Light emitting device and electronic apparatus
AssigneeSeiko Epson Corporation
InventorTakayuki KITAZAWA
Life of this patent
Estimating the term…
Abstract
A light emitting device includes: pixel circuits, each of which includes a light emitting element and a drive transistor connected in series with each other and a holding capacitor disposed between a path connecting the light emitting element and the drive transistor and a gate of the drive transistor; and a drive circuit which supplies a drive signal to the gate of the drive transistor and changes a potential of the drive signal with the passage of time such that a time rate of change of the potential of the drive signal at the time point of stopping the supply of the drive signal becomes a time rate of change corresponding to a designated gradation of the pixel circuit.
Claims14
A light emitting device comprising:
- pixel circuits, each of which includes a light emitting element and a drive transistor connected in series with each other and a holding capacitor disposed between a path connecting the light emitting element and the drive transistor and a gate of the drive transistor;
- and
- a drive circuit which supplies a drive signal to the gate of the drive transistor and changes a potential of the drive signal with the passage of time such that a time rate of change of the potential of the drive signal at the time point of stopping the supply of the drive signal becomes a time rate of change corresponding to a designated gradation of the pixel circuit,
- wherein the drive circuit includes:
- a lamp signal generating unit which generates a lamp signal;
- and
- an amplitude control unit which is supplied with the lamp signal, adjusts the amplitude of the lamp signal in accordance with a gradation to be displayed, and outputs the adjusted signal, and
- wherein the drive circuit generates the drive signal based on the output signal from the amplitude control unit.
Dependencies are inferred from the claim text.