WO2024185844A1 - ウインドシールドガラスおよびヘッドアップディスプレイシステム - Google Patents

ウインドシールドガラスおよびヘッドアップディスプレイシステム Download PDF

Info

Publication number
WO2024185844A1
WO2024185844A1 PCT/JP2024/008725 JP2024008725W WO2024185844A1 WO 2024185844 A1 WO2024185844 A1 WO 2024185844A1 JP 2024008725 W JP2024008725 W JP 2024008725W WO 2024185844 A1 WO2024185844 A1 WO 2024185844A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
light
windshield glass
metal layer
glass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2024/008725
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
昭裕 安西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Corp
Original Assignee
Fujifilm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujifilm Corp filed Critical Fujifilm Corp
Priority to CN202480016922.3A priority Critical patent/CN120826379A/zh
Priority to JP2025505662A priority patent/JPWO2024185844A1/ja
Priority to EP24767210.8A priority patent/EP4678609A1/en
Publication of WO2024185844A1 publication Critical patent/WO2024185844A1/ja
Priority to US19/318,432 priority patent/US20260003186A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/77—Instrument locations other than the dashboard
    • B60K2360/785—Instrument locations other than the dashboard on or in relation to the windshield or windows
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B2027/0192—Supplementary details
    • G02B2027/0194—Supplementary details with combiner of laminated type, for optical or mechanical aspects

