KR102531370B1 - Lighting device - Google Patents

Abstract

The present invention includes a light emitting unit including a substrate and at least one or more light sources; At least one first wavelength conversion layer for changing the wavelength of light output from the light source; and a reflective film that reflects irradiated light, wherein the reflective film includes at least one opening area positioned in an area corresponding to the light source, and the first wavelength conversion layer is positioned in a location corresponding to the opening area. A width of the opening area is greater than that of the light source, and a wavelength of light output from the light source is changed by the first wavelength conversion layer and output to a light exit unit.

Description

Lighting device {Lighting device}

The following embodiments relate to lighting devices.

Quantum dot refers to ultra-fine semiconductor particles with a diameter of several nanometers or less. Quantum dots emit light of various wavelengths depending on the size of the particle, so they can be used in various applications such as displays, solar cells, and computers. being used in the field. The quantum dots are supported on a resin in the form of a film and implemented as a quantum dot film.

A film or the like including a wavelength conversion material may be used for light modulation in a lighting device. In order to improve the light efficiency and color rendering of the lighting device, there is an increasing demand for disposing a film or the like including a wavelength conversion material in a configuration provided in the lighting device.

One object of the present invention is to provide a lighting device that emits light with improved color rendering properties by changing the wavelength of light by a wavelength conversion layer including at least one of quantum dots and phosphors.

According to one embodiment of the present invention, the lighting device includes a light emitting unit including a substrate and at least one or more light sources; At least one first wavelength conversion layer for changing the wavelength of light output from the light source; and a reflective film that reflects irradiated light, wherein the reflective film includes at least one opening area positioned in an area corresponding to the light source, and the first wavelength conversion layer is positioned in a location corresponding to the opening area. formed, the first wavelength conversion layer is located spaced apart from the light source, the width of the opening area is larger than the width of the light source, and the wavelength of light output from the light source is changed by the first wavelength conversion layer It may be a lighting device that is output to the light exit unit.

The solutions to the problems of the present invention are not limited to the above-described solutions, and solutions not mentioned will be clearly understood by those skilled in the art from this specification and the accompanying drawings. You will be able to.

The lighting device according to an embodiment of the present invention can indirectly radiate the light output from the light emitting unit to the outside, thereby preventing a user from being dazzled. The lighting device according to an embodiment of the present invention may externally radiate light having a changed wavelength, and thus, color rendering of the lighting device may be improved. The light efficiency of the lighting device according to an embodiment of the present invention may be improved due to the reflective film positioned therein.

The effect of the present invention is not limited to the above-mentioned effects, and effects not mentioned will be clearly understood by those skilled in the art from this specification and the accompanying drawings.

1 is a view showing the overall structure of a lighting device according to a first embodiment.
2 is an exploded view of the lighting device according to the first embodiment.
3 and 4 are cross-sectional views of the lighting device according to the first embodiment.
5 is a cross-sectional view of a lighting device according to a second embodiment.
6 is a diagram illustrating a light path of a lighting device according to a second embodiment.
7 is a cross-sectional view of a lighting device according to a third embodiment.
8 is a cross-sectional view of a lighting device according to a fourth embodiment.
9 is a cross-sectional view of a lighting device according to a fifth embodiment.
10 is a cross-sectional view of a lighting device according to a sixth embodiment.
11 is a view showing a conventional lighting device.
12 and 13 are diagrams illustrating a lighting device according to an embodiment of the present invention.
14 is a diagram showing a conventional lighting device.
15 is a diagram illustrating a lighting device according to an embodiment of the present invention.
16 is a view showing a conventional lighting device.
17 is a diagram illustrating a lighting device according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention may add, change, delete, etc. other elements within the scope of the same spirit, through other degenerative inventions or the present invention. Other embodiments included in the scope of the inventive idea can be easily suggested, but it will also be said to be included in the scope of the inventive concept.

In addition, components having the same function within the scope of the same idea appearing in the drawings of each embodiment are described using the same reference numerals.

According to an embodiment of the present invention, a light emitting unit including a substrate and at least one or more light sources; At least one first wavelength conversion layer for changing the wavelength of light output from the light source; and a reflective film that reflects irradiated light, wherein the reflective film includes at least one opening area positioned in an area corresponding to the light source, and the first wavelength conversion layer is positioned in a location corresponding to the opening area. The opening area may be wider than the light source, and the wavelength of the light emitted from the light source may be changed by the first wavelength conversion layer and output to the light exit unit.

In addition, the reflective film includes a first surface and a second surface, the first surface of the reflective film is a surface facing the light emitting unit, and the second surface of the reflective film faces the light emitting unit, is the side on which it is located,

The first wavelength conversion layer includes an upper surface and a lower surface, the upper surface of the first wavelength conversion layer is positioned facing the light emitting part, and the lower surface of the first wavelength conversion layer is positioned facing the light emitting part. and the opening area is formed penetrating between the first and second surfaces of the reflective film, a lighting device may be provided.

In addition, the first wavelength conversion layer is formed to fill at least a portion of the opening area, the lighting device may be provided.

In addition, the upper surface of the first wavelength conversion layer is located on the same plane as the second surface of the reflective film, and the lower surface of the first wavelength conversion layer is located on the same plane as the first surface of the reflective film. A device may be provided.

In addition, the first wavelength conversion layer includes at least one second wavelength conversion layer, the second wavelength conversion layer includes an upper surface and a lower surface, and the upper surface of the second wavelength conversion layer faces the light emitting unit, A surface positioned, a lower surface of the second wavelength conversion layer is a surface positioned facing the light emitting unit, and the second wavelength conversion layer is formed at a position corresponding to the reflective film, a lighting device may be provided. .

In addition, the first wavelength conversion layer is formed while being in contact with the second wavelength conversion layer, the upper surface of the first wavelength conversion layer is located on the same plane as the first surface of the reflective film, the first wavelength conversion layer The lower surface of the second wavelength conversion layer and the lower surface of the second wavelength conversion layer and located on the same plane, the lighting device may be provided.

In addition, the second wavelength conversion layer is formed while contacting the first surface of the reflective film, the lighting device may be provided.

In addition, the first wavelength conversion layer is integrally formed with the second wavelength conversion layer, the lighting device may be provided.

In addition, the first wavelength conversion layer is formed to fill at least a part of the opening area, the second wavelength conversion layer is formed while contacting the reflective film, and the first wavelength conversion layer and the second wavelength conversion layer are A lighting device formed while contacting may be provided.

In addition, the upper surface of the first wavelength conversion layer is located on the same plane as the second surface of the reflective film, the upper surface of the second wavelength conversion layer is formed while contacting the first surface of the reflective film, and the first A lower surface of the wavelength conversion layer and a lower surface of the second wavelength conversion layer are positioned on the same plane, and the lighting device may be provided.

In addition, the upper surface of the first wavelength conversion layer is located on the same plane as the upper surface of the second wavelength conversion layer, the lower surface of the first wavelength conversion layer is located on the same plane as the first surface of the reflective film, A lower surface of the second wavelength conversion layer is formed while contacting the second surface of the reflective film, and a lighting device may be provided.

In addition, the first wavelength conversion layer and the second wavelength conversion layer are formed in contact with each other, the second wavelength conversion layer is located in a partial region of the reflective film, and the second wavelength conversion layer is adjacent to the opening region. A lighting device positioned to be spaced apart from the formed second wavelength conversion layer may be provided.

In addition, the upper surface of the first wavelength conversion layer is located on the same plane as the second surface of the reflective film, the upper surface of the second wavelength conversion layer is formed while contacting the first surface of the reflective film, and the first A lower surface of the wavelength conversion layer may be provided with a lighting device positioned on the same plane as the lower surface of the second wavelength conversion layer.

