Light-emitting device, display device, and method for controlling driving of the light-emitting device

A display device comprising:

• a power supply line;
• a plurality of data lines;
• a plurality of pixels having a light-emitting element connected to any of the plurality of data lines, with one end electrically connected to the power supply line and at the end set at a prescribed potential, and a first transistor connecting each of the data lines and one end of the light-emitting element;
• a current supplying circuit that outputs a verification current of a preset value;
• and
• a data driver unit having voltage measuring circuits that acquire a voltage of one end of a light-emitting element when a verification current flows from one end of the light-emitting element to the other end from the current supplying circuit via the power supply line via a current path of each of the data lines and the first transistor of at least one pixel of the plurality of pixels as a verification voltage, a correction circuit that corrects drive data according to externally supplied image data based on the verification voltages acquired by the voltage measuring circuits, and a drive signal supplying circuit that generates a drive signal based on the corrected drive data.

A method for controlling driving of a light-emitting device for driving a light-emitting device having light-emitting elements,

• the light-emitting device having at least one pixel comprising a power supply line, at least one data line, a light-emitting element with one end electrically connected to the power supply line and another end set to a prescribed potential, and a first transistor connecting the data line and one end of the light-emitting element, and a current supplying circuit that outputs a verification current having a preset value, comprising the steps of:
• having the verification current flow from the current supplying circuit from one end of the light-emitting element to the other end of the light-emitting element via the power supply line;
• and
• acquiring a voltage of the one end of the light-emitting element when the verification current flows from the one end of the light-emitting element to the other end of the light-emitting element via a current path of the data line and the first transistor.

A light-emitting device having pixels equipped with light-emitting elements, comprising:

• a light-emitting region with the plurality of pixels arranged in the vicinity of intersection points of the plurality of select lines and data lines arranged in a row direction and a column direction;
• and
• a data driver unit that generates a drive signal according to externally supplied image data and supplies the drive signal to each of the pixels via the data lines,
• wherein each pixel comprises a current control transistor with one end of a current path connected to the power supply line and the other end of the current path connected to one end of the light-emitting element, that controls the flow of current in the light-emitting element, and a select control transistor with one end of a current path connected to the data line and the other end of the current path connected to a connection point of the other end of the current path of the current control transistor and the light-emitting element, and with a control terminal connected to the select line, and
• the data driver unit comprises a plurality of current supplying circuits that supply individual prescribed verification currents to each of the plurality of data lines, and a plurality of voltage measuring circuits that measure the voltages across the terminals of each of the light-emitting elements when the verification currents flow from each of the current supplying circuits via the current path of the select control transistors of each of the pixels at each of the light-emitting elements as verification voltages via the select control transistors.

A method for controlling driving of a light-emitting device having pixels equipped with light-emitting elements,

• wherein a plurality of the pixels of the light-emitting device are arranged in the vicinity of each intersection point of a plurality of select lines and data lines arranged in a row direction and a column direction at a light-emitting region, the pixels comprising a current control transistor with one end of a current path connected to the power supply line and the other end of the current path connected to the one end of the light-emitting element, that controls the flow of current in the light-emitting element, and a select control transistor with one end of a current path connected to the data line and the other end of the current path connected to a connection point of the other end of the current path of the current control transistor and the light-emitting element, and with a control terminal connected to the select line, said method comprising the steps of:
• supplying a prescribed verification current to each of the plurality of data lines, and causing the verification current to flow at each of the light-emitting elements via the current path of the select control transistors of each of the pixels of the rows put into a selected state;
• measuring the voltages across the terminals of each of the light-emitting elements as the verification voltages via the select control transistor;
• and
• correcting the drive data according to externally supplied image data based on the measured verification voltages.