Pixel compensation circuit

A pixel compensation circuit for compensating a display gray-scale voltage for a pixel, the pixel comprising an organic light emitting element and a driving transistor, the pixel compensation circuit comprising:

• a signal amplification circuit configured to collect an anode potential of the organic light emitting element and obtain a driving current flowing through the organic light emitting element based on the anode potential;
• a signal storage circuit configured to store threshold voltages of the driving transistor, each corresponding to one anode potential of the organic light emitting element, and preset gray-scale voltages, each corresponding to one driving current flowing through the organic light emitting element, determine a threshold voltage of the driving transistor corresponding to the anode potential based on the anode potential, and determine a preset gray-scale voltage corresponding to the driving current based on the driving current;
• a comparison calculation circuit configured to determine a current gray-scale voltage for the pixel based on a sum of the anode potential and the threshold voltage of the driving transistor corresponding to the anode potential, and determine a compensation voltage for the pixel based on a difference between the preset gray-scale voltage and the current gray-scale voltage;
• and
• a signal compensation circuit configured to receive the display gray-scale voltage for the pixel and the compensation voltage, and output a compensated gray-scale voltage for the pixel, as a sum of the display gray-scale voltage and the compensation voltage, to a gate of the driving transistor, so as to drive the organic light emitting element to emit light.