KR20120069837A - Lighting module - Google Patents

Abstract

PURPOSE: A lighting module is provided to improve the availability of a space by bi-directionally emitting light. CONSTITUTION: A first case(200a) and a second case(200b) cover the side of a light guide plate(110). The first case and the second case include a base unit and a flange unit which is vertically extended from the base unit. A first light source(150a) and a second light source(150b) are arranged in the first case and the second case. The first light source and the second light source includes light emitting devices(152a,152b) arranged on the substrate. A diffusion plate(130a,130b) is arranged on the upper or lower side of the light guide plate.

Description

Lighting module {LIGHTING MODULE}

Embodiments relate to a lighting module.

In general, a lot of bulbs or fluorescent lights are used as indoor or outdoor lighting, such a bulb or fluorescent lamp has a short life and has to be replaced frequently. In addition, the conventional fluorescent lamp has a problem that excessively decreases the illuminance due to deterioration over the use time.

In order to solve this problem, a light emitting diode (LED), which has excellent controllability, fast response speed, high electro-optical conversion efficiency, long life, low power consumption, high brightness, and emotional lighting, is used. Various types of lighting modules have been developed.

Among them, there is a lighting module developed in the bar type as shown in FIG. 1 is a cross-sectional view showing a partial configuration of such a bar type lighting module.

As shown in FIG. 1, a typical bar type lighting module includes a case 20, a light source unit formed inside the case 20, and heat radiating pads 54a and 54b formed between the light source unit and the case 20. Include. The light source unit includes a plurality of light emitting diodes 52a and 52b formed on the substrates 51a and 51b.

On the other hand, the light guide plate 10 for emitting light incident from the light source unit to the outside is formed in the case 20. A reflection plate 30 is formed on the light guide plate 10 to reflect light toward the top of the light guide plate 10 and to direct the light downwardly, and a pattern layer 11 is formed between the light guide plate 10 and the reflection plate 30. The pattern layer 11 plays a role of changing, scattering, or diffusing a path of light. In addition, one or more diffusion layers 90 are formed under the light guide plate 10. The diffusion layer 90 functions to convert the point light source into a surface light source by diffusing the light emitted from the lower portion of the light guide plate 10.

When the bar type lighting module emits light in only one direction and requires lighting in a large space, a large number of lighting modules are required. Therefore, a structural design change of the lighting module is required.

Embodiments provide a lighting module having a simplified configuration and capable of enlarging a light emitting area with a minimum area.

According to an embodiment, the lighting module comprises a light guide plate; First and second cases covering side portions of the light guide plate; And first and second light source portions disposed inside the first and second cases, wherein the first and second cases comprise a base portion on which the first and second light source portions are disposed, and perpendicular to the base portion. And a flange portion extending in the direction.

According to an embodiment, the lighting module comprises a case; A light source unit disposed in the case; And a light guide plate having a side portion optically coupled to the light source portion. And a film converting the wavelength of light emitted from the light source unit between the light source unit and the light guide plate.

Further, according to the embodiment, the lighting module comprises a first light guide plate; A reflection plate disposed on the first light guide plate; A second light guide plate disposed on the reflecting plate; A first light source unit and a second light source unit optically coupled to sides of each of the first light guide plate and the second light guide plate; And a case disposed with the first light source part and the second light source part and covering side portions of the first and second light guide plates, and a reflective plate disposed between the first light guide plate and the second light guide plate or under the first light guide plate. do.

According to an embodiment, the lighting module comprises a case; First and second light source units disposed inside the case; And first and second light guide plates having side portions optically coupled to the first and second light source portions. The first LGP emits light incident from the first light source part in one direction of the first LGP, and the second LGP emits light incident from the second light source part in a direction different from one direction of the first LGP. Release.

According to the embodiment, it is possible to provide a lighting module that can emit light in both directions instead of one direction to increase the utilization of the space.

1 is a view for explaining the configuration of a conventional lighting module.
2 is a perspective view for explaining the structure of a lighting module according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a structure of a lighting module according to an embodiment of the present invention.
Figure 4 is an embodiment according to the present invention, a cross-sectional view for explaining the structure of the case.
5 is a cross-sectional view for explaining a lighting module according to another embodiment of the present invention.

In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not necessarily reflect the actual size.

In addition, in the description of the embodiment according to the present invention, when described as being formed on an "on or under" of each substrate, the (top) or (bottom) On or under includes both two same substrates directly contacted with each other or one or more other substrates are formed indirectly between the same substrates. In addition, when expressed as “on” or “under”, it may include the meaning of the downward direction as well as the upward direction based on one substrate.

