Active matrix type display device, active matrix type organic electroluminescent display device, and methods of driving such display devices

An active matrix type display device including current-writing type pixel circuits arranged in a matrix form for allowing current to pass through the pixel circuits via a data line in accord with luminance to write luminance information thereinto, each pixel circuit having an electro-optical element whose luminance varies with the current passing therethrough, said pixel circuit comprising:

• a first scanning switch for selectively passing the current provided from said data line;
• a conversion part for converting the current provided through said first scanning switch into voltage;
• a second scanning switch for selectively passing the voltage converted by said conversion part;
• a hold part for holding the voltage supplied thereto through said second scanning switch;
• and
• a drive part for converting the voltage held in said hold part into current and passing the converted current through said electro-optical element, wherein said first scanning switch is shared between at least two separate pixels in a row direction.

An active matrix type organic electroluminescent display device including current-writing type pixel circuits arranged in a matrix form for allowing current to pass through the pixel circuits via a data line in accord with luminance to write luminance information thereinto, each pixel circuit utilizing as a display element organic electroluminescent element having a first electrode, a second electrode and layers of electroluminescent organic material, the layers being placed between the electrodes and including a light-emitting layer, said pixel circuit comprising:

• a conversion part for converting the current provided from said data line into voltage;
• a hold part for holding the voltage converted by said conversion part;
• and
• a drive part for converting the voltage held in said hold part into current and passing the converted current through the organic electroluminescent element, wherein said conversion part is shared between at least two separate pixels in a row direction.

An active matrix type organic electroluminescent display device including current-writing type pixel circuits arranged in a matrix form for allowing current to pass through the pixel circuits via a data line in accord with luminance to write luminance information thereinto, each pixel circuit utilizing as a display element organic electroluminescent element having a first electrode, a second electrode and layers of electroluminescent organic material, said layers being placed between the electrodes and including a light-emitting layer, said pixel circuit comprising:

• a first scanning switch for selectively passing the current provided from said data line;
• a conversion part for converting the current provided through said first scanning switch into voltage;
• a second scanning switch for selectively passing the voltage converted by said conversion part;
• a hold part for holding the voltage supplied thereto through said second scanning switch;
• and
• a drive part for converting the voltage held in said hold part into current and passing the converted current through said electro-optical element, wherein said first scanning switch is shared between at least two separate pixels in a row direction.