Dimmable glass, display system, and vehicle

Abstract

The application relates to a dimming glass, a display system and a vehicle. The dimming glass comprises a first glass layer, an ultraviolet isolation layer, a color-changing layer and a second glass layer which are sequentially stacked, a heating assembly is arranged between the first glass layer and the second glass layer, the color-changing layer is composed of a photochromic material and a thermochromic material, and the transmittance of an excited area of the color-changing layer decreases with the increase of temperature within a preset temperature range. By arranging the color-changing layer composed of the photochromic material and the thermochromic material in the dimming glass, the transmittance of the color-changing layer of the dimming glass decreases with the increase of temperature within the preset temperature range, so that the color-changing layer still has a good color-changing effect, and the influence of temperature on the color-changing effect is reduced. Meanwhile, the ultraviolet isolation layer is arranged to isolate the ultraviolet light transmitted from the first glass layer, and the influence of external ultraviolet light on the color-changing layer is reduced.

Description

Technical Field

[0001] This application relates to the field of glass manufacturing technology, and in particular to a dimming glass, a display system, and a vehicle. Background Technology

[0002] With the development of glass manufacturing technology, photochromic glass has emerged. Photochromic glass changes color under irradiation of specific wavelengths and returns to its original color after the light source is removed. Photochromic glass can be applied in the architectural and automotive industries to automatically adjust its transparency according to light intensity. However, in traditional photochromic glass, the transmittance increases with temperature, affecting the photochromic effect. Summary of the Invention

[0003] Therefore, it is necessary to provide a dimming glass, display system, and vehicle that can reduce the impact of temperature on the color-changing effect in response to the above-mentioned technical problems.

[0004] In a first aspect, this application proposes a dimming glass, comprising: a first glass layer, an ultraviolet blocking layer, a color-changing layer and a second glass layer stacked sequentially, wherein a heating component is disposed between the first glass layer and the second glass layer, the color-changing layer is composed of a photochromic material and a thermochromic material, and the transmittance of the excited region of the color-changing layer decreases with increasing temperature within a preset temperature range.

[0005] In one embodiment, within the preset temperature range, the color-changing layer satisfies: |ΔTL1|>|ΔTL2|, ΔTL1=(TL2-TL1) / (T2-T1), ΔTL2=(TL4-TL3) / (T4-T3); where TL1 is the transmittance of the non-excited region of the color-changing layer at temperature T1, TL2 is the transmittance of the non-excited region of the color-changing layer at temperature T2, TL3 is the transmittance of the excited region of the color-changing layer at temperature T3, and TL4 is the transmittance of the excited region of the color-changing layer at temperature T4.

[0006] In one embodiment, within the preset temperature range, the ratio of the transmittance of the non-excited region to the transmittance of the excited region in the color-changing layer is within a preset threshold range, wherein the preset threshold range is 4 to 20.

[0007] In one embodiment, the heating assembly includes a heating coating disposed between the color-changing layer and the second glass layer.

[0008] In one embodiment, the heating assembly includes a heating wire disposed in a structural layer of at least one of the first glass layer, the ultraviolet blocking layer, the color-changing layer, and the second glass layer.

[0009] In one embodiment, the ultraviolet barrier layer includes an adhesive layer in which an ultraviolet absorber is incorporated.

[0010] In one embodiment, the ultraviolet barrier layer includes an adhesive layer and an ultraviolet barrier layer, wherein the adhesive layer is disposed between the first glass layer and the ultraviolet barrier layer.

[0011] In one embodiment, the area of ​​the UV barrier is smaller than the area of ​​the adhesive layer, and the adhesive layer covers the edge of the UV barrier.

[0012] Secondly, this application also proposes a display system, comprising: a dimming glass and a laser projection module as described in the first aspect embodiment above, wherein the laser projection module is used to project laser onto the dimming glass.

[0013] Thirdly, this application also proposes a vehicle comprising: the display system described in the second aspect embodiment above.