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

2 is a perspective view for explaining the structure of a lighting module according to an embodiment of the present invention, Figure 3 is a cross-sectional view for explaining the structure of a lighting module according to an embodiment of the present invention.

2 and 3, the lighting module 400 includes a first case 200a, a second case 200b, a first light source unit 150a, a second light source unit 150b, and a first light excitation film 170a. ), A second light excitation film 170b, a light guide plate 110, and diffusion plates 130a and 130b.

The first case 200a and the second case 200b are manufactured by being extruded in a single plate shape without a plurality of flanges assembled and connected. The first case 200a and the second case 200b each have the first and second seating portions 202a and 202b on which the plate is bent twice so that the light source portions 150a and 150b shown in FIG. 4 can be disposed. Is formed. The first case 200a and the second case 200b have a consistent cross section in which both sides are parallel in the longitudinal direction of the case.

The first light source unit 150a and the second light source unit 150b include substrates 151a and 151b and light emitting elements 152a and 152b disposed on the substrate, respectively, and one surface of the substrate on which the light emitting elements are disposed The first and second seats 202a and 202b of the first case 200a and the second case 200b are inserted to face each other.

The substrates 151a and 151b may include a printed circuit board (PCB), a metal core PCB (MCPCB), a flexible printed circuit board (FPCB), or a ceramic substrate. .

The light emitting device included in the first light source unit 150a and the second light source unit 150b is a light emitting device that emits light having the same color, but may emit light having a different color. Therefore, a variety of colors can be made of a combination of two different colors can be implemented emotional lighting device. The light emitting elements 152a and 152b may be light emitting diodes emitting at least one of blue, red, and green light.

Although not shown in the figure, the light emitting element can emit light having its own color by causing the translucent resin to seal the light emitting element thereon, but when emitting the original color, for example, In the case of a blue light emitting diode, the phosphor included in the translucent resin is at least one of Garnet-based (YAG, TAG), Silicate-based, Nitride-based and Oxynitride-based. It may include.

Natural light (white light) may be realized by including only the yellow phosphor in the light-transmissive resin, but may further include a green phosphor or a red phosphor in order to improve the color rendering index and reduce the color temperature.

In addition, when various kinds of phosphors are mixed in the light-transmissive resin, the addition ratio according to the color of the phosphor may use a green phosphor more than a red phosphor and a yellow phosphor more than a green phosphor.

Yellow phosphors include garnet-based YAG, silicate and oxynitrides, green phosphors use silicate and oxynitrides, and red phosphors use nitrides. have.

In addition to mixing various kinds of phosphors in the light-transmissive resin, a layer having a red phosphor, a layer having a green phosphor, and a layer having a yellow phosphor may be separately divided.

The light emitting device may be a horizontal type or a vertical type, and the light emitting device may emit blue, red, yellow, or green.

The light guide plate 110 is disposed in the direction of the light path emitted from the first light source unit 150a and the second light source unit 150b. That is, the light guide plate 110 is optically coupled to the light source units 150a and 150b and is inserted into the case in the length direction of the cases 200a and 200b. At this time, both ends of the light guide plate 110 are inserted into the first and second seating portions 202a and 202b of the first case 200a and the second case 200b, respectively, The lower surface is exposed to the outside, and the light emitted from the first light source unit 150a and the second light source unit 150b is emitted outward in the upper and lower directions of the light guide plate 110.

The light guide plate 110 is an acrylic resin-based, such as polymethyl metaacrylate (PMMA), polyethylene terephthlate (PET), polycarbonate (PC), cycloolefin copolymer (COC), and polyethylene naphthalate (PEN) in consideration of thermal expansion according to a use temperature. It is preferable to form using resin or the like.

The first light excitation film 170a and the second light excitation film 170b are respectively disposed between the light guide plate 110, the first light source part 150a, and the second light source part 150b, and include various fluorescent materials therein. . The first light excitation film 170a and the second light excitation film 170b may convert a color of light by converting a part of wavelengths of the light emitted from the first light source unit 150a and the second light source unit 150b.

Although not shown in the drawing, the first photoexcitation film 170a and the second photoexcitation film 170b include a transparent resin and a fluorescent material contained in the transparent resin. A curing agent or an additive may be included in the transparent resin, the curing agent cures the transparent resin, and the additive evenly disperses the fluorescent material in the transparent resin. In addition, a diffusion material may be included in the transparent resin, and the diffusion material improves the refractive index of the light source to increase the excitation rate of the fluorescent material.

