CN113966021B

CN113966021B - Single-sheet heating glass for vehicle

Info

Publication number: CN113966021B
Application number: CN202111304090.XA
Authority: CN
Inventors: 陈志新; 吴声桂; 关金亮
Original assignee: Fuyao Glass Industry Group Co Ltd
Current assignee: Fuyao Glass Industry Group Co Ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-07-19
Anticipated expiration: 2041-11-05
Also published as: CN113966021A

Abstract

The invention relates to a vehicle single-piece heating glass, which comprises a single-piece glass substrate, a composite conductive film and a conductive element, wherein the single-piece glass substrate is provided with a plurality of conductive holes; the edge of the single glass substrate is provided with a shielding belt in a surrounding way; the composite conductive film comprises a transparent conductive oxide film and a protective film, wherein the transparent conductive oxide film is arranged on the surface of the single glass substrate, the inner edge of the shielding belt is completely covered by the outer edge of the transparent conductive oxide film, the protective film is arranged on the surface of the transparent conductive oxide film, and the outer edge of the protective film is aligned with or covers the inner edge of the shielding belt. According to the invention, the composite conductive film is arranged on the glass substrate for heating to replace silver paste printing heating, so that the visual field interference caused by silver paste printing is avoided; the protective film covered on the surface of the transparent conductive oxide film can prevent the transparent conductive oxide film from falling off, oxidizing or scratching in the using process.

Description

Single-sheet heating glass for vehicle

Technical Field

The invention relates to the technical field of heating glass.

Background

In the existing heating glass, the glass heated by using the transparent heating film is generally laminated glass, and the transparent heating film is generally sandwiched between two pieces of glass, so that the transparent heating film can be protected by the glass to prevent the film system from being scratched or oxidized in the using process, for example, an electric heating automobile windshield glass with the publication number of CN104401207B is that an FTO conductive thin film is arranged in the laminated glass to realize the function of heating the surface of the glass. However, although the laminated glass product does not have the problem of influencing the visual field, such as silver paste printing, the laminated glass product needs more processes and materials, is high in cost and heavy in weight, and is not suitable for economically applicable vehicle types with the requirements of energy conservation, environmental protection and light weight.

On traditional toughened glass such as side window, skylight, back shelves, generally adopt silver thick liquid printing heating, but can have the printing line behind the silver thick liquid printing, interfere with the visual field to some extent, and the silver thick liquid layer is thinner, uses improper easy oxidation that drops, produces the quality problem, can't expose the use for a long time.

Disclosure of Invention

In order to overcome the defects of the prior art, the technical problems to be solved by the invention are how to prevent the heating element on the surface of the glass from influencing the sight and how to solve the problems of easy falling, oxidation and scratch when the transparent heating film is applied to the surface of a single piece of glass.

In order to solve the technical problems, the invention adopts the technical scheme that: a vehicular single-sheet heating glass comprises a single-sheet glass substrate, a composite conductive film and a conductive element;

a shielding belt is arranged at the edge of the single glass substrate in a surrounding manner;

the composite conductive film comprises a transparent conductive oxide film and a protective film, wherein the transparent conductive oxide film is arranged on the surface of the single glass substrate, the outer edge of the transparent conductive oxide film completely covers the inner edge of the shielding belt, the protective film is arranged on the surface of the transparent conductive oxide film, and the outer edge of the protective film is aligned with or covers the inner edge of the shielding belt;

the conductive element is electrically connected with the transparent conductive oxide film, and a spacer is arranged between the conductive element and the protective film and used for preventing the conductive element and the protective film from being in direct contact.

Further, the transparent conductive oxide film comprises at least one dielectric layer and a conductive layer, wherein the dielectric layer comprises at least one of oxide, nitride and oxynitride of Si, and the conductive layer comprises at least one of ITO, FTO, AZO and ATO.

Further, the single glass substrate is tempered glass.

Further, the conductive element is a bus bar printed or adhered on the surface of the transparent conductive oxide film, and the bus bar comprises at least one of silver paste or copper foil.

Further, the masking tape is opaque ink.

Further, the composite conductive film has a thickness of 50nm to 500 nm.

Go toStep (b), the single heating glass sheet for the vehicle has 5-35 ohm/m²The surface resistance of (1).

Further, the protective film is a PET film or a PVC film covered on the surface of the transparent conductive oxide film through gluing or electrostatic adsorption, or a silane compound prepared by a sol-gel method coated on the surface of the transparent conductive oxide film, or silicon nitride or a silicon nitride and silicon oxide compound or aluminum-doped silicon oxide or silicon carbide which is coated on the surface of the transparent conductive oxide film through magnetron sputtering.

