Laminated glass, projection system and vehicle

Abstract

The invention provides laminated glass, a projection system and a vehicle. The laminated glass is provided with a projection display area, the projection display area is used for receiving projection light rays and reflecting the projection light rays to form a display image, the projection display area is provided with a first wedge shape in the horizontal line direction and a second wedge shape in the direction perpendicular to the horizontal line, and the first wedge shape is used for correcting horizontal ghosting. The first wedge shape is used for adjusting the horizontal ghosting so that the displacement difference between the horizontal ghosting and the display image is within a first preset range, and the second wedge shape is used for adjusting the vertical ghosting so that the displacement difference between the vertical ghosting and the display image is within a second preset range. The first wedge shape in the horizontal line direction is arranged in the projection display area, so that ghosting light deflects in the horizontal direction, the horizontal ghosting and the main image are overlapped, and the blurring feeling and the dizziness feeling when the human eyes observe the image are relieved; in addition, the second wedge shape perpendicular to the horizontal line direction is further arranged, the second wedge shape is matched with the first wedge shape, the blurring feeling and the dizziness feeling of images observed by human eyes are relieved, and the definition of the displayed images is improved.

Description

Technical Field

[0001] This application belongs to the technical field of glass, and particularly relates to laminated glass, a projection system, and a vehicle. Background Art

[0002] In a vehicle, the display image formed in the projection display area of the laminated glass usually includes a main image and a ghost image. The ghost image can also be understood as a double image, which can cause the image observed by the human eye to be blurred and dizzy, resulting in a poor experience. Since the projection display area of the laminated glass has an inclination in the vertical direction towards the driver, i.e., backward inclination, and also an inclination in the horizontal direction towards the driver, i.e., side inclination. This results in the ghost image having both a vertical ghost image and a horizontal ghost image. However, in the related art, usually only the vertical ghost image is adjusted, resulting in the horizontal ghost image not being improved, thereby aggravating the blurring and dizziness of the image observed by the human eye. Summary of the Invention

[0003] In view of this, in the first aspect of this application, a laminated glass is provided. The laminated glass has a projection display area for receiving projection light and reflecting the projection light to form a display image. There is a side inclination angle α between the projection display area and the horizontal line direction, and the side inclination angle α is 0 to 15°. The projection display area has a first wedge along the horizontal line direction and a second wedge along the direction perpendicular to the horizontal line.

[0004] The projection light also forms a horizontal ghost image and a vertical ghost image. The first wedge is used to calibrate the horizontal ghost image so that the displacement difference between the horizontal ghost image and the display image is within a first preset range. The second wedge is used to calibrate the vertical ghost image so that the displacement difference between the vertical ghost image and the display image is within a second preset range.

[0005] Wherein, the second wedge forms an equivalent wedge, and the equivalent wedge and the first wedge are used to jointly calibrate the horizontal ghost image so that the displacement difference between the horizontal ghost image and the display image is within the first preset range.

[0006] Wherein, the first preset range is that the absolute value of the displacement difference between the horizontal ghost image and the display image is ≤ 1.5 arcmin, or ≤ 1.0 arcmin, or ≤ 0.75 arcmin.

[0007] The second preset range is that the absolute value of the displacement difference between the vertical ghost image and the display image is ≤ 2.5 arcmin, or ≤ 2.0 arcmin, or ≤ 1.5 arcmin.

[0008] Wherein, the side inclination angle α ≤ 10°, or ≤ 8°.

[0009] Among them, in the arrangement direction from the edge of the laminated glass to the center of the laminated glass, the thickness of the laminated glass having the first wedge shape gradually increases;

[0010] Or, in the arrangement direction from the edge of the laminated glass to the center of the laminated glass, the thickness of the laminated glass having the first wedge shape gradually decreases.

[0011] Among them, the absolute value of the wedge angle of the first wedge shape ≤ 0.2 mrad, or ≤ 0.15 mrad, or ≤ 0.1 mrad.

[0012] Among them, the wedge angle of the first wedge shape is a fixed value; and / or, the first wedge shape has at least two different wedge angles.

[0013] Among them, one of the projection display areas includes a left sub-area and a right sub-area arranged in the horizontal line direction. The first wedge shape located in the left sub-area has a left sub-wedge angle, and the first wedge shape located in the right sub-area has a right sub-wedge angle, and the left sub-wedge angle is not equal to the right sub-wedge angle.

[0014] Among them, the absolute value of the left sub-wedge angle is greater than the absolute value of the right sub-wedge angle.

[0015] Among them, the maximum value of the absolute values of the left sub-wedge angle and the right sub-wedge angle ≤ 0.2 mrad.

[0016] Among them, the wedge angle of the first wedge shape changes linearly in the horizontal line direction, or the wedge angle of the first wedge shape changes monotonically non-linearly in the horizontal line direction;

[0017] Or, the wedge angle of the first wedge shape increases or decreases in the horizontal line direction;

[0018] The wedge angle of the second wedge shape changes linearly in the direction perpendicular to the horizontal line, or the wedge angle of the second wedge shape changes monotonically non-linearly in the direction perpendicular to the horizontal line;

[0019] Or, the wedge angle of the second wedge shape increases or decreases in the direction perpendicular to the horizontal line.

[0020] Among them, the projection display area includes a left display area on the left side of the laminated glass and a right display area on the right side of the laminated glass, and at least one of the left display area and the right display area has the first wedge shape.

[0021] Among them, both the left display area and the right display area have the first wedge shape, and the first wedge shape located in the left display area and the first wedge shape located in the right display area are symmetrically arranged about the center axis of the laminated glass.

[0022] Among them, in the arrangement direction from the bottom edge to the top edge of the laminated glass, the thickness of the laminated glass having the second wedge shape gradually increases.

[0023] Among them, the wedge angle of the second wedge shape is 0.2 mrad to 0.75 mrad, or 0.2 mrad to 0.6 mrad, or 0.35 mrad to 0.6 mrad.

[0024] Among them, the laminated glass further includes a first glass plate, an adhesive layer, and a second glass plate. The adhesive layer is disposed between the first glass plate and the second glass plate, and at least one of the first glass plate, the adhesive layer, and the second glass plate has a wedge shape.

[0025] Among them, the first wedge shape is disposed on one of the first glass plate, the adhesive layer, and the second glass plate, and the second wedge shape is disposed on another one of the first glass plate, the adhesive layer, and the second glass plate.

[0026] Among them, the first glass plate has the first wedge shape; or, the adhesive layer has the first wedge shape; or, the second glass plate has the first wedge shape.

[0027] Among them, the first wedge shape is composed of a combination of a first sub-wedge shape and a second sub-wedge shape. One of the first glass plate, the adhesive layer, and the second glass plate has the first sub-wedge shape, and another one of the first glass plate, the adhesive layer, and the second glass plate has the second sub-wedge shape.

[0028] Among them, the first wedge shape is composed of a combination of a first sub-wedge shape and a second sub-wedge shape. The adhesive layer includes a first adhesive sub-layer and a second adhesive sub-layer stacked. The first adhesive sub-layer has the first sub-wedge shape, and the second adhesive sub-layer has the second sub-wedge shape.

[0029] Among them, the first glass plate has the second wedge shape; or, the adhesive layer has the second wedge shape; or, the second glass plate has the second wedge shape.

[0030] Among them, the second wedge shape is composed of a combination of a third sub-wedge shape and a fourth sub-wedge shape. One of the first glass plate, the adhesive layer, and the second glass plate has the third sub-wedge shape, and another one of the first glass plate, the adhesive layer, and the second glass plate has the fourth sub-wedge shape.

[0031] Among them, the second wedge is composed of a combination of a third sub-wedge and a fourth sub-wedge. The bonding layer includes a first bonding sub-layer and a second bonding sub-layer arranged in a stacked manner. The first bonding sub-layer has the third sub-wedge, and the second bonding sub-layer has the fourth sub-wedge.

[0032] Among them, the first glass plate has a first vertical shower direction, and the second glass plate has a second vertical shower direction. The included angle between the first vertical shower direction and the second vertical shower direction is the same and ≤ 10°.

