Patent application number | Description | Published |
20080211397 | Pixel, organic light emitting display using the same, and driving method thereof - A pixel, an organic light emitting display using the pixel, and a driving method thereof may compensate for degradation of an organic light emitting diode. The pixel includes the organic light emitting diode and a drive transistor that supplies an electric current to the organic light emitting diode. A pixel circuit compensates a threshold voltage of the drive transistor. A compensator controls the voltage of the gate electrode of the drive transistor in order to compensate a degradation of the organic light emitting diode. | 09-04-2008 |
20080309531 | Data Driver and Driving Method of Organic Light Emitting Display Device Using the Same - A data driver capable of generating data signals with desired voltage values. The data driver includes a first digital-analog converter including a plurality of first switches, the first digital-analog converter selecting two reference voltages from among a plurality of reference voltages by turning on two of the first switches corresponding to high level bits of data; and a second digital-analog converter for dividing the two reference voltages into a plurality of voltages and for supplying any one of the two reference voltages and the divided voltages corresponding to low level bits of the data as a data signal to an output terminal, wherein the second digital-analog converter includes a transistor turned on by a bias voltage to compensate for a turn-on resistance of the two of the first switches. | 12-18-2008 |
20090027369 | Organic light emitting display and driving method thereof - An organic light emitting display configured to be driven using a frame divided into a plurality of sub-frames includes a data driver configured to supply a plurality of data signals to output lines during a first period of one horizontal period of the sub-frame, a scan driver configured to sequentially supply a scan signal to scan lines during a second period of the one horizontal period of the sub-frame, a demultiplexer coupled to each output line, the demultiplexer being configured to supply the data signals to a plurality of data lines, buffers configured to supply buffers supplying signals from the demulitplexers to the data lines, the buffers including PMOS transistors, and pixels disposed at intersections of the scan lines and the data lines, the pixels being configured to display images corresponding to the data signals. | 01-29-2009 |
20090140956 | ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting display and a driving method thereof capable of reducing power consumption. A driving transistor controls a current through an organic light emitting diode of the display. A voltage controller supplies a first voltage to the anode of the OLED of at least one specific pixel and controls the cathode voltage of the OLED in correspondence to a second current through the OLED, such that the cathode voltage corresponds to the first voltage supplied to the OLED. Thus, the driving transistor can be driven in saturation mode with consistent current in spite of process variations, with a reduced power consumption. | 06-04-2009 |
20090207110 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - The organic light emitting display device according to the present invention includes a scan driver for supplying a scan signal to scan lines during a frame time-divided into a plurality of subframes, a data driver coupled to output lines for supplying data signals on each of the output lines, data distributors coupled to the output lines for distributing the data signals to data lines, concurrently, in synchronization with the scan signal, and pixels located at crossing regions of the data lines and the scan lines. Each of the data distributors includes a sampling latch for distributing the data signals to different channels and for storing the data signals, and a holding latch coupled to the sampling latch for supplying the data signals of the channels to the data lines concurrently. | 08-20-2009 |
20090219232 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel of an organic light emitting display device and an organic light emitting display device using the same. The pixel is configured to compensate for the deterioration of organic light emitting diodes. The pixel includes an organic light emitting diode; a pixel circuit including a drive transistor for controlling an amount of electric current that flows from a first power source to a second power source via an organic light emitting diode; and a compensation unit between a gate electrode and a first electrode of the drive transistor for controlling a voltage of the gate electrode of the drive transistor to correspond to the deterioration of the organic light emitting diode. The compensation unit includes a transistor and a capacitor coupled in series between the gate electrode and the first electrode of the drive transistor. | 09-03-2009 |
