KR20090030469A - Side-emitting lighting - Google Patents

Abstract

The side-emitting lighting apparatus includes a first frame, a second frame, a printed circuit board, light emitting devices, a light guide plate, and a diffusion plate. The first frame has an exit surface from which light is emitted. The second frame is coupled to the bottom of the first frame. The printed circuit board is disposed at sides of the first frame and the second frame. The light emitting devices are arranged on the printed circuit board to irradiate light along a direction parallel to the emission surface. The light guide plate is disposed on the second frame to guide the light to the exit surface. A diffuser plate is disposed on the light guide plate and supported by the first frame to diffuse the light.

Description

Side-emitting lighting device {ILLUMINATOR}

The present invention relates to a side-emitting lighting apparatus, and more particularly to a side-emitting lighting apparatus having a light emitting device as a light source.

In general, the light emitting device has a structure in which a p-type semiconductor and an n-type semiconductor are bonded to each other. A light emitting device is a photoelectronic device that emits energy corresponding to a band gap of a semiconductor as light by applying a voltage to the light emitting device by combining electrons and holes. Such a light emitting device is used in a light source for a backlight unit of a liquid crystal display device, a light source for an electronic board, a light source for an illumination device, a light source for a traffic signal, and the like, and is gradually expanded.

The lighting apparatus includes light emitting elements as a light source, a printed circuit board on which the light emitting elements are arranged, a frame accommodating the printed circuit board, and a diffuser plate coupled to the frame to uniformly diffuse light generated by the light emitting element. On the other hand, the lighting device may be classified into a side emitting type and a direct emitting type according to the positions of the light emitting elements.

In the side-emitting lighting device, the light emitting elements are arranged on the side of the housing. Accordingly, the side-emitting lighting apparatus further includes a light guide plate for guiding light from the side of the frame to the center, and a reflecting plate for reflecting light leaking down the light guide plate.

On the other hand, in the direct emission type lighting device, the light emitting elements are arranged under the frame. Therefore, since light is emitted directly to the front of the frame, it is not necessary to include the light guide plate, the reflecting plate, and the like in the direct light emitting lighting device.

In a conventional side-emitting illumination device, the frame consists of one piece. For this reason, the light guide plate, the reflecting plate, and the like can only be assembled to the frame in the horizontal direction through the side of the frame. Since the light guide plate and the reflecting plate have a very long length and heavy weight, the horizontal assembly method has been a very difficult task for the worker. In particular, during the entry of the light guide plate and the reflecting plate into a narrow slot formed in the frame, accidents in which the light guide plate and the reflecting plate collide with the frame and damage the expensive light guide plate and the reflecting plate are frequently occurred.

The present invention provides a side-emitting lighting device that can be applied to the vertical assembly method.

According to an aspect of the present invention, a side-emitting lighting apparatus includes a first frame, a second frame, a printed circuit board, light emitting devices, a light guide plate, and a diffusion plate. The first frame has an exit surface from which light is emitted. The second frame is coupled to the bottom of the first frame. The printed circuit board is disposed at sides of the first frame and the second frame. The light emitting devices are arranged on the printed circuit board to irradiate light along a direction parallel to the emission surface. The light guide plate is disposed on the second frame to guide the light to the exit surface. A diffuser plate is disposed on the light guide plate and supported by the first frame to diffuse the light.

According to an embodiment of the present invention, the first frame has a first guide for setting the coupling position of the second frame, and the first frame has a second guide for setting the coupling position of the diffusion plate. Can be. In addition, the first frame may have a support for pressing and supporting the diffusion plate from above, and the support may be positioned higher than the surface of the first frame.

According to another embodiment of the present invention, the second frame is a heat sink facing the rear surface of the light emitting unit facing the first frame, a third guide for setting the coupling position of the light emitting unit, a plurality of heat radiation fins, and It may have a slot through which a wire for supplying current to the light emitting unit passes.

In addition, the heat dissipation fins may have heights that gradually increase along the direction of the light guide plate from the light emitting devices. The second frame portion having the heat dissipation fins may have a thickness that gradually decreases in the direction in which the light guide plate is positioned from the light emitting devices.

According to another embodiment of the present invention, the printed circuit board may have a plurality of heat dissipation holes.

In addition, the side-emitting lighting apparatus may further include a reflecting plate interposed between the second frame and the light guide plate, and a supporting plate interposed between the reflecting plate and the second frame.

According to the present invention as described above, the frame consists of a first frame and a second frame. Therefore, the light guide plate, the reflecting plate, and the like can be arranged on the second frame along the vertical direction, and then the first frame can be assembled to the second frame. As a result, the assemblability of the side-emitting lighting apparatus can be greatly improved.

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

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements.

Terms such as first and second may be used to describe various components, but the components should not be 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 terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, 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, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

1 is a perspective view showing a side-emitting lighting apparatus according to the present invention, Figure 2 is an exploded perspective view showing a side-emitting lighting apparatus of Figure 1, Figure 3 is a cross-sectional view taken along the line III-III 'of FIG. 4 is an enlarged cross-sectional view of the first frame of FIG. 3, FIG. 5 is an enlarged cross-sectional view of the second frame of FIG. 3, and FIG. 6 is a plan view of the printed circuit board of FIG. 3.

