Patent application number | Description | Published |
20080231562 | Organic light emitting display and driving method thereof - An organic light emitting display capable of displaying images of uniform luminance and a method for driving the display are disclosed. The display senses degradation of the organic light emitting diode and threshold and/or mobility of a drive transistor and modifies the data supplied to the pixel according to the sensed parameters. | 09-25-2008 |
20080252568 | Organic light emitting display and driving method thereof - An organic light emitting display capable of displaying an image with uniform luminance regardless of deterioration of an organic light emitting diode and threshold voltage and/or mobility of a drive transistor is disclosed. The organic light emitting display senses deterioration of the organic light emitting diode and threshold voltage and/or mobility of a drive transistor and modifies the data supplied to the pixel according to the sensed parameters. | 10-16-2008 |
20080252569 | Organic light emitting display and driving method thereof - An organic light emitting display capable of displaying an image with uniform luminance regardless of deterioration of an organic light emitting diode and threshold voltage and/or mobility of a drive transistor is disclosed. The organic light emitting display senses deterioration of the organic light emitting diode and threshold voltage and/or mobility of a drive transistor and modifies the data supplied to the pixel according to the sensed parameters. | 10-16-2008 |
20080252570 | Organic light emitting display and driving method thereof - An organic light emitting display capable of displaying an image with uniform luminance regardless of deterioration of an organic light emitting diode and threshold voltage/mobility of a drive transistor is disclosed. The organic light emitting display senses deterioration of the organic light emitting diode and the threshold voltage and/or mobility of a drive transistor and modifies the data supplied to the pixel according to the sensed parameters. | 10-16-2008 |
20080291190 | SOURCE DRIVER AND DISPLAY DEVICE HAVING THE SAME - A source driver includes a gamma reference voltage generating unit and a gamma signal supplying unit. The gamma reference voltage generating unit generates a plurality of gamma reference voltages in response to a gamma control signal. The gamma signal supplying unit is integrated into a display panel and provides a gamma signal to data lines of the display panel using the gamma reference voltages. | 11-27-2008 |
20090051628 | ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting display device includes: a plurality of pixels at crossing portions of data lines, scan lines, and emission control lines; a sensor for sensing degradation information of organic light emitting diodes and mobility information of driving transistors, which are included in each pixel; a converter for storing the degradation information of organic light emitting diodes and the mobility information of driving transistors, which are sensed utilizing the sensor and converting input data to corrected data by utilizing the stored information; and a data driver receiving the corrected data and generating data signals to be supplied. | 02-26-2009 |
20090184896 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - There is provided an organic light emitting display capable of compensating for the deterioration of organic light emitting diodes (OLED) while sharing an analog-to-digital converter (ADC). The organic light emitting display includes sub pixels positioned in the intersections between scan lines and data lines, a current source unit for supplying predetermined current to organic light emitting diodes (OLED) in a sensing period for grasping deterioration information on the OLEDs included in the sub pixels, at least one analog-to-digital converter (ADC) provided fewer than data lines in order to convert a voltage applied to the OLEDs into a digital signal, and a switching unit for coupling the data lines to the current source unit in the sensing period and for sequentially coupling at least one ADC to the data lines in the sensing period. | 07-23-2009 |
20090184901 | ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting display includes a pixel unit including a plurality of pixels arranged at intersecting points of data lines, scan lines and light emitting control lines; a temperature sensor provided to measure a temperature of the pixel unit; a first analog/digital converter (first ADC) to convert information of the temperature measured in the temperature sensor into a first digital value; a controller to receive the first digital value outputted from the first ADC and outputting a control signal corresponding to the received first digital value; a sensing unit to extract a degradation level of an organic light emitting diode included in each of the pixels; a second analog/digital converter (second ADC) to receive information of the degradation of the organic light emitting diode extracted from the sensing unit and a control signal outputted from the controller and generating a second digital value corresponding to the information of the degradation of the organic light emitting diode that is varied according to the temperature; a conversion unit to convert an input data (Data) into a correction data (Data′) so as to display an image having uniform luminance regardless of the changes in the degradation level of the organic light emitting diode according to temperature, by using the second digital value outputted from the second ADC; a data driver to receive the correction data (Data′) outputted from the conversion unit and generating data signals to be supplied to the pixels. | 07-23-2009 |
