KR20200130582A - Flat-plate lighting apparatus with LED module - Google Patents

Abstract

The present invention discloses a flat panel lighting device with an LED module. According to the present invention, the flat panel lighting device includes: a frame installed on the ceiling and formed in a flat plate structure; an LED module installed inside the frame and emitting light; a reflective sheet laminate which is installed so as to be in contact with the LED module inside the frame and reflects the light; a diffusion plate which is installed to be spaced apart from a light guide plate in the interior of the frame and diffuses scattered light; and a clamp which is installed to be assembled with the LED module inside the frame, and fixes the reflective sheet laminate and the light guide plate to be in close contact with each other. According to the present invention, manufacturing costs and installation costs can be lowered by increasing light efficiency and minimizing assembly and weight.

Description

Flat-plate lighting apparatus with LED module}

The present invention relates to a flat panel lighting device, and more particularly, to a flat panel lighting device having an LED module that improves light efficiency and minimizes assembly and weight.

In general, fluorescent lamps are widely used as lighting devices in offices and homes because they consume relatively little power and have a longer service life than incandescent lamps. These fluorescent lamps are mounted on a luminaire body installed on the ceiling to form a luminaire.

Meanwhile, in recent years, as a new lighting device, a flat panel lighting device using LED as a light source has been developed and used. Flat panel lighting devices have a number of LEDs installed inside them, and these LEDs are emerging as next-generation lighting devices because power consumption is only a few minutes compared to fluorescent lamps, and their service life reaches tens of thousands of hours.

However, the overall structure of a flat panel lighting device using LED as a light source is completely different from that of a fluorescent lamp. Therefore, in order to install a flat panel lighting device, the entire luminaire using an existing fluorescent or incandescent lamp must be replaced with a completely new one, so there is a problem of minimizing the assembling property of the flat panel lighting device to reduce the installation cost.

Korean Registered Patent Publication No. 10-1733697 (2017.05.12.)

It is an object of the present invention to provide a flat panel lighting device having an LED module that improves light efficiency, minimizes assembly and weight, thereby lowering manufacturing cost and installation cost.

In order to achieve the above object, a flat panel lighting device having an LED module according to the present invention is installed on a ceiling, a frame formed in a flat plate structure, an LED module installed inside the frame and emitting light, and the inside of the frame A light guide plate installed in contact with the LED module and installed to be in contact with the reflective sheet laminate to reflect the light, a light guide plate installed to contact the reflective sheet laminate among the inside of the frame, and distribute the reflected light to the entire area, the interior of the frame The light guide plate and the light guide plate are installed to be spaced apart from each other by a predetermined distance, the diffuser plate for diffusing the scattered light and the light guide plate are installed to be integrated with the LED module inside the frame, and the reflective sheet laminate and the light guide plate are in close contact with each other. Includes clamps to hold.

In addition, the reflective sheet laminate is characterized in that it is formed by combining the rear base plate and the reflective sheet into one.

In addition, the clamp is formed in a T-shaped uneven structure having an empty space therein, and the LED module is placed and fixed inside the T-shaped head, and the reflection is inside the T-shaped body. It characterized in that the sheet laminate and the light guide plate are arranged and fixed in close contact.

In addition, the clamp may further include a blocking protrusion formed to protrude from a portion connecting the inside of the head portion and the inside of the body portion to block the leakage of light emitted from the LED module.

In addition, the clamp is characterized in that it further comprises a protrusion portion formed in a protrusion structure to increase the heat radiation effect.

In addition, the protrusion may include a plurality of first protrusions protruding to a predetermined height and at least one second protrusion formed between the plurality of first protrusions and protruding higher than the first protrusion. .

The flat panel lighting device equipped with the LED module of the present invention is designed in a separate structure of the clamp assembled to the LED module, the light guide plate, and the reflective sheet laminated to the light guide plate as much as possible to receive the flow of light emitted from the LED module. Diffusion loss can be minimized by separating the light guide plate. Through this, light efficiency can be increased.