Furthermore, the single glass substrate comprises a main heating area and a functional area which are electrically isolated from each other, the transparent conductive oxide film in the main heating area completely covers the whole main heating area, the transparent conductive oxide film in the functional area is provided with a plurality of hollowed grids, and at least one transparent area which is not covered with the transparent conductive oxide film is arranged in the functional area.

Further, the length of the perspective area is L1, the width of the perspective area is H1, the length of the main heating area is L2, the width of the main heating area is H2, and the ratio of the size of the perspective area to the size of the main heating area is L1/H1-0.02L 2/H2-0.2L 2/H2.

Further, the edge of the transparent area is provided with a transparent conductive oxide film with the width of at least 1mm in a surrounding mode.

Furthermore, at least one opening is formed in the transparent conductive oxide film surrounding the transparent area, so that the surrounding transparent conductive oxide film is in a non-closed ring shape.

Further, the area of the grid gradually increases from the edge of the single glass substrate to the center of the single glass substrate.

Furthermore, the single glass substrate also comprises a breakage alarm area electrically isolated from the main heating area, and an induction structure used for detecting whether the single glass substrate is broken or not is arranged in the breakage alarm area.

The invention has the beneficial effects that: the composite conductive film is arranged on the glass substrate for heating to replace silver paste printing heating, so that the visual field interference caused by silver paste printing is avoided; the protective film covered on the surface of the transparent conductive oxide film can effectively prevent the transparent conductive oxide film from falling off, oxidizing or scratching in the using process; the spacer between the conductive element and the protective film can prevent the conductive element from being covered by the protective film to influence the heat dissipation efficiency of the conductive element, and can prevent the conductive element and the protective film from being electrically connected to influence the heating efficiency of the transparent conductive oxide film.

Drawings

FIG. 1 is a schematic structural view of a single sheet of vehicular heating glass according to an embodiment of the present invention;

FIG. 2 is a top view of a single sheet of vehicular heating glass according to an embodiment of the present invention;

FIG. 3 is a schematic view of a transparent conductive oxide film according to an embodiment of the present invention;

FIG. 4 is a schematic view showing the structure of each heating zone of a single sheet of heating glass for a vehicle according to an embodiment of the present invention;

description of reference numerals:

1. a monolithic glass substrate; 11. a main heating zone; 12. a see-through region; 13. a functional region; 14. a rupture warning zone; 2. compounding the conductive film; 21. a transparent conductive oxide film; 211. a dielectric layer; 212. a conductive layer; 22. a protective film; 3. a conductive element; 4. a masking tape.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 4, a monolithic heating glass for a vehicle according to the present invention includes a monolithic glass substrate 1, a composite conductive film 2 and a conductive element 3, and in one embodiment, the monolithic heating glass for a vehicle according to the present invention is used as a rear windshield of a vehicle;

as shown in fig. 1, the edge of the single glass substrate 1 is provided with the shielding tape 4 in a surrounding manner, the shielding tape 4 is an opaque tape arranged around the edge of the single glass substrate 1, the shielding tape 4 is a black edge formed by printing ceramic ink on the edge of the single glass substrate 1, and the black edge can cover the sealing rubber strip on the edge of the single glass substrate 1, so that direct irradiation of sunlight to the sealing rubber strip is prevented, and the sealing rubber strip is prevented from being aged and damaged by the direct irradiation of ultraviolet rays of sunlight. Meanwhile, the black edge can also shield adhesive tape marks after the single glass substrate 1 is installed on a vehicle and various accessories connected on the inner surface of the single glass substrate 1, so that the whole body is more attractive when a person observes the vehicle window of the vehicle. In addition, when an automobile is exposed to the sun, the metal temperature of an automobile body can rise quickly, because the single glass substrate 1 absorbs less heat and rises slowly relative to the metal of the automobile body, the edge of the single glass substrate 1 is in contact with the metal of the automobile body, so that the temperature rises quickly, the middle part of the single glass substrate rises slowly, the temperature rise between different parts is unbalanced, and the expansion amount of the different parts is different, the single glass substrate 1 is easily cracked by internal stress, the shielding belt 4 can play a role in transition and heat absorption, the single glass substrate 1 is heated as uniformly as possible, and the expansion stress of the single glass substrate 1 is controlled within a certain degree, so that the single glass substrate 1 is not cracked;

