KR20140070997A - LED Lamp apparatus - Google Patents

LED Lamp apparatus Download PDF

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Publication number
KR20140070997A
KR20140070997A KR1020120138795A KR20120138795A KR20140070997A KR 20140070997 A KR20140070997 A KR 20140070997A KR 1020120138795 A KR1020120138795 A KR 1020120138795A KR 20120138795 A KR20120138795 A KR 20120138795A KR 20140070997 A KR20140070997 A KR 20140070997A
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KR
South Korea
Prior art keywords
light source
light
remote
substrate
layer
Prior art date
Application number
KR1020120138795A
Other languages
Korean (ko)
Inventor
김기철
서은성
손창균
Original Assignee
엘지이노텍 주식회사
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 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020120138795A priority Critical patent/KR20140070997A/en
Publication of KR20140070997A publication Critical patent/KR20140070997A/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
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/10—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by coatings
    • F21V3/12—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by coatings the coatings comprising photoluminescent substances
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • 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
    • F21Y2101/00—Point-like light sources

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

An illumination device according to an embodiment of the present invention includes a light source; A remote phosphor disposed at a distance from the light source; And a filtering unit disposed between the light source and the remote fluorescent material.

Description

[0001]

The present invention relates to a lighting apparatus applicable to a thin film optical system using an LED or a laser light source.

With the recent expansion of the electric vehicle and hybrid electric vehicle market, the development of light sources for low-power / high-efficiency vehicles without filaments is being actively pursued.

However, since the low-power / high-efficiency light sources use a low-wavelength light source that emits light with a relatively small spectral width, they must be converted to white light for practical use. In this conversion process, And a trustworthiness problem that is altered may occur.

In order to solve such a problem, there is a need to research a remote phosphor which can arrange a light source and a phosphor separately from each other. Such a remote phosphor has merits that are advantageous for improving reliability, but it has a problem that light efficiency is lowered due to the characteristic that the converted light diverges in all directions, and improvement is demanded.

US Patent No. 7,859,754 (Dec. 28, 2010)

An object of the present invention is to provide a lighting device having an improved structure so as to minimize thermal deformation of a phosphor.

An illumination device according to an embodiment of the present invention includes a light source; A remote phosphor disposed at a distance from the light source; And a filtering unit disposed between the light source and the remote fluorescent material.

According to an embodiment of the present invention, the filtering unit comprises: a substrate; A wavelength selection layer deposited on a surface of the substrate facing the light source; And an adhesive layer formed on a surface of the substrate facing the remote fluorescent substance and adhering the substrate to the remote fluorescent substance.

The substrate and the adhesive layer may be formed of a light transmitting material.

The wavelength selection layer may be formed by alternately laminating thin films having at least two different refractive indices, wherein each of the thin films has a thickness of 1 nm or more and is formed by a deposition process, a dipping process, or a spray coating process .

The wavelength selection layer may have a first layer having a first refractive index and a second layer having a second refractive index alternately arranged, and the first and second layers may be alternately stacked in a total of five or more layers.

According to the present invention, a filtering module capable of filtering a specific wavelength can be disposed on the surface or close to the surface of the remote fluorescent substance to increase the light transmittance of the light source incident on the remote fluorescent substance and to prevent the light source from returning to the direction in which the light source is incident It is possible to lower the system optical design difficulty.

In addition, since it is possible to control the divergence of the converted light converted from the remote phosphor in all directions (omni-directional), and to increase the output in a specific direction, the efficiency of the vehicle lamp system using the converted light can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a light path of a light source and converted light of a lighting apparatus according to an embodiment of the present invention;
2 schematically shows a lighting device according to a first embodiment of the present invention, Fig.
3 is a graph showing a spectrum of a wavelength selection layer according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing a light path of a light source and converted light of a lighting apparatus according to an embodiment of the present invention, FIG. 2 is a view schematically showing a lighting apparatus according to an embodiment of the present invention, and FIG. 3 is a graph showing a spectrum of a wavelength selection layer according to an embodiment of the present invention.

1, the lighting apparatus 1 according to the present invention may include a light source 10, a remote phosphor 20, and a filtering unit 100. [

The light source 10 may be an LED light source or a laser light source for forming light to be used in the lighting apparatus 1. [ According to a preferred embodiment of the present invention, the light source 10 is used in a vehicular lamp, and the full width at half maximum (FWHM) of the light source may be less than 40 nm. Reference symbol A denotes forming light formed in the light source 10.

The remote phosphor 20 is spaced apart from the light source 10 by a predetermined distance and an air gap may be formed between the light source 10 and the remote phosphor 20. The remote phosphor 20 can form the converted light B by converting the low-wavelength forming light A emitted by the light source 10 to a thin spectrum width into white light. The converted light B converted from the remote phosphor 20 can be diverted to the four sides with respect to the center point as shown in FIG. At this time, the converted light B emitted toward the light source 10 can be reflected by the filtering unit 100 to adjust the moving direction of the light in a specific direction.

The filtering unit 100 may be formed as a separate component from the remote phosphor 20 or may be integrally formed on a part of the surface of the remote phosphor 20.

