Abstract: In a method for driving a display, one frame may be divided into more sub frames than a number of bits of data. A time period of the one frame may be divided into a number of periods corresponding to a number of scan lines multiplied by the number of sub frames. A start position of the sub frames may be set based on a bit weight of the data so that gradations are linearly expressed. Remainders of the sub frames may be obtained by dividing the start position of the sub frames by the number of sub frames. A line number of a scan line to which a scan signal is supplied may be obtained based on the time period of the one frame, the start position of the sub frames, and the number of the sub frames.

Abstract: A data driving circuit for driving pixels of a display to display images with uniform brightness may include a gamma voltage unit that generates gray scale voltages, a digital-analog converter that selects, as a data signal, one of the gray scale voltages using first data, a decoder that generates second data using the first data, a latch for storing the first data and the second data, a current sink that receives a predetermined current from the pixel during a first partial period of a complete period for driving the pixel based on the selected gray scale voltage, a voltage controller that controls a voltage value of the data signal using the second data and a compensation voltage generated based on the predetermined current, and a switching unit that supplies the data signal to the pixel during any partial period of the complete period elapsing after the first partial period.

Abstract: A data driver capable of displaying images with a substantially uniform brightness, an organic light emitting display device using the same, and a method of driving the organic light emitting display device. The data driver includes a plurality of current sink units for controlling predetermined currents to flow through data lines, a plurality of voltage generators for resetting values of gray scale voltages using compensation voltages generated when the predetermined currents flow, a plurality of digital-to-analog converters for selecting one gray scale voltage among the gray scale voltages as a data signal in response to bit values of the data supplied from the outside, and a plurality of switching units for supplying the data signal to the data lines. The predetermined currents may be set equal to pixel currents that correspond to a maximum brightness.

Abstract: A data driving circuit for driving pixels of a light emitting display to display images with uniform brightness may include a current sink that is capable of receiving, via a data line, a predetermined current from a pixel to enable the data driving circuit to generate a compensation voltage for the pixel. The compensation voltage may compensate for variations among the pixels of the display. Variations among the pixels may result from different electron mobilities and/or threshold voltages of transistors included in the pixels. The value of the predetermined current may be equal to or higher than a value of a minimum current employable by the pixel to emit light of maximum brightness. The maximum brightness of the pixel may correspond to a brightness emitted by the pixel when a highest one of a plurality of set gray scale voltages is applied to the pixel.

Abstract: A data driving circuit capable of displaying images having uniform brightness. The present invention provides a data driving circuit of a display device having: at least one current sinking unit for controlling a predetermined current to flow in a data line; at least one voltage generating unit for resetting voltage values of enhancement voltages using a compensation voltage generated when the predetermined current flows; at least one digital-analog converter for selecting as a data signal one of the enhancement voltages to correspond to a digital value of externally supplied data; at least one boosting unit for boosting a voltage value of the data signal; and at least one switching unit for providing the data line with the boosted data signal.

Abstract: A data driving circuit for driving pixels of a light emitting display to display images with uniform brightness may include a gamma voltage unit that generates a plurality of gray scale voltages, a digital-analog converter that selects, as a data signal, one of the plurality of gray scale voltages using first data, a decoder that generates second data using the first data, a current sink, a voltage controller that controls a voltage value of the data signal using the second data and a compensation voltage generated based on the predetermined current, and a switching unit that supplies the data signal to the pixel during any partial period of the complete period elapsing after the first partial period. The current sink receives a predetermined current from the pixel during a first partial period of a complete period for driving the pixel based on the selected gray scale voltage.

Abstract: A data driving circuit for a light emitting display may include a gamma voltage generator that generates gradation voltages, a current sink that receives a predetermined current from a pixel via a data line during a first partial period of one complete period for driving the pixel, a voltage generator that generates an incrementally increasing compare voltage during the first partial period, a comparator that compares a compensation voltage generated based on the predetermined current with the compare voltage and generates a logic signal based on a result of the compare, an adjusting unit that generates compensation data based on the logic signal, and a digital-analog converter that generates a composite data using the compensation data and externally supplied data and selects, as a data signal for the pixel, one of the plurality of gradation voltages based on a bit value of the composite data.

Abstract: An organic light emitting display device capable of displaying an image of uniform brightness. A scan driver drives scan lines and light emitting control lines that are formed parallel to each other. A data driver drives data lines formed at a direction intersecting the scan lines and the light emitting control lines, and pixels are disposed to be coupled with the scan lines, the light emitting control lines, and the data lines. An auxiliary line is formed parallel to the data lines. One side of the auxiliary line is coupled with a reference power supply and another side of the auxiliary line is coupled with a current source. Connectors are disposed at crossing areas of the auxiliary line and the scan lines. A voltage transfer unit is coupled with the connectors and transfers a voltage supplied to the connectors to the data driver.

Abstract: An organic light emitting display and a method of driving the same, in which a driving frequency is lowered and at the same time a production cost is reduced. The organic light emitting display includes: a display region divided into a left part and a right part; a first data driver adapted to supply a data signal to data lines of the left part; a second data driver adapted to supply the data signal to data lines of the right part; and first and second memory groups wherein, when one of the first and second memory groups stores data to be supplied to the left and right parts therein, another one of the first and second memory groups supplies data to the first and second drivers, and wherein, when one of the first and second memory groups receives a reading signal in parallel, another one of the first and second memory groups receives a writing signal in series.