawings, the same components regardless of reference numerals will be given the same reference numerals and duplicate description thereof will be omitted. In the following description of the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

FIG. 2A is a cross-sectional view of an LED light having a wide and uniform light distribution according to an embodiment of the present invention, and FIG. 2B is a view showing a light distribution curve of the LED light shown in FIG. 2A. Referring to FIG. 2A, a PCB support 210, a light projector holder 213, a PCB 220, an LED 230, a light projector 240, and a power supply unit 260 are illustrated.

The present embodiment is characterized in that any one or more of the PCB 220 and the light-transmitting unit 240 is bent to form a flat LED lighting. LED lighting according to the present embodiment is attached to bend, or bent so as to form a predetermined angle the PCB 220 provided therein or a light transmitting part 240 for transmitting light provided in place of a conventional fluorescent box, incandescent lamp, etc. Or bends there is a feature that can have a wide and uniform light distribution. That is, in the LED lighting according to the present embodiment, the PCB 220 and / or the light emitting part 240 maintain the predetermined angle so that the LED 230 has a wide light distribution by irradiating different directions.

Here, the flat lighting refers to a light having a generally flat shape, such as a flat plate. For example, the flat light may be a light in which the back box is formed in a flat shape, such as a light used for indoor lighting of a home.

The PCB supporter 210 is a frame supporting the PCB 220, and each surface on which the PCB 220 is provided to support the PCB 220 at a predetermined angle may form the predetermined angle described above. The PCB 220 may be coupled to the PCB support 210 using a predetermined fastening part, and the fastening part may include, for example, a screw, a clip, an adhesive (including a heat radiation adhesive), a spring, an adhesive pad, and the like.

The PCB 220 may include a plurality of PCBs individually coupled to each side of the PCB support 210 or may be one PCB bent corresponding to the surface of the PCB support 210. The following description will focus on the former case. In addition, the PCB 220 applied to the present embodiment may be rigid or flexible.

Here, the angle formed by the PCB 220 may be 45 degrees to 175 degrees. That is, a small angle (for example, an angle between the rear surfaces of the surface on which the LED 230 is mounted) among the angles formed by the plurality of PCB 220 surfaces meeting each other may be 45 degrees to 175 degrees. Light emitted from the LED 230 by the angle formed between the surface of the PCB 220 is irradiated to the side of the LED light can form a wide and uniform light distribution.

When the angle formed by the PCB 220 is 180 degrees, the PCB 220 may be flat, and in this case, light distribution may be broadly formed by an angle formed by the light transmitting part 240. That is, the present embodiment includes a structure in which the PCB 220 is flat and the light transmitting part 240 is bent as described below.

The light transmitting part 240 may be formed in a flat plate shape and may be bent to face each surface of the PCB 220. The light emitter 240 may include a diffusion member that diffuses light because the light emitted from the LED 230 passes through the light and is irradiated to the outside. The diffusing member may be a light diffusive bead, and the light transmitting part 240 may be a plastic (polymer material) to which the light diffusing beads are added, for example, polyethylene (PE), polypropylene (polypropylene, PP), polystyrene (PS), polyethylene terephthalate (PET), polyester (PES), polycarbonate (PC), polymethyl methacrylate (PMMA), styrene acrylic It may be formed of styrene-acrylonitrile copolymer (SAN) or the like or may be formed of glass.

One surface and / or the other surface of the light transmitting part 240 may have roughness. That is, any one or more of one surface and the other surface of the light transmitting unit 240 has a haze treatment, so that the light transmitting unit 240 may perform a diffusion function. In this case, the light transmitting part 240 may be haze treated in a state including or not including the aforementioned diffusion member.

In addition, one surface and / or the other surface of the light transmitting part 240 may be combined with the diffusion sheet. The diffusion sheet is a functional sheet that allows the light emitted from the LED 230 to diffuse evenly and to propagate toward a direction perpendicular to the plane. The number of diffusion sheets coupled to the light transmitting part 240 is not limited, and may be, for example, about 1 to 3 sheets. The diffusion sheet may be bonded to both sides of the above-described plastic or glass, which is a main component of the light transmitting part 240, in a sandwich form. Here, the diffusion sheet is a sheet having a thickness of several tens to several hundreds of micrometers, and the diffusion member is included in the outer surface or inside. According to the present exemplary embodiment, when the plurality of diffusion sheets are included in the light transmitting part 240, a wide and uniform light distribution may be realized as described above.

