Patent application number | Description | Published |
20090309503 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel for compensating for the threshold voltage of a drive transistor and the voltage drop of a first power source is provided. The pixel includes an organic light emitting diode; a driving transistor coupled between a first power source and the organic light emitting diode for controlling the current supplied to the organic light emitting diode; an emission control transistor coupled between a first electrode of the driving transistor and the first power source and configured to be turned off when a high light emission control signal is applied; a switching transistor coupled between a gate electrode of the driving transistor and a data line and configured to be turned on when a low scan signal is applied; a first capacitor coupled between the gate electrode of the driving transistor and the first electrode of the driving transistor; and a second capacitor coupled between the first electrode of the driving transistor and the first power source. | 12-17-2009 |
20090309516 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel capable of compensating for the threshold voltage of a driving transistor, the voltage drop of a first power source and degradation of an organic light emitting diode is provided. The pixel includes an organic light emitting diode; a second transistor (e.g., a driving transistor) coupled between the first power source and the organic light emitting diode to control the current supplied to the organic light emitting diode; a third transistor coupled between a first electrode of the second transistor and the first power source; a first transistor coupled between a gate electrode of the second transistor and a data line; a first capacitor coupled between the gate electrode and the first electrode of the second transistor; a second capacitor coupled between the first electrode of the second transistor and the first power source; and a compensation circuit coupled between the organic light emitting diode and the gate electrode of the second transistor for adjusting a voltage of the gate electrode of the second transistor in accordance with degradation of the organic light emitting diode. | 12-17-2009 |
20100007651 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel circuit coupled to a data line, a scan line, an emission control line, a power supply, a reference power source, and a light emitting element, includes: a data switch coupled between the data line and a first node, and having a control electrode coupled to the scan line; a reference switch coupled between the reference power source and a second node, and having a control electrode coupled to the scan line; a capacitor coupled between the first node and the second node; a driving transistor coupled between the power supply and the light emitting element, and having a gate electrode coupled to the second node; and an emission control switch coupled between the power supply and the first node, and having a control electrode coupled to the emission control line. | 01-14-2010 |
20100188391 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME - An organic light emitting display device includes a pixel unit that displays an image corresponding to an amount of driving current flowing from a first power supply to a second power supply, wherein the pixel unit includes a pixel that is formed at an intersection portion of a scan line transferring a scan signal and a data line transferring a data signal. The pixel electrode further includes organic light emitting diodes emitting light according to the driving current, and controlling the magnitude of the driving current by controlling a voltage of the data signal corresponding to voltages from the first power supply and the second power supply and a voltage formed on the organic light emitting diode; a first wire transferring the first power to the pixel in a first direction; and a second wire transferring the first power to the pixel in a second direction, wherein the first wire and the second wire are formed to have a thickness thicker in the mid-portion of the pixel unit and is thinner in an outer-portion of the pixel unit, and a method of manufacturing the same. | 07-29-2010 |
20100253608 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A display device displays an image having a substantially uniform brightness by compensating for variations of the threshold voltages of driving transistors and compensating for the deterioration of an organic light emitting diode. A pixel includes an organic light emitting diode, two transistors, a storage capacitor, and a compensation unit. A driving transistor supplies a current to an OLED corresponding to the voltage in the storage capacitor. The compensation unit controls a voltage of a gate electrode of the driving transistor corresponding to a deterioration of the organic light emitting diode, and couples one electrode of the driving transistor to the data line during a compensation period, during which a threshold voltage of the driving transistor is compensated. | 10-07-2010 |
