Display system for vehicle

Abstract

To provide a display system for a vehicle which enables a driver of a vehicle to recognize more information by less visual line movement.SOLUTION: A display system for a vehicle has a light source, and a window glass for a vehicle having a concealed layer, wherein in the window glass for the vehicle, a first display region and a second region are defined at positions which overlaps the concealed layer in plan view and can be irradiated with light from the light source, the first display region includes a solid angle when the center of driving visual line is viewed from the center of an eye box within a range of 50 degrees, and the second display region includes a solid angle when the center of driving visual line is viewed from the center of the eye box within a range of 100 degrees.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a vehicle display system.

Background Art

[0002] In a head-up display (hereinafter also referred to as HUD) mounted on a vehicle, improvement in visibility of the HUD image is required, and various technologies for achieving this requirement have been studied. As an example, there is a technology of projecting an image onto a concealment layer provided in a lower region of a vehicle window glass.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Information such as a speedometer is preferably projected as close as possible to the center of the driving line of sight of the driver of the vehicle on the concealment layer. However, since the concealment layer has a narrow vertical width and is horizontally long, in order to project a lot of information, it is necessary to expand the information horizontally on the concealment layer.

[0005] However, when the information is expanded horizontally, some of the information moves away from the center of the driving line of sight. Therefore, in order for the driver to recognize the information, the line of sight must be shifted from the front, which poses a safety problem.

[0006] The present invention has been made in view of the above points, and an object thereof is to provide a vehicle display system that allows a driver of a vehicle to recognize more information with less line-of-sight movement.

Means for Solving the Problems

[0007] A vehicle display system according to an embodiment of the disclosure includes a light source and a vehicle window glass having a concealment layer. In the vehicle window glass, a first display area and a second display area are defined at positions that overlap the concealment layer in a plan view and are capable of irradiating light from the light source. The first display area is included in a range of a solid angle of 50 degrees when viewing the center of the driving line of sight from the center of the instrument box, and the second display area is included in a range of a solid angle of 100 degrees when viewing the center of the driving line of sight from the center of the instrument box.

Advantages of the Invention

[0008] According to an embodiment of the disclosure, it is possible to provide a vehicle display system that allows a driver of a vehicle to recognize more information with less eye movement.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In each drawing, the same reference numerals are given to the same components, and redundant descriptions may be omitted. Also, in each drawing, the size and shape may be partially exaggerated for easy understanding of the content of the present invention.

[0011] Note that the vehicle typically refers to an automobile, but includes trains, ships, airplanes, etc.

[0012] Also, the plan view means viewing the object from the direction of the normal line passing through the center of gravity of the main surface of the object, and the shape seen at that time is called the planar shape.

[0013] Also, the notations “upper” and “lower” refer to the upper and lower sides when the vehicle window glass is attached to the vehicle.

[0014] Also, the outermost peripheral side of a predetermined member is called the “periphery”, and a region having a width inscribed in the “periphery” in a predetermined member is called the “peripheral portion”.

[0015] 〈First Embodiment〉 [Vehicle Display System] FIG. 1 is a schematic diagram illustrating a vehicle display system according to the first embodiment. The vehicle display system 1 shown in FIG. 1 includes a vehicle window glass 10 and a light source 50. The vehicle display system 1 includes, for example, a head-up display system that displays a virtual image on the outside of the vehicle window glass 10. The vehicle display system 1 may include other than a head-up display system such as a projector.

[0016] The vehicle window glass 10 is, for example, a vehicle windshield, and is irradiated with visible light from the light source 50.

[0017] The light source 50 emits visible light of P-polarization or S-polarization toward the vehicle window glass 10. The light source 50 includes, for example, a light emitting unit 51, a first optical system 52, an image display element 53, a second optical system 54, and a concave mirror 55.

[0018] The light emitting unit 51 is an optical component that emits visible light, and is, for example, a light emitting diode, a laser, or the like. The light emitting unit 51 may emit S-polarized light or P-polarized light. When the light emitting unit 51 emits P-polarized light, the light emitting unit 51 may include an optical component such as a polarizing plate or a lens that converts S-polarized light into P-polarized light. The light emitting unit 51 is composed of, for example, three light emitting elements: a red light emitting element, a green light emitting element, and a blue light emitting element.

[0019] The first optical system 52 is composed of, for example, a prism, a lens, or the like that synthesizes a plurality of lights emitted from the light emitting unit 51. The image display element 53 is an element that generates an intermediate image, and is, for example, a liquid crystal display element, an organic light emitting element, or the like. The second optical system 54 is composed of, for example, a lens, a reflection mirror, or the like. The concave mirror 55 is an optical component that reflects an intermediate image on a reflecting surface having a predetermined curvature, and is arranged at the position closest to the vehicle window glass 10 among the optical components arranged on the optical path between the light emitting unit 51 and the vehicle window glass 10.

[0020] In the vehicle display system 1, the light emitted from the light emitting unit 51 reaches the image display element 53 via the first optical system 52, and an intermediate image is formed on the image display element 53. The intermediate image formed by the image display element 53 is enlarged by passing through the second optical system 54 and the concave mirror 55, and is irradiated onto the vehicle window glass 10. The intermediate image irradiated onto the vehicle window glass 10 is reflected by the vehicle window glass 10 and guided to the viewpoint position I of the passenger, and the passenger recognizes a virtual image V (HUD image) of the intermediate image in front of the vehicle window glass 10. The passenger is, for example, the driver of the vehicle.

[0021] In FIG. 1, θ is the incident angle when the light emitted from the light source 50 enters the vehicle window glass 10. When the light entering the vehicle window glass 10 is P-polarized light, the incident angle θ is preferably 57 deg (Brewster angle), but it may be larger than 57 deg or smaller than 57 deg.

[0022] Note that the vehicle display system 1 may have any other configuration as long as it has at least the vehicle window glass 10 and the light source 50. Also, the configuration of the light source 50 may be arbitrary. The vehicle display system 1 may be, for example, a laser scanning method in which laser light is scanned by an optical scanning unit composed of MEMS (Micro Electro Mechanical Systems) or the like.

[0023] [Vehicle window glass] FIG. 2 is a diagram illustrating the vehicle window glass used in the vehicle display system 1. FIG. 2(a) is a diagram schematically showing how the vehicle window glass is viewed from inside the vehicle to the outside, and FIG. 2(b) is a partial cross-sectional view along the line A-A in FIG. 2(a).

[0024] The vehicle window glass 10 includes at least a concealment layer 14. In the example shown in FIG. 2, the vehicle window glass 10 is a laminated glass including a first glass plate 11, a second glass plate 12, an intermediate film 13, and a concealment layer 14. The vehicle window glass 10 can be applied, for example, to a windshield of a vehicle. Hereinafter, the case where the vehicle window glass 10 is laminated glass will be described as an example, but the vehicle window glass 10 may not be laminated glass.

[0025] The first glass plate 11 and the second glass plate 12 are adhered via the intermediate film 13. The first glass plate 11 is disposed on the first side that becomes the inside of the vehicle when the vehicle window glass 10 is attached to the vehicle, and the second glass plate 12 is disposed on the second side that becomes the outside of the vehicle when the vehicle window glass 10 is attached to the vehicle.

