| US 7,510,783 B2 | ||
| Organic light-emitting element and display device | ||
| Takashi Moriyama, Kanagawa (Japan); Shinjiro Okada, Kanagawa (Japan); Akira Tsuboyama, Kanagawa (Japan); Takao Takiguchi, Tokyo (Japan); Seishi Miura, Kanagawa (Japan); Satoshi Igawa, Kanagawa (Japan); Jun Kamatani, Kanagawa (Japan); and Hironobu Iwawaki, Kanagawa (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Nov. 28, 2006, as Appl. No. 11/604,813. | ||
| Application 11/604813 is a division of application No. 10/477104, granted, now 7,189,466, previously published as PCT/JP03/06327, filed on May 21, 2003. | ||
| Claims priority of application No. 2002-162343 (JP), filed on Jun. 04, 2002. | ||
| Prior Publication US 2007/0085473 A1, Apr. 19, 2007 | ||
| Int. Cl. H01L 51/54 (2006.01) | ||
| U.S. Cl. 428—690 [428/917; 313/504; 313/506] | 3 Claims |
| 1. A simple matrix display device having a plurality of scanning lines and information lines comprising:
a plurality of organic light-emitting elements each comprising at least one light-emitting layer between a pair of electrodes
formed on a substrate and a plurality of light emission center materials included in the light-emitting layer, the pair of
electrodes being formed at the position where the scanning line and the information line cross; and
a driver for driving the organic light-emitting elements,
wherein at least one of the light emission center materials is a phosphorescent light-emitting material, and an excitation
lifetime of the light emission center material that emits light having a shortest wavelength is shorter than an excitation
lifetime of the other light emission center materials, and
wherein the light emission center materials comprise a blue emitting material, a green emitting material and a red emitting
material, an excitation lifetime τB of the blue emitting material, an excitation lifetime τG of the green emitting material
and an excitation lifetime τR of the red emitting material satisfy a relationship represented by τB<τR and τB<τG and a concentration
of the blue emitting material, the green emitting material and the red emitting material satisfies a relationship represented
by a blue emitting material > the green emitting material > the red emitting material.
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