Light emitting display, display panel, and driving method thereof

A light emitting display including a plurality of data lines for transmitting data voltages corresponding to video signals, a plurality of scan lines for transmitting select signals, and a plurality of pixel circuits, each said pixel circuit coupled to a corresponding said data line to receive a corresponding said data voltage and a corresponding said scan line to receive a corresponding said select signal, each said pixel circuit comprising:

• a transistor including a first electrode, a second electrode for receiving a first power supply voltage, and a third electrode for outputting a current corresponding to a voltage between the first electrode and the second electrode;
• a light emitting element coupled to the third electrode for emitting light corresponding to the current outputted by the third electrode;
• a first capacitor coupled between the first and second electrodes of the transistor;
• a first switch for transmitting the corresponding said data voltage in response to the corresponding said select signal from the corresponding said scan line;
• and
• a voltage compensator for receiving the corresponding said data voltage transmitted by the first switch and for applying a compensated data voltage based on the corresponding said data voltage and the first power supply voltage to the first electrode of the transistor.

A display panel of a light emitting display including a plurality of data lines for transmitting data voltages corresponding to video signals, a plurality of scan lines for transmitting select signals, and a plurality of pixel circuits, each said pixel circuit coupled to a corresponding said data line to receive a corresponding said data voltage and a corresponding said scan line to receive a corresponding said select signal, each said pixel circuit comprising:

• a transistor including a first electrode, a second electrode for receiving a first power supply voltage, and a third electrode for outputting a current corresponding to a voltage between the first electrode and the second electrode;
• a light emitting element coupled to the third electrode for emitting light corresponding to the current outputted by the third electrode;
• a capacitor having a first electrode coupled to the first electrode of the transistor;
• and
• a switch coupled between a second electrode of the capacitor and the corresponding said scan line,
• wherein operating periods of the pixel circuits include:
• a first period during which the transistor is diode-connected and the corresponding said data voltage is applied to the second electrode of the capacitor;
• and
• a second period during which a second power supply voltage is applied to the second electrode of the capacitor.

A method for driving a display panel including a matrix of pixel circuits, each said pixel circuit including:

• a transistor including a first electrode, a second electrode for receiving a first power supply voltage, and a third electrode for outputting a current corresponding to a voltage between the first electrode and the second electrode;
• a light emitting element coupled to the third electrode for emitting light corresponding to the current outputted by the third electrode;
• a capacitor having a first electrode coupled to the first electrode of the transistor;
• and a switch coupled between a second electrode of the capacitor and a scan line, the method comprising:
• (a) diode-connecting the transistor;
• (b) applying a data voltage to the second electrode of the capacitor;
• and
• (c) applying a second power supply voltage to the second electrode of the capacitor.