Head up display system

Abstract

The invention relates to the technical field of head up display, in particular to a head up display system on an automobile. The head up display system comprises a projection light source, laminated glass and a transparent nanometer film, wherein the transparent nanometer film comprises at least one laminated structure of high reflective index layers / low reflective index layers which sediment sequentially outwards from the surface of an inner glass board; the projection light source is used for generating P polarized light, the P polarized light enters the transparent nanometer film, the reflectivity of the P polarized light from the transparent nanometer film is not lower than 5%, and the incident angle of the P polarized light ranges from 42 degrees to 72 degrees. Only a reflection image of the transparent nanometer film can be observed when a reflection image on the laminated glass is observed visually, a reflection image of an uncoated surface can be neglected, and therefore the ghosting problem of the reflection image of the head up display system is avoided; by means of the head up display system, application and popularization of an HUD technology are facilitated, the safe driving environment is provided, the overall structure and process are simple, the cost is low, and the head up display system is safe, durable, attractive and elegant.

Description

Technical field: [0001] The invention relates to the technical field of head-up display, in particular to a head-up display system on a car. Background technique: [0002] With the development of science and technology, head-up display (HUD, Head Up Display) systems are increasingly used in automobiles. The head-up display system on the car can display important driving information, such as speed, engine speed, fuel consumption, tire pressure, navigation and information of external smart devices in the driver's field of vision on the front windshield in real time, so that driving The driver can see the driving information without bowing his head, so as to avoid distracting the road ahead; at the same time, the driver does not have to adjust his eyes between observing the distant road and the nearby instrument, which can avoid eye fatigue and greatly improve the Enhance driving safety and improve driving experience. [0003] At present, the realization of head-up display te...

AI Technical Summary

Problems solved by technology

However, these technical solutions have the following disadvantages: 1. The ghost image cannot be completely eliminated, and it is not suitable for high-definition image display; 2. The PVB diaphragm with special specifications is required, and its price is 7 to 10 times that of ordinary PVB diaphragms, and the process is difficult 3. Sensitive to the optical design of the car model, the front windshield of the specific car model needs to be redesigned

However, this technical solution has the following disadvantages: 1. The anti-reflection film is deposited on the surface of the laminated glass in contact with the air, especially when it is deposited on the surface of the laminated glass facing the outside of the car, it is difficult to withstand harsh operating environments, such as acid rain, Dust, wiper friction or alkaline cleaning agent, etc.; 2. The anti-reflection film is difficult to completely eliminate ghosting, especially when viewed from a high angle, there are still light blue or lavender reflections; 3. Deposition on the laminated glass facing the outside of the car The anti-reflection film on the surface of the laminated glass will be covered with a layer of water film when it encounters rainy days. At this time, the anti-reflection effect will be significantly reduced, which will eventually lead to serious ghosting; 4. The anti-reflection film is set on the surface of the laminated glass that is in contact with the air. , cannot eliminate the reflected image produced on the interface of the added low-e coating, and there is still a certain degree of ghosting phenomenon

Obviously, on the one hand, this technical solution destroys the overall uniformity or appearance of the car's front windshield, and on the other hand, it does not fundamentally eliminate the ghosting phenomenon.

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