Linear polarized light reflection coated glass
By using linear polarized light reflective coating technology on the head-up display glass, the problem of insufficient filming is solved, and high transparency and high color rendering index are achieved, ensuring that the driver can clearly observe the red and green signal lights, improving driving safety.
Patent Information
- Application Number
- CN202422066785.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The current head-up displays that the glass is not clear and thorough enough because the film is not clear and thorough, which affects the driver's observation of the red and green signal lights, which in turn affects driving safety.
Linear polarized light reflective coating glass is adopted, including a 2mm thick ultra-white glass plate and a six-layer coating film layer arranged on the first surface of the glass plate. The coating film layer is composed of Nb2O5 and SiO2 materials. The specific thickness and material ratio are: the first film layer 74±2nm Nb2O5, the second film layer 140±2nm SiO2, the third film layer 32±1nm Nb2O5, the fourth film layer 21±1nm SiO2, the fifth film layer 39±1nm Nb2O5, and the sixth film layer 41±2nm SiO2.
The ghosting problem is effectively solved. The transmission CRI value reaches more than 98%, which is close to colorless, allowing the driver to clearly observe the red and green signal lights, and there is no obvious color cast when observing the road outside the car, which complies with the standards and specifications for the use of automobile glass.
Smart Images
Figure CN222975082U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coated glass, and particularly relates to a linearly polarized light reflective coated glass. Background Art
[0002] With the development of science and technology, head-up display (HUD) systems are increasingly used in automobiles. At present, the realization of head-up display technology mainly adopts the projection imaging method, that is, the front windshield of the automobile itself or an additional optical element is used for projection display, and using the front windshield to reflect the projection image is the simplest structure. Generally, the front windshield is laminated glass. When the light emitted by the projection light source of the head-up display system passes through the two surfaces of the laminated glass in contact with the air, reflection will occur, and the reflected images on the two surfaces will shift to form two interfering double images.
[0003] To solve the problem of double images of the head-up display system on the front windshield of an automobile, the phenomenon of double images visible to the naked eye can be reduced by enhancing the reflected light formed on the surface of the laminated glass in contact with the air. For example, the common film-type HUD projector in the accessory market pre-pastes a semi-transparent reflective film in the HUD projection area, so that the reflected image that can be observed by the human eye mainly comes from the reflected light of the pasted semi-transparent reflective film.
[0004] Although the above technical solution for solving the double image problem of the head-up display system can reduce the double image problem to a certain extent, the following disadvantages still exist in actual application: because the film on the glass is not clear and transparent enough, it affects the driver's observation of red and green traffic lights, and thus affects driving safety. Content of the Utility Model
[0005] The purpose of the utility model is to provide a linearly polarized light reflective coated glass, which effectively solves the problem that the current head-up display glass affects the driver's observation of red and green traffic lights because the film is not clear and transparent enough.
[0006] To solve the above technical problem, the technical solution adopted by the utility model is:
[0007] A linearly polarized light reflective coated glass includes a glass plate and a coating film layer. The glass plate includes a first surface and a second surface facing away from each other. The coating film layer is provided on the first surface. The coating film layer includes a first film layer, a second film layer, a third film layer, a fourth film layer, a fifth film layer, and a sixth film layer sequentially arranged outward from the first surface.
[0008] The thickness of the first film layer is 74 ± 2 nm, the thickness of the second film layer is 140 ± 2 nm, the thickness of the third film layer is 32 ± 1 nm, the thickness of the fourth film layer is 21 ± 1 nm, the thickness of the fifth film layer is 39 ± 1 nm, and the thickness of the sixth film layer is 41 ± 1 nm.
[0009] The materials of the first film layer, the third film layer and the fifth film layer are Nb 2 O 5 , and the materials of the second film layer, the fourth film layer and the sixth film layer are SiO 2 .
[0010] Further, the glass plate is an ultra-clear glass plate with a thickness of 2 mm.
[0011] Further, the thickness of the first film layer is 74.7 nm, the thickness of the second film layer is 140.5 nm, the thickness of the third film layer is 32.4 nm, the thickness of the fourth film layer is 21 nm, the thickness of the fifth film layer is 39.1 nm, and the thickness of the sixth film layer is 41.5 nm.
[0012] Further, the reflectivity of the glass plate to light incident at an incident angle of 8° is less than or equal to 8.5%, and the transmittance to light incident at an incident angle of 0° is greater than or equal to 91%.
[0013] Further, the linearly polarized light reflecting coated glass has a reflectivity of less than 17% to light incident at an incident angle of 8°, a transmittance of greater than 70% to light incident at an incident angle of 0°, and a reflectivity of greater than 17% to P-polarized light incident at an incident angle of 65°.
