Patent application number | Description | Published |
20100013824 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - 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. | 01-21-2010 |
20100039423 | SCAN DRIVER AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - 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. | 02-18-2010 |
20110025585 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE HAVING THE SAME - A pixel including: an organic light emitting diode that is coupled between a first power supply and a second power supply; a first transistor that is coupled between the first power supply and the organic light emitting diode and whose gate is connected to a first node; a second transistor that is coupled between the first node and a data line and whose gate electrode is coupled to a scan line; and a storage capacitor whose first electrode is coupled to the first node and second electrode is coupled to the first power supply, wherein the storage capacitor includes: a semiconductor layer that is positioned on a different layer from that of the data line and that expands to a region where the semiconductor layer overlaps with the data line and constitutes the first electrode, a first dielectric layer that is formed on the semiconductor layer, a first conductive layer that is formed on the first dielectric layer and constitutes the second electrode, a second dielectric layer that is formed on the first conductive layer, and a second conductive layer that is formed on the second dielectric layer and constitutes the first electrode together with the semiconductor layer, the first conductive layer being positioned between the data line and the semiconductor layer in order to cover the upper part of the region where it overlaps with the data line of the semiconductor layer. | 02-03-2011 |
20110080393 | Driver and organic light emitting diode display using the same - A driver comprises odd-numbered stages configured to be driven by first and second clock signals and even-numbered stages configured to be driven by the second and third clock signals. Each stage is coupled to a corresponding emission control line, and includes a first driver, a second driver, and a third driver. In a first stage, the first and second drivers receive first and second start pulses and output first and second output signals, respectively. In each stage except the first stage, the first and second driver receives first and second output signals of a previous stage and outputs first and second output signals of each stage, respectively. In each stage, a third driver receives the first and second output signals of each stage and outputs an emission control signal to be transmitted to an emission control line coupled to each stage. | 04-07-2011 |
20110141000 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel circuit and an organic light emitting display using the pixel circuit are disclosed. The pixel circuit compensates for variation of the threshold voltage of a driving transistor and for variation in the power supply to the pixel. | 06-16-2011 |
20110141091 | DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A display device that can reduce power and simplify a manufacturing process includes a display unit and a scan driver. The display unit includes a plurality of scan lines, a plurality of data lines, and a plurality of pixels. The scan lines are configured to receive a plurality of scan signals. The scan driver is configured to receive a synchronization signal that is generated in synchronization with a vertical synchronization signal, a first light emitting clock signal, a second light emitting clock signal representing the first light emitting clock signal shifted by a half cycle, a first initialization signal having a first phase delay relative to the second light emitting clock signal, and a second initialization signal having a second phase delay relative to the first light emitting clock signal. The scan driver is configured to generate a plurality of sequential driving signals and the plurality of scan signals. | 06-16-2011 |
20110193892 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device and a driving method to reduce power consumption, and to simplify the process of manufacturing the display device by configuring a driver made of PMOS transistors, is disclosed. The display device includes a display unit and a light emission driver. The display unit includes scan lines for transmitting scan signals, data lines for transmitting data signals, light emitting signal lines for transmitting light emitting signals, and pixels coupled to the scan lines, data lines, and light emitting signal lines. The light emission driver is for receiving a partial driving selection signal for selecting one of a normal driving mode or a partial driving mode, an area selection signal for dividing the display unit into a display area and a non-display area, a synchronization signal generated in synchronization with a vertical synchronization signal, and first and second light emitting clock signals, for outputting the light emitting signals. | 08-11-2011 |
