阅读说明：本技术 用于车辆玻璃的光导层、车辆玻璃和车辆内部照明系统 (Light guide layer for vehicle glazing, vehicle glazing and vehicle interior lighting system ) 是由 马思腾 王璐 于 2020-11-05 设计创作，主要内容包括：在此提供了一种用于车辆玻璃的光导层、车辆玻璃和车辆内部照明系统。该光导层或者车辆玻璃包括透明本体或玻璃本体,包括相对布置的第一表面和第二表面,并且透明本体适于被耦合至车辆玻璃以接收由布置在车辆的预定位置处的光源所发出的光源光并使光源光在透明本体内部传播；以及光漫射部,形成于透明本体或玻璃本体中或者第一表面和第二表面中的至少一个表面上,并且被构造为将传播到光漫射部处的光源光漫反射、散射和/或折射至第一表面或第二表面中的至少一个表面的预定区域,以使光源光从预定区域射出。(A light guide layer for a vehicle glazing, a vehicle glazing and a vehicle interior lighting system are provided. The light guiding layer or vehicle glazing comprises a transparent body or glass body comprising oppositely arranged first and second surfaces, and the transparent body is adapted to be coupled to the vehicle glazing to receive light source light emitted by a light source arranged at a predetermined position of the vehicle and propagate the light source light inside the transparent body; and a light diffusion part formed in the transparent body or the glass body or on at least one of the first surface and the second surface, and configured to diffusely reflect, scatter, and/or refract the light source light propagated to the light diffusion part to a predetermined region of at least one of the first surface or the second surface so that the light source light is emitted from the predetermined region.)

1. A light guiding layer (100) for a vehicle glazing (200), comprising:

a transparent body (101) comprising a first surface (1011) and a second surface (1012) arranged opposite and adapted to be coupled to a vehicle glazing (200) to be configured to receive light source light (L1) emitted by a light source (301) arranged at a predetermined position of a vehicle and propagate said light source light (L1) inside said transparent body (101); and

a light diffusing portion formed in the transparent body (101) or on at least one of the first surface (1011) and the second surface (1012), and configured to diffusely reflect, scatter and/or refract the light source light (L1) propagating thereto to a predetermined region of at least one of the first surface (1011) or the second surface (1012) to cause the light source light (L1) to exit therefrom.

2. A light guiding layer (100) according to claim 1, wherein said light diffusing portion comprises a microstructured portion (102) arranged on at least one of said first surface (1011) and said second surface (1012), and said microstructured portion (102) is configured to diffusely reflect or scatter said light source light (L1) propagating at said microstructured portion (102) to a predetermined area of at least one of said first surface (1011) or said second surface (1012) while allowing light (L2) propagating perpendicular to said first surface (1011) or said second surface (1012) to pass.

3. A light guiding layer (100) according to claim 2, wherein the microstructures (102) comprise at least one of:

a protrusion formed on at least one of the first surface (1011) and the second surface (1012) by additive means;

a recess formed on at least one of the first surface (1011) and the second surface (1012) by a subtractive method.

4. A light guiding layer (100) according to claim 2, wherein the dimensions of the microstructures (102) are micro-scale or nano-scale.

5. A light guiding layer (100) according to claim 2, wherein said microstructures (102) are formed on at least one of said first surface (1011) and said second surface (1012) by at least one of machining, chemical etching and photolithography, UV glue curing.

6. A light guiding layer (100) according to claim 1, wherein the transparent body (101) is preformed with a curvature matching the curvature of the vehicle glazing (200).

7. A light guiding layer (100) according to claim 1, wherein the transparent body (101) is deformable such that a change of the direction of the light source light (L1) by the micro-structured portions (102) is not affected if the transparent body (101) is deformed with a curvature matching a curvature of the vehicle glazing (200).

8. A light guiding layer (100) according to claim 1, wherein the transparent body (101) is adapted to be coupled to a visible area of the vehicle glazing (200).

9. A light guiding layer (100) according to claim 1, wherein the transparent body (101) is adapted to be arranged at a surface of the vehicle glazing (200).

10. A light guiding layer (100) according to claim 9, wherein the vehicle glazing (200) comprises laminated glass, the transparent body (101) being arranged between the laminated glass.

11. A light guiding layer (100) according to claim 1, wherein said light diffusing portion comprises suspended particles (103) arranged in said transparent body (101).

12. A light guiding layer (100) according to claim 1, wherein said light diffusing portion comprises an ink portion (104) arranged on at least one of said first surface (1011) and said second surface (1012).

13. A light guiding layer (100) according to claim 11, wherein the transparent body (101) is made of at least one of: polyethylene terephthalate (PET), Polycarbonate (PC), polymethyl methacrylate (PMMA), polyvinyl butyral (PVB), Ethylene Vinyl Acetate (EVA), thermoplastic polyurethane elastomer (TPU), or terephthalic acid (TPA).

14. A light guiding layer (100) according to claim 13, wherein the vehicle glass (200) comprises a laminated glass, the transparent body (101) being an intermediate layer (202) between a first glass layer (2011) facing towards the vehicle interior and a second glass layer (2012) facing towards the vehicle exterior in the laminated glass.

15. A light guiding layer (100) according to claim 1, wherein the light guiding layer is wrinkle resistant.

16. A light guiding layer (100) according to claim 1, wherein the light guiding layer is stretchable.

17. A light guiding layer (100) according to claim 12, wherein the ink portion (104) has an anti-stick property.

18. A light guiding layer (100) according to claim 12, wherein said ink portion (104) is compatible with bending temperatures.

19. A light guiding layer (100) according to claim 12, wherein said ink portions have L values greater than 58 in the chromaticity space LAB.

20. A light guiding layer according to claim 1, further comprising a thermally reflective layer (204) and/or a low-e layer (205) arranged at a surface of the light guiding layer.

21. A vehicle glazing (200) comprising:

a glass body (201); and

a light guiding layer (100) according to any one of claims 1-20.

22. The vehicle glazing (200) according to claim 21, wherein the light guiding layer (100) is arranged at a surface of the glass body (201) via an intermediate layer (202).

23. The vehicle glazing (200) of claim 21, further comprising:

a protective layer (203) arranged on a surface of the light guiding layer (100) remote from the glass body (201).

24. The vehicle glazing (200) of claim 21, wherein the glazing body (201) comprises a first glass layer (2011) and a second glass layer (2012), and

the light guiding layer (100) is arranged between the first glass layer (2011) and the second glass layer (2012) via an intermediate layer (202), or

The light guiding layer (100) is an intermediate layer (202) that bonds the first glass layer (2011) and the second glass layer (2012).

25. The vehicle glazing (200) according to claim 24, wherein the light guiding layer (100) is arranged between the first glass layer (2011) and the second glass layer (2012) via an intermediate layer (202), the light diffusing portion comprises a microstructure portion (102) arranged on at least one of the first surface (1011) and the second surface (1012), and the microstructure portion (102) is configured to allow light (L2) propagating perpendicular to the first surface (1011) or the second surface (1012) to pass therethrough, diffusely reflecting, scattering and/or directing the light source light (L1) propagating at the microstructure (102) to a predetermined area of at least one of the first surface (1011) or the second surface (1012), the optical refractive index of the intermediate layer (202) is different from the optical refractive index of the microstructure portion (102).

26. Vehicle glazing (200) according to any of claims 21-25, wherein the glazing body (201) is provided with a light source aperture for receiving at least a portion of a light source (301).

27. The vehicle glazing (200) of claim 26, wherein the light source aperture is formed such that the light source (301) received therein is disposed within a non-visible region of the vehicle glazing (200).

28. The vehicle glazing (200) according to claims 21-27, further comprising a heat reflective layer (204) and/or a low emissivity layer (205) arranged on an interior or surface of the vehicle glazing (200).