The diffusion plates 130a and 130b are disposed on one or both of the upper and lower portions of the light guide plate 110 to diffuse and emit light emitted from the light guide plate 110 to the outside, and the diffusion plates 130a and 130b. ) Is inserted into the first case 200a and the second case 200b. In this case, both ends of the diffusion plates 130a and 130b are inserted into the first and second seating parts 202a and 202b of the cases 200a and 200b.

In this case, a reflecting plate (not shown) may be disposed below the diffusion plate 130a disposed below the light guide plate 110 or instead of the diffusion plate 130a to reflect light incident on the light guide tube to be emitted upward.

In such a lighting module, the light emitted from the light source unit disposed at the side of the light guide plate is emitted in the upper and lower directions of the light guide plate. Therefore, the conventional irradiation direction of light has a large irradiation area in both directions, unlike the irradiation direction of only one direction in the upper or lower direction.

Figure 4 is an embodiment according to the present invention, a cross-sectional view for explaining the structure of the case.

As shown, the first case 200a and the second case 200b are perpendicular to both end portions of the base portions 210a and 210b and the base portions 210a and 210b on which the first and second light sources are disposed, respectively. And flange portions 230a and 230b extending to each other.

Accordingly, each of the cases 200a and 200b has first and second seating portions 202a and 202b formed therein, and the first and second seating portions 202a and 202b have side portions of the light guide plate 110. It is inserted and fixedly supported.

The flange portions 230a and 230b have one or more protrusions 230a-1 and 230b-1 extending in a direction perpendicular to the face of the flange portion, and the protrusions have left and right light guide plates and diffuser plates inserted into the seating portions of the case. It can move in the direction to prevent the deviation, and can more stably support the above structures.

The material of the cases 200a and 200b may be a metal such as aluminum and iron, for example, and it is more preferable if the case can have elastic force.

5 is a cross-sectional view for explaining a lighting module according to another embodiment of the present invention.

As shown, the lighting module is similar to the structure of the lighting module shown in FIG. However, the number of light source parts disposed in the seating part of the case is different from the number of light guide plates optically coupled to the light source part. In addition, a reflective plate may be additionally disposed between the light guide plates, and a lens array layer such as a micro lens array may be disposed on both surfaces of the semi-finished plate.

In detail, the lighting module includes a first case 200a, a second case 200b, a first light source unit 150a, a second light source unit 150b, a third light source unit 150c, and a fourth light source unit 150d. ) First optical excitation film 170a, second optical excitation film 170b, third optical excitation film 170c, fourth optical excitation film 170d, first light guide plate 110a, second light guide plate 110b And diffusion plates 130a and 130b.

Since the structure and function of each structure have already been described, a description thereof will be omitted.

However, looking at the overall structure of the lighting module, two light source parts 150a, 150c, 150b, and 150d are disposed in the inner side of the first case 200a and the second case 200b, respectively. In addition, two light guide plates 110a and 110b corresponding to each light source unit are disposed adjacent to or in contact with each other. The reflective plate 190 may be disposed between the light guide plates 110a and 110b. Both surfaces of the reflective plate 190 may have a reflective surface, or a lens array layer may be disposed on both surfaces.

Accordingly, the light emitted from the first light source unit 150a and the second light source unit 150b is incident on the first light guide plate 110a and travels along the light path inside the first light guide plate 110a. Reflected from one surface, the light is emitted toward the upper direction of the first LGP 110a. In addition, the light emitted from the third light source unit 150c and the fourth light source unit 150d is incident on the second light guide plate 110b and travels along the light path inside the second light guide plate 110b. Reflected from the other surface, light is emitted to the lower direction of the second light guide plate 110b.

In this case, the reflective plate 190 is disposed under the second light guide plate 110b.

The light incident through the first light guide plate and the second light guide plate may be reflected to emit light upward. In this case, the diffusion plate 130a may not be installed or may be disposed between the first and second light guide plates 110a and 110b.

In this case, the light emitted from the first LGP 110a and the light emitted from the second LGP 110b may be the same or different. That is, by varying the materials of the first LGP 110a and the second LGP 110b, the amount of light emitted from the LGPs may be substantially different.

In addition, the light emitting elements 151a and 151b included in the first light source unit 150a and the second light source unit 150b and the light emitting elements 151c and 151d included in the third light source unit 150c and the fourth light source unit 150d may be used. Color temperature values can be different.

The diffusion plates 130a and 130b are disposed on at least one portion of the upper portion of the first LGP 110a or the lower portion of the second LGP 110b, and the diffusion plates 130a and 130b are emitted from the first LGP and the second LGP. The spot light of the beam can be reduced by diffusing the light to the outside.

