KR20120131999A - Lighting module - Google Patents

Abstract

PURPOSE: A lighting module is provided to enhance the application according to space by emitting lights in both directions. CONSTITUTION: A light module comprises the first case(200a), the second case(200b), the first optical source sections(150a, 150b), the second optical source sections(150c, 150d), the first light activating films(170a, 170b), the second light activating films(170c, 170d), the first light guiding panel, the second light guiding panel, and the reflector. The case accommodates the first and the second optical course sections. The case comprises the first and the second light guiding panels that cover the first case and the second case. The light emitting opening is formed between the first case and the second case. The first case and the second case mentioned above comprise the respective lower cases(201a, 201b) and the upper cases(202a, 202b).

Description

Lighting module {LIGHTING MODULE}

An embodiment of the present invention relates 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.

The embodiment provides a lighting module having a stable coupling structure between the light guide plate and the case.

In addition, the present invention provides a lighting module that has a simplified configuration and can enlarge a light emitting area with a minimum area.

The lighting module according to the embodiment includes a light guide plate including a protrusion disposed on one surface; A light source unit optically coupled to a side of the light guide plate; And a case in which the light source unit is disposed and covers the side portion of the light guide plate, wherein the case has a receiving groove for accommodating the protrusion of the light guide plate.

According to the embodiment, it is possible to provide a lighting module having a stable coupling structure between the light guide plate and the case.

In addition, the light can be emitted in both directions instead of one direction can provide a lighting module that can increase the utilization of the space.

In addition, it is possible to provide an illumination module that can adjust the amount of light emitted in both directions.

In addition, it is possible to provide an illumination module that can adjust the light distribution characteristics of the light emitted in both directions.

1 is a cross-sectional view for explaining the structure of a lighting module according to a first embodiment of the present invention.
2 is an exploded perspective view for explaining the structure of a lighting module according to a first embodiment of the present invention.
3 is a view for explaining the coupling structure between the case and the light guide plate according to the first embodiment of the present invention.
4 is a cross-sectional view for explaining another lighting module structure according to a second embodiment of the present invention.
5 is a diagram illustrating light distribution characteristics of a lighting module according to a second exemplary embodiment of the present invention.
FIG. 7 is a view showing light distribution characteristics of an illumination module including a pattern formed on a slope of a light guide plate in a second embodiment of the present invention.
7 is a third embodiment of the present invention and is a cross-sectional view for explaining the structure of a lighting module.

The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. 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.

1 is a cross-sectional view for explaining the structure of a lighting module according to a first embodiment of the present invention, Figure 2 is an exploded perspective view for explaining the structure of the lighting module according to a first embodiment of the present invention, Figure 3 FIG. 4 illustrates a coupling structure between a case and a light guide plate according to a first embodiment of the present invention.

1 to 3, the lighting module 400 includes a first case 200a, a second case 200b, a first light source unit 150a and 150b, a second light source unit 150c and 150d, and a first light. The excitation films 170a and 170b, the second light excitation films 170c and 170d, the first light guide plate 110a, the second light guide plate 110b and the reflecting plate 190 are included.

The case accommodates the first and second light source parts 150a, 150b, 150c, and 150d, and covers the side portions of the first and second light guide plates 110a and 110b, respectively, and the first case 200a and the second case 200b. ).

An opening is formed between the first case 200a and the second case 200b to emit light in the light exit direction of the first LGP 110a and the light exit direction of the second LGP 110b.

The first case 200a and the second case 200b include lower case 201a and 201b and upper case 202a and 202b, respectively. The lower cases 201a and 201b and the upper cases 202a and 202b are coupled to each other through a screw (S) fastening.

The lower cases 201a and 201b have a base portion 201a 'and 201b' on which the light source portions 150a, 150b, 150c and 150d are disposed, and extension portions 201a 'and 201b' extending perpendicular to one surface of the base portion. It includes.

The base portions 201a 'and 201b' have coupling grooves g1 for engaging with the coupling portions 202a 'and 202b' of the upper cases 202a and 202b through screw S coupling. The coupling groove g1 does not penetrate one surface of the base parts 201a 'and 201b', which means that the base parts 201a 'and 201b' are screwed with the coupling parts 202a 'and 202b' of the upper case. This is because when a through hole is formed, not a coupling groove, the light source unit 150a, 150b, 150c, 150d disposed in the base portion by the screw may cause a loss of the light source unit due to electrical friction.