Definitions

  • the present invention relates to a windshield glass having a reflective layer and a head-up display system using this windshield glass.
  • a head-up display or a head-up display system that projects an image onto the windshield glass of a vehicle or the like to provide the driver with various information such as a map, driving speed, and vehicle status.
  • a virtual image including the above-mentioned various pieces of information is projected onto the windshield glass and is observed by the driver or the like.
  • the position of the virtual image is located outside the vehicle and forward of the windshield glass.
  • the position of the virtual image is usually 1000 mm or more forward of the windshield glass and closer to the outside world than the windshield glass. This allows the driver to obtain the above-mentioned various pieces of information while looking at the outside world ahead without having to move his or her line of sight significantly. For this reason, it is expected that the use of a head-up display system will enable drivers to obtain various information and drive more safely.
  • a head-up display system can be constructed, for example, by forming a reflective layer on the windshield glass using a half-mirror film.
  • various half-mirror films that can be used in head-up display systems have been proposed.
  • Patent Document 1 describes a head-up display system that has a reflective layer that combines a metal layer and a dielectric layer and can reflect a portion of the P-polarized light emitted as projection light.
  • the windshield glass that constitutes the head-up display system is required to have a high visible light transmittance, including the portion having a combiner such as a reflective layer for reflecting projected light.
  • a combiner such as a reflective layer for reflecting projected light.
  • the reflectance of the reflective layer for P-polarized light is weak, and therefore there is a problem with the visibility of the displayed image (projected video).
  • In-vehicle head-up display systems need to improve the visibility of the head-up display image while meeting or exceeding the legally required transmittance, and so a high reflectance is required.
  • the red display indicating an alert among the image contents is required to have a high reflectance in order to further improve visibility.
  • the objective of the present invention is to provide a windshield glass and a head-up display system that have high visible light transmittance and can improve the visibility of the displayed image.
  • the present invention by forming a suitable metal layer and dielectric layer in the reflective layer provided on the windshield glass, it is possible to obtain a high visible light transmittance and to significantly improve the visibility of the displayed image. Specifically, this is achieved by the following means.
  • B) The transmittance at an incident angle of 0° is 70% or more.
  • the refractive index of the metal layer is 0.1 or less.
  • D In the dielectric layer, a layer in contact with the metal layer is not a metal oxide.
  • a head-up display system comprising: the windshield glass according to any one of [1] to [7]; and a projector that irradiates projection light onto an inner glass plate side of the windshield glass.
  • the projector emits P-polarized projection light.
  • the present invention provides a windshield glass and a head-up display system that have high visible light transmittance and can increase the brightness, i.e., visibility, of the displayed image.
  • FIG. 1 is a schematic diagram showing an example of a windshield glass of the present invention.
  • FIG. 2 is a schematic diagram showing an example of a head-up display having the windshield glass of the present invention.
  • angles such as “an angle expressed by a specific numerical value,””parallel,””perpendicular,” and “orthogonal” include an error range generally accepted in the relevant technical field.
  • angle includes a generally acceptable margin of error in the relevant technical field, and “overall” and the like also include a generally acceptable margin of error in the relevant technical field.
  • the term "light” refers to visible light and natural light (non-polarized). Visible light is electromagnetic light with wavelengths visible to the human eye, and generally refers to light in the wavelength range of 380 to 780 nm. Invisible light is light with wavelengths less than 380 nm or more than 780 nm. In addition, although not limited thereto, among visible light, light in the wavelength region of 420 to 490 nm is blue (B) light, light in the wavelength region of 495 to 570 nm is green (G) light, and light in the wavelength region of 620 to 750 nm is red (R) light.
  • B blue
  • G green
  • R red
  • the "visible light transmittance” is the visible light transmittance for a light source A as defined in JIS (Japanese Industrial Standards) R 3106. That is, the transmittance is determined by measuring the transmittance at each wavelength in the range of 380 to 780 nm using a spectrophotometer with an A light source, and multiplying the transmittance at each wavelength by a weighting coefficient obtained from the wavelength distribution and wavelength interval of the CIE (Commission Internationale de Illumination) standard relative luminous efficiency for light adaptation to calculate a weighted average.
  • CIE Commission Internationale de Illumination
  • P polarization refers to polarized light that vibrates in a direction parallel to the plane of incidence of the light.
  • the plane of incidence is perpendicular to the reflecting surface (such as the surface of windshield glass) and includes the incident and reflected light rays.
  • the vibration plane of the electric field vector is parallel to the plane of incidence.
  • Projection image means an image that is not the surrounding scenery such as the front or the like, but is based on the projection of light from the projector used. A projection image is observed by an observer as a virtual image that appears beyond the reflective layer of the windshield glass.
  • "Screen image” means an image displayed on a projector's rendering device or an image rendered by a rendering device onto an intermediate image screen or the like. In contrast to a virtual image, an image is a real image.
  • the images and projected pictures may be monochrome images, multi-color images having two or more colors, or full-color images.
  • the windshield glass of the present invention comprises, in this order, an outer glass sheet, an interlayer film, an inner glass sheet, and a reflective layer.
  • the reflective layer comprises a metal layer and dielectric layers sandwiching the metal layer.
  • the reflective layer is provided on the surface of the inner glass sheet opposite to the outer glass sheet.
  • the windshield glass refers to general window glass and windshield glass of vehicles such as automobiles including passenger cars, trains, airplanes, ships, motorcycles, and playground equipment.
  • the windshield glass of the present invention is preferably used as a windshield or windshield glass located at the front in the traveling direction of a vehicle such as a car.
  • FIG. 1 conceptually shows an example of a windshield glass according to the present invention.
  • the windshield glass shown in FIG. 1 has a windshield glass body 10 and a reflective layer 6 .
  • the windshield glass body 10 has an outer glass plate 1, an inner glass plate 2, and an interlayer film 3 sandwiched between the outer glass plate 1 and the inner glass plate 2, like a normal windshield glass for a vehicle.
  • the reflective layer 6 includes the metal layer 5, and the dielectric layers 41 and 42.
  • the metal layer 5 is sandwiched between the dielectric layers 41 and 42.
  • the reflective layer 6 is provided on the surface of the inner glass sheet 2 opposite to the outer glass sheet 1. That is, in the windshield glass of the present invention, the reflective layer 6 is provided on the inner side of a vehicle such as an automobile.
  • the outer glass sheet 1 and the inner glass sheet 2 are often curved glass sheets.
  • the inner glass plate 2 is located on the inside of the vehicle and the outer glass plate 1 is located on the outside of the vehicle, the inner glass plate 2 is arranged with its convex side facing the outer glass plate 1, and the outer glass plate 1 is arranged with its concave side facing the inner glass plate 2.
  • a reflective layer 6 having a dielectric layer 41, a dielectric layer 42 and a metal layer 5 is arranged on the concave side of the inner glass plate 2.
  • the sizes of the dielectric layer 41, the dielectric layer 42, and the metal layer 5 are not limited, and may be appropriately set depending on the intended size of the reflective layer 6.
  • the dielectric layer when there is no need to distinguish between the dielectric layer 41 and the dielectric layer 42, both will be collectively referred to as the dielectric layer.
  • the metal layer 5 is easily oxidized. Therefore, in the present invention, it is preferable that the dielectric layer acts as a protective film for the metal layer 5.
