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KR-102960811-B1 - Laminated glass for partially heatable projection devices

KR102960811B1KR 102960811 B1KR102960811 B1KR 102960811B1KR-102960811-B1

Abstract

The present invention relates to a laminated glass plate (1) for a projection device (100), wherein the laminated glass plate is at least: - outer glass plate (2), inner glass plate (3), and a thermoplastic intermediate layer (4) arranged between the outer glass plate (2) and the inner glass plate (3), Here, the outer glass plate (2) and the inner glass plate (3) each have an outer surface (I, III) and an inner surface (II, IV), and the outer surface (III) of the outer glass plate (2) and the inner surface (II) and the inner glass plate (3) face each other, and The thermoplastic intermediate layer (4) comprises or is composed of at least one masking layer (5), and the masking layer (5) is opaque in at least one region (5'), and - A heating element (6) arranged within the opaque region (5') of the masking layer (5), and - Includes a reflective layer (11) suitable for reflecting visible light (12), Here, the reflective layer (11) is spatially arranged in front of the masking layer (5) in the direction of viewing from the inner glass plate (3) to the outer glass plate (2) and overlaps at least partially with the opaque area (5') of the masking layer (5).

Inventors

  • 고머, 안드레아스
  • 슐츠, 발렌틴
  • 보슈크, 베안트

Assignees

  • 쌩-고뱅 세쿠리트 프랑스

Dates

Publication Date
20260507
Application Date
20220426
Priority Date
20210512

Claims (16)

  1. Laminated glass plate (1) for a projection device (100) comprising at least the following: - outer glass plate (2), inner glass plate (3), and a thermoplastic intermediate layer (4) arranged between the outer glass plate (2) and the inner glass plate (3), Here, the outer glass plate (2) and the inner glass plate (3) each have an outer surface (I, III) and an inner surface (II, IV), and the outer surface (III) of the outer glass plate (2) and the inner surface (II) and the inner glass plate (3) face each other, and The thermoplastic intermediate layer (4) comprises or is composed of at least one masking layer (5), and the masking layer (5) is opaque in at least one region (5'), and - A heating element (6) arranged within the opaque region (5') of the masking layer (5), and - Includes a reflective layer (11) suitable for reflecting visible light (12), Here, the reflective layer (11) is spatially arranged in front of the masking layer (5) in the direction of viewing from the inner glass plate (3) to the outer glass plate (2) and overlaps at least partially with the opaque area (5') of the masking layer (5).
  2. In claim 1, the masking layer (5) also has a transparent area (5"), and the opaque area (5') extends less than 30%, or less than 20%, or less than 10% of the entire surface of the laminated glass plate (1).
  3. In claim 1, the thermoplastic intermediate layer (4) comprises a masking layer (5) and a transparent layer (16), the masking layer (5) is completely opaque, and the masking layer extends less than 30%, or less than 20%, or less than 10% of the entire surface of the laminated glass plate (1).
  4. In any one of claims 1 to 3, the masking layer (5) is arranged adjacent to at least the bottom edge of the laminated glass plate (1) and extends to at least 5% or at least 10% of the entire surface of the laminated glass plate (1).
  5. In any one of claims 1 to 3, the opaque region (5') of the masking layer (5) is arranged in a frame-like shape surrounding the perimeter of the edge region of the laminated glass plate (1), and the laminated glass plate (1) has a wider width in the portion (12') that overlaps with the reflective layer (11) than in the other portion (12").
  6. In any one of paragraphs 1 through 3, - The respective surfaces of the reflective layer (11) and the opaque region (5') are arranged jointly. or - The opaque area (5') has a wider surface than the reflective layer (11), and the reflective layer (11) completely overlaps with the opaque area (5') laminated glass plate (1).
  7. In any one of claims 1 to 3, the laminated glass plate (1) further comprises a first masking strip (7) applied to an area on the inner surface (II) of the outer glass plate (2), and at least the heating element (6) completely overlaps with the first masking strip (7).
  8. In any one of claims 1 to 3, the reflective layer (11) has an average transmittance of at least 60%, or at least 70%, or less than 85% in the visible spectrum range, and/or the reflective layer (11) reflects at least 15%, or at least 20%, or at least 30% of the light (12) incident on the reflective layer (11), laminated glass (1).
  9. In any one of claims 1 to 3, the laminated glass plate (1) further comprises a first busbar and a second busbar provided for connection to a voltage source, wherein the first busbar and the second busbar are connected to the edge region of the heating element (6) such that a current path for a heating current passing through the heating element (6) is formed between the busbars.
  10. In any one of claims 1 to 3, the heating element (6) is a laminated glass plate (1) that is completely embedded in the opaque region (5') of the masking layer (5).
  11. In any one of claims 1 to 3, the heating element (6) is a laminated glass plate (1) designed in the form of a heating wire having a diameter of 10 μm to 300 μm or 20 μm to 150 μm.
  12. In paragraph 11, the heating wire contains metal or is made of metal, and the heating wire contains or is composed of copper and/or tungsten, laminated glass (1).
  13. In any one of claims 1 to 3, a high-refractive index coating (17) having a refractive index of at least 1.7 is arranged in an area of at least one inner surface (IV) of the inner glass plate (3), which overlaps with a reflective layer (11), and the high-refractive index coating (17) is arranged in front of the reflective layer (11) when looking at the inner surface (IV) of the inner glass plate (3) spatially at all times.
  14. Projection device (100) including the following: - Laminated glass plate (1) according to any one of paragraphs 1 to 3, - A display device (10) having an image display that is assigned to and faces the reflection layer (11), wherein the image of the image display can be reflected by the reflection layer (11), wherein at least the area of the reflection layer (11) that overlaps with the opaque area (5') of the masking layer (5) can be illuminated by the display device (10).
  15. In a method for manufacturing laminated glass (1) according to any one of claims 1 to 3, (a) An outer glass plate (2), a thermoplastic intermediate layer (4), a heating element (6), a reflective layer (11), and an inner glass plate (3) are arranged to form a layer stack, and Here, the thermoplastic intermediate layer (4) is arranged between the outer glass plate (2) and the inner glass plate (3), and the heating element (6) is arranged within the opaque region (5') of the masking layer (5), and Here, the reflective layer (11) is spatially arranged in front of the masking layer (5) in a direction viewed from the inner glass plate (3) to the outer glass plate (2) and overlaps at least partially with the opaque region (5') of the masking layer (5), and (b) A manufacturing method for forming laminated glass (1) by stacking the obtained layer stacks.
  16. A laminated plate glass (1) according to any one of claims 1 to 3, used as a windshield in a land, air, or water transport vehicle.

