Patent Number: 6,297,518

Title: Active matrix display and electrooptical device

Abstract: A structure for reducing the OFF current of an active matrix display. In the active matrix display, plural TFTs are connected in series with each one pixel electrode. Of these TFTs connected in series, at least one TFT excluding the TFTs located at opposite ends is maintained in conduction. Alternatively, at least one capacitor is connected between the junction of the drain and source of each TFT connected in series and an AC grounded point. Thus, the amount of electric charge released from auxiliary capacitors during cutoff of the TFTs is reduced.

Inventors: Zhang; Hongyong (Kanagawa, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

International Classification: G02F 1/13 (20060101); G02F 1/1362 (20060101); G09G 3/36 (20060101); H01L 29/66 (20060101); H01L 29/786 (20060101); H01L 029/04 ()

Expiration Date: 10/02/2018