Patent application number | Description | Published |
20080266276 | DATA DRIVER AND DISPLAY APPARATUS HAVING THE SAME - A display apparatus including a display driver. The data driver includes a converter to receive and convert image data in digital form into data voltages in analog form, and to provide the data voltages to output buffers. The output buffers receive and buffer the data voltages based on bias voltages generated as part of a feedback path between a bias voltage control circuit and the output buffers. The data voltages are provided to a display part. Before the data voltages output from the output buffers are provided to the display part, the bias voltage control part receives data voltage from the output buffers to count a slew rate of the data voltage, and varies the voltage level of the bias voltage based on the counted result of the slew rate, thereby providing feedback to the output buffers. Accordingly, differences of the slew rate between the data voltages output from the output buffers may be decreased. | 10-30-2008 |
20090100858 | AIR CONDITIONER - An air conditioner is disclosed which includes a case having one or more air intake portions, a heat exchanger inside the case, a fan in a vicinity of the heat exchanger, and an intake amount reducing member at one of the air intake portions that reduces an intake amount of introduced air. | 04-23-2009 |
20090104017 | Cross-flow fan and air conditioner - A cross-flow fan that variably maintains a distance between a blade and a fluid flow guide by varying a height of an outer edge and an air conditioner having the cross-flow fan are provided. Therefore, a noise and a peak value of a spectrum between the blade and the outer edge can be reduced. | 04-23-2009 |
20090104032 | AIR CONDITIONER - An air conditioner includes a fan and a rear guide which guides air to the fan. A recess is formed in a side surface of the rear guide which faces the fan. | 04-23-2009 |
20100126206 | INDOOR UNIT FOR AIR CONDITIONING APPARATUS - An indoor unit for an air conditioning apparatus is provided. The indoor unit includes a cross flow fan having a structure that can reduce noise and flow resistance of air passing through a heat exchanger in the indoor unit. | 05-27-2010 |
20100134471 | Output driving circuits of output buffers for source driver integrated circuits - An output driving circuit is provided that may reduce power consumption by decreasing static current leakage in a liquid crystal display device. The output driving circuit of an output buffer of a source driver integrated circuit may include: an output driving unit including a pull-up transistor and a pull-down transistor coupled to a source line driving signal output terminal; and a sub output driving unit configured to perform an output driving operation together with the output driving unit during a normal operation period of an active horizontal synchronization signal and configured to be disabled during a period in which the horizontal synchronization signal is inactive in response to a control signal, in order to reduce static current leakage flowing through the output driving circuit. Current leakage is reduced in the inactive period of a horizontal synchronization signal in an output driving circuit, thereby reducing power consumption of a liquid crystal display device. | 06-03-2010 |
20100164924 | Bias control circuit, source driver, and liquid crystal display device - A bias control circuit includes a counter unit, a decoder, a level shifter, and a bias block. The bias control circuit provides plurality bits of first signal indicating information on a plurality of groups based on a number of scanning lines and a number of groups. The decoder decodes the first signal to provide plurality bits of second signal. The level shifter shifts a voltage level of the second signal to provide a bias resistor selection signal. The bias block provides respective bias voltages to the corresponding respective groups by respective resistances being selected in response to the bias resistor selection signal. | 07-01-2010 |
20110148893 | OUTPUT BUFFER HAVING HIGH SLEW RATE, METHOD OF CONTROLLING OUTPUT BUFFER, AND DISPLAY DRIVING DEVICE INCLUDING OUTPUT BUFFER - An output buffer having a high slew rate, a method of controlling the output buffer, and a display driving device including the output buffer. The output buffer includes: a first output buffer adapted to output a source line driving signal to a first output terminal in response to a first control signal and output a source driving signal to a second output terminal in response to a second control signal; a second output buffer adapted to output a source line driving signal to a third output terminal in response to the first control signal and output a source line driving signal to a fourth output terminal in response to the second control signal; and a feedback circuit for connecting the first through fourth output terminals to negative input terminals of the first and second output buffers in response to the first control signal and the second control signal | 06-23-2011 |
20110242863 | PATCH ANTENNA AND RECTENNA USING THE SAME - A patch antenna for receiving high frequency wireless signal and a rectenna using the same, more particularly, an impedance-matched patch antenna adopting a slot capacitive coupling structure and a rectenna capable of generating electrical energy from the wireless signals having different frequency band. A rectenna for receiving an A.C. wireless signal carrying electrical energy and converting the wireless signal into a D.C. electrical energy, is comprised of: a patch antenna for receiving the wireless signal comprising an dielectric substrate, a patch that is formed at the upper area of the surface of the dielectric substrate and providing the first frequency response characteristics, a ground plane formed on the other surface of the dielectric substrate, and an impedance matching means providing the second frequency response characteristics; and a rectifying unit that converts the wireless signal, received via the patch antenna, into a D.C. electrical energy by rectifying the wireless signal. | 10-06-2011 |
20120127386 | MULTI-CHANNEL SEMICONDUCTOR DEVICE AND DISPLAY DEVICE COMPRISING SAME - A multi-channel semiconductor device comprises a plurality of buffer groups each comprising at least one output buffer, a plurality of pad groups each comprising at least one output pad, and a channel switching portion that controls connection between the plurality of buffer groups and the plurality of pad groups. One of the pad groups outputs an output signal of one of the buffer groups in a first operation mode and sequentially outputs output signals of all of the buffer groups in a second operation mode. | 05-24-2012 |
Patent application number | Description | Published |
20090107167 | AIR CONDITIONER - An air conditioner includes a case provided with openings, a heat exchanger disposed in the case, one or more fans disposed in the case, and a variation unit that is movably disposed around the fans to vary air inlet and outlet directions. | 04-30-2009 |
20090113915 | AIR CONDITIONER - Provided is an air conditioner. According to the air conditioner, an installation structure of an indoor heat exchanger installed inside the air conditioner is improved, so that the air conditioner become slim and an installation space for additional devices such as a filter can be secured. According to the air conditioner, the indoor heat exchanger divides a passage of air introduced into a main unit into an upper passage and a lower passage, so that interference between the upper and lower passages can be minimized, and thus operation efficiency of the air conditioner can improve. Also, a space of a predetermined size is formed between the indoor heat exchanger and air intake holes to receive a predetermined device such as a filter and a negative ion generator that can give a separate function to the air conditioner. | 05-07-2009 |
20100132393 | AIR CONDITIONER - Provided is an indoor unit of an air conditioner. The structures of the indoor unit, such as the relationship between an inlet and an outlet, the shape of a rear guide, and the relationship between the outlet and a vane, are improved. Therefore, the airflow of the indoor unit is stable, and the noise level of the indoor unit is low. | 06-03-2010 |