[0014] Compared with the prior art, the beneficial technical effects of the present utility model are:
[0015] The present utility model can not only effectively solve the problem of double images, but also be clearer and more transparent compared with the prior art. The CRI value of the transmitted light reaches more than 98%, approaching colorless, so that the driver can clearly observe the red and green signal lights. In addition, when observed from inside the vehicle, there is no obvious color cast. In summary, the present utility model is suitable for making head-up display glass and meets the use standard specifications of automotive glass. Description of the Drawings
[0016] Figure 1 is a schematic structural diagram of the present utility model.
[0017] List of reference numerals: glass plate - 1; first surface - 11; second surface - 12; first film layer - 2; second film layer - 3; third film layer - 4; fourth film layer - 5; fifth film layer - 6; sixth film layer - 7. Detailed Description of the Embodiment
[0018] To facilitate the understanding of the technical solution of the present utility model, the terms involved in the present utility model are first explained.
[0019] P-polarized light: When light penetrates the surface of an optical element at a non-vertical angle, both the reflection and projection characteristics depend on the polarization phenomenon. In this case, the coordinate system used is defined by the plane containing the input and reflected light beams. If the polarization vector of the light is within this plane, it is called P-polarized light.
[0020] CRI: Represents the color rendering index. The color rendering index is represented by Ra. The larger the Ra value, the better the color rendering property of the light source.
[0021] A linearly polarized light reflecting coated glass, as Figure 1 shown, includes a glass plate 1 and a coating film layer. The glass plate 1 includes a first surface 11 and a second surface 12 facing away from each other. The coating film layer is provided on the first surface 11, and the coating film layer includes a first film layer 2, a second film layer 3, a third film layer 4, a fourth film layer 5, a fifth film layer 6, and a sixth film layer 7 arranged in sequence outward from the first surface 11. In this embodiment, the glass plate 1 is an ultra-clear glass plate with a thickness of 2 mm.
[0022] The materials of the first film layer 2, the third film layer 4, and the fifth film layer 6 are Nb 2 O 5 and the materials of the second film layer 3, the fourth film layer 5, and the sixth film layer 7 are SiO 2 .
[0023] The thickness of the first film layer 2 is 74 ± 2 nm, the thickness of the second film layer 3 is 140 ± 2 nm, the thickness of the third film layer 4 is 32 ± 1 nm, the thickness of the fourth film layer 5 is 21 ± 1 nm, the thickness of the fifth film layer 6 is 39 ± 1 nm, and the thickness of the sixth film layer 7 is 41 ± 1 nm. In this embodiment, the thickness of the first film layer 2 is 74.7 nm, the thickness of the second film layer 3 is 140.5 nm, the thickness of the third film layer 4 is 32.4 nm, the thickness of the fourth film layer 5 is 21 nm, the thickness of the fifth film layer 6 is 39.1 nm, and the thickness of the sixth film layer 7 is 41.5 nm.
[0024] In this embodiment, the reflectivity of the ultra-clear glass plate to light incident at an incident angle of 8° is less than or equal to 8.5%, and the transmittance to light incident at an incident angle of 0° is greater than or equal to 91%.
[0025] The linearly polarized light reflecting coated glass of this embodiment has a reflectivity of less than 17% to light incident at an incident angle of 8°, a transmittance of greater than 70% to light incident at an incident angle of 0°, and a reflectivity of greater than 17% to P-polarized light incident at an incident angle of 65°.
[0026] This embodiment has no ghosting problem, and there is no obvious color cast when observing the road exterior scene from inside the vehicle; moreover, the transmitted CRI value reaches more than 98%, approaching colorless, so that the driver can clearly observe the red and green traffic lights. Therefore, the utility model is suitable for manufacturing head-up display glass and meets the use standard specifications of automotive glass.
[0027] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.
Claims
1. A linearly polarized light reflecting coated glass, characterized in that: The invention comprises a glass plate and a coating layer, wherein the glass plate comprises a first surface and a second surface opposite to each other, the coating layer is arranged on the first surface, and the coating layer comprises a first film layer, a second film layer, a third film layer, a fourth film layer, a fifth film layer and a sixth film layer arranged outward from the first surface in sequence; The thickness of the first film layer is 74±2nm, the thickness of the second film layer is 140±2nm, the thickness of the third film layer is 32±1nm, the thickness of the fourth film layer is 21±1nm, the thickness of the fifth film layer is 39±1nm, and the thickness of the sixth film layer is 41±1nm; The materials of the first film layer, the third film layer and the fifth film layer are Nb2O5, and the materials of the second film layer, the fourth film layer and the sixth film layer are SiO2.
2. The linearly polarized light reflecting coated glass according to claim 1, characterized in that: The glass plate is an ultra-clear glass plate with a thickness of 2 mm.
3. The linearly polarized light reflecting coated glass according to claim 2, characterized in that: The thickness of the first film layer is 74.7 nm, the thickness of the second film layer is 140.5 nm, the thickness of the third film layer is 32.4 nm, the thickness of the fourth film layer is 21 nm, the thickness of the fifth film layer is 39.1 nm, and the thickness of the sixth film layer is 41.5 nm.