EP-4742832-A1 - LAMINATED GLASS, DISPLAY AND VEHICLE

EP4742832A1EP 4742832 A1EP4742832 A1EP 4742832A1EP-4742832-A1

Abstract

A laminated glass, a display system, and a vehicle are provided in the present disclosure. The laminated glass includes an outer glass, an inner glass, an adhesive layer, a light-shielding layer, and a heating element. The outer glass and the inner glass are stacked. The outer glass has a first surface away from the inner glass and a second surface closer to the inner glass. The inner glass has a third surface closer to the outer glass and a fourth surface away from the outer glass. The adhesive layer is disposed between the outer glass and the inner glass, to bond the outer glass and the inner glass together. The light-shielding layer is disposed along an edge of the laminated glass, to form a light-transmitting region and a light-blocking region in the laminated glass. The light-blocking region has at least one first display region, and the at least one first display region is configured for reflecting a projection light ray emitted by a projection assembly to form a first primary image. The heating element is disposed between the outer glass and the inner glass, and the heating element is configured for generating heat when the heating element is energized. The laminated glass provided in the present disclosure allows the driver to sharply recognize projected information.

Inventors

CHEN, Bingjing
LIN, JIE
LI, WEIJUN

Assignees

Fuyao Glass Industry Group Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20240808

Claims (20)

