摘要:
A semiconductor light emitting diode (LED) and a manufacturing method thereof are disclosed. The method for manufacturing a semiconductor light emitting diode (LED) includes: forming a light emission structure including a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer on a substrate with prominences and depressions; removing the substrate from the light emission structure to expose a first concavoconvex portion corresponding to the prominences and depressions; forming a protection layer on the first concavoconvex portion; removing a portion of the protection layer to expose a convex portion of the first concavoconvex portion; and forming a second concavoconvex portion on the convex portion of the first concavoconvex portion. The semiconductor light emitting diode (LED) includes: a light emission structure including a first conductive type semiconductor layer, an active layer, and a second conductive type semiconductor layer; a first concavoconvex portion formed on the light emission structure and having a second concavoconvex portion at a convex portion thereof; and a protection layer filling up a concave portion of the first concavoconvex portion.
摘要:
Disclosed is an intermediate node apparatus for configuring a sensor network and a sensor data processing method using the intermediate node apparatus. The intermediate node apparatus may deliver sensor data measured by a sensor node apparatus to a neighboring node apparatus and may store the sensor data in a database.
摘要:
An apparatus and method for managing a dynamic bandwidth allocation to support a low-power mode, in a passive optical network (PON) are provided. The apparatus may include a power saving mode managing unit to manage a power saving mode of at least one optical network unit (ONU), a bandwidth allocation parameter storage unit to store a bandwidth allocation parameter used for a power saving mode, and to maintain the stored bandwidth allocation parameter, and a dynamic bandwidth allocating unit to provide bandwidth allocation information to the at least one ONU, when the stored bandwidth allocation parameter is received.
摘要:
Provided is a method of obtaining spatial images on demand. The server segments a spatial image into a plurality of regions to detect an isolated region whose continuity with peripheral regions is less than a threshold value, generates geographic information corresponding to the detected isolated region, and generates a capture request message including the generated geographic information. In addition, the capture request message may be transmitted to at least one terminal using unicast scheme, a multicast scheme, an anycast scheme, or a broadcast scheme. The capture request message may comprise a capture condition value such as a capture direction, a capture angle, a capture time, a zoom information and an exposure value. At least one terminal which meets the capture condition value within the capture request message transmits a captured image to the server.
摘要:
A small-sized surface-mounted fuse and a method of manufacturing the same. A fusing element, separated from a winding member, is connected to lead wires by arc welding instead of soldering. Consequently, the present invention has the effect of improving fusing characteristics and productivity while reducing the defective rate and manufacturing costs. To this end, the manufacturing method according to the present invention comprises winding a fusing element predetermined winding turns on a winding member having a predetermined length, cutting both ends of the fusing element wound the predetermined winding turns on the winding member, separating the fusing element having the cut ends from the winding member, pressing the upper ends of lead wires 11 inserted through two through-holes formed at a base while being spaced a predetermined distance from each other such that the upper ends have predetermined areas, respectively, putting the ends of the fusing element on the pressed upper ends of the lead wires, connecting the ends of the fusing element to the upper ends of the lead wires by arc welding, and covering the base with a cover.
摘要:
Disclosed herein is a power line channel-adaptive communications system and method. The power line channel-adaptive communications system includes a transmitting end, a channel-adaptive controller, and a receiving end. The transmitting end generates an adaptive chirp symbol signal of a preset type for transmission data according to a channel state of the power line, modulates the generated adaptive chirp symbol signal in any one of first and second transmission modes, and transmits the modulated adaptive chirp symbol signal via the power line channel. The channel-adaptive controller controls the type and transmission mode of the adaptive chirp symbol signal. The receiving end restores the transmission data by demodulating the adaptive chirp symbol signal, received via the power line channel, in any one of the first and second transmission modes according to the channel state of the power line.
摘要:
A method and apparatus for supporting user mobility by allowing guest access in an Internet service network and a billing method based on the same are provided. The method for supporting user mobility by allowing guest access in an Internet service network includes the steps of: performing user authentication and querying a subscriber DB to determine whether a user is a host user or a guest user when a subscriber ID is inputted; querying the subscriber DB to determine whether there is an available bandwidth for the guest user when the user is the guest user; and querying the subscriber DB to provide a service package corresponding to the guest user when there is an available bandwidth for the guest user.
摘要:
Disclosed are a semiconductor light emitting device and a method of manufacturing the same. The method includes providing a substrate having first and second main surfaces opposing each other and forming a first uneven structure in the first main surface, forming a sacrificial layer on the first main surface of the substrate, forming a mask having open regions on the sacrificial layer so as to expose a portion of an upper surface of the sacrificial layer, forming a second uneven structure in the substrate by etching the sacrificial layer and the substrate through the open regions, removing the sacrificial layer and the mask from the substrate, and forming a light emitting stack on the first and second uneven structures of the substrate.
摘要:
Provided is an image extraction method of optical phase extraction system. The image extraction method may include checking whether a phase error due to an environmental disturbance of optical fiber occurs by monitoring an output signal obtained by interfering reflection optical signals reflected through two paths. When a phase error occurs, an error is compensated using a phase compensation control method of closed loop type through one of the two paths and an image is extracted by capturing an image of object in a state that the image of object is shifted by the set phase value when a phase error is compensated. According to the inventive concept, a phase error occurring in an optical fiber type interferometer due to an environmental disturbance is minimized or compensated. Also, since an interference image accurately shifted by the phase value set among arbitrary various phase values is obtained through a camera, reliability of three-dimensional phase information being extracted is guaranteed.
摘要:
An apparatus and method for managing a dynamic bandwidth allocation to support a low-power mode, in a passive optical network (PON) are provided. The apparatus may include a power saving mode managing unit to manage a power saving mode of at least one optical network unit (ONU), a bandwidth allocation parameter storage unit to store a bandwidth allocation parameter used for a power saving mode, and to maintain the stored bandwidth allocation parameter, and a dynamic bandwidth allocating unit to provide bandwidth allocation information to the at least one ONU, when the stored bandwidth allocation parameter is received.