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US 6,583,576 B2Granted
Light-emitting device, and electric device using the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorJun Koyama
Life of this patent
Estimating the term…
Abstract
In order to obtain a light-emitting device having a higher aperture ratio in pixels than that of the prior art, a source signal line and a current supply line to be connected with a pixel unit are switched by a switching circuit to use a common wiring line, so that the number of wiring lines in the pixel unit is reduced to realize the high aperture ratio.
Claims26
A light-emitting device comprising:
- a pixel formed over a substrate;
- a thin film transistor formed over said substrate and electrically connected to said pixel;
- a gate signal line and a wiring line formed so as to intersect with each other,
- wherein said wiring line is electrically and alternately interchanged to one of a source signal line and a current supply line.
1 more element
A light-emitting device comprising:
- a plurality of pixels over a substrate;
- a plurality of gate signal lines, and a plurality of source signal lines;
- and
- a plurality of switching TFTs, and a plurality of current controlling TFTs,
- wherein either drain regions or source regions of said switching TFTs are electrically connected with said plurality of source signal lines and with source regions of said current controlling TFTs of adjacent pixels.
2 more elements
A light-emitting device comprising:
- a plurality of pixels;
- a plurality of gate signal lines, and a plurality of source signal lines;
- a plurality of current supply lines;
- and
- a plurality of switching TFTs, and a plurality of current controlling TFTs
- wherein either source regions or drain regions of said switching TFTs in pixels of (x−1)-th column are electrically connected with said plurality of current supply lines of said pixels of said (x−2)-th column, when either drain regions or source regions of said switching TFTs in pixels of (x−2)-th column are electrically connected with said plurality of source signal lines.
3 more elements
A light-emitting device comprising:
- a pixel formed over a substrate;
- a thin film transistor formed over said substrate and electrically connected to said pixel;
- a gate signal line and a wiring line formed so as to intersect with each other,
- wherein said wiring line functions as a source signal line and a current supply line.
1 more element
A light-emitting device comprising:
- a pixel formed over a substrate;
- a thin film transistor formed over said substrate and electrically connected to said pixel;
- a switching circuit formed over said substrate;
- a gate signal line and a wiring line formed so as to intersect with each other,
- wherein said wiring line is electrically and alternately interchanged to one of a source signal line and a current supply line by said switching circuit.
2 more elements
Dependencies are inferred from the claim text.