[0033] Among them, the first glass plate and / or the second glass plate having a wedge along the horizontal line direction includes a first processing area and a second processing area. During the forming process of the laminated glass, the first processing area is processed first, and then the second processing area is processed. The thickness of the first processing area is greater than the thickness of the second processing area.

[0034] Among them, the laminated glass satisfies: |(T1 + W1 × H) - (T2 + W2 × H)| ≤ 0.5 mm, and |W1 - W2| ≤ 0.3 mrad;

[0035] Among them, the thickness of the first glass plate is T1, the thickness of the second glass plate is T2, and the unit of T1 and T2 is mm; the average wedge angle of the first wedge is W1, the average wedge angle of the second wedge is W2, and the units of W1 and W2 are mrad; the height of the laminated glass is H, and the unit of H is m.

[0036] In a second aspect of the present application, a projection system is provided. The projection system includes a projection device and the laminated glass provided in the first aspect of the present application. The projection device is arranged on one side of the laminated glass, and the projection device is used to generate projection light.

[0037] In a third aspect of the present application, a vehicle is provided. The vehicle includes a vehicle body and the laminated glass provided in the first aspect of the present application. The laminated glass is installed on the vehicle body.

[0038] The laminated glass, projection system and vehicle provided by the present application set a first wedge along the horizontal line direction in the projection display area, so that the ghost light is deflected in the horizontal direction, realizing the overlap of the horizontal ghost and the main image, reducing the blurring and dizziness of the human eye when observing the image, making the displayed image clearer, and improving the display effect of the projection; and, a second wedge along the direction perpendicular to the horizontal line is also set. The second wedge cooperates with the first wedge, realizing both the overlap of the vertical ghost and the main image and the overlap of the horizontal ghost and the main image, further reducing the blurring and dizziness of the human eye when observing the image, and further improving the clarity of the displayed image. Description of the Drawings

[0039] To more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings required for use in the embodiments of the present application will be described below.

[0040] Figure 1 It is a schematic structural diagram of laminated glass in the related art.

[0041] Figure 2 It is a top view of laminated glass in the related art.

[0042] Figure 3 It is a schematic optical path diagram of the projection light on the laminated glass in the top view direction in the related art.

[0043] Figure 4 It is a schematic optical path diagram of the projection light on the laminated glass in the side view direction in the related art.

[0044] Figure 5 It is a schematic structural diagram of the laminated glass provided in an embodiment of the present application.

[0045] Figure 6 It is a schematic optical path diagram of the projection light on the laminated glass in the top view direction provided in an embodiment of the present application.

[0046] Figure 7 It is a sectional view of the laminated glass in the top view direction provided in an embodiment of the present application.

[0047] Figure 8 It is a sectional view of the laminated glass in the top view direction provided in another embodiment of the present application.

[0048] Figure 9 It is a sectional view of the laminated glass in the top view direction provided in yet another embodiment of the present application.

[0049] Figure 10 It is a sectional structural view of the laminated glass provided in an embodiment of the present application.

[0050] Figure 11 It is a sectional structural view of the laminated glass provided in another embodiment of the present application.

[0051] Figure 12 It is a sectional structural view of the laminated glass provided in yet another embodiment of the present application.

[0052] Figure 13 It is a sectional structural view of the laminated glass provided in still another embodiment of the present application.

[0053] Figure 14 It is an exploded view of the structure of the laminated glass provided in an embodiment of the present application.

[0054] Figure 15Explosion diagram of the structure of the laminated glass provided by another embodiment in the present application.

[0055] Figure 16 Cross-sectional view of the structure of the laminated glass provided by yet another embodiment in the present application.

[0056] Label description: Laminated glass 1, Projection display area 10, Left display area 10a, Right display area 10b, Left sub-area 101, Right sub-area 102, First glass plate 11, Adhesive layer 12, First adhesive sub-layer 121, Second adhesive sub-layer 122, Second glass plate 13, Functional layer 14. Specific embodiments

[0057] The following are the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

[0058] Before introducing the technical solution of the present application, the technical problems in the related art will be introduced in detail.

[0059] In a vehicle, usually, an image generation unit in a projector projects instrument signals such as vehicle speed, navigation, etc. onto optical elements such as folding mirrors, aspherical mirrors, etc., and then reflects them onto the projection display area on the inner surface of the laminated glass. The projection light enters the human eye after being reflected by the laminated glass, forms an image in front of the laminated glass, and forms a bright virtual image, which is called the main image. Since the laminated glass is a transparent medium, the light enters the transparent glass medium, is reflected on the outer surface of the glass, and enters the human eye again, forming a relatively dim second virtual image in front of the laminated glass, which is called a ghost or a double image. The double image will cause the image observed by the human eye to be blurred and dizzy, resulting in a poor experience.

[0060] Please refer to Figures 1 - 2 , for example, the projection display area 10 is usually located directly in front of the driver's line of sight, and the two side edges of the front windshield are bent towards the A-pillar. Taking a left-hand drive as an example, this causes the projection display area 10 to have a certain leftward tilt angle relative to the line of sight. Thus, it can be seen that the projection display area 10 of the laminated glass 1 has an inclination towards the driver in the vertical direction, that is, a backward tilt, and also has an inclination towards the driver in the horizontal direction, that is, a side tilt. Among them, the side tilt angle is such as Figure 2As shown by α in the figure, when viewed from a top-down perspective along the up-and-down direction of the laminated glass 1, the tangent line a is the tangent line of the HUD area (i.e., the projection display area 10) in the horizontal line direction at the intersection of the main axis light ray of the HUD virtual image and the HUD area. The angle between the tangent line a and the horizontal line direction is the tilt angle of the HUD area (projection display area 10). This results in the ghost image having both a vertical ghost image and a horizontal ghost image. However, in the related art, the vertical ghost image is usually adjusted, resulting in the horizontal ghost image not being improved, thereby aggravating the blurring and dizziness of the human eye when observing the image. When the projection display area 10 is larger and the tilt of the projection display area 10 is greater, the horizontal ghosting is more obvious.

[0061] At this time, the longitudinal wedge angle adjusts the vertical ghost image, but the horizontal ghost image is not improved. There are three situations for the horizontal ghost image: First, on the left side of the main image; Second, coinciding with the main image; Third, on the right side of the main image. This depends on factors such as the shape of the laminated glass 1, the optical path design of the projection light, and the size of the longitudinal wedge angle.

[0062] In view of this, to solve the above problems, please refer to Figures 5 - 6 simultaneously. In this embodiment, a laminated glass 1 is provided. The laminated glass 1 has a projection display area 10. The projection display area 10 is configured to receive projection light and reflect the projection light to form a display image. There is a tilt angle α between the projection display area 10 and the horizontal line direction. The tilt angle α is 0 to 15°. The projection display area 10 has a first wedge along the horizontal line direction and a second wedge along a direction perpendicular to the horizontal line direction.

[0063] The projection light also forms a horizontal ghost image and a vertical ghost image. The first wedge is used to calibrate the horizontal ghost image so that the displacement difference between the horizontal ghost image and the display image is within a first preset range. The second wedge is used to calibrate the vertical ghost image so that the displacement difference between the vertical ghost image and the display image is within a second preset range. Here, the direction along the horizontal line can also be understood as the horizontal direction, or the transverse direction. Specifically, the direction along the horizontal line refers to the direction of the horizontal line perpendicular to the driving direction on the horizontal plane. The direction perpendicular to the horizontal line can also be understood as the vertical direction, or the longitudinal direction. Specifically, the direction perpendicular to the horizontal line refers to the direction that is perpendicular to both the driving direction and the horizontal line direction.

[0064] There is a tilt angle α between the projection display area 10 and the horizontal line direction, and α is 0 to 15°. Specific examples can be 1°, or 2°, or 3°, or 4°, or 5°, or 6°, or 7°, or 8°, or 9°, or 10°, or 11°, or 12°, or 13°, or 14°, or 15°, etc. In some embodiments, the range of the tilt angle is 1° ≤ α ≤ 10°, or 1° ≤ α ≤ 8.

[0065] Wherein, the second wedge forms an equivalent wedge, and the equivalent wedge and the first wedge are used to jointly calibrate the horizontal ghost image so that the displacement difference between the horizontal ghost image and the displayed image is within the first preset range.