According to an embodiment of the present invention, the filtering unit 100 may be installed in a state of being in surface contact with a surface of the remote phosphor 20 facing the light source 10. In this case, the filtering unit 100 may be disposed at a position where the forming light A formed in the light source 10 is incident on the remote fluorescent body 20. [

The filtering unit 100 may include a substrate 110, an adhesive layer 120, and a wavelength selection layer 130.

The substrate 110 may be formed of a light transmissive material, a glass substrate, a resin material, or the like. The substrate 110 may be formed of any material that can be formed by sputtering or a deposition process.

The adhesive layer 120 may be formed of a light transmissive material so that light passing through the substrate 110 can be transmitted to the remote fluorescent substance 20. For example, the adhesive layer 120 may be formed of any one of PMMA, A-PET, PETG, and PC as a transparent polymer sheet, and any material may be used as long as it has good light-transmitting performance.

The wavelength selection layer 130 is provided for filtering a specific wavelength region in the formation light A entering the remote fluorescent substance 20. According to an embodiment of the present invention, Or may be provided in the form of a thin film or a periodic lattice having one or more layers having different refractive indices.

According to an embodiment of the present invention, the wavelength selection layer 130 may have a structure such that the angle at which the light amount of the maximum wavelength of the light source 10 enters the wavelength selection layer 130 may be less than 45 degrees from the surface normal. Can be formed. For this, the wavelength selection layer 130 may be formed by depositing at least two or more layers of thin films having a thickness of 1 nm or more, and may be formed on the surface of the substrate 110 by a deposition process. At this time, the plurality of thin films forming the wavelength selection layer 130 may be formed to have different refractive indexes from the other thin films adjacent to each other. For example, a first layer having a first refractive index and a second layer having a second refractive index are alternately stacked and deposited to a thickness of 5 to 30 layers to form the wavelength selection layer 130. According to one embodiment of the present invention, the wavelength selection layer 130 may be formed by forming a thin film in the form of [(L / 2) H (L / 2)] S , and a material such as TiO 2 or SiO 2 As shown in FIG.

According to such a wavelength selection layer 130, the transmittance of the center wavelength I_max of the forming light A of the light source entering the substrate 110 bonded to the remote fluorescent substance 20 can be increased, The reflectance of the converted light B converted into the wavelength inside the light source 20 can also be increased.

A feature of the embodiment of the present invention is that a space portion is formed between the light source 10 and the remote phosphor 20 so that they are spaced apart by a certain distance. However, in one embodiment, the wavelength selection layer 130 is disposed in a surface-contact state in the incident light A of the remote phosphor 20.

FIG. 3 is a graph showing a spectrum of the wavelength selection layer 130 according to the embodiment. The x-axis of the graph is the wavelength (nm) and the y-axis is the transmittance (%).

As shown in the graph, the wavelength of the converted light (B) having a wavelength of 470 nm or more converted by the remote phosphor (20) is maximized when the wavelength of the light of the light source (10) Can be reflected as much as possible,

Therefore, the converted light B can be efficiently formed in the lighting apparatus 1 even when the light source 10 and the remote phosphor 20 are spaced apart from each other. Particularly, the light source 10 and the remote phosphor 20 are spaced apart from each other by a predetermined distance There is no fear that the reliability of the remote phosphor 20 deteriorates / deteriorates due to high-temperature / high-concentration low-wavelength light.

Particularly, since the conversion light B converted from the remote phosphor 20 can be controlled to be diverged in all directions (omni-directional) by using the filtering unit 100, Direction can be maintained and the output of the light can be increased. Therefore, the efficiency of the lighting apparatus can be improved by being applied to a vehicular lamp system requiring conversion light.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

One; A lighting device 10; Light source
20; Remote phosphor 100; Filtering unit
110; Substrate 120; Adhesive layer
130; A wavelength selection layer 140; Anti-reflective coating layer
150; Space portion

Claims (7)

Light source;
A remote phosphor disposed at a distance from the light source; And
And a filtering unit disposed between the light source and the remote phosphor.
The apparatus of claim 1, wherein the filtering unit comprises:
Board;
A wavelength selection layer deposited on a surface of the substrate facing the light source; And
And an adhesive layer formed on a surface of the substrate facing the remote fluorescent substance and adhering the substrate to the remote fluorescent substance.
3. The method of claim 2,
Wherein the substrate and the adhesive layer are formed of a light-transmitting material.
The optical information recording medium according to claim 2,
Wherein thin films having at least two different refractive indices are alternately stacked.
The optical information recording medium according to claim 4,
Wherein each thin film has a thickness of 1 nm or more.
The optical information recording medium according to claim 2,
A deposition process, an enameling process, and a spray coating process.
The optical information recording medium according to claim 2,
A first layer having a first refractive index and a second layer having a second refractive index are alternately arranged,
Wherein the first and second layers are alternately stacked in five or more layers.
KR1020120138795A 2012-12-03 2012-12-03 LED Lamp apparatus KR20140070997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120138795A KR20140070997A (en) 2012-12-03 2012-12-03 LED Lamp apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120138795A KR20140070997A (en) 2012-12-03 2012-12-03 LED Lamp apparatus

Publications (1)

Publication Number Publication Date
KR20140070997A true KR20140070997A (en) 2014-06-11

Family

ID=51125600

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120138795A KR20140070997A (en) 2012-12-03 2012-12-03 LED Lamp apparatus

Country Status (1)

Country Link
KR (1) KR20140070997A (en)

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