  • the area of the dielectric layer 42, preferably the dielectric layers 41 and 42, on the side of the metal layer 5 opposite the windshield glass body 10 is made larger than the area of the metal layer 5.
  • the dielectric layer 42 cover the entire surface of the metal layer 5 beyond the end of the metal layer 5 as shown in FIG. 1.
  • the dielectric layer serves as a protective film for the metal layer 5.
  • the dielectric layer be formed as a protective film so as to cover the entire surface of the metal layer, since silver is easily oxidized.
  • all layers may cover the entire surface of the metal layer 5, or only the layers in contact with the metal layer 5 may be covered.
  • the dielectric layer is formed of a plurality of layers, it is preferable that at least the layer in contact with the metal layer 5 has oxygen barrier properties.
  • the layer having oxygen barrier properties preferably has an oxygen permeability of 0.1 cm 3 /(m 2 ⁇ day ⁇ atm) or less, and more preferably 0.01 cm 3 /(m 2 ⁇ day ⁇ atm) or less. With such a configuration, the dielectric layer can more effectively function as a protective layer for the metal layer 5 .
  • the oxygen permeability may be measured in accordance with the gas permeability test method based on JIS K 7126-2: 2006.
  • a measuring device an oxygen permeability measuring device OX-TRAN1_50 manufactured by MOCON Co., Ltd. may be used.
  • the measuring temperature may be 23°C and the humidity may be 50%.
  • the visible light transmittance of the windshield glass of the present invention is not limited, but is preferably high.
  • the visible light transmittance of the windshield glass is preferably 70% or more, more preferably more than 70%, further preferably 75% or more, and particularly preferably 80% or more.
  • the windshield glass of the present invention has a transmittance (visible light transmittance) of 70% or more at an incidence angle of 0°. Note that the incidence angle of 0° is the transmittance when light is incident from the normal direction of the windshield glass. If the transmittance at an incidence angle of 0° is less than 70%, it cannot be used for in-vehicle applications, and there are problems such as poor visibility and unsafety.
  • the transmittance at an incident angle of 0° is preferably high.
  • the transmittance at an incident angle of 0° is preferably more than 70%, more preferably 75% or more, and even more preferably 80% or more.
  • the visible light transmittance is measured at an incident angle of 0°. It is preferable that the above-mentioned visible light transmittance is satisfied at any position of the windshield glass, and particularly, it is preferable that the above-mentioned visible light transmittance is satisfied at the position where the reflective layer 6 is present.
  • the metal layer 5 constituting the reflective layer 6 has a refractive index of 0.1 or less, preferably 0.05 or less, and has a high visible light transmittance. Therefore, the windshield glass of the present invention can be configured to satisfy the above-mentioned visible light transmittance regardless of whether any of glasses generally used for windshield glass is used as the outer glass plate 1 and the inner glass plate 2.
  • the windshield glass of the present invention preferably reflects linearly polarized light.
  • a reflective layer is incorporated into the windshield glass to be used as a combiner in a head-up display system, it is preferable that the projected image light be P-polarized, i.e., linearly polarized, in order to suppress reflection on the windshield glass surface.
  • the windshield glass of the present invention has a P-polarized light reflectance of 26% or more at an incident angle of 65°.
  • the incidence angle is the angle between the normal to the incidence surface and the incident light (optical axis of the light).
  • the angle ⁇ between the normal to the windshield glass (reflective layer) and the incident light is the incidence angle.
  • the P-polarized light reflectance of the windshield glass at an incidence angle of 65° is less than 26%, the visibility of the displayed image of the head-up display system will be insufficient, and blue and red parts of the displayed image will be difficult to see during the day, among other inconveniences.
  • the P-polarized light reflectance at an incident angle of 65° is preferably 28% or more, and more preferably 30% or more.
  • the P-polarized light reflectance at an incident angle of 65° is basically preferably high, but is preferably 35% or less, particularly taking into consideration the visible light transmittance in the region where the reflective layer is disposed.
  • the P-polarized light reflectance at an incident angle of 65° may be measured according to the examples described later.
  • the windshield glass there is no limitation on the shape of the windshield glass, and it is determined appropriately depending on the object on which the windshield glass is to be placed.
  • the windshield glass may be, for example, flat or may be a three-dimensional shape having a curved surface such as a concave or convex surface.
  • the direction that is the top during normal use, and the side that is the viewing side such as the observer side, the driver side, and the inside of the vehicle can be specified.
  • the reflective layer only needs to be provided in the display area of the windshield glass where the displayed image is displayed (the area where the projected light is reflected).
  • the reflective layer may be provided on the entire surface of the windshield glass, or may be provided on a part of the surface of the windshield glass, but it is preferable that the reflective layer be provided on a part of the surface.
  • the reflective layer may be provided at any position on the windshield glass, but it is preferable to provide the reflective layer at a position where a virtual image is easily visible to an observer such as a driver when used as a head-up display system.
  • the position where the reflective layer is provided on the windshield glass may be determined based on the relationship between the position of the driver's seat in a vehicle equipped with the head-up display system and the position where a projector is installed.
  • the reflective layer has a dielectric layer and a metal layer, and is configured by sandwiching the metal layer between the dielectric layers.
  • the reflecting layer is preferably configured so that the transmittance of the windshield glass is increased when the reflectance at an incident angle of 0° is low. Also, it is preferably configured so that the visibility of the displayed image (projected image) is increased when the reflectance at an incident angle of 65° is high. Also, since the phase of the reflecting layer can be controlled by the refractive index and film thickness of the metal layer and the dielectric layer, it is preferable to configure the metal layer and the dielectric layer so that the P-polarized light reflection at an incident angle of 65° is large.
  • the windshield glass of the present invention has a reflective layer in which a metal layer is sandwiched between dielectric layers, thereby achieving a windshield glass with high visible light transmittance and high reflectance of P-polarized light.
  • the reflective layer may be provided on the surface of the inner glass sheet by directly depositing a dielectric layer, a metal layer, and a dielectric layer on the inner glass sheet by a vapor phase deposition method, as in the examples described later.
  • a reflective layer prepared separately may be attached to the inner glass sheet by a known attachment means such as OCA (Optical Clear Adhesive).
  • the metal layer forming the reflective layer is not limited. That is, the metal layer may be made of any metal material as long as it can reflect visible light. Specifically, examples of materials for forming the metal layer include silver, aluminum, copper, gold, and alloys containing one or more of these metals.
  • the lower the refractive index of the metal layer the higher the P-polarized light reflectance at an incident angle of 65° can be.
  • the refractive index of the metal layer at a wavelength of 550 nm is 0.1 or less.
  • the refractive index of the metal layer at a wavelength of 550 nm is preferably 0.05 or less, and more preferably 0.03 or less.
  • the refractive index is the refractive index at a wavelength of 550 nm.
  • the metal layer is preferably made of pure silver.
  • a silver alloy may be used when forming a film by sputtering or the like, but even in this case, it is preferable to make the refractive index as low as possible.
  • the thickness of the metal layer there is no limitation on the thickness of the metal layer, and the thickness may be appropriately set depending on the material from which it is formed so that the desired reflection and transmission characteristics can be obtained.
  • the metal layer constituting the reflective layer is preferably a semi-transparent film having a thickness of about 10 nm, and this semi-transparent film is preferably sandwiched between dielectric layers, particularly dielectric layers having a multi-layer structure, i.e., a dielectric multilayer film.
