WO2024104318A2

WO2024104318A2 - Luminous glass with pattern and window assembly

Info

Publication number: WO2024104318A2
Application number: PCT/CN2023/131427
Authority: WO
Inventors: Xiaonan Zhang; Ce Shi; Claire DAVIS
Original assignee: Saint-Gobain Glass France
Priority date: 2022-11-16
Filing date: 2023-11-14
Publication date: 2024-05-23
Also published as: CN117141203A; WO2024104318A8

Abstract

The present disclosure provides a luminous glass with pattern and a window assembly. The luminous glass comprises a glass body and a pattern formed by a light extraction layer arranged on the glass body, wherein the light extraction layer is configured to meet that, in a non-illumination state, different regions of the pattern formed by the light extraction layer have different visibility; in an illumination state, different regions of the pattern formed by the light extraction layer have different brightness. According to the luminous glass disclosed by the present disclosure, the pattern is constructed to have significant visual difference in the non-illumination state and the illumination state, so that the spatial sense or deep effect of the pattern can be provided on the premise of not affecting the performance and aesthetics of the glass itself, a richer and more comfortable atmosphere can be created, and the use experience of consumers can be improved. The luminous glass disclosed by the present disclosure is easy to implement, and the performance is obviously improved. By designing the light extraction layer for forming the pattern in various ways, it can be applied to various occasions to meet the diversified needs of the consumers.

Description

LUMINOUS GLASS WITH PATTERN AND WINDOW ASSEMBLY

FIELD

The present disclosure relates to the technical field of glass, in particular to a luminous glass with pattern and a window assembly using the luminous glass.

BACKGROUND

With the rapid development of automobile industry and the increasing demand of consumers for vehicle functions, luminous glass with decorative pattern has been widely valued by vehicle manufacturers and favored by the consumers. The pattern of the luminous glass is usually based on enamel or ink to form a pattern area on the glass surface. When incident light emitted by a light source arranged on the side or bottom of the glass or integrated in the glass is projected to the pattern area, the light is scattered or diffused to emerge through the pattern area due to the change of the surface structure, thus realizing the lighting effect of pattern luminescence. The existing luminous glass usually changes the pattern shape and lighting area to meet the requirements of the consumers, but the consumers still expect the pattern to bring more different feelings and experiences when the pattern is illuminated.

SUMMARY

The object of the present disclosure is to propose a luminous glass with pattern. Different regions of the pattern on the luminous glass can present different visual differences in both a non-illumination state and an illumination state, and such visual differences bring more unique spatial sense, which can not be achieved by a single pattern, thus enhancing the consumer experience.

To this end, according to one aspect of the present disclosure, a luminous glass with pattern is provided. The luminous glass comprises a glass body and a pattern formed by a light extraction layer arranged on the glass body, wherein the light extraction layer is configured to meet that: in a non-illumination state, different regions of the pattern formed by the light extraction layer have different visibility; in an illumination state, different regions of the pattern formed by the light extraction layer have different brightness.

According to the above technical concept, the embodiment of the present disclosure may further include any one or more of the following alternative forms.

In some alternative forms, the light extraction layer comprises a first light extraction structure and a second light extraction structure, and the first light extraction structure and the second light extraction structure have different optical properties.

In some alternative forms, the first light extraction structure and the second light extraction structure are made of different materials, wherein the thickness of the pattern formed by the first light extraction structure is the same as or different from that for the second light extraction structure, and/or the line width diameter of the line form of the pattern formed by the first light extraction structure is the same as or different from that for the second light extraction structure, so as to appear different optical properties.

In some alternative forms, the first light extraction structure and the second light extraction structure are made of the same material, wherein the thicknesses of the pattern formed by the first light extraction structure is different from that for the second light extraction structure, and/or the line width diameter of the line form of the pattern formed by the first light extraction structure is different from that for the second light extraction structure, so as to appear different optical properties.

In some alternative forms, the first light extraction structure and the second light extraction structure are arranged on the same surface.

In some alternative forms, the line form of the pattern formed by the first light extraction structure and the second light extraction structure is constructed as at least one of straight line, polyline and curved line.

In some alternative forms, the light extraction layer is formed on the glass body by screen printing or inkjet printing.

In some alternative forms, the light extraction layer is made of enamel, and the enamel in different regions has different visibility and brightness.

