Patent ID: 7973782

Claim:
A display apparatus comprising: an available pixel section having a plurality of available pixel circuits arranged to form a matrix as available pixel circuits each including a switching device through which pixel video data is written into said available pixel circuits; a plurality of scan lines each provided for an individual one of rows of said available pixel circuits arranged on said available pixel section to form said matrix and each used for controlling conduction states of said switching device each employed in one of said available pixel circuits provided on said individual row; a plurality of capacitor lines each provided for any individual one of said rows and each connected to said available pixel circuits provided on said individual row; a plurality of signal lines each provided for any individual one of columns of said available pixel circuits arranged on said available pixel section to form said matrix and each used for propagating said pixel video data to said available pixel circuits provided on said individual column; a driving circuit configured to selectively drive said scan lines and said capacitor lines; and a monitor circuit capable of correcting the center value of a common voltage signal with the level changing at time intervals determined in advance by detecting the average of an electric potential of a monitor pixel circuit created separately from said available pixel section as a monitor pixel circuit for a positive polarity and an electric potential of a monitor pixel circuit also created separately from said available pixel section as a monitor pixel circuit for a negative polarity, wherein each of said available pixel circuits laid out on said available pixel section includes a display element having a first pixel electrode as well as a second pixel electrode and a storage capacitor having a first electrode as well as a second electrode, in each of said available pixel circuits, said first pixel electrode of said display element and said first electrode of said storage capacitor are connected to one terminal of said switching device, in each of said available pixel circuits provided on any individual one of said rows, said second electrode of said storage capacitor is connected to a capacitor line provided for said individual row, and said common voltage signal with the level changing at time intervals determined in advance is supplied to said second pixel electrode of each of said display element through a common-voltage signal line common to all said available pixel circuits.