Patent application number | Description | Published |
20110057864 | Emission control driver and organic light emitting display using the same - An emission control driver including a plurality of stages, each including a first unit adapted to generate a first output signal at a first node thereof based on an input signal, a clock signal, a inverted input signal, first and second power source voltages, a second unit adapted to output an emission control signal based on the first output signal and the input signal, a third unit adapted to transmit the first or second power source to the first unit based on the emission control signal, a inverted clock signal and an inverted emission control signal when a first path between the first power source and the first node and a second path between the second power source and the first node are blocked by the clock signal, and a fourth unit adapted to output a inverted emission control signal based on the emission control signal and the first output signal. | 03-10-2011 |
20110076599 | APPARATUS AND METHOD FOR ALIGNING MASK - An apparatus and method for aligning a mask that includes disposing and firstly aligning a mask over a first substrate, with a space interposed therebetween, bringing the mask into contact with the first substrate and then measuring the alignment state of the mask with respect to the first substrate to detect an alignment error, secondly aligning the mask with respect to the first substrate based on the alignment error, transferring the first substrate to the next process, disposing and thirdly aligning the mask over a second substrate with the space interposed therebetween, and bringing the mask into contact with the second substrate. | 03-31-2011 |
20110080395 | PIXEL CIRCUIT, ORGANIC ELECTRO-LUMINESCENT DISPLAY APPARATUS USING THE PIXEL CIRCUIT AND METHOD OF DRIVING THE APPARATUS - An organic electroluminescent display apparatus including a pixel circuit and a method of driving the organic electroluminescent display apparatus are provided. Embodiments of the present invention may solve problems where the luminance of light is changed due to a change of a voltage of an anode of an organic electro-light emitting device such that an image quality is deteriorated when N-type transistors are used to form the organic electroluminescent display apparatus. | 04-07-2011 |
20110115764 | Pixel Circuit and Organic Electroluminescent Display Apparatus Using the Same - An improved pixel circuit including N-type transistors is provided. The pixel circuit includes a light emitting device driven by a driving current according to a gate voltage of a driving transistor. The pixel circuit also includes a first capacitor, a second transistor for transferring a data signal to a first terminal of the first capacitor in response to a scan control signal, a third transistor for diode-connecting the driving transistor in response to the scan control signal, a fourth transistor for applying a first power voltage to a first electrode of the driving transistor in response to an emission control signal, a fifth transistor for applying a sustain voltage to the first terminal of the first capacitor in response to the emission control signal, and a sixth transistor for applying the first power voltage to a second terminal of the first capacitor in response to an initialization control signal. | 05-19-2011 |
20110115772 | Pixel Circuit and Organic Electroluminescent Display Apparatus Using the Same - An improved pixel circuit is provided. The pixel circuit includes a light emitting device driven by a drive current according to a voltage applied to a gate electrode of a driving transistor. The pixel circuit also includes a first capacitor, a second transistor for transferring a data signal to a first terminal of the first capacitor in response to a scan control signal applied to a gate electrode of the second transistor, a third transistor for diode-connecting the driving transistor in response to a scan control signal applied to a gate electrode of the third transistor, a fourth transistor for applying a first power voltage to the first electrode of the driving transistor in response to an emission control signal, and a fifth transistor for applying a sustain voltage to a first terminal of the first capacitor in response to the emission control signal. The driving transistor and the second to fifth transistors are N-type transistors. | 05-19-2011 |
20110164017 | SCAN DRIVER AND FLAT PANEL DISPLAY DEVICE INCLUDING THE SAME - A scan driver includes a plurality of stages. Each of the plurality of stages includes an odd-numbered scan unit, an even-numbered scan unit, and a signal shift unit. The scan driver can selectively perform progressive scan and interlaced scan by varying logic levels of mode signals and clock signals applied to the stages. | 07-07-2011 |
20110227883 | SCAN DRIVER AND ORGANIC LIGHT EMITTING DISPLAY USING THE SCAN DRIVER - A scan driver includes a plurality of stages for receiving a first start signal and a second start signal, a first clock signal and a second clock signal, and at least one of two interrupt signals and outputting a scan signal. Each stage includes an up-signal output unit for receiving the first start signal and for outputting a first output signal that is shifted by one horizontal period from the first start signal, a down-signal output unit for receiving a second start signal and outputting a second output signal shifted by one horizontal period from the second start signal, and a scan signal output unit for receiving the first and second output signals and outputting a high-level or low-level scan signal. | 09-22-2011 |
20110227884 | SCAN DRIVER AND ORGANIC LIGHT EMITTING DISPLAY USING THE SCAN DRIVER - A scan driver is coupled to a plurality of scan lines and includes a plurality of stages. Each of the stages is configured to sequentially receives clock signals that are phase delayed by two horizontal cycles or more from three of a plurality of clock lines, and output a scan signal having a pulse width of two horizontal cycles or more to a corresponding scan line. The scan signals are overlapped with each other by one horizontal cycle or more. | 09-22-2011 |
20110285752 | Light emission control driver, light emitting display device using the same, and methodfor driving light emission control signal - A light emission control driver includes a first logic unit configured to receive a plurality of clock signals and a first input signal and generate a first output signal; a second logic unit configured to receive a plurality of clock signals and a second input signal and generate a second output signal; and an output controller configured to receive the first output signal, the second output signal, a first control signal, and a second control signal, and generate a light emission control signal. When a driving scheme of a display unit is a simultaneous light emission mode, the light emission control signal is controlled according to driving of the output controller, and, when the driving scheme of the display unit is a progressive light emission mode, the light emission control signal is controlled according to driving of the first logic unit, the second logic unit, and the output controller. | 11-24-2011 |
