KR100924093B1 - Slim type light panel - Google Patents

Abstract

The present invention relates to a light panel for forming a surface light source, and more particularly, to efficiently dissipate heat generated from an LED bar as a light source and at the same time minimize the thickness and weight of the light panel, such as lighting or billboards. The present invention relates to an ultra-slim light panel that can be widely used.

Ultra-slim light panel according to the present invention is a rectangular light guide plate having a predetermined thickness; A plurality of LED lamps and a PCB board on which the plurality of LED lamps are mounted at predetermined intervals, the LED bars being disposed so that the LED lamps face opposite sides of the light guide plate; A pair of vertical frames in which an accommodating part having a “c” shaped cross section into which the side ends of the LED bar and the light guide plate are fitted is formed and a heat dissipating part is formed outward; And a pair of horizontal frames having a “c” shaped cross section into which a side end portion of the light guide plate is fitted, and a heat radiating portion formed outward to connect the pair of vertical frames, respectively. Is characterized in that to form a surface light source by uniformly reflecting the light incident from the LED lamp through one or both surfaces.

Light panel, surface light source, LED, lighting, advertisement, light guide plate, image plate

Description

Super slim light panel {SLIM TYPE LIGHT PANEL}

The present invention relates to a light panel for forming a surface light source, and more particularly, to efficiently dissipate heat generated from an LED bar as a light source and to minimize the thickness and weight of the light panel. The present invention relates to an ultra-slim light panel that can be widely used for lighting or billboards.

In general, a light panel is a surface light source that uniformly shines the surface of the flat panel display device using the back light unit technology, and is mainly used as various advertisement boards by placing advertising image plates on the front surface.

Fluorescent lamps, cold cathode fluorescent lamps, and light emitting diode lamps (hereinafter referred to as LED lamps) are used as light sources of such light panels. In particular, the LED lamp has been adopted as a light source of the light panel because it has excellent color reproducibility, light efficiency, high life, low power consumption, light weight, and thinness. On the other hand, a plurality of LED lamps are arranged at regular intervals, the LED bar of the type mounted on a bar-shaped printed circuit board (hereinafter, PCB board) is used as a light source of the light panel.

Hereinafter, a light panel using an LED bar according to the prior art will be described with reference to FIGS. 1A and 1B. FIG. 1A is a front view illustrating a portion of a light panel according to the related art, and FIG. 1B is a cross-sectional view taken along line AA ′ of FIG. 1A.

1A and 1B, the light panel according to the related art includes a framed frame 110, a light guide plate 120 provided with a reflective sheet on a rear surface thereof and supported by the framed frame 110. The light guide plate 120 is provided on both sides of the light emitting LED bar 130 and the light guide plate 120 is provided with an image plate 150 and the like.

Framed frame 110 has a frame form consisting of a vertical frame and a horizontal frame provided in pairs, are coupled by a fixing bracket 170, both ends are bolted in a state fitted to the vertical frame and the horizontal frame. In this case, the light guide plate 120 and the LED bar 130 are supported while being inserted into the frame type frame 110. In addition, the translucent image plate 150 positioned on the front surface of the light guide plate 110 has a structure in which an edge thereof is pressed and supported by a cover 160 hinged to the frame 110.

Meanwhile, the light panel according to the related art forms grooves 122 at both edge portions of the light guide plate 120 to install a pair of LED bars 130 on both sides thereof, and the grooves 122 of the light panel are formed in the groove 122. The LED bar 130 is inserted into the lamp 134 to emit light through the side of the light guide plate 120. At this time, in order to dissipate heat generated from the LED bar 130, the heat radiation tape 140 was attached to the PCB substrate 134 of the LED bar and attached to the groove 122 formed in the light guide plate 130.

The light panel according to the related art has a structure in which heat generated from the LED bar 130 is transferred to the light guide plate 120 through the heat radiation tape 140 to radiate heat. However, as the temperature of the light guide plate 120 rises due to the LED bar 130, the heat radiation effect of the LED bar 130 decreases. Eventually, the heat dissipation action of the LED bar 130 does not proceed smoothly, so that the LED bar 130 is overheated, thereby damaging the PCB substrate 134 and the LED lamp 132 and shortening the life of the LED bar 130. A problem occurred.

