Laminated glass for vehicle
AssigneeAsahi Glass Company, Limited
InventorsYuuji Masaki, Kazuyuki Kurihara
Life of this patent
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Abstract
The present invention provides, in a HUD device employing a high-functional windshield such as a sound-insulation glass having a multi-layer interlayer, a windshield for a vehicle which does not produce double images and has excellent visibility without deteriorating functionality of the windshield. In a laminated glass having a multi-layer interlayer having a wedge-shaped thickness profile sandwiched by glass sheets, the multi-layer interlayer has layers having different hardness, the thickness of first resin layers having high hardness is at least 0.3 mm in a region within 400 nm from a lower side, which prevents the generation of optical distortion of the laminated glass and efficiently prevents double display images.
Claims20
A laminated glass for a vehicle, comprising:
- two curved glass sheets opposing each other;
- and
- an interlayer interposed between the glass sheets with the glass sheets and the interlayer being laminated together,
- wherein the interlayer is a multilayer film comprising at least one first resin layer and at least one second resin layer having lower hardness than that of the at least one first resin layer,
- wherein the interlayer has a wedge-shaped thickness profile in which an upper side of the interlayer, when the laminated glass is in a position attached to a vehicle, is thicker than a lower side of the interlayer,
- wherein a thickness of the at least one first resin layer is at least 0.3 mm in an area to be used for a heads up display (HUD) within 400 mm from an edge of the lower side of the interlayer such that embossing on a surface of the at least one first resin layer is eliminated from the area to be used for a HUD.
A laminated glass for a vehicle, comprising:
- two curved glass sheets opposing each other;
- an interlayer made of a multi-layer organic resin and interposed between the glass sheets with the glass sheets and the interlayer being laminated together,
- wherein the interlayer is a multilayer film comprising at least one first resin layer and at least one second resin layer having lower hardness than that of the at least one first resin layer,
- wherein the interlayer has a wedge-shaped thickness profile in which an upper side of the interlayer, when the laminated glass is in a position attached to a vehicle, is thicker than a lower side of the interlayer, and
- wherein a thickness of the at least first resin layer is at least 0.3 mm in an area to be used for a HUD within 400 mm from an edge of the lower side of the interlayer such that embossing on a surface of the at least one first resin layer is eliminated from the area to be used for a HUD;
- and
- IR cutoff fine particles dispersed in at least one of the first and second resin layers having the wedge-shaped thickness profile.
A head-up display device comprising:
- a light source for emitting light beam of display information;
- a glass sheet disposed so as to be opposed to the light source;
- and
- a display area formed on the glass sheet and configured to display the display information emitted from the light source, wherein the glass sheet is a laminated glass sheet comprising:
- two curved glass sheets opposing each other;
- and
- an interlayer interposed between the glass sheets and laminated together, wherein:
- the laminated glass has a wedge-shaped thickness profile in which an upper side of the laminated glass, when the laminated glass is attached to a vehicle, is thicker than a lower side of the laminated glass, and
- the interlayer comprises at least a first resin layer and a second resin layer having a hardness lower than that of the first resin layer, and a thickness of the first resin layer in the display area is at least 0.3 mm such that embossing on a surface of the first resin layer is eliminated from the display area.
Dependencies are inferred from the claim text.