WO2016072311A1 - 波長変換部材、及びそれを用いた発光装置、発光素子、光源装置、並びに表示装置 - Google Patents
波長変換部材、及びそれを用いた発光装置、発光素子、光源装置、並びに表示装置 Download PDFInfo
- Publication number
- WO2016072311A1 WO2016072311A1 PCT/JP2015/080172 JP2015080172W WO2016072311A1 WO 2016072311 A1 WO2016072311 A1 WO 2016072311A1 JP 2015080172 W JP2015080172 W JP 2015080172W WO 2016072311 A1 WO2016072311 A1 WO 2016072311A1
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- WIPO (PCT)
- Prior art keywords
- light
- wavelength conversion
- light emitting
- conversion member
- incident surface
- Prior art date
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Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/505—Wavelength conversion elements characterised by the shape, e.g. plate or foil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
Definitions
- the present invention relates to a wavelength conversion member having a wavelength conversion layer in a container, and a light emitting device, a light emitting element, a light source device, and a display device using the same.
- Patent Document 1 discloses an invention related to a light emitting device including a light source, a wavelength conversion member, a light guide plate, and the like.
- the wavelength conversion member is provided between the light source and the light guide plate, and absorbs light having a wavelength emitted from the light source, and then generates light having a different wavelength.
- the wavelength conversion part substance is enclosed with cylindrical containers, such as glass, for example.
- the wavelength converting substance includes a fluorescent pigment, a fluorescent dye, a quantum dot, or the like.
- Patent Document 1 also describes that quantum dots are preferable as the wavelength conversion substance (see paragraph [0018]).
- the wavelength converting substance absorbs light from the light source and converts it into light of another wavelength, and emits the converted light.
- the wavelength converting substance is disposed at the exact center between the light incident surface and the light emitting surface of the container. And as shown to FIG. 2 etc. of patent document 1, the wavelength conversion member is arrange
- Patent Document 1 there is no description or suggestion of means for suppressing the occurrence of blackening in the wavelength conversion layer.
- the present invention has been made in view of the above points, and in particular, provides a wavelength conversion member that can suppress the occurrence of black discoloration as compared with the prior art, and a light emitting device, a light emitting element, a light source device, and a display device using the same.
- the purpose is to do.
- the inventors of the present invention can suppress the occurrence of blackening by optimizing the position of the wavelength conversion layer containing quantum dots in the container.
- the headline and the present invention were completed. That is, the present invention is as follows.
- the wavelength conversion member according to the present invention includes a light incident surface, a light emitting surface facing the light incident surface, a container provided with a housing space inside the light incident surface and the light emitting surface, and the housing space.
- a distance L1 between the light incident surface and the wavelength conversion layer is a distance L2 between the light emission surface and the wavelength conversion layer. It is characterized by being larger than
- the wavelength conversion member when the wavelength conversion member is incorporated in a light emitting device or the like, the distance between the wavelength conversion layer and the light source can be appropriately maintained, so that occurrence of blackening can be suppressed as compared with the conventional case.
- the wavelength conversion layer is preferably formed of a resin composition in which the quantum dots are dispersed.
- a colored layer is formed on a side surface connecting the light incident surface and the light emitting surface, on an end portion of the light emitting surface, or on the side surface to an end portion of the light emitting surface. It is preferable that Thus, by providing the colored layer, it is possible to provide a wavelength conversion member that can effectively convert the color of light incident on the light incident surface and emit the light from the light exit surface as compared with the conventional case.
- the said storage space may be provided inside the side surface which connects between the said light-incidence surface and the said light-projection surface, and the colored layer may be formed in the wall surface in the said storage space.
- the said storage space is provided inside the side surface which connects between the said light-incidence surface and the said light-projection surface, and the colored layer is provided between the said side surface of the said container and the said storage space. May be.
- the colored layer is preferably colored white.
- the colored layer is preferably composed of paint, ink, or tape.
- an identification unit for identifying the light incident surface side and the light emitting surface side is provided.
- a light-emitting device is characterized by including a light-emitting element and the wavelength conversion member according to any one of the above-described components disposed on the light-emitting side of the light-emitting element.
- it can be set as the structure by which the said light emitting element and the said wavelength conversion member are arrange
- the light emitting device is characterized by including a light emitting chip and the wavelength conversion member according to any one of the above-described wavelength conversion members disposed on the light emitting side of the light emitting chip.