In this case, the light transmitting part 240 is formed of a polymer material or glass as described above, and any one or more of one surface and the other surface is coupled to any one or more of one surface and the other surface of the base surface embossed, and the base surface One or more diffusion sheets may be included.

In addition, the light transmitting part 240 may be formed as a diffusion plate including a diffusion member therein. The diffuser plate may be milky white, have a thickness of several mm to several tens of mm, and include the above-described diffusion member therein. The thickness of the diffusion plate according to the present embodiment may be, for example, 0.5 to 15mm.

Also, the transmittance of the light transmitting part 240 according to the present embodiment may be 30% to 88%, and the haze may be 42% to 99.8%. Within this numerical range, the present embodiment is characterized in that the intensity of the side light is increased, so that the light distribution is wide and uniform.

In addition, the above-mentioned diffusion member may be formed of an oxide-based or may be formed of a foamed diffusion structure including a microcell in a foamed form. Here, in the case of the former, an oxide-based material used as the diffusion member may be, for example, Si powder, TiO, TiO ₂ , SiO, SiO ₂ , ZnOk, ZrO _2, or the like. In addition, in the latter case, the diffusion member is not composed of a separate organic or inorganic diffusion agent, and the light transmitting part 240 itself is implemented as a continuous and irregular foamed microcell, and passes through the light transmitting part 240 by the micro cell. Light is diffused.

In addition, one surface and / or the other surface of the light transmitting part 240 may be combined with the prism sheet. The prism sheet is a sheet that serves to collect scattered light to travel in a specific direction. The number of prism sheets is not particularly limited either.

In addition, one surface and / or the other surface of the light transmitting part 240 may be formed with a pattern for inducing diffusion of the LED 230 light. The pattern may be formed regularly. For example, a checkered pattern in which a plurality of quadrangles are arranged may be formed in the light transmitting part 240 to induce light diffusion.

The side surface of the cross section of the light transmitting part 240 may be formed to face the PCB 220. That is, since the side surface of the cross section of the light-transmitting part 240 is a surface in which light emitted from the PCB 220 is vertically incident, there is an effect that the side light distribution can be counted when this surface is formed to face the PCB 220. . The side surface of the cross section of the light transmitting part 240 facing the PCB 220 may be flat or curved. Here, it means that formed to face oppositely means that formed substantially parallel, including the case that mathematically strictly parallel.

The cross section of the light emitting unit 240 may have various shapes such as a V-shape having one piece and a W-shape having two pieces and one valley according to the number of bendings. Further, the shape may be U-shaped or the like depending on whether the rounded edge is processed at the bent portion. Further, the shape may be a V-shaped repeating type (including a W shape) in which the V shape is repeated, or a U-shaped repeating type in which the U shape is repeated.

In addition, the light transmitting part 240 may be formed of a single integral member bent or may be formed of a coupling structure of different members. For example, in the former case, the light transmitting part 240 may be formed by bending one flat member connected to each other. In the latter case, the light transmitting part 240 may be formed by coupling a plurality of different planar members to each other.

Referring to FIG. 2A, the light transmitting part 240 is coupled to and fixed to the light transmitting part holder 213 coupled to the PCB support 210. The side surface of the cross section of the light transmitting part 240 may be V-shaped. The light transmissive part 240 forms the predetermined angle (theta) ₁ in the side surface of the cross section. Sides of the cross section of the light-transmitting part 240 are respectively opposed to the PCB 220, the angle θ ₁ between the sides may be 45 to 175 degrees.

The PCB support part 210 may be formed in a flat shape including a predetermined angle so that the PCB 220 forms a predetermined angle.

In addition, the light transmitting unit 240 may include a fluorescent material for adjusting the color of the LED light. That is, the light emitter 240 converts a corresponding color when the LED 230 includes a blue spectrum, so as to realize white light or change a color temperature, for example, any one of red, green, and yellow phosphors. It may contain the above. The above phosphors may convert the wavelength of light emitted from the LED 230 to change its color temperature and also realize white light.

Here, the interval that is the separation distance between the LED 230 and the light emitter 240 may be 5mm to 175mm. When the separation distance is smaller than the interval range, the LED 230 may be displayed externally as a point light source, and when the separation distance is larger than the interval range, the entire lighting fixture is large.