[0014] The aforementioned smart glass, display system, and vehicle, by incorporating a color-changing layer composed of photochromic and thermochromic materials within the smart glass, allow the transmittance of the color-changing layer to decrease with increasing temperature within a preset temperature range. This ensures the color-changing layer maintains a good color-changing effect while minimizing the impact of temperature on the effect. Simultaneously, by incorporating an ultraviolet (UV) blocking layer, UV light transmitted from the first glass layer is blocked, reducing the influence of external UV light on the color-changing layer. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the dimming glass in one embodiment;

[0017] Figure 2 This is a schematic diagram of the structure of the heat-coated layer in one embodiment;

[0018] Figure 3 This is a schematic diagram of the heating wire structure in one embodiment;

[0019] Figure 4 This is a schematic diagram of the adhesive layer structure in one embodiment;

[0020] Figure 5This is a schematic diagram of the structure of the ultraviolet separator in one embodiment;

[0021] Figure 6 This is a schematic diagram of the dimming glass structure in another embodiment;

[0022] Figure 7 This is a schematic diagram of the dimming glass structure in yet another embodiment;

[0023] Figure 8 This is a schematic diagram of the system modules in one embodiment.

[0024] Explanation of reference numerals in the attached figures:

[0025] First glass layer 110, ultraviolet blocking layer 120, color-changing layer 130, second glass layer 140, heating coating layer 150, heating wire 160, adhesive layer 121, ultraviolet blocking layer 122, dimming glass 100, laser projection module 200. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0028] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

[0029] Spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” etc., are used herein to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, an element or feature described as “below,” “below,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0030] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. Furthermore, in the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if there is transmission of electrical signals or data between the connected objects.

[0031] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0032] In one embodiment, such as Figure 1 As shown, a dimming glass is provided, comprising: a first glass layer 110, an ultraviolet blocking layer 120, a color-changing layer 130 and a second glass layer 140 stacked sequentially, wherein a heating component is disposed between the first glass layer 110 and the second glass layer 140, the color-changing layer 130 is composed of photochromic material and thermochromic material, and the transmittance of the excited area of ​​the color-changing layer 130 decreases with increasing temperature within a preset temperature range.

[0033] Specifically, the first glass layer 110 is the outer layer of the smart glass, used to protect the internal structure of the smart glass and provide basic light transmittance. The second glass layer 140 is the inner layer of the smart glass, which, together with the first glass layer 110, constitutes the main structure of the smart glass. Both the first glass layer 110 and the second glass layer 140 are made of glass materials with high transparency and strong weather resistance to ensure the overall light transmittance and durability of the smart glass. An ultraviolet (UV) blocking layer 120 is disposed between the first glass layer 110 and the photochromic layer 130. The UV blocking layer 120 is used to block UV rays from penetrating. When UV rays enter from the first glass layer 110, the UV blocking layer 120 blocks the UV rays, preventing them from entering the photochromic layer 130 and affecting the color-changing effect of the photochromic layer 130. It also helps to delay material aging and improve the service life of the smart glass. In some embodiments, the UV blocking layer 120 can be configured to block UV rays with wavelengths from 200nm to 400nm. It is understandable that the UV blocking layer 120 also serves to bond the first glass layer 110 and the color-changing layer 130. Depending on the different structures of the UV blocking layer 120, the UV blocking layer 120 can also be configured in different ways.

[0034] The color-changing layer 130 is the core layer of the smart glass, composed of a mixture of photochromic and thermochromic materials. The photochromic material changes color under illumination of light of a corresponding wavelength. Generally, the higher the light energy, the deeper the color after the color change, and the lower the transmittance of the color-changing layer 130. Furthermore, this change is reversible; when the light source is removed, the color-changing layer 130 gradually returns to its original color state. The thermochromic material changes color with temperature, and this change is also reversible. Depending on its specific material type, the thermochromic material can possess different color-changing properties; its color change can be non-linear or abrupt at a certain temperature. In the color-changing layer 130 of this application, composed of photochromic and thermochromic materials, the transmittance of the excited region of the color-changing layer 130 decreases with increasing temperature within a preset temperature range. Correspondingly, when the color-changing layer 130 is not excited by light, the transmittance of the unexcited region also decreases with increasing temperature within the preset temperature range. When the temperature of the color-changing layer 130 exceeds the maximum value of the preset temperature range, the thermochromic material in the color-changing layer 130 becomes dominant, and the photochromic material fails due to the high temperature. At this time, the excited area will revert to its normal background color. By setting a heating component between the first glass layer 110 and the second glass layer 140, the temperature of the color-changing layer 130 can be actively controlled by the heating component, thereby achieving color control of the excited area.