In addition, by simplifying the structure, it is possible to minimize assembly and reduce the weight, thereby lowering the manufacturing cost and installation cost.

1 is a view for explaining a flat panel lighting apparatus according to an embodiment of the present invention.
2 is a cross-sectional view for explaining the structure of a flat lighting device according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating an actual implementation of FIG. 2.
4 is a cross-sectional view illustrating a structure of a flat panel lighting device according to another embodiment of the present invention.
5 is a cross-sectional view illustrating a structure of a flat panel lighting device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to elements of each drawing, it should be noted that the same elements have the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function is apparent to those skilled in the art or may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a view for explaining a flat panel lighting device according to an embodiment of the present invention, Figure 2 is a cross-sectional view for explaining the structure of the flat panel lighting device according to an embodiment of the present invention, and Figure 3 is It is a drawing to explain the implementation.

1 to 3, the flat panel lighting device 100 is a lighting device having a flat plate structure, thereby increasing light efficiency, minimizing assembly properties and weight, thereby lowering manufacturing cost and installation cost. The flat panel lighting apparatus 100 includes a frame 10, an LED module 20, a reflective sheet laminate 30, a light guide plate 40, a diffusion plate 50, and a clamp 60.

The frame 10 is installed on the ceiling and is formed in a flat plate structure. In this case, the frame 10 may be formed in a rectangular shape, but is not limited thereto. The frame 10 corresponds to the skeleton of the flat lighting device 100 and serves to support each component. The frame 10 can be lightened in a state that can withstand the load for each component. That is, the frame 10 may have an empty space inside the frame 10 rather than a full inside shape. In addition, the frame 10 may be formed of a non-conductive material, and preferably may include plastic, wood, or the like. Here, the frame 10 may further include a side cap 11, a hinge panel 13, and a bracket 15.

The side cap 11 includes a plurality, and is installed at each corner of the frame 10 so that the frame 10 can be fixed. When the frame 10 has a square shape, the side cap 11 includes four, and each of the side caps 11 may be installed at a corner portion of the frame 10.

The hinge panel 13 includes a plurality, and is connected to the reflective sheet laminate 30 to support the frame 10 to be installed on the ceiling. Here, one hinge panel 13 may be installed on the ceiling through a plurality of bolts. Here, the hinge panel 13 may be installed in a symmetrical position to distribute the load transmitted to the ceiling.

The bracket 15 is connected to the reflective sheet laminate 30 while supporting the SMPS (Switching Mode Power Supply) that supplies power to the LED module 20 so that the frame 10 can be installed on the ceiling. Here, the bracket 15 is disposed in the center of the reflective sheet laminate 30 and may be installed on the ceiling through a plurality of bolts.

The LED module 20 is installed inside the frame 10. The LED module 20 emits light generated from the flat lighting device 100. At this time, the LED module 20 may be installed to be integrally assembled with the clamp 60. In the LED module 20, a plurality of LEDs are installed on a PCB (Printed Circuit Board) substrate at regular intervals to emit light. Here, the LED module 20 may set the brightness of light to suit the environment in which the flat panel lighting device 100 is used.

The reflective sheet laminate 30 is installed so as to contact the LED module 20 in the frame 10. The reflective sheet laminate 30 is formed by combining a rear base plate and a reflective sheet into one. Due to this, the reflective sheet laminate 30 can perform both the function of the rear base plate and the function of the reflective sheet. That is, the reflective sheet laminate 30 may serve as a rear base plate surrounding the lower side of the frame 10 and a reflective sheet for reflecting light emitted from the LED module 20. At this time, the reflective sheet laminate 30 is formed by forming a rear base plate and a reflective sheet in one configuration in a separate configuration, so that the flow of light emitted from the LED module 20 can be maximally incident on the light guide plate 40, and is assembled. It can reduce weight while minimizing performance.

The light guide plate 40 is installed to come into contact with the reflective sheet laminate 30 in the frame 10. In detail, the light guide plate 40 may be installed such that the rear surface is in contact with the reflective sheet laminate 30. The light guide plate 40 distributes the light reflected from the reflective sheet laminate 30 to the entire area. At this time, the light guide plate 40 may be in close contact with the reflective sheet laminate 30 to receive light emitted from the LED module 20 to the maximum. Through this, the light guide plate 40 may have a thickness of 1.5t to 3.0t, and preferably 2.0t to 2.5t. In other words, the light guide plate 40 receives light in close contact with the reflective sheet paper 30 unlike in the related art, thereby reducing the weight by reducing the thickness of the light guide plate. In addition, the light guide plate 40 may have a predetermined pattern (not shown) for inducing a path and scattering of light. For example, the pattern may be implemented by forming V-grooves, uneven grooves, uneven protrusions or print protrusions on the acrylic plate.

The diffusion plate 50 is installed so as to be spaced apart from the light guide plate 40 in the interior of the frame 10. The diffusion plate 50 diffuses the light scattered from the light guide plate 40. Here, as the diffusion plate 50 is separated from the light guide plate 40, light incident on the side of the diffusion plate 53 is blocked, and light leakage is prevented to minimize diffusion loss. In particular, the diffuser plate 50 does not appear in the emitting portion even if a handprint, scratch, or fine dust inflow occurs during product assembly through a space spaced apart from the light guide plate 40, thereby improving productivity. The diffusion plate 50 may be implemented in various forms. For example, the diffusion plate 50 is implemented with a transparent thermoplastic resin and a low-molecular liquid crystal, a combination of polyvinyl alcohol and a low-molecular liquid crystal, or includes a diffusing agent or a light absorbing material in acrylic, or by forming a fine pattern. Can be implemented.

The clamp 60 is installed to be assembled integrally with the LED module 20 in the frame 10. At this time, the clamp 60 fixes the reflective sheet paper 30 and the light guide plate 40 so that they are in close contact with each other. The clamp 60 may be formed in a T-shaped uneven structure having an empty space therein. The clamp 60 is fixed by arranging and fixing the LED module 20 inside the T-shaped head, and by placing the reflective sheet paper 30 and the light guide plate 40 inside the T-shaped body. At this time, the diffusion plate 50 may be arranged to be in contact with the outside of the T-shaped body portion and may be spaced apart from the light guide plate 40 by the thickness of the clamp 60. The clamp 60 may perform a heat dissipation function in addition to the fixing function. That is, the clamp 60 may serve to dissipate heat generated from the LED module 20 to the outside. Here, the clamp 60 may be formed of a metal to increase the heat dissipation effect, and preferably may be formed of an aluminum material.

4 is a cross-sectional view illustrating a structure of a flat panel lighting device according to another embodiment of the present invention.

1 to 4, the flat panel lighting apparatus 100 may further include a protrusion 61 in the clamp 60 to increase the heat dissipation effect. That is, the clamp 60 may further include a protrusion 61 formed in a protruding structure in a part. Here, some of the clamps 60 may be the other surface opposite to one surface in contact with the reflective sheet laminate.

The protrusion 61 includes a first protrusion 63 and a second protrusion 65. The first protrusion 63 includes a plurality of and has a shape protruding at a predetermined height. The second protrusion 65 is formed between the plurality of first protrusions 63 and protrudes higher in height than the first protrusion 63. At this time, the second protrusion 65 may include at least one.

Through the above-described shape, the protrusion 61 can maximize the heat dissipation effect. That is, the protrusion 61 may smoothly induce heat dissipation through the first protrusion 63 and the second protrusion 65 to discharge heat generated from the LED module 20 to the outside.

5 is a cross-sectional view illustrating a structure of a flat panel lighting device according to another embodiment of the present invention.

1, 2, and 5, the flat panel lighting apparatus 100 may improve light leakage. That is, the clamp 60 may further include a blocking protrusion 67 that blocks the leakage of light emitted from the LED module 20.

The blocking protrusion 67 is formed to protrude from a portion of the clamp 60 that connects the inside of the T-shaped head and the inside of the body. Preferably, the blocking protrusion 67 protrudes so that the end of the protrusion comes into contact with a part of the light guide plate 40 so that the upper end of the reflective sheet laminate 30 is generated due to a fine tolerance between the reflective sheet laminate 30 and the light guide plate 40 It can block light leakage phenomenon.

For example, when the package of the LED module 20 is larger than the thickness of the light guide plate 40, the reflective sheet laminate 30 cannot be formed to cover the LED module 20 as shown in FIG. 2, so that a light leakage phenomenon occurs. However, the flat panel lighting device 100 may minimize light loss by blocking such a light leakage phenomenon through the blocking protrusion 67.

As described above, the flat panel lighting device 100 is designed to separate the clamp 60, the light guide plate 40, and the reflective sheet laminate 30, which are assembled integrally with the LED module 20, from the LED module 20. It is possible to minimize the diffusion loss by allowing the flow of emitted light to enter the light guide plate 40 as much as possible, and spaced apart the diffusion plate 50 and the light guide plate 40. Through this, the flat panel lighting device 100 may improve light efficiency. In addition, the flat panel lighting device 100 can reduce the manufacturing cost and installation cost by simplifying the structure and minimizing the assembling property and reducing the weight.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific preferred embodiments described above, and without departing from the gist of the present invention claimed in the claims, in the technical field to which the present invention pertains. Anyone of ordinary skill in the art can implement various modifications, as well as such modifications will be within the scope of the claims.

10: frame
11: side cap
13: hinge panel
15: bracket
20: LED module
30: reflective sheet lamination
40: light guide plate
50: diffuser plate
60: clamp
61: protrusion
63: first protrusion
65: second protrusion
67: blocking protrusion
100: flat panel lighting device

Claims (6)

A frame installed on the ceiling and formed in a flat plate structure;
An LED module installed inside the frame and emitting light;
A reflective sheet laminate installed in the frame to contact the LED module and reflect the light;
A light guide plate installed to be in contact with the reflective sheet laminate in the frame and dispersing the reflected light over the entire area;
A diffuser plate installed to be spaced apart from the light guide plate in the interior of the frame and diffuse the scattered light; And
A clamp installed to be assembled with the LED module in the interior of the frame, and fixing the reflective sheet laminate and the light guide plate to be in close contact with each other;
Flat panel lighting device with an LED module comprising a. The method of claim 1,
The reflective sheet laminate,
Flat panel lighting device with an LED module, characterized in that formed by combining the rear base plate and the reflective sheet into one. The method of claim 1,
The clamp,
It is formed in a T-shaped uneven structure having an empty space inside, and the LED module is arranged and fixed inside the T-shaped head, and the reflective sheet laminate and the light guide plate are inside the T-shaped body part. Flat panel lighting device with an LED module, characterized in that by placing and fixing in close contact. The method of claim 3,
The clamp,
A blocking protrusion protruding from a portion connecting the inside of the head portion and the inside of the body portion to block the leakage of light emitted from the LED module;
Flat panel lighting apparatus with an LED module, characterized in that it further comprises. The method of claim 1,
The clamp,
A protrusion formed in a portion of the protrusion structure to increase the heat dissipation effect;
Flat panel lighting apparatus with an LED module, characterized in that it further comprises. The method of claim 5,
The protrusion,
A plurality of first protrusions protruding at a constant height; And
At least one second protrusion formed between the plurality of first protrusions and protruding higher in height than the first protrusion;
Flat panel lighting apparatus with an LED module, characterized in that it comprises a.

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