Organic light-emitting diode display device and method of driving the same
First Claim
1. An organic light-emitting diode (OLED) display device, comprising:
- a pixel including;
a driving thin film transistor (TFT) configured to drive an OLED element;
a first switching TFT configured to connect a data line to a gate electrode of the driving TFT by control of a first gate line;
a second switching TFT configured to connect a reference line to a source electrode of the driving TFT by control of a second gate line; and
a capacitor connected between the gate electrode of the driving TFT and the source electrode of the driving TFT; and
a data driver including;
a first amplifier configured to drive the data line with a reference voltage (Vref) or a data voltage (Vdata);
a second amplifier configured to drive the reference line with an initialization voltage; and
a third amplifier configured to sense a voltage of the reference line, and supply a reference sensing voltage to the second amplifier, wherein the voltage of the reference line is based on a threshold voltage (Vth) of the driving TFT.
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Accused Products
Abstract
An organic light-emitting diode (OLED) display device can include a pixel and a data driver. The pixel includes a driving thin film transistor (TFT) to drive an OLED element, a first switching TFT to connect a data line to a gate electrode of the driving TFT, a second switching TFT to connect a reference line to a source electrode of the driving TFT and a capacitor connected between the gate electrode and the source electrode of the driving TFT. The data driver includes a first amplifier to drive the data line with a reference voltage or a data voltage, a second amplifier to drive the reference line with an initialization voltage, and a third amplifier to sense a voltage of the reference line and supply a reference sensing voltage to the second amplifier, in which the reference line voltage is based on a threshold voltage of the driving TFT.
7 Citations
12 Claims
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1. An organic light-emitting diode (OLED) display device, comprising:
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a pixel including; a driving thin film transistor (TFT) configured to drive an OLED element; a first switching TFT configured to connect a data line to a gate electrode of the driving TFT by control of a first gate line; a second switching TFT configured to connect a reference line to a source electrode of the driving TFT by control of a second gate line; and a capacitor connected between the gate electrode of the driving TFT and the source electrode of the driving TFT; and a data driver including; a first amplifier configured to drive the data line with a reference voltage (Vref) or a data voltage (Vdata); a second amplifier configured to drive the reference line with an initialization voltage; and a third amplifier configured to sense a voltage of the reference line, and supply a reference sensing voltage to the second amplifier, wherein the voltage of the reference line is based on a threshold voltage (Vth) of the driving TFT. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An organic light-emitting diode (OLED) display device, comprising:
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a pixel circuit including; a driving thin film transistor (TFT) connected to an OLED element; a first switching TFT configured to connect a data line to a gate electrode of the driving TFT; a second switching TFT configured to connect a reference line to a source electrode of the driving TFT; and a capacitor connected between the gate electrode of the driving TFT and the source electrode of the driving TFT; and a data driver including an analog compensation circuit for compensating for a threshold voltage of the driving TFT, wherein the analog compensation circuit includes a first amplifier and a second amplifier, wherein the first amplifier is connected to an output of the second amplifier, and wherein the second amplifier is configured to sense a voltage of the reference line and supply a reference sensing voltage to the second amplifier, and the first amplifier is configured to supply a compensation voltage based on the reference sensing voltage to the reference line. - View Dependent Claims (10, 11, 12)
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Specification