WO2017135584A1 - Plaque de phosphore utilisant un diffuseur de lumière - Google Patents

Plaque de phosphore utilisant un diffuseur de lumière Download PDF

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Publication number
WO2017135584A1
WO2017135584A1 PCT/KR2017/000293 KR2017000293W WO2017135584A1 WO 2017135584 A1 WO2017135584 A1 WO 2017135584A1 KR 2017000293 W KR2017000293 W KR 2017000293W WO 2017135584 A1 WO2017135584 A1 WO 2017135584A1
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WO
WIPO (PCT)
Prior art keywords
light
phosphor
diffusing agent
phosphor plate
light diffusing
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Ceased
Application number
PCT/KR2017/000293
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English (en)
Korean (ko)
Inventor
이상준
정몽권
김영식
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Hyosung Corp
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Hyosung Corp
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Publication date
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Publication of WO2017135584A1 publication Critical patent/WO2017135584A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent materials, e.g. electroluminescent or chemiluminescent
    • C09K11/08—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials
    • C09K11/77—Luminescent materials, e.g. electroluminescent or chemiluminescent containing inorganic luminescent materials containing rare earth metals
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/85—Packages
    • H10H20/851—Wavelength conversion means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the present invention relates to a phosphor plate using a light diffusing agent, and more particularly, to a phosphor plate in which light efficiency is increased by diffusing light inside the plate by adding a light diffusing agent to the inside of the phosphor plate.
  • a method of implementing a white light emitting device using an LED includes a method of implementing white by using an ultraviolet LED light source and exciting red, green, and blue phosphors, which are three primary colors of light, using a blue LED as a light source, and using a red and green phosphor. It can be classified into three ways: the method of realizing white by excitation and the method of realizing white by exciting a yellow phosphor using a blue LED as a light source.
  • white LEDs are widely used as high-efficiency, high-reliability white illumination light sources, but generally, a method widely used at present is using a blue LED element with a yellow phosphor and matrixing resin.
  • blue light tends to deteriorate the resin because of strong energy, discoloration occurs or heat emission is poor, and thus the emission color changes to yellow due to temperature rise.
  • Korean Patent Laid-Open No. 10-2015-0091614 discloses an oxide mixture composed of silicon oxide (SiO 2 ), boron oxide (B 2 O 3 ), and zinc oxide (ZnO); And an oxide comprising any one or more oxides of the metals of Group I or Group II, wherein the content of the oxide containing boron oxide and the metals of Group I or Group II is 35% by weight or less in the total composition.
  • a glass phosphor for glass and a glass frit obtained by vitrifying the glass composition for a photoconversion device as a matrix, and a ceramic phosphor plate obtained by sintering at least one phosphor is proposed.
  • Phosphor plates are focused on improving the properties of the phosphor by specifying various components contained in the phosphor, mixing particulates or forming various layers.
  • Japanese Laid-Open Patent Publication No. 2011-188001 discloses a solid light emitting device, which includes one or more of a solid light emitting die and an optical element such as a photo light emitting element, a refractive element, a filter element, a scattering element, a diffusion element or a reflective element. It has been proposed the above solid state light emitting device having a layer that is optically bonded using a transparent and inflexible rigid plate and a solid state light emitting die. In this case, the improvement of the luminous effect is pursued, but the material composition is complicated and it is uneconomical.
  • Korean Patent Laid-Open No. 10-2014-0035553 proposes a method of forming a fluorescent film by inserting a phosphor into glass.
  • this case has a problem that the thermal stability is lowered when applying a high output light emitting diode compared to the ceramic plate.
  • the prior arts have a problem in that the efficiency of light converted when laser and LD are irradiated is low.
