Patent application number | Description | Published |
20130002340 | STAGE CIRCUIT AND SCAN DRIVER USING THE SAME - A stage circuit is capable of concurrently or progressively supplying scan signals. The stage circuit includes a progressive driver including a first transistor and a second transistor, and a concurrent driver including an 11 | 01-03-2013 |
20130120326 | SCAN DRIVING DEVICE AND METHOD OF DRIVING THE SAME - A scan driving device includes scan driving blocks, each including: a first node receiving a signal that is input to a first driving signal input terminal according to a clock signal input to a first clock signal input terminal; a second node receiving a second power source voltage according to the clock signal input to the first clock signal input terminal and a signal input to a second driving signal input terminal; a first transistor including a gate electrode connected to the second node and an electrode receiving an output control signal; a second transistor including a gate electrode connected to the first node and an electrode connected to a second clock signal input terminal; and a third transistor including a gate electrode connected to the second node, an electrode connected to a first power source voltage, and another electrode connected to the first node. | 05-16-2013 |
20130127807 | SCAN DRIVER AND DRIVING METHOD THEREOF - A scan driver including sequentially arranged scan driving blocks, each of the blocks including a first node receiving a signal input into a driving signal input terminal based on a clock signal input into a second-clock-signal input terminal, a second node receiving a clock signal input into a first-clock-signal input terminal, a first transistor including a gate electrode connected to the second node, one electrode receiving an output control signal, and another electrode connected to an output terminal, a second transistor including a gate electrode connected to the first node, one electrode connected to a third-clock-signal input terminal, and another electrode connected to the output terminal, and a third transistor including a gate electrode connected to the third-clock-signal input terminal and one electrode connected to the first node and configured to transfer a voltage of the output terminal to the first node. | 05-23-2013 |
20130181967 | Organic Light Emitting Display Device, System Including Organic Light Emitting Display Device and Method of Driving Organic Light Emitting Display Device - An organic light emitting display device includes a pixel unit, a scan driver, a data driver and a voltage generation unit. The pixel unit includes a plurality of pixels coupled to a plurality of scan lines and a plurality of data lines, where each of the pixels includes an organic light emitting diode. The voltage generation unit is coupled to the pixel unit through one power line which provides the common supply voltage to the pixels. Each of the plurality of pixels includes a voltage drop unit, each voltage drop unit generates a respective drive voltage by dropping a voltage of the common supply voltage, and turns on the organic light emitting diode to emit light with a luminance corresponding to a voltage of the drive voltage based on a logic level of the data signal. The organic light emitting display device increases an aperture ratio. | 07-18-2013 |
20130321376 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel and an organic light emitting display device using the same, which can improve display quality, are provided. An organic light emitting display device includes pixels, an emission control line, an initial power supply unit, a scan driver and a data driver. The pixels are at intersection portions of scan lines and data lines. The emission control line is commonly coupled to the pixels. The initial power supply unit is commonly coupled to gate electrodes of one or more transistors included in each of the pixels, and supplies a first voltage during a first period, a second voltage lower than the first voltage during a second period, and a third voltage higher than the first voltage during a third period in one frame period. The scan driver drives the scan lines and the emission control line. The data driver drives the data lines. | 12-05-2013 |
20140049455 | ORGANIC LIGHT EMITTING DIODE DISPLAY - An organic light emitting diode display including a substrate, a scan line transferring a scan signal, a compensation control line transferring a compensation control signal, an operation control line applying an operation control signal, a data line and a driving voltage line transferring a data signal and a driving voltage, respectively, a switching thin film transistor (TFT) connected to the scan line and the data line, a compensation TFT and an initialization TFT connected to the compensation control line, an operation control TFT connected to the operation control line and the switching TFT, a driving TFT connected to the driving voltage line, an organic light emitting diode connected to a drain electrode of the driving TFT, and a hold capacitor connected between a source electrode of the operation control TFT and a gate electrode of the initialization TFT. | 02-20-2014 |
20140070709 | METHOD OF ARRANGING POWER-LINES FOR AN ORGANIC LIGHT EMITTING DISPLAY DEVICE, DISPLAY PANEL MODULE, AND ORGANIC LIGHT EMITTING DISPLAY DEVICE HAVING THE SAME - A method of arranging power-lines between a power supply circuit and a display panel in an organic light emitting display device, the method including: substantially symmetrically arranging first high power-lines between the power supply circuit and the display panel, the first high power-lines being configured to concurrently transmit a first high power voltage to first pixels; substantially symmetrically arranging second high power-lines outside of the first high power-lines between the power supply circuit and the display panel, the second high power-lines being configured to concurrently transmit a second high power voltage to second pixels; and substantially symmetrically arranging third high power-lines outside of the second high power-lines between the power supply circuit and the display panel, the third high power-lines being configured to concurrently transmit a third high power voltage to third pixels. | 03-13-2014 |
20140139408 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel includes an organic light emitting diode (OLED), a first transistor having a gate electrode coupled to a first node, a first electrode coupled to a first power supply, and a second electrode coupled to the OLED, a first capacitor for storing a data signal, and a second capacitor coupled between the first node and the second electrode of the first transistor to charge a voltage corresponding to the data signal and a threshold voltage of the first transistor, wherein, in a period where a voltage stored in the first capacitor is supplied to the first node, the second capacitor is electrically blocked from the first node. | 05-22-2014 |
