Patent ID: 8174466
Filing Date: 2012-05-08
Classification: G09G

Abstract:
1. A display device comprising: a pixel array unit including pixel circuits arranged in a form of a matrix, said pixel circuits each including a drive transistor for generating a driving current, an electrooptic element connected to an output terminal of said drive transistor, a storage capacitor for retaining information corresponding to a signal potential of a video signal, a sampling transistor for writing the information corresponding to said signal potential to said storage capacitor, and a light emission controlling transistor for adjusting an emission period of said electrooptic element, said light emission controlling transistor being disposed between a power supply terminal of said drive transistor and a power supply line, said drive transistor generating the driving current based on the information retained in said storage capacitor and sending the driving current through said electrooptic element, whereby said electrooptic element emits light; and a control unit including a writing scanning unit for outputting, to said sampling transistor, a writing scanning pulse for performing line-sequential scanning of said pixel circuits by sequentially controlling said sampling transistor and writing information corresponding to a signal potential of a video signal to each of storage capacitors in one row, and a horizontal driving unit for supplying a video signal for one row to a video signal line according to a signal potential writing operation of said sampling transistor; wherein said control unit effects control to supply a control input terminal of said drive transistor with a fixed potential for a threshold value correcting operation for retaining a voltage corresponding to a threshold voltage of said drive transistor in said storage capacitor, and when setting a voltage across said storage capacitor to the threshold voltage of said drive transistor by repeating said threshold value correcting operation a plurality of times on a time division basis per said signal potential writing operation, said control unit effects control to perform each said threshold value correcting operation by changing said light emission controlling transistor and said sampling transistor to a conducting state in such a manner as to be interlocked with each other in periods in which said fixed potential is supplied during a period of a plurality of said threshold value correcting operations.