Back to results
US 9,123,672 B2Granted
Semiconductor device
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.
Claims85
A semiconductor device configured to selectively drive either of a sensor portion and a light emitting portion from a shift register output, comprising:
- a pixel portion comprising a pixel, the pixel comprising the sensor portion and the light emitting element portion;
- a selection signal line drive circuit comprising a shift register configured to output a signal;
- a selection output switching circuit electrically connected to the shift register, the selection output switching circuit comprising a first logical circuit and a second logical circuit each comprising a first input terminal electrically connected to the shift register, and
- a mode control wiring electrically connected to a second input terminal of the first logical circuit and to a second input terminal of the second logical circuit, the first and second logical circuits of the selection output switching circuit being configured to receive from the mode control wiring a read in mode signal and a display mode signal,
- wherein the sensor portion and the light emitting element portion are electrically connected to an output terminal of the first logical circuit and to an output terminal of the second logical circuit, respectively,
- wherein the selection signal line drive circuit is configured to output the signal to the first input terminal of the first logical circuit and to the first input terminal of the second logical circuit, and
- wherein the selection output switching circuit is configured to transmit the outputted signal exclusively to the sensor portion when the read in mode signal is received and is configured to transmit the outputted signal exclusively to the light emitting element portion when the display mode signal is received.
4 more elements
A semiconductor device configured to selectively drive either of a sensor portion and a liquid crystal element portion from a shift register output, comprising:
- a pixel portion comprising a pixel, the pixel comprising the sensor portion and the liquid crystal element portion;
- a selection signal line drive circuit comprising a shift register configured to output a signal;
- a selection output switching circuit electrically connected to the shift register, the selection output switching circuit comprising a first logical circuit and a second logical circuit each comprising a first input terminal electrically connected to the shift register, and
- a mode control wiring electrically connected to a second input terminal of the first logical circuit and to a second input terminal of the second logical circuit, the first and second logical circuits of the selection output switching circuit being configured to receive from the mode control wiring a read in mode signal and a display mode signal,
- wherein the sensor portion and the liquid crystal element portion are electrically connected to an output terminal of the first logical circuit and to an output terminal of the second logical circuit, respectively,
- wherein the selection signal line drive circuit is configured to output the signal to the first input terminal of the first logical circuit and to the first input terminal of the second logical circuit, and
- wherein the selection output switching circuit is configured to transmit the outputted signal exclusively to the sensor portion when the read in mode signal is received and is configured to transmit the outputted signal exclusively to the liquid crystal element portion when the display mode signal is received.
4 more elements
A semiconductor device configured to selectively drive either of a sensor portion and a light emitting portion from a shift register output, comprising:
- a pixel portion comprising a pixel, the pixel comprising the sensor portion and the light emitting element portion;
- a selection signal line drive circuit comprising a shift register configured to output a signal;
- a selection output switching circuit electrically connected to the shift register, the selection output switching circuit comprising a first logical circuit and a second logical circuit each comprising a first input terminal electrically connected to the shift register,
- a mode control wiring electrically connected to a second input terminal of the first logical circuit and to a second input terminal of the second logical circuit, the first and second logical circuits of the selection output switching circuit being configured to receive from the mode control wiring a read in mode signal and a display mode signal, and
- a first transistor in the sensor portion and a second transistor in the light emitting element portion,
- wherein a gate of the first transistor is electrically connected to the first logical circuit, and a gate of the second transistor is electrically connected to the second logical circuit,
- wherein the selection signal line drive circuit is configured to output the signal to the first input terminal of the first logical circuit and to the first input terminal of the second logical circuit, and
- wherein the selection output switching circuit is configured to transmit the outputted signal exclusively to the gate of the first transistor when the read in mode signal is received and is configured to transmit the outputted signal exclusively to the gate of the second transistor when the display mode signal is received.
5 more elements
A semiconductor device configured to selectively drive either of a sensor portion and a liquid crystal element portion from a shift register output, comprising:
- a pixel portion comprising a pixel, the pixel comprising the sensor portion and the liquid crystal element portion;
- a selection signal line drive circuit comprising a shift register configured to output a signal;
- a selection output switching circuit electrically connected to the shift register, the selection output switching circuit comprising a first logical circuit and a second logical circuit each comprising a first input terminal electrically connected to the shift register,
- a mode control wiring electrically connected to a second input terminal of the first logical circuit and to a second input terminal of the second logical circuit, the first and second logical circuits of the selection output switching circuit being configured to receive from the mode control wiring a read in mode signal and a display mode signal, and
- a first transistor in the sensor portion and a second transistor in the liquid crystal element portion,
- wherein a gate of the first transistor is electrically connected to the first logical circuit, and a gate of the second transistor is electrically connected to the second logical circuit,
- wherein the selection signal line drive circuit is configured to output the signal to the first input terminal of the first logical circuit and to the first input terminal of the second logical circuit, and
- wherein the selection output switching circuit is configured to transmit the outputted signal exclusively to the gate of the first transistor when the read in mode signal is received and is configured to transmit the outputted signal exclusively to the gate of the second transistor when the display mode signal is received.
5 more elements
A semiconductor device configured to selectively drive either of a sensor and a light emitting element from a shift register output, comprising:
- a pixel portion comprising a pixel, the pixel comprising the sensor, a sensor selection transistor electrically connected to the sensor, the light emitting element, and a light emitting element selection transistor electrically connected to the light emitting element;
- a selection signal line drive circuit comprising a shift register configured to output signal;
- a selection output switching circuit electrically connected to the shift register to receive the outputted signal, and
- a mode control wiring electrically connected to the selection output switching circuit, the selection output switching circuit being configured to receive from the mode control wiring a read in mode signal and a display mode signal,
- wherein a gate of the sensor selection transistor and a gate of the light emitting element selection transistor are both electrically connected to the selection output switching circuit, and
- wherein the selection output switching circuit is configured to transmit the outputted signal exclusively to the gate of the sensor selection transistor when the read mode signal is received and is configured to transmit the outputted signal exclusively to the gate of the light emitting selection transistor when the display mode signal is received.
3 more elements
A semiconductor device configured to selectively drive either of a sensor and a liquid crystal element from a shift register output, comprising:
- a pixel portion comprising a pixel, the pixel comprising the sensor, a sensor selection transistor electrically connected to the sensor, the liquid crystal element, and a liquid crystal element selection transistor electrically connected to the liquid crystal element;
- a selection signal line drive circuit comprising a shift register configured to output a signal;
- a selection output switching circuit electrically connected to the shift register to receive the outputted signal, and
- a mode control wiring electrically connected to the selection output switching circuit, the selection output switching circuit being configured to receive from the mode control wiring a read in mode signal and a display mode signal,
- wherein a gate of the sensor selection transistor and a gate of the liquid crystal element selection transistor are both electrically connected to the selection output switching circuit, and
- wherein the selection output switching circuit is configured to transmit the outputted signal exclusively to the gate of the sensor selection transistor when the read in mode signal is received and is configured to transmit the outputted signal exclusively to the gate of the liquid crystal element selection transistor when the display ,ode signal is received.
3 more elements
Dependencies are inferred from the claim text.