20110050674 | ORGANIC LIGHT EMITTING DISPLAY AND IMAGE COMPENSATING METHOD THEREOF - An organic light emitting display device and a method of compensating image of the organic light emitting display device. The organic light emitting display device includes a sensing circuit that is separate from a pixel circuit to sense a current supplied by a driving transistor. Accordingly, mura, spots, or image sticking generated due to deterioration of the driving transistor may be compensated for. | 03-03-2011 |
20110084955 | ORGANIC LIGHT EMITTING DISPLAY - An organic light emitting display is capable of displaying an image with desired brightness regardless of the deterioration of organic light emitting diodes (OLED) and the voltage reduction of a first power source. The organic light emitting display includes pixels positioned at crossing regions of scan lines, emission control lines, sensing lines, and data lines, a sensor for extracting information from the pixels on deterioration of organic light emitting diodes (OLEDs) and information on threshold voltages and mobilities of transistors of the pixels, a converter for changing supplied data to generate corrected data using the information on the deterioration of the OLEDs and the information on the threshold voltages and mobilities of the driving transistors, and a data driver for generating data signals to be supplied to the data lines using the corrected data. | 04-14-2011 |
20110084959 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel of an organic light emitting display includes an OLED having a cathode electrode coupled to a second power source, a second transistor having a second electrode coupled to an anode electrode of the OLED, the second transistor being for supplying current to the OLED, a first transistor coupled between a data line and a gate electrode of the second transistor, the first transistor configured to turn on when a scan signal is supplied to a scan line, a third transistor coupled between a first electrode of the second transistor and a first power source, the third transistor configured to turn off when an emission control signal is supplied to an emission control line, and a storage capacitor coupled between the gate electrode and first electrode of the second transistor. The voltage of the data signal is equal to or lower than a threshold voltage of the OLED. | 04-14-2011 |
20110108844 | ORGANIC LIGHT EMITTING DISPLAY - An organic light emitting display (OLED) is disclosed. The OLED includes a storage capacitor formed in a first region of the substrate, a thin film transistor formed in a second region of the substrate, a first data line capacitor formed in a third region of the substrate, an organic light emitting diode formed on the storage capacitor and the thin film transistor, and a second data line capacitor formed on the data line capacitor. | 05-12-2011 |
20110109660 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device includes: pixels at crossing regions of scan lines, light emission control lines, sensing lines, and data lines; a sensor configured to extract deterioration information from organic light emitting diodes included in the pixels during a first sensing period and to extract threshold voltage and mobility information of driving transistors included in the pixels during a second sensing period; a converter configured to generate corrected data by changing input data based on the deterioration information and the threshold voltage and mobility information; and a data driver configured to supply data signals, the data signals being based on the corrected data during a driving period and being reference data signals during the second sensing period, wherein the sensor is configured to extract the threshold voltage and mobility information of the driving transistors using second electric currents from the pixels in response to the reference data signals. | 05-12-2011 |
20110164015 | ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device for transmitting data using demultiplexers is provided. The organic light emitting display device includes: a demultiplexer controller for sequentially supplying control signals during a first period of a horizontal period; scan lines for transferring a scan signal; a scan driving unit for supplying the scan signal to the scan lines during a second period of the horizontal period; output lines for transferring data signals; a data driving unit for sequentially supplying the data signals to respective output lines during the first period; data lines for transferring the data signals; demultiplexers coupled to the respective output lines, for delivering the data signals to the data lines in response to the control signals; an initializing unit coupled to the data lines and an initial power source; and pixels located at crossing regions of the scan lines and the data lines. | 07-07-2011 |
20120026146 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - A pixel to compensate for the deterioration of an organic light emitting diode, the pixel including an organic light emitting diode; a pixel circuit including a driving transistor controlling an amount of current supplied to the organic light emitting diode; and a compensator compensating for the deterioration of the organic light emitting diode by using on-voltage applied when current flows in the organic light emitting diode and off-voltage applied when current does not flow in the organic light emitting diode; wherein the compensator includes: a compensating capacitor having a second terminal connected to a gate electrode of the driving transistor; and a first compensating transistor connected between a first terminal of the compensating capacitor and an anode electrode of the organic light emitting diode. | 02-02-2012 |