In addition, the lower surface of the first wavelength conversion layer is located on the same plane as the first surface of the reflective film, and the lower surface of the second wavelength conversion layer is formed while contacting the second surface of the reflective film, and the first An upper surface of the wavelength conversion layer may be provided with a lighting device positioned on the same plane as an upper surface of the second wavelength conversion layer.

In addition, a distance between the light source and the wavelength conversion layer may be shorter than a height of the light source, and a distance between the light source and the wavelength conversion layer may be shorter than a thickness of the reflective film.

In addition, the first wavelength conversion layer may be provided with a lighting device including at least one or more of quantum dots, phosphors, and nano phosphors.

In addition, at least a portion of the light output from the light source is first light emitted to the light emitting unit through the first wavelength conversion layer and through the aperture, and at least a portion of the light output from the light source is the first light emitted from the reflective film. Second light that is reflected from the second wavelength conversion layer and the substrate located on the first surface and exits to the light emitting unit through the first wavelength conversion layer and through the aperture, and the intensity of each wavelength of the first light An illumination device having different intensities for each wavelength of the second light may be provided.

1 is a view showing the overall structure of a lighting device according to a first embodiment. 2 is an exploded view of the lighting device according to the first embodiment. 3 and 4 are cross-sectional views of the lighting device according to the first embodiment.

Referring to FIGS. 1 to 4 , the lighting device 1 according to the first embodiment of the present application may radiate light to the outside. The lighting device 1 may indirectly radiate light to the outside. In addition, the lighting device 1 may radiate light adjacent to white light to the outside.

The lighting device 1 may include a light emitting part 100 , a light emitting part 200 , a reflective film 300 , a first wavelength conversion layer 410 and a side part 500 .

The light emitting unit 100 may output light.

The light emitting part 100 may include a substrate 110 and a light source 120 . The light source 120 may be formed on the substrate 110 and output light.

The substrate 110 is a plane constituting the overall structure of the light emitting part 100 and may be made of a hard material. The substrate 110 may be provided in various forms. The substrate may be circular, rectangular, or any other shape. The shape of the substrate 110 may vary according to the overall structure of the lighting device 1 .

The light source 120 may be positioned on the substrate 110 . The substrate 110 may be provided in a form including the light source 120 . The board 110 may be provided in the form of a PCB board (printed circuit board) including the light source 120 .

The light source 120 may be positioned on the substrate 110 .

The light source 120 may output light. When voltage is supplied to the light source 120, the light source 120 may output light. The light source 120 may output light of various bands of wavelengths. The light source 120 may output light of a wavelength of various bands, but may output light having the strongest peak of a wavelength of a specific band. The light source 120 may output light having a wavelength of a blue band. The light source 120 can output light of a wavelength of a blue band, and the light of a wavelength of the blue band has the highest energy in the visible light band and can be modulated into various types of light, so that the light of the lighting device 1 Color reproducibility can be improved. The light source 120 may be an LED light source. The height of the light source 120 may be about 450 μm.

The light source 120 may be disposed parallel to the plane of the substrate 110 or inclined at a predetermined angle.

The light source 120 may be plural. The plurality of light sources 120 may be spaced apart from each other by a predetermined distance on the substrate 110 . The plurality of light sources 120 may be spaced apart from each other by a predetermined distance while penetrating the substrate 110 .

The light emitting unit 200 is configured to radiate the light output from the light emitting unit 100 to the outside, and may be disposed to face each other with the light emitting unit 100 . The light emitting part 100 and the light emitting part 200 are arranged to face each other, but may be spaced apart from each other at a predetermined interval. The light emitting part 100 and the light emitting part 200 are disposed to face each other, and the center of the light emitting part 100 and the center of the light emitting part 200 may be spaced apart from each other at a predetermined interval. The light emitting part 100 and the light emitting part 200 are disposed to face each other, and a plane of the light emitting part 100 and a plane of the light emitting part 200 may be spaced apart from each other at a predetermined interval. A plane of the light emitting unit 100 and a plane of the light emitting unit 200 may be parallel to each other, but spaced apart from each other at a predetermined interval. The light emitting part 100 and the light emitting part 200 are arranged to face each other, and the center of the light emitting part 100 corresponds to the center of the light emitting part 200, and the plane of the light emitting part 100 and the center of the light emitting part 100 correspond to each other. Planes of the light emitting units 200 may be arranged parallel to each other but spaced apart from each other at a predetermined interval.

The light exit unit 200 may be formed of a translucent material. Accordingly, the light is radiated to the outside, but the internal shape of the lighting device 1 may not be visually recognized by the user.

The light emitting part 200 may include a material capable of transmitting or diffusing the light output from the light emitting part 100 .

The light exit unit 200 may be provided in various forms. The light output unit 200 may have a circular shape, a rectangular shape, or other shapes. The shape of the light emitting unit 200 may vary according to the overall structure of the lighting device 1 . The light emitting part 200 may have a shape corresponding to the shape of the light emitting part 100 .

The reflective film 300 may be positioned between the light emitting part 100 and the light emitting part 200 . The reflective film 300 may be positioned adjacent to the light emitting part 100 .

The reflective film 300 may be disposed to face the light emitting part 100 . The reflective film 300 and the light emitting part 100 are arranged to face each other, but may be spaced apart from each other at a predetermined interval. The reflective film 300 and the light emitting part 100 are disposed to face each other, and the center of the reflective film 300 and the center of the light emitting part 100 may be spaced apart from each other at a predetermined interval. The reflective film 300 and the light emitting part 100 are disposed to face each other, and a plane of the reflective film 300 and a plane of the light emitting part 100 may be spaced apart from each other at a predetermined interval. The plane of the reflective film 300 and the plane of the light emitting unit 100 may be parallel to each other, but spaced apart from each other by a predetermined interval. The reflective film 300 and the light emitting part 100 are disposed to face each other, and the center of the reflective film 300 and the center of the light emitting part 100 correspond to each other, and the plane of the reflective film 300 and the light emitting part 100 correspond to each other. Planes of the light emitting units 100 may be arranged parallel to each other but spaced apart at predetermined intervals.

The reflective film 300 may be disposed to face the light emitting part 200 . The reflective film 300 and the light emitting part 200 are arranged to face each other, but may be spaced apart from each other at a predetermined interval. The reflective film 300 and the light emitting part 200 are disposed to face each other, and the center of the reflective film 300 and the center of the light emitting part 200 may be spaced apart from each other at a predetermined interval. The reflective film 300 and the light emitting part 200 are disposed to face each other, and a plane of the reflective film 300 and a plane of the light emitting part 200 may be spaced apart from each other at a predetermined interval. The plane of the reflective film 300 and the plane of the light emitting unit 200 may be parallel to each other, but spaced apart from each other by a predetermined interval. The reflective film 300 and the light emitting part 200 are disposed to face each other, and the center of the reflective film 300 and the center of the light emitting part 200 correspond to each other, and the plane of the reflective film 300 and the light emitting part 200 correspond to each other. Planes of the light emitting units 200 may be arranged parallel to each other but spaced apart from each other at a predetermined interval.

The reflective film 300 may be positioned in an area corresponding to the entire area of the light emitting unit 100 or in an area corresponding to a partial area of the light emitting unit 100 . The reflective film 300 may be located in an area corresponding to the entire area of the light emitting part 200 or in an area corresponding to a partial area of the light emitting part 200 .