[0035] When in use, the dimming glass of this application can emit light of a corresponding wavelength to the color-changing layer 130 via the second glass layer 140, thereby achieving overall color control of the dimming glass or displaying local information on the dimming glass. When it is necessary to restore the color of the dimming glass, the dimming glass is heated by controlling the heating component to make the temperature of the color-changing layer 130 exceed the maximum value of the preset temperature range, thereby restoring the normal background color of the excited area in the dimming glass. Since the transmittance of the excited area of ​​the color-changing layer 130 of the dimming glass of this application decreases with increasing temperature within the preset temperature range, even when the dimming glass is exposed to high temperatures under direct sunlight, the color-changing layer 130 can still maintain a good color-changing effect when excited by light of a corresponding wavelength, reducing the impact of external temperature on the color-changing effect. At the same time, by setting an ultraviolet blocking layer 120, ultraviolet light transmitted from the first glass layer 110 is blocked, reducing the impact of external ultraviolet light on the color-changing layer 130.

[0036] In one specific embodiment, as shown in the table below, the transmittance of a conventional photochromic layer and the photochromic layer of this application are within a preset temperature range (25°C to 55°C) under the same irradiance. The thickness of both the conventional photochromic layer and the photochromic layer of this application is set to 0.76 mm. Both are disposed between two pieces of ordinary glass with a thickness of 2.1 mm, and the irradiance is set to 25 W / m². 2 .

[0037]

[0038] As shown in the table above, under constant irradiation intensity and a temperature range of 25℃ to 55℃, the transmittance of conventional photochromic layers increases with increasing temperature, while the transmittance of the photochromic layer 130 in this application decreases with increasing temperature. In this embodiment, when the temperature exceeds 60℃, the photochromic material in the photochromic layer 130 fails due to the high temperature, and the excited area reverts to its normal base color.

[0039] In one embodiment, within a preset temperature range, the color-changing layer 130 satisfies: |ΔTL1|>|ΔTL2|, that is, the absolute value of the change in transmittance of the non-excited region in the color-changing layer 130 per unit temperature, |ΔTL1|, is greater than the absolute value of the change in transmittance of the excited region, |ΔTL2|.

[0040] Specifically, in this embodiment, the color-changing layer 130 is simultaneously affected by photochromism and thermochromism when excited. The change in transmittance ΔTL1 of the unexcited (no light irradiation) region of the color-changing layer 130 when the temperature changes from T1 to T2 is calculated by the following formula:

[0041] ΔTL1=(TL2-TL1) / (T2-T1)

[0042] Wherein, TL1 is the transmittance of the non-excited region of the color-changing layer 130 at temperature T1, and TL2 is the transmittance of the non-excited region of the color-changing layer 130 at temperature T2.

[0043] The change in transmittance ΔTL2 in the excited region of the color-changing layer 130 when the temperature changes from T3 to T4 is calculated by the following formula:

[0044] ΔTL2=(TL4-TL3) / (T4-T3)

[0045] Wherein, TL3 is the transmittance of the excited region of the color-changing layer 130 at temperature T3, and TL4 is the transmittance of the excited region of the color-changing layer 130 at temperature T4.

[0046] After the above calculations, it can be seen that the absolute value of the change in transmittance of the non-excited region per unit temperature, |ΔTL1|, is greater than the absolute value of the change in transmittance of the excited region, |ΔTL2|.