A laminated glass, comprising: an outer glass and an inner glass that are stacked, wherein the outer glass has a first surface away from the inner glass and a second surface closer to the inner glass, and the inner glass has a third surface closer to the outer glass and a fourth surface away from the outer glass; an adhesive layer disposed between the outer glass and the inner glass, to bond the outer glass and the inner glass together; a light-shielding layer disposed along an edge of the laminated glass, to form a light-transmitting region and a light-blocking region in the laminated glass, wherein the light-blocking region has at least one first display region, and the at least one first display region is configured for reflecting a projection light ray emitted by a projection assembly to form a first primary image; and a heating element disposed between the outer glass and the inner glass, wherein the heating element is configured for generating heat when the heating element is energized.
The laminated glass of claim 1, wherein the light-shielding layer comprises a first light-shielding layer, the first light-shielding layer is disposed on the second surface, and the heating element is disposed between the adhesive layer and the second surface or between the adhesive layer and the third surface.
The laminated glass of claim 2, wherein the laminated glass further comprises an enhanced reflection coating, the enhanced reflection coating is disposed on the fourth surface, the enhanced reflection coating at least partially covers the at least one first display region, and the enhanced reflection coating is configured to increase a reflectivity of the at least one first display region for P-polarized light.
The laminated glass of any one of claims 1 to 3, wherein the light-transmitting region has at least one second display region, and the at least one second display region is configured for reflecting the projection light ray emitted by the projection assembly to form a second primary image.
The laminated glass of claim 4, wherein the laminated glass further comprises an enhanced reflection coating, the enhanced reflection coating at least partially covers the at least one second display region, and the enhanced reflection coating is configured to increase a reflectivity of the at least one second display region for P-polarized light.
The laminated glass of any one of claims 1 to 3, wherein the light-shielding layer comprises a second light-shielding layer, the second light-shielding layer is disposed on the third surface or the fourth surface, the second light-shielding layer at least covers the at least one first display region, and the heating element is disposed between the second light-shielding layer and the second surface.
The laminated glass of claim 6, wherein the light-transmitting region has at least one second display region, and the at least one second display region is configured for reflecting the projection light ray emitted by the projection assembly to form a second primary image; and the laminated glass further comprises an enhanced reflection coating, the enhanced reflection coating is disposed on the fourth surface, the enhanced reflection coating at least partially covers the at least one second display region, and the enhanced reflection coating is configured to increase a reflectivity of the at least one second display region for P-polarized light.
The laminated glass of claim 3, 5, or 7, wherein a reflectivity of the at least one first display region for the P-polarized light is greater than or equal to 10%; and/or the light-transmitting region has at least one second display region, and a reflectivity of the at least one second display region for the P-polarized light is greater than or equal to 10%.
The laminated glass of claim 1, wherein the heating element is a transparent conducting coating, and the transparent conducting coating comprises at least one of a metal layer, a metal-alloy layer, and a metal-oxide layer, wherein a material of the metal layer comprises one or more selected from the group consisting of gold (Au), silver (Ag), copper (Cu), aluminum (Al), and molybdenum (Mo), a material of the metal alloy layer comprises a metal alloy composed of silver and one or more selected from the group consisting of copper (Cu), gold (Au), palladium (Pd), tin (Sn), zinc (Zn), lead (Pb), and nickel (Ni), and a material of the metal oxide layer comprises one or more selected from the group consisting of indium tin oxide, fluorine-doped tin oxide, aluminum-doped tin oxide, gallium-doped tin oxide, boron-doped tin oxide, tin zinc oxide, and antimony-doped tin oxide.
The laminated glass of claim 1, wherein the heating element is an electric heating wire, wherein the electric heating wire is an enameled wire, wherein an inner layer of the enameled wire is made of a conductive material, and an outer layer of the enameled wire is made of an insulating material; or the electric heating wire is a tungsten wire; or the electric heating wire is a copper wire.
The laminated glass of claim 1, wherein the laminated glass further comprises a first bus-bar and a second bus-bar that are disposed between the outer glass and the inner glass, the first bus-bar and the second bus-bar are disposed in the light-blocking region, the first bus-bar and the second bus-bar are spaced apart from each other and are electrically connected to the heating element, and the heating element is configured for generating heat when the first bus-bar and the second bus-bar are energized.
The laminated glass of claim 11, wherein a minimum distance from the first bus-bar or the second bus-bar to an edge of a light-transmitting layer ranges from 6 mm to 30 mm.
The laminated glass of claim 1, wherein the adhesive layer is a thermoplastic polymer film with a wedge angle ranging from 0.1 mrad to 1.0 mrad.
A head-up display (HUD) system, comprising a projection assembly and the laminated glass of any one of claims 1 to 13, wherein the projection assembly is configured to emit the projection light ray onto the laminated glass.
The HUD system of claim 14, wherein the projection light ray comprises P-polarized light and/or S-polarized light.
The HUD system of claim 14, wherein the projection assembly comprises a first projection assembly and a second projection assembly, the light-blocking region of the laminated glass has the at least one first display region, the light-transmitting region of the laminated glass has at least one second display region, the first projection assembly is configured to project a light ray onto the at least one first display region to form the first primary image, and the second projection assembly is configured to project a light ray onto the at least one second display region to form a second primary image.
The HUD system of claim 14, wherein the projection light ray emitted by the projection assembly onto the laminated glass has an incident angle ranging from 40° to 80°.
The HUD system of claim 17, wherein the projection light ray emitted by the projection assembly onto the laminated glass has a horizontal field of view (HFOV) ranging from 0° to 50° in a horizontal direction.
The HUD system of claim 14, wherein a color difference δE*between an image formed by the projection light ray emitted by the projection assembly onto the laminated glass and the laminated glass satisfies δE*= ((δL*/2) 2 + (δa*) 2 + (δb*) 2 ) 0.5 , and δE*≥ 19.9, wherein δL*is a lightness difference between a color of the image formed by the projection light ray onto the laminated glass and a color of the laminated glass, δa* is a green-red chroma difference between the color of the image formed by the projection light ray onto the laminated glass and the color of the laminated glass, and δb*is a blue-yellow chroma difference between the color of the image formed by the projection light ray onto the laminated glass and the color of the laminated glass.
A vehicle, comprising a vehicle frame and the head-up display (HUD) system of any one of claims 14 to 19, wherein the HUD system is carried on the vehicle frame.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims priority to Chinese Patent Application No. 202310992926.2, filed August 08, 2023 and entitled "LAMINATED GLASS, DISPLAY SYSTEM, AND VEHICLE", the entire disclosure of which is hereby incorporated by reference. TECHNICAL FIELD This disclosure relates to the field of vehicle technology, in particular, to a laminated glass, a display system, and a vehicle. BACKGROUND In recent years, head-up display (HUD) systems have been widely applied in vehicles to reduce the need for drivers to look down at instrument panels for obtaining information, thereby improving safety of driving. An HUD in a vehicle is composed of a front windshield and a projection assembly. When the projection assembly emits a projection light ray onto the front windshield, the drivers are able to see projected information. However, in the related art, during inclement weather such as rain or snow, the windshield is prone to being covered by ice, snow, or fog, which can prevent the driver from sharply recognizing the projected information from the HUD. Additionally, simply mounting a heating element on the windshield may cause multiple reflections of the projection light ray, leading to ghosting of an HUD projected image and further hindering the ability of the driver to sharply recognize the projected information from the HUD. SUMMARY A laminated glass, a display system, and a vehicle that enable drivers to sharply recognize projected information are provided in the present disclosure. In a first aspect, a laminated glass is provided in the present disclosure. The laminated glass includes an outer glass, an inner glass, an adhesive layer, a light-shielding layer, and a heating element. The outer glass and the inner glass are stacked. The outer glass has a first surface away from the inner glass and a second surface closer to the inner glass. The inner glass has a third surface closer to the outer glass and a fourth surface away from the outer glass. The adhesive layer is disposed between the outer glass and the inner glass, to bond the outer glass and the inner glass together. The light-shielding layer is disposed along an edge of the laminated glass, to form a light-transmitting region and a light-blocking region in the laminated glass. The light-blocking region has at least one first display region, and the at least one first display region is configured for reflecting a projection light ray emitted by a projection assembly to form a first primary image. The heating element is disposed between the outer glass and the inner glass, and the heating element is configured for generating heat when the heating element is energized. The light-shielding layer includes a first light-shielding layer. The first light-shielding layer is disposed on the second surface. The heating element is disposed between the adhesive layer and the second surface or between the adhesive layer and the third surface. The laminated glass further includes an enhanced reflection coating. The enhanced reflection coating is disposed on the fourth surface. The enhanced reflection coating at least partially covers the at least one first display region. The enhanced reflection coating is configured to increase a reflectivity of the at least one first display region for P-polarized light. The light-transmitting region has at least one second display region, and the at least one second display region is configured for reflecting the projection light ray emitted by the projection assembly to form a second primary image. The laminated glass further includes an enhanced reflection coating. The enhanced reflection coating at least partially covers the at least one second display region. The enhanced reflection coating is configured to increase a reflectivity of the at least one second display region for P-polarized light. The light-shielding layer includes a second light-shielding layer. The second light-shielding layer is disposed on the third surface or the fourth surface. The second light-shielding layer at least covers the at least one first display region. The heating element is disposed between the second light-shielding layer and the second surface. The light-transmitting region has at least one second display region, and the at least one second display region is configured for reflecting the projection light ray emitted by the projection assembly to form a second primary image. The laminated glass further includes an enhanced reflection coating. The enhanced reflection coating is disposed on the fourth surface. The enhanced reflection coating at least partially covers the at least one second display region. The enhanced reflection coating is configured to increase a reflectivity of the at least one second display region for P-polarized light. A reflectivity of the at least one first display region for the P-polarized light is greater than or equal to 10%; and/or the light-transmitting region has at least one seco