  • the thickness of the metal layer is preferably 3 to 20 nm. The thickness of the metal layer affects the absolute value of the reflectance, and if the metal layer is too thin, the reflectance is low.
  • the metal layer 3 nm or thicker a suitable reflectance of the projection light (image light) can be obtained, and the visibility of the displayed image by the head-up display system can be improved. Moreover, if the metal layer is too thick, light will not pass through the metal layer, and the effect of the dielectric layer (dielectric multilayer film) on the opposite side to the light incident side may not be obtained. In contrast, by making the thickness of the metal layer 20 nm or less, the effect of sandwiching the metal layer between the dielectric layers can be favorably obtained, and the reflectance of P-polarized light incident from an oblique direction can be improved.
  • the thickness of the metal layer is more preferably from 4 to 18 nm, and further preferably from 5 to 15 nm.
  • the reflective layer has a configuration in which the above-mentioned metal layer is sandwiched between dielectric layers.
  • the dielectric layer is not limited, and various layers made of known dielectrics can be used.
  • materials for forming the dielectric layer include ZnSnMgOx , ZnSnOx , ZnO, SnO2 , TiO2 , Si3N4 , SiO2 , MgF2 , and AlN.Of these , Si3N4 and AlN are preferred examples.
  • the metal layer is a metal, preferably silver, more preferably pure silver, the dielectric layer preferably functions as an oxygen barrier layer as described above.
  • the dielectric layer may be formed of a single layer, but is preferably formed of two or more layers using, for example, the above-mentioned materials.
  • the dielectric layer is a film containing oxygen, there is a possibility that the adjacent layer may be oxidized during film formation.
  • metal layers are easily oxidized. For example, when a metal oxide film is formed by sputtering, the metal layer is exposed to oxygen plasma and oxidized. When the metal layer is oxidized, the refractive index increases and the visible light transmittance decreases.
  • the layer adjacent to the metal layer is a layer that is not a metal oxide, that is, a non-metal oxide film such as a nitride film.
  • the metal includes silicon.
  • the windshield glass of the present invention having such a structure, prevents the metal layer from being unnecessarily oxidized, which would result in a decrease in the refractive index and a decrease in the visible light transmittance of the reflective layer, i.e., the windshield glass.
  • the dielectric layer may be an alternating layer of high refractive index layers and low refractive index layers having a thickness of 1 to 300 nm, as described below, and the phase can be controlled by adjusting the film thickness and the refractive index, and the transmittance and reflectance can be controlled.
  • the metal layer and the dielectric layer are configured so as to reduce the unpolarized reflectance at an incident angle of 0° with respect to the windshield glass, and to increase the P-polarized reflectance at an incident angle of 65°. The details will be explained below.
  • a display image (projected video) is displayed to a user by reflecting projection light (image light) emitted from a projector on a reflective layer such as a half mirror provided on the windshield glass.
  • the head-up display system is also referred to as "HUD.”
  • windshield glass particularly windshield glass for vehicles, is required to have a high visible light transmittance in order to ensure visibility outside the vehicle, whereas in the case of HUD, the reflective layer (combiner) is required to have a certain degree of reflectance of the projected light in order to improve the visibility of the displayed image.
  • the projection light from the projector is usually obliquely incident on the windshield glass (reflective layer).
  • this angle is preferably 45 to 70 degrees with respect to the normal line of the windshield glass, i.e., close to the Brewster angle.
  • the projection light emitted by the projector is P-polarized light rather than S-polarized light, which has a high reflectance.
  • the windshield glass (reflective layer) that constitutes the HUD has a high visible light transmittance for light incident from the front, i.e., light with an incident angle of 0°, and also has a high reflectance for P-polarized light, which originally has a lower reflectance than S-polarized light, for obliquely incident light.
  • the refractive index of the metal layer is expressed as a complex refractive index n-ik (k is the extinction coefficient) and includes an imaginary part.
  • n-ik the refractive index of the metal layer
  • the reflection is also a complex number, and the phase of the interface reflection between the dielectric layer and the metal layer is shifted from 0° and 180°.
  • aluminum and silver have an extremely low refractive index compared to typical dielectric layers, with n ⁇ 1.
  • each layer is as follows:
  • the metal layer is a semi-transparent film having a thickness of about 10 nm, and the metal layer is sandwiched between dielectric multilayer films.
  • the dielectric multilayer film on the light incident side is considered to be a substrate for the metal layer and is configured as an anti-reflection film at an incident angle of 65°.
  • the dielectric multilayer film on the side opposite to the light incident side is considered to be a substrate for the metal layer, and is configured as an enhanced reflection film at an incident angle of 65°. In this way, the reflectance of P-polarized light is higher than the reflectance of S-polarized light at an incident angle of 65°.
  • the lower the refractive index of the metal layer the more effective the anti-reflection effect can be, and therefore the transmittance can be increased. Since the transmittance of windshield glass for vehicles is legally regulated to be 70% or more, the reflectance can be increased efficiently within the transmittance regulation.
  • the anti-reflection film refers to a film having a property of reducing the S-polarized light reflection to 10% or less at an incident angle of 65° on a glass substrate (without backside reflection) coated with a 15 nm metal layer.
  • the anti-reflection film is preferably designed to have a thickness that shifts the phase between the incident light and the interference reflected light of the dielectric multilayer film at an incident angle of 65°, thereby weakening the interference light of S-polarized light.
  • the optical path length of the dielectric multilayer film (the sum of n ⁇ d of each layer) is set to about 100 nm ⁇ 20 nm, where n is the refractive index and d is the film thickness.
  • examples of suitable designs include a 40 nm SiN layer/10 nm SiO2 layer (total of n ⁇ d: 96 nm) and a 15 nm SiN layer/55 nm SiO2 layer (total of n ⁇ d: 112 nm).
  • examples of suitable designs include a 7 nm SiN layer/47 nm SiO2 layer/9 nm SiN layer (total of n ⁇ d 102 nm) and a 15 nm SiN layer/ 20 nm SiO2 layer/20 nm SiN layer (total of n ⁇ d 100 nm) configuration as in the examples described below.
  • a design that weakens the interference of antireflection films is similarly applied.
  • the enhanced reflection film refers to a film having a property of achieving a P-polarized light reflection of 20% or more at an incident angle of 65° for a glass substrate (without back surface reflection) coated with a 15 nm metal layer.
  • the thickness of the reflection-enhancing film is preferably designed so as to shift the phase of the incident light and the interference reflected light of the dielectric multilayer film at an incident angle of 65°, thereby enhancing the interference light of P-polarized light.
  • n is the refractive index
  • d is the film thickness
  • the sum of n ⁇ d is 420 nm.
  • the reflectance of P-polarized light may be made higher than that of S-polarized light by controlling the magnetic field. For example, by actively changing the magnetic field (the ik part of the complex refractive index) by making a coil out of silver, the oscillation direction of the electrons when they enter the interface can be adjusted, creating a state in which the reflectance of S-polarized light is reduced and the reflectance of P-polarized light is increased toward the Brewster angle.
  • the magnetic field the ik part of the complex refractive index
  • the reflective layer i.e., the metal layer and the dielectric layers sandwiching the metal layer, are designed based on this technical concept, resulting in a HUD with high visible light transmittance and high reflectance for obliquely incident P-polarized light, resulting in high brightness of the displayed image, i.e. high visibility.
  • the dielectric layers sandwiching the metal layer may be composed of one layer.
  • the dielectric layers are preferably composed of multiple layers, for example, a three-layer structure such as Si3N4 / SiO2 / Si3N4 . That is, as described above, in the windshield glass of the present invention, the dielectric layers forming the reflective layer are preferably dielectric multilayer films.