[0047] The table below shows the variation of transmittance of the non-excited region and the excited region of the dimming glass with temperature within a preset temperature range in one embodiment:

[0048]

[0049] As can be seen from the table, when the dimming glass of this application is excited, the decrease in transmittance of the excited area is still relatively small as the temperature rises. When the dimming glass is used for information display, the color change of the displayed information is small, resulting in a better user experience. In some other embodiments, within a preset temperature range, the absolute value of the transmittance change of the non-excited area in the color-changing layer 130 per unit temperature can also be less than or equal to the absolute value of the transmittance change of the excited area. A color difference also exists between the non-excited and excited areas, which can still achieve information display.

[0050] In one embodiment, within a preset temperature range, the ratio of the transmittance of the non-excited region to the transmittance of the excited region in the color-changing layer 130 is within a preset threshold range, wherein the preset threshold range is 4 to 20. Specifically, to ensure that the information displayed by the dimming glass is clearly legible during information display, the ratio of the transmittance of the non-excited region to the transmittance of the excited region in the color-changing layer 130 of the dimming glass in this embodiment needs to be within the preset threshold range. It can be understood that the larger the ratio of the transmittance of the non-excited region to the transmittance of the excited region, the clearer the information display. In some embodiments, the ratio of the transmittance of the non-excited region to the transmittance of the excited region is 5.

[0051] In one embodiment, such as Figure 2 As shown, the heating assembly includes a heating coating 150, which is disposed between the photochromic layer 130 and the second glass layer 140. Specifically, in this embodiment, the heating coating 150 is used to heat the dimming glass. The heating coating 150 is disposed between the photochromic layer 130 and the second glass layer 140, and is in direct contact with the photochromic layer 130 to directly regulate its temperature. The heating coating 150 can be a metal layer directly deposited on the second glass layer 140. By energizing the metal layer, its heating can be controlled, thereby heating the dimming glass. In some embodiments, the thickness of the heating coating 150 is 20 to 80 nm, and the thickness of the photochromic layer 130 is 0.1 to 1.0 mm. In some other embodiments, the heating coating 150 may also be disposed between the first glass layer 110 and the ultraviolet blocking layer 120, and / or between the ultraviolet blocking layer 120 and the color-changing layer 130, and may also serve to heat the color-changing layer 130.

[0052] In one embodiment, such as Figure 3 As shown, the heating assembly includes a heating wire 160, which is disposed in at least one of the structural layers of a first glass layer 110, an ultraviolet blocking layer 120, a photochromic layer 130, and a second glass layer 140. Specifically, in this embodiment, the heating wire 160 is used to heat the dimming glass. The heating wire 160 can be embedded in at least one of the structural layers of the first glass layer 110, the ultraviolet blocking layer 120, the photochromic layer 130, and the second glass layer 140. By energizing the heating wire 160, the dimming glass can be heated. Figure 3 This is a schematic diagram showing a heating wire 160 disposed in the second glass layer 140. The heating wire 160 can be a metal wire such as tungsten wire or copper wire. In some embodiments, the diameter of the heating wire 160 is 0.018 mm to 0.033 mm, and the thickness of the color-changing layer 130 is 0.1 mm to 1.0 mm. In some other embodiments, the heating assembly may also simultaneously provide a heating coating layer 150 and a heating wire 160 to heat the dimming glass.

[0053] In one embodiment, such as Figure 4As shown, the ultraviolet (UV) blocking layer 120 includes an adhesive layer 121, which is doped with a UV absorber. Specifically, in this embodiment, the UV blocking layer 120 functions to bond the first glass layer 110 and the color-changing layer 130. The UV blocking layer 120 is made of the adhesive layer 121 doped with a UV absorber. The adhesive layer 121 includes at least one of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), polyurethane (PU), and ionic interlayer (SGP). The UV absorber is a chemical substance capable of absorbing ultraviolet light. When ultraviolet light irradiates the adhesive layer 121 containing the UV absorber, the UV absorber absorbs the ultraviolet light and converts it into harmless heat energy or other forms of energy, thereby preventing external ultraviolet light from penetrating the color-changing layer 130. The UV absorber can be benzophenone, benzotriazole, salicylate, etc. These different types of UV absorbers have different absorption wavelength ranges and absorption intensities, which can be selected according to specific application requirements.

