Patent ID: 6191764
Filing Date: 2001-02-20
Classification: G09G,H01L

Abstract:
A method of driving a display device comprising:a forward bias voltage supply step of applying a forward bias voltage between a first display electrode and second display electrodes of an electroluminescent display panel in a gradation period having a first subfield period and a second subfield period coming after said first subfield period, said electroluminescent display panel including said first display electrode, a phototransistor provided on said first display electrode, showing a conductivity according to incidence of light emitted from said address electroluminescent layer and having a non-linear light vs. conductivity characteristics, a display electroluminescent layer, provided on said phototransistor, for emitting light as carriers are injected inside, and said second display electrodes provided on said display electroluminescent layer; anda luminescent gradation control step of selectively applying a voltage between first address electrodes and second address electrodes of an electroluminescent address panel in either said first subfield period or said second subfield period in said gradation period, said electroluminescent address panel including an address electroluminescent layer for emitting light in accordance with injected carriers, said first address electrodes provided on one side of said address electroluminescent layer and said second address electrodes provided on the other side of said address electroluminescent layer.