Patents by Inventor Choong Keun Yoo
Choong Keun Yoo 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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Patent number: 7282749Abstract: An organic electroluminescent device includes: first and second substrates facing each other and spaced apart from each other, the first and second substrates having a central portion and a peripheral portion; an array layer on the first substrate, the array layer including a thin film transistor; an organic electroluminescent diode on the second substrate; a connection pattern between the first and second substrates, the connection pattern electrically connecting the thin film transistor and the organic electroluminescent diode; and a seal pattern in the peripheral portion, the seal pattern including a metallic material for attaching the first and second substrates.Type: GrantFiled: December 23, 2004Date of Patent: October 16, 2007Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae-Yong Park, Choong-Keun Yoo
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Patent number: 7279715Abstract: An organic electroluminescent device includes first and second substrates attached by a seal pattern, array elements including a plurality of thin film transistors formed on the first substrate, a first electrode formed on a rear surface of the second substrate, a plurality of electrode separators formed on the rear surface of the first electrode, wherein the plurality of electrode separators is made of an insulating material defining sub-pixel regions that correspond to each thin film transistor, an organic electroluminescent layer formed on a rear surface of the first electrode in each of the sub-pixel regions, a second electrode formed on a rear surface of the organic electroluminescent layer in each of sub-pixel regions, a conductive connector formed between the first and second substrates in each sub-pixel region for connecting to the second electrode of a sub-pixel region.Type: GrantFiled: January 5, 2005Date of Patent: October 9, 2007Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae Yong Park, Ock Hee Kim, Choong Keun Yoo, Nam Yang Lee, Kwan Soo Kim
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Patent number: 7258589Abstract: An organic electroluminescent device includes first and second substrates attached by a seal pattern, array elements having a plurality of switching devices on the first substrate; a color changing medium on a rear surface of the second substrate, wherein the color changing medium has a black matrix that defines sub-pixel regions and has red, green and blue color changing layers respectively corresponding to the sub-pixel regions, a planarizing layer on the color changing medium, a first electrode on a rear surface of the planarizing layer, an organic electroluminescent layer on a rear surface of the first electrode, second electrodes on a rear surface of the organic electroluminescent layer that correspond to respective sub-pixel regions, and a plurality of electrical connectors between the first and second substrates, wherein electrical connectors connect the array elements on the first substrate to the second electrodes on the second substrate, respectively.Type: GrantFiled: January 11, 2006Date of Patent: August 21, 2007Assignee: LG Philips LCD Co., Ltd.Inventors: Jae Yong Park, Choong Keun Yoo, Ock Hee Kim, Nam Yang Lee
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Patent number: 7245080Abstract: An organic electroluminescent device includes first and second substrates facing and spaced apart from each other, the first and second substrates including a pixel region; a gate line on an inner surface of the first substrate; a data line crossing the gate line; a switching thin film transistor connected with the gate line and the data line; a driving thin film transistor connected with the switching thin film transistor; a power line connected with the driving thin film transistor; a first electrode on an inner surface of the second substrate; a first sidewall and a second sidewall on the first electrode at a boundary of the pixel region, the first sidewall and the second sidewall spaced apart from each other; an electroluminescent layer on the first electrode in the pixel region; a second electrode on the electroluminescent layer in the pixel region; and a connection electrode electrically connected to the first and second substrates.Type: GrantFiled: May 9, 2006Date of Patent: July 17, 2007Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae-Yoon Lee, Kyung-Man Kim, Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim
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Patent number: 7196465Abstract: A dual panel type organic electroluminescent device includes a first substrate having a first region and a second region corresponding to a peripheral region of the first region, TFTs formed in the first region, pad parts formed in the second region, a second substrate attached to the first substrate with a predetermined space therebetween, the second substrate overlapping the first region and exposing the second region of the first substrate, a first electrode, an organic electroluminescent layer and a second electrode formed on the second substrate facing the first substrate, a first electrical connection pattern connecting the thin film transistor with the second electrode, a second electrical connection pattern connecting one of the pad parts with the first electrode, a seal pattern disposed on edges of the first and second substrates, and a dummy spacer disposed between an image display region of the first region and the seal pattern.Type: GrantFiled: June 30, 2004Date of Patent: March 27, 2007Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae Yong Park, Choong Keun Yoo, Ock Hee Kim