- it can be set as the structure by which the resin layer which covers the said light emitting chip, and the said wavelength conversion member are arrange
- the light source device includes the light emitting device described above or the light emitting element described above and a light guide plate.
- the display device includes a display portion and the light-emitting device described above or the light-emitting element described above disposed on the back side of the display portion.
- the above-described light emitting device, light emitting element, light source device, and display device of the present invention each include the wavelength conversion member of the present invention. Therefore, the occurrence of blackening can be appropriately suppressed as compared with the conventional case, and the light emission efficiency can be improved.
- the wavelength conversion member of the present invention By incorporating the wavelength conversion member of the present invention into a light emitting device or the like, the occurrence of blackening can be suppressed as compared with the conventional case. Therefore, the light emission efficiency of the light emitting device, the light emitting element, the light source device, and the display device including the wavelength conversion member of the present invention can be improved as compared with the conventional case.
- FIG. 2 is a cross-sectional view of the wavelength conversion member shown in FIG. 1 cut along a line AA in the vertical direction and viewed from the arrow direction. It is sectional drawing of the wavelength conversion member which shows a different cross-sectional shape from FIG. It is sectional drawing of the wavelength conversion member which shows the cross-sectional shape different from FIG. 2, FIG. FIG. 2 is a cross-sectional view of the wavelength conversion member shown in FIG. 1 cut in a vertical direction along the line CC and viewed from the direction of the arrows. It is sectional drawing of the wavelength conversion member which shows the cross-sectional shape different from FIG.2, FIG.3, FIG.4.
- FIG. 11 is an enlarged longitudinal sectional view taken in the height direction along the line BB and viewed from the arrow direction in a state where the wavelength conversion members shown in FIG. 10 are combined.
- FIG. 11 is a longitudinal sectional view of the light-emitting element as seen from the direction of the arrow, cut in the height direction along the line BB shown in FIG.
- FIG. 11 is a longitudinal cross-sectional view of the light emitting element which shows an example which provided the identification part in the wavelength conversion member which shows 2nd Embodiment.
- FIG. 1 is a perspective view of a wavelength conversion member showing a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the wavelength conversion member shown in FIG. 1 cut in the vertical direction along the line AA and viewed from the arrow direction.
- the wavelength conversion member 1 in the first embodiment includes a container 2 and a wavelength conversion layer 3.
- the container 2 can accommodate and hold the wavelength conversion layer 3.
- the container 2 is preferably a transparent member. “Transparent” refers to what is generally recognized as being transparent, or having a visible light transmittance of about 50% or more.
- the container 2 includes a light incident surface 2a, a light emitting surface 2b, and a side surface 2c that connects the light incident surface 2a and the light emitting surface 2b. As shown in FIGS. 1 and 2, the light incident surface 2a and the light emitting surface 2b are in a positional relationship facing each other.
- the container 2 has a storage space 5 formed inside the light incident surface 2a, the light emitting surface 2b, and the side surface 2c.
- the storage space 5 should just be located inside at least the light incident surface 2a and the light emitting surface 2b. That is, for example, a part of the storage space 5 may reach the side surface 2c.
- the wavelength conversion layer 3 is disposed in the storage space 5. As shown in FIG. 1, the storage space 5 is open, and for example, the wavelength conversion substance constituting the wavelength conversion layer 3 can be sealed and filled in the storage space 5 from here. Alternatively, the molded body of the wavelength conversion layer 3 can be inserted into the storage space 5.
- the vertical and horizontal dimensions of the container 2 are about several mm to several tens of mm, and the vertical and horizontal dimensions of the storage space 5 are about several hundred ⁇ m to several mm.
- the outer cross section of the storage space 5 and the outer cross section of the container 2 are both rectangular. It is formed with.
- the “rectangular shape” has four vertices having a substantially right angle and includes a square and a rectangle.
- the outer cross section of the storage space 5 and the outer cross section of the container 2 are preferably similar.
- the container 2 shown in FIGS. 1 and 2 is, for example, a glass tube container, and can be exemplified by a glass capillary.
- a resin or the like may be used as long as a transparent, gas barrier, and water-resistant container can be configured.
- the wavelength conversion layer 3 shown in FIGS. 1 and 2 preferably includes a substance that absorbs blue light and emits red light, and a wavelength conversion substance that absorbs blue light and emits green light.
- at least quantum dots are included.
- the configuration and material of the quantum dots are not limited, for example, the quantum dots in the present embodiment can have a core of semiconductor particles and a shell portion that covers the periphery of the core.
