WO2018124858A1 - Luminophore ayant une grande reproductibilité de couleur, revêtu d'un agent absorbant la lumière de 550 à 600 nm, et del utilisant ce luminophore - Google Patents

Luminophore ayant une grande reproductibilité de couleur, revêtu d'un agent absorbant la lumière de 550 à 600 nm, et del utilisant ce luminophore Download PDF

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Publication number
WO2018124858A1
WO2018124858A1 PCT/KR2018/000066 KR2018000066W WO2018124858A1 WO 2018124858 A1 WO2018124858 A1 WO 2018124858A1 KR 2018000066 W KR2018000066 W KR 2018000066W WO 2018124858 A1 WO2018124858 A1 WO 2018124858A1
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WO
WIPO (PCT)
Prior art keywords
phosphor
high color
led
coated
oxide
Prior art date
Application number
PCT/KR2018/000066
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English (en)
Korean (ko)
Inventor
유영철
권오성
조병옥
한승택
임형섭
Original Assignee
(주)석경에이티
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by (주)석경에이티 filed Critical (주)석경에이티
Priority claimed from KR1020180000242A external-priority patent/KR102161109B1/ko
Publication of WO2018124858A1 publication Critical patent/WO2018124858A1/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, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • 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

Definitions

  • the present invention relates to a phosphor and an LED (Display) that implement color reproducibility such as high temperature reliability and color purity maintenance.
  • the LED can realize various colors by adjusting the composition ratio of the compound semiconductor, so that the three primary colors of RED, GREEN, and BLUE light can be synthesized. Phosphor used for this is used as the main material to realize the white of the LED.
  • the LED phosphor absorbs the light emitted from the LED and emits light. When the absorbed light is converted into light of different wavelengths and applied to the blue LED, it can be combined with blue light emitted from the blue LED and light of different colors emitted by the excited fluorescent material to produce a color other than blue. It is. Therefore, the brightness, color rendering, color temperature, etc. of the final LED light source is determined by the light conversion efficiency and the light color of the fluorescent material, so it may be very important to use an appropriate phosphor in an illumination white LED.
  • An object of the present invention is to produce a phosphor with a high color reproducibility by selectively absorbing only yellow light by coating on green or red phosphor using an oxide and acetate of 20nm or less having a purple color, which is a complementary color of yellow.
  • an object of the present invention is to produce an LED using a high color reproducible phosphor exhibiting a color reproducibility of 100% of DCI and NTSC of 100% or more.
  • the present invention comprises the steps of preparing a liquid light absorber comprising hydrothermally treating the particles of less than 20nm of purple selected from the group consisting of Nd-based compounds and oxides, Nb-based compounds and compounds, Co-based compounds and oxides;
  • a yellow light absorbing material (Yellow light absorption materials) is coated on a green or red phosphor and used to produce a phosphor exhibiting a DCI superposition ratio of 100% or color gamut of NTSC 100% or more.
  • the present invention is characterized by coating the green or red phosphors using an oxide and an acetate of 20 nm or less having a purple color, which is a complementary color of yellow, to selectively absorb only yellow light, thereby improving color reproducibility.
  • the coating material uses particles of 0.1 to 50 nm of Nd compounds and oxides, Nb compounds and compounds, Co compounds and oxides. If the particle size is larger than 50 nm, there is a problem of lowering the luminance.
  • the coating content of the coating material is 1 to 100% by weight based on 100 weight of the phosphor, and the content of the coating material is less than the above range, the characteristic wavelength light absorption is inadequate, and if the content of the coating material is low, the brightness is reduced.
  • the coating method is characterized by uniformly mixing with the phosphor using a liquid light absorber and drying at 80 ⁇ 300 °C. At this time, if the drying temperature is less than 80 °C water or a solvent is present to reduce the fluorescence properties, if the drying temperature is higher than 300 °C to reduce the fluorescent properties due to phosphor degradation.
  • the green phosphor is Nitride-based, Silicate-based, the red phosphor is characterized by using the KSF, Sulfide-based.
  • the light absorption region of the phosphor according to the present invention is characterized by absorbing yellow light of 560 ⁇ 600nm.
  • the phosphor of the present invention is a high color reproducible phosphor, which exhibits a color reproduction ratio of 100% of DCI and NTSC of 100% or more.
  • Another aspect of the invention is characterized in that for producing an LED comprising the high color reproducible phosphor.
  • the present invention by using the microparticles of 20nm or less, even if a large amount is used, it is possible to minimize the luminance decrease.
  • the phosphor of the present invention absorbs unnecessary light in the 560 ⁇ 600nm band is possible to reproduce a high color.
  • the phosphor of the present invention is capable of NTSC 100% or more color reproduction and DTI overlap ratio 100%.
  • the phosphor of the present invention has an effect of improving reliability and maintaining optical characteristics, and thus, a light emitting device having excellent fluorescent characteristics can be manufactured.
  • 1 and 2 are graphs showing the optical property evaluation results of the light absorber of the present invention.
  • the DCI overlap ratio may be achieved at 100% and the color gamut of NTSC may be greater than 100%.
  • the present invention is characterized in that the color is increased by selectively absorbing only yellow light by coating on green or red phosphors using oxides and acetates of 20 nm or less having a purple color, which is a complementary color of yellow.
  • Nd compounds and oxides (best), Nb compounds and compounds, Co compounds and oxides, 0.1-50 nm particles were used. If the particles are larger than this size, the brightness is lowered.
  • the content of the coating material was 1 to 100% by weight based on 100 weight of the phosphor.
  • the liquid absorber was uniformly mixed with the phosphor and dried at 80 to 300 ° C.
  • the drying temperature is lower than 80 ° C, the fluorescent property is reduced due to the presence of moisture or a solvent.
  • the drying temperature is higher than 300 ° C, the fluorescent property is reduced due to phosphor degradation.
  • Nitride type and Silicate type were used as green phosphors, and KSF and Sulfide type were used as red phosphors.
  • the phosphor coated with the light absorbing material of the present invention absorbed the row light of 560-600 nm.
  • the wavelength absorption varies depending on the content of the light absorption coating materials.
  • Nd-Acetate + Acetic acid + pure water mixture was treated with hydrothermal (Hydro thermal, 120 ⁇ 250 °C) to prepare a highly transparent Nd 2 O 3 Sol of less than 10nm of purple.
  • Highly transparent Nd 2 O 3 Sol and the phosphor were uniformly mixed by content, and then uniformly dried at 80 to 300 ° C. while removing H 2 O using an evaporator.
  • Phosphor and LED display manufactured according to the present invention can be seen that the high color reproduction is possible by absorbing unnecessary light in the 560 ⁇ 600nm band, NTSC 100% or more color reproduction and DTI overlap ratio 100% is possible.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Luminescent Compositions (AREA)