[0054] In one embodiment, such as Figure 5 As shown, the ultraviolet (UV) blocking layer 120 includes an adhesive layer 121 and a UV blocking layer 122, with the adhesive layer 121 disposed between the first glass layer 110 and the UV blocking layer 122. Specifically, in this embodiment, the UV blocking layer 120 is composed of the adhesive layer 121 and the UV blocking layer 122. The adhesive layer 121 does not contain any UV absorber and only serves to bond the first glass layer 110 and the UV blocking layer 122. The adhesive layer 121 includes at least one of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), polyurethane (PU), and ionic interlayer (SGP). The UV blocking layer 122 can effectively block or absorb ultraviolet light. The UV blocking layer 122 can be a special glass, plastic film, or coating with high absorption or reflection capabilities for ultraviolet light. In some embodiments, the UV blocking layer 122 is a PET (polyethylene terephthalate) material coated with a high UV-blocking coating or film.

[0055] In one embodiment, such as Figure 6 As shown, the area of ​​the ultraviolet barrier layer 122 is smaller than the area of ​​the adhesive layer 121, and the adhesive layer 121 covers the edge of the ultraviolet barrier layer 122. Specifically, in this embodiment, the area of ​​the ultraviolet barrier layer 122 is smaller than the area of ​​the adhesive layer 121. Therefore, the adhesive layer 121 can cover the portion of the ultraviolet barrier layer 122 except for the portion in contact with the color-changing layer 130, thereby achieving full coverage of the edge of the ultraviolet barrier layer 122 and improving the adhesion between the first glass and the color-changing layer 130 at the edge of the dimming glass.

[0056] In one embodiment, such as Figure 7As shown, the dimming glass includes: a first glass layer 110, an adhesive layer 121, an ultraviolet barrier layer 122, a color-changing layer 130, a heat-coated layer 150, and a second glass layer 140, which are stacked sequentially. The area of ​​the ultraviolet barrier layer 122 is smaller than the area of ​​the adhesive layer 121, and the adhesive layer 121 covers the edge of the ultraviolet barrier layer 122. The dimming glass of this embodiment is not affected by the glass shape and curvature when displaying colors; the radius of curvature can be from 5 mm to 100 mm. The adhesive layer 121 includes at least one of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), polyurethane (PU), and ionic interlayer (SGP).

[0057] In one embodiment, such as Figure 8 As shown, this application also proposes a display system, including: the dimming glass 100 and the laser projection module 200 in the above embodiments, wherein the laser projection module 200 is used to perform laser projection onto the dimming glass 100.

[0058] Specifically, the laser projection module 200 can emit lasers of corresponding frequency bands according to a pre-written program or the actual usage scenario. After the laser is projected onto the dimming glass 100, it enters the color-changing layer 130 through the second glass layer 140. Under the excitation of the laser, the excited area of ​​the color-changing layer 130 begins to change color, thereby reducing the transmittance of the excited area. Since the transmittance of the unexcited area of ​​the color-changing layer 130 does not change, a color difference is formed between the excited area and the unexcited area, thus displaying the corresponding graphic. Because the transmittance of the excited area of ​​the color-changing layer 130 in this embodiment gradually decreases within a preset temperature range, even if the dimming glass 100 is in a high-temperature state after exposure to sunlight, it still has a good display effect after laser projection. When the display system does not need to display, the laser projection can be stopped. When the display system needs to adjust the transmittance of the entire dimming glass 100, the color-changing layer 130 can be heated by the heating component in the dimming glass 100, thereby adjusting the overall transmittance of the dimming glass 100.

[0059] In some embodiments, the laser output by the laser projection module 200 has a wavelength range of 250 to 400 nm and a peak wavelength of 392 nm. The laser spot diameter emitted by the laser projection module 200 is less than 3 mm, and the laser irradiance is 15 W / m². 2 Up to 75W / m 2 .