- CdSe is used for the core, but the material is not particularly limited.
- a core material containing at least Zn and Cd a core material containing Zn, Cd, Se and S, ZnCuInS, CdS, CdSe, ZnS, ZnSe, InP, CdTe, and some composites thereof are used. it can.
- the quantum dot in this Embodiment may be comprised only by the core part of a semiconductor particle, without forming a shell part. That is, the quantum dot does not need to have a covering structure with a shell part as long as it has at least a core part. For example, when the shell portion is coated on the core portion, the region that becomes the covering structure may be small or the covering portion may be too thin to analyze and confirm the covering structure. Therefore, it can be determined as a quantum dot regardless of the presence or absence of the shell portion by analysis.
- Quantum dots include, for example, two types of quantum dots having an absorption wavelength of 460 nm (blue) and a fluorescence wavelength of about 520 nm (green) and a quantum dot of about 660 nm (red). For this reason, when blue light is incident from the light incident surface 2a, a part of blue is converted into green or red by each quantum dot. Thereby, white light can be obtained from the light emitting surface 2b.
- the quantum dot and a fluorescent substance different from the quantum dot may be included.
- red light emitting quantum dots and green light emitting fluorescent materials or green light emitting quantum dots and red light emitting fluorescent materials.
- the fluorescent material include YAG (yttrium, aluminum, garnet), TAG (terbium, aluminum, garnet), sialon, and BOS (barium orthosilicate), but the material is not particularly limited.
- the quantum dots included in the wavelength conversion layer 3 may be included in the entire wavelength conversion layer 3 or the content ratio is modulated between the light incident surface 2a side and the light emitting surface 2b side. May be. In the case of modulation, it is preferable that the number of quantum dots included on the light incident surface 2a side is smaller than the number of quantum dots included on the light output surface 2b side. Moreover, it is good also as a structure where the resin layer which does not contain a quantum dot exists in the light-incidence surface 2a side, and the resin layer which contains a quantum dot exists only in the light-projection surface 2b side.
- the wavelength conversion layer 3 is preferably formed of a resin composition in which quantum dots are dispersed.
- resins include polypropylene, polyethylene, polystyrene, AS resin, ABS resin, methacrylic resin, polyvinyl chloride, polyacetal, polyamide, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, polyethylene terephthalate, polysulfone, polyethersulfone, and polyphenylene sulfide.
- Polyamideimide, polymethylpentene, liquid crystal polymer, epoxy resin, phenol resin, urea resin, melamine resin, epoxy resin, diallyl phthalate resin, unsaturated polyester resin, polyimide, polyurethane, silicone resin, or some mixture thereof Etc. can be used.
- the refractive index of the resin constituting the wavelength conversion layer 3 is preferably smaller than the refractive index of the container 2.
- the refractive index of the silicone resin is 1.52 for SCR1016 manufactured by Shin-Etsu Chemical Co., Ltd., 1.55 for A2045 manufactured by Daicel Corporation, at 23 ° C., sodium D line, manufactured by Shin-Etsu Chemical Co., Ltd. KER-2500 of 1.41 and A1080 manufactured by Daicel Corporation of 1.41.
- the refractive index of an epoxy resin is 1.51 in Cell Venus WO917 made from Daicel Corporation, and 1.50 in Cell Venus WO925 in sodium D line
- the refractive index of the container 2 made of glass is about 1.45 in the case of general glass, and about 1.50 to 1.90 in the case of optical glass with a high refractive index. Therefore, by appropriately selecting the resin constituting the wavelength conversion layer 3 and the material of the container 2, the refractive index of the resin constituting the wavelength conversion layer 3 can be made smaller than the refractive index of the container 2.
- A1080 or KER-2500 which is a silicone resin having a refractive index of 1.41, is used as the resin constituting the wavelength conversion layer 3, and the container 2 can be made of glass having a refractive index of 1.45.
- a silicone resin or epoxy resin having a refractive index of 1.41 to 1.55 is used as a resin constituting the wavelength conversion layer 3, and the container 2 is made of glass having a high refractive index of 1.56 or more. Can be configured. As a result, part of the light that has entered the wavelength conversion layer 3 is totally reflected by the side wall portion of the container 2 facing the storage space 5. This is because the incident angle on the medium side with a small refractive index is larger than the incident angle on the medium side with a large refractive index. Thereby, since the amount of light leaking from the side of the container 2 to the outside can be reduced, the color conversion efficiency and the light emission intensity can be increased.
