Abstract: An organic light emitting display generates scan signals with a scan driver that includes a plurality of stages. A first stage among the plurality of stages includes a first signal processor receiving a start pulse and a second clock to generate a first output signal, a second signal processor receiving the start pulse and a first clock to generate a second output signal, a third signal processor receiving the first output signal, the second output signal, and a third clock to generate a first scan signal, and a fourth signal processor receiving the first output signal, the second output signal, and a fourth clock to generate a second scan signal.

Abstract: An organic light emitting display capable of preventing erroneous emission from being generated at the initial stage of driving the organic light emitting display and a method of driving the same. The organic light emitting display includes a display unit including data lines, scan lines, emission control lines, and pixels coupled to the data lines, the scan lines, and the emission control lines. A data driver is coupled to the data lines for transmitting data signals. A scan driver is coupled to the scan lines for transmitting scan signals. An emission control driver is coupled to the emission control lines for transmitting emission control signals. A controller is provided for transmitting a plurality of control signals for controlling the data driver, the scan driver, and the emission control driver, and outputting a first control signal for preventing currents from flowing to organic light emitting diodes of the pixels.

Abstract: A buffer and an organic light emitting display using the same that reduces (or prevents) a signal of the organic light emitting display from being delayed by improving an output signal of the buffer.

Abstract: An organic light emitting display device includes a plurality of pixels each coupled to a corresponding one of previous scan lines, a corresponding one of current scan lines, and a data line; first switching elements coupled between the previous scan lines of the pixels and a first test pad, and configured to turn on during a first period of a test period to provide a first test control signal supplied from the first test pad to the pixels; and second switching elements coupled between the current scan lines of the pixels and a second test pad, and configured to turn on during a second period of the test period to provide a second test control signal supplied from the second test pad to the pixels.

Abstract: An Organic Electro Luminescence Display (OELD) to perform a sheet unit test includes a pixel unit including: a plurality of pixels to receive a first power supply voltage (ELVDD), a second power supply voltage (ELVSS) and scanning signals to emit light; a scan driving unit to supply the scanning signals to the pixel unit; and a test unit to test whether or not a defect in the pixel unit is present, and further includes a first wire group arranged in a first direction and having a floated end; and a second wire group arranged in a second direction and having a floated end. This allows the sheet unit test to be conducted without scribing each OELD, by supplying the power supply voltages and the signals for their tests into a plurality of the OELDs formed on a motherboard.

Abstract: An organic light emitting display which prevents unnecessary illumination of the organic light emitting diodes is disclosed. The display has an emission driver which globally turns off all of the pixels during an initialization period, and allows normal operation during other times.

Abstract: A pixel includes a light emitting diode, and a switching circuit that is coupled to a data line and a compensation power source line, and includes a transistor including a control terminal, a first main terminal coupled to a power source line, and a second main terminal coupled to the light emitting diode.

Abstract: A pixel includes a light emitting diode, and a switching circuit that is coupled to a data line, and includes a transistor including a control terminal, a first main terminal coupled to a power source line, and a second main terminal coupled to the light emitting diode. The switching circuit generates a control signal based on at least a voltage of a data signal transmitted through the data line and a voltage drop of the light emitting diode, and applies the control signal to the control terminal of the first transistor to control a current flowing in the light emitting diode so that the current varies in accordance with the voltage of the data signal and is independent of variations in the voltage drop of the light emitting diode.

Abstract: A shift register, including first through third output nodes and first through third input lines for first through third clock signals, a fourth input line adapted to supply a start pulse or an output signal, a voltage level controller coupled between the second and fourth input lines, the voltage level controller being adapted to control voltage levels of the first and second output nodes, a first transistor coupled between a first power supply and the third output node, the third output node being an output node of the stage, a second transistor coupled between the third output node and the third input line, and a third transistor coupled between the first output node and a second power supply.

Abstract: A shift register and an organic light emitting display using the same with a simplified design of a shift register having high reliance, and reduced dead space includes a plurality of stages dependently connected to a start pulse input line, each of the stages including: a voltage level controller to control voltage levels of first and second output nodes according to a start pulse or an output signal of a previous stage and a second clock signal; a control capacitor coupled between the first output node and an input line of a first clock signal; a first transistor coupled between a first power supply and a third output node and including a gate electrode coupled to the first output node; and a second transistor coupled between the third output node and an input line of the third clock signal and including a gate electrode coupled to the second output node.