[0066] As Figure 3 shown, surprisingly, the applicant found that the longitudinal wedge angle also affects the horizontal ghost image in some cases. Specifically, for the laminated glass 1 with a longitudinal wedge angle, the transmission path of the projected light is as Figure 4 shown. Figure 3 And Figure 4 shown, setting the center of the eye box and the midpoint of the target virtual image as the line of sight direction, as Figure 3 shown, looking from the top view direction of the vehicle, that is, from the top edge to the bottom edge of the laminated glass 1, the left side of the projection display area 10 has an inclination (roll) towards the driver. The main image light and the ghost image light are incident on the inner surface of the laminated glass 1 from the right side of the line of sight direction. Among them, the ghost image light first refracts through the inner surface (point a) of the laminated glass 1 to the outer surface (point b) of the laminated glass 1, is reflected, and then refracts through the inner surface (point c) of the laminated glass 1 to the eye box observation position. Then, the position of the exit point c is on the left side of the incident point a position, and point b is between point c and point a; the main image is as Figure 3 shown as A1 in Figure 3 , the ghost image is as Figure 3 shown as A2 in Figure 3 , the projection light forming the main image is as Figure 4 shown as L1 in

[0067] Looking from the top view direction of the vehicle (i.e., Figure 3 ), the thickness at point b is greater than the thickness at point a. At this time, although the glass does not have a wedge in the horizontal direction, it has an effect equivalent to a wedge for adjusting the size of the ghost image. Therefore, this is also called the wedge effect. In other words, the wedge effect means that the laminated glass has no wedge angle in the horizontal direction but achieves an effect similar to setting a wedge, and has the ability to change the horizontal ghost image. It can also be understood that the second wedge along the direction perpendicular to the horizontal line forms an equivalent wedge, and the equivalent wedge has the ability to calibrate the horizontal ghost image.

[0068] In some embodiments, the equivalent wedge can reduce the horizontal ghosting phenomenon, narrow the adjustment range of the first wedge, and thus reduce the design and manufacturing difficulty of the first wedge. However, in some embodiments, the equivalent wedge may also have an adverse effect on calibrating the horizontal ghosting. In some cases, the horizontal ghosting becomes larger, resulting in unclear images and failure to meet the requirement that the displacement difference between the horizontal ghosting and the displayed image is within the first preset range, with obvious ghosting phenomenon. Therefore, in this application, by providing a first wedge that cooperates with the equivalent wedge, the displacement difference between the horizontal ghosting and the displayed image can always be within the first preset range, enabling the horizontal ghosting to overlap with the main image, reducing the blurring and dizziness when observing the image with the human eye, making the displayed image clearer, and improving the projection display effect.

[0069] In some embodiments, when the absolute value of the displacement difference between the horizontal ghosting and the displayed image in the first preset range is ≤ 1.5 arcmin, the horizontal ghosting and the main image are basically overlapped, and it is difficult for the driver to distinguish the horizontal ghosting from the main image with the naked eye. In some further embodiments, the first preset range is that the absolute value of the displacement difference between the horizontal ghosting and the displayed image is ≤ 1.0 arcmin, or ≤ 0.75 arcmin, which can further improve the projection clarity and the projection display effect.

[0070] In some embodiments, when the absolute value of the displacement difference between the vertical ghosting and the displayed image in the second preset range is ≤ 2.5 arcmin, the vertical ghosting and the main image are basically overlapped, and it is difficult for the driver to distinguish the vertical ghosting from the main image with the naked eye. In some further embodiments, the second preset range is that the absolute value of the displacement difference between the vertical ghosting and the displayed image is ≤ 2.0 arcmin, or ≤ 1.5 arcmin, which can further improve the projection clarity and the projection display effect.

[0071] Reference Figure 5 , the dashed line O indicates the central axis of the first glass plate 11. For the glass with only the second wedge, when the horizontal ghosting in the projection display area appears at a position closer to the central axis side relative to the main image, it is necessary to make the thickness change of the first wedge in the horizontal line direction in the projection display area show a state of decreasing from the thickness on the side closer to the central axis to the thickness on the side away from the central axis. In this state, the wedge angle of the first wedge is positive; taking Figure 5 the left display area 10a in

[0072] Similarly, when the horizontal ghost image in the projection display area appears at a position farther from the central axis than the main image, it is necessary to make the thickness change of the first wedge in the horizontal line direction of the projection display area show a state where the thickness increases from the side closer to the central axis to the side farther from the central axis. In this state, the wedge angle of the first wedge is negative.

[0073] Specifically, the laminated glass 1 further includes a first glass plate 11, an adhesive layer 12, and a second glass plate 13. The adhesive layer 12 is disposed between the first glass plate 11 and the second glass plate 13. At least one of the first glass plate 11, the adhesive layer 12, and the second glass plate 13 has a wedge shape. Among them, the wedge shape can be a first wedge, a second wedge, or a sub-wedge that can be combined to form a first wedge or a second wedge.

[0074] For example, the first glass plate 11 only has a first wedge in the horizontal line direction; or, the first glass plate 11 only has a second wedge in the direction perpendicular to the horizontal line; or, the first glass plate 11 has both a first wedge in the horizontal line direction and a second wedge in the direction perpendicular to the horizontal line.

[0075] Another example is that the adhesive layer 12 only has a first wedge in the horizontal line direction; or, the adhesive layer 12 only has a second wedge in the direction perpendicular to the horizontal line; or, the adhesive layer 12 has both a first wedge in the horizontal line direction and a second wedge in the direction perpendicular to the horizontal line.

[0076] Still another example is that the second glass plate 13 only has a first wedge in the horizontal line direction; or, the second glass plate 13 only has a second wedge in the direction perpendicular to the horizontal line; or, the second glass plate 13 has both a first wedge in the horizontal line direction and a second wedge in the direction perpendicular to the horizontal line.

[0077] More specifically, the first glass plate 11 serves as the outer glass plate of the laminated glass 1, and the second glass plate 13 serves as the inner glass plate of the laminated glass 1. The first glass plate 11 has a first surface and a second surface. The first surface faces away from the adhesive layer 12 and contacts the external environment of the vehicle, and the second surface is close to the adhesive layer 12. The second glass plate 13 has a third surface and a fourth surface. The third surface is close to the adhesive layer 12, and the fourth surface faces away from the adhesive layer 12 and is close to the internal environment of the vehicle. At least part of the adhesive layer 12 connects the second surface and the third surface. The display image formed in the projection display area 10 can be observed by the vehicle occupants.

[0078] Among them, the thickness of the first glass plate 11 is 1.6 mm to 2.5 mm, and the visible light transmittance of the first glass plate 11 is ≥70%, or ≥80%, or ≥90%; the first glass plate 11 is transparent glass or ultra-clear glass (extra-white glass). The total iron content of the transparent glass (standard white glass) (in terms of Fe 2 O3 (calculated) is less than or equal to 0.1%, even less than or equal to 0.05%, and the visible light transmittance of the transparent glass is 80% - 95%. The total iron content of the ultra-clear glass (ultra-white glass) (calculated as Fe 2 O 3 (calculated) is less than or equal to 0.015%, even less than or equal to 0.01%, and even more less than or equal to 50 PPM, and the visible light transmittance of the ultra-clear glass is 90% - 95%. For example, the first glass plate 11 can be a transparent glass with a thickness of 2.1 mm and a visible light transmittance of 89%, or can be a green glass with a thickness of 1.6 mm and a visible light transmittance of 83%, or a green glass with a thickness of 2.1 mm and a visible light transmittance of 80%.

[0079] The adhesive layer 12 can be a transparent thermoplastic polymer film or a lightly colored thermoplastic polymer film, and the thickness of the adhesive layer 12 is 0.2 mm - 1 mm. For example, the thickness of the adhesive layer 12 can be, but is not limited to, 0.2 mm, or 0.38 mm, or 0.76 mm, or 1 mm, etc. The material of the thermoplastic polymer film can be selected from at least one of polyvinyl butyral (PVB), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA), TPU (thermoplastic polyurethane), and ionomer (SGP).