In addition, the distance between the adjacent LEDs 230 in the plurality of LEDs 230 may be 1mm to 125mm. Here, the distance between adjacent LEDs 230 may be the distance between the centers of the LEDs 230 or the ends of the LEDs 230. When the LED 230 is rectangular, the length of one side thereof, that is, the horizontal length and the vertical length may be 2 mm to 9 mm, respectively. In addition, when the LED 230 is circular, the diameter or the length of the long axis in the case of an ellipse may be 2 mm to 25 mm. Here, the length and diameter of the LED 230 may be measured except for the lead frame. When the LED 230 has the same size and maintains the above-mentioned distance, the LED 230 is not displayed as a point light source and emits uniform light to the outside corresponding to the transmittance and haze of the light-transmitting part 240 described above. There is an advantage to this.

In addition, the present embodiment may further include a heat dissipation unit (not shown). The heat dissipation unit may be coupled to the PCB support unit 210 and / or the light transmitting unit 240 to receive heat generated by the LED 230 and to radiate it to the outside. To this end, the heat dissipation unit may be implemented in various heat dissipation structures, including a plurality of heat dissipation fins. For example, the cross section of the heat dissipation unit may be a curved line, a straight line, or a shape in which these are mixed.

The heat dissipation part may be integrally formed with the PCB support part 210 or may be separately provided. In the latter case, the heat dissipation part may be coupled to the PCB support part 210 and the light transmitting part 240 by a predetermined fastening method, for example, screwing.

A power supply unit (including a PSU (Power Supply Unit, PSU board and PSU parts)) 260 is a component for supplying current to the LED 230 and converts an external alternating current into a DC current to the LED 230. It may include an AC-DC converter for supplying a direct current. The position of the power supply means 260 may be implemented in various ways. For example, the power supply means 260 is located in a space (groove) formed by bending the PCB support portion 210, thereby improving space utilization and heat dissipation. I can do it efficiently. In this case, the power supply means 260 may be a device that is integrally formed with or separate from the PCB 220.

The LED light having the above-described structure has a light distribution curve shown in FIG. 2B. Referring to FIG. 2B in comparison with FIG. 1C, since the light distribution curve has a shape spreading laterally, a wide and uniform light distribution curve is realized. The light distribution curve according to the present embodiment is widely distributed due to the intensity of the LED 230 light toward the side of the main light distribution direction. In addition, the light in the lateral direction is distributed above the central horizontal line, when the LED lighting of the present embodiment is installed on the indoor ceiling emits light on the ceiling also has the effect of indirect lighting.

3A is a cross-sectional view of an LED light having a wide and uniform light distribution according to an embodiment of the present invention, and FIG. 3B is a plan view of the LED light shown in FIG. 3A. Referring to FIGS. 3A and 3B, the PCB support part 210, the locking step 215, the PCB 220, the reflector 225, the fastening part 227, the LED 230, the light transmitting part 240, and the power supply are provided. Means 260 are shown.

Referring to FIG. 3A, both ends of the PCB support part 210 may protrude and be easily installed as shown. For example, such a protrusion may be caught on the ceiling so that the illumination of the present embodiment can be installed on the ceiling.

In addition, the present embodiment may further include a reflecting plate 225 coupled to the PCB 220. That is, the reflective plate 225 prevents light emitted from the LED 230 from entering the PCB 220 and is coated with a reflective material. The reflector plate 225 may be supported by the locking projection 215 protruding from the PCB supporter 210 to be coupled to the PCB supporter 210. In addition, the PCB support part 210, the PCB 220, and the reflector plate 225 may be fastened to each other by the fastening part 227. For example, the fastening portion 227 may be a bolt.

4 and 5 are cross-sectional views of LED lighting having a wide and uniform light distribution according to another embodiment of the present invention. 4 and 5, the housing 405, the PCB support part 410, the skin part 415, the PCB 420, the fastening part 427, the LED 430, the light transmitting part 440, and the power supply. Means 460 are shown. The differences from the above will be explained mainly.

The present embodiments are characterized in that the housing 405 can be detachably coupled with the PCB support 410, the PCB 420, the LED 430, and the light emitting unit 440. That is, according to the present embodiment, the LED module is detachably coupled to the housing 405 which is conventionally used as a luminaire such as a fluorescent lamp or an incandescent lamp.

