KR20150025880A - Lighting apparatus - Google Patents

Lighting apparatus Download PDF

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Publication number
KR20150025880A
KR20150025880A KR20130104012A KR20130104012A KR20150025880A KR 20150025880 A KR20150025880 A KR 20150025880A KR 20130104012 A KR20130104012 A KR 20130104012A KR 20130104012 A KR20130104012 A KR 20130104012A KR 20150025880 A KR20150025880 A KR 20150025880A
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KR
South Korea
Prior art keywords
light
exit surface
reflection pattern
incident
led
Prior art date
Application number
KR20130104012A
Other languages
Korean (ko)
Inventor
이상철
Original Assignee
엘지전자 주식회사
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Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR20130104012A priority Critical patent/KR20150025880A/en
Publication of KR20150025880A publication Critical patent/KR20150025880A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/0015—Fastening arrangements intended to retain light sources
    • F21V19/0025—Fastening arrangements intended to retain light sources the fastening means engaging the conductors of the light source, i.e. providing simultaneous fastening of the light sources and their electric connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/70—Light sources with three-dimensionally disposed light-generating elements on flexible or deformable supports or substrates, e.g. for changing the light source into a desired form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)

Abstract

According to one aspect of the present invention, there is provided a lighting apparatus comprising a first emitting surface, a second emitting surface opposite to the first emitting surface, and at least one incident surface, A light guiding member whose exit surfaces are respectively bent; And a light emitting unit including an LED for emitting light toward an incident surface of the light guide member and a circuit board on which the LED is mounted, wherein at least one of the first emitting surface and the second emitting surface has the LED And a reflection pattern for reflecting the light incident from the first exit surface and the second exit surface is provided.

Figure P1020130104012

Description

[0001]

The present invention relates to a lighting apparatus, and more particularly, to an LED lighting apparatus.

Recently, there is an increasing interest in light emitting diodes (LED) lighting having many advantages such as efficiency, color diversity, and design autonomy.

A light emitting diode is a semiconductor device that emits light when a voltage is applied in a forward direction. It has a long lifetime, low power consumption, electrical, optical and physical characteristics suitable for mass production, and is rapidly replacing incandescent bulbs and fluorescent lamps.

A typical LED lighting apparatus has a structure in which light is emitted only in a specific direction, thereby having various light distribution directives. In order to adjust the direction of the light emitted from the LED, a lens unit and a reflecting member can be used. However, there is a problem that the manufacturing process becomes complicated and the manufacturing cost increases.

Accordingly, there is a demand for a lighting apparatus having a structure capable of performing decoration function together with various light distribution.

An object of the present invention is to provide a lighting device having a curved shape and having a uniform luminance.

It is another object of the present invention to provide an illumination device which can emit light in two or more directions at the same time and which can emit light on both sides with the same or different amounts of light.

It is another object of the present invention to provide a lighting device capable of simultaneously realizing a simple lighting function and a decorative function.

It is another object of the present invention to provide a lighting apparatus which can be applied to an automobile head and a rear lamp through a bent shape.

The present invention also provides a lighting device capable of producing a beautiful appearance.

According to one aspect of the present invention, there is provided a light emitting device having a first emission surface, a second emission surface opposite to the first emission surface, and at least one incident surface, A light guiding member whose surfaces are respectively bent; And a light emitting unit including an LED for emitting light toward an incident surface of the light guide member and a circuit board on which the LED is mounted.

At least one of the first emitting surface and the second emitting surface is formed with a reflection pattern for reflecting light incident from the LED.

According to another aspect of the present invention, there is provided a light guiding member comprising: a light guide member having an exit surface and an incident surface opposite to the exit surface, the exit surface and the entrance surface being bent; And a light emitting unit including an LED for emitting light toward an incident surface of the light guide member and a flexible circuit board on which the LED is mounted.

Here, a reflection pattern for reflecting light incident from the LED is formed on the emission surface.

As described above, the lighting apparatus according to one embodiment of the present invention has the following effects.

It has a bent shape so as to produce a beautiful appearance and can provide a uniform luminance over the entire light emitting surface. In particular, a uniformity of 90% or more can be satisfied over the entire light emitting surface.

Further, light can be emitted simultaneously in two or more directions, and both sides of light can be emitted with the same or different amounts of light.

Further, it can be applied to automobile head and rear lamps through a bent shape.