[0080] Optionally, the visible light transmittance of the adhesive layer 12 is ≥70%, or ≥80%, or ≥85%. When the adhesive layer 12 is a transparent thermoplastic polymer, the visible light transmittance of the transparent thermoplastic polymer is greater than or equal to 85%. For example, the visible light transmittance of the adhesive layer 12 can be, but is not limited to, 85%, or 90%, or 95%, etc.

[0081] Optionally, the adhesive layer 12 can be a single-layer structure or a multi-layer structure. The multi-layer structure can be, for example, a double-layer structure, a three-layer structure, a four-layer structure, a five-layer structure, etc. The adhesive layer 12 can also have other functions. For example, adding an infrared absorber to have a sunscreen or heat insulation function, or adding an ultraviolet absorber to have an ultraviolet isolation function, or the plasticizer content of at least one layer of the multi-layer structure is higher to have a sound insulation function.

[0082] The thickness of the second glass plate 13 is 1.1 mm - 2.5 mm, and the visible light transmittance of the second glass plate 13 is ≥70%, or ≥80%, or ≥85%, or ≥90%. The second glass plate 13 is a transparent glass, an ultra-clear glass, or a lightly colored glass; the total iron content of the transparent glass (standard white glass) (calculated as Fe 2 O 3The total iron content (calculated as Fe 2 O 3 in the transparent glass is less than or equal to 0.1%, even less than or equal to 0.05%, and the visible light transmittance of the transparent glass is 80% - 95%. The total iron content (calculated as Fe

[0083] in the ultra-clear glass is less than or equal to 0.015%, even less than or equal to 0.01%, and even less than or equal to 50 PPM, and the visible light transmittance of the ultra-clear glass is 90% - 95%. For example, the second glass plate 13 can be a transparent glass with a thickness of 2.1 mm and a visible light transmittance of 89%, or a green glass with a thickness of 1.6 mm and a visible light transmittance of 83%, or a green glass with a thickness of 2.1 mm and a visible light transmittance of 80%.

[0084] For the first wedge, in one embodiment, along the arrangement direction from the edge of the laminated glass 1 to the center of the laminated glass 1, the thickness of the laminated glass 1 having the first wedge gradually increases. In other words, along the horizontal line direction, the thickness near the edge of the laminated glass 1 is small, and the thickness near the center of the laminated glass 1 is large. It can also be understood that along the horizontal line direction, the edge is thin and the middle is thick.

[0085] Taking the left-hand drive of a vehicle as an example, when the horizontal ghost image is on the right side of the main image, an anti-complementary wedge can be used to adjust the position of the horizontal ghost image relative to the main image. As Figure 6 shown, the thickness near the edge of the laminated glass 1 is small, and the thickness near the center of the laminated glass 1 is large. That is, in the left-hand drive view, the left is thin and the right is thick, so that the horizontal ghost image coincides with the main image.

[0086] Taking the right-hand drive of a vehicle as an example, when the horizontal ghost image is on the left side of the main image, an anti-complementary wedge can be used to adjust the position of the horizontal ghost image relative to the main image. As Figure 7 shown, the thickness near the edge of the laminated glass 1 is small, and the thickness near the center of the laminated glass 1 is large. That is, in the right-hand drive view, the left is thick and the right is thin, so that the horizontal ghost image coincides with the main image.

[0087] In another embodiment, along the arrangement direction from the edge of the laminated glass 1 to the center of the laminated glass 1, the thickness of the laminated glass 1 having the first wedge gradually decreases. In other words, along the horizontal line direction, the thickness near the edge of the laminated glass 1 is large, and the thickness near the center of the laminated glass 1 is small. It can also be understood that along the horizontal line direction, the edge is thick and the middle is thin.

[0088] Taking the left-driving of a vehicle as an example, when the horizontal ghost image is on the left side of the main image, an anti-complementary wedge can be used to adjust the position of the horizontal ghost image relative to the main image. As Figure 8 shown, the thickness near the edge of the laminated glass 1 is large, and the thickness near the center of the laminated glass 1 is small. That is, in the view of the left-driving, it is thick on the left and thin on the right, so that the horizontal ghost image coincides with the main image.

[0089] Taking the right-driving of a vehicle as an example, when the horizontal ghost image is on the right side of the main image, an anti-complementary wedge can be used to adjust the position of the horizontal ghost image relative to the main image. As Figure 9 shown, the thickness near the edge of the laminated glass 1 is large, and the thickness near the center of the laminated glass 1 is small. That is, in the view of the right-driving, it is thin on the left and thick on the right, so that the horizontal ghost image coincides with the main image.

[0090] It should be noted that in this application, in order to better represent the first wedge, the laminated glass 1 is divided into left and right sides along the longitudinal symmetry plane. Starting from the left side of the laminated glass 1, the thickness of the upper laminated glass 1 gradually increases from left to right, and the wedge angle of the first wedge is a positive value; conversely, the thickness of the upper laminated glass 1 gradually decreases from left to right, and the wedge angle of the first wedge is a negative value.

[0091] For example, +0.17 mrad means that starting from the left side of the laminated glass 1, the thickness of the upper laminated glass 1 gradually increases from left to right, and the wedge angle of the first wedge is 0.17 mrad. Another example, -0.12 mrad means that starting from the left side of the laminated glass 1, the thickness of the laminated glass 1 gradually decreases from left to right, and the wedge angle of the first wedge is 0.12 mrad.

[0092] Similarly, in order to better represent the second wedge, starting from the bottom edge of the laminated glass 1, the thickness of the upper laminated glass 1 gradually increases from the bottom edge to the top edge, and the wedge angle of the second wedge is a positive value; conversely, the thickness of the upper laminated glass 1 gradually decreases from the bottom edge to the top edge, and the wedge angle of the second wedge is a negative value.

[0093] Specifically, the absolute value of the wedge angle of the first wedge ≤ 0.2 mrad. Specifically, examples can be 0.2 mrad, or 0.175 mrad, or 0.15 mrad, or 0.125 mrad, or 0.1 mrad, or 0.075 mrad, or 0.05 mrad, or 0.025 mrad, etc.; preferably, the absolute value of the wedge angle of the first wedge ≤ 0.15 mrad; more preferably, the absolute value of the wedge angle of the first wedge ≤ 0.10 mrad. Since the tilt angle of the projection display area 10 is usually in the range of 0 - 15°, considering that the horizontal tilt angle is usually small, the horizontal ghosting value of the projection display area 10 is small when observed at the set viewing angle within the human eye box range. By limiting the absolute value of the wedge angle of the first wedge to ≤ 0.2 mrad, it can better match the viewing angle within the human eye box range, deflect the ghosting light in the horizontal direction, overlap the ghosting with the main image, reduce the blurring and dizziness when the human eye observes the image, make the displayed image clearer, and improve the display effect of the projection.

[0094] In one embodiment, the wedge angle of the first wedge is a fixed value. The wedge angle of the first wedge is a fixed wedge angle. For example, the wedge angle of the first wedge is only 0.15 mrad. Optionally, when the wedge angle of the first wedge is a fixed value, the absolute value of the wedge angle of the first wedge ≤ 0.15 mrad, which is convenient for production control and product sharing.

[0095] In another embodiment, the first wedge has at least two different wedge angles. The wedge angle of the first wedge is a variable wedge angle. For example, the wedge angle of the first wedge changes linearly along the horizontal line direction, or the wedge angle of the first wedge changes monotonically non-linearly along the horizontal line direction. The wedge angle of the first wedge increases or decreases along the horizontal line direction. This is convenient for precise customization according to the optical path of the projection display area 10. The horizontal ghosting sizes at different virtual image positions are different. In this embodiment, different wedge angles are set at different positions on the laminated glass 1 to precisely adjust the horizontal ghosting, further reducing the blurring and dizziness when the human eye observes the image, and further improving the clarity of the displayed image.

[0096] For example, the wedge angle of the second wedge changes linearly along the direction perpendicular to the horizontal line, or the wedge angle of the second wedge changes monotonically non-linearly along the direction perpendicular to the horizontal line; or the wedge angle of the second wedge increases or decreases along the direction perpendicular to the horizontal line.

