Patent application number | Description | Published |
20080211743 | Plasma display device and driving method of plasma display panel - A driving method of a plasma display panel including a plurality of first electrodes, a plurality of second electrodes, and a plurality of third electrodes formed in a direction to be intersected with the first electrodes and the second electrodes is disclosed. The method includes resetting the electrodes by applying a waveform having a predetermined voltage to the first electrode, applying a fourth voltage to the second electrodes for a predetermined period; selecting cells to be discharged by applying a scan pulse voltage to each of the first electrodes and the third electrodes; and alternately applying a plurality of sustain discharge pulses having a first voltage as peak value to each of the first electrodes and the second electrodes, wherein the step of applying the fourth voltage Ve stops the application of the fourth voltage Ve while the first sustain discharge pulse of the first electrodes continues. | 09-04-2008 |
20090033232 | PLASMA DISPLAY AND VOLTAGE GENERATOR THEREOF - A plasma display device including a plasma display panel (PDP), a temperature detector for detecting temperature of the PDP, a driver for applying a driving voltage to a scan electrode, and a controller for generating a control signal to control the driver according to the temperature. The driver includes a transistor and first and second resistors. The transistor is coupled between a first power source and the scan electrode. The first power source supplies a scan voltage to the scan electrode. At least one of the first resistor and the second resistor is a variable resistor having a resistance that varies according to the control signal of the controller. A low discharge due to high temperature can be reduced or prevented, and the number of power sources of the plasma display device can be reduced. | 02-05-2009 |
20090128539 | Plasma display device and driving method thereof - A scan electrode driver includes a scan integrated circuit including first and second control signal input terminals, a data input terminal, first and second voltage terminals and a plurality of output terminals, and a logic element. A voltage of the plurality of output terminals may be a voltage of one the plurality of voltage terminals at least based on a level of a control signal transmitted to the first control signal input terminal. The logic element may be adapted to perform an operation on the control signal to generate a second control signal to be applied to the second control signal input terminal. The scan integrated circuit may establish a voltage of the plurality of output terminals to be a voltage of the first or second voltage terminal based on a level of the control signal. | 05-21-2009 |
20090174627 | PLASMA DISPLAY AND DRIVING DEVICE AND METHOD THEREOF - A plasma display, a driver for the plasma display, and a driving method thereof apply a reset minimum voltage according to a detected temperature of the plasma display. In the driving method, a reset falling waveform gradually decreasing to a reset minimum voltage is applied to a scan electrode during a falling period of a reset period, and a scan voltage is applied to the scan electrode selected during an address period. An address period is started the voltage applied to the scan electrode reaches the reset minimum voltage. In addition, a voltage difference between the reset minimum voltage and the scan voltage is determined according to a temperature of the plasma display. | 07-09-2009 |
20150145606 | POWER AMPLIFIER - A power amplifier may include a first amplifying unit receiving a first bias signal to amplify a power level of an input signal; an envelope detecting unit detecting an envelope of the input signal; a comparing circuit unit comparing a peak value of the detected envelope with a preset reference voltage; and a second amplifying unit amplifying the power level of the input signal according to a second bias signal set depending on a comparison result of the comparing circuit unit. | 05-28-2015 |
20150180470 | SWITCHING CIRCUIT AND RF SWITCH INCLUDING THE SAME - A switching circuit may include a switching circuit unit; a reference voltage unit connected between the switching circuit unit and a signal input terminal and providing a preset reference voltage; and a voltage generating unit dividing a first control voltage provided to the switching circuit unit by a preset magnitude to generate a second control voltage corresponding to the reference voltage, and providing the second control voltage to bodies of the plurality of respective switching devices. | 06-25-2015 |
20150188501 | POWER AMPLIFYING APPARATUS - A power amplifying apparatus may include a first amplifying unit receiving power and amplifying a high frequency signal, a second amplifying unit receiving the power and amplifying the high frequency signal from the first amplifying unit, and a control unit controlling an operation of the first amplifying unit or the second amplifying unit. The first amplifying unit and the control unit are disposed on a complementary metal oxide semiconductor (CMOS) substrate, and the second amplifying unit is disposed on a GaAs substrate. | 07-02-2015 |
20150188597 | RF SWITCH - A RF (Radio Frequency) switch may include: a common port; a first switching unit including a plurality of first switching devices; a second switching; a negative voltage generating unit sensing the high frequency signal from the common port and rectifying the sensed high frequency signal to generate a negative voltage; and a logic circuit unit controlling switching operations of the first and second switching units using the negative voltage provided from the negative voltage generating unit and a positive voltage provided from the outside. | 07-02-2015 |
20150188600 | SWITCHING CIRCUIT AND RF SWITCH INCLUDING THE SAME - A switching circuit may include: the switching circuit includes a switching circuit unit including a first transistor and a second transistor connected to each other in series, the second transistor receiving a first control signal through a control terminal thereof, and an inverter connected between a control terminal of the first transistor and a first terminal of the first transistor. The inverter receives a second control signal and maintains a gate-source voltage level of the first transistor to a threshold voltage level of the first transistor or less, and levels of the first and second control signals are logically complementary to each other. | 07-02-2015 |