KR102161109B1 - HIGH COLOR REPRODUCIBILITY PHOSPHOR COATED WITH 550 ~ 600nm LIGHT ABSORBING AGENT AND LED USING THE SAME - Google Patents
HIGH COLOR REPRODUCIBILITY PHOSPHOR COATED WITH 550 ~ 600nm LIGHT ABSORBING AGENT AND LED USING THE SAME Download PDFInfo
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Abstract
본 발명은 노란색 흡광제(Yellow light absorption materials)인 보라색의 0.1~50nm 의 산화물 및 초산염을 녹색 또는 적색 형광체에 코팅하여 색재현성을 높인 고색재현성 형광체 및 이를 이용한 LED 제조 장치를 제공하는 것을 특징으로 한다.
본 발명에 따르면 미세입자를 사용하여 많은 양을 사용하여도 휘도 저하 최소화 가능하다. 본 발명의 형광체는 560~600nm대의 불필요한 광을 흡수하여 고색재현이 가능하며 NTSC 100%이상의 색재현율 및 DTI 중첩비 100% 가능하다.The present invention is characterized by providing a high color reproducibility phosphor having improved color reproducibility by coating a purple 0.1-50 nm oxide and acetate as a yellow light absorption material on a green or red phosphor, and an LED manufacturing apparatus using the same. .
According to the present invention, it is possible to minimize the decrease in luminance even when a large amount of fine particles are used. The phosphor of the present invention is capable of high color reproduction by absorbing unnecessary light in the range of 560 ~ 600 nm, and a color reproduction rate of 100% or more of NTSC and 100% of DTI overlap ratio are possible.
Description
본 발명은 고온 신뢰성 및 색순도 유지 등의 색재현성을 구현한 형광체 및 LED(Display)에 관한 것이다.The present invention relates to a phosphor and an LED (display) implementing color reproducibility such as high temperature reliability and color purity maintenance.
LED는 화합물 반도체의 조성비를 조절함으로써 다양한 색상 구현이 가능하여 RED, GREEN, BLUE 빛의 삼원색을 합성하여 나타낼 수 있다. 이에 사용되는 형광체가 LED의 백색을 구현하게 하는 주요 소재로 사용되고 있다. LED 형광체는 LED로부터 방출된 광을 흡수하여 빛을 발광하는 역할을 한다. 흡수한 빛을 다른 파장의 빛으로 바꾸어 방출하는 물질로 이를 청색 LED에 적용하면 청색 LED에서 나오는 청색광과 이에 의해 여기된 형광 물질이 방출하는 다른 색의 빛이 조합되어 청색 외에 다른 색을 만들어 낼 수 있는 것이다. 따라서 형광 물질의 광 변환 효율과 광색에 의해 최종 LED광원의 휘도,연색성,색온도 등이 결정되기 때문에 조명용 백색 LED에 있어 적절한 형광체의 사용은 매우 중요하다 할 수 있다.LED can realize various colors by adjusting the composition ratio of compound semiconductor, and thus can be displayed by synthesizing the three primary colors of RED, GREEN, and BLUE light. The phosphor used for this is used as a main material to realize the white color of the LED. The LED phosphor absorbs light emitted from the LED and emits light. It is a material that converts absorbed light into light of a different wavelength and emits it.If this is applied to a blue LED, the blue light emitted from the blue LED and the light of another color emitted by the fluorescent material excited by it are combined to create a color other than blue. There is. Therefore, since the luminance, color rendering, and color temperature of the final LED light source are determined by the light conversion efficiency and light color of the fluorescent material, it can be said that it is very important to use an appropriate phosphor for a white LED for lighting.
대부분의 LED가 컬러 필터(Color filter)를 적용한다 하더라도 DCI 중첩비 100%를 만족하기는 어렵고, NTSC의 경우도 OLED나 QDEF 필름을 사용하지 않은 LED용 형광체를 사용해서는 100% 이상의 색재현성을 나타내기가 어렵다.Even if most of the LEDs apply a color filter, it is difficult to satisfy 100% of the DCI overlap ratio, and even in the case of NTSC, 100% or more color reproducibility is achieved by using phosphors for LEDs that do not use OLED or QDEF film. It is difficult.
기존 재료는 Yellow 파장대를 흡수하는 재료는 많으나 입자 사이즈가 커서 휘도 저하를 크게 발생시켰고, 또한 유기 안료를 사용하여 고온 신뢰성 및 색순도 유지가 어려운 단점이 있었다.Existing materials have many materials that absorb the yellow wavelength band, but their large particle size caused a significant decrease in luminance, and there was a disadvantage that it was difficult to maintain high temperature reliability and color purity by using organic pigments.