20090184903 | ORGANIC LIGHT EMITTING DISPLAY AND DRIVING METHOD THEREOF - An organic light emitting display includes a plurality of pixels arranged at intersecting points of data lines, scan lines and light emitting control lines; a sensing unit extracting a signal corresponding to a degradation level of organic light emitting diodes provided in each of the pixels; a storage unit storing the signal obtained from the sensing unit, calculating degradation level information of the organic light emitting diodes using the stored signal and storing the calculated information; a conversion unit for converting an input data (Data) into a correction data (Data′) using the degradation level information stored in the storage unit; and a data driver for receiving the correction data (Data′) outputted from the conversion unit and generating data signals to be supplied to the circuits. | 07-23-2009 |
20090257537 | DATA RECOVERY CIRCUIT OF SEMICONDUCTOR MEMORY APPARATUS THAT MINIMIZES JITTER DURING DATA TRANSMISSION - A data recovery circuit that minimizes jitter during data transmission is presented. The data recovery circuit includes a data dividing unit, a data sampling unit, a data selecting unit, and a data recovery unit. The data dividing unit is for dividing external data to generate multiple-division data. The data sampling unit is for sampling the multiple-division data at a first time and a second time to generate sampling data. The data selecting unit is for selecting one of the data sampled at the first time or the second time from the sampling data in accordance to whether the sampling data is transited to output the selected one as selection data. The data recovery unit is for recovering the selection data to internal data in the same logic level as the logic level of the external data. | 10-15-2009 |
20100073335 | DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - The present invention provides a display device and a method of driving the same. The display device includes a plurality of display pixels to display an image, a plurality of data lines connected to the display pixel, and a plurality of sensing lines connected to the display pixel. Each display pixel includes: a driving transistor including a control terminal, an input terminal, and an output terminal; a capacitor connected to the control terminal of the driving transistor; a first switching transistor connected to the data line and the control terminal of the driving transistor; a light-emitting element to receive a driving current from the driving transistor, the light-emitting element to emit light; a second switching transistor connected between the sensing line and the output terminal of the driving transistor; and a third switching transistor connected between the output terminal of the driving transistor and the light-emitting element, wherein the driving transistor is a p-channel electric field effect transistor. | 03-25-2010 |
20100073346 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - The present invention relates to a display device and a driving method thereof. The display device includes a plurality of display pixels, a plurality of data lines connected to the plurality of display pixels, and a plurality of sensing lines connected to the display pixels. Each display pixel includes a driving transistor having an input terminal, a control terminal, and an output terminal, a capacitor connected to the control terminal, a first switching transistor connected to the data line and the control terminal, a light emitting element receiving a driving current from the driving transistor and emitting light, a second switching transistor connected to the sensing lines and the output terminal, and a third switching transistor connected between the output terminal and the light-emitting element. | 03-25-2010 |
20100073357 | DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A display device and a method of driving the same are provided. The display device includes a plurality of display pixels, a plurality of data lines that are connected to the display pixels, and a plurality of sensing lines that are connected to the display pixels. Each display pixel includes: a driving transistor that has a control terminal, an input terminal, and an output terminal; a capacitor that is connected to the control terminal of the driving transistor; a first switching transistor that is connected to the data line and the control terminal of the driving transistor; a light-emitting element that receives a driving current from the driving transistor to emit light; a second switching transistor that is connected between the sensing line and the light-emitting element; and a third switching transistor that is connected between the output terminal of the driving transistor and the light-emitting element. | 03-25-2010 |
