Organic light emitting display and driving method thereof
First Claim
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1. An organic light emitting display, comprising:
- a plurality of pixels disposed near intersections of data lines, scan lines, and emission control lines;
a scan driver configured to supply a scan signal to the scan lines and to supply an emission control signal to the emission control lines;
a control line driver configured to supply a control signal to control lines;
a data driver configured to generate data signals for the data lines;
a sensing unit configured to sense degradation information of an organic light emitting diode and a and threshold voltage and/or mobility information of a drive transistor included in each of the pixels;
a switch unit configured to connect one of the sensing unit and the data driver to the data lines;
a control block configured to store the sensed degradation information and the sensed threshold voltage and/or mobility information; and
a timing controller configured to generate second data based on first data from another circuit, the sensed degradation information, and the sensed threshold voltage and/or mobility information.
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Abstract
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.
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Citations
31 Claims
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1. An organic light emitting display, comprising:
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a plurality of pixels disposed near intersections of data lines, scan lines, and emission control lines; a scan driver configured to supply a scan signal to the scan lines and to supply an emission control signal to the emission control lines; a control line driver configured to supply a control signal to control lines; a data driver configured to generate data signals for the data lines; a sensing unit configured to sense degradation information of an organic light emitting diode and a and threshold voltage and/or mobility information of a drive transistor included in each of the pixels; a switch unit configured to connect one of the sensing unit and the data driver to the data lines; a control block configured to store the sensed degradation information and the sensed threshold voltage and/or mobility information; and a timing controller configured to generate second data based on first data from another circuit, the sensed degradation information, and the sensed threshold voltage and/or mobility information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of driving an organic light emitting display, the method comprising:
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generating a first voltage while sinking a first electric current through a drive transistor in a selected one of a plurality of pixels; converting the first voltage into a first digital value; storing the first digital value in a memory; generating a second voltage while supplying a second electric current to an organic light emitting diode in the selected pixel; converting the second voltage into a second digital value; storing the second digital value in the memory; and generating second data based on first data received from another circuit, the first digital value and the second digital value, wherein the second data has more bits than the first data value. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification