Display module driving device and method

A display module driving device, used for driving a display module, the display mode comprising a plurality of sub pixels each of which comprises an organic light emitting diode, wherein the display module driving device comprises:

• a display driving module, driving each of the organic light emitting diodes to emit light;
• a brightness detecting module, having a plurality of light sensors, each of the light sensors detecting a brightness of a corresponding organic light emitting diode and outputting a corresponding actual brightness value;
• a gray scale brightness conversion module, acquiring a gray scale value of each of the sub pixels in a present display frame and converting the gray scale value into a corresponding target brightness value;
• a comparing module, receiving and comparing the target brightness value and the corresponding actual brightness value of each of the sub pixels;
• and
• a controlling module, controlling the display driving module to drive the organic light emitting diodes to maintain the target brightness value as the actual brightness value is equal to the target brightness value,
• wherein the display driving module comprises a plurality of driving units that respectively drive the plurality of sub pixels by generating and supplying a driving voltage to the plurality of sub pixels, each of the driving units having a driving transistor that is controlled by the driving voltage to drive the organic light emitting diode of a respective one of the plurality of sub pixels;
• and
• wherein each of the driving units further comprises a switching transistor that is controlled by the controlling module to selectively cut off the supply of the driving voltage to the driving transistor.