- the distance between the light incident surface 2a and the wavelength conversion layer 3 is L1, and the distance L2 between the light emission surface 2b and the wavelength conversion layer 3.
- the distances L and L2 are linear distances. For example, each of the centers of the light incident surface 2a and the light emitting surface 2b is drawn with a straight line, and the distances L1 and L2 can be measured by a length along the straight line.
- the distance L1 is larger than the distance L2. That is, the container 2 is thicker on the light incident surface 2a side than on the light emitting surface 2b side when viewed from the wavelength conversion layer 3.
- the distance L1 is about 1 mm to 8 mm, and the distance L2 is about 0.2 mm to 1 mm.
- the distance L1 is about 5 mm, and the distance L2 is about 0.5 mm.
- the wavelength conversion member 1 shown in FIGS. 1 and 2 can be interposed between a light emitting element (light source) 10 such as an LED and a light guide plate 12, as shown in FIG.
- a combination of the wavelength conversion member 1 and the light emitting element 10 is a light emitting device, and a light source plate 12 is added to the light emitting device to constitute a light source device.
- the light guide member can be configured by combining the wavelength conversion member 1 and the light guide plate 12.
- the light emitting device shown in FIG. 9 can be used as a white surface light source of a liquid crystal display, for example.
- the wavelength conversion member 1 and the light emitting element 10 are arranged in contact with each other. At this time, each light emitting element 10 is in contact with the light incident surface 2 a of the wavelength conversion member 1.
- the wavelength conversion member 1 and the light guide plate 12 may be in contact with each other.
- the wavelength conversion layer 3 formed in the wavelength conversion member 1 is arrange
- the wavelength conversion layer has been disposed at the center between the light incident surface and the light exit surface of the wavelength conversion member. That is, when viewed from the wavelength conversion layer, the distance to the light incident surface and the distance to the light exit surface are the same.
- the wavelength conversion layer 3 is arranged so as to be biased toward the light exit surface 2b rather than the light incident surface 2a. For this reason, when the wavelength conversion member 1 is incorporated in the light emitting device, the wavelength conversion layer 3 can be moved away from the light emitting element 10 appropriately and easily in the present embodiment as compared with the conventional case.
- the wavelength conversion member 1 is disposed in contact with the light emitting element 10, so that the wavelength conversion layer 3 can be easily and appropriately made a light emitting device while keeping the wavelength conversion layer 3 away from the light emitting element 10. Can be incorporated.
- the wavelength conversion member 1 is disposed in contact with the light emitting element 10, it is possible to promote a reduction in thickness of the light emitting device.
- blackening occurs in the portion of the wavelength conversion layer facing the light emitting element 10.
- the blackening is considered to be caused by the influence of light and / or heat from the light emitting element 10 on the quantum dots.
- the distance L1 between the wavelength conversion layer 3 and the light incident surface 2a is set to the wavelength conversion layer 3 and This is larger than the distance L2 between the light exit surface 2b.
- the container 2 is made thinner on the light exit surface 2b side when viewed from the wavelength conversion layer 3. Accordingly, it is possible to suppress the occurrence of blackening while suppressing an increase in the thickness of the entire container 2 (width dimension between the light incident surface 2a and the light emitting surface 2b).
- FIG. 3 is a cross-sectional view of a wavelength conversion member showing a cross-sectional shape different from that of FIG. 2 denote the same parts as those in FIG.
- colored layers 4 and 4 are provided on the side surface 2 c of the container 2.
- the “colored layer” is a layer that is not transparent, and refers to a layer colored in colors including white.
- the colored layer 4 is preferably composed of paint, ink, or tape.
- the color of the colored layer 4 is not limited, it is suitable that it is white. Therefore, the colored layer 4 can be easily formed by simply applying white paint or white ink to the side surface 2c or simply applying a white tape to the side surface 2c.
- the colored layer 4 can be formed by vapor-depositing a metal such as Ni, Ag, Al, or Cr.
- the colored layer 4 is formed on the side surface 2c of the container 2.
- the colored layer 4 is formed from the side surface 2c of the container 2 to the end 2e of the light emitting surface 2b. Can do.
- the colored layer 4 can also be formed only in the edge part 2e of the light-projection surface 2b.
- the colored layer 4 is preferably formed from the side surface 2c of the container 2 as shown in FIG. 3 or from the side surface 2c of the container 2 to the end 2e of the light emitting surface 2b as shown in FIG. 4A.
