Driving method and driving chip for organic light-emitting display panel, and display device

A driving chip for an organic light-emitting display panel, comprising:

• a target brightness acquiring device configured to acquire a target brightness;
• a rank determining device configured to determine a rank corresponding to the target brightness from a plurality of ranks, wherein each of the plurality of ranks comprises a first brightness range, the first brightness ranges of any two ranks of the plurality of ranks are different from each other and have no overlapping, the first brightness range of the rank corresponding to the target brightness comprises the target brightness, each of the plurality of ranks has a Gamma curve corresponding to a maximum brightness of the first brightness range of the rank;
• a duty ratio determining device configured to determine a duty ratio corresponding to the target brightness in the rank corresponding to the target brightness, wherein the duty ratio is an effective pulse duty ratio of a light-emitting control signal, and the maximum brightness of the first brightness range in each of the plurality of ranks corresponds to a same duty ratio;
• and
• a driving device configured to drive the organic light-emitting display panel based on the Gamma curve of the rank corresponding to the target brightness and the duty ratio corresponding to the target brightness in the rank corresponding to the target brightness.

A display device, comprising:

• an organic light-emitting display panel;
• and
• a driving chip for an organic light-emitting display panel, comprising:
• a target brightness acquiring device configured to acquire a target brightness;
• a rank determining device configured to determine a rank corresponding to the target brightness from a plurality of ranks, wherein each of the plurality of ranks comprises a first brightness range, the first brightness ranges of any two ranks of the plurality of ranks are different from each other and have no overlapping, the first brightness range of the rank corresponding to the target brightness comprises the target brightness, each of the plurality of ranks has a Gamma curve corresponding to a maximum brightness of the first brightness range of the rank;
• a duty ratio determining device configured to determine a duty ratio corresponding to the target brightness in the rank corresponding to the target brightness, wherein the duty ratio is an effective pulse duty ratio of a light-emitting control signal, and the maximum brightness of the first brightness range in each of the plurality of ranks corresponds to a same duty ratio;
• and
• a driving device configured to drive the organic light-emitting display panel based on the Gamma curve of the rank corresponding to the target brightness and the duty ratio corresponding to the target brightness in the rank corresponding to the target brightness.