Cold light mirror of plastic HUD curved reflector
By plating a multi-layer film structure on the plastic HUD curved mirror, the problem of sunlight backflow in the HUD system is solved, and efficient thermal shock stability and cost reduction are achieved.
Patent Information
- Application Number
- CN202421794441.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-29
AI Technical Summary
In existing HUD systems, conventional AL mirrors will cause sunlight backflow, resulting in PGU heating and damage, and the overall cost of cold light mirrors of glass curved mirrors has not been commercialized.
A cold light mirror with a plastic HUD curved mirror is used to achieve efficient visible light reflection and infrared light transmission by plating a multi-layer film structure on the plastic mirror with a Cr film layer and a multi-layer TI3O5 and SIO2 film layer.
It achieves stability and durability under extreme temperature conditions (-40℃ and 105℃), meets the ring measurement indicators, and reduces the overall cost of the HUD system, while ensuring the functional performance of the system.
Smart Images
Figure CN222850763U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of HUD, in particular to a cold light mirror of a plastic HUD curved reflector. Background Art
[0002] HUD, the full name of which is Head-Up Display, is also known as Head-Up Display System or Head-Up Display System in Chinese. This is a technology that uses the principle of optical reflection to project important information (such as vehicle speed, navigation, driving assistance, etc.) in front of the driver's line of sight. The core components of the HUD system include the picture generation unit (PGU), reflectors (primary reflectors and secondary reflectors), front windshield, etc. Its working principle is: the PGU emits light, which is reflected and magnified by the reflector, and finally forms a virtual image on the front windshield, and the driver can see this information directly in front of his line of sight.
[0003] In this structure, if the reflector uses a conventional AL reflector, sunlight will flow back to the PUG, causing the PGU to heat up and be damaged. Therefore, the design of using a cold light mirror to form a reflector is widely used. The cold light mirror can reflect the visible light band of sunlight and prevent the infrared band of sunlight from being incident on the PGU, thereby preventing the PGU from being heated. However, the film thickness of the cold light mirror is relatively thick. At present, the more mature process is to coat the cold light mirror on the flat glass. The flat cold light mirror causes the final imaging distance of the HUD to be shorter. The overall cost of the cold light mirror of the glass curved mirror is relatively high and has not yet been commercialized. Utility Model Content
[0004] The utility model aims to provide a cold light mirror for a plastic HUD curved reflector.
[0005] The utility model provides the following technical solutions:
[0006] The utility model proposes a cold light mirror for a plastic HUD curved reflector, comprising a Cr film layer used for coating on the plastic HUD curved reflector, wherein the Cr film layer is sequentially coated with a first TI3O5 layer, a first SIO2 layer, a second TI3O5 layer, a second SIO2 layer, a third TI3O5 layer, a third SIO2 layer, a fourth TI3O5 layer, a fourth SIO2 layer, a fifth TI3O5 layer, a fifth SIO2 layer, a sixth TI3O5 layer, a sixth SIO2 layer, a seventh TI3O5 layer, a seventh SIO2 layer, an eighth TI3O5 layer, an eighth SIO2 layer, a ninth TI3O5 layer, and a ninth SIO2 layer.
[0007] Further, the thickness of the Cr film layer is 49.5-50.5nm, the thickness of the first TI3O5 layer is 35.48-36.2nm, the thickness of the first SIO2 layer is 113.24-115.52nm, the thickness of the second TI3O5 layer is 58.46-59.64nm, the thickness of the second SIO2 layer is 115.39-117.73nm, the thickness of the third TI3O5 layer is 57.45-58.61nm, the thickness of the third SIO2 layer is 104.68-106.80nm, the thickness of the fourth TI3O5 layer is 64.61-65.91nm, the thickness of the fourth SIO2 layer is 98.78-100.78nm, and the thickness of the fifth TI3O5 layer is 113.24-115.52nm. The thickness is 53.02-54.1nm, the thickness of the fifth SIO2 layer is 71.13-72.57nm, the thickness of the sixth TI3O5 layer is 37.33-38.09nm, the thickness of the sixth SIO2 layer is 63.70-64.98nm, the thickness of the seventh TI3O5 layer is 50.57-51.549nm, the thickness of the seventh SIO2 layer is 83.72-85.42nm, the thickness of the eighth TI3O5 layer is 40.77-41.59nm, the thickness of the eighth SIO2 layer is 78.71-80.3nm, the thickness of the ninth TI3O5 layer is 24.04-24.52nm, and the thickness of the ninth SIO2 layer is 190.61-194.47nm.