20120062545 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device and a driving method thereof are provided. The display device includes: a display unit including a plurality of pixels; a scan driver for transmitting scan signals to the plurality of pixels; a data driver for transmitting data signals to the plurality of pixels; and an initialization control driver for generating and transmitting an initialization signal to initialize data voltages corresponding to the data signals of a previous frame charged in the plurality of pixels during a first period of one frame. | 03-15-2012 |
20130002133 | FLEXIBLE DISPLAY PANEL AND DISPLAY APPARATUS INCLUDING THE FLEXIBLE DISPLAY PANEL - A flexible display panel including: a flexible substrate including a first region, second regions that extend from the first region and that have a curved surface, and a third region folded towards the second regions; a first display region in the first region of the flexible substrate; a second display region in the second regions of the flexible substrate; a plurality of non-display regions outside the first display region or the second display regions, wherein at least one of the plurality of non-display regions is in the third region of the flexible substrate; and an encapsulation member for encapsulating the first display region and the second display regions. | 01-03-2013 |
20130002572 | FLEXIBLE DISPLAY PANEL AND DISPLAY APPARATUS INCLUDING THE FLEXIBLE DISPLAY PANEL - A flexible display panel includes a flexible substrate including a first region including a display region and having a curved display surface, and a plurality of non-display regions that is located outside the display region and including a second region located outside the first region and folded in a direction different from a display direction of the first region, and an encapsulation member for encapsulating the display region along the curved display surface. | 01-03-2013 |
20130002583 | FLEXIBLE DISPLAY PANEL AND DISPLAY APPARATUS INCLUDING THE FLEXIBLE DISPLAY PANEL - A flexible display panel including: a flexible panel including a first region including a display region and oriented on a first plane and a second region including a non-display region and oriented on a second plane different from the first plane; and a flexible encapsulation member disposed on the flexible panel so as to encapsulate at least the display region. | 01-03-2013 |
20130335397 | ORGANIC LIGHT EMITTING DIODE DISPLAY - A display including: pixels; a gate driver for supplying a gate signal to gate lines; a lighting test circuit coupled to a first input line (for transmitting a lighting test signal), and a second input line (for transmitting a test control signal), the light test circuit being for supplying the lighting test signal to data lines according to the test control signal; a first power supply line for supplying a gate high level voltage to the gate driver and at a periphery of the gate driver and the lighting test circuit; and a second power supply line for supplying a gate low level voltage to the gate driver and at a periphery of the gate driver and the lighting test circuit. The second input line is coupled to the first power supply line or the second power supply line through a resistor. | 12-19-2013 |
20140062982 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel capable of realizing desired brightness and of displaying a uniform image is disclosed. In one aspect, the pixel includes an organic light emitting diode (OLED), a first transistor having a second electrode thereof coupled to an anode electrode of the OLED to control an amount of current supplied to the OLED in response to a voltage applied to a gate electrode thereof. The pixel also includes at least one second transistor coupled between the second electrode and the gate electrode of the first transistor, and a third transistor coupled between the second transistor and the gate electrode of the first transistor. The third transistor is turned off in a partial period of a period in which the second transistor is turned on. | 03-06-2014 |
20140071029 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME - There are provided a pixel and an organic light emitting display device using the same capable of improving image quality. A pixel includes an organic light emitting diode, a first transistor, a second transistor and a second capacitor. The first transistor controls the amount of current supplied from a first power to the organic light emitting diode coupled to a second electrode of the first transistor, corresponding to a voltage applied to a second node. The second transistor is coupled between the second electrode of the first transistor and the second node so as to be turned on when a scan signal is supplied to a scan line. The second capacitor is coupled between the second electrode of the first transistor and a control line. | 03-13-2014 |