[0026] The vehicle window glass 10 may have, for example, a complex curved shape that curves in both the vertical and horizontal directions when attached to the vehicle. However, the complex curved shape is not limited to a shape that curves in the vertical and horizontal directions when attached to the vehicle, but includes shapes that curve in any two or more different directions. Alternatively, the vehicle window glass 10 may have a single curved shape that curves only in the vertical or horizontal direction when attached to the vehicle. However, the single curved shape is not limited to a shape that curves only in the vertical or horizontal direction when attached to the vehicle, but includes shapes that curve only in any one direction.

[0027] The vehicle window glass 10 is preferably curved so as to be convex toward the outside of the vehicle. That is, it is preferable that the second glass plate 12 is curved so as to be convex toward the side opposite to the intermediate film 13, and it is preferable that the first glass plate 11 is curved so as to be convex toward the intermediate film 13 side.

[0028] The first glass plate 11 is an inner glass plate that becomes the inner side (the first side) when the vehicle window glass 10 is attached to the vehicle. The first glass plate 11 may be curved. The first glass plate 11 includes four surfaces 114 located on the side opposite to the intermediate film 13 and three surfaces 113 located on the intermediate film 13 side. The first glass plate 11 includes an upper side, a lower side, and two side sides connecting the upper side and the lower side.

[0029] The second glass plate 12 is an outer glass plate that becomes the outer side (the second side) when the vehicle window glass 10 is attached to the vehicle. The second glass plate 12 may be curved. The second glass plate 12 includes two surfaces 122 located on the intermediate film 13 side and one surface 121 located on the side opposite to the intermediate film 13. Similar to the first glass plate 11, the second glass plate 12 includes, in plan view, an upper side, a lower side, and two side sides connecting the upper side and the lower side.

[0030] When the vehicle window glass 10 has a curved shape, the minimum value of the radius of curvature is preferably 500 mm or more and 100,000 mm or less. The radius of curvature of the first glass plate 11 and the second glass plate 12 may be the same or different. When the radius of curvature of the first glass plate 11 and the second glass plate 12 is different, it is preferable that the radius of curvature of the first glass plate 11 is smaller than the radius of curvature of the second glass plate 12.

[0031] The first glass plate 11 and the second glass plate 12 are a pair of glass plates facing each other, and the intermediate film 13 is located between the pair of glass plates. The first glass plate 11 and the second glass plate 12 are fixed in a state of sandwiching the intermediate film 13. The intermediate film 13 is a film that adheres the first glass plate 11 and the second glass plate 12.

[0032] It is preferable that the outer peripheral side surface of the intermediate film 13 is edge-treated. That is, it is preferable that the outer peripheral side surface of the intermediate film 13 is processed so as not to protrude significantly from the outer peripheral side surfaces of the first glass plate 11 and the second glass plate 12. When the amount of protrusion of the outer peripheral side surface of the intermediate film 13 from the outer peripheral side surfaces of the first glass plate 11 and the second glass plate 12 is 150 μm or less, it is suitable in terms of not impairing the appearance. Details of the first glass plate 11, the second glass plate 12, and the intermediate film 13 will be described later.

[0033] In the example of FIG. 2, the shielding layer 14 is disposed on the three surfaces 113 of the first glass plate 11. The shielding layer 14 is an opaque layer. The shielding layer 14 may be disposed on the two surfaces 122 of the second glass plate 12. Alternatively, the shielding layer 14 may be disposed on both the three surfaces 113 of the first glass plate 11 and the two surfaces 122 of the second glass plate 12.

[0034] The shielding layer 14 can be provided, for example, on a part or all of the lower edge peripheral portion of the vehicle window glass 10 in plan view. The shielding layer 14 may be provided not only on the lower edge peripheral portion of the vehicle window glass 10 in plan view but also on the side edge peripheral portion and the upper edge peripheral portion. In the example of FIG. 2, the shielding layer 14 is provided in a band shape on the lower edge peripheral portion, the side edge peripheral portion, and the upper edge peripheral portion of the vehicle window glass 10 in plan view.

[0035] The width of the shielding layer 14 in plan view may be set as appropriate. The width of the shielding layer 14 in plan view is, for example, about 10 mm or more and 350 mm or less, preferably 20 mm or more and 300 mm or less, more preferably 30 mm or more and 280 mm or less, and still more preferably 30 mm or more and 80 mm or less, except in the information transmission / reception region 19 described later. When the shielding layer 14 is provided not only at the lower side peripheral portion but also at the side side peripheral portion and the upper side peripheral portion, the width of the lower side peripheral portion may be wider than the widths of the side side peripheral portion and the upper side peripheral portion, and the preferable width is as described above.

[0036] The shielding layer 14 is, for example, an opaque colored ceramic layer, and the color is arbitrary, but dark colors such as black, brown, gray, and dark navy are preferable, and black is more preferable from the viewpoint of having a large contrast ratio with the projected image of the HUD and excellent visibility. The shielding layer 14 can be formed, for example, by screen printing or the like a ceramic color paste containing a fusible glass frit containing a black pigment on a glass plate and firing it, but is not limited thereto. The shielding layer 14 may be formed, for example, by screen printing or the like an organic ink containing a black or dark pigment on a glass plate and drying it.

[0037] The presence of the opaque shielding layer 14 in the vehicle window glass 10 can suppress the deterioration of the adhesive for holding the bracket for fixing the information transmission / reception device to the vehicle window glass 10 and the adhesive made of a resin such as urethane for holding the peripheral portion of the vehicle window glass 10 to the vehicle body due to ultraviolet rays, and the appearance is good because the adhesive portion cannot be seen from inside and outside the vehicle.

[0038] The vehicle window glass 10 may have an information transmission / reception area 19. The information transmission / reception area 19 is provided within the opening of the shielding layer 14 of the vehicle window glass 10. The information transmission / reception area 19 is provided, for example, at the upper edge periphery of the vehicle window glass 10. The information transmission / reception area 19 is an area where information devices that handle visible light, such as visible light cameras and illuminance sensors, and information devices that handle infrared light, such as LiDAR (Light Detection And Ranging), transmit and / or receive information. That is, when the vehicle window glass 10 is mounted on a vehicle, an information device can be arranged on the vehicle interior side of the information transmission / reception area 19. In order to achieve high optical quality and enable good transmission and reception of information, no optical reflection layer is provided within the information transmission / reception area 19.

[0039] In the vehicle window glass 10, a first display area R1 and a second display area R2 are defined at positions that overlap the shielding layer 14 in plan view and can be irradiated with light from the light source 50. In the example of FIG. 2, the first display area R1 and the second display area R2 are defined in the lower side area of the vehicle window glass 10. In the example of FIG. 2, two second display areas R2 are defined in the vehicle window glass 10, but the number of second display areas R2 may be one or three or more. There may be a plurality of light sources 50. For example, it is preferable to irradiate the first display area R1 and the second display area R2 with light from different light sources because it is possible to display each piece of information without a time lag.