1 and 2 are side views showing a lighting apparatus according to an embodiment of the present invention.
3 is a perspective view showing a lighting apparatus according to the first embodiment of the present invention.
4 is a cross-sectional view showing the illumination device shown in Fig.
5 is a plan view showing a reflection pattern related to the present invention.
6 is a photograph showing a reflection pattern related to the present invention.
7 is a cross-sectional view showing a lighting apparatus according to a second embodiment of the present invention.
8 is a conceptual diagram showing a state in which a lighting apparatus according to the present invention is applied to an automobile.

Hereinafter, a lighting apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings illustrate exemplary embodiments of the present invention and are provided to illustrate the present invention more specifically.

1 and 2 are side views showing a lighting device 100, 200 according to an embodiment of the present invention.

The lighting devices 100 and 200 may be a pendant type lighting device fixed to the wall W such as a ceiling with wires 170 and 270.

Referring to Figures 1 and 2, a lighting device 100, 200 in accordance with an embodiment of the present invention includes a housing 110, 210. The housings 110 and 210 include a front cover 111 and a rear cover 112 having a light transmitting portion (also referred to as a first light transmitting portion) and a light transmitting portion (also referred to as a second light transmitting portion) ).

The front covers 111 and 211 refer to the cover facing the illumination space and the rear covers 112 and 212 may refer to the cover facing the wall W. [

The rear covers 112 and 212 may be mounted on the front covers 111 and 211 and may be provided in a space between the front covers 111 and 211 and the rear covers 112 and 212, An illumination module M (see Fig. 3) is provided.

On the other hand, the lighting module M may have a structure capable of emitting light in two or more different directions, and may have a structure capable of emitting light on both sides. Specifically, the lighting module M may provide light to the light transmitting portions of the front covers 111 and 211 and the light transmitting portions of the rear covers 112 and 212, respectively.

Also, the housings 110 and 210 may have a panel shape extending in the longitudinal direction, and a slim panel having a relatively thin thickness compared to the length thereof may be formed.

The housings 110 and 210 may be bent to have a predetermined curvature. At this time, the front covers 111 and 211 and the rear covers 112 and 212 may be bent to have a predetermined curvature, respectively. The front covers 111 and 211 and the rear covers 112 and 212 may be formed of a resin material or a metal material having high durability and thermal conductivity. In one embodiment, the front covers 111 and 211 are formed of a resin material, and the rear covers 112 and 212 may be formed of a metal material.

Also, the front covers 111 and 211 and the rear covers 112 and 212 can be bent to have the same curvature. The front covers 111 and 211 and the rear covers 112 and 212 can be bent to have the same curvature as the lighting module M. [

Referring to FIG. 1, the housing 110 may be bent so that the center of curvature P is located in the illumination space. 2, the housing 210 can be bent such that the center of curvature P is located on the opposite side of the illumination space (e.g., on the wall side).

1, the light irradiated to the illumination space through the front cover 111 provides a feeling of being focused light, and the light emitted toward the wall W through the rear cover 112 is indirect It can provide a light feeling like a light.

2, the light irradiated to the illumination space through the front cover 211 provides a soft feeling such as indirect illumination and is irradiated through the rear cover 112 toward the wall W. In addition, Light can provide a feel like a spotlight.

On the other hand, the light amount (or luminance) of light provided through the front covers 111 and 211 may be determined to be equal to or different from the light amount (or luminance) of light provided through the rear covers 112 and 212 have.

The lighting devices 100 and 200 include electrical switches 160 and 260 for supplying power to the lighting module M. [ In one embodiment, the electrical components 160, 260 may be secured to the wall W.

At this time, the rear covers 112 and 212 may be physically connected to the front ends 160 and 260 through supporting members 170 and 270 such as wires. In addition, the front units 160 and 260 and the lighting module M may be electrically connected through cables 180 and 280.

The cables 180 and 280 may electrically connect the front units 160 and 260 to the lighting module M through the inside of the supporting members 170 and 270. [ Alternatively, the cables 180 and 280 may be electrically connected to the lighting units M and the electric units 160 and 260 while being exposed to the outside of the supporting members 170 and 270.

The illumination device 100 and 200 may further include a remote controller 190 and 290 for on / off control of the illumination module M.

The user can use the remote controller 190 or 290 to operate the lighting device 100 or 200 or to stop the operation of the lighting device 100 or 200 and to dimming the lighting module M, Control can be performed.

Meanwhile, even when the illumination module M and the housing 110 are bent at a predetermined curvature, the light emitted through the front covers 111 and 211 and the rear cover 212 should be uniform over the entire light transmitting portion .