Referring to FIG. 4, the PCB 420 and the light projector 440 are bent to face each other. The PCB 420 is fixedly coupled to the PCB support 410, and the light transmitting part 440 is fixedly coupled to the skin 415. The skin unit 415 may have a material, a shape, and the like, coupled to an edge of the housing 405 to cause aesthetics. The PCB support part 410 and the skin part 415 may be different members or integrally formed.

The PCB support 410 is coupled to the housing 405 by fastenings 427, such as screws, as described above. Since the fastening part 427 is easily operated, the user may take action by detaching the PCB support part 410 from the housing 405 when the LED 430 reaches the end of life or requires a separate repair.

The housing 405 may be conventionally installed or newly installed. For example, according to the user's selection, only the LED module according to the present embodiment may be installed in the housing 405 of the lighting that is conventionally installed on the ceiling, or the entire lighting including the housing 405 may be replaced.

Here, the PCB support part 410, the skin part 415, the PCB 420, and the light transmitting part 440 may be integrally formed. That is, the PCB support part 410, the skin part 415, the PCB 420, and the light emitting part 440 may be assembled in a separated state from each other, but may be fastened to the housing 405 in an integrally formed state. In addition, the PCB support 410 may function as a skin of the lighting as a portion exposed to the outside, in this case, the PCB support 410 may be formed of a material having a variety of colors, textures.

Referring to FIG. 5, while the PCB supporter 410 is coupled to the housing 405 by the fastening part 427, the PCB 420 and the light transmitting part 440 may be formed flat without being bent. That is, the present embodiment is characterized in that the PCB support 410, the unbent PCB 420, the LED 430, and the unbent floodlight 440 may be detachably coupled to the housing 405.

In addition, referring to FIG. 6A, a plurality of LEDs 230 are mounted on one surface of the PCB 220 in a line (see FIG. 6A (A)) or two or more rows (see FIG. 6A (B)). . When mounted in two or more rows, they may be arranged in parallel or zigzag.

In addition, according to another embodiment, when the PCB 420 is bent and formed as described above, the plurality of LEDs 230 mounted on each side are arranged in a zigzag form with respect to the LEDs 230 mounted on the other side. Can be. For example, when the PCB 420 is bent to include adjacent first and second surfaces, a plurality of LEDs 230 are mounted in a line on the first surface, and FIG. 6A (B) on the second surface. As described above, a plurality of LEDs 230 arranged in a zigzag form may be mounted on the LEDs 230 of the first surface. Here, the LEDs 230 arranged in a zigzag form may be a set including one or a plurality of LEDs 230. In the latter case, a plurality of LEDs 230 having ten or less may form a set, and different sets may be arranged in a zigzag form. According to this embodiment, since the plurality of LEDs 230 are arranged in a zigzag form, there is an advantage that can be uniformly irradiated to the outside as a whole.

In addition, referring to FIG. 6B, the illumination according to the present embodiment may have a structure having a wide and uniform light distribution in four directions or a circle (including an ellipse) as well as left and right directions. That is, the bent shape of the PCB 220 and / or the light transmitting part 240 may be formed in four directions or a circle as well as left and right. (A) is a structure in which light is diffused in both directions, (B) is a structure in which light is diffused in a circular shape, and (C) is a structure in which light is diffused in four directions.

When the plane of illumination according to the present embodiment is a circular (B), the PCB 220 and / or the light emitting part 240 may be bent in a direction from the center toward the circumference. In addition, when the plane of the illumination according to the present embodiment is a quadrilateral (C), the PCB 220 and / or the light emitting part 240 may be bent in a direction from the center toward each side.

In the above description, a cross-sectional view of an LED light having a wide and uniform light distribution has been described generally. Hereinafter, a LED light having a wide and uniform light distribution according to the present invention will be described with reference to specific embodiments with reference to the accompanying drawings. do. Examples will be described below in turn, and it is obvious that the present invention is not limited to these examples.

7 to 9 are cross-sectional views of LED lighting according to another embodiment of the present invention. 7 to 9, the PCB supporter 210 is formed with a plurality of surfaces to which different PCBs 220 are coupled, or the cross section of the PCB supporter 210 is coupled to both sides with different PCBs 220. Various embodiments are presented, such as having an arc shape. The dotted line represents the light distribution curve. Hereinafter, for convenience of description, the arrangement and structure of the PCB support part 210, the PCB 220, the LED 230, and the light emitter 240 accommodated in the light emitter 240 will be described.

