07742024 is referenced by 1 patents and cites 34 patents.

No need of lowering off-current of a switching transistor, fewer luminance variations of a light emitting element between pixels due to characteristic variations of a driving transistor, and less risk of steps due to increase in the number of wirings. A video signal for light emission or non-emission of a pixel is input to a gate of a current controlling transistor operated in a linear region, which is connected in series with the driving transistor, through a switching transistor. Since a voltage Vds between a source and a drain of the current controlling transistor is small, small changes in a voltage Vgs between a gate and a source thereof do not affect a current flowing in a load. The current flowing in the light emitting element is determined by the driving transistor operated in a saturation region, and a fixed potential is input to the gate thereof during light emission.

Title
Element substrate and light emitting device
Application Number
11/549946
Publication Number
7742024 (B2)
Application Date
October 16, 2006
Publication Date
June 22, 2010
Inventor
Mitsuaki Osame
Atsugi
JP
Yu Yamazaki
Atsugi
JP
Aya Anzai
Kanagawa-ken
JP
Ryota Fukumoto
Atsugi
JP
Agent
Fish & Richardson P C
Assignee
Semiconductor Energy Laboratory
JP
IPC
G09G 3/30
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