Patent ID: 8063855

Claim:
An EL display apparatus comprising: a display area in which pixels are arranged in a matrix, each of the pixels having an EL element; source signal lines which transfer an image signal to the pixels; gate signal lines; a source driver circuit; and a selection circuit; wherein each of the pixels has: a driver transistor which supplies an electric current to the EL element; a first switching transistor which supplies the image signal applied to the source signal lines to the driver transistor; a first capacitor connected to a gate terminal of the driver transistor, the first capacitor retaining a voltage which defines the electric current passing through the driver transistor; and a second capacitor having a first terminal and a second terminal, said first terminal being connected to said gate signal line and said second terminal being connected to said gate terminal of the driver transistor, wherein a gate terminal of the first switching transistor is connected to one of the gate signal lines, and capacity of the second capacitor changes a potential on the gate terminal of the driver transistor depending on variation of a voltage applied to the one of the gate signal lines, a change of said potential on the gate terminal of the driver transistor acts such that said driver transistor reduces said electric current supplied to said EL element, said source driver outputs a signal from a signal output terminal, said selection circuit has a plurality of groups, each one of said groups including one input terminal and a plurality of selection output terminals that can be connected with said one input terminal, each one of said input terminals is connected with said signal output terminal of said source driver circuit, and each one of said selection output terminals is connected with each one of said source signal lines, and said selection circuit selects one or more selection output terminals from said a plurality of selection output terminals and impresses said signal of said source driver circuit impressed to said input terminal of said selection circuit to said source signal line connected with said selected selection output terminal.