Specifically, light should be emitted at a uniform light amount (or brightness) throughout the light transmitting portion. At this time, the uniformity between the light transmission regions may be 80% or more, and preferably 90% or more.

FIG. 3 is a perspective view showing a lighting apparatus according to a first embodiment of the present invention, and FIG. 4 is a sectional view showing the lighting apparatus shown in FIG.

Referring to Figures 3 and 4, the illumination device 100, 200 associated with the first embodiment of the present invention includes an illumination module M. [ The illumination module M includes a light guide member 120 and at least one light emitting unit 130.

Specifically, the illumination module M includes a first exit surface 121, a second exit surface 122 in the direction opposite to the first exit surface 121, and one or more entrance surfaces (e.g., 123) , And the first exit surface 121 and the second exit surface 122 include a bent light guide member 120, respectively.

The light guide member 120 extends along the longitudinal direction in the same manner as the housings 110 and 210 described with reference to FIGS. In an embodiment, the light guide member 120 may have a rectangular parallelepiped shape extending in the longitudinal direction. Also, the light guide member 120 is bent to have a predetermined curvature as in the case of the housings 110 and 210.

Specifically, the first exit surface 121 and the second exit surface 122 of the light guide member 120 may be bent, and the first exit surface 121 and the second exit surface 122 may be bent It can be bent at the same curvature.

The first exit surface 121 and the second exit surface 122 may be bent at the same curvature as that of the housings 110 and 210. In addition, the first exit surface 121 and the second exit surface 122 may have the same center of curvature.

1 and 3, the first emitting surface 121 faces the front cover 111 of the housing 110 and the second emitting surface 122 faces the rear surface of the housing 110. [ (112). ≪ / RTI >

That is, the first exit surface 121 forms the front surface of the light guide member 120, and the second exit surface 122 forms the rear surface of the light guide member 120.

At this time, the incident surface 123 may form a side surface of the light guide member 120.

In one embodiment, the incident surface 123 connects the first exit surface 121 and the second exit surface 122, and at least one of the first exit surface 121 and the second exit surface 122 May be perpendicular to the incident surface 123.

Specifically, the light incident into the light guide member 120 through the incident surface 123 is guided along the longitudinal direction of the light guide member 120 and is converted into a vertical direction, and then is incident on the first exit surface 121 And the second exit surface 122, respectively.

The light guiding member 120 may be formed of a light transmitting material so that light incident from the light emitting unit 140 may be radiated to the outside. In one embodiment, it may be formed of a transparent material, or alternatively may be formed of a translucent material.

In addition, the light guide member 120 may be formed of a transparent resin material, or may be formed of polycarbonate (PC) or polymethylmethacrylate (PMMA).

Also, the light guide member 120 may be bent in a curved shape.

The illumination module M includes an LED 142 for emitting light toward an incident surface (for example, 123) of the light guide member 120 and a circuit board 141 on which the LED 142 is mounted And a light emitting unit 140 including a light emitting unit.

4, the light emitting unit 140 is provided as a side view type that irradiates light toward an incident surface 123 perpendicular to the first and second emitting surfaces 121 and 122 .

The incident surface includes a first incident surface 123 and a second incident surface 124 opposite to the first incident surface 123. At this time, the first incident surface 123 and the second incident surface 124 may be orthogonal to the first exit surface 121 and the second exit surface 122, respectively.

The light emitting unit may include a first light emitting unit 140 for emitting light to the first incident surface 123 and a second light emitting unit 143 for irradiating the second incident surface 124 .

The second light emitting unit 143 has the same structure as the first light emitting unit 140 and includes the LED 145 and the circuit board 144 on which the LED is mounted.

The light emitting units 140 and 143 may include at least one of a red LED, a green LED, a blue LED, and a white LED. The light emitting units 140 and 143 may include at least two or more of a red LED, a green LED, a blue LED, and a white LED.

Accordingly, the illumination module M may be configured in different colors or may provide various illumination environments capable of color mixing.

That is, the first and second light emitting units 140 and 143 are formed to emit light having a uniform luminance value through the first and second emitting surfaces 121 and 122 of the light guide member 120, 1 and the second incident surface 123, 124, respectively.

The first and second light emitting units 140 and 143 may be spaced apart from the incident surfaces 123 and 124 of the light guide member 120 by a predetermined distance.

When the first and second light emitting units 140 and 143 are disposed close to the incident surfaces 123 and 124 of the light guide member 120, the first and second light emitting units 140 and 143, A hot spot may be generated in the incident region of the light guide member 120 in the vicinity.

The first and second light emitting units 140 and 143 may be separated from the incident surfaces 123 and 124 of the light guide member 120 by a predetermined distance so that the hot spot is not observed from the outside .

The illumination module M may further include a heat sink 150 surrounding the first and second light emitting units 140 and 143 and a part of the light guide member 120. [

Meanwhile, the heat sink 150 dissipates heat generated in the light emitting units 140 and 143 to the outside. The heat sink 150 may be formed of a resin material or a metal material having excellent thermal conductivity.

The heat sink 150 may include a main body 151 surrounding the light emitting units 140 and 143 and a plurality of radiating fins 152 extending from the main body 151. The radiating fins 152 may extend in a direction opposite to the irradiation direction of the light emitting units 140 and 143.

The main body 151 of the heat sink 150 surrounds the light emitting units 140 and 143 so that the light emitting units 140 and 143 are not observed from the outside.

That is, the heat sink 150 dissipates heat generated from the light emitting units 140 and 143 to the outside, and performs a cover function that does not expose the light emitting units 140 and 143 to the outside.

The light incident from the LEDs 142 and 145 of the light emitting units 140 and 143 is incident on the at least one of the first emitting surface 121 and the second emitting surface 122 to the first emitting surface A reflection pattern 130 for reflecting the light onto the exit surface 121 or the second exit surface 122 is formed.

In one embodiment, in the structure in which the light guide member 120 emits double-sided light through the first exit surface 121 and the second exit surface 122, the reflection pattern 130 is reflected by the first exit surface 121 and / And the second exit surface 122, respectively.

That is, the reflection pattern 130 reflects the light incident from the LEDs 142 and 145 to the first emission surface 121 and / or the second emission surface 122, respectively.

The reflection pattern 130 induces total reflection of light incident through the incident surfaces 123 and 124 to irradiate the entire area of the first and second exit surfaces 121 and 122 at a uniform light amount .

In other words, the reflection pattern 130 reflects the incident light to the first exit surface 121 and / or the second exit surface 122, and simultaneously reflects the light along the inside of the light guide member 120 So that the light can be guided.

For convenience of explanation, the reflection pattern provided on the first exit surface 121 is referred to as a first reflection pattern, and the second reflection pattern provided on the second exit surface 122 is referred to as a second reflection pattern

In addition, the first reflection pattern and the second reflection pattern may be formed asymmetrically with respect to any one emission surface so that total reflection of light guided along the inside of the light guide member 120 may be uniform.

On the other hand, when the first reflection pattern and the second reflection pattern are provided asymmetrically, it means that the first reflection pattern and the second reflection pattern are not the same. In one embodiment, the first reflection pattern and the second reflection pattern And can be eccentrically spaced at predetermined intervals.

The reflection pattern 130 may include at least one of a protrusion, a scratch, and a recess. In particular, the reflection pattern 130 may be formed of any one of a projection, a scratch, and a recess.

Further, when the reflection pattern 130 is formed only of protrusions, the protrusions may have the same shape and size. In this case, the reflection pattern 130 may be defined as the number of protrusions per unit area.

Likewise, when the reflection pattern 130 is composed of recesses, the recesses may have the same shape and size. In this case, the reflection pattern 130 may be defined as the number of recesses per unit area.

Meanwhile, the reflection pattern 130 may include a plurality of micro recesses 131 (131-1, 131-2) having the same shape and size.

In the first exit surface 121 and the second exit surface 122, regions E1 and E2, E2 and E3 having different numbers of micro recesses 131-1 and 131-2 per unit area are formed, respectively, . The number of micrices 150 per unit area can be referred to as the density of the reflection pattern 130 for convenience of explanation.

For example, in the first emission surface 121, a region having a relatively large number of micrices (131-1) per unit area, that is, regions (E1, E3) having high density and micrices (131-1 ) Is relatively small, that is, the low density region E2 is provided.

Likewise, in the second exit plane 122, a region having a relatively large number of micrices 131-2 per unit area, that is, a region having a high density (E1, E3) and a microreceptor 131-2 A region having a relatively small number of regions, that is, a region E2 having a low density is provided.

Referring to FIG. 4, the reflection pattern 130 may be formed to decrease in density as the distance from the light emitting units 140 and 143 increases.

