Patents by Inventor Chae-Hyun Lee
Chae-Hyun Lee 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: 20240136467Abstract: A lighting apparatus includes a light emitting diode, in which the light emitting diode includes an n-type nitride semiconductor layer, an active layer located on the n-type nitride semiconductor layer, and a p-type nitride semiconductor layer located on the active layer. The light emitting diode emits light that varies from yellow light to white light depending on a driving current.Type: ApplicationFiled: December 6, 2023Publication date: April 25, 2024Applicant: SEOUL VIOSYS CO., LTD.Inventors: Yong Hyun BAEK, Ji Hun KANG, Chae Hon KIM, Ji Hoon PARK, So Ra LEE
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Patent number: 10402427Abstract: Disclosed are a system and a method for analyzing a result of clustering massive data. An open-source map/reduce framework named Hadoop is used to calculate a silhouette coefficient corresponding to a significance verification index capable of evaluating a result of clustering massive data. To implement the system and the method for analyzing a result of clustering massive data, clustered data is divided into blocks. For all of the blocks, input splits are generated. Then, the generated input splits are assigned to multiple computers. Each computer stores only data of blocks included in an input split assigned in a memory, and calculates a silhouette coefficient for each record. Each computer provides only the calculated silhouette coefficient to an index coefficient calculation apparatus, and enables the index coefficient calculation apparatus to calculate a silhouette coefficient for a cluster. Therefore, the result of clustering the massive data can be rapidly and objectively analyzed.Type: GrantFiled: October 31, 2012Date of Patent: September 3, 2019Assignee: SK PLANET CO., LTD.Inventors: Chae Hyun Lee, Min Soeng Kim, Jun Sup Lee
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Patent number: 9460113Abstract: According to exemplary embodiments of the invention, a location-based keyword recommending system and method are provided. The location-based keyword recommending system may include a keyword collecting unit to store location information regarding a location where a keyword is input, a region setting unit to set a virtual region by performing clustering of the location information with reference to the keyword, a region combining unit to combine virtual regions overlapping each other into one virtual region, and a keyword recommending unit to provide a location-based keyword based on the keyword related to the location information of the virtual region.Type: GrantFiled: September 23, 2011Date of Patent: October 4, 2016Assignee: NHN CorporationInventors: Byoung Hak Kim, Chae Hyun Lee
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Patent number: 9448999Abstract: A method for detecting similar documents includes extracting an entity from each of a first web document and a second web document; determining an importance contribution element corresponding to each of the web documents; calculating, using the processor, weights for each entity based on the determined importance contribution elements; and determining whether the web documents are similar documents based on the calculated weights. A device to detect similar documents includes a storage device; an entity extractor stored on the storage device and configured to extract an entity from a first web document and a second web document and to determine an importance contribution element from each of the web documents; a weight calculator configured to calculate weights of each entity based on the determined importance contribution elements; and a similar document detection unit configured to determine whether the web documents are similar documents based on the calculated weights.Type: GrantFiled: May 2, 2012Date of Patent: September 20, 2016Assignee: NHN CorporationInventors: Chae Hyun Lee, Dong Yun Sim
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Publication number: 20150032759Abstract: Disclosed are a system and a method for analyzing a result of clustering massive data. An open-source map/reduce framework named Hadoop is used to calculate a silhouette coefficient corresponding to a significance verification index capable of evaluating a result of clustering massive data. To implement the system and the method for analyzing a result of clustering massive data, clustered data is divided into blocks. For all of the blocks, input splits are generated. Then, the generated input splits are assigned to multiple computers. Each computer stores only data of blocks included in an input split assigned in a memory, and calculates a silhouette coefficient for each record. Each computer provides only the calculated silhouette coefficient to an index coefficient calculation apparatus, and enables the index coefficient calculation apparatus to calculate a silhouette coefficient for a cluster. Therefore, the result of clustering the massive data can be rapidly and objectively analyzed.Type: ApplicationFiled: October 31, 2012Publication date: January 29, 2015Applicant: SK Planet Co., Ltd.Inventors: Chae Hyun Lee, Min Soeng Kim, Jun Sup Lee
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Publication number: 20120284270Abstract: A method for detecting similar documents includes extracting an entity from each of a first web document and a second web document; determining an importance contribution element corresponding to each of the web documents; calculating, using the processor, weights for each entity based on the determined importance contribution elements; and determining whether the web documents are similar documents based on the calculated weights. A device to detect similar documents includes a storage device; an entity extractor stored on the storage device and configured to extract an entity from a first web document and a second web document and to determine an importance contribution element from each of the web documents; a weight calculator configured to calculate weights of each entity based on the determined importance contribution elements; and a similar document detection unit configured to determine whether the web documents are similar documents based on the calculated weights.Type: ApplicationFiled: May 2, 2012Publication date: November 8, 2012Applicant: NHN CORPORATIONInventors: Chae Hyun LEE, Dong Yun SIM
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Publication number: 20120102034Abstract: According to exemplary embodiments of the invention, a location-based keyword recommending system and method are provided. The location-based keyword recommending system may include a keyword collecting unit to store location information regarding a location where a keyword is input, a region setting unit to set a virtual region by performing clustering of the location information with reference to the keyword, a region combining unit to combine virtual regions overlapping each other into one virtual region, and a keyword recommending unit to provide a location-based keyword based on the keyword related to the location information of the virtual region.Type: ApplicationFiled: September 23, 2011Publication date: April 26, 2012Applicant: NHN CORPORATIONInventors: Byoung Hak KIM, Chae Hyun LEE
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Publication number: 20120004840Abstract: Provided are a system and method for computing a total travel time according to a transportation type, based, in part, on a waiting time to wait for traveling in the transportation. A system for computing a necessary time for travel may include an input unit to receive a starting point and a destination point, and a necessary time computing unit to compute a necessary time taken to travel from the starting point to the destination point, by adding a waiting time and a travel time, thereby minimizing an error in computing the necessary time for travel.Type: ApplicationFiled: June 30, 2011Publication date: January 5, 2012Applicant: NHN CORPORATIONInventors: Chae Hyun LEE, Seong Su LEE
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Patent number: 7893706Abstract: A test apparatus for a liquid crystal display device includes: a stage having a substrate thereon; a plurality of light emitting diodes (LEDs) on the stage and supplying a light to the substrate; a heating nozzle supplying a hot air to the substrate; a needle applying a test signal to the substrate; and a microscope inspecting the needle and the substrate.Type: GrantFiled: November 21, 2008Date of Patent: February 22, 2011Assignee: LG Display Co., Ltd.Inventor: Chae-Hyun Lee
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Publication number: 20090215347Abstract: A test apparatus for a liquid crystal display device includes: a stage having a substrate thereon; a plurality of light emitting diodes (LEDs) on the stage and supplying a light to the substrate; a heating nozzle supplying a hot air to the substrate; a needle applying a test signal to the substrate; and a microscope inspecting the needle and the substrate.Type: ApplicationFiled: November 21, 2008Publication date: August 27, 2009Inventor: Chae-Hyun Lee
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Publication number: 20070043858Abstract: A worm detection method and apparatus using an ARP packet are disclosed. The worm detection method and apparatus using an ARP packet according to the present invention can be easily implemented, and the driving load of program is less. Since a common characteristic of worm is used, it is possible to easily detect and remove all types of worms with only one time execution on a common computer.Type: ApplicationFiled: August 17, 2006Publication date: February 22, 2007Inventor: Chae Hyun LEE