Patent application number | Description | Published |
20090315919 | Display device and method of driving the same - A display device and a method for driving the display device are provided. A pre-gain correction value that can emphasize a contour portion of an image is set by using luminance data detected from an input video signal. The pre-grain correction value is differently amplified in accordance with different light emitting materials that emit light of different colors red, green and blue. The contour portion is thus emphasized, and the contour can be stably emphasized regardless of different life-spans of different light emitting materials emitting lights of colors red, green and blue. | 12-24-2009 |
20100090999 | Display device and the driving method thereof - A display device and a driving method thereof. The display device detects luminance data from an input video signal, detects the amount of change of the luminance data, detects contour of an image displayed from the input video signal, and emphasizes the detected contour to generate a converted input video signal. The display device compensates the converted input video signal by comparing a data size of the converted input video signal with that of the input video signal and controlling the data size of the converted input video signal to be less than that of the input video. | 04-15-2010 |
20100177090 | Display device - A display device includes a plurality of scan lines that extend in a first direction and transfer a plurality of scan signals, a plurality of data lines that extend in a second direction intersecting the first direction and transfer data signals corresponding to input video signals, a plurality of sub-pixels formed in an area defined by the plurality of scan lines and the plurality of data lines, a plurality of pixels defined by the plurality of sub-pixels, and a barrier structure corresponding to the plurality of pixels, the barrier structure including a transmitting area and a non-transmitting area, wherein at least two adjacent sub-pixels arranged in the second direction form one pixel. | 07-15-2010 |
20100194866 | Electronic imaging device and driving method thereof - An electronic imaging device includes a display unit including a plurality of pixels divided into a first region and a second region, and a controller that generates first and second control signals to control the light emission of the plurality of pixels and applies the first and second control signals to the plurality of pixels in the first region and the plurality of pixels in the second region, respectively. The controller may generate and apply the first control signal as a turn-off signal when second stereoscopic images synthesized in a second order different from a first order are displayed in the first region after first stereoscopic images synthesized in the first order are displayed in both the first and second regions. | 08-05-2010 |
20110254871 | DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME - A display device includes a plurality of pixels, each of said plurality of pixels includes a driving transistor and a light emitting diode, a compensator to receive first and second pixel currents generated by the plurality of pixels according to first and second data voltages respectively applied to the plurality of pixels, the compensator to calculate an image data compensation amount to compensate for variations in characteristics of the driving transistor of each of said plurality of pixels and a data selector to transmit the first and second data voltages to the plurality of pixels and to transmit the first and second pixel currents to the compensator, the compensator to measure the first and second pixel currents generated as a result of the first and second data voltages corresponding to different gray scale levels and to calculate an actual threshold voltage and mobility of the driving transistor of each of the pixels, the compensator including a measurement resistor, the compensator to control a resistance value of the measurement resistor, the measurement resistor to convert the first pixel current corresponding to the first data voltage into a first measured voltage and the second pixel current corresponding to the second data voltage into a second measured voltage. | 10-20-2011 |
20110279436 | Display device and driving method thereof - An organic light emitting diode (OLED) display includes a display unit including a plurality of pixels, a plurality of scan lines, and a plurality of data lines, a data driver transmitting a plurality of data signals to the plurality of data lines, a scan driver transmitting a plurality of scan signals to the plurality of scan lines, a compensation controller supplying a predetermined first current to each organic light emitting diode in each of the plurality of pixels during a sensing period for measuring a driving voltage of the organic light emitting diode for each of a plurality of pixels, receiving the driving voltage of the organic light emitting diode supplied with the first current, and outputting measuring data for the transmitted driving voltage; and a signal controller compensating an input video signal according to the measuring data to generate image data. The compensation controller is separate from and external to the data driver. | 11-17-2011 |
20110279437 | Organic light emitting display and driving method thereof - An organic light emitting diode (OLED) display and a driving method thereof include an OLED, a driving transistor supplying a driving current to the OLED, a data line transmitting a data signal to the driving transistor, a first switch including a first electrode connected to one electrode of the OLED and a second electrode connected to the data line, and a second switch including a first electrode connected to the data line and a second electrode connected to the gate electrode of the driving transistor. The first switch is turned on such that a predetermined first current is transmitted to the OLED, the voltage of one electrode of the OLED is received through the data line, the deterioration degree of the OLED is detected according to the transmitted voltage, and the data signal transmitted to the data line is compensated according to the detected deterioration. | 11-17-2011 |