본 발명의 목적은 노란색의 보색인 퍼플 컬러를 가진 20nm 이하의 산화물 및 초산염 등을 이용하여 그린이나 레드 형광체에 코팅하여 노란색 광만 선택적으로 흡수시켜 색재현성을 높인 형광체를 제조하는 것이다.An object of the present invention is to prepare a phosphor with improved color reproducibility by selectively absorbing only yellow light by coating on a green or red phosphor using an oxide and acetate of 20 nm or less having a purple color, which is a yellow complementary color.
또한 본 발명은 DCI 중첩비 100% 및 NTSC 100% 이상의 색재현율을 나타내는 고색재현성 형광체를 사용하여 LED 를 제조하는 것을 목적으로 한다.In addition, it is an object of the present invention to manufacture an LED using a high-color reproducible phosphor exhibiting a color reproducibility of 100% DCI overlap ratio and 100% or more NTSC.
본 발명은 Nd계 화합물 및 산화물, Nb계 화합물 및 화합물, Co계 화합물 및 산화물로 이루어진 군으로부터 선택되는 보라색의 20nm 이하의 입자를 수열처리하여 포함하는 액상 흡광제를 제조하는 단계; The present invention comprises the steps of preparing a liquid light absorbing agent comprising hydrothermal treatment of purple particles of 20 nm or less selected from the group consisting of Nd-based compounds and oxides, Nb-based compounds and compounds, Co-based compounds, and oxides;
상기 액상 흡광제를 그린 또는 레드 형광체와 균일하게 혼합하는 단계;및Uniformly mixing the liquid light absorber with a green or red phosphor; And
상기 흡광제와 형광체의 혼합물을 80~300℃에서 건조하여 균일하게 코팅하는 단계;를 포함하는 고색재현성 형광체를 제조하는 것을 특징으로 한다.And uniformly coating the mixture of the light absorbing agent and the phosphor by drying at 80 to 300° C., and producing a phosphor having a high color reproducibility.
본 발명에서는 노란색 흡광제(Yellow light absorption materials)를 그린 또는 레드 형광체에 코팅하여 사용할 경우 DCI 중첩비 100% 달성이나 NTSC 100%이상의 색재현율을 나타내는 형광체를 제조하는 것을 특징으로 한다.In the present invention, when a yellow light absorption material is coated on a green or red phosphor, a DCI overlap ratio of 100% is achieved, but a phosphor exhibiting a color reproduction rate of 100% or more of NTSC is manufactured.
본 발명은 노란색의 보색인 퍼플 컬러를 가진 20nm 이하의 산화물 및 초산염등을 이용하여 그린 또는 레드 형광체에 코팅하여, 노란색 광만 선택적으로 흡수시켜서 색재현성을 높인 것을 특징으로 한다.The present invention is characterized in that the color reproducibility is enhanced by selectively absorbing only yellow light by coating on a green or red phosphor using an oxide and acetate of 20 nm or less having a purple color, which is a complementary color of yellow.
상기 코팅물질은 Nd계 화합물 및 산화물, Nb계 화합물 및 화합물, Co계 화합물 및 산화물의 0.1~50nm 의 입자를 사용한다. 만일 입자 크기가 50nm 를 초과할 클 경우에는 휘도를 저하시키는 문제점이 있다.As the coating material, particles of 0.1 to 50 nm of Nd-based compounds and oxides, Nb-based compounds and compounds, Co-based compounds and oxides are used. If the particle size exceeds 50 nm, there is a problem of lowering the luminance.
또한 상기 코팅 물질의 코팅 함량은 형광체 100중량 대비 1~100 중량%를 사용하며, 코팅 물질 함량이 상기 범위보다 적으면 특성 파장 광흡수가 미비하고, 많으면 휘도를 저하시킨다.In addition, the coating content of the coating material is 1 to 100% by weight relative to 100 weight of the phosphor, and when the content of the coating material is less than the above range, the characteristic wavelength light absorption is insufficient, and when the content of the coating material is higher, the luminance is lowered.
코팅 방법은 액상 흡광제 사용하여 형광체와 균일하게 혼합하고 80~300℃ 에서 건조하는 것을 특징으로 한다. 이때, 건조 온도가 80℃ 미만이면 수분이나 용제가 존재하여 형광 특성을 감소시키고, 건조 온도가 300℃ 보다 높으면 형광체 열화로 형광 특성을 감소시킨다.The coating method is characterized in that it is uniformly mixed with a phosphor using a liquid light absorbing agent and dried at 80 to 300°C. At this time, when the drying temperature is less than 80°C, moisture or solvent is present to reduce the fluorescence characteristics, and when the drying temperature is higher than 300°C, the fluorescence characteristics are reduced due to deterioration of the phosphor.
