| US 7,589,698 B2 | ||
| Display device, semiconductor device, and electronic device | ||
| Mitsuaki Osame, Kanagawa (Japan); Aya Anzai, Kanagawa (Japan); Yu Yamazaki, Tokyo (Japan); Tamae Takano, Kanagawa (Japan); and Takashi Hamada, Kanagawa (Japan) | ||
| Assigned to Semiconductor Energy Laboratory Co., Ltd., Kanagawa-Ken (Japan) | ||
| Filed on Mar. 17, 2004, as Appl. No. 10/801,542. | ||
| Claims priority of application No. 2003-072412 (JP), filed on Mar. 17, 2003. | ||
| Prior Publication US 2004/0238831 A1, Dec. 02, 2004 | ||
| Int. Cl. G09G 3/30 (2006.01) | ||
| U.S. Cl. 345—76 [345/39; 345/92; 345/204; 345/205; 345/206] | 22 Claims |
| 1. A display device comprising plural pixels, at least one of the plural pixels comprising:
a light emitting element;
a first thin film transistor, a second thin film transistor, and a third thin film transistor;
a first gate signal line, and a second gate signal line, a source signal line, and a current supply line,
wherein a gate of the first thin film transistor is electrically connected to the first gate signal line and a second terminal
of the third thin film transistor,
wherein a first terminal of the first thin film transistor is electrically connected to the source signal line,
wherein a second terminal of the first thin film transistor is electrically connected to a gate of the second thin film transistor
and a first terminal of the third thin film transistor,
wherein a first terminal of the second thin film transistor is electrically connected to the current supply line,
wherein a second terminal of the second thin film transistor is electrically connected to the light emitting element,
wherein a second terminal of the third thin film transistor is electrically connected to the first gate signal line,
wherein a gate of the third thin film transistor is electrically connected to the second gate signal line, and
wherein a channel of the second thin film transistor is folded and orients in a plurality of directions.
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