KR101548098B1 - Led light apparatus - Google Patents

Abstract

An LED light apparatus according to an embodiment of the present invention includes a transparent plate which sequentially includes a discoloration print layer and a passivation layer in the direction of a lower surface thereof; a side frame plate which is sealed along the edge of the transparent plate to be bonded; a printed circuit board which is formed on the lower part of the side frame plate by corresponding to the transparent plate, and has an LED chip mounted on an upper surface thereof by the medium of silicon optical bench (SiOB); and a heat sink which is formed on the lower side of the PCB.

Description

LED LIGHT APPARATUS

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED lighting apparatus, and more particularly, to an LED lighting apparatus in which a printing pattern is transparent or expressible according to a temperature or a temperature changed by light.

Conventionally, various light sources such as fluorescent lamps, neon lights, and halogens have been prevailing in the floodlight, landscape lighting, and advertisement lighting market. However, LEDs are becoming popular in recent years as a light source in these fields. The reason why the LED is spotlighted as a light source is due to the device characteristics of the LED.

Conventional light sources emit light using mercury or the like, but the LEDs are environmentally friendly because they do not use mercury, and the power consumption is reduced, thus the maintenance cost is saved. In addition, LEDs have a longer lifetime than conventional light sources, have excellent durability and are robust.

In addition, LEDs are becoming increasingly popular because they have improved luminosity and luminous efficiency, are driven by lower voltages and have no risk of electric shock. Especially, the applications of buildings and landscape lighting are increasing due to the application of LED and the colorful presentation effect.

In view of this, recently, an illumination device using LED as a light source has been proposed, and as a result of the development of technology, a light emitting diode which emits light with a low power consumption and a high luminance has been developed and its use is gradually spreading.

Particularly, the LED illumination device for a landscape illumination is provided outside the building or outside of the building, and functions as a lighting device while aesthetically beautifuling the landscape atmosphere.

However, such a LED illumination device for a landscape illumination does not function as a lighting device during the daytime, so that the interior structure is exposed and the aesthetic sense is deteriorated.

Patent Document: Japanese Patent Application Laid-Open No. 10-0891008

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an LED lighting device in which a printed pattern is expressed by a heat or light generated while a lighting function is performed, It is to provide a mechanism.

The LED lighting apparatus according to an embodiment of the present invention includes a translucent plate sequentially containing a discoloration printing layer and a passivation layer in the lower surface direction; A side frame plate sealingly joined along the rim of the translucent plate; A printed circuit board provided on the lower side of the side frame plate in correspondence with the transparent plate and having the LED chip mounted on the upper surface through respective silicon optical bench (SiOB); And a heat sink provided on a lower surface of the printed circuit board.

In the LED lighting apparatus according to the embodiment of the present invention, the printed circuit board includes a lower phosphor layer surrounding the LED chip on the upper surface thereof.

In the LED lighting apparatus according to the embodiment of the present invention, the side frame plate is provided with a side reflector and a side fluorescent film sequentially in the inward direction.

In the LED lighting apparatus according to an embodiment of the present invention, the discoloration printing layer is a layer containing a thermochromic ink or a photosensitive discoloring ink in the form of microcapsules.

The LED light fixture according to the embodiment of the present invention is characterized in that the thermosensitive color ink is Zion ink containing a stilbene derivative or ink containing C ₂₁ H ₁₆ N ₂ .

In the LED lighting apparatus according to the embodiment of the present invention, the photosensitive discolouration ink may include one of silver halide, spiropyran, spirooxazine, azo compound, and diarylethene .

In the LED lighting apparatus according to the embodiment of the present invention, the photosensitive discoloring ink includes a tungsten compound.

In the LED lighting apparatus according to the embodiment of the present invention, the lower phosphor film is formed of a film containing a plurality of phosphors of nanoparticles for converting the light generated from the LED chip into one of blue light, green light and red light. do.

In the LED lighting apparatus according to an embodiment of the present invention, the side fluorescent film is formed of a film containing a plurality of nanoparticles of fluorescent material for converting light generated from the LED chip into one of blue light, green light and red light. do.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed in a conventional, dictionary sense, and should not be construed as defining the concept of a term appropriately in order to describe the inventor in his or her best way. It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

The LED lighting apparatus according to the embodiment of the present invention can prevent the internal structure from being exposed during the daytime, which is not functioning as a lighting device, by using the color print layer, thereby improving the aesthetics and, while performing the function as the lighting apparatus, Thereby making it possible to perform a function as a lighting device for a landscape illumination.

1 is a perspective view of an LED lighting apparatus according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along AA of FIG. 1; FIG.
FIGS. 3A to 3C are exemplary views for explaining the operation of the LED lighting apparatus according to the embodiment of the present invention. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of an LED lighting apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, Are illustrative examples for explaining.

