摘要:
Disclosed are asymmetric styryl derivatives and an organic light emitting diode prepared using the same. More particularly, there are provided asymmetric styryl derivatives that can provide a blue organic light emitting diode with superior thermal stability, as well as improved luminous efficiency, improved brightness, and extended lifetime, by synthesizing a novel thermally stable compound with a styryl structure represented by Formula 1, and using the compound as a dopant in an organic light emitting layer (EML) of a multilayered organic light emitting diode, and an organic light emitting diode prepared by the same.
摘要:
Disclosed are asymmetric styryl derivatives and an organic light emitting diode prepared using the same. More particularly, there are provided asymmetric styryl derivatives that can provide a blue organic light emitting diode with superior thermal stability, as well as improved luminous efficiency, improved brightness, and extended lifetime, by synthesizing a novel thermally stable compound with a styryl structure represented by Formula 1, and using the compound as a dopant in an organic light emitting layer (EML) of a multilayered organic light emitting diode, and an organic light emitting diode prepared by the same.
摘要:
A data push service system and method using a heterogeneous network. The system transmits push data to a Hybrid Access Terminal (HAT) in a heterogeneous mobile communication system in which at least one circuit network overlaps with at least one packet network. The HAT can be connected to a circuit network or a packet network, and is registered in a new access network. The system includes a Packet Service & Mobility Gateway (PSMG) for acquiring access state and connection information of the HAT from the circuit network and the packet network, and generating an access network switching request upon receipt of an external request signal; and a Push Proxy Gateway (PPG) for acquiring access information of the HAT which will transmit the push data from the PSMG, and transmitting a request message to the PSMG.
摘要:
A method and system for providing a handoff between a mobile communication network including a mobile switching center (MSC) and a home location register (HLR), and a wireless local area network (WLAN) including an access point (AP) and a voice over Internet protocol (VoIP) gateway to provide a VoIP service. The HLR registers therein subscriber information for the MT including an Internet protocol (IP) address of the AP. The MT transmits a handoff request to the MSC if the MT connected to the mobile communication network has moved to a region of the WLAN. The HLR transmits the subscriber information to the VoIP gateway. The AP allocates an IP address and a channel for WLAN access by the MT, and sets a session for a VoIP service of the MT.
摘要:
An apparatus includes: a process chamber for treating a substrate; a susceptor in the process chamber; a supporting frame over the susceptor; and at least one wire connected to the supporting frame.
摘要:
An apparatus includes: a process chamber for treating a substrate; a susceptor in the process chamber; a supporting frame over the susceptor; and at least one wire connected to the supporting frame.
摘要:
A system for providing communication when a mobile station moves between a wireless LAN system and a mobile communication system. A packet data service node provides a packet data service between an IP network and the mobile station when the mobile station accesses the mobile communication system. A packet control function provides the packet data service between a correspondent node connected to the IP network and the mobile station when the mobile station previously connected to the mobile communication system is connected to an access point, and provides the packet data service between the correspondent node connected to the IP network and the mobile station when the mobile station previously connected to the access point is connected to a base station system. An interworking server connected between the access point of the wireless LAN system and the packet control function of the mobile communication system.
摘要:
A method for fabricating a semiconductor device includes: providing a substrate structure including a bit line and a capacitor formed apart from each other at a different level; forming first, second, and third insulation layers over the bit line, the second insulation layer being a first etch stop layer; forming a second etch stop layer over a top electrode of the capacitor; forming a fourth insulation layer over the third insulation layer and the second etch stop layer; and performing a plurality of etch steps to expose an upper surface of the bit line and an upper surface of the capacitor.
摘要:
Provided is a method of cross-paging including transmitting mobile terminal location information from a mobile communication system to a heterogeneous mobile communication system after the mobile terminal location registration. The mobile communication system is then requested to page the mobile terminal according to the received information in the heterogeneous mobile communication system and, then the mobile terminal is paged. Further provided is a method of cross-paging that includes determining whether the mobile terminal has been location-registered in the mobile communication system or in the heterogeneous mobile communication system with reference to pre-registered mobile terminal location information when a mobile terminal paging request occurs in the heterogeneous mobile communication system. A cross-paging message is then transmitted from the heterogeneous mobile communication system to the mobile communication system if the mobile terminal has been location-registered in the mobile communication system and then the mobile terminal is paged.
摘要:
An apparatus and method for providing Short Message Service (SMS) and Multimedia Messaging Service (MMS) over a wired telephone network are provided. In an Access Point (AP), an access module provides a wireless connection interface for wireless communication with a convergence terminal. A control module controls wireless communication and communications with the wired telephone network to provide the SMS and the MMS to the convergence terminal via the access module. A wired phone module, connected to the access module and the wired telephone network, exchanges wireless communication signals with the wired telephone network. An SMS processor, connected to the access module and the wired telephone network, processes SMS transmission and reception, and an MMS processor, connected to the access module, processes MMS transmission and reception.