In addition, since the light panel according to the related art has a structure of digging a groove 122 for installing the LED bar 130 on the light guide plate 120 as shown in FIGS. 1A and 1B, the thickness of the light guide plate 120 is increased. Is inevitably larger than the thickness of the LED bar 130. The framed frame 110 has a structure for installing the fixing bracket 170 on its rear surface, and a cover 160 for supporting the image plate 150 on its upper surface. Therefore, as described above, the light panel is thickened by the light guide plate 120 and the frame type frame 110. As a result, a manufacturing cost of the light guide plate 120 and the frame type frame 110 may increase. In addition, since the overall weight of the light panel is large, there is a problem that not only the installation problem occurs, but also the slimness of the light panel is not aesthetically good.

The present invention was created to solve the above-mentioned problems of the prior art, to provide a light panel that can extend the life of the LED bar by preventing the LED bar from overheating by efficiently dissipating heat generated from the LED bar. The purpose is.

In addition, an object of the present invention is to provide an ultra-slim light panel that is easy to install the light panel by slimming the thickness of the light panel to the maximum, and beautiful in design.

In order to achieve the above object, the ultra-slim light panel according to the present invention comprises a rectangular light guide plate having a predetermined thickness; A plurality of LED lamps and a PCB board on which the plurality of LED lamps are mounted at predetermined intervals, the LED bars being disposed so that the LED lamps face opposite sides of the light guide plate; A pair of vertical frames in which an accommodating part having a “c” shaped cross section into which the side ends of the LED bar and the light guide plate are fitted is formed and a heat dissipating part is formed outward; And a pair of horizontal frames having a “c” shaped cross section into which a side end portion of the light guide plate is fitted, and a heat radiating portion formed outward to connect the pair of vertical frames, respectively. Is characterized in that to form a surface light source by uniformly reflecting the light incident from the LED lamp through one or both surfaces. At this time, it is preferable to further include a semi-transparent image plate is provided on one side or both sides of the light guide plate that reflects the light incident from the LED lamp is supported by the receiving portion of the vertical frame and the horizontal frame.

In the ultra-slim light panel according to the present invention, the heat radiating portions of the vertical frame and the horizontal frame are preferably composed of at least two heat radiating plates arranged to be spaced at a predetermined interval. At this time, the vertical frame and the horizontal frame is more preferably made of a metal with high thermal conductivity. In addition, it has a "b" shape, it is preferable to further include a plurality of fixing brackets which are connected between the plurality of heat sinks and fixed to connect the vertical frame and the horizontal frame in contact with each other. At this time, the fixing bracket is more preferably formed with a plurality of projections on one side or both sides is inserted into the wedge method between the heat sink.

In addition, in the light panel according to the present invention, it is preferable that the two adjacent heat sinks further include bent portions formed to protrude toward each other at their ends, and further include panel installation means supported by the bent portions. . At this time, the panel mounting means is more preferably both ends of the wire is supported by the bent portion, or a through hole is formed on one side and the other side is a bracket supported by the bent portion.

The ultra-slim light panel according to the present invention has an advantage of preventing heat shortening due to overheating of the LED bar by efficiently dissipating heat generated from the LED bar through the vertical frame and the horizontal frame.

In addition, the ultra-slim light panel according to the present invention has the advantage that the thickness can be maximized. As a result, the manufacturing cost can be greatly reduced, and the weight is light, thereby making it easy to install, and there is an advantage of implementing a beautiful design in terms of design.

The object of the present invention and the configuration, operation and effect of the present invention to achieve the same will be more clearly understood by the following detailed description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Figure 2a is a front view showing a part of the cut light panel according to an embodiment of the present invention, Figure 2b is a cross-sectional view taken along the line BB "of Figure 2a, Figure 3 is a light panel according to an embodiment of the present invention Figure 4 is an exploded perspective view of, Figure 4 is a cross-sectional view showing a state where the fixing bracket is fitted to the vertical and horizontal frames of the present invention, Figure 5 is a view showing a state in which the panel mounting means is installed on the upper horizontal frame of the present invention.

The ultra-slim light panel 1 according to an embodiment of the present invention includes a light guide plate 10, an LED bar 30, a vertical frame 40a, and a horizontal frame 40b as shown in FIGS. 2A to 3. It is configured by.