[0040] The horizontal width of the first display area R1 is, for example, 10 mm or more and 500 mm or less. The horizontal width of the second display area R2 is, for example, 10 mm or more and 650 mm or less. When the second display area R2 is divided into a plurality, the horizontal width of the second display area R2 is the width from the left end to the right end in the vehicle left-right direction in the plurality of second display areas R2.

[0041] Figures 3 and 4 are diagrams for explaining the positions of the first display area and the second display area. Specifically, FIG. 3 is a schematic view of the vehicle window glass 10 viewed from the side direction of the vehicle, and FIG. 4 is a schematic view of the vehicle window glass 10 viewed from the same direction as in FIG. 2(a). In FIG. 3, it is assumed that the vehicle is parked on a horizontal plane.

[0042] In FIG. 3, 200 is an eyeglass case, and 201 indicates the center of the eyeglass case. Regarding the eyeglass case 200, it is as follows. The direction of the light irradiated onto the vehicle window glass 10 can be adjusted in the vertical direction, for example, by a concave mirror 55, so as to conform to the driver's body. The area where the driver's eyes should be located is called an eyeglass case window. The eyeglass case window can be changed in the vertical direction by adjustment such as that of the concave mirror 55, and the entire changeable area is the eyeglass case 200. That is, the area where all adjustable eyeglass case windows overlap is the eyeglass case 200. A configuration may also be adopted in which light is directly irradiated onto the vehicle window glass 10 without using the concave mirror 55.

[0043] As shown in FIG. 3, consider a virtual straight line S drawn parallel to the vehicle front-rear direction and the horizontal plane from the center 201 of the eyeglass case 200. 202 in FIG. 3 is the intersection of the virtual straight line S and the four surfaces 114 of the vehicle window glass 10, and here it is referred to as the driving line of sight center 202.

[0044] Also, in FIG. 4, 203 indicates a range where the solid angle is 50 degrees when viewing the driving line of sight center 202 from the center 201 of the eyeglass case 200. Also, 204 indicates a range where the solid angle is 100 degrees when viewing the driving line of sight center 202 from the center 201 of the eyeglass case 200. The solid angle is a quantity representing the spread of a cone with the center 201 of the eyeglass case 200 as the apex.

[0045] As shown in FIG. 4, the first display area R1 is included in a range 203 with a solid angle of 50 degrees when viewing the driving line-of-sight center 202 from the center 201 of the inbox 200. Also, the second display area R2 is included in a range 204 with a solid angle of 100 degrees when viewing the driving line-of-sight center 202 from the center 201 of the inbox 200. Part or all of the second display area R2 may be included in the range 203.

[0046] The range 203 is a range where information can be judged based on the effective visual field of a human. On the other hand, the range 204 is a range where a human has to rely on intuitive recognition. More specifically, in the range 204, it is difficult to judge information, but the presence of information can be recognized, and it is a range that induces a fixation action for a strong stimulus. The solid angles of the ranges 203 and 204 were studied and calculated by the inventors with reference to "Lectures on Ergonomics of Hard and Soft Design, edited by Toshiki Yamaoka, published by Musashino Art University Publishing Bureau", etc. The range 203 is a stable fixation field of view, a range where information can be recognized without difficulty by eye and head movements, and generally refers to a range within about 50 degrees of solid angle. The range 204 is an auxiliary visual field, a range where the presence of a stimulus can be grasped, and generally refers to a range within about 100 degrees of solid angle.

[0047] The first display area R1 is irradiated with light containing information that may take time for the driver to recognize. The information contained in the light irradiated on the first display area R1 is information with a low warning level, that is, information with low urgency. Information with low urgency is, for example, driving information of the vehicle. Examples of the driving information of the vehicle include information regarding speed and fuel. In order for the driver to judge this information, adjustment of the eye focus is required, but since the first display area R1 is close to the driving line-of-sight center 202, the driver can judge the information displayed in the first display area R1 without moving the line of sight significantly.

[0048] On the other hand, the second display area R2 is irradiated with light containing information that the driver should not take time to recognize. The information contained in the light irradiated to the second display area R2 is information with a high warning level, that is, information with a high degree of urgency. Information with a high degree of urgency is, for example, a warning that alerts of danger. Examples of danger include, for example, the distance to the vehicle ahead, the vehicle behind, or the vehicle on the side is approaching, and the distance to surrounding obstacles is approaching.

[0049] For information with a high degree of urgency, for example, simple figures such as circles and squares are displayed in the second display area R2, and the color, area, or blinking of the displayed figure is changed to allow the driver to intuitively recognize it. For example, the driver can intuitively recognize that the situation is safe if green is displayed in the second display area R2, that attention is required if yellow is displayed, and that danger is approaching if red is displayed. Also, by changing the degree of change in the area of the displayed figure or the degree of blinking, the driver may be allowed to intuitively recognize the degree of danger.

[0050] In order for the driver to recognize this information, no eye focus adjustment is required. That is, although the second display area R2 is away from the center 202 of the driving line of sight, since the information displayed in the second display area R2 is not for the driver to read characters or symbols, the driver can easily recognize the situation without moving the line of sight to a specific position. That is, in order for the driver to recognize the information irradiated to the second display area R2, it is not necessary to divert the line of sight from the front of the vehicle, so it is possible to recognize the information while ensuring safety. The luminance of the light reflected in the second display area R2 is preferably 30 cd / m 2 or more, more preferably 100 cd / m 2 or more, and even more preferably 250 cd / m 2 or more. With such luminance, it is possible to sufficiently arouse the driver's attention.

[0051] In this way, by changing the type of information and the display method to be displayed in the first display area R1 and the second display area R2, even if information is displayed in a wider area on the concealment layer 14, the driver of the vehicle can recognize more information with fewer eye movements. Thereby, the safety when driving the vehicle is improved.

[0052] Here, the first glass plate 11, the second glass plate 12, and the intermediate film 13 will be described in detail.

[0053] 〔Glass plate〕 The first glass plate 11 and the second glass plate 12 may be either inorganic glass or organic glass. As the inorganic glass, for example, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, quartz glass, etc. are used without particular limitation. The second glass plate 12 located outside the vehicle window glass 10 is preferably inorganic glass from the viewpoint of scratch resistance, and soda-lime glass is preferable from the viewpoint of formability. When the first glass plate 11 and the second glass plate 12 are soda-lime glass, clear glass, green glass containing a predetermined amount or more of iron component, and dark green glass can be preferably used. Further, glass that absorbs ultraviolet rays or infrared rays may be used. Furthermore, although transparency is preferable, a glass plate colored to such an extent that transparency is not impaired may also be used. Also, by using borosilicate glass for the second glass plate 12, the strength of the vehicle window glass 10 against flying stones can be improved.

[0054] The inorganic glass may be either unstrengthened glass or strengthened glass. The unstrengthened glass is obtained by forming molten glass into a flat plate shape and slowly cooling it. The strengthened glass is obtained by forming a compressive stress layer on the surface of the unstrengthened glass. In the case of strengthened glass, the residual stress can be reduced by distributing the stress isotropically.