In addition, in order to drive the light source unit disposed on one surface of the base parts 201a 'and 201b', the opening part G1 is formed so that the driving driver 500 is inserted and driven at the side end in the longitudinal direction of the base part.

Although not shown in the drawings, the extension parts 201a ″ and 201b ″ may have grooves formed on one surface thereof to accommodate side ends of the light source part. That is, when the light source parts 150a, 150b, 150c, and 150d are disposed on the base parts 201a 'and 201b' of the lower case, the light source parts 150a, 150b, 150c, and 150d can be stably fixed without movement to the side ends of the light source parts. Grooves may be formed in such a direction.

In addition, the extension parts 201a ″ and 201b ″ have accommodation grooves r formed on one surface thereof. Receiving groove (r) is a projection (110b ') formed on one side of the light guide plate (110b) is accommodated to strengthen the bonding force between the extension portion (201a ", 201b") and the light guide plate (110b), at the same time of the light guide plate (110b) This is to prevent movement or departure.

The base parts 201a 'and 201b' and the extension parts 201a 'and 201b' may be connected by a plurality of flanges assembled, may form an integral form of one injection type, and the light source may be disposed on one surface of the base part. At this time, the extension portions 201a ″ and 201b ″ support the side ends of the light source portion.

The upper cases 202a and 202b include support portions 202a 'and 202b' and coupling portions 202a 'and 202b', and the support portions 202a 'and 202b' are the base portions 201a 'and 201b' of the lower case. )) And one side of the light source unit 150a, 150b, 150c, 150d and one side of the base unit 201a ', 201b') of the lower case 201a, 201b) when coupled by screw (s) fastening. It has a receiving portion (R) wrapped around.

The coupling parts 202a ″ and 202b ″ have an opening G1 and an coupling hole g2 corresponding to the opening G1 and the coupling groove g1 formed in the base part of the lower case, respectively.

The support parts 202a 'and 202b' and the coupling parts 202a 'and 202b' may also be assembled by connecting a plurality of flanges, such as a base part and an extension part, and may be integrally formed in one injection shape.

The light source unit includes first light source units 150a and 150b and second light source units 150c and 150d.

Each light source unit 150a, 150b, 150c, 150d includes substrates 151a, 151b, 151c, 151d and light emitting elements 152a, 152b, 152c, and 152d disposed on the substrate, and the light emitting elements are disposed. One surface of the substrate is disposed on one surface of the base part among the lower cases 201a and 201b of each of the first and second cases 200a and 200b.

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

Although the illustrated substrates of the first light source unit and the second light source unit are physically and electrically separated from each other, the substrates of the first light source unit and the second light source unit share a single substrate, and the light emitting element and the second light source unit included in the first light source unit The light emitting device included in may be electrically separated. In this case, the ease of a manufacturing process can be added.

The light emitting devices included in the first light source parts 150a and 150b and the second light source parts 150c and 150d may emit light having the same color, but may emit light having different colors. Therefore, a variety of colors can be made of a combination of two different colors can be implemented emotional lighting device. In addition, the light emitting devices included in the first light source parts 150a and 150b and the second light source parts 150c and 150d may have different color temperature values.

The light emitting devices 152a, 152b, 152c, and 152d 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 implementing white according to color temperature. In the light emitting devices used in the embodiment, the plurality of light emitting devices 152a and 152b included in the first light source units 150a and 150b may be warm white. A plurality of light emitting devices 152c and 152d, which are formed of a light white LED and included in the second light source units 150c and 150d, may be arranged on each substrate by being formed of cool white LEDs. have.

The warm white light emitting device and the cool white light emitting device are devices that emit white light. 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 be higher. Therefore, the color of the real object can be prevented from being distorted, and the eye fatigue of the user is reduced.

Although the number of light emitting devices included in the first light source units 150a and 150b and the second light source units 150c and 150d may be the same, the amount of light emitted to the upper and lower portions of the lighting module including different numbers of light emitting elements may be determined. You can control it differently. For example, when the amount of light emitted to the lower portion of the lighting module is greater than the amount of light emitted to the upper portion of the lighting module, the second light emitting element emits the number of light emitting elements included in the second light source unit downwardly. More than the number of light emitting elements included in the light source unit.