In some alternative forms, the luminous glass further optionally comprises a functional layer attached to the glass body, and the light extraction layer is arranged on any one of the glass body and the functional layer or arranged therebetween.

According to another aspect of the present disclosure, a window assembly is provided. The window assembly comprises a luminous glass with pattern as mentioned above. The window assembly comprises door, window, curtain wall, vehicle window glass, airplane glass or ship glass.

In some alternative forms, the window assembly is a vehicle window glass comprising front windshield, rear windshield, skylight glass, vehicle door glass or corner window glass.

In some alternative forms, the luminous glass comprises a first glass body and a second glass body attached by an intermediate layer; the first glass body has a first surface and a second surface arranged oppositely, and the second glass body has a third surface facing the second surface and a fourth surface arranged oppositely, wherein the first surface of the first glass body faces the outside of the vehicle and the fourth surface of the second glass body faces the inside of the vehicle; and wherein the light extraction layer is arranged on the third surface or the fourth surface.

In some alternative forms, the luminous glass comprises a first glass body and a second glass body attached by an intermediate layer, and an optional functional layer sandwiched between the first glass body and the second glass body, and wherein the light extraction layer is arranged on any one of the first glass body, the second glass body, the intermediate layer and the functional layer or arranged therebetween.

According to the luminous glass disclosed by the present disclosure, the pattern is constructed to have significant visual difference in the non-illumination state and the illumination state, so that the spatial sense or deep effect of the pattern can be provided on the premise of not affecting the performance and aesthetics of the glass itself, a richer and more comfortable atmosphere can be created, and the use experience of the consumers can be improved. The luminous glass disclosed by the present disclosure is easy to implement, and the performance is obviously improved. By designing the light extraction layer for forming the pattern in various ways, it can be applied to various occasions to meet the diversified requirements of the consumers.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the present disclosure will be better understood by the following alternative embodiments described in detail in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar parts, in the drawings:

Fig. 1 is a schematic view of a pattern applied to a luminous glass;

Fig. 2 is a partial schematic view of a pattern on a luminous glass according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed merely exemplify the specific ways of implementing and using the present disclosure, and do not limit the scope of the disclosure. When describing the structural positions of various components, such as the directions of upper, lower, top, bottom, etc., the description is not absolute, but relative. When the various components are arranged as shown in the figures, these directional expressions are appropriate, but when the positions of the various components in the figures would be changed, these directional expressions would also be changed accordingly.

In this context, the expression "comprising" or similar expressions "including" , "containing" and "having" which are synonymous are open, and do not exclude additional unlisted elements, steps or ingredients. The expression "consisting of …" excludes any element, step or ingredient that is not specified. The expression "consisting essentially of …" means that the scope is limited to the specified elements, steps or ingredients, plus the optional elements, steps or ingredients that do not materially affect the basic and new features of the claimed subject matter. It should be understood that the expression "comprising" covers the expressions "consisting essentially of" and "consisting of" .

In this context, the terms "first" , "second" and so on are not used to limit the sequence and the number of components unless otherwise stated.

In this context, the meanings of "a plurality of " and "multiple layers" refer to two or more than two, unless otherwise specified.

In this context, unless otherwise specified, the terms such as "installation" , "connection" and "attach" should be understood broadly. For example, it can be fixed connection, detachable connection or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meanings of the above terms in this context can be understood according to specific situations.

Hereinafter, the luminous glass applied to a vehicle window glass will be described, but it is not excluded that the luminous glass can be applied to other environments such as door, window, curtain wall, airplane glass or ship glass. When the luminous glass is used to describe the vehicle window glass of a vehicle, "outside" and "inside" refer to the directions relative to vehicle body, "outside" refers to the direction away from the vehicle body and "inside" refers to the direction facing the vehicle body. It should be understood that the vehicle window glass according to the embodiment of the present disclosure includes, but is not limited to, front windshield, rear windshield, skylight glass, vehicle door glass or corner window glass, which can provide different illumination effects based on different requirements.