20110279444 | DISPLAY DEVICE TO COMPENSATE CHARACTERISTIC DEVIATION OF DRVING TRANSISTOR AND DRIVING METHOD THEREOF - A display device includes a display having a plurality of pixels, a compensator that for each of a plurality of pixels, calculates an image data compensation amount that compensates a characteristic deviation of a driving transistor of each pixel by measuring the first pixel current generated by the first data voltage and the second pixel current generated by the second data voltage obtained by amending the first data voltage, and initializes a panel capacitor that is parasitic on a plurality of data lines connected to the plurality of pixels in the measurement of the first pixel current and the measurement of the second pixel current; and a signal controller that generates an image data signal by reflecting the compensation amount of the image data. It is possible to shorten a compensation period for compensating a characteristic deviation between driving transistors, and since a data writing period in which a data signal is written in each pixel and a light emitting period in which, after the writing of the data signal corresponding to each pixel is completed, the entire pixel emits light at once, making it possible to more efficiently display the image. | 11-17-2011 |
20110292015 | ORGANIC LIGHT EMITTING DISPLAY DEVICE WITH PIXEL AND DRIVING METHOD THEREOF - A pixel operating in a concurrent (or simultaneous) emission method includes: an organic light emitting diode; a second transistor for controlling an amount of current flowing to a second power supply through the organic light emitting diode from a first power supply, the first power supply being coupled to a first electrode of the second transistor; a first transistor coupled between a data line and a gate electrode of the second transistor; a first capacitor coupled between a second electrode of the first transistor and the first power supply; and a fourth transistor coupled between a second electrode of the second transistor and the organic light emitting diode, wherein the first transistor and the fourth transistor are configured to be turned on during a period when the first capacitor is charged with a voltage corresponding to a data signal. | 12-01-2011 |
20110298836 | ORGANIC LIGHT EMITTING DIODE DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting diode display is disclosed. A signal from the pixels in the display is transmitted to a circuit which compensates the image data according to the signal, which is indicative of one or more of ageing of the organic light emitting diodes, the threshold voltages of the driving transistors, and current mobility of the driving transistors. | 12-08-2011 |
20120026147 | ORGANIC LIGHT EMITTING DISPLAY - An organic light emitting display includes a display unit including a plurality of pixels coupled to scan lines, first control lines, second control lines, and data lines, a control line driver for providing first and second control signals to the pixels through the first and second control lines, and a timing controller for controlling the control line driver. The timing controller is configured to determine a refresh rate of input data to control points of time at which the first and second control signals are applied in a frame. | 02-02-2012 |
20120026155 | ORGANIC LIGHT EMITTING DISPLAY - There is provided an organic light emitting display. The organic light emitting display includes a display unit including pixels coupled to scan lines, control lines, and data lines; 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 the data lines; a first power source driver for applying a first power to the pixels of the display unit; a second power source driver for applying a second power to the pixels of the display unit; and a timing controller for controlling the control line driver, the power source drivers, the scan driver, and the data driver. The timing controller is configured to determine a refresh rate of input data to control a length of an emission period in a frame. | 02-02-2012 |
20120026207 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - There is provided an organic light emitting display capable of minimizing noise. A method of driving the organic light emitting display includes setting pixels included in horizontal blocks into a non-emission state, the pixels charging voltages corresponding data signals, the pixels starting to emit light at different times in units of the horizontal blocks, and emitting light from the pixels according to the charging voltages. | 02-02-2012 |
20120105496 | Organic light emitting display and method of driving the same - A method of driving an OLED, including a plurality of first sub pixels and a plurality of second sub pixels alternating each other. The method includes setting a plurality of first sub pixels to be in a non-emission state in ith (i is 1, 3, 5, . . . ) frames, selecting the plurality of first sub pixels in units of horizontal lines while sequentially supplying a first scan signal in the ith frames, setting a plurality of second sub pixels to be in a non-emission state in (i+1)th frames, and selecting the plurality of second sub pixels in units of horizontal lines while sequentially supplying a second scan signal in the (i+1)th frames. The plurality of second sub pixels are set to be in the emission state in the first ith frames and the plurality of first sub pixels are set to be in the emission state in the (i+1)th frames. | 05-03-2012 |