HUD reflector with high reflectivity

Abstract

The utility model relates to a high-reflectivity HUD reflector, which comprises a reflector body and a film system structure arranged on the optical surface of the reflector body, and the film system structure comprises six film layers sequentially arranged on the reflector body. The six film layers comprise two aluminum oxide film layers, two silicon dioxide film layers, one trititanium pentoxide film layer and one aluminum film layer. According to the utility model, the reflection times of light on the surface of a product can be increased, so that the overall reflectivity in a visible light wave band is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of HUD, in particular to a HUD reflector with high reflectivity. Background Art

[0002] HUD is an advanced electronic device in cars and other vehicles. It helps drivers get key information more intuitively, such as vehicle speed, navigation instructions and phone numbers, thereby reducing the number of times drivers look down at the instrument. Such a design helps improve driving safety and reduce possible eye movement and distraction during driving.

[0003] In order to achieve efficient reflection in the visible light band, HUD reflectors are usually made by coating aluminum film on a plastic substrate. Most HUD reflectors on the market use this process to improve reflectivity. Aluminum film is widely used due to its excellent cost-effectiveness and stability.

[0004] The refractive index of aluminum film is affected by its microstructure and composition, resulting in a relatively low refractive index, and the average reflectivity at 0° incident angle in the visible light band of 400-700nm can only reach about 90%. If the reflectivity of the reflector is insufficient, the image projected on the reflector will appear dim and the contrast will be reduced, which may make it difficult for the driver to clearly read the display content.

[0005] Therefore, in order to improve the display effect and driving safety of the HUD reflector, it is necessary to increase its reflectivity. Utility Model Content

[0006] The purpose of the utility model is to provide a HUD reflector with high reflectivity, which can increase the number of reflections of light on the product surface, thereby improving the overall reflectivity in the visible light band.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a high-reflectivity HUD reflector, comprising a reflector body and a film structure arranged on the optical surface of the reflector body, the film structure being six film layers sequentially arranged on the reflector body, the six film layers comprising two layers of aluminum oxide film layers, two layers of silicon dioxide film layers, one layer of titanium pentoxide film layer and one layer of aluminum film layer.

[0008] Furthermore, the first layer of the six film layers is an aluminum oxide film layer, the second layer is an aluminum film layer, the third layer is an aluminum oxide film layer, the fourth layer is a silicon dioxide film layer, the fifth layer is a titanium pentoxide film layer, and the sixth layer is a silicon dioxide film layer.

[0009] Furthermore, the thickness of the first layer is 29.9-30.1nm, the thickness of the second layer is 149.9-150.1nm, the thickness of the third layer is 29.9-30.1nm, the thickness of the fourth layer is 44.12-44.32nm, the thickness of the fifth layer is 46.79-46.99, and the thickness of the sixth layer is 29.9-30.1nm.

[0010] Furthermore, the refractive index of the titanium pentoxide film layer is 2.41-2.45, the refractive index of the silicon dioxide film layer is 1.43-1.47, the refractive index of the aluminum oxide film layer is 1.65-1.69, and the refractive index of the aluminum film layer is 0.47-1.55.

[0011] Beneficial effects of the utility model: The utility model provides a high-reflectivity HUD reflector, which improves the reflectivity of the HUD reflector by optimizing the film system structure on the optical surface of the HUD reflector, thereby effectively enhancing the clarity of the displayed content. This improvement enables the driver to more easily read and identify information in the head-up display system, such as vehicle speed, navigation instructions, and telephone numbers; increasing the reflectivity not only improves the clarity of the displayed content, but also significantly reduces the driver's eye fatigue. The use of the head-up display system reduces the number of times the driver looks down at the instrument, but the high-reflectivity reflector can ensure that the displayed content is always bright and clear, thereby reducing the burden on the eyes and improving driving safety. The film system design structure is simple and practical, and it is easy to implement. At the same time, this means that during the implementation process, costs and time can be effectively controlled, and the reliability of the solution can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic structural diagram of the utility model.

