Patent application number | Description | Published |
20090302332 | SEMICONDUCTOR CIRCUIT HAVING CAPACITOR AND THIN FILM TRANSISTOR, FLAT PANEL DISPLAY INCLUDING THE SEMICONDUCTOR CIRCUIT, AND METHOD OF MANUFACTURING THE SEMICONDUCTOR CIRCUIT - A flat panel display including a semiconductor circuit, and a method of manufacturing the semiconductor circuit are disclosed. In one embodiment, the semiconductor circuit includes i) a substrate, ii) a semiconductor layer and a first capacitor electrode formed on the substrate, the first capacitor electrode being doped to be conductive, iii) an insulating layer covering the semiconductor layer and the first capacitor electrode, iv) a gate electrode disposed on the insulating layer and corresponding to a portion of the semiconductor layer, and v) a second capacitor electrode disposed on the insulating layer and corresponding to the first capacitor electrode, wherein the gate electrode is thicker than the second capacitor electrode. | 12-10-2009 |
20100220038 | Pixel and Organic Light Emitting Display Device Including the Same - A pixel includes: an organic light emitting diode coupled between a first power supply and a second power supply; a first transistor coupled between the organic light emitting diode and the second power supply; a second transistor coupled to a first node to which a gate electrode of the first transistor is coupled; a first capacitor coupled between the first node and a second node; a third transistor coupled between the second node and a data line; a fourth transistor coupled between the first node and the second node; a fifth transistor coupled between the first transistor and the second power supply; and a second capacitor coupled between the second node and a third node between the first transistor and the fifth transistor. | 09-02-2010 |
20100245402 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device compensates for a variation of the threshold voltage of a driving transistor. A scan driver and a data driver drive a plurality of pixels. A pixel of the pixels includes an organic light emitting diode, four transistors, and two capacitors. A first transistor controls a current to the organic light emitting diode. Second and third transistors are coupled between a data line from the data driver and a gate electrode of the first transistor. A fourth transistor is coupled between a reference power supply and the gate electrode of the first transistor. The two capacitors are coupled between the organic light emitting diode and respective electrodes of the third transistor. | 09-30-2010 |
20100265165 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device capable of improving image quality on a large panel. The organic light emitting display device includes a panel divided into at least two regions including a first region crystallized by a first crystallization process and a second region crystallized by a second crystallization process, in which a boundary part of the first and second regions is subject to both the first crystallization process and the second crystallization process, and further includes: organic light emitting diodes at crossing regions of scan lines and data lines; and pixel circuits at the crossing regions and configured to supply currents to the organic light emitting diodes. Here, couplings between the pixel circuits within the first region and the boundary part and their respective organic light emitting diodes are different from couplings between the pixel circuits within the second region and their respective organic light emitting diodes. | 10-21-2010 |
20100265166 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE PIXEL - A pixel includes an organic light emitting diode; a first transistor; a second transistor coupled to a data line and turned on when a scan signal is supplied to an i | 10-21-2010 |
20100309187 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel includes an organic light emitting diode (OLED) having a cathode electrode coupled to a second power source, a first transistor for controlling an amount of current that flows from a first power source to the second power source via the OLED corresponding to a data signal, a second transistor coupled between a data line and a gate electrode of the first transistor, a third transistor coupled between the gate electrode of the first transistor and a reference power source, a fourth transistor coupled between the third transistor and the reference power source, a fifth transistor coupled between an anode electrode of the OLED and an initial power source, a first capacitor coupled between the anode electrode of the OLED and a node between the third transistor and the fourth transistor, and a second capacitor coupled between the node and the gate electrode of the first transistor. | 12-09-2010 |
20110090200 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - An organic light emitting display device includes: a plurality of pixels at crossing regions of a plurality of scan lines and data lines; a first control line and a second control line commonly connected with the plurality of pixels; a control line driver configured to supply a first control signal to the first control line and a second control signal to the second control line, where the second control signal is not concurrent with the first control signal; and a first power supply that supplies a first power to each of the plurality of pixels, where a voltage level of the first power is configured to change at least once during a frame period for each of the pixels. | 04-21-2011 |
20110157143 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel capable of displaying images with substantially uniform luminance and an organic light emitting display device using the same are provided. An organic light emitting display device is driven in a frame divided into a reset period, a compensation period and an emission period. The organic light emitting display device includes pixels coupled to scan lines and data lines. First and second control lines are commonly coupled to the pixels. A control line driver supplies first and second control signals to the respective first and second control lines. A scan driver concurrently supplies a scan signal to the scan lines during a time in the reset and compensation periods. A data driver supplies a reset voltage to the data lines during the time in the reset and compensation periods. | 06-30-2011 |