29. A vehicle glazing (200) comprising:

a glass body (201) comprising a first surface (2013) and a second surface (2014) arranged opposite, the glass body (201) being configured to receive light source light (L1) emitted by a light source (301) arranged at a predetermined position of a vehicle and to propagate the light source light (L1) inside the glass body (101); and

a light diffusing portion formed in the glass body (201), or on at least one of the first surface (2013) and the second surface (2014), and configured to diffusely reflect, scatter and/or refract the light source light (L1) propagating at the light diffusing portion to a predetermined region of at least one of the first surface (1011) or the second surface (1012) to cause the light source light (L1) to exit from the predetermined region.

30. The vehicle glazing of claim 29, wherein the light diffusing portion comprises a microstructured portion (102) disposed on at least one of the first surface (2013) and the second surface (2014), and the microstructured portion (102) is configured to diffusely reflect, scatter and/or refract the light source light (L1) propagating at the microstructured portion (102) to a predetermined region of at least one of the first surface (2013) or the second surface (2014) while allowing light (L2) propagating perpendicular to the first surface (2013) or the second surface (2014) to pass therethrough.

31. The vehicle glazing of claim 29, wherein the light diffusing portion comprises an ink portion (104) disposed on at least one of the first surface (2013) and the second surface (2014).

32. The vehicle glazing of claim 29, wherein the light diffusing portion comprises a coating or plating applied to a surface of the vehicle glazing (200) or an interior of the vehicle glazing (200).

33. The vehicle glazing of claim 29, wherein the light diffusing portion comprises suspended particles disposed in the glazing body (201).

34. The vehicle glazing (200) according to claims 29-33, further comprising a heat reflective layer (204) and/or a low emissivity layer (205) arranged on an interior or surface of the vehicle glazing (200).

35. A light guiding layer (100) according to claim 31, wherein said ink portion (104) is anti-adhesive.

36. A light guiding layer (100) according to claim 31, wherein said ink portion (104) is compatible with bending temperatures.

37. A light guiding layer (100) according to claim 31, wherein said ink portions have L values greater than 58 in the chromaticity space LAB.

38. A vehicle interior lighting system (300), comprising:

vehicle glazing (200) according to any of claims 21-37; and

a light source (301) arranged in the vicinity of at least a portion of the vehicle glazing (200) and/or in the vehicle glazing (200).

39. The vehicle interior lighting system (300) according to claim 38, wherein the light source (301) comprises at least one of a continuous light source, a linear light source, and a point light source.

40. The vehicle interior lighting system (300) according to claim 38, wherein the light source (301) is arranged around at least one of a first glass layer (2011) and a second glass layer (2012) of the vehicle glass (200).

41. The vehicle interior lighting system (300) of claim 38, wherein at least a portion of the vehicle glazing (200) comprises a light guide layer.

42. The vehicle interior lighting system (300) according to claim 38, wherein the light source (301) is arranged in at least one of a first glass layer (2011) and a second glass layer (2012) of the vehicle glass (200) via a light source aperture.

Technical Field

Embodiments of the present disclosure relate to a light guide layer, and more particularly, to a vehicle glass and a vehicle interior lighting system using the same.

Background

The vehicle lighting system is one of the necessary systems for the safe driving of the vehicle. The lamp mainly comprises an external lighting lamp, an internal lighting lamp, an external signal lamp, an internal signal lamp and the like. The vehicle interior lighting system consists of a ceiling lamp, an instrument lamp, a step lamp, a working lamp and a luggage compartment lamp. The device is mainly convenient for drivers and passengers. The vehicle lighting market is developing vigorously due to the functional and aesthetic value of vehicle interior lighting. This development is due, in part, to the variety of lighting locations and functions within the vehicle (from the overhead console to the footwell). With the advancement of automotive technology, vehicle interior lighting will play an increasingly important role in creating ambiance, influencing passenger mood, and providing entertainment.

Current vehicle interior lighting systems typically use light emitting diodes as light sources to provide illumination in the form of bulbs, light strips, lights, and light rings. Light emitting diodes may be integrated near the door handle for keyhole illumination, or turn blinkers on rear view mirrors, as well as pedal illumination and cup holder illumination, among others. The shape of the luminous indication can be very simple (direct transmission) and can also be made very complex to meet the requirement of accurate illumination.

Disclosure of Invention

Conventional vehicle interior lighting systems have certain drawbacks for technical reasons. For example, some direct light-transmission illumination methods may have problems such as glare. Furthermore, in order to meet the ever-increasing demands of people for quality of life, more and more automobile manufacturers plan to use non-traditional lighting and indicator systems in vehicle interior lighting systems. Embodiments of the present disclosure provide a light guide layer and automotive glazing illuminated using such a light guide layer that addresses, or at least partially addresses, the above-mentioned problems and other potential problems found in conventional vehicle interior lighting systems.

In a first aspect of the present disclosure, a light guiding layer for a vehicle glazing is provided. The light guide layer comprises a transparent body comprising oppositely arranged first and second surfaces and adapted to be coupled to a vehicle glazing to receive light source light emitted by a light source arranged at a predetermined position of the vehicle and propagate the light source light inside the transparent body; and a light diffusion part formed in the transparent body or on at least one of the first surface and the second surface, and configured to diffusely reflect, scatter, and/or refract the light source light propagated to the light diffusion part to a predetermined region of at least one of the first surface or the second surface to cause the light source light to be emitted from the predetermined region.

In some embodiments, the light diffusing portion includes a microstructure portion disposed on at least one of the first surface and the second surface, and the microstructure portion is configured to diffusely reflect, scatter, and/or refract the light source light propagating at the microstructure portion to a predetermined region of at least one of the first surface or the second surface while allowing light propagating perpendicular to the first surface or the second surface to pass therethrough.

In some embodiments, the microstructures comprise at least one of: a protrusion formed on at least one of the first surface and the second surface by an additive manner; a recess formed on at least one of the first surface and the second surface by a subtractive process.

In some embodiments, the dimensions of the microstructures are on the order of micrometers or nanometers.

In some embodiments, the microstructures are formed on at least one of the first and second surfaces by at least one of machining, chemical etching and photolithography, UV glue curing.

In some embodiments, the transparent body is preformed with a curvature that matches the curvature of the vehicle glazing.

In some embodiments, the transparent body is deformable such that the change of the direction of the light source light by the microstructure portion is not affected if the transparent body is deformed to a curvature matching the curvature of the vehicle glass.

In some embodiments, the transparent body is adapted to be coupled to a viewable area of a vehicle glazing.

In some embodiments, the transparent body is adapted to be disposed on a surface of a vehicle glazing.

In some embodiments, the vehicle glazing comprises laminated glass with the transparent body disposed between the laminated glass.

In some embodiments, the light diffusing portion comprises suspended particles disposed in the transparent body.

In some embodiments, the light diffusing portion includes an ink portion disposed on at least one of the first surface and the second surface.

In some embodiments, the transparent body is made of at least one of: polyethylene terephthalate, polycarbonate, polymethyl methacrylate, polyvinyl butyral, ethylene vinyl acetate, thermoplastic polyurethane elastomer or terephthalic acid.

In some embodiments, the vehicle glazing comprises a laminated glazing, and the transparent body is an interlayer between a first ply of glass facing the vehicle interior and a second ply of glass facing the vehicle exterior in the laminated glazing.

In some embodiments, the light guiding layer is wrinkle resistant.

In some embodiments, the light guiding layer is stretchable.

In some embodiments, the ink portion has anti-stick properties.

In some embodiments, the ink portion is compatible with bending temperatures.

In some embodiments, the ink portion has a value of L in the chromaticity space LAB that is greater than 58.

In some embodiments, the lightguide layer further includes a thermally reflective layer and/or a low emissivity layer disposed on a surface of the lightguide layer.

In a second aspect of the present disclosure, a vehicle glazing is provided. The vehicle glazing comprises a glazing body and a light guiding layer according to the first aspect of the disclosure.

In some embodiments, the light guiding layer is arranged at a surface of the glass body via an intermediate layer.

In some embodiments, the vehicle glazing further comprises a protective layer disposed on a surface of the light guiding layer remote from the glazing body.

