| 摘要 |
Provided is a light-emitting device which can emit monochromatic lights with high color purity due to a microcavity effect and which can provide a white light with a broad spectrum when the monochromatic lights are combined. The light-emitting device has a red-, green-, blue-, and yellow-emissive light-emitting elements each of which has a reflective electrode and a semi-transmissive and semi-reflective electrode. The red-, green-, blue-, and yellow-emissive light-emitting elements have the same structure other than the reflective electrode and a layer in contact with the reflective electrode to selectively emit red, green, blue, and yellow lights, respectively. Red, green, and blue color filters are also provided over the red-, green-, blue-, light-emitting elements, respectively. An EL layer is commonly shared by the red-, green-, blue-, and yellow-emissive light-emitting elements, and the semi-transmissive and semi-reflective electrode covers an edge portion of the EL layer. |
| 主权项 |
1. A light-emitting device comprising:
first to fourth light-emitting elements, wherein: the first to fourth light-emitting elements each have a reflective electrode and a semi-transmissive and semi-reflective electrode over the reflective electrode with a white-emissive EL layer interposed therebetween; and the first to fourth light-emitting elements are optically optimized independently so that the first to fourth light-emitting elements selectively emit red light, green light, blue light, and yellow light, respectively. |