[0097] Among them, a projection display area 10 includes a left sub-area 101 and a right sub-area 102 arranged along the horizontal direction. The first wedge in the left sub-area 101 has a left sub-wedge angle, and the first wedge in the right sub-area 102 has a right sub-wedge angle. The left sub-wedge angle is not equal to the right sub-wedge angle. For example, the left sub-wedge angle is greater than the right sub-wedge angle; or, the left sub-wedge angle is less than the right sub-wedge angle.

[0098] Taking the left-driving vehicle as an example, the horizontal ghost value in the left sub-area 101 is greater than the horizontal ghost value in the right sub-area 102. Therefore, by making the absolute value of the left sub-wedge angle greater than the absolute value of the right sub-wedge angle, the horizontal ghost in the projection display area 10 can be accurately adjusted, further reducing the blurring and dizziness when the human eye observes the image, and further improving the clarity of the displayed image.

[0099] Taking the right-driving vehicle as an example, the horizontal ghost value in the right sub-area 102 is greater than the horizontal ghost value in the left sub-area 101. Therefore, by making the left sub-wedge angle less than the right sub-wedge angle, the horizontal ghost in the projection display area 10 can be accurately adjusted, further reducing the blurring and dizziness when the human eye observes the image, and further improving the clarity of the displayed image.

[0100] Moreover, the maximum value of the absolute values of the left sub-wedge angle and the right sub-wedge angle ≤ 0.2 mrad. Specifically, examples can be 0.2 mrad, or 0.175 mrad, or 0.15 mrad, or 0.125 mrad, or 0.1 mrad, or 0.075 mrad, or 0.05 mrad, or 0.025 mrad, etc. For example, from the left sub-area 101 to the right sub-area 102, the wedge angle of the first wedge changes from +0.17 mrad to -0.12 mrad, and the maximum value of its absolute value is 0.17 mrad, meeting the requirement of ≤ 0.2 mrad.

[0101] In another embodiment, the projection display area 10 includes a left display area 10a on the left side of the laminated glass 1 and a right display area 10b on the right side of the laminated glass 1. At least one of the left display area 10a and the right display area 10b has a first wedge.

[0102] The left display area 10a corresponds to the left driver's seat of the vehicle, and the right display area corresponds to the right driver's seat of the vehicle. For example, only the left display area 10a has a first wedge; or, only the right display area 10b has a first wedge; or, both the left display area 10a and the right display area 10b have a first wedge. Preferably, when both the left display area 10a and the right display area 10b have a first wedge, the first wedge in the left display area 10a and the first wedge in the right display area 10b are symmetrically arranged along the central axis of the laminated glass 1 for ease of production and cooperation with other components. The central axis of the laminated glass 1 is asFigure 5 as shown by the dashed line O.

[0103] For the second wedge, in the arrangement direction from the bottom edge to the top edge of the laminated glass 1, the thickness of the laminated glass 1 with the second wedge gradually increases. In other words, in the direction perpendicular to the horizontal line, the thickness near the bottom edge of the laminated glass 1 is small, and the thickness near the top edge of the laminated glass 1 is large. It can also be understood that in the direction perpendicular to the horizontal line, the bottom edge is thin and the top edge is thick.

[0104] Specifically, the wedge angle of the second wedge is 0.2 mrad to 0.75 mrad. Specifically, examples can be 0.2 mrad, or 0.25 mrad, or 0.3 mrad, or 0.35 mrad, or 0.4 mrad, or 0.45 mrad, or 0.5 mrad, or 0.55 mrad, or 0.6 mrad, or 0.65 mrad, or 0.7 mrad, or 0.75 mrad, etc.; preferably, the wedge angle of the second wedge is 0.2 mrad to 0.6 mrad; more preferably, the wedge angle of the second wedge is 0.35 mrad to 0.6 mrad. Since the rear tilt angle of the projection display area 10 is usually greater than 15°, considering that the vertical side tilt angle is usually large, the vertical ghost value of the projection display area 10 observed at the set viewing angle within the human eye box range is large. The wedge angle of the second wedge is 0.2 mrad to 0.75 mrad to better match the viewing angle within the human eye box range, deflect the ghost light in the vertical direction, overlap the ghost image with the main image, further reduce the blurring and dizziness of the human eye when observing the image, and further improve the clarity of the displayed image.

[0105] Please refer to Figures 10 - 13 together. In the laminated glass 1, the first wedge and the second wedge of the projection display area 10 can be formed by a single component alone or by a combination of multiple components. The following details the ways in which the laminated glass 1 forms the first wedge and the second wedge.

[0106] For example, the first wedge is provided on one of the first glass plate, the adhesive layer, and the second glass plate, and the second wedge is provided on the other of the first glass plate, the adhesive layer, and the second glass plate. In other words, the first wedge and the second wedge are respectively provided on different layer structures.

[0107] In an embodiment, for the first wedge, the first glass plate 11 has the first wedge; or, the adhesive layer 12 has the first wedge; or, the second glass plate 13 has the first wedge.

[0108] For example, as Figure 10As shown, only the first glass plate 11 has a first wedge shape, and the adhesive layer 12 and the second glass plate 13 do not have a wedge shape in the horizontal line direction, so that the first glass plate 11 alone constitutes the first wedge shape of the laminated glass 1; or, only the adhesive layer 12 has a first wedge shape, and the first glass plate 11 and the second glass plate 13 do not have a wedge shape in the horizontal line direction, so that the adhesive layer 12 alone constitutes the first wedge shape of the laminated glass 1; or, as Figure 11 shown, only the second glass plate 13 has a first wedge shape, and the first glass plate 11 and the adhesive layer 12 do not have a wedge shape in the horizontal line direction, so that the second glass plate 13 alone constitutes the first wedge shape of the laminated glass 1.

[0109] For the second wedge shape, the first glass plate 11 has a second wedge shape; or, the adhesive layer 12 has a second wedge shape; or, the second glass plate 13 has a second wedge shape.

[0110] For example, as Figure 10 shown, only the first glass plate 11 has a second wedge shape, and the adhesive layer 12 and the second glass plate 13 do not have a wedge shape perpendicular to the horizontal line direction, so that the first glass plate 11 alone constitutes the second wedge shape of the laminated glass 1; or, only the adhesive layer 12 has a second wedge shape, and the first glass plate 11 and the second glass plate 13 do not have a wedge shape perpendicular to the horizontal line direction, so that the adhesive layer 12 alone constitutes the second wedge shape of the laminated glass 1; or, as Figure 11 shown, only the second glass plate 13 has a second wedge shape, and the first glass plate 11 and the adhesive layer 12 do not have a wedge shape perpendicular to the horizontal line direction, so that the second glass plate 13 alone constitutes the second wedge shape of the laminated glass 1.

[0111] In another embodiment, for the first wedge shape, the first wedge shape is composed of a combination of a first sub - wedge shape and a second sub - wedge shape. One of the first glass plate 11, the adhesive layer 12, and the second glass plate 13 has the first sub - wedge shape, and another of the first glass plate 11, the adhesive layer 12, and the second glass plate 13 has the second sub - wedge shape.

[0112] For example, as Figure 12 shown, the first glass plate 11 has a first sub - wedge shape, the adhesive layer 12 has a second sub - wedge shape, and the second glass plate 13 does not have a wedge shape in the horizontal line direction, so that the first glass plate 11 and the adhesive layer 12 are combined to form the first wedge shape of the laminated glass 1; or, the second glass plate 13 has a first sub - wedge shape, the adhesive layer 12 has a second sub - wedge shape, and the first glass plate 11 does not have a wedge shape in the horizontal line direction, so that the second glass plate 13 and the adhesive layer 12 are combined to form the first wedge shape of the laminated glass 1; or, the first glass plate 11 has a first sub - wedge shape, the second glass plate 13 has a second sub - wedge shape, and the adhesive layer 12 does not have a wedge shape in the horizontal line direction, so that the first glass plate 11 and the second glass plate 13 are combined to form the first wedge shape of the laminated glass 1.

[0113] More specifically, a first wedge of, for example, 0.15 mrad can be formed by combining a first glass plate 11 having a first sub-wedge of 0.1 mrad with an adhesive layer 12 having a second sub-wedge of 0.05 mrad.

