KR100931266B1 - Led lighting with broad and uniform light distribution - Google Patents

Abstract

PURPOSE: An indoor LED lighting device is provided to distribute light uniformly by forming a light transmission unit and a PCB(Printed Circuit Board) obliquely. CONSTITUTION: An indoor LED lighting device includes a PCB(220), a light transmission unit(240), a PCB support unit(210), and a power supply unit(260). A plurality of LEDs are mounted on the PCB. The light transmission unit is bended at 45 to 170 degrees to distribute the light of the LEDs to different light distribution direction. The light transmission unit is a diffusion plate including a diffusion element. The light transmission unit has a haze of 42 to 99.5% and the transmissivity of 35 to 86%. The PCB support unit is a frame for supporting the PCB. The power supply unit supplies the power to the LEDs.

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.

Figure 1a is a view showing a cross-sectional view of the light fixture according to the prior art and the emitted light path, Figure 1b is a view showing the light distribution curve of the light fixture shown in Figure 1a. Referring to FIG. 1A, a ceiling 2, a fluorescent lamp 4, a luminaire frame 6, and a ballast 8 are shown.

The luminaire frame 6 is made of a material having reflective performance or a reflective material is coated on the inner surface of the luminaire frame 6 so that the path of the light L2 which does not travel downward from the fluorescent lamp 4 is changed to To the right direction. According to the light distribution curve shown in FIG. 1B, the largest amount of light is distributed between about 20 degrees (°) to 40 degrees by the light (L2) directed laterally downward.

The most important role of the luminaire to be pursued by the fluorescent lamp 4 according to the prior art is to implement a uniform light distribution for the illuminance surface receiving light. The uniform illuminance distribution is controlled by adjusting various shapes and angles of the luminaire frame 6 to control the amount of light emitted, and as shown in FIG. 1B, the light L1 proceeding directly under the fluorescent lamp 4. The light distribution is shown so that the light L2 traveling at about 20 to 40 degrees has a greater amount of light than).

However, in the case of a luminaire (for example, an open fluorescent lamp or a parabolic fluorescent lamp) using the linear fluorescent lamp 4 according to the prior art, it is impossible to ignore the strong glare from the linear light source of the straight tube lamp which is a light source, so such glare on the side surface. To prevent this, as the angle toward the side increases, the light intensity is gradually weakened, and when it approaches 80 to 90 degrees, the light is blocked by the luminaire frame 6 or the like and is not emitted outside the luminaire. Therefore, since the amount of light emitted to the side is little between 70 degrees to 90 degrees near the ceiling (2), when looking at the distribution of the total amount of light, the uniformity of the illuminance surface immediately below the fluorescent lamp (4) is excellent but the side (for example, There is a limit to clarifying the entire space including the wall or ceiling (2).

In FIG. 1C, the length of the arrow indicating the direction of the light emitted from the LED 3, which is the light source in the LED light 1, is shown corresponding to the intensity of the light emitted from the LED 3. Light from the LED 3 is emitted radially. The light L3 in the downward direction is the strongest and the light L4 near the side or near the light box 7 is due to the beam angle from the LED 3 and the area occupied by the light box 7. Since the light emitting area of (3) is limited and its intensity is relatively weak, the light distribution is not uniform to replace a conventional luminaire using a fluorescent lamp.

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. 1D, the light distribution of the general LED light 1 has a high luminous intensity based on 0 degree L3 and the distance from the light source is large depending on the divergence angle. The illuminance of L2) is changed and the illuminance of the irradiated surface becomes uneven. That is, the light emitted from the LED light 1 has a light distribution in the shape of a sphere or a vertical ellipse while having the largest luminance in the vertical direction with respect to the LED 3 as a whole.

In addition, in the conventional LED lighting 1, the PCB 5 is implemented in a plane, and the LED 3 mounted thereon also emits light in a horizontally arranged state along the surface of the PCB 5. Therefore, in the conventional LED lighting 1, even if the output light passes through the light-transmitting part 9 including the diffusion member, the overall light distribution has the highest luminance in the vertical direction with respect to the LED lighting 1 as described above. Since it has a spherical shape in space, there is a problem that can not make a wide and uniform light distribution.

