EP4395992A1 - Verbundscheibe für ein head-up-display - Google Patents
Verbundscheibe für ein head-up-displayInfo
- Publication number
- EP4395992A1 EP4395992A1 EP22769962.6A EP22769962A EP4395992A1 EP 4395992 A1 EP4395992 A1 EP 4395992A1 EP 22769962 A EP22769962 A EP 22769962A EP 4395992 A1 EP4395992 A1 EP 4395992A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pane
- intermediate layer
- functional film
- thermoplastic intermediate
- laminated
- 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.)
- Pending
Links
Classifications
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- B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
- B32B17/1044—Invariable transmission
- B32B17/10458—Polarization selective transmission
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- 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
- B32B2605/00—Vehicles
- B32B2605/08—Cars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J1/00—Windows; Windscreens; Accessories therefor
- B60J1/02—Windows; Windscreens; Accessories therefor arranged at the vehicle front, e.g. structure of the glazing, mounting of the glazing
-
- 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
-
- 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
Definitions
- DE 10 2014 220 189 A1 discloses a HUD projection arrangement which is operated with p-polarized radiation in order to generate a HUD image. Since the angle of incidence is typically close to Brewster's angle and p-polarized radiation is therefore reflected only to a small extent by the glass surfaces, the windshield has a reflective structure that can reflect p-polarized radiation in the direction of the driver.
- WO 2019/046157 A1 discloses a HUD projection arrangement which is operated with p-polarized radiation in order to generate a HUD image, which has an outer pane, a wedge-shaped intermediate layer and an inner pane, with a p- polarized radiation reflecting coating is applied.
- CN 113071165 A discloses a HUD projection arrangement which is operated with p-polarized radiation in order to generate a HUD image which has an outer pane, a wedge-shaped intermediate layer and an inner pane, with p-polarized radiation on the interior-side surface of the outer pane reflective coating is applied and a reflection-enhancing coating is applied to the interior-side surface of the inner pane.
- the object of the present invention is to provide an improved laminated pane and an improved projection arrangement for a head-up display.
- a further object of the invention is to specify a production method.
- the functional film is a reflective film that can be used as a HUD film, as described above, it goes without saying that the p-polarized radiation that the functional film emits reflect is p-polarized radiation in the visible spectral range, i.e. in the range from 400 nm to 780 nm.
- the composite pane according to the invention also has a maximum wedge angle. It goes without saying that the maximum wedge angle of the composite pane according to the invention corresponds to the maximum wedge angle of the second thermoplastic intermediate layer.
- a substantially constant thickness of a disk or a layer is to be understood as meaning that the thickness of the disk or the layer is constant over the length and width within the scope of normal manufacturing tolerances. This preferably means that the thickness varies by no more than 5%, preferably by no more than 3%.
- the second thermoplastic intermediate layer has a maximum wedge angle ⁇ between 0.01 mrad and 0.19 mrad, particularly preferably between 0.12 mrad and 0.15 mrad, for example 0.12 mrad, 0.14 mrad or 0.15 mrad.
- the maximum wedge angle designates the largest wedge angle that occurs in the intermediate layer.
- the functional film can be a carrier film with a reflective coating or a metal-free reflective polymer film.
- the reflective coating is preferably applied to the interior surface, ie the surface facing the vehicle interior, and preferably comprises at least one layer based on a metal or a purely dielectric layer sequence with alternating refractive indices.
- the metal-based layer preferably contains or consists of silver and/or aluminum.
- the dielectric layer sequence preferably contains silicon nitride, silicon oxide and/or zinc oxide.
- the reflective polymer film preferably comprises or consists of dielectric polymer layers.
- the dielectric polymer layers preferably contain PET.
- the functional film in this composition is suitable for reflecting p-polarized radiation in the visible spectral range that strikes the layer.
- the functional film can be between 20 ⁇ m (microns) and 2 mm thick, preferably between 20 ⁇ m and 120 ⁇ m.
- the thickness of the functional film is essentially constant over the entire length, so the functional film has an essentially rectangular cross section.
- the functional film is therefore not a wedge film.
- the first thermoplastic intermediate layer and the second thermoplastic intermediate layer can, independently of one another, contain or consist of at least polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU) or mixtures or copolymers or derivatives thereof, preferably polyvinyl butyral (PVB).
- PVB polyvinyl butyral
- EVA ethylene vinyl acetate
- PU polyurethane
- PVB polyvinyl butyral
- the maximum wedge angles according to the invention of less than 0.20 mrad are significantly smaller than the wedge angles for conventional composite panes in the range of 0.5 mrad.