as shown in fig. 3, the composite conductive film 2 includes a transparent conductive oxide film 21 and a protective film 22, the transparent conductive oxide film 21 is disposed on the surface of the single glass substrate 1, the outer edge of the transparent conductive oxide film 21 completely covers the inner edge of the masking tape 4, the protective film 22 is disposed on the surface of the transparent conductive oxide film 21, the outer edge of the protective film 22 is aligned with the inner edge of the masking tape 4 or covers the inner edge of the masking tape 4;

in the embodiment shown in fig. 2, the masking tape 4 is disposed around the edge of the single glass substrate 1, the transparent conductive oxide film 21 is disposed on the surface of the single glass substrate 1 and covers the masking tape 4, the protective film 22 is disposed on the surface of the transparent conductive oxide film 21, and the edge of the protective film 22 also completely covers the inner edge of the masking tape 4, and furthermore, in a preferred embodiment, the edge of the protective film 22 is aligned with the inner edge of the masking tape 4;

the conductive element 3 is electrically connected to the transparent conductive oxide film 21, and a spacer for preventing direct contact between the conductive element 3 and the protective film 22 is provided between the conductive element 3 and the protective film 22.

The protective film 22 can prevent the surface of the transparent conductive oxide film 21 from being exposed to the outside, thereby preventing the transparent conductive oxide film 21 from falling off, being contaminated, being oxidized or being scratched during use. The space between the conductive member 3 and the protective film 22 prevents contact between the conductive member 3 and the protective film 22.

The transparent conductive oxide film 21 includes at least one dielectric layer 211 and a conductive layer 212, the dielectric layer 211 includes at least one of silicon (Si) oxide, silicon nitride, and silicon oxynitride, such as silicon dioxide, silicon nitride, or a mixture of silicon dioxide and silicon nitride, and the conductive layer 212 includes at least one of Indium Tin Oxide (ITO), fluorine-doped tin dioxide (FTO), aluminum-doped zinc oxide (AZO), and Antimony Tin Oxide (ATO).

Wherein, the single glass substrate 1 is toughened glass.

The conductive element 3 is a bus bar printed or adhered on the surface of the transparent conductive oxide film 21, and the bus bar includes at least one of silver paste or copper foil. In some embodiments, the busbar can be formed through the silver thick liquid of printing at least one deck on transparent conductive oxide film 21, or it forms to bond the copper foil on transparent conductive oxide film 21, in addition, also can use silver thick liquid and copper foil in order to reach better electrically conductive effect simultaneously mixedly, prints one deck silver thick liquid promptly on transparent conductive oxide film 21 to fixed one deck copper foil on the silver thick liquid, so not only can reduce the manufacturing cost of busbar, can also improve electrically conductive stability simultaneously.

The masking tape 4 is opaque ink. Preferably black ink, which is formed by printing on the edge of the glass substrate.

Wherein the composite conductive film 2 has a thickness of 50nm to 500 nm. The preferable thickness is in the range of 100 to 350 nm.

Wherein the monolithic heating glass for the vehicle has the thickness of 5-35 ohm/m²The surface resistance of (1). According to the specific values of the thickness and the surface resistance of the composite conductive film 2, the heating voltage can be selected to be12-60V.

The protective film 22 is a PET film or a PVC film covered on the surface of the transparent conductive oxide film 21 by adhesion or electrostatic adsorption, or a silane compound prepared by a sol-gel method coated on the surface of the transparent conductive oxide film 21, or a silicon nitride and silicon oxide compound or aluminum-doped silicon oxide or silicon carbide sputtered on the surface of the transparent conductive oxide film 21 by magnetron sputtering, and the protective film 22 is preferably adhered by a pressure sensitive adhesive when being connected by adhesion.

The single glass substrate 1 comprises a main heating area and a functional area which are electrically isolated from each other, a transparent conductive oxide film in the main heating area completely covers the whole main heating area, a plurality of hollowed grids are arranged on the transparent conductive oxide film in the functional area, and at least one transparent area which is not covered with the transparent conductive oxide film is arranged in the functional area. The transparent conductive oxide films between adjacent regions can be separated from each other in a film removing manner, so that an electrical isolation effect is achieved, and the transparent conductive oxide films 21 in the functional regions in different regions have different structures so as to achieve different heating effects. Compared with the existing structure for completely removing the film locally after the film is coated on the whole surface, the invention divides the single glass substrate 1 into a plurality of different areas and adjusts the structure of the transparent conductive oxide film 21 in each area to realize different heating effects, thereby avoiding the condition of uneven heating caused by pure completely removing the film locally.

In the embodiment shown in fig. 4, the single glass substrate 1 includes a main heating region 11 located in the middle of the single glass substrate 1, the main heating region 11 is mainly a visible region of the single glass substrate 1 for light transmission, and the transparent conductive oxide film 21 located in the main heating region 11 completely covers the entire main heating region 11, so that the entire main heating region 11 can be uniformly heated.