The background art described above is technical information possessed by the inventors for the derivation of the present invention or acquired during the derivation process of the present invention, and is not necessarily a publicly known technique disclosed to the general public before the application of the present invention.

The present invention is to provide a LED light that the light intensity emitted to the side is large, the light distribution is wide and uniformly formed.

In addition, the present invention is to provide a LED light having a wide and uniform light distribution that can emit light that can be emitted near the ceiling to implement a light distribution curve considering the illumination space.

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

According to an aspect of the invention, a plurality of LED is mounted, the PCB is a predetermined angle is formed so as to emit the light in different directions, the LED is bent so as to face the mounting surface of the LED of the PCB, A light-transmitting part formed of a diffuser plate having a diffusion member therein for diffusing light emitted from the LED in different main light distribution directions corresponding to the predetermined angle, a PCB support part supporting the PCB, and supplying power to the LED There is provided an LED light having a wide and uniform light distribution comprising a power supply means.

Here, the thickness of the diffusion plate is 0.5 to 15mm, the diffusion plate is formed of a polymer material or glass, the diffusion member is formed of a polymer or oxide (oxide) or the diffusion member is a foamed micro-cell It may be formed into an embedded foam diffusion structure.

In addition, the angle formed by the normal of the surface facing the PCB and the light transmitting portion may be from 0 degrees to 45 degrees, the transmittance of the diffusion plate may be 35% to 86%, the haze of the diffusion plate It may be 42% to 99.5%, the distance between the LED and the light emitting portion may be 5mm to 150mm, the distance between adjacent LEDs of the plurality of LEDs may be 10mm to 100mm.

Here, the length of one side of the LED which is a light source used in the present invention may be 2mm to 7mm.

In addition, 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 light transmitting portion may be 45 degrees to 170 degrees, the cross section of the PCB or the light transmitting portion is triangular, trapezoidal, It can be a polygon or arc, including rectangles and pentagrams.

In addition, when the PCB or the light transmitting part is bent, the number of bent parts may be 1 to 4, wherein the LED includes a blue spectrum, and the light emitting part converts the wavelength of the light of the LED to adjust the color temperature of the phosphor. It may include.

In addition, when the PCB includes more than three surfaces, the brightness of the LED mounted on the PCB in both lateral directions may be greater than the brightness of the LED mounted on the PCB in all directions located between the PCB in both sides, At least one surface of one side and the other side of the light transmitting part may have roughness.

The light transmitting part may further include a prism sheet that is coupled to any one or more of one surface and the other surface, and at least one of the one surface and the other surface of the light transmitting part may have a pattern for inducing diffusion of the LED light. .

In addition, the PCB includes a plurality of bent portions, the LEDs are distributedly arranged in a zigzag form, and the PCB support part has a large area corresponding to the distributedly arranged LEDs and may include a heat dissipation function.

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 having a wide and uniform light distribution according to the present invention has a large intensity of light emitted on the side, the light distribution is wide and uniformly formed, the light can be emitted near the ceiling can be implemented to implement a light distribution curve considering the illumination space, When the LED lighting of the present embodiment is installed in the indoor ceiling, the ceiling emits light, thereby indirect lighting.

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. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

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, a reflector 225, an LED 230, a light projector 240, and a power supply unit 260 are illustrated.

The present embodiment has a feature in which the PCB 220 and the light transmitting part 240 are inclined laterally to face each other so that the LED light has a uniform light distribution. LED lighting according to the present embodiment is a predetermined angle with respect to the axis perpendicular to the vertical axis of the PCB 220 provided therein and the light transmitting portion 240 for transmitting the light replaces the conventional lighting fixture used in the fluorescent, incandescent, etc. It is attached to form, or bent or curved to have a feature that can have a wide and uniform light distribution. That is, the LED lighting according to the present embodiment is provided with the PCB 220 and the light transmitting part 240 maintaining a predetermined angle so that the LED 230 has a wide light distribution by irradiating different directions.

The best light distribution curve of illumination includes, firstly, a butterfly-shaped light distribution curve in which the intensity of light is the highest at about 20 to 40 degrees, such as a conventional fluorescent lamp, so that the illuminance surface receiving the light is even without shadows. In the case of the flat type, it is not a line light source or a point light source, so it is not necessary to sharply reduce the light quantity even at an angle of 30 degrees or more. Rather, at a light level of 80 to 90 degrees, a certain amount of light is enough to illuminate the ceiling next to the luminaire. The light distribution curve, that is, the light distribution considering the illuminance space rather than the illuminance plane is the best. The present invention has been developed to implement the latter function more intensively.