20110164016 | PIXEL CIRCUIT, ORGANIC LIGHT EMITTING DISPLAY, AND DRIVING METHOD THEREOF - A pixel circuit includes: an OLED; a second transistor including gate, first, and second terminals coupled to a first scan line, a data line, and a first node, respectively; a fourth transistor including gate, first, and second terminals coupled to a third scan line, the first node, and a second node, respectively; a third transistor including gate, first, and second terminals coupled to a second scan line, a reference power source, and the second node, respectively; a fifth transistor including gate, first, and second terminals coupled to a light emission control line, a third node, and an anode of the OLED, respectively; a first capacitor coupled between the first and second nodes; a second capacitor coupled between the second and third nodes; and a first transistor including gate, first, and second terminals coupled to the first node, a first power source, and the third node, respectively. | 07-07-2011 |
20110164018 | PIXEL CIRCUIT, AND ORGANIC LIGHT EMITTING DISPLAY, AND DRIVING METHOD THEREOF - A pixel circuit including an organic light emitting diode. Also, the pixel circuit includes: a second transistor connected to a first scanning line, a data line, and a first node; a fifth transistor connected to a third scanning line, the first node, and a second node; a fourth transistor connected to a second scanning line, a first reference voltage, and the second node; a third transistor connected to the first scanning line, a second reference voltage, and a third node; a first capacitor connected between the first node and the second node; a second capacitor connected between the second node and the third node; and a first transistor connected to the first node, a first power, and the third node, and configured to drive the organic light emitting diode. | 07-07-2011 |
20110193768 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel includes: an OLED; a first transistor having a first electrode coupled to a power source and a second electrode coupled to the OLED and configured to control a magnitude of current supplied to the OLED; a third transistor having a first electrode coupled a first node and a second electrode coupled to a gate electrode of the first transistor; a capacitor coupled between the first node and a second electrode of the first transistor; a second transistor having a first electrode coupled to the first node and a second electrode coupled to a data line and configured to be turned on when the third transistor is turned off; and a fourth transistor having a first electrode coupled to a gate electrode of the first transistor and a second electrode coupled to a reference power source and configured to be turned on and off concurrently with the second transistor. | 08-11-2011 |
20110227956 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - An organic light emitting display device is capable of securing sufficient compensation period such that a threshold voltage of a driving transistor may be compensated. A pixel includes: an organic light emitting diode; a second transistor for controlling an amount of current supplied from a first power source to the organic light emitting diode; a first capacitor having a first terminal coupled to a gate electrode of the second transistor; a first transistor coupled between a second terminal of the first capacitor and a data line, and being configured to turn on when a scan signal is supplied to a scan line; and a third transistor coupled between a gate electrode and a second electrode of the second transistor and having a turning-on period that is not overlapped with that of the first transistor. The third transistor is configured to turn on for a longer time than the first transistor. | 09-22-2011 |
20110241562 | ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE - An OLED display device includes a substrate; an organic light emitting element having a first electrode formed on the substrate, an organic emission layer disposed on the first electrode, and a second electrode disposed on the organic emission layer; a common power bus line disposed between the organic light emitting element and an edge of the substrate on the substrate and electrically connected with the first electrode; a driving power bus line neighboring the common power bus line on the substrate, disposed between the organic light emitting element and the edge of the substrate, and electrically connected with the second electrode extended from a portion corresponding to the organic emission layer; and a connection wire made of the same material as the second electrode on the common power bus line, separated from the second electrode, and electrically connected with the common power bus line. | 10-06-2011 |
20110310077 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel has a simple structure and compensates for a threshold voltage of a driving transistor. An organic light emitting display device includes the pixel, which includes: an organic light emitting diode; a first transistor having a second electrode coupled to the organic light emitting diode and a first electrode coupled to a data line; a second transistor between a gate electrode and the second electrode of the first transistor and turned on when a scan signal is supplied to a scan line; and a storage capacitor electrically coupled between the gate electrode of the first transistor and a first power supply. | 12-22-2011 |
20120019499 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device operates for an initializing period, a scan period and an emission period divided from one frame period. The organic light emitting display device includes: a data driver for supplying data signals to output lines; a connecting unit for selectively coupling a data line of data lines to a corresponding one of the output lines or an initial power supply, and being positioned between the output lines and the data lines; a second power driver for applying second power having a low level and a high level to pixels positioned at crossing regions of scan lines and the data lines; and a first control line commonly coupled to the pixels, in which each of the pixels includes an organic light emitting diode, and an anode electrode of the organic light emitting diode is supplied with a voltage of the initial power supply for the initializing period. | 01-26-2012 |
