| US 7,601,988 B2 | ||
| Light emitting device | ||
| Satoshi Seo, Kawasaki (Japan); Daisuke Kumaki, Tokamachi (Japan); Hisao Ikeda, Atsugi (Japan); and Junichiro Sakata, Atsugi (Japan) | ||
| Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi-shi, Kanagawa-ken (Japan) | ||
| Appl. No. 10/577,127 PCT Filed Sep. 22, 2005, PCT No. PCT/JP2005/018062 § 371(c)(1), (2), (4) Date Apr. 25, 2006, PCT Pub. No. WO2006/033472, PCT Pub. Date Mar. 30, 2006. |
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| Claims priority of application No. 2004-278520 (JP), filed on Sep. 24, 2004; application No. 2004-316089 (JP), filed on Oct. 29, 2004; and application No. 2004-316228 (JP), filed on Oct. 29, 2004. | ||
| Prior Publication US 2007/0131948 A1, Jun. 14, 2007 | ||
| Int. Cl. H01L 35/24 (2006.01) | ||
| U.S. Cl. 257—88 [257/98; 257/102; 257/103; 257/79; 257/40; 438/29] | 27 Claims |
| 1. A light-emitting device having at least first and second light-emitting elements exhibiting different emission colors,
each of the first and second light-emitting elements comprising:
a first electrode that has a non-light-transmitting property;
a first layer serving as a layer generating holes over and in contact with the first electrode;
a second layer serving as a layer including a light-emitting layer over the first layer;
a third layer serving as a layer generating electrons over the second layer; and
a second electrode that has a light transmitting property over the third layer,
wherein a thickness of the first layer of the first light-emitting element is different from that of the second light-emitting
element.
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