- the end 2e of the light exit surface 2b faces the side region 7 between the storage space 5 and the side surface 2c. Therefore, the end 2e does not face the storage space 5 filled with the wavelength conversion layer 3. Accordingly, the colored layer 4 provided at the end 2e of the light exit surface 2b is preferably located on both sides of the storage space 5 filled with the wavelength conversion layer 3 and does not face the storage space 5, but the light exit surface 2b.
- the colored layer 4 may be formed to be slightly longer and may partially face the storage space 5.
- the colored layer 4 is included in the allowable range as long as it faces about 1/3 or less of the width of the storage space 5.
- the colored layer 4 is preferably formed on the entire surface of the side surface 2c or the end portion 2e, but may not necessarily be the entire surface, and may be a part of the side surface 2c or the end portion 2e. However, the colored layer 4 preferably covers an area of 50% or more of the side surface 2c or the end 2e. Further, the colored layer 4 may be formed by using all or part of the side region 7 as a colored material instead of being formed on the side region 7. For example, all or part of the side region 7 can be formed by using white glass or white resin.
- the colored layer 4 is formed on the outer surface of the container 2, but the colored layer 4 can also be formed on the wall surface 5a of the storage space 5 as shown in FIG. 4C.
- the wall surface 5 a that forms the colored layer 4 is located at a position facing the side surface 2 c of the container 2.
- the side portion 2 f of the container 2 between the side surface 2 c of the container 2 and the storage space 5 can be the colored layer 4.
- the container 2 is molded in two colors, and at this time, a colored resin is used for a portion to be the side portion 2 f of the container 2.
- the container 2 shown in FIG. 4D can be formed by bonding the side part 2f of the container 2 and the other part by bonding or the like.
- the same reference numerals as those in FIGS. 4A and 4B indicate the same parts as those in FIGS. 4A and 4B.
- FIG. 5 is a cross-sectional view of the wavelength conversion member 1 shown in FIG. 1 cut along the line CC and viewed from the arrow direction.
- stepped portions 80 in which the wavelength conversion layer 3 is recessed from the container 2 are formed at both ends of the wavelength conversion member 1.
- a chip 82 as a colored layer covering the step portion 80 is connected via an adhesive layer 81.
- the chip 82 is formed in a shape substantially opposite to the stepped portion 80 and has a shape in which a portion facing the wavelength conversion layer 3 protrudes.
- the chip 82 is made of, for example, Al, but the material is not particularly limited.
- the adhesive layer 81 preferably has a water resistance barrier property.
- a colored layer may be formed on both ends of the wavelength conversion member 1 without forming the stepped portion 80.
- light leakage from both ends of the wavelength conversion member 1 can be suppressed, and color conversion can be performed appropriately and efficiently compared to the conventional case.
- the distance L1 between the light incident surface 2a and the wavelength conversion layer 3 is larger than the distance L2 between the light emission surface 2b and the wavelength conversion layer 3.
- the cross-sectional shape is preferably such that the outer shape of the container 2 and the storage space 5 is rectangular.
- the side surface 2c of the container 2 and the side wall surface of the storage space 5 can be curved or elliptical.
- the outer shape of the container 2 and the storage space 5 is square, but the outer shape of the container 2 and the storage space 5 can be rectangular as shown in FIG. 6B.
- the distance L1 between the light incident surface 2a and the wavelength conversion layer 3 is set to be the light emitting surface 2b rather than the cross-sectional shape including the curved surface.
- the distance L2 between the wavelength conversion layer 3 and the wavelength conversion layer 3 can be appropriately and easily increased.
- the colored layer 4 is easy to form.
- the external shape of the cross section of the container 2 and the storage space 5 is mutually similar, as shown in FIG. 6C, the external shape of the cross section of the container 2 and the external shape of the cross section of the storage space 5 are different. You can also.
- the outer shape of the cross section of the container 2 is a rectangular shape, and the outer shape of the cross section of the storage space 5 is a hexagon.
- the outer shape of the cross section of the container 2 and the storage space 5 can be made similar to each other in a trapezoidal shape.
- the short side of the trapezoid is the light incident surface 2a
- the long side is the light emitting surface 2b.
- the light emitted from the light source can be enlarged to a predetermined size.
- the long side of the trapezoid may be the light incident surface 2a and the short side may be the light emitting surface 2b, contrary to FIG. 6D. Thereby, the light emitted from the light source can be condensed to a predetermined size.