The present invention can be applied to flat lighting and tubular lighting. That is, the light-transmitting part 240 may be applied to a flat lamp formed flat, such as a plane, and a tubular light formed in a tube shape such as 1 letter, V letter, circular shape, or U letter. 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 luminaire frame, that is, a light box formed entirely in a flat shape, such as a light used as indoor lighting in a home. Hereinafter, a case where the light transmitting part 240 is a flat type will be described.

The PCB support part 210 is a frame supporting the PCB 220, and each surface on which the PCB 220 is provided in order 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 170 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 170 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. The angle θ1 formed by the light transmitting part 240 may also be 45 degrees to 170 degrees corresponding to the angle of the PCB 220 described above.

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 a 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 has a thickness of several hundreds of micrometers and is a sheet having the aforementioned diffusion member attached to an outer surface thereof. 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 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, and include the above-described diffuser member. The thickness of the diffusion plate according to the present embodiment may be, for example, 0.5 to 15mm.

In addition, the transmittance of the diffusion plate according to the present embodiment may be 35% to 86%, and the haze may be 42% to 99.5%. 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-described diffusion member may be formed of an oxide-based or may be formed of a foamed diffusion structure including a foamed microcell. In the case of the former, an oxide-based material used as a diffusion member may be, for example, Si powder, TiO, TiO 2, SiO, SiO 2, ZnO 2, ZrO 2, or the like. In the latter case, the diffusion member is not composed of a separate organic or inorganic diffusion agent, the diffusion plate itself is implemented as a continuous and irregular foamed microcell, the light passing through the inside of the diffusion plate is diffused by such a microcell.

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 the formed so as to face is formed to be substantially parallel, including the case where the mathematically strictly parallel, according to the present embodiment, the normal of the surface that the PCB 220 and the light emitting unit 240 face each other This forming angle may be 0 degrees to 45 degrees.

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 unit 240 are respectively opposed to the PCB 220, the angle θ ₁ between the sides may be 45 to 170 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 150mm. 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 LED 230 in the plurality of LEDs 230 may be 10mm to 100mm, when the LED 230 is a rectangular length of one side, that is, the horizontal length and vertical length is 2mm to 7mm respectively Can be. In general, the plane of the LED 230 is rectangular, has the same size as above, and when maintaining the above-mentioned distance, the LED 230 is not displayed as a point light source and is uniform to the outside in accordance with the above-described transmittance and haze of the diffusion plate. The advantage is that it can emit light.

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 formed integrally 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. That is, the light distribution curve according to the present embodiment is widely distributed because the light of the LED 230 is intensityd to the side (for example, the 90 degree direction).

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.

FIG. 2C is a comparison diagram showing an experimental example of the LED lighting shown in FIG. 2A. FIG. (A) is a case where the LED light according to the present embodiment emits light, and (B) is a case where the light fixture according to the prior art emits light. Looking at this comparison, since the LED lighting according to the present embodiment, both the PCB 220 and the light emitting part 240 are inclined to face each other, the intensity of the side light is large, and there is an advantage of having a wide and uniform light distribution curve.

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. Referring to FIG. 3A, a PCB support 210, a PCB 220, an LED 230, a light emitter 240, and a power supply unit 260 are shown. The differences from the above will be explained mainly.

Referring to FIG. 3A, the PCB 220 is largely divided into detailed parts. That is, the PCB 220 is disposed in the center, left, and right, and the PCB 220 disposed on the left and right sides is inclined in different directions, and thus the main light distribution direction is different from each other. Therefore, by this structure, this embodiment has a wide and uniform light distribution.

FIG. 3B illustrates an embodiment in which the LED lighting shown in FIG. 3A is manufactured. (A) is a perspective view showing the LED light in the state that does not attach the light-transmitting part 240, (B) is a state in which the LED 230 is lit on the LED light shown in (A), (C) is a LED light is turned on in the state which attached the light part 240. FIG.

