KR20130022899A - Flat type illumination device - Google Patents

Flat type illumination device Download PDF

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Publication number
KR20130022899A
KR20130022899A KR1020110085906A KR20110085906A KR20130022899A KR 20130022899 A KR20130022899 A KR 20130022899A KR 1020110085906 A KR1020110085906 A KR 1020110085906A KR 20110085906 A KR20110085906 A KR 20110085906A KR 20130022899 A KR20130022899 A KR 20130022899A
Authority
KR
South Korea
Prior art keywords
light emitting
emitting device
light
reflector
substrate
Prior art date
Application number
KR1020110085906A
Other languages
Korean (ko)
Inventor
아리요시 테츠오
박천호
유병현
Original Assignee
삼성전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR1020110085906A priority Critical patent/KR20130022899A/en
Publication of KR20130022899A publication Critical patent/KR20130022899A/en

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Classifications

    • 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
    • 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
    • F21K9/68—Details of reflectors forming part of the light source
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • 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]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
    • H05K2201/2054—Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics

Abstract

According to an aspect of the present invention, there is provided a flat panel lighting apparatus including a first reflective part having a curved surface on an upper surface of a light emitting device and a second reflection on a substrate on which the light emitting device is mounted, thereby improving uniformity of light emitted to the outside. Can be made slimmer.
In addition, it is not necessary to reduce the pitch in which the light emitting elements are arranged in the flat panel lighting apparatus, so that no additional light emitting elements are required, thereby securing a price competitiveness.

Description

Flat lighting equipment {FLAT TYPE ILLUMINATION DEVICE}

Disclosed is a flat panel lighting apparatus, and more particularly, a flat panel lighting apparatus capable of improving light uniformity and slimming.

Light Emitting Device (LED) is a semiconductor light emitting device that emits light when current flows. The light emitting device has been widely applied to a backlight of an illumination device, an electronic board, a display device, etc. due to long life, low power consumption, fast response speed, and excellent initial driving characteristics, and its application field is gradually expanding.

The light emitting device is smaller than a conventional light source, and consumes less power because electrical energy is directly converted into light energy. In recent years, the spread of flat panel lighting apparatuses using light emitting devices as light sources has increased in general homes and offices requiring low power consumption and high brightness. Also, attention has been paid to flat panel type lighting devices that employ a light emitting element and have a thinner thickness.

In a flat panel lighting apparatus, a white diffusion paint is included inside a diffusion plate so that a light emitting element is not visible, or a light diffusion effect is incorporated into a plastic used as a diffusion plate to realize a light diffusion effect.

In addition, in the flat panel lighting apparatus, the thickness of the case in which the light emitting device is accommodated typically needs a distance of about 1.2 to 1.5 times the pitch of the light emitting device. That is, for a lighting fixture of 600 mm x 600 mm, which is the size of a general ceiling, if the pitch is set to 32.5 mm using 256 light emitting elements, the thickness of the case required will be about 45 mm. However, in order to achieve a slimmer flat panel lighting device, the required thickness of the case must be smaller than this, and the cost is large because the number of light emitting elements is required to be 9 times or more when the pitch of light emitting elements is reduced to about 1/3 for slimming. Increase in width.

Therefore, in the flat panel lighting apparatus, a technique for securing uniformity of light emitted to the outside, achieving slimming, and securing price competitiveness is needed.

Provided is a flat type lighting device that improves light uniformity and makes slim.

According to an embodiment of the present invention, a flat panel lighting apparatus includes: a light emitting device for generating light, a substrate on which the light emitting device is mounted, an accommodation part in which the substrate is accommodated, a power supply unit for supplying power to the light emitting device, and the light emitting device And a diffuser plate for diffusing the light generated from the device and a first reflecting part surrounding the light emitting device and having a curved surface, wherein the first reflecting part includes light generated from the light emitting device and light reflected from the first reflecting part. An opening through this is formed.

In the flat panel lighting apparatus according to the aspect of the present invention, in the first reflecting portion, the size of the opening may be smaller as the distance from the substrate.