20090243976 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel capable of compensating for deterioration of an organic light emitting diode includes an organic light emitting diode. A pixel circuit includes a first transistor controlling an amount of current supplied from a first power supply to the organic light emitting diode corresponding to a data signal. A compensating unit controls a voltage of a gate electrode of the first transistor to compensate for deterioration of the organic light emitting diode. The compensating unit includes a second transistor coupled between the gate electrode of the first transistor and the organic light emitting diode and turned off during a period of the supply of the data signal to the pixel circuit, and a feedback capacitor coupled between the second transistor and the organic light emitting diode. | 10-01-2009 |
20090295782 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - An organic light emitting display and a driving method thereof that reduces false contour noise and the occurrence of a stripe pattern generated in a digital driving manner. The organic light emitting display includes a scan driver for supplying a scan signal to scan lines, a data driver for supplying a data signal to data lines, and pixels coupled to the scan lines and the data lines. Each of the pixels includes an organic light emitting diode. The organic light emitting diodes of the pixels coupled to a scan line are alternately positioned in a first horizontal line and a second horizontal line adjacent to the first horizontal line, respectively. | 12-03-2009 |
20100038719 | Semiconductor apparatuses and methods of manufacturing the same - Disclosed are semiconductor apparatuses and methods of fabricating the same. According to the methods, the number of operations for fabricating the semiconductor apparatuses having a plurality of layers may be the same as the number of operations for fabricating a semiconductor apparatus having one layer. The semiconductor apparatuses may include first active regions extending in the same direction, in parallel, separated from each other and including first and second impurity doped regions on opposite ends of the first active regions from each other. The semiconductor apparatuses may further include second active regions on a layer above the first active regions, extending in the same direction as the first active regions, separated from each other, in parallel, and including first and second impurity doped regions on opposite ends of the second active regions from each other. | 02-18-2010 |
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 |
20100128014 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel includes an organic light emitting diode; a first transistor for supplying current to the organic light emitting diode; a second transistor coupled between a gate electrode of the first transistor and a data line, the second transistor for supplying a data signal from the data line to the gate electrode of the first transistor when a scan signal is supplied through a scan line coupled to the pixel; a storage capacitor having a first terminal coupled to the gate electrode of the first transistor; a fourth transistor coupled to a second terminal of the storage capacitor, the fourth transistor for supplying a reference voltage to the second terminal of the storage capacitor when the scan signal is supplied through the scan line; and a third transistor coupled between the second terminal of the storage capacitor and an anode electrode of the organic light emitting diode. | 05-27-2010 |
20100141645 | Organic light emitting display device and method of driving the same - An organic light emitting display device capable of driving transistor threshold voltage compensation, including: pixels positioned in the intersections of scan lines and data lines, wherein each pixel comprises: a first transistor and a fourth transistor, connected at a common node, disposed between an anode of an OLED and a first power supply; a cathode of the OLED connected to a second power supply; a second transistor connected between a gate of the first transistor and a data line, and turned on when a scan signal is supplied to a scan line; a third transistor connected between the common node and the data line, and turned on when a scan signal is supplied to the scan line; a first capacitor connected between the gate of the first transistor and the anode of the OLED; and a second capacitor connected between the anode of the OLED and a predetermined voltage source. | 06-10-2010 |
20100156762 | Organic light emitting display device - An organic light emitting display (OLED) device capable of compensating for threshold voltage of a driving transistor in which this OLED device uses a scan driver to sequentially supply scan signals to scan lines. A data driver supplies data signals to data lines when the scan signals are supplied with pixels positioned at the intersections of the scan lines and the data lines. A common circuit unit formed in every horizontal line, receiving one or more external power sources required in driving the pixels and transferring the received external power to pixels positioned in the same horizontal lines. | 06-24-2010 |
20100177024 | Organic light emitting display - An organic light emitting display, includes scan lines and data lines that overlap each other, a pixel unit including pixels positioned at intersections of the scan lines and the data lines, a main power source line at one end of the pixel unit and adapted to receive a voltage of a first power source, and sub power source lines coupled to the main power source line and the pixels, wherein each of the pixels comprises at least one capacitor, and the capacitors have different capacitances based on a position of the respective pixels relative to the main power source line. | 07-15-2010 |