Specifically, the first incident surface 123, which is adjacent to the first light emitting unit 140 and the second light emitting unit 143, and the neighboring areas E1 and E3 of the second incident surface 124, And the region E2 in which the first light emitting unit 140 and the second light emitting unit 143 are relatively far apart is provided such that the density is relatively low.

That is, the total reflection is actively performed in the vicinity of the first light emitting unit 140 and the second light emitting unit 143, so that the density of the reflection pattern 130 .

The first and second light emitting units 140 and 143 may emit light in a direction away from the first light emitting unit 140 and the second light emitting unit 143, ) May be configured to have a low density.

As described above, the density difference of the area-specific reflection patterns 130 functions to maintain a uniform amount of light (luminance) throughout the entire area of the emission surfaces 121 and 122.

Although the embodiment has been described so far in which both-side light emission is performed through the first emission surface 121 and the second emission surface 122, the present invention is not limited thereto.

The illumination module M may be provided on the first exit surface 121 or the second exit surface 122 so that light can be radiated only on one of the first exit surface 121 and the second exit surface 122. [ (Not shown) that surrounds the light emitting diodes (not shown).

For example, when the reflecting member is provided on the second emitting surface 122, light can be emitted only to the first emitting surface 121. [

Fig. 5 is a plan view showing a reflection pattern related to the present invention, and Fig. 6 is a photograph showing a reflection pattern related to the present invention.

As described above, the reflection pattern 130 may include a plurality of micro recesses 131 (131-1, 131-2) having the same shape and size. Here, the micro recess 131 may have a frustum shape.

When the microreceptor 131 has a truncated cone shape, the large diameter may be about 418 mu m, and the small diameter may be about 49.8 mu m. In addition, the microreceptor 131 may be configured to expose a large-diameter region to the outside.

5), or attaching the reflective film 132 provided with the reflective pattern 130 to the light guide member 120 (see FIG. 6A) ).

A method of directly using the light guide member 120 may include forming a reflection pattern 130 by printing or injection molding, and the reflection pattern 130 may be formed by roll stamping or laser processing.

7 is a cross-sectional view showing a lighting apparatus according to a second embodiment of the present invention.

The illumination module 300 according to the second embodiment of the present invention includes a light guide member 320, a light emitting unit 340, and a reflection pattern 330.

Specifically, the light guide member 320 has an exit surface 321 and an incident surface 322 opposite to the exit surface 321. Here, the light guide member 320 has a curved shape to have a predetermined curvature. Specifically, the exit surface 321 and the incident surface 322 have a curved shape.

Compared with the first embodiment, the first exit surface 121 of the light guide member 120 of the first embodiment corresponds to the exit surface 321 of the light guide member 320 of the second embodiment. The second exit surface 122 of the light guide member 120 of the first embodiment corresponds to the incident surface 322 of the light guide member 320 of the second embodiment.

The lighting module 300 includes an LED 342 for emitting light toward an incident surface 322 of the light guide member 320 and a flexible circuit board 341 on which the LED 342 is mounted Unit 340 as shown in FIG.

In the second embodiment, the light emitting unit 340 is configured as a flexible circuit board 341 so as to be bent together with the light guide member 320. The flexible circuit board 341 and the light guide member 320 can be bent at the same curvature.

A plurality of LEDs 342 are mounted on the flexible circuit board 341, and a plurality of LEDs 342 are spaced apart from each other by a predetermined distance. That is, the light emitting unit 340 is configured in a top view mode.

The lighting module 300 may further include a heat sink 350 for supporting the light guide member 320 and a part of the light emitting unit 340 in a surrounding state.

In the illumination module 300, a reflection pattern 330 for reflecting light incident from the LED 342 is formed on the emission surface 321. At this time, the reflection pattern 330 is the same as the reflection pattern 130 described in the first embodiment.

In addition, a portion of the incident surface 322 surrounds the LED 342, and the reflection pattern may also be provided on the incident surface 322.

In addition, the reflection pattern 330 may include a plurality of micro recesses 331 and 332 having the same shape and size. As described in the first embodiment, the reflection pattern 330 may be formed so that the number of the micro recesses 331 and 332 per unit area becomes smaller as the distance from the LED 342 increases.

Fig. 8 is a conceptual diagram showing a state in which the lighting device related to the present invention is applied to the automobile C; Fig.

