CN113253507A

CN113253507A - Light-adjusting glass

Info

Publication number: CN113253507A
Application number: CN202110671931.4A
Authority: CN
Inventors: 李展; 王春雷; 翟德深; 巨小倩; 王瑛; 张思凯; 王昌银; 陈娟; 梁鹏; 车春城; 于静
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Sensor Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Sensor Technology Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-08-13

Abstract

The disclosure provides dimming glass, and belongs to the technical field of display glass. The dimming glass of the present disclosure includes: the heat insulation glass comprises first protective glass and second protective glass positioned on the inner side of the first protective glass, wherein a heat insulation space is formed between the first protective glass and the second protective glass; a dimming component disposed between the first protective glass and the second protective glass, the dimming component configured to adjust a transmittance of light; and the first reflecting film is arranged on one side of the first protective glass close to the heat insulation space, and is configured to reflect infrared light and transmit visible light.

Description

Light-adjusting glass

Technical Field

The disclosure belongs to the technical field of display glass, and particularly relates to dimming glass.

Background

At present, the dimming glass is applied to the fields of buildings, vehicles and the like, and the dimming glass can change the light transmittance of a window, so that the window can be changed between a dark state and a bright state.

However, the existing light control glass is formed by mixing three dichroic dyes of red, yellow and blue with mother liquid crystal, and can adjust visible light penetrating through an outer window, but near infrared light can penetrate, and the energy of the near infrared light accounts for 50% of the total energy of solar energy, and the dye liquid crystal light control window which can penetrate through the near infrared light is easy to cause indoor temperature rise when being irradiated by sunlight, increases indoor air conditioning load, and has poor energy-saving effect; meanwhile, in the lamination process of the dimming glass and the toughened glass, the problems of dimming glass splintering, local black spots and the like caused by uneven stress exist.

Disclosure of Invention

The present disclosure is directed to at least one of the technical problems occurring in the prior art, and provides a light control glass.

In a first aspect, embodiments of the present disclosure provide a light control glass, including:

the heat insulation glass comprises first protective glass and second protective glass positioned on the inner side of the first protective glass, wherein a heat insulation space is formed between the first protective glass and the second protective glass;

a dimming component disposed between the first protective glass and the second protective glass, the dimming component configured to adjust a transmittance of light;

and the first reflecting film is arranged on one side of the first protective glass close to the heat insulation space, and is configured to reflect infrared light and transmit visible light.

Optionally, the dimming component comprises: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is arranged between the first substrate and the second substrate; the liquid crystal layer is used for overturning under the control of an electric field generated between the first substrate and the second substrate so as to control the transmittance of light.

Optionally, the dimming component is fixed on one side of the second protective glass close to the first protective glass through a first bonding layer, the material of the first bonding layer comprises polyvinyl butyral doped with infrared reflective particles, and the infrared reflective particles comprise one or more of nano ITO particles, cesium tungsten bronze particles and rare earth particles.

Optionally, the light control glass further comprises a second reflective film, the second reflective film is disposed on a side of the second protective glass away from the heat insulation space, and the second reflective film is configured to reflect infrared light and transmit visible light.

Optionally, the second protective glass is vacuum glass, the vacuum glass includes a third protective glass, a fourth protective glass, and a third reflective film, the fourth protective glass is disposed on a side of the third protective glass away from the first protective glass, the third reflective film is disposed on a side of the third protective glass away from the first protective glass, and the third reflective film is configured to reflect infrared light and transmit visible light.

Optionally, the light control glass further comprises a fifth protective glass, the fifth protective glass is arranged on one side, away from the heat insulation space, of the second protective glass, and the fifth protective glass and the second protective glass are fixed through a sealing structure.

Optionally, the light control glass further comprises a low-emissivity fourth reflective film, the fourth reflective film is disposed on a side of the second protective glass close to the fifth protective glass, and the fourth reflective film is configured to reflect infrared light and transmit visible light.

Optionally, the dimming assembly is fixedly arranged between the first protective glass and the second protective glass through a spacer.

Optionally, the light control glass further comprises a fifth reflective film, the fifth reflective film is disposed on a side of the light control assembly close to the second protective glass, and the fifth reflective film is configured to reflect infrared light and transmit visible light.