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Publication number: 20070054583Abstract: An organic electroluminescent device and methodology of fabricating the same includes first and second substrates facing and spaced apart from each other, the first and second substrates having a display region and a peripheral region, the display region including a plurality of pixel regions and a dummy pixel region; driving thin film transistors respectively adjacent to each of the plurality of pixel regions on the inner surface of the first substrate; first connection electrodes respectively connected to the driving thin film transistors; a first electrode on an entire inner surface of the second substrate; a sidewall on the first electrode at a boundary of each of the plurality of pixel regions and the dummy pixel region; an organic electroluminescent layer on the first electrode; second electrodes on the organic electroluminescent layer so that a second electrode is present in each of the plurality of pixel regions and the dummy pixel region, respectively, the second electrodes in each of the plurality oType: ApplicationFiled: November 9, 2006Publication date: March 8, 2007Inventors: Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim, Nam-Yang Lee
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Publication number: 20070001594Abstract: An organic electroluminescent display device includes first and second substrates facing and spaced apart from each other. A first electrode resides on the first substrate and a separator having dual-layer, reciprocal L-shaped pattern resides on the first electrode. An organic emitting layer having a first thickness resides on the first electrode in a sub-pixel region and a second electrode resides on the organic emitting layer. An array element layer resides on the second substrate, the array element layer including a thin film transistor. A connection pattern electrically connects the second electrode and the thin film transistor.Type: ApplicationFiled: June 26, 2006Publication date: January 4, 2007Inventors: Choong-Keun Yoo, Tae-Joon Ahn, Jong-Hyun Park
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Patent number: 7132308Abstract: An organic electroluminescent display device includes first and second substrates facing and spaced apart from each other, the first and second substrates having a plurality of sub-pixel regions, a thin film transistor provided at each of the plurality of sub-pixel regions on an inner surface of the first substrate, a first electrode on an inner surface of the second substrate, an organic electroluminescent layer on the first electrode, a second electrode on the organic electroluminescent layer at each of the plurality of sub-pixel regions, and a connection pattern contacting the thin film transistor and the second electrode, wherein a melting temperature of the connection pattern is lower than a melting temperature of the second electrode.Type: GrantFiled: May 3, 2005Date of Patent: November 7, 2006Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim, Nam-Yang Lee, Kwan-Soo Kim
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Patent number: 7132796Abstract: An organic electroluminescent device includes first and second substrates facing and spaced apart from each other, the first and second substrates including a pixel region; a gate line on an inner surface of the first substrate; a data line crossing the gate line; a switching thin film transistor connected with the gate line and the data line; a driving thin film transistor connected with the switching thin film transistor; a power line connected with the driving thin film transistor; a first electrode on an inner surface of the second substrate; a first sidewall and a second sidewall on the first electrode at a boundary of the pixel region, the first sidewall and the second sidewall spaced apart from each other; an electroluminescent layer on the first electrode in the pixel region; a second electrode on the electroluminescent layer in the pixel region; and a connection electrode electrically connected to the first and second substrates.Type: GrantFiled: June 29, 2004Date of Patent: November 7, 2006Assignee: LG.Philips LCD Co., LtdInventors: Jae-Yoon Lee, Kyung-Man Kim, Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim
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Patent number: 7129632Abstract: An organic electroluminescent display device includes a substrate having a plurality of sub-pixel regions for red, green and blue, a driving device on the substrate, a first electrode connected to the driving device, a hole being injected from the first electrode, a second electrode over the first electrode, an electron being injected from the second electrode, and a light emitting material layer interposed between the first and second electrodes, the light emitting material layer of at least one of the plurality of sub-pixel regions includes a phosphorescent material.Type: GrantFiled: August 21, 2002Date of Patent: October 31, 2006Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae-Yong Park, Choong-Keun Yoo, Hee-Suk Pang