- the outer shape of the cross section of the container 2 and the storage space 5 is different from that of FIG. 6D, and the side surfaces are formed at positions symmetrical with respect to the center line passing through the centers of the upper and lower trapezoids. May be.
- the distance L1 between the light incident surface 2a and the wavelength conversion layer 3 is made larger than the distance L2 between the light emission surface 2b and the wavelength conversion layer 3.
- the colored layer 4 shown in FIG. 3 and FIG. 4 can be provided with respect to each structure shown in FIG.
- the light incident surface and the light exit surface are formed as flat surfaces, but either one or both of the light incident surface and the light exit surface may be formed as curved surfaces.
- the side surface of the container 2 is formed as a flat surface, but the side surface may be formed as a curved surface.
- the corners between the sides may be R-shaped. That is, expressions such as a rectangular shape, a hexagonal shape, a trapezoidal shape, etc. are not limited to geometrically accurate quadrangular shapes, hexagonal shapes, trapezoidal shapes, etc., and lines and angles constituting these have distortions, or Including errors are also included. By these, the direction of the emitted light can be adjusted.
- FIG. 7 is a perspective view in which an identification portion is provided on the wavelength conversion member shown in FIG.
- FIG. 8 is a perspective view of a wavelength conversion member provided with an identification unit different from FIG.
- an identification portion (marker) 15 for identifying the light incident surface 2a side and the light emitting surface 2b side is provided on the front surface 2d of the wavelength conversion member 1.
- the front surface is a surface provided with an opening of the storage space 5 by connecting the light incident surface 2 a side and the light emitting surface 2.
- the identification part 15 is a portion colored by, for example, paint, ink, tape, or the like.
- the identification part 15 is provided in the area
- the identification unit 15 is provided on the light incident surface 2a side, but may be provided on the light emitting surface 2b side.
- the identification part 15 can also be provided in the side surface 2c instead of the front surface 2d.
- the wavelength conversion member 1 of this Embodiment when viewed from the wavelength conversion layer 3, the light incident surface 2a side is thicker than the light emitting surface 2b side. For this reason, when the wavelength conversion member 1 of this Embodiment is arrange
- the wavelength conversion member 1 can be arranged so as to be opposed and adjusted so that the light emission surface 2 b faces the light guide plate 12.
- an identification unit 16 is provided in which the shape on the light emitting surface 2 b side is different from the shape on the light incident surface 2 a side.
- the edge portion on the light emitting surface 2b side is cut out to provide the identifying portion 16, but the identifying portion 16 may be provided on the light incident surface 2a side.
- a convex portion or a concave portion may be provided on one of the light incident surface 2a side and the light emitting surface 2b side in addition to the notch.
- the identification unit is not limited to the configuration shown in FIGS. Even if the identification unit cannot be identified by a person, the identification unit may be identified by the assembly device when the wavelength conversion member 1 is assembled by the control of the assembly device.
- FIG. 10 is an exploded perspective view of a light-emitting element provided with a wavelength conversion member according to the second embodiment of the present invention.
- FIG. 11 is an enlarged longitudinal sectional view taken along the line BB in the height direction and viewed from the arrow direction in a state where the wavelength conversion members shown in FIG. 10 are combined.
- FIG. 12 is a longitudinal sectional view of the light emitting element as seen from the direction of the arrow, cut in the height direction along the line BB shown in FIG. 10 in a state where the members of the light emitting element shown in FIG. 10 are combined.
- the 10 and 12 includes a wavelength converting member 21 and an LED chip (light emitting chip) 22.
- the wavelength conversion member 21 includes a container 25 formed of a plurality of pieces of a container main body 23 and a lid body 24. As shown in FIGS. 10, 11, and 12, a bottomed storage space 26 is formed at the center of the container body 23. A wavelength conversion layer 27 is formed in the storage space 26.
- the lid body 24 is joined to the container body 23 via an adhesive layer (not shown).
- the lower surface of the container 25 of the wavelength conversion member 21 is a light incident surface 25 a.
- the upper surface facing the light incident surface 25a is the light emitting surface 25b.
- a storage space 26 is formed at a position on the inner side with respect to each side surface 25c provided in the container 25 of the wavelength conversion member 21 shown in FIGS.
- the LED chip 22 is connected to a printed wiring board 29, and the periphery of the LED chip 22 is surrounded by a frame 30 as shown in FIGS.
- the inside of the frame 30 is sealed with a resin layer 31.
- the wavelength conversion member 21 is joined to the upper surface of the frame body 30 via an adhesive layer (not shown) to form a light emitting element 20 such as an LED.
- the storage space 26 is provided inside the light incident surface 25a and the light emitting surface 25b.
- the distance L1 between the light incident surface 25a and the wavelength conversion layer 27 is larger than the distance L2 between the light emission surface 25b and the wavelength conversion layer 27.
- the wavelength conversion layer 27 can be moved away from the LED chip 22, and as a result, the influence of the light and / or heat from the LED chip 22 on the quantum dots contained in the wavelength conversion layer 27 can be suppressed. It becomes possible to suppress the occurrence of changes.
- the wavelength conversion member 21 is disposed in contact with the resin layer 31 that seals the LED chip 22.
- the wavelength conversion member 21 and Even without providing a space between the resin layer 31 and the like the wavelength conversion layer 27 including quantum dots can be appropriately moved away from the LED chip 22, and the wavelength conversion member 21 can be easily and appropriately disposed. it can.
- the wavelength conversion member 21 is thin on the light emission surface 25b side when viewed from the wavelength conversion layer 27, and an increase in the thickness of the wavelength conversion member 21 can be suppressed. Therefore, by disposing the wavelength conversion member 21 of the present embodiment in contact with the resin layer 31, it is possible to realize the light emitting element 20 that can suppress the occurrence of blackening by reducing the thickness to the same level as before or thinner than the conventional one. .
- the colored layer 4 may be formed over the end of the emission surface 25b.
- the colored layer 4 may be formed on the side wall of the storage space 5 or provided from the side wall of the storage space 5 to the position of the side surface 25c.
- an identification unit for identifying the light incident surface 25 a side and the light emitting surface 25 b side can be provided.
- the discriminating unit can be configured in accordance with FIGS. 7 and 8, or can be configured differently from those in FIGS. 7 and 8.
- the wavelength conversion member 21 can be disposed to face the LED chip 22 without making a mistake in the direction of the incident surface 25a side and the light emission surface 25b side of the wavelength conversion member 21.
- FIG. 13 is a longitudinal sectional view of a light emitting element showing an example in which an identification portion is provided on the wavelength conversion member showing the second embodiment.
- the identification part 18 which consists of a recessed step part was provided in the edge part by the side of the light-incidence surface 25a.
- a convex portion 30 a is provided at a position facing the concave stepped portion as the identification portion 18.
- positioning the wavelength conversion member 21 on the frame 30 the identification part 18 provided in the wavelength conversion member 21 faces downward, and the convex part 30a provided in the frame 30 is made into the identification part (concave step part). ) Insert in 18.
- the wavelength conversion member 21 can be arranged and fixed on the frame body 30 by concave and convex fitting between the concave portion and the convex portion 30a as a concave portion in which the identification portion 18 is arranged inside the edge portion. Thereby, the vertical direction and the horizontal position of the wavelength conversion member 21 can be controlled at the same time, and the wavelength conversion member 21 can be aligned with the frame 30 with high accuracy.
- FIG. 14 is a longitudinal sectional view of a display device using the light emitting element shown in FIG.
- the display device 50 includes a plurality of light emitting elements 20 (LEDs) and a display unit 54 such as a liquid crystal display facing the light emitting elements 20.
- Each light emitting element 20 is disposed on the back side of the display unit 54.
- the plurality of light emitting elements 20 are supported by the support body 52.
- the light emitting elements 20 are arranged at a predetermined interval.
- Each light emitting element 20 and the support 52 constitute a backlight 55 for the display unit 54.
- the support 52 is not particularly limited in shape or material such as a sheet shape, a plate shape, or a case shape.
- a light diffusing plate 53 or the like is interposed between the backlight 55 and the display unit 54.
- the light-emitting device (including the light-emitting element, the capillary-shaped wavelength conversion member 1, the light guide plate 12, and the like) shown in FIG. 9 is disposed on the back side of the display unit 54 shown in FIG.
- the display device 50 may be configured.
- the wavelength conversion member and the light emitting element of the present embodiment can be applied to other types of light source devices, illumination devices, light diffusion devices, light reflection devices, and the like. it can.
- an LED, a backlight device, a display device, or the like can be realized using a wavelength conversion member in which a wavelength conversion layer is formed in a container. According to the wavelength conversion member of the present invention, the occurrence of blackening can be suppressed, and the light emission efficiency of an LED, backlight device, display device, or the like using the wavelength conversion member of the present invention can be improved.