Abstract

La présente invention est caractérisée en ce qu'elle concerne : un luminophore ayant une grande reproductibilité de couleur, dont la reproductibilité de couleur a été renforcée par application d'un oxyde et acétate violet de 0,1 à 50 nm, qui est un matériau absorbant la lumière jaune, sur un luminophore vert ou rouge. L'invention concerne également un dispositif qui permet de fabriquer une DEL. Selon la présente invention, des particules fines sont utilisées, de sorte qu'il est possible de réduire à un minimum une réduction de la luminance même lorsqu'une grande quantité est utilisée. Le luminophore de la présente invention peut absorber la lumière non nécessaire dans la bande de 560 à 600 nm afin d'obtenir une grande reproductibilité de couleur, et peut obtenir une gamme de couleurs supérieure ou égale à NTSC de 100 %, ainsi qu'un taux de redondance du DTI de 100 %.
PCT/KR2018/000066 2016-12-30 2018-01-02 Luminophore ayant une grande reproductibilité de couleur, revêtu d'un agent absorbant la lumière de 550 à 600 nm, et del utilisant ce luminophore WO2018124858A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20160183747 2016-12-30
KR10-2016-0183747 2016-12-30
KR10-2018-0000242 2018-01-02
KR1020180000242A KR102161109B1 (ko) 2016-12-30 2018-01-02 550~600nm 광흡수제가 코팅된 고색재현성 형광체 및 이를 이용한 LED

Publications (1)

Publication Number Publication Date
WO2018124858A1 true WO2018124858A1 (fr) 2018-07-05

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PCT/KR2018/000066 WO2018124858A1 (fr) 2016-12-30 2018-01-02 Luminophore ayant une grande reproductibilité de couleur, revêtu d'un agent absorbant la lumière de 550 à 600 nm, et del utilisant ce luminophore

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WO (1) WO2018124858A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5717282A (en) * 1995-02-20 1998-02-10 U.S. Philips Corporation Display device comprising a display screen having a light-absorbing coating
US20050064208A1 (en) * 2002-01-24 2005-03-24 Boehmer Marcel Rene Light-transmitting substrate provided with a light-absorbing coating
KR20110062155A (ko) * 2009-12-02 2011-06-10 삼성에스디아이 주식회사 녹색 형광체 및 이를 포함하는 디스플레이 소자
US20120018761A1 (en) * 2009-03-27 2012-01-26 Konica Minolta Opto, Inc. Phosphor member, method of manufacturing phosphor member, and illuminating device
US20130002124A1 (en) * 2011-06-28 2013-01-03 Sharp Kabushiki Kaisha Light emitting device and method for producing the same
WO2015199310A1 (fr) * 2014-06-27 2015-12-30 엘지전자 주식회사 Unité de rétroéclairage et dispositif d'affichage la comprenant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5717282A (en) * 1995-02-20 1998-02-10 U.S. Philips Corporation Display device comprising a display screen having a light-absorbing coating
US20050064208A1 (en) * 2002-01-24 2005-03-24 Boehmer Marcel Rene Light-transmitting substrate provided with a light-absorbing coating
US20120018761A1 (en) * 2009-03-27 2012-01-26 Konica Minolta Opto, Inc. Phosphor member, method of manufacturing phosphor member, and illuminating device
KR20110062155A (ko) * 2009-12-02 2011-06-10 삼성에스디아이 주식회사 녹색 형광체 및 이를 포함하는 디스플레이 소자
US20130002124A1 (en) * 2011-06-28 2013-01-03 Sharp Kabushiki Kaisha Light emitting device and method for producing the same
WO2015199310A1 (fr) * 2014-06-27 2015-12-30 엘지전자 주식회사 Unité de rétroéclairage et dispositif d'affichage la comprenant

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