Patents by Inventor Seoung-jae Im
Seoung-jae Im has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20100156274Abstract: A halosilicate phosphor represented by Formula 1 p(Ca1-xM1x)O.qM2O2.rM3A2:sM4 wherein M1 includes at least one selected from a group consisting of Sr2+ and Ba2+; M2 includes at least one selected from a group consisting of Si4+ and Ge4+; M3 includes at least one selected from a group consisting of Ca2+, Sr2+ and Ba2+; M4 includes at least one selected from a group consisting of Eu2+, Mn2+, Sb2+, Ce3+, Pr3+, Nd3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+, Yb3+ and Bi3+; A includes at least on selected from a group consisting of F?, Cl?, Br? and I?; and wherein 0?x<1, 1.8?p?2.2, 0.8?q?1.2, 1<r/q<3 and 0<s<0.5.Type: ApplicationFiled: September 9, 2009Publication date: June 24, 2010Applicants: SAMSUNG ELECTRONICS CO., LTD., SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Tae-gon KIM, Shunichi KUBOTA, Young-sic KIM, Seoung-jae IM
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Publication number: 20100019655Abstract: Provided are an alkaline earth metal silicate-based phosphor which is a compound represented by Formula 1 below, and a white light-emitting device (LED) including the same: (M11-x-yAxBy)aMgbM2cOdZe??Formula 1 wherein, M1 is one selected from the group consisting of Ba, Ca, and Sr; M2 is at least one selected from Si or Ge; A and B are each independently one selected from the group consisting of Eu, Ce, Mn, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Bi, Sn, and Sb; Z is at least one selected from the group consisting of a monovalent or divalent element, H, and N; and 0<x<1, 0?y?1, 6.3<a<7.7, 0.9<b<1.1, 3.6<c<4.4, 14.4<d<17.6, 14.4<d+e<17.6, and 0?e?0.18. The alkaline earth metal silicate-based phosphor has a broad excitation wavelength range, and thus, both a UV-LED and a blue LED can be used as excitation sources for white LEDs.Type: ApplicationFiled: October 6, 2009Publication date: January 28, 2010Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Kubota Shunichi, Young-sic KIM, Seoung-jae IM
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Patent number: 7649594Abstract: A photo-luminescent liquid crystal display (PL LCD) includes: a light control unit which includes a liquid crystal (LC) layer modulating the UV light and electrodes driving the LC layer; and a light emitting layer which emits light by the UV light transmitted through the light control unit. The light emitting layer includes inorganic phosphors and semiconductor quantum dots (QDs) having a quantum confinement effect. The PL LCD includes adding QDs having a high quantum efficiency into luminescent substances having lower light utilization efficiency than other colors, for example, red phosphor having very low quantum efficiency to improve the light utilization efficiency, thereby improving the color balance.Type: GrantFiled: April 25, 2006Date of Patent: January 19, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Byung-ki Kim, Seoung-jae Im, Jae-young Choi, Eun-sung Lee, Eun-joo Jang, Jae-hee Cho
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Patent number: 7618556Abstract: Provided are an alkaline earth metal silicate-based phosphor which is a compound represented by Formula 1 below, and a white light-emitting device (LED) including the same. (M11-x-yAxBy)aMgbM2cOdZe??Formula 1 wherein, M1 is one selected from the group consisting of Ba, Ca, and Sr; M2 is at least one selected from Si or Ge; A and B are each independently one selected from the group consisting of Eu, Ce, Mn, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Bi, Sn, and Sb; Z is at least one selected from the group consisting of a monovalent or divalent element, H, and N; and 0<x<1, 0?y?1, 6.3<a<7.7, 0.9<b<1.1, 3.6<c<4.4, 14.4<d<17.6, 14.4<d+e<17.6, and 0?e?0.18. The alkaline earth metal silicate-based phosphor has a broad excitation wavelength range, and thus, both a UV-LED and a blue LED can be used as excitation sources for white LEDs.Type: GrantFiled: March 19, 2007Date of Patent: November 17, 2009Assignee: Samsung Electro-mechanics Co., Ltd.Inventors: Kubota Shunichi, Young-sic Kim, Seoung-jae Im
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Publication number: 20090189122Abstract: Disclosed is a method for preparing an oxide nano phosphor. A metal precursor solution is prepared. The metal precursor solution is impregnated into a porous polymer material. A heat treatment is performed on the porous polymer material having the metal precursor solution impregnated therein. The heat treatment is performed by heating the porous polymer material having the metal precursor impregnated therein up to a temperature of higher than 500° C. solution at a temperature elevating rate of higher than 100° C. per minute.Type: ApplicationFiled: May 29, 2008Publication date: July 30, 2009Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Tae-gon KIM, Dae-ho YOON, Takaki MASAKI, Woo-jung PARK, Mong-Kwon JUNG, Seoung-jae IM