  • the layer adjacent to the metal layer is a layer that does not contain oxygen, as described above.
  • the dielectric layer may be a two-layer structure, the above-mentioned three-layer structure, or a structure of four or more layers. According to the study by the present inventors, the dielectric layer is preferably a structure of 5 to 10 layers.
  • the dielectric layer on the light incident side i.e., the dielectric layer 42 on the opposite side of the metal layer 5 from the inner glass plate 2 in FIG. 1
  • the dielectric layer on the side opposite to the light incident side i.e., the dielectric layer 41 on the inner glass plate 2 side of the metal layer 5 in FIG.
  • the dielectric layer is a laminate of a high refractive index layer and a low refractive index layer and acts as a reflection-enhancing film for the metal layer as described above.
  • the dielectric layer is a laminate of a high refractive index layer and a low refractive index layer
  • the thickness of the high refractive index layer is thicker than that of the low refractive index layer, both in the dielectric layer on the light incident side and in the dielectric layer on the opposite side to the light incident side.
  • the high refractive index layer is a layer having a refractive index of 1.8 or more
  • the low refractive index layer is a layer having a refractive index of 1.5 or less.
  • the number of dielectric layers on the light incident side may be the same as or different from the number of dielectric layers on the opposite side to the light incident side.
  • the material forming the dielectric layer on the light incident side and the material forming the dielectric layer on the opposite side to the light incident side may be the same or different.
  • the dielectric layer on the light incident side and the dielectric layer on the opposite side to the light incident side are formed from the same material, in terms of being able to improve the P-polarized reflectance at an incident angle of 65°, being efficient because continuous film formation can be performed in the same film formation apparatus, and being less susceptible to adverse effects such as the inclusion of other materials.
  • the dielectric layer on the light incident side and the dielectric layer on the opposite side to the light incident side have the same number of layers and are made of the same material, and that the layer structure is symmetrical with respect to the metal layer.
  • the dielectric layers are often provided with alternating high refractive index layers and low refractive index layers, the above layer order is preferable in that it is easier to control interference efficiently and that the P-polarized light reflectance at an incident angle of 65° can be improved even with a small number of layers.
  • the thickness of the dielectric layer on the light incident side may be the same as or different from the thickness of the dielectric layer on the opposite side to the light incident side.
  • the thickness of the dielectric layer on the side opposite to the light incident side is thicker than the thickness of the dielectric layer on the light incident side, particularly when the dielectric layer has a multi-layer structure, it is preferable that the thickness of the dielectric layer on the side opposite to the light incident side is thicker than the thickness of the dielectric layer on the light incident side.
  • the dielectric layer on the light incident side and the dielectric layer on the opposite side to the light incident side have the same number of layers and are made of the same materials
  • the layer structure is symmetrical with the metal layers at the center
  • the film thickness of all layers is such that, for each corresponding layer, the dielectric layer on the opposite side to the light incident side has a thickness equal to or greater than that of the dielectric layer on the light incident side, and further, it is preferable that the thickness of the dielectric layer on the opposite side to the light incident side is thicker than the thickness of the dielectric layer on the light incident side.
  • This configuration is preferable in that it can improve the P-polarized light reflectance at an incident angle of 65° and can make the color of the appearance achromatic (neutral).
  • the optical path length of the dielectric layer (dielectric multilayer film), and it may be set appropriately depending on the material forming the dielectric layer, etc. Specifically, where n is the refractive index and d is the film thickness, the optical path length of the dielectric layers (the sum of n ⁇ d of each layer) is preferably 80 to 120 nm, more preferably 90 ⁇ 110 nm, for the dielectric layer on the light incident side.
  • the optical path length of the dielectric layer (the sum of n ⁇ d of each layer) of the dielectric layer on the opposite side to the light incident side is preferably 70 to 130 nm, 170 to 230 nm, 270 to 330 nm, or 370 to 430 nm, and more preferably 80 to 120 nm, 180 to 220 nm, 280 to 320 nm, or 380 to 420 nm.
  • the windshield glass of the present invention has an outer glass sheet and an inner glass sheet, that is, the windshield glass of the present invention is a laminated glass.
  • a reflective layer is provided on the surface of the inner glass sheet opposite to the outer glass sheet.
  • glass plates such as the inner glass plate and the outer glass plate
  • glass plates generally used for windshield glass can be used.
  • glass plates having a visible light transmittance of 80% or less, such as 73% or 76%, such as green glass with high heat insulation properties may be used.
  • the windshield glass of the present invention has the above-mentioned reflective layer, so that a windshield glass having a visible light transmittance of 70% or more can be obtained even at the position of the reflective layer.
  • the inner glass sheet and the outer glass sheet may be made of the same or different materials.
  • glass sheets when there is no need to distinguish between the inner glass sheet and the outer glass sheet, they will be collectively referred to simply as "glass sheets.”
  • the thickness of the glass plate is not particularly limited, but is about 0.5 to 5.0 mm, preferably 1.0 to 3.0 mm, and more preferably 2.0 to 2.3 mm.
  • the thickness of the outer and inner glass sheets may be the same or different.
  • a windshield glass having a laminated glass structure can be produced by using a known method for producing laminated glass.
  • the laminated glass can be produced by sandwiching an interlayer film for laminated glass between two glass sheets, repeatedly subjecting the interlayer film to heat treatment and pressure treatment (e.g., treatment using a rubber roller) several times, and finally subjecting the interlayer film to heat treatment under pressure using an autoclave or the like.
  • an interlayer is disposed between the outer glass sheet and the inner glass sheet.
  • the interlayer film prevents glass from penetrating into the vehicle interior and scattering in the event of an accident.
  • interlayer film sheet any known interlayer film used as an interlayer film (interlayer) in laminated glass can be used.
  • the interlayer film may be, for example, a resin film containing a resin selected from the group consisting of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer, and chlorine-containing resin.
  • PVB polyvinyl butyral
  • ethylene-vinyl acetate copolymer ethylene-vinyl acetate copolymer
  • chlorine-containing resin preferably the main component of the interlayer film.
  • the main component refers to a component that occupies 50% by mass or more of the interlayer film.
  • polyvinyl butyral and ethylene-vinyl acetate copolymer are preferred for the intermediate film, and polyvinyl butyral is more preferred.
  • the resin is preferably a synthetic resin.
  • Polyvinyl butyral can be obtained by acetalizing polyvinyl alcohol with butyraldehyde.
  • the preferred lower limit of the degree of acetalization of the polyvinyl butyral is 40%, the preferred upper limit is 85%, the more preferred lower limit is 60%, and the more preferred upper limit is 75%.
  • Polyvinyl alcohol is usually obtained by saponifying polyvinyl acetate, and polyvinyl alcohol having a saponification degree of 80 to 99.8 mol % is generally used.
  • the preferable lower limit of the degree of polymerization of the polyvinyl alcohol is 200, and the preferable upper limit is 3000.
  • the more preferable lower limit is 500, and the more preferable upper limit is 2000.
  • the thickness of the interlayer there is no restriction on the thickness of the interlayer, and the thickness that can achieve the desired performance depending on the forming material, etc., can be set in the same way as the interlayer of known windshield glass.
  • the HUD of the present invention includes the above-mentioned windshield glass of the present invention and a projector that irradiates projection light (image light) onto the inner glass plate side of the windshield glass.
