Patent ID: 7742064
Filing Date: 2010-06-22
Classification: G09G

Abstract:
1. A signal line driver circuit comprising: a constant current circuit, the constant current circuit including a plurality of current source circuits corresponding to a plurality of wirings; a shift register, the shift register including a plurality of flip-flop circuits, each of the plurality of flip-flop circuits being disposed for each of the plurality of wirings; a first latch circuit, the first latch circuit being electrically connected to the shift register; and a second latch circuit, the second latch circuit being electrically connected to the first latch circuit and the constant current circuit, wherein, the plurality of current source circuits each comprises capacitor means and supply means; and the plurality of current source circuits each converts a supplied current to a voltage in accordance with a setting signal, and supplies a current corresponding to the converted voltage; the current is supplied to a pixel portion comprising a plurality of pixels, and the plurality of pixels each includes a thin film transistor, a capacitor and a light emitting element.