  • the laser diode LD does not exhibit luminous efficiency loss, and in many cases exhibits increased efficiency with increasing current and maintains color stability.
  • LDs solid state white lighting elements
  • Patent Document 1 Korean Patent Publication No. 10-2015-0091614
  • Patent Document 2 Japanese Patent Application Publication No. 2011-188001
  • Patent Document 3 Korean Patent Publication No. 10-2014-0035553
  • Patent Document 4 Patent Document 4
  • an object of the present invention is to improve the conversion efficiency of light converted when laser or LD is irradiated to the phosphor plate.
  • an object of the present invention is to provide a phosphor plate in which the light conversion efficiency is shaped by using a light diffusing agent when manufacturing the phosphor plate.
  • the present invention is a light diffusing agent is contained in the light conversion matrix in which the phosphor is dispersed, the light diffusing agent is characterized in that the light diffusing agent is dispersed in 30 to 60% by weight relative to the light conversion matrix Provide the phosphor plate used.
  • the thickness uniformity of the plate is excellent by precision surface processing as compared with the conventional paste packaging, so that high color contrast of 100: 1 or more and low color scattering can be realized. .
  • thermal color coordinate shifts are reduced, excellent emission uniformity is solved, and binning problems are solved through screening of fluorescence characteristics in the pre-mounting stage of the plate, and stability and reliability are applied when high-power LEDs and LDs are applied. The effect such as can be expected.
  • the phosphor plate according to the present invention can significantly increase the light conversion efficiency compared to the conventional phosphor plate due to the use of a light diffusing agent.
  • FIG. 1 is a diagram showing the configuration of a fluorescent plate according to the prior art.
  • FIG. 2 is a diagram schematically illustrating a phosphor plate constructed using a light diffusing agent according to the present invention in the configuration of FIG. 1.
  • FIG. 3 is a diagram illustrating a manufacturing process of a phosphor plate using the light diffusing agent of the present invention.
  • the present invention improves the light conversion rate by adding a light diffusing agent to an existing phosphor plate.
  • a plate composed of pure phosphors may be applied as the photoactive matrix of the phosphor plate used in the present invention.
  • a conventional resin component may be further used as the light conversion matrix constituting the phosphor plate.
  • Al 2 O 3 , Al (NO 3 ) 3 are preferable. Or at least one selected from materials having a spinel structure represented by Formula 1, more preferably Al 2 O 3 Alternatively, a mixture of Al 2 O 3 and a material having a spinel structure of Formula 1 may be used.
  • a and B are each different metal elements, preferably A is Mg and B is Al.
  • the light diffusing agent according to the present invention may be used, for example, having an average particle diameter of 100 nm to 1 ⁇ m.
  • the phosphor may be composed of an inorganic receptor material doped with an optically activated element.
  • Most of the receptors can be used garnet having the formula A 3 B 5 O 12 . Where A and B mean applicable chemical components.
  • Y 3 Al 5 O 12 which is a yttrium aluminum garnet (YAG) can be used.
  • a ruthenium aluminum garnet (LAG) system a nitride system, a sulfide system, a silicate system, or a mixture of two or more thereof may be used.
  • a phosphor precursor Y 3 Al 5 O 12 having an average particle diameter of 100 nm to 1 ⁇ m may be used. If the particle size has an average particle diameter of more than 1 ⁇ m, the grain size increases, so that the voids increase, which may cause problems of efficiency and reliability deterioration.
  • a rare earth material used as an optically active dopant may include rare earth oxides and rare earth compounds. Most rare earth elements can be optically activated.
  • the rare earth emitters may be cerium (Ce) used for white light YAG phosphors, nedydium (Nd) used for lasers, erbium (Er) used in optical amplifiers, and thorium (Th) oxide used as visible light blocking materials. .
  • the most suitable component for use as the phosphor particles in the present invention it should not be an isotropic structure because it should not disturb the crystal formation of the YAG upon firing the YAG plate, and should be able to diffuse light. In the case of having an isotropic structure, light diffusion may not be performed and thus may not be used.