The single glass substrate 1 further comprises a functional area 13 located above the main heating area 11, the functional area 13 is mainly used for enabling functional elements such as a sensor or an antenna and the like installed in a corresponding area to normally work through the single glass substrate 1, the transparent conductive oxide film 21 located in the main heating area 11 completely covers the whole main heating area 11, the transparent conductive oxide film 21 located in the functional area 13 is provided with a plurality of hollowed-out grids, and the functional area 13 is internally provided with at least one see-through area 12 which is not covered with the transparent conductive oxide film 21, wherein the see-through area 12 can enable light of the sensor or the camera to normally penetrate through so as to avoid the influence on the work of the sensor or the camera caused by the refraction or reflection of the light by the film layers on the single glass substrate 1, and in the embodiment shown in fig. 4, the length of the see-through area 12 is L1, the width is H1, the length of the main heating area 11 is L2, the width is H2, the ratio of the size of the perspective area 12 to the size of the main heating area 11 meets the condition that L1/H1 is 0.02L 2/H2-0.2L 2/H2, in a certain embodiment, the area of the perspective area 12 meets the condition that L1/H1 is 0.02L 2/H2, in the embodiment, the area of the perspective area 12 is the smallest, the occupation ratio of the perspective area 12 can be reduced under the condition that the normal light transmission area of a camera or a sensor is ensured, and therefore the whole heating on the single glass substrate 1 can be ensured to be in the most uniform state; in one embodiment, the see-through area 12 has an area L1/H1 of 0.2 × L2/H2, and in this embodiment, the area of the see-through area 12 is the largest, so that the normal operation of various cameras or sensors can be satisfied to the greatest extent, and the see-through area 12 does not affect the heating and warming of other areas of the glass substrate 1. In addition, in other embodiments, the area of the see-through region 12 may satisfy L1/H1 ═ 0.08 × L2/H2, the area of the see-through region 12 may also satisfy L1/H1 ═ 0.1 × L2/H2, and the area of the see-through region 12 may also satisfy L1/H1 ═ 0.15 × L2/H2, the above listed area ratios of the see-through region 12 are only part of exemplary embodiments, and the area ratios of the see-through region 12 in the above mentioned ranges all belong to the claimed range of the present invention, and are not listed here. The edge of the see-through area 12 is surrounded by a transparent conductive oxide film 21 with a width of at least 1mm to heat the see-through area 12. The surrounding form of the transparent conductive oxide film 21 surrounding the see-through area 12 may be set according to the outline shape of the sensor or the camera, and may be specifically a circle, a square or a trapezoid, or may be any other geometric shape. In addition, the transparent conductive oxide film 21 in the see-through region 12 and the transparent conductive oxide film 21 in the main heating region 11 may share the same conductive element 3 to realize a heating function, or the main heating region 11 and the see-through region 12 may be independently heated by using separate conductive elements 3. The transparent conductive oxide film surrounding the transparent area is provided with at least one opening so that the surrounding transparent conductive oxide film is in a non-closed ring shape. Regardless of the surrounding form of the transparent conductive oxide film 21, the ring structure thereof has at least one opening to make the ring-shaped transparent conductive oxide film 21 in a non-closed state.

The transparent conductive oxide film in the functional area except the transparent area is provided with a plurality of hollowed grids, so that microwave signals of the antenna in the vehicle can smoothly penetrate through the glass substrate, and a good communication purpose is achieved. The hollow grids enable the transparent conductive oxide film 21 positioned in the transparent area to integrally form a net shape, so that the transparent conductive oxide film 21 does not influence signal transmission in the vehicle under the condition of not losing the heating function. The grids of the hollow can be rectangular or circular or other geometric shapes, and the adjacent grids can be communicated with each other to enlarge the hollow area, so that the signal transmission is smoother.