Optionally, the light control glass further comprises an infrared light absorption layer, and the infrared light absorption layer is arranged on the side, away from the second protective glass, of the first protective glass.

Optionally, the material of the infrared light absorption layer comprises one or more of nano ITO, nano ATO, cesium tungsten bronze or rare earth particles.

Optionally, the light control glass further comprises a sixth protective glass and a second bonding layer, and the sixth protective glass is fixedly arranged on one side, far away from the second protective glass, of the first protective glass through the second bonding layer.

Drawings

Fig. 1 is a schematic structural diagram of a light control glass according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an exemplary dimming assembly;

FIG. 3 is a schematic diagram illustrating the operation of the dimming assembly shown in FIG. 2;

fig. 4 is a schematic structural diagram of another light control glass provided in the embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of another light control glass according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of another light control glass provided in the embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another light control glass provided in the embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of another light control glass provided in the embodiment of the present disclosure.

Detailed Description

For a better understanding of the technical aspects of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Although the existing door and window only accounts for about 10% of the area of the outer enclosure structure of the building, the existing door and window accounts for 50% of the total energy loss of the building, and the glass accounts for 70% -80% of the area of the whole window, so that the heat insulation capability of the glass part is very important for the heat insulation performance of the whole window. The energy saving parameters of the external window are generally determined by the shading coefficient and the heat transfer coefficient. The shading coefficient is the total solar transmittance of the outer window/0.87 (the total solar transmittance of 3mm white glass), and the total solar transmittance is the sum of the direct solar transmittance and the secondary heat transfer. The heat transfer coefficient is defined as the amount of heat per unit area of glass per unit time, W/(m 2K), when the ambient temperature difference between the two sides of the glass is 1K (. degree. C.). Therefore, how to reduce the sun-shading coefficient and the heat transfer coefficient and further improve the energy-saving effect of the building external window becomes a technical problem which needs to be solved urgently in the field.

In practical applications, the first protective glass is located close to the outdoor side, and the second protective glass is located close to the indoor side.

In a first aspect, as shown in fig. 1, an embodiment of the present disclosure provides a light control glass, which includes a first protective glass 10, a second protective glass 11, a light control component 13, and a first reflective film 14.

Specifically, a first protective glass 10 and a second protective glass 11 located inside the first protective glass are oppositely arranged, the first protective glass 10 and the second protective glass 11 are fixed by a sealing structure 12, a heat insulation space is formed between the oppositely arranged first protective glass 10 and the second protective glass 11, the dimming assembly 13 is arranged between the first protective glass 10 and the second protective glass 11, that is, the dimming assembly 12 is arranged in the heat insulation space, and the heat insulation space is filled with gas, such as inert gas. Preferably, the gas is argon. Of course, instead of using pure inert gas, air and one or more gases such as krypton and xenon may be used in combination.

As shown in fig. 2, the light modulating component 13 includes a basic light modulating structure 100 without chiral agent, and the basic light modulating structure 100 is a dye liquid crystal cell. Specifically, the dye liquid crystal cell 100 includes a first substrate, a second substrate, and a dye liquid crystal layer 170 disposed between the first substrate and the second substrate; the first substrate includes a first substrate 110, a first electrode 130 and a first alignment layer 150 sequentially disposed on one side of the first substrate 110 close to the liquid crystal layer 170; the second substrate includes: a second substrate 120, a second electrode 140 and a second alignment layer 160 sequentially disposed on one side of the second substrate 120 close to the liquid crystal layer; the material of the liquid crystal layer includes liquid crystal molecules and dichroic dye molecules.

The operation principle of the light adjusting assembly 13 is shown in fig. 3, since the liquid crystal layer 170 is formed by mixing a negative liquid crystal and a dichroic dye, the dichroic dye can rotate with the liquid crystal, and the light absorption amount thereof gradually increases with the rotation angle. When the driving voltage (i.e. the voltage between the first electrode 130 and the second electrode 140) is 0V, the liquid crystal and dye molecules do not rotate, and the light absorption amount is minimum, and the liquid crystal and dye molecules are in a bright state; when the driving voltage (i.e., the voltage between the first electrode 130 and the second electrode 140) is 10V, the rotation angle of the liquid crystal and the dye molecules reaches a maximum of 90 °, the amount of light absorption also reaches a maximum, and a dark state is exhibited. In general, the black dye liquid crystal is formed by mixing three dichroic dyes of red, yellow and blue with a mother liquid crystal, and can adjust visible light transmitted through the first cover glass, but can transmit infrared light. Therefore, in the present embodiment, the first reflective film 14 is disposed on the side of the first protective glass 10 close to the heat insulating space, and is configured to reflect infrared light to reflect the infrared light to the outside and transmit visible light. ,

the materials of the first protective glass 10 and the second protective glass 11 may be selected according to circumstances, and are not particularly limited herein. The protective glass can be common glass or toughened glass, and the embodiment of the disclosure takes the protective glass as the toughened glass as an example for explanation.

The material of the first reflective film 14 can be selected from a metal film layer with near-infrared reflection function such as Ag, Au, Al, etc., or a transparent metal oxide film layer such as ITO, ATO, etc.

In the present embodiment, since the first reflective film 14 is disposed on the side of the first protective glass 10 close to the heat insulating space and configured to reflect infrared light, the heat transfer coefficient value of the light control glass is reduced, thereby improving the energy saving performance of the building.

In some embodiments, as shown in fig. 1, the first cover glass 10 and the second cover glass 11 are fixed by a sealing structure 12. In the present embodiment, by providing the sealing structure 12, water and air can be prevented from entering the cavity formed by the first protective glass 10 and the second protective glass 11, and the light modulating assembly 13 can be prevented from being damaged. The specific material of the sealing structure 12 may be selected according to circumstances, for example, a spacer or a sealant having a sealing function may be selected.

Preferably, the present implementation employs a dual sealant structure, wherein the first sealant is used to prevent ingress of moisture and the second sealant is used to maintain structural stability. Furthermore, the first sealant can adopt hot melt butyl rubber, polyisobutylene rubber, a comfortable rubber strip and the like, and the second sealant can adopt silicone rubber, polyurethane rubber, polysulfide rubber and the like.

In some embodiments, as shown in fig. 1, the dimming component 13 is fixed on the side of the second protective glass 11 close to the first protective glass 10 by the first adhesive layer 15. The material 15 of the first adhesive layer comprises polyvinyl butyral PVB doped with infrared reflective particles, wherein the infrared reflective particles comprise nano ITO particles, cesium tungsten bronze particles, rare earth particles, and the like.

In some embodiments, as shown in fig. 1, the insulating space has a dimension d of 10mm to 14mm corresponding to a direction from the first cover glass 10 to the second cover glass 11. By setting the dimension d of the heat insulating space corresponding to the direction from the first protective glass 10 to the second protective glass 11 to 10mm to 14mm, heat can be dissipated in a sufficient space, preventing heat from being transferred to the indoor side. Preferably, the heat insulating space has a dimension d of 12mm corresponding to the direction from the first cover glass 10 to the second cover glass 11.

In some embodiments, as shown in fig. 1, the light control glass further includes a second reflective film 16, the second reflective film 16 is disposed on a side of the second cover glass 11 away from the heat insulation space, and the second reflective film is configured to reflect infrared light and transmit visible light. The material of the second reflective film 16 can be selected from a metal film layer with near-infrared reflection function such as Ag, Au, Al, etc., or a transparent metal oxide film layer such as ITO, ATO, etc.

In this embodiment, the second reflective film 16 is disposed on a side of the second protective glass 11 away from the isolated space, so that the solar shading coefficient can be further reduced, and the energy saving performance of the building can be improved.

In some embodiments, as shown in fig. 4, the second cover glass 11 is vacuum glass.

In this embodiment, the second protective glass 11 on the indoor side is replaced by vacuum glass, so that convection and conduction of gas are greatly reduced in the vacuum glass 11, the heat transfer coefficient can be further reduced, and the energy-saving performance is improved.

Further, as shown in fig. 4, the vacuum glass includes a third cover glass 111, a fourth cover glass 112, and a third reflective film 18, the fourth cover glass 112 is disposed on a side of the third cover glass 111 away from the first cover glass 10, and the third reflective film 18 is disposed on a side of the third cover glass 111 away from the first cover glass 10. The third reflective film 18 may be a metal film layer having a near-infrared reflection function, such as Ag, Au, or Al, or a transparent metal oxide film layer, such as ITO or ATO.

In this embodiment, the third reflective film 18 is disposed on the side of the third protective glass 111 away from the first protective glass 10, on one hand, the environment in the vacuum glass 11 can ensure that the third reflective film 18 does not deteriorate for a long time, and on the other hand, the low-radiation third reflective film 18 can be matched with a non-conductive and convection vacuum environment to further reduce the heat transfer coefficient and the solar shading coefficient, thereby improving the energy-saving performance of the building.

In some embodiments, as shown in fig. 5, the light control glass further includes a fifth protective glass 19, the fifth protective glass 19 is disposed on a side of the second protective glass 11 away from the first protective glass 10, and the fifth protective glass 19 and the second protective glass 11 are fixed by a sealing structure.

In this embodiment, the fifth protective glass 19 is disposed, and the fifth protective glass 19 and the second protective glass 11 form another heat insulation space, i.e. a three-glass two-cavity structure is formed, so that the heat transfer coefficient can be further reduced.

Further, as shown in fig. 5, in order to further reduce the shading coefficient, a fourth reflective film 20 with low radiation is provided on the second cover glass 11 on the side close to the fifth cover glass 19, and the fourth reflective film 20 is configured to reflect infrared light and transmit visible light. The fourth reflective film 20 may be a metal film layer having a near-infrared reflection function, such as Ag, Au, or Al, or a transparent metal oxide film layer, such as ITO or ATO.

In some embodiments, as shown in fig. 1, 4-6, the light control glass further comprises an infrared light absorption layer 17, and the infrared light absorption layer 17 is disposed on a side of the first protective glass 10 away from the second protective glass 11. The infrared light absorption layer 17 may be an infrared-proof coating layer or an infrared-proof adhesive film. The infrared-proof coating can be a heat-insulating coating made of materials such as nano ITO, nano ATO, cesium tungsten bronze, rare earth particles and the like. The infrared-proof film can be selected from a solar control film with infrared blocking capability, an all-dielectric high-reflection film and the like.

In this embodiment, the infrared light absorption layer 17 is disposed on the side of the first protective glass 10 away from the second protective glass 11, so that infrared light outside the room can be absorbed, the amount of infrared light entering the dimming component 13 is reduced, the shading coefficient can be further reduced, and the energy saving performance of the building can be improved.

In some embodiments, as shown in fig. 6, the light control glass further includes a sixth cover glass 21 and a second adhesive layer 22, and the sixth cover glass 21 is fixedly disposed on a side of the first cover glass 10 away from the second cover glass 11 through the second adhesive layer 22. Further, the second adhesive layer 22 comprises polyvinyl butyral PVB doped with infrared reflective particles, wherein the infrared reflective particles comprise nano ITO particles, cesium tungsten bronze particles, and the like.

In this embodiment, because first protective glass 10 is fixed mutually with sixth protective glass 21 through preventing infrared PVB glued membrane 22, consequently, prevent that infrared PVB glued membrane 22 can absorb the infrared light, reduce the amount that the infrared light got into light modulating assembly 13 to prevent that the heat that infrared PVB glued membrane 22 absorbed can be to outdoor conduction, thereby reduce the shading coefficient, and then improved the energy-conserving performance of building.

It should be noted that, the PVB adhesive film may further include a substance for blocking ultraviolet light to reduce the irradiation amount of the dimming component, thereby improving the weather resistance of the dimming glass.

In some embodiments, as shown in fig. 7, the light control glass includes a first protective glass 10, a second protective glass 11, a light control member 13, a first reflective film 14, and a spacer 24.

Specifically, the first protective glass 10 and the second protective glass 11 are arranged oppositely, the first protective glass 10 and the second protective glass 11 are fixed by the sealing structure 12, the dimming component 13 is fixedly arranged between the first protective glass 10 and the second protective glass 11 by the spacing bar 24, the first reflective film 14 is arranged on one side of the first protective glass 10 close to the second protective glass 11, and the first reflective film 14 is configured to reflect infrared light and transmit visible light.