In the flat panel lighting apparatus according to an aspect of the present invention, it may further include a second reflecting portion formed on the substrate.

In the flat lighting device according to the aspect of the present invention, the first reflecting portion and the second reflecting portion may be formed of the same material.

In the flat lighting device according to an aspect of the present invention, the first reflecting portion and the second reflecting portion, polyethylene terephthalate (polyethylene terephthalate, PET), polycarbonate (PC), and polypropylene (polypropylene, PP It may be formed of a material selected from the group consisting of

In the flat panel lighting apparatus according to the aspect of the present invention, the reflectance of the first reflector and the second reflector may be 95% or more.

In the flat lighting device according to one side of the present invention, the thickness of the receiving portion may be 10 ~ 15 mm.

In the flat lighting device according to one side of the present invention, it may further include a third reflecting portion formed on the inner surface of the receiving portion.

According to an aspect of the present invention, there is provided a flat panel lighting apparatus including a first reflective part having a curved surface on an upper surface of a light emitting device and a second reflection on a substrate on which the light emitting device is mounted, thereby improving uniformity of light emitted to the outside. Can be made slimmer.

In addition, it is not necessary to reduce the pitch in which the light emitting elements are arranged in the flat panel lighting apparatus, so that no additional light emitting elements are required, thereby securing a price competitiveness.

1 is an exploded perspective view schematically showing a flat lighting device according to one side of the present invention.
FIG. 2 is a cross-sectional view illustrating a cross section of the flat lighting apparatus of FIG. 1.
3A and 3B are enlarged views of a portion of a flat panel lighting apparatus according to one side of the present invention.
4 is a view showing a simulation result of the luminance distribution on the surface of the diffusion plate of the flat panel lighting apparatus according to the embodiment and the comparative example.

In the description of the present invention, in the case where each substrate, face or part, etc. is described as being formed "on" or "under" of each substrate, face or part, the "phase ( on "and" under "include both" directly "or" indirectly "formed through other components. In addition, the upper or lower reference of each component is described with reference to the drawings.

The size of each component in the drawings may be exaggerated for the sake of explanation and does not mean the size actually applied.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the flat type lighting apparatus according to the present invention.

1 is an exploded perspective view schematically showing a flat lighting device according to one side of the present invention. FIG. 2 is a cross-sectional view illustrating a cross section of the flat lighting apparatus of FIG. 1. 3A and 3B are enlarged views of a portion of a flat panel lighting apparatus according to one side of the present invention.

1 and 2, a flat lighting device according to one side of the present invention includes a power supply unit 100, a receiving unit 200, a substrate 300, a light emitting device 400, and a first reflecting unit ( 510 and diffuser plate 600.

The power supply unit 100 may be provided with an external power source such as a connector to supply driving power to the light emitting device 400. In addition, a circuit board (not shown) connected to the power supply unit 100 and the light emitting device 400 and applying or blocking power to the light emitting device 400 may be provided to supply power to the light emitting device 400. When the power supply unit 100 applies power to the light emitting device 400, power is applied to the light emitting device 400 through a circuit, so that a plurality of light emitting devices may be turned on at the same time.

Receiving unit 200 may be in the form of a rectangular box. The accommodating part 200 may accommodate the substrate 300 on which the light emitting device 400 is mounted. The design including the shape and shape of the accommodating part 200 may be modified according to the substrate 300 and the light emitting device 400 on which the light emitting device 400 is mounted. The accommodation part 200 may protect the substrate 300 and the light emitting device 400 on which the light emitting device 400 is mounted from an external environment. The receiving part 200 may be made of aluminum, but is not limited thereto.

In addition, the accommodating part 200 may have a heat dissipation performance. That is, the accommodating part 200 may be made of a material having a high thermal conductivity so as to directly discharge heat generated from the light emitting device 400 to the outside.