The illumination module (M, 300) associated with the present invention has a curved shape. On the other hand, the head lamp (not shown) and the rear lamp 400 of the automobile C are formed as curved surfaces of the mounting portion of the lighting module (M, 300). Therefore, the lighting module M related to the present invention is easy to apply to a head lamp (not shown) and a rear lamp 400. [

In addition, the lighting module (M, 300) can provide a uniform luminance over the entire light emitting surface even in a bent shape. In particular, a uniformity of 90% or more can be satisfied over the entire light emitting surface. Therefore, the automobile lamp regulation can be satisfied.

In addition, the heat sink 350 may have a mounting structure that can be mounted on the mounting portion of the head lamp or the mounting portion of the rear lamp 400.

100, 200: Lighting device
110: Housing
120: light guide member
140: Light emitting unit
130: reflection pattern
150: Heatsink

Claims (15)

A light guide member having a first exit surface, a second exit surface in a direction opposite to the first exit surface, and at least one entrance surface, the first exit surface and the second exit surface being bent; And
And a light emitting unit including an LED for emitting light toward the incident surface of the light guide member and a circuit board on which the LED is mounted,
Wherein at least one of the first exit surface and the second exit surface includes a reflection pattern formed to reflect light incident from the LED. The method according to claim 1,
Wherein the reflection pattern includes at least one of a projection, a scratch, and a recess. 3. The method of claim 2,
Wherein the reflection pattern includes a plurality of micrices that have the same shape and size. The method of claim 3,
Wherein the microreceptor has a truncated cone shape. The method according to claim 2 or 3,
Wherein the reflection pattern is arranged to decrease in density as the distance from the light emitting unit increases. 3. The method of claim 2,
Wherein the reflection pattern is provided on the first exit surface and the second exit surface, respectively,
Wherein the first reflection pattern provided on the first emission surface and the second reflection pattern provided on the second emission surface are formed asymmetrically with respect to any emission surface. The method according to claim 1,
Wherein the incident surface connects the first exit surface and the second exit surface,
And at least one of the first exit surface and the second exit surface is orthogonal to the incident surface. The method according to claim 1,
Wherein the first exit surface and the second exit surface have the same center of curvature. The method according to claim 1,
Further comprising a heat sink surrounding a part of the light-emitting unit and the light guide member. The method according to claim 1,
The incidence surface includes a first incidence surface and a second incidence surface opposite to the first incidence surface,
Wherein the light emitting unit includes a first light emitting unit for emitting light to the first incident surface and a second light emitting unit for emitting light to the second incident surface. The method according to claim 1,
And a reflective member surrounding the first exit surface or the second exit surface. A light guide member having an exit surface and an incident surface opposite to the exit surface, the exit surface and the entrance surface being bent; And
And a light emitting unit including an LED for emitting light toward an incident surface of the light guide member and a flexible circuit board on which the LED is mounted,
Wherein the exit surface is formed with a reflection pattern for reflecting light incident from the LED. 13. The method of claim 12,
The incident surface is provided in a direction opposite to the emitting surface,
Wherein the flexible circuit board and the light guide member are bent at the same curvature. 13. The method of claim 12,
Wherein a part of the incident surface surrounds the LED,
Wherein the reflection pattern is also provided on an incident surface. 13. The method of claim 12,
Wherein the reflection pattern includes a plurality of micrices having the same shape and size,
Wherein the reflection pattern is formed so that the number of micrises per unit area decreases as the distance from the LED decreases.
KR20130104012A 2013-08-30 2013-08-30 Lighting apparatus KR20150025880A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
KR20130104012A KR20150025880A (en) 2013-08-30 2013-08-30 Lighting apparatus

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106122872A (en) * 2016-08-22 2016-11-16 上海小糸车灯有限公司 A kind of car light light conductor with multiple rows of shape photoconduction tooth
CN107170367A (en) * 2016-03-08 2017-09-15 三星显示有限公司 Display device
CN108680985A (en) * 2018-05-22 2018-10-19 合肥诚辉电子有限公司 A kind of automobile display screen light guide plate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107170367A (en) * 2016-03-08 2017-09-15 三星显示有限公司 Display device
US10031281B2 (en) 2016-03-08 2018-07-24 Samsung Display Co., Ltd. Display apparatus
CN107170367B (en) * 2016-03-08 2021-01-12 三星显示有限公司 Display device
CN106122872A (en) * 2016-08-22 2016-11-16 上海小糸车灯有限公司 A kind of car light light conductor with multiple rows of shape photoconduction tooth
CN108680985A (en) * 2018-05-22 2018-10-19 合肥诚辉电子有限公司 A kind of automobile display screen light guide plate

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