In this embodiment, the light adjusting assembly 13 is fixedly disposed between the first protective glass 10 and the second protective glass 11 through the spacer 24, so that the accommodating space surrounded by the first protective glass 10 and the second protective glass 11 forms two heat insulating spaces, thereby reducing the heat transfer coefficient and reducing the problems of cracking, local black spots and the like during sheet combination; in addition, since the first reflective film 14 is disposed on the side of the first protective glass 10 close to the second protective glass 11 and is configured to reflect infrared light, the heat transfer coefficient value of the light control glass is further reduced, thereby improving the energy saving performance of the building.

In some embodiments, a desiccant is disposed within the spacer bars 24.

In this embodiment, the dryness of the gas in the interlayer can be ensured by providing a desiccant in the spacer 24.

In some embodiments, as shown in fig. 7, the light control glass further includes a fifth reflective film 23, the fifth reflective film 23 is disposed on a side of the light control assembly 13 close to the second cover glass 11, and the fifth reflective film 23 is configured to reflect infrared light and transmit visible light.

In this embodiment, the fifth reflective film 23 is disposed on the side of the light control assembly 13 close to the second cover glass 11, so that the heat transfer coefficient value of the light control glass can be further reduced, and the energy saving performance of the building can be improved.

In some embodiments, as shown in fig. 7, the light control glass further includes an infrared light absorption layer 17, and the infrared light absorption layer 17 is disposed on a side of the first protective glass 10 away from the second protective glass 11.

Preferably, the material of the infrared light absorbing layer comprises one or more of nano-ITO, nano-ATO, cesium tungsten bronze or rare earth particles.

In the present embodiment, by providing the infrared light absorption layer 17 on the side of the first protective glass 10 away from the second protective glass 11, the infrared light outside the room can be absorbed, the amount of the infrared light entering the dimming component 13 is reduced, and the shading coefficient can be further reduced.

In some embodiments, as shown in fig. 8, the light control glass further includes a sixth cover glass 21 and a second adhesive layer 22, and the sixth cover glass 21 is fixedly disposed on a side of the first cover glass 10 away from the second cover glass 11 through the second adhesive layer 22.

Further, the second adhesive layer 22 comprises polyvinyl butyral PVB doped with infrared reflective particles, wherein the infrared reflective particles comprise nano ITO particles, cesium tungsten bronze particles, and the like.

In this embodiment, because first protective glass 10 is fixed mutually with sixth protective glass 21 through preventing infrared PVB glued membrane 22, consequently, prevent that infrared PVB glued membrane 22 can absorb the infrared light, reduce the amount that the infrared light got into light modulating assembly 13 to prevent that the heat that infrared PVB glued membrane 22 absorbed can be to outdoor conduction, thereby reduce the shading coefficient, and then improved the energy-conserving performance of building. It should be noted that, the PVB adhesive film may further include a substance for blocking ultraviolet light to reduce the irradiation amount of the dimming component, thereby improving the weather resistance of the dimming glass.

Two preferred embodiments are described below as examples:

example 1

As shown in fig. 1, the light control glass includes a first protective glass 10, a second protective glass 11, a light control member 13, a first reflective film 14, a second reflective film 16, a first adhesive layer 15, and an infrared light absorption layer 17.

Specifically, a first protective glass 10 and a second protective glass 11 located inside the first protective glass are arranged oppositely, the first protective glass 10 and the second protective glass 11 are fixed through a sealing structure 12, and a heat insulation space is formed between the first protective glass 10 and the second protective glass 11. The dimming element 13 is fixed to the side of the second cover glass 11 close to the first cover glass 10 by a first adhesive 15 layer. The first reflection film 14 is disposed on a side of the first protective glass 10 close to the heat insulation space, the second reflection film 16 is disposed on a side of the second protective glass 11 away from the heat insulation space, and the first reflection film 13 and the second reflection film 16 are both configured to reflect infrared light and transmit visible light. An infrared light absorption layer 17 is provided on a side of the first protective glass 10 away from the second protective glass 11, the infrared light absorption layer 17 being configured to absorb infrared light.

In the present embodiment, since the first and second

reflective films

14 and 16 are used to reflect infrared light, the heat transfer coefficient value of the light control glass is reduced. Furthermore, the infrared light absorption layer 17 is arranged on the side, away from the second protective glass 11, of the first protective glass 10, so that infrared light on the outdoor side can be absorbed, the amount of the infrared light entering the dimming component 12 is reduced, the sun shading coefficient can be further reduced, and the energy-saving performance of a building is improved.

Example 2

As shown in fig. 7, the light control glass includes a first protective glass 10, a second protective glass 11, a light control member 13, a first reflective film 13, a fifth reflective film 23, and an infrared light absorption layer 17.

Specifically, the first protective glass 10 and the second protective glass 11 are arranged oppositely, the first protective glass 10 and the second protective glass 11 are fixed through the sealing structure 12, the dimming component 13 is fixedly arranged between the first protective glass 10 and the second protective glass 11 through the spacing bar 24, the infrared light absorption layer 17 is arranged on one side of the first protective glass 10 away from the second protective glass 11, the first reflection film 14 is arranged on one side of the first protective glass 10 close to the second protective glass 11, and the fifth reflection film 23 is arranged on one side of the dimming component 13 close to the second protective glass 11, and the first reflection film 14 and the fifth reflection film 23 are configured to reflect infrared light.

In the embodiment, the light adjusting assembly 13 is arranged between the first protective glass 10 and the second protective glass 11 through the spacing bars 24, so that the problems of splintering, local black spots and the like during sheet combination can be reduced; in addition, since the first reflective film 14 is disposed on the side of the first protective glass 10 close to the second protective glass 11 and is configured to reflect infrared light, the heat transfer coefficient value of the light control glass is further reduced, thereby improving the energy saving performance of the building. Furthermore, the infrared light absorption layer 17 is arranged on the side, away from the second protective glass 11, of the first protective glass 10, so that infrared light on the outdoor side can be absorbed, the quantity of the infrared light entering the dimming assembly is reduced, the sun shading coefficient can be further reduced, and the energy-saving performance of a building is improved.

It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these are to be considered as the scope of the disclosure.

Claims

1. A light control glass, comprising:

2. The privacy glass of claim 1, wherein the privacy component comprises: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is arranged between the first substrate and the second substrate; the liquid crystal layer is used for overturning under the control of an electric field generated between the first substrate and the second substrate so as to control the transmittance of light.

3. The dimming glass of claim 2, wherein the dimming component is fixed on one side of the second protective glass close to the first protective glass through a first bonding layer, the material of the first bonding layer comprises polyvinyl butyral doped with infrared reflective particles, and the infrared reflective particles comprise one or more of nano ITO particles, cesium tungsten bronze particles and rare earth particles.

4. A light control glass as recited in claim 3, further comprising a second reflective film disposed on a side of the second cover glass remote from the thermally insulating space, the second reflective film being configured to reflect infrared light and transmit visible light.

5. A light control glass as recited in claim 3, wherein the second cover glass is a vacuum glass, the vacuum glass comprises a third cover glass, a fourth cover glass and a third reflective film, the fourth cover glass is disposed on a side of the third cover glass away from the first cover glass, the third reflective film is disposed on a side of the third cover glass away from the first cover glass, and the third reflective film is configured to reflect infrared light and transmit visible light.

6. A light control glass as defined in claim 3, further comprising a fifth protective glass, the fifth protective glass being disposed on a side of the second protective glass remote from the heat insulating space, the fifth protective glass and the second protective glass being fixed by a sealing structure.

7. The light control glass of claim 6, further comprising a low-emissivity fourth reflective film disposed on a side of the second cover glass adjacent to the fifth cover glass, the fourth reflective film being configured to reflect infrared light and transmit visible light.

8. The light control glass of claim 1, wherein the light control assembly is fixedly disposed between the first protective glass and the second protective glass by a spacer.

9. The light control glass of claim 8, further comprising a fifth reflective film disposed on a side of the light control assembly proximate to the second cover glass, the fifth reflective film configured to reflect infrared light and transmit visible light.

10. A light control glass according to any one of claims 1 to 9, further comprising an infrared light absorption layer provided on a side of the first protective glass remote from the second protective glass.

11. A privacy glass as claimed in any one of claims 1 to 9, wherein the material of the infrared light absorbing layer comprises one or more of nano ITO, nano ATO, caesium tungsten bronze or rare earth particles.

12. A light control glass as defined in any one of claims 1-9, further comprising a sixth cover glass and a second adhesive layer, wherein the sixth cover glass is fixedly disposed on a side of the first cover glass away from the second cover glass via the second adhesive layer.