Compensation circuit and method for controlling the same, display panel and display device

A display device, comprising a compensation circuit;

• wherein the compensation circuit is applicable for a display panel comprising a plurality of pixels, each pixel comprising a plurality of sub-pixels;
• wherein each sub-pixel comprises a first transistor, wherein a gate of the first transistor is electrically connected to a data line, a source of the first transistor is electrically connected to a voltage input end, and a drain of the first transistor is electrically connected to an organic light emitting element;
• wherein the compensation circuit comprises:
• a sensing line for receiving a current flowing from the source to the drain of the first transistor;
• a first switch having a terminal electrically connected to the sensing line;
• a current sensor electrically connected to another terminal of the first switch and configured to determine a value of the current received on the sensing line when the first transistor is turned on and the first switch is closed;
• and
• a controller electrically connected to the current sensor and the data line for adjusting a data signal input to the data line according to the value of the current.

A method for controlling a compensation circuit;

• wherein the compensation circuit is applicable for a display panel comprising a plurality of pixels, each pixel comprising a plurality of sub-pixels;
• wherein each sub-pixel comprises a first transistor, wherein a gate of the first transistor is electrically connected to a data line, a source of the first transistor is electrically connected to a voltage input end, and a drain of the first transistor is electrically connected to an organic light emitting element;
• wherein the compensation circuit comprises:
• a sensing line for receiving a current flowing from the source to the drain of the first transistor;
• a first switch having a terminal electrically connected to the sensing line;
• a current sensor electrically connected to another terminal of the first switch and configured to determine a value of the current received on the sensing line when the first transistor is turned on and the first switch is closed;
• and
• a controller electrically connected to the current sensor and the data line for adjusting a data signal input to the data line according to the value of the current;
• wherein the method comprises:
• determining a value of a current on the sensing line when the first transistor is turned on and the first switch is closed;
• and
• adjusting the data signal input to the data line according to the value of the current.