Referring to FIG. 7A, the first PCB support part 210a and the second PCB support part 210b form the aforementioned angles and are coupled to each other. The LED 230 mounted on the PCB 220 coupled to the first PCB support 210a and the second PCB support 210b, respectively, is inclined by the angle so as to irradiate light to both sides of the LED 230 according to the present embodiment. Light distribution of light forms a wide distribution.

Referring to FIG. 7B, the first PCB support 210a, the third PCB support 210c, and the second PCB support 210b are sequentially connected to each other. The PCB 220 and the LED 230 may be coupled to the first PCB support 210a and the second PCB support 210b to irradiate light more strongly to both sides. In addition, the PCB 220 and the LED 230 may be coupled to the third PCB support part 210c. In this case, the luminance of the LED 230 coupled to the first PCB support 210a, the third PCB support 210c and the second PCB support 210b may be adjusted so that the overall light distribution may be formed in a wide and uniform shape. .

For example, light distribution is made by making the brightness of the LED 230 coupled to the first PCB support 210a and the second PCB support 210b greater than the brightness of the LED 230 coupled to the third PCB support 210c. It can be made wide and uniform. That is, when the PCB 220 includes three or more surfaces, the luminance of the LEDs 230 mounted on the PCB 220 in both lateral directions is the omnidirectional PCB 220 located between the PCB 220 in both lateral directions. It may be greater than the brightness of the LED 230 mounted on. Here, the brightness of the LED 230 may be controlled by controlling the input current or by varying the number of the LED 230.

In addition, the brightness of the LED 230 may be adjusted to correspond to the cross section of the light transmitting unit 240. That is, when the PCB 220 includes three or more surfaces, and the cross section of the light transmitting part 240 faces the PCB 220, the PCB 220 is mounted on the surface of the PCB 220 opposite to the side surface of the cross section of the light transmitting part 240. The luminance of the LED 230 may be greater than the luminance of the LED 230 mounted on the surface of the PCB 220 opposite to the front surface of the cross section of the light transmitting unit 240.

In addition, when the light transmitting part 240 has a trapezoidal cross section, a pattern is formed on a portion corresponding to the bottom of the trapezoid, or translucent or opaque to reduce light distribution in the direct direction, and light distribution inclined to both sides through the side surfaces of the trapezoid is reduced. It can also be formed so that the overall light distribution of the LED light is wide and uniform.

Referring to FIG. 8A, the first PCB support part 210a, the second PCB support part 210b, the fourth PCB support part 210d, and the fifth PCB support part 210e are sequentially coupled. Angles formed between each PCB support may be the same or different from each other. For example, when the angle formed by the first PCB support part 210a and the second PCB support part 210b is smaller than the angle formed by the second PCB support part 210b and the fourth PCB support part 210d, the first PCB support part Since the LED 230 coupled to 210a is inclined in the lateral direction of the drawing to emit light, the LED lighting according to the present exemplary embodiment may have a wide and uniform light distribution. Therefore, according to the present embodiment, the angles formed by the first PCB support 210a and the second PCB support 210b and the angles formed by the second PCB support 210b and the fourth PCB support 210d are relatively adjusted. To adjust the overall distribution curve.

Referring to FIG. 8B, one PCB support 210 is curved in an arc shape, and LED lights in which different PCBs 220 are coupled to both sides of the PCB support 210 are illustrated. . Here, the arc shape includes various curved shapes such as circles, ellipses, and curves. According to this embodiment, there is an advantage that the LED lighting according to the present embodiment can be produced by a simple process of bending one PCB support 210.

Referring to FIG. 9A, the first PCB support 210a and the second PCB support 210b are bent in the opposite direction as described above. Accordingly, the LED 230 coupled to the first PCB support 210a emits light to the left side of FIG. 9A, and the LED 230 coupled to the second PCB support 210b is shown in FIG. 9A. Since light is emitted to the right, light distribution is widened.

Here, as described above, a small angle (for example, an angle between the surfaces on which the LEDs 230 are mounted) among the angles at which the plurality of PCB 220 surfaces meet and form each other may be 45 degrees to 180 degrees. The light emitted from the LED 230 may be irradiated to the side of the LED light to form a wide and uniform light distribution.