The reflective film 300 may include a first surface 310 and a second surface 320 . The first surface 310 of the reflective film may be a surface positioned facing the light emitting part 100 . The second surface 320 of the reflective film may be a surface positioned facing the light exit part 200 . The first surface 310 of the reflective film and the second surface 320 of the reflective film may be parallel to each other.

The reflective film 300 may reflect light output from the light emitting unit 100 . The reflective film 300 may be made of a material capable of reflecting light. The reflective film 300 may be made of an opaque material.

The reflective film 300 may be formed of a single member made of a reflective material.

Alternatively, although not shown in this drawing, the reflective film 300 may be formed of two or more members. In this case, the reflective film 300 may include a film member defining the structure of the reflective film 300 and a reflective layer applied on the film member. The reflective layer may be formed of an adhesive material, and the reflective layer may be adhered to the film member to form the reflective film 300 .

The thickness of the reflective film 300 may be about 180 μm.

The reflective film 300 may include an opening area 330 . The opening area 330 may be formed penetrating the reflective film 300 . The opening area 330 may be formed to pass through the first surface 310 of the reflective film and the second surface 320 of the reflective film. The opening area 330 may be an empty space formed in the reflective film 300 . The opening area 330 may have a circular shape, a rectangular shape, or other shapes.

The opening area 330 may be formed at a position corresponding to the light source 120 . An area of the opening area 330 may be larger than that of the light source 120 . The number of opening areas 330 may be plural. The number of the opening areas 330 may correspond to the number of the light sources 120 .

The first wavelength conversion layer 410 may be positioned between the light emitting part 100 and the light emitting part 200 .

The first wavelength conversion layer 410 may be disposed to face the light emitting part 100 . The first wavelength conversion layer 410 and the light emitting part 100 are disposed to face each other, but may be disposed while contacting the light emitting part 100 or may be spaced apart from each other at a predetermined interval. The first wavelength conversion layer 410 and the light emitting part 100 are disposed to face each other, and a plane of the first wavelength conversion layer 410 and a plane of the light emitting part 100 may be disposed while being in contact with each other, , and may be arranged spaced apart at predetermined intervals. The plane of the first wavelength conversion layer 410 and the plane of the light emitting part 100 may be disposed parallel to each other while contacting each other, or may be spaced apart from each other at a predetermined interval.

The first wavelength conversion layer 410 may be disposed to face the light emitting part 200 . The first wavelength conversion layer 410 and the light emitting part 200 are arranged to face each other, but may be spaced apart from each other at a predetermined interval. The first wavelength conversion layer 410 and the light emitting part 200 are disposed to face each other, and a plane of the first wavelength conversion layer 410 and a plane of the light emitting part 200 are spaced apart at a predetermined interval. can be placed. A plane of the first wavelength conversion layer 410 and a plane of the light emitting part 200 may be parallel to each other, but spaced apart from each other by a predetermined interval.

The first wavelength conversion layer 410 may be positioned to correspond to the light emitting part 100 . The first wavelength conversion layer 410 may be positioned to correspond to the light source 120 . An area of the first wavelength conversion layer 410 may be larger than that of the light source 120 .

Since the width of the first wavelength conversion layer 410 is larger than the width of the light source 120, the first wavelength conversion layer 410 can receive as much light output from the light source 120 as possible, , The first wavelength conversion layer 410 can change the wavelength of the input light and output it to the light emitting unit 200 . That is, due to the structure in which the width of the first wavelength conversion layer 410 is larger than the width of the light source 120, while minimizing the loss of light output from the light source 120, efficiency can be achieved.

The first wavelength conversion layer 410 may be positioned adjacent to the reflective film 300 . The first wavelength conversion layer 410 may be positioned while being in contact with the reflective film 300 . The first wavelength conversion layer 410 may be positioned while contacting a portion of the reflective film 300 .

The first wavelength conversion layer 410 may be formed at a position corresponding to the opening area 330 . The first wavelength conversion layer 410 may be formed while filling at least a portion of the opening area 330 . The wavelength conversion layer 410 may be formed while filling the entire opening area 330 .

Since the first wavelength conversion layer 410 is formed in an area corresponding to the opening area 330 and the area of the opening area 330 is greater than the area of the light source 120, the reflection corresponding to the light exit portion Compared to a conventional lighting device in which a colored wavelength conversion layer is located over the entire area of a film, the first wavelength conversion layer 410 is minimally visible to the user and at the same time loss of light output from the light source 120 is reduced. It is possible to promote the efficiency of the lighting device 1 by minimizing it.

The first wavelength conversion layer 410 may output by changing the wavelength of incident light. The first wavelength conversion layer 410 may receive light output from the light emitting unit 100, change the wavelength of the input light, and output the light. When the first wavelength conversion layer 410 receives light having a specific wavelength and high intensity from the light emitting unit 100, the first wavelength conversion layer 410 changes the wavelength of at least a part of the input light and outputs the light. By doing so, the color rendering of the light output to the light emitting unit 200 can be improved. Light passing through the first wavelength conversion layer 410 may have a higher color rendering index than light that does not pass through the first wavelength conversion layer 410 . Therefore, by using the lighting device 1 that emits light passing through the first wavelength conversion layer 410, the user can directly recognize the color of the object compared to the case of using a conventional lighting device, Eye strain can be reduced.

The first wavelength conversion layer 410 may include a wavelength conversion material. The first wavelength conversion layer 410 may include at least one of quantum dots and phosphors. The first wavelength conversion layer 410 may be colored or colorless.

The first wavelength conversion layer 410 may include the quantum dots. The number of quantum dots may be multiple. The quantum dots may be a material configured to emit light of a specific wavelength band. The quantum dot and the phosphor may emit light of a specific wavelength band by receiving predetermined energy.

The quantum dot is a nano-sized semiconductor material and has a quantum confinement effect. Based on the quantum confinement effect, the quantum dots can emit light. The quantum dot absorbs light from an excitation source, and when it reaches an energy excited state, it self-radiates energy corresponding to an energy band gap of the quantum dot. The quantum dots receive a predetermined light to have active electrons (excitation electrons), and when the active electrons are stabilized, energy is released.

The quantum dots may have various energy band gaps depending on the size of the quantum dots or material composition of the quantum dots. The quantum dots may emit light of a specific wavelength band corresponding to the energy band gap. The size or material composition of the quantum dots may be changed so that the quantum dots can emit light of the specific wavelength band.

The quantum dot may be implemented with a predetermined compound. The predetermined compound may be at least one of a group II-VI compound, a group III-V compound, and a group IV-VI compound.

The II-VI compound is a binary element compound such as CdSe, CdTe, ZnS, ZnTe, ZnO, HgS, HgSe, HgTe, etc. or CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, Ternary compounds such as CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe or quaternary compounds such as HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe It can be selected from the group consisting of.

The group III-V compound is a binary element compound such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, or GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, Ternary compounds such as AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP or GaAlNAs, GaAlNsb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb It may be selected from the group consisting of quaternary compounds such as

The group IV compound may be selected from the group consisting of single-element compounds such as Si and Ge or two-element compounds such as SiC and SiGe.

The quantum dots may have a core-shell structure. The quantum dots of the core-shell structure may include a quantum core and a quantum shell.

The quantum core may emit light based on quantum confinement effects. The quantum shell may cover the quantum core. The quantum shell may protect the quantum core. The quantum shell can prevent the energy band of the quantum core from being changed. Meanwhile, the quantum core and the quantum shell may be implemented with the above compounds.

The quantum dots may further include a ligand. The ligand may be formed on the surface of the quantum dot. The ligand may be attached to the surface of the quantum shell. The ligand may be a compound that coordinates bonding by providing a shared electron pair to the quantum dot.