In some embodiments, the glass body comprises a first glass layer and a second glass layer, and the light guiding layer is arranged between the first glass layer and the second glass layer via an intermediate layer or the light guiding layer is an intermediate layer bonding the first glass layer and the second glass layer.

In some embodiments, the light guiding layer is arranged between the first glass layer and the second glass layer via an intermediate layer, the light diffusing portion comprises a microstructure portion arranged on at least one of the first surface and the second surface, and the microstructure portion is configured to diffusely reflect, scatter and/or refract light source light propagating to the microstructure portion to a predetermined region of at least one of the first surface or the second surface while allowing light propagating perpendicular to the first surface or the second surface to pass therethrough, a light refractive index of the intermediate layer of the microstructure portion of the intermediate layer being different from a light refractive index of the microstructure portion.

In some embodiments, the glass body is provided with a light source aperture for receiving at least a portion of a light source.

In some embodiments, the light source aperture is formed such that the light source received therein is disposed within a non-viewable area of the vehicle glazing.

In some embodiments, the vehicle glazing further comprises a heat reflective layer and/or a low emissivity layer disposed on an interior or surface of the vehicle glazing.

According to a third aspect of the present disclosure, a vehicle glazing is provided. The vehicle glazing includes a glazing body including first and second oppositely disposed surfaces, the glazing body configured to receive light source light emitted by a light source disposed at a predetermined location of a vehicle and propagate the light source light inside the glazing body; and a light diffusion portion formed in the glass body or on at least one of the first surface and the second surface, and configured to diffusely reflect, scatter, and/or refract the light source light propagating at the light diffusion portion to a predetermined region of the at least one of the first surface or the second surface to cause the light source light to exit from the predetermined region.

In some embodiments, the light diffusing portion includes a microstructure portion disposed on at least one of the first surface and the second surface, and the microstructure portion is configured to diffusely reflect, scatter, and/or refract the light source light propagating thereto to a predetermined region of at least one of the first surface or the second surface while allowing light propagating perpendicular to the first surface or the second surface to pass therethrough.

In some embodiments, the light diffusing portion includes an ink portion disposed on at least one of the first surface and the second surface.

In some embodiments, the light diffusing portion comprises a coating or plating applied to a surface of the vehicle glazing or to an interior of the vehicle glazing.

In some embodiments, the light diffusing portion includes suspended particles disposed in the glass body.

In some embodiments, the vehicle glazing further comprises a heat reflective layer and/or a low emissivity layer disposed on an interior or surface of the vehicle glazing.

In some embodiments, the ink portion has anti-stick properties.

In some embodiments, the ink portion is compatible with bending temperatures.

In some embodiments, the ink portion has a value of L in the chromaticity space LAB that is greater than 58.

In some embodiments, the lightguide layer further includes a thermally reflective layer and/or a low emissivity layer disposed on a surface of the lightguide layer.

According to a fourth aspect of the present disclosure, a vehicle interior lighting system is provided. The vehicle interior lighting system includes a vehicle glass according to the second and third aspects of the present disclosure; and a light source arranged in the vicinity of at least a part of the vehicle glazing and/or in the vehicle glazing.

In some embodiments, the light source comprises at least one of a continuous light source, a linear light source, and a point light source.

In some embodiments, the light source is disposed about at least one of the first and second glass layers of the vehicle glazing.

In some embodiments, at least a portion of the vehicle glazing comprises a light guide layer.

In some embodiments, the light source is disposed in at least one of the first and second glass layers of the vehicle glass via the light source aperture.

It should be understood that this summary is not intended to identify key or essential features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become readily apparent from the following description.

Optionally, the lighting mode has the advantages of large light source area and soft light, and does not additionally occupy the limited space in the vehicle, so that the interior of the vehicle can be more concise.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present disclosure.

Fig. 1 shows a simplified schematic diagram of a light guiding layer according to an embodiment of the present disclosure;

fig. 2 and 3 show schematic views of a vehicle glazing using microstructures including embodiments according to the present disclosure;

figure 4 shows a schematic view of a light guiding layer comprising suspended particles according to an embodiment of the present disclosure;

5-8 illustrate schematic views of a vehicle glazing using a light guiding layer including suspended particles according to various embodiments of the present disclosure;

FIG. 9 shows a schematic view of a vehicle glazing including a light guiding layer of an ink portion, according to an embodiment of the present disclosure;

fig. 10-14 show schematic views of a vehicle interior lighting system including a light guide layer according to embodiments of the present disclosure; and

fig. 15-19 show schematic views of a heat reflective layer and a low emissivity layer disposed in a vehicle glazing, according to embodiments of the disclosure.

The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements.

Detailed Description

The present disclosure will now be described with reference to several example embodiments. It should be understood that these examples are described only for the purpose of enabling those skilled in the art to better understand and thereby enable the present disclosure, and are not intended to set forth any limitations on the scope of the technical solutions of the present disclosure.

As used herein, the term "include" and its variants are to be read as open-ended terms meaning "including, but not limited to. The term "based on" will be read as "based at least in part on". The terms "one embodiment" and "an embodiment" should be understood as "at least one embodiment". The term "another embodiment" should be understood as "at least one other embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions may be included below. The definitions of the terms are consistent throughout the specification unless the context clearly dictates otherwise.

Currently, most vehicle interior lighting systems also illuminate the light emitting diodes in a direct light transmission manner through a light guide or a lamp housing. For example, a light or reading light located in the ceiling of a vehicle is typically illuminated with an led light source in addition to a lamp housing.

On the one hand, there may be some drawbacks with this way of illumination. For example, although a transmissive lamp cover is used, the light emitted by this direct transmission method is still not uniform, and the light near the light source is strong and thus is more glaring. On the other hand, with the ever-increasing pursuit of quality of life, such a vehicle interior lighting system is gradually unable to meet the demand of people.

Embodiments of the present disclosure provide a light guide layer for a vehicle glazing that enables a portion of a vehicle lighting system to be disposed in the vehicle glazing to address, or at least partially address, the above or other potential problems of conventional vehicle interior lighting systems.

Fig. 1 shows a simplified schematic view of a light guiding layer 100 for a vehicle glazing 200 according to an embodiment of the present disclosure. The light guide layer refers to a layered construction that can be applied to vehicle glazing, and may include, but is not limited to: light guide films, light guide sheets, light guide plates, light guide coatings, and the like. The vehicle glazing 200 herein includes, but is not limited to: skylight glass, front windshield glass, rear window glass, door glass and/or corner glass, and the like. As shown in fig. 1, a light guiding layer 100 according to an embodiment of the present disclosure generally includes a transparent body 101 and a light diffusion part formed on the transparent body 101. The transparent body 101 has a film-like, sheet-like, or plate-like form, and includes two surfaces arranged oppositely. For convenience of description, these two surfaces will be referred to as a first surface 1011 and a second surface 1012, respectively, hereinafter.

Diffusing, as used herein, refers to at least one of diffusely reflecting, scattering, and/or refracting light. That is, the light diffusion portion is capable of diffusely reflecting, scattering, and/or refracting light rays that reach there. Diffuse reflection refers to light rays propagating in a number of directions different from the original propagation direction. Scattering refers to the propagation of light in multiple directions that deviate from the original propagation direction. The directions of dispersion are generally conically diverging and have one principal direction along the center of the cone. Due to the different but not very different refractive indices, the deviation of this main direction from the original propagation direction is small, e.g. in the range of less than 30 °. Refraction refers to the propagation of a light ray in a direction that is less divergent from the original propagation direction. Similarly, the refracted direction deviates from the original propagation direction by less than 30 °.

It should be noted that transparent body 101 herein may include any suitable structure that can be disposed in vehicle glazing 200, according to various embodiments. For example, the transparent body may be a layer in the form of a film disposed on the surface of the vehicle glazing 200 or in the vehicle glazing 200. In some alternative embodiments, the transparent body may also be an interlayer or any other suitable layer for bonding two glass layers in a laminated glass. As will be further described below.

