Vehicle windshield and article for vehicle
A vehicle windshield includes a window plate and an anti-fogging film provided on an interior side surface of the window plate, with a first region and a second region within a see-through region. The anti-fogging film is not on the first region but on the second region. The first region includes a belt-like region in an upper portion of the see-through region. The second region is a region that includes at least a test area B and that includes a continuous projection portion provided on an upper side. The anti-fogging film in the second region has a minimum film thickness of no less than 5 μm. At least a boundary between the first region and the second region excluding the projection portion has no perspective distortion and is formed by a boundary line having a linewidth of 10-200 μm that is visually recognized by scattering of incoming light.
1. A vehicle windshield, comprising:
a window plate; and
an anti-fogging film provided on a surface of the window plate, the surface facing a vehicle interior, wherein
the vehicle windshield includes a first region and a second region within a see-through region, the anti-fogging film not being provided in the first region as viewed in a front view, the anti-fogging film being provided in the second region as viewed in the front view,
the first region includes a belt-like region in an upper portion of the see-through region,
the second region is a region that includes at least a test area B defined in JIS R3212 (1998) and that includes a continuous projection portion provided on an upper side, the anti-fogging film in the second region having a minimum film thickness of no less than 5 μm, and
at least a boundary between the first region and the second region excluding the projection portion has no perspective distortion and is formed by a boundary line having a linewidth of 10-200 μm, the boundary line being visually recognized by scattering of incoming light.
2. The vehicle windshield according to claim 1 , wherein
the projection portion of the second region is used for an optical device disposed on a vehicle interior side to transmit a signal to a vehicle exterior side of the vehicle windshield through the projection portion and/or to receive a signal from the vehicle exterior side of the vehicle windshield through the projection portion, and
a vicinity of an outer side of the projection portion of the second region is used as an attachment region where the optical device is attached, the vicinity being in the first region.
3. The vehicle windshield according to claim 1 , wherein the anti-fogging film has a film thickness that increases toward a lower side of the vehicle windshield.
4. The vehicle windshield according to claim 1 , wherein the anti-fogging film has a film thickness that increases toward an upper side of the vehicle windshield.
5. The vehicle windshield according to claim 1 , wherein an upper side of the second region has a shape in which only the projection portion projects higher upward than a portion other than the projection portion.
6. The vehicle windshield according to claim 1 , wherein
an upper side of the second region has a shape including a recess portion that is recessed downward,
the projection portion is so formed as to project upward from a bottom portion of the recess portion, and
a vertex of the projection portion is at a position level with a base portion of the recess portion in the upper side.
7. The vehicle windshield according to claim 1 , wherein
an upper side of the second region has a shape including a recess portion that is recessed downward,
the projection portion is so formed as to project upward from a bottom portion of the recess portion, and
a vertex of the projection portion is located at a position lower than a base portion of the recess portion in the upper side.
8. The vehicle windshield according to claim 1 , wherein
an upper side of the second region has a shape including a recess portion that is recessed downward,
the projection portion is so formed as to project upward from a bottom portion of the recess portion, and
a vertex of the projection portion is located at a position higher than a base portion of the recess portion in the upper side.
9. The vehicle windshield according to claim 1 , wherein the window plate includes a first light-transmissive substrate, a second light-transmissive substrate opposing the first light-transmissive substrate, and an intermediate film sandwiched by the first light-transmissive substrate and the second light-transmissive substrate.
10. The vehicle windshield according to claim 1 , wherein the window plate includes a shading region in a peripheral portion.
11. The vehicle windshield according to claim 10 , wherein the shading region is constituted by a black ceramic layer formed on a surface of the window plate, the surface being other than a surface facing a vehicle interior.
12. The vehicle windshield according to claim 1 , wherein the projection portion is rectangular.
13. The vehicle windshield according to claim 2 , wherein the attachment region has a width of no less than 3 mm nor more than 40 mm.
14. An article for a vehicle, the article comprising:
the vehicle windshield according to claim 1 ; and
an optical device attached on a vehicle interior side of the vehicle windshield within the first region and in the vicinity of an outer side of the projection portion of the second region, the optical device being configured to transmit a signal to a vehicle exterior side of the vehicle windshield through the projection portion of the second region and/or to receive a signal from the vehicle exterior side of the vehicle windshield through the projection portion of the second region.