1 to 6, the side-emitting lighting apparatus 100 according to the present invention includes a first frame 110, a second frame 120, a printed circuit board 130, light emitting devices 140, The support plate 150, the reflecting plate 160, the light guide plate 170, and the diffusion plate 180 are included.

The first frame 110 has a substantially rectangular frame shape to define an emission surface from which light generated from the light emitting device 140 is emitted. In addition, the first frame 110 has a substantially rectangular parallelepiped shape. A first guide 112 for guiding the engagement position of the second frame 120 is formed vertically downward from the lower end of the outer surface of the first frame 110.

The first frame 110 has a support 114 that presses and supports the diffuser plate 180 from above. In this embodiment, the support 114 protrudes from the upper end of the inner side of the first frame 110 and extends horizontally toward the diffuser plate 180 again. Therefore, since the support part 114 is positioned higher than the surface of the first frame 110, a step is formed between the support part 114 and the first frame 110. Since the outer portion of the support part 114 is an empty space, the thickness of the first frame 110 can be reduced by a thickness corresponding to the empty space. Additionally, in order to make the first frame 110 appear thinner in appearance, a slot 118 may be formed along the length of the first frame 110 on the surface of the first frame 110.

In addition, a second guide 116 for guiding the coupling position of the diffusion plate 180 is formed on the bottom surface of the support part 114. Accordingly, a space is formed between the second guide 116 and the inner surface of the first frame 110, and the printed circuit board 130 is disposed in the space.

The second frame 120 is guided by the first guide 112 to contact the bottom surface of the first frame 110. In particular, an outer portion of the second frame 120 contacts the bottom surface of the first frame 110. The second frame 120 has a heat sink 122 that abuts against the inner side surface of the first frame 110. The heat sink 120 is opposed to the rear surface of the printed circuit board 130 guided by the second guide 116, thereby dissipating the high heat generated in the printed circuit board 130. A third guide 124 for guiding the bonding position of the printed circuit board 130 and the light guide plate 170 is formed on the surface portion of the second frame 120 corresponding to the second guide 116. That is, the straight line connecting the second guide 116 and the third guide 124 becomes a vertical line.

A plurality of heat dissipation fins 126 are formed on the bottom surface of the central portion of the second frame 120. The heat dissipation fins 126 extend the heat dissipation area of the second frame 120, thereby improving heat dissipation efficiency of the second frame 120. In this embodiment, the heat dissipation fins 126 have heights gradually increasing along the exit surface direction from the printed circuit board 130. Here, in order to prevent the thickness of the second frame 120 from gradually increasing due to the heat radiation fins 126, the thickness of the second frame 120 is gradually reduced from the printed circuit board 130 along the exit surface direction. .

Therefore, the high heat generated in the printed circuit board 130 may be emitted to the outside through the heat sink 122 and the first frame 110. In addition, the high heat may be quickly released to the outside through the heat sink 122, the second frame 120 and the heat radiation fins (126).

In addition, slots 128 for receiving electric wires for supplying current to the light emitting devices 140 may be formed in the bottom surface of the inner side of the second frame 120.

The printed circuit board 130 is disposed in a space defined by the heat sink 122, the second guide 116, and the third guide 124. Accordingly, the upper end of the front surface of the printed circuit board 130 is opposed to the second guide 116, and the lower end of the front surface of the printed circuit board 130 is against the third guide 124. In addition, the entire rear surface of the printed circuit board 130 abuts the heat sink 122. Here, the side-emitting illumination device 100 according to the present invention is a side-emitting type, in particular both side-emitting type. Therefore, two printed circuit boards 130 are disposed on both sides of the first frame 110 and the second frame 120.

The light emitting devices 140 are arranged on the front surface of the printed circuit board 130. In order to more effectively discharge the high heat generated in the light emitting device 140 from the printed circuit board 130, a plurality of heat dissipation holes 132 are formed through the printed circuit board 130.

The support plate 150 is disposed on the second frame 120. Both sides of the support plate 150 abut against the third guide 124.

The reflector plate 160 is disposed on the support plate 150. Both sides of the reflecting plate 160 also face the third guide 124. The reflecting plate 160 reflects the light from the light emitting element 140 to the light guide plate 170 toward the bottom of the light guide plate 170 in the emission plane direction, thereby improving the light efficiency of the side-emitting lighting device 100. Do it.

The light guide plate 170 is disposed on the reflective plate 160. Therefore, both side surfaces of the light guide plate 170 are disposed adjacent to the light emitting devices 140. The light guide plate 170 guides the light generated by the light emitting element 140 to the emission surface. Lower ends of both side surfaces of the light guide plate 170 may face the third guide 124.

The diffusion plate 180 is disposed on the light guide plate 160. The diffuser plate 180 serves to uniformly diffuse the light guided into the light guide plate 160. Both sides of the diffuser plate 180 abut against the second guide 116. In addition, the support part 114 presses and supports the surface of the diffuser plate 180.