20120013588 | Display, Scan Driving Apparatus for the Display, and Driving Method Thereof - A scan driving apparatus includes a first driving apparatus connected to a plurality of scan lines and a second driving apparatus connected to the plurality of scan lines. Wherein when one of the first driving apparatus and the second driving apparatus is in a scan enable state such that the plurality of scan lines are applied with a scan signal, the other is in a floating state such that the output terminal is floated. The scan driving apparatus according to the present invention has the function of a shift register for sequentially applying the scan signals and may apply a scan signal of a different waveform which is additionally required. The output terminal of the scan driving apparatus is floated in a period in which a different waveform is necessary such that a scan signal having the different waveform may be applied without influence of the scan signal, thereby realizing a complicated scan signal. | 01-19-2012 |
20120044240 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - There is provided a method of driving an organic light emitting display capable of minimizing or reducing the amount of instantaneously current flowing in the display that is driven in a concurrent emission method. The method includes setting pixels included in j blocks of a panel in a non-emission state, charging the pixels with voltages corresponding to data signals, and emitting light by the pixels in units of horizontal lines respectively included in the j blocks to correspond to the charged voltages. | 02-23-2012 |
20120133626 | Scan driver and method of driving the same - A scan driver of a display device may include a plurality of scan lines. The scan driver may include a plurality of stages configured to transmit scan signals to the scan lines. Each stage may include an input terminal for receiving a scan signal from a previous stage, an output terminal, an output unit, a sequential switching unit, and a simultaneous switching unit. The output unit may be coupled to the output terminal, and outputs a corresponding scan signal to the output terminal. The sequential switching unit may be coupled to the input terminal, and controls the output unit such that the output unit of each stage sequentially outputs the scan signals having a first voltage in a first period. The simultaneous switching unit may control the output unit such that the output unit of each stage simultaneously output the scan signals having a predetermined voltage in a second period. | 05-31-2012 |
20130002306 | STAGE CIRCUIT AND SCAN DRIVER USING THE SAME - A stage circuit includes an output unit including a first transistor coupled between a first power source and an output terminal of the stage circuit, and having a gate electrode coupled to a first node, a second transistor coupled between the output terminal and a third input terminal of the stage circuit, and having a gate electrode coupled to a second node, and a third transistor coupled between the output terminal and a second power source, and having a gate electrode coupled to a third node; a progressive driver coupled to first, second, and sixth input terminals of the stage circuit; and a concurrent driver coupled to at least one of fourth and fifth input terminals of the stage circuit. In the stage circuit, clock signals supplied to the first, second, and third input terminals during the second period are concurrently set to a gate-on or gate-off voltage. | 01-03-2013 |
20130002630 | Scan driver and organic light emitting display using the same - Embodiments may provide a scan driver including a plurality of stages for simultaneously outputting first scan signals in a simultaneous driving period and for progressively outputting second scan signals in a progressive driving period, wherein each of the stages includes a first signal processing unit coupled to an input terminal, a first clock terminal, a third clock terminal, an auxiliary terminal, a first power source terminal, and a second power source terminal to output a first output signal and a second output signal, and a second signal processing unit coupled to a second clock terminal and the first power source terminal to receive the first output signal and the second output signal and to output a first scan signal and a second scan signal to an output terminal. | 01-03-2013 |
20130120346 | SCAN DRIVING DEVICE AND DRIVING METHOD THEREOF - A scan driving device including scan driving blocks including a first node receiving a second-voltage according to a signal input to a first-input terminal, a second node receiving a first-voltage according to a signal input to the first-input terminal, and receiving an input signal according to a clock signal input to a second-input terminal, a first transistor connected to the first node, the first power source, and an output terminal, and a second transistor connected to the second node and the output terminal and configured to receive a clock signal input to a third-input terminal, wherein, during the initial driving period, the input signal is applied with a gate-off-voltage, and clock signals input to the first-, second-, and third-input terminals are applied with a gate-on-voltage to reset a voltage at the first node with the gate-on-voltage and reset a voltage at the second node with the gate-off-voltage. | 05-16-2013 |
20130321032 | STAGE CIRCUITS AND SCAN DRIVER USING THE SAME - There are provided stage circuits and a scan driver using the same, which can supply scan signals using a simultaneous method or an interlace method. Each of the stage circuits includes a progressive driver and a simultaneous driver. The progressive driver outputs a scan signal to an output terminal, corresponding to a plurality of clock signals supplied simultaneously or progressively, and the coupling between the progressive driver and the output terminal is blocked when a third control signal is supplied. The simultaneous driver outputs a scan signal to the output terminal, corresponding to first and second control signals which do not overlap each other, and the coupling between the simultaneous driver and the output terminal is blocked when a fourth control signal, which does not overlap the third control signal, is supplied. | 12-05-2013 |
20140192037 | PIXEL, DISPLAY DEVICE COMPRISING THE PIXEL AND DRIVING METHOD OF THE DISPLAY DEVICE - A display device includes a data driver; a scan driver; a compensation control signal unit configured to reset voltages of data signals transmitted to a plurality of pixels during a previous frame at a current frame, and configured to generate and transmit a first control signal to compensate for threshold voltages of driving transistors of the pixels and a second control signal to control simultaneous light emission of the pixels; a power controller configured to control and supply the voltage levels of a first and second power source voltages; a display unit including the plurality of pixels coupled to corresponding data lines, scan lines, first control lines, second control lines, first voltage lines, and second voltage lines; and a timing controller configured to generate a plurality of data signals by processing external image signals and generate a plurality of driving control signals for controlling driving of the drivers. | 07-10-2014 |