In addition, referring to FIG. 3C, 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.

According to this embodiment, in order to have a wide and uniform light distribution as described above, the PCB 220 includes a plurality of bent portions (that is, the PCB 220 is bent several times), and at the same time the bright point of the LED 230 By arranging the LED 230 in a zigzag form so as not to be displayed to the outside, the heat generation of the LED 230 is naturally dispersed by the bending of the PCB 220 and the zigzag arrangement of the LED 230, and also formed of a wide metal. The heat dissipation characteristics are excellent through the PCB support unit 210.

In addition, the LED 230 is distributed in a zigzag form to increase the uniformity of the light transmitting part when turned on, which is advantageous for heat dissipation, and since the PCB support part 210 corresponds to the bent and dispersed LED 230, its area is wider, which is more advantageous for heat dissipation. There is an advantage.

In addition, referring to FIG. 4, the LED lighting according to the present exemplary embodiment may have a structure having a wide and uniform light distribution in four directions or a circular shape (including elliptical shape) 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) and (D) are structures 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 circle (B, D), the PCB 220 and / or the light emitting part 240 may be formed 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 and a plan view of a LED lighting having a wide and uniform light distribution have been described in general. Hereinafter, with reference to the accompanying drawings, a LED lighting having a wide and uniform light distribution according to the present invention will be described with reference to specific embodiments. I decided to. Examples will be described below in turn, and it is obvious that the present invention is not limited to these examples.

5A to 5E are perspective views of LED lighting according to another embodiment of the present invention. 5A to 5E, the PCB support 210 is formed with a plurality of surfaces to which different PCBs 220 are coupled, or a cross section of the PCB support 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, and the arrow represents the intensity of light whose length is proportional to the amount of light. 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. 5A (A), the first PCB support part 210a and the second PCB support part 210b form the aforementioned angles and are coupled to each other. Since 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 to irradiate light L6 on both sides thereof. According to the light distribution of the LED light forms a wide distribution.

Referring to FIG. 5A, 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 L6 more strongly at 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.

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. 5C (A), the PCB support (the first PCB support 210a and the second PCB support 210b) is bent once and the light transmitting portion 240 is bent twice. Referring to (B) of 5c, a shape in which the PCB support (the first PCB support 210a, the third PCB support 210c and the second PCB support 210b) is bent twice is shown. In this case, as described above, the side light L6 may be generated to form a wide and uniform light distribution.

Referring to FIG. 5C (A), 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 L6, 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. 5C, 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. do. 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. 5D (A), the first PCB support part 210a and the second PCB support part 210b are bent and formed in opposite directions as described above. Accordingly, the LED 230 coupled to the first PCB support 210a emits light to the left side of FIG. 5D (A), and the LED 230 coupled to the second PCB support 210b is illustrated in FIG. 5D (A). Since light is emitted to the right side of), light distribution is widened.

Here, as described above, a small angle (for example, an angle between the surfaces on which the LED 230 is mounted) among the angles at which the plurality of PCB 220 surfaces meet and form each other may be 45 degrees to 170 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. 5D (B), the PCB supporter 210 supports a PCB 220 with a predetermined structure, for example, a plurality of support arms. 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

Referring to FIG. 5E, the PCB 220 has a shape attached to a portion of the spherical surface, and the light transmitting part 240 is also formed to correspond to the shape of the PCB 220. The LEDs 230 may be spaced apart from each other by a distance as described above on the PCB 220, and may be arranged in a line or zigzag form.

6A and 6B are cross-sectional views schematically illustrating LED lighting having a wide and uniform light distribution according to another embodiment of the present invention. As described above, only the PCB 220, the LED 230, and the light emitter 240 are illustrated for the convenience of description and a cross-sectional view of the LED lighting according to the present embodiment will be described. The traveling direction of the light forming the main light distribution is shown by the dotted arrow.

Referring to FIG. 6A, each PCB 220 may be externally oriented in an outward direction, and a 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. Here, when the PCB or the light transmitting portion is bent as shown, the number of bent portions may be in the range of 1 to 4.

Referring to FIG. 6B, each PCB 220 is inwardly directed toward the inside, and the 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.

1a shows a cross-sectional view of a luminaire according to the prior art and the light path emitted.

