Patent ID: 8194006

Claim:
A display device comprising: a first signal line driver circuit electrically connected to n first signal lines; a second signal line driver circuit electrically connected to m second signal lines; a pixel portion comprising (n×m) pixels arranged in matrix corresponding to the n first signal lines and the m second signal lines, wherein each of the (n×m) pixels includes a light emitting element; and a voltage source circuit comprising: m monitor elements arranged between the second signal line driver circuit and the pixel portion along the second signal line driver circuit so that each of the m monitor elements corresponds to each of m rows of (n×m) pixels; i current sources each of which supplies a current to corresponding j monitor elements of the m monitor elements; m first switches, each of which controls supplying a current from a corresponding current source of the i current sources to a corresponding monitor element of the m monitor elements; k amplifiers; k capacitor elements, each of which is electrically connected to an input terminal of a corresponding amplifier of the k amplifiers; and k second switches, each of which controls an electrical connection between an input terminal of a corresponding amplifier of the k amplifiers and a corresponding current source of the i current sources, wherein each of the k amplifiers generates a first voltage according to a second voltage generated at each of corresponding (m/k) monitor elements, wherein each of the k amplifiers applies the first voltage to each of (n×m/k) light emitting elements included in corresponding (m/k) rows of the (n×m) pixels, wherein each of n and m is a natural number, and wherein each of i, j and k is a natural number less than or equal to m.