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Patent number: 7109650Abstract: An active matrix organic electroluminescent display device includes a substrate including a light emitting region having sub pixel regions, a plurality of switching elements on the substrate in the sub pixel regions, a first passivation layer covering the plurality of switching elements and having a plurality of first contact holes exposing the plurality of switching elements, a plurality of first electrodes on the first passivation layer, each first electrode connected to each switching element through each first contact hole, a second passivation layer on the plurality of first electrodes, the second passivation layer having a plurality of openings exposing the plurality of first electrodes and covering edge portions of the plurality of first electrodes, a plurality of organic electroluminescent layers on the second passivation layer, each organic electroluminescent layer contacting each first electrode through each opening, and a second electrode on the plurality of organic electroluminescent layers, whereType: GrantFiled: June 27, 2003Date of Patent: September 19, 2006Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim, Tae-Joon Ahn
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Publication number: 20060202205Abstract: An organic electroluminescent device includes first and second substrates facing and spaced apart from each other, the first and second substrates including a pixel region; a gate line on an inner surface of the first substrate; a data line crossing the gate line; a switching thin film transistor connected with the gate line and the data line; a driving thin film transistor connected with the switching thin film transistor; a power line connected with the driving thin film transistor; a first electrode on an inner surface of the second substrate; a first sidewall and a second sidewall on the first electrode at a boundary of the pixel region, the first sidewall and the second sidewall spaced apart from each other; an electroluminescent layer on the first electrode in the pixel region; a second electrode on the electroluminescent layer in the pixel region; and a connection electrode electrically connected to the first and second substrates.Type: ApplicationFiled: May 9, 2006Publication date: September 14, 2006Inventors: Jae-Yoon Lee, Kyung-Man Kim, Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim
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Patent number: 7105999Abstract: An organic electroluminescent display device includes first and second substrates facing and spaced apart from each other, the first and second substrates having a plurality of pixel regions and a peripheral region surrounding the plurality of pixel regions, a first pad disposed at the peripheral region on an inner surface of the first substrate, a driving thin film transistor disposed at each of the plurality of pixel regions on the inner surface of the first substrate, the driving thin film transistor including an active layer, a gate electrode, and source and drain electrodes, a first connection electrode structure connected to the drain electrode, a second connection electrode structure connected to the first pad, the second connection electrode structure being the same as the first connection electrode structure, a first electrode on an entire inner surface of the second substrate, the first electrode being connected to the second connection electrode structure, an organic emission layer on the first eleType: GrantFiled: June 30, 2003Date of Patent: September 12, 2006Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim, Nam-Yang Lee, Kwan-Soo Kim
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Patent number: 7102198Abstract: An organic electroluminescent display device includes a first substrate, a second substrate spaced apart and facing the first substrate, a switching thin film transistor disposed on an inner surface of the first substrate, a driving thin film transistor electrically connected to the switching thin film transistor, a connecting electrode electrically connected to the driving thin film transistor, a first electrode disposed on an inner surface of the second substrate, a partition wall disposed on the first electrode and having a transmissive hole corresponding to a pixel region between the first and second substrates, an organic layer disposed within the transmissive hole on the first electrode, and a second electrode disposed on the organic layer, wherein the second electrode is electrically connected to the driving thin film transistor through the connecting electrode.Type: GrantFiled: May 2, 2005Date of Patent: September 5, 2006Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim, Nam-Yang Lee, Kwan-Soo Kim
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Patent number: 7021984Abstract: An organic electroluminescent display device includes a first substrate, a second substrate spaced apart from and facing the first substrate to form a space therebetween, an array element on an inner surface of the first substrate, an organic electroluminescent diode on an inner surface of the second substrate, a seal pattern along a peripheral portion between the first and second substrates, and a connection pattern electrically interconnecting the array element and the organic electroluminescent diode, wherein a pressure within the space between the first and second substrates is lower than an ambient atmospheric pressure.Type: GrantFiled: July 7, 2004Date of Patent: April 4, 2006Assignee: LG. Philips LCD Co., Ltd.Inventors: Jae-Yong Park, Ock-Hee Kim, Choong-Keun Yoo, Nam-Yang Lee, Kwan-Soo Kim