The light guide plate 10 is a plastic molded lens having a rectangular thickness. It is usually made of acrylic injection molding, and the light incident from the side is uniformly reflected through one or both sides of the light guide plate 10 to form a surface light source. In the drawings of the present invention, the surface light source is formed through one surface of the light guide plate 10. Although not shown in the drawing, the LGP 10 may serve as a one-way surface light source that reflects light incident from the side of the LGP to the front surface of the LGP 10 by a reflection pattern and a reflective sheet formed on the rear surface of the LGP. In addition, the light guide plate 10 may serve as a bidirectional surface light source by reflecting the light incident from the side surface to the back and the front of the light guide plate 10 by a reflection pattern and a reflection sheet formed at the center of the light guide plate 10.

The light guide plate 10 has a high brightness, that is, by adjusting the density distribution of the reflection pattern of the light guide plate 10 and the like to uniform the distribution of light emitted to one or both sides of the light guide plate, It is desirable to perform a uniform illumination function as a light source. Since the technology related to the light guide plate 10 is known in the art, a detailed description thereof will be omitted.

The LED bar 30 is mounted on the PCB substrate 34 having a rod shape such that the plurality of LED lamps 32 are arranged at regular intervals, and are disposed to face opposite sides of the light guide plate 10. According to one embodiment of the present invention, a pair of LED bars 30 is provided, but the light guide plate 10 may be disposed one by one on each side of the light guide plate 10 so as to increase the size of the light guide plate 10 or to provide a stronger lighting effect. In addition, the PCB substrate 34 of the LED bar 30 may be made of a flexible material that can be bent. The LED bar 30 emits light from the side of the light guide plate 10 so that the light guide plate 10 functions as a surface light source.

Meanwhile, as illustrated in FIGS. 2A to 3, the image plate 20 may be further provided on one surface or both surfaces of the light guide plate 10. Image plate 20 is a translucent material is formed with an image having a predetermined color. Therefore, the light panel 1 having the image plate 20 may be used as interior lighting or various advertisement boards. In addition, the light panel 1 may be used so as to have an illumination function without providing the image plate 20.

The vertical frame 40a and the horizontal frame 40b are provided in pairs, respectively, and connected to each other to accommodate and support the light guide plate 10, the image plate 20, and the LED bar 30. That is, as shown in FIGS. 2A to 3, the vertical frame 40a has an accommodating part 42 having a “c” shaped cross section into which the side ends of the LED bar 30 and the light guide plate 10 are fitted. The heat radiating portion 44 is formed outside. The horizontal frame 40b has an accommodating portion 42 having a “c” shaped cross section into which the side end portion of the light guide plate 10 is fitted, and a heat dissipating portion 44 is formed on the outside thereof.

Meanwhile, according to the exemplary embodiment of the present invention, the LED bar 30 is accommodated by the light guide plate 10 and the vertical frame 40a. That is, the LED lamp 32 of the LED bar 30 is adjacent to the light guide plate 10, the PCB substrate 34 of the LED bar 30 is in contact with the vertical frame 40a. Therefore, since the LED lamp 32 is not directly loaded by the light guide plate 10, and is only adjacent, the LED lamp 32 can be prevented from being damaged. If the LED bar 30 is provided in the horizontal frame 40b disposed below, the LED lamp 32 receives the load of the light guide plate 10 directly between the LED bar 30 and the light guide plate 10. It is necessary to provide a predetermined member capable of supporting the load of the light guide plate 10 without preventing the LED lamp 32 from diverging. Then, the heat generated from the LED bar 30 is transmitted to the vertical frame 40a is to radiate heat from the radiator 44.

At this time, the heat dissipation portion 44 of the vertical frame 40a and the horizontal frame 40b is preferably composed of at least two heat sinks 45 arranged to be spaced apart at a predetermined interval, as shown in FIG. The heat sink 45 is to heat the heat generated from the LED bar 30 to the air by increasing the contact area with the air. In other words, the LED bar 30 is cooled by air cooling. Therefore, two or more heat sinks 45 are provided to increase the contact area with air, and preferably, four or more heat sinks may be provided as shown in FIG. 2B.

In addition, the vertical frame (40a) and the horizontal frame (40b) is preferably made of a high thermal conductivity metal in order to increase the heat radiation effect of the LED bar (30). For example, the vertical frame 40a and the horizontal frame 40b are preferably made of aluminum, silicon, galvanized steel, or the like. As a result, since the heat generated from the LED bar 30 can be efficiently dissipated, it is possible to prevent shortening of life due to overheating of the LED bar 30.

