Patents by Inventor Jang-Hyuk Kwon
Jang-Hyuk Kwon 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: 20100176380Abstract: The present invention relates to an organic photoelectric device and a material used therein. The organic photoelectric device includes a substrate, an anode disposed on the substrate, a hole transport layer (HTL) disposed on the anode, an emission layer disposed on the hole transport layer (HTL), and a cathode disposed on the emission layer. The emission layer is characterized in that it includes a host and a phosphorescent dopant, and the host has a difference between the reduction potential or oxidation potential of the host and the reduction potential or oxidation potential of the phosphorescent dopant of less than 0.5 eV. The organic photoelectric device according to the present invention is capable of accomplishing higher efficiency and a lower driving voltage than those of the conventional organic photoelectric device, and has a simplified structure resulting in saving of manufacturing cost.Type: ApplicationFiled: May 30, 2008Publication date: July 15, 2010Inventors: Ho Kuk Jung, Eui Su Kang, Myeong Soon Kang, Jin Seong Park, Eun Sun Yu, Dal Ho Huh, Mi Young Chae, Jang Hyuk Kwon, Jin Jang, Tae Jin Park, Woo Sik Jeon
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Patent number: 7733019Abstract: A flat panel display device. The device includes a plurality of self-luminant devices, each of which includes at least a light emitting layer, formed on every pixel, and a lens sheet having a plurality of condensing lenses that correspond to the self-luminant devices and direct the light emitted from the self-luminant devices toward a predetermined direction. A distance between the light emitting layer and an exterior portion of the condensing lens in the direction of propagation of the light is between 50 and 500 microns so as not to overlap images of neighboring sub-pixels, that are expanded by the condensing lenses. Therefore, a lowering of image sharpness that is caused by the condensing lenses can be prevented, while a light coupling efficiency and a brightness are improved.Type: GrantFiled: April 1, 2005Date of Patent: June 8, 2010Assignee: Samsung Mobile Display Co., Ltd.Inventors: Seung-Yong Song, Jang-Hyuk Kwon, Jin-Woo Park, Dong-Soo Choi, Min-Gyu Lee
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Patent number: 7705534Abstract: A display device includes an underlying layer formed over a substrate; an insulating layer formed over the substrate to expose the underlying layer; and an organic EL layer formed on the exposed portion of the underlying layer, wherein a thickness of the insulating layer is formed to a predetermined thickness to prevent defects in the organic EL layer that can occur in an edge portion of the exposed portion.Type: GrantFiled: December 15, 2004Date of Patent: April 27, 2010Assignee: Samsung Mobile Display Co., Ltd.Inventors: Jun-Yeob Lee, Tae-Min Kang, Jang-Hyuk Kwon, Seong-Taek Lee, Jun-Hyo Chung, Eung-Jin Kim
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Patent number: 7696689Abstract: A display device includes an underlying layer formed over a substrate; an insulating layer formed over the substrate to expose the underlying layer; and an organic EL layer formed on the exposed portion of the underlying layer, wherein a thickness of the insulating layer is formed to a predetermined thickness to prevent defects in the organic EL layer that can occur in an edge portion of the exposed portion.Type: GrantFiled: July 7, 2005Date of Patent: April 13, 2010Assignee: Samsung Mobile Display Co., Ltd.Inventors: Jun-Yeob Lee, Tae-Min Kang, Jang-Hyuk Kwon, Seong-Taek Lee, Jun-Hyo Chung, Eung-Jin Kim
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Patent number: 7651790Abstract: An organic light-emitting device is provided that includes an emission layer containing a phosphorescent dopant and a bipolar phosphorescent host interposed between a first electrode and a second electrode. The bipolar phosphorescent host is a compound represented by formula 1: A—C—B??(1) where A is a hole transport unit, B is an electron transport unit, and C is a bond or a linking group. The bipolar compound can transport both holes and electrons. The organic light-emitting device has high efficiency and a long lifetime.Type: GrantFiled: November 4, 2005Date of Patent: January 26, 2010Assignee: Samsung Mobile Display Co., Ltd.Inventors: Jun-Yeob Lee, Jang-Hyuk Kwon, Min-Seung Chun, Yong-Joong Choi
