Patent ID: 7692643

Claim:
An active matrix type display apparatus, comprising: a plurality of pixel circuits, respective pixel circuits having the same circuit topology and connected to one data line in a row, and each pixel circuit having a current driving type display element, a first field effect transistor to control a current flowing in said current driving type display element, and a switch provided between a control electrode and one main electrode of said first field effect transistor arranged in a matrix, said plurality of pixel circuits arranged in a column direction being connected to said one data line, said switches of said pixel circuits connected to said one data line are sequentially turned on for a predetermined time period, and an image data current flowing in said data line is supplied to said control electrode and said one main electrode of each of said first field effect transistors of said pixel circuits, thereby writing a current value of said image data current into each of said pixel circuits as a value of a voltage between an other main electrode and said control electrode of said first field effect transistor; and preliminary charging circuits provided on respective rows of the pixel circuits, and each of the preliminary charging circuits connected to a corresponding data line, wherein each of the preliminary charging circuits comprises a field effect transistor, a switch provided between a control electrode and one main electrode of the field effect transistor, and a capacitor provided between the control electrode and the other main electrode of the field effect transistor, each of the preliminary charging circuits is adapted to: during a vertical blanking period, be programmed to generate a predetermined current by an operation that a current flowing in the connected data line is supplied to the field effect transistor and a gate-to-source voltage of the field effect transistor is held in the capacitor, during each horizontal blanking period, apply the predetermined current to the connected data line in the same direction as the image data current, and set a voltage between the other main electrode and the control electrode of the first field effect transistor of the pixel circuit, which is connected to the connected data line and selected by a scan line, to a voltage equal to or greater than thresholds of a plurality of the first field effect transistors of the plurality of pixel circuits connected to the connected data line.