20100079361 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - In a pixel of a display device, a first transistor of which an second terminal is connected to a first terminal of a light emitting element supplies a driving current that corresponds to a voltage between a control terminal and the second terminal to the light emitting element, and a second terminal of the light emitting element is connected to a driving voltage. At least one second transistor transmits a black voltage that corresponds to a black gray to the control terminal of the first transistor in a first period and a second period, and transmits a gray voltage that corresponds to an input image signal to the control terminal of the first transistor in a third period. A third transistor is connected between the first terminal of the light emitting element and a voltage supply line to transmit a reference voltage, and the third transistor is turned on in the first period and turned off in the second period. A capacitor is connected between the control terminal and the source of the first transistor, stores a control voltage based on a threshold voltage of the first transistor in the second period, and stores a voltage based on the control voltage and the gray voltage in the third period. | 04-01-2010 |
20100141639 | Source Driver and Display Device Having the Same - A source driver and a display device having the same are provided. The source driver shares several outputs by using a time division method and has an analog voltage stored in a buffer supplied to each data line multiple times during a horizontal scanning interval. Accordingly, by supplying an analog voltage to a data line a first time in a first activation interval and supplying an analog voltage to a data line a second time in a second activation interval, a target voltage of each pixel may be achieved quickly and accurately. | 06-10-2010 |
20100188320 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - The present invention relates to a structure and a method of a pixel and a data driver to measure degradation of an organic light emitting element, and a threshold voltage and mobility of a driving transistor in an organic light emitting device such that degradation of the organic light emitting element and the threshold voltage and mobility of the driving transistor are measured in a turn-on interval of the display device and a data voltage applied to the pixel is amended, and thereby images of improved and uniform quality may be displayed. | 07-29-2010 |
20100188390 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - The present invention relates to a pixel and a data driver, and a driving method thereof to measure degradation of an organic light emitting element and a threshold voltage and mobility of a driving transistor in an organic light emitting device, wherein the degradation of the organic light emitting element and the threshold voltage and the mobility of the driving transistor are measured in a turn-on interval or a frame interval of the display device to amend the data voltage applied to the pixel, and thereby images of improved and uniform quality may be displayed. | 07-29-2010 |
20100207967 | HYBRID DIGITAL TO ANALOG CONVERTER, SOURCE DRIVER, AND LIQUID CRYSTAL DISPLAY DEVICE - A hybrid digital to analog converter (DAC) includes a first digital to analog converting unit (DACU) and a second DAC unit. The first DAC unit provides an analog voltage corresponding to Q-bit upper data of P-bit gray data, in response to a plurality of gamma voltages, where P is a natural number equal to or greater than 10 and Q is a natural number less than 10. The second DAC unit provides an analog current having a magnitude according to each bit level of R-bit lower data of the P-bit gray data, based on a rated current generated from a reference voltage, where R is a natural number corresponding to P-Q. | 08-19-2010 |
20100231787 | SIGNAL PROCESSING METHOD AND DEVICE - A signal processing method includes recovering a clock signal from a clock stream included in an input serial data stream, recovering at least one control signal from a data pattern included in the serial data stream based on the recovered clock signal, and recovering RGB data from an RGB data stream included in the serial data stream based on the recovered clock signal. | 09-16-2010 |
20110109585 | TOUCH SCREEN AND METHOD FOR COMPENSATING SENSING CAPACITANCE VARIATIONS AND OFFSET VARIATIONS THEREOF - Provided are a touch screen and a method for compensating sensing capacitance variations and offset variations thereof. The touch screen includes: a touch panel where a plurality of driving lines and a plurality of sensing lines intersect and are wired; a driving unit for activating the driving lines sequentially; an input unit for measuring a sensing capacitance formed in a sensing line corresponding to an activated driving line; a multiplexer for serializing and outputting the measured sensing capacitance; an analog-to-digital converter for sampling the sensing capacitance outputted from the multiplexer by reflecting an initial sensing capacitance as an offset and performing analog-to-digital conversion for the sampling result; and a host processor for determining a touch event in response to the analog-to-digital conversion result. | 05-12-2011 |
