Data driver, organic light emitting display device using the same, and method of driving the organic light emitting display device
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United States of America Patent
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Jan 29, 2019
Grant Date -
Feb 1, 2018
app pub date -
Oct 12, 2017
filing date -
Aug 10, 2005
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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.
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