Patent application number | Description | Published |
20100183150 | Shared key management method, shared key generating method and message communication method for scada system, and recording medium - A shared key management method for a Supervisory Control And Data Acquisition (SCADA) system in which a master terminal unit (MTU), a plurality of sub master terminal units (SUB-MTUs), and a plurality of remote terminal units (RTUs) are configured in a sequential hierarchy, is provided. The method includes: (a) at the MTU, generating a plurality of secret keys and respectively allocating the secret keys to the RTUs; (b) at the MTU, generating a group key in a tree structure, wherein a leaf node of the tree structure corresponds to each RTU, a parent node of a node corresponding to an RTU corresponds to a SUB-RTU to which the RTU is connected, a shared key of each node of the group key is generated by hashing shared keys of all child nodes, and a shared key of a leaf node of the group key is set as a secret key of the RTU; (c) at the RTU or the SUM-MTU, receiving and storing shared keys of every node from a node corresponding to itself to a root node; (d) when the RTU or the SUM-MTU is added or deleted, at the MTU, generating shared keys of nodes along a path from a node corresponding to the added or deleted terminal unit to the root node again; and (e) at the RTU or the SUB-MTU, receiving and storing the generated shared keys. According to the key management method for the SCADA system described above, in the case of encrypting and broadcasting or multicasting a message, a computation amount can be reduced. | 07-22-2010 |
20100316246 | SPEAKER DEVICE FOR PORTABLE TERMINAL - A speaker device for a portable terminal is provided. The device includes a case frame forming an exterior of the portable terminal, a speaker installation space provided at an inner surface of the case frame to install a speaker therein, a barrier wall formed to provide a resonance space near the speaker installation space, and a cover installed to seal the resonance space. | 12-16-2010 |
20110037664 | BUILT-IN ANTENNA MODULE IN PORTABLE WIRELESS TERMINAL - A built-in antenna module of a portable wireless terminal includes an antenna radiator, electrically connected to a main board, for transmitting and receiving a signal of a specific frequency band, and at least one unit fixed to a specific structural member and electrically connected to the main board by means of a Flexible Printed Circuit Board (FPCB), wherein the antenna radiator is implemented integrally with the FPCB. | 02-17-2011 |
20130300710 | METHOD AND ELECTRONIC DEVICE THEREOF FOR PROCESSING FUNCTION CORRESPONDING TO MULTI-TOUCH - A method for processing a function corresponding to a multi-touch in an electronic device is provided. In the method, data is displayed in one or more formats. A first touch is detected. If a second touch is detected with the first touch being maintained, a function corresponding to a multi-touch operation is performed. The function corresponding to the displayed data type and the second touch is performed based on coordinates of the first touch. | 11-14-2013 |
20140054564 | ELECTROLUMINESCENT DEVICE USING ELECTROLUMINESCENT COMPOUND AS LUMINESCENT MATERIAL - Provided is an organic electroluminescent device that exhibits an efficient host-dopant energy transfer mechanism, and thus, expresses a certain high-efficiency electroluminescent performance, based on improved electron density distribution. The organic electroluminescent device also overcomes low initial efficiency and short operation life property, and secures high-performance electroluminescent performance with high efficiency and long life property for each color. | 02-27-2014 |
20140077179 | NOVEL COMPOUND FOR ORGANIC ELECTRONIC MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME - Provided are a novel compound for an organic electronic material and an organic electroluminescent device using the same. The compound for an organic electronic material according to the present invention has high electron transport efficiency, thereby preventing crystallization at the time manufacturing of a device, and allows a layer to be easily formed, thereby improving current characteristics of the device, and thus an OLED device having a lowered driving voltage and improved power efficiency as well as superior luminous efficiency and lifespan characteristics as compared with the existing material can be manufactured. | 03-20-2014 |
20140336392 | NOVEL ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME - The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device containing the same. Using the organic electroluminescent compounds of the present invention, it is possible to manufacture an OLED device with a long operating lifespan and high luminous efficiency. In addition, the compounds can improve the power efficiency of the device and reduce overall power consumption. | 11-13-2014 |
20140346406 | ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE ORGANIC ELECTROLUMINESCENT COMPOUNDS - The present invention relates to an organic electroluminescent device comprising a combination of specific host compounds and specific dopant compounds. The organic electroluminescent device according to the present invention shows a blue emission; and has a long operating lifespan, high efficiency, high brightness, good color purity, low driving voltage, and improved operational stability. | 11-27-2014 |
20140364625 | NOVEL ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME - The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device comprising the same. Using the organic electroluminescent compounds of the present invention as a phosphorescent host material, a hole transport material, and a mixed host material, it is possible to manufacture an OLED device with improved current efficiency. | 12-11-2014 |