[0114] For the second wedge, the second wedge is formed by combining a third sub-wedge and a fourth sub-wedge. One of the first glass plate 11, the adhesive layer 12, and the second glass plate 13 has the third sub-wedge, and the other of the first glass plate 11, the adhesive layer 12, and the second glass plate 13 has the fourth sub-wedge.

[0115] For example, as Figure 12 shown, the first glass plate 11 has the third sub-wedge, the adhesive layer 12 has the fourth sub-wedge, and the second glass plate 13 does not have a wedge in a direction perpendicular to the horizontal line, such that the first glass plate 11 and the adhesive layer 12 are combined to form the second wedge of the laminated glass 1; or, the second glass plate 13 has the third sub-wedge, the adhesive layer 12 has the fourth sub-wedge, and the first glass plate 11 does not have a wedge in a direction perpendicular to the horizontal line, such that the second glass plate 13 and the adhesive layer 12 are combined to form the second wedge of the laminated glass 1; or, the first glass plate 11 has the third sub-wedge, the second glass plate 13 has the fourth sub-wedge, and the adhesive layer 12 does not have a wedge in a direction perpendicular to the horizontal line, such that the first glass plate 11 and the second glass plate 13 are combined to form the second wedge of the laminated glass 1.

[0116] More specifically, a second wedge of 0.45 mrad can be formed by combining a first glass plate 11 having a third sub-wedge of 0.20 mrad with an adhesive layer 12 having a fourth sub-wedge of 0.25 mrad.

[0117] In yet another embodiment, for the first wedge, the first wedge is formed by combining a first sub-wedge and a second sub-wedge. The adhesive layer 12 includes a first adhesive sub-layer 121 and a second adhesive sub-layer 122 arranged in a stacked manner. The first adhesive sub-layer 121 has the first sub-wedge, and the second adhesive sub-layer 122 has the second sub-wedge.

[0118] For example, as Figure 13 shown, the first adhesive sub-layer 121 has the first sub-wedge, the second adhesive sub-layer 122 has the second sub-wedge, and the first glass plate 11 and the second glass plate 13 do not have a wedge in the horizontal line direction, such that the first adhesive sub-layer 121 and the second adhesive sub-layer 122 are combined to form the first wedge of the laminated glass 1.

[0119] More specifically, a first wedge of 0.15 mrad can be formed by combining a first adhesive sub-layer 121 having a first sub-wedge of 0.1 mrad with a second adhesive sub-layer 122 having a second sub-wedge of 0.05 mrad.

[0120] For the second wedge, the second wedge is formed by combining a third sub - wedge and a fourth sub - wedge. The adhesive layer 12 includes a first adhesive sub - layer 121 and a second adhesive sub - layer 122 arranged in a stacked manner. The first adhesive sub - layer 121 has the third sub - wedge, and the second adhesive sub - layer 122 has the fourth sub - wedge.

[0121] For example, as Figure 13 shown, the first adhesive sub - layer 121 has the third sub - wedge, and the second adhesive sub - layer 122 has the fourth sub - wedge. The first glass plate 11 and the second glass plate 13 do not have a wedge in the direction perpendicular to the horizontal line, so that the first adhesive sub - layer 121 and the second adhesive sub - layer 122 are combined to form the second wedge of the laminated glass 1.

[0122] More specifically, a second wedge of 0.45 mrad can be formed by combining a first adhesive sub - layer 121 with a third sub - wedge of 0.20 mrad and a second adhesive sub - layer 122 with a fourth sub - wedge of 0.25 mrad.

[0123] Among them, please refer to Figure 14 and Figure 15 . The first glass plate 11 has a first vertical pouring direction, and the second glass plate 13 has a second vertical pouring direction. The included angle between the first vertical pouring direction and the second vertical pouring direction is the same and ≤ 10°. Optionally, the vertical pouring directions of the first glass plate 11 and the second glass plate 13 are the same, and the first vertical pouring direction and the second vertical pouring direction are as shown by the direction D in Figure 14 .

[0124] The vertical pouring direction refers to the direction in which the molten glass advances on the tin liquid surface during the production of float glass. The first vertical pouring direction is perpendicular to the horizontal line direction, and the second vertical pouring direction is perpendicular to the horizontal line direction. Both the first glass plate 11 and the second glass plate 13 are vertically poured. Compared with the laminated glass 1 with a horizontal pour in the prior art, in this embodiment, by limiting the included angle between the vertical pouring directions of the first glass plate 11 and the second glass plate 13 to be the same and ≤ 10°, it is possible to reduce the driver's visual distortion and fatigue, reduce the blurring and dizziness of the human eye when observing images, so as to improve the comfort and safety of the driver.

[0125] The laminated glass 1 satisfies: |(T1 + W1×H)-(T2 + W2×H)|≤0.5 mm, and |W1 - W2|≤0.3 mrad; where, the thickness of the first glass plate 11 is T1, the thickness of the second glass plate 13 is T2, and the units of T1 and T2 are mm; the average wedge angle of the first wedge is W1, the average wedge angle of the second wedge is W2, and the units of W1 and W2 are mrad; the height of the laminated glass 1 is H, and the unit of H is m.

[0126] For example, when the thicknesses of the first glass plate 11 and the second glass plate 13 are equal, i.e., T1 = T2, the maximum thickness difference |W1 - W2|*H in the longitudinal direction ≤ 0.5 mrad; when H is approximately 1 m, then the transverse and longitudinal wedge angle difference |W1 - W2| ≤ 0.5 mrad. If the transverse and longitudinal wedge angle difference is too large, the wedge angle should be decomposed onto other sheets, and it is advisable to keep the transverse and longitudinal wedge angles of the first glass plate 11 the same or the transverse and longitudinal wedge angle difference ≤ 0.3 mrad, and the transverse and longitudinal wedge angles of the second glass plate 13 the same or the transverse and longitudinal wedge angle difference ≤ 0.3 mrad. For example, the total longitudinal wedge of the laminated glass 1 is 0.65 mrad, which can be: the first glass plate 11 is 0.30 mrad, the second glass plate 13 is 0 mrad, and the adhesive layer 12 is 0.35 mrad.

[0127] When the thicknesses of the first glass plate 11 and the second glass plate 13 are not equal, for example: H = 1 m, T1 = 2.1 mm, T2 = 1.8 mm, the total longitudinal wedge requirement of the laminated glass 1 product is 0.60 mrad, which can be disassembled into: the first glass plate 11 is 0 mrad, the second glass plate 13 is 0.20 mrad, and the adhesive layer 12 is 0.40 mrad.

[0128] In this embodiment, the relationship between the thickness of the first glass plate 11, the thickness of the second glass plate 13, the height of the laminated glass 1, the first wedge, and the second wedge is defined by the above formula to avoid an excessive wedge angle value of one component and also avoid an excessive difference in the transverse and longitudinal wedge angles between the first glass plate 11 and the second glass plate 13, which not only reduces the manufacturing difficulty but also improves the reliability of the laminated glass 1 and avoids an excessive impact on the calibrated display image due to damage to one component.

[0129] In one embodiment, please refer to Figure 16 , the laminated glass 1 further includes a functional layer 14, the functional layer 14 is disposed between the first glass plate 11 and the second glass plate 13, the functional layer 14 has a wedge shape to form the first wedge and / or the second wedge, and the functional layer 14 is used for heat insulation, or sound insulation, or heating, or antireflection, or reflection, or sunshading, etc.

[0130] For example, the functional layer 14 is disposed between the first glass plate 11 and the adhesive layer 12. Another example is that the functional layer 14 is disposed between the adhesive layer 12 and the second glass plate 13. Still another example is that the adhesive layer 12 includes a first adhesive sublayer 121 and a second adhesive sublayer 122 arranged in a stacked manner, and the functional layer 14 is disposed between the first adhesive sublayer 121 and the second adhesive sublayer 122.

[0131] The first wedge and the second wedge can be solely constituted by one functional layer 14, or can be constituted by the combination of the functional layer 14 and other components. The following details the ways in which the functional layer 14 forms the first wedge and the second wedge.

[0132] Optionally, the functional layer 14 has a first tapered shape; or, the functional layer 14 has a second tapered shape.

[0133] Optionally, the first wedge is composed of a first sub-wedge and a second sub-wedge, the functional layer 14 has the first sub-wedge, and one of the first glass plate 11, the bonding layer 12, and the second glass plate 13 has the second sub-wedge; or, the second wedge is composed of a third sub-wedge and a fourth sub-wedge, the functional layer 14 has the third sub-wedge, and one of the first glass plate 11, the bonding layer 12, and the second glass plate 13 has a fourth sub-wedge.

[0134] The present application also provides a projection system, which includes a projection device and the laminated glass provided above in the present application, wherein the projection device is disposed on one side of the laminated glass, and is used to generate projection light.

[0135] Specifically, the projection device is arranged on the side of the second glass plate away from the adhesive layer. The projection device is used to generate projection light, the projection light includes P polarized light and / or S polarized light, the wavelength of the projection light can be in the range of 380nm-780nm, the projection light is incident on the projection display area at an incident angle of 38°-85°, and the projection display area reflects the projection light to form a display image that can be observed by people in the car, especially for the driver, who can observe the image without lowering his head, so that the driver has a better field of vision and a longer line of sight for observing external conditions, and can more easily obtain the necessary information for assisted driving, greatly improving driving safety, so that it can partially replace or even completely replace the traditional instrument panel, and even cancel the traditional instrument panel.

[0136] The present application also provides a vehicle, comprising a vehicle body, and the laminated glass provided as described above in the present application, wherein the laminated glass is installed on the vehicle body.

[0137] The projection device of the projection system is installed inside the vehicle body, and the laminated glass is installed at the opening of the vehicle body.

[0138] When the laminated glass is installed on a vehicle, it is preferably used as the front windshield of the vehicle, but not limited thereto, the laminated glass can also be used as the rear windshield, or skylight glass, or side window glass, or corner window glass, thereby providing more display scene applications for the vehicle.

[0139] In summary, the laminated glass, projection system, and vehicle provided by the present application are configured such that, by providing a first wedge shape in the projection display area along the horizontal direction, ghost light is deflected in the horizontal direction, causing the horizontal ghost image to overlap with the main image, thereby reducing the blurring and dizziness felt by the human eye when observing the image, making the displayed image clearer, and improving the display effect of the projection. Additionally, a second wedge shape is provided along a direction perpendicular to the horizontal line. The second wedge shape cooperates with the first wedge shape to not only cause the vertical ghost image to overlap with the main image but also cause the horizontal ghost image to overlap with the main image, further reducing the blurring and dizziness felt by the human eye when observing the image and further improving the clarity of the displayed image.

[0140] To make the objectives and advantages of the present application clearer, the following further elaborates on the effects of the laminated glass of the present application in detail with reference to specific embodiments.

[0141] The laminated glass combination used is a first glass plate at 2.0 mm / adhesive layer at 0.76 mm / second glass plate at 2.0 mm, and the installation angle of the laminated glass on the vehicle is 25.4 deg; the vertical curvature R1 of the projection display area ranges from 5385 mm to R6020 mm, and the horizontal curvature R2 ranges from 4240 mm to 3741 mm.

[0142] The projection display area is for left - hand driving. The observation specifications of the projection display area are 130 mm * 50 mm, the virtual image distance VID is 4000 mm, the lower viewing angle LDA at the observation position is 4.63 deg, the left viewing angle LOA is 0 deg, and the field - of - view FOV specification is 9 × 2.3 deg. The distance from the center point of the observation position to the intersection of its principal optical axis and the inner surface of the glass is 812 mm, and the incident angle of the principal optical axis light is 68.0 deg.

[0143] The inner inclination angle of the projection display area in the vertical direction is 63.2° (tilted from the vertical towards the driver's side), and the inner inclination angle of the projection display area in the horizontal direction is 5.9° (tilted from the left towards the driver's side). The projection device uses a traditional optical reflection scheme, which includes a concave mirror and a planar folding mirror.

[0144] The method for calculating the vertical and horizontal ghost images is as follows: Divide the virtual image pattern into a dot matrix of 5 rows × 15 columns (which can be m × n, selected according to requirements), and divide the observation eye box into a dot matrix of 3 rows × 3 columns (which can be i × j, selected according to requirements). When observing at the observation position, the coordinate values of the virtual image dot matrix in the projection display area can be obtained using ANSYS SPEOS or Zemax optical software or Dassault CATIA software, and then the vertical and horizontal ghost images in the virtual image can be calculated.

[0145] The horizontal ghost image data without transverse and longitudinal wedge angles are shown in Table 1, that is, the horizontal ghost image data are shown in Table 1 when there is no first wedge and second wedge in the laminated glass. Among them, V0 represents a vertical wedge angle of 0 mrad, H0 represents a horizontal wedge angle of 0 mrad, and the unit of the ghost image data in Table 1 is arcmin.

[0146] Table 1: Horizontal ghost image data without the first wedge and the second wedge

[0147]

[0148] As can be seen from Table 1, the horizontal ghost images on the entire virtual image plane are relatively small. The left dot matrix has a positive ghost image, that is, the ghost image is on the right side of the main image, and the right dot matrix has a negative ghost image, that is, the ghost image is on the left side of the main image.

[0149] The horizontal ghost image data with only a longitudinal wedge angle are shown in Table 2, that is, the horizontal ghost image data are shown in Table 2 when there is only the second wedge in the laminated glass. Among them, V0.37 represents a vertical wedge angle of 0.37 mrad, H0 represents a horizontal wedge angle of 0 mrad, and the unit of the ghost image data in Table 2 is arcmin.

[0150] Table 2: Horizontal ghost image data with only the second wedge

[0151]

[0152] As can be seen from Table 2, since the second wedge is added to the laminated glass, the ghost image values of the dot matrix on the entire virtual image plane are changed, which can improve the vertical ghost image, but the improvement effect on the horizontal ghost image is not good. Specifically, although the second wedge can form an equivalent wedge and has a wedge effect, the equivalent wedge changes the horizontal ghost image, but the changed effect may bring adverse effects. In some cases, the horizontal ghost image becomes larger, resulting in unclear images.

[0153] The horizontal ghost image data with transverse and longitudinal wedge angles are shown in Table 3, that is, the horizontal ghost image data are shown in Table 3 when there are the first wedge and the second wedge in the laminated glass. Among them, V0.37 represents a vertical wedge angle of 0.37 mrad, H0.10 represents a horizontal wedge angle of 0.10 mrad, and the unit of the ghost image data in Table 3 is arcmin.

[0154] Table 3: Horizontal ghost image data with the first wedge and the second wedge

[0155]

[0156] As can be seen from Table 3, by using the laminated glass with the first wedge and the second wedge provided in this application, and the first wedge can cooperate with the equivalent wedge, the ghost image value of the dot matrix on the entire virtual image plane becomes smaller, thereby improving the image clarity. Further, the horizontal ghost images on a virtual image plane are not all zero values. Therefore, different wedge angles can be precisely customized according to the horizontal ghost image sizes at different virtual image positions in the projection display area, and then the horizontal ghost images at each position can be accurately adjusted, so that a variable wedge angle can be formed. The data of the eye position can also be considered to adjust the first wedge and the second wedge, so as to obtain the best horizontal variable wedge curve for the entire viewing range.

[0157] In addition, by adjusting the wedge angle in the vertical direction of the laminated glass, the size of the vertical ghost image can be adjusted. According to the simulation, the curve of the vertical ghost image changing with the wedge angle can be obtained, and then an optimal vertical wedge angle can be selected. For example, the wedge angle of the best second wedge adopted in this embodiment is 0.370 mrad. On this basis, similarly, by adjusting the wedge angle in the horizontal direction of the laminated glass, the size of the horizontal ghost image can be adjusted. According to the simulation, the curve of the horizontal ghost image changing with the wedge angle can be obtained, and then an optimal horizontal wedge angle can be selected. For example, the wedge angle of the best first wedge adopted in this embodiment is 0.102 mrad.

[0158] Unless otherwise specified or there are contradictions, the terms or phrases used in this application have the following meanings:

[0159] In this application, "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features.

[0160] In this application, "one or several" means any one, any two, or any two or more of the listed items. Among them, "several" means any two or more.

