WINDSHIELD INCLUDING VEHICLE-MOUNTED RADAR

• US 20170274832A1
• Filed: 03/23/2017
• Published: 09/28/2017
• Est. Priority Date: 03/24/2016
• Status: Abandoned Application

• Current Assignee: Nidec Corporation
• Original Assignee: Nidec Elesys Corporation (Nidec Corporation)
• Inventors: ABE, Akira
• Application Number:
  US15/466,928
• Publication Number:
  US 20170274832A1
• Time in Patent Office: Days
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B60J 1/02 arranged at the vehicle front , e.g. structure of the glazing, mounting of the glazing on windscreen mounted antenna wire H01Q1/1271
• CPC Class Codes: B60R 1/04 mounted inside vehicle B60R1/025, B60R1/08 take precedence
• CPC Class Codes: B60R 11/02 for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
• CPC Class Codes: B60R 2011/0026 Windows, e.g. windscreen
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/93276 in the windshield area
• CPC Class Codes: G01S 7/024 using polarisation effects in waveguides H01P1/165; for aerials H01Q, e.g. H01Q15/22, H01Q15/24, H01Q19/195
• CPC Class Codes: G01S 7/025 involving the transmission of linearly polarised waves
• CPC Class Codes: H01Q 1/3233 particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
• CPC Class Codes: H01Q 13/02 Waveguide horns
• CPC Class Codes: H01Q 21/065 Patch antenna array

Abstract

A windshield includes a radar that detects an object around the radar with transmitted and received radio waves in a millimeter band and a radar window on which at least a portion of the radio waves is incident. The windshield includes a windshield main body including a single glass layer or at least one glass layer on which a resin layer is laminated. Both of the windshield main body and the radar window are plate-shaped. An area of the radar window is smaller than an area of the windshield main body. A dielectric constant of the radar window is smaller than a dielectric constant of the glass layer. At least a portion of a side surface connecting an outer surface and an inner surface of the radar window is in contact with a side surface connecting an outer surface and an inner surface of the windshield main body.

Claims

1. A windshield comprising:

a vehicle-mounted radar that detects an object around the vehicle-mounted radar with transmitted and received radio waves in a millimeter band;

a radar window on which at least a portion of the radio waves is incident; and

a windshield main body including a single glass layer or at least one glass layer on which a resin layer is laminated;

wherein

both of the windshield main body and the radar window are plate-shaped;

an area of the radar window is smaller than an area of the windshield main body;

a dielectric constant of the radar window is smaller than a dielectric constant of the glass layer; and

at least a portion of a side surface connecting an outer surface and an inner surface of the radar window is in contact with a side surface connecting an outer surface and an inner surface of the windshield main body.

2. The windshield according to claim 1, wherein the outer surface of the radar window and the outer surface of the windshield main body define a single continuous surface.

3. The windshield according to claim 1, wherein

the windshield main body includes upper and lower edges extending in a lateral direction and left and right edges extending in an up-down direction and the lower edge is longer than the upper edge;

and

the radar window increases in width toward the lower edge from the upper edge of the windshield main body.

4. The windshield according to claim 2, wherein

the windshield main body includes an upper edge and a lower edge both extending in a lateral direction and a left edge and a right edge both extending in an up-down direction and lower sides of the upper edge and the lower edge are longer than upper sides of the upper edge and the lower edge;

and

the radar window increases in width toward the lower edge from the upper edge of the windshield main body.

5. The windshield according to claim 1, wherein

the side surface of the radar window includes a flange expanding along the outer surface or the inner surface of the windshield main body on an outer surface side or an inner surface side of the radar window;

and

the flange adheres to the outer surface or the inner surface of the windshield main body.

6. The windshield according to claim 2, wherein

the side surface of the radar window includes a flange expanding along the outer surface or the inner surface of the windshield main body on an outer surface side or an inner surface side of the radar window;

and

the flange adheres to the outer surface or the inner surface of the windshield main body.

7. The windshield according to claim 3, wherein

the side surface of the radar window includes a flange expanding along the outer surface or the inner surface of the windshield main body on an outer surface side or an inner surface side of the radar window;

and

the flange adheres to the outer surface or the inner surface of the windshield main body.

8. The windshield according to claim 4, wherein

the side surface of the radar window includes a flange expanding along the outer surface or the inner surface of the windshield main body on an outer surface side or an inner surface side of the radar window;

and

the flange adheres to the outer surface or the inner surface of the windshield main body.

9. A radar system that detects an object around the radar system with transmitted and received radio waves in a millimeter band, the radar system comprising:

a vehicle-mounted radar; and

a windshield disposed on a side where the radio waves are radiated by the radar;

wherein

the windshield includes a windshield main body including a single glass layer or at least one glass layer on which a resin layer is laminated;

the windshield includes a radar window on which at least a portion of the radio waves is incident;

both of the windshield main body and the radar window are plate-shaped;

an area of the radar window is smaller than an area of the windshield main body;

a dielectric constant of the radar window is smaller than a dielectric constant of the glass layer; and

at least a portion of a side surface connecting an outer surface and an inner surface of the radar window is in contact with a side surface connecting an outer surface and an inner surface of the windshield main body.

10. The radar system according to claim 9, wherein

the vehicle-mounted radar includes an antenna that transmits and receives the radio waves;

and

at least a portion of the radar window is connected to the antenna.

11. The radar system according to claim 10, wherein a lower edge of an aperture of the antenna is located farther on a lower side than the inner surface of the windshield main body.

12. The radar system according to claim 10, wherein an aperture surface of the antenna expands along the inner surface of the windshield main body.

13. The radar system according to claim 9, wherein a vertically polarized wave component is smaller than a horizontally polarized wave component in the radio waves.

14. The radar system according to claim 10, wherein a vertically polarized wave component is smaller than a horizontally polarized wave component in the radio waves.

15. The radar system according to claim 11, wherein a vertically polarized wave component is smaller than a horizontally polarized wave component in the radio waves.

16. The radar system according to claim 12, wherein a vertically polarized wave component is smaller than a horizontally polarized wave component in the radio waves.

17. The radar system according to claim 9, wherein the side surface of the radar window includes a flange expanding along the outer surface or the inner surface of the windshield main body on an outer surface side or an inner surface side of the radar window;

and

the flange adheres to the outer surface or the inner surface of the windshield main body.

18. A vehicle mounted with the radar system according to claim 9, wherein

the vehicle includes a rear view mirror in a vehicle interior;

and

the vehicle-mounted radar is disposed between the radar window and the rear view mirror.

19. The vehicle according to claim 9, wherein an angle defined by the windshield and a traveling direction of the radio waves is less than 40°

.