On the other hand, the amount of light emitted in the up and down direction of the lighting module can be adjusted by varying the current value applied to the first light source and the second light source. At this time, the light emitting elements belonging to the first and second light source units may be different, but need to be the same. For example, to increase the amount of light of any one of the light emitted in the upper and lower directions of the lighting module, the amount of light can be increased by relatively increasing the current value applied to the light source unit emitting the light.

As such, when the amount of light emitted in the upward and downward directions of the lighting module is adjusted, the lighting module may be mounted in a pendant shape in the space to utilize light according to the space.

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) can be realized by including only a yellow phosphor in the translucent resin. However, a green phosphor or a red phosphor may be further included 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.

YAG, silicate, and oxynitride systems of the garnet system may be used as the yellow phosphor, silicate system and oxynitride system may be used as the green system phosphor, and nitrides may be used as the red system phosphor. 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 includes a first light guide plate 110a and a second light guide plate 110b and is disposed in the direction of each light path emitted from the first light source parts 150a and 150b and the second light source parts 150c and 150d. That is, the first light guide plate 110a is optically coupled to the first light source portions 150a and 150b and the second light guide plate 110b to the second light source portions 150c and 150d, respectively, and the lengths of the cases 200a and 200b are respectively. It is inserted into the inside of the case. At this time, both ends of the light guide plates 110a and 110b are inserted into the first case 200a and the second case 200b, respectively, and the first light guide plate 110a faces the outside and the second light guide plate 110b) has a lower surface facing outward. Accordingly, light emitted from the first light source parts 150a and 150b is emitted toward the upper direction of the first light guide plate 110a, and light emitted from the second light source parts 150c and 150d is the second light guide plate 110b. Emitted in the downward direction of.

The first and second LGPs 110a and 110b are acrylic resins such as polymethyl metaacrylate (PMMA), polyethylene terephthlate (PET), polycarbonate (PC), and cycloolefin copolymer (COC) in consideration of thermal expansion according to the use temperature. ) And PEN (polyethylene naphthalate) resin and the like.

The reflector plate 190 is a flexible plastic material and has a rectangular plate shape corresponding to the first light guide plate 110a and the second light guide plate 110b. The reflective plate 190 may be coated with the reflective material on both surfaces thereof, or the reflective material may be coated only on the surface of the portion corresponding to the actual emission area of the light guide plates 110a and 110b.

In addition, reflecting materials coated on both surfaces of the reflecting plate 190 may have different reflectances. Accordingly, the amount of light emitted from the first LGP 110a and the second LGP 110b may be controlled differently.

In addition, the reflective plate 190 has a lens array disposed on both surfaces thereof, and the distance between adjacent lenses in the lens array disposed on one surface is different from that between neighboring lenses in the lens array disposed on the other surface. The amount of light emitted from the second LGP 110b may be controlled differently.

The reflective plate 190 is disposed between the first LGP 110a and the second LGP 110b so that the light emitted from the first light source portions 150a and 150b exits to the second LGP 110b disposed at the rear. At the same time, light emitted from the second light source parts 150c and 150d is prevented from being emitted to the first light guide plate 110a disposed in front.

On the other hand, the light guide plate (110a, 110b) is to convert the point light source generated in the light source to a surface light source, a specific pattern is formed on one surface or a coating film having a roughness may be formed so that the light incident to the inside can be emitted to the outside. have. The coating film having a specific pattern or roughness diffuses or scatters light to adjust light distribution characteristics of light emitted to the outside.

In an embodiment, different first patterns P1 and second patterns P2 are formed on the lower surface of the first LGP 110a and the upper surface of the second LGP 110b. For example, the first pattern P1 and the second pattern P2 may have different shapes, and the shape of the first pattern P1 and the second pattern P2 may be the same, but the size of the pattern The spacing between the patterns or the density formed by the patterns may be different.

When the shapes of the patterns are identical to each other, the first pattern P1 and the second pattern P2 include a plurality of dot patterns that are easy to form. Of course, it may also include a pattern having a different shape in addition to the dot pattern.