[0161] In this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to this application.

[0162] In this application, unless otherwise clearly stipulated and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it can be a connection, a detachable connection, or integrated. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0163] In this application, referring to "embodiment" or "implementation manner" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The appearance of the above phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in each embodiment of this application can be combined arbitrarily without contradiction to form another embodiment that does not depart from the spirit and scope of the technical solution of this application.

[0164] The above are some implementation manners of this application. It should be noted that for those of ordinary skill in the art, without departing from the principle of this application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of this application.

Claims

1. A laminated glass, characterized in that: The laminated glass has a projection display area, the projection display area is used to receive projection light and reflect the projection light to form a display image, there is a tilt angle α between the projection display area and the horizontal line direction, the tilt angle α is 0-15°, and the projection display area has a first wedge shape along the horizontal line direction and a second wedge shape perpendicular to the horizontal line direction; The projection light also forms horizontal ghosts and vertical ghosts. The first wedge is used to calibrate the horizontal ghost so that the displacement difference between the horizontal ghost and the displayed image is within a first preset range. The second wedge is used to calibrate the vertical ghost so that the displacement difference between the vertical ghost and the displayed image is within a second preset range.

2. The laminated glass according to claim 1, characterized in that: The second wedge forms an equivalent wedge, and the equivalent wedge and the first wedge are used to jointly calibrate the horizontal ghost so that the displacement difference between the horizontal ghost and the displayed image is within the first preset range.

3. The laminated glass according to claim 1 or 2, characterized in that: The first preset range is that the absolute value of the displacement difference between the horizontal ghost and the displayed image is ≤1.5 arcmin, or ≤1.0 arcmin, or ≤0.75 arcmin; The second preset range is that the absolute value of the displacement difference between the vertical ghost and the displayed image is ≤2.5 arcmin, or ≤2.0 arcmin, or ≤1.5 arcmin.

4. The laminated glass according to claim 1, characterized in that: The roll angle α is ≤10°, or ≤8°.

5. The laminated glass according to claim 1, characterized in that: Along the arrangement direction from the edge of the laminated glass to the center of the laminated glass, the thickness of the laminated glass having the first wedge shape gradually increases; Alternatively, along an arrangement direction from an edge of the laminated glass to a center of the laminated glass, a thickness of the laminated glass having the first wedge shape gradually decreases.

6. The laminated glass according to claim 1, characterized in that: The absolute value of the wedge angle of the first wedge is ≤0.2 mrad, or ≤0.15 mrad, or ≤0.1 mrad.

7. The laminated glass according to claim 1, characterized in that: The wedge angle of the first wedge is a fixed value; and / or the first wedge has at least two different wedge angles.

8. The laminated glass according to claim 1, wherein: The projection display area includes a left sub-area and a right sub-area arranged along a horizontal line direction, the first wedge located in the left sub-area has a left sub-wedge angle, the first wedge located in the right sub-area has a right sub-wedge angle, and the left sub-wedge angle is not equal to the right sub-wedge angle.

9. The laminated glass according to claim 8, characterized in that: The absolute value of the left sub-wedge angle is greater than the absolute value of the right sub-wedge angle.

10. The laminated glass according to claim 8, characterized in that: The maximum absolute value of the left sub-wedge angle and the right sub-wedge angle is ≤0.2 mrad.

11. The laminated glass according to claim 1, characterized in that: The wedge angle of the first wedge changes linearly along the horizontal line direction, or the wedge angle of the first wedge changes monotonically nonlinearly along the horizontal line direction; Alternatively, the wedge angle of the first wedge increases or decreases along the horizontal line direction; The wedge angle of the second wedge changes linearly along a direction perpendicular to the horizontal line, or the wedge angle of the second wedge changes monotonically nonlinearly along a direction perpendicular to the horizontal line; Alternatively, the wedge angle of the second wedge increases or decreases along a direction perpendicular to the horizontal line.

12. The laminated glass according to claim 1, characterized in that: The projection display area includes a left display area located on the left side of the laminated glass and a right display area located on the right side of the laminated glass, and at least one of the left display area and the right display area has the first wedge shape.

13. The laminated glass according to claim 12, characterized in that: The left display area and the right display area both have the first wedge shape, and the first wedge shape located in the left display area and the first wedge shape located in the right display area are symmetrically arranged along the central axis of the laminated glass.

14. The laminated glass according to claim 1, characterized in that: Along the arrangement direction from the bottom edge of the laminated glass to the top edge of the laminated glass, the thickness of the laminated glass having the second wedge shape gradually increases.

15. The laminated glass according to claim 1, characterized in that: The wedge angle of the second wedge is 0.2 mrad to 0.75 mrad, or 0.2 mrad to 0.6 mrad, or 0.35 mrad to 0.6 mrad.

16. The laminated glass according to claim 1, wherein: The laminated glass further includes a first glass plate, an adhesive layer, and a second glass plate. The adhesive layer is disposed between the first glass plate and the second glass plate. At least one of the first glass plate, the adhesive layer, and the second glass plate has a wedge shape.

17. The laminated glass according to claim 16, characterized in that: The first wedge is provided on one of the first glass plate, the adhesive layer, and the second glass plate, and the second wedge is provided on the other of the first glass plate, the adhesive layer, and the second glass plate.

18. The laminated glass according to claim 16, wherein: The first glass plate has the first wedge shape; or the adhesive layer has the first wedge shape; or the second glass plate has the first wedge shape.

19. The laminated glass according to claim 16, wherein: The first wedge is composed of a first sub-wedge and a second sub-wedge. One of the first glass plate, the bonding layer, and the second glass plate has the first sub-wedge, and the other of the first glass plate, the bonding layer, and the second glass plate has the second sub-wedge.

20. The laminated glass according to claim 16, wherein: The first wedge is composed of a first sub-wedge and a second sub-wedge, and the bonding layer includes a first bonding sub-layer and a second bonding sub-layer stacked together. The first bonding sub-layer has the first sub-wedge, and the second bonding sub-layer has the second sub-wedge.

21. The laminated glass according to claim 16, wherein: The first glass plate has the second wedge shape; or the adhesive layer has the second wedge shape; or the second glass plate has the second wedge shape.

22. The laminated glass according to claim 16, characterized in that: The second wedge is composed of a third sub-wedge and a fourth sub-wedge, one of the first glass plate, the bonding layer, and the second glass plate has the third sub-wedge, and the other of the first glass plate, the bonding layer, and the second glass plate has the fourth sub-wedge.

23. The laminated glass according to claim 16, wherein: The second wedge is composed of a third sub-wedge and a fourth sub-wedge, and the bonding layer includes a first bonding sub-layer and a second bonding sub-layer stacked together, the first bonding sub-layer has the third sub-wedge, and the second bonding sub-layer has the fourth sub-wedge.

24. The laminated glass according to claim 16, wherein: The first glass plate has a first vertical shower direction, the second glass plate has a second vertical shower direction, and the angle between the first vertical shower direction and the second vertical shower direction is the same and is ≤10°.

25. The laminated glass according to claim 16, characterized in that: The first glass plate and / or the second glass plate having a wedge shape along a horizontal line direction comprises a first processing area and a second processing area. During the forming process of the laminated glass, the first processing area is processed first and then the second processing area is processed. The thickness of the first processing area is greater than the thickness of the second processing area.

26. The laminated glass according to claim 16, wherein: The laminated glass satisfies: |(T1+W1×H)-(T2+W2×H)|≤0.5mm, and |W1-W2|≤0.3mrad; The thickness of the first glass plate is T1, the thickness of the second glass plate is T2, and the units of T1 and T2 are mm; the average wedge angle of the first wedge is W1, the average wedge angle of the second wedge is W2, and the units of W1 and W2 are mrad; the height of the laminated glass is H, and the unit of H is m.

27. A projection system, characterized in that: The projection system comprises a projection device and the laminated glass according to any one of claims 1 to 26, wherein the projection device is disposed on one side of the laminated glass, and the projection device is used to generate projection light.

28. A vehicle, characterized in that: The vehicle comprises a vehicle body, and the laminated glass according to any one of claims 1 to 26, wherein the laminated glass is mounted on the vehicle body.

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