The laminated glass herein refers to a composite glass product formed by two or more pieces of glass, between which one or more layers of organic polymer intermediate films are sandwiched, and permanently bonding the glass and the intermediate films into a whole through special high-temperature prepressing (or vacuumizing) and high-temperature high-pressure process treatment. By coupling the transparent body 101 to the vehicle glazing 200, the light guiding layer 100 is able to receive light source light L1 emitted by the light sources 301 arranged at predetermined positions of the vehicle and cause light source light L1 to propagate inside the transparent body 101.

The inventors redesigned the light guide layer 100 to be able to receive the light source light L1 and propagate the light source light L1 inside it, arranged in the vehicle glazing 200, according to the lighting requirements and arrangement of the vehicle interior. Propagation of light source light L1 inside transparent body 101 includes reflection and refraction of light rays inside first surface 1011 and second surface 1012, as shown in fig. 1. The light source light L1 may enter the inside of the transparent body 101 from at least one of the first surface 1011, the second surface 1012 and the edge of the transparent body 101 by incidence, refraction, scattering, etc., and most of the light source light L1 will be reflected inside the transparent body 101 to propagate inside the transparent body 101.

The light diffusion portion is configured such that the light source light propagating to the light diffusion portion is diffusely reflected, scattered, and/or refracted to a predetermined region of at least one of the first surface 1011 or the second surface 1012 to cause the light source light L1 to exit from the predetermined region. Taking the microstructure as an example, the diffuse reflection, scattering and/or refraction herein is not that the light source light L1 randomly propagates toward all directions under the action of the microstructure 102, but the microstructure 102 is configured such that the light source light L1 reaching the microstructure 102 can propagate within a predetermined angular range to make the light source light L1 exit at a predetermined region. For example, in some embodiments, light source light L1 that reaches microstructures 102 can continue to propagate in the range of-60 ° to 60 ° or more with respect to the normal direction (i.e., the direction perpendicular to the first surface). When propagating in the above range or more, the microstructure portion 102 is arranged such that more light rays propagate in an angular range adjacent to the normal line, so that the closer to the normal line direction, the stronger the light after being diffusely reflected, scattered, and/or refracted by the microstructure portion 102 is, thereby further improving the illumination effect. Of course, it should be understood that the same is true for the case where the light diffusion portion is an ink portion or suspended particles, and will not be described separately below.

The light source light L1 exiting in the predetermined region means that the predetermined region can emit light when viewed from the outside of the light guide layer 100 or the vehicle glass 200. That is, the predetermined area corresponds to the light source when viewed from the outside, which causes the predetermined area to have the effect of the light source to illuminate the interior of the vehicle. On the one hand, the illumination mode is emitted through light diffuse reflection, scattering and/or refraction, and is different from the traditional mode of direct light transmission, and the light of the illumination mode is more uniform and softer, so that the user experience is improved. On the other hand, the vehicle glass 200 is adopted in the lighting mode, and the lighting mode has the advantages of large light source area and soft light, and does not additionally occupy limited space in the vehicle, so that the interior of the vehicle can be simpler.

In some embodiments, the light diffusing portion comprises microstructures 102. The microstructure portion 102 is formed on at least one of the first surface 1011 and the second surface 1012. The microstructures 102 are transparent when the light source is off. The microstructure portion 102 is configured to allow light L2 propagating perpendicular to the first surface 1011 or the second surface 1012 to pass through, as shown in fig. 1. It should be understood that "perpendicular" herein means substantially perpendicular, e.g., a light ray having an angle in the range of 85 ° to 95 ° with respect to the first surface 1011 or the second surface 1012 is included in light perpendicular to the first surface 1011 or the second surface 1012. This arrangement allows the entire transparent body 101, including the microstructures 102, to be transparent when the light guiding layer 100 is viewed in a direction perpendicular to the light guiding layer 100.

This allows, in some embodiments, transparent body 101 to be coupled to a viewable area of vehicle glazing 200 so as not to affect the view of vehicle glazing 200. The microstructure portion 102 can diffusely reflect, scatter and/or refract the light source light L1 propagating to the microstructure portion 102 to a predetermined region of at least one of the first surface 1011 or the second surface 1012 to emit the light source light L1 at the predetermined region, while satisfying the above requirement of transparency.

Fig. 1 shows a case where light source light L1 propagating to the microstructure portion 102 is diffusely reflected. As can be seen from fig. 1, when light source light L1 is irradiated at the microstructure portion 102 disposed at the first surface 1011, the microstructure portion 102 can diffusely reflect the light source light L1 to a predetermined region of the second surface 1012, and vice versa. Alternatively or additionally, in some embodiments, when light source light L1 impinges at microstructure 102 disposed at first surface 1011, microstructure 102 is also capable of scattering or refracting light source light L1 to and out of a predetermined region of first surface 1011.

The lighting effect can be further enhanced by appropriately providing the microstructure portion 102. For example, when diffuse reflection is required to cause the light source light L1 to exit from a predetermined region of the second surface 1012, the microstructure portion 102 on the first surface 1011 may be processed into a shape or structure that is more favorable for providing diffuse reflection. Alternatively or additionally, when it is desired to use scattering to cause the light source light L1 to exit from a predetermined region of the second surface 1012, the microstructures 102 on the second surface 1012 can be shaped or structured to better facilitate providing the scattering.

Further, the illumination system using the light guide layer 100 disposed on the vehicle glass 200 can flexibly adjust the shape of the light emitting region by adjusting the shape of the predetermined region. For example, in some embodiments, the predetermined area may be the entire surface of first surface 1011 and/or second surface 1012 of light guiding layer 100, which may be achieved by providing microstructures 102 on the entire surface of first surface 1011 and/or second surface 1012. In some alternative embodiments, the predetermined area may also be a portion of the surface of the first surface 1011 and/or the second surface 1012. For example, the predetermined area may include one or more regular shapes and figures having various irregular shapes. In some embodiments, regular shapes may include, but are not limited to, circles, ovals, triangles, rectangles, pentagons, hexagons, octagons, and the like. These shapes can be separate or combined together to form a variety of different patterns. In some embodiments, the predetermined area may also have irregular shapes of various figures, such as an outline of an animal, tool, plant, logo, etc. This allows for more flexibility in the way in which the light guide layer 100 is used for illumination, thereby further enhancing the user experience.

In some embodiments, light guiding layer 100 may be cuttable, meaning that light guiding layer 100, if cut, does not affect the diffuse reflection, scattering or refraction of light source light L1 by microstructures 102. For example, a user or an automobile manufacturer may cut the required size of light guide layer 100 as desired according to the size of vehicle glass 200. This enables the light guiding layer 100 to be manufactured in rolls, allowing the light guiding layer 100 to be manufactured more easily. Furthermore, providing light guiding layer 100 to be cuttable may enable light guiding layer 100 to be applied to different specifications of vehicle glass 200, thereby improving the applicability of light guiding layer 100.

In some embodiments, the above-described regular or any other irregular shape of the predetermined area may be realized by a regular or irregular-shaped light diffusion portion. For example, taking the case where the light diffusion portion includes the microstructure portion 102 as an example, the microstructure portion 102 may be provided to have a desired shape, so that the light source light L1 propagating to the microstructure portion 102 is emitted in the shape of the microstructure portion 102 after being diffusely reflected, scattered, or refracted by the microstructure portion 102, thereby realizing the shape of the predetermined region, that is, the shape of the light emitting region.

It should be understood that the above embodiments describing the light diffusion portion as having any of various suitable shapes or structures with respect to the microstructure portion 102 are only illustrative and are not intended to limit the scope of the present disclosure. In addition to being formed in the light guiding layer, the light diffusing portion may also be formed in the vehicle glass, and the microstructure portion 102 may also be formed on the glass. Further, it is also applicable in the case where the light diffusion portion may also include other structures (for example, suspended particles or an ink portion to be mentioned later). That is, the layout of the suspended particles and the morphology of the ink portion, which will be mentioned later, may have a predetermined shape or structure so that light is emitted from a predetermined area of the corresponding shape or image, which will not be described in detail later.