- Foils with only small wedge angles are cheaper and easier to manufacture than foils with larger wedge angles.
- Suitable processes for producing films with small wedge angles such as, for example, stretching processes or extrusion processes, are known to those skilled in the art.
- the functional film is arranged between the outer pane and the inner pane, as described above.
- the functional film is thus arranged inside the laminated pane and is protected in this way, for example, from damage such as scratches and also from fingerprints, particularly in the HUD area
- the functional film particularly preferably extends over the entire surface of the laminated pane minus a peripheral edge area of, for example, 20 mm. If the laminated pane has a sensor window, the functional film preferably has a recess in the area of the sensor window.
- the second thermoplastic intermediate layer can also be formed by more than one film.
- at least one of the foils must be designed with the wedge angle.
- the laminated pane has a sensor window and the outer pane and/or the inner pane has a covering print in a peripheral edge area and in an area surrounding the sensor window.
- the outer pane and the inner pane are preferably made of glass, in particular of soda-lime glass, which is common for window panes.
- the discs can but also from other types of glass (for example borosilicate glass, quartz glass, aluminosilicate glass) or transparent plastics (for example polymethyl methacrylate or polycarbonate).
- the thickness of the outer pane and the inner pane can vary widely and can thus be adapted to the requirements of the individual case.
- the outer pane and the inner pane preferably have thicknesses of 0.5 mm to 5 mm, particularly preferably 1 mm to 3 mm, very particularly preferably 1.6 mm to 2.1 mm.
- the outer pane has a thickness of 2.1 mm and the inner pane has a thickness of 1.2 mm or 1.6 mm.
- the outer pane or in particular the inner pane can also be thin glass with a thickness of, for example, 0.55 mm or 0.7 mm.
- the outer pane and the inner pane can be unprestressed, partially prestressed or prestressed independently of one another. If at least one of the panes is to have a prestress, this can be a thermal or chemical prestress.
- the outer pane and/or the inner pane can have anti-reflection coatings, non-stick coatings, anti-scratch coatings, photocatalytic coatings, electrically heatable coatings, sun protection coatings and/or low-E coatings.
- the height of the outer pane and the inner pane ie in the case of a windshield the distance between the roof edge of the composite pane and the motor edge of the composite pane, is preferably between 0.8 m and 1.40 m, particularly preferably between 0.9 m and 1.25 m
- the height of the first thermoplastic intermediate layer, the second thermoplastic intermediate layer and the functional film is preferably between 0.8 m and 1.40 m, particularly preferably between 0.9 m and 1.25 m.
- the composite pane according to the invention can be a vehicle pane.
- a vehicle window is provided for separating a vehicle interior from an external environment.
- a vehicle pane is therefore a window pane which is inserted into a window opening of the vehicle body or is intended for this purpose.
- a laminated pane according to the invention is in particular a windshield of a motor vehicle.
- the inner pane designates that pane which is intended to face the interior of the vehicle in the installed position.
- the outer pane designates that pane which is intended to face the outer surroundings of the vehicle in the installed position.
- the projector illuminates an area B of the windshield, where the radiation is reflected towards the viewer (driver), creating a virtual image which the viewer perceives from behind the windshield as seen from him.
- the area B of the windshield that can be irradiated by the projector is also referred to as the HUD area.
- the beam direction of the projector can typically be varied using mirrors, particularly vertically, in order to adapt the projection to the viewer's height.
- the area in which the viewer's eyes must be located for a given mirror position is referred to as the eyebox window.
- This eyebox window can be shifted vertically by adjusting the mirrors, with the entire area accessible in this way (that is to say the superimposition of all possible eyebox windows) being referred to as the eyebox.
- thermoplastic intermediate layer (a) an outer pane, a first thermoplastic intermediate layer, a functional film which is suitable for reflecting at least 5% of p-polarized radiation impinging on the functional film, a second thermoplastic intermediate layer, the thickness of which varies vertically at least in sections with a maximum wedge angle ⁇ less than 0.20 mrad, and an inner disk are provided;
- the laminated pane 100 shown in FIGS. 1 and 2 is, for example, a windshield of a passenger car.
- the outer pane 1 faces the outside environment
- the inner pane 5 faces the vehicle interior.
- the lower edge U of the laminated glass 100 is arranged downward toward the engine of the passenger car
- the upper edge O of the laminated glass 100 is arranged upward toward the roof
- the two side edges S are arranged laterally.