[0060] In one embodiment, this application also proposes a vehicle, which includes the display system described in the above embodiments. The vehicle may include road vehicles, water vehicles, air vehicles, industrial equipment, agricultural equipment, or entertainment equipment, etc. For example, the vehicle may be a vehicle, which is a vehicle in a broad sense, including transportation vehicles (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawnmowers, harvesters, etc.), amusement equipment, toy vehicles, etc. This application does not specifically limit the type of vehicle. As another example, the vehicle may be an airplane or a ship. When the vehicle is a vehicle, the dimming glass 100 may be the vehicle's sunroof, windshield, rear windshield, or side window.

[0061] When the dimming glass 100 is installed on a vehicle as a window, the laser projection module 200 can communicate with the vehicle's infotainment system. Under the control of the system, the module emits ultraviolet laser light to project information onto the glass 100. Traditional window display solutions often utilize LED lights or display modules, but these present significant challenges for high-curvature, uniquely shaped, or technically complex glass, and excessive curvature can negatively impact image quality. When used in headlight displays, headlights are small and have limited functionality, primarily relying on simple functions like flashing and brightness adjustment, which are not conducive to transmitting complex information. The dimming glass 100 of this application, when used as a display film, can adapt to high-curvature and uniquely shaped glass. While projecting the display, it maintains the original lighting and viewing capabilities of the unexcited areas of the window, and its cost is lower than conventional window display films.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A type of dimming glass, characterized in that, include: A first glass layer, an ultraviolet (UV) blocking layer, a photochromic layer, and a second glass layer are stacked sequentially. The first glass layer is the outer layer of the dimming glass, and the second glass layer is the inner layer. The UV blocking layer is disposed between the first glass layer and the photochromic layer. A heating component is disposed between the first glass layer and the second glass layer. The photochromic layer is composed of a mixture of photochromic and thermochromic materials. The transmittance of the excited region of the photochromic layer decreases with increasing temperature within a preset temperature range. The excited region is excited by a laser projection module. Within the preset temperature range, the color-changing layer satisfies: |ΔTL1|>|ΔTL2|, ΔTL1=(TL2-TL1) / (T2-T1), ΔTL2=(TL4-TL3) / (T4-T3); where TL1 is the transmittance of the non-excited region of the color-changing layer at temperature T1, TL2 is the transmittance of the non-excited region of the color-changing layer at temperature T2, TL3 is the transmittance of the excited region of the color-changing layer at temperature T3, and TL4 is the transmittance of the excited region of the color-changing layer at temperature T4.

2. The dimming glass according to claim 1, characterized in that, Within the preset temperature range, the ratio of the transmittance of the non-excited region to the transmittance of the excited region in the color-changing layer is within a preset threshold range, wherein the preset threshold range is 4 to 20.

3. The dimming glass according to claim 1, characterized in that, The heating component includes a heating coating disposed between the color-changing layer and the second glass layer.

4. The dimming glass according to claim 1, characterized in that, The heating component includes a heating wire disposed in a structural layer of at least one of the first glass layer, the ultraviolet blocking layer, the color-changing layer, and the second glass layer.

5. The dimming glass according to claim 1, characterized in that, The ultraviolet barrier layer includes an adhesive layer, wherein the adhesive layer is doped with an ultraviolet absorber.

6. The dimming glass according to claim 1, characterized in that, The ultraviolet barrier layer includes an adhesive layer and an ultraviolet barrier layer, wherein the adhesive layer is disposed between the first glass layer and the ultraviolet barrier layer.

7. The dimming glass according to claim 6, characterized in that, The area of ​​the ultraviolet barrier is smaller than the area of ​​the adhesive layer, and the adhesive layer covers the edge of the ultraviolet barrier.

8. A display system, characterized in that, include: The dimming glass and laser projection module according to any one of claims 1 to 7, wherein the laser projection module is used to perform laser projection onto the dimming glass.

9. A vehicle, characterized in that, include: The display system according to claim 8.

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