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US 8,803,781 B2Granted
Semiconductor device and display device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHajime Kimura, Atsushi Umezaki
Life of this patent
Estimating the term…
Abstract
A single-crystal semiconductor layer is separated from a single-crystal semiconductor substrate and is fixed to an insulating substrate to form a TFT over the insulating substrate. Then, a driver circuit is formed using the TFT. The TFT has excellent current characteristics because an active layer is almost in a single-crystal state. Accordingly, a small thin display device with low power consumption can be manufactured. Further, a controller and a shift register which is included in a source driver are operated at the same power supply voltage. Thus, power consumption can be reduced.
Claims24
A semiconductor device comprising:
- a first substrate comprising:
- a controller circuit electrically connected to a power supply circuit which is configured to output a first potential, the entirety of the controller circuit being on the first substrate;
- and
- a second substrate comprising:
- a pixel portion comprising a first thin film transistor;
- and
- a shift register circuit electrically connected to the power supply circuit and the controller circuit,
- wherein the first potential is the highest potential in the controller circuit and in the shift register circuit,
- wherein the controller circuit is configured to be supplied with the first potential and a ground potential,
- wherein the controller circuit is configured to output a first signal to the shift register circuit,
- wherein the shift register circuit is configured to be supplied with the first potential, the ground potential and the first signal, and
- wherein the shift register circuit comprises a second thin film transistor.
9 more elements
A semiconductor device comprising:
- a first substrate comprising:
- a controller circuit electrically connected to a power supply circuit which is configured to output a first potential, the entirety of the controller circuit being on the first substrate;
- and
- a second substrate comprising:
- a pixel portion comprising a first thin film transistor;
- and
- a driver circuit electrically connected to the power supply circuit and the controller circuit,
- wherein the controller circuit is configured to be supplied with the first potential and a ground potential,
- wherein the controller circuit is configured to output a first signal to the driver circuit,
- wherein the driver circuit is configured to supply a video signal to the pixel portion,
- wherein the driver circuit comprises a shift register circuit configured to be supplied with the first potential, the ground potential and the first signal,
- wherein the first potential is the highest potential in the controller circuit and in the shift register circuit, and
- wherein the shift register circuit comprises a second thin film transistor.
10 more elements
A semiconductor device comprising:
- a first substrate comprising:
- a controller circuit electrically connected to a power supply circuit which is configured to output a first potential, the entirety of the controller circuit being on the first substrate;
- and
- a second substrate comprising:
- a pixel portion comprising a first thin film transistor;
- and
- a driver circuit electrically connected to the power supply circuit and the controller circuit,
- wherein the controller circuit is configured to be supplied with the first potential and a ground potential,
- wherein the controller circuit is configured to output a first signal to the driver circuit,
- wherein the driver circuit is configured to supply a selection signal to the pixel portion,
- wherein the driver circuit comprises a shift register circuit configured to be supplied with the first potential, the ground potential and the first signal,
- wherein the first potential is the highest potential in the controller circuit and in the shift register circuit, and
- wherein the shift register circuit comprises a second thin film transistor.
10 more elements
A semiconductor device comprising:
- a first substrate comprising:
- a controller circuit electrically connected to a power supply circuit which is configured to output a first potential, the entirety of the controller circuit being on the first substrate;
- and
- a second substrate comprising:
- a pixel portion comprising a first thin film transistor;
- a driver circuit electrically connected to the power supply circuit and the controller circuit, and configured to supply a video signal to the pixel portion;
- and
- a dc-dc converter circuit electrically connected to the power supply circuit, and configured to be supplied with the first potential and supply a second potential higher than the first potential to the driver circuit,
- wherein the controller circuit is configured to be supplied with the first potential and a ground potential,
- wherein the controller circuit is configured to output a first signal to the driver circuit,
- wherein the driver circuit comprises a shift register circuit configured to be supplied with the first potential, the ground potential and the first signal,
- wherein the first potential is the highest potential in the controller circuit and in the shift register circuit,
- wherein the shift register circuit comprises a second thin film transistor, and
- wherein the dc-dc converter circuit comprises a third thin film transistor.
11 more elements
A semiconductor device comprising:
- a first substrate comprising:
- a controller circuit electrically connected to a power supply circuit which is configured to output a first potential, the entirety of the controller circuit being on the first substrate;
- and
- a second substrate comprising:
- a pixel portion comprising a first thin film transistor;
- a driver circuit electrically connected to the power supply circuit and the controller circuit, and configured to supply a selection signal to the pixel portion;
- and
- a dc-dc converter circuit electrically connected to the power supply circuit, and configured to be supplied with the first potential and supply a second potential higher than the first potential to the driver circuit,
- wherein the controller circuit is configured to be supplied with the first potential and a ground potential,
- wherein the controller circuit is configured output a first signal,
- wherein the driver circuit comprises a shift register circuit configured to be supplied with the first potential, the ground potential and the first signal,
- wherein the first potential is the highest potential in the controller circuit and in the shift register circuit,
- wherein the shift register circuit comprises a second thin film transistor, and
- wherein the dc-dc converter circuit comprises a third thin film transistor.
11 more elements
Dependencies are inferred from the claim text.