20140071176 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - An organic light emitting display device capable of improving image quality. A driving method of an organic light emitting display device in which a plurality of sub-fields may be included in one frame, wherein a first sub-field includes an initialization period in which voltage of an initialization power supply is supplied to a gate electrode of a driving transistor included in each of the pixels, a scan period that voltage corresponding to a data signal is stored in the pixels, and a light emitting period that the pixels emit light, and wherein the remaining sub-fields with the exception of the first sub-field include only a scan period and a light emitting period. | 03-13-2014 |
20140078031 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - A method of driving an organic light emitting display includes dividing one frame into a plurality of subfields, setting a plurality of pixels to include first pixels positioned in odd horizontal lines and second pixels positioned in even horizontal lines, and setting pixels that realize low grayscales in an emission state in one of the plurality of subfields, such that the first pixels have emission states in different subfields than emission states of the second pixels, when the low grayscales are realized. | 03-20-2014 |
20140104741 | CIRCUIT FOR PREVENTING STATIC ELECTRICITY OF A DISPLAY PANEL AND DISPLAY DEVICE INCLUDING THE SAME - A static electricity preventing circuit and a display device including the same are disclosed. In one aspect, the static electricity preventing circuit includes a power source voltage supply unit configured to apply a power source voltage to drive a display panel, wherein the display panel comprises a plurality of pixels respectively displaying images through light emission according to data voltages of image data signals. It also includes a signal wire unit configured to transmit lighting test signals for a lighting test of the pixels included in the display panel. It further includes a resistor unit positioned between the power source voltage supply unit and the signal wire unit and configured to discharge static electricity generated in the signal wire unit through the power source voltage supply unit. | 04-17-2014 |
20140111092 | EMISSION CONTROL LINE DRIVER - Each stage of an emission control line driver includes a first transistor connected to a first node, a first power source, and a first output terminal; a second transistor connected to second node, the first output terminal, and a second power source; a third transistor connected to a second input terminal, a first input terminal, and the first node; a fourth transistor connected to the first node, the first power source, and the second node; a first controller connected to the first to third input terminals to supply sampling signal to a second output terminal; and a second controller connected to the second input terminal and a fourth input terminal to control the voltage of the second node. The first controller includes a fifth transistor connected between the first power source and the second output terminal, and to the second controller or the first output terminal via a protection unit. | 04-24-2014 |
20140124751 | ORGANIC LIGHT EMITTING DIODE DISPLAY AND MANUFACTURING METHOD THEREOF - An organic light emitting diode display and a method of manufacturing the same, the display including a substrate; a plurality of thin film transistors on the substrate; a protective film covering the plurality of thin film transistors; a pixel electrode on the protective film; a pixel defining film on the protective film, the pixel defining film having an opening exposing the pixel electrode; an organic emission layer on the pixel electrode and the pixel defining film; and a common electrode covering the organic emission layer, wherein a cross-section of an opening sidewall of the opening in the pixel defining film has a rounded shape. | 05-08-2014 |
20140152639 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD FOR OPERATING THE SAME - An organic light emitting display device includes: a pixel unit including first pixels positioned at intersection parts between first data lines and first scan lines and the second pixels positioned at intersection parts between the second data lines and the second scan lines; a scan driver sequentially supplying first scan signals to the first scan lines and sequentially supplying second scan signals to the second scan lines; a data driver supplying first output signals to first output lines and supplying second output signals to second output lines; and a demultiplexer block unit including demultiplexers which demultiplex the first output signals in response to control signals, respectively, and supply the demultiplexed signals to the first data lines, wherein the second output lines are directly connected to the second data lines. | 06-05-2014 |