The receiving part 200 may further include a third reflecting part 530 on the side surface of the receiving part 200 to reflect the light emitted from the light emitting device 400. The third reflector 530 may be formed in the form of a reflective sheet, and will be described in detail with the second reflector 520 and the first reflector 510.

The light emitting device 400 is mounted on the substrate 300. The substrate 300 may have a heat dissipation performance similarly to the accommodating part 200. That is, the substrate 300 may be formed of a printed circuit board (PCB) made of metal having high thermal conductivity. As a result, heat generated from the light emitting device 400 may be directly emitted to the outside through the substrate 300 and the accommodation part 200. Therefore, it is possible to prevent the life of the light emitting device 400 from being reduced by heat.

The second reflector 520 may be further formed on the substrate 300. The second reflector 520 may be formed in a sheet form and will be described in detail together with the first reflector 510.

The light emitting device 400 may include a light emitting device chip, a phosphor layer, and a lens. The light emitting device 400 may be mounted on the substrate 300 in a package form, or may be modularized and mounted on the substrate. In this case, the light emitting device may be mounted on a module substrate in the form of a flip chip, whereby the light emitting device may be mounted on the module substrate at a high density, and the module size may be reduced.

Briefly describing the light emitting device chip, the light emitting device chip includes a first conductive semiconductor layer, an active layer, a second conductive semiconductor layer, and an electrode.

The first conductivity type semiconductor layer may be n-doped, and electrons are transferred to the active layer through the first conductivity type semiconductor layer. An active layer is formed on the first conductive semiconductor layer. The active layer may have a stacked structure in which quantum barrier layers and quantum well layers are alternately repeated so that electrons and holes recombine to emit light. The active layer may vary in composition depending on a desired emission wavelength. The second conductivity type semiconductor layer may be formed on the active layer. The second conductivity type semiconductor layer may be p-doped. Holes are transferred to the active layer through the second conductive semiconductor layer.

A transparent electrode may be formed on the second conductive semiconductor layer. The transparent electrode may be formed of a transparent metal layer such as Ni / Au or may be formed of a conductive oxide such as ITO. The p-type electrode is formed on the transparent electrode, and the n-type electrode is formed on the first conductive semiconductor layer. The p-type electrode and the n-type electrode may be formed of various metal materials such as Ti / Al. Holes are supplied through the p-type electrode, and electrons are supplied through the n-type electrode. The holes and electrons thus supplied generate light energy by bonding in the active layer.

The phosphor layer is formed on the light emitting device chip, and light emitted from the light emitting device may pass through the phosphor layer to the lens. The phosphor layer may perform color conversion by scattering light emitted from the light emitting device. For example, blue light emitted from the light emitting device may be converted into yellow, green, or red while passing through the phosphor layer to emit white light. The phosphor layer is formed to have a thin and uniform thickness, so that light passing through the phosphor layer may be uniformly color converted.

The diffusion plate 600 may diffuse the light generated from the light emitting device 400. The diffusion plate may be made of a transparent material such as glass, acrylic, polycarbonate, and polyvinyl chloride (PVC). The diffusion plate 600 may be made of a material in consideration of light transmittance and diffusivity as well as durability, water resistance, and moisture proof.

The diffusion plate 600 may uniformly diffuse the light emitted from the light emitting device 400. The diffusion plate 600 may uniformly diffuse the light reflected from the first reflector 510, the second reflector 520, and the third reflector 530. Sufficient luminance may be exhibited through the diffusion plate 600, and uniform luminance may be ensured.

Hereinafter, in the flat panel lighting apparatus according to an embodiment of the present invention, the first reflecting unit 510, the second reflecting unit 520, and the third reflecting unit 530 will be described in detail.

The first reflector 510 is formed on the light emitting device 400 disposed on the substrate 300. The first reflecting portions 510 are formed on the respective light emitting devices 400 formed on the substrate 300. The first reflector 510 may surround the light emitting device 400 and may be formed in a curved surface, and the first reflector 510 may reflect light generated from the light emitting device 400 and reflected from the first reflector 510. An opening 550 through which light passes is formed.

