Class / Patent application number | Description | Number of patent applications / Date published |
345210000 | Having three or more voltage levels | 22 |
20090033647 | PLASMA DISPLAY AND DRIVING METHOD THEREOF - In a plasma display device, a plurality of sustain pulses that alternately have a high level voltage and a low level voltage are applied with an opposite phase to that of first and second electrodes that perform a display operation in a sustain period. A width of the last sustain pulse applied to the second electrode in a first time where an accumulated driving time of a plasma display device exceeds a predetermined time is set to be shorter than a width of the last sustain pulse applied to the second electrode in a second time where the accumulated driving time is smaller than the predetermined time. | 02-05-2009 |
20090066681 | DIGITAL-TO-ANALOG CONVERTER INCLUDING A SOURCE DRIVER AND DISPLAY DEVICE AND METHOD FOR DRIVING THE DIGITAL-TO-ANALOG CONVERTER - Provided are a division-type DAC, a method for driving the division-type DAC, a source driver and a display device having the division-type DAC. A decoder of the DAC is divided into a plurality of decoders, so that the number of transistors of each decoder is reduced and the size of the decoder is reduced. Therefore, the DAC with the reduced size, the method for driving the DAC, the source driver and the display device having the DAC with the reduced size can be provided. | 03-12-2009 |
20090073151 | Plasma Display Panel Driving Method and Plasma Display - In a plasma display panel driving method, a final voltage of a falling ramp voltage is reduced to a voltage for firing a discharge at all the discharge cells in a reset period. A difference between a voltage at an address electrode of a discharge cell to be selected and a voltage applied to a scan electrode is established to be greater than a maximum discharge firing voltage in an address period. A voltage greater than a sustain voltage is applied to the scan electrode so as to convert positive wall charges which can be formed on the scan electrode of a discharge cell which is not selected in the address period into negative wall charges. | 03-19-2009 |
20090122043 | SYSTEMS FOR DISPLAYING IMAGES - A system for displaying images is provided. The system comprises a reference voltage source, a digital-to-analog converter, a multiplier and a buffer. The reference voltage source outputs a voltage signal, wherein the magnitude of the voltage signal is 1/N of a driving voltage. The digital-to-analog converter converts the voltage signal to a first voltage. The multiplier receives and multiplies the first voltage by N to output the driving voltage. The buffer receives the driving voltage to drive a data line. | 05-14-2009 |
20090295771 | PLASMA DISPLAY DEVICE AND DRIVING METHOD THEREOF - A plasma display device and a driving method thereof for reducing an internal potential and a temperature of a scan integrated circuit (IC) and reduce manufacturing costs. The plasma display device includes: a scan electrode, a sustain electrode, a scan IC electrically coupled to the scan electrode; a first switch electrically coupled between the scan IC and a first voltage source; a second switching switch electrically coupled between the scan IC and a second voltage source; a third voltage source electrically coupled between the first and second switches to supply a third voltage; and a third switch electrically and serially coupled to the third voltage source between the first and second switches. | 12-03-2009 |
20090322722 | Display device, a method of driving the same, and electronic apparatus including the same - Disclosed herein is a display device, including a display portion including a plurality of first wirings and a plurality of second wirings each disposed in rows, respectively, a plurality of third wirings disposed in columns, respectively, and a plurality of light emitting elements and a plurality of pixel circuits each disposed in a matrix, a first drive portion for successively applying a selection pulse containing a first voltage, a second voltage and a third voltage to the plurality of first wirings, a second drive portion for successively applying a current control pulse in accordance with which a transient current is caused to flow through the pixel circuit to the plurality of second wirings, and a third drive portion for applying a signal pulse containing a signal potential corresponding to a video signal to each of the plurality of third wirings. | 12-31-2009 |
20100073342 | PLASMA DISPLAY APPARATUS - A plasma display apparatus according to the present invention efficiently accumulates charges in respective electrodes, using a driving signal supplied in a second set-down period, to prevent a flickering erroneous discharge caused by deficiency of wall charges. As a result, the plasma display apparatus can improve picture quality of a display image. | 03-25-2010 |
20100073343 | LIQUID CRYSTAL DISPLAY DEVICE - A LCD device, in which a multi-grayscale level state is produced in a liquid crystal layer by applying a different voltage thereto, includes a liquid crystal display panel having the liquid crystal layer between first and second electrodes, an electrode drive circuit applying drive voltage pulses generated from multi-voltage power sources to the first and the second electrodes, and a multi-voltage power generator circuit. The LCD device further includes a multi-voltage power switch circuit supplying the first or the second multi-voltage power sources from the first or the second multi-voltage power units to the electrode drive circuit, and a control circuit, in a first drive step, setting the first multi-voltage power unit to an active state, and, in a second drive step, setting the second multi-voltage power unit to the active state. | 03-25-2010 |
20100079430 | Display panel module and electronic apparatus - A self-light-emission-type display panel module employs: a pixel array section including pixel areas laid out to form a two dimensional matrix in a display area to serve as pixel areas each having a signal holding capacitor, a device driving transistor, and a signal sampling transistor; a first driving section; a second driving section; and a third driving section. | 04-01-2010 |
20100156871 | Temperature-compensation networks - Temperature-compensation network embodiments are provided to generate compensation signals which may be useful in improving the performance of a variety of important systems. An embodiment includes a limit current mirror configured to provide a limit current, a current generator to provide a slope current whose magnitude varies with temperature, and an output current mirror positioned to receive the limit current and the slope current and configured to provide a compensation current. In addition, a floating voltage reference is provided for use in various networks which include the temperature-compensation networks. The temperature-compensation networks may be used to improve performance in systems such as a panel driver which provides turn-on and turn-off gate voltages to transistors in liquid crystal displays. | 06-24-2010 |
20110043504 | Display Apparatus and Method of Driving the Same - In a display apparatus and a method of driving the same, microshutters are successively arranged and each microshutter includes a plurality of sub-microshutters that are opened to transmit light or closed to block light in response to a voltage. The sub-microshutters are opened or closed during predetermined different time periods to display various gray scales. | 02-24-2011 |
20110193843 | Display device and electronic apparatus - A transistor connected to a power source for driving a light-emitting element driving transistor and a transistor setting to a predetermined voltage a source voltage of the light-emitting element driving transistor are commonly controlled by a control signal that takes one of three levels. | 08-11-2011 |
20110279428 | SWITCH DEVICE FOR SOURCE DRIVER OF LIQUID CRYSTAL DISPLAY AND OPERATING METHOD THEREOF - A switch device for source drivers of liquid crystal displays includes a first switch module; a first switch; a second switch; a second switch module; a third switch module; a fourth switch module; a third switch; and a fourth switch; wherein when a first driving signal with a voltage level between a first voltage level and a second voltage level through the second switch module is sent to a second output terminal and a second driving signal with a voltage level between a third voltage level and a fourth voltage level through the third switch module is sent to a first output terminal, the first switch is turned on such that a first node is connected to a first voltage source with the first voltage level and the fourth switch is turned on such that a second node is connected to a fourth voltage source with the fourth voltage level. | 11-17-2011 |
20110316832 | PIXEL DRIVE SCHEME HAVING IMPROVED RELEASE CHARACTERISTICS - Electromechanical devices such as MEMS can be controlled by “drive schemes” comprising electrical signals applied to the display to cause selective actuation or release of the electromechanical devices. In some drive schemes, all pixels on a line are released during a phase when a release voltage is applied along the common line. In some invention embodiments, the release phase sets the common line voltage to the maximum segment drive voltage for a portion of the release phase and the minimum segment drive voltage for the remainder of the release phase. This ensures that all electromechanical devices have a resulting voltage of zero during a portion of the release phase sufficient to release the devices without regard to the segment line voltages. This scheme eliminates slow and no release problems and also eliminates the need for additional voltage transitions on the segment lines. | 12-29-2011 |
20120019497 | LIQUID CRYSTAL DISPLAY AND METHOD OF DRIVING THE SAME - A liquid crystal display wherein power consumption of a gate drive circuit is reduced and a method of driving the same are disclosed. The liquid crystal display includes a liquid crystal panel having pixel regions defined by intersection of a plurality of gate lines and a plurality of data lines, a timing controller to output a clock pulse selectively having a first voltage level, second voltage level and third voltage level of different voltage levels and a data control signal, a gate drive unit to drive the gate lines in response to the clock pulse, and a data drive unit to drive the data lines in response to the data control signal. | 01-26-2012 |