[0055] The tempered glass may be either physically tempered glass such as air-cooled tempered glass or chemically tempered glass. In the case of physically tempered glass, for example, by operations other than slow cooling, such as rapidly cooling a uniformly heated glass plate in bending forming from a temperature near the softening point, a compressive stress layer is generated on the glass surface due to the temperature difference between the glass surface and the glass interior, thereby strengthening the glass surface.

[0056] In the case of chemically tempered glass, for example, after bending forming, the glass surface can be strengthened by generating compressive stress on the glass surface by means of an ion exchange method or the like.

[0057] On the other hand, examples of the organic glass material include polycarbonate, acrylic resins such as polymethyl methacrylate, transparent resins such as polyvinyl chloride and polystyrene.

[0058] The first glass plate 11 and the second glass plate 12 are not limited to trapezoidal or rectangular shapes, and may have various shapes and shapes processed with curvatures. For the bending forming of the first glass plate 11 and the second glass plate 12, a gravity forming method, a press forming method, a roller forming method or the like may be used. The forming method of the first glass plate 11 and the second glass plate 12 is not particularly limited either. For example, in the case of inorganic glass, a glass plate formed by a float method or the like is preferable.

[0059] The thickness of the second glass plate 12 is preferably 1.1 mm or more and 3 mm or less at the thinnest part. When the thickness of the second glass plate 12 is 1.1 mm or more, the strength such as anti-chip performance is sufficient, and when it is 3 mm or less, the mass of the vehicle window glass 10 does not become too large, which is preferable in terms of the fuel consumption of the vehicle. The thickness of the second glass plate 12 is more preferably 1.8 mm or more and 2.8 mm or less at the thinnest part, further preferably 1.8 mm or more and 2.6 mm or less, still further preferably 1.8 mm or more and 2.2 mm or less, and still further preferably 1.8 mm or more and 2.1 mm or less.

[0060] The thickness of the first glass plate 11 is preferably 0.3 mm or more and 2.3 mm or less. When the thickness of the first glass plate 11 is 0.3 mm or more, the handling property is good, and when it is 2.3 mm or less, the mass does not become too large.

[0061] Also, when the thickness of the first glass plate 11 is not appropriate, if two particularly deeply curved glasses are formed as the first glass plate 11 and the second glass plate 12, a mismatch occurs in the shapes of the two, which greatly affects the glass quality such as the residual stress after pressure bonding.

[0062] However, by setting the thickness of the first glass plate 11 to 0.3 mm or more and 2.3 mm or less, the glass quality such as residual stress can be maintained. Setting the thickness of the first glass plate 11 to 0.3 mm or more and 2.3 mm or less is particularly effective for maintaining the glass quality in deeply curved glass. The thickness of the first glass plate 11 is more preferably 0.5 mm or more and 2.2 mm or less, and even more preferably 0.7 mm or more and 2.1 mm or less. Within this range, the above effects become more prominent. The thickness of the first glass plate 11 is even more preferably 1.0 mm or more, even more preferably 1.3 mm or more, and even more preferably 1.5 mm or more. Also, the thickness of the first glass plate 11 is even more preferably 2.0 mm or less, and even more preferably 1.9 mm or less.

[0063] The first glass plate 11 and / or the second glass plate 12 do not have a constant thickness, and the thickness may vary from place to place as needed. For example, when the vehicle window glass 10 is a windshield, either one or both of the first glass plate 11 and the second glass plate 12 may have a cross-sectional wedge shape in which the thickness increases from the lower side to the upper side of the windshield in a state where the windshield is attached to the vehicle. In this case, if the thickness of the intermediate film 13 is constant, the total wedge angle of the first glass plate 11 and the second glass plate 12 varies, for example, in the range of more than 0 mrad and 1.0 mrad or less.

[0064] A film having water repellency, ultraviolet and infrared cut functions, a film having low reflection characteristics, or a film having low emissivity characteristics may be provided on the outer side of the first glass plate 11 and / or the second glass plate 12. Further, a film such as ultraviolet and infrared cut, low emissivity characteristics, visible light absorption, or coloring may be provided on the side of the first glass plate 11 and / or the second glass plate 12 that is in contact with the interlayer film 13.

[0065] When the first glass plate 11 and the second glass plate 12 are curved inorganic glasses, the first glass plate 11 and the second glass plate 12 are bent after being formed by the float method or the like and before being adhered by the interlayer film 13. The bending is performed by heating the glass to soften it. The heating temperature of the glass during bending is preferably controlled in the range of approximately 550°C to 700°C.

[0066] 〔Interlayer film〕 As the interlayer film 13, thermoplastic resins are often used. For example, plasticized polyvinyl acetal resins, plasticized polyvinyl chloride resins, saturated polyester resins, plasticized saturated polyester resins, polyurethane resins, plasticized polyurethane resins, ethylene-vinyl acetate copolymer resins, ethylene-ethyl acrylate copolymer resins, cycloolefin polymer resins, ionomer resins, and other thermoplastic resins conventionally used for this type of application can be mentioned. Further, a resin composition containing a modified block copolymer hydride described in Japanese Patent No. 6065221 can also be preferably used.

[0067] Among these, plasticized polyvinyl acetal resins are preferably used because they are excellent in the balance of various properties such as transparency, weather resistance, strength, adhesion, puncture resistance, impact energy absorption, moisture resistance, heat insulation, and sound insulation. These thermoplastic resins may be used alone or in combination of two or more. The "plasticized" in the above plasticized polyvinyl acetal resin means that it is plasticized by the addition of a plasticizer. The same applies to other plasticized resins.

[0068] However, when enclosing a specific substance in the interlayer 13, depending on the type of the substance to be enclosed, it may deteriorate due to a specific plasticizer. In such a case, it is preferable to use a resin that substantially does not contain the plasticizer. Examples of the resin that does not contain a plasticizer include ethylene-vinyl acetate copolymer (EVA)-based resins.

[0069] Examples of the polyvinyl acetal-based resin include polyvinyl formal resin obtained by reacting polyvinyl alcohol (PVA) with formaldehyde, polyvinyl acetal-based resin in the narrow sense obtained by reacting PVA with acetaldehyde, polyvinyl butyral (PVB) resin obtained by reacting PVA with n-butyl aldehyde, etc. In particular, PVB is preferable because it is excellent in the balance of various properties such as transparency, weather resistance, strength, adhesiveness, puncture resistance, impact energy absorption, moisture resistance, heat shielding property, and sound insulation property. These polyvinyl acetal-based resins may be used alone or in combination of two or more.

[0070] However, the material forming the interlayer 13 is not limited to thermoplastic resins. Further, the interlayer 13 may contain functional particles such as infrared absorbers, ultraviolet absorbers, and luminescent agents. Further, the interlayer 13 may have a colored portion called a shade band. Examples of the coloring pigment used to form the colored portion include those that can be used for plastics, and the addition amount may be adjusted so that the visible light transmittance of the colored portion is 40% or less. For example, organic coloring pigments such as azo-based, phthalocyanine-based, quinacridone-based, perylene-based, perinone-based, dioxazine-based, anthraquinone-based, and isoindolin-based, and inorganic coloring pigments such as oxides, hydroxides, sulfides, chromic acids, sulfates, carbonates, silicates, phosphates, arsenates, ferrocyanides, carbon, and metal powders. These coloring pigments may be used alone or in combination of two or more. Further, the shade band of the interlayer 13 may be provided in the lower side region of the vehicle window glass 10 to serve as the concealment layer 14.