[0008] Further, the thickness of the Cr film layer is 50nm, the thickness of the first TI3O5 layer is 35.84nm, the thickness of the first SIO2 layer is 114.38nm, the thickness of the second TI3O5 layer is 59.05nm, the thickness of the second SIO2 layer is 116.56nm, the thickness of the third TI3O5 layer is 58.03nm, the thickness of the third SIO2 layer is 105.74nm, the thickness of the fourth TI3O5 layer is 65.26nm, the thickness of the fourth SIO2 layer is 99.78nm, and the thickness of the fifth TI3O5 layer is 59.05nm. The thickness of the fifth SIO2 layer is 53.56nm, the thickness of the fifth SIO2 layer is 71.85nm, the thickness of the sixth TI3O5 layer is 37.71nm, the thickness of the sixth SIO2 layer is 64.34nm, the thickness of the seventh TI3O5 layer is 51.08nm, the thickness of the seventh SIO2 layer is 84.57nm, the thickness of the eighth TI3O5 layer is 41.18nm, the thickness of the eighth SIO2 layer is 79.5nm, the thickness of the ninth TI3O5 layer is 24.28nm, and the thickness of the ninth SIO2 layer is 192.54nm.
[0009] Compared with the prior art, the utility model provides a cold light mirror for a plastic HUD curved reflector. The utility model can achieve environmental testing of cold and hot shocks: -40°C, stabilization time of 30 minutes, 105°C, stabilization time of 30 minutes, temperature conversion time of 5S, and 500 cycles without film cracking. Moreover, the utility model can meet the requirement of no film peeling after environmental testing, which not only reduces the cost of HUD, but also meets the functional requirements of HUD, and has a simple and practical structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a schematic diagram of the relationship between the film layers of the utility model.
[0011] (This figure does not show the film thickness)
[0012] 00-HUD curved reflector; 1-Cr film layer; 2-first TI3O5 layer; 3-first SIO2 layer; 4-second TI3O5 layer; 5-second SIO2 layer; 6-third TI3O5 layer; 7-third SIO2 layer; 8-fourth TI3O5 layer; 9-fourth SIO2 layer; 10-fifth TI3O5 layer; 11-fifth SIO2 layer; 13-sixth TI3O5 layer; 14-sixth SIO2 layer; 15-seventh TI3O5 layer; 16-seventh SIO2 layer; 17-eighth TI3O5 layer; 18-eighth SIO2 layer; 19-ninth TI3O5 layer; 20-ninth SIO2 layer. DETAILED DESCRIPTION
[0013] The following is combined with Figure 1 The utility model is further described.
[0014] In one embodiment of the utility model, the utility model proposes a cold light mirror for a plastic HUD curved reflector, including a Cr film layer 1 for coating on the plastic HUD curved reflector 00, on which the first TI3O5 layer 2, the first SIO2 layer 3, the second TI3O5 layer 4, the second SIO2 layer 5, the third TI3O5 layer 6, the third SIO2 layer 7, the fourth TI3O5 layer 8, the fourth SIO2 layer 9, the fifth TI3O5 layer 10, the fifth SIO2 layer 11, the sixth TI3O5 layer 13, the sixth SIO2 layer 14, the seventh TI3O5 layer 15, the seventh SIO2 layer 16, the eighth TI3O5 layer 17, the eighth SIO2 layer 18, the ninth TI3O5 layer 19, and the ninth SIO2 layer 20 are sequentially coated. The first layer is a metal-plated Cr film layer, and the adhesion of Cr ensures the bonding between the film layer and the plastic HUD curved reflector. Starting from the Cr film layer, the utility model includes 19 film layers, among which empty plating is performed between the fifth SIO2 layer 11 and the sixth TI3O5 layer 13, so as to help reduce the plating temperature to the temperature at which the first layer starts to be plated, thereby ensuring that the thermal stress of the overall film layer is smaller.
