Granted Patent B2

US 12,477,918 · App. 17/685,821 · Granted Nov 18, 2025

Inventors: Kenichi Okazaki (Tochigi, JP); Daiki Nakamura (Kanagawa, JP); Rai Sato (Tochigi, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

H10K59/38H10K59/124H10K59/1201

Abstract

Claims (53)

1 . A display apparatus comprising:

a first light-emitting device comprising a first pixel electrode, a first light-emitting layer over the first pixel electrode, and a common electrode over the first light-emitting layer;

a second light-emitting device comprising a second pixel electrode, a second light-emitting layer over the second pixel electrode, and the common electrode over the second light-emitting layer;

a first insulating layer over the first pixel electrode and the second pixel electrode;

a second insulating layer over the first insulating layer;

a first color conversion layer overlapping with the first light-emitting device; and

a second color conversion layer overlapping with the second light-emitting device,

wherein the first insulating layer covers an end portion of the first pixel electrode and an end portion of the second pixel electrode,

wherein the second insulating layer is in direct contact with side surfaces of the first light-emitting layer and the second light-emitting layer,

wherein the first light-emitting device and the second light-emitting device are each configured to emit blue light,

wherein the first color conversion layer is configured to convert light emitted from the first light-emitting device into light having a different wavelength, and

wherein the second color conversion layer is configured to convert light emitted from the second light-emitting device into light having a different wavelength.

2 . The display apparatus according to claim 1 , further comprising a third insulating layer,

wherein the second insulating layer comprises an inorganic material,

wherein the third insulating layer comprises an organic material, and

wherein the third insulating layer overlaps the first insulating layer with the second insulating layer therebetween.

3 . The display apparatus according to claim 1 ,

wherein the first light-emitting device comprises a common layer between the first light-emitting layer and the common electrode,

wherein the second light-emitting device comprises the common layer between the second light-emitting layer and the common electrode, and

wherein the common layer comprises at least one of a hole-injection layer, a hole-blocking layer, a hole-transport layer, an electron-transport layer, an electron-blocking layer, and an electron-injection layer.

4 . The display apparatus according to claim 1 ,

wherein the first light-emitting layer and the second light-emitting layer comprise the same material.

5 . The display apparatus according to claim 1 ,

wherein the first color conversion layer and the second color conversion layer each comprise quantum dots.

6 . The display apparatus according to claim 1 ,

wherein the first color conversion layer and the second color conversion layer each comprise a fluorescent material.

7 . The display apparatus according to claim 1 , further comprising a third light-emitting device emitting blue light.

8 . A display module comprising:

the display apparatus according to claim 1 ; and

at least one of a connector and an integrated circuit.

9 . An electronic device comprising:

the display module according to claim 8 ; and

at least one of a housing, a battery, a camera, a speaker, and a microphone.

10 . A method for manufacturing a display apparatus, comprising:

forming a first pixel electrode and a second pixel electrode over an insulating surface;

forming a first insulating layer covering an end portion of the first pixel electrode and an end portion of the second pixel electrode;

forming a first layer over the first pixel electrode and the second pixel electrode;

forming a first sacrificial layer over the first layer;

processing the first layer and the first sacrificial layer, thereby forming a second layer over the first pixel electrode, a second sacrificial layer over the second layer, a third layer over the second pixel electrode, and a third sacrificial layer over the third layer;

forming a first insulating film covering at least a top surface of the first insulating layer, a side surface of the second layer, a side surface of the third layer, a side surface and a top surface of the second sacrificial layer, and a side surface and a top surface of the third sacrificial layer;

processing the first insulating film, thereby forming a second insulating layer covering at least the top surface of the first insulating layer, the side surface of the second layer, and the side surface of the third layer;

removing the second sacrificial layer and the third sacrificial layer;

forming a common electrode over the second layer and the third layer; and

forming, over the common electrode, a first color conversion layer overlapping the second layer and a second color conversion layer overlapping the third layer.

11 . The method for manufacturing a display apparatus, according to claim 10 , further comprising:

forming, as the first sacrificial layer, a first sacrificial film and a second sacrificial film over the first sacrificial film;

forming a first resist mask over the second sacrificial film, and then processing the second sacrificial film by using the first resist mask;

removing the first resist mask;

processing the first sacrificial film by using the processed second sacrificial film as a mask; and

processing the first layer by using the processed first sacrificial film as a mask.

12 . The method for manufacturing a display apparatus, according to claim 10 , further comprising:

removing the second sacrificial layer and the third sacrificial layer, and then forming a fourth layer over the second layer and the third layer; and

forming the common electrode over the fourth layer.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (70)