Referring to FIG. 9B, the PCB support unit 210 includes a predetermined structure, for example, a plurality of support arms to support the PCB 220. The PCB support part 210 is formed in the form of a plurality of support arms which are spaced apart from each other. For example, the PCB support part 210 is formed to protrude in one direction from the body (ie, the upper support) and the body, and protrudes in the other direction from the body and the first support arm 210f supporting the PCB 220. It may include a second support arm (210g) for supporting the PCB 220. The first support arm 210f and the second support arm 210g may be integrally formed or partially protruded in the extending direction of the light transmitting part 240 to support the PCB 220. The first support arm 210f and the second support arm 210g may hold (eg, attach, screw, etc.) a specific portion of the PCB 220 or insert the entire PCB 220 into the PCB 220. Can support

10 to 12 are cross-sectional views schematically showing various LED lights according to another embodiment of the present invention. For convenience of description, only the PCB 220, the LED 230, and the light emitter 240 are illustrated to illustrate a cross-sectional view of the LED lighting according to the present embodiment. The traveling direction of the light forming the main light distribution is shown by the dotted arrow.

Referring to FIG. 10, the PCB 220 is planar, and a cross section of the light transmitting part 240 may have a predetermined angle to increase the intensity of side light. The side surface of the light-transmitting part 240 is formed obliquely with respect to the PCB 220. In addition, the cross section of the light transmitting unit 240 may be a polygon (a, b, c, g) including a triangle, a trapezoid, a pentagon. In addition, one surface of the light transmitting part 240 may be circular arcs d, e, and f.

Referring to FIG. 11, each of the PCBs 220 is an externally oriented type facing outwards, and the cross section of the light transmitting part 240 may have various shapes. In more detail, the side surface of the transmissive part 240 may be formed to face the PCB 220 as described above (a to h). In addition, the cross section of the light transmitting unit 240 may be a polygon (a, b, c, g, h) including a triangle, a trapezoid, a rectangle, and a pentagon. In addition, one surface of the light transmitting part 240 may be circular arcs d, e, and f as described above. Here, the case where one surface of the light transmitting part 240 is an arc includes a case where a cross section of the whole or part of the light transmitting part 240 is an arc.

Referring to FIG. 12, each PCB 220 may be inwardly directed toward the inside, and a cross section of the light transmitting part 240 may have various shapes. In detail, the side surface of the cross section of the light transmitting part 240 may be formed to face the PCB 220 as described above (a to h). In addition, the cross section of the light transmitting unit 240 may be a polygon (a, b, c, g, h) including a triangular, trapezoidal, rectangular, pentagonal and octagonal, and one surface of the light transmitting unit 240 is as described above. It may be the same arc (d, e, f).

Those skilled in the art will appreciate that various modifications and changes can be made in the present invention without departing from the spirit and scope of the invention as set forth in the claims below.

210: PCB support
210a to 210e: first to fifth PCB supports
210f: first support arm 210e: second support arm
213: floodlight holder 215: locking jaw
220: PCB 225: reflector
227: fastening portion 230: LED
240: light transmitting unit 260: power supply means
405: housing 410: PCB support
415: skin portion 420: PCB
427: fastening portion 430: LED
440: light transmitting unit 460: power supply means

Claims (4)

A PCB on which a plurality of LEDs emitting light are mounted;
The LEDs of the PCB are opposed to the surface on which the LEDs are mounted, and the angles of the side surfaces of the PCBs are 45 degrees to 175 degrees, and diffuse light emitted from the LEDs into different main light distribution directions corresponding to the predetermined angles. Light transmitting portion, wherein the light transmitting portion has a transmittance of 30% to 88% and the haze of the light transmitting portion is 42% to 99.8%;
A PCB supporter supporting the PCB; And
Including a power supply means for supplying power to the LED,
The light transmitting unit,
A base surface formed of a polymeric material or glass; And
LED lighting having a wide and uniform light distribution including one or more diffusion sheets for coupling with one or more of one surface and the other surface of the base surface.
The method of claim 1,
The base surface is LED lighting having a wide and uniform light distribution, characterized in that any one or more of one surface and the other surface is embossed or roughness (roughness) is formed rough.
The method of claim 1,
The PCB is formed with a predetermined angle so that the LEDs emit the light in different directions, and the plurality of LEDs mounted on different surfaces of the PCB are arranged in a zigzag pattern with each other. LED lights with a light.
The method of claim 1,
The number of the diffusion sheet is 1 to 3, LED diffusion having a wide and uniform light distribution, characterized in that the diffusion sheet includes a diffusion member on the outer surface or inside.

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