20120280634 | PIXEL - Disclosed is a pixel capable of finely controlling the amount of current and increasing the voltage range of a data signal. A pixel includes an organic light emitting diode, a first transistor, a storage capacitor, a load and an amplifier. The first transistor is coupled between a scan line and a data line, and supplies a data signal supplied to the data line to a first node when a scan signal is supplied to the scan line. The storage capacitor is coupled between the first node and a first power source, and charges a voltage corresponding to the data signal. The load is coupled between the organic light emitting diode and the first power source. The amplifier controls a voltage applied to the load corresponding to the voltage charged in the storage capacitor. | 11-08-2012 |
20120316437 | APPARATUS FOR DRIVING TWO-DIMENSIONAL TRANSDUCER ARRAY, MEDICAL IMAGING SYSTEM, AND METHOD OF DRIVING TWO-DIMENSIONAL TRANSDUCER ARRAY - An apparatus for driving a two-dimensional transducer array, a medical imaging system and a method of driving a two-dimensional transducer array are provided. An apparatus for driving a two-dimensional (2D) transducer array including one or more transducers includes one or more drivers configured to respectively drive the transducers, each of the drivers including a register, a comparator, a pulse frequency setter, a multi-pulse controller, a transmission signal generator, a signal transceiver, a transmission and reception switch, and a reception signal amplifier, and a driving controller configured to control the drivers. | 12-13-2012 |
20130002643 | DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A display device and a method of driving the same are provided. The display device includes a plurality of display pixels, a plurality of data lines that are connected to the display pixels, and a plurality of sensing lines that are connected to the display pixels. Each display pixel includes: a driving transistor that has a control terminal, an input terminal, and an output terminal; a capacitor that is connected to the control terminal of the driving transistor; a first switching transistor that is connected to the data line and the control terminal of the driving transistor; a light-emitting element that receives a driving current from the driving transistor to emit light; a second switching transistor that is connected between the sensing line and the light-emitting element; and a third switching transistor that is connected between the output terminal of the driving transistor and the light-emitting element. | 01-03-2013 |
20130033613 | ANALOG-TO-DIGITAL CONVERTER, IMAGE SENSOR INCLUDING THE SAME, AND APPARATUS INCLUDING IMAGE SENSOR - The analog-to-digital converter includes a signal processing unit generating an operational amplifier output voltage in response to an input voltage and a DAC output voltage in a first period and generating the operational amplifier output voltage in respose to a feedbacked operational amplifier output voltage and the DAC output voltage in a second period; a control unit generating a DAC control signal by comparing the operational amplifier output voltage with a first reference voltage to obtain high order M-bits of data in the first period, and generating the DAC control signal by comparing the operational amplifier output voltage with second and third reference voltages to obtain low order N-bits of data in the second period; and a digital analog converter generating the DAC output voltage in response to the DAC control signal. | 02-07-2013 |
20130038570 | APPARATUS FOR DRIVING TOUCH PANEL AND DISPLAY APPARATUS COMPRISING THE SAME - Disclosed are a touch panel driving apparatus and a display device including the same, which lead to the enhancement of sensing sensitivity. The touch panel driving apparatus includes a touch control unit and a touch sensing unit. The touch sensing unit is connected to the receiving lines, and generates the digital touch information on the basis of change of a capacitance between two transmitting lines and one receiving line or generates the digital touch information on the basis of change of a capacitance of each of the receiving lines to supply the digital touch information to the touch control unit, according to the sensing control signal. | 02-14-2013 |
20130113518 | MAJORITY DECISION CIRCUIT - A majority decision circuit includes: a majority decision unit configured to compare first data with second data to decide whether one of the first data and the second data has more bits with a first logical value; and an offset application unit configured to control the majority decision unit so that the majority decision unit decides, in a case when the number of bits with the first logical value among the first data is equal to the number of bits with the first logical value among the second data, that the first data have more bits with the first logical value if offset is a first setting value in a first phase and decides that the second data have more bits with the first logical value if the offset is a second setting value in a second phase. | 05-09-2013 |
20130222348 | ORGANIC LIGHT EMITTING DISPLAY AND METHOD OF DRIVING THE SAME - A method of driving an organic light emitting display capable of providing a sufficient (e.g., a sufficiently long) data writing period and/or threshold voltage compensating period is provided. The method includes supplying scan signals to odd scan lines in a writing period of an odd frame set to be in a non-emission state, and supplying scan signals to even scan lines in a writing period of an even frame set to be in the non-emission state. | 08-29-2013 |