20140168179 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - An organic light emitting display capable of improving display quality. The organic light emitting display includes a data driver for supplying bias power supply to data lines in a first period of one frame, for supplying reference power supply in a second period, and for supplying data signals in a fourth period, a scan driver for sequentially supplying scan signals to scan lines in the fourth period, pixels positioned at intersections of the scan lines and the data lines, and a first control line, a second control line, a third control line, and a fourth control line commonly coupled to the pixels. Each of the pixels includes a first capacitor for previously charging voltages corresponding to the data signals and a second capacitor charged by a voltage of the first capacitor in a third period between the second period and the fourth period. | 06-19-2014 |
20140198085 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel includes an organic light emitting diode, a first driver and a second driver. The second driver controls an amount of current supplied from a first power source to the organic light emitting diode, corresponding to a previous data signal. The first driver stores a current data signal supplied from a data line and supplies the previous data signal to the second driver. In the pixel, the second driver includes a sixth transistor coupled between an initialization power source and a first node coupled to a gate electrode of a first transistor, the sixth transistor being configured to turn on when a first control signal is supplied; and a seventh transistor coupled between the first power source and a second node commonly coupled to the first and second drivers, the seventh transistor being configured to turn on when the first control signal is supplied. | 07-17-2014 |
20140210807 | CIRCUIT FOR PREVENTING STATIC ELECTRICITY AND DISPLAY DEVICE HAVING THE SAME - A static electricity prevention circuit of a display device including: a driving circuit configured to drive a display unit that displays an image, at least one clock signal wire configured to transmit a clock signal to the driving circuit, at least one transistor electrically coupled to the dock signal wire, and at least one capacitor including a first electrode coupled to a source electrode and to a drain electrode of the transistor, and a second electrode configured to be maintained at a voltage, | 07-31-2014 |
20140313106 | ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE AND DRIVING METHOD THEREOF - An organic light emitting diode (OLED) display device includes a plurality of pixels each having a pixel circuit and an organic light emitting diode coupled to the pixel circuit. The OLED display device includes a scan driver which is configured to supply a scan signal to the scan lines and to supply an emission control signal to an emission control line commonly coupled to the pixels. The OLED display device also includes repair lines and repair circuits coupled to the repair lines. The repair circuits each have an output terminal coupled to an organic light emitting diode in corresponding pixel. A switching unit is configured to allow output lines of the data driver to be selectively coupled to the repair lines or the data lines. | 10-23-2014 |
20140333600 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel circuit for an organic light emitting diode (OLED) display is disclosed. One inventive aspect includes an organic light emitting diode, a first transistor, a second transistor, a first capacitor connected to a second node and a fixed voltage source, a third transistor, a fourth transistor, a second capacitor connected to the fourth transistor and a third node, a first control transistor and a second control transistor. The fourth transistor is connected to the first and third nodes and is turned off when an emission control signal is supplied to an emission control line and turned on otherwise. The first control transistor is connected to the third node and the first power source and is turned on when a first control signal is supplied. | 11-13-2014 |
20140353608 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - There is provided a pixel, including an organic light emitting diode (OLED), a first transistor whose gate electrode is coupled to a first node, whose first electrode is coupled to a first power supply via a third node, and whose second electrode is coupled to an anode electrode of the OLED, a second transistor coupled between a data line and a second node and turned on when a scan signal is supplied to a scan line, a first capacitor coupled between the second node and a first voltage source, a third transistor coupled between the second node and the first node and turned on when a second control signal is supplied, and a fourth transistor coupled between the first node and the first power supply and turned on when a first control signal is supplied. | 12-04-2014 |
20140354522 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A method of driving an OLED display includes: during a scanning period of a first frame, turning off a relay transistor and turning on a switching transistor to enable a second data voltage applied to a data line to be stored in a first capacitor; and during a light emitting period of the first frame, performing an operation to turn on a light emitting transistor and a compensation transistor to enable a voltage into which a first data voltage and a threshold voltage of a driving transistor are reflected to be applied to a second node for enabling the OLED to emit light by a driving current which flows into a driving transistor. The scanning period and the light emitting period temporally overlap each other. | 12-04-2014 |
20140355733 | STAGE CIRCUIT AND SCAN DRIVER USING THE SAME - A stage circuit and a scan driver, the stage circuit including a switch unit configured to selectively electrically couple a first node to one of a first input terminal and a second input terminal, a first driver coupled to the first node, to a second node, to a third node, to a first clock terminal, and to a second clock terminal, and a second driver coupled to the second node, to the third node, to a third clock terminal, and to a common terminal, and configured to output a scan signal to an output terminal. | 12-04-2014 |
20150035732 | STAGE AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A stage includes an output unit configured to supply a scan signal to an output terminal according to voltages of first and second nodes; a first driver configured to control the voltages of the first and second nodes so that when a start signal or an output signal of a previous stage is supplied to a first input terminal, the scan signal is supplied from the output unit; and a second driver configured to control the voltages of the first and second nodes, corresponding to signals supplied to a second input terminal, a fourth input terminal and a fifth input terminal, wherein the second driver comprises eighth and ninth transistors coupled in series between the output terminal and the second node, and wherein a gate electrode of the eighth transistor is coupled to the first node, and a gate electrode of the ninth transistor is coupled to the fourth input terminal. | 02-05-2015 |