Patent ID: 7499006

Claim:
A display device which displays image information, the display device comprising: a display panel which comprises: (i) a plurality of display pixels arranged in a matrix form, each of the display pixels including an optical element and a pixel driver circuit which controls operation of the optical element, (ii) a plurality of selection lines to which selection signals are selectively applied to select the display pixels one line at a time, and (iii) a plurality of data lines to which signal currents having current values corresponding to display signals are supplied; wherein each said pixel driver circuit is connected to the optical element controlled by the pixel drive circuit, and each said pixel drive circuit comprises: a first current path having a first end connected to a first end of the optical element and a second end connected to a drive power supply; a second current path which is formed by a section of one of the data lines; a write-in control circuit which flows a write-in current, which has a current value corresponding to the signal current supplied to the second current path, toward a second end side of the first current path from a first end side of the first current path via the second current path; a charge storage circuit which stores an electric charge accompanying the write-in current which flows in the first current path; and a drive control circuit which supplies a drive current, which is based on the electric charge stored in the charge storage circuit, to the optical element via the first current path to drive the optical element; wherein respective second ends of each of the optical elements are connected to a constant voltage regulated power source having a predetermined electric potential; and wherein an electric potential of each of the optical elements is in a forward-bias condition when an electric potential at the first end of the optical element is lower than the electric potential of the constant voltage regulated power source, and the electric potential of each of the optical elements is in a reverse-bias condition when the electric potential at the first end of the optical element is higher than the electric potential of the constant voltage regulated power source.