Vehicle windshield and vehicle component using same

Patent metadata

Field	Value
Publication number	US-11065943-B2
Application number	US-201916666715-A
Country	US
Kind code	B2
Filing date	Oct 29, 2019
Priority date	Oct 9, 2015
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

Provided are a vehicle windshield equipped with a transparent film at a visual field area, where a negative effect on a driving visibility due to a boundary line between a forming area and a non-forming area of the transparent film is improved, and a vehicle component having the vehicle windshield. The vehicle windshield includes: a window plate; and a transparent film provided at a surface on a vehicle-interior side of the window plate, wherein the vehicle windshield includes a first area where the transparent film is not provided and a second area where the transparent film is provided, at a central area when viewed from a front side, and a boundary between the first area and the second area has no perspective distortion and is constituted by a boundary line having line width visually recognized by scattering of irradiated light of 10 μm to 200 μm.

First claim

What is claimed is:

1. A vehicle windshield, comprising:
a window plate;
a black ceramic layer which is a band-shaped layer formed at a whole of a peripheral part of the window plate, the black ceramic layer having a wide portion at a center part on an upper side of the window plate, a sensor light transmission area being provided in the wide portion such that the sensor light transmission area is surrounded by the black ceramic layer, and
a transparent film provided in an island shape in the sensor light transmission area at a surface on a vehicle-interior side of the window plate,
wherein a boundary between an area in which the transparent film is formed and an area in which the transparent film is not formed has no perspective distortion and is constituted by a boundary line having a line width visually recognized by scattering of irradiated light being 10 μm to 200 μm, and
wherein presence or non-presence of the perspective distortion is determined by:
setting a test plate A and the vehicle windshield, wherein the test plate A has a grid pattern with an interval of 10 mm formed on a white background by 0.7 mm width black lines in which each black line forms an angle of 45 degrees with respect to a lower side of the test plate A, such that a surface of the test plate A on which the grid pattern is formed and a surface of the vehicle windshield on a side where the transparent film is not formed are in parallel with each other with a distance of 20 mm;
photographing the surface of the test plate A on which the grid pattern is formed through the vehicle windshield with a camera provided at a distance of 150 mm from a surface of the vehicle windshield on a side where the transparent film is formed such that the boundary line between the coating area and the non-coating area is located approximately at a center in a photographing area; and
determining that the perspective distortion is present when deformation or discontinuity is visually recognized in the grid pattern, and the perspective distortion is not present when neither the deformation nor the discontinuity is visually recognized in the grid pattern.

2. The vehicle windshield according to claim 1 , wherein a gap having a size of over 1 mm and less than 30 mm exists between the black ceramic layer and the transparent film.

3. The vehicle windshield according to claim 1 , wherein the transparent film has a stacked structure comprising three layers or more.

4. The vehicle windshield according to claim 1 , wherein each of the sensor light transmission area and the transparent film has a polygonal shape when viewed from a front side.

5. The vehicle windshield according to claim 1 , wherein a film thickness t of the transparent film is approximately constant in a vicinity of the boundary line.

6. The vehicle windshield according to claim 1 , wherein an end face of the transparent film is approximately perpendicular to a main surface of the window plate.

7. The vehicle windshield according to claim 1 , wherein formula:
100%−a minimum thickness ratio (%)≤5%,

is satisfied, wherein the minimum thickness ratio is a ratio of a minimum thickness of the transparent film within an area from an end face of the transparent film to 1 mm toward inside, to a maximum thickness of the transparent film within the area.

8. The vehicle windshield according to claim 7 , wherein formula:
100%−a minimum thickness ratio (%)≤2%,

is satisfied.

9. The vehicle windshield according to claim 7 , wherein formula:
100%−a minimum thickness ratio (%)≤1%,

is satisfied.

10. The vehicle windshield according to claim 2 , wherein the transparent film has a stacked structure comprising three layers or more.

11. The vehicle windshield according to claim 10 , wherein each of the sensor light transmission area and the transparent film has a polygonal shape when viewed from a front side.

12. The vehicle windshield according to claim 11 , wherein a film thickness t of the transparent film is approximately constant in a vicinity of the boundary line.

13. The vehicle windshield according to claim 12 , wherein an end face of the transparent film is approximately perpendicular to a main surface of the window plate.

14. The vehicle windshield according to claim 13 , wherein formula:
100%−a minimum thickness ratio (%)≤5%,

is satisfied, wherein the minimum thickness ratio is a ratio of a minimum thickness of the transparent film within an area from an end face of the transparent film to 1 mm toward inside, to a maximum thickness of the transparent film within the area.

15. The vehicle windshield according to claim 14 , wherein formula:
100%−a minimum thickness ratio (%)≤2%,

is satisfied.

16. The vehicle windshield according to claim 14 , wherein formula:
100%−a minimum thickness ratio (%)≤1%,

is satisfied.

Assignees

• Agc Inc

Inventors

• Irie Tetsuji
• Sato Nana
• Okawa Jun
• Saito Hideyuki
• Nagata Akio

Classifications

• B32B2307/412

  Transparent · CPC title

• B32B17/10128

  Treatment of at least one glass sheet · CPC title

• B32B17/10165

  Functional features of the laminated safety glass or glazing · CPC title

• B32B17/10036

  comprising two outer glass sheets · CPC title

• B60J1/002 Primary

  with means for clear vision, e.g. anti-frost or defog panes, rain shields (window heating in H05B3/84, H05B3/86) · CPC title