The first wavelength conversion layer 410 may include the phosphor. The phosphor may be a material having fluorescence, and there is no particular limitation thereto. The phosphor may be a material having a nano size. The phosphor included in the first wavelength conversion layer 410 may preferably be an inorganic phosphor.

The inorganic phosphor may have a predetermined size. The inorganic phosphor may have a size of 1 μm to 20 μm. The diameter of the inorganic phosphor may have a size of 1 um to 20 um.

The inorganic phosphor is (Y,Tb)3Al5O12:Ce3+, (Sr,Ba,Ca)2Si5N8:Eu2+, CaAlSiN3:Eu2+, BaMgAl10O17:Eu2+, BaMgAl10O17:Eu2+,Mn2+, Ca-α-SiAlON:Eu2+, -SiAlON:Eu2+ , (Ca,Sr,Ba)2P2O7:Eu2+,Mn2+, (Ca,Sr,Ba)5(PO4)3Cl:Eu2+, Lu2SiO5:Ce3+, (Ca,Sr,Ba)3SiO5:Eu2+, (Ca,Sr,Ba) )2SiO4:Eu2+, Zn2SiO4:Mn2+, BaAl2O19:Mn2+, BaMgAl14O23:Mn2+, SrAl12O19:Mn2+, CaAl12O19 Mn2+, YBO3:Tb3+, LuBO3:Tb3+, Y2O3:Eu3+, Y2SiO5:Eu3+, Y3Al5O1 2: Eu3+, YBO3: Eu 3+, Y0.65Gd0.35BO3:Eu3+, GdBO3:Eu3+, YVO4:Eu3+, and (Y,Gd)3(Al,Ga)5 O12:Ce3+ may be at least one of phosphors.

The first wavelength conversion layer 410 may be formed in contact with the light source 120 or may be spaced apart from the light source 120 at a predetermined distance. The first wavelength conversion layer 410 may be spaced apart from the light source 120 by a distance smaller than the thickness of the reflective film 300 . The first wavelength conversion layer 410 may be spaced apart from the light source 120 by a distance smaller than the thickness of the light source 120 .

A distance between the first wavelength conversion layer 410 and the light source 120 may be smaller than a thickness of the light source 120 . By arranging the distance between the first wavelength conversion layer 410 and the light source 120 to be smaller than the thickness of the light source 120 , loss of light output to the light emitting unit 200 can be prevented. Accordingly, the efficiency of the lighting device 1 can be increased.

When the distance between the first wavelength conversion layer 410 and the light source 120 is greater than the thickness of the light source 120, the distance between the first wavelength conversion layer 410 and the light source 120 Compared to arranging the light source 120 to be smaller than the thickness of the light source 120, the specific gravity of the light incident on the first surface 310 of the reflective film and output to the light exit unit 200 after being reflected multiple times is increased. Light loss occurs due to reflection by the reflective film 300, and thus the efficiency of the lighting device 1 may be lowered.

The first wavelength conversion layer 410 may be positioned apart from the light source 120 while having a distance of 18 μm to 20 μm.

By disposing the first wavelength conversion layer 410 and the light source 120 to have a distance of 18 μm to 20 μm, the first wavelength conversion layer 410 is heated by the thermal energy generated from the light source 120. ) can be prevented from being damaged.

When the distance between the first wavelength conversion layer 410 and the light source 120 is less than 18 μm to 20 μm, or when the first wavelength conversion layer 410 is placed in contact with the light source 120 , The first wavelength conversion layer 410 directly receives thermal energy generated from the light source 120 . This damages the first wavelength conversion layer 410 and causes the wavelength of the light output from the light source 120 to be output to the light emitting unit 200 without being changed, so that the color rendering property is improved. ) It becomes impossible to achieve the object of the present invention to provide.

That is, the distance of 18 μm to 20 μm minimizes the loss of light output from the light source 120 while minimizing damage to the first wavelength conversion layer 410 by thermal energy generated from the light source 120. Thus, it may be a minimum distance that allows light whose wavelength is changed by the first wavelength conversion layer 410 to be emitted through the opening area 330 .

The first wavelength conversion layer 410 may include an upper surface 411 and a lower surface 412 . The upper surface 411 of the first wavelength conversion layer may be a surface positioned facing the light emitting part 200, and the lower surface 412 of the first wavelength conversion layer may be positioned facing the light emitting part 100. It can be cotton. An upper surface 411 and a lower surface 412 of the first wavelength conversion layer 410 may be parallel to each other.

The upper surface 411 of the first wavelength conversion layer may be positioned on the same plane as the second surface 320 of the reflective film, and the lower surface 412 of the first wavelength conversion layer may be positioned on the first surface of the reflective film. It may be located on the same plane as face 310 .

In this case, the user can view only the first wavelength conversion layer 410 located in the opening area 330 . Even if the user cannot accurately see the internal structure of the lighting device 1 through the light emitting unit 200, the user can see the first wavelength conversion layer 410 only in a partial area where the opening area 330 is located. Color can be seen. Since the colored first wavelength conversion layer 410 is located only in a portion of the region from which light is substantially emitted, this is compared to a conventional lighting device in which the colored wavelength conversion layer is located in the entire region of the reflective film corresponding to the light exit portion. Compared to this, the user may perceive less color of the first wavelength conversion layer 410 .

The side part 500 may be disposed between the light emitting part 100 and the light emitting part 200 . The side part 500 is disposed between the light emitting part 100 and the light emitting part 200, and may be connected between the light emitting part 100 and the light emitting part 200. The side part 500 may be disposed between the light emitting part 100 and the light emitting part 200 and may be disposed to surround the light emitting part 100 and the light emitting part 200 . The side part 500 may be disposed to surround the light emitting part 100 and the light emitting part 200 such that a plane of the light emitting part 100 and a plane of the light emitting part 200 are parallel. The side part 500 may have a rectangular or cylindrical shape or a fan shape, so that the plane of the light emitting part 100 and the plane of the light emitting part 200 are parallel to each other. ) and the light output unit 200 may be disposed.

The side part 500 may be made of a material capable of protecting the side surface of the lighting device 1 . The side part 500 may serve as a housing protecting the side surface of the lighting device 1 . The side part 500 may be disposed to surround the light emitting part 100 and the light emitting part 200, and the side part 500 is a housing including the light emitting part 100 and the light emitting part 200. It may be one area of .

The side part 500 may extend to correspond to a direction in which the light emitting part 100 and the light emitting part 200 face each other. The side part 500 may extend to form an acute angle or an obtuse angle based on a direction in which the light emitting part 100 and the light emitting part 200 face each other. The side part 500 may extend perpendicular to the plane of the light emitting part 100 and the plane of the light emitting part 200 . The side part 500 may extend to form an acute angle with respect to the plane of the light emitting part 100 and form an obtuse angle with respect to the plane of the light emitting part 200 . The side part 500 may extend so that an obtuse angle is formed with respect to the plane of the light emitting part 100 and an acute angle is formed with respect to the plane of the light emitting part 200 .

When the side part 500 is formed to be perpendicular to the plane of the light emitting part 100 and the plane of the light emitting part 200, the manufacturing process of the lighting device 1 is simplified and the manufacturing time can be reduced. there is

The configuration of the side part 500 is not limited to the above, and may be modified and provided in various forms according to the purpose of the lighting device 1 .