  • the spatial distribution of phosphors in white LED lamps greatly affects the color uniformity and efficiency of the lamps.
  • Such a phosphor distribution can be distinguished by a distribution of phosphors in close proximity and phosphors far away.
  • Remote phosphor distribution is a structure in which phosphors are spatially separated from a semiconductor die. Phosphor particles may vary in distribution due to a combination of gravity, buoyancy, and friction. In general, large phosphor particles move downward and thicker on the surface of the LED die.
  • the phosphor distribution of uniform thickness can provide a small light emitting area and high luminance.
  • any one or more selected from acrylic organic particles, silicon glass particles, and silica beads may be used as the light diffusing agent.
  • the light diffusing agent according to the present invention has a particle size of less than 100 nm of the average particle diameter, the color of the transmitted light changes to a red or yellow system, and may cause a problem that the diffusion effect is also reduced.
  • the particle size exceeds 1 ⁇ m because the light diffusion effect is insufficient to add an excessively large amount of the diffusing agent may cause a problem that results in the deterioration of other physical properties.
  • the light diffusing agent as described above is preferably included in 30 to 60% by weight, more preferably 40 to 60% by weight relative to the light conversion matrix. If the content is too small, sufficient light diffusion effect cannot be obtained, and when it exceeds 60% by weight, the light efficiency is lowered and the transmittance of the blue laser light is increased, which makes it difficult to tune the chromaticity.
  • the present invention is to solve the problem of low light efficiency that is converted by irradiating laser and LED in the case of a conventional phosphor plate, by adding a light diffusing agent inside the phosphor plate, by dispersing the light that can not be converted inside It is possible to increase the light efficiency converted by zooming.
  • the structure of the light conversion matrix 10 in which the conventional phosphor 20 is dispersed is shown.
  • the surface of the phosphor plate 30 is covered with a dichroic mirror 40. Therefore, when light irradiation is applied to the light conversion matrix 10, the light conversion efficiency is not very large.
  • FIG. 2 is a diagram illustrating a phosphor plate 300 using a light diffusing agent 500 according to the present invention.
  • the light diffusing agent 500 is dispersed in the phosphor plate 300.
  • reference numeral 200 denotes a phosphor and 400 denotes a dichroic mirror.
  • FIG. 3 is a schematic diagram illustrating a manufacturing process of a phosphor plate by using a light diffusing agent according to the present invention.
  • each process condition is described in detail for each process in the process of manufacturing the phosphor plate using the light diffusing agent according to the present invention.
  • the advantage of the phosphor plate as compared with the conventional paste packaging is that the surface uniformity of the plate is excellent due to the precision surface processing, thereby achieving a high color contrast of at least 100: 1 and at the same time low color scattering, color shift) reduction, excellent emission uniformity, resolution of binning problem through fluorescence screening at the pre-mounting stage, and stability and reliability when applying high power LED and LD.
  • the present invention can increase the light conversion efficiency compared to the conventional phosphor plate.
  • a phosphor plate was prepared according to the process of FIG. 3 using Y 2 O 3 / Al 2 O 3 / CeO 2 as a raw material.
  • the weighing and ball mill conditions were carried out at 300 rpm for 20 hours, and the primary firing for the used precursor material was fired at 1200 ° C. for 12 hours.
  • the light diffusing agent was mixed by a ball mill and mixed for 20 hours while rotating at 300 rpm, and the plate was molded at a molding pressure of 3000 kgf / cm 2. At this time, the addition amount of the light diffusing agent was changed to 30% by weight, 40% by weight, 50% by weight and 60% by weight, respectively, to prepare samples.
  • a phosphor plate was prepared under the same conditions as in the above example, but a phosphor plate was prepared for a case in which no light diffusing agent was added or 30 to 60% by weight was released.
  • Sample Information Item ore Diffusion amount (% by weight) 0 10 20 30 40 50 60 70 80 90 Y3Al 5 O 12 : Ce 0 .01 Light quantity (lm) 144 151 162 183 194 195 183 159 143 90