  • a head-up display system includes the above-mentioned windshield glass of the present invention and a projector that irradiates projection light (image light) onto the inner glass plate side of the windshield glass.
  • FIG. 2 conceptually illustrates an example of a HUD according to the present invention.
  • 2 includes the windshield glass of the present invention having the windshield glass body 10 and the reflective layer 6, and a projector 7.
  • the reflective layer 6 includes, as described above, the dielectric layer 42 on the light incident side, the dielectric layer 41 on the side opposite to the light incident side, and the metal layer 5 sandwiched between them.
  • the HUD 20 is used in a vehicle such as a passenger car.
  • the projection light emitted by the projector there is no limitation on the projection light emitted by the projector, and projection light used in known HUDs can be used. Therefore, the projection light emitted by the projector may be monochromatic light such as red light, green light, and blue light, or may be bichromatic light such as red light and blue light, or may be projection light corresponding to a full-color image including red light, green light, and blue light, so long as it is visible light.
  • the projection light emitted by the projector may be polarized or unpolarized, but polarized light is preferable, and P-polarized light is more preferable.
  • the projector 7 preferably irradiates the windshield glass with P-polarized projection light.
  • the projector 7 By projecting the light that the projector 7 irradiates onto the windshield glass as P-polarized light, the reflection of the projected light by the outer glass plate 1 and the inner glass plate 2 of the windshield glass can be significantly reduced, thereby suppressing inconveniences such as the observation of double images.
  • the projector 7 irradiates the windshield with P-polarized projection light at the Brewster angle, thereby eliminating reflection of the projection light on the outer glass plate 1 and the inner glass plate 2, and enabling a clearer image to be displayed.
  • a "projector” is a “device that projects light or an image” and includes a “device that projects a drawn image” and emits projection light that carries an image to be displayed.
  • the projector 7 emits P-polarized projection light.
  • the projector 7 is disposed so that the P-polarized projection light carrying the image to be displayed can be incident on the reflective layer 6 of the windshield glass at an oblique angle of incidence.
  • the projector 7 preferably includes a drawing device and reflects and displays an image (real image) drawn on a small intermediate image screen as a virtual image via a combiner.
  • the projector may be a known projector used in a HUD. It is preferable that the projector is one in which the imaging distance of the virtual image, i.e., the imaging position of the virtual image, is variable.
  • Methods for changing the imaging distance of a virtual image in a projector include, for example, moving the image generation surface (screen) (see JP 2017-21302 A), switching between multiple optical paths with different optical path lengths (see WO 2015/190157 A), changing the optical path length by inserting and/or moving a mirror, changing the focal length by using a lens assembly as an imaging lens, moving the projector, switching between multiple projectors with different virtual image imaging distances, and using a variable focus lens (see WO 2010/116912 A).
  • the projector may be one in which the imaging distance of the virtual image can be changed continuously, or one in which the imaging distance of the virtual image can be switched at two or more points.
  • the distance of the driver's line of sight can be appropriately handled even when the driver is driving at a normal speed on an ordinary road and when the driver is driving at a high speed on an expressway.
  • the drawing device may be a device that itself displays an image, or it may be a light-emitting device that can draw an image.
  • the drawing device refers to a device that includes a light source, and further includes a light modulator, a laser brightness modulation means and a pulse modulation means according to the drawing method, and an optical deflection means for drawing that is provided as necessary.
  • the light from the light source is modulated according to the display image by an optical modulator, a laser brightness modulation means, a pulse modulation means, etc., and, if necessary, scanned by an optical deflection means for drawing, and adjusted by a known drawing method.
  • LEDs Light Emitting Diodes
  • OLEDs organic light emitting diodes
  • discharge tubes and laser light sources
  • LEDs and discharge tubes are preferred because they are suitable as light sources for drawing devices that emit linearly polarized light
  • LEDs are particularly preferred because LEDs have emission wavelengths that are not continuous in the visible light range and are therefore suitable for combination with combiners that use cholesteric liquid crystal layers that exhibit selective reflection in specific wavelength ranges, as described below.
  • the light source may be a self-luminous image display device such as an organic electroluminescence (EL) display (OLED display), etc. In this case, the light source itself serves as a drawing device.
  • EL organic electroluminescence
  • the drawing method can be selected according to the light source to be used, and is not particularly limited.
  • Examples of the drawing method include a fluorescent display tube, an LCD (Liquid Crystal Display) method using liquid crystal, an LCOS (Liquid Crystal on Silicon) method, a DLP (Digital Light Processing) method, and a scanning method using a laser.
  • the drawing method may be a method using a fluorescent display tube integrated with a light source.
  • the LCD method is preferable as the drawing method.
  • each liquid crystal cell of a liquid crystal display element is arranged two-dimensionally, and is modulated (on/off) according to the image to be displayed, so that an image corresponding to the image to be displayed is displayed on the liquid crystal display element by light emitted from a light source.
  • the image displayed by the liquid crystal display element is projected as projection light through a projection lens.
  • the DLP method is a display system that uses a DMD (Digital Micromirror Device).
  • the DMD changes the angle of two-dimensionally arranged micromirrors according to the image to be displayed to turn on/off the reflection of light, and draws an image by modulating and reflecting light emitted from a light source according to the image to be displayed.
  • the light reflected by the DMD is irradiated as projection light via a projection lens.
  • the scanning method is a method in which a light beam such as a laser beam emitted from a light source is modulated and deflected according to a display image, so that the light beam is scanned two-dimensionally on a screen and contrast is created using an afterimage of the eye.
  • a light beam such as a laser beam emitted from a light source
  • a display image so that the light beam is scanned two-dimensionally on a screen and contrast is created using an afterimage of the eye.
  • red, green and blue laser light that has been luminance modulated or pulse modulated is combined into a single light beam by a combining optical system or a focusing lens, and the light beam is scanned two-dimensionally by an optical deflection means to be imaged on an intermediate image screen described later.
  • the luminance modulation and pulse modulation of the laser light of each color of red light, green light, and blue light may be performed directly by modulating the light source, or may be performed by an external modulator.
  • the light deflection means include a galvanometer mirror, a combination of a galvanometer mirror and a polygon mirror, and MEMS (Micro Electro Mechanical Systems), among which MEMS is preferred.
  • the scanning method examples include a random scan method and a raster scan method, with the raster scan method being preferred.
  • the laser light can be driven, for example, with a resonant frequency in the horizontal direction and a sawtooth wave in the vertical direction.
  • the scanning method does not require a projection lens, so it is easy to miniaturize the device.
  • the light emitted from the imaging device may be linearly polarized or natural (unpolarized) light.
  • the irradiated light is essentially linearly polarized.
  • the polarization direction (transmission axis direction) of the light of the multiple wavelengths is the same. It is known that some commercially available drawing devices have non-uniform polarization directions in the wavelength ranges of red, green, and blue light of the emitted light (see JP 2000-221449 A).
  • the projection light emitted by the projector is preferably P-polarized light.
  • the imaging device may use an intermediate image screen.
  • An "intermediate image screen” is a screen on which an image is imaged, i.e., the imaging device forms a visible image on the intermediate image screen using light emitted by the imaging device, e.g. when the light is not yet visible as an image.