That is, since the light generated from the light emitting device 400 has straightness and the intensity of light is stronger at the upper side than the side of the light emitting device 400, the first reflecting unit 510 is disposed on the upper surface of the light emitting device 400. By forming the light, the light is reflected by the second reflector 520. For this reason, the light at the portion corresponding to the upper portion of the light emitting device 400 may be uniformly distributed through the first reflecting portion 510.

Although the opening 550 is described as passing through the light generated by the light emitting device 400 and the light reflected by the first reflecting unit 510, the second reflecting unit 520 and the third reflecting unit 530 are also described. Reflected light from the light may pass through.

In addition, as illustrated in FIGS. 3A and 3B, the size of the opening 550 may be smaller as the distance from the substrate 300 increases. The opening 550 may pass through the light generated by the light emitting device 400, the light reflected by the first reflecting unit 510, the second reflecting unit 520, or the third reflecting unit. The portion corresponding to the side surface may have a large size, and the portion corresponding to the upper portion of the light emitting device 400 may have a small size. As a result, when the light generated from the light emitting device 400 has a straightness, the opening 550 may not be formed in a portion corresponding directly to the top of the light emitting device 400 as shown in FIG. 3A.

In addition, the light reflected from the first reflector 510 may be reflected through the second reflector 520 formed on the substrate 300. As the second reflector 520 is formed on the substrate 300, the light generated from the light emitting device 400 is reflected from the first reflector 510 and then reflected by the second reflector 520. As a result, the light is uniformly dispersed in the portion corresponding to the upper portion of the light emitting device 400 through the first reflecting portion 510 and the second reflecting portion 520 to emit light to the outside, thereby securing uniform luminance. can do. In addition, the light emitting devices 400 may be disposed at wide intervals, thereby reducing the number of light emitting devices 400 used in the lighting apparatus.

As a result, the flat panel lighting apparatus according to an embodiment of the present invention can achieve a uniform luminance even if the separation distance of the light emitting device 400 mounted on the substrate 300 is wide, and the plurality of light emitting devices 400 Since it is not necessary to reduce the thickness of the receiving portion 200 it is possible to slim the flat panel lighting device. At this time, in the slim flat panel lighting apparatus, the thickness of the accommodation portion 200 may be 10 ~ 15 mm.

As a result, the flat lighting device according to the embodiment of the present invention includes a first reflecting portion 510 formed around the light emitting device 400 and having a curved surface, and a second reflecting portion 520 having a sheet shape formed on the substrate 300. By providing a uniform luminance on the surface of the diffuser plate 600, it is possible to reduce the number of the light emitting device 400, thereby lowering the manufacturing cost can secure a price competitiveness.

That is, the light generated by the light emitting device 400 is reflected by the first reflector 510 and the second reflector 520 and is uniformly emitted to the outside through the diffuser plate 600. In this case, since a large amount of light is generated directly above the light emitting device 400, it is necessary to appropriately distribute the light. For this purpose, the first reflecting unit 510 is present. That is, when the light of the light emitting device 400 has a straightness, it is primarily reflected through the first reflecting unit 510 and then secondarily reflected through the second reflecting plate 520, through the diffuser plate 600. The uniformity of the light emitted to the outside can be improved.

Furthermore, the light reaching the side of the receiving part 200 may be reflected by the third reflecting part 530 and emitted to the outside through the diffusion plate 600.

Therefore, the flat lighting device according to the side of the present invention, due to the first reflecting portion 510, the second reflecting portion 520 and the third reflecting portion 530, through the diffuser plate 600 to the outside. The uniformity of the emitted light can be improved.

The first reflector 510 and the second reflector 520 may be formed of the same material. The first reflector 510 and the second reflector 520 may be formed of a material having a high reflectance. The first reflector 510 may be formed of a material selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), and polypropylene (PP), but is not limited thereto. Do not.

