US 8,044,598 B2 · Light-emitting device

Abstract

The amplitude of a potential of a signal line is decreased and a scan line driver circuit is prevented from being excessively loaded. A light-emitting device includes a light-emitting element; a first power supply line having a first potential; a second power supply line having a second potential; a first transistor for controlling a connection between the first power supply line and the light-emitting element; a second transistor, which is controlled in accordance with a video signal, whether outputting the second potential applied from the second power supply line or not; a switching element for selecting either the first potential applied from the first power supply line or the output of the second transistor; and a third transistor for selecting whether the first potential or the output of the second transistor which is selected by the switch is applied to a gate of the first transistor.

Claims19

Dependent claims

A light-emitting device comprising:

a light-emitting element;
a first power supply line having a first potential;
a second power supply line having a second potential;
a first transistor for controlling conduction between the first power supply line and the light-emitting element;
a second transistor for controlling whether the second potential applied from the second power supply line is outputted depending on a video signal inputted to a gate of the second transistor;
a switch for selecting either the first potential applied from the first power supply line or an output of the second transistor;
and
a third transistor for selecting whether either the first potential or the output of the second transistor selected by the switch is applied to a gate of the first transistor.

5 more elements

Dependencies are inferred from the claim text.

Light-emitting device

Life of this patent

Light-emitting device

Life of this patent

Abstract

Claims19