Patent ID: 8432380

Claim:
A display apparatus comprising: a plurality of luminescent devices aligned periodically in a row direction and in a column direction; a plurality of pixel circuits aligned periodically in the row direction and in the column direction for supplying an electric current to each of the luminescent devices; a plurality of data lines each connected commonly to the pixel circuits aligned periodically in the column direction for supplying signal currents to these pixel circuits; and a plurality of column-current generating circuits connected to the plurality of data lines respectively for supplying signal currents to the corresponding data lines, each of the column-current generating circuits having a plurality of transistor devices, each of the plurality of transistor devices having a gate that operates as a control electrode and a source and a drain that operate as main electrodes, with the gates, the sources and the drains respectively of the plurality of transistor devices being connected commonly in parallel, the plurality of transistor devices being capable of retaining a signal as an electric potential of the commonly connected control electrodes and outputting a signal current corresponding to the electric potential from the commonly connected main electrodes, wherein each of the transistor devices includes a semiconductor layer formed into polycrystalline by irradiating an amorphous semiconductor layer with a laser beam having an elongated irradiation surface such that the elongated irradiation surface scans the amorphous semiconductor layer in the column direction, with the elongated irradiation surface having a longitudinal direction in the row direction, and wherein the plurality of transistor devices in each of the column-current generating circuits are arranged in an offset manner in more than a single row and more than a single column.