# US 11,027,643 B2 · Mobile unit and system for mobile unit

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- Number: US 11,027,643 B2
- Document ID: US11027643B2
- Status: Granted
- Kind: B2
- Application number: 16/816,885
- Filed: 2020-03-12
- Published: 2020-07-09
- Granted: 2021-06-08
- Earliest claimed: 2016-04-01
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Hajime Kimura; Kentaro Hayashi
- Web page: https://patentgrep.com/patent/US11027643B2

## CPC

- B60Q 1/085: {due to special conditions, e.g. adverse weather, type of road, badly illuminated road signs or potential dangers (B60Q1/10, B60Q1/12, B60Q1/1423 take precedence)}
- B60J 3/04: adjustable in transparency
- B60Q 1/076: by electrical means {including means to transmit the movements, e.g. shafts or joints}
- G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)}
- G06V 10/955: {using specific electronic processors}
- G06V 20/584: {of vehicle lights or traffic lights}
- G08G 1/166: {for active traffic, e.g. moving vehicles, pedestrians, bikes}
- H10D 86/423: {comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO}
- H10D 86/60: wherein the TFTs are in active matrices
- H10F 39/014: {of CMOS image sensors}
- H10F 39/199: {Back-illuminated image sensors}
- H10F 39/80377: {characterised by the channel of the transistor, e.g. channel having a doping gradient}
- H10F 39/8057: {Optical shielding}
- H10F 39/809: {of hybrid image sensors}
- B60Q 2300/056: Special anti-blinding beams, e.g. a standard beam is chopped or moved in order not to blind
- G02F 1/1313: {specially adapted for a particular application}
- H10F 39/18: Complementary metal-oxide-semiconductor [CMOS] image sensors; Photodiode array image sensors
- H10F 39/8053: {Colour filters}
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60J: WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES (fastening, suspending, closing, or opening of such devices E05)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G08G: TRAFFIC CONTROL SYSTEMS (guiding railway traffic, ensuring the safety of railway traffic B61L; arrangement of road signs or traffic signals E01F9/00; radar or analogous systems, sonar systems, lidar systems specially adapted for traffic control G01S13/91, G01S15/88, G01S17/88; {radar or analogous systems, sonar systems, lidar systems specially adapted for anti-collision purposes G01S13/93, G01S15/93, G01S17/93})
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

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.

## Claims

### Claim 1

A mobile unit comprising:
a first sensor;
a second sensor; 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 a region that is to be irradiated with a beam by an oncoming car, and
wherein a light transmittance of the window portion is configured to be decreased on the basis of outputs of the first sensor and the second sensor.

### Claim 2 (depends on 1)

The mobile unit according to claim 1,
wherein the first sensor is positioned inside the mobile unit, and
wherein the second sensor is positioned outside the mobile unit.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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.

### Claim 5

A mobile unit comprising:
a first sensor;
a second sensor;
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 arithmetic circuit is configured to output a third signal to the window portion in accordance with the first signal and the second signal,
wherein the first signal comprises data on a position of eyes of a driver,
wherein the second signal comprises data on a region that is to be irradiated with a beam by an oncoming car,
wherein the third signal comprises data on a light transmittance of the window portion, and
wherein the light transmittance of the window portion is configured to be decreased on the basis of the third signal.

### Claim 6 (depends on 5)

The mobile unit according to claim 5,
wherein the first sensor is positioned inside the mobile unit, and
wherein the second sensor is positioned outside the mobile unit.

### Claim 7 (depends on 5)

The mobile unit according to claim 5,
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.

### Claim 8 (depends on 5)

The mobile unit according to claim 5,
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.