그린 형광체는 Nitride계, Silicate계를 사용하며, 레드 형광체는 KSF, Sulfide계를 사용하는 것을 특징으로 한다.The green phosphor is characterized by using Nitride-based and Silicate-based, and the red phosphor is using KSF or Sulfide-based.
본 발명에 따른 형광체의 광 흡수 영역은 560~600nm 의 옐로우 광을 흡수하는 것을 특징으로 한다.The light absorption region of the phosphor according to the present invention is characterized by absorbing yellow light of 560 to 600 nm.
또한 본 발명의 형광체는 DCI 중첩비 100% 및 NTSC 100% 이상의 색재현율을 나타내는 것을 특징으로 하는 고색재현성 형광체이다.In addition, the phosphor of the present invention is a high color reproducibility phosphor, characterized in that it exhibits a DCI overlap ratio of 100% and a color reproducibility of 100% or more NTSC.
본 발명의 또 다른 측면은 상기 고색재현성 형광체를 포함하는 LED 를 제조하는 것을 특징으로 한다.Another aspect of the present invention is characterized in that to manufacture an LED including the high color reproducibility phosphor.
본 발명에 따르면 20nm 이하의 미세입자를 사용하여, 많은 양을 사용하더라도 휘도 저하를 최소화할 수 있다.According to the present invention, fine particles of 20 nm or less are used, and even if a large amount is used, a decrease in luminance can be minimized.
또한 본 발명의 형광체는 560~600nm대의 불필요한 광을 흡수하여 고색재현이 가능하다.In addition, the phosphor of the present invention is capable of high color reproduction by absorbing unnecessary light in the 560 ~ 600 nm range.
또한 본 발명의 형광체는 NTSC 100% 이상의 색재현율 및 DTI 중첩비 100% 가능하다. In addition, the phosphor of the present invention is capable of NTSC 100% or higher color reproduction and 100% DTI overlap ratio.
또한 본 발명의 형광체는 신뢰성이 향상되며 광특성 유지가 가능한 효과가 있어서, 형광특성이 우수한 발광장치를 제조할 수 있다.Further, since the phosphor of the present invention has an effect of improving reliability and maintaining optical properties, a light emitting device having excellent fluorescence properties can be manufactured.
도 1 및 도 2는 본 발명의 흡광체의 광 특성 평가 결과를 나타낸 그래프이다.1 and 2 are graphs showing the optical property evaluation results of the light absorber of the present invention.
본 발명에서는 노란색 흡광제(Yellow light absorption materials)를 그린 또는 레드 형광체에 코팅하여 사용할 경우 DCI 중첩비 100% 달성 및 NTSC 100%이상의 색재현율을 나타낼 수 있다.In the present invention, when a yellow light absorption material is coated on a green or red phosphor and used, a DCI overlap ratio of 100% can be achieved and a color reproducibility of NTSC 100% or higher can be achieved.
본 발명은 노란색의 보색인 퍼플 컬러를 가진 20nm 이하의 산화물 및 초산염 등을 이용하여 그린 또는 레드 형광체에 코팅하여 노란색 광만 선택적으로 흡수시켜 색재현성을 높인 것을 특징으로 한다.The present invention is characterized in that the color reproducibility is enhanced by selectively absorbing only yellow light by coating on a green or red phosphor using oxides and acetates of 20 nm or less having a purple color that is a complementary color of yellow.
1. 코팅물질1. Coating material
Nd계 화합물 및 산화물(가장 우수), Nb계 화합물 및 화합물, Co계 화합물 및 산화물, 0.1~50nm 입자를 사용하였다. 입자가 상기 크기보다 클 경우 휘도를 저하시킨다.Nd-based compounds and oxides (the best), Nb-based compounds and compounds, Co-based compounds and oxides, and 0.1-50 nm particles were used. When the particles are larger than the size, the brightness is lowered.
2. 코팅물질의 함량2. Content of coating material
코팅물질의 함량은 형광체 100중량 대비 1~100 중량% 를 사용하였다.The content of the coating material was 1 to 100% by weight based on 100% by weight of the phosphor.
코팅물질의 함량이 상기 범위보다 적으면 특정 파장의 광흡수가 미비하고, 코팅물질의 함량이 많으면 휘도를 저하시킨다.When the content of the coating material is less than the above range, light absorption of a specific wavelength is insufficient, and when the content of the coating material is large, the luminance decreases.
3. 코팅 방법3. Coating method
액상 흡광제를 사용하여 형광체와 균일하게 혼합하고 80~300℃에서 건조시켰다. 이때 건조 온도가 80℃ 보다 낮으면 수분이나 용제가 존재하여 형광 특성이 감소되고, 건조 온도가 300℃보다 높으면 형광체 열화로 형광 특성 감소하게 된다.Using a liquid absorbing agent, it was uniformly mixed with the phosphor and dried at 80-300°C. At this time, if the drying temperature is lower than 80°C, moisture or solvent is present and the fluorescence characteristics are reduced. If the drying temperature is higher than 300°C, the fluorescence characteristics decrease due to deterioration of the phosphor.