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Publication number: 20100012926Abstract: An organic EL device is constructed with a first electrode, a light-emitting layer, a second electrode, and an organic layer which includes a biphenylenediamine compound and is interposed between the first electrode and the light-emitting layer. The organic layer formed between the first electrode and the light-emitting layer has both hole transport and hole injection properties. With this structure, the organic EL device has improved lifetime characteristics in spite of absence of a hole injection layer. A buffer layer including an organic compound with p-type semiconductive property may be further formed between the first electrode and the organic layer including the 4,4?-biphenylenediamine compound to facilitate hole injection from the first electrode and transport an injected hole to the light-emitting layer. Therefore, the organic EL device can have a lower driving voltage, thereby improving a device lifetime.Type: ApplicationFiled: May 10, 2005Publication date: January 21, 2010Inventors: Jun-Yeob Lee, Jang-Hyuk Kwon, Min-Seung Chun, Yong-Joong Choi
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Publication number: 20100006831Abstract: The present invention is directed to a full color organic electroluminescent device which comprises a substrate; a first electrode formed on the substrate; an organic emitting layer formed on the first electrode, and having a red-emitting layer, a green-emitting layer and a blue-emitting layer, respectively patterned in a red pixel region, a green pixel region and a blue pixel region, and having the red and green-emitting layer consisting of a phosphorescent material and the blue-emitting layer consisting of a fluorescent material; a hole blocking layer formed on the organic emitting layer as a common layer; and a second electrode formed on the hole blocking layer, so that the full color organic electroluminescent device having enhanced lifetime and luminous efficiency characteristics can be provided.Type: ApplicationFiled: September 14, 2009Publication date: January 14, 2010Inventors: Sang-Hyun Ju, Mu-Hyun Kim, Jang-Hyuk Kwon, Sung-Chul Kim, Ho-Kyoon Chung, Byung-Doo Chin, Seong-Taek Lee
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Patent number: 7629739Abstract: The present invention provides an organic electroluminescent display device and a method of preparing the same. The organic electroluminescent display device may include a first electrode formed on a substrate. A second electrode may be formed so as to be insulated from the first electrode. One or more organic layers may be interposed between the first electrode and the second electrode and include at least an emission layer. One layer or a plurality of layers may be formed on the second electrode and comprise a material or materials having a refractive index higher than a refractive index used to form a material that comprise the second electrode. An organic electroluminescent display device fabricated in this matter has improved efficiency of light extraction. Such a device also resists infiltration of moisture and oxygen to a luminous part of the device that includes the first electrode, the second electrode, and the organic layer.Type: GrantFiled: June 7, 2005Date of Patent: December 8, 2009Assignee: Samsung Mobile Display Co., Ltd.Inventors: Dong-Won Han, Kwan-Hee Lee, Jang-Hyuk Kwon
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Publication number: 20090295284Abstract: The invention is directed to an organic electroluminescent (EL) display device having an improved light extracting efficiency due to a photonic crystal layer formed proximate one side of a stack. Among other elements, the stack may include a first electrode formed on a substrate, an organic light emitting layer formed above the first electrode, and a second electrode formed above the organic light emitting layer. Additionally, the photonic crystal layer may be configured to correspond to a wavelength of colored light. An organic EL display device having an improved light extracting efficiency may be manufactured using a thermal transfer donor film to adhere the photonic crystal layer to the stack.Type: ApplicationFiled: August 5, 2009Publication date: December 3, 2009Applicant: Samsung Mobile Display Co., Ltd.Inventors: Jin-Woo Park, Ho-Kyoon Chung, Jang-Hyuk Kwon, Mu-Hyun Kim, Seung-Yong Song, Young-Rag Do, Yoon-Chang Kim, Tao-Min Kang, Seong-Taek Lee
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Publication number: 20090296757Abstract: A manufacturing method of an active matrix organic light emitting diode (AMOLED) display and an apparatus for manufacturing the AMOLED display, where the display has improved surface flatness and thickness uniformity as well as an improved image quality at edge regions of a pattern. According to the exemplary embodiment of the present invention, an anode electrode is formed on a lower structure of a substrate, an organic layer is formed on the anode electrode by imaging a complex laser beam on a donor film disposed on the substrate having light emitting materials, the complex laser beam having energy distribution inclination over 2%/?m at a threshold energy. The donor film is removed, and a cathode electrode is formed on the organic layer.Type: ApplicationFiled: August 6, 2009Publication date: December 3, 2009Applicant: Samsung Mobile Display Co., Ltd.Inventors: Seong-Taek Lee, Jang Hyuk Kwon, Tae Min Kang, Joon Young Park
