Voltage drop compensation method and device thereof, display device

A voltage drop compensation device, configured to perform compensation on a display panel, the display panel comprising a plurality of rows of pixels, and the plurality of rows of pixels comprising at least one pixel row to be compensated,

• wherein the voltage drop compensation device comprises:
• a current sensor, configured to detect a source-end input current of the display panel;
• a voltage drop determining module connected to the current sensor, comprising a voltage drop model constructed based on an impedance distribution of the plurality of rows of pixels, and configured to determine an input value of the voltage drop model based on the source-end input current, and determine at least one voltage drop corresponding to the at least one pixel row to be compensated according to the input value of the voltage drop model;
• and
• a grayscale compensation module connected to the voltage drop determining module, configured to determine, according to the at least one voltage drop, at least one compensation grayscale which is in one-to-one correspondence with the at least one pixel row to be compensated respectively, and to perform grayscale compensation on the at least one pixel row to be compensated based on the at least one compensation grayscale.

A display device, comprising a display panel and a voltage drop compensation device,

• wherein the voltage drop compensation device is configured to perform compensation on the display panel, the display panel comprises a plurality of rows of pixels, and the plurality of rows of pixels comprises at least one pixel row to be compensated,
• the voltage drop compensation device comprises:
• a current sensor, configured to detect a source-end input current of the display panel;
• a voltage drop determining module connected to the current sensor, comprising a voltage drop model constructed based on an impedance distribution of the plurality of rows of pixels, and configured to determine an input value of the voltage drop model based on the source-end input current, and determine at least one voltage drop corresponding to the at least one pixel row to be compensated according to the input value of the voltage drop model;
• and
• a grayscale compensation module connected to the voltage drop determining module, configured to determine, according to the at least one voltage drop, at least one compensation grayscale which is in one-to-one correspondence with the at least one pixel row to be compensated respectively, and perform grayscale compensation on the at least one pixel row to be compensated based on the at least one compensation grayscale.