Curved HUD Mirror Film Bonding for Easier Polarized Reflection
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Solution Overview
Problem
Existing reflective polarizing multilayer films are difficult to form on curved surfaces, complicating the manufacturing of head-up display apparatuses.
Innovation Solution
A mirror with a reflective curved surface is created by bonding a mirror film to a base material with a curved attachment surface, which reflects polarized visible light and transmits infrared light, allowing for easier manufacturing and improved heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reflective polarizing multilayer film is formed on a curved surface by vapor deposition, then the mirror can reflect polarized visible light and transmit infrared light, but the manufacturing process becomes complex and difficult
Solution Approach 1:
The mirror is divided into two separate components: a curved base material and a flat reflective polarizing multilayer film. The film is formed on a flat substrate first, then bonded to the curved base material. This segmentation allows the complex optical film to be manufactured using simple vapor deposition on a flat surface, while the curved functionality is provided by the base material, thus resolving the contradiction between achieving curved surface optical performance and maintaining manufacturing simplicity.
Solution Approach 2:
An adhesive layer is introduced as an intermediary between the flat reflective polarizing multilayer film and the curved base material. This adhesive mediator enables the bonding of the flat film to the curved surface, allowing the system to achieve both the optical properties of the film and the curved geometry of the base material without direct contact between the film and curved surface, thereby simplifying the manufacturing process.
2Temperature
If infrared light is transmitted through the mirror, then heat resistance is improved, but temperature rise may still occur affecting mirror film peeling
Solution Approach 1:
The harmful infrared light is extracted and directed away from the display panel through the curved reflective surface of the mirror. The mirror reflects infrared light from external sources before it can reach the display panel, removing this harmful thermal factor from the system. This extraction of infrared radiation prevents temperature rise that would otherwise cause mirror film peeling, thus resolving the contradiction between heat resistance and adhesion reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mirror and head-up display apparatus can be manufactured more easily and effectively manage heat, reducing the risk of temperature rise and peeling of the mirror film.
Implementation Method 1
a mirror film that forms the reflective curved surface in a state of being bonded to the attachment surface, reflects light of a polarized component corresponding to the display light in visible light
Implementation Method 2
transmits infrared light
Implementation Method 3
a concave mirror that reflects the display light reflected by the mirror
Data Source
AI summary
To provide a mirror and a head-up display apparatus which can be manufactured more easily. A mirror has a reflective curved surface that reflects display light. The mirror includes: a base material with an attachment surface forming a curved surface; and a mirror film that forms the reflective curved surface in a state of being bonded to the attachment surface, that reflects light of polarized components corresponding to display light in visible light, and that transmits infrared light.