FIG. 1B shows a light distribution curve of the luminaire shown in FIG. 1A. FIG.

1c shows a perspective view of an LED light according to the prior art and the light path emitted.

1D is a light distribution curve of the LED light shown in FIG. 1C.

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.

FIG. 2C is a comparison diagram showing an experimental example of the LED lighting 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.

Figure 3b is an embodiment of the LED lighting shown in Figure 3a.

Figure 3c is a view showing the LED mounting on the PCB used in the LED lighting according to an embodiment of the present invention.

4 illustrates various forms of LED lighting according to an embodiment of the present invention.

5A-5E are perspective views of LED lighting having a wide and uniform light distribution in accordance with another embodiment of the present invention.

6A and 6B are cross-sectional views schematically showing LED lighting having a wide and uniform light distribution according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

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

Claims (21)

A PCB on which a plurality of LEDs are mounted; In order to diffuse the light emitted from the LED of the PCB in different main light distribution direction, a small angle among the angles formed to each other is bent to 45 degrees to 170 degrees, the diffusion plate including a diffusion member for diffusing the light therein Formed transmissive portion, wherein the transmittance of the diffusion plate is 35% to 86% and the haze of the diffusion plate is 42% to 99.5%; A PCB supporter supporting the PCB; And Indoor LED lighting having a wide and uniform light distribution comprising a power supply means for supplying power to the LED. The method of claim 1, Indoor LED lighting having a wide and uniform light distribution, characterized in that the thickness of the diffusion plate is 0.5 to 15mm. The method of claim 1, The diffusion plate is a indoor LED lighting having a wide and uniform light distribution, characterized in that formed of a polymeric material or glass. The method of claim 1, The diffusion member is a indoor LED lighting having a wide and uniform light distribution, characterized in that formed of a polymer or oxide (oxide) series. The method of claim 1, The diffusion member is a indoor LED lighting having a wide and uniform light distribution, characterized in that formed in a foamed diffusion structure containing a micro cell of the foamed form. The method of claim 1, Indoor LED lighting having a wide and uniform light distribution, characterized in that the angle formed by the normal of the surface facing the PCB and the light-transmitting portion is 0 degrees to 45 degrees. delete delete The method of claim 1, Indoor LED lighting having a wide and uniform light distribution, characterized in that the separation distance between the LED and the light transmitting portion is 5mm to 150mm. The method of claim 1, Indoor LED lighting having a wide and uniform light distribution, characterized in that the distance between the adjacent LED of the plurality of LED is 10mm to 100mm. The method of claim 1, Indoor LED lighting having a wide and uniform light distribution, characterized in that the length of one side of the LED is 2mm to 7mm. The method of claim 1, The power supply means for indoor LED lighting having a wide and uniform light distribution, characterized in that located in the groove formed by bending the PCB support. delete The method of claim 1, Cross section of the PCB or the light-transmitting part is a indoor LED light having a wide and uniform light distribution, characterized in that the polygon or arc including a triangle, trapezoid, rectangle and pentagon. The method of claim 14, Indoor PCB lighting having a wide and uniform light distribution, characterized in that the number of the bent portion is 1 to 4 when the PCB or the light transmitting portion is bent. delete The method of claim 1, When the PCB includes more than three surfaces, the brightness of the LED mounted on the PCB in both lateral directions is wider than the brightness of the LED mounted on the PCB in all directions located between the PCB in both lateral directions. Indoor LED lighting with uniform light distribution. The method of claim 1, At least one of the one surface and the other surface of the light transmitting portion is a room LED lighting having a wide and uniform light distribution, characterized in that roughness. The method of claim 1, The indoor LED light having a wide and uniform light distribution, characterized in that the light transmitting portion further comprises a prism sheet coupled to any one or more of one surface and the other surface. The method of claim 1, At least one of the one surface and the other surface of the light transmitting portion is a indoor LED lighting having a wide and uniform light distribution, characterized in that the pattern is formed to induce the diffusion of the LED light. The method of claim 1, The PCB includes a plurality of bent portions, the LEDs are distributedly arranged in a zigzag shape, and the PCB support part has a large area corresponding to the distributedly arranged LEDs and has a wide and uniform light distribution, which includes a heat dissipation function. LED lighting for indoors.

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