On the other hand, the vertical frame 40a and the horizontal frame 40b of the present invention may also be connected by welding or the like, but according to one embodiment of the present invention, the light panel 1 may be easily disassembled and assembled. As shown in FIG. 3 and FIG. 4, it is preferable to be connected and fixed by the fixing bracket 50 having a "a" shape. That is, the fixing bracket 50 is sandwiched between the heat sink 45 of the vertical frame 40a and the horizontal frame 40b, the both ends of which are in contact with each other to fix the vertical frame 40a and the horizontal frame 40b. That is, as illustrated in FIGS. 3 and 4, the vertical frames 40a and the horizontal frames 40b adjacent to each other having four heat sinks 45 are connected by three fixing brackets 50. Therefore, a total of twelve fixing brackets 50 are used, three at four corners of the light panel 1. In addition, the light panel 1 of the present invention is installed by varying the number of fixing brackets 50 depending on the number of heat sinks 46 provided in the vertical frame 40a and the horizontal frame 40b or in consideration of the coupling strength. Can be.

At this time, the fixing bracket 50 is preferably formed with a plurality of projections 52 on one side or both sides. That is, as shown in Figures 2a, 3 and 4, the projection 52 may be formed on one surface of the fixing bracket 50, it may be installed on both sides. Therefore, the fixing bracket 50 in which the protrusions 52 are formed is sandwiched in a wedge-like manner between the heat sinks 45 by pressing by hand or using an extension such as a hammer. At this time, the protrusions 52 are formed to be in contact with the heat sink 45 is smooth, so that the predetermined clamping force 50 is easily inserted between the heat sink 45 when a predetermined force is applied. Therefore, as shown in FIG. 4, the plurality of fixing brackets 50 inserted between the heat sinks 45 exert a force on each other in the direction of the arrow, thereby firmly connecting the vertical frame 40a and the horizontal frame 40b. I can fix it. And, if you want to disassemble the light panel 1, insert the pointed tool between the heat sink 45 and remove the fixing bracket 50 using the principle of the lever.

Meanwhile, in the light panel 1 according to the present invention, two adjacent heat sinks 45 of the plurality of heat sinks 45 provided in the vertical frame 40a and the horizontal frame 40b are projected toward each other at their ends. It is preferable that the formed bent portion 46 is further formed and further includes panel mounting means 62, 64 supported by the bent portion 46. That is, the light panel 1 of the present invention is to be installed using the pair of bent portions 46. In addition, since the bent portion 46 of the heat sink has an effect of increasing the contact area with air, the heat radiation effect of the heat sink 44 can be increased. The panel mounting means 62 and 64 are for installing the light panel 1 of the present invention on a wall or other place.

Examples of such panel mounting means 62, 64 are shown in Figs. 5A and 5B. As an example, as shown in FIG. 5A, the panel mounting means may be a wire 62 having both ends 62a supported by the bent portion 46 of the heat sink. The wire 62 is preferably made of a steel wire to withstand the load of the light panel 1, and both ends 62a of the wire have a blunt shape as shown in FIG. 5A. The wire 62 sandwiches both ends 62a of the wires between the heat sinks 45 of the horizontal frame 40b positioned at the upper side when the light panel 1 is assembled, and connects both ends 62a of the wires using bolts or the like. You can fix it. Therefore, the light panel 1 in which the wire 62 is installed is installed by hanging the wire 62 on the nail nailed to the wall.

In addition, as another example of the panel mounting means, as shown in FIG. 5B, a through hole 64a is formed at one side, and the other side may be a bracket 64 supported by the bent portion 46. On the other side of the bracket 64, a support portion 64b having a blunt form is formed in the same manner as the wire 62, and is disposed between the heat sinks 45 of the horizontal frame 40b positioned at the upper side when the light panel 1 is assembled. The bracket 64b can be inserted. Therefore, the light panel 1 in which the bracket 64 is installed is installed in such a manner that the light panel 1 is attached to the nail nailed to the wall through the through hole 64a of the bracket.