According to the configuration described above, the lighting device 1 can indirectly radiate light to the outside, thereby preventing glare of the user. The lighting device 1 can radiate light adjacent to white light to the outside, so that color rendering of the lighting device 1 can be improved. In addition, even if some of the light output from the light source 120 is not emitted to the opening area 330, some of the light output from the light source 120 faces the light emitting unit 100. Since light can be reflected by the reflective film 300 and emitted to the opening area 330 , light efficiency of the lighting device 1 can be increased.

The configuration of the lighting device 1 is not limited to the above-described components, and may include fewer or more components depending on the purpose, location, and the like of the lighting device 1 .

5 is a cross-sectional view of a lighting device according to a second embodiment. 6 is a diagram illustrating a light path of a lighting device according to a second embodiment.

Based on the drawings shown in FIGS. 5 and 6, directions of up, down, left, and right may be taken as references, and these direction references are not dependent on the drawings.

The lighting device 1 according to the second embodiment has a different shape of the first wavelength conversion layer 410 compared to the lighting device 1 according to the first embodiment, and the rest of the configuration is the same. Therefore, in describing the lighting device 1 according to the second embodiment, the same reference numerals are assigned to components common to those of the first embodiment, and detailed descriptions thereof are omitted.

The lighting device 1 according to the second embodiment includes the light emitting part 100, the light emitting part 200, the reflective film 300, the first wavelength conversion layer 410, and the second wavelength conversion layer. 420 and the side part 500 may be included.

Referring to FIG. 5 , the first wavelength conversion layer 410 may include the second wavelength conversion layer 420 .

The top surface 411 of the first wavelength conversion layer of the second embodiment may be positioned on the same plane as the first surface 310 of the reflective film.

The second wavelength conversion layer 420 may be formed at a position corresponding to the reflective film 300 . The second wavelength conversion layer 420 may be formed while contacting the reflective film 300 .

The second wavelength conversion layer 420 may include an upper surface 421 and a lower surface 422 . The upper surface 421 of the second wavelength conversion layer may be a surface positioned facing the light emitting part 200, and the lower surface 422 of the second wavelength conversion layer may be positioned facing the light emitting part 100. It can be cotton. An upper surface 421 and a lower surface 422 of the second wavelength conversion layer 420 may be parallel to each other.

The second wavelength conversion layer 420 may be formed while contacting the first surface 310 of the reflective film. The upper surface 421 of the second wavelength conversion layer may be formed while contacting the first surface 310 of the reflective film. The lower surface 422 of the second wavelength conversion layer may be formed on the same plane as the lower surface 412 of the first wavelength conversion layer.

The first wavelength conversion layer 410 and the second wavelength conversion layer 420 may be formed while contacting each other. The first wavelength conversion layer 410 and the second wavelength conversion layer 420 may be integrally formed. The first wavelength conversion layer 410 and the second wavelength conversion layer 420 may be a single member.

That is, in the first wavelength conversion layer 410 and the second wavelength conversion layer 420 of the second embodiment, the entire area corresponding to the opening area 330 and the first surface 310 of the reflective film It may be formed to correspond to the region. Since the first wavelength conversion layer 410 and the second wavelength conversion layer 420 are integrally formed, a manufacturing process becomes easy and manufacturing costs can be reduced.

Referring to FIG. 6 , light output from the light source 120 may pass through the first wavelength conversion layer 410 and be emitted to the opening area 330 .

The light source 120 may output light. The light output from the light source 120 may include a first light L1 and a second light L2.

The first light L1 may be at least a portion of light output from the light source 120 . The first light L1 may be light emitted from the light source 120 and emitted to the light emitting unit 200 through the opening area 330 while passing through the first wavelength conversion layer 410 . The first light L1 is output from the light source 120 and passes through the opening area 330 while passing through the first wavelength conversion layer 410 located in an area corresponding to the opening area 330. It may be light emitted to the light emitting unit 200 .

The wavelength of the first light L1 may be changed while passing through the first wavelength conversion layer 410 . The first light L1 whose wavelength is changed while passing through the first wavelength conversion layer 410 may be emitted to the light emitting unit 200 through the opening area 330 . That is, the wavelength of the first light L1 may be changed once.

The second light L2 may be at least a part of light output from the light source 120 . The second light L2 may be remaining light that is not emitted as the first light L1 among the light output from the light source 120 . The second light L2 is output from the light source 120, is reflected from the second wavelength conversion layer 420 and the substrate 110, and then passes through the first wavelength conversion layer 410. Light passing through the opening area 330 and exiting to the light exiting unit 200 may be present. The second light L1 is output from the light source 120 and is reflected to the substrate 110 while passing through the second wavelength conversion layer 420 contacting the first surface 310 of the reflective film, After being reflected by the substrate 110 , the light may pass through the first wavelength conversion layer 410 and pass through the opening 330 to be emitted to the light emitting part 200 .

When the second light L2 is reflected while passing through the second wavelength conversion layer 420, the wavelength may be changed. The reflected second light L2 may be emitted with a changed wavelength while passing through the first wavelength conversion layer 410 . That is, the wavelength of the second light L2 may be changed two or more times.

Since the number of times the first light L1 and the second light L2 pass through the first wavelength conversion layer 410 and the second wavelength conversion layer 420 are different, the first light L1 The intensity of each wavelength band may be different from the intensity of the second light L2 according to each wavelength band. Since the wavelength of the second light L2 is changed more frequently than that of the first light L1, color reproducibility or color rendering may be improved. The light output from the lighting device 1 through the light exit unit 200 corresponds to the first light L1 and the second light L2, and the lighting device 1 has a high color rendering index. Light with improved color rendering properties can be emitted, and light efficiency can be improved.

7 is a cross-sectional view of a lighting device according to a third embodiment.

Based on the drawing shown in FIG. 7, directions of up, down, left, and right may be taken as references, and such direction references are not dependent on this drawing.

Compared to the lighting device 1 according to the second embodiment, the lighting device 1 according to the third embodiment has the first wavelength conversion layer 410 and the second wavelength conversion layer 420. The shape is different, but the rest of the configuration is the same. Therefore, in describing the lighting device 1 according to the third embodiment, the same reference numerals are assigned to components common to those of the second embodiment, and detailed descriptions thereof are omitted.

The lighting device 1 according to the third embodiment includes the light emitting part 100, the light emitting part 200, the reflective film 300, the first wavelength conversion layer 410, and the second wavelength conversion layer. 420 and the side part 500 may be included.

Referring to FIG. 7 , the first wavelength conversion layer 410 of the third embodiment may be located in an area corresponding to the opening area 330 . The first wavelength conversion layer 410 may be positioned while filling the opening area 330 .

The lower surface 412 of the first wavelength conversion layer may be positioned on the same plane as the first surface 310 of the reflective film.

The second wavelength conversion layer 420 may be located in an area corresponding to the reflective film 300 . The second wavelength conversion layer 420 may be formed while contacting the second surface 320 of the reflective film. The lower surface 422 of the second wavelength conversion layer may be formed while contacting the second surface 320 of the reflective film.

The top surface 421 of the second wavelength conversion layer may be formed on the same plane as the top surface 411 of the first wavelength conversion layer.

In the third embodiment, the first wavelength conversion layer 410 fills the opening area 330 when the second wavelength conversion layer 420 is formed. can be formed over time. Therefore, the first wavelength conversion layer 410 can be formed simultaneously when the second wavelength conversion layer 420 is formed without a process of separately filling the opening region 330 with the first wavelength conversion layer 410. , the process of forming the first wavelength conversion layer 410 can be simplified. Since the time consumed in the process is reduced, efficiency in the process may be increased.

8 is a cross-sectional view of a lighting device according to a fourth embodiment.

