Granted Patent B2

US 12,300,174 · App. 18/294,395 · Granted May 13, 2025

Inventors: Koji Kusunoki (Kanagawa, JP); Susumu Kawashima (Kanagawa, JP); Tomoaki Atsumi (Kanagawa, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

G09G3/3233G09G3/006G09G2300/0819G09G2300/0842G09G2320/0233G09G2320/0295G09G2320/045G09G2330/021

Abstract

Claims (46)

1. A correction method of a display apparatus comprising a pixel, a first circuit, and a second circuit,

wherein the pixel comprises a light-emitting element, a first transistor, and a capacitor,

wherein a first terminal of the first transistor is electrically connected to a first electrode of the light-emitting element and a first terminal of the capacitor,

wherein the first circuit is electrically connected to the first electrode of the light-emitting element,

wherein the second circuit is electrically connected to a gate of the first transistor, and

wherein the first transistor is configured to control a current supplied to the light-emitting element on the basis of a first signal supplied from the second circuit to the pixel,

the correction method comprising:

a first processing step in which a voltage correcting a threshold voltage of the first transistor is obtained and the voltage is held in the capacitor;

a second processing step in which after the first processing step, a current flowing through the light-emitting element is measured and a second signal based on the current flowing through the light-emitting element is generated in the first circuit;

a third processing step in which after the second processing step, the first signal correcting image data using the second signal is generated in the second circuit; and

a fourth processing step in which after the third processing step, the first signal is supplied to the pixel.

2. The correction method of a display apparatus, according to claim 1 ,

wherein the first transistor comprises a back gate electrically connected to a second terminal of the capacitor,

wherein the first transistor is configured to control a threshold voltage of the first transistor, on the basis of a potential supplied to the back gate, and

wherein a voltage between the back gate and the first terminal of the first transistor is obtained in the first processing step.

3. The correction method of a display apparatus, according to claim 1 ,

wherein the first signal is supplied to the gate of the first transistor in the fourth processing step.

4. The correction method of a display apparatus, according to claim 1 ,

wherein the pixel further comprises a second transistor and a third transistor,

wherein the second circuit is electrically connected to the gate of the first transistor through a first terminal of the second transistor and a second terminal of the second transistor,

wherein the first circuit is electrically connected to the first electrode of the light-emitting element through a first terminal of the third transistor and a second terminal of the third transistor, and

wherein a gate of the second transistor and a gate of the third transistor are electrically connected to a first wiring.

5. A correction method of a display apparatus comprising a pixel, a first circuit, and a second circuit,

wherein the pixel comprises a light-emitting element, a first transistor, and a capacitor,

wherein a first terminal of the first transistor is electrically connected to a first electrode of the light-emitting element and a first terminal of the capacitor,

wherein the first circuit is electrically connected to the first electrode of the light-emitting element,

wherein the second circuit is electrically connected to a gate of the first transistor, and

wherein the first transistor is configured to control a current supplied to the light-emitting element on the basis of a first signal supplied from the second circuit to the pixel,

the correction method comprising:

a second processing step in which a current flowing through the light-emitting element is measured and a second signal based on the current flowing through the light-emitting element is generated in the first circuit;

a first processing step in which after the second processing step, a voltage correcting a threshold voltage of the first transistor is obtained and the voltage is held in the capacitor;

a third processing step in which after the second processing step, the first signal correcting image data using the second signal is generated in the second circuit; and

a fourth processing step in which after the first processing step and the third processing step, the first signal is supplied to the pixel.

6. The correction method of a display apparatus, according to claim 5 ,

wherein the first processing step and the third processing step are performed at the same time.

7. The correction method of a display apparatus, according to claim 5 ,

wherein the first transistor comprises a back gate electrically connected to a second terminal of the capacitor,

wherein the first transistor is configured to control a threshold voltage of the first transistor, on the basis of a potential supplied to the back gate, and

wherein a voltage between the back gate and the first terminal of the first transistor is obtained in the first processing step.

8. The correction method of a display apparatus, according to claim 5 ,

wherein the first signal is supplied to the gate of the first transistor in the fourth processing step.

9. The correction method of a display apparatus, according to claim 5 ,

wherein the pixel further comprises a second transistor and a third transistor,

wherein the second circuit is electrically connected to the gate of the first transistor through a first terminal of the second transistor and a second terminal of the second transistor,

wherein the first circuit is electrically connected to the first electrode of the light-emitting element through a first terminal of the third transistor and a second terminal of the third transistor, and

wherein a gate of the second transistor and a gate of the third transistor are electrically connected to a first wiring.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (53)