20140191931 | FLAT PANEL DISPLAY DEVICE - A flat panel display device includes a pixel unit having scan-lines, data-lines, and first through third pixels that are coupled to the scan-lines and the data-lines, a scan driver that applies a scan signal to the pixel unit, a data driver that selectively applies a first data signal, a second data signal, a third data signal, and an initialization signal to the pixel unit, a demultiplexing unit having at least one demultiplexer that applies the first data signal, the second data signal, and the third data signal to the first pixels, the second pixels, and the third pixels, respectively, and that simultaneously applies the initialization signal to the first through third pixels, and a timing control unit that controls the scan driver, the data driver, and the demultiplexing unit. | 07-10-2014 |
20140203262 | ORGANIC LIGHT EMITTING DISPLAY - An organic light emitting display (OLED) is disclosed. The OLED includes a storage capacitor formed in a first region of the substrate, a thin film transistor formed in a second region of the substrate, a first data line capacitor formed in a third region of the substrate, an organic light emitting diode formed on the storage capacitor and the thin film transistor, and a second data line capacitor formed on the data line capacitor. | 07-24-2014 |
20140301044 | FLEXIBLE DISPLAY DEVICE - A flexible display device including a display area for displaying an image and a non-display area neighboring the display area includes: a flexible substrate including a plurality of chamfers on respective ends corresponding to the non-display area; a display provided on the flexible substrate corresponding to the display area and displaying the image; and a driver provided on the flexible substrate corresponding to the non-display area and connected to the display. | 10-09-2014 |
20140368414 | CAPACITOR, DRIVING CIRCUIT COMPRISING THE CAPACITOR, AND DISPLAY DEVICE COMPRISING THE DRIVING CIRCUIT - According to exemplary embodiments of the present disclosure, a capacitor may be connected to a gate electrode of a transistor. The capacitor includes a first gate electrode connected to the gate electrode of the transistor, a gate insulation layer formed on the first gate electrode, and an upper electrode formed on the gate insulation layer. The upper electrode is formed to cover a region where the first gate electrode and the upper electrode are overlapped. The capacitor is applicable to at least one of a light emitting driving circuit and a scan driving circuit, and at least one of the light emitting driving circuit and the scan driving circuit may be included in a display device. | 12-18-2014 |
20150028303 | ORGANIC LIGHT-EMITTING DISPLAY APPARATUS AND MANUFACTURING METHOD THEREOF - An improved organic light-emitting display apparatus prevents damage of wiring due to a mask during the manufacturing process, and a manufacturing method thereof. An organic light-emitting display apparatus includes a display unit formed on a substrate, a pad unit formed at one outer side of the display unit on the substrate, a wiring unit formed as a multilayer structure on the substrate to couple the display unit to the pad unit, a thin film encapsulating layer covering the display unit, and a protrusion unit that does not overlap the uppermost layer of wiring of the multilayered wiring unit. | 01-29-2015 |
20150041791 | ORGANIC LIGHT EMITTING DIODE DISPLAY - An organic light emitting diode (OLED) display includes a substrate including a pixel area and a surrounding peripheral area. The pixel area includes at least one pixel including an organic light emitting element. The OLED display includes a common voltage line disposed in the peripheral area and configured to transmit a common voltage to the pixel area, a barrier rib disposed on the substrate and covering one side of the common voltage line, a protection member covering another side of the common voltage line, at least one thin film transistor (TFT) disposed in the pixel area, a first electrode disposed in the pixel area and connected to the at least one TFT, an organic emission layer disposed on the first electrode, a second electrode disposed on the organic emission layer and connected to the common voltage line, and an encapsulation layer disposed on the protection member and the second electrode. | 02-12-2015 |
20150061983 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - An organic light emitting display device includes a plurality of pixels, a data driver, and a plurality of demultiplexers. The pixels are in an area defined by scan lines and data lines. The data driver progressively supplies data signals to output lines every horizontal period. The demultiplexers are coupled to respective ones of the output lines. Each demultiplexer supplies data signals to a first number of data lines coupled to the demultiplexer during a horizontal period. | 03-05-2015 |
20150084003 | ORGANIC LIGHT EMITTING DIODE DISPLAY - An organic light emitting diode (OLED) display, including a flexible substrate bent in a first direction, an OLED arranged on the flexible substrate, a first thin film transistor connected to the OLED and including a first channel area extending in a second direction crossing the first direction, and one or more additional thin film transistors connected to the first thin film transistor and including corresponding additional channel areas extending in the second direction. | 03-26-2015 |