Display device and drive method for same

An active matrix-type display device comprising:

• a display unit including:
• a pixel matrix of n rows and m columns (n and m are integers of 2 or more), which is composed of n×m pieces of pixel circuits each including an electro-optical element in which brightness is controlled by a current and including a drive transistor for controlling a current to be supplied to the electro-optical element;
• scanning lines provided to correspond to respective rows of the pixel matrix;
• monitor control lines provided to correspond to the respective rows of the pixel matrix;
• and data lines provided to correspond to respective columns of the pixel matrix;
• a pixel circuit drive unit configured to drive the scanning lines, the monitor control lines and the data lines so that characteristic detection processing for detecting characteristics of characteristic detection-target circuit elements including at least either of the electro-optical element and the drive transistor is performed in a frame period, and that each electro-optical element emits light in response to target brightness;
• a correction data storage unit configured to store characteristic data, which are obtained based on results of the characteristic detection processing, as correction data for correcting video signals;
• and
• a video signal correction unit configured to correct the video signals based on the correction data stored in the correction data storage unit, and to generate data signals to be supplied to the n×m pieces of pixel circuits,
• wherein each of the pixel circuits includes:
• the electro-optical element;
• an input transistor, in which a control terminal is connected to one of the scanning lines, a first conductive terminal is connected to one of the data lines, and a second conductive terminal is connected to the control terminal of the drive transistor;
• a monitor control transistor, in which a control terminal is connected to one of the monitor control lines, a first conductive terminal is connected to the second conductive terminal of the drive transistor and to the anode of the electro-optical element, and a second conductive terminal is connected to one of the data lines;
• the drive transistor in which a first conductive terminal is given a drive power supply potential;
• and
• a first capacitor in which one end is connected to a control terminal of the drive transistor in order to hold a potential of the control terminal of the drive transistor,
• wherein, when a row in which the characteristic detection processing is performed in the frame period is defined as a monitor row, and each of rows other than the monitor row is defined as a non-monitor row, the frame period includes a characteristic detection processing period composed of:
• a detection preparation period where a preparation for detecting characteristics of the characteristic detection-target circuit elements is performed in the monitor row;
• a current measurement period where the characteristics of the characteristic detection-target circuit elements are detected by measuring currents flowing through the data lines;
• and a light emission preparation period where a preparation for allowing the electro-optical element to emit light is performed in the monitor row,
• the pixel circuit drive unit drives the scanning lines so that the input transistor becomes an ON state during the detection preparation period and the light emission preparation period, and that the input transistor becomes an OFF state during the current measurement period,
• the pixel circuit drive unit drives the monitor control lines so that the monitor control transistor becomes an OFF state during the detection preparation period and the light emission preparation period, and that the monitor control transistor becomes an ON state during the current measurement period,
• the pixel circuit drive unit gives the data lines a first predetermined potential during the detection preparation period, the first predetermined potential being determined based on the characteristics of the electro-optical element and the characteristics of the drive transistor,
• the pixel circuit drive unit gives the data lines a second predetermined potential during the current measurement period, the second predetermined potential serving for allowing a current in accordance with the characteristics of each of the characteristic detection-target circuit elements to flow through each of the data lines, and
• the pixel circuit drive unit gives the data lines a potential in accordance with a target brightness of the electro-optical element during the light emission preparation period.