Display device and driving method thereof, semiconductor device, and electronic apparatus
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHajime Kimura, Takuya Kimishima
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Abstract
To constitute a display panel only by transistors having the same conductivity type is difficult if a p-type transistor is adopted as a driving transistor. By constituting a circuit formed in the display panel by transistors having the same conductivity type, manufacturing process can be reduced, and cost reduction can be achieved. In the invention, an n-type transistor is used as a driving transistor for driving a light emitting element, and the driving transistor and the light emitting element constitute a source follower circuit.
Claims22
A semiconductor device comprising:
- a pixel, the pixel comprising:
- a light emitting element;
- a transistor;
- a capacitor;
- a first switch;
- a second switch;
- a third switch;
- a second line;
- a first line;
- a third line, and
- a fourth line;
- wherein a gate of the transistor is electrically connected to the second line via the capacitor,
- wherein one of a source and a drain of the transistor is electrically connected to an electrode of the light emitting element and electrically connected to the third line via the third switch,
- wherein the other of the source and the drain of the transistor is electrically connected to the first line via the first switch and electrically connected to the gate of the transistor via the second switch, and
- wherein the fourth line is electrically connected to the first switch.
A semiconductor device comprising:
- a pixel, the pixel comprising:
- a light emitting element;
- a transistor;
- a capacitor having two electrodes;
- a first switch;
- a second switch;
- a third switch;
- a fourth switch;
- a third line;
- a second line;
- a first line;
- and
- a fourth line,
- wherein a gate of the transistor is connected to one electrode of the capacitor,
- wherein the other electrode of the capacitor is connected to the third line via the third switch and connected to the second line via the fourth switch,
- wherein one of a source and a drain of the transistor is electrically connected to an electrode of the light emitting element,
- wherein the other of the source and the drain of the transistor is connected to the first line via the first switch and connected to the gate of the transistor via the second switch, and
- wherein the fourth line is electrically connected to the first switch.
Dependencies are inferred from the claim text.