Pixel, organic light emitting display using the same, and associated methods
AssigneeSamsung Mobile Display Co., Ltd.
InventorYang-wan Kim
Life of this patent
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Abstract
An organic light emitting display includes a scan driver configured to sequentially supply a scan signal to scan lines and sequentially supply a light emitting control signal to light emitting control lines, a data driver configured to supply a data signal to data lines, and pixels arranged coupled to the scan lines, the data lines and the light emitting control lines. Each of the pixels includes an organic light emitting diode, a second transistor, a storage capacitor coupled between an i−1th light emitting control line and a gate electrode of the second transistor, a first transistor coupled between an ith scan line, a data line and a first electrode of the second transistor, and a third transistor coupled between the gate electrode and a second electrode of the second transistor.
Claims20
An organic light emitting display, comprising:
- a scan driver configured to sequentially supply a scan signal to scan lines and sequentially supply a light emitting control signal to light emitting control lines;
- a data driver configured to supply a data signal to data lines;
- and
- pixels arranged coupled to the scan lines, the data lines and the light emitting control lines, wherein:
- each of the pixels includes:
- an organic light emitting diode,
- a second transistor controlling an amount of electric current supplied to the organic light emitting diode,
- a storage capacitor coupled between an i−1th light emitting control line and a gate electrode of the second transistor,
- a first transistor coupled between an ith scan line, a data line and a first electrode of the second transistor, the first transistor being turned on when a scan signal is supplied to the ith scan line,
- a third transistor coupled between the gate electrode and a second electrode of the second transistor, the third transistor being turned on when the scan signal is supplied to the ith scan line, and
- a boosting capacitor coupled between the gate electrode of the second transistor and the ith scan line,
- the light emitting control signal has a base voltage and a positive pulse voltage,
- the scan signal has a base voltage and a negative pulse voltage, and
- the positive pulse voltage of the light emitting control signal is greater than the base voltage of the scan signal.
A pixel, comprising:
- an organic light emitting diode;
- a second transistor controlling an amount of electric current supplied to the organic light emitting diode;
- a storage capacitor coupled between an i−1th light emitting control line and a gate electrode of the second transistor, a light emitting control signal being supplied to the i−1th light emitting control line;
- a first transistor coupled between an ith scan line, a data line and a first electrode of the second transistor, the first transistor being turned on when a scan signal is supplied to the ith scan line;
- a third transistor coupled between the gate electrode and a second electrode of the second transistor, the third transistor being turned on when the scan signal is supplied to the ith scan line;
- and
- a boosting capacitor coupled between the gate electrode of the second transistor and the ith scan line, wherein:
- the light emitting control signal has a base voltage and a positive pulse voltage,
- the scan signal has a base voltage and a negative pulse voltage, and
- the positive pulse voltage of the light emitting control signal is greater than the base voltage of the scan signal.
A method for driving an organic light emitting display including pixels having a storage capacitor, a first electrode of the storage capacitor being coupled to a gate electrode of a drive transistor, and a second electrode of the storage capacitor being coupled to an i−1th light emitting control line, the method comprising:
- supplying a light emitting control signal to the i−1th light emitting control line to increase a voltage of the gate electrode of the drive transistor via the storage capacitor;
- suspending the supply of the light emitting control signal to the i−1th light emitting control line and simultaneously supplying a scan signal to an ith scan line to charge a voltage corresponding to a data signal and a threshold voltage of the drive transistor in the storage capacitor;
- and
- supplying an electric current corresponding to the voltage charged in the storage capacitor to an organic light emitting diode.
Dependencies are inferred from the claim text.