Hereinafter, the operation of assembling the side-emitting lighting device 100 according to the present invention configured as described above in detail.

First, the printed circuit board 130 on which the light emitting devices 140 are arranged is disposed to face the heat sink 122 of the second frame 120. Thereafter, the supporting plate 150, the reflecting plate 160, the light guide plate 170, and the diffusion plate 180 are sequentially disposed on the second frame 120. Here, the supporting plate 150, the reflecting plate 160, and the light guide plate 170 are supported by the third guide 124.

That is, the supporting plate 150, the reflecting plate 160, the light guide plate 170, and the diffusion plate 180 may be disposed along the vertical direction. Therefore, the operation of assembling the weight supporting plate 150, the reflecting plate 160, the light guide plate 170, and the diffusion plate 180 becomes very easy. In particular, as will be described later, since the first frame 110 is later assembled, the expensive support plate 150, the reflecting plate 160, the light guide plate 170, and the diffusion plate 180 collide with the first frame 110. Accidents can be fundamentally prevented.

Finally, the first frame 110 is superimposed on the second frame 120 to combine the first frame 110 and the second frame 120. Here, the inner surface of the first frame 110 abuts the heat sink 122. The outer end of the second frame 120 is against the first guide 112. In addition, the light guide plate 170 and the diffusion plate 180 are supported by the second guide 116. The support part 114 presses and supports the surface of the diffusion plate 180.

As described above, according to a preferred embodiment of the present invention, the frame consists of a first frame and a second frame. Therefore, the light guide plate, the reflecting plate, and the like can be arranged on the second frame along the vertical direction, and then the first frame can be assembled to the second frame. As a result, the assemblability of the side-emitting lighting apparatus can be greatly improved. In addition, an accident in which an expensive light guide plate and a reflecting plate may be damaged may be prevented.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

1 is a perspective view showing a side-emitting lighting apparatus according to the present invention.

FIG. 2 is an exploded perspective view of the side-emitting lighting apparatus of FIG. 1.

3 is a cross-sectional view taken along the line III-III ′ of FIG. 1.

4 is an enlarged cross-sectional view of the first frame of FIG. 3.

FIG. 5 is an enlarged cross-sectional view of the second frame of FIG. 3.

FIG. 6 is a plan view illustrating the printed circuit board of FIG. 3.

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

110: first frame 120: second frame

130: printed circuit board 140: light emitting device

150: support plate 160: reflector

170: Light guide plate 180: Diffusion plate

Claims (14)

A first frame having an exit surface from which light is emitted; A second frame coupled to a lower portion of the first frame; A printed circuit board disposed at sides of the first frame and the second frame; Light emitting devices (LEDs) arranged on the printed circuit board to irradiate light along a direction parallel to the emission surface; A light guide plate disposed on the second frame to guide the light to an emission surface; And And a diffuser plate disposed on the light guide plate and supported by the first frame to diffuse the light. The side-emitting lighting apparatus of claim 1, wherein the first frame has a first guide for setting an engagement position of the second frame. The side-emitting lighting apparatus according to claim 1, wherein the first frame has a second guide for setting an engagement position of the diffusion plate. The side-emitting lighting apparatus according to claim 1, wherein the first frame has a support for pressing and supporting the diffusion plate from above, and the support is positioned higher than the surface of the first frame. The side-emitting lighting apparatus according to claim 1, wherein the second frame has a heat sink that is opposed to a rear surface of the light emitting unit facing the first frame. The side-emitting lighting apparatus according to claim 1, wherein the second frame has a third guide for setting a coupling position of the light emitting unit. The side-emitting lighting device of claim 1, wherein the second frame has a plurality of heat dissipation fins. The side-emitting lighting apparatus of claim 7, wherein the heat dissipation fins have heights gradually increasing from the light emitting elements along the light guide plate. The side light emitting lighting device according to claim 8, wherein the second frame portion in which the heat dissipation fins are formed has a thickness gradually decreasing from the light emitting elements along the light guide plate. The side-emitting lighting apparatus according to claim 1, wherein the second frame has a slot through which an electric wire for supplying current to the light emitting unit passes. The side-emitting lighting apparatus of claim 1, wherein the printed circuit board has a plurality of heat dissipation holes. The side-emitting illumination device of claim 1, further comprising a reflector interposed between the second frame and the light guide plate. The side-emitting lighting apparatus of claim 12, further comprising a support plate interposed between the reflecting plate and the second frame. A first frame having an exit surface from which light is emitted and having a first guide and a second guide; A second frame supported by the first guide and coupled to a lower portion of the first frame and having a heat sink, a third guide, and a plurality of heat dissipation fins that are opposed to the first frame; A printed circuit board supported by the second guide and the third guide and disposed on a side of the exit surface, the printed circuit board facing the heat sink; A plurality of light emitting elements arranged on the printed circuit board to generate the light; A support plate disposed on the second frame; A reflection plate disposed on the support plate to reflect the light to an emission surface; A light guide plate disposed on the reflection plate to guide the light to an emission surface; And And a diffuser plate disposed on the light guide plate and supported by the second guide to diffuse the light.

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