Based on the drawing shown in FIG. 8, directions of up, down, left, and right may be taken as references, and such direction references are not dependent on this drawing.

Compared to the lighting device 1 according to the second embodiment, the lighting device 1 according to the fourth embodiment has the first wavelength conversion layer 410 and the second wavelength conversion layer 420. The shape is different, but the rest of the configuration is the same. Therefore, in describing the lighting device 1 according to the fourth embodiment, the same reference numerals are assigned to components common to those of the second embodiment, and detailed descriptions thereof are omitted.

The lighting device 1 according to the fourth embodiment includes the light emitting part 100, the light emitting part 200, the reflective film 300, the first wavelength conversion layer 410, and the second wavelength conversion layer. 420 and the side part 500 may be included.

Referring to FIG. 8 , the first wavelength conversion layer 410 of the fourth embodiment may be located in an area corresponding to the opening area 330 . The first wavelength conversion layer 410 of the fourth embodiment may be positioned while filling the opening area 330 .

The upper surface 411 of the first wavelength conversion layer may be positioned on the same plane as the second surface 320 of the reflective film.

The second wavelength conversion layer 420 of the fourth embodiment may be positioned in an area corresponding to the reflective film 300 . The second wavelength conversion layer 420 may be formed while contacting the first surface 310 of the reflective film. The upper surface 421 of the second wavelength conversion layer may be formed while contacting the first surface 310 of the reflective film.

The lower surface 422 of the second wavelength conversion layer may be formed on the same plane as the lower surface 412 of the first wavelength conversion layer.

In the fourth embodiment, since the second wavelength conversion layer 420 is formed while contacting the first surface 310 of the reflective film, among the light output from the light source 120, the first light L1 ) may be emitted as the second light L2 through the light emitting unit 200 after being reflected through the second wavelength conversion layer 420 . Therefore, since the second light L2 is the light that is not emitted as the first light L1 and is emitted to the light emitting unit 200, the efficiency of the lighting device 1 can be promoted by reducing light loss. there is. In addition, the second light L2 is emitted through the first wavelength conversion layer 410 and the second wavelength conversion layer 420, and the wavelength of the second light L2 is changed two or more times. Therefore, color rendering of the lighting device 1 can be improved and light efficiency can be increased.

9 is a cross-sectional view of a lighting device according to a fifth embodiment.

Based on the drawing shown in FIG. 9, directions of up, down, left, and right may be taken as references, and such direction references are not dependent on this drawing.

The lighting device 1 according to the fifth embodiment has the first wavelength conversion layer 410 and the second wavelength conversion layer 420 compared to the lighting device 1 according to the second embodiment. The shape is different, but the rest of the configuration is the same. Therefore, in describing the lighting device 1 according to the fifth embodiment, the same reference numerals are assigned to components common to those of the second embodiment, and detailed descriptions thereof are omitted.

The lighting device 1 according to the fifth embodiment includes the light emitting part 100, the light emitting part 200, the reflective film 300, the first wavelength conversion layer 410, and the second wavelength conversion layer. 420 and the side part 500 may be included.

Referring to FIG. 9 , the first wavelength conversion layer 410 of the fifth embodiment may be positioned in an area corresponding to the opening area 330 . The first wavelength conversion layer 410 may be positioned while filling the opening area 330 .

The lower surface 411 of the first wavelength conversion layer may be positioned on the same plane as the first surface 310 of the reflective film.

The second wavelength conversion layer 420 may be located in an area corresponding to a part of the reflective film 300 . The second wavelength conversion layer 420 may be formed while contacting at least a portion of the second surface 320 of the reflective film.

The top surface 421 of the second wavelength conversion layer may be formed on the same plane as the top surface 411 of the first wavelength conversion layer.

The lower surface 422 of the second wavelength conversion layer may be formed while contacting the second surface 320 of the reflective film.

When the second wavelength conversion layer 420 is viewed from the direction in which the light emitting unit 200 is located, the second wavelength conversion layer 420 is formed to surround the first wavelength conversion layer 410. can When the second wavelength conversion layer 420 is viewed from the direction in which the light emitting unit 200 is located, the second wavelength conversion layer 420 has various shapes based on the shape of the first wavelength conversion layer 410. can be provided as

In the fifth embodiment, the second wavelength conversion layer 420 is formed on a partial region of the reflective film 300 adjacent to the opening region 330 when the first wavelength conversion layer 410 is formed. A second wavelength conversion layer 420 may be formed together with the first wavelength conversion layer 410 . That is, the second wavelength conversion layer 420 is not separately formed in a partial region of the reflective film 300 after the first wavelength conversion layer 420 is formed, but the first wavelength conversion layer 420 is formed. may be formed at the same time. Therefore, the process of forming the second wavelength conversion layer 420 can be simplified, and since the time consumed in the process is reduced, efficiency in the process can be increased. In addition, since the second wavelength conversion layer 420 is located only on a portion of the reflective film 300 and not on the entire surface, a relatively small amount of material is required, thereby reducing costs.

10 is a cross-sectional view of a lighting device according to a sixth embodiment.

Based on the drawing shown in FIG. 10, directions of up, down, left, and right may be taken as references, and these direction references are not dependent on this drawing.

Compared to the lighting device 1 according to the fifth embodiment, the lighting device 1 according to the sixth embodiment has the first wavelength conversion layer 410 and the second wavelength conversion layer 420. The shape is different, but the rest of the configuration is the same. Therefore, in describing the lighting device 1 according to the sixth embodiment, the same reference numerals are assigned to components common to those of the fifth embodiment, and detailed descriptions thereof are omitted.

The lighting device 1 according to the sixth embodiment includes the light emitting part 100, the light emitting part 200, the reflective film 300, the first wavelength conversion layer 410, and the second wavelength conversion layer. 420 and the side part 500 may be included.

Referring to FIG. 10 , the first wavelength conversion layer 410 of the sixth embodiment may be positioned in an area corresponding to the opening area 330 . The first wavelength conversion layer 410 may be positioned while filling the opening area 330 .

The upper surface 411 of the first wavelength conversion layer may be positioned on the same plane as the second surface 320 of the reflective film.

The second wavelength conversion layer 420 may be located in an area corresponding to a part of the reflective film 300 . The second wavelength conversion layer 420 may be formed while contacting at least a portion of the first surface 310 of the reflective film.

The upper surface 421 of the second wavelength conversion layer may be formed while contacting the first surface 310 of the reflective film.

The lower surface 422 of the second wavelength conversion layer may be formed on the same plane as the lower surface 412 of the first wavelength conversion layer.

When looking at the second wavelength conversion layer 420 from the direction in which the light emitting unit 100 is located, the second wavelength conversion layer 420 will be formed in a form surrounding the first wavelength conversion layer 410. can When the second wavelength conversion layer 420 is viewed from the direction in which the light emitting unit 100 is located, the second wavelength conversion layer 420 has various shapes based on the shape of the first wavelength conversion layer 410. can be provided as

In the sixth embodiment, since the second wavelength conversion layer 420 is formed in contact with at least a portion of the first surface 310 of the reflective film, the first light among the light output from the light source 120 After some of the remaining light that has not been emitted to L1 is reflected through the second wavelength conversion layer 420 , it may be emitted as the second light L2 through the light emitting unit 200 . Therefore, since a part of the light that is not emitted as the first light L1 of the second light L2 is emitted to the light emitting unit 200, light loss can be reduced and the efficiency of the lighting device 1 can be promoted. there is. In addition, the second light L2 is emitted through the first wavelength conversion layer 410 and the second wavelength conversion layer 420, and the wavelength of the second light L2 is changed two or more times. Therefore, color rendering of the lighting device 1 can be improved and light efficiency can be increased.