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Publication number: 20060061262Abstract: A dual panel-type organic electroluminescent display device includes a first substrate on which gate and data lines cross each other to define sub-pixels. Array elements are disposed at the sub-pixels on the first substrate. A first electrode is disposed on substantially the entire surface of a second substrate opposing the first substrate. An insulating pattern is disposed on the first electrode, an organic electroluminescent layer is disposed on the first electrode, and a second electrode is disposed on the organic electroluminescent layer at each sub-pixel. A connection pattern connects the array element and the second electrode at each sub-pixel. The connection pattern contacts the second electrode under the insulating pattern.Type: ApplicationFiled: June 21, 2005Publication date: March 23, 2006Inventors: Choong-Keun Yoo, Kwang-Yeon Lee
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Patent number: 7012366Abstract: An organic electroluminescent device includes first and second substrates attached by a seal pattern, array elements having a plurality of switching devices on the first substrate; a color changing medium on a rear surface of the second substrate, wherein the color changing medium has a black matrix that defines sub-pixel regions and has red, green and blue color changing layers respectively corresponding to the sub-pixel regions, a planarizing layer on the color changing medium, a first electrode on a rear surface of the planarizing layer, an organic electroluminescent layer on a rear surface of the first electrode, second electrodes on a rear surface of the organic electroluminescent layer that correspond to respective sub-pixel regions, and a plurality of electrical connectors between the first and second substrates, wherein electrical connectors connect the array elements on the first substrate to the second electrodes on the second substrate, respectively.Type: GrantFiled: December 30, 2002Date of Patent: March 14, 2006Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae Yong Park, Choong Keun Yoo, Ock Hee Kim, Nam Yang Lee
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Patent number: 6967435Abstract: An active matrix organic electroluminescent display device includes a first substrate and a second substrate facing and spaced apart from each other, a thin film transistor on an inner surface of the first substrate, a first electrode connected to the thin film transistor, an organic electroluminescent layer on the first electrode, a second electrode on the organic electroluminescent layer, a passivation layer on the second electrode, a black matrix on an inner surface of the second substrate, the black matrix includes a plurality of open portions, a color filter layer at the plurality of open portions, a color changing layer on the color filter layer, an overcoat layer on the color changing layer, and an adhesive film between the passivation layer and the overcoat layer.Type: GrantFiled: December 27, 2002Date of Patent: November 22, 2005Assignee: LG.Philips LCD Co., Ltd.Inventors: Jae-Yong Park, Choong-Keun Yoo
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Publication number: 20050194589Abstract: An organic electroluminescent display device includes first and second substrates facing and spaced apart from each other, the first and second substrates having a plurality of sub-pixel regions, a thin film transistor provided at each of the plurality of sub-pixel regions on an inner surface of the first substrate, a first electrode on an inner surface of the second substrate, an organic electroluminescent layer on the first electrode, a second electrode on the organic electroluminescent layer at each of the plurality of sub-pixel regions, and a connection pattern contacting the thin film transistor and the second electrode, wherein a melting temperature of the connection pattern is lower than a melting temperature of the second electrode.Type: ApplicationFiled: May 3, 2005Publication date: September 8, 2005Inventors: Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim, Nam-Yang Lee, Kwan-Soo Kim
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Publication number: 20050189872Abstract: An organic electroluminescent display device includes a first substrate, a second substrate spaced apart and facing the first substrate, a switching thin film transistor disposed on an inner surface of the first substrate, a driving thin film transistor electrically connected to the switching thin film transistor, a connecting electrode electrically connected to the driving thin film transistor, a first electrode disposed on an inner surface of the second substrate, a partition wall disposed on the first electrode and having a transmissive hole corresponding to a pixel region between the first and second substrates, an organic layer disposed within the transmissive hole on the first electrode, and a second electrode disposed on the organic layer, wherein the second electrode is electrically connected to the driving thin film transistor through the connecting electrode.Type: ApplicationFiled: May 2, 2005Publication date: September 1, 2005Inventors: Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim, Nam-Yang Lee, Kwan-Soo Kim