20130222356 | PIXEL AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME - A pixel having a simplified structure can compensate for the threshold voltage of a driving transistor thereof. The pixel includes an organic light emitting diode (OLED) having a cathode electrode coupled to a second power source, a storage capacitor coupled between a data line and a first node, a second transistor having a first electrode coupled to a first power source, a second electrode coupled to an anode electrode of the OLED, and a gate electrode coupled to the first node, a first transistor coupled between the first node and the second electrode of the second transistor, a gate electrode of the first transistor being coupled to a current scan line, and a third transistor coupled between the second electrode of the second transistor and the anode electrode of the OLED, a gate electrode of the third transistor being coupled to a control line. | 08-29-2013 |
20140062752 | ANALOG-TO-DIGITAL CONVERTER AND ANALOG-TO-DIGITAL CONVERSION METHOD USING THE SAME - An analog-to-digital converter includes a comparison unit that outputs a result obtained by comparing a voltage of an input node with a comparison voltage; 1 | 03-06-2014 |
20140292550 | ANALOG-TO-DIGITAL CONVERSION CIRCUIT, ANALOG-TO-DIGITAL CONVERSION METHOD, AND IMAGE SENSOR - An analog-to-digital conversion circuit includes an analog-to-digital conversion unit configured to analog-to-digital convert an input voltage and generate a digital signal, a resolution control unit configured to: set a resolution of the analog-to-digital conversion unit to N (N is the natural number) bits, in a case where the input voltage is smaller than a first voltage, and set the resolution of the analog-to-digital conversion unit to N−M (1≦M10-02-2014 | |
20150042383 | STAGE CIRCUIT AND SCAN DRIVER USING THE SAME - A stage circuit includes a first driver, a second driver, a first output unit and a second output unit. The first driver controls voltages of first and second nodes, according to a first power source, a start signal or a carry signal of a previous stage supplied to a first input terminal, a first clock signal supplied to a second input terminal, and a second clock signal supplied to a third input terminal. The second driver controls a voltage of a third node, according to the first power source, a start signal or a carry signal of a previous stage supplied to a first input terminal, a carry signal of a next stage supplied to a fourth input terminal, and the voltage of the second node. | 02-12-2015 |
20150042387 | DATA RECOVERY CIRCUIT AND OPERATING METHOD THEREOF - A data recovery circuit may include a data sampling unit suitable for sampling source data including an edge data using data clocks and an edge clock, a data extraction unit suitable for extracting the edge data from sampled data outputted from the data sampling unit, a control signal generation unit suitable for generating a phase control signal in response to the edge data, and a multi-clock control unit suitable for controlling phases of the data clocks and the edge clock in response to the phase control signal. | 02-12-2015 |
20150042547 | GATE DRIVER AND DISPLAY APPARATUS HAVING THE SAME - A gate driver, including multiple stages of gate driving circuits, wherein each stage of the gate driving circuits includes an input part configured to generate a Q node signal in response to a carry signal of one of previous stages and a clock signal, the Q node signal being applied to Q node, an output part configured to output a gate output signal to a gate output terminal in response to the Q node signal, and a charge sharing part connected to the gate output terminal of a present stage and a gate output terminal of one of next stages, the charge sharing part configured to operate charge-sharing between the gate output signal of the present stage and a gate output signal of one of the next stages in response to a select signal. | 02-12-2015 |
20150042638 | STAGE CIRCUIT AND SCAN DRIVER USING THE SAME - A stage circuit includes a first driver, a second driver, a first output unit, a second output unit and a controller. The first driver controls voltages of first and second nodes, according to a first power source, a third power source, a start signal or a carry signal of a previous stage input to a first input terminal, and a clock signal supplied to a second input terminal. The second driver controls voltages of third and fourth nodes, according to voltages of the first power source, the third power source, the first input terminal and the first and second nodes. The first output unit outputs a carry signal to a first output terminal, according to voltages of the first power source, the second input terminal and the third and fourth nodes. The second output unit outputs a scan signal to a second output terminal, according to voltages of the second power source, the second input terminal and the third and fourth nodes. The controller is electrically coupled to the first output terminal and the second driver. | 02-12-2015 |