[0071] The intermediate film 13 may have a plurality of layers. For example, the intermediate film 13 may include three or more layers. For example, if the intermediate film is formed from three or more layers and the shear modulus of any layer except the layers on both sides is made smaller than the shear modulus of the layers on both sides by adjusting a plasticizer or the like, the sound insulation performance of the vehicle window glass 10 can be improved. In this case, the shear moduli of the layers on both sides may be the same or different.

[0072] The film thickness of the intermediate film 13 is preferably 0.5 mm or more at the thinnest part. When the intermediate film 13 has a plurality of layers, the film thickness of the intermediate film 13 is the total film thickness of each layer. When the film thickness of the thinnest part of the intermediate film 13 is 0.5 mm or more, the impact resistance and penetration resistance required for the vehicle window glass are sufficient. Further, the film thickness of the intermediate film 13 is preferably 2 mm or less at the thickest part. When the maximum value of the film thickness of the intermediate film 13 is 2 mm or less, the mass of the vehicle window glass does not become too large. The maximum value of the film thickness of the intermediate film 13 is more preferably 1.5 mm or less, and even more preferably 1.2 mm or less.

[0073] Also, when the intermediate film 13 has a plurality of layers, each layer included in the intermediate film 13 is preferably formed of the same material, but may be formed of different materials. However, from the viewpoint of the adhesiveness to the first glass plate 11 and the second glass plate 12, or functional materials incorporated into the vehicle window glass 10, etc., it is desirable to use the above materials for 50% or more of the film thickness of the intermediate film 13.

[0074] The intermediate film 13 does not have a constant film thickness, and the film thickness may vary from place to place as required. For example, when the vehicle window glass 10 is a windshield, the intermediate film 13 may have a cross-sectional wedge shape in which the film thickness increases from the lower side to the upper side of the windshield in a state where the windshield is attached to the vehicle. In this case, if the plate thicknesses of the first glass plate 11 and the second glass plate 12 are constant, the wedge angle of the intermediate film 13 changes, for example, in a range greater than 0 mrad and 1.0 mrad or less. Thereby, the double image of the HUD image projected on the viewing area of the vehicle window glass 10 can be suppressed.

[0075] To produce the intermediate film 13, for example, the above resin material serving as the intermediate film is appropriately selected and extruded and molded in a heat-melted state using an extruder. The extrusion conditions such as the extrusion speed of the extruder are set to be uniform. Thereafter, the extruded resin film is stretched in an arbitrary direction as necessary, for example, to give curvatures to the upper and lower sides in accordance with the design of the vehicle window glass, whereby the intermediate film 13 is completed.

[0076] 〔Vehicle window glass〕 The total thickness of the vehicle window glass 10 is preferably 2.8 mm or more and 10 mm or less. If the total thickness of the vehicle window glass 10 is 2.8 mm or more, sufficient rigidity can be ensured. Also, if the total thickness of the vehicle window glass 10 is 10 mm or less, sufficient transmittance can be obtained and haze can be reduced. The total thickness of the vehicle window glass 10 is preferably 7 mm or less, more preferably 6 mm or less, and even more preferably 5 mm or less.

[0077] On at least one side of the vehicle window glass 10, the displacement between the first glass plate 11 and the second glass plate 12 is preferably 1.5 mm or less, and more preferably 1 mm or less. Here, the displacement between the first glass plate 11 and the second glass plate 12 is the amount of displacement between the outer peripheral side surfaces of the first glass plate 11 and the second glass plate 12 in a plan view.

[0078] On at least one side of the vehicle window glass 10, when the displacement between the first glass plate 11 and the second glass plate 12 is 1.5 mm or less, it is suitable in that the appearance is not impaired. On at least one side of the vehicle window glass 10, when the displacement between the first glass plate 11 and the second glass plate 12 is 1.0 mm or less, it is more suitable in that the appearance is not impaired.

[0079] 〔Manufacturing method of vehicle window glass〕 To manufacture the vehicle window glass 10, first, prepare a first glass plate 11 having three sides 113 and four sides 114, an intermediate film 13, and a second glass plate 12 having one side 121 and two sides 122. The thicknesses of the first glass plate 11 and the second glass plate 12 are constant. Also, the thickness of the intermediate film 13 is constant. Note that a first glass plate 11 or a second glass plate 12 having a cross-sectional wedge shape, or an intermediate film 13 having a cross-sectional wedge shape may be prepared.

[0080] Next, form a concealment layer 14 on the three sides 113 of the first glass plate 11. When the concealment layer 14 is a colored ceramic layer, for example, it can be formed by applying a ceramic color paste to the three sides 113 of the first glass plate 11 by screen printing or the like and then firing.

[0081] Next, for example, after the step of forming the concealment layer 14, bend and form the first glass plate 11 and the second glass plate 12. For the bending and forming of the first glass plate 11 and the second glass plate 12, for example, a press forming method can be used. Specifically, prepare a molding die with unevenness according to the final shape of the vehicle window glass 10. After heating the first glass plate 11 and the second glass plate 12 to a predetermined temperature to soften them, use this molding die for press working to bend and form the first glass plate 11 and the second glass plate 12. Note that for the bending and forming of the first glass plate 11 and the second glass plate 12, a gravity forming method, a roller forming method, or the like may be used. When the material for forming the concealment layer 14 does not require firing at a high temperature, the concealment layer may be formed on the glass surface by, for example, an inkjet method after bending and forming the first glass plate 11 and the second glass plate 12.

[0082] In the vehicle window glass 10, the difference in thickness between the first glass plate 11 and the second glass plate 12 is preferably 0.3 mm or less, and more preferably 0.2 mm or less. It is particularly preferable that the thicknesses of the first glass plate 11 and the second glass plate 12 are the same. The smaller the difference in thickness between the first glass plate 11 and the second glass plate 12, the closer the behavior during bending and forming, so that perspective distortion can be reduced.

[0083] Next, stretch the interlayer 13 as necessary. Then, place the interlayer 13 between the three surfaces 113 of the first glass plate 11 and the two surfaces 122 of the second glass plate 12, and press-bond them to form a laminate. Then, for example, place this laminate in a rubber bag, a rubber chamber, a resin bag, etc., and bond it under vacuum controlled in the gauge pressure range of -100 kPa to -65 kPa and at a temperature controlled in the range of about 70°C to 110°C. The heating conditions, temperature conditions, and lamination method are appropriately selected.

[0084] Furthermore, for example, by performing a pressure-bonding treatment of heating and pressurizing under conditions controlled in the temperature range of 100°C to 150°C and the absolute pressure range of 0.6 MPa to 1.5 MPa, a vehicle window glass 10 with more excellent durability can be obtained. However, in some cases, considering the simplification of the process and the characteristics of the materials encapsulated in the vehicle window glass 10, this heating and pressurizing step may not be used. Through the above steps, the vehicle window glass 10 is completed.