In the ever-changing automobile industry, luminous glass with lighting and decorative effects has been widely used in such as vehicle skylight of mid-to-high-end vehicles, which can not only achieve the effects of light shading and/or color change, but also form lighting effects with different patterns by combining coatings and/or sandwich structures. For the pattern in the form of coating, the light extraction technology that forms pattern based on enamel or ink coating on the glass surface is often used in the prior art. For example, a pattern 100 applied to a luminous glass as shown in Fig. 1 is usually formed by printing a layer of enamel. Even if straight lines 110 and polylines 120 are staggered to obtain a unique decorative effect, in the non-illumination state (normal state) , the observed pattern is monotonous because the enamel used has only one kind of visibility and color (usually completely opaque white) . In the illumination state, regardless of the distribution of the pattern and the position of the light source, it can be considered that all regions of the pattern are illuminated uniformly, and it is difficult to achieve different lighting effects by controlling the brightness. Therefore, the above-mentioned existing methods for forming the pattern can not satisfy the manufacturers and the consumers.

It should be noted that the above description provides background information related to the present disclosure, but the pattern design shown is not meant to be prior art.

In order to improve the existing luminous glass to obtain a spatial visual effect different from the conventional monotonous pattern, the present disclosure provides a luminous glass with pattern, which comprises a glass body and a pattern formed by a light extraction layer arranged on the glass body, wherein the light extraction layer is configured to meet that: in a non-illumination state, different regions of the pattern formed by the light extraction layer have different visibility; in an illumination state, different regions of the pattern formed by the light extraction layer have different brightness. Here, different regions of the pattern do not include regions other than the light extraction layer.

In this context, "visibility" is also called conspicurity. Specifically speaking, it refers to the extent to which an observer can see a pattern on a transparent glass in the non-illumination state, which is usually determined by the light transmittance of the material and L value (the brightness of the color, a positive number means white and a negative number means black) in the color LAB value of the material. Depending on the material forming the pattern, the pattern may exhibit, for example, translucent for low visibility or opaque for high visibility. It should be understood that for visibility, it is the observer’s intuitive experience of the clarity of pattern lines. When the same material is used, the pattern with larger thickness size has higher visibility than the pattern with smaller thickness size, and the pattern with thicker line (larger line width diameter) has higher visibility than the pattern with thinner line (smaller line width diameter) . For example, when the same material is used, although the light transmittance and the L value of the lines forming the pattern are the same, the thicker lines of the pattern are perceived by human eyes to be more visible to the observer, that is, the lines with different line width diameters formed by the same material appear different visibility. When different materials are used, even if the lines forming the pattern have the same line width diameter, the lines with lower L value will be perceived as more visible by human eyes because of the different light transmittance and the different L value, that is, the lines with the same line width diameter formed by different materials appear different visibility.

The "brightness" in this context is specific to the illumination state, and is usually determined by the refractive index of the material forming the pattern. For example, for the same material, the luminous intensity per unit area is the same, and the brightness presented by the pattern is related to the luminous intensity per unit area and the pattern area of the local region. The local region with a larger pattern area will make the brightness perceived by human eyes relatively high.

In this way, by changing the design of the pattern formed by the light extraction layer, the present disclosure also provides an illumination effect, that is, when the light source is turned off and in the non-illumination state, the pattern of the luminous glass has a spatial visual effect because different regions of the pattern formed by the light extraction layer have different visibility, and compared with the existing monotonous pattern, the luminous glass of the present disclosure brings different experiences to the consumers. When the light source is turned on and in the illumination state, because different regions of the pattern formed by the light extraction layer have different brightness, the luminous glass can not only appear a spatial effect when displaying the required lighting pattern, but also obtain unpredictable and rich visual effects if the lighting effect (such as color, light intensity, dynamic effect, etc. ) generated by the light source is combined.

Fig. 2 schematically illustrates a pattern 200 applied to a luminous glass according to an embodiment of the present disclosure. In order to achieve the above-mentioned spatial effect, the light extraction layer forming the pattern 200 includes a first light extraction structure and a second light extraction structure, wherein the first light extraction structure and the second light extraction structure have different optical properties. It should be understood that the light extraction structure is micro-structure or micro-texture, and the size is in the micron or even nanometer level. The incident light emitted by the light source will be reflected, scattered or diffused after contacting the light extraction structure, thus achieving the lighting effect. Depending on different requirements, a plurality of light extraction structures are feasible.

In this context, different optical properties should be understood as including different visibility of different light extraction structures in the non-illumination state and different brightness in the illumination state under the same material or different materials conditions. The visibility and brightness of different light extraction structures with the same material can be different by changing the thickness size of the pattern formed by the light extraction structures and/or the line width diameter (line diameter) of the line form of the pattern, or the visibility and brightness can be different through different light extraction structures with different materials under the conditions of the same or different thickness size and/or the same or different line width diameter.

In some embodiments, the light extraction layer is formed on the glass body by screen printing or inkjet printing. For instance, the light extraction layer is formed on the surface of the glass body by, for example, screen printing or inkjet printing. Alternatively, the light extraction layer is made of enamel, that is, the pattern is formed by the enamel, and the enamel in different regions of the pattern has different visibility and brightness. The main materials of the enamel are usually silicon dioxide, aluminum oxide and titanium dioxide, etc. In this way, based on the concept of the present disclosure, the above-mentioned different optical properties can be realized by different combinations of the enamel materials and/or the thickness sizes of the pattern and/or the line width diameters of the pattern.

As an example, two optional enamel materials with different visibility and brightness are listed in the following table, among which, enamel 1 is selected as commercially available PMI and enamel 2 is selected as commercially available Octopus.

In the above table, D indicates the particle size or particle diameter, D0.1=0.97 indicates that 10%of the particles in the enamel material have a diameter less than 0.97μm, D0.5=6.07 indicates that 50%of the particles in the enamel material have a diameter less than 6.07μm, D0.9=26.07 indicates that 90%of the particles in the enamel material have a diameter less than 26.07μm, and so on. Compared with the enamel 2, the average particle diameter or median particle diameter distribution of the enamel 1 is more concentrated, thus showing higher brightness and visibility.

As mentioned above, lines with the same line diameter formed by different materials can appear different visibility. For the enamel 1 and the enamel 2 listed in the above table, the visibility of the enamel 1 is higher than that of the enamel 2 under the same thickness size and line diameter size. As for brightness, it is an intuitive comparison under the same lighting conditions (such as the same light source, the same lighting environment, etc. ) , that is, under the same lighting conditions, the brightness of the enamel 1 is higher than that of the enamel 2, but the above enamel materials are only examples, not limitations. Depending on the choice of different materials and/or the change of different lighting conditions, it is not excluded that the brightness of the material used for the enamel 2 may be higher than that of the material used for the enamel 1 in some cases. Similarly, under the condition of different thickness sizes and/or line diameter sizes, for example, the lines formed by the enamel 1 are thin and slight, and the lines formed by the enamel 2 are fat and thick, the visibility of the material used as the enamel 2 may be higher than that of the material used as the enamel 1.

In an alternative embodiment, the first light extraction structure adopts the enamel 1 with a first thickness size, and the second light extraction structure adopts the enamel 1 with a second thickness size, the second thickness size is different from the first thickness size, so that the visual difference is significant. By choosing different thickness sizes, even if the enamel material is the same, the obtained pattern can appear significantly different visual differences in both the non-illumination state and the illumination state. The same is true for the line width diameter of pattern lines, which will not be described in detail below.

In an alternative embodiment, the first light extraction structure adopts the enamel 1 with a first thickness size, and the second light extraction structure adopts the enamel 2 with a second thickness size, the second thickness size is different from the first thickness size. Due to the different enamel materials and different thickness sizes, the first light extraction structure and the second light extraction structure can present different visibility in the non-illumination state, and the visual difference is significant. In addition, due to the use of different enamel materials and different thickness sizes, the obtained pattern can also appear significantly different visual differences under the illumination state. The same is true for the line width diameter of pattern lines, which will not be described in detail below.

In an alternative embodiment, the first light extraction structure adopts the enamel 1 with a first thickness size, and the second light extraction structure adopts the enamel 2 with the first thickness size. Due to the different enamel materials, the first light extraction structure and the second light extraction structure present different visibility in the non-illumination state, and the visual difference is significant. In this embodiment, although the thickness size is the same, due to the different enamel materials per se, the obtained pattern can also appear significantly different visual differences under the illumination state. The same is true for the line width diameter of pattern lines, which will not be described in detail below. In particular, the use of different enamel materials can more easily allow the pattern to achieve significantly different light and shade effects under the condition of using the same or similar lines (for example, the thickness size or line diameter is the same or similar) , so that the overall luminous pattern is more layered.

It should be understood that the above examples are not exhaustive of various alternative embodiments, and any other suitable enamel materials and various combinations of variations are feasible based on the concept of the present disclosure, for example, more than two enamel materials are adopted (for example, three enamel materials, four enamel materials, five enamel materials, six enamel materials, etc. ) . Moreover, depending on the requirements of pattern design, it should also be included in the scope of the present disclosure to adopt a plurality of light extraction structures, at least two of which for example being made of the same or different enamel materials, the same or different thickness sizes and/or line width diameters being adopted, and a plurality of light extraction structures forming a more complex and changeable pattern in a manner of multiple layers overlapped and staggered.

Depending on the application of the luminous glass, the glass body can be single-layer glass body or laminated glass. For the single-layer glass body, the first light extraction structure and the second light extraction structure may be arranged on the same surface of the single-layer glass body. In the way that the glass body is attached with a functional layer, the first light extraction structure and the second light extraction structure can also be arranged on the same surface of the functional layer or between the glass body and the functional layer. For the laminated glass, the glass body includes a first glass body having a first surface and a second surface, and a second glass body having a third surface and a fourth surface, and the first glass body and the second glass body are attached through an intermediate layer. When applied to the vehicle window glass, the first glass body can be called external glass, the first surface faces the outside of the vehicle, the second glass body can be called internal glass, and the fourth surface faces the inside of the vehicle. The first light extraction structure and the second light extraction structure are arranged on the third surface or the fourth surface. In this way, when the incident light emitted by the light source contacts the light extraction structure that needs to illuminate the pattern, it is beneficial for the light to reflect, scatter or diffuse, and part of the light is led out from the fourth surface to realize the illumination effect toward the inside of the vehicle.

In the form that the laminated glass includes one or more optional functional layers sandwiched between the first glass body and the second glass body, the light extraction layer including the first light extraction structure and the second light extraction structure may be arranged on any one of the first glass body, the second glass body, the intermediate layer and the functional layer or arranged therebetween. For example, the light extraction layer can be formed on the intermediate layer, or the functional layer. The intermediate layer includes but is not limited to polyvinyl butyral (PVB) or ethylene-vinyl acetate copolymer (EVA) and other adhesive layers suitable for laminated glass. The functional layer includes, but is not limited to, dimming layer, luminous layer, imaging layer, and the like.

Returning to the embodiment shown in Fig. 2, although the first light extraction structure and the second light extraction structure are arranged on the same surface, due to the different optical properties of the first light extraction structure and the second light extraction structure, combined with different pattern designs, the visual effect of spatial sense can be presented in a richer form.

In some embodiments, the line form of the pattern formed by the first light extraction structure and the second light extraction structure is configured as at least one of straight line, polyline and curved line. As described above, the line form of the first light extraction structure and the line form of the second light extraction structure may have different line width diameters, that is, different line thicknesses.

For example, in the pattern 200 shown in Fig. 2, the thinner straight lines or polylines 210 are staggered with the thicker straight lines or polylines 220, and the thinner curved lines 230 and the thicker curved lines 240 are staggered, wherein the thinner lines are printed for example by the enamel 2, and the thicker lines are printed for example by the enamel 1. The final effect is as follows: under the non-illumination state, according to the different characteristics of the two enamels, the thicker lines with high visibility (the straight lines or polylines 220 and the curved lines 240) are perceived as closer from the observer's point of view, while the thinner lines with low visibility (the straight lines or polylines 210 and the curved lines 230) are perceived as further away, so that the observer can experience the pattern 200 with spatial visual effect and with different visibility in the non-illumination state. Similarly, in the illumination state, the thicker lines (the straight lines or polylines 220 and the curved lines 240) appear higher brightness, while the thinner lines (the straight lines or polylines 210 and the curved lines 230) appear lower brightness, which also brings the observer a pattern with spatial sense.

It should be understood that in addition to the changes in shape, size and arrangement position, the color of enamel material can also be changed according to different requirements, and is not limited to white commonly used. For example, different enamels with different colors can achieve different display effects under the same lighting conditions.