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Publication number: 20090130484Abstract: Disclosed is a silicate phosphor represented by Formula: Lia-xAxSrb-y-z-lByEuzClSic-mDmOd-nEn where A includes at least one ion selected from the group consisting of Na, K, Rb, and Cs. B includes at least one ion selected from the group consisting of Mg, Ca, Ba and Zn. C includes at least one ion selected from the group consisting of Sc, Y, La, Gd, Ce, Pr, Nd, Sm, Tb, Dy, Ho, Er, Tm, Yb, Lu and Bi. D includes at least one ion selected from the group consisting of B, Al, Ga, In and TI. E includes at least one ion selected from the group consisting of F, Cl, Br, and I. Further disclosed is a white light emitting device including the silicate phosphor.Type: ApplicationFiled: June 13, 2008Publication date: May 21, 2009Applicant: Samsung Electro-mechanics Co., Ltd.Inventors: Tae-gon KIM, Seoung-jae IM, Shunichi KUBOTA, Young-sic KIM
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Publication number: 20090114880Abstract: Provided is a phosphate nano phosphor with a mean particle diameter of 100 to 3000 nm. Also provided is a method of preparing a nano phosphor, the method comprising: dissolving two or more species of metal precursor compounds in water, and then adjusting the pH to prepare an aqueous solution of pH 4-10; coprecipitating the aqueous solution by mixing with a phosphate precursor aqueous solution with the pH adjusted to 7-12; and redispersing the particles obtained from the coprecipitation in water or polyol solvent, and then heat treating the particles. The phosphate nano phosphor according to the present invention has superior light emission efficiency compared with conventional nano phosphors.Type: ApplicationFiled: October 31, 2008Publication date: May 7, 2009Applicants: SAMSUNG ELECTRO-MECHANICS CO., LTD., SEOUL NATIONAL UNIVERSITY INDUSTRY FOUNDATIONInventors: Tae-gon KIM, Tae-hyung KIM, Shin-hoo KANG, Seoung-jae IM
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Patent number: 7514020Abstract: Provided is a silicophosphate-based phosphor of Formula 1 and a light-emitting device including the same: [(Sr(1-x-y-a-b-c) BaaCabMgcEuxMny)4Si(PO4)4??(1) where 0<x?0.2, 0?y?0.2, 0?a?0.2, 0?b?0.5, and 0?c?0.5. The silicophosphate-based phosphor of Formula 1 is chemically and thermally stable and can be easily prepared. The phosphor exhibits a high luminous property when excited by a UV LED excitation light source having a wavelength of 360-420 nm, and emits light having a wavelength of 570 to 630 nm. Accordingly, the silicophosphate-based phosphor can be used in a LED, a lamp, a self-emission type liquid crystal display device, or the like. In particular, when a white LED includes the silicophosphate-based phosphor, the color rendering index of the white LED is high and thus an excellent color rendering property can be obtained.Type: GrantFiled: July 6, 2006Date of Patent: April 7, 2009Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Xiaoqing Zeng, Seoung-jae Im, Hyung-kun Kim
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Publication number: 20090075082Abstract: Disclosed herein is a method for preparing a nanophosphor from a metal hydroxy carbonate and a nanophosphor prepared by the method. The method is capable of mass-production of a uniform particle-size nanophosphor with superior dispersibility and enables reduction in preparation costs. The nanophosphor prepared by the disclosed method exhibits high luminescence efficiency.Type: ApplicationFiled: May 1, 2008Publication date: March 19, 2009Applicants: SAMSUNG ELECTRONICS CO., LTD., SAMSUNG CORNING PRECISION GLASS CO., LTD.Inventors: Young Sic KIM, Seoung Jae IM, Kubota SHUNICHI, Jae Ho LEE, Tae Gon KIM, Seok Hyun NAM, Dong Chin LEE
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Publication number: 20090050848Abstract: Disclosed herein are a metal hydroxy carbonate nanoparticle-coated phosphor and a preparation method thereof. The phosphor coated with metal hydroxy carbonate nanoparticles exhibit improved thermal stability and an increased luminance lifespan, when applied to display devices, e.g., PDPs and lamps.Type: ApplicationFiled: May 1, 2008Publication date: February 26, 2009Applicants: SAMSUNG ELECTRONICS CO., LTD., SAMSUNG CORNING PRECISION GLASS CO., LTD.Inventors: Young Sic KIM, Seoung Jae IM, Kubota SHUNICHI, Jae Ho LEE, Tae Gon KIM, Seok Hyun NAM, Dong Chin LEE