On the other hand, the light panel 1 of the present invention as described above is not a method of digging a groove in the light guide plate, and installing an LED bar in the groove, as in the conventional light panel. Therefore, the thickness of the light guide plate 10 can be reduced as compared with the conventional light panel. In addition, the conventional light panel is provided with a cover for fixing the image plate, while the light panel 1 of the present invention does not require a cover, and is directly supported by the vertical frame 40a and the horizontal frame 40b. By doing so, it is possible to reduce the thickness of the light panel (1). Furthermore, the conventional light panel has a structure for fitting the fixing bracket to the back of the frame to combine the vertical and horizontal frames, the light panel 1 of the present invention, the fixing bracket 50 is a vertical and horizontal frame 40a , 40b is to be fitted to the heat sink 45 to reduce the thickness of the light panel (1). Therefore, the light panel 1 according to the present invention can be made ultra slim. As a result, the manufacturing cost of the light guide plate 10 and the frames 40a and 40b can be greatly reduced, and the weight is light, thereby making it easy to install. In addition, the slim design of the light panel 1 enables to implement an elegant design.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Figure 1a is a front view showing a cut part of the light panel according to the prior art,

1B is a cross-sectional view taken along the line AA ′ of FIG. 1A;

Figure 2a is a front view showing a cut part of the light panel according to an embodiment of the present invention,

FIG. 2B is a cross-sectional view taken along the line BB ′ of FIG. 2A;

3 is an exploded perspective view of a light panel according to an embodiment of the present invention,

4 is a cross-sectional view showing a state where the fixing bracket is fitted to the vertical and horizontal frames of the present invention,

5 is a view showing a state in which the panel installation means is installed on the upper horizontal frame of the present invention.

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

1: light panel 10: light guide plate

20: Image plate 30: LED bar

32: LED lamp 34: PCB board

40a: vertical frame 40b: horizontal frame

42: accommodating part 44: heat dissipating part

45: heat sink 46: bent portion

50: fixing bracket 52: protrusion

62: wire 64: bracket

Claims (9)

A rectangular light guide plate having a constant thickness; A plurality of LED lamps and a PCB board on which the plurality of LED lamps are mounted at predetermined intervals, the LED bars being disposed so that the LED lamps face opposite sides of the light guide plate; A pair of vertical frames in which an accommodating part having a “c” shaped cross section into which the side ends of the LED bar and the light guide plate are fitted is formed and a heat dissipating part is formed outward; And a pair of horizontal frames having a “c” shaped cross section into which the side end of the light guide plate is fitted inward, and a heat dissipating portion formed outward, respectively, connected to the pair of vertical frames, respectively. The light guide plate uniformly reflects the light incident from the LED lamp through one or both surfaces thereof to form a surface light source, Each of the heat dissipation parts of the vertical frame and the horizontal frame is provided with at least two heat dissipation plates spaced apart from each other, The ultra-slim light panel having a shape of "a", further comprising a plurality of fixing brackets connected between the plurality of heat sinks to connect the vertical frame and the horizontal frame to be in contact with each other. The method of claim 1, And a translucent image plate provided on one side or both sides of the light guide plate on which the light incident from the LED lamp is reflected and supported by the receiving unit of the vertical frame and the horizontal frame. delete delete delete The method of claim 1, The fixing bracket has a plurality of projections formed on one side or both sides, ultra-slim light panel, characterized in that inserted in the wedge method between the plurality of heat sinks. A rectangular light guide plate having a constant thickness; A plurality of LED lamps and a PCB board on which the plurality of LED lamps are mounted at predetermined intervals, the LED bars being disposed so that the LED lamps face opposite sides of the light guide plate; A pair of vertical frames in which an accommodating part having a “c” shaped cross section into which the side ends of the LED bar and the light guide plate are fitted is formed and a heat dissipating part is formed outward; And a pair of horizontal frames having a “c” shaped cross section into which the side end of the light guide plate is fitted inward, and a heat dissipating portion formed outward, respectively, connected to the pair of vertical frames, respectively. The light guide plate uniformly reflects the light incident from the LED lamp through one or both surfaces thereof to form a surface light source, Each of the heat dissipation parts of the vertical frame and the horizontal frame is provided with at least two heat dissipation plates spaced apart from each other, Two adjacent heat sinks further include bent portions formed to protrude toward each other at their ends, Ultra-thin light panel, characterized in that it further comprises a panel mounting means supported by the bent portion. The method of claim 7, wherein The panel mounting means is an ultra-slim light panel, characterized in that both ends of the wire is supported by the bent portion. The method of claim 7, wherein The panel mounting means is a ultra-slim light panel, characterized in that the through-hole is formed on one side, the other side is a bracket supported by the bent portion.

Images