Description

Laminated glass for partially heatable projection devices The present invention relates to a partially heatable laminated glass plate for a projection device, a method for producing laminated glass plate, an use, and a projection device. Today, head-up displays are frequently used in vehicles and aircraft. Head-up displays function by utilizing an imaging unit that projects a virtual image onto the image perceived by the driver through an optical module and a projection surface. For example, when this image is reflected through the vehicle's windshield, which serves as the projection surface, important information is presented to the user, which can significantly enhance traffic safety. A vehicle windshield typically consists of two panes of glass laminated together through at least one thermoplastic film. A common problem with head-up displays is that the projected image is reflected from both sides of the windshield. Consequently, the driver does not perceive only the desired primary image generated by the reflection on the inner surface of the windshield (primary reflection). The driver also perceives a slightly offset secondary image, which is generally less intense and generated by the reflection on the outer surface of the windshield (secondary reflection). This problem is typically resolved by aligning the reflective surfaces at a specifically selected angle relative to each other so that the primary and secondary images overlap, and as a result, the secondary image no longer has an interfering effect. Typically, the radiation from a head-up display projector is s-polarized light, taking into account the windshield's better reflective properties compared to p-polarized light. However, if a driver wears polarization-selective sunglasses that transmit only p-polarized light, the driver may barely perceive or not perceive the HUD image at all. Therefore, a HUD projection device compatible with polarization-selective sunglasses is required. Thus, the solution to this problem is to use a projection device that uses p-polarized light. Another issue is the perceptibility of information conveyed by reflected images, regardless of weather and lighting conditions. Drivers must be able to fully perceive important and safety-related information at any time of day or night, even in strong sunlight or rain. Therefore, when designing a display based on head-up display technology, the projector must possess correspondingly powerful power to ensure the projected image has sufficient brightness (especially when sunlight is incident) and is easily visible to the viewer. This requires a projector of a specific size and entails corresponding power consumption. DE 102014220189A1 discloses a head-up display projection device that operates with p-polarized radiation to generate a head-up display image. Since the angle of incidence is generally close to the Brewster angle and the p-polarized radiation is reflected only to a very small extent by the glass surface, the windshield has a reflective structure capable of reflecting the p-polarized radiation toward the driver. The reflective structure proposed is a single metal layer having a thickness of 5 nm to 9 nm, for example, made of silver or aluminum, which is applied to the outer surface of the inner glass plate facing away from the interior of the passenger car. US 2004/0135742A1 also discloses a head-up display projection device having a reflective structure capable of operating with p-polarized radiation to generate a head-up display image and reflecting p-polarized radiation toward the driver. A multilayer polymer layer disclosed in WO 96/19347A3 is presented as the reflective structure. When designing a display based on head-up display technology, the projector must possess correspondingly powerful performance to ensure the projected image has sufficient brightness (especially when sunlight is incident) so that the viewer can see it easily. This requires a projector of a specific size, which is associated with corresponding power consumption and heat dissipation. Basically, it is possible to create a display in the masking area using the same principle as a HUD. Therefore, the masking area is also projected by a projector and reflected to create a display for the driver. For example, information previously displayed on the dashboard area, such as time, travel speed, engine speed, navigation system information, or rear camera images replacing conventional exterior mirrors or rearview mirrors, can be displayed directly on the masking area that meets the lower edge of the windshield in a practical and aesthetically appealing manner. A projection device of this type is disclosed, for example, in DE 102009020824A1. Another major issue while driving is heating the windshield to prevent freezing or fogging that obstructs visibility. In particular, moisture often seeps into the vehicle interior near the lower edge of the windshield, causing condensation to frequently occur. G