In some embodiments, the dimensions of the microstructures 102 are micro-scale or nano-scale. For example, the size of the microstructures 102 may be in the range of several nanometers to several hundred nanometers. In some alternative embodiments, microstructures 102 can also have a range from a few microns to a few hundred microns. The wide range of dimensions of microstructures 102 may allow for a wider range of applications for light guiding layer 100.

In some embodiments, microstructures 102 can be formed on transparent body 101 by additive and/or subtractive means. For example, the microstructures 102 can be protrusions formed on at least one of the first surface 1011 and the second surface 1012 by additive means. In some embodiments, the additive means may comprise means for UV glue curing. The additive manner allows the microstructure portion 102 and the transparent body 101 to be made of different materials and coupled together, thereby facilitating the diversification of the arrangement of the microstructure portion 102. For example, a photoresist is prepared, a predetermined pattern is lithographically etched on the photoresist, a UV paste, e.g., a liquid, is coated on the etched pattern, a matrix material, e.g., polyethylene terephthalate (PET) or Polycarbonate (PC), is applied on the liquid UV paste, and then UV curing is performed, and the photoresist having the predetermined pattern lithographically etched is removed. Microstructures 102 are formed on transparent body 101. Of course, in some embodiments, in an additive manufacturing manner, the microstructure portion 102 may also be integrally formed on the transparent body 101 using the same material as the transparent body 101 at the same time of manufacturing the transparent body 101.

Alternatively or additionally, the microstructure portion 102 may also include a recess formed on at least one of the first surface 1011 and the second surface 1012 by a material reduction manner. In some embodiments, the means of reducing includes, but is not limited to: machining, chemical etching or photolithography. For example, after the transparent body 101 is formed, the microstructure portion 102 may be formed on a designated area of the first surface 1011 and/or the second surface 1012 of the transparent body 101 by photolithography. This versatile manufacturing approach, whether additive or subtractive, may enable light guiding layer 100 to be more easily manufactured, allowing light guiding layer 100 to be produced in a cost-effective manner.

The transparent body 101, on which the microstructure portion 102 is arranged, may be arranged in any suitable manner in the vehicle glazing 200. For example, the transparent body 101 may be disposed directly on the surface of the vehicle glass 200, as shown in fig. 2. This arrangement is suitable for the case where the vehicle glass 200 is made of a single glass layer. Of course, it should be understood that this arrangement is equally applicable to the case where the vehicle glass 200 is made of laminated glass. In case the vehicle glazing 200 is made of laminated glass, the transparent body 101 may be arranged between the laminated glass, e.g. between two glass layers in the laminated glass, as will be further parameters below.

In some alternative embodiments, the vehicle glass 200 includes a glass body 201, and the microstructure portion 102 may be formed on at least one surface of the glass body 201. The microstructures 102 are transparent when the light source is off. Alternatively, the vehicle glass 200 includes a laminated glass, for example, a glass layer facing the vehicle interior (which will be referred to as a first glass layer 2011 hereinafter) and a glass layer facing the vehicle exterior (which will be referred to as a second glass layer 2012 hereinafter). In some embodiments, the microstructures 102 are formed on the first surface 2013 of the first glass layer 2011 facing the outside of the vehicle, as shown in fig. 3, which can further improve the lighting effect. Although not shown in fig. 3, the microstructure portion 102 may also be formed on the second surface 2014 of the first glass layer 2011 that faces the vehicle interior. Further, the microstructure portion 102 may also be formed on the outer surface of the second glass layer 2012 facing the outside of the vehicle, or on the inner surface of the second glass layer 2012 facing the inside of the vehicle.

Fig. 4 shows another embodiment of a light guiding layer 100. In the embodiment shown in fig. 4, the light diffusion portion may include suspended particles 103 disposed in a transparent body 101. The suspended particles 103 can diffusely reflect, scatter and/or refract the light source light L1 propagating to the suspended particles 103 to a predetermined region of at least one of the first surface 1011 or the second surface 1012 to cause the light source light L1 to exit from the predetermined region. As mentioned above, the layout or arrangement of the suspended particles 103 in the transparent body 101 corresponds to the predetermined shape of the predetermined area. That is, the predetermined shape of the predetermined region is thus set by appropriately setting the layout of the suspended particles 103 in the transparent body 101. In some embodiments, the photoconductive layer 100 containing suspended particles 103 can be extruded.

In some embodiments, the suspended particles 103 may be arranged uniformly or non-uniformly with some predetermined regularity in the transparent body 101. For example, in some embodiments, the suspended particles 103 may increase from one edge of the transparent body 101 to another edge, thereby providing a gradual change in the brightness of the light emitted from the predetermined area. That is, in some embodiments, the density of suspended particles 103 in transparent body 101 may affect the brightness of light diffusely reflected, scattered, and/or refracted therethrough. Factors that may affect the brightness of light include, in addition to the density of the suspended particles, the transparency, shape, size, composition, and surface roughness of the suspended particles 103.

In some embodiments, suspended particles 103 may be transparent, translucent, or even opaque. In embodiments where suspended particles 103 are transparent or translucent particles, the refractive index of suspended particles 103 is different from the refractive index of transparent body 101, which can ensure good illumination. In some embodiments, the size, shape, density, composition, and surface roughness of suspended particles 103 may be selected to promote a lighting effect. For example, to ensure transparency of the light guiding layer 100, the size and density of the suspended particles cannot be too high. In this case, in order to secure the illumination effect, the suspended particle 103 may be shaped to promote diffuse reflection, scattering and/or refraction of the light source light L1 arriving at the suspended particle 103 toward a predetermined region. The shape of the suspended particles 103 includes, but is not limited to: spherical, ellipsoidal, cubic, polygonal or rhombohedral.

The transparent body 101 including the suspended particles 103 may also be arranged in any suitable manner in the vehicle glazing 200. For example, in some embodiments, the transparent body 101 may be a film made of at least one of polyethylene terephthalate (PET), Polycarbonate (PC), polymethyl methacrylate (PMMA), thermoplastic polyurethane elastomer (TPU), terephthalic acid (TPA), or any other suitable material having no adhesive effect. The transparent body 101 in the form of a film may be arranged between two glass layers of a laminated glass by means of an intermediate layer 202, such as an adhesive layer, as shown in fig. 5. In some alternative embodiments, the transparent body 101 in the form of a film may also be arranged on the surface of the vehicle glazing via an intermediate layer 202.

In some embodiments, the transparent body 101 may be an adhesive layer made of at least one of polyvinyl butyral (PVB), Ethylene Vinyl Acetate (EVA), polyolefin elastomer (POE), or any other suitable material with adhesive effect. For example, the transparent body 101 in the form of the adhesive layer may be arranged between two glass layers of a laminated glass, as shown in fig. 6. In such an embodiment, light guide layer 100 can also bond two glass layers while serving as illumination, thereby further reducing the thickness of the vehicle glazing.

In some embodiments, transparent body 101 including suspended particles 103 may be applied in the form of a coating inside vehicle glazing 200 or on the surface of the vehicle glazing. For example, in some embodiments, during the manufacturing process of the vehicle glass 200, the transparent body 101 may be coated on the outer surface of the first glass layer 2011 facing the interior of the vehicle and then bonded to the second glass layer 2012 through the interlayer 202, as shown in fig. 7. In some alternative embodiments, the transparent body 101 including suspended particles 103 may be applied as a coating on the surface of a vehicle glazing 200 (including laminated glass or a single ply of glass), as shown in fig. 8. This diversified arrangement enables the light guide layer 100 to be more easily applied to the vehicle glass 200 to achieve the effect of illumination.

In some embodiments, the suspended particles 103 may also be formed directly in the glass body 101 to diffusely reflect, scatter, or refract light source light entering the glass body 101 to achieve illumination of the glass body 101 over a predetermined area. This arrangement further reduces the number of layers of the vehicle glass 200, making the vehicle glass 200 thinner and easier to manufacture.

Alternatively or additionally, in some embodiments, the light diffusing portion may include an ink portion 104 disposed on at least one of the first surface 2013 and the second surface 2014 of the glass body 201, as shown in fig. 9. The printing ink is prepared by grinding varnish as a base material and adding pigment, and the coating is in magneto-optical color after being dried and is hard to coat. The glass body 201 including the ink portion 104 may also be disposed in the vehicle glass 200 in any suitable manner. For example, in some embodiments, the glass body 201 may be a first glass layer 2011 facing the interior of the vehicle in laminated glass. In such embodiments, the ink portion 104 may be disposed on the first surface 2013 or the second surface 2014 of the first glass layer 2011 by way of plating, coating, or the like.

In some alternative embodiments, the transparent body 101 may also be an intermediate layer of laminated glass for bonding two glass layers. That is, in such embodiments, the ink portion 104 may be disposed on either surface of the intermediate layer. To ensure the lighting effect, in some embodiments, the ink portion 104 may be disposed on a surface of the intermediate layer facing the interior of the automobile. In some alternative embodiments, the transparent body 101 may also be manufactured in the form of a film disposed inside the vehicle glass 200 or on the surface of the vehicle glass 200.

In some embodiments, ink portion 103 has anti-stick properties that prevent sticking to the uncoated/applied glass of two sheets of glass during bending, prevent sticking to process equipment, prevent sticking to molds, and/or prevent sticking to conveyor belts, etc.

In some embodiments, the ink portion 104 is compatible with bending temperatures, such as temperatures above 600 degrees celsius.

In some embodiments, the ink portion has a value of L in chromaticity space CIELAB of greater than 58, e.g., in reflective mode. As will be further explained below.

To further enhance the lighting effect, in some embodiments, light guide layer 100 is made wrinkle resistant, taking into account the special case of vehicle glazing 200. That is, the light guide layer 100 is configured not to be wrinkled when applied to the vehicle glass 200 having a curved shape so as not to affect the diffuse reflection, scattering or refraction of light rays by the light diffusion portion. Alternatively or additionally, light guiding layer 100 may also be configured to be malleable. This means that the light guiding layer 100 can be extended to fit, for example, the shape of the applied vehicle glazing 200, which may reduce the requirements on the dimensional accuracy of the manufacture and/or cutting of the light guiding layer 100, thereby improving efficiency. Furthermore, the stretchability also means that even if the light guide layer 100 is stretched when being assembled to the vehicle glazing 200, the diffuse reflection, scattering, or refraction of the light source light L1 by the light diffusing portion is not affected, thereby ensuring the lighting effect. The wrinkle-resistant and extensible properties of light guide layer 100 may be achieved by appropriate material selection. For example, in some embodiments, lightguide layer 100 may be made of a PET material with good wrinkle resistance and ductile properties.

Alternatively or additionally, in some embodiments, transparent body 101 may also be pre-fabricated to match the curvature of vehicle glass 200 according to the curvature of vehicle glass 200. For example, when mass production is performed on the vehicle glass 200 with a predetermined curvature, prefabricating the transparent body 101 with a curvature matching the curvature of the vehicle glass 200 can further reduce the risk of wrinkles that may be caused by different curvatures, thereby improving the adaptability of the light guiding layer 100 to the vehicle glass 200 to thereby ensure the lighting effect.

In some alternative embodiments, the transparent body 101 is deformable such that the change of the direction of the light source light L1 by the light diffusing portion is not affected if the transparent body 101 is deformed to have a curvature matching the curvature of the vehicle glass 200. That is, in this case, there may be no requirement for the curvature of the transparent body 101, and may be applied to the vehicle glass 200 of an arbitrary curvature, thereby improving the applicability of the light guiding layer 100.

A vehicle glazing 200 and a vehicle interior lighting system 300 including the vehicle glazing 200 are also provided according to embodiments of the present disclosure. Fig. 10-14 illustrate various embodiments of a vehicle glazing 200 and a vehicle interior lighting system 300 including the vehicle glazing 200 according to embodiments of the disclosure. As shown in fig. 10 to 14, a vehicle glass 200 according to an embodiment of the present disclosure may include a glass body 201 and a light guiding layer 100 according to the above description. The vehicle interior lighting system 300 includes a light source 301 in addition to the vehicle glass 200. The light source 301 mentioned herein may be a direct light source 301, and may also refer to a light source 301 that radiates light outward through light. The direct light source 301 refers to a light source 301 that directly radiates light outward after being turned on, such as a light emitting diode or the like. Embodiments of the vehicle glass 200 and the vehicle interior lighting system 300 will be described below mainly taking the light diffusion portion as the microstructure portion 102 as an example. It should be understood that embodiments in which the light diffusion portion is other forms such as suspended particles or an ink portion are also similar and will not be described separately below.

As shown in fig. 10 and 11, as already mentioned in the foregoing, in some embodiments the light guiding layer 100 may be arranged on the surface of the glass body 201 by an intermediate layer 202. In some embodiments, intermediate layer 202 may include a bonding layer that facilitates attaching light guiding layer 100 to a surface of glass body 201. The interlayer 202 may be made of polyvinyl butyral (PVB) or Ethylene Vinyl Acetate (EVA) to enable the vehicle glass 200 to be manufactured in a cost effective manner. In addition to being able to bond light guiding layer 100 and glass body 201, in some embodiments, intermediate layer 202 may also include layers having other functions, including but not limited to: an electrochromic transparency layer, an electrochromic layer, a heat reflective layer, a low-emissivity layer, or the like, thereby further enriching the functions of the vehicle glass and improving the lighting effect.

In some embodiments, when the microstructures 102 are disposed adjacent to a surface of the intermediate layer 202, the optical refractive index of the intermediate layer 202 is different from the optical refractive index of the microstructures 102, which can further enhance the illumination effect. This difference in optical refractive index may be achieved by selecting an appropriate material for the intermediate layer 202 and/or the microstructures 102. For example, the microstructures 102 and the intermediate layer 202 may be made of materials having different optical refractive indices, respectively.

It should be noted that, in the embodiment where the light diffusion portion is the suspended particles 103, there is no limitation on the refractive index of the suspended particles 103 and the refractive index of the adjacent intermediate layer 202, that is, they may be the same or different. As mentioned above, for the suspended particles 103, the different refractive index of the suspended particles 103 from the refractive index of the transparent body 101 in which they are located can improve the illumination effect.

In the case where the light guiding layer 100 is disposed on the surface of the glass body 201 through the intermediate layer 202, in some embodiments, the vehicle glass 200 may further include a protective layer 203 disposed on the surface of the light guiding layer 100 away from the glass body 201, as shown in fig. 10 and 11. The protective layer 203 can protect the light guide layer 100 from being scratched and damaged by external foreign matters, so as to ensure the integrity of the microstructure portion 102 and the light transmittance of the light path, thereby further ensuring the illumination effect. In some embodiments, the protective layer 203 may be made of a material with high light transmittance, for example, the protective layer 203 may be made of a material with light transmittance higher than 95% (e.g., 98%).

It should be noted that, including the protective layer 203, media (including, but not limited to, the first or second glass layer, the transparent body 101, the intermediate layer 202, etc.) included in the light path through which the light diffusely reflected, scattered, or refracted by the light diffusion portion passes until the light emitted from the vehicle glass can be made of a material having a light transmittance higher than a predetermined threshold value, so as to further improve the illumination effect.

Fig. 10 and 11 also show several exemplary embodiments of the arrangement positions of the light sources 301 in the vehicle interior lighting system 300 in case the light guiding layer 100 is arranged on the surface of the glass body 201 by the intermediate layer 202. Although the drawings only illustrate possible arrangements of the light sources 301 by taking the microstructure portion 102 as the light diffusion portion, it should be understood that, for the embodiment in which the light diffusion portion includes the suspended particles and/or the ink portion, the arrangement of the light sources 301 is also similar, and the following description is not repeated separately.

As shown in fig. 10, in some embodiments, the light source 301 may be disposed proximate at least a portion of the vehicle glazing 200. For example, in some embodiments, where the light guide layer 100 is applied to a skylight glass, the light sources 301 may be disposed in a non-visible region around the skylight glass. Non-viewable area refers to an area of the vehicle glazing 200 that is located inside a vehicle headliner or other opaque structure. In some embodiments, the non-visible region may also refer to an opaque region of the vehicle glazing 200 itself. The non-visible area is generally disposed around the vehicle glass 200.

Taking a skylight glass as an example, the light sources 301 may be arranged in a non-visible area around the skylight glass, including that the light sources 301 may be continuous light sources 301 or linear light sources 301 arranged at the edge of the skylight glass, or point light sources 301, and the light sources 301 may be close to the edge of the skylight glass or at a predetermined distance from the edge of the skylight glass. The continuous light source 301 refers to a continuous, uninterrupted light source 301 disposed at least one edge of the vehicle glass 200, and the point light source 301 refers to a point light source 301 disposed at a distance in the vicinity of the vehicle glass 200. In order to increase the lighting effect, it is advantageous to arrange the light source 301 close to the edge of the vehicle glazing 200. On the one hand, this enables more light source light L1 to enter and propagate inside the transparent body 101, thereby improving the lighting effect. On the other hand, this arrangement may allow the light source 301 and the vehicle glass 200 to be manufactured as an integral structure to facilitate assembly of the vehicle glass 200 more.

Of course, it is advantageous to customize the vehicle and the vehicle glass 200 to dispose the light source 301 at a predetermined distance from the edge of the sunroof glass. For example, in some embodiments, the vehicle glazing 200 and its surrounding light sources 301 may be separately assembled and installed and provide a variety of different configurations through reserved interfaces and/or light paths. For example, some low-profile vehicles may employ a conventional vehicle glazing 200 without a light guiding layer 100. The user may choose to add the light guide layer 100 to a low-profile vehicle, or a vehicle glazing 200 with the light guide layer 100, while placing the light sources 301 in reserved locations (e.g., the area of the ceiling near the sunroof glass) to upgrade the vehicle interior lighting system to a vehicle interior lighting system 300 that can be illuminated with the vehicle glazing 200. In this case, light source 301 is arranged to enable vehicle glass 200 to achieve interior lighting through light guide layer 100 by shining light source light L1 into transparent body 101 through an appropriate interface and/or light pathway.

It should be understood that the arrangement of the light source 301 described above with respect to the vehicle glass 200 is merely illustrative and is not intended to limit the scope of the present disclosure. Any other suitable arrangement or configuration is possible, for example, in some alternative embodiments, the light source 301 may also be disposed in the vehicle glazing 200, as shown in fig. 3. In some embodiments, the light source 301 may be in the form of a bezel or sub-assembly.

Fig. 11 shows an embodiment in which the light source 301 is arranged in the glass body 201. In such an embodiment, the glass body 201 may be provided with a light source hole for receiving at least a portion of the light source 301. The integration of the light source 301 into the glass body 201 can further improve the integration of the vehicle glass 200, thereby facilitating the assembly of the vehicle glass 200 to a vehicle.

In some embodiments, the light source holes may be machined to accommodate the shape of the light source 301. For example, in some embodiments, the light source aperture may have an elongated shape to accommodate a continuous light source 301. In some alternative embodiments, the light source holes may also be circular holes that accommodate the point light sources 301. The circular shape here refers to the shape of the light source hole in a cross section parallel to the surface of the glass body 201. In addition to being circular, the shape of the light source hole in a cross section parallel to the surface of the glass body 201 includes, but is not limited to: circular, oval, elongated, triangular, rectangular, pentagonal, hexagonal, octagonal, and the like.

Further, in some embodiments, the shape of the cross-section of the light source hole in a direction perpendicular to the surface of the glass body 201 may be rectangular, as shown by the solid line in fig. 11. This arrangement further facilitates the manufacture of the light source aperture and thus the entire vehicle glazing 200. In some alternative embodiments, the shape of the cross-section of the light source holes in a direction perpendicular to the surface of the glass body 201 may be convex, as shown by the dashed line of the light source holes on the left side in fig. 11. Alternatively or additionally, in some embodiments, the shape of the cross-section of the light source holes in a direction perpendicular to the surface of the glass body 201 may be concave, e.g. concave elliptical, as shown by the dashed line of the light source holes on the right side in fig. 11, concave and convex, e.g. convex elliptical, light source holes may facilitate the propagation of the light source light L1 into the interior of the transparent body 101, e.g. with the function of some lenses. In some alternative embodiments, the shape of the cross-section of the light source holes in a direction perpendicular to the surface of the glass body 201 may also be trapezoidal. That is, the opening area of the light source holes is gradually increased or decreased from one surface of the glass to the other surface, which arrangement is more advantageous for the design and assembly of the light source 301.

Fig. 10 and 11 show a case where a vehicle glass 200 used in a vehicle interior lighting system 300 is arranged on a surface of a glass body 201 using a light guide layer 100. Similarly, fig. 12 to 14 show a case where the light guide layer 100 is disposed inside the vehicle glass 200. In the embodiment shown in fig. 12 to 14, the glass body 201 is a common case including at least two glass layers. For convenience of description, the concept of the present disclosure will be described by taking an example in which the glass body 201 has two glass layers (hereinafter, referred to as a first glass layer 2011 and a second glass layer 2012, respectively). It should be understood that the case of more than two glass layers is similar and will not be described in detail below.

As shown in fig. 12 and 14, in some embodiments, light guiding layer 100 is disposed between first glass layer 2011 and second glass layer 2012 via an intermediate layer 202. Similarly, intermediate layer 202 may be a bonding layer that facilitates attaching light guiding layer 100 to the inner surfaces of first glass layer 2011 and second glass layer 2012 as described hereinabove. The interlayer 202 may be made of polyvinyl butyral (PVB) or Ethylene Vinyl Acetate (EVA) to enable the vehicle glass 200 to be manufactured in a cost effective manner.

Similar to the case where light guiding layer 100 is arranged on the surface of glass body 201, in some embodiments, the optical refractive index of microstructures 102 is different from the optical refractive index of intermediate layer 202 adjacent to microstructures 102, which can further improve the lighting effect. This difference in optical refractive index may be achieved by selecting an appropriate material for the intermediate layer 202 and/or the microstructures 102. For example, the microstructures 102 and the intermediate layer 202 may be made of materials having different optical refractive indices.

In case the light guiding layer 100 is arranged between the first glass layer 2011 and the second glass layer 2012, the light source 301 may also have a variety of arrangements. As shown in fig. 12 and 13, in some embodiments, the light source 301 may be disposed proximate at least a portion of the vehicle glazing 200. For example, in some embodiments, the light sources 301 may be disposed around the entire vehicle glazing 200, e.g., in a non-viewable area, as shown in fig. 12. This arrangement facilitates the integrated manufacture of the vehicle glass 200 with the light guide layer 100 and the assembly of such a vehicle glass 200 into a vehicle. Similarly, in some embodiments, the light source 301 may include a continuous light source 301 or a point light source 301, and may be proximate to the edge of the vehicle glass 200 or a predetermined distance from the edge of the vehicle glass 200.

In some embodiments, the light source 301 may also be disposed only on one of the glass layers of the vehicle glass 200, for example, around the first glass layer 2011, as shown in fig. 13. This arrangement is particularly suitable when the two glass layers consist of glasses of different light transmission. In such embodiments, second glass layer 2012 is larger than first glass layer 2011 and light source 301 is disposed in a region where the two are different. This case may include that the size of the second glass layer 2012 is generally the same as the size of the first glass layer 2011, but is larger than the size of the first glass layer 2011 only in a local area, except that the size of the second glass layer 2012 is generally larger than the size of the first glass layer 2011.

