Light-emitting device having singlet and triplet compounds
First Claim
Patent Images
1. A light-emitting device comprising:
- a substrate; and
a first light-emitting element, a second light-emitting element, and a third light-emitting element over the substrate,wherein the first light-emitting element includes a first light-emitting layer, the second light-emitting element includes a second light-emitting layer, and the third light-emitting element includes a third light-emitting layer,wherein the first light-emitting layer comprises a first triplet compound capable of emitting red light,wherein the second light-emitting layer comprises a second triplet compound capable of emitting green light,wherein the third light-emitting layer comprises a singlet compound capable of emitting blue light, andwherein an operation voltage of the first light-emitting element, an operation voltage of the second light-emitting element, and an operation voltage of the third light-emitting element are made the same as one another.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided a light emitting device which enables a color display with good color balance. A triplet compound is used for a light emitting layer of an EL element that emits red color, and a singlet compound is used for a light emitting layer of an EL element that emits green color and a light emitting layer of an EL element that emits blue color. Thus, an operation voltage of the EL element emitting red color may be made the same as the EL element emitting green color and the EL element emitting blue color. Accordingly, the color display with good color balance can be realized.
-
Citations
19 Claims
-
1. A light-emitting device comprising:
-
a substrate; and a first light-emitting element, a second light-emitting element, and a third light-emitting element over the substrate, wherein the first light-emitting element includes a first light-emitting layer, the second light-emitting element includes a second light-emitting layer, and the third light-emitting element includes a third light-emitting layer, wherein the first light-emitting layer comprises a first triplet compound capable of emitting red light, wherein the second light-emitting layer comprises a second triplet compound capable of emitting green light, wherein the third light-emitting layer comprises a singlet compound capable of emitting blue light, and wherein an operation voltage of the first light-emitting element, an operation voltage of the second light-emitting element, and an operation voltage of the third light-emitting element are made the same as one another. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A light-emitting device comprising:
-
a substrate; a first transistor; a second transistor; a first pixel electrode electrically connected to the first transistor; a second pixel electrode electrically connected to the second transistor; a first light-emitting layer over the first pixel electrode; a second light-emitting layer over the second pixel electrode; an electrode over the first light-emitting layer and the second light-emitting layer; and wherein the first light-emitting layer comprises a triplet compound capable of emitting red light, and wherein the second light-emitting layer comprises a singlet compound capable of emitting blue light. - View Dependent Claims (7, 8, 9, 10, 11, 12)
-
-
13. A light-emitting device comprising:
-
a substrate; a first transistor; a second transistor; a first pixel electrode electrically connected to the first transistor; a second pixel electrode electrically connected to the second transistor; a first light-emitting layer over the first pixel electrode; a second light-emitting layer over the second pixel electrode; and an electrode over the first light-emitting layer and the second light-emitting layer, wherein the first light-emitting layer comprises a triplet compound capable of emitting red light, wherein the second light-emitting layer comprises a singlet compound capable of emitting blue light, and wherein the red light and the blue light are irradiated toward a top surface of the electrode. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
Specification