Grayscale compensation method, apparatus and system, display driving method, apparatus and system, and chip and medium

A displaying device, wherein the displaying device comprises a display panel, and the display panel comprises a plurality of sub-pixels;

• the displaying device stores compensation coefficients and correction coefficients corresponding to the plurality of sub-pixels;
• the compensation coefficients are for characterizing compensation modes and compensation magnitudes of brightness compensations to the sub-pixels, wherein the compensation modes include a mode of increasing a brightness and a mode of reducing a brightness;
• the correction coefficients are determined based on the compensation coefficients and to-be-displayed grayscale values, unequal instances of the to-be-displayed grayscale values correspond to unequal instances of the correction coefficients, and the correction coefficients are for correcting the compensation magnitudes;
• and
• if the displaying device is operating in a preset grayscale range, after the to-be-displayed grayscale values of the plurality of sub-pixels have been corrected by using the compensation coefficients and the correction coefficients, no black-block region whose grayscale is 0 exists, and with a same one instance of the to-be-displayed grayscale values, displaying brightnesses of the plurality of sub-pixels approach a displaying brightness corresponding to the to-be-displayed grayscale value,
• wherein based on the compensation coefficients corresponding to the plurality of sub-pixels, delimiting the display panel into a first displaying region block and a second displaying region block, wherein the compensation coefficients in the first displaying region block are greater than 0, and the compensation coefficients in the second displaying region block are less than 0;
• wherein the correction coefficients corresponding to the sub-pixels within the first displaying region block are the preset value for maintaining the compensation magnitudes;
• and
• the correction coefficients corresponding to the sub-pixels within the second displaying region block are the correction coefficients that are determined based on the compensation coefficients and the to-be-displayed grayscale values by using the target condition as the constraint.