Mobile unit and system for mobile unit
A mobile unit and a system for a mobile unit which can judge whether an oncoming car is emitting a high beam are provided. A mobile unit and a system for a mobile unit which include a first and a second sensors, a memory circuit, an arithmetic circuit, and a window portion. The first sensor is configured to sense the position of the eyes of a driver who is riding in the mobile unit. The second sensor is configured to sense whether an oncoming car is existing, whether the oncoming car is emitting a high beam, and a region that is to be irradiated with the high beam. The memory circuit is configured to store an irradiation distance of a high beam and a decrease rate of light transmittance of the window portion. The arithmetic circuit is configured to output, to the window portion, data on a region of the window portion in which the light transmittance is to be changed, on the basis of data sensed by the first sensor and the second sensor and data stored in the memory circuit. The window portion is configured to locally decrease the light transmittance on the basis of the data output from the arithmetic circuit.
1. A mobile unit comprising:
a first sensor;
a second sensor;
a first circuit;
an arithmetic circuit; and
a window portion,
wherein the first sensor is configured to sense a position of eyes of a driver,
wherein the second sensor is configured to sense whether an oncoming car exists,
wherein the second sensor is configured to sense whether the oncoming car emits a high beam,
wherein the second sensor is configured to sense a region that is to be irradiated with the high beam emitted by the oncoming car,
wherein the first circuit is configured to store an irradiation distance of a high beam,
wherein the first circuit is configured to store a decrease rate of light transmittance of the window portion,
wherein the arithmetic circuit is configured to output, to the window portion, data on a region of the window portion in which the light transmittance is to be changed, on the basis of data sensed by the first sensor and the second sensor and data stored in the first circuit, and
wherein the window portion is configured to locally decrease the light transmittance on the basis of the data, which is output from the arithmetic circuit, on a region of the window portion in which the light transmittance is to be changed.
2. A mobile unit comprising:
a first sensor;
a second sensor;
a first circuit;
an arithmetic circuit; and
a window portion,
wherein the first sensor is configured to output a first signal to the arithmetic circuit,
wherein the second sensor is configured to output a second signal to the arithmetic circuit,
wherein the second sensor is configured to output a third signal to the arithmetic circuit,
wherein the second sensor is configured to output a fourth signal to the arithmetic circuit,
wherein the first circuit is configured to output a fifth signal to the arithmetic circuit,
wherein the first circuit is configured to output a sixth signal to the arithmetic circuit,
wherein the arithmetic circuit is configured to output a seventh signal to the window portion in accordance with the first to sixth signals,
wherein the window portion is configured to locally decrease light transmittance in accordance with the seventh signal,
wherein the first signal comprises data on a position of eyes of a driver,
wherein the second signal comprises data on whether an oncoming car exists,
wherein the third signal comprises data on whether the oncoming car emits a high beam,
wherein the fourth signal comprises data on a region that is to be irradiated with the high beam emitted by the oncoming car,
wherein the fifth signal comprises data on an irradiation distance of a high beam,
wherein the sixth signal comprises data on a decrease rate of the light transmittance, and
wherein the seventh signal comprises data on a region of the window portion in which the light transmittance is to be changed.
3. The mobile unit according to claim 1 ,
wherein the first sensor is provided inside the mobile unit, and
wherein the second sensor is provided outside the mobile unit.
4. The mobile unit according to claim 1 ,
wherein a dynamic range of the second sensor is higher than a dynamic range of the first sensor, and
wherein a frame frequency of the second sensor is higher than a frame frequency of the first sensor.
5. The mobile unit according to claim 1 ,
wherein the first sensor comprises a first imaging element,
wherein the second sensor comprises a second imaging element,
wherein the first imaging element is configured to be operated by a rolling shutter method, and
wherein the second imaging element is configured to be operated by a global shutter method.
6. The mobile unit according to claim 1 ,
wherein the second sensor comprises a pixel comprising a photoelectric conversion element, a first transistor, a second transistor, a third transistor, and a fourth transistor,
wherein one terminal of the photoelectric conversion element is electrically connected to one of a source and a drain of the first transistor,
wherein the other of the source and the drain of the first transistor is electrically connected to one of a source and a drain of the second transistor,
wherein the one of the source and the drain of the second transistor is electrically connected to a gate of the third transistor,
wherein one of a source and a drain of the third transistor is electrically connected to one of a source and a drain of the fourth transistor,
wherein a channel formation region of each of the first transistor and the second transistor comprises an oxide semiconductor, and
wherein the oxide semiconductor comprises In and Zn.
7. The mobile unit according to claim 2 ,
wherein the first sensor is provided inside the mobile unit, and
wherein the second sensor is provided outside the mobile unit.
8. The mobile unit according to claim 2 ,
wherein a dynamic range of the second sensor is higher than a dynamic range of the first sensor, and
wherein a frame frequency of the second sensor is higher than a frame frequency of the first sensor.
9. The mobile unit according to claim 2 ,
wherein the first sensor comprises a first imaging element,
wherein the second sensor comprises a second imaging element,
wherein the first imaging element is configured to be operated by a rolling shutter method, and
wherein the second imaging element is configured to be operated by a global shutter method.
10. The mobile unit according to claim 2 ,
wherein the second sensor comprises a pixel comprising a photoelectric conversion element, a first transistor, a second transistor, a third transistor, and a fourth transistor,
wherein one terminal of the photoelectric conversion element is electrically connected to one of a source and a drain of the first transistor,
wherein the other of the source and the drain of the first transistor is electrically connected to one of a source and a drain of the second transistor,
wherein the one of the source and the drain of the second transistor is electrically connected to a gate of the third transistor,
wherein one of a source and a drain of the third transistor is electrically connected to one of a source and a drain of the fourth transistor,
wherein a channel formation region of each of the first transistor and the second transistor comprises an oxide semiconductor, and
wherein the oxide semiconductor comprises In and Zn.