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US 6,724,012 B2Granted
Display matrix with pixels having sensor and light emitting portions
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorHajime Kimura
Life of this patent
Estimating the term…
Abstract
A semiconductor device in which a reduction in size and thinness are realized is provided. The semiconductor device of the present invention can realize a reduction in size by forming light emitting elements as a light source, and photodiodes as photoelectric conversion elements on the same substrate. Further, it becomes possible to control two signal lines by using one driver circuit with using an output switching circuit. As a result, it becomes possible to reduce the area occupied by the driver circuits of the semiconductor device, and the semiconductor device can be made smaller.
Claims112
A semiconductor device comprising:
- a signal line driver circuit;
- an output switching circuit connected to the signal line driver circuit;
- and
- a pixel portion comprising a plurality of pixels and connected to the output switching circuit,
- wherein each of the plurality of pixels comprises a sensor portion and a light emitting element portion,
- wherein the signal driver circuit outputs a timing signal to the output switching circuit, and
- wherein the output switching circuit outputs different signals to the sensor portion and to the light emitting element portion.
4 more elements
A semiconductor device comprising:
- a pixel portion comprising a plurality of pixels;
- a signal line driver circuit;
- and
- an output switching circuit,
- wherein each of the plurality of pixels comprises a sensor portion and a light emitting element portion,
- wherein the output switching circuit comprises a first logical circuit and a second logical circuit,
- wherein the first logic circuit is connected to the sensor portion via a first signal line and the second logic circuit is connected to the light emitting portion via a second signal line.
- wherein the signal line driver circuit outputs a timing signal to the first logical circuit and to the second logical circuit.
5 more elements
A semiconductor device comprising:
- a pixel portion comprising a plurality of pixels;
- a signal line driver circuit;
- and
- an output switching circuit,
- wherein each of the plurality of pixels comprises a sensor portion and a liquid crystal element portion,
- wherein the output switching circuit comprises a first logical circuit and a second logical circuit,
- wherein the first logic circuit is connected to the sensor portion via a first signal line and the second logic circuit is connected to the liquid crystal portion via a second signal line,
- wherein the signal line driver circuit outputs a timing signal to the first logical circuit and to the second logical circuit.
5 more elements
A semiconductor device comprising:
- a pixel portion comprising a plurality of pixels;
- a signal line driver circuit;
- and
- an output switching circuit connected to the signal line driver circuit,
- wherein each of the plurality of pixels comprises a sensor portion and a light emitting element portion,
- wherein the sensor portion comprises a first TFT, and the light emitting element portion comprises a second TFT,
- wherein the output switching circuit comprises a first logical circuit and a second logical circuit,
- wherein the first logic circuit is connected to the first TFT via a first signal line and the second logic circuit is connected to the second TFT via a second signal line,
- wherein the signal line driver circuit outputs a timing signal to the first logical circuit and to the second logical circuit.
6 more elements
A semiconductor device comprising:
- a pixel portion comprising a plurality of pixels;
- a signal line driver circuit;
- and
- an output switching circuit connected to the signal line driver circuit,
- wherein each of the plurality of pixels comprises a sensor portion and a liquid crystal element portion,
- wherein the sensor portion comprises a first TFT, and the liquid crystal element portion comprises a second TFT,
- wherein the output switching circuit comprises a first logical circuit and a second logical circuit,
- wherein the first logic circuit is connected to the first TFT via a first signal line and the second logic circuit is connected to the second TFT via a second signal line,
- wherein the signal line driver circuit outputs a timing signal to the first logical circuit and to the second logical circuit.
6 more elements
A semiconductor device comprising:
- a pixel portion having a plurality of pixels;
- a signal line driver circuit;
- and
- an output switching circuit connected to the signal line driver circuit,
- wherein each of the plurality of pixels comprises a sensor portion and a light emitting element portion,
- wherein the sensor portion comprises a first TFT, and the light emitting element portion comprises a second TFT,
- wherein the output switching circuit comprises a first logical circuit and a second logical circuit,
- wherein the first logic circuit is connected to the first TFT via a first signal line and the second logic circuit is connected to the second TFT via a second signal line,
- wherein the signal line driver circuit outputs a timing signal to the first logical circuit and to the second logical circuit,
- wherein light emitted from the light emitting element portion is reflected by a subject and irradiated to the sensor portion, and the sensor portion generates an image signal from the irradiated light.
7 more elements
A semiconductor device comprising:
- a pixel portion comprising a plurality of pixels;
- a signal line driver circuit;
- an output switching circuit connected to the signal line driver circuit;
- and
- one of a back light and a front light,
- wherein each of the plurality of pixels comprises a sensor portion and a liquid crystal element portion,
- wherein the sensor portion comprises a first TFT, and the liquid crystal element portion comprises a second TFT,
- wherein the output switching circuit comprises a first logical circuit and a second logical circuit,
- wherein the first logic circuit is connected to the first TFT via a first signal line and the second logic circuit is connected to the second TFT via a second signal line,
- wherein the signal line driver circuit outputs a timing signal to the first logical circuit and to the second logical circuit,
- wherein light emitted from one of the back light and the front light is reflected by a subject and irradiated to the sensor portion, and the sensor portion generates an image signal from the irradiated light, and
- wherein the first logical circuit outputs a pulse signal to the first signal line, and the second logic circuit outputs an on signal to the second signal line.
9 more elements
Dependencies are inferred from the claim text.