| US 7,548,022 B2 | ||
| Electroluminescence device | ||
| Takahiro Ibe, Kanagawa (Japan) | ||
| Assigned to Semiconductor Energy Laboratory Co., Ltd., (Japan) | ||
| Filed on Mar. 29, 2007, as Appl. No. 11/729,925. | ||
| Application 11/729925 is a continuation of application No. 10/763101, filed on Jan. 22, 2004, granted, now 7,199,521. | ||
| Claims priority of application No. 2003-020152 (JP), filed on Jan. 29, 2003. | ||
| Prior Publication US 2007/0182315 A1, Aug. 09, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H05B 33/12 (2006.01) | ||
| U.S. Cl. 313—506 [313/509] | 17 Claims |
| 1. A mobile telephone comprising a display part, the display part having an electroluminescence display device, the electroluminescence
display device comprising:
a first electrode formed over a substrate;
a first electroluminescent film in contact with the first electrode;
a second electrode in contact with the first electroluminescent film;
a second electroluminescent film in contact with the second electrode; and
a transparent third electrode in contact with the second electroluminescent film,
wherein an electric current flow direction through the first electroluminescent film is different from an electric current
flow direction through the second electroluminescent film.
|