Organic light emitting display and driving method thereof, including compensating to display images of desired luminance
First Claim
Patent Images
1. A organic light emitting display, comprising:
- a scan driver connected to scan lines;
a data driver connected to data lines;
pixels connected to the scan lines and the data lines, the pixels being adapted to generate light while applying an electric current from a first power source to a second power source through an organic light emitting diode;
a power source unit adapted to generate the first power source; and
a compensating unit adapted to control a voltage value of the first power source,the compensating unit including a resistor between the power source unit and the pixels, an amplifier adapted to amplify a voltage across the resistor, a reference voltage generator adapted to generate a reference voltage, a comparator adapted to compare the amplified voltage with the reference voltage, a counter adapted to generate a counter signal counting up or down a count according to a comparison result of the comparator, and a controller adapted to supply a feedback signal to the power source unit, the feedback signal being generated in accordance with the counter signal.
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Abstract
An display and a driving method thereof are capable of displaying images of desired luminance. The display includes a scan driver connected to scan lines, a data driver connected to data lines, pixels connected to the scan lines and the data lines, the pixels being adapted to generate light while supplying an electric current from a first power source to a second power source, a power source unit for generating the first power source, and a compensating unit adapted to control a voltage value of the first power source.
12 Citations
19 Claims
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1. A organic light emitting display, comprising:
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a scan driver connected to scan lines; a data driver connected to data lines; pixels connected to the scan lines and the data lines, the pixels being adapted to generate light while applying an electric current from a first power source to a second power source through an organic light emitting diode; a power source unit adapted to generate the first power source; and a compensating unit adapted to control a voltage value of the first power source, the compensating unit including a resistor between the power source unit and the pixels, an amplifier adapted to amplify a voltage across the resistor, a reference voltage generator adapted to generate a reference voltage, a comparator adapted to compare the amplified voltage with the reference voltage, a counter adapted to generate a counter signal counting up or down a count according to a comparison result of the comparator, and a controller adapted to supply a feedback signal to the power source unit, the feedback signal being generated in accordance with the counter signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for driving an organic light emitting display including pixels for generating light using an electric current from a first source to a second power source through an organic light emitting diode, the method comprising:
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(i) generating the first power source by a power source unit; (ii) amplifying a voltage across a resistor installed between the first power source and the pixels; (iii) comparing the amplified voltage with a reference voltage, and generating a counter signal according to the comparison result so that the amplified voltage becomes identical with the reference voltage; (iv) transferring the counter signal to a digital-analog converter as a compensating signal; (v) supplying the compensating signal converted into an analog digital signal by the digital-analog converter to the power source unit; and (vi) controlling a voltage of the first power source by the power source unit according to the compensating signal, wherein the reference voltage is set to be substantially the same voltage as the amplified voltage during an initial drive. - View Dependent Claims (18, 19)
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Specification