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Abstract
Description
Claims (14)
- 光入射面、前記光入射面に対向する光出射面を備え、前記光入射面及び前記光出射面よりも内側に収納空間が設けられた容器と、
前記収納空間内に配置された量子ドットを有する波長変換層と、を有し、
前記光入射面と前記波長変換層との間の距離L1は、前記光出射面と前記波長変換層との間の距離L2に比べて大きいことを特徴とする波長変換部材。 - 前記波長変換層は、前記量子ドットを分散した樹脂組成物により形成されることを特徴とする請求項1に記載の波長変換部材。
- 前記光入射面と前記光出射面との間を繋ぐ側面上、前記光出射面の端部上、又は、前記側面上から前記光出射面の端部上にかけて着色層が形成されていることを特徴とする請求項1又は2に記載の波長変換部材。
- 前記光入射面と前記光出射面との間を繋ぐ側面よりも内側に前記収納空間が設けられ、前記収納空間内の壁面に着色層が形成されていることを特徴とする請求項1又は2に記載の波長変換部材。
- 前記光入射面と前記光出射面との間を繋ぐ側面よりも内側に前記収納空間が設けられ、前記容器の前記側面と前記収納空間までの間に着色層が設けられていることを特徴とする請求項1又は2に記載の波長変換部材。
- 前記着色層は、白色に着色されていることを特徴とする請求項3ないし5のいずれかに記載の波長変換部材。
- 前記着色層は塗料、インク、あるいはテープにより構成されることを特徴とする請求項3ないし6のいずれかに記載の波長変換部材。
- 前記光入射面側と前記光出射面側とを識別するための識別部が設けられていることを特徴とする請求項1ないし7のいずれかに記載の波長変換部材。
- 発光素子と、前記発光素子の発光側に配置される請求項1ないし8のいずれかに記載の波長変換部材と、を有して構成されることを特徴とする発光装置。
- 前記発光素子と前記波長変換部材とが接して配置されていることを特徴とする請求項9に記載の発光装置。
- 発光チップと、前記発光チップの光出射側に配置された請求項1ないし8のいずれかに記載の波長変換部材と、を有して構成されることを特徴とする発光素子。
- 前記発光チップを覆う樹脂層と前記波長変換部材とが接して配置されていることを特徴とする請求項11に記載の発光素子。
- 請求項9又は10に記載の発光装置、あるいは、請求項11又は12に記載の発光素子と、導光板と、を有することを特徴とする光源装置。
- 表示部と、前記表示部の裏面側に配置された請求項9又は10に記載の発光装置、あるいは、請求項11又は12に記載の発光素子と、を有することを特徴とする表示装置。
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JP2016557714A JPWO2016072311A1 (ja) | 2014-11-04 | 2015-10-27 | 波長変換部材、及びそれを用いた発光装置、発光素子、光源装置、並びに表示装置 |
US15/522,362 US10422937B2 (en) | 2014-11-04 | 2015-10-27 | Wavelength converting member, and light emitting device, light emitting element, light source unit, and display device using wavelength converting member |
CN201580059677.5A CN107210343A (zh) | 2014-11-04 | 2015-10-27 | 波长转换部件及使用它的发光装置、发光元件、光源装置以及显示装置 |
EP15856967.3A EP3217443A4 (en) | 2014-11-04 | 2015-10-27 | Wavelength conversion member, and light-emitting device, light-emitting element, light source device, and display device using wavelength conversion member |
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JP2014224052 | 2014-11-04 | ||
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JP7005916B2 (ja) | 2017-03-17 | 2022-01-24 | 大日本印刷株式会社 | 光波長変換組成物、光波長変換部材、発光装置、バックライト装置、および画像表示装置 |
JP2019139027A (ja) * | 2018-02-08 | 2019-08-22 | 東レエンジニアリング株式会社 | 光変換体の製造方法、光変換体の製造装置、および光変換体 |
JP7025233B2 (ja) | 2018-02-08 | 2022-02-24 | 東レエンジニアリング株式会社 | 光変換体の製造方法、光変換体の製造装置、および光変換体 |
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TW201630221A (zh) | 2016-08-16 |
TWI697137B (zh) | 2020-06-21 |
EP3217443A1 (en) | 2017-09-13 |
US10422937B2 (en) | 2019-09-24 |
US20170315288A1 (en) | 2017-11-02 |
JPWO2016072311A1 (ja) | 2017-08-24 |
CN107210343A (zh) | 2017-09-26 |
EP3217443A4 (en) | 2018-06-06 |
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