SCANNING DISPLAY

摘要

This invention relates to a display device (5) comprising first and a second sub-pixel (5a, 5b), said first sub-pixel (5a) emitting light of a first wavelength (lambd1) and said second sub-pixel (5b) emitting light of a second wavelength (lambd2), said first sub-pixel (5a) comprising a first organic electroluminescent layer (1a), such as a polymer or a small- compound molecule layer, which is sandwiched between a front and a back electrode (2a, 3a), with a first state in which an emission driving signal (Val) is applied across said first layer (1a) for generating an emission state in which light of said first wavelength (lambd1) is emitted, and with a second state in which a sensing driving signal (Vas) is applied across said first layer (1a), whereby light of said second wavelength (lambd2) incident on said first sub-pixel (5a) can be detected. Preferably, said first electrodes (2a, 3a) are held at essentially the same potential.