2005-031648 is referenced by 1 patents.

PROBLEM TO BE SOLVED: To provide a light emitting device capable of reducing the luminance variation of a light emitting element between pixels caused by the characteristic variation of a driving transistor without reducing the off-current of a switching transistor, and suppressing the risk of a process caused by increase in the number of wiring.SOLUTION: The light emitting ddevice is configured so that a current control transistor operated in a linear region is disposed in series with a driving transistor and a video signal for transmitting a signal of light emission or non-emission of a pixel is inputted to a gate of the current controlling transistor through a switching transistor is employed. 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 inputted to the gate thereof during light emission.

Element substrate and light emitting device
Application Number
Publication Number
Application Date
June 15, 2004
Publication Date
February 3, 2005
Osame Mitsuaki
Yamazaki Masaru
Anzai Aya
Fukumoto Ryota
Semiconductor Energy Lab
H05B 33/14
G09G 03/20
G09F 09/30
G09G 03/30