  • the image drawn on the intermediate image screen may be projected onto the combiner by light passing through the intermediate image screen, or may be projected onto the combiner by reflection from the intermediate image screen.
  • intermediate image screens include scattering films, microlens arrays, and screens for rear projection.
  • a plastic material is used as the intermediate image screen
  • the intermediate image screen if the intermediate image screen has birefringence, the polarization plane and light intensity of the polarized light incident on the intermediate image screen will be disturbed, making it easier for color unevenness and the like to occur in the combiner (reflective layer).
  • the problem of color unevenness can be reduced by using a phase difference film having a predetermined phase difference.
  • the intermediate image screen is preferably one that has a function of expanding and transmitting incident light rays. This is because it allows for the enlarged display of the projected image.
  • An example of such an intermediate image screen is a screen that is configured with a microlens array.
  • Microarray lenses used in HUDs are described in, for example, Japanese Patent Application Laid-Open No. 2012-226303, Japanese Patent Application Laid-Open No. 2010-145745, and Japanese Patent Publication No. 2007-523369.
  • the projector may include a reflector or the like that adjusts the optical path of the projected light formed by the drawing device.
  • the windshield glass of the present invention is particularly useful for HUDs used in combination with projectors using lasers, LEDs, OLEDs, and the like as light sources whose emission wavelengths are not continuous in the visible light region, because the reflective layers, i.e., the metal layer and the dielectric layer, can be adjusted to suit each emission wavelength. It can also be used for projection of a display such as an LCD (liquid crystal display) that uses polarized display light.
  • LCD liquid crystal display
  • the projection light emitted by the projector is incident on the reflective layer 6 of the windshield glass at a predetermined incident angle ⁇ , is reflected, and is observed as a display image (projected video) by the driver E.
  • the driver observes a virtual image of the projected video projected onto the windshield glass.
  • the projection light emitted by the projector is preferably incident at an oblique incidence angle of 45° to 70° with respect to the normal to the windshield glass (reflective layer) shown by the dashed line in the figure.
  • the projection light emitted by the projector is preferably incident on the windshield glass at an incidence angle ⁇ of 45° to 70°.
  • the Brewster angle of the interface between glass, which has a refractive index of about 1.51, and air, which has a refractive index of 1, is approximately 56°. Therefore, by making P-polarized light incident within the above-mentioned range of incident angle ⁇ , it is possible to display an image with little reflected light from the surface of the inner glass plate and little effect of double images. It is also preferable that the incident angle ⁇ is 50° to 65°. In this case, it is sufficient that the driver E can observe the projected image at an angle of 45° to 70°, preferably 50° to 65°, on the side opposite to the incident light, relative to the normal line of the windshield glass shown by the dashed line, on the incident side of the projection light.
  • the incident light may be incident from any direction, such as above, below, left, right, etc., on the windshield glass, and may be determined according to the viewing direction. For example, it is preferable that the incident light is incident from below at an oblique incident angle as described above when in use.
  • the windshield glass (reflective layer) is preferably disposed so as to reflect incident P-polarized light.
  • the projection light incident on the windshield glass is preferably P-polarized light that vibrates in a direction parallel to the plane of incidence.
  • the light emitted by the projector is not linearly polarized, it may be converted to P-polarized light by providing a linear polarizing film (polarizer) on the side of the light emitted by the projector, or it may be converted to P-polarized light by a known method using a linear polarizing film or the like in the optical path from the projector to the windshield glass.
  • the member that converts the projection light that is not linearly polarized to P-polarized light is also considered to constitute the projector in the HUD of the present invention.
  • the polarization direction of the emitted light is not uniform in the wavelength ranges of red, green, and blue light
  • the HUD may be a projection system that allows the virtual image formation position to be changed. By allowing the virtual image formation position to be changed, the driver can visually recognize the virtual image more comfortably and conveniently.
  • the virtual image formation position is a position where the virtual image can be viewed by the driver of the vehicle, and is typically a position beyond the windshield glass, 1000 mm or more away from the driver, for example.
  • the present invention is basically configured as described above.
  • the windshield glass and head-up display system (HUD) of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiment, and various improvements and modifications may of course be made without departing from the spirit of the present invention.
  • a windshield glass on which a reflective layer was formed was prepared as follows. (Formation of reflective layer) The reflective layer consisting of a dielectric layer and a metal layer was formed by magnetron sputtering on a 2 mm thick float glass (manufactured by Central Glass Co., Ltd., FL2, visible light transmittance 90%) that was used as the inner glass plate. The dielectric layer and the metal layer (silver layer (Ag layer)) were formed on the inner glass plate as shown in Table 1.
  • the reflective layers correspond to the windshield glasses of Examples 1, 2, and 3, from the top, and the bottom corresponds to the windshield glass of Comparative Example 1.
  • the refractive index of the silver layer was estimated by fitting with an ellipsometer.
  • the layer adjacent to the silver layer i.e., the metal layer, was a nitride layer ( Si3N4 layer), so that the oxygen barrier performance was high and the silver layer was not oxidized, resulting in a low refractive index.
  • the barrier performance was somewhat degraded because the nitride layer adjacent to the silver layer was thin, and the silver layer was slightly oxidized, resulting in a somewhat high refractive index.
  • the layer adjacent to the silver layer was an oxide layer, and the refractive index increased due to the silver layer being exposed to oxygen plasma during sputtering.
  • the silver layer had the same area as the adjacent layer, so oxygen easily penetrated from the edge of the silver layer, which was also one of the factors that increased the refractive index.
  • the oxygen barrier (oxygen permeability) of the film adjacent to the silver layer is a value obtained by forming the film adjacent to the silver layer on a plastic substrate and measuring the oxygen barrier performance as described above.
  • the intermediate film was sandwiched between the inner glass plate and the outer glass plate to prepare a laminate.
  • the outer glass plate was a float glass having a thickness of 2 mm (FL2, manufactured by Central Glass Co., Ltd., visible light transmittance 90%), and the intermediate film was a PVB film having a thickness of 0.76 mm (manufactured by Sekisui Chemical Co., Ltd.).
  • the reflectance of the projected image was calculated by multiplying the reflectance by a coefficient corresponding to the visual sensitivity and the emission spectrum of the D65 light source at wavelengths of 380 to 780 nm in 10 nm increments. The results are shown in the table below.
  • the outer glass sheet and the inner glass sheet were changed from float glass to green glass, and the transmittance and brightness were evaluated according to the following criteria.
  • the HUD display image was observed with a road in the daytime with the windshield installed as the background.
  • the HUD display image displayed characters in white, green, and red.
  • D I could read the white and green letters, but I could't read the red letters. The results are shown in the table below.
  • HUDs in-vehicle head-up display systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
PCT/JP2024/008725 2023-03-08 2024-03-07 ウインドシールドガラスおよびヘッドアップディスプレイシステム Ceased WO2024185844A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202480016922.3A CN120826379A (zh) 2023-03-08 2024-03-07 挡风玻璃及平视显示系统
JP2025505662A JPWO2024185844A1 (https=) 2023-03-08 2024-03-07
EP24767210.8A EP4678609A1 (en) 2023-03-08 2024-03-07 Windshield glass and head-up display system
US19/318,432 US20260003186A1 (en) 2023-03-08 2025-09-04 Windshield glass and head-up display system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-035669 2023-03-08
JP2023035669 2023-03-08