11 is a view showing a conventional lighting device. 12 and 13 are diagrams illustrating a lighting device according to an embodiment of the present invention.

Specifically, FIGS. 12 and 13 have the same size as the conventional lighting device of FIG. 11 , but are an embodiment of the present invention including the reflective film 300 and the first wavelength conversion layer 410 . 12 shows the lighting device 1 including the reflective film 300 and the first wavelength conversion layer 410, and FIG. 13 shows the light emitting unit 200 in the lighting device 1 of FIG. It shows the lighting device 1 including up to. 11 to 13 show a conventional lighting device manufactured in a size of 300X1200 and a lighting device according to an embodiment of the present invention.

Table 1 shows the characteristics of the lighting device according to the prior art and an embodiment of the present invention.

Model lm lm/W Power CIE [X] CIE [Y] CCT CRI One prior art 4905.4 99.4 49.3 0.3228 0.338 5946K 81.3 2 An embodiment of the present invention 4929.5 99.9 49.3 0.3735 0.3593 4068K 87.6

The conventional lighting device of FIG. 11 has a rectangular shape, does not include the reflective film 300, and does not include the first wavelength conversion layer 410 and the second wavelength conversion layer 420. . The lighting device according to an embodiment of the present invention of FIGS. 12 and 13 has the same appearance as the conventional lighting device of FIG. 11, but includes the reflective film 300, and the first wavelength conversion layer 410 and the A lighting device including at least one of the second wavelength conversion layer 420 .

Referring to Table 1, in the lighting device according to an embodiment of the present invention, a portion of the light emitted from the light source 120 and not emitted to the opening area 330 is reflected by the reflective film 300. Since the light exits through the opening area 330 after being formed, it can be confirmed that the lighting device according to an embodiment of the present invention has more improved light efficiency than the conventional lighting device. Specifically, the conventional lighting device has a total luminous flux of 4905.4lm and a light efficiency of 99.4lm/W, whereas the lighting device according to an embodiment of the present invention has a total luminous flux of 4929.5lm and an improved efficiency of 99.9lm/W. It can be confirmed that it has light efficiency.

In addition, in the lighting device according to an embodiment of the present invention, the first wavelength conversion layer 410 and the second wavelength conversion layer 420 formed in the lighting device, the light output from the light source 120 Light is emitted while passing through, and in this process, the wavelength of light output from the light source 120 may be changed and emitted. Therefore, the lighting device according to an embodiment of the present invention has increased color coordinates (CIE [X], CIE [Y]) and decreased correlated color temperature (CCT) compared to the conventional lighting device, so that the light emitted from the lighting device This may correspond to the main white color. Due to this, the color rendering index (CIE) may also be improved. That is, the lighting device according to an embodiment of the present invention can emit light more similar to natural light because color coordinates and correlated color temperature are changed and the color rendering index is improved compared to the conventional lighting device, and the user's eyes are not tired. can alleviate

Specifically, the color coordinate values of the conventional lighting device correspond to CIE [X] 0.3228 and CIE [Y] 0.338, whereas the color coordinate values of the lighting device according to an embodiment of the present invention correspond to CIE [X] 0.3735 and CIE [Y]. Since [Y] corresponds to 0.3593, it can be confirmed that each color coordinate value increased. In addition, since the correlated color temperature (4068K) of the lighting device according to an embodiment of the present invention is reduced compared to the correlated color temperature (5946K) of the conventional lighting device, light emitted from the lighting device according to an embodiment of the present invention is It can be confirmed that it corresponds to the main white color. Due to changes in color coordinate values and correlated color temperature, it can be confirmed that the color rendering index is improved in the case of the lighting device 87.6 according to an embodiment of the present invention compared to the conventional lighting device 81.3.

14 is a diagram showing a conventional lighting device. 15 is a diagram illustrating a lighting device according to an embodiment of the present invention.

Specifically, FIG. 15 has the same size as the conventional lighting device of FIG. 14 , but is an embodiment of the present invention including the reflective film 300 and the first wavelength conversion layer 410 . 14 to 15 show a conventional lighting device having a direct downlight shape and a lighting device according to an embodiment of the present invention.

Table 2 shows the characteristics of the lighting device according to the prior art and an embodiment of the present invention.

# Model lm lm/W Power CIE [X] CIE [Y] CCT CRI One prior art 1802.1 122.3 14.7 0.3329 0.3443 5483.2K 82.6 2 An embodiment of the present invention 1854.5 125.6 14.77 0.3495 0.3465 4810K 85.9

The conventional lighting device of FIG. 14 has a direct downlight shape, does not include the reflective film 300, and does not include the first wavelength conversion layer 410 and the second wavelength conversion layer 420. It is a device. The lighting device according to an embodiment of the present invention of FIG. 15 has the same shape as the conventional lighting device of FIG. 14, but includes the reflective film 300, and includes the first wavelength conversion layer 410 and the second wavelength. A lighting device including at least one of the conversion layer 420 .

Referring to Table 2, in the lighting device according to an embodiment of the present invention, a portion of the light that is not emitted to the opening area 330 after being output from the light source 120 is reflected by the reflective film 300. Since the light exits through the opening area 330 after being formed, it can be confirmed that the lighting device according to an embodiment of the present invention has more improved light efficiency than the conventional lighting device. Specifically, the conventional lighting device has a total luminous flux of 1802.1 lm and has a light efficiency of 122.3 lm/W, whereas the lighting device according to an embodiment of the present invention has a total luminous flux of 1854.5 lm and an improved 125.6 lm/W. It can be confirmed that it has light efficiency.

In addition, in the lighting device according to an embodiment of the present invention, the first wavelength conversion layer 410 and the second wavelength conversion layer 420 formed in the lighting device, the light output from the light source 120 Light is emitted while passing through, and in this process, the wavelength of light output from the light source 120 may be changed and emitted. Therefore, the lighting device according to an embodiment of the present invention has increased color coordinates (CIE [X], CIE [Y]) and decreased correlated color temperature (CCT) compared to the conventional lighting device, so that the light emitted from the lighting device This may correspond to the main white color. Due to this, the color rendering index (CIE) may also be improved. That is, the lighting device according to an embodiment of the present invention can emit light more similar to natural light because the color coordinates and correlated color temperature are changed and the color rendering index is improved compared to the conventional lighting device, and the user's eyes are tired. can alleviate

Specifically, the color coordinate values of the conventional lighting device correspond to CIE [X] 0.3329 and CIE [Y] 0.3443, whereas the color coordinate values of the lighting device according to an embodiment of the present invention correspond to CIE [X] 0.3495 and CIE [Y]. Since [Y] corresponds to 0.3465, it can be confirmed that each color coordinate value has increased. In addition, since the correlated color temperature (4810K) of the lighting device according to an embodiment of the present invention is reduced compared to the correlated color temperature (5483.2K) of the conventional lighting device, light emitted from the lighting device according to an embodiment of the present invention It can be confirmed that corresponds to the main white color. Due to changes in color coordinate values and correlated color temperature, it can be confirmed that the color rendering index is improved in the case of the lighting device 85.9 according to an embodiment of the present invention compared to the conventional lighting device 82.6.

16 is a view showing a conventional lighting device. 17 is a diagram illustrating a lighting device according to an embodiment of the present invention.

Specifically, FIG. 17 has the same size as the conventional lighting device of FIG. 16 , but is an embodiment of the present invention including the reflective film 300 and the first wavelength conversion layer 410 . 16 and 17 show a conventional lighting device manufactured in a rectangular shape having a width of 30 mm and a lighting device according to an embodiment of the present invention.