Meanwhile, the first light source unit 150a, the second light source unit 150b, the third light source unit 150c, and the fourth light source unit 150d are arranged on the substrates 152a, 152b, 152c, and 152d. , 151b, 151c, and 151d, wherein each of the plurality of light emitting elements is arranged in a line in the longitudinal direction of the substrate.

The plurality of light emitting elements 151a, 151b, 151c, and 151d may be blue light emitting devices, but a white light emitting device having a high color rendering index (CRI) may be used if possible. The white light emitting device may be a light emitting device that realizes white by molding a synthetic resin including a yellow phosphor on the blue light emitting chip.

As described above, there are various types of light emitting devices capable of realizing white according to a color temperature. The plurality of light emitting devices used in the embodiment may include a plurality of light emitting devices 151a included in the first light source unit 150a and the second light source unit 150b. The 151b includes a warm white LED, and the plurality of light emitting devices 151c and 151d included in the third light source unit 150c and the fourth light source unit 150d are cool white LEDs. Can be arranged on each substrate.

The warm white light emitting device and the cool white light emitting device are devices that emit white light by themselves without a combination of red, green, and blue light emitting devices.

That is, in the warm white light emitting device and the cool white light emitting device, a synthetic resin including a phosphor that emits light by converting the light into a correlated color temperature corresponding to an upper portion of the blue chip is molded to realize a correlated color temperature of white.

As such, the warm white light emitting device and the cool white light emitting device may emit the correlated color temperature at each light source unit to emit the white light of the mixed light. Therefore, the color rendering index (CRI) indicating the closeness to natural sunlight is Will increase. Therefore, the color of the real object can be prevented from being distorted, and the eye fatigue of the user is reduced.

Although the above description has been made with reference to the embodiments, these are merely examples and are not intended to limit the present invention. Those skilled in the art to which the present invention pertains do not depart within the scope not departing from the essential characteristics of the present embodiments. It will be appreciated that many variations and applications are possible. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

110: light guide plate
150a: first light source unit
150b: second light source unit
170a: first optical excitation film
170b: second optical excitation film
190: reflector
200a: first case
200b: second case

Claims (14)

Light guide plate;
First and second cases covering side portions of the light guide plate; And
A first light source and a second light source disposed inside the first and second casings, the first and second casings comprising: a base part on which the first and second light sources are disposed, and a vertical direction in the base part; Lighting module comprising a flange portion extended by. The method of claim 1,
And a diffuser plate disposed on at least one of upper and lower portions of the light guide plate. The method of claim 1,
One side of the flange portion includes a lighting module including a protrusion extending in the vertical direction of the flange. The method of claim 1,
The first and second casings are respectively provided with a mounting portion formed by the base and the flange portion, the lighting module is disposed side portion of the light guide plate. case;
A light source unit disposed in the case;
A light guide plate having a side portion optically coupled to the light source portion; And a film converting wavelengths of light emitted from the light source unit between the light source unit and the light guide plate.
The light guide plate emits light incident from the light source unit to the outside of the upper and lower parts of the light guide plate. 6. The method of claim 5,
The light guide plate is any one of poly methyl methacrylate (PMMA), polyethylene teraplate (PET), polycarbonate (PC), cycloolefin copolymer (COC) and polyethylene naphthalate (PEN). A first light guide plate;
A second light guide plate disposed on the first light guide plate;
A first light source unit and a second light source unit optically coupled to sides of each of the first light guide plate and the second light guide plate;
A case in which the first light source unit and the second light source unit are disposed and cover side portions of the first and second light guide plates; And
A reflector disposed between the first LGP and the second LGP or below the first LGP;
Lighting module including 8. The method of claim 7,
The reflector is a lighting module on both sides of the reflecting surface. 8. The method of claim 7,
The reflector is a lighting module disposed lens array layer. 8. The method of claim 7,
The first light source unit includes a warm white light emitting device, and the second light source unit comprises a cool white light emitting device. 8. The method of claim 7,
And a diffuser plate disposed on at least one of a lower portion of the first LGP and an upper portion of the second LGP. case;
First and second light source units disposed inside the case; And
First and second light guide plates having side portions optically coupled to the first and second light source portions, respectively;
The first LGP emits light incident from the first light source part in one direction of the first LGP, and the second LGP emits light incident from the second light source part in a direction different from one direction of the first LGP. Emitting lighting module. 13. The method of claim 12,
And an amount of light emitted from the first LGP and the second LGP are different from each other. 13. The method of claim 12,
And an optical excitation film for converting wavelengths of light emitted from the first and second light source portions between the first light guide plate and the first light source portion and between the second light guide plate and the second light source portion, respectively.

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