- An area B is also indicated in FIG. 1 , which corresponds to the HUD area of the laminated pane 100 .
- images are to be generated by a HUD projector. Due to the wedge-shaped design of the second thermoplastic intermediate layer 4, the two images that are generated by reflection of the projector image on the interior surface of the inner pane 5 and on the interior surface of the functional film 3 are superimposed. Disturbing ghost images therefore do not occur or occur only to a small extent.
- the outer pane 1, the inner pane 5, the first thermoplastic intermediate layer 2 and the second thermoplastic intermediate layer 4 have the same outer dimensions, so that the side edges, the upper edges and the lower edges of the outer pane 1, the inner pane 5, the first thermoplastic intermediate layer 2 and of the second thermoplastic intermediate layer 4 lie flush on top of one another when viewed through the laminated pane 100 .
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Joining Of Glass To Other Materials (AREA)
- Instrument Panels (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21194855 | 2021-09-03 | ||
| PCT/EP2022/074048 WO2023031176A1 (de) | 2021-09-03 | 2022-08-30 | Verbundscheibe für ein head-up-display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4395992A1 true EP4395992A1 (de) | 2024-07-10 |
Family
ID=77640483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22769962.6A Pending EP4395992A1 (de) | 2021-09-03 | 2022-08-30 | Verbundscheibe für ein head-up-display |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240253331A1 (de) |
| EP (1) | EP4395992A1 (de) |
| CN (1) | CN116075415A (de) |
| WO (1) | WO2023031176A1 (de) |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5882774A (en) | 1993-12-21 | 1999-03-16 | Minnesota Mining And Manufacturing Company | Optical film |
| JPH10148787A (ja) * | 1996-11-20 | 1998-06-02 | Central Glass Co Ltd | 表示装置 |
| FR2762541B1 (fr) * | 1997-04-24 | 1999-07-02 | Saint Gobain Vitrage | Procede de fabrication d'un vitrage feuillete |
| US6952312B2 (en) | 2002-12-31 | 2005-10-04 | 3M Innovative Properties Company | Head-up display with polarized light source and wide-angle p-polarization reflective polarizer |
| DE102014220189B4 (de) | 2014-10-06 | 2023-08-17 | Continental Automotive Technologies GmbH | Head-Up-Display und Verfahren zur Erzeugung eines virtuellen Bilds mittels eines Head-Up-Displays und Verwendung von p-polarisiertem Licht in einem Head-Up-Display |
| US10788667B2 (en) | 2017-08-31 | 2020-09-29 | Vitro Flat Glass Llc | Heads-up display and coating therefor |
| DE102018106617B4 (de) | 2018-03-21 | 2022-08-25 | Sartorius Lab Instruments Gmbh & Co. Kg | Kalibriergewicht und Kalibrieradapter |
| WO2020094419A1 (de) * | 2018-11-05 | 2020-05-14 | Saint-Gobain Glass France | Verbundscheibe für ein head-up-display |
| MA54136A (fr) * | 2018-11-09 | 2022-02-16 | Saint Gobain | Système de projection pour affichage tête haute (hud) à rayonnement polarisé p |
| CN114981707B (zh) * | 2020-01-15 | 2024-04-30 | Agc株式会社 | 抬头显示器系统 |
| DE202020107202U1 (de) * | 2020-12-14 | 2021-01-15 | Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg | Nachrüstbares Head-up-Display-system |
| US20240083144A1 (en) * | 2021-02-26 | 2024-03-14 | Saint-Gobain Glass France | Projection arrangement comprising a composite pane and p-polarized radiation |
| CN113031276B (zh) * | 2021-03-29 | 2022-05-10 | 福耀玻璃工业集团股份有限公司 | 一种抬头显示系统 |
| CN113071165B (zh) | 2021-04-16 | 2022-03-22 | 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 |
| WO2022228985A1 (de) * | 2021-04-29 | 2022-11-03 | Saint-Gobain Glass France | Verbundscheibe mit funktionsfolie und sammelleiter |
-
2022
- 2022-08-30 US US18/293,164 patent/US20240253331A1/en active Pending
- 2022-08-30 WO PCT/EP2022/074048 patent/WO2023031176A1/de not_active Ceased
- 2022-08-30 CN CN202280004389.XA patent/CN116075415A/zh active Pending
- 2022-08-30 EP EP22769962.6A patent/EP4395992A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN116075415A (zh) | 2023-05-05 |
| WO2023031176A1 (de) | 2023-03-09 |
| US20240253331A1 (en) | 2024-08-01 |
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