07141934 is referenced by 19 patents and cites 19 patents.

A light emitting device and an element substrate which are capable of suppressing variations in the luminance intensity of a light emitting element among pixels due to characteristic variations of a driving transistor without suppressing off-current of a switching transistor low and increasing storage capacity of a capacitor. According to the invention, a depletion mode transistor is used as a driving transistor. The gate of the driving transistor is fixed in its potential or connected to the source or drain thereof to operate in a saturation region with a constant current flow. A current controlling transistor which operates in a linear region is connected in series to the driving transistor, and a video signal for transmitting a light emission or non-emission of a pixel is inputted to the gate of the current controlling transistor through a switching transistor.

Title
Element substrate and light emitting device
Application Number
10/799857
Publication Number
7141934 (B2)
Application Date
March 15, 2004
Publication Date
November 28, 2006
Inventor
Yu Yamazaki
Kanagawa
JP
Aya Anzai
Kanagawa
JP
Mitsuaki Osame
Kanagawa
JP
Agent
Fish & Richardson P C
Assignee
Semiconductor Energy Laboratory
JP
IPC
G09G 5/00
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