Light emitting apparatus, driving circuit of light emitting element, and driving method

摘要

A light emitting apparatus includes a light emitting element, a driving circuit which has a driving transistor having a gate, a drain, and a source, and a capacitor having one end connected to the gate, a power line, and first and second voltage lines, and, in a period in which the gate and the drain are short-circuited and the drain and the light emitting element are blocked, the source is connected to the first voltage line and the other end of the capacitor is connected to the second voltage line to hold a voltage in the capacitor, and, in a period in which the gate and the drain are disconnected and the drain and the light emitting element are connected, the source is connected to the power line, and the other end of the capacitor is connected to the source to supply a current to the light emitting element.

主权项

1. A light emitting apparatus comprising:
a light emitting element; a driving circuit including a driving transistor, a first switch provided between a gate and a drain of the driving transistor, a second switch provided between the drain of the driving transistor and one end of the light emitting element and a capacitor one end of which is connected to the gate of the driving transistor; a power line configured to supply a power source voltage to the driving circuit; and a first voltage line and a second voltage line configured to supply a first voltage and a second voltage, respectively, to the driving circuit, wherein the driving circuit includes a third switch which connects a source of the driving transistor to the power line and the first voltage line alternately, and a fourth switch which connects the other end of the capacitor to the source of the driving transistor and the second voltage line alternately, and the first to fourth switches are controlled such that, in a first period in which the first switch is on and the second switch is off, the third switch connects the source of the driving transistor to the first voltage line and the fourth switch connects the other end of the capacitor to the second voltage line, and in a second period in which the first switch is off and the second switch is on, the third switch connects the source of the driving transistor to the power line and the fourth switch connects the other end of the capacitor to the source of the driving transistor.