Display device and driving method thereof

A display device, comprising:

• a light emitting element disposed in each of a plurality of pixels which are arranged in a plurality of rows and emitting light by applying a voltage between electrodes;
• a first power source line applied with a first reference potential which is supplied to one electrode of the light emitting element;
• a second power source line applied with a second reference potential which allows the light emitting element to emit light;
• a driving transistor disposed in each of the pixels and controlling an amount of current between a first current terminal which is connected to the other electrode of the light emitting element of the pixel and a second current terminal which is connected to the second power source line according to a control voltage signal;
• at least one first switching element switching connection and disconnection between the second power source line and the second current terminal of a plurality of the driving transistors which are arranged in each of pixel rows;
• at least one second switching element switching the presence or absence of application of a reset potential from a reset power source to the second current terminal of a plurality of the driving transistors which are arranged in each of the pixel rows;
• and
• a control unit executing a power source ON sequence,
• wherein:
• the driving transistor is an n-channel type transistor,
• the second reference potential is higher than the first reference potential,
• the reset potential has a potential difference which is less than a light emission starting voltage of the light emitting element to the first reference potential, and
• the power source ON sequence controls the first switching element so as to block between the driving transistor and the second power source line, and controls the second switching element and the driving transistor so as to set a preset state in which the other electrode of the light emitting element is connected to the reset power source, before starting the application of each of the reference potentials to the first power source line and the second power source line, in each of the pixel rows, starts the application of each of the reference potentials to the first power source line and the second power source line in the preset state, and then sequentially controls the second switching element for each of the pixel rows in synchronization with a raster scan so as to stop the supply of the reset potential to the other electrode of the light emitting element, and performs an operation of allowing the light emitting element of the pixel row to emit light.

A driving method of a display device which includes a light emitting element emitting light by applying a voltage between electrodes, a first power source line applied with a first reference potential which is supplied to one electrode of the light emitting element, a second power source line applied with a second reference potential which allows the light emitting element to emit light, a driving transistor controlling an amount of current between a first current terminal which is connected to the other electrode of the light emitting element and a second current terminal which is connected to the second power source line according to a control voltage signal, a first switching element switching connection and disconnection between the second power source line and the second current terminal, and a second switching element switching the presence or absence of application of a reset potential to the second current terminal from a reset power source, wherein:

• the driving transistor is an n-channel type transistor;
• the second reference potential is higher than the first reference potential;
• and
• the reset potential has a potential difference which is less than a light emission starting voltage of the light emitting element to the first reference potential,
• the method comprising:
• controlling the first switching element so as to block between the driving transistor and the second power source line, and controlling the second switching element and the driving transistor so as to set a preset state in which the other electrode of the light emitting element is connected to the reset power source, before starting the application of each of the reference potentials to the first power source line and the second power source line;
• and
• starting the application of each of the reference potentials to the first power source line and the second power source line in the preset state, and setting a ready state in which a normal operation of allowing the light emitting element to emit light is able to be performed.