| Patent application number | Description | Published |
|---|
| 20110007067 | ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting display that can stably extract information from pixels. A driving method of the organic light emitting display includes: generating first digital values by sensing deterioration information of organic light emitting diodes respectively included in a plurality of pixels coupled to a data line during two or more continuous frame periods; storing the first digital values in a memory; generating second digital values by sensing threshold voltage and mobility information of driving transistors respectively included in the pixels during two or more continuous frame periods; storing the second digital values in the memory; converting input data into calibration data according to the information stored in the memory to display an image having a uniform brightness, irrespective of the deterioration information of the organic light emitting diodes and the threshold voltage and mobility information of the driving transistors; and supplying a data signal in accordance with the calibration data to the data line. | 01-13-2011 |
| 20110012819 | CURRENT GENERATOR AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A current generator for supplying or sinking current to/from pixels. The current generator includes a variable power source, a first amplifier having a first input terminal coupled to the variable power source, a sensing resistor coupled between an output terminal of the first amplifier and an external terminal of the current generator, and a second amplifier having a first input terminal and a second input terminal coupled to respective ends of the sensing resistor and an output terminal coupled to a second input terminal of the first amplifier. | 01-20-2011 |
| 20110018858 | Organic light emitting display and method of driving the same - An organic light emitting display capable of compensating for threshold voltage variations of a driving transistor may include scan and data drivers, pixels, an initial power source unit, a switching unit, a compensating unit, and a timing controller. The scan and data drivers may control current that flows from a first to a second power source via an OLED. The switching unit may selectively couple the initial power source unit to the data driver. The compensating unit may store second data corresponding to a threshold voltage of a driving transistor and may transmit the stored second data to the data driver. The timing controller may transmit the externally supplied first data input to the data driver and may control the scan driver, the data driver, and the compensating unit. The data driver may generate and supply third data signals to the pixels using the first and the second data. | 01-27-2011 |
| 20110057917 | Organic light emitting display and method of driving the same - An organic light emitting display includes a mode determining unit adapted to determine whether the display is in a low power or common driving mode based on an operation control signal and to generate a control signal corresponding to the determined mode, a scan driver adapted to sequentially supply scan signals to scan lines, a data driver adapted to supply data signals to data lines in synchronization with the scan signals, pixels arranged at intersections of the scan lines and the data lines, and a timing controller adapted to control the scan driver and the data driver so that a frame frequency changes based on whether the low power driving mode or the common driving mode control signal is supplied from the mode determining unit, wherein the scan driver is adapted to uniformly maintain a pulse width of the scan signals regardless of a change in the frame frequency. | 03-10-2011 |
| 20110063283 | Organic light emitting display and method of driving the same - A method of driving an organic light emitting display, includes extracting information on deterioration of an organic light emitting diode (OLED) and information on a threshold voltage and mobility of a driving transistor included in each of the pixels to store the information in a memory unit during a non-display period, converting input data into corrected data using the information items stored in the memory unit, and supplying data signals corresponding to the corrected data to data lines, wherein, extracting the information, includes storing the information on the deterioration of the OLED and the information on the threshold voltage and mobility of the driving transistor in a non-volatile memory, and storing the information in a volatile memory. | 03-17-2011 |
| Patent application number | Description | Published |
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| 20080252650 | Organic light emitting display, driver system therfor and driving method thereof - The organic light emitting display may include a scan driver configured to sequentially supply a scan signal to scan lines during every subframe period, a data driver configured to supply a data signal to data lines when the scan signal is supplied, at least one lookup table configured to store a gamma correction value to gamma-correct data input from the outside, and a frame memory arranged between the lookup table and the data driver to store the gamma-corrected data. | 10-16-2008 |
| 20080266215 | Organic light emitting display and driving method thereof - Disclosed is an organic light emitting display of improved an image quality. The organic light emitting display includes a frame memory for storing a data to correspond to a write clock and outputting the data stored according to a read clock; a signal generation unit for supplying the read clock; a data driver for converting the data, supplied from the frame memory, into a data signal and supplying the converted data signal to data lines; a scan driver for supplying a scan signal to scan lines; and pixels arranged near crossing points between the scan lines and the data lines, wherein the read clock has a higher frequency than the write clock. | 10-30-2008 |
| 20080316232 | METHOD OF DRIVING ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE - A method of driving an organic light emitting diode (OLED) display device that displays grayscales in a time-division manner and can prevent the occurrence of false contours and flickers at an interface between neighboring grayscales when displaying sequential images, such as moving images, at a high speed. The method is an interlaced scanning method in which a single frame is divided into an odd-numbered field and an even-numbered field that are sequentially driven, and includes dividing each of the odd-numbered field and the even-numbered field into x sub-frame groups; dividing each of a plurality of sub-frames corresponding to bits of driving data into y divided sub-frame portions; and disposing the y divided sub-frame portions in different ones of the x sub-frame groups. | 12-25-2008 |
| 20090027375 | Power source, display including the same, and associated method - A power source for applying a voltage to a pixel circuit, the power source including a sensing unit and a controlling unit. The sensing unit senses a current flowing through a power line coupled to the pixel circuit, the controlling unit increases a voltage applied to the power line by a first amount when the sensed current is lower than a reference, and the controlling unit decreases the voltage applied to the power line by a second amount when the sensed current is higher than the reference, the second amount being different from the first amount. | 01-29-2009 |
| 20090146978 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - An organic light emitting display capable of preventing data collision to improve picture quality. The organic light emitting display includes pixels positioned at crossings between scan lines and data lines, a scan driver for driving the scan lines, a data driver for driving the data lines, a timing controller for controlling the scan driver and the data driver, and an input controller for receiving data and an input clock, and for controlling a point in time where the data is supplied to the timing controller in response to at least one clock signal supplied from the timing controller. | 06-11-2009 |