In addition, the first reflector 510 and the second reflector 520 may be formed separately and formed on the substrate 300 and the light emitting device 400, respectively. The second reflector 520 may be integrally formed by injection molding or extrusion, and may be disposed after the light emitting device 400 is mounted on the substrate 300. When the first reflector 510 and the second reflector 520 are integrally formed, the manufacturing cost may be reduced by simplifying the manufacturing process.

The reflectances of the first reflector 510 and the second reflector 520 may be 95% or more. That is, the first reflector 510 and the second reflector 520 may reflect 95% or more of the light that reaches each of the first reflector 510 and the second reflector 520. Preferably, the reflectances of the first reflector 510 and the second reflector 520 may be 97% or more.

The third reflector 530 may also be formed of the same material as the first reflector 510 and the second reflector 520, and the reflectance of the third reflector 530 may also be the first reflector 510. ) And the reflectance of the second reflector 520.

4 is a view showing a simulation result of the luminance distribution on the surface of the diffusion plate of the flat panel lighting apparatus according to the embodiment and the comparative example.

4 shows a case in which the first reflecting unit, the second reflecting unit and the third reflecting unit according to one side of the present invention are not used, and the embodiment shows the first reflecting unit and the first reflecting unit according to one side of the present invention. The case where a 2nd reflection part and a 3rd reflection part is used is shown.

Referring to FIG. 4, in the comparative example, the difference between the roll and the dark portion appears clearly on the surface of the diffuser plate. However, in the embodiment, there is almost no difference between the roll and the dark portion on the surface of the diffuser plate.

Accordingly, the flat panel lighting apparatus according to one aspect of the present invention includes a first reflecting portion formed on the upper surface of the light emitting device and includes a second reflection on the substrate on which the light emitting device is mounted, thereby providing uniformity of light emitted to the outside. Can be improved. In addition, it is not necessary to reduce the pitch in which the light emitting elements are arranged in the flat panel lighting apparatus, so that no additional light emitting elements are required, thereby securing a price competitiveness.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100: power supply unit 200: receiving unit
300: substrate 400: light emitting element
510: first reflecting unit 520: second reflecting unit
530: third reflecting unit 600: diffuser plate

Claims (8)

Light emitting device for generating light;
A substrate on which the light emitting device is mounted;
An accommodation part in which the substrate is accommodated;
A power supply unit supplying power to the light emitting device;
A diffuser plate for diffusing light generated from the light emitting device; And
A first reflective part surrounding the light emitting device and formed in a curved surface;
The first reflecting portion, the flat lighting device is formed with an opening through which the light generated by the light emitting element and the light reflected by the first reflecting portion passes.
The method of claim 1,
The flat lighting device of the first reflecting portion, the smaller the size of the opening is farther away from the substrate.
The method of claim 1,
And a second reflector formed on the substrate.
The method of claim 3,
And the first reflecting unit and the second reflecting unit are formed of the same material.
5. The method of claim 4,
The first reflecting unit and the second reflecting unit may be formed of a material selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), and polypropylene (PP). Lighting equipment.
The method of claim 3,
And a reflectance of the first reflecting unit and the second reflecting unit is 95% or more.
The method of claim 1,
A flat lighting device having a thickness of 10 to 15 mm.
The method of claim 3,
And a third reflector formed on an inner surface of the accommodation portion.
KR1020110085906A 2011-08-26 2011-08-26 Flat type illumination device KR20130022899A (en)

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Application Number Priority Date Filing Date Title
KR1020110085906A KR20130022899A (en) 2011-08-26 2011-08-26 Flat type illumination device

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Application Number Priority Date Filing Date Title
KR1020110085906A KR20130022899A (en) 2011-08-26 2011-08-26 Flat type illumination device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3354975A1 (en) * 2017-01-30 2018-08-01 Zumtobel Lighting GmbH Luminaire and (attachment-)optics for a luminaire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3354975A1 (en) * 2017-01-30 2018-08-01 Zumtobel Lighting GmbH Luminaire and (attachment-)optics for a luminaire
AT16999U1 (en) * 2017-01-30 2021-02-15 Zumtobel Lighting Gmbh

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