Title:
半導体装置、表示装置、及び電子機器
Document Type and Number:
Japanese Patent JP4558509
Kind Code:
B2
Abstract:
The invention provides a semiconductor device having a transistor that can supply a proper current to a load (EL pixel and signal line) without being influenced by variations. A voltage of each terminal of a transistor is controlled by a feedback circuit using an amplifier circuit. A current Idata is inputted from a current source circuit to the transistor, and the feedback circuit sets a gate-source voltage that the transistor requires for supplying the current Idata. The feedback circuit controls the transistor to operate in a saturation region. Then, a gate voltage required for supplying the current Idata is set. When using the transistor set in this manner, a proper current can be supplied to a load (EL pixel and signal line). Note that a required gate voltage can be set quickly because of an amplifier circuit.
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Inventors:
Hajime Kimura
Application Number:
JP2004567195A
Publication Date:
October 06, 2010
Filing Date:
April 07, 2004
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
G05F3/24; G09G3/20; G09G3/30
Domestic Patent References:
| JP2001022323A | 2001-01-26 | |||
| JP2002072964A | 2002-03-12 | |||
| JP2001308195A | 2001-11-02 | |||
| JP2003043994A | 2003-02-14 | |||
| JPS63229509A | 1988-09-26 | |||
| JP2000112548A | 2000-04-21 | |||
| JPH09319323A | 1997-12-12 | |||
| JP2002278499A | 2002-09-27 | |||
| JP2002221936A | 2002-08-09 | |||
| JP2002151276A | 2002-05-24 |