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Publication number: 20090291237Abstract: The invention is directed to an organic electroluminescent (EL) display device having an improved light extracting efficiency due to a photonic crystal layer formed proximate one side of a stack. Among other elements, the stack may include a first electrode formed on a substrate, an organic light emitting layer formed above the first electrode, and a second electrode formed above the organic light emitting layer. Additionally, the photonic crystal layer may be configured to correspond to a wavelength of colored light. An organic EL display device having an improved light extracting efficiency may be manufactured using a thermal transfer donor film to adhere the photonic crystal layer to the stack.Type: ApplicationFiled: August 5, 2009Publication date: November 26, 2009Applicant: Samsung Mobile Display Co., Ltd.Inventors: Jin-Woo Park, Ho-Kyoon Chung, Jang-Hyuk Kwon, Mu-Hyun Kim, Seung-Yong Song, Young-Rag Do, Yoon-Chang Kim, Tae-Min Kang, Seong-Taek Lee
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Publication number: 20090238999Abstract: An organic electroluminescent display device and a method of preparing the same are provided. The organic electroluminescent display device may include a first electrode formed on a substrate. A second electrode may be formed so as to be insulated from the first electrode. One or more organic layers may be interposed between the first electrode and the second electrode and include at least an emission layer. A protective layer may be formed so as to cover the second electrode. The protective layer may have a surface roughness (rms) of about 5 ? to about 50 ?. The organic electroluminescent display device including a protective layer having a low surface roughness may benefit from superior lifespan characteristics.Type: ApplicationFiled: May 1, 2009Publication date: September 24, 2009Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.Inventors: Dong-Won HAN, Jin-Woo PARK, Jang-Hyuk KWON
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Patent number: 7589461Abstract: The invention is directed to an organic electroluminescent (EL) display device having an improved light extracting efficiency due to a photonic crystal layer formed proximate one side of a stack. Among other elements, the stack may include a first electrode formed on a substrate, an organic light emitting layer formed above the first electrode, and a second electrode formed above the organic light emitting layer. Additionally, the photonic crystal layer may be configured to correspond to a wavelength of colored light. An organic EL display device having an improved light extracting efficiency may be manufactured using a thermal transfer donor film to adhere the photonic crystal layer to the stack.Type: GrantFiled: November 19, 2004Date of Patent: September 15, 2009Assignee: Samsung Mobile Display Co., Ltd.Inventors: Jin-Woo Park, Ho-Kyoon Chung, Jang-Hyuk Kwon, Mu-Hyun Kim, Seung-Yong Song, Young-Rag Do, Yoon-Chang Kim, Tae-Min Kang, Seong-Taek Lee
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Patent number: 7588795Abstract: A manufacturing method of an active matrix organic light emitting diode (AMOLED) display and an apparatus for manufacturing the AMOLED display, where the display has improved surface flatness and thickness uniformity as well as an improved image quality at edge regions of a pattern. According to the exemplary embodiment of the present invention, an anode electrode is formed on a lower structure of a substrate, an organic layer is formed on the anode electrode by imaging a complex laser beam on a donor film disposed on the substrate having light emitting materials, the complex laser beam having energy distribution inclination over 2%/?m at a threshold energy. The donor film is removed, and a cathode electrode is formed on the organic layer.Type: GrantFiled: August 26, 2005Date of Patent: September 15, 2009Assignee: Samsung Mobile Display Co., Ltd.Inventors: Seong Taek Lee, Jang Hyuk Kwon, Tae Min Kang, Joon Young Park
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Publication number: 20090195153Abstract: An organic electroluminescent display device improves driving characteristics at a high temperature and storage characteristics of the organic electroluminescent display device, and prevents pixel contraction phenomena of the device by providing an organic electroluminescent display device comprising a substrate, a first electrode and a second electrode formed on the substrate, and an organic film layer comprising at least one emitting layer between the first electrode and the second electrode. The emitting layer includes at least one phosphorescent dopant, and the dopant is represented by L3M or L2ML?, wherein the M is a transition metal selected from the group consisting of Ir, Pt, Zn and Os, the L and L? are bidendate ligands coordinated with carbon and nitrogen, and at least one of the L and L? has 15 or more carbon atoms in the ligand.Type: ApplicationFiled: March 17, 2009Publication date: August 6, 2009Applicant: Samsung Mobile DisplayInventors: Jun-Yeob Lee, Yong-Joong Choi, Jang-Hyuk Kwon, Ho-Kyoon Chung