For example, in some embodiments, first glass layer 2011 may include a plurality of recessed areas disposed at an edge. It is apparent that the size of the second glass layer 2012 is larger than that of the first glass layer 2011 at these recessed area portions. Light sources 301 may be arranged in these recessed areas. This arrangement can further improve the integration of the vehicle glass 200.

In the embodiment described above in which light sources 301 are arranged only around first glass layer 2011 of vehicle glass 200, light guide layer 100 may be the same size and shape as first glass layer 2011. Of course, in some alternative embodiments, light guiding layer 100 may also be the same size and shape as second glass layer 2012. Neither case affects the lighting effect of the light guiding layer 100, thereby making the arrangement of the light guiding layer 100 more flexible.

In some alternative embodiments, the light source 301 may also be disposed in at least one of the first glass layer 2011 and the second glass layer 2012. Fig. 14 shows an embodiment in which the light source 301 is arranged in a first glass layer 2011. As shown in fig. 14, in such embodiments, first glass layer 2011 and/or second glass layer 2012 may be provided with light source apertures for receiving at least a portion of light sources 301. Integrating the light source 301 in the first glass layer 2011 and/or the second glass layer 2012 can further improve the integration of the vehicle glass 200, thereby facilitating the assembly of the vehicle glass 200 to a vehicle.

Similar to the embodiment shown in fig. 11, in some embodiments, the light source holes in first glass layer 2011 and/or second glass layer 2012 can also be machined to accommodate the shape of light source 301. For example, in some embodiments, the shape of the light source aperture in a cross-section parallel to the surface of the glass body 201 may include, but is not limited to: circular, oval, elongated, triangular, rectangular, pentagonal, hexagonal, octagonal, and the like.

Also similar to the embodiment shown in fig. 11, the shape of the cross-section of the light source holes in the first glass layer 2011 and/or the second glass layer 2012 perpendicular to the surface of the glass body 201 may be rectangular to facilitate the fabrication of the light source holes or even the first and second glass layers 2011 and 2012. In some embodiments, the shape of the light source holes in cross-section perpendicular to the surface of the glass body 201 may also be concave or convex, facilitating the propagation of light source light L1 into the interior of the transparent body 101. In some alternative embodiments, the shape of the cross-section of the light source hole in a direction perpendicular to the surface of the glass body 201 may also be trapezoidal, thereby facilitating the design and assembly of the light source 301.

For example, in some embodiments, as shown by the dashed lines in fig. 14, the open area of the light source holes in the first glass layer 2011 gradually increases in a direction toward the second glass layer 2012. Correspondingly, the fitting into it can have a conical shape matching it. This arrangement prevents the light source 301 from coming out of the light source hole after being fitted into the first glass layer 2011, thereby ensuring that the light source 301 can be fitted into the light source hole more firmly.

It was mentioned in the foregoing that the vehicle glazing may further comprise a heat reflective layer 204 and/or a low emissivity layer 205. The heat reflective layer 204 may be made of a suitable material (e.g., silver) for improving thermal comfort within the vehicle by reflecting light and/or heat radiation, thereby providing a thermal comfort function. The low-emissivity layer 205 is a film-system product composed of a plurality of layers of metals or other compounds. The low-radiation layer 205 has high transmittance of visible light and high reflectance of middle and far infrared rays, and has excellent heat insulating effect and good light transmittance.

The heat reflective layer 204 and/or the low emissivity layer 205 may be disposed in any suitable manner in the various vehicle glazing arrangements previously mentioned. Some exemplary embodiments of the heat reflective layer 204 and/or the low emissivity layer 205 disposed in the vehicle glazing will be described below in conjunction with fig. 15-19. In some embodiments, the heat reflective layer 204 and/or the low emissivity layer 205 may be applied in any form of a film, plating, or coating into or onto the surface of the vehicle glazing. Fig. 15 shows an embodiment in which the light guiding layer 100 is arranged between a first glass layer 2011 and a second glass layer 2012 of the vehicle glazing 200. In such embodiments, the thermally reflective layer 204 may be disposed in the form of a thin film between two glass layers via the intermediate layer 202, for example, on a side of the light guide layer 100 adjacent to the second glass layer 2012.

In some alternative embodiments, the heat reflective layer 204 may also be disposed as a plating or coating on a surface of either of the first glass layer 2011 and the second glass layer 2012, as shown in fig. 16 and 17. Fig. 16 illustrates an embodiment in which the heat reflective layer 204 is applied as a coating or coating on the outer surface of the first glass layer 2011 and then bonded to the second glass layer 2012. Fig. 17 illustrates an embodiment of the heat reflective layer 204 after being applied as a plating or coating to the outer surface of the second glass layer 2012, and then bonded to the first glass layer 2011.

Fig. 18 and 19 illustrate some exemplary arrangements of the low-e layer 205 in the glass of a vehicle. As shown in fig. 18, the low-emissivity layer 205 may be applied in the form of a coating to the outside of the inner surface of the first glass layer 2011 facing the vehicle interior. Ink portion 103 may then be applied on the outside of low-e layer 205. In the case where the ink portion 103 may be applied outside the low-emissivity layer 205, the ink portion 103 is compatible with the material of the low-emissivity layer 205. Compatibility means that no reaction (or very little acceptable reaction) can occur between the ink portion 103 and the adjacent low-e layer 205 and that the bonding force between the ink portion 103 and the low-e layer 205 is not affected. Of course, this is merely illustrative and any other suitable arrangement is possible. For example, in some alternative embodiments, as shown in fig. 19, the ink portion 103 and the low-emissivity layer 205 may be applied on both surfaces of the first glass layer 2011, respectively. That is, the ink portion 103 may be disposed outside the vehicle glass and inside the vehicle glass. The outer portion herein is an inner portion of the vehicle glass, and includes an outer portion facing the inside of the vehicle and an outer portion facing the outside of the vehicle. The interior of the vehicle glass means that in the case where the vehicle glass is a laminated glass, the ink portion 103 may be disposed between the laminated glass.

In some embodiments, the ink portion 104 is compatible with bending temperatures, such as temperatures above 600 degrees celsius.

In some embodiments, the ink portion has a value of L in chromaticity space CIELab of greater than 58, e.g., in reflective mode. The Lab color space is composed of three elements, namely illuminance L and a and b related to colors. L denotes the illuminance, corresponding to the brightness, a denotes the range from magenta to green, and b denotes the range from yellow to blue. The range of L is from 0 to 100, and when L is 50, it corresponds to 50% black. A better lighting effect can be obtained by reasonably selecting L of the ink portion.

In some embodiments, ink portion 103 is also suitably selected to have anti-adhesion properties. The anti-adhesion property can prevent the ink portion 103 from being adhered to other glass layers where the ink portion 103 is not provided and/or a mold or a conveyor belt that manufactures the vehicle glass 200, thereby enabling the vehicle glass 200 to be manufactured more easily.

Further, in some embodiments, the color and transparency of ink portion 103 may also be appropriately selected to accommodate various desired conditions. For example, in some embodiments, ink portion 103 may be black, white, colored, clear-to-white, colored translucent, or clear-to-translucent. For example, in a case where the vehicle glass 200 is required to realize the refraction illumination, the color of the ink portion 103 may be selected to be colorless and transparent, thereby improving the illumination effect.

It should be understood that several exemplary embodiments of the heat reflective layer 204 and the low emissivity layer 205 are depicted in simplified schematic form in fig. 15-19. These several embodiments are not exhaustive, and the heat reflective layer 204 and the low emissivity layer 205 may be disposed in any suitable manner within the vehicle glazing 200. The heat reflective layer 204 and the low emissivity layer 205 of fig. 15-19 are interchangeable. Further, it should be understood that other layers or structures of the vehicle glazing 200 are not shown in fig. 15-19 for ease of illustration of the heat reflective layer 204 and the low emissivity layer 205.

It is to be understood that the above detailed embodiments of the disclosure are merely illustrative of or explaining the principles of the disclosure and are not limiting of the disclosure. Therefore, any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure. Also, it is intended that the appended claims cover all such changes and modifications that fall within the true scope and range of equivalents of the claims.