20120019504 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel includes an OLED coupled to a second power supply, a first transistor coupled to a first power supply for controlling current through the OLED, a second transistor coupled between a data line and the first transistor, third transistors coupled between a gate electrode and a second electrode of the first transistor, the second and third transistors configured to be turned on when the scanning signal is supplied to the i-th scanning line, fourth transistors coupled between an initial power supply and the first transistor, and configured to be turned on when the scanning signal is supplied to an i−1-th scanning line, a first capacitor coupled between the first power supply and the first transistor, and a second capacitor with a first terminal coupled to nodes between two of the third transistors and two of the fourth transistors, and a second terminal coupled to the first power supply. | 01-26-2012 |
20130063330 | Organic Light-Emitting Display Device - An organic light-emitting display device which may widen a swing range of a green sub-pixel. In the organic light-emitting display device, from among red, green, and blue sub-pixels, an overlapping area of material layers forming a thin film transistor, a boost capacitor and/or a storage capacitor of the green sub-pixel is greater than an overlapping area of the same material layers forming a thin film transistor, a boost capacitor and/or a storage capacitor of the red and blue sub-pixels. Accordingly, since a swing range of the green sub-pixel having relatively high light-emitting efficiency is widened, more accurate gradation may be displayed, a reliable product may be realized, a brightness variation of the organic light-emitting display device may be reduced, and the risk of poor image quality may be reduced. | 03-14-2013 |
20140198090 | ORGANIC LIGHT-EMITTING DISPLAY DEVICE - An organic light-emitting display device includes an organic light-emitting display panel displaying an image that includes a plurality of frames, a data driver providing a plurality of data signals, which correspond to the image, to the organic light-emitting display panel, and a gamma voltage generator providing a gamma voltage, which varies in a same period as each of the frames, to the data driver. | 07-17-2014 |
20140198135 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - Provided is an organic light emitting display device including: a scan driver configured to supply a scan signal to a scan line during a scan period of a horizontal period; a data driver configured to supply a plurality of data signals to a plurality of output lines during a data period of the horizontal period; a demultiplexer configured to transmit the data signals through the output lines to a plurality of data lines according to a plurality of control signals; and a demultiplexer controller configured to supply the control signals to the demultiplexer, with a supply order of the control signals being changed for each frame. | 07-17-2014 |
20140240379 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - An organic light emitting diode (OLED) display includes: a display unit comprising a plurality of data lines, a plurality of scan lines, and a plurality of pixels coupled to corresponding data lines of the data lines and corresponding scan lines of the scan lines; a scan driver configured to supply a plurality of scan signals to the scan lines; a data driver configured to: output a plurality of first data signals among a plurality of data signals through a plurality of first output lines among a plurality of output lines, output a plurality of second data signals among the data signals through the first output lines, and output a plurality of third data signals among the data signals through a plurality of second output lines among the output lines, wherein the first data signals represent a first color, the second data signals represent a second color, and the third data signals represent a third color; and a data distribution unit configured to: transmit the first data signals to a plurality of corresponding first data lines among the data lines according to a first clock signal, transmit the second data signals to a plurality of corresponding second data lines among the data lines according to a second clock signal, and transmit the third data signals to a plurality of corresponding third data lines among the data lines. | 08-28-2014 |
20140375616 | STAGE CIRCUIT AND ORGANIC LIGHT EMITTING DISPLAY INCLUDIING THE SAME - A stage circuit including a plurality of stages connected to each other, where each of the stages includes: an output unit configured to output a voltage of a first power source or a signal of a third input terminal to an output terminal, based on a voltage applied to a first node or a second node; a first driver configured to control a voltage at a third node, based on signals of a first input terminal, a second input terminal and the third input terminal; a second driver configured to control the voltage at the first node, based on the signal of the second input terminal and the voltage at the third node; and a first transistor connected between the second node and the third node and maintained in a turn-on state. | 12-25-2014 |
20150029169 | SCAN LINES DRIVER AND ORGANIC LIGHT EMMITING DISPLAY DEVICE USING THE SAME - In a scan lines driver that is used for driving scan lines of an organic light emitting diodes (OLED) display, a large voltage drop can develop between the gate or source of one of its transistors and the corresponding drain during a scan signal outputting period. This large voltage drop can excessively stress the one transistor. However, in accordance with the present disclosure, a voltage drop dissipating, second transistor is provided in series with the first transistor for absorbing part of the large voltage drop and thus reducing the stress that is applied to the first transistor. | 01-29-2015 |