Patent ID: 9390641
Filing Date: 2016-07-12
CPC Classification: G09G,H01L

Claim Text:
1. A display device comprising: a pixel comprising a first transistor, a second transistor, a third transistor, an electroluminescent element, and a capacitor; a data signal line; a capacitor line; and a semiconductor layer, wherein a first terminal of the first transistor is electrically connected to a first terminal of the second transistor, wherein a second terminal of the second transistor is electrically connected to a first terminal of the electroluminescent element, wherein a gate of the first transistor is electrically connected to a first terminal of the capacitor, wherein a first terminal of the third transistor is electrically connected to the gate of the first transistor, wherein a second terminal of the third transistor is electrically connected to the data signal line, wherein the semiconductor layer includes the first terminal of the capacitor and a channel formation region of the third transistor, wherein the capacitor line includes a second terminal of the capacitor, wherein the second transistor is configured to operate in a saturation region to supply a current Id to the electroluminescent element when the first transistor operates in a linear region by controlling a voltage supplied to a gate of the second transistor, wherein the Id is defined by: where L wherein an amount of the current Id is controlled in accordance with a data signal supplied to the gate of the first transistor, and wherein the data signal line and the capacitor line overlap each other.