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US19/318,432 Continuation US20260003186A1 (en) 2023-03-08 2025-09-04 Windshield glass and head-up display system

Publications (1)

Publication Number Publication Date
WO2024185844A1 true WO2024185844A1 (ja) 2024-09-12

Family

ID=92675262

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/008725 Ceased WO2024185844A1 (ja) 2023-03-08 2024-03-07 ウインドシールドガラスおよびヘッドアップディスプレイシステム

Country Status (5)

Country Link
US (1) US20260003186A1 (https=)
EP (1) EP4678609A1 (https=)
JP (1) JPWO2024185844A1 (https=)
CN (1) CN120826379A (https=)
WO (1) WO2024185844A1 (https=)

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07270711A (ja) 1994-03-30 1995-10-20 Canon Inc 情報表示装置
JP2000221449A (ja) 1999-01-29 2000-08-11 Arisawa Mfg Co Ltd 映像装置
JP2007523369A (ja) 2004-02-04 2007-08-16 マイクロビジョン，インク． 走査ビームヘッドアップ表示装置および関連システム、および方法
JP2010145745A (ja) 2008-12-18 2010-07-01 Equos Research Co Ltd 画像形成装置、及び、ヘッドアップディスプレイ装置
WO2010116912A1 (ja) 2009-04-08 2010-10-14 国立大学法人東京大学 トラッキング装置およびこのトラッキング装置を備えたトラッキング顕微鏡並びにトラッキング方法
JP2012226303A (ja) 2011-12-21 2012-11-15 Pioneer Electronic Corp 光源ユニット及びヘッドアップディスプレイ
WO2013122012A1 (ja) * 2012-02-14 2013-08-22 富士フイルム株式会社 ミラーフィルム、その製造方法、及びそれを用いた反射鏡
JP2013228674A (ja) 2012-03-28 2013-11-07 Nippon Seiki Co Ltd 車両用表示装置
WO2015190157A1 (ja) 2014-06-13 2015-12-17 三菱電機株式会社 虚像表示装置
WO2016058474A2 (zh) 2014-10-14 2016-04-21 福耀玻璃工业集团股份有限公司 一种抬头显示系统
JP2017021302A (ja) 2015-07-15 2017-01-26 日本精機株式会社 ヘッドアップディスプレイ
US20220179208A1 (en) * 2019-07-05 2022-06-09 Saint-Gobain Glass France Projection assembly for a head-up display (hud) with p-polarised radiation
WO2022205916A1 (zh) * 2021-03-29 2022-10-06 福耀玻璃工业集团股份有限公司 一种抬头显示系统
WO2022207004A1 (zh) * 2021-04-16 2022-10-06 福耀玻璃工业集团股份有限公司 抬头显示玻璃和抬头显示系统

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07270711A (ja) 1994-03-30 1995-10-20 Canon Inc 情報表示装置
JP2000221449A (ja) 1999-01-29 2000-08-11 Arisawa Mfg Co Ltd 映像装置
JP2007523369A (ja) 2004-02-04 2007-08-16 マイクロビジョン，インク． 走査ビームヘッドアップ表示装置および関連システム、および方法
JP2010145745A (ja) 2008-12-18 2010-07-01 Equos Research Co Ltd 画像形成装置、及び、ヘッドアップディスプレイ装置
WO2010116912A1 (ja) 2009-04-08 2010-10-14 国立大学法人東京大学 トラッキング装置およびこのトラッキング装置を備えたトラッキング顕微鏡並びにトラッキング方法
JP2012226303A (ja) 2011-12-21 2012-11-15 Pioneer Electronic Corp 光源ユニット及びヘッドアップディスプレイ
WO2013122012A1 (ja) * 2012-02-14 2013-08-22 富士フイルム株式会社 ミラーフィルム、その製造方法、及びそれを用いた反射鏡
JP2013228674A (ja) 2012-03-28 2013-11-07 Nippon Seiki Co Ltd 車両用表示装置
WO2015190157A1 (ja) 2014-06-13 2015-12-17 三菱電機株式会社 虚像表示装置
WO2016058474A2 (zh) 2014-10-14 2016-04-21 福耀玻璃工业集团股份有限公司 一种抬头显示系统
JP2017021302A (ja) 2015-07-15 2017-01-26 日本精機株式会社 ヘッドアップディスプレイ
US20220179208A1 (en) * 2019-07-05 2022-06-09 Saint-Gobain Glass France Projection assembly for a head-up display (hud) with p-polarised radiation
WO2022205916A1 (zh) * 2021-03-29 2022-10-06 福耀玻璃工业集团股份有限公司 一种抬头显示系统
WO2022207004A1 (zh) * 2021-04-16 2022-10-06 福耀玻璃工业集团股份有限公司 抬头显示玻璃和抬头显示系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4678609A1

Also Published As

Publication number Publication date
US20260003186A1 (en) 2026-01-01
JPWO2024185844A1 (https=) 2024-09-12
CN120826379A (zh) 2025-10-21
EP4678609A1 (en) 2026-01-14

Similar Documents

Publication Publication Date Title
KR102788652B1 (ko) 헤드업 디스플레이 시스템
KR102804050B1 (ko) 헤드업 디스플레이 시스템
CN109219767B (zh) 平视显示器装置以及冷光镜
CN109416471B (zh) 平视显示装置
JP2022113721A (ja) 情報表示装置
CN106990530B (zh) 平视显示器装置的冷光镜以及平视显示器装置
KR20050110614A (ko) 광각 ｐ-편광 반사식 편광기 및 편광된 광원을 구비한헤드-업 디스플레이
JP7465950B2 (ja) 直線偏光反射フィルム、ウインドシールドガラスおよびヘッドアップディスプレイシステム
JP2006039029A (ja) 表示装置
JP2009128658A (ja) ヘッドアップディスプレイ用光学フィルム、ヘッドアップディスプレイ及び移動体
JP2021534457A (ja) サイドペインを備える乗物用投影アセンブリ
WO2015177833A1 (ja) 虚像生成素子及びヘッドアップディスプレイ
KR20220115930A (ko) Hud 시스템의 화질 개선 방법, 편광 소자, 및 편광 소자 등을 포함하는 hud 시스템
CN120513407A (zh) 具有p偏振成像单元的用于载具的显示系统
CN218213623U (zh) 显示装置、抬头显示器以及交通设备
WO2024185844A1 (ja) ウインドシールドガラスおよびヘッドアップディスプレイシステム
JP2020118762A (ja) 虚像表示装置
JP3785461B2 (ja) ヘッドアップディスプレイ方式
JP2022090496A (ja) 虚像表示装置、およびコールドミラー
CN220773286U (zh) 反射件、抬头显示系统和交通工具
CN220509161U (zh) 透反膜、抬头显示系统及交通工具
CN220961998U (zh) 抬头显示系统及交通工具
CN221351860U (zh) 反射件、抬头显示系统和交通工具
WO2025100231A1 (ja) ウインドシールドガラスおよびヘッドアップディスプレイシステム
CN119556386A (zh) 反射件、抬头显示系统和交通工具

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24767210

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2025505662

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2025505662

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 202480016922.3

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2024767210

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

WWP Wipo information: published in national office

Ref document number: 202480016922.3

Country of ref document: CN

ENP Entry into the national phase

Ref document number: 2024767210

Country of ref document: EP

Effective date: 20251008

ENP Entry into the national phase

Ref document number: 2024767210

Country of ref document: EP

Effective date: 20251008

ENP Entry into the national phase

Ref document number: 2024767210

Country of ref document: EP

Effective date: 20251008

ENP Entry into the national phase

Ref document number: 2024767210

Country of ref document: EP

Effective date: 20251008