Driving method and display device

A display device, comprising a display panel and a driving circuit, wherein the driving circuit uses is configured to perform a driving method comprising:

• obtaining an area gray-scale value of a preset area of the display panel;
• obtaining an optimal common voltage value corresponding to the area gray-scale value from a common voltage look-up table corresponding to the preset area, and outputting the optimal common voltage value to a common electrode of the preset area to drive the display panel for display;
• wherein the common voltage look-up table is generated by a method comprising:
• driving the preset area for display with a preset area gray-scale value;
• shooting the preset area, and obtaining a flicker value corresponding to the preset area;
• adjusting the common voltage value a plurality of times, and recording the common voltage value when the flicker value is the minimum as the optimal common voltage value;
• adjusting the preset area gray-scale value a plurality of times, and recording a plurality of optimal common voltage values corresponding to the plurality of adjusted preset area gray-scale values;
• generating the common voltage look-up table based on the plurality of preset area gray-scale values and the corresponding optimal common voltage values;
• writing the common voltage look-up table into a memory of a timing control chip;
• and
• performing a re-power-on test, using the optimal common voltage value of the common voltage look-up table corresponding to the preset area to drive the display panel for display, re-obtaining a flicker value and determining whether the flicker value meets a preset requirement;
• in response to determining that the optimal common voltage value meets the preset requirement, deciding that the optimal common voltage value is qualified;
• otherwise in response to determining that the optimal common voltage value does not meet the preset requirement, re-testing and generating a new common voltage look-up table, and rewriting and testing the new common voltage look-up table until it is decided as qualified.

A driving method for driving a display panel according to a common voltage look-up table, the driving method comprising:

• obtaining an area gray-scale value of a preset area of the display panel;
• obtaining an optimal common voltage value corresponding to the area gray-scale value from a common voltage look-up table corresponding to the preset area, and outputting the optimal common voltage value to a common electrode of the preset area to drive the display panel for display;
• wherein the common voltage look-up table is generated by a method comprising:
• driving the preset area for display with a preset area gray-scale value;
• shooting the preset area, and obtaining a flicker value corresponding to the preset area;
• adjusting the common voltage value a plurality of times, and recording the common voltage value when the flicker value is the minimum as the optimal common voltage value;
• adjusting the preset area gray-scale value a plurality of times, and recording a plurality of optimal common voltage values corresponding to the plurality of adjusted preset area gray-scale values;
• and
• generating the common voltage look-up table based on the plurality of preset area gray-scale values and the corresponding optimal common voltage values;
• wherein the preset area comprises a center area and a peripheral area;
• wherein the operation of obtaining the area gray-scale value of the preset area of the display panel comprises:
• obtaining the area gray-scale values of the center area and the peripheral area respectively;
• wherein the operation of obtaining the optimal common voltage value corresponding to the area gray-scale value from the common voltage look-up table corresponding to the preset area and outputting the common voltage value to the common electrode of the preset area to drive the display panel for display comprises:
• obtaining the optimal common voltage values corresponding to the area gray-scale values of the center area and the peripheral area from the common voltage look-up tables corresponding to the center area and the peripheral area, respectively, outputting the optimal common voltage values to the common electrodes of the center area and the peripheral area respectively to drive the center area and the peripheral area of the display panel for display;
• wherein the peripheral area is arranged around the center area, and an area ratio of the center area to the peripheral area is 2:1 to 1:1;
• wherein the common voltage look-up table corresponding to the center area is a first common voltage look-up table, and the common voltage look-up table corresponding to the peripheral area is a second common voltage look-up table;
• wherein a set of a preset gray-scale value and an optimal common voltage value in the common voltage look-up table constitute a data group, and wherein the number of data groups in the first common voltage look-up table is greater than the number of data groups in the second common voltage look-up table.