摘要:
Provided are an acousto-optic filter and an optical code division multiple access (CDMA) system using the acousto-optic filter. The acousto-optic filter includes: an acousto-optic mode converter (AOMC) converting an optical signal of a specific optical frequency corresponding to a frequency of an electric signal of an optical signal of a first mode having a predetermined optical frequency band; and a mode stripper (MS) stripping an optical signal of the optical signal of the first mode that has been converted to a second mode.
摘要:
Provided is a cooling apparatus for a flat display device. The cooling apparatus includes a flat display module, a cover for protecting the flat display module, an air inlet formed on a portion of the cover to allow external air to be introduced into the cover, an air outlet formed on one of four frame portions of the cover to allow the air introduced through the air inlet to be exhausted out of the cover, and a fan for directing the air in a direction extending from a screen surface of the flat display device.
摘要:
There is provided a cooling apparatus for a flat display device. The cooling apparatus includes a flat display module, a cover for protecting an exterior of the flat display module, an air inlet formed on one side of the cover, for introducing external air, an air outlet formed in the other side of the cover, for discharging high temperature air contained inside the cover, and a shield for selectively closing the air outlet to prevent inflow of foreign substances.
摘要:
Provided is a method of manufacturing a thin film transistor (TFT) including a transparent ZnO thin layer that is formed at a low temperature by causing a surface chemical reaction between precursors containing elements constituting the ZnO thin layer. The method includes the steps of: depositing a gate metal layer on a substrate and forming a gate electrode using photolithography and selective etching processes; depositing a gate insulator on the substrate having the gate electrode; forming source and drain electrodes; and depositing a ZnO thin layer on the gate insulator using a surface chemical reaction between precursors containing elements constituting the ZnO thin layer.
摘要:
A laser diode drive circuit drives a high-power laser diode using a single voltage source and a transistor. The laser diode drive circuit includes: a voltage-level shifter shifting an output voltage of an analog signal processor to a predetermined-level voltage; a voltage adder for adding a predetermined voltage according to a record or reproduction mode of an optical disc to the level-shifted voltage; and an amplifier for amplifying a current signal of a power-supply unit in response to the added voltage and outputting the amplified current signal to a laser diode.
摘要:
Disclosed herein are a novel nitrogen semiconductor compound simultaneously including groups with different electrical properties and a device fabricated using the nitrogen semiconductor compound as an organic semiconductor material or a hole conducting material. The nitrogen semiconductor compound can be spin-coated at room temperature when applied to the fabrication of the device, and has superior electrical conductivity and photovoltaic properties.
摘要:
An organic electroluminescent (EL) device having improved efficiency and service life is provided. The organic electroluminescent device has a stack structure including an emitting layer and an electron-transport layer positioned between an anode and a cathode. The electron-transport layer includes a first layer adjacent to the emitting layer which may be a mixture of at least two materials, and a second layer adjacent to the cathode which may be a mixture of at least two materials. The mixture of at least two materials may be a mixture of an organic compound and one or more other organic compounds, or may be a mixture of a metal or inorganic compound and one or more other metal or inorganic compounds, or may be a mixture of one or more organic compounds and one or more metal or inorganic compounds.
摘要:
A portable surveillance camera and a personal surveillance system are disclosed. More specifically, provided are a portable surveillance camera comprising a mini-camera such as a CMOS camera or a CCD camera, and a system for surveilling a predetermined place using the portable surveillance camera. The personal surveillance system receives multimedia data such as image, sound, event and control data on real time from the portable surveillance camera installed in various areas such as a house, a shop or an office with a control device connectable to a network such as a LAN or an internet, and then monitors or stores the multimedia data. Also, the personal surveillance system can search, surveille, control, edit and store multimedia data such as image, sound, event and control data for a desired period of time from data stored in the portable surveillance camera or the control device.
摘要:
A current reduction circuit of a semiconductor device is disclosed which includes an enabling signal generator which outputs a predetermined enabling signal in association with a cell block in which a bridge has been formed between a word line and a bit line, and an isolation controller which is enabled in response to the enabling signal, and outputs a control signal to periodically isolate the bridge-formed cell block from a sense amplifier array for a predetermined period in a standby mode in response to a periodic signal enabled at intervals of a predetermined time.
摘要:
Provided is an LCD capable of compensating for a resistance variation in a link unit. The resistance variations in the gate lines, data lines and common lines are reduced to minimize the signal distortion in the LCD. Accordingly, it is possible to enhance the image quality characteristics of the LCD. The resistance variation can be reduced by adjusting the number or the size of contact holes in the link unit.