The first and second patterns P1 and P2 as described above may be formed by inkjet printing or various other methods, and a plurality of lenses may be formed on one surface of the first and second light guide plates 110a and 110b, or one surface may be a plurality of surfaces. It can appear by having a lens shape of. In this case, the size of the lens is in micro units, and the lens may be formed on the entire surface of the first and second light guide plates 110a and 110b, and the actual emission area of the first and second light guide plates 110a and 110b. It can be formed only on the surface corresponding to.

As such, by changing the patterns formed on one surface of the first LGP 110a and the second LGP 110b, the light distribution characteristics of the light emitted to the upper and lower portions of the lighting module may be adjusted.

The first light excitation film 170a and 170b is between the first light guide plate 110a and the first light source portions 150a and 150b, and the second light excitation film 170c and 170d is the second light guide plate 110b and the second light source portion. It is disposed between the (150c, 150d), respectively, and includes a plurality of fluorescent materials in the first optical excitation film (170a, 170b) and the second optical excitation film (170c, 170d).

The first light excitation film 170a and 170b and the second light excitation film 170c and 170d may be physically separated and disposed to correspond to the first light source parts 150a and 150b and the second light source parts 150c and 150d. However, the first light excitation film 170a and 170b and the second light excitation film 170c and 170d may be formed as a single film and disposed to correspond to the first and second light source units.

The first light excitation films 170a and 170b and the second light excitation films 170c and 170d convert a portion of the wavelengths of the light emitted from the first light source parts 150a and 150b and the second light source parts 150c and 150d to provide the light. You can convert colors.

Although not shown in the drawing, the first optical excitation film 170a and 170b and the second optical excitation film 170c and 170d include a transparent resin and a fluorescent material contained in the transparent resin. The fluorescent materials of the first photoexcitation films 170a and 170b and the second photoexcitation films 170c and 170d may be identical to each other, but may be different from each other so as to convert to a different color of light to provide a sensitive illumination light.

Meanwhile, 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.

Although not shown in the drawing, the diffusion plate may diffuse the light emitted from the light guide plates 110a and 110b to the outside to eliminate the spot characteristic of the beam. Therefore, the first light guide plate 110a and the lower portion of the second light guide plate 110b are disposed on any one or both portions, and the diffusion plate is inserted into the first case 200a and the second case 200b. do.

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 irradiation direction of the conventional light has a large irradiation area in both directions, unlike the irradiation direction of only one direction in the upper or lower direction.

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

Referring to FIG. 4, the first case 200a and the second case 200b are the same as the case of the lighting module of the first embodiment, and the parts not mentioned thereafter are the same as the lighting module of the first embodiment. The description will be omitted.

However, unlike the first embodiment, the light source units 250a and 250b respectively disposed inside the first case and the second case are respectively disposed inside the first case and the second case. Therefore, the manufacturing cost of the lighting module can be substantially reduced.

The light guide plate includes a first light guide plate 210a and a second light guide plate 210b, and each of the light guide plates 210a and 210b is optically coupled to the first light source unit 250a and the second light source unit 250b, respectively. Each light emitted from the 250a) and the second light source 250b is guided.

The thickness of the first LGP 210a decreases as the distance from the light source 250a increases. That is, the first light guide plate 210a has a first inclined surface. The thickness of the second light guide plate 210b also decreases away from the light source unit 250b. That is, the second light guide plate 210b has a second inclined surface.

The first inclined surface and the second inclined surface of the first LGP 210a and the second LGP 210b are disposed to face each other, and are disposed between the first inclined surface of the first LGP 210a and the second inclined surface of the second LGP 210b. The reflecting plate 190 is disposed. The reflector plate 190 emits light passing through the first light guide plate 210a and the second light guide plate 210b in the up and down directions of the lighting module.

The lighting module may have the same number of light emitting devices included in each of the light source units 250a and 250b. However, the number of light emitting devices may be varied so that the amount of light emitted to the lighting module may be differently controlled. Since the arrangement and type of the light emitting device are the same as in the first embodiment, description thereof will be omitted.

In addition, the amount of light emitted in the upper and lower directions of the lighting module can be adjusted by varying the current value applied to each light source unit.

5 is a diagram illustrating light distribution characteristics of a lighting module according to a second exemplary embodiment of the present invention.