20120038606 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - An organic light emitting display includes a pixel unit having pixels coupled to scan lines, first control lines, second control lines, data lines, and first and second power sources, a control line driver for providing a first control signal and a second control signal to the pixels through the first control lines and the second control lines, a scan driver for providing scan signals to the pixels through the scan lines, and a data driver for providing data signals to the pixels through data lines. The scan driver simultaneously supplies a first scan signal to the pixels through the scan signals. In the organic light emitting display, deviation in the threshold voltages of the driving transistors included in the pixels is compensated without a power swing so as to display an image with uniform brightness. | 02-16-2012 |
20120038607 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - An organic light emitting display includes a pixel unit including pixels coupled to scan lines, control lines, data lines, and first and second power sources, a control line driver for providing control signals to the pixels through the control lines, a scan driver for providing scan signals to the pixels through the scan lines, a data driver for providing data signals to the pixels through data lines, and a first power source driver for applying the first power source to the pixels. The first power source driver sets the first power source as a voltage in a low level in a first period in one frame period. The first power source is set as a high level voltage in second and third periods in one frame period. Therefore, it is possible to compensate for deviation in the threshold voltages generated between the driving transistors included in the pixels. | 02-16-2012 |
20120038682 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - An organic light emitting display includes pixels coupled to scan lines, first control lines, second control lines, data lines, and first and second power sources. The organic light emitting display further includes a control line driver for providing a first control signal and a second control signal to the pixels through the first control lines and the second control lines, a scan driver for providing scan signals to the pixels through the scan lines, and a data driver for providing data signals to the pixels through data lines. The control line driver simultaneously supplies a first off control signal to the pixels through the first control lines in a first period, simultaneously supplies a reference voltage to the pixels through the first control lines in a second period, and simultaneously supplies a first on control signal to the pixels through the first control lines in a third period. | 02-16-2012 |
20120105399 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device for improving the yield and for reducing or minimizing manufacturing costs. The organic light emitting display device includes: a data driver coupled to data lines that are formed on the panel; a scan driver mounted on the panel and coupled to scan lines that are formed on the panel; input lines for receiving clock signals from the outside; first connecting lines overlapped with a cathode electrode and electrically coupled to the input lines and for supplying the clock signals to the scan driver; second connecting lines electrically coupled to the input lines; and third connecting lines for electrically coupling the first connecting lines to the second connecting lines. | 05-03-2012 |
20120105408 | Organic light emitting display - An organic light emitting display, in which one frame is divided into an initializing period, a compensation period, a scan period, and an emission period, includes pixels at intersections of scan lines and data lines, the pixels coupled to a first power source and a second power source, a scan driver simultaneously supplying scan signals to the scan lines for a partial period of the initializing period, the scan driver simultaneously supplying scan signals to the scan lines for the compensation period, and the scan driver sequentially supplying scan signals to the scan lines for the scan period, a data driver supplying data signals to the data lines in synchronization with the scan signals supplied for the scan period, and a first power source driver supplying the first power source, the first power source having different voltage levels for the initializing period, the scan period, and the emission period. | 05-03-2012 |
20120113077 | Pixel and organic light emitting display using the same - A pixel may include an organic light emitting diode (OLED) with a cathode electrode coupled to a second power source, a first transistor with a first electrode coupled to a data line, with a second electrode coupled to a first node, the first transistor being turned on when a scan signal is supplied to a scan line, a first capacitor coupled between the first node and a third power source to charge a first capacitor voltage corresponding to a data signal supplied from the data line, and a pixel circuit charged by the first capacitor voltage to supply current corresponding to a charged first power source voltage from a first power source to the second power source via the OLED. | 05-10-2012 |
20120206432 | INVERTER AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - An inverter is capable of improving the reliability of driving. The inverter includes a first transistor coupled between a first power source and an output terminal of the inverter and having a gate electrode coupled to a first input terminal of the inverter, a second transistor coupled between a second power source and the output terminal, and having a gate electrode coupled to a second input terminal of the inverter, a first capacitor coupled between the gate electrode of the first transistor and the first input terminal, a second capacitor coupled between the gate electrode of the second transistor and the second input terminal, a third transistor coupled between the gate electrode of the first transistor and a reset power source, and a fourth transistor coupled between the gate electrode of the second transistor and the reset power source. | 08-16-2012 |
20130002615 | STAGE CIRCUIT AND SCAN DRIVER USING THE SAME - A stage circuit includes a progressive driver and a concurrent driver, and a scan driver includes a plurality of stage circuits that are capable of supplying a scan signal to scan lines progressively and concurrently (e.g., simultaneously). | 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 |
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 |