The LED lighting apparatus 100 according to the embodiment of the present invention is a rectangular type lighting apparatus comprising a translucent plate 110 having a discoloration print layer 113 and a passivation layer 115 on a lower surface thereof, A side frame plate 120 sealingly joined along the rim of the LED chip 150 and a light transmitting plate 110 provided on the lower side of the side frame plate 120 to correspond to the LED chip 150 via respective SiOB optical bench, And a heat sink 160 provided on a lower surface of the printed circuit board. The heat sink 160 is mounted on the lower surface of the printed circuit board. The printed circuit board includes a lower phosphor layer 130 surrounding the LED chip 150, do.

Specifically, the translucent plate 110 is a member that transmits light generated from the LED chip 150 or light passing through the phosphor film and protects against external factors. Considering such durability and transparency, the transparent plate 110 may be formed of, for example, polyethylene terephthalate (PET), polycarbonate (PC), polymethylmethacrylate (PMMA), polyethylene naphthalate (PEN) (PES), a cyclic olefin polymer (COC), a TAC (triacetylcellulose) film, a polyvinyl alcohol (PVA) film, a polyimide (PI) film, a polystyrene (PS), a biaxially oriented polystyrene oriented PS, BOPS), glass or tempered glass. In particular, polyethylene terephthalate (PET) may be used for transparency, strength and warpage of the transparent plate 110, and polycarbonate may be used when heat resistance and chemical resistance are required. Of course, the present invention is not limited thereto.

The discoloration print layer 113 is a layer which is colorless and transparent to discoloration due to heat or light, including designs such as letters, patterns, and designs. The discoloration print layer 113 is made of a heat discolouration ink or a photosensitive discoloration ink together with an anti- .

Specifically, the thermosensitive coloring ink may be Zion ink containing a stilbene derivative, which is an organic compound, or an ink containing C ₂₁ H ₁₆ N ₂ , which is colorless and discolored at 40 ° C or higher, for example.

The photosensitive discoloring ink is a material which is colorless and discolored by the light generated from the LED chip 150 by a predetermined light intensity or more as a material such as silver halide, Spiropyran, Spirooxazine, Azo compound, An organic compound such as tungsten compound, or an organic compound such as tungsten compound.

The anti-settling agent may be selected from, for example, silica, alumina, kaolinite, bentonite, dolomite, bayerite (BaSO ₄ ), calcium carbonate (CaCO ₃ ), Talc, titania, diatomaceous earth and the like. In particular, since the photosensitive discoloration ink is required to have reactivity to light, it is preferable to use a transparent silicone (anti-settling agent) such as silica. The anti-settling agent is preferably added in an amount of 0.1 to 3% by weight based on the total amount of the photosensitive discoloring ink.

 The passivation layer 115 is a layer that protects the discoloration print layer 113 during fabrication and construction, and is formed using any one or combination of acrylic polymer, urethane polymer, epoxy polymer, and siloxane polymer, can do.

The passivation layer 115 may be formed to have a transparent and thin thickness so as to transmit heat or light while protecting the discoloration print layer 113. Particularly, the thickness of the passivation layer 115 is thinner than the thickness of the discoloration print layer 113, and may be preferably in a range of 1/10 to 1/2 of the thickness of the discoloration print layer 113.

The side frame plate 120 may be sealingly joined along the rim of the light transmitting plate 110, and may include a side reflector and a side fluorescent film sequentially in the inward direction. Here, the side reflector may be made of silver (Silver) or titanium (Ti) having high reflection efficiency on the inner surface of a base material made of any one of stainless steel, brass, aluminum, and polyethylene terephthalate (TiO ₂ ) may be coated. Of course, the side reflector can be made of a silver or titanium coating without a base substrate.

The side surface phosphor film is a phosphor film for converting light generated from the LED chip 150 into light having a different wavelength. For example, a phosphor film of a nanoparticle for converting light generated from the LED chip 150 into blue light, green light, May be included.

Specifically, the fluorescent substance of the nanoparticles, for example BaMg2Al16O27 for blue fluorescence: Eu ^2+, SrGa2S4 Green Fluorescent: Eu ^2+, CdSe, InP, InGaP for the red phosphor, CuInS _2, (Sr, Ca) AlSiN _{3: Eu, CaAlSiN 3: Eu} , SrB4O7: Sm 2+ and SrS: Eu of the fluorescent material may comprise a series.

Particularly, the phosphor of the nanoparticle may include a garnet composition phosphor, and may include a YAG: Ga, Ce phosphor for green fluorescence or a YAG: Gd, Ce phosphor for red fluorescence.

Of course, as the green fluorescent dye, for example, chromium oxide (Cr ₂ O ₃ ), MnO, NiO, MoCl ₅ or BiI ₃ can be used as the green fluorescent dye, and WCl ₆ can be used as the blue fluorescent dye (Cu ₂ O), iron-based oxide (Fe ₂ O ₃ ), ZnTe, [Ru (bpy) ₃ ] Cl ₂ and PdCl ₂ can be used as the red fluorescent dye.

Such a side fluorescent film can convert light generated from the LED chip 150 into light including blue-green light or red light, and emit light having a color rendering property of sunlight including blue-green light or red light to the transparent plate 110 .