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Publication number: 20090051269Abstract: Provided is an (oxy)nitride phosphor, which is a compound represented by Formula 1 below: {M(1-x)Eux}aSibOcNd ??<Formula 1> wherein, M is an alkaline earth metal; and 0<x<1, 1.8<a<2.2, 4.5<b<5.5, 0?c<8, 0<d?8, and 0<c+d?8. The (oxy)nitride phosphor produces red light suitable for use in UV-LED and blue-LED type white light-emitting devices and achieves good efficiency.Type: ApplicationFiled: August 20, 2008Publication date: February 26, 2009Applicant: Samsung Electro-mechanics Co., Ltd.Inventors: Shunichi Kubota, Young-sic Kim, Seoung-jae Im, Tae-gon Kim
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Publication number: 20080239206Abstract: Disclosed is a compound comprising Ba—Sr—Ca obtained by heat treating, under a reducing atmosphere, a starting material which is a blend comprising Ba oxide; Sr oxide; Ca oxide; an oxide of Eu, Mn, Sm, Sn, Sb, Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb, or Bi; Mg oxide; and an oxide of Si or Ge; the blend being mixed together in a molar ratio of x:y:z:(7-x-y-z):a:b, where 0<x<7, 0<y<7, 0<z<7, 0.9<a<1.1 and 3.6<b<4.4, wherein the compound comprising Ba—Sr—Ca provides white luminescence when the compound comprising Ba—Sr—Ca is illuminated by ultraviolet or near-ultraviolet electromagnetic radiation.Type: ApplicationFiled: March 14, 2008Publication date: October 2, 2008Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Kubota SHUNICHI, Young-sic KIM, Tae-gon KIM, Seoung-jae IM
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Publication number: 20080020236Abstract: Provided are an alkaline earth metal silicate-based phosphor which is a compound represented by Formula 1 below, and a white light-emitting device (LED) including the same. (M11-x-yAxBy)aMgbM2cOdZeFormula 1 wherein, M1 is one selected from the group consisting of Ba, Ca, and Sr; M2 is at least one selected from Si or Ge; A and B are each independently one selected from the group consisting of Eu, Ce, Mn, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Bi, Sn, and Sb; Z is at least one selected from the group consisting of a monovalent or divalent element, H, and N; and 0<x<1, 0?y?1, 6.3<a<7.7, 0.9<b<1.1, 3.6<c<4.4, 14.4<d<17.6, 14.4<d+e<17.6, and 0?e?0.18. The alkaline earth metal silicate-based phosphor has a broad excitation wavelength range, and thus, both a UV-LED and a blue LED can be used as excitation sources for white LEDs.Type: ApplicationFiled: March 19, 2007Publication date: January 24, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Kubota Shunichi, Young-sic KIM, Seoung-jae IM
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Publication number: 20070284530Abstract: Provided is a laser display device. The laser display device may include at least one light source configured to emit at least one laser beam, at least one scanning unit configured to perform a scanning with the at least one laser beam, and an image forming unit configured to generate excitation light and scattering light by receiving the at least one laser beam from the scanning unit to form an image.Type: ApplicationFiled: May 15, 2007Publication date: December 13, 2007Inventors: Joong-kon Son, Seoung-jae Im, Ok-hyun Nam
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Publication number: 20070182308Abstract: Provided are a borate chloride phosphor represented by Formula 1 below, a light-emitting diode (LED) including the same, a lamp, a self-emissive liquid crystal display device (LCD), and a plasma display device (PDP). (Ca(1?x?a?b?c)BaaSrbMgcEux)2B6O10.5Cl,Formula 1 where 0<x?0.2, 0?a?0.5, 0?b?0.95, 0?c?0.5. The borate chloride phosphor has good chemical properties and is thermally stable and easy to manufacture. The borate chloride phosphor exhibits high brightness due to a UV excitation light source in a wavelength of 280-410 nm, and emits blue light in a wavelength range of 425-455 nm. Accordingly, the borate chloride phosphor of the present invention can be applied to an LED, a lamp, a PDP, or a self-emissive LCD.Type: ApplicationFiled: December 11, 2006Publication date: August 9, 2007Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Xiaoqing ZENG, Seoung-jae IM, Byung-ki KIM