Table 3 shows the characteristics of the lighting device according to the prior art and an embodiment of the present invention.

# Model lm lm/W Power CIE [X] CIE [Y] CCT CRI One prior art 2205.7 109.5 20.1 0.3157 0.3391 6283.8 83.9 2 One embodiment of the present invention 2023.8 98.5 20.5 0.365 0.3612 4350.5 90.5

The conventional lighting device of FIG. 16 has a rectangular shape with a width of 30 mm, does not include the reflective film 300, and includes the first wavelength conversion layer 410 and the second wavelength conversion layer 420. It is a lighting device that does not. The lighting device according to an embodiment of the present invention of FIG. 17 has the same shape as the conventional lighting device of FIG. 16, but includes the reflective film 300, and includes the first wavelength conversion layer 410 and the second wavelength. A lighting device including at least one of the conversion layer 420 .

Referring to Table 3, unlike Tables 1 and 2 above, it can be confirmed that the total luminous flux and light efficiency of the conventional lighting device are higher than those of the exemplary embodiment of the present invention. Specifically, it can be confirmed that the total luminous flux of an embodiment of the present invention is 2023.8lm and the light efficiency is 98.5lm/W, whereas the total luminous flux of the conventional lighting device is 2205.7lm and the light efficiency is 109.5lm/W. . Compared to the lighting device of FIGS. 11 to 13 and the lighting device of FIGS. 14 to 15, this is the opening area 330 spaced apart from the one opening area 330 in the lighting device of FIGS. 16 to 17. ) may be due to the large distance between them. That is, among the light output from the light source 120, a part of the light that is not emitted to the opening area 330 positioned to correspond to the light source 120 is reflected by the reflective film 300 and the light source 120 This may be because light is lost before being emitted to the other opening area 330 located adjacent to .

However, in the lighting device according to an embodiment of the present invention, the first wavelength conversion layer 410 and the second wavelength conversion layer 420 formed in the lighting device, the light output from the light source 120 Light is emitted while passing through, and in this process, the wavelength of light output from the light source 120 may be changed and emitted. Therefore, the lighting device according to an embodiment of the present invention has increased color coordinates (CIE [X], CIE [Y]) and decreased correlated color temperature (CCT) compared to the conventional lighting device, so that light emitted from the lighting device This may correspond to the main white color. Due to this, the color rendering index (CIE) may also be improved. That is, the lighting device according to an embodiment of the present invention can emit light more similar to natural light because the color coordinates and correlated color temperature are changed and the color rendering index is improved compared to the conventional lighting device, and the user's eyes are tired. can alleviate

Specifically, the color coordinate values of the conventional lighting device correspond to CIE [X] 0.3157 and CIE [Y] 0.3391, whereas the color coordinate values of the lighting device according to an embodiment of the present invention correspond to CIE [X] 0.365 and CIE [Y]. Since [Y] corresponds to 0.3612, it can be confirmed that each color coordinate value increased. In addition, the correlated color temperature (4350.5K) of the lighting device according to an embodiment of the present invention is reduced compared to the correlated color temperature (6283.8K) of the conventional lighting device. It can be confirmed that the light corresponds to daylight white. Due to changes in color coordinate values and correlated color temperature, it can be confirmed that the color rendering index is improved in the case of the lighting device 90.5 according to an embodiment of the present invention compared to the conventional lighting device 83.9.

Therefore, in summarizing the results of Tables 1 to 3, among the light output from the light source 120 in the lighting device 1, no light is emitted to the aperture area 330 located in the area corresponding to the light source 120. Light efficiency of the lighting device 1 is increased because some of the light that cannot be reflected is reflected by the reflective film 300 and then emitted to the other opening area 330 located in an area adjacent to the light source 120. You can check. In addition, since the light output from the light source 120 passes through the first wavelength conversion layer 410 and the second wavelength conversion layer 420 and is emitted in a state in which the wavelength of light is changed, It can be confirmed that the color rendering is improved.

1: lighting device
100: light emitting part
110: substrate
120: light source
200: miner
300: reflective film
310: first surface of the reflective film
320: the second side of the reflective film
330: opening area
410: first wavelength conversion layer
411: top surface of the first wavelength conversion layer
412: the lower surface of the first wavelength conversion layer
420: second wavelength conversion layer
421: top surface of the second wavelength conversion layer
422: the lower surface of the second wavelength conversion layer
500: side part

Claims (17)

A light emitting unit including a substrate and at least one light source;
At least one first wavelength conversion layer for changing the wavelength of light output from the light source;
A reflective film that reflects the irradiated light; and
A second wavelength conversion layer formed between the light source and the reflective film;
The reflective film includes at least one opening area located in an area corresponding to the light source,
The first wavelength conversion layer is formed to fill the opening area at a position corresponding to the opening area,
The width of the opening area is greater than the width of the light source,
The wavelength of the light output from the light source is changed by the first wavelength conversion layer and output to the light exit unit;
The first wavelength conversion layer and the second wavelength conversion layer are integrally formed,
At least a portion of the light output from the light source is first light emitted to the light exiting unit through the opening area through the first wavelength conversion layer;
The remainder of the light output from the light source is reflected from the second wavelength conversion layer positioned on the first surface of the reflective film and the substrate, passes through the first wavelength conversion layer, and is emitted to the light exit unit through the opening area. a second light;
The intensity by wavelength of the first light and the intensity by wavelength of the second light are different,
lighting device.
According to claim 1,
The reflective film includes a first surface and a second surface,
The first surface of the reflective film is a surface positioned facing the light emitting unit,
The second surface of the reflective film is a surface positioned facing the light exit part,
The first wavelength conversion layer includes an upper surface and a lower surface,
The upper surface of the first wavelength conversion layer is a surface positioned facing the light exit portion,
The lower surface of the first wavelength conversion layer is a surface positioned facing the light emitting part,
The opening area is formed to penetrate between the first and second surfaces of the reflective film,
lighting device.
delete According to claim 2,
The upper surface of the first wavelength conversion layer is located on the same plane as the second surface of the reflective film,
The lower surface of the first wavelength conversion layer is located on the same plane as the first surface of the reflective film,
lighting device.
delete delete delete delete delete delete delete According to claim 1,
The first wavelength conversion layer and the second wavelength conversion layer are formed in contact with each other,
The second wavelength conversion layer is located in a partial region of the reflective film,
The second wavelength conversion layer is located spaced apart from the second wavelength conversion layer formed in the adjacent opening area,
lighting device.
According to claim 12,
The upper surface of the first wavelength conversion layer is located on the same plane as the second surface of the reflective film,
The upper surface of the second wavelength conversion layer is formed while contacting the first surface of the reflective film,
The lower surface of the first wavelength conversion layer is located on the same plane as the lower surface of the second wavelength conversion layer,
lighting device.
According to claim 12,
The lower surface of the first wavelength conversion layer is located on the same plane as the first surface of the reflective film,
The lower surface of the second wavelength conversion layer is formed while contacting the second surface of the reflective film,
The upper surface of the first wavelength conversion layer is located on the same plane as the upper surface of the second wavelength conversion layer,
lighting device.
According to claim 1,
The distance between the light source and the first wavelength conversion layer is shorter than the height of the light source,
The distance between the light source and the first wavelength conversion layer is shorter than the thickness of the reflective film,
lighting device.
According to claim 1,
The first wavelength conversion layer includes at least one or more of quantum dots, phosphors, and nano phosphors.
lighting device.
delete

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