Wherein the area of the grid gradually increases from the edge close to the single glass substrate 1 to the direction close to the center of the single glass substrate 1. Thus, on the one hand, the optical improvement of the molding of the shielding tape 4 area can be facilitated, on the other hand, the appearance can be more beautiful, in order to ensure the permeability of the microwave signal, the size range of the grid is 0.2 × 0.2mm to 2 × 2mm, in one embodiment, the size of the grid is 0.2 × 0.2mm, in this embodiment, the size of the grid is the smallest, the transparent conductive oxide film 21 of the functional area 13 can be more dense under the condition of ensuring the signal transmission, and thus the heating of the functional area 13 is more uniform, in one embodiment, the size of the grid is 2 × 2mm, in this embodiment, the size of the grid is the largest, the good transmission of the signal can be ensured to the greatest extent, and the heating and the temperature rise of other areas of the glass substrate 1 can not be influenced. In other embodiments, the size of the grid may be 0.6 × 0.6mm, the size of the grid may be 1 × 1mm, the size of the grid may be 1.5 × 1.5mm, and in other embodiments, the size of each grid may be different, for example, the size of each grid increases linearly from 0.2 × 0.2mm to 2 × 2mm or decreases linearly from 2 × 2mm to 0.2 × 0.2mm from the edge of the glass substrate 1 to the center of the glass substrate 1, and the size of the grid may be alternatively distributed. The dimensions of the grid listed above are only a few exemplary embodiments, and the dimensions of the grid within the above ranges are all within the scope of the claimed invention and are not listed here.

Wherein, the single glass substrate 1 further comprises a breakage warning region 14 electrically isolated from the main heating region 11, and a sensing structure for detecting whether the single glass substrate 1 is broken is arranged in the breakage warning region 14, wherein the sensing structure can be a strain sensor, or a circuit element, such as a wire or a conductive film, when the glass surface is broken, the resistance of the wire or the conductive film changes, so that an external warning circuit gives a warning of glass breakage.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the accompanying drawings, which are directly or indirectly applied to the related technical fields, are included in the scope of the present invention.

Claims

1. A vehicular single-sheet heating glass is characterized by comprising a single-sheet glass substrate, a composite conductive film and a conductive element;

a shielding belt is arranged at the edge of the single glass substrate in a surrounding way;

2. The monolithic heating glass for vehicle as claimed in claim 1, wherein the transparent conductive oxide film comprises at least one dielectric layer comprising at least one of an oxide, nitride or oxynitride of Si and a conductive layer comprising at least one of ITO, FTO, AZO, ATO.

3. The monolithic heating glass for vehicle as claimed in claim 1, wherein the monolithic glass substrate is a tempered glass.

4. The monolithic heating glass as recited in claim 1, wherein the conductive element is a bus bar printed or bonded to a surface of the transparent conductive oxide film, the bus bar comprising at least one of silver paste or copper foil.

5. The monolithic heating glass as claimed in claim 1, wherein the masking tape is an opaque ink.

6. The monolithic heating glass for vehicle as claimed in claim 1, wherein the composite conductive film has a thickness of 50nm to 500 nm.

7. The monolithic heating glass for vehicle as claimed in claim 1, wherein the monolithic heating glass for vehicle has a thickness of 5-35 ohm/m²The surface resistance of (1).

8. The monolithic heating glass for vehicle as claimed in claim 1, wherein the protective film is a PET film or a PVC film coated on the surface of the transparent conductive oxide film by adhesion or electrostatic adsorption, or a silane compound prepared by a sol-gel method coated on the surface of the transparent conductive oxide film, or silicon nitride or a silicon nitride and silicon oxide composite or aluminum-doped silicon oxide or silicon carbide coated on the surface of the transparent conductive oxide film by magnetron sputtering.

9. The vehicular single-sheet heated glass according to claim 1, wherein the single-sheet glass substrate comprises a main heating area and a functional area, the main heating area and the functional area are electrically isolated from each other, the transparent conductive oxide film in the main heating area completely covers the whole main heating area, the transparent conductive oxide film in the functional area is provided with a plurality of hollowed-out grids, and at least one transparent viewing area not covered by the transparent conductive oxide film is arranged in the functional area.

10. The vehicular single sheet heating glass according to claim 9, wherein the length of the see-through region is L1, the width of the see-through region is H1, the length of the main heating region is L2, the width of the main heating region is H2, and the ratio of the size of the see-through region to the size of the main heating region is L1/H1 ═ 0.02 ═ L2/H2-0.2 ═ L2/H2.

11. The monolithic heating glass for vehicle as claimed in claim 9, wherein the edge of the see-through region is surrounded by a transparent conductive oxide film having a width of at least 1 mm.

12. The monolithic heating glass as recited in claim 11, wherein the transparent conductive oxide film surrounding the see-through region has at least one opening such that the surrounding transparent conductive oxide film is in a non-closed ring shape.

13. The monolithic heating glass for vehicle as claimed in claim 9, wherein the area of the mesh gradually increases from the edge of the monolithic glass substrate toward the center of the monolithic glass substrate.

14. The monolithic heating glass for vehicle as defined in claim 9, further comprising a breakage warning region electrically isolated from the main heating region, wherein the breakage warning region is provided with an induction structure for detecting whether the monolithic glass substrate is broken.