Abstract: An organic light emitting display device may include a pixel portion including a plurality of pixels, which are coupled to scan lines and data lines, a scan driver adapted to provide scan signals to the scan lines, a first transistor group adapted to test the plurality of pixels, the first transistor group being directly connected to first ends of the data lines, a second transistor group adapted to test the plurality of pixels, the second transistor group being connected to second ends of the data lines, a data distributor coupled between the second ends of the data lines and the second transistor group, a first wire group extending in a first direction at an outer area of the light emitting display device, and a second wire group extending in a second direction at the outer area of the light emitting display device.

Abstract: An OLED display and a driving method of an inspection circuit are provided. The OLED display may include a data driver, a scan driver, a driving transistor, a switching transistor, an organic light emitting diode, and an inspection circuit. The data driver and scan driver may apply a data signal and a scan signal. The driving transistor may generate a current corresponding to a voltage supplied to a first electrode and a control electrode. The switching transistor may apply the data signal to the driving transistor. The organic light emitting diode may be electrically connected to the driving transistor. The inspection circuit may include a three-phase inverter circuit having an input and an output terminal. The input terminal may supply a first power voltage to the output terminal when the output terminal decides an output signal regardless of a signal input to the input terminal.

Abstract: A pixel circuit including a light emitting device; a driving transistor to receive first power and supply current corresponding to voltage applied to a gate electrode thereof to the light emitting device; a first switching device to supply a data signal in response to a first scan signal; a second switching device to supply second power to the gate electrode of the driving transistor in response to the first scan signal; a capacitor to store voltage corresponding to the data signal and the second power according to operations of the first and second switching devices; a third switching device to apply voltage corresponding to the voltage stored in the capacitor to the gate electrode of the driving transistor in response to a second scan signal; and a fourth switching device to transmit the first power to the driving transistor in response to a third scan signal.

Abstract: An organic light emitting display device and a testing method thereof is provided. The organic light emitting display device may be used to perform a test of a sheet unit for a plurality of organic light emitting display devices formed on a mother substrate. The organic light emitting display device can separately turn off particular organic light emitting display devices. A display region includes a plurality of pixels, which are connected to scan lines and data lines. A scan driver supplies a scan signal to the scan lines. A peripheral region surrounds the display region and includes a first wiring group extending in a first direction and a second wiring group extending in a second direction. A transistor group includes a plurality of transistors, which are coupled with one end of the data lines. An on/off controller is coupled with at least one wiring of the first wiring group and at least one wiring of the second wiring group.

Abstract: A scan driver having no shift register and an organic light emitting display device having the same are disclosed. The scan driver includes a latch unit and a NAND gate instead of a shift register, thereby reducing the area occupied by the driver in a display panel. The scan driver uses only a clock signal and a start pulse, thereby reducing the number of driving lines and transistors and reducing power loss.

Abstract: An organic light emitting display includes a plurality of pixels, at least one of the pixels having: an organic light emitting diode; a driving transistor adapted to supply a driving current to the organic light emitting diode; a first switching transistor adapted to selectively supply a data signal to the driving transistor; a second switching transistor adapted to selectively supply an initialization signal; a third switching transistor adapted to selectively allow the driving transistor to be connected as a diode and to selectively supply the initialization sought; a storage capacitor adapted to store a first voltage corresponding to the initialization signal received from the third switching transistor and then to store a second voltage corresponding to the data signal applied at a gate electrode of the driving transistor; and an interrupter adapted to selectively supply a pixel power to the driving transistor and to selectively allow the driving current to flow into the organic light emitting diode.

Abstract: The present invention relates to a light emitting display, and display panel and driving method thereof. The display panel includes a plurality of data lines for transmitting a data signal, a plurality of scan lines for transmitting a selection signal, and a plurality of pixels coupled to the data lines and the scan lines. The pixel includes at least two emitters for emitting different colors from each other in response to an applied current, and a driver for receiving the data signal while the selection signal is applied and outputting a first current corresponding to the data signal. The driver outputs the first current to at least the first and second emitters for emitting substantially the same color among the emitters formed in the pixels.

Abstract: A light emitting display has a main displaying part and a subsidiary displaying part formed on one substrate and equalized in brightness. The light emitting display comprises: a first displaying part formed on a substrate and displaying a picture; a second displaying part formed on the substrate and displaying a picture; a first driving power line for supplying first driving power to the first displaying part; and a second driving power line for supplying second driving power, different from the first driving power, to the second displaying part. With this configuration, the invention provides a light emitting display in which the main displaying part and the subsidiary displaying part are equalized in brightness.