Automobile window glass

• US 9,625,685 B2
• Filed: 07/12/2013
• Issued: 04/18/2017
• Est. Priority Date: 01/14/2011
• Status: Active Grant

• Current Assignee: AGC, Inc.
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Ogawa, Masanobu, Ooe, Junzo, Sawaya, Takuma, Kitagawa, Takashi
• Primary Examiner(s): ROMAIN, PINEL E
• Application Number:
  US13/941,339
• Publication Number:
  US 20130301118A1
• Time in Patent Office: 1,376 Days
• Field of Search: 296 841, 296 9619
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10183 being not continuous, e.g. in edge regions
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• 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: C03C 17/34 with at least two coatings having different compositions C03C17/44 takes precedence
• CPC Class Codes: C03C 2218/365 Coating different sides of a glass substrate
• CPC Class Codes: G02B 13/14 for use with infrared or ultraviolet radiation G02B13/008, G02B13/16 take precedence
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/282 reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
• CPC Class Codes: H01Q 1/1271 for mounting on windscreens
• CPC Class Codes: H01Q 1/526 Electromagnetic shields

Abstract

The present invention relates to a window glass for a vehicle, attached to a body flange of the vehicle at a circumferential edge portion thereof, including: an infrared ray shielding portion which reflects or absorbs infrared rays on a large part of the window; and electromagnetic wave transmitting portions having a substantially rectangular shape, which transmit at least a predetermined electromagnetic wave, at each of lower end portions on both sides in a width direction of the vehicle.

Claims

1. A window glass for a vehicle, attached to a body flange of the vehicle at a circumferential edge portion thereof, comprising:

an infrared ray shielding portion which reflects or absorbs infrared rays on a large part of the window; and

electromagnetic wave transmitting portions having a substantially rectangular shape, which transmit at least a predetermined electromagnetic wave, at each of lower end portions on both sides in a width direction of the vehicle, wherein the electromagnetic wave transmitting portions are frequency selective surfaces in which a thermal wave reflective film is formed in a mesh-shape.

2. The window glass for a vehicle according to claim 1, wherein when a wavelength in the air at a central frequency of a frequency band of the predetermined electromagnetic wave to be transmitted is λ

0, a shortening coefficient of wavelength in a glass is k (provided that, k=0.64), and a wavelength on a glass is λ

g=λ

0·

k,

an upper edge of the electromagnetic wave transmitting portion is spaced 2λ

g

or more away from the body flange which is positioned at lower side thereof, and

an inner lateral edge of the electromagnetic wave transmitting portion is spaced 3.6λ

g or more away from the body flange which is positioned sideways thereof.

3. The window glass for a vehicle according to claim 1, wherein an upper edge of the electromagnetic transmitting portion is spaced 170 mm or more away from the body flange which is positioned at lower side thereof, and

an inner lateral edge of the electromagnetic wave transmitting portion is spaced 300 mm or more away from the body flange which is positioned sideways thereof.

6. The window glass for a vehicle according to claim 1, wherein the infrared ray shielding portion is positioned inwards from a tip portion of the body flange.

8. The window glass for a vehicle according to claim 1, wherein the window glass for the vehicle is a windshield which is placed at the front side of a vehicle.

4. A window glass for a vehicle, attached to a body flange of the vehicle at a circumferential edge portion thereof, comprising:

an infrared ray shielding portion which reflects or absorbs infrared rays on a large part of the window; and

electromagnetic wave transmitting portions having a substantially rectangular shape, which transmit at least a predetermined electromagnetic wave, at each of lower end portions on both sides in a width direction of the vehicle, wherein

an electromagnetic wave transmitting connecting portion connects the electromagnetic wave transmitting portions on both sides in a width direction of the vehicle at a lower end portion of the window glass for a vehicle, and where the infrared ray shielding portion is not formed, and

wherein a distance between an upper edge of the electromagnetic wave transmitting connecting portion and the body flange which is positioned at lower side thereof is smaller than a distance between the upper edge of the electromagnetic wave transmitting portion and the body flange which is positioned at lower side thereof.

5. The window glass for a vehicle according to claim 4, wherein the upper edge of the electromagnetic wave transmitting connecting portion is spaced 95 mm or more away from the body flange which is positioned at lower side thereof.

7. The window glass for a vehicle according to claim 4, wherein the electromagnetic wave transmitting portion is a frequency selective surface in which a thermal wave reflective film is formed in a mesh-shape.

9. The window glass for a vehicle according to claim 4, wherein when a wavelength in the air at a central frequency of a frequency band of the predetermined electromagnetic wave to be transmitted is λ

0, a shortening coefficient of wavelength in a glass is k (provided that, k=0.64), and a wavelength on a glass is λ

g=λ

0·

k,

an upper edge of the electromagnetic wave transmitting portion is spaced 2λ

g

or more away from the body flange which is positioned at lower side thereof, and

an inner lateral edge of the electromagnetic wave transmitting portion is spaced 3.6λ

g or more away from the body flange which is positioned sideways thereof.

10. The window glass for a vehicle according to claim 4, wherein an upper edge of the electromagnetic transmitting portion is spaced 170 mm or more away from the body flange which is positioned at lower side thereof, and

an inner lateral edge of the electromagnetic wave transmitting portion is spaced 300 mm or more away from the body flange which is positioned sideways thereof.

11. The window glass for a vehicle according to claim 4, wherein the infrared ray shielding portion is positioned inwards from a tip portion of the body flange.

12. The window glass for a vehicle according to claim 4, wherein the electromagnetic wave transmitting portion is a frequency selective surface in which a thermal wave reflective film is formed in a mesh-shape.

13. The window glass for a vehicle according to claim 4, wherein the window glass for the vehicle is a windshield which is placed at the front side of a vehicle.