[0085] Also, the second glass plate 12 may be pre-bent and formed in advance, and the vehicle window glass 10 may be manufactured by bending the flat first glass plate 11 sandwiched with the interlayer 13 along the shape of the second glass plate 12 and bonding them, that is, by using a so-called cold bending method.

[0086] Between the first glass plate 11 and the second glass plate 12, in addition to the interlayer 13, within a range that does not impair the effects of the present application, there may be films or devices having functions such as heating wires, infrared reflection, light emission, power generation, light control, touch panels, visible light reflection, scattering, decoration, absorption, etc. Also, the surface of the vehicle window glass 10 may have a film having functions such as anti-fogging, water repellency, heat insulation, low reflection, etc. Further, the three surfaces 113 of the first glass plate 11 and the two surfaces 122 of the second glass plate 12 may have a film having functions such as heat insulation and heat generation.

[0087] <Modification Example> FIG. 5 is a cross-sectional view showing a first modification example of a vehicle window glass used in the vehicle display system 1. The vehicle window glass 10A shown in FIG. 5 is different from the vehicle window glass 10 in that the concealment layer 14 is replaced by the concealment layer 24.

[0088] In the vehicle window glass 10A shown in FIG. 5, the shielding layer 24 is a colored intermediate film having light-shielding properties. The colored intermediate film can be produced by coloring the materials exemplified in the description of the intermediate film in the first embodiment. Specifically, a colored intermediate film is obtained by incorporating a colorant into a composition mainly containing a thermoplastic resin. The colored intermediate film may contain a plasticizer for adjusting the glass transition point. The colored intermediate film may be laminated on the intermediate film 13 in a thin film form of 20 μm or more and 70 μm or less.

[0089] The colorant is not particularly limited as long as it can reduce the visible light transmittance, and examples include dyes, inorganic pigments, and organic pigments. Among these, inorganic pigments or organic pigments are preferable because there is less risk of fading due to long-term use, and inorganic pigments are more preferable because of their excellent light resistance.

[0090] Examples of organic pigments include black pigments such as aniline black and red pigments such as alizarin lake. Examples of inorganic pigments include carbon-based pigments and metal oxide-based pigments. For example, black pigments such as carbon black, ivory black, mars black, peach black, lamp black, magnetite-type iron tetroxide, brown pigments such as amber, burton amber, yellow walker, van dyke brown, sienna, burton sienna, red pigments such as bengara, molybdenum red, cadmium red, orange pigments such as red lead yellow, chrome vermilion, blue pigments such as ultramarine, dark blue, cobalt blue, cerulean blue, green pigments such as chromium oxide, pyridian, emerald green, cobalt green, yellow pigments such as lead yellow, cadmium yellow, yellow iron oxide, titanium yellow, purple pigments such as manganese violet, mineral violet, etc. These colorants may be used alone or in combination of two or more.

[0091] The colored intermediate film may further contain one or more of various additives such as infrared absorbers, ultraviolet absorbers, fluorescent agents, adhesion regulators, coupling agents, surfactants, antioxidants, heat stabilizers, light stabilizers, dehydrating agents, defoaming agents, antistatic agents, and flame retardants.

[0092] The method for forming the colored intermediate film is not particularly limited. For example, the colorless thermoplastic resin composition to be the intermediate film 13 and the colored thermoplastic resin composition to be the shielding layer 24 are each prepared in advance. Then, the colorless thermoplastic resin composition and the colored thermoplastic resin composition are joined, for example, in a sheet forming die, and formed into a sheet shape while joining the two resin compositions. Thereby, the intermediate film 13 and the shielding layer 24 are obtained.

[0093] Alternatively, a cut portion may be provided in a part of the intermediate film 13 formed of the colorless thermoplastic resin composition, and the shielding layer 24 may be formed by co-extruding a colored thermoplastic resin into the cut portion. Further, the colorless thermoplastic resin composition and the colored thermoplastic resin composition are each formed into a sheet having a predetermined size and shape, and the intermediate film 13 and the shielding layer 24 can also be obtained by laminating them in the plane direction.

[0094] The colored intermediate film may be produced by a method of forming a dark-colored printing layer on the surface of the colorless thermoplastic resin composition. As a method for forming the dark-colored printing layer, a normal printing method using a colored material on a resin substrate can be applied. Examples of the colored material include organic pigments and inorganic pigments similar to the above-mentioned colorants. In this case, since the printing layer does not require durability at a temperature near the softening point of glass like the ceramic shielding layer, for example, an organic pigment containing carbon black can be used.

[0095] Thus, the shielding layer is not limited to the colored ceramic layer exemplified in the first embodiment, and may be a colored intermediate film. Further, the shielding layer may be a colored film having light-shielding properties, a combination of two or more of a colored film, a colored intermediate film, and a colored ceramic layer, or a layer having a light control function. Examples of the base material of the colored film include polyethylene terephthalate, polycarbonate, acrylic, etc. Further, the colored film may be integrated with an infrared reflection film or the like. By using a colored intermediate film or the like as the shielding layer, the visibility of the projected image can be improved as in the first embodiment.

[0096] FIG. 6 is a cross-sectional view showing a second modification of the vehicle window glass used in the vehicle display system 1. The vehicle window glass 10B shown in FIG. 6 is different from the vehicle window glass 10 in that an optical reflection layer 15 is added.

[0097] The optical reflection layer 15 is provided in the first display area R1 and / or the second display area R2. The optical reflection layer 15 is a layer that reflects the light irradiated from the light source 50. The optical reflection layer 15 is transparent to visible light. In the example of FIG. 6, the optical reflection layer 15 is disposed on the four surfaces 114 of the first glass plate 11. The optical reflection layer 15 may be provided at least in the first display area R1 and / or the second display area R2, or may be provided on the entire surface of the vehicle window glass 10.

[0098] When the light from the light source 50 is P-polarized light, the optical reflection layer 15 is a P-polarized light reflection layer. In the P-polarized light reflection layer, when visible light of P-polarization is incident at an incident angle of 55° or more and 75° or less, the visible light reflectance is preferably 10% or more and 30% or less. If the visible light reflectance is 10% or more, the visibility of the HUD image can be improved. If the visible light reflectance is 30% or less, the reflection of the objects arranged around can be reduced. Further, in order to realize a suitable vehicle display system while reducing the reflection of the objects arranged around, the visible light reflectance of the optical reflection layer 15 at an incident angle of 55° or more and 75° or less is preferably 12% or more and 28% or less, more preferably 15% or more and 26% or less.

[0099] The visible light reflectance of the P-polarized light reflection layer is measured by measuring the spectral reflectance described in ISO9050:2003 with P-polarized light in the visible wavelength range as incident light at an incident angle θ of 55° or more and 75° or less, and further calculated according to the calculation method of the visible light reflectance described in ISO9050:2003 based on this measurement.

[0100] As the P-polarized light reflecting layer, for example, a birefringence interference type polarizer composed of a polymer multilayer film containing two or more types of polymers with different refractive indices, a polarizer having a fine concavo-convex structure called a wire grid type, a film including a polarizer composed of a cholesteric liquid crystal layer, etc. can be adopted. When using a P-polarized light reflecting film as the P-polarized light reflecting layer, the thickness of the P-polarized light reflecting film is preferably 25 μm or more and 200 μm or less. The thickness of the P-polarized light reflecting film is more preferably 150 μm or less, and even more preferably 100 μm or less.