본 발명에서는 그린 형광체로 Nitride계, Silicate계를 사용하였으며, 레드 형광체로 KSF, Sulfide계를 사용하였다.In the present invention, Nitride-based and Silicate-based green phosphors were used, and KSF and Sulfide-based red phosphors were used.
4. 흡수 영역 4. Absorption area
본 발명의 광흡수 물질이 코팅된 형광체는 560~600nm 의 열로우 광을 흡수하였다.The phosphor coated with the light-absorbing material of the present invention absorbed hot low light of 560 to 600 nm.
5. 흡광제(Light absorption coating materials)의 함량에 따라 파장 흡수가 다르다.5. Wavelength absorption is different depending on the content of light absorption coating materials.
이하에서는 구체적인 실시예를 통하여 본 발명을 보다 상세하게 설명한다.Hereinafter, the present invention will be described in more detail through specific examples.
실시예Example 1. One. 고투명High transparency NdNd 22 OO 33 Sol 제조 Sol manufacturing
Nd-Acetate + Acetic acid + pure water 혼합액을 수열(Hydro thermal, 120 ~ 250℃)처리하여 보라색의 10nm이하의 고투명 Nd2O3 Sol 을 제조하였다.A mixture of Nd-Acetate + Acetic acid + pure water was treated with hydrothermal (120 ~ 250°C) to prepare a purple, high-transparent Nd 2 O 3 Sol having a size of 10 nm or less.
실시예Example 2. 코팅 및 건조 2. Coating and drying
고투명 Nd2O3 Sol과 형광체를 함량별로 균일 혼합 후 증발기를 이용하여 H2O 를 제거하면서 80~300℃ 에서 균일 코팅 건조하였다.After uniformly mixing the high-transparent Nd 2 O 3 Sol and phosphor for each content, the H 2 O was removed using an evaporator, and the coating was uniformly dried at 80-300°C.
도 1 및 도 2에서는 광 특성 평가 결과를 나타내었다.1 and 2 show the results of optical property evaluation.
본 발명에 따라 제조된 형광체 및 LED 디스플레이는 560~600nm 대의 불필요한 광을 흡수하여 고색재현이 가능하고, NTSC 100%이상의 색재현율 및 DTI 중첩비 100% 가능함을 알 수 있다.It can be seen that the phosphor and LED display manufactured according to the present invention absorbs unnecessary light in the range of 560 to 600 nm to enable high-color reproduction, a color reproduction ratio of 100% or more for NTSC and 100% of a DTI overlap ratio.
Claims (7)
상기 그린 형광체는 Nitride계, 또는 Silicate계이며, 레드 형광체는 KSF, 또는 Sulfide계인 것을 특징으로 하며, 상기 코팅된 노란색 흡광제의 함량은 형광체 100중량 대비 1~100 중량%인 것을 특징으로 하는 고색재현성 형광체.It is a high color reproducibility phosphor showing a color reproducibility of 100% DCI overlap ratio and 100% NTSC or higher by coating a purple Nd-based oxide and acetate with a particle diameter of 0.1-50nm, which is a yellow light absorber, on a green or red phosphor.
The green phosphor is Nitride-based or Silicate-based, and the red phosphor is KSF or Sulfide-based, and the content of the coated yellow light absorbing agent is 1 to 100% by weight compared to 100% by weight of the phosphor. Phosphor.
상기 액상 흡광제를 Nitride계, 또는 Silicate계의 그린 형광체, 또는 KSF, 또는 Sulfide계의 레드 형광체와 균일하게 혼합하는 단계; 및
상기 흡광제와 형광체의 혼합물을 80~300℃에서 건조하여, 상기 흡광제를 형광체 100중량 대비 1~100 중량%가 되도록 형광체에 균일하게 코팅하는 단계;를 포함하는 DCI 중첩비 100% 및 NTSC 100% 이상의 색재현율을 나타내는 고색재현성 형광체의 제조방법.Preparing a liquid light absorbing agent by hydrothermal treatment of purple Nd-based oxide particles of 0.1 to 50 nm and acetate at 120 to 250°C;
Uniformly mixing the liquid light absorbing agent with a Nitride-based or Silicate-based green phosphor, or KSF or a Sulfide-based red phosphor; And
Drying the mixture of the light absorbing agent and the phosphor at 80 to 300° C., uniformly coating the light absorbing agent on the phosphor so that it is 1 to 100% by weight relative to 100% by weight of the phosphor; DCI overlap ratio 100% and NTSC 100 A method of manufacturing a high color reproducibility phosphor exhibiting a color reproducibility of% or more.
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