Organic light emitting display and method of driving the same
First Claim
1. An organic light emitting display comprising:
- pixels at crossing regions of data lines, scan lines, feedback lines, control lines, and emission control lines, each of the pixels comprising an organic light emitting diode;
a scan driver for driving the scan lines and the emission control lines;
a control line driver for driving the control lines;
a sensing unit for supplying an electric current to the feedback lines during a sensing period to extract degradation information of the organic light emitting diode, and for outputting a first digital value and a second digital value corresponding to the extracted degradation information of the organic light emitting diode;
a data driver for supplying voltages corresponding to the first digital value and the second digital value to the pixels during the sensing period, and for generating data signals corresponding to second data during a normal driving period;
a first analog-digital converter for receiving and converting the voltage corresponding to the first digital value to a fourth digital value, and for receiving and converting the voltage corresponding to the second digital value to a fifth digital value; and
a timing controller for storing the fourth digital value and the fifth digital value, and for changing externally supplied first data in accordance with the fourth digital value and the fifth digital value to generate the second data.
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Reexamination
Accused Products
Abstract
An organic light emitting display includes: a sensing unit for extracting degradation information of an organic light emitting diode included in each of the pixels, and for transferring a first digital value and a second digital value corresponding to the extracted degradation information to a data driver; the data driver for generating data signals corresponding to second data supplied from a timing controller during a normal driving period; a first analog-digital converter for converting the voltage corresponding to the first digital value to a fourth digital value, and for converting the voltage corresponding to the second digital value to a fifth digital value; and the timing controller for storing the fourth digital value and the fifth digital value, and for changing first data supplied from an exterior in accordance with the fourth digital value and the fifth digital value to generate the second data.
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Citations
26 Claims
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1. An organic light emitting display comprising:
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pixels at crossing regions of data lines, scan lines, feedback lines, control lines, and emission control lines, each of the pixels comprising an organic light emitting diode; a scan driver for driving the scan lines and the emission control lines; a control line driver for driving the control lines; a sensing unit for supplying an electric current to the feedback lines during a sensing period to extract degradation information of the organic light emitting diode, and for outputting a first digital value and a second digital value corresponding to the extracted degradation information of the organic light emitting diode; a data driver for supplying voltages corresponding to the first digital value and the second digital value to the pixels during the sensing period, and for generating data signals corresponding to second data during a normal driving period; a first analog-digital converter for receiving and converting the voltage corresponding to the first digital value to a fourth digital value, and for receiving and converting the voltage corresponding to the second digital value to a fifth digital value; and a timing controller for storing the fourth digital value and the fifth digital value, and for changing externally supplied first data in accordance with the fourth digital value and the fifth digital value to generate the second data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of driving an organic light emitting display, comprising:
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supplying an electric current from a current source to an organic light emitting diode of a pixel; converting a voltage applied to the organic light emitting diode to a third digital value corresponding to the electric current and applying the third digital value to a look-up table; sequentially converting a first digital value and a second digital value corresponding to the third digital value from the look-up table to analog voltages, and transferring the analog voltages to the pixel; converting a voltage applied to a gate electrode of a drive transistor of the pixel to a fourth digital value corresponding to the first digital value, and converting a voltage applied to the gate electrode of the driver transistor to a fifth digital value corresponding to the second digital value, and storing the fourth and fifth digital values; and extracting the fourth and fifth digital values from the memory when first data to be supplied to the pixel is inputted, and generating second data to compensate for degradation of the organic light emitting diode, and a mobility and a threshold voltage of the drive transistor. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification