Display device, pixel correction circuit and pixel correction method

A pixel correction circuit comprising:

• a signal input circuit;
• a follower;
• and
• a reading circuit;
• wherein the signal input circuit is configured to apply a first signal and a second signal to the follower in a correction mode;
• wherein an input terminal of the follower is coupled to the signal input circuit;
• the follower is configured to receive the first signal and the second signal sequentially, output a first follow-up signal dependent on the first signal when receiving the first signal, and output a second follow-up signal dependent on the second signal when receiving the second signal;
• wherein the reading circuit is coupled to an output terminal of the follower;
• the reading circuit reads the first follow-up signal and then generates a first read signal, and reads the second follow-up signal and then generates a second read signal;
• and
• wherein the reading circuit uses the first signal, the second signal, the first read signal and the second read signal to calculate a compensation gain, thereby enabling the reading circuit to perform compensation correction based on the compensation gain,
• wherein the signal input circuit includes:
• a first signal receiving terminal configured to receive the first signal;
• a second signal receiving terminal configured to receive the second signal;
• a switching circuit;
• and
• a mode selection circuit;
• wherein the switching circuit includes a first input terminal, a second input terminal and an output terminal;
• a first path is defined between the first input terminal and the output terminal of the switching circuit;
• a second path is defined between the second input terminal and the output terminal of the switching circuit;
• the first input terminal of the switching circuit is coupled to the first signal receiving terminal;
• the second input terminal of the switching circuit is coupled to the second signal receiving terminal;
• wherein the mode selection circuit is coupled to the output terminal of the switching circuit;
• the mode selection circuit is further coupled to the input terminal of the follower;
• the mode selection circuit is configured to enable the switching circuit to be coupled with the follower in the correction mode;
• and
• wherein when the first path is switched on, the follower receives the first signal;
• and when the second path is switched on, the follower receives the second signal.

A pixel correction method comprising:

• outputting, by a follower, a first follow-up signal dependent on a first signal when the follower receives the first signal;
• reading, by a reading circuit, the first follow-up signal and then generating a first read signal;
• outputting, by the follower, a second follow-up signal dependent on a second signal when the follower receives the second signal;
• reading, by the reading circuit, the second follow-up signal and then generating a second read signal;
• and
• calculating a compensation gain according to the first signal, the second signal, the first read signal and the second read signal, thereby enabling the reading circuit to perform compensation correction based on the compensation gain,
• wherein the calculating a compensation gain according to the first signal, the second signal, the first read signal and the second read signal, includes:
• obtaining a first voltage difference of the first signal and the second signal;
• obtaining a second voltage difference of the first read signal and the second read signal;
• and
• taking a ratio of the first voltage difference to the second voltage difference as the compensation gain.