The LED chip 150 is mounted on an upper portion of a silicon optical bench (SiOB) provided on the upper surface of the printed circuit board and positioned higher than the lower phosphor film 130. By the structure of the SiOB and the LED chip 150 The outgoing light of the LED chip 150 is prevented from being blocked by the lower phosphor film 130, and the light conversion efficiency and the light emitting efficiency can be improved. Of course, a lens (not shown) may be additionally provided on an upper portion of the LED chip 150 to diffuse the outgoing light of the LED chip 150.

The lower phosphor film 130 is a phosphor film that converts light generated from the LED chip 150 into light having a different wavelength and converts light generated from the LED chip 150 into blue light, The phosphor particles of the present invention can be formed into a film containing a plurality of phosphors of nanoparticles.

The heat sink 160 may be provided on the lower surface of the printed circuit board 141 to support the printed circuit board or to discharge the heat transferred through the printed circuit board to the outside.

In the LED lighting apparatus 100 according to the embodiment of the present invention configured as described above, the design of characters, patterns, and designs of the color-change print layer 113 is developed while not functioning as a lighting device, And the design of characters, patterns, drawings, etc. of the color change print layer 113 disappears by heat or light, and the color change print layer 113 can be converted into a transparent state.

That is, as shown in FIG. 3A, in the LED lighting apparatus 100 according to the embodiment of the present invention, during the day when it does not function as a lighting device, the design of characters, patterns, It is possible to enhance the aesthetics of the LED lighting fixture 100 by covering the inner space including the chip 150.

3B, when the LED lighting apparatus 100 according to the embodiment of the present invention operates as a lighting device, the design of characters, patterns, drawings, and the like of the color-change printing layer 113 is performed on the LED chip 150, The color change print layer 113 starts to become transparent.

Thus, as shown in FIG. 3C, the LED lighting apparatus 100 according to the embodiment of the present invention fully functions as a lighting device, so that the design of letters, patterns, The light is totally vanished by the heat or light generated by the light source 150 and converted into a transparent state.

As the discoloration print layer 113 is thus converted into a transparent state, mixed light of both the light generated from the LED chip 150, the light reflected from the side fluorescent film and the light reflected from the lower fluorescent film 130 passes through the light transmitting plate 110). At this time, the LED lighting apparatus 100 according to the embodiment of the present invention can project light having the color rendering property of sunlight including blue-green light or red light, using the side fluorescent material film and the lower fluorescent material film 130. [

By the projection of the mixed light, the LED lighting apparatus 100 according to the embodiment of the present invention can perform a function as a lighting device for a landscape lighting provided on an outer ground, a building exterior side, or the like.

Therefore, the LED lighting apparatus 100 according to the embodiment of the present invention can prevent the internal structure from being exposed during the daytime when it does not function as a lighting device by using the discoloration printing layer 113, thereby improving the aesthetics, During the performance, the discoloration print layer 113 can be transparently converted to function as a lighting device for a landscape illumination.

Although the technical idea of the present invention has been specifically described according to the above preferred embodiments, it is to be noted that the above-described embodiments are intended to be illustrative and not restrictive.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention.

100: LED lighting device 110: translucent plate
113: discoloration printing layer 115: passivation layer
120: side frame plate 130: lower phosphor film
150: LED chip 160: heat sink

Claims (9)

A translucent plate sequentially containing a color change print layer and a passivation layer in the direction of the lower surface;
A side frame plate sealingly joined along the rim of the translucent plate;
A printed circuit board mounted on a lower surface of the side frame plate corresponding to the light transmitting plate and each LED chip mounted on an upper surface thereof;
A silicon optical bench (SiOB) provided between the LED chip and the printed circuit board ; And
A heat sink provided on a lower surface of the printed circuit board;
Lt; / RTI >
Wherein the printed circuit board surrounds the LED chip and has a lower phosphor film which is in contact with the SiOB and has a thickness lower than the height of the SiOB, on a top surface thereof.
delete The method according to claim 1,
Wherein the side frame plate comprises a side reflector and a side fluorescent film sequentially in an inward direction.
The method according to claim 1,
The discoloration printing layer
A thermochromic ink or a photosensitive discoloration ink in the form of microcapsules.
5. The method of claim 4,
Wherein the thermochromic ink comprises Zion ink containing stilbene derivative or ink including C ₂₁ H ₁₆ N ₂ .
5. The method of claim 4,
Wherein the photosensitive discoloring ink comprises any one of silver halide, spiropyran, spirooxazine, azo compound, and diarylethene.
5. The method of claim 4,
Wherein the photosensitive discoloring ink comprises a tungsten compound.
The method according to claim 1,
The lower phosphor film
And a film including a plurality of phosphors of nanoparticles for converting light generated from the LED chip into one of blue light, green light and red light.
The method of claim 3,
The side-
And a film including a plurality of phosphors of nanoparticles for converting light generated from the LED chip into one of blue light, green light and red light.

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