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Patent number: 7563477Abstract: In a method for fabricating an organic electroluminescent display, a first electrode layer is formed on a transparent substrate, and a hole transport layer is formed on the first electrode layer. After an organic luminescent layer is formed on the hole transport layer by scanning a donor film disposed on the substrate using a laser beam, the donor film is removed and then a second electrode is formed on the organic luminescent layer. The laser beam dithers while performing the scanning operation to make the energy distribution uniform.Type: GrantFiled: June 7, 2005Date of Patent: July 21, 2009Assignee: Samsung Mobile Display Co., Ltd.Inventors: Seong Taek Lee, Jang Hyuk Kwon, Tae Min Kang, Joon Young Park
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Patent number: 7544972Abstract: An organic electroluminescent display device and a method of preparing the same are provided. The organic electroluminescent display device may include a first electrode formed on a substrate. A second electrode may be formed so as to be insulated from the first electrode. One or more organic layers may be interposed between the first electrode and the second electrode and include at least an emission layer. A protective layer may be formed so as to cover the second electrode. The protective layer may have a surface roughness (rms) of about 5 ? to about 50 ?. The organic electroluminescent display device including a protective layer having a low surface roughness may benefit from superior lifespan characteristics.Type: GrantFiled: June 10, 2005Date of Patent: June 9, 2009Assignee: Samsung Mobile Display Co., Ltd.Inventors: Dong-Won Han, Jin-Woo Park, Jang-Hyuk Kwon
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Patent number: 7521130Abstract: An organic electroluminescent display device improves driving characteristics at a high temperature and storage characteristics of the organic electroluminescent display device, and prevents pixel contraction phenomena of the device by providing an organic electroluminescent display device comprising a substrate, a first electrode and a second electrode formed on the substrate, and an organic film layer comprising at least one emitting layer between the first electrode and the second electrode. The emitting layer includes at least one phosphorescent dopant, and the dopant is represented by L3M or L2ML?, wherein the M is a transition metal selected from the group consisting of Ir, Pt, Zn and Os, the L and L? are bidendate ligands coordinated with carbon and nitrogen, and at least one of the L and L? has 15 or more carbon atoms in the ligand.Type: GrantFiled: April 21, 2004Date of Patent: April 21, 2009Assignee: Samsung Mobile Display Co., Ltd.Inventors: Jun-Yeob Lee, Yong-Joong Choi, Jang-Hyuk Kwon, Ho-Kyoon Chung
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Patent number: 7482066Abstract: A light-emitting polymer composition for a light-emitting layer in an organic EL display device includes at least first and second light-emitting polymers having different interfacial characteristics which lower a cohesion between elements of the first and second light-emitting polymers.Type: GrantFiled: June 17, 2002Date of Patent: January 27, 2009Assignee: Samsung Mobile Display Co., Ltd.Inventors: Mu-Hyun Kim, Jang-Hyuk Kwon, Min-Chul Suh
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Patent number: 7470933Abstract: An organic light emitting display device may include: a substrate having first, second and third pixel regions. A first electrode layer may be formed in each of the first, second and third pixel regions on the substrate. A hole injection layer may be formed over an entire surface of the substrate on the first electrode layers. A first hole transport layer may be formed on the first electrode layers in the first, second and third pixel region. A second hole transport layer may be formed on the first hole transport layer in any two adjacent pixel regions among the first, second and third pixel regions. A third hole transport layer may be formed on the second hole transport layer in any one of the two adjacent pixel region. A first, second and third organic emission layers may be formed on the first, second and third hole transport layer. A second electrode layer may be formed on the first, second and third organic emission layers.Type: GrantFiled: June 10, 2005Date of Patent: December 30, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Kwan-Hee Lee, Jang-Hyuk Kwon, Seoung-Yoon Ryu