Driving method and driving device of a display panel, and display device

A driving device of driving a display panel, wherein the display panel comprises a display region, the display region comprises at least one sub-display region, and each of the at least one sub-display region comprises at least one pixel unit;

• each of the at least one pixel unit comprises a plurality of sub-pixels having different light emitting colors;
• each of the plurality of sub-pixels comprises an organic light emitting element;
• the plurality of sub-pixels of the each of the at least one pixel unit comprises at least one first sub-pixel and at least one second sub-pixel;
• the at least one second sub-pixel comprises a sub-pixel having at least one emitting color different from an emitting color of the at least one first sub-pixel;
• and a working voltage of the at least one first sub-pixel is less than a working voltage of the at least one second sub-pixel;
• and the driving device of the display panel comprises:
• a gray scale acquisition device, configured to acquire gray scale data of a frame of display image, wherein the gray scale data comprises gray scale values in one-to-one correspondence with the plurality of sub-pixels;
• a sub-display region determination device, configured to, according to the gray scale data, determine, a sub-display region in which all gray scale values of first sub-pixels are all 0 and all gray scale values of second sub-pixels are all less than a first preset gray scale value as a first sub-display region, and determine a sub-display region in which not all of the gray scale values of the first sub-pixels are 0 and not all of the gray scale values of the second sub-pixels are less than the first preset gray scale value as a second sub-display region;
• and
• a reset voltage providing device, configured to, in a reset stage, provide a first reset signal to an anode of an organic light emitting element of a sub-pixel of the first sub-display region and a second reset signal to an anode of an organic light emitting element of a sub-pixel of the second sub-display region;
• wherein a voltage of the first reset signal is less than a voltage of the second reset signal.

A display device, comprising a display panel and a driver chip, wherein

• the display panel comprises a display region, the display region comprises at least one sub-display region, and each of the at least one sub-display region comprises at least one pixel unit;
• each of the at least one pixel unit comprises a plurality of sub-pixels having different light emitting colors;
• each of the plurality of sub-pixels comprises an organic light emitting element;
• the plurality of sub-pixels of the each of the at least one pixel unit comprises at least one first sub-pixel and at least one second sub-pixel;
• the at least one second sub-pixel comprises a sub-pixel having at least one emitting color different from an emitting color of the at least one first sub-pixel;
• and a working voltage of the at least one first sub-pixel is less than a working voltage of each of the at least one second sub-pixel;
• and
• the driver chip is configured to execute a driving method of the display panel, wherein the driving method of the display panel comprises:
• acquiring gray scale data of a pre-display image, wherein the gray scale data comprises gray scale values in one-to-one correspondence with the plurality of sub-pixels;
• according to the gray scale data, determining a sub-display region in which all gray scale values of first sub-pixels are 0 and all gray scale values of second sub-pixels are less than a first preset gray scale value as a first sub-display region, and determining a sub-display region in which not all of the gray scale values of the first sub-pixels are 0 and not all of the gray scale values of the second sub-pixels are less than the first preset gray scale value as a second sub-display region;
• and
• in a reset stage, providing a first reset signal to an anode of an organic light emitting element of a sub-pixel of the first sub-display region and a second reset signal to an anode of an organic light emitting element of a sub-pixel of the second sub-display region;
• wherein a voltage of the first reset signal is less than a voltage of the second reset signal.