20120086690 | PLASMA DISPLAY PANEL DRIVE METHOD AND PLASMA DISPLAY DEVICE - Forced initializing operation is omitted while address operation is performed stably, light emission related to no gradation display is eliminated, and the contrast is largely improved. In an erasing period, erasing discharge is selectively caused only in the discharge cell having undergone address discharge in the immediately preceding address period. It is assumed that first voltage is derived by subtracting voltage applied to a data electrode from low-side voltage of a sustain pulse, second voltage is derived by subtracting voltage applied to the data electrode from high-side voltage of the sustain pulse, and third voltage is derived by subtracting low-side voltage of an address pulse applied to the data electrode from low-side voltage of a scan pulse. The voltage derived by subtracting the third voltage from the first voltage is not lower than a discharge start voltage w here t he data electrode is used as the positive electrode and the scan electrode is used as the negative electrode. The voltage derived by subtracting the third voltage from the second voltage does not exceed the sum of a discharge start voltage where the data electrode is used as the positive electrode and the scan electrode is used as the negative electrode and a discharge start voltage where the data electrode is used as the negative electrode and the scan electrode is used as the positive electrode. | 04-12-2012 |
20130082996 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A driving apparatus for a display device includes: a signal controller that generates a pre-clock signal, a charge sharing control signal and a scanning start signal; a clock signal generator that generates a clock signal swinging between a first voltage and a second voltage based on the pre-clock signal and the charge sharing control signal; and a gate driver that generates gate signals based on the scanning start signal and the clock signal, where the clock signal generator includes: a voltage generator that generates a third voltage; and a clock generator that receives one of the first to third voltages in response to the pre-clock signal and the charge sharing control signal, and outputs an output signal based on the one of the first to third voltages as the clock signal, where the third voltage is lower than the first voltage and higher than the second voltage. | 04-04-2013 |
20140049530 | DISPLAY DEVICE AND ELECTRONIC APPARATUS - A transistor connected to a power source for driving a light-emitting element driving transistor and a transistor setting to a predetermined voltage a source voltage of the light-emitting element driving transistor are commonly controlled by a control signal that takes one of three levels. | 02-20-2014 |
20140347337 | DISPLAY DEVICE AND ELECTRONIC APPARATUS - A transistor connected to a power source for driving a light-emitting element driving transistor and a transistor setting to a predetermined voltage a source voltage of the light-emitting element driving transistor are commonly controlled by a control signal that takes one of three levels. | 11-27-2014 |
20160055818 | DISPLAY DEVICE - A display device includes: a plurality of gate lines; and a gate driver including a plurality of stages which transmits a gate voltage to the gate lines, where first to fourth clock signals and first to fourth inverted clock signals having phases opposite to phases of the first to fourth clock signals, respectively, are sequentially input to each repetition unit of the stages, where each repetition unit is defined by eight consecutive stages, a carry signal output by a j-th stage is transmitted to a (j+4)th stage, and a carry signal output by the (j+4)th stage is transmitted to the j-th stage, where j is a natural number. | 02-25-2016 |
20160133215 | DRIVING METHOD OF DISPLAY PANEL, DRIVING UNIT OF DISPLAY PANEL AND DISPLAY DEVICE HAVING THE SAME - A driving unit of display panel includes a data driving part, a timing controlling part and a gate driving part. The data driving part is configured to receive reference image data and includes a first data driving circuit part having a first channel outputting a first reference data signal based on the reference image data and a k-th channel outputting a k-th reference data signal based on the reference image data. The timing controlling part is configured to detect a time difference between the first reference data signal and the k-th reference data signal. The gate driving part is configured to output a gate signal to each of gate lines. By delaying data signals based on the gate signal delay caused by long line load and RC delay, the present invention may improve display quality of a display device. | 05-12-2016 |
20160189598 | GATE DRIVER AND DISPLAY APPARATUS HAVING THE SAME - Each stage of a gate driver includes a controlling part which increases an electric potential of a boosting line in response to a carry signal of a previous stage and decreases the electric potential of the boosting line in response to the carry signal of a next stage, a first output part which turns on in response to the increased electric potential of the boosting line and receiving a clock signal to output a gate signal of a present stage, and a second output part which turns on in response to the increased electric potential of the boosting line and receiving the clock signal to output the carry signal of the present stage. The boosting line of the present stage is disposed adjacent to a gate line which is connected to one of next stages following the present stage. | 06-30-2016 |