Patent application number | Description | Published |
20080203931 | Organic light emitting display and method of manufacturing the same - A light emitting display includes a substrate, a semiconductor layer on the substrate, a first insulation layer on the semiconductor layer, a first electrode layer and a second electrode layer on the first insulation layer, the first electrode layer having a first length and the second electrode layer having a second length, the first electrode layer corresponding to a storage capacitor, the second electrode layer corresponding to a boosting capacitor, a second insulation layer on the first electrode layer and the second electrode layer, and a third electrode layer on the second insulation layer, wherein a length of a first portion of the third electrode layer that overlaps the first electrode layer is longer than a length of a second portion of the third electrode layer that overlaps the second electrode layer. | 08-28-2008 |
20080224965 | Pixel, organic light emitting display using the same, and associated methods - A pixel including an OLED, the pixel including a first transistor coupled between a data line and a first node, the first transistor being turned on by a low signal on an i-th scan line, a second transistor coupled between a first power source and a fifth transistor, a third transistor coupled between the gate electrode of the second transistor and an electrode of the second transistor that is coupled to the fifth transistor, the third transistor being turned on by a low signal on an (i−1)-th scan line, a fourth transistor coupled between a first reference voltage and the first node, the fourth transistor being turned on by the low signal on the (i−1)-th scan line, a storage capacitor coupled between the first node and the second node, and a compensator controlling a voltage of the second node corresponding to degradation of the OLED. | 09-18-2008 |
20080252217 | Pixel, organic light emitting display using the same, and associated methods - An organic light emitting display includes a scan driver configured to sequentially supply a scan signal to scan lines and sequentially supply a light emitting control signal to light emitting control lines, a data driver configured to supply a data signal to data lines, and pixels arranged coupled to the scan lines, the data lines and the light emitting control lines. Each of the pixels includes an organic light emitting diode, a second transistor, a storage capacitor coupled between an i-1 | 10-16-2008 |
20080315189 | ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE AND METHOD OF FABRICATING THE SAME - An organic light emitting diode (OLED) display device and a method of fabricating the same capable of minimizing the number of process operations and a decrease in aperture ratio. The OLED display device includes a compensation circuit to compensate for a threshold voltage of a driving transistor. A pixel circuit of the OLED display device can be stably driven, can minimize a threshold voltage of a driving transistor using a minimized structure, and can increase an aperture ratio of the display device. | 12-25-2008 |
20080316150 | ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE - An organic light emitting diode (OLED) display device minimizes a threshold voltage variation of a drive transistor in a pixel circuit, increases an aperture ratio, and minimizes power consumption by applying a same range of data voltages to respective pixels. The OLED display device includes a first capacitor electrically connected between a first node and a power supply line; and a second capacitor electrically connected between the first node and a second node, wherein capacitances of the first and second capacitors are different from each other and adjustable. | 12-25-2008 |
20090027310 | Pixel, organic light emitting display using the same, and associated methods - A pixel including an organic light emitting diode, a second transistor controlling a current supplied to the organic light emitting diode, a pixel circuit configured to compensate a threshold voltage of the second transistor; and a compensating unit controlling a voltage of a gate electrode of the second transistor in order to compensate for deterioration of the organic light emitting diode. The compensating unit includes seventh and eighth transistors coupled in series between the organic light emitting diode and a first power source, the seventh and eight transistors being commonly connected to a fourth node therebetween, first and second feedback capacitors coupled in series between the fourth node and a second node, the second node being coupled to the gate electrode of the second transistor, and a ninth transistor coupled between a predetermined voltage source and a fifth node that is common to the first and second feedback capacitors. | 01-29-2009 |
20090146987 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY - A pixel at an ith pixel row (i is a natural number) includes an organic light emitting diode (OLED); a driving transistor for supplying a current to the OLED and a storage capacitor between a gate electrode of the driving transistor and an (i−1)th emission control line; and a compensating unit for controlling a voltage of the gate electrode of the driving transistor to compensate for deterioration of the OLED. The compensating unit includes: a first compensating unit transistor and a second compensating unit transistor between the OLED and a first power source; first and second feedback capacitors between a second node between the first and second compensating unit transistors and a first node between the gate electrode of the driving transistor and the storage capacitor; and a third compensating unit transistor coupled between a third node between the first and second feedback capacitors and a reference voltage source. | 06-11-2009 |
20090243979 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel is provided including an OLED having anode and cathode electrodes. A second transistor controls current supplied from a first power supply to a second power supply via the OLED. A first transistor is coupled between a gate electrode of the second transistor and a data line and is configured to turn on when a scan signal is supplied to a scan line. A first capacitor is coupled between the first power supply and the gate electrode. A second capacitor is coupled between the anode electrode and the gate electrode. A fourth transistor is coupled between the second capacitor and the anode electrode and is configured to turn on when a control signal is supplied to a control line. A third transistor is coupled between the second transistor and the anode electrode and is configured to turn off when a signal is supplied to a light emitting control line. | 10-01-2009 |
20090251392 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE - A pixel and an organic light emitting display device using the same is provided. The pixel includes an organic light emitting diode (OLED). A pixel circuit controls an amount of current that flows into the OLED. In the pixel, the pixel circuit includes a first transistor controlling an amount of current that flows into a second power source via the OLED from a first power source. A storage capacitor is positioned between a gate electrode of the first transistor and the second power source. A boosting capacitor is positioned between the gate electrode of the first transistor and a boost line. | 10-08-2009 |
20090309818 | ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting display includes: scan lines for applying scan signals; control lines for applying control signals; and data lines for applying data signals. The organic light emitting display further includes: pixels coupled to the scan, control and data lines for displaying an image; power supply lines coupled to the pixels; and a data driver for supplying the data signals of the image to the data lines. The organic light emitting display also includes: a power supply driver for swinging a voltage at the power supply lines between a first level and a second level; a sensing unit including a current sink for sinking a first current from the pixels and a current source for supplying a second current to the pixels; and a switching unit for selectively electrically coupling the pixels to at least one of the data driver, the current source or the current sink. | 12-17-2009 |
20100133988 | AN ORGANIC ELECTROLUMINESCENT DISPLAY HAVING LOW DATA LINE CAPACITANCE - An organic electroluminescent display in which a power supply line for a power supply voltage is separated from data lines for data signals in a signal input portion is disclosed. The power supply line over the data lines is employed as a pixel electrode or a cathode to supply the power supply voltage. This arrangement decreases the parasitic capacitance between the two lines and reduces load on the data lines. | 06-03-2010 |
20100283776 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - In an organic light emitting diode display, a plurality of sub-pixels sharing a select scan line that extends in a row direction forms a unit pixel, and the plurality of sub-pixels are arranged in a column direction in the unit pixel. A field is divided into a plurality of subfields, and corresponding one of the plurality of sub-pixels emits light in each of the plurality of subfields. | 11-11-2010 |