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Luminescent Compositions (AREA)
  • Optical Filters (AREA)

Abstract

La présente invention concerne une plaque de phosphore qui utilise un diffuseur de lumière et, plus particulièrement, une plaque de phosphore dans laquelle un diffuseur de lumière est ajouté afin de diffuser de la lumière à l'intérieur de la plaque, augmentant ainsi le rendement de la lumière destinée à être convertie.
PCT/KR2017/000293 2016-02-04 2017-01-09 Plaque de phosphore utilisant un diffuseur de lumière Ceased WO2017135584A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0014520 2016-02-04
KR1020160014520A KR20170093320A (ko) 2016-02-04 2016-02-04 광 확산제를 사용한 형광체 플레이트

Publications (1)

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WO2017135584A1 true WO2017135584A1 (fr) 2017-08-10

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PCT/KR2017/000293 Ceased WO2017135584A1 (fr) 2016-02-04 2017-01-09 Plaque de phosphore utilisant un diffuseur de lumière

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KR (1) KR20170093320A (fr)
TW (1) TWI619906B (fr)
WO (1) WO2017135584A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110429167A (zh) * 2019-07-17 2019-11-08 武汉大学 实现高空间颜色均匀性的led封装方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112837612A (zh) * 2021-02-23 2021-05-25 常州亚玛顿股份有限公司 一种扩散板及其制作方法

Citations (5)

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KR200321798Y1 (ko) * 2003-04-30 2003-07-31 서울반도체 주식회사 파장 변환 필름 및 이를 사용하는 표시 장치
KR100507844B1 (ko) * 2005-01-19 2005-08-17 주식회사 맥스필 광확산 및 파장 변환 필름
JP2009032524A (ja) * 2007-07-26 2009-02-12 Panasonic Electric Works Co Ltd Ｌｅｄ照明装置
US20140146518A1 (en) * 2012-11-29 2014-05-29 Hon Hai Precision Industry Co., Ltd. Backlight module incorporating light-diffusion and light-conversion plate
KR20150089599A (ko) * 2014-01-28 2015-08-05 전남대학교산학협력단 열적안정성 및 수분저항성이 향상된 형광체 플레이트, 그 형광체 플레이트 제조방법 및 이를 포함하는 led 소자

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KR100589405B1 (ko) * 2003-11-20 2006-06-14 삼성에스디아이 주식회사 진공자외선을 여기원으로 하는 발광소자용 녹색형광체와그 제조방법 및 이를 포함하는 발광소자
US8441179B2 (en) * 2006-01-20 2013-05-14 Cree, Inc. Lighting devices having remote lumiphors that are excited by lumiphor-converted semiconductor excitation sources
US9995458B2 (en) * 2014-01-13 2018-06-12 Lg Innotek Co., Ltd. Ceramic phosphor plate and lighting device including the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200321798Y1 (ko) * 2003-04-30 2003-07-31 서울반도체 주식회사 파장 변환 필름 및 이를 사용하는 표시 장치
KR100507844B1 (ko) * 2005-01-19 2005-08-17 주식회사 맥스필 광확산 및 파장 변환 필름
JP2009032524A (ja) * 2007-07-26 2009-02-12 Panasonic Electric Works Co Ltd Ｌｅｄ照明装置
US20140146518A1 (en) * 2012-11-29 2014-05-29 Hon Hai Precision Industry Co., Ltd. Backlight module incorporating light-diffusion and light-conversion plate
KR20150089599A (ko) * 2014-01-28 2015-08-05 전남대학교산학협력단 열적안정성 및 수분저항성이 향상된 형광체 플레이트, 그 형광체 플레이트 제조방법 및 이를 포함하는 led 소자

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110429167A (zh) * 2019-07-17 2019-11-08 武汉大学 实现高空间颜色均匀性的led封装方法

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KR20170093320A (ko) 2017-08-16
TW201738502A (zh) 2017-11-01
TWI619906B (zh) 2018-04-01

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