[0101] When using a P-polarized light reflecting coat as the P-polarized light reflecting layer, it is preferable in terms of better visibility at low luminance such as at night and with a wider viewing angle compared to the case of using a P-polarized light reflecting film. Also, when using a P-polarized light reflecting coat, it is preferable in terms of easy control of the film thickness and the fact that the reflecting surface tends to be smooth, making it difficult for the HUD image to be distorted.

[0102] When using a P-polarized light reflecting coat as the P-polarized light reflecting layer, the film thickness of the P-polarized light reflecting coat is, for example, 50 nm or more and 500 nm or less. The P-polarized light reflecting coat can be formed on the surface of a glass plate, for example, by a sputtering method, a CVD method, or the like.

[0103] Examples of the P-polarized light reflecting coat include a film having a laminated structure of a high refractive index film / low refractive index film, an infrared reflecting film having a laminated structure of a metal film such as silver and a dielectric film as an example, and a Low-e film composed of a transparent conductive film such as ITO. Among these, a film having a laminated structure of a high refractive index film / low refractive index film is preferable in terms of being able to maintain a high P-polarized light reflectance. When the high refractive index film / low refractive index film has a two-layer structure, for example, the high refractive index film and the low refractive index film are laminated in this order on the four surfaces 114 of the first glass plate 11. When the high refractive index film / low refractive index film has a three-layer or more structure, the high refractive index film and the low refractive index film are alternately laminated on the four surfaces 114 of the first glass plate 11 in an arbitrary order.

[0104] The refractive index of the above high refractive index film is 1.8 or more, or 1.9 or more, or 2.0 or more, or 2.1 or more at a wavelength of 550 nm, and preferably 2.5 or less. The refractive index of the above low refractive index film is typically less than 1.8, or 1.7 or less, or 1.6 or less at a wavelength of 550 nm, and preferably 1.2 or more.

[0105] Specifically, the high refractive index film preferably contains at least one of the following: oxides of Zr, Nb, Sn; mixed oxides of Ti, Zr, Nb, Si, Sb, Sn, Zn, In; nitrides of Si, Zr; and mixed nitrides of Si, Zr. Also, the low refractive index film preferably contains at least one of silicon oxide, silicon oxynitride, silicon oxycarbide, or a mixture. Examples of the mixture include a mixed oxide of silicon and aluminum and a mixed oxide of silicon and zirconium.

[0106] The first layer of the high refractive index film is optionally composed of one or more sub-layers. The thickness (geometric film thickness) of the first layer of the high refractive index film is preferably 50 nm or more and 100 nm or less, particularly preferably 60 nm or more and 80 nm or less. The first layer of the low refractive index film is optionally composed of one or more sub-layers. The thickness (geometric film thickness) of the first layer of the low refractive index film is preferably 70 nm or more and 160 nm or less, particularly preferably 100 nm or more and 140 nm or less.

[0107] When the light from the light source 50 is S-polarized light, the optical reflection layer 15 is an S-polarized light reflection layer. In the S-polarized light reflection layer, when visible light with an incident angle of 55° or more and 75° or less and S-polarized light is incident, the visible light reflectance is preferably 18% or more and 30% or less. If the visible light reflectance is 18% or more, the visibility of the HUD image can be improved. If the visible light reflectance is 30% or less, the reflection of objects arranged around can be reduced. Further, in order to realize a suitable HUD system while reducing the reflection of objects arranged around, the visible light reflectance of the optical reflection layer 15 at an incident angle of 55° or more and 75° or less is preferably 12% or more and 28% or less, more preferably 15% or more and 26% or less.

[0108] The visible light reflectance of the S-polarization reflective layer is obtained by measuring the spectral reflectance described in ISO9050:2003 with S-polarized light at visible wavelengths as the incident light when the incident angle θ is 55 deg or more and 75 deg or less, and further calculating it according to the calculation method of visible light reflectance described in ISO9050:2003 based on this measurement. Examples of the S-polarization reflective layer include an optical interference film in which a high refractive index material such as TiO2 and a low refractive index material such as SiO2 are alternately stacked. Further, the S-polarization reflective layer may be a film adhered to the glass plate with an adhesive layer.

[0109] The optical reflective layer 15 may be a layer that is transparent to visible light and has a hologram function.

[0110] In this way, by providing the optical reflective layer 15 that reflects the light irradiated from the light source 50 in the first display area R1 and / or the second display area R2, the brightness of the image recognized by the driver can be improved.

[0111] FIG. 7 is a diagram showing a modification 3 of the vehicle window glass used in the vehicle display system 1, and is a diagram schematically showing a state of viewing the vehicle window glass from inside the vehicle to the outside.

[0112] In the vehicle window glass 10C shown in FIG. 7, the area where the second display area R2 is defined is different from the vehicle window glass 10. In the vehicle window glass 10C, the second display area R2 is defined at a position closer to the driving line of sight center 202 than the vehicle window glass 10.

[0113] In this way, the second display area R2 does not have to be provided over the entire concealment layer 14. In the vehicle window glass 10C, since the second display area R2 is defined at a position closer to the driving line of sight center 202, the driver can more easily recognize the information displayed in the second display area R2. Further, light can be easily irradiated from one light source 50 to the first display area R1 and the second display area R2.

[0114] FIG. 8 is a diagram showing a fourth modification of the vehicle window glass used in the vehicle display system 1, and is a diagram schematically showing a state of viewing the vehicle window glass from inside the vehicle to the outside.

[0115] The vehicle window glass 10D shown in FIG. 8 is different from the vehicle window glass 10 in that the region where the second display region R2 is defined is different. In the vehicle window glass 10D, the second display region R2 is defined not only on the shielding layer 14 in the lower side region of the vehicle window glass 10 but also on the shielding layer 14 in the side region of the vehicle window glass 10. The second display region R2 may be defined only on the shielding layer 14 in the side region of the vehicle window glass 10.

[0116] Thus, the second display region R2 may be defined on the shielding layer 14 in the side region of the vehicle window glass 10. Thereby, a wider region on the shielding layer 14 can be used as a display region.

[0117] FIG. 9 is a diagram showing a fifth modification of the vehicle window glass used in the vehicle display system 1, and is a diagram schematically showing a state of viewing the vehicle window glass from inside the vehicle to the outside.

[0118] The vehicle window glass 10E shown in FIG. 9 is different from the vehicle window glass 10 in that the third display region R3 is added. The third display region R3 is defined at a position that does not overlap the shielding layer 14 in plan view and can be irradiated with light from the light source 50. Further, the third display region R3 is included in a range where the solid angle is 50 degrees when viewing the driving line-of-sight center 202 from the center 201 of the glove box 200.

[0119] Thus, in addition to the first display region R1 and the second display region R2 on the shielding layer 14, the third display region R3 may be defined on a transparent region that does not overlap the shielding layer 14. Thereby, a wider region can be used as a display region.