As can be seen from the above description, according to the luminous glass of the present disclosure, the light extraction layer constituting the pattern is configured to have different visibility and brightness in different regions of the pattern, so that the illumination effect is ensured, and at the same time, a spatial visual effect different from the conventional pattern is provided, and the consumer experience is significantly improved. Furthermore, combined with the design and control of the light source, such as color and/or light intensity and/or lighting time, the luminous glass disclosed by the present disclosure can not only realize multi-level and deep illumination effects, but also realize dynamic/static lighting effects, such as running water, flickering, breathing, etc., thus further enriching the lighting effect and meeting the requirements of some specific scene atmospheres, and being widely used.

It should be understood here that the embodiments shown in the drawings only illustrate the optional shapes, sizes and arrangements of the pattern on the luminous glass according to the present disclosure; however, it is only illustrative rather than restrictive, and other shapes, sizes and arrangements can be adopted without departing from the spirit and scope of the present disclosure.

The technical content and technical features of the present disclosure have been disclosed above. However, it can be understood that those skilled in the art can make various changes and improvements to the above disclosed concept under the creative idea of the present disclosure, all of which fall within the protection scope of the present disclosure. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present disclosure is determined by the claims.

Claims

A luminous glass with pattern, wherein the luminous glass comprises a glass body and a pattern formed by a light extraction layer arranged on the glass body, and wherein the light extraction layer is configured to meet that:

in a non-illumination state, different regions of the pattern formed by the light extraction layer have different visibility;

in an illumination state, different regions of the pattern formed by the light extraction layer have different brightness.
The luminous glass with pattern according to claim 1, wherein the light extraction layer comprises a first light extraction structure and a second light extraction structure, and the first light extraction structure and the second light extraction structure have different optical properties.
The luminous glass with pattern according to claim 2, wherein the first light extraction structure and the second light extraction structure are made of different materials, and wherein the thickness of the pattern formed by the first light extraction structure is the same as or different from that for the second light extraction structure, and/or the line width diameter of the line form of the pattern formed by the first light extraction structure is the same as or different from that for the second light extraction structure, so as to appear different optical properties.
The luminous glass with pattern according to claim 2, wherein the first light extraction structure and the second light extraction structure are made of the same material, and wherein the thickness of the pattern formed by the first light extraction structure is different from that for the second light extraction structure, and/or the line width diameter of the line form of the pattern formed by the first light extraction structure is different from that for the second light extraction structure, so as to appear different optical properties.
The luminous glass with pattern according to any one of claims 2 to 4, wherein the first light extraction structure and the second light extraction structure are arranged on the same surface.
The luminous glass with pattern according to any one of claims 2 to 4, wherein the line form of the pattern formed by the first light extraction structure and the second light extraction structure is constructed as at least one of straight line, polyline and curved line.
The luminous glass with pattern according to claim 1, wherein the light extraction layer is formed on the glass body by screen printing or inkjet printing.
The luminous glass with pattern according to claim 1, wherein the light extraction layer is made of enamel, and the enamel in different regions has different visibility and brightness.
The luminous glass with pattern according to claim 1, wherein the luminous glass further optionally comprises a functional layer attached to the glass body, and the light extraction layer is arranged on any one of the glass body and the functional layer or arranged therebetween.
A window assembly comprising a luminous glass with pattern according to any one of claims 1 to 9, wherein the window assembly comprises door, window, curtain wall, vehicle window glass, airplane glass or ship glass.
The window assembly according to claim 10, wherein the window assembly is a vehicle window glass comprising front windshield, rear windshield, skylight glass, vehicle door glass or corner window glass.
The window assembly according to claim 11, wherein the luminous glass comprises a first glass body and a second glass body attached by an intermediate layer; the first glass body has a first surface and a second surface arranged oppositely, and the second glass body has a third surface facing the second surface and a fourth surface arranged oppositely, wherein the first surface of the first glass body faces the outside of the vehicle and the fourth surface of the second glass body faces the inside of the vehicle; and wherein the light extraction layer is arranged on the third surface or the fourth surface.
The window assembly according to claim 10 or 11, wherein the luminous glass comprises a first glass body and a second glass body attached by an intermediate layer, and an optional functional layer sandwiched between the first glass body and the second glass body, and wherein the light extraction layer is arranged on any one of the first glass body, the second glass body, the intermediate layer and the functional layer or arranged therebetween.