Vehicle Image Display Mirror Polarizing Plate Reflected Image Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image display mirrors for vehicles face challenges in reducing the influence of reflected images from half mirrors, particularly when vehicles have light-transmitting roofs like panoramic roofs or sunroofs, which hinder the visibility of displayed images.
Innovation Solution
An image display mirror design featuring a first polarizing plate that can be switched between attached and removed states, positioned between the half mirror and the viewer, with the polarizing plate's absorption axis parallel to the half mirror's reflection axis when an image is displayed, and perpendicular when not displayed, to minimize the impact of reflected images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a half mirror is used to display images on the monitor, then the image can be viewed through the half mirror, but the reflected image inhibits the visibility of the monitor image when the quantity of light from the rear is large
Solution Approach 1:
A polarizing plate is introduced as an intermediary component between the half mirror and the viewer. This polarizing plate selectively transmits or blocks polarized light to reduce the reflected image's interference with the monitor image visibility, allowing both functions to coexist without mutual inhibition
Solution Approach 2:
The invention changes the optical parameters of the system by using polarized light with specific orientation. By controlling the polarization state of light and matching it with the polarizing plate's transmission axis, the system optimizes the visibility of the monitor image while minimizing the reflected image's harmful effect
2Object-affected harmful factors
If the angle of the half mirror is adjusted to reduce reflected image influence, then the reflected image becomes less inhibiting, but the solution is ineffective when the ceiling transmits light (panoramic roof, sunroof, or convertible car)
Solution Approach 1:
The polarizing plate serves as a mediator that addresses the reflected image problem regardless of ceiling type. Unlike angle adjustment which fails with light-transmitting ceilings, the polarizing plate effectively reduces reflected image influence across all vehicle configurations including panoramic roofs, sunroofs, and convertibles
Solution Approach 2:
By changing from mechanical angle adjustment to optical parameter control (polarization), the solution becomes universally applicable. The polarizing plate's optical property of selectively transmitting or blocking polarized light works effectively regardless of the ceiling structure, providing adaptability to all vehicle types
3Illumination intensity
If a polarizing plate is permanently attached to reduce reflected image influence, then the visibility of the displayed image improves, but the mirror cannot function as a regular mirror when no image is displayed
Solution Approach 1:
The polarizing plate is made movable rather than fixed, allowing it to be positioned in different states. When viewing the monitor image, the plate is attached to reduce reflected image influence; when viewing the rear directly, the plate is removed or positioned to allow full mirror function, providing dynamic adaptability
Solution Approach 2:
The system is divided into separable components - the polarizing plate can be detached from the half mirror assembly. This segmentation allows the polarizing plate to be positioned only when needed for image display, while the half mirror maintains its full reflective function when the plate is removed
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
This configuration enhances the visibility of the displayed image by reducing the influence of reflected images from the half mirror, allowing the mirror to function effectively as both a display and a regular mirror, even in vehicles with light-transmitting roofs.
Implementation Method 1
a first polarizing plate having a polarizer; and when the first polarizing plate is in an attached state, an absorption axis of the polarizer and the reflection axis of the half mirror are parallel to each other
Implementation Method 2
a half mirror having a reflection axis and being configured to reflect polarized light
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
Provided is an image display mirror that includes a half mirror and an image display apparatus, reduces an influence of a reflected image provided by the half mirror, and is excellent in visibility of an image displayed on the image display apparatus. The image display mirror for a vehicle includes a first polarizing plate that is arranged removably and attachably, a half mirror that has a reflection axis and is configured to reflect polarized light, and an image display apparatus in the stated order from a viewer side, in which: the first polarizing plate has a polarizer; and when the first polarizing plate is in an attached state, an absorption axis of the polarizer and the reflection axis of the half mirror are parallel to each other.