Window Display Device Anti-Scattering Polarizing Layers
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Solution Overview
Problem
Window display devices attached to vehicles face issues such as increased thickness and decreased optical properties, leading to scattering problems when used in vehicle windows.
Innovation Solution
A window display device is designed with multiple polarizing layers and supporting films, including quarter-wavelength and half-wavelength films, to prevent scattering and improve durability, robustness, and optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display apparatus is attached to the window of vehicles, then display function is provided, but scattering occurs and optical properties decrease
Solution Approach 1:
The patent applies quarter-wavelength (λ/4) and half-wavelength (λ/2) films to convert the harmful scattering effect into a beneficial anti-glare effect. By carefully selecting the optical path lengths of these films, reflected light from the display is converted to glare-free light, transforming the scattering problem into an anti-glare solution that improves viewing comfort while maintaining display functionality.
Solution Approach 2:
The patent uses a composite structure consisting of multiple polarizing layers with different optical properties (λ/4 films and λ/2 films) combined with the display panel. This composite material approach allows the system to simultaneously achieve display function and anti-glare performance by combining the optical effects of different materials in a layered configuration.
2Object-affected harmful factors
If multiple polarizing layers are added to prevent scattering, then optical properties improve, but device complexity increases
Solution Approach 1:
The patent employs thin film technology to implement the anti-glare function. The λ/4 and λ/2 films are deposited as thin layers on the display surface, providing the required optical functionality without adding significant structural complexity or thickness. This thin film approach maintains simplicity while achieving the desired optical performance.
3Object-affected harmful factors
If quarter-wavelength and half-wavelength films are used, then scattering is prevented, but manufacturing complexity increases
Solution Approach 1:
The patent controls the optical path lengths of the polarizing layers by adjusting their physical thickness and refractive index parameters. The λ/4 films have optical path lengths of λ/4 and the λ/2 films have optical path lengths of λ/2 at specific wavelengths. By precisely controlling these parameters during manufacturing, the desired anti-glare effect is achieved while maintaining manufacturability through standard thin film deposition techniques.
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 device effectively prevents scattering and maintains optical properties, ensuring clear display and improved durability for vehicle windows.
Implementation Method 1
a first polarizing layer disposed on a first surface of the first glass and a second polarizing layer disposed on a second surface of the first glass. The first polarizing layer includes a first supporting film and a first polarizing film disposed on the first supporting film. The second polarizing layer includes a second supporting film and a second polarizing film disposed on the second supporting film.
Implementation Method 2
The first polarizing film and the second polarizing film may be quarter-wavelength (1/4λ) films.
Implementation Method 3
the window display device may further include a half-wavelength (1/2λ) film disposed on the second surface of the display panel.
Data Source
AI summary
A window display device according to the present inventive concept, the window display device includes a display panel configured to display an image, a first glass disposed on a first surface of the display panel, a first laminating member including a first polarizing layer disposed on a first surface of the first glass and a second polarizing layer disposed on a second surface of the first glass. The first polarizing layer includes a first supporting film and a first polarizing film disposed on the first supporting film. The second polarizing layer includes a second supporting film and a second polarizing film disposed on the second supporting film.