# US 12,222,082 B2 · Vehicle lamp having radar with concealing part and electromagnetic absorbing cover

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- Number: US 12,222,082 B2
- Document ID: US12222082B2
- Status: Granted
- Kind: B2
- Application number: 18/530,762
- Filed: 2023-12-06
- Published: 2024-04-04
- Granted: 2025-02-11
- Earliest claimed: 2019-07-18
- Assignees: Koito Manufacturing Co., Ltd.
- Applicants: Koito Manufacturing Co., Ltd.
- Inventors: Yuta Maruyama; Yoshihiro Katsurada; Yuichi Watano; Osamu Kuboyama
- Web page: https://patentgrep.com/patent/US12222082B2

## CPC

- F21S 45/10: Protection of lighting devices (cooling of lighting devices F21S45/40; waterproofing of lighting devices F21S45/50)
- B60Q 1/0023: {the element being a sensor, e.g. distance sensor, camera}
- B60Q 1/04: the devices being headlights
- F21S 41/28: {Cover glass}
- F21S 41/2805: {Cover glass}
- G01S 7/027: {Constructional details of housings, e.g. form, type, material or ruggedness}
- G01S 13/931: of land vehicles
- G01S 2013/93271: {in the front of the vehicles}
- G01S 2013/93277: {in the lights}
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES

## Abstract

A right-side vehicle lamp (2R) comprises: a lamp housing (14); a lamp cover (12) that covers an opening in the lamp housing (14); a low-beam illumination unit (3) positioned inside a lamp chamber (S) formed from the lamp housing (14) and the lamp cover (12); radar (5) configured so as to emit radio waves outside the vehicle, thereby acquiring radar data; and a shielding part (6) positioned so as to face the radar (5) so as to shield the radar (5) from the outside of the vehicle, the shielding part (6) being configured so as to transmit the radio waves emitted from the radar (5). The shielding part (6) is formed integrally with the lamp cover (12). The boundary (B) between the shielding part (6) and the lamp cover (12) is positioned outside the field of view (Fv) of the radar (5).

## Claims

### Claim 1

A vehicle lamp comprising:
a lamp housing;
a lamp cover covering an opening of the lamp housing;
an illumination unit disposed in a lamp chamber formed by the lamp housing and the lamp cover;
a radar configured to acquire radar data indicating surroundings of a vehicle by emitting an electromagnetic wave outside the vehicle;
a concealing part that faces the radar to conceal the radar from the outside of the vehicle and is configured to let the electromagnetic wave emitted from the radar through;
an electromagnetic-wave absorption cover surrounding an antenna part of the radar to absorb the electromagnetic wave emitted from the radar, and
a support member that is fixed to the lamp housing and is configured to support the radar, wherein
the electromagnetic-wave absorption cover is fixed to the support member.

### Claim 2 (depends on 1)

The vehicle lamp according to claim 1, wherein
the electromagnetic-wave absorption cover is out of a field of view of the radar.

### Claim 3 (depends on 1)

The vehicle lamp according to claim 1, wherein
the electromagnetic-wave absorption cover is between the concealing part and the radar to be concealed from the outside of the vehicle by the concealing part.

### Claim 4 (depends on 1)

The vehicle lamp according to claim 1, wherein
the concealing part is formed integrally with the lamp cover.

### Claim 5 (depends on 1)

The vehicle lamp according to claim 1, wherein
a thickness t of the concealing part follows the following equation:
t=λ/2εr1/2×n,
where λ is a wavelength of the electromagnetic wave emitted from the radar, εr is a relative permittivity of the concealing part, and n is a positive integer.

### Claim 6 (depends on 1)

The vehicle lamp according to claim 1, wherein
a distance between the concealing part and the radar is not smaller than 20 mm and not greater than 100 mm.

### Claim 7 (depends on 1)

The vehicle lamp according to claim 1, wherein the electromagnetic-wave absorption cover is supported only by the support member.