Abstract:
A power supply circuit to detect whether or not abnormal current is generated in a power factor compensation circuit and forcibly stop an operation of an interleaved power factor compensation circuit controller if abnormal current is generated. The power supply circuit includes a rectifier, a power factor compensation circuit including a plurality of reactors, a plurality of switches and a plurality of current detectors, a power factor compensation circuit controller to control switching of the switches and to control a power factor compensation operation, and a power factor compensation circuit protection circuit to receive the voltages output from the plurality of current detectors and to stop the operation of the power factor compensation circuit controller if at least one of the voltages output from the plurality of current detectors is abnormal. Thus, it is possible to prevent failure of the switches and the current detectors due to abnormal current.
Abstract:
Disclosed herein are a system for energy storage may include: a unit cell package in which the plurality of unit cells are connected in series and/or in parallel; an input/output terminal connected with the unit cell package to supply energy to the unit cell package or output energy stored in the unit cell package; an interruption switch connected between the unit cell package and the input/output terminal to connect or interrupt the unit cell package and the input/output terminal with and from each other; a slave connected with the plurality of unit cells and/or the unit cell package to monitor voltages of the plurality of unit cells and/or a voltage of the unit cell package; and a master connected with the slave to receive information monitored by the slave and generate a signal for controlling the slave and the interruption switch in accordance with the monitored information.
Abstract:
Disclosed are a non-fluorine and non-silicon hydrocarbon-based adhesive composition for substrate surface treatment for inkjet printing, a substrate surface-treated by the composition, and a method for modifying the surface of the substrate by using the composition so as to form fine lines by means of inkjet nano ink. The disclosed composition includes only an epoxy resin, or includes an epoxy resin and an acrylic compound, so as to hydrophobically modify the substrate. The composition can achieve better properties such as an increase in an ink contact angle, an ink spreadability inhibiting effect, and a wiring adhesive strength, as compared to a conventional silicon-based and/or fluorinated adhesive. Furthermore, since a conventional silicon-based and fluorinated adhesive component is not used, it is possible to perform substrate surface treatment in terms of environmental safety, thereby improving the productivity and the economic efficiency.
Abstract:
There is provided an apparatus for equalizing voltage using a time switch. The apparatus for equalizing voltage includes a plurality of energy storage unit cells connected in series; a single first balance capacitor connected with each energy storage unit cell in parallel through the first switch module for equally charging voltage between the plurality of energy storage unit cells; and a first switch module including a plurality of switches disposed between each energy storage unit cell and the first balance capacitor to sequentially open and close the connection between each energy storage unit cell and the first balance capacitor, whereby the voltage unbalance between the energy storage unit cells can be prevented at low cost.
Abstract:
Provided are a method and an apparatus for predicting a preference rating for content, and a method and an apparatus for selecting sample content in order to predict a preference rating for the content. In the method of predicting a preference rating for the content, a list of users having similar preferences to a target user is extracted from content usage information collected with respect to the same content, and the target user's preference rating for the content is predicted by applying preference rating information of the users with similar preferences to a machine learning algorithm.
Abstract:
A photographing apparatus includes a third optical group arranged between a second optical group and an iris, and to stabilize hand tremor, and the third optical group is moved along a sphere that has a center based on a predetermined point on an optical axis. As a result, a photographing apparatus has an efficient hand tremor stabilization.
Abstract:
A cooling apparatus having an auxiliary chiller is provided. The apparatus can include a wafer chuck on which a wafer is mounted and in which a cooling cavity is formed. A main chiller having a main coolant reservoir can be spaced apart from the wafer chuck. The cooling cavity and the main coolant reservoir can be arranged in communication with each other through coolant passages. The coolant passages can include an auxiliary chiller detachably installed thereon, respectively. A method of cooling a wafer chuck or process chamber during a semiconductor device fabrication process is also provided. Using the method and apparatuses of this invention, fine temperature adjustments of the wafer chuck are possible.
Abstract:
A system includes a subscriber identity module (SIM card and a communication circuit. The communication circuit communicates with an external device through a first wireless interface, and communicates with the SIM card through a second wireless interface. The SIM card includes a functional circuit core, an antenna and a transceiver connected to the functional circuit core and the antenna. The transceiver is configured to communicate a data signal between the functional circuit core and the communication circuit through the antenna, the communication circuit using the second wireless interface.
Abstract:
The present invention relates generally to an optical interconnection module for vertical optical coupling and a method of manufacturing the optical interconnection module. The optical interconnection module includes an optical waveguide. The optical waveguide includes substrate on which electrode pads and a predetermined circuit pattern are formed; a light source unit provided on the substrate and configured to generate an optical signal and emit the signal to an outside; an optical detection unit for receiving the optical signal from the light source unit and converting the optical signal into an electric signal; drive units provided on the substrate and configured to drive the light source unit and the light detection unit in response to electric signals supplied through the electrode pads; and a cladding layer, a core layer layered on the cladding layer, and an elliptical reflecting mirror surface placed on an end of the core layer facing the light source unit.
Abstract:
Provided is a high voltage transistor in a flash memory device comprising: a source/drain junction of a DDD structure consisting of a high-concentration impurity region and a low-concentration impurity region surrounding the high-concentration impurity region, the high-concentration impurity region being formed in parallel with a gate electrode at a distance spaced by a location in which a contact hole is formed, and having a rectangular shape whose width is the same as or wider than that of the contact hole and whose length is the same as or narrower than that of an active region through which the gate electrode passes. Accordingly, a current density to pass the gate electrode neighboring the contact hole portion and a current density to pass the gate electrode at a portion where the contact hole cannot be formed become uniform. A uniform and constant saturation current can be obtained regardless of the number of the contact hole.