Abstract: A pyrene compound is provided. The pyrene compound is represented by Formula 1: wherein A1 and A2 are as defined in the specification. Further provided is an organic electroluminescent device using the pyrene compound. The organic electroluminescent device has high color purity of blue light and shows long life characteristics. Therefore, the organic electroluminescent device is suitable for use in displays and lighting systems.

Abstract: An organometallic complex represented by Formula 1 is provided. An organic light-emitting diode using the organometallic complex exhibits improved current and power efficiency and long lifetime.

Abstract: An organometallic complex represented by Formula 1 is provided. An organic light-emitting diode using the organometallic complex exhibits improved current and power efficiency and long lifetime.

Abstract: A blue light emitting compound and an organic electroluminescent device using the compound are provided. The device exhibits improved color purity of blue emission and excellent life characteristics so as to be used to manufacture a full-color display.

Abstract: A pyrene compound is provided. The pyrene compound is represented by Formula 1: wherein A1 and A2 are as defined in the specification. Further provided is an organic electroluminescent device using the pyrene compound. The organic electroluminescent device has high color purity of blue light and shows long life characteristics. Therefore, the organic electroluminescent device is suitable for use in displays and lighting systems.

Abstract: A blue light emitting compound and an organic electroluminescent device using the compound are provided. The device exhibits improved color purity of blue emission and excellent life characteristics so as to be used to manufacture a full-color display.

Abstract: A hot-plugging method for a display apparatus is disclosed which includes the steps of reading information pertaining to a display apparatus by a predetermined data communication upon recognizing that a display apparatus has been newly connected while a controller provided in a main body of a computer maintains judging of a new connection of display apparatus; judging whether the read information is identical to the previously stored information stored at a memory pertaining to the current display apparatus; and storing the newly read information the newly read information is not identical to the previously stored information, determining an optimal resolution corresponding to the newly connected display apparatus and transmitting the optimal resolution to a video card.

Abstract: An audio output apparatus having a wireless speaker is provided in an apparatus which outputs audio signal of 5.1 channel. In the audio output apparatus, an audio signal encoded in accordance with an IEEE 1394 protocol is received by a sub-woofer speaker through an IEEE 1394 communication line, is decoded in the sub-woofer speaker, is modulated by a spread spectrum FM modulation method, and is then transmitted to a plurality of wireless-connected speakers so as to be outputted.

Abstract: A key signal from a wireless keyboard or wireless mouse is received by a display apparatus and is transmitted to a personal computer (PC) through a USB line, and a process signal is received from the PC to control peripheral equipment connected to the display apparatus. The wireless key input processing apparatus includes: a key input unit having an infrared transmitting unit for converting a signal inputted by a user through a wireless keyboard and/or wireless mouse to an infrared signal, and for transmitting it; a display unit for receiving the wireless key signal outputted from the transmitting unit, converting it to USB information, outputting the converted information through the USB line as upstream data; and a PC for identifying the key input corresponding to information from the keyboard and/or mouse as recorded on a ROM BIOS upon receipt of the USB information from the display unit.

Abstract: A micro display projection system having electronically controlled color switches comprises: an image producing part for producing images to be projected under electronic control; an illumination part for illuminating light; a color division part having semitransparent reflection mirrors for transmitting red(R), green(G) and blue(B) colors, respectively, derived from the illuminated light; a color switching part having plural color switches disposed on the respective light paths from the respective reflection mirrors, each color switch having a light stopper region and a light transmission region to project the respective R, G and B colors separated in the color division part; and a light collecting part disposed adjacent to the color switching part for converging the colors so as to illuminate the respective colors on regions of the image producing part.

Abstract: An micro display projection system having electronically controlled color switches comprises: an image producing part for producing images to be projected under electronic control so as to generate an electrical signal having an image signal; an illumination part constructed to illuminate light on the image producing part; a color division part constructed with semitransparent reflection mirrors for transmitting lights of respective red (R), green (G) and blue (B) colors derived from the illuminated light; a color switching part constructed with plural color switches disposed on the respective light paths from the respective reflection mirrors, each color switch being divided into a light stopper region and a light transmission region to project the light on the region for transmitting the respective R, G and B colors separated in the color division part, and a light collecting part disposed adjacent to the color switching part for converging the colors on the image producing part to illuminate the respective

Abstract: An apparatus for automatically compensating for the deflection of electron beam in a cathode ray tube display by the earth's magnetic field (EMF) detects the EMF at the installation site of the cathode ray tube display by the EMF detector comprising a plurality of magnetic sensors for sensing the x, y, z component of magnetic field. A pulse generator and a counter transform each detected component of the EMF into a predetermined gate signal and then output the gate signal to the microcomputer. The microcomputer compares the gate signal indicative of the detected EMF with a reference signal stored in the internal memory to obtain a compensation value. The microcomputer further outputs the compensation value to a processor, which automatically compensates for the deflection of electron beam in a cathode ray tube.