As shown, the light distribution of the lighting module according to the second embodiment has a biased characteristic in one direction. This occurs when the same pattern is formed on one surface of the first and second light guide plates or no pattern is formed. Such a lighting module can be used in a spatial structure that meets the above light distribution characteristics, but it is generally necessary to have a lambosian light distribution characteristic.

6 is a view showing light distribution characteristics of an illumination module including a pattern formed on a slope of a light guide plate in a second embodiment of the present invention.

As illustrated, different first patterns P1 and second patterns P2 are formed on the first and second slopes of the first LGP 250a and the second LGP 250b, respectively. Each pattern can vary in size, density, shape, and the like. Accordingly, even if the structure of each light guide plate is different, the light distribution characteristic of the light emitted to the upper and lower parts of the lighting module may have a rambosine shape, and thus, it may be substantially utilized as a lighting device.

7 is a third embodiment of the present invention and is a cross-sectional view for explaining the structure of a lighting module.

Referring to FIG. 7, similarly to the second embodiment, the structure of the lighting module of the first embodiment is almost similar. Therefore, the description of the same parts as in the first embodiment will be omitted.

However, unlike the respective light source units 150a, 150b, 150c, and 150d disposed on the left and right sides of the light guide plates 110a and 110b in the first embodiment, the left side of each light guide plate 110a and 110b in the third embodiment. The light sources 350a and 350b are disposed only at any one of the right sides. Therefore, as in the second embodiment, the number of light source units can be reduced, thereby reducing the manufacturing cost of the lighting module.

In this case, each of the light source units 350a and 350b disposed at one side of the first LGP 110a and the second LGP 110b may be disposed at the side surfaces of the same or opposite direction.

Table 1 below shows actual specifications of the lighting module shown in FIGS. 1, 4, 6, and 7.

Product Item Value Strip Spce.
(13S * 5P)

Voltage (V) 39
Current (mA) 350
Power (W) 13.65
Module Spec.




Total Lumen output (lm) Up Lumen Output 2,500
2,000 Down Lumen Output 500 Module Power (W)
27.3
Efficacy (lm / W)
90
CCT (K)
4,000
CRI
80
Fixture Spec.
Lumen Output (lm)
10,000 (Up: 8,000, Down: 2,000)
DC Power Consumption (W)
110

Referring to Table 1, in the lighting module illustrated in FIGS. 1, 4, 6, and 7, the lumen value emitted upward is greater than the lumen value emitted downward. In addition, the lumens emitted upwards may be less than the lumens emitted downwards.

On the other hand, the width (W (mm)) * height (H (mm)) * length (L (mm)) of the lighting module shown in Figures 1, 4, 6 and 7 is 80 * 12 * 560 or 45 It may be any one of * 12 * 560.

Although described above with reference to the embodiment is only an example and is not intended to limit the invention, those of ordinary skill in the art to which the present invention belongs without departing from the essential characteristics of the embodiment, not illustrated 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.

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

Claims (6)

A light guide plate including a protrusion disposed on one surface;
A light source unit optically coupled to a side of the light guide plate; And
The light source unit is disposed, including a case covering the side of the light guide plate,
The case has a lighting module having a receiving groove for receiving the projection of the light guide plate.
The method of claim 1,
The case includes a first case and a second case,
And a first case and a second case which are physically spaced apart from each other to cover the side of the light guide plate so that light emitted from the light source unit is emitted upward and downward through the light guide plate.
The method of claim 2,
The first case and the second case each includes an upper case and a lower case fastened to each other,
The lower case includes a base portion on which the light source is disposed and an extension portion extending in a direction perpendicular to one surface of the base portion.
The upper case includes a support unit for supporting the light source and a coupling portion coupled to the base of the lower case.
The method of claim 3,
The coupling of the upper case and the lower case is a base portion of the lower case has a coupling groove on one surface, the coupling portion of the upper case has a coupling hole for screwing in correspondence with the coupling groove on one surface.
The method of claim 3,
The extension part of the lower case has a groove on one surface in the longitudinal direction of the extension module.
The method of claim 3,
The support module of the upper case includes a light receiving unit for receiving one side of the light source and one side of the base portion of the lower case.

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