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Publication number: 20070058107Abstract: A photoluminescent liquid crystal display includes a lower substrate and an upper substrate disposed apart from each other opposite each other, a liquid crystal layer interposed between the lower and upper substrates, a backlight unit disposed under the lower substrate and emitting blue light, a phosphor layer disposed on the upper substrate and excited by the blue light and a color filter layer disposed on the phosphor layer and limiting excitement of the red and green phosphors by ambient light. The phosphor layer includes a red phosphor disposed in a red pixel region and a green phosphor disposed in a green pixel region. The color filter layer includes an R filter disposed on the red phosphor and a green filter disposed on the green phosphor.Type: ApplicationFiled: August 1, 2006Publication date: March 15, 2007Inventors: Seoung-jae Im, Byung-ki Kim, Xiaoqing Zeng, Jae-young Choi
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Publication number: 20070012936Abstract: Provided is a silicophosphate-based phosphor of Formula 1 and a light-emitting device including the same: [(Sr(1-x-y-a-b-c) BaaCabMgcEuxMny)4Si(PO4)4 ??(1) where 0<x?0.2, 0?y?0.2, 0<a?0.2, 0<b?0.5, and 0<c?0.5. The silicophosphate-based phosphor of Formula 1 is chemically and thermally stable and can be easily prepared. The phosphor exhibits a high luminous property when excited by a UV LED excitation light source having a wavelength of 360-420 nm, and emits light having a wavelength of 570 to 630 nm. Accordingly, the silicophosphate-based phosphor can be used in a LED, a lamp, a self-emission type liquid crystal display device, or the like. In particular, when a white LED includes the silicophosphate-based phosphor, the color rendering index of the white LED is high and thus an excellent color rendering property can be obtained.Type: ApplicationFiled: July 6, 2006Publication date: January 18, 2007Inventors: Xiaoqing Zeng, Seoung-jae Im, Hyung-kun Kim
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Publication number: 20070007881Abstract: A photo-luminescent liquid crystal display (PL LCD) includes: a light control unit which includes a liquid crystal (LC) layer modulating the UV light and electrodes driving the LC layer; and a light emitting layer which emits light by the UV light transmitted through the light control unit. The light emitting layer includes inorganic phosphors and semiconductor quantum dots (QDs) having a quantum confinement effect. The PL LCD includes adding QDs having a high quantum efficiency into luminescent substances having lower light utilization efficiency than other colors, for example, red phosphor having very low quantum efficiency to improve the light utilization efficiency, thereby improving the color balance.Type: ApplicationFiled: April 25, 2006Publication date: January 11, 2007Inventors: Byung-ki Kim, Seoung-jae Im, Jae-young Choi, Eun-sung Lee, Eun-joo Jang, Jae-hee Cho
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Publication number: 20060274226Abstract: A photo-luminescent (PL) liquid crystal display (LCD) including a blue dichroic mirror layer disposed under a light emitting layer is provided. Visible light generated from the light emitting layer is mostly reflected to the front side of the PL LCD, thereby increasing the light utilization efficiency thereof. A blue PL quantum dot layer is formed in blue light regions, thereby improving a narrow viewing angle and an orientation in blue pixels. An ultraviolet (UV) filter blocking UV light in the ambient light is formed to protect the light emitting layer from the excitation caused by external light, thereby preventing degradation of contrast caused by an undesired light emission.Type: ApplicationFiled: June 1, 2006Publication date: December 7, 2006Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seoung-jae Im, Byung-ki Kim, Jae-young Choi
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Publication number: 20060244367Abstract: A photoluminescent liquid crystal display (PL-LCD) includes: a front plate and a rear plate; liquid crystals disposed between the front and rear plates; an electrode that is disposed on an inner surface of each of the front and rear plates and forms an electric field in the liquid crystals; an emitting layer that is formed on the front plate and emits visible light by being excited by light having a wavelength of about 390 nm to about 410 nm; a light source unit that is formed on a rear side of the rear plate and includes a lamp emitting near blue-UV light having a wavelength of about 390 nm to about 410 nm toward the emitting layer; and a UV filter blocking UV rays in ambient light from entering a front side of the front plate.Type: ApplicationFiled: April 27, 2006Publication date: November 2, 2006Inventors: Seoung-jae Im, Byung-ki Kim, Jae-young Choi, In-sun Hwang, Hae-il Park