20130141412 | Pixel Circuit, Organic Light Emitting Display Device, and Method of Driving the Pixel Circuit - A pixel circuit includes an OLED having a cathode coupled to a power source voltage, a first transistor having a second electrode coupled to an anode of the OLED, and a gate electrode coupled to a gate control-line, a second transistor having a second electrode coupled to a first electrode of the first transistor, a third transistor having a first electrode coupled to another power source voltage, a second electrode coupled to a first electrode of the second transistor, and a gate electrode coupled to a gate control-line, a fourth transistor having a first electrode coupled to a gate electrode of the second transistor, a second electrode coupled to the anode of the OLED, and a gate electrode coupled to a scan-line, and a capacitor coupled between the gate electrode of the second transistor and the second electrode of the third transistor. | 06-06-2013 |
Patent application number | Description | Published |
20080246029 | Thin film transistor, organic light emitting display device including the same, and method of manufacturing the organic light emitting display device - A thin film transistor, e.g., for use in an organic light emitting display, may include: a gate insulating layer disposed on a gate electrode located on a substrate; a semiconductor layer, disposed on the gate insulating layer; and a planarization layer disposed on the gate insulating layer, the source and drain electrodes, and the channel area, and having openings exposing parts of the first source and drain areas and the source and drain electrodes, respectively. The semiconductor layer may include: a channel area corresponding to the gate electrode; first source and drain areas doped with an impurity outside the channel area; second source and drain areas, including a metal, outside the first source and drain areas; and source and drain electrodes disposed on the second source and drain areas and exposing the first source and drain areas. A pixel electrode may be disposed in one of the openings. | 10-09-2008 |
20080246037 | Flat display device and method of manufacturing the same - Provided is a flat display device, and more particularly, an active matrix (AM) flat display device having a thin film transistor (TFT). The flat display device includes a substrate, a plurality of TFTs (thin film transistors) provided on the substrate, each TFT comprising an active layer, a source electrode and a drain electrode that contact the active layer, and an ohmic contact layer interposed between the active layer and the source and drain electrodes, and a light emitting device electrically connected to the TFT, wherein the ohmic contact layer and a layer including the source and drain electrodes are formed to have the same pattern. | 10-09-2008 |
20080277666 | Thin film transistor, organic light emitting display device including the same, and method of manufacturing the organic light emitting display device - A thin film transistor (TFT) may include a substrate, a gate electrode on the substrate, a gate insulating layer on the gate electrode, and a semiconductor layer on the gate insulating layer. The semiconductor layer may include a top surface, a channel area aligned in a vertical direction with the gate electrode, a plurality of doped areas proximate to the channel area, and a plurality of non-doped areas. Source and drain electrodes may be on the top surface of the semiconductor layer aligned above respective ones of the plurality of non-doped areas of the semiconductor layer. A planarization layer may be on the gate insulating layer, the source and drain electrodes and the semiconductor layer channel area, and may include a plurality of openings respectively exposing the plurality of doped areas of the semiconductor layer and a portion of the source electrode and the drain electrode. | 11-13-2008 |
20090039773 | ORGANIC LIGHT EMITTING DISPLAY APPARATUS AND METHOD OF MANUFACTURING THE SAME - An organic light emitting display apparatus including: a substrate; a thin film transistor formed on the substrate; a planarization layer formed on the substrate to cover the thin film transistor and comprising a closed-loop groove; a pixel electrode that contacts the thin film transistor and is formed on the planarization layer; a pixel defining layer formed to fill the closed-loop groove; a spacer formed on the planarization layer and disposed outside the pixel electrode; an organic light emitting layer formed on the pixel electrode; and an opposite electrode covering the organic light emitting layer. | 02-12-2009 |
20090072258 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF MANUFACTURING THE SAME - An organic light emitting display includes an organic light emitting diode formed on a substrate, coupled to a transistor; a photodiode formed on the substrate and including a semiconductor layer including a high-concentration P doping region, an intrinsic region with defects and a high-concentration N doping region; and a controller that uniformly controls the luminance of light emitted from the organic light emitting diode by controlling a voltage applied to the first electrode and the second electrode according to the voltage outputted from the photodiode. | 03-19-2009 |
20100127956 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - An organic light emitting display device includes a scan driver for sequentially supplying a scan signal through scan lines; a data driver for supplying an initial power through data lines during a first period of a time period when the scan signal is supplied through a corresponding scan line of the scan lines, and for supplying data signals to the data lines during a second period of the time period when the scan signal is supplied through the corresponding scan line, the second period following the first period; and pixels at crossing regions of the scan lines and the data lines. | 05-27-2010 |
20100176392 | Thin film transistor and method of manufacturing the same - A TFT includes a substrate, a source electrode and a drain electrode on the substrate, the source and drain electrodes separated from each other, an active layer on the substrate between the source electrode and the drain electrode, a cladding unit on side surfaces of the source electrode and the drain electrode, a gate insulating layer on the substrate, the gate insulating layer overlapping the active layer and the cladding unit, and a gate electrode on the gate insulating layer, the gate electrode overlapping the active layer. | 07-15-2010 |