[0015] In one embodiment of the present invention, the thickness of the Cr film layer 1 is 49.5-50.5nm, the thickness of the first TI3O5 layer 2 is 35.48-36.2nm, the thickness of the first SIO2 layer 3 is 113.24-115.52nm, the thickness of the second TI3O5 layer 4 is 58.46-59.64nm, the thickness of the second SIO2 layer 5 is 115.39-117.73nm, the thickness of the third TI3O5 layer 6 is 57.45-58.61nm, the thickness of the third SIO2 layer 7 is 104.68-106.80nm, the thickness of the fourth TI3O5 layer 8 is 64.61-65.91nm, the thickness of the fourth SIO2 layer 9 is 98.78-100.78nm, the thickness of the fifth TI3O5 layer 10 is The thickness is 53.02-54.1nm, the thickness of the fifth SIO2 layer 11 is 71.13-72.57nm, the thickness of the sixth TI3O5 layer 13 is 37.33-38.09nm, the thickness of the sixth SIO2 layer 14 is 63.70-64.98nm, the thickness of the seventh TI3O5 layer 15 is 50.57-51.549nm, the thickness of the seventh SIO2 layer 16 is 83.72-85.42nm, the thickness of the eighth TI3O5 layer 17 is 40.77-41.59nm, the thickness of the eighth SIO2 layer 18 is 78.71-80.3nm, the thickness of the ninth TI3O5 layer 19 is 24.04-24.52nm, and the thickness of the ninth SIO2 layer 20 is 190.61-194.47nm.
[0016] The above embodiment has a reflectivity of more than 90% in the visible light band, an imaging distance of 10-15m, and can meet the environmental test indicators of thermal shock: -40℃, stabilization time 30min, 105℃, stabilization time 30min, temperature conversion time 5S, and 500 cycles; and can meet the environmental test without film peeling after 100 grids.
[0017] In one embodiment of the present invention, the thickness of the Cr film layer is 50 nm, the thickness of the first TI3O5 layer is 35.84 nm, the thickness of the first SIO2 layer is 114.38 nm, the thickness of the second TI3O5 layer is 59.05 nm, the thickness of the second SIO2 layer is 116.56 nm, the thickness of the third TI3O5 layer is 58.03 nm, the thickness of the third SIO2 layer is 105.74 nm, the thickness of the fourth TI3O5 layer is 65.26 nm, the thickness of the fourth SIO2 layer is 99.78 nm, and the fifth TI The thickness of the TI3O5 layer is 53.56nm, the thickness of the fifth SIO2 layer is 71.85nm, the thickness of the sixth TI3O5 layer is 37.71nm, the thickness of the sixth SIO2 layer is 64.34nm, the thickness of the seventh TI3O5 layer is 51.08nm, the thickness of the seventh SIO2 layer is 84.57nm, the thickness of the eighth TI3O5 layer is 41.18nm, the thickness of the eighth SIO2 layer is 79.5nm, the thickness of the ninth TI3O5 layer is 24.28nm, and the thickness of the ninth SIO2 layer is 192.54nm.
[0018] The above utility model has an average reflectivity of 95.6% in the visible light (400-650nm) band and an average transmittance of 96.6% in the infrared (750-3000nm) band when the incident angle is set to 25 degrees. The imaging distance is within 10-15m, and it can meet the environmental test indicators of hot and cold shock: -40℃, stabilization time 30min, 105℃, stabilization time 30min, temperature conversion time 5S, and 500 cycles; the film will not fall off after 100 grids are tested.
