Display device and driving method for driving display panel

A display device, comprising:

• a display panel, comprising:
• a plurality of pixel groups, wherein each of the pixel groups comprises:
• a plurality of sub-pixel circuits configured to each receive a pulse amplitude modulation data and control a luminous intensity of the sub-pixel circuits based on the pulse amplitude modulation data;
• and
• a pulse width modulation circuit configured to receive a pulse width modulation data and control a luminous time of the sub-pixel circuits based on the pulse width modulation data;
• and
• a control system configured to perform steps comprising:
• receiving an image information of the display panel, wherein the image information comprises a current grayscale value of each of the sub-pixel circuits;
• establishing the pulse width modulation data for each of the sub-pixel circuits based on the current grayscale value by a first lookup table, wherein the first lookup table comprises a plurality of input grayscale intervals and a plurality of output pulse width modulation data, each of the input grayscale intervals corresponding to one of the output pulse width modulation data, wherein the pulse width modulation data for each of the sub-pixel circuits is established based on the output pulse width modulation data corresponding to one of the input grayscale intervals within which the current grayscale value of said sub-pixel circuit falls;
• adding a plurality of grayscale values corresponding to the pulse width modulation data based on the first lookup table to the image information;
• converting the current grayscale value to a target grayscale value for each of the sub-pixel circuits by a second lookup table, wherein the target grayscale value corresponds to the pulse amplitude modulation data, and the second lookup table comprises the plurality of input grayscale intervals and a plurality of output grayscale intervals, each of the input grayscale intervals corresponding to one of the output grayscale intervals, wherein the target grayscale value for each of the sub-pixel circuits is converted based on the output grayscale interval corresponding to one of the input grayscale intervals within which the current grayscale value of said sub-pixel circuits falls;
• and
• controlling the display panel to display the image information having the pulse width modulation data and the target grayscale values.