[0120] FIG. 10 is a schematic diagram showing a modification of the vehicle display system. FIG. 11 is a cross-sectional view showing a modification of the vehicle display system. Note that FIG. 11 schematically shows the light source 50A and the like in a cross-sectional view taken along the line B-B of the vehicle window glass 10 in FIG. 10.

[0121] The vehicle display system 1A shown in FIGS. 10 and 11 is different from the vehicle display system 1 in that a light source 50A is added.

[0122] In the vehicle display system 1A, the light source 50 can irradiate light to the first display area R1 and the second display area R2 located on the right side of the first display area R1 in FIG. 10. In contrast, the light source 50A can irradiate light to the second display area R2 located on the left side of the first display area R1 in FIG. 10. The light source 50A may have the same configuration as the light source 50 shown in FIG. 1, or may have a different configuration. The light source 50A does not have to be a HUD unit. An example of the light source 50A will be described with reference to FIG. 11.

[0123] As shown in FIG. 11, the light source 50A can be arranged near the vehicle window glass 10 inside the vehicle. In the example shown in FIG. 11, the light source 50A is arranged on the dashboard 80 at a position where it can irradiate light to the vehicle window glass 10. It is preferable that a light shielding plate 90 that blocks direct light from the light source 50A from the driver is provided on the dashboard 80. Thereby, the light source 50A can emit strong light.

[0124] The light source 50A is, for example, an LED light source including a plurality of types of light emitting diodes (LEDs) having different emission colors, and can emit a plurality of colors by a combination of lit LEDs. As the light source 50A, known light emitting members other than the above can be used, for example, organic EL (Organic electroluminescence Light Emitting Diode: OLED), etc. As the light source 50A, a projector, a smartphone, etc. may be used.

[0125] Thus, the vehicle display system 1A has a plurality of light sources. For example, when one light source 50 cannot irradiate light to the entire concealment layer 14, by adding the light source 50A, a wider range of the concealment layer 14 can be irradiated with light. The vehicle display system 1A may have three or more light sources.

[0126] Although the preferred embodiments and the like have been described in detail above, the present invention is not limited to the above-described embodiments and the like, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope described in the claims.

[0127] In addition to the above embodiments, the following additional remarks are disclosed. (Supplementary Note 1) A vehicle display system having a light source and a vehicle window glass provided with a concealment layer, wherein in the vehicle window glass, a first display area and a second display area are defined at positions that overlap the concealment layer in a plan view and are capable of irradiating light from the light source, the first display area is included in a range of a solid angle of 50 degrees when viewing the center of the driving line of sight from the center of the glove box, and the second display area is included in a range of a solid angle of 100 degrees when viewing the center of the driving line of sight from the center of the glove box. (Supplementary Note 2) Light including information that may take time for the driver to recognize is irradiated onto the first display area, and light including information that should not take time for the driver to recognize is irradiated onto the second display area, for the vehicle display system according to Supplementary Note 1. (Supplementary Note 3) The first display area and the second display area are defined in the lower side area of the vehicle window glass, for the vehicle display system according to Supplementary Note 1 or 2. (Supplementary Note 4) The second display area is defined in the side area of the vehicle window glass, for the vehicle display system according to any one of Supplementary Notes 1 to 3. (Supplementary Note 5) The light source emits light that is P-polarized or S-polarized, for the vehicle display system according to any one of Supplementary Notes 1 to 4. (Supplementary Note 6) Having a plurality of the light sources, for the vehicle display system according to any one of Supplementary Notes 1 to 5. (Supplementary Note 7) The vehicle display system according to any one of Appendices 1 to 6, wherein the concealment layer is a colored ceramic layer, a colored intermediate film, or a colored film. (Appendix 8) The vehicle display system according to any one of Appendices 1 to 7, wherein an optical reflection layer that reflects light irradiated from the light source is provided in the first display area and / or the second display area. (Appendix 9) The vehicle display system according to any one of Appendices 1 to 8, wherein the horizontal width of the first display area is 10 mm or more and 500 mm or less. (Appendix 10) The vehicle display system according to any one of Appendices 1 to 9, wherein the horizontal width of the second display area is 10 mm or more and 650 mm or less. (Appendix 11) The vehicle window glass further includes a third display area defined at a position that does not overlap the concealment layer in a plan view and is capable of irradiating light from the light source The vehicle display system according to any one of Appendices 1 to 10, wherein the third display area is included in a range of a solid angle of 50 degrees when viewing the center of the driving line of sight from the center of the instrument box. (Appendix 12) The luminance of the light reflected in the second display area is 30 cd / m 2 or more. The vehicle display system according to any one of Appendices 1 to 11.

Explanation of Signs

[0128] 1, 1A Vehicle display system 10, 10A, 10B, 10C, 10D, 10E Vehicle window glass 11 First glass plate 1133 Surface 1144 Surface 12 Second glass plate 1211 Surface 1222 Surface 13 Intermediate film 14, 24 Concealment layer 15 Optical reflection layer 19 Information transmission / reception area 50, 50A light source 51 Light-emitting part 52 First optical system 53 Image display element 54 Second optical system 55 Concave mirror 80 Dashboard 90 Light shield 200 Eyebox 201 Center of the eyebox 202 Center of the driving line of sight 203, 204 Range R1 First display area R2 Second display area R3 Third display area S Virtual straight line

Claims

1. A vehicle window glass having a light source and a shielding layer, wherein in the vehicle window glass, a first display area and a second display area are defined at positions that overlap the shielding layer in plan view and are capable of irradiating light from the light source, the first display area is included in a range of a solid angle of 50 degrees when viewing the center of the driving line of sight from the center of the glove box, the second display area is included in a range of a solid angle of 100 degrees when viewing the center of the driving line of sight from the center of the glove box, a vehicle display system.

2. Light including information that may take time for the driver to recognize is irradiated to the first display area, Light including information that should not take time for the driver to recognize is irradiated to the second display area, the vehicle display system according to claim 1.

3. The first display area and the second display area are defined in the lower side area of the vehicle window glass, the vehicle display system according to claim 1 or 2.

4. The second display area is defined in the side area of the vehicle window glass, the vehicle display system according to claim 1 or 2.

5. The light source emits light of P polarization or S polarization, the vehicle display system according to claim 1 or 2.

6. Having a plurality of the light sources, the vehicle display system according to claim 1 or 2.

7. The shielding layer is a colored ceramic layer, a colored intermediate film, or a colored film, the vehicle display system according to claim 1 or 2.

8. An optical reflection layer for reflecting light irradiated from the light source is provided in the first display area and / or the second display area, the vehicle display system according to claim 1 or 2.

9. The horizontal width of the first display area is 10 mm or more and 500 mm or less, the vehicle display system according to claim 1 or 2.

10. The horizontal width of the second display area is 10 mm or more and 650 mm or less, the vehicle display system according to claim 1 or 2.

11. The vehicle window glass further includes a third display area defined at a position that does not overlap the shielding layer in plan view and is capable of irradiating light from the light source the third display area is included in a range of a solid angle of 50 degrees when viewing the center of the driving line of sight from the center of the glove box, the vehicle display system according to claim 1 or 2.

12. The luminance of the light reflected in the second display area is 30 cd / m ２ or more. The vehicle display system according to claim 1 or 2.

Images