Semiconductor device and driving method thereof

A semiconductor device comprising:

• a plurality of pixels;
• a driver circuit;
• a detection circuit;
• and
• a compensation circuit,
• wherein each of the plurality of pixels comprises a first sub-pixel and a second sub-pixel,
• wherein each of the first sub-pixel and the second sub-pixel comprises a light-emitting element, a first transistor configured to control a supply of a current to the light-emitting element, and a second transistor configured to control an input of a video signal to a gate of the first transistor,
• wherein an area of the first sub-pixel is different from an area of the second sub-pixel,
• wherein one of a source and a drain of the first transistor of the first sub-pixel is electrically connected to a first electrode of the light-emitting element of the first sub-pixel,
• wherein one of a source and a drain of the first transistor of the second sub-pixel is electrically connected to a first electrode of the light-emitting element of the second sub-pixel,
• wherein the other of the source and the drain of the first transistor of the first sub-pixel and the other of the source and the drain of the first transistor of the second sub-pixel are electrically connected to a power supply line,
• wherein a gate of the second transistor of the first sub-pixel and a gate of the second transistor of the second sub-pixel are electrically connected to a gate signal line,
• wherein the detection circuit detects a value of a current to the light-emitting element included in a point defective sub-pixel,
• wherein the compensation circuit generates a compensation signal based on a result obtained by the detection circuit,
• wherein the driver circuit is configured to drive a pixel having the point defective sub-pixel such that the pixel having the point defective sub-pixel is compensated by increasing an amount of the current to the light-emitting element of the second sub-pixel when the first sub-pixel is the point defective sub-pixel,
• wherein the detection circuit comprises a resistor, a switching element, a noise-reduction circuit and an analog-digital converter circuit,
• wherein a first terminal of the resistor is electrically connected to a first terminal of the switching element,
• wherein a second terminal of the resistor is electrically connected to a second terminal of the switching element,
• wherein the second terminal of the resistor is electrically connected to a second electrode of the light-emitting element of the first sub-pixel, a second electrode of the light-emitting element of the second sub-pixel and an input terminal of the noise-reduction circuit, and
• wherein an output terminal of the noise-reduction circuit is electrically connected to the input terminal of the analog-digital converter circuit.