Patent ID: 8421715
Filing Date: 2013-04-16
Classification: G09G

Abstract:
1. A display device comprising: a first current source for supplying a constant current; a first monitoring element including a first electrode and a second electrode, the second electrode of the first monitoring element being electrically connected to the first current source via a first switch; a second monitoring element including a first electrode and a second electrode, the second electrode of the second monitoring element being electrically connected to the first current source via a second switch; and a light emitting element including a first electrode and a second electrode, the second electrode of the light emitting element being electrically connected to the first current source via a buffer amplifier and a driving transistor, wherein the first electrodes of the first and second monitoring elements and the first electrode of the light emitting element are electrically connected to an electrode fixed at a constant potential, wherein the first and second monitoring elements and the light emitting element comprise the same materials and are provided over a substrate, and wherein the buffer amplifier is configured to detect a potential of the second electrode of an emitting one of the first and second monitoring elements when the first and second switches are alternately turned ON.