[0019] In practical applications, a Cr film layer 1, a first TI3O5 layer 2, a first SIO2 layer 3, a second TI3O5 layer 4, a second SIO2 layer 5, a third TI3O5 layer 6, a third SIO2 layer 7, a fourth TI3O5 layer 8, a fourth SIO2 layer 9, a fifth TI3O5 layer 10, a fifth SIO2 layer 11, a sixth TI3O5 layer 13, a sixth SIO2 layer 14, a seventh TI3O5 layer 15, a seventh SIO2 layer 16, an eighth TI3O5 layer 17, an eighth SIO2 layer 18, a ninth TI3O5 layer 19, and a ninth SIO2 layer 20 are sequentially plated on a plastic HUD curved reflector by a vacuum electron beam evaporation coating machine. After the fifth SIO2 layer 11 is plated, the coating is left untreated for 20 minutes, and then the sixth TI3O5 layer 13 is plated, so as to reduce the coating temperature to the temperature at which the first layer starts to be plated, thereby ensuring that the thermal stress of the overall film layer is smaller.
[0020] The implementation modes of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A cold light mirror for a plastic HUD curved reflector, characterized in that: It comprises a Cr film layer for coating on the plastic HUD curved reflector, on which the Cr film layer is sequentially coated with a first TI3O5 layer, a first SIO2 layer, a second TI3O5 layer, a second SIO2 layer, a third TI3O5 layer, a third SIO2 layer, a fourth TI3O5 layer, a fourth SIO2 layer, a fifth TI3O5 layer, a fifth SIO2 layer, a sixth TI3O5 layer, a sixth SIO2 layer, a seventh TI3O5 layer, a seventh SIO2 layer, an eighth TI3O5 layer, an eighth SIO2 layer, a ninth TI3O5 layer, and a ninth SIO2 layer.
2. The cold light mirror of a plastic HUD curved reflector according to claim 1, characterized in that: The thickness of the Cr film layer is 49.5-50.5nm, the thickness of the first TI3O5 layer is 35.48-36.2nm, the thickness of the first SIO2 layer is 113.24-115.52nm, the thickness of the second TI3O5 layer is 58.46-59.64nm, the thickness of the second SIO2 layer is 115.39-117.73nm, the thickness of the third TI3O5 layer is 57.45-58.61nm, the thickness of the third SIO2 layer is 104.68-106.80nm, the thickness of the fourth TI3O5 layer is 64.61-65.91nm, the thickness of the fourth SIO2 layer is 98.78-100.78nm, and the thickness of the fifth TI3O5 layer is The thickness of the fifth SIO2 layer is 53.02-54.1nm, the thickness of the fifth SIO2 layer is 71.13-72.57nm, the thickness of the sixth TI3O5 layer is 37.33-38.09nm, the thickness of the sixth SIO2 layer is 63.70-64.98nm, the thickness of the seventh TI3O5 layer is 50.57-51.549nm, the thickness of the seventh SIO2 layer is 83.72-85.42nm, the thickness of the eighth TI3O5 layer is 40.77-41.59nm, the thickness of the eighth SIO2 layer is 78.71-80.3nm, the thickness of the ninth TI3O5 layer is 24.04-24.52nm, and the thickness of the ninth SIO2 layer is 190.61-194.47nm.
3. The cold light mirror of a plastic HUD curved reflector according to claim 1, characterized in that: The thickness of the Cr film layer is 50 nm, the thickness of the first TI3O5 layer is 35.84 nm, the thickness of the first SIO2 layer is 114.38 nm, the thickness of the second TI3O5 layer is 59.05 nm, the thickness of the second SIO2 layer is 116.56 nm, the thickness of the third TI3O5 layer is 58.03 nm, the thickness of the third SIO2 layer is 105.74 nm, the thickness of the fourth TI3O5 layer is 65.26 nm, the thickness of the fourth SIO2 layer is 99.78 nm, and the thickness of the fifth TI3O5 layer is The thickness of the fifth SIO2 layer is 53.56nm, the thickness of the fifth SIO2 layer is 71.85nm, the thickness of the sixth TI3O5 layer is 37.71nm, the thickness of the sixth SIO2 layer is 64.34nm, the thickness of the seventh TI3O5 layer is 51.08nm, the thickness of the seventh SIO2 layer is 84.57nm, the thickness of the eighth TI3O5 layer is 41.18nm, the thickness of the eighth SIO2 layer is 79.5nm, the thickness of the ninth TI3O5 layer is 24.28nm, and the thickness of the ninth SIO2 layer is 192.54nm.