[0013] Among them: 1. reflector body, 2. first layer, 3. second layer, 4. third layer, 5. fourth layer, 6. fifth layer, 7. sixth layer. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings. For better understanding, the orientation of the present invention is described according to the orientation shown in the accompanying drawings and cannot be understood as a limitation of the present application; the following terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0015] See also Figure 1The utility model provides an embodiment: a high-reflectivity HUD reflector, comprising a reflector body 1 and a film structure arranged on the optical surface of the reflector body 1, wherein the film structure is six film layers arranged in sequence on the reflector body 1, and the six film layers include two layers of aluminum oxide film layers, two layers of silicon dioxide film layers, one layer of titanium pentoxide film layer and one layer of aluminum film layer. It is deposited on the surface of the HUD plastic reflector by vacuum coating. High-refractive-index titanium pentoxide (TI3O5) and low-refractive-index silicon dioxide (SiO2) materials are used as dielectric film layers. Silicon dioxide has high transmittance, excellent adhesion, good wear resistance and chemical stability, which can further increase the number of reflections of light on the product surface, thereby improving the overall reflectivity in the visible light band. The aluminum film layer increases the transmittance of light, reduces mirror reflected light, makes the eyes see more clearly, and reduces mirror reflected light. A dense and uniform film layer is formed on the surface of the titanium pentoxide film layer, which can cooperate with the aluminum film layer and the silicon dioxide film layer to improve the hardness, wear resistance, corrosion resistance and reflectivity of the reflector. The aluminum oxide film layer has good mechanical firmness and stable chemical properties, becoming a good bonding layer to ensure the adhesion of the metal film layer.

[0016] Please continue reading Figure 1 As shown, in one embodiment of the utility model, the first layer 2 of the six film layers is an aluminum oxide film layer, the second layer 3 is an aluminum film layer, the third layer 4 is an aluminum oxide film layer, the fourth layer 5 is a silicon dioxide film layer, the fifth layer 6 is a titanium pentoxide film layer, and the sixth layer 7 is a silicon dioxide film layer. The first layer 2 is an aluminum oxide film layer, and the aluminum oxide film layer of the first layer 2 can protect the reflector and enhance the hardness, wear resistance, and corrosion resistance of the reflector surface. The aluminum oxide film layer of the third layer 4 can protect the aluminum film layer and prevent further oxidation of the aluminum film layer. The silicon dioxide film layer of the fourth layer 5 and the titanium pentoxide film layer of the fifth layer 6 can further increase the number of reflections of light on the surface of the product. The silicon dioxide film layer of the sixth layer 7 can form a protective layer with high hardness on the surface to prevent the reflector from being scratched.

[0017] Please continue reading Figure 1 As shown, in one embodiment of the utility model, the thickness of the first layer 2 is 29.9-30.1nm, the thickness of the second layer 3 is 149.9-150.1nm of the aluminum film layer, the thickness of the third layer 4 is 29.9-30.1nm, the thickness of the fourth layer 5 is 44.12-44.32nm, the thickness of the fifth layer 6 is 46.79-46.99, and the thickness of the sixth layer 7 is 29.9-30.1nm.

[0018] Please continue reading Figure 1As shown, in one embodiment of the utility model, the refractive index of the titanium pentoxide film layer is 2.41-2.45, the refractive index of the silicon dioxide film layer is 1.43-1.47, the refractive index of the aluminum oxide film layer is 1.65-1.69, and the refractive index of the aluminum film layer is 0.47-1.55.

[0019] The utility model has the following working principle: by optimizing the film system structure on the optical surface of the HUD reflector, a reflector with higher reflectivity can be obtained. The average reflectivity of the improved film system structure in the visible light band of 400-700nm designed at an incident angle of 0° can reach 95%, which significantly improves the display effect and driving safety of the HUD reflector.

[0020] The above description is only a preferred embodiment of the present utility model and cannot be understood as a limitation of the present application. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the present utility model.

Claims

1. A high reflectivity HUD reflector, characterized in that: It includes a reflector body and a film structure arranged on the optical surface of the reflector body, wherein the film structure is six film layers arranged in sequence on the reflector body, and the six film layers include two layers of aluminum oxide film layers, two layers of silicon dioxide film layers, one layer of titanium pentoxide film layer and one layer of aluminum film layer.

2. A high reflectivity HUD reflector according to claim 1, characterized in that: The first layer of the six film layers is an aluminum oxide film layer, the second layer is an aluminum film layer, the third layer is an aluminum oxide film layer, the fourth layer is a silicon dioxide film layer, the fifth layer is a titanium pentoxide film layer, and the sixth layer is a silicon dioxide film layer.

3. The high reflectivity HUD reflector according to claim 2, characterized in that: The thickness of the first layer is 29.9-30.1nm, the thickness of the second layer is 149.9-150.1nm, the thickness of the third layer is 29.9-30.1nm, the thickness of the fourth layer is 44.12-44.32nm, the thickness of the fifth layer is 46.79-46.99, and the thickness of the sixth layer is 29.9-30.1nm.

4. The high reflectivity HUD reflector according to claim 1, characterized in that: The refractive index of the titanium pentoxide film layer is 2.41-2.45, the refractive index of the silicon dioxide film layer is 1.43-1.